CN114600552B

CN114600552B - A communication method, device and equipment

Info

Publication number: CN114600552B
Application number: CN201980101651.0A
Authority: CN
Inventors: 于海凤; 李秉肇; 陈磊
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-10-28
Filing date: 2019-10-28
Publication date: 2024-08-09
Anticipated expiration: 2039-10-28
Also published as: WO2021081711A1; CN114600552A

Abstract

The application relates to a communication method, a device and equipment. One of the communication methods is applicable to the terminal equipment. The terminal device sends first information to the first network device in a first user identity. The second information included in the first information requests establishment, reestablishment, or restoration of the RRC connection with the second user identity, and the third information included in the first information indicates completion of establishment, reestablishment, or restoration of the RRC connection with the second user identity. The terminal device receives fourth information from the first network device in the first user identity, the fourth information being used to respond to the first information. If the terminal equipment needs to establish connection with the network by the second user identity, the RRC connection between the second user identity and the network can be established through the RRC connection of the first user identity, so that the requirement of establishing the RRC connection between the second user identity and the network can be met, the time required by the process of establishing the RRC connection can be reduced, the time delay of a service is reduced, and the use experience of a user is improved.

Description

Communication method, device and equipment

Technical Field

The present application relates to the field of mobile communications technologies, and in particular, to a communications method, apparatus, and device.

Background

The current terminal equipment (such as a mobile phone) is not only a common single-card mobile phone, but also a large number of double-card double-standby mobile phones are on the market. Dual card dual standby means that the handset can be plugged into two subscriber identity module (subscriber identification module, SIM)/universal integrated circuit card (universal integrated circuit card, UICC) cards and both cards can be on standby at the same time.

In addition, the concept is that the double cards are double-standby and double-pass or the double cards are double-standby and single-pass. By "single pass" or "double pass" is meant whether two cards in a cell phone can conduct a service at the same time (e.g., two cards can make a call at the same time), if two cards in a cell phone can conduct a service at the same time, the cell phone is double-card/double-standby double-pass, and if two cards in a cell phone cannot conduct a service at the same time, the cell phone is double-card double-standby single-pass.

For a dual-card dual-standby single-pass mobile phone, when the SIM1 card is in a radio resource control (radio resource control, RRC) connection state, the SIM2 card is in an RRC idle state or an RRC inactive state. If the SIM2 card has data to send or receive, the RRC connection of the SIM1 card needs to be cut off, and the RRC connection of the SIM2 card and the network needs to be established or restored. This process takes a long time, resulting in a longer delay of the traffic.

Disclosure of Invention

The embodiment of the application provides a communication method, a device and equipment, which are used for reducing service time delay.

In a first aspect, there is provided a first communication method applicable to a terminal device supporting a first user identity and a second user identity, the method comprising: transmitting first information to first network equipment by using a first user identity, wherein the first information comprises second information and third information, the terminal equipment is in an RRC connection state in a network where the first user identity is located, and is in an RRC idle state or an RRC inactive state in the network where the second user identity is located, the second information is used for requesting to establish the RRC connection by using the second user identity, the third information is used for indicating to establish the RRC connection by using the second user identity or requesting to reestablish the RRC connection by using the second user identity, the third information is used for indicating to reestablish the RRC connection by using the second user identity or requesting to resume the RRC connection by using the second user identity, and the third information is used for indicating to resume the RRC connection by using the second user identity; fourth information is received from the first network device with the first user identity, the fourth information being for responding to the first information.

The method may be performed by a first communication device, which may be a communication apparatus or a communication device, such as a chip, capable of supporting the functions required by the communication apparatus to implement the method. The first communication means is, for example, a terminal device, or a chip arranged in the terminal device for realizing the functions of the terminal device, or other components for realizing the functions of the terminal device. In the following description, the first communication apparatus is exemplified as a terminal device.

In the embodiment of the application, the terminal equipment is in an RRC connection state according to the first user identity, and is in an RRC idle state or an RRC inactive state according to the second user identity. If the connection between the second user identity and the network is required to be established, the first information corresponding to the second user identity can be sent to the first network equipment through the first user identity, so that the RRC connection between the second user identity and the network is established through the RRC connection of the first user identity, the requirement of the second user identity on the establishment of the RRC connection with the network can be met, the time required for establishing the RRC connection process can be reduced, the time delay of a service is reduced, and the use feeling of a user is improved.

In a possible implementation manner, the second information is information included in a third message in a random access process corresponding to the second user identity, where the third message is an RRC establishment request message, an RRC reestablishment request message, or an RRC recovery request message.

When the application scenario is different, the second information may be information included in different messages, including but not limited to an RRC setup request message, an RRC reestablishment request message, an RRC resume request message, or the like. Equivalently, the information included in the third message in the random access process corresponding to the second user identity can be sent to the network through the first user identity, and when the first user identity is not disconnected with the first network device, the random access process of the second user identity can be performed, so that the process of establishing RRC connection of the second user identity is quickened, and the time delay is reduced.

In a possible implementation manner, the third information is information included in a fifth message in the random access procedure corresponding to the second user identity, where the fifth message is an RRC establishment complete message, an RRC reestablishment complete message, or an RRC recovery complete message.

When the application scenario is different, the third information may be information included in different messages, including but not limited to an RRC setup complete message, an RRC reestablishment complete message, an RRC resume complete message, or the like. If the second information is an RRC establishment request message, the third information is an RRC establishment completion message; or if the second information is an RRC reestablishment request message, the third information is an RRC reestablishment completion message; or if the second information is an RRC resume request message, the third information is an RRC resume complete message. Equivalently, the information included in the third message and the information included in the fifth message in the random access process corresponding to the second user identity may be sent to the network through the first user identity, and when the first user identity is not disconnected from the first network device, the random access process of the second user identity can be performed, and the information included in the third message and the information included in the fifth message can be sent together, so that the process of establishing the RRC connection of the second user identity is further accelerated, and the time delay is reduced.

In one possible implementation, receiving fourth information from the first network device with the first user identity includes:

the fourth information is transmitted through an RRC reconfiguration message.

The fourth information includes response information of the second information and response information of the third information. For example, the second network device may add the fourth information to a message, e.g. referred to as a second combined message, corresponding to the second combined message comprising the fourth information. Of course, the message may have other names, and the names of the messages do not limit the messages themselves. The second combined message may multiplex the existing message or may be a newly added message according to the embodiment of the present application. For example, one implementation of the second combined message is that the second combined message is specifically an RRC reconfiguration message. Of course the implementation of the second combined message is not limited thereto. The second network device may send the second combined message to the first network device, which receives the second combined message, i.e. the fourth information. The response information of the second information may include all or part of information of the fourth message in the random access procedure corresponding to the second user identity, and the response information of the third information may include all or part of information of the RRC reconfiguration message. Then, to add the information included in the fourth message and the information included in the RRC reconfiguration message to one message, if there is a duplicate portion in the information included in the fourth message and the information included in the RRC reconfiguration message, only one portion needs to be included in the second combined message for the duplicate portion. By the method, redundant information in the second combined message can be reduced, the overhead of the second combined message is reduced, and the success rate of effective information transmission can be improved.

Or the second network device may put the response information of the second information and the response information of the third information into different messages, and send the response information of the second information and the response information of the third information to the first network device, which is equivalent to that the second network device sends the fourth information to the first network device.

In one possible implementation, before sending the first information to the first network device with the first user identity, the method further comprises:

it is determined to send first information to the first network device in a first user identity.

Before the terminal device sends the first information to the first network device with the first user identity, it may first be determined whether the first information can be sent to the first network device with the first user identity, so that the probability of a transmission error may be reduced as much as possible.

In one possible implementation, determining to send first information to a first network device with a first user identity includes:

Determining to send the first information to a first network device in the first user identity according to the difference between the first time advance and a second time advance being less than or equal to a first threshold, wherein the first time advance is the time advance corresponding to the communication of the first user identity in the first network device by the terminal device, the second time advance is the time advance corresponding to the communication of the second user identity in a second network device by the terminal device, and the second network device is the network device in which the second user identity resides by the terminal device; or alternatively, the first and second heat exchangers may be,

And according to the first indication information from the second network equipment, determining to initiate a random access process corresponding to the first user identity to the first network equipment by the first user identity.

The difference between the first time advance and the second time advance is less than or equal to the first threshold, which may be understood as the first time advance being equal to or close to the second time advance (if the first threshold is 0, the first time advance is equal to the second time advance). The first threshold may be configured by the first network device, or by the second network device, or determined by the terminal device itself, or specified by a protocol. If the first time advance is equal to or close to the second time advance, the terminal equipment can be basically ensured to correctly receive the information related to the second user identity by the first user identity. To make the first time advance equal to or close to the second time advance, for example, one way is for the first network device and the second network device to co-camp. Of course, other ways of making the first time advance equal or close to the second time advance are possible in addition to this. Or the first time advance and the second time advance may be neither equal nor similar, for example, the difference between the first time advance and the second time advance may be greater than the first threshold, as long as both the first network device and the second network device know the first time advance and the second time advance, and the first time advance and the second time advance are considered when the information is sent, so that the terminal device can correctly receive the information related to the second user identity with the first user identity.

Or the terminal equipment can determine to initiate the random access process corresponding to the second user identity to the first network equipment by the first user identity according to the first indication information from the second network equipment, so that the corresponding time advance is not required to be obtained, and the method is simpler.

Transmitting fifth information to the first network device by the first user identity, wherein the fifth information comprises a random access preamble in a random access process corresponding to the second user identity;

And receiving sixth information from the first network device according to the first user identity, wherein the sixth information is used for responding to the fifth information, and the sixth information comprises the second time advance, wherein the second time advance is unequal to the first time advance, and the second network device is the network device where the terminal device resides according to the second user identity.

For example, before the terminal device sends the first information to the first network device with the first user identity, the terminal device may also send fifth information to the first network device with the first user identity, where the fifth information may include a random access preamble in a random access procedure corresponding to the second user identity. For example, the terminal device may send, to the first network device, a first message in a random access procedure corresponding to the second user identity with the first user identity, where the first message may be regarded as a random access preamble. After the first network device receives the fifth information, the fifth information may be forwarded to a second network device where the second user identity resides, where the second network device receives the fifth information from the first network device. The second network device may generate sixth information from the fifth information and transmit the sixth information to the first network device, and the first network device receives the sixth information from the second network device. The sixth information is used for responding to the fifth information, for example, the sixth information may include all or part of information included in the second message in the random access procedure corresponding to the second user identity. The second time advance may be included in the sixth information. For example, the second network device may send a second message in a random access procedure corresponding to the second user identity to the first network device, where the second message includes sixth information, and the first network device may receive the second message from the second network device. The terminal equipment can obtain the second time advance through the normal interaction process with the first network equipment, and the second time advance is not needed to be obtained through other information, so that the signaling overhead is saved.

In one possible implementation, the sending of the fifth information to the first network device with the first user identity includes one or more of:

Transmitting the fifth information to the first network device by using the first user identity and using a fourth physical resource, wherein the fourth physical resource is different from a third physical resource, and the third physical resource is used for transmitting a random access preamble corresponding to the first user identity to the first network device by using the first user identity; or alternatively, the first and second heat exchangers may be,

The fifth information includes an identification of the second user identity.

Or describing the embodiment as transmitting fifth information to the first network device with the first user identity, including one or more of:

Transmitting the fifth information to the first network device by using the first user identity, wherein the fifth information is transmitted through a fourth physical resource, the fourth physical resource is different from a third physical resource, and the third physical resource is used for transmitting a random access preamble corresponding to the first user identity to the first network device by using the first user identity; or alternatively, the first and second heat exchangers may be,

The fifth information includes an identification of the second user identity.

If the terminal device is to send fifth information to the first network device with the first user identity, the fifth information corresponds to the second user identity, and the terminal device also sends information related to the first user identity to the first network device with the first user identity, for example, when the terminal device performs random access with the first user identity, the terminal device also sends a first message corresponding to the first user identity to the first network device with the first user identity. The information corresponding to the first user identity and the information corresponding to the second user identity can be sent by the first user identity, and if the information is not distinguished, response errors of the first network equipment can be caused. Therefore, in the embodiment of the application, the terminal equipment can distinguish the random access preamble corresponding to the fifth information and the first user identity through the physical resource; or the fifth information and the random access preamble corresponding to the first user identity can be distinguished through the identification of the user identity; or the random access preamble corresponding to the fifth information and the first user identity can be distinguished through physical resources, or the random access preamble corresponding to the fifth information and the first user identity can be distinguished through the identification of the user identity. By distinguishing the fifth information from the random access preamble corresponding to the first user identity, the first network device can be enabled to determine which user identity the received information corresponds to, so that correct processing can be performed.

In one possible implementation, the first information is sent to the first network device with the first user identity, including one or more of:

Transmitting the first information to the first network device by using the first user identity and using a second SRB (SRB), wherein the second SRB is different from a first SRB, and the first SRB is used for transmitting information corresponding to the first user identity to the first network device by using the first user identity; or alternatively, the first and second heat exchangers may be,

Transmitting the first information to the first network device by using the first user identity and using a second logic channel corresponding to a first SRB, wherein the second logic channel is different from the first logic channel, and the first logic channel is used for transmitting the information corresponding to the first user identity to the first network device by using the first user identity; or alternatively, the first and second heat exchangers may be,

And sending the first information to the first network equipment by using the first user identity and using a second physical resource, wherein the second physical resource is different from a first physical resource, and the first physical resource is used for sending information corresponding to the first user identity to the first network equipment by using the first user identity.

Or the embodiment is described as transmitting first information to a first network device with a first user identity, including one or more of:

Transmitting the first information to the first network device by using the first user identity, wherein the first information is transmitted through a second SRB, the second SRB is different from a first SRB, and the first SRB is used for transmitting information corresponding to the first user identity to the first network device by using the first user identity; or alternatively, the first and second heat exchangers may be,

Transmitting the first information to the first network device by the first user identity, wherein the first information is transmitted through a second logic channel corresponding to a first SRB, the second logic channel is different from a first logic channel, and the first logic channel is used for transmitting the information corresponding to the first user identity to the first network device by the first user identity; or alternatively, the first and second heat exchangers may be,

And sending the first information to the first network equipment by the first user identity, wherein the first information is transmitted through a second physical resource, the second physical resource is different from the first physical resource, and the first physical resource is used for sending information corresponding to the first user identity to the first network equipment by the first user identity.

If the terminal device is to send the first information to the first network device with the first user identity, the first information corresponds to the second user identity, and the terminal device also sends the information corresponding to the first user identity to the first network device with the first user identity, for example, when the terminal device performs random access with the first user identity, the terminal device also sends a third message or a fifth message corresponding to the first user identity to the first network device with the first user identity. The information corresponding to the first user identity and the information corresponding to the second user identity can be sent by the first user identity, and if the information is not distinguished, response errors of the first network equipment can be caused. Therefore, in the embodiment of the present application, the terminal device may also distinguish the first information from the information corresponding to the first user identity.

In the embodiment of the present application, the distinguishing manner of the terminal device may include one or more of the following: the first information and the information corresponding to the first user identity are distinguished through SRB, the first information and the information corresponding to the first user identity are distinguished through a logic channel, the first information and the information corresponding to the first user identity are distinguished through the identification of the user identity, or the first information and the information corresponding to the first user identity are distinguished through physical resources. For example, the terminal device may distinguish the first information from information corresponding to the first user identity through the SRB; or the terminal equipment can distinguish the first information from the information corresponding to the first user identity through the logic channel and the user identity; or the terminal equipment can distinguish the first information from the information corresponding to the first user identity through SRB, a logic channel and the user identity; or the terminal device may distinguish the first information from the information corresponding to the first user identity through the SRB, the logical channel, the physical resource, and the identity of the user, and so on. By distinguishing the first information from the information corresponding to the first user identity, the first network device can determine which user identity the received information corresponds to, and thus can perform correct processing.

In one possible implementation, the fourth information from the first network device is received with the first user identity, including one or more of:

Receiving the fourth information from the first network device with the first user identity and with a fourth SRB, the fourth SRB being different from a third SRB, the third SRB being configured to receive information corresponding to the first user identity from the first network device with the first user identity; or alternatively, the first and second heat exchangers may be,

Receiving the fourth information from the first network device with the first user identity and with a fourth logical channel corresponding to a third SRB, the fourth logical channel being different from a third logical channel, the third logical channel being configured to receive information corresponding to the first user identity from the first network device with the first user identity; or alternatively, the first and second heat exchangers may be,

Receiving the fourth information from the first network device with the first user identity and with a second physical resource, the second physical resource being different from a first physical resource, the first physical resource being used to receive information corresponding to the first user identity from the first network device with the first user identity.

Or describing the embodiment as receiving fourth information from the first network device with the first user identity, including one or more of:

Receiving, with the first user identity, the fourth information from the first network device, the fourth information being transmitted over a fourth SRB, the fourth SRB being different from a third SRB, the third SRB being configured to receive, with the first user identity, information corresponding to the first user identity from the first network device; or alternatively, the first and second heat exchangers may be,

Receiving, with the first user identity, the fourth information from the first network device, the fourth information being transmitted over a fourth logical channel corresponding to a third SRB, the fourth logical channel being different from a third logical channel, the third logical channel being for receiving, with the first user identity, information corresponding to the first user identity from the first network device; or alternatively, the first and second heat exchangers may be,

Receiving the fourth information from the first network device with the first user identity, the fourth information being transmitted over a second physical resource, the second physical resource being different from a first physical resource, the first physical resource being used to receive information corresponding to the first user identity from the first network device with the first user identity.

If the terminal device is to receive the fourth information from the first network device with the first user identity, the fourth information corresponds to the second user identity, and the terminal device also receives the information corresponding to the first user identity from the first network device with the first user identity, for example, when the terminal device performs random access with the first user identity, the terminal device also receives the third message or the fifth message corresponding to the first user identity from the first network device with the first user identity, and so on. The information corresponding to the first user identity and the information corresponding to the second user identity can be received by the first user identity, and if the information is not distinguished, response errors of the terminal equipment can be caused. Therefore, in the embodiment of the present application, the terminal device may also distinguish the fourth information from the information corresponding to the first user identity.

In the embodiment of the present application, the distinguishing manner of the terminal device may include one or more of the following: the fourth information and the information corresponding to the first user identity are distinguished through SRB, the fourth information and the information corresponding to the first user identity are distinguished through a logic channel, the fourth information and the information corresponding to the first user identity are distinguished through the identification of the user identity, or the fourth information and the information corresponding to the first user identity are distinguished through physical resources. For example, the terminal device may distinguish the fourth information from the information corresponding to the first user identity through the SRB; or the terminal equipment can distinguish the fourth information from the information corresponding to the first user identity through the logic channel and the user identity; or the terminal equipment can distinguish the fourth information from the information corresponding to the first user identity through SRB, a logic channel and the identification of the user identity; or the terminal device may distinguish the fourth information from the information corresponding to the first user identity through the SRB, the logical channel, the physical resource, and the identity of the user, and so on. By distinguishing the fourth information from the information corresponding to the first user identity, the first network device can make it clear which user identity the received information corresponds to, and thus can perform correct processing.

In a possible implementation manner, the fourth information includes second indication information, where the second indication information is used to instruct the terminal device to communicate in a second network with the second user identity, or is used to instruct the terminal device to communicate in a first network with the second user identity, where the second network is a network corresponding to the second user identity, and the first network is a network corresponding to the first user identity.

If the second indication information indicates that the terminal device communicates in the second network with the second user identity, then the terminal device may subsequently send to the second network device with the second user identity if second user identity related information is to be sent to the network. And if the second indication information indicates that the terminal device communicates in the first network with the second user identity, the terminal device may then continue to forward via the first user identity if the second user identity related information is to be sent to the network. For example, if the amount of information corresponding to the second user identity of the terminal device is smaller, the second indication information may indicate that the terminal device communicates in the first network with the second user identity, so that communication of the first user identity is not affected, and information corresponding to the second user identity is transmitted; or the information amount corresponding to the second user identity of the terminal equipment is larger, the second indication information can indicate the terminal equipment to communicate in the second network with the second user identity so as to ensure that the communication of the second user identity is normally performed.

The subsequent communication mode of the second user identity can be indicated through the second indication information, so that the communication modes of the network equipment and the terminal equipment for the second user identity are kept consistent.

In a second aspect, there is provided a second communication method, the method comprising: receiving first information of terminal equipment from a first user identity, wherein the first information comprises second information and third information, the terminal equipment supports the first user identity and the second user identity, the terminal equipment is in an RRC connection state in a network where the first user identity is located, the terminal equipment is in an RRC idle state or an RRC inactive state in the network where the second user identity is located, the second information is used for requesting to establish the RRC connection with the second user identity, the third information is used for requesting to reestablish the RRC connection with the second user identity, or the second information is used for requesting to reestablish the RRC connection with the second user identity, the third information is used for requesting to reestablish the RRC connection with the second user identity, or the second information is used for requesting to resume the RRC connection with the second user identity, and the third information is used for requesting to resume the RRC connection with the second user identity; determining fourth information according to the first information, wherein the fourth information is used for responding to the first information; and sending the fourth information to the terminal equipment of the first user identity.

The method may be performed by a second communication device, which may be a communication apparatus or a communication device, such as a chip, capable of supporting the functions required by the communication apparatus to implement the method. The second communication device is a network device, or a chip provided in the network device for implementing a function of the network device, or another component for implementing a function of the network device. In the following description, the second communication apparatus is exemplified as the first network device.

In a possible implementation manner, the sending the fourth information to the terminal device of the first user identity includes:

the fourth information is transmitted through an RRC reconfiguration message.

In one possible embodiment, before receiving the first information from the terminal device of the first user identity, the method further comprises:

Receiving fifth information of the terminal equipment from the first user identity, wherein the fifth information comprises a random access preamble in a random access process corresponding to the second user identity;

And sending sixth information to the terminal equipment of the first user identity, wherein the sixth information is used for responding to the fifth information, the sixth information comprises the second time advance, the second time advance is not equal to the first time advance, and the second network equipment is network equipment where the terminal equipment resides in the second user identity.

In one possible implementation, the fifth information of the terminal device from the first user identity is received, including one or more of the following:

Receiving the fifth information transmitted by a fourth physical resource from the terminal equipment of the first user identity, wherein the fourth physical resource is different from a third physical resource, and the third physical resource is used for the terminal equipment to send a random access preamble corresponding to the first user identity to the first network equipment by the first user identity; or alternatively, the first and second heat exchangers may be,

The fifth information includes an identification of the second user identity.

In one possible implementation, the first information from the terminal device of the first user identity is received, including one or more of the following:

Receiving the first information transmitted by a second SRB from the terminal equipment with the first user identity, wherein the second SRB is different from a first SRB, and the first SRB is used for the terminal equipment to send information corresponding to the first user identity to the first network equipment with the first user identity; or alternatively, the first and second heat exchangers may be,

Receiving the first information transmitted from the terminal equipment of the first user identity through a second logic channel corresponding to a first SRB, wherein the second logic channel is different from a first logic channel, and the first logic channel is used for the terminal equipment to send the information corresponding to the first user identity to the first network equipment by the first user identity; or alternatively, the first and second heat exchangers may be,

And receiving the first information transmitted by a second physical resource from the terminal equipment with the first user identity, wherein the second physical resource is different from the first physical resource, and the first physical resource is used for the terminal equipment to send the information corresponding to the first user identity to the first network equipment with the first user identity.

In a possible implementation manner, the sending of the fourth information to the terminal device of the first user identity includes one or more of the following:

transmitting the fourth information to a terminal device of the first user identity through a fourth SRB, wherein the fourth SRB is different from a third SRB, and the third SRB is used for receiving, by the terminal device, information corresponding to the first user identity from the first network device with the first user identity; or alternatively, the first and second heat exchangers may be,

Transmitting the fourth information to the first user identity through a fourth logical channel corresponding to a third SRB, wherein the fourth logical channel is different from a third logical channel, and the third logical channel is used for the terminal equipment to receive the information corresponding to the first user identity from the first network equipment by using the first user identity; or alternatively, the first and second heat exchangers may be,

And sending the fourth information to the terminal equipment of the first user identity through a second physical resource, wherein the second physical resource is different from the first physical resource, and the first physical resource is used for the terminal equipment to receive the information corresponding to the first user identity from the first network equipment by the first user identity.

Regarding the technical effects brought about by the second aspect or the various possible embodiments, reference may be made to the description of the technical effects of the first aspect or the corresponding embodiments.

In a third aspect, a third communication method is provided, the method being applicable to a terminal device supporting a first user identity and a second user identity, the method comprising: sending a third message to a first network device by using a first user identity, wherein the third message is a third message in a random access process corresponding to the second user identity, and the third message is used for requesting to establish, reestablish or recover RRC connection by using the second user identity, wherein the terminal device is in an RRC connection state in a network where the first user identity is located, and is in an RRC idle state or an RRC inactive state in the network where the second user identity is located; and receiving a fourth message from the first network device according to the first user identity, wherein the fourth message is a fourth message in a random access process corresponding to the second user identity, and the fourth message is used for responding to the third message.

The method may be performed by a third communication device, which may be a communication apparatus or a communication device, such as a chip, capable of supporting the functions required by the communication apparatus to implement the method. The third communication means is, for example, a terminal device, or a chip provided in the terminal device for realizing the functions of the terminal device, or other components for realizing the functions of the terminal device. In the following description, the third communication apparatus is exemplified as a terminal device.

In the embodiment of the application, the terminal equipment is in an RRC connection state according to the first user identity, and is in an RRC idle state or an RRC inactive state according to the second user identity. If the connection between the second user identity and the network is required to be established, a third message corresponding to the second user identity can be sent to the first network equipment through the first user identity, so that the RRC connection between the second user identity and the network is assisted through the RRC connection of the first user identity, the requirement of the second user identity on the RRC connection with the network can be met, the time required by the RRC connection establishment process can be reduced, the speed of the second user identity on the RRC connection with the network is accelerated, the service time delay is reduced, and the use experience of a user is improved.

In one possible embodiment, the method further comprises:

And sending a fifth message in the random access process corresponding to the second user identity to the first network equipment by the second user identity, wherein the fifth message is used for indicating that the establishment, the reestablishment or the recovery of the RRC connection by the second user identity is completed.

After receiving the fourth message in the random access procedure corresponding to the second user identity from the first network device through the first user identity, the terminal device may consider that the terminal device is in an RRC connected state with the second user identity, and the terminal device may send the fifth message to the second network device with the second user identity, and may continue to execute the subsequent communication procedure with the second user identity.

In one possible implementation, before sending the third message to the first network device with the first user identity, the method further comprises:

Determining to send the third message to the first network device with the first user identity.

In one possible implementation, determining to send the third message to the first network device with the first user identity includes:

Determining to send the third message to the first network device in the first user identity according to the difference between the first time advance and the second time advance being less than or equal to a first threshold, wherein the first time advance is the time advance corresponding to the communication of the terminal device in the first network device in the first user identity, the second time advance is the time advance corresponding to the communication of the terminal device in the second network device in the second user identity, and the second network device is the network device in which the terminal device resides in the second user identity; or alternatively, the first and second heat exchangers may be,

According to the first indication information from the second network device, determining to initiate a random access procedure of the second user identity to the first network device with the first user identity.

Transmitting first information to the first network equipment by the first user identity, wherein the first information comprises a random access preamble in a random access process corresponding to the second user identity;

And receiving second information from the first network equipment according to the first user identity, wherein the second information is used for responding to the first information, the second information comprises the second time advance, the second time advance is unequal to the first time advance, and the second network equipment is network equipment where the terminal equipment resides according to the second user identity.

For example, before the terminal device sends the third message to the first network device with the first user identity, the terminal device may also send first information to the first network device with the first user identity, where the first information may include a random access preamble in a random access procedure corresponding to the second user identity. For example, the terminal device may send, to the first network device, a first message in a random access procedure corresponding to the second user identity with the first user identity, where the first message may be regarded as a random access preamble. After the first network device receives the first information, the first information may be forwarded to a second network device where the second user identity resides, where the second network device receives the first information from the first network device. The second network device may generate second information from the first information and send the second information to the first network device, which receives the second information from the second network device. The second information is used for responding to the first information, for example, the second information may include all or part of information included in the second message in the random access procedure corresponding to the second user identity. A second time advance may be included in the second information. For example, the second network device may send a second message in the random access procedure corresponding to the second user identity to the first network device, where the second message includes the second information, and the first network device may receive the second message from the second network device. The terminal equipment can obtain the second time advance through the normal interaction process with the first network equipment, and the second time advance is not needed to be obtained through other information, so that the signaling overhead is saved.

In one possible implementation, the sending of the first information to the first network device with the first user identity includes one or more of:

Transmitting the first information to the first network device by using the first user identity and using a fourth physical resource, wherein the fourth physical resource is different from a third physical resource, and the third physical resource is used for transmitting a random access preamble corresponding to the first user identity to the first network device by using the first user identity; or alternatively, the first and second heat exchangers may be,

The first information includes an identification of the second user identity.

Or describing the embodiment as sending first information to the first network device with the first user identity, including one or more of:

transmitting the first information to the first network device by using the first user identity, wherein the first information is transmitted through a fourth physical resource, the fourth physical resource is different from a third physical resource, and the third physical resource is used for transmitting a random access preamble corresponding to the first user identity to the first network device by using the first user identity; or alternatively, the first and second heat exchangers may be,

The first information includes an identification of the second user identity.

If the terminal device is to send the first information to the first network device with the first user identity, the first information corresponds to the second user identity, and the terminal device also sends the first user identity related information to the first network device with the first user identity, for example, when the terminal device performs random access with the first user identity, the terminal device also sends the first message corresponding to the first user identity to the first network device with the first user identity. The information corresponding to the first user identity and the information corresponding to the second user identity can be sent by the first user identity, and if the information is not distinguished, response errors of the first network equipment can be caused. Therefore, in the embodiment of the application, the terminal equipment can distinguish the random access preamble corresponding to the first information and the first user identity through the physical resource; or the first information and the random access preamble corresponding to the first user identity can be distinguished through the identification of the user identity; or the first information and the random access preamble corresponding to the first user identity can be distinguished through physical resources, or the first information and the random access preamble corresponding to the first user identity can be distinguished through the identification of the user identity. By distinguishing the first information from the random access preamble corresponding to the first user identity, the first network device can be enabled to determine which user identity the received information corresponds to, so that correct processing can be performed.

In one possible implementation, the sending of the third message to the first network device with the first user identity includes one or more of:

Transmitting the third message to the first network device with the first user identity and with a second SRB, the second SRB being different from a first SRB, the first SRB being configured to transmit information corresponding to the first user identity to the first network device with the first user identity; or alternatively, the first and second heat exchangers may be,

Transmitting the third message to the first network device by using the first user identity and using a second logical channel corresponding to a first SRB, wherein the second logical channel is different from a first logical channel, and the first logical channel is used for transmitting information corresponding to the first user identity to the first network device by using the first user identity; or alternatively, the first and second heat exchangers may be,

And sending the third message to the first network device by using the first user identity and using a second physical resource, wherein the second physical resource is different from a first physical resource, and the first physical resource is used for sending information corresponding to the first user identity to the first network device by using the first user identity.

Or the embodiment is described as sending a third message to the first network device with the first user identity, including one or more of:

Transmitting the third message to the first network device by using the first user identity, wherein the third message is transmitted through a second SRB, the second SRB is different from a first SRB, and the first SRB is used for transmitting information corresponding to the first user identity to the first network device by using the first user identity; or alternatively, the first and second heat exchangers may be,

Transmitting the third message to the first network device by using the first user identity, wherein the third message is transmitted through a second logic channel corresponding to a first SRB, the second logic channel is different from a first logic channel, and the first logic channel is used for transmitting information corresponding to the first user identity to the first network device by using the first user identity; or alternatively, the first and second heat exchangers may be,

And sending the third message to the first network equipment by the first user identity, wherein the third message is transmitted through a second physical resource, the second physical resource is different from a first physical resource, and the first physical resource is used for sending information corresponding to the first user identity to the first network equipment by the first user identity.

If the terminal device is to send a third message to the first network device with the first user identity, the third message corresponds to the second user identity, and the terminal device also sends information corresponding to the first user identity to the first network device with the first user identity, for example, when the terminal device performs random access with the first user identity, the terminal device also sends a third message corresponding to the first user identity to the first network device with the first user identity, and so on. The information corresponding to the first user identity and the information corresponding to the second user identity can be sent by the first user identity, and if the information is not distinguished, response errors of the first network equipment can be caused. Therefore, in the embodiment of the application, the terminal equipment can also distinguish the three messages and the information corresponding to the first user identity.

In the embodiment of the present application, the distinguishing manner of the terminal device may include one or more of the following: the first information and the information corresponding to the first user identity are distinguished through SRB, the third information and the information corresponding to the first user identity are distinguished through a logic channel, the third information and the information corresponding to the first user identity are distinguished through the identification of the user identity, or the third information and the information corresponding to the first user identity are distinguished through physical resources. For example, the terminal device may distinguish the third message from the information corresponding to the first user identity through the SRB; or the terminal equipment can distinguish the third message from the information corresponding to the first user identity through the logic channel and the user identity; or the terminal equipment can distinguish the third message from the information corresponding to the first user identity through SRB, a logic channel and the user identity; or the terminal device may distinguish the third message from the information corresponding to the first user identity through the SRB, the logical channel, the physical resource, and the identity of the user, and so on. By distinguishing the third message from the information corresponding to the first user identity, the first network device can make it clear to which user identity the received information corresponds, so that correct processing can be performed.

In one possible implementation, receiving a fourth message from the first network device with the first user identity includes one or more of:

receiving the fourth message from the first network device with the first user identity and with a fourth SRB, the fourth SRB being different from a third SRB, the third SRB being configured to receive information corresponding to the first user identity from the first network device with the first user identity; or alternatively, the first and second heat exchangers may be,

Receiving the fourth message from the first network device with the first user identity and with a fourth logical channel corresponding to a third SRB, the fourth logical channel being different from a third logical channel, the third logical channel being configured to receive information corresponding to the first user identity from the first network device with the first user identity; or alternatively, the first and second heat exchangers may be,

Receiving the fourth message from the first network device with the first user identity and with a second physical resource, the second physical resource being different from a first physical resource, the first physical resource being for receiving information corresponding to the first user identity from the first network device with the first user identity.

Or describing the embodiment as receiving a fourth message from the first network device with the first user identity, including one or more of:

Receiving the fourth message from the first network device with the first user identity, the fourth message being transmitted over a fourth SRB, the fourth SRB being different from a third SRB, the third SRB being configured to receive information corresponding to the first user identity from the first network device with the first user identity; or alternatively, the first and second heat exchangers may be,

Receiving, with the first user identity, the fourth message from the first network device, the fourth message being transmitted over a fourth logical channel corresponding to a third SRB, the fourth logical channel being different from a third logical channel, the third logical channel being for receiving, with the first user identity, information corresponding to the first user identity from the first network device; or alternatively, the first and second heat exchangers may be,

Receiving the fourth message from the first network device with the first user identity, the fourth message being transmitted over a second physical resource, the second physical resource being different from a first physical resource, the first physical resource being for receiving information corresponding to the first user identity from the first network device with the first user identity.

If the terminal device is to receive the fourth message from the first network device with the first user identity, the fourth message corresponds to the second user identity, and the terminal device also receives the information corresponding to the first user identity from the first network device with the first user identity, for example, when the terminal device performs random access with the first user identity, the terminal device also receives the fourth message corresponding to the first user identity from the first network device with the first user identity, and so on. The information corresponding to the first user identity and the information corresponding to the second user identity can be received by the first user identity, and if the information is not distinguished, response errors of the terminal equipment can be caused. Therefore, in the embodiment of the present application, the terminal device may also distinguish the fourth message from the information corresponding to the first user identity.

In the embodiment of the present application, the distinguishing manner of the terminal device may include one or more of the following: the information corresponding to the fourth message and the first user identity is distinguished through SRB, the information corresponding to the fourth message and the first user identity is distinguished through a logic channel, the information corresponding to the fourth message and the first user identity is distinguished through the identification of the user identity, or the information corresponding to the fourth message and the first user identity is distinguished through physical resources. For example, the terminal device may distinguish, by the SRB, the fourth message from information corresponding to the first user identity; or the terminal equipment can distinguish the fourth message from the information corresponding to the first user identity through the logic channel and the user identity; or the terminal equipment can distinguish the fourth message from the information corresponding to the first user identity through SRB, a logic channel and the user identity; or the terminal device may distinguish the fourth message from the information corresponding to the first user identity through the SRB, the logical channel, the physical resource, and the identity of the user, and so on. By distinguishing the fourth message from the information corresponding to the first user identity, the first network device can be enabled to determine which user identity the received information corresponds to, and thus to perform correct processing.

In a possible implementation manner, the fourth message includes second indication information, where the second indication information is used to instruct the terminal device to communicate in a second network with the second user identity, or is used to instruct the terminal device to communicate in a first network with the second user identity, where the second network is a network corresponding to the second user identity, and the first network is a network corresponding to the first user identity.

In a fourth aspect, there is provided a fourth communication method, the method comprising: receiving a third message from a terminal device of a first user identity, wherein the third message is a third message in a random access process corresponding to the second user identity, and the third message is used for requesting to establish, reestablish or recover RRC connection with the second user identity, wherein the terminal device supports the first user identity and the second user identity, the terminal device is in an RRC connection state in a network where the first user identity is located, and is in an RRC idle state or an RRC inactive state in a network where the second user identity is located; determining a fourth message according to the third message, wherein the fourth message is a fourth message in a random access process corresponding to the second user identity, and the fourth message is used for responding to the third message; and sending the fourth message to the terminal equipment of the first user identity.

The method may be performed by a fourth communication device, which may be a communication apparatus or a communication device, such as a chip, capable of supporting the functions required by the communication apparatus to implement the method. The fourth communication means is a network device, or a chip provided in the network device for implementing a function of the network device, or other components for implementing a function of the network device, for example. In the following description, the fourth communication device is taken as an example of the first network device.

In one possible embodiment, the method further comprises:

And receiving a fifth message in a random access process corresponding to the second user identity from the second user identity, wherein the fifth message is used for indicating that the establishment, the reestablishment or the recovery of the RRC connection with the second user identity is completed.

Receiving first information of the terminal equipment from the first user identity, wherein the first information comprises a random access preamble in a random access process corresponding to the second user identity;

And sending second information to the terminal equipment of the first user identity, wherein the second information is used for responding to the first information, the second information comprises the second time advance, the second time advance is not equal to the first time advance, and the second network equipment is network equipment where the terminal equipment resides in the second user identity.

In one possible implementation, the first information of the terminal device from the first user identity is received, including one or more of the following:

Receiving the first information transmitted by a fourth physical resource from the terminal equipment of the first user identity, wherein the fourth physical resource is different from a third physical resource, and the third physical resource is used for the terminal equipment to send a random access preamble corresponding to the first user identity to the first network equipment by the first user identity; or alternatively, the first and second heat exchangers may be,

The fifth information includes an identification of the second user identity.

In one possible implementation, the third message from the terminal device of the first user identity is received, including one or more of the following:

Receiving the third message transmitted by a second SRB from the terminal equipment with the first user identity, wherein the second SRB is different from a first SRB, and the first SRB is used for the terminal equipment to send information corresponding to the first user identity to the first network equipment with the first user identity; or alternatively, the first and second heat exchangers may be,

Receiving the third message transmitted by a second logic channel corresponding to a first SRB from a terminal device of the first user identity, wherein the second logic channel is different from a first logic channel, and the first logic channel is used for the terminal device to send information corresponding to the first user identity to the first network device by the first user identity; or alternatively, the first and second heat exchangers may be,

And receiving the third message transmitted by a second physical resource from the terminal equipment with the first user identity, wherein the second physical resource is different from a first physical resource, and the first physical resource is used for the terminal equipment to send information corresponding to the first user identity to the first network equipment with the first user identity.

In a possible implementation manner, the sending of the fourth message to the terminal device of the first user identity includes one or more of the following:

Transmitting the fourth message to a terminal device of the first user identity through a fourth SRB, wherein the fourth SRB is different from a third SRB, and the third SRB is used for receiving information corresponding to the first user identity from the first network device by the terminal device with the first user identity; or alternatively, the first and second heat exchangers may be,

Transmitting the fourth message to the first user identity through a fourth logical channel corresponding to a third SRB, wherein the fourth logical channel is different from a third logical channel, and the third logical channel is used for the terminal device to receive information corresponding to the first user identity from the first network device with the first user identity; or alternatively, the first and second heat exchangers may be,

And sending the fourth message to the terminal equipment of the first user identity through a second physical resource, wherein the second physical resource is different from the first physical resource, and the first physical resource is used for the terminal equipment to receive information corresponding to the first user identity from the first network equipment by the first user identity.

Regarding the technical effects brought about by the fourth aspect or the various possible embodiments, reference may be made to the description of the technical effects of the third aspect or the corresponding embodiments.

In a fifth aspect, there is provided a communication device, for example the first communication device as described above. The first communication device is configured to perform the method of the first aspect or any possible implementation manner. In particular, the first communication device may comprise means for performing the method of the first aspect or any of the possible embodiments, e.g. comprising a processing means and a transceiver means. The transceiver module may include a transmitting module and a receiving module, which may be different functional modules or may be the same functional module, but may implement different functions. The first communication means is, for example, a communication device or a chip or other component provided in a communication device. The communication device is illustratively a terminal device. The first communication device is a terminal device. For example, the transceiver module may also be implemented by a transceiver, and the processing module may also be implemented by a processor. Or the sending module may be implemented by a sender, and the receiving module may be implemented by a receiver, which may be different functional modules, or may be the same functional module, but may implement different functions. If the first communication means is a communication device, the transceiver is implemented, for example, by an antenna, a feeder, a codec, etc. in the communication device. Or if the first communication means is a chip provided in the communication device, the transceiver (or the transmitter and the receiver) is, for example, a communication interface in the chip, which is connected to a radio frequency transceiver component in the communication device to enable the transceiving of information by the radio frequency transceiver component. In the introduction of the fifth aspect, the first communication apparatus is a terminal device, and the processing module, the transmitting module, and the receiving module are taken as examples to be described. Wherein,

The sending module is configured to send first information to a first network device with a first user identity, where the first information includes second information and third information, the terminal device supports the first user identity and the second user identity, the terminal device is in an RRC connection state in a network where the first user identity is located, and is in an RRC idle state or an RRC inactive state in a network where the second user identity is located, where the second information is used for requesting establishment of an RRC connection with the second user identity, the third information is used for indicating establishment of an RRC connection with the second user identity is completed, or the second information is used for requesting restoration of an RRC connection with the second user identity, and the third information is used for indicating restoration of an RRC connection with the second user identity is completed;

The receiving module is configured to receive fourth information from the first network device with the first user identity, where the fourth information is used to respond to the first information.

In a possible implementation, the receiver is configured to receive fourth information from the first network device with the first user identity by:

the fourth information is transmitted through an RRC reconfiguration message.

In a possible implementation manner, the processing module is configured to determine to send the first information to the first network device with the first user identity before the sending module sends the first information to the first network device with the first user identity.

In one possible implementation, the processing module is configured to determine to send the first information to the first network device with the first user identity by:

In one possible implementation of the method according to the invention,

The sending module is further configured to send fifth information to the first network device with the first user identity before sending the first information to the first network device with the first user identity, where the fifth information includes a random access preamble in a random access procedure corresponding to the second user identity;

The receiving module is further configured to receive, with the first user identity, sixth information from the first network device, where the sixth information is used to respond to the fifth information, and the sixth information includes the second time advance, where the second time advance is not equal to the first time advance, and the second network device is a network device where the terminal device resides with the second user identity.

In a possible implementation manner, the sending module is configured to send fifth information to the first network device in the first user identity in one or more of the following manners:

The fifth information includes an identification of the second user identity.

Or describing the embodiment as the sending module is configured to send fifth information to the first network device with the first user identity in one or more of the following manners:

The fifth information includes an identification of the second user identity.

In a possible implementation manner, the sending module is configured to send the first information to the first network device with the first user identity in one or more of the following manners:

Or describing the embodiment as the sending module is configured to send the first information to the first network device with the first user identity in one or more of the following manners:

In a possible implementation manner, the receiving module is configured to receive fourth information from the first network device with the first user identity in one or more of the following manners:

Or describing the embodiment as the receiving module being configured to receive fourth information from the first network device with the first user identity in one or more of the following ways:

Regarding the technical effects brought about by the fifth aspect or the various possible embodiments, reference may be made to the description of the technical effects of the first aspect or the corresponding embodiments.

In a sixth aspect, there is provided a communication device, for example the second communication device as described above. The second communication device is adapted to perform the method of the second aspect or any of the possible embodiments described above. In particular, the second communication device may comprise means for performing the method of the second aspect or any of the possible embodiments, e.g. comprising a processing means and a transceiver means. The transceiver module may include a transmitting module and a receiving module, which may be different functional modules or may be the same functional module, but may implement different functions. The second communication means is, for example, a communication device or a chip or other component provided in a communication device. Illustratively, the communication device is a first network device. The second communication device is exemplified as the first network device. For example, the transceiver module may also be implemented by a transceiver, and the processing module may also be implemented by a processor. Or the sending module may be implemented by a sender, and the receiving module may be implemented by a receiver, which may be different functional modules, or may be the same functional module, but may implement different functions. If the second communication means is a communication device, the transceiver is implemented, for example, by an antenna, a feeder, a codec, etc. in the communication device. Or if the second communication device is a chip provided in the communication apparatus, the transceiver (or the transmitter and the receiver) is, for example, a communication interface in the chip, which is connected to a radio frequency transceiver component in the communication apparatus to enable the transmission and reception of information through the radio frequency transceiver component. In the introduction of the sixth aspect, the second communication apparatus is a first network device, and the processing module, the transmitting module, and the receiving module are taken as examples to be described. Wherein,

The receiving module is configured to receive first information of a terminal device from a first user identity, where the first information includes second information and third information, the terminal device supports the first user identity and the second user identity, the terminal device is in an RRC connection state in a network where the first user identity is located, and is in an RRC idle state or an RRC inactive state in the network where the second user identity is located, where the second information is used for requesting establishment of an RRC connection with the second user identity, the third information is used for indicating establishment of an RRC connection with the second user identity is completed, or the second information is used for requesting restoration of an RRC connection with the second user identity, and the third information is used for indicating restoration of an RRC connection with the second user identity is completed;

the processing module is used for determining fourth information according to the first information, and the fourth information is used for responding to the first information;

And the sending module is used for sending the fourth information to the terminal equipment of the first user identity.

In a possible implementation manner, the sending module is configured to send the fourth information to the terminal device of the first user identity by:

the fourth information is transmitted through an RRC reconfiguration message.

In one possible implementation of the method according to the invention,

The receiving module is further configured to receive fifth information from a terminal device of a first user identity before receiving first information from the terminal device of the first user identity, where the fifth information includes a random access preamble in a random access procedure corresponding to the second user identity;

The sending module is further configured to send sixth information to the terminal device of the first user identity, where the sixth information is used to respond to the fifth information, and the sixth information includes the second time advance, where the second time advance is not equal to the first time advance, and the second network device is a network device where the terminal device resides with the second user identity.

In a possible implementation manner, the receiving module is configured to receive fifth information from the terminal device of the first user identity in one or more of the following manners:

The fifth information includes an identification of the second user identity.

The receiving module is configured to receive first information from a terminal device of a first user identity in one or more of the following manners:

In a possible implementation manner, the sending module is configured to send the fourth information to the terminal device of the first user identity by one or more of the following manners:

Regarding the technical effects brought about by the sixth aspect or the various possible embodiments, reference may be made to the description of the technical effects of the second aspect or the corresponding embodiments.

In a seventh aspect, a communication device is provided, for example the communication device is a third communication device as described above. The third communication device is adapted to perform the method of the third aspect or any of the possible embodiments described above. In particular, the third communication device may comprise means for performing the method of the third aspect or any of the possible embodiments, e.g. comprising a processing means and a transceiver means. The transceiver module may include a transmitting module and a receiving module, which may be different functional modules or may be the same functional module, but may implement different functions. The third communication means is, for example, a communication device or a chip or other component provided in a communication device. The communication device is illustratively a terminal device. The third communication means is exemplified below as a terminal device. For example, the transceiver module may also be implemented by a transceiver, and the processing module may also be implemented by a processor. Or the sending module may be implemented by a sender, and the receiving module may be implemented by a receiver, which may be different functional modules, or may be the same functional module, but may implement different functions. If the third communication means is a communication device, the transceiver is implemented, for example, by an antenna, feeder, codec, etc. in the communication device. Or if the third communication means is a chip provided in the communication device, the transceiver (or the transmitter and the receiver) is, for example, a communication interface in the chip, which is connected to a radio frequency transceiver component in the communication device to enable the transceiving of information by the radio frequency transceiver component. In the introduction of the seventh aspect, the third communication apparatus is a terminal device, and the processing module, the transmitting module, and the receiving module are taken as examples to be described. Wherein,

The sending module is configured to send a third message to a first network device with a first user identity, where the third message is a third message in a random access process corresponding to the second user identity, and the third message is used to request establishment, reestablishment, or recovery of RRC connection with the second user identity, where the terminal device supports the first user identity and the second user identity, the terminal device is in an RRC connection state in a network where the first user identity is located, and is in an RRC idle state or an RRC inactive state in a network where the second user identity is located;

the receiving module is configured to receive a fourth message from the first network device according to the first user identity, where the fourth message is a fourth message in a random access procedure corresponding to the second user identity, and the fourth message is used to respond to the third message.

In a possible implementation manner, the sending module is further configured to send, to the first network device, a fifth message in a random access procedure corresponding to the second user identity, where the fifth message is used to indicate that establishment, reestablishment, or restoration of an RRC connection with the second user identity is completed.

In a possible implementation manner, the processing module is further configured to determine, before the sending module sends the third message to the first network device with the first user identity, to send the third message to the first network device with the first user identity.

In a possible implementation manner, the processing module is configured to determine to send the third message to the first network device with the first user identity by:

In one possible implementation of the method according to the invention,

The sending module is further configured to send, before sending a third message to a first network device with a first user identity, first information to the first network device with the first user identity, where the first information includes a random access preamble in a random access procedure corresponding to the second user identity;

The receiving module is further configured to receive, with the first user identity, second information from the first network device, where the second information is used to respond to the first information, and the second information includes the second time advance, where the second time advance is not equal to the first time advance, and the second network device is a network device where the terminal device resides with the second user identity.

In a possible implementation manner, the sending module is configured to send first information to the first network device in the first user identity in one or more of the following manners:

The first information includes an identification of the second user identity.

Or describing the embodiment as the sending module is configured to send first information to the first network device with the first user identity in one or more of the following manners:

The first information includes an identification of the second user identity.

In a possible implementation manner, the sending module is configured to send the third message to the first network device with the first user identity in one or more of the following manners:

Or describing the embodiment as the sending module is configured to send the third message to the first network device with the first user identity in one or more of the following manners:

In a possible implementation manner, the receiving module is configured to receive, with the first user identity, a fourth message from the first network device by one or more of the following:

Or describing the embodiment as the receiving module being configured to receive a fourth message from the first network device with the first user identity in one or more of the following ways:

Regarding the technical effects brought about by the seventh aspect or the various possible embodiments, reference may be made to the description of the technical effects of the third aspect or the corresponding embodiments.

In an eighth aspect, a communication device is provided, for example the communication device is a fourth communication device as described above. The fourth communication device is configured to perform the method of the fourth aspect or any of the possible embodiments described above. In particular, the fourth communication device may comprise means for performing the method of the fourth aspect or any of the possible embodiments, e.g. comprising a processing means and a transceiver means. The transceiver module may include a transmitting module and a receiving module, which may be different functional modules or may be the same functional module, but may implement different functions. The fourth communication device is a communication apparatus, or is a chip or other component provided in the communication apparatus, for example. The communication device is illustratively a terminal device. The fourth communication device is a terminal device. For example, the transceiver module may also be implemented by a transceiver, and the processing module may also be implemented by a processor. Or the sending module may be implemented by a sender, and the receiving module may be implemented by a receiver, which may be different functional modules, or may be the same functional module, but may implement different functions. If the fourth communication means is a communication device, the transceiver is implemented, for example, by an antenna, a feeder, a codec, etc. in the communication device. Or if the fourth communication device is a chip provided in the communication apparatus, the transceiver (or the transmitter and the receiver) is, for example, a communication interface in the chip, which is connected to a radio frequency transceiver component in the communication apparatus to enable the transmission and reception of information through the radio frequency transceiver component. In the description of the eighth aspect, the description is continued taking the fourth communication device as a terminal device, and taking the processing module, the transmitting module, and the receiving module as examples. Wherein,

The receiving module is configured to receive a third message from a terminal device of a first user identity, where the third message is a third message in a random access process corresponding to the second user identity, and the third message is used to request to establish, reestablish, or restore RRC connection with the second user identity, where the terminal device supports the first user identity and the second user identity, the terminal device is in an RRC connection state in a network where the first user identity is located, and is in an RRC idle state or an RRC inactive state in a network where the second user identity is located;

the processing module is configured to determine a fourth message according to the third message, where the fourth message is a fourth message in a random access process corresponding to the second user identity, and the fourth message is used to respond to the third message;

And the sending module is used for sending the fourth message to the terminal equipment of the first user identity.

In a possible implementation manner, the receiving module is further configured to receive a fifth message in a random access procedure corresponding to the second user identity from the second user identity, where the fifth message is used to indicate that establishment, reestablishment or recovery of the RRC connection with the second user identity is completed.

In one possible implementation of the method according to the invention,

The receiving module is further configured to receive first information from a terminal device of a first user identity before receiving the first information from the terminal device of the first user identity, where the first information includes a random access preamble in a random access procedure corresponding to the second user identity;

the sending module is further configured to send second information to the terminal device of the first user identity, where the second information is used to respond to the first information, and the second information includes the second time advance, where the second time advance is not equal to the first time advance, and the second network device is a network device where the terminal device resides with the second user identity.

In a possible implementation manner, the receiving module is configured to receive the first information from the terminal device of the first user identity by one or more of the following manners:

The fifth information includes an identification of the second user identity.

In a possible implementation manner, the receiving module is configured to receive the third message from the terminal device of the first user identity in one or more of the following manners:

In a possible implementation manner, the sending module is configured to send the fourth message to the terminal device of the first user identity by one or more of the following manners:

Regarding the technical effects brought about by the eighth aspect or the various possible embodiments, reference may be made to the description of the technical effects of the fourth aspect or the corresponding embodiments.

In a ninth aspect, there is provided a communication device, for example a first communication device as described above. The communication device includes a processor. Optionally, a memory may be included for storing computer instructions. The processor and the memory are coupled to each other for implementing the method described in the first aspect or various possible embodiments. Or the first communication device may not include a memory, which may be external to the first communication device. Optionally, the first communication device may further comprise a communication interface for communicating with other devices or apparatuses. The processor, the memory and the communication interface are coupled to each other for implementing the method described in the first aspect or various possible embodiments. For example, when the processor executes the computer instructions stored in the memory, the first communication device is caused to perform the method of the first aspect or any one of the possible implementation manners described above. The first communication means is, for example, a communication device or a chip or other component provided in a communication device. The communication device is an exemplary terminal device.

Wherein, if the first communication means is a communication device, the communication interface is for example realized by a transceiver (or a transmitter and a receiver) in said communication device, for example realized by an antenna, a feeder, a codec, etc. in said communication device. Or if the first communication device is a chip arranged in the communication equipment, the communication interface is an input/output interface of the chip, such as an input/output pin, and the like, and the communication interface is connected with a radio frequency transceiver component in the communication equipment so as to realize the information transceiving through the radio frequency transceiver component.

In a tenth aspect, there is provided a communication device, for example a second communication device as described above. The communication device includes a processor. Optionally, a memory may be included for storing computer instructions. The processor and the memory are coupled to each other for implementing the method described in the second aspect or various possible embodiments. Or the second communication device may not include a memory, which may be external to the second communication device. Optionally, the second communication device may further comprise a communication interface for communicating with other devices or apparatuses. The processor, memory and communication interface are coupled to each other for implementing the method described in the second aspect or various possible embodiments. For example, when the processor executes the computer instructions stored in the memory, the second communication device is caused to perform the method of the second aspect or any one of the possible embodiments described above. The second communication means is, for example, a communication device or a chip or other component provided in a communication device. Illustratively, the communication device is a first network device.

Wherein if the second communication means is a communication device, the communication interface is for example realized by a transceiver (or a transmitter and a receiver) in said communication device, for example realized by an antenna, a feeder, a codec, etc. in said communication device. Or if the second communication device is a chip arranged in the communication equipment, the communication interface is an input/output interface of the chip, such as an input/output pin, and the like, and the communication interface is connected with a radio frequency transceiver component in the communication equipment so as to realize the information receiving and transmitting through the radio frequency transceiver component.

In an eleventh aspect, there is provided a communication device, for example a third communication device as described above. The communication device includes a processor. Optionally, a memory may be included for storing computer instructions. The processor and the memory are coupled to each other for implementing the method described in the third aspect or various possible embodiments. Or the third communication device may not include a memory, which may be external to the third communication device. Optionally, the third communication device may further comprise a communication interface for communicating with other devices or apparatuses. The processor, the memory and the communication interface are coupled to each other for implementing the method described in the third aspect or various possible embodiments. For example, when the processor executes the computer instructions stored in the memory, the third communication device is caused to perform the method of the third aspect or any one of the possible embodiments described above. The third communication means is, for example, a communication device or a chip or other component provided in a communication device. The communication device is an exemplary terminal device.

Wherein, if the third communication means is a communication device, the communication interface is for example realized by a transceiver (or a transmitter and a receiver) in said communication device, for example realized by an antenna, a feeder, a codec, etc. in said communication device. Or if the third communication device is a chip arranged in the communication equipment, the communication interface is an input/output interface of the chip, such as an input/output pin, and the like, and the communication interface is connected with a radio frequency transceiver component in the communication equipment so as to realize the information transceiving through the radio frequency transceiver component.

In a twelfth aspect, there is provided a communication device, for example a fourth communication device as described above. The communication device includes a processor. Optionally, a memory may be included for storing computer instructions. The processor and the memory are coupled to each other for implementing the method described in the fourth aspect or various possible embodiments. Alternatively, the fourth communication device may not include a memory, which may be external to the fourth communication device. Optionally, the fourth communication device may further include a communication interface for communicating with other devices or apparatuses. The processor, the memory and the communication interface are coupled to each other for implementing the method described in the fourth aspect or various possible embodiments. For example, when the processor executes the computer instructions stored in the memory, the second communication device is caused to perform the method of the fourth aspect or any one of the possible embodiments described above. The fourth communication device is a communication apparatus, or is a chip or other component provided in the communication apparatus, for example. Illustratively, the communication device is a first network device.

Wherein, if the fourth communication means is a communication device, the communication interface is for example realized by a transceiver (or a transmitter and a receiver) in said communication device, for example realized by an antenna, a feeder, a codec, etc. in said communication device. Or if the fourth communication device is a chip arranged in the communication equipment, the communication interface is an input/output interface of the chip, such as an input/output pin, and the like, and the communication interface is connected with a radio frequency transceiver component in the communication equipment so as to realize the information receiving and transmitting through the radio frequency transceiver component.

A thirteenth aspect provides a communication system comprising the communication device of the fifth aspect or the communication device of the ninth aspect, and comprising the communication device of the sixth aspect or the communication device of the tenth aspect.

A fourteenth aspect provides a communication system comprising the communication apparatus of the seventh aspect or the communication apparatus of the eleventh aspect, and comprising the communication apparatus of the eighth aspect or the communication apparatus of the twelfth aspect.

The communication system according to the thirteenth aspect and the communication system according to the fourteenth aspect may be the same communication system or may be different communication systems.

In a fifteenth aspect, there is provided a computer readable storage medium for storing computer instructions which, when run on a computer, cause the computer to perform the method of the first aspect or any one of the possible implementations described above.

In a sixteenth aspect, there is provided a computer readable storage medium for storing computer instructions which, when run on a computer, cause the computer to perform the method of the second aspect or any one of the possible implementations described above.

In a seventeenth aspect, there is provided a computer readable storage medium for storing computer instructions which, when run on a computer, cause the computer to perform the method of the third aspect or any one of the possible implementations described above.

In an eighteenth aspect, a computer readable storage medium is provided for storing computer instructions which, when run on a computer, cause the computer to perform the method as described in the fourth aspect or any one of the possible embodiments.

In a nineteenth aspect, there is provided a computer program product containing instructions for storing computer instructions which, when run on a computer, cause the computer to perform the method as described in the first aspect or any one of the possible implementations thereof.

In a twentieth aspect, there is provided a computer program product comprising instructions for storing computer instructions which, when run on a computer, cause the computer to perform the method as described in the second aspect or any one of the possible implementations thereof.

In a twenty-first aspect, there is provided a computer program product comprising instructions for storing computer instructions which, when run on a computer, cause the computer to perform the method as described in the third aspect or any one of the possible implementations thereof.

In a twenty-second aspect, there is provided a computer program product comprising instructions for storing computer instructions which, when run on a computer, cause the computer to perform the method as described in the fourth aspect or any one of the possible implementations thereof.

In the embodiment of the application, if the terminal equipment needs to establish connection with the network by the second user identity, the RRC connection between the second user identity and the network can be established through the RRC connection of the first user identity, so that the requirement of establishing the RRC connection between the second user identity and the network can be met, the time required by the process of establishing the RRC connection can be reduced, the time delay of a service is reduced, and the use experience of a user is improved.

Drawings

FIG. 1A is a schematic diagram of a dual card dual standby dual pass mode of a mobile phone;

FIG. 1B is a schematic diagram of a dual card dual standby single pass mode of a mobile phone;

Fig. 2A is a schematic diagram of switching two SIM cards in a mobile phone in a TDM manner;

Fig. 2B is a schematic diagram of only one SIM card in the handset maintaining an RRC connection with the network at one time;

Fig. 3A to 3D are schematic views of several application scenarios according to an embodiment of the present application;

fig. 4 is a flowchart of establishing an RRC connection between a terminal device and a base station;

fig. 5 is a flowchart of a first communication method according to an embodiment of the present application;

FIG. 6 is a flowchart of a second communication method according to an embodiment of the present application;

fig. 7 is a flowchart of a third communication method according to an embodiment of the present application;

fig. 8 is a flowchart of a fourth communication method according to an embodiment of the present application;

Fig. 9 is a schematic block diagram of a first terminal device according to an embodiment of the present application;

Fig. 10 is a schematic block diagram of a first network device according to an embodiment of the present application;

Fig. 11 is a schematic block diagram of a second terminal device according to an embodiment of the present application;

Fig. 12 is a schematic block diagram of a second first network device according to an embodiment of the present application;

FIG. 13 is a schematic block diagram of a communication device provided by an embodiment of the present application;

FIG. 14 is another schematic block diagram of a communication device provided by an embodiment of the present application;

FIG. 15 is yet another schematic block diagram of a communication device according to an embodiment of the present application;

Fig. 16 is a further schematic block diagram of a communication device according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application more apparent, the embodiments of the present application will be described in further detail with reference to the accompanying drawings.

In the following, some terms in the embodiments of the present application are explained for easy understanding by those skilled in the art.

1) Terminal devices, including devices that provide voice and/or data connectivity to a user, specifically, devices that provide voice to a user, or devices that provide data connectivity to a user, or devices that provide voice and data connectivity to a user. For example, may include a handheld device having wireless connectivity, or a processing device connected to a wireless modem. The terminal device may communicate with the core network via a radio access network (radio access network, RAN), exchange voice or data with the RAN, or interact voice and data with the RAN. The terminal device may include a User Equipment (UE), a wireless terminal device, a mobile terminal device, a device-to-device (D2D) terminal device, a vehicle-to-all (vehicle to everything, V2X) terminal device, a machine-to-machine/machine-type communication (M2M/MTC) terminal device, an internet of things (internet of things, ioT) terminal device, a subscriber unit (subscriber unit), a subscriber station (subscriber station), a mobile station (mobile station), a remote station, an Access Point (AP), a remote terminal (remote terminal), an access terminal (ACCESS TERMINAL), a user terminal (user terminal), a user agent (user agent), or a user equipment (user device), etc. For example, mobile telephones (or "cellular" telephones) computers with mobile terminal devices, portable, pocket, hand-held, computer-built mobile devices, and the like may be included. Such as personal communication services (personal communication service, PCS) phones, cordless phones, session initiation protocol (session initiation protocol, SIP) phones, wireless local loop (wireless local loop, WLL) stations, personal Digital Assistants (PDAs), and the like. But also limited devices such as devices with lower power consumption, or devices with limited memory capabilities, or devices with limited computing capabilities, etc. Examples include bar codes, radio frequency identification (radio frequency identification, RFID), sensors, global positioning systems (global positioning system, GPS), laser scanners, and other information sensing devices.

By way of example, and not limitation, in embodiments of the present application, the terminal device may also be a wearable device. The wearable device can also be called as a wearable intelligent device or an intelligent wearable device, and is a generic name for intelligently designing daily wear and developing wearable devices, such as glasses, gloves, watches, clothes, shoes, and the like, by applying wearable technology. The wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also can realize a powerful function through software support, data interaction and cloud interaction. The generalized wearable intelligent device includes full functionality, large size, and may not rely on the smart phone to implement complete or partial functionality, such as: smart watches or smart glasses, etc., and focus on only certain types of application functions, and need to be used in combination with other devices, such as smart phones, for example, various smart bracelets, smart helmets, smart jewelry, etc. for physical sign monitoring.

While the various terminal devices described above, if located on a vehicle (e.g., placed in a vehicle or mounted in a vehicle), may be considered as in-vehicle terminal devices, for example, also referred to as in-vehicle units (OBUs).

In the embodiment of the application, the terminal equipment can also comprise a relay. Or it is understood that all that is capable of data communication with a base station can be seen as a terminal device.

In the embodiment of the present application, the device for implementing the function of the terminal device may be the terminal device, or may be a device capable of supporting the terminal device to implement the function, for example, a chip system, and the device may be installed in the terminal device. In the embodiment of the application, the chip system can be composed of chips, and can also comprise chips and other discrete devices. In the technical solution provided in the embodiment of the present application, the device for implementing the function of the terminal is a terminal device, which is described in the technical solution provided in the embodiment of the present application.

2) A network device, for example comprising AN Access Network (AN) device, such as a base station (e.g. AN access point), may refer to a device in the access network that communicates over the air with a wireless terminal device via one or more cells, or a network device in a vehicle-to-everything (V2X) technology, for example, is a Road Side Unit (RSU). The base station may be configured to inter-convert the received air frames with IP packets as a router between the terminal device and the rest of the access network, which may include an IP network. The RSU may be a fixed infrastructure entity supporting V2X applications, which may exchange messages with other entities supporting V2X applications. The network device may also coordinate attribute management for the air interface. For example, the network device may include an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in a long term evolution (long term evolution, LTE) system or long term evolution advanced (long term evolution-advanced, LTE-a) system, or may also include a next generation node B (next generation node B, gNB) in a fifth generation mobile communication technology (the 5th generation,5G) new air interface (NR) system (also simply referred to as an NR system) system, or may also include a centralized unit (centralized unit, CU) and a Distributed Unit (DU) in a Cloud access network (Cloud radio access network, cloud RAN) system, and embodiments of the present application are not limited.

The network devices may also include core network devices including, for example, access and mobility management functions (ACCESS AND mobility management function, AMF), etc. In the embodiment of the present application, since the core network is not involved, the network devices are all access network devices unless specifically described later.

In the embodiment of the present application, the means for implementing the function of the network device may be the network device, or may be a means capable of supporting the network device to implement the function, for example, a chip system, and the apparatus may be installed in the network device. In the technical solution provided in the embodiment of the present application, the device for implementing the function of the network device is exemplified by the network device, and the technical solution provided in the embodiment of the present application is described.

3) In the embodiment of the present application, the "user identity" (for example, the first user identity or the second user identity, etc.) is a logic concept. For example, the "subscriber identity" may correspond to a SIM card, subscriber information, virtual SIM card, subscriber identity (e.g., international mobile subscriber identity (international mobile subscriber identity, IMSI), or temporary mobile subscriber identity (temporary mobile subscriber identity, TMSI), etc.). From the network side point of view, different "user identities" logically correspond to different communication entities served by the network side, e.g. UEs in 4G and 5G systems, e.g. a terminal device supporting two user identities, and can be seen as two communication entities for the network side. For another example, when the "user identity" corresponds to the SIM card or the subscriber information, the network side may identify two terminal devices supporting different SIM cards or different subscriber information as two different communication entities, and may also identify the same terminal device supporting multiple different SIM cards or multiple subscriber information as multiple different communication entities, even though in reality, the terminal device supporting multiple different SIM cards or multiple subscriber information is only one physical entity. In the embodiment of the application, the SIM card corresponding to the user identity will be mainly taken as an example for explanation.

For convenience of description, the SIM card and its evolution will be collectively referred to as a SIM card in the embodiments of the present application. For example, the SIM card may be an identification card of a user of a global system for mobile communications (global system for mobile communications, GSM) digital mobile phone, for storing an identification code and a key of the user, and supporting authentication of the user by the GSM system; for another example, the SIM card may also be a universal subscriber identity card (universal subscriber identity module, USIM), which may also be referred to as an upgrade SIM card.

4) Radio resource control (radio resource control, RRC) state, the terminal device has 3 RRC states: RRC connected state (connected state), RRC idle state (idle state), and inactive state (inactive state).

The "connected state" and "RRC connected state" are the same concept, and the two designations are interchangeable herein): the terminal device establishes an RRC connection with the network, and can perform data transmission.

Herein, "idle state" and "RRC idle state", are the same concept, and the two designations are interchangeable): the terminal device does not establish an RRC connection with the network and the base station does not store the context of the terminal device. If the terminal device needs to enter the RRC connected state from the RRC idle state, an RRC connection establishment procedure needs to be initiated.

Herein, "deactivation dynamics", "deactivation state", "RRC deactivation state" and "RRC deactivation state", are the same concept, and these several designations are interchangeable): the terminal device has previously entered the RRC connected state and then the base station releases the RRC connection, but the base station maintains the context of the terminal device. If the terminal device needs to re-enter the RRC connected state from the RRC inactive state, an RRC connection recovery procedure (alternatively referred to as an RRC connection re-establishment procedure) needs to be initiated. Compared with the RRC establishment process, the RRC recovery process has shorter time delay and smaller signaling overhead. However, the base station needs to save the context of the terminal device, which occupies the storage overhead of the base station.

5) The terms "system" and "network" in embodiments of the application may be used interchangeably. "at least one" means one or more, and "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a alone, a and B together, and B alone, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b, or c may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or plural.

And, unless otherwise indicated, the terms "first," "second," and the like according to the embodiments of the present application are used for distinguishing a plurality of objects, and are not used for limiting the size, content, order, timing, priority, importance, or the like of the plurality of objects. For example, the first information and the second information are only for distinguishing different information, and are not indicative of the difference in content, transmission order, priority, importance, or the like of the two information.

The embodiment of the application can be applied to various communication systems, such as: the LTE system, the LTE-a system, the NR system, or a future possible communication system is not particularly limited.

The foregoing has described some of the concepts related to the embodiments of the present application, and the following describes some of the features related to the embodiments of the present application.

More and more smartphones currently support the insertion of two subscriber identity module (subscriber identification module, SIM) cards simultaneously, for example, one SIM card for private services and the other SIM card for work; or one SIM card is used for data traffic and the other SIM card is used for voice traffic. Wherein, two SIM cards in a mobile phone can belong to the same mobile operator, and also can belong to different mobile operators; the two SIM cards can belong to the same system or can belong to different systems. The system includes NR, LTE, wideband code division multiple access (wideband code division multiple access, WCDMA), time division multiple access (time division multiple access, TDMA) 2000, or Global System for Mobile communications (global system for mobile communications, GSM), etc.

And the mobile phone with two SIM cards inserted is supported, and a dual-card dual-standby mode is also supported. The dual card dual standby mode handset can be generally set as follows: <1>, only SIM1 card on; <2>, only SIM2 card on; <3>, double-card open. Wherein, different cards support dual cards dual standby of different systems, also referred to as dual network dual standby or dual mode dual standby.

In addition, the concept is that the double cards are double-standby and double-pass or the double cards are double-standby and single-pass. By "single pass" or "double pass" is meant whether two cards in a cell phone can conduct services at the same time (e.g., two cards can make a call at the same time), if two cards in a cell phone can conduct services at the same time, the cell phone is double-card double-standby double-pass, and if two cards in a cell phone cannot conduct services at the same time, the cell phone is double-card double-standby single-pass. The simplest method for identifying single-pass and double-pass is to dial the number of the SIM2 card of a mobile phone by using the SIM1 card of the mobile phone, if the mobile phone can be accessed, the mobile phone is double-card double-standby double-pass, and if the mobile phone can not be accessed, the mobile phone is double-card double-standby single-pass.

Referring to fig. 1A, a schematic diagram of a dual-card dual-standby dual-pass mode of a mobile phone is shown. In the dual-card dual-standby dual-pass mode, two SIM cards use a set of transceivers, respectively. T in fig. 1A represents a transmission interface of the transceiver, and R represents a reception interface of the transceiver.

Referring to fig. 1B, a schematic diagram of a dual-card dual-standby single-pass mode of the mobile phone is shown. In the dual-card dual-standby single-pass mode, two SIM cards share a set of transceivers. T in fig. 1B represents a transmission interface of the transceiver, and R represents a reception interface of the transceiver.

In fig. 1A and 1B, a base station 1 represents a base station corresponding to a SIM1 card, and a base station 2 represents a base station corresponding to a SIM2 card.

From the technical realization point of view, two sets of chip sets can be used for realizing double-card double-pass double-standby. The mobile phone is provided with two sets of baseband chips, two sets of radio frequency chips and two sets of memories, which is equivalent to combining two complete mobile phone mainboards together and placing the two complete mobile phone mainboards in the same mobile phone shell. The implementation mode can support two SIM cards to work simultaneously, realizes a double-card double-standby double-pass mode, and does not need to be restarted or shut down when switching between the SIM cards. The problem with this implementation is that it costs almost twice as much as a normal cell phone, and the power consumption is often twice as much as a normal cell phone.

For dual-card dual-pass single-standby, there are two implementations currently. One solution is to keep both SIM cards connected to the RRC of the network, and to switch between the two SIM cards continuously in a time division multiplexed (time division multiplexing, TDM) manner, see fig. 2A. Specifically, a TDM pattern (pattern) may be specified, that is, a time in which the SIM1 card and the SIM2 card occupy the wireless/radio frequency module in one handset is specified. In order to support flexible TDM PATTERN, the base station can configure the working time of the mobile phone on the two SIM cards of the mobile phone according to the requirements of different mobile phones. For example, it may be specified that the time for the handset to operate on the SIM1 card of the handset is 4 minutes and the time for the handset to operate on the SIM2 card of the handset is 6 minutes, if the handset operates on the SIM1 card, then the handset will automatically switch to the SIM2 card when 4 minutes arrive. Since the time required for the switching is very short, it is not perceived to the user that the switching of the network occurs, which is equivalent to the realization that two cards stand by at the same time. If another SIM card has telephone access during the call of one SIM card, the missed call can be informed by sending a short message, and any call cannot be missed from the viewpoint of the user, unlike the double standby call.

However, the implementation manner of dual-card dual-pass single-standby is more suitable for periodic service or regular service, but is not suitable for bursty service. For example, TDM PATTERN is defined as a phone operating on SIM1 for 4 minutes and SIM2 for 6 minutes. When the mobile phone works on the SIM1 card for 2 minutes, the SIM2 card has burst service, and the wireless/radio frequency module needs to be used, so that the service communication of the SIM2 card cannot be carried out in a TDM mode because the service time of the SIM1 card is not reached, and the mobile phone can be switched to a network corresponding to the SIM2 card to carry out data transmission and reception of the SIM2 card only when the specified working time of the SIM1 card is reached. This brings a delay in SIM2 card communication, affecting the user experience.

Another implementation of dual card dual standby single pass is that only one SIM card remains RRC connected to the network at one time and the other SIM card does not remain RRC connected to the network device. That is, when the SIM1 card of the mobile phone is in the RRC connected state, the SIM2 card is in the RRC idle state or the RRC inactive state, refer to fig. 2B. If the SIM2 card has data to send or receive, the RRC connection of the SIM1 card needs to be cut off, and the RRC connection of the SIM2 card and the network needs to be established or restored. This process takes a long time, resulting in a longer delay of the traffic.

It can be seen that for the dual card dual standby single pass mode, the present solution has certain drawbacks. In view of this, a technical solution of the embodiment of the present application is provided. In the embodiment of the application, the terminal equipment is in an RRC connection state according to the first user identity, and is in an RRC idle state or an RRC inactive state according to the second user identity. If the connection between the second user identity and the network is required to be established, the first information corresponding to the second user identity can be sent to the first network equipment through the first user identity, so that the RRC connection between the second user identity and the network is assisted through the RRC connection of the first user identity, the requirement of the second user identity on the RRC connection with the network can be met, the time required by the RRC connection establishment process can be reduced, the speed of the second user identity on the RRC connection with the network is accelerated, the service time delay is reduced, and the use experience of a user is improved.

Fig. 3A is a first application scenario of the embodiment of the present application. In fig. 3A, one network device and one terminal device are included. The terminal device may support two or more SIM cards, fig. 3A taking the terminal device as an example supporting two SIM cards, i.e. the terminal device as an example supporting a first user identity and a second user identity. Wherein the network device operates in, for example, an evolved universal mobile telecommunications system terrestrial radio access (evolved UMTS terrestrial radio access, E-UTRA) system, or in an NR system, or in a next generation communication system or other communication system.

Because the terminal device in the embodiment of the present application may support two or more SIM cards, different SIM cards may access different network devices, so please refer to fig. 3B, which is a second application scenario in the embodiment of the present application. In fig. 3B, a network device 1, a network device 2 and a terminal device are included. Fig. 3B illustrates an example in which the terminal device supports two SIM cards, i.e. a first user identity and a second user identity. Wherein the terminal device is capable of communicating with the network device 1 with a first user identity and the terminal device is capable of communicating with the network device 2 with a second user identity. The network device 1 operates, for example, in an evolved universal mobile telecommunications system terrestrial radio access (evolved UMTS terrestrial radio access, E-UTRA) system, or in an NR system, or in a next generation communication system or other communication system. The network device 2 operates, for example, in an E-UTRA system, or in an NR system, or in a next generation communication system or other communication system. The network device 1 and the network device 2 may operate in the same communication system, e.g. both in an E-UTRA system, or the network device 1 and the network device 2 may also operate in different communication systems, e.g. the network device 1 operates in an E-UTRA system and the network device 2 operates in an NR system.

Of course, in the embodiment of the present application, one network device may serve multiple terminal devices, and fig. 3A and fig. 3B only take one of the terminal devices as an example. The terminal device may support two or more SIM cards, fig. 3A and 3B exemplify that the terminal device supports two SIM cards, a SIM1 card and a SIM2 card. In fig. 3B, the SIM1 card is connected to the network device 1, and the SIM2 card is connected to the network device 2.

In fig. 3A or fig. 3B, the first user identity and the second user identity are user identities supported by the same terminal device. The embodiment of the application also supports a scenario that the first user identity and the second user identity are the user identities supported by different terminal equipment.

Fig. 3C is a third application scenario of the embodiment of the present application. Fig. 3A includes a network device and two terminal devices, namely terminal device 1 and terminal device 2. Each of these two terminal devices may support one or more SIM cards, fig. 3C taking as an example that terminal device 1 and terminal device 2 each support one SIM card, e.g. terminal device 1 supports a first user identity and terminal device 2 supports a second user identity. Wherein the network device operates, for example, in an E-UTRA system, or in an NR system, or in a next generation communication system or other communication system.

Please refer to fig. 3D again, which is a fourth application scenario in an embodiment of the present application. In fig. 3D, network device 1, network device 2, terminal device 1, and terminal device 2 are included. Each of these two terminal devices may support one or more SIM cards, fig. 3D taking as an example that terminal device 1 and terminal device 2 each support one SIM card, e.g. terminal device 1 supports a first user identity and terminal device 2 supports a second user identity. Wherein the terminal device 1 is capable of communicating with the network device 1 with a first user identity and the terminal device 2 is capable of communicating with the network device 2 with a second user identity. The network device 1 and the network device 2 may operate in the same communication system, e.g. both in an E-UTRA system, or the network device 1 and the network device 2 may also operate in different communication systems, e.g. the network device 1 operates in an E-UTRA system and the network device 2 operates in an NR system.

The network device shown in any one of fig. 3A to 3D is, for example, a base station. The network device may correspond to different devices in different systems, for example, eNB in a 4G system, and access network device in 5G in a 5G system, for example, gNB. Of course, the technical solution provided by the embodiment of the present application may also be applied to a future mobile communication system, so that the network device shown in any one of fig. 3A to 3B may also correspond to the network device in the future mobile communication system. In any of fig. 3A to 3B, the network device is a base station, and actually, referring to the foregoing description, the network device may also be an RSU or other device.

Before describing the technical scheme provided by the embodiment of the application, a procedure of establishing RRC connection between UE and a network in an NR system is first described. Please refer to fig. 4, which is a flowchart of the process.

S401, the UE sends RRC establishment request (RRC setup request) information to the base station, and the base station receives the RRC establishment request information from the UE.

The RRC establishment request message may be a third message (Msg 3) in the random access procedure.

The RRC establishment request message may carry information such as an international mobile subscriber identity (international mobile subscriber identity, IMSI) or an S-temporary mobile subscriber identity (S-temporary mobile subscriber identity, S-TMSI), and a reason for establishing an RRC connection.

The UE may send an RRC setup request message to the base station to request establishment of an RRC connection while in an RRC idle state or an RRC inactive state.

In addition, since the S-TMSI of NR is 48 bits (bits) in length, only truncated 40 bits of S-TMSI may be carried in the RRC establishment request. Of course, for some special scenarios, such as RRC setup request message is a scenario for recovering RRC connection, the complete 48-bit S-TMSI may be carried in the RRC setup request.

S402, the base station sends an RRC establishment (RRC setup) message to the UE, and the UE receives the RRC establishment message from the base station.

The RRC setup message may be a fourth message (Msg 4) in the random access procedure.

In the system information block (systeminformation block, SIB) 1, an initial bandwidth part (BWP) is configured, and in the master information block (master information block, MIB), a bandwidth of a physical downlink control channel (physical downlink control channel, PDCCH) is also configured. If the bandwidth of the initial BWP configured by SIB1 is different from the bandwidth of the PDCCH configured by MIB, the UE switches to the BWP indicated by SIB1 after receiving the RRC setup message.

S403, the UE sends an RRC establishment completion (RRC setup complete) message to the base station, and the base station receives the RRC establishment completion message from the UE.

The RRC setup complete message may be a fifth message (Msg 5) in the random access procedure.

In the RRC setup message in S402, an setup configuration of the signaling radio bearer (signal radio bearer, SRB) 1 may be carried, and after the UE receives the setup configuration, the UE may set up SRB1, and then an RRC connection setup complete message in S403 may be sent through SRB 1.

If the truncated 40-bit S-TMSI is carried in the RRC connection setup request, the remaining 8-bit S-TMSI may be carried in the RRC connection setup complete message. In addition, in the RRC setup complete message, information of the selected public land mobile network (public land mobile network, PLMN), information of registered access and mobility management functions (ACCESS AND mobility management function, AMF), and non-access stratum (NAS) protocol data unit (protocol data unit, PDU) information, etc. may also be carried.

S404, the base station sends an initial UE information (initial UE message) message to the AMF, and the AMF receives the initial UE information message from the base station.

The base station strips the NAS information carried by the msg5 and sends the NAS information to the AMF through initial UE message information.

S405, the AMF sends a downlink NAS transmission (downlink NAS transport) message to the base station, and the base station receives the downlink NAS transmission message from the AMF.

S406, the base station sends a downlink information transfer (DL information transfer) message to the UE, and the UE receives the downlink information transfer message from the base station.

S407, the UE sends an uplink information transfer (UL information transfer) message to the base station, and the base station receives the uplink information transfer message from the UE.

S408, the base station sends an uplink NAS transmission (uplink NAS transport) message to the AMF, and the AMF receives the uplink NAS transmission message from the base station.

S404 to S408 are interaction procedures of some NAS information.

S409, the AMF sends an initial context establishment request (initial context setup request) message to the base station, and the base station receives the initial context establishment request message from the AMF.

The initial context establishment request message may carry PDU session context information, security key (security key), radio capability (radio capability) information of the UE, security capability (security capabilities) information of the UE, and the like.

S410, the base station sends a security mode command (security mode command) message to the UE, and the UE receives the security mode command message from the base station.

S411, the UE sends a security mode completion (security mode complete) message to the base station, and the base station receives the security mode completion message from the UE.

S412, the base station sends RRC configuration (RRC configuration) information to the UE, and the UE receives the RRC configuration information from the base station.

S413, the UE sends an RRC configuration completion (RRC configuration complete) message to the base station, and the base station receives the RRC configuration completion message from the UE.

S414, the base station sends an initial context establishment response (initial context setup response) message to the AMF, and the AMF receives the initial context establishment response message from the base station.

Fig. 4 illustrates a procedure for establishing an RRC connection between a UE and a network in an NR system, and a technical solution provided by an embodiment of the present application is described below with reference to the accompanying drawings.

It should be noted that, in the embodiments of the present application, a terminal device can be installed with one SIM card, which is considered that the terminal device supports one user identity, for example, a terminal device capable of installing two SIM cards can support two user identities, which is understood to be a one-to-one correspondence relationship between the SIM cards and the user identities. The terminal device is mainly taken as an example to support two user identities, and the two user identities are respectively called a first user identity and a second user identity. The first user identity is understood to be the user identity of the terminal equipment after the SIM1 card is installed, and the second user identity is understood to be the user identity of the terminal equipment after the SIM2 card is installed. In other possible embodiments, if the terminal device is capable of supporting installation of more than two SIM cards, the terminal device may also support more than two user identities, e.g. the terminal device may support three user identities, four user identities or more, and may register in more than two networks, where each user identity may register in one network. The embodiment of the application will be mainly described based on the terminal equipment supporting two user identities, and when the terminal equipment supports more than two user identities, the specific implementation of the embodiment can refer to the related description of the terminal equipment supporting two user identities, and some simple adaptation may be needed, but the embodiment of the application is also within the protection scope of the embodiment of the application.

Wherein when the user identity of the terminal device is the first user identity, the terminal device may be understood as a user from the perspective of the network side (from the perspective of the protocol, namely a terminal device, for example, referred to as the first user); when the user identity of the terminal device is the second user identity, the terminal device may be understood as a further user (e.g. referred to as second user) from the point of view of the network side. The terminal device may be registered with the first network with a first user identity and with the second network with a second user identity. In the embodiment of the application, the terminal equipment supports a user identity, and can also be described as that the terminal equipment has a user identity. Similarly, the terminal device supports two user identities, which may also be described as having two user identities.

It should be further noted that, in the embodiments of the present application, the "terminal device with the first user identity" may be understood as "the first user identity of the terminal device", where the content indicated by the two description modes is the same, and the two description modes may be interchanged. Similarly, the term "terminal device of the second user identity" is understood to mean "second user identity of the terminal device", and the content indicated by these two description modes is the same, and these two description modes may be interchanged.

An embodiment of the present application provides a first communication method, please refer to fig. 5, which is a flowchart of the method. In the following description, this method is taken as an example applied to the network architecture shown in fig. 3B. It should be noted that, the method may also be applied to the network architecture shown in fig. 3D, and in the following description, the terminal device supporting the first user identity is replaced by the first terminal device, and the terminal device supporting the second user identity is replaced by the second terminal device. The first terminal device is for example terminal device 1 in fig. 3D and the second terminal device is for example terminal device 2 in fig. 3D.

For ease of description, hereinafter, this method is exemplified by the network device and the terminal device. Since this embodiment is exemplified as applied to the network architecture shown in fig. 3B, the first network device described below may be the network device 1 in the network architecture shown in fig. 3B, the second network device described below may be the network device 2 in the network architecture shown in fig. 3B, and the terminal device described below may be the terminal device in the network architecture shown in fig. 3B.

S501, the terminal equipment sends first information to the first network equipment in the first user identity, and the first network equipment receives the first information from the terminal equipment in the first user identity.

The terminal equipment supports a first user identity and a second user identity, wherein the first network equipment is network equipment accessed by the terminal equipment according to the first user identity, and the terminal equipment resides in the second network equipment according to the second user identity. The first user identity and the second user identity may belong to the same mobile operator or to different mobile operators. The first user identity and the second user identity may belong to the same system, for example, the first user identity and the second user identity both belong to the LTE system, and both the first network device and the second network device may be enbs; or the first user identity and the second user identity may also belong to different standards, for example, the first user identity belongs to LTE standard, the second user identity belongs to NR standard, and the first network device may be an eNB, and the second network device may be a gNB.

In executing S501, the terminal device is in RRC connected state with the first user identity, and in RRC idle state or RRC inactive state with the second user identity. If the terminal device needs to enter the RRC connected state with the second user identity, for example, the terminal device needs to send uplink data with the second user identity, or the terminal device receives a paging message with the second user identity, etc., the terminal device needs to establish an RRC connection with the second network device with the second user identity if the terminal device is in the RRC idle state with the second user identity, or the terminal device needs to restore the RRC connection with the second network device with the second user identity if the terminal device is in the RRC inactive state with the second user identity.

The terminal device needs to perform random access to the second network device with the second user identity in order to establish an RRC connection with the second network device with the second user identity or to restore the RRC connection. In the embodiment of the application, the terminal equipment can assist the second user identity to carry out random access with the second network equipment by the first user identity, so that the time required by the terminal equipment to establish RRC connection with the second network equipment by the second user identity is reduced.

In this way, the terminal device generates the first information, but the terminal device sends the first information to the first network device with the first user identity, which corresponds to the first information being sent to the network by the first user identity in the RRC connected state. For example, the terminal device may generate the first information with the second user identity, or the terminal device may determine the first information corresponding to the second user identity through the first user identity, and generate the first information with the first user identity. For example, if the first terminal device supports the first user identity and the second terminal device supports the second user identity, if the first information is to be generated by the first terminal device, the second terminal device may send corresponding information corresponding to the second user identity to the first terminal device, so that the first terminal device may generate the first information.

The manner in which the terminal device generates the first information may be varied, and is not limited herein.

The first information is information corresponding to the second user identity. For example, the first information may include second information and third information. The second information may request establishment, reestablishment or restoration of the RRC connection with the second user identity. For example, the second information is used to request establishment of the RRC connection with the second user identity, and the third information is used to indicate completion of establishment of the RRC connection with the second user identity; or the second information is used for requesting to reestablish the RRC connection with the second user identity, and the third information is used for indicating that the establishment of the RRC connection with the second user identity is completed; or the second information is used for requesting to restore the RRC connection with the second user identity, and the third information is used for indicating that the RRC connection restoration with the second user identity is completed.

As an alternative implementation manner, the second information may be all or part of information included in Msg3 in the random access procedure corresponding to the second user identity. For example, msg3 is an RRC setup request (RRC setup request) message, or an RRC reestablishment request (RRC reestablishment request) message, or an RRC resume request (RRC resume request) message, etc. Wherein RRC setup request is a representation in a 4G system, if in a 5G system, msg3 can be represented as an RRC connection setup request (RRC connection setup request); RRC reestablishment request is a representation in a 4G system, if in a 5G system, msg3 can be represented as RRC connection reestablishment request (RRC connection reestablishment request); RRC resume request is a representation in a 4G system, if in a 5G system, msg3 can be represented as an RRC connection resume request (RRC connection resume request). Hereinafter, an RRC setup request message, an RRC reestablishment request message, and an RRC resume request message are mainly exemplified.

For example, if the random access procedure corresponding to the second user identity is used for initial access (INITIAL ACCESS) of the second user identity, the terminal device is in idle state with the second user identity, then Msg3 may be an RRC setup request message transmitted on the common control channel (common control channel, CCCH). In this case, msg3 may carry NAS UE identification information.

Or if the random access procedure corresponding to the second user identity is used for the second user identity to reestablish the RRC connection, msg3 may be an RRC reestablishment request message transmitted on the CCCH.

Or if the terminal device is in an inactive state with the second user identity, msg3 may be an RRC resume request message transmitted on CCCH or an RRC resume request 1 message transmitted on CCCH 1.

Whether Msg3 is an RRC setup request message, an RRC reestablishment request message, or an RRC resume request message, an identification of the terminal device may be included in Msg3, which may be used for conflict resolution of Msg 4. For example, for Msg3 in the random access procedure corresponding to the second user identity, the identification of the second user identity may be included. If the terminal device is in the RRC connected state with the second user identity, the identity of the second user identity may be an intra-cell radio network temporary identity (cell radio network temprory identifier, C-RNTI); if the terminal equipment is in RRC idle state with the second user identity, the identification of the second user identity can be S-TMSI or random number; if the terminal device is in an RRC inactive state with the second user identity, the identity of the second user identity may be an inactive cell radio network temporary identity (inactive radio network temprory identifier, I-RNTI), or may be a truncated I-RNTI.

As an alternative implementation manner, the third information may be all or part of information included in the Msg5 in the random access procedure corresponding to the second user identity. For example, msg5 is an RRC setup complete (RRC setup complete) message, or an RRC reestablishment complete (RRC reestablishment complete) message, or an RRC resume complete (RRC resume complete) message, etc. Wherein RRC setup complete is a representation in the 4G system, if in the 5G system, msg5 can be represented as RRC connection complete request (RRC connection setup complete); RRC reestablishment complete is a representation in a 4G system, if in a 5G system, msg5 can be represented as RRC connection reestablishment complete (RRC connection reestablishment complete); RRC resume complete is a representation in a 4G system, if in a 5G system, msg5 can be represented as RRC connection restoration complete (RRC connection resume complete). Hereinafter, an RRC setup complete message, an RRC reestablishment complete message, and an RRC resume complete message are mainly exemplified.

In addition, the implementation form of Msg3 and the implementation form of Msg5 should be corresponding. For example, if Msg3 is an RRC setup request message, msg5 is an RRC setup complete message; or if Msg3 is an RRC reestablishment request message, msg5 is an RRC reestablishment complete message; or Msg3 is an RRC resume request message, msg5 is an RRC resume complete message.

The first information may include all or part of information included in the Msg3 corresponding to the second user identity, and all or part of information included in the Msg5 corresponding to the second user identity, which is equivalent to sending the information included in the Msg3 and the information included in the Msg5 to the network device together, so that an interaction process between the terminal device and the network device is reduced. In addition, the first information comprises some configuration parameters of the second user identity of the terminal equipment, and the terminal equipment sends the first information to the network equipment together, so that the configuration process of the network equipment on the second user identity can be performed in advance, the terminal equipment is facilitated to realize communication with the second user identity as soon as possible, and the communication time delay is further reduced.

When Msg3 is implemented by different messages, it may also include some different information, and the corresponding Msg5 will also be correspondingly different. The following description is made.

1. Msg3 is an RRC setup request message.

The RRC setup request message is used to request establishment of an RRC connection, the signaling bearer of the RRC setup request message is signaling radio bearer (signal radio bearer, SRB) 0, the corresponding radio link control (radio link control, RLC) mode is transparent mode (TRANSPARENT MODE, TM), and the corresponding logical channel is CCCH.

The RRC establishment request message may include an identification of the terminal device and an establishment cause value. The identification of the terminal equipment is, for example, S-TMSI, or a random number, etc. For example, the RRC establishment request message is used for the second user identity to establish an RRC connection, the identity of the terminal device may be an identity of the second user identity.

The establishment cause value may indicate a cause of establishing the RRC connection. For example, the reasons for establishing the RRC connection may include emergency call (email), called response page (mt-Access), caller signaling (mo-signaling), caller Data service (mo-Data), caller voice service (mo-voicecall), caller audio service (mo-videocall), caller video service, caller short message service (mo-short MESSAGE SERVICE), caller multimedia priority service (multimedia priority services-priorityaccess), caller mission critical service (mission CRITICAL SERVICES-priorityaccess). Wherein mo-signaling may correspond to timing advance (TIMING ADVANCE, TA) update + attach (attach) and detach (detach) in non-access stratum (NAS) procedures.

The second information may comprise all or part of the information comprised by the Msg3, e.g. the Msg3 comprises an identification of the second user identity of the terminal device and the establishment cause value, and the second information may comprise an identification of the second user identity, or comprise the establishment cause value, or comprise an identification of the second user identity and the establishment cause value.

When Msg3 is an RRC setup request message, the fourth message (Msg 4) in the corresponding random access procedure is an RRC setup (RRC setup) message. Here, RRC setup is a representation in a 4G system, and Msg4 may be represented as an RRC connection setup (RRC connection setup) message in a 5G system.

The RRC establishment message is used for establishing SRB1, the signaling bearing of the RRC establishment message is SRB0, the corresponding RLC mode is TM, and the corresponding logical channel is CCCH. The RRC setup message includes content of the configuration of the radio bearer, i.e., includes an SRB1 configuration, an identification of the SRB and/or a packet data convergence layer protocol (PACKET DATA convergence protocol, PDCP) layer configuration is included in the SRB1 configuration, etc. The identification of the SRB is, for example, the ID of the SRB.

When Msg3 is an RRC establishment request message, msg5 in the corresponding random access procedure is an RRC establishment complete message.

The RRC connection setup complete message may be used to confirm successful completion of RRC connection setup. The signaling bearer corresponding to the RRC setup complete message is SRB1, the corresponding RLC mode is acknowledged mode (acknowledged mode, AM), and the corresponding logical channel is dedicated control channel (DEDICATED CONTROL CHANNEL, DCCH).

In the RRC setup complete message, the following information may be included:

Selecting a public land mobile network (public land mobile network, PLMN) Identity (SELECTED PLMN-Identity): a PLMN identification selected by the terminal equipment, wherein the PLMN is used for distinguishing mobile communication operators with different countries or regions;

Registration (registered) AMF: information of AMF registered by the terminal equipment;

Globally unique AMF ID type (guami-type): for indicating whether the globally unique AMF ID (global unique AMF IDENTIFIER, GUAMI) is local or mapped, if so, the representation GUAMI may be deduced by a 5G-globally unique temporary identity (5G globally unique temprory identity,5G GUTI); if mapped, then the representation GUAMI is mapped from an Evolved PACKET SYSTEM (EPS) GUTI, which is the identity used in the 4G system;

A list of single network slice selection support information (single network slice selection assistance information, s-NSSAI-list);

Dedicated NAS message (DEDICATED NAS-message): NAS means transmitting data between terminal equipment and core network equipment, and access network equipment transmits NAS information in a penetrating way, namely NAS information is not processed;

Next generation (ng) -5G-S-TMSI-value: the information related to the identity of the terminal device may be a complete S-TMSI value, or when a part of the S-TMSI value is carried in the RRC setup message (e.g. the value of the first part (part 1) of the S-TMSI), the remaining S-TMSI value (e.g. the value of the second part (part 2) of the S-TMSI) may be carried in the RRC setup complete message.

The third information may include all or part of the information included in the Msg 5. For example, the third information may include SELECTED PLMN-Identity; or the third information includes registered AMFs and guami-types; or the third information may include registration AMF, S-NSSAI-list and ng-5G-S-TMSI-value; or the third information may include SELECTED PLMN-Identity, registered AMF, guami-type, S-NSSAI-list, DEDICATED NAS-message, and ng-5G-S-TMSI-value, etc.

2. Msg3 is an RRC resume request message.

When Msg3 is an RRC resume request message or RRC resume request message 1, msg3 is used to resume a suspended RRC connection or to perform radio access network based notification area (RAN-based notification area, RAN) update.

The signaling bearing corresponding to the RRC recovery request message is SRB0, the corresponding logical channel is CCCH, and the corresponding RLC mode is TM. The signaling bearer corresponding to the RRC restoration request message 1 is SRB0, the corresponding logical channel is CCCH1, and the corresponding RLC mode is TM. In addition, both the RRC recovery request message and the RRC recovery request message 1 carry an identification of the terminal device, for example, an ID of the terminal device, but the lengths of the IDs of the terminal devices carried by the RRC recovery request message and the RRC recovery request message 1 are different. For example, the ID of the terminal device carried in the RRC recovery request message 1 is typically 40 bits (bits), and the ID of the terminal device carried in the RRC recovery request message is typically 24 bits.

The RRC recovery request message or RRC recovery request message 1 may include the following information:

restoration ID (resumeIdentity): an identity of a terminal device, which may be an identity used by the terminal device in an RRC inactive state, such as an I-RNTI, for obtaining a context of the terminal device stored at the network device;

Resume media access control (MEDIA ACCESS control, MAC) -I: the identifier is used for the network equipment to carry out identity authentication on the terminal equipment;

restoration cause value (resumeCause): for indicating the reason for RRC connection recovery.

The recovery cause value for indicating the RRC connection recovery is the same as the establishment cause value of the RRC connection establishment carried by the RRC establishment request, and will not be described herein.

The second information may include all or part of the information included in the Msg3, e.g., the Msg3 includes resumeIdentity, resumeMAC-I and resumeCause, then the second information may include resumeIdentity, or resumeMAC-I and resumeCause, or resumeIdentity, resumeMAC-I and resumeCause, etc.

When Msg3 is an RRC resume request message, msg4 in the corresponding random access procedure is an RRC resume (RRC resume) message. Here, RRC resume is a representation in a 4G system, and Msg4 may be represented as an RRC connection resume (RRC connection resume) message in a 5G system.

The RRC resume message is used for resuming the suspended RRC connection, the corresponding signaling bearer is SRB1, the corresponding RLC mode is AM, and the corresponding logical channel is DCCH. In the RRC recovery message, a configuration of the radio bearer, a measurement related configuration, and a security key related configuration may be included.

When Msg3 is the RRC resume request message, msg5 in the corresponding random access procedure is the RRC resume complete message.

The RRC resume complete message may be used to confirm that RRC connection resume is successfully completed, where the signaling bearer corresponding to the RRC resume complete message is SRB1, the corresponding RLC mode is AM, and the corresponding logical channel is DCCH.

In the RRC recovery complete message, the following information may be included:

DEDICATEDNAS-Message: a dedicated NAS message for transmitting some NAS data;

SELECTEDPLMN-Identity: the selected PLMN Identity may be the same as SELECTEDPLMN-Identity carried in the RRC setup complete message;

Uplink transmission direct current list (uplinkTxDirectCurrentList): for indicating the current serving cell (cell), including an associated carrier bandwidth indication, etc.

The third information may include all or part of the information included in the Msg 5. For example, msg5 includes DEDICATEDNAS-Message, selectedPLMN-Identity and uplinkTxDirectCurrentList, then the third information may include SELECTEDPLMN-Identity; or the third information includes DEDICATEDNAS-Message and uplinkTxDirectCurrentList; or the third information includes DEDICATEDNAS-Message, selectedPLMN-Identity and uplinkTxDirectCurrentList, etc.

3. Msg3 is an RRC reestablishment request message.

The signaling bearing corresponding to the RRC reestablishment request message is SRB0, the corresponding RLC mode is TM, and the corresponding logical channel is CCCH.

The RRC reestablishment request message may include the following information:

ue-Identity: the identity of the terminal device that reestablishes the RRC connection, where the identity of the terminal device that reestablishes the RRC connection may include three parts: C-RNTI, physical cell identity (physCellId), short (short) MAC-I for identifying identity of the terminal device;

Reconstruction cause value (reestablishmentCause): the cause value indicating RRC reestablishment may be, in particular, a reconfiguration failure, a handover failure, or other failure cause.

The second information may include all or part of the information included in the Msg3, for example, the Msg3 includes ue-Identity and a reconstruction reason value, and the second information may include ue-Identity, or a reconstruction reason value, or both.

When Msg3 is the RRC reestablishment request message, msg4 in the corresponding random access procedure is the RRC reestablishment (RRC reestablishment) message. Wherein RRC reestablishment is a representation in a 4G system, msg4 can be represented as an RRC connection reestablishment (RRC connection reestablishment) message in a 5G system.

The RRC reestablishment message is used for reestablishing SRB1, the signaling bearing used for transmitting the RRC reestablishment message is SRB1, the corresponding RLC mode is AM, and the corresponding logical channel is DCCH. The RRC reestablishment message may include parameters related to updating the security key.

When Msg3 is the RRC reestablishment request message, msg5 in the corresponding random access procedure is the RRC reestablishment complete message.

The RRC reestablishment complete message is used to confirm successful completion of RRC connection reestablishment. The signaling bearing corresponding to the RRC reestablishment completion message is SRB1, the corresponding RLC is AM, and the corresponding logical channel is DCCH. Currently, there are only some inherent coding indications in RRC reestablishment complete messages, and no special field indications. But the third information may include all or part of the information included in the RRC reestablishment complete message regardless of what contents the RRC reestablishment complete message includes.

For example, the terminal device may add the first information to a message, e.g. referred to as a first combined message, corresponding to the first combined message comprising the first information. Of course, the message may have other names, and the names of the messages do not limit the messages themselves. The terminal device may send the first combined message to the first network device with the first user identity, and the first network device receives the first combined message, i.e. the first information. The first information includes second information and third information, if the second information includes all or part of the information of the Msg3 and the third information includes all or part of the information of the Msg5, then the information included in the Msg3 and the information included in the Msg5 are added to one message, and if there is a repeated part in the information included in the Msg3 and the information included in the Msg5, only one part needs to be included in the first combined message for the repeated part. By the method, redundant information in the first combined message can be reduced, the overhead of the first combined message is reduced, and the success rate of effective information transmission can be improved.

For example, if the Msg3 corresponding to the second user identity includes the identifier of the second user identity, and the Msg5 corresponding to the second user identity also includes the identifier of the second user identity, two second user identity identifiers need not be included in the first combined message, but only one second user identity identifier need be included. The third information comprises part of the information of Msg5 if the identity of the second user is comprised by the second information, or of Msg3 if the identity of the second user is comprised by the third information.

Or the terminal device may put the second information and the third information in different messages, and send the second information and the third information to the first network device with the first user identity, which is also equivalent to the terminal device sending the first information to the first network device with the first user identity. For example, the terminal device may send, to the first network device, msg3 corresponding to the second user identity and Msg5 corresponding to the second user identity with the first user identity, where Msg3 corresponding to the second user identity includes the second information, and Msg5 corresponding to the second user identity includes the third information. The first network device receives the Msg3 corresponding to the second user identity and the Msg5 corresponding to the second user identity, and thus obtains the first information. The terminal equipment can send Msg3 corresponding to the second user identity and Msg5 corresponding to the second user identity to the first network equipment at the same time by using the first user identity; or the terminal equipment can also send Msg3 corresponding to the second user identity to the first network equipment with the first user identity, and then send Msg5 corresponding to the second user identity to the first network equipment; or the terminal device may send the Msg5 corresponding to the second user identity to the first network device with the first user identity, and then send the Msg3 corresponding to the second user identity to the first network device.

The second information and the third information may be different, and the second information and the third information are put into two messages to be sent, so that the first network device or the subsequent second network device can more easily distinguish the second information and the third information.

As an alternative embodiment, before the terminal device sends the first information to the first network device with the first user identity, the terminal device may determine that the first information may be sent to the first network device with the first user identity. That is, determining that the second user identity related information may be sent to the network in the first user identity. The determination mode of the terminal device can be various, and is described below by way of example.

A. The first way of determination.

The terminal device may determine that the first information may be transmitted to the first network device with the first user identity based on a difference between the first time advance (TIMING ADVANCE, TA) and the second TA being less than or equal to a first threshold. The first TA is a TA corresponding to the terminal equipment communicating in the first network with the first user identity, and the second TA is a TA corresponding to the terminal equipment communicating in the second network with the second user identity. The first network is a network in which the first network device is located, and the second network is a network in which the second network device is located. The second TA may be configured by the second network device for the second user identity.

The difference between the first TA and the second TA is less than or equal to the first threshold, which is understood to be equal to or similar to the first TA and the second TA (if the first threshold is 0, the first TA is equal to the second TA). The first threshold may be configured by the first network device, or by the second network device, or determined by the terminal device itself, or specified by a protocol. If the first TA and the second TA are equal or similar, the terminal equipment can be basically ensured to correctly receive the information related to the second user identity by the first user identity. To make the first TA and the second TA equal or similar, for example, one way is for the first network device and the second network device to co-site. Of course, other ways of making the first TA and the second TA equal or similar are possible in addition to this.

Or the first TA and the second TA may be neither equal nor similar, for example, the difference between the first TA and the second TA may be greater than the first threshold, as long as both the first network device and the second network device know the first TA and the second TA, and the first TA and the second TA are considered when sending information, so that the terminal device can correctly receive information related to the second user identity with the first user identity.

In a first determination mode, the terminal device may obtain a first TA and a second TA. For example, if the first TA and the second TA are equal, the terminal device may know in advance that the first TA and the second TA are equal, and for the first TA, since the terminal device is in the RRC connected state with the first user identity, it may be considered that the terminal device has already acquired the first TA. The terminal device may not need to obtain the second TA if the terminal device also knows that the first TA and the second TA are equal. Or even if the first TA and the second TA are equal, the terminal device may first obtain the second TA since the terminal device does not know that the first TA and the second TA are equal. If the first TA and the second TA are not equal (e.g., the first TA and the second TA are similar, or the first TA and the second TA are not similar), the terminal device may first obtain the second TA.

One way for the second TA, e.g., the terminal device, to acquire it is through the second network device.

For example, the second network device may carry the second TA in the release message when releasing the terminal device of the second user identity. The terminal device may acquire the second TA when the second user identity is released.

Or the terminal device may also obtain the second TA through other information from the second network device. For example, before the terminal device sends the first information to the first network device in the first user identity, the terminal device may also send fifth information to the first network device in the first user identity, where the fifth information may include a random access preamble (preamble) in a random access procedure corresponding to the second user identity. For example, the terminal device may send, to the first network device, a first message (Msg 1) in a random access procedure corresponding to the second user identity with the first user identity, where Msg1 may be regarded as a preamble.

After the first network device receives the fifth information, the fifth information may be forwarded to a second network device where the second user identity resides, where the second network device receives the fifth information from the first network device. The second network device may generate sixth information from the fifth information and transmit the sixth information to the first network device, and the first network device receives the sixth information from the second network device. The sixth information is used for responding to the fifth information, for example, the sixth information may include all or part of information included in the second message (Msg 2) in the random access procedure corresponding to the second user identity. The second TA may be included in the sixth information. For example, the second network device may send Msg2 in the random access procedure corresponding to the second user identity to the first network device, where Msg2 includes sixth information, and the first network device may receive the Msg2 from the second network device.

If the terminal device is to send fifth information to the first network device with the first user identity, the fifth information corresponds to the second user identity, and the terminal device also sends information related to the first user identity to the first network device with the first user identity, for example, if the terminal device performs random access with the first user identity, the terminal device also sends Msg1 corresponding to the first user identity to the first network device with the first user identity. The information corresponding to the first user identity and the information corresponding to the second user identity can be sent by the first user identity, and if the information is not distinguished, response errors of the first network equipment can be caused. Therefore, in the embodiment of the application, the terminal equipment can distinguish the fifth information from the preamble corresponding to the first user identity through the physical resource; or the fifth information and the preamble corresponding to the first user identity can be distinguished through the identification of the user identity; or the preamble corresponding to the fifth information and the first user identity can be distinguished through physical resources, or the preamble corresponding to the first user identity can be distinguished through the identification of the user identity.

If the terminal device distinguishes the fifth information and the preamble corresponding to the first user identity through the physical resource, in one implementation manner, the terminal device sends the fifth information to the first network device through the first user identity and through the fourth physical resource. The fourth physical resource is different from the third physical resource, and the third physical resource is used for sending the preamble corresponding to the first user identity to the first network device by the first user identity.

The physical resources include, for example, channels carrying information, or include coding schemes for channels carrying information and information. Of course, the physical resources may also include other resources. For example, the physical resource includes a channel carrying information, the terminal device may send fifth information to the first network device in the first user identity and in the fourth channel, where the terminal device uses a third channel when sending a preamble corresponding to the first user identity to the first network device, where the third channel and the fourth channel are different. In this way, the first network device is enabled to ascertain the correspondence between the received information and the user identity.

If the terminal device distinguishes the fifth information from the preamble corresponding to the first user identity through the identifier of the user identity, in one implementation, the fifth information may include the identifier of the second user identity, for example, the ID of the second user identity. And when the terminal equipment sends the preamble corresponding to the first user identity to the first network equipment by the first user identity, the terminal equipment can also comprise the identification of the first user identity.

If the terminal device is distinguished when sending the fifth information with the first user identity and sending the preamble corresponding to the first user identity, the terminal device may also be distinguished when receiving the sixth information from the first network device with the first user identity and receiving the Msg2 corresponding to the first user identity. Or even if the terminal device does not distinguish between transmitting the fifth information with the first user identity and transmitting the preamble corresponding to the first user identity, the terminal device may distinguish between receiving the sixth information from the first network device with the first user identity and receiving the Msg2 corresponding to the first user identity. Or the terminal equipment is distinguished when the fifth information is sent by the first user identity and the preamble corresponding to the first user identity is sent, and the terminal equipment is not distinguished when the sixth information from the first network equipment is received by the first user identity and the Msg2 corresponding to the first user identity is received. Or the terminal equipment is not distinguished when the fifth information is sent by the first user identity and the preamble corresponding to the first user identity is sent, and the terminal equipment is not distinguished when the sixth information from the first network equipment is received by the first user identity and the Msg2 corresponding to the first user identity is received. The following describes how the terminal device distinguishes between receiving the sixth information from the first network device in the first user identity and receiving the Msg2 corresponding to the first user identity.

For example, the terminal device may distinguish, through the physical resource, msg2 corresponding to the sixth information and the first user identity; or the sixth information and the Msg2 corresponding to the first user identity may be distinguished by the identity of the user, for example, the sixth information may include the identity of the second user identity, for example, the ID of the second user identity; or the Msg2 corresponding to the sixth information and the first user identity can be distinguished through physical resources, and the Msg2 corresponding to the sixth information and the first user identity can be distinguished through the identification of the user identity.

If the terminal device distinguishes the sixth information from the Msg2 corresponding to the first user identity by means of the physical resource, in one embodiment the terminal device receives the sixth information from the first network device in the first user identity and in the fourth physical resource. Wherein the fourth physical resource is different from the third physical resource, and the third physical resource is configured to receive, with the first user identity, an Msg2 corresponding to the first user identity from the first network device.

If the terminal device distinguishes the sixth information from the Msg2 corresponding to the first user identity through the identifier of the user identity, in one implementation manner, the sixth information may include the identifier of the second user identity. And the Msg2 corresponding to the first user identity received by the terminal device in the first user identity from the first network device may also include an identifier of the first user identity.

The distinguishing mode adopted by the terminal equipment when distinguishing the preamble corresponding to the fifth information and the first user identity may be the same or different from the distinguishing mode adopted by the terminal equipment when distinguishing the Msg2 corresponding to the sixth information and the first user identity. For example, if the terminal device distinguishes the fifth information and the preamble corresponding to the first user identity through the physical resource, the terminal device may continue to distinguish the sixth information and the Msg2 corresponding to the first user identity through the physical resource, or the terminal device may also distinguish the sixth information and the Msg2 corresponding to the first user identity through the identifier of the user identity.

B. The second way of determination.

The terminal device may determine to initiate a random access procedure of the second user identity with the first user identity to the first network device based on the first indication information from the second network device.

Before S501, the second network device releases the terminal device of the second user identity. For example, the second network device sends an RRC release message to the terminal device of the second user identity, the RRC release message being used to release the terminal device of the second user identity. After receiving the RRC release message with the second user identity, the terminal device may enter an RRC inactive state or an RRC idle state. As an alternative manner, the release message may further include first indication information, where the first indication information may indicate that the second user identity may perform random access through a channel corresponding to the first user identity, or the first indication information may indicate that a random access procedure of the second user identity may be initiated to the first network device by the first user identity. The terminal device may thus determine that the first information corresponding to the second user identity can be sent to the first network device with the first user identity, or that the random access procedure of the second user identity can be initiated to the first network device with the first user identity.

In the first determination manner, if the terminal device is to send the fifth information to the first network device with the first user identity, the terminal device may distinguish the fifth information from the preamble corresponding to the first user identity. Similarly, if the terminal device is to send the first information to the first network device with the first user identity, where the first information corresponds to the second user identity, the terminal device will send the information corresponding to the first user identity to the first network device with the first user identity, for example, if the terminal device performs random access with the first user identity, the terminal device will also send Msg3 or Msg5 corresponding to the first user identity to the first network device with the first user identity. The information corresponding to the first user identity and the information corresponding to the second user identity can be sent by the first user identity, and if the information is not distinguished, response errors of the first network equipment can be caused. Therefore, in the embodiment of the present application, the terminal device may also distinguish the first information from the information corresponding to the first user identity.

In the embodiment of the present application, the distinguishing manner of the terminal device may include one or more of the following: the first information and the information corresponding to the first user identity are distinguished through SRB, the first information and the information corresponding to the first user identity are distinguished through a logic channel, the first information and the information corresponding to the first user identity are distinguished through the identification of the user identity, or the first information and the information corresponding to the first user identity are distinguished through physical resources. For example, the terminal device may distinguish the first information from information corresponding to the first user identity through the SRB; or the terminal equipment can distinguish the first information from the information corresponding to the first user identity through the logic channel and the user identity; or the terminal equipment can distinguish the first information from the information corresponding to the first user identity through SRB, a logic channel and the user identity; or the terminal device may distinguish the first information from the information corresponding to the first user identity through the SRB, the logical channel, the physical resource, and the identity of the user, and so on.

If the terminal device distinguishes the first information and the information corresponding to the first user identity through the SRB, in one embodiment, the terminal device sends the first information to the first network device in the first user identity and in the second SRB. The second SRB is different from the first SRB, and the first SRB is used for sending information corresponding to the first user identity to the first network equipment by the first user identity.

If the terminal device distinguishes the first information and the information corresponding to the first user identity through the logical channel, in one implementation, the terminal device sends the first information to the first network device through the first user identity and through the second logical channel corresponding to the first SRB. The second logical channel is different from a first logical channel corresponding to the first SRB, and the first logical channel is used for sending information corresponding to the first user identity to the first network device by the first user identity.

If the terminal device distinguishes the first information from the information corresponding to the first user identity through the identity of the user, in one implementation, the first information may include the identity of the second user identity. And when the terminal equipment sends the information corresponding to the first user identity to the first network equipment by the first user identity, the terminal equipment can also comprise the identification of the first user identity.

If the terminal device distinguishes the first information and the information corresponding to the first user identity through the physical resource, in one implementation, the terminal device sends the first information to the first network device with the first user identity and with the second physical resource. The second physical resource is different from the first physical resource, and the first physical resource is used for sending information corresponding to the first user identity to the first network device by the first user identity. For an explanation of physical resources, reference may be made to the foregoing.

S502, the first network device forwards the first information to the second network device, and the second network device receives the first information from the first network device.

If in S501 the terminal device sends the first combined message to the first network device with the first user identity, then in S502 the first network device may forward the first combined message to the second network device, which may also receive the first combined message from the first network device. Or if in S501 the terminal device sends two messages to the first network device with the first user identity, the two messages carrying the second information and the third information, respectively, then in S502 the first network device may forward the two messages to the second network device, which may receive the two messages from the first network device. For example, in S501, the terminal device sends Msg3 and Msg5 corresponding to the second user identity to the first network device with the first user identity, and in S502, the first network device may forward Msg3 and Msg5 corresponding to the second user identity to the second network device, and the second network device may receive Msg3 and Msg5 corresponding to the second user identity from the first network device.

S503, the second network device sends fourth information to the first network device, and the first network device receives the fourth information from the second network device. The fourth information is used to respond to the first information, and thus the fourth information is information corresponding to the second user identity of the terminal device.

After the second network device receives the first information, response information of the first information may be generated, that is, fourth information is generated. Since the second network device is the first information received from the first network device, the second network device may also send the fourth information to the first network device.

The first information includes the second information and the third information, and then the fourth information generated by the second network device may include response information of the second information or may include response information of the third information. The response information of the second information, for example, includes all or part of information included in the Msg4 corresponding to the second user identity, and the response information of the third information, for example, includes all or part of information included in the RRC reconfiguration (RRC reconfiguration) message corresponding to the second user identity.

For example, the second network device may add the fourth information to a message, e.g. referred to as a second combined message, corresponding to the second combined message comprising the fourth information. Of course, the message may have other names, and the names of the messages do not limit the messages themselves. For example, one implementation of the second combined message is that the second combined message is specifically an RRC reconfiguration message. Of course the implementation of the second combined message is not limited thereto. The second network device may send the second combined message to the first network device, which receives the second combined message, i.e. the fourth information. The fourth information includes response information of the second information and response information of the third information, if the response information of the second information includes all or part of information of the Msg4, and the response information of the third information includes all or part of information of the RRC reconfiguration message, then the information included in the Msg4 and the information included in the RRC reconfiguration message are to be added to one message, and if there is a duplicate part in the information included in the Msg4 and the information included in the RRC reconfiguration message, only one part needs to be included in the second combined message for the duplicate part. By the method, redundant information in the second combined message can be reduced, the overhead of the second combined message is reduced, and the success rate of effective information transmission can be improved.

For example, the Msg4 corresponding to the second user identity includes the identifier of the second user identity, and the RRC reconfiguration message corresponding to the second user identity also includes the identifier of the second user identity, so that two second user identity identifiers need not be included in the second combined message, but only one second user identity identifier need be included. The third information comprises part of the RRC reconfiguration message if the identity of the second user identity is comprised by the response information of the second information, or the Msg4 if the identity of the second user identity is comprised by the response information of the third information.

Or the second network device may put the response information of the second information and the response information of the third information into different messages, and send the response information of the second information and the response information of the third information to the first network device, which is equivalent to that the second network device sends the fourth information to the first network device. For example, the second network device may send, to the first network device, msg4 corresponding to the second user identity and an RRC reconfiguration message corresponding to the second user identity, where Msg4 corresponding to the second user identity includes response information of the second information, and where the RRC reconfiguration message corresponding to the second user identity includes response information of the third information. The first network device receives the Msg4 corresponding to the second user identity and the RRC reconfiguration message corresponding to the second user identity, and thus obtains fourth information. The second network device may send Msg4 corresponding to the second user identity and an RRC reconfiguration message corresponding to the second user identity to the first network device at the same time; or the second network device may first send Msg3 corresponding to the second user identity to the first network device, and then send an RRC reconfiguration message corresponding to the second user identity to the first network device; or the second network device may first send the RRC reconfiguration message corresponding to the second user identity to the first network device, and then send Msg3 corresponding to the second user identity to the first network device.

The response information of the second information and the response information of the third information may have different roles, and the response information of the second information and the response information of the third information are put into two messages to be sent, so that the first network device or the subsequent terminal device can more easily distinguish the response information of the second information and the response information of the third information.

S504, the first network equipment sends the fourth information to the terminal equipment of the first user identity, and the terminal equipment receives the fourth information from the first network equipment with the first user identity.

If the first network device receives a second combined message corresponding to the second user identity from the second network device in S503, the first network device may send the second combined message to the terminal device of the first user identity in S504, and the terminal device may receive the second combined message from the first network device with the first user identity.

Or if in S503 the first network device receives two messages corresponding to the second user identity from the second network device, where the two messages respectively carry the response information of the second information and the response information of the third information, in S504 the first network device may send the two messages to the terminal device, and the terminal device receives the two messages from the first network device with the first user identity, so that the fourth information is obtained. For example, in S503, the first network device receives the Msg4 and RRC reconfiguration message corresponding to the second user identity from the second network device, and in S504, the first network device may send the Msg4 and RRC reconfiguration message corresponding to the second user identity to the terminal device of the first user identity, and the terminal device may receive the Msg4 and RRC reconfiguration message corresponding to the second user identity from the first network device with the first user identity.

The terminal device is the fourth information received in the first user identity, but the fourth information corresponds to the second user identity, so that the terminal device can use the fourth information for the second user identity, which corresponds to the terminal device obtaining the fourth information in the second user identity.

If in S504 the terminal device receives the second combined message from the first network device with the first user identity, the terminal device may use the second combined message for the second user identity.

Or if in S504 the terminal device receives two messages from the first network device in the first user identity, the two messages including response information of the second information and response information of the third information, the terminal device may use the response information of the second information and the response information of the third information included in the two messages for the second user identity. For example, in S504, the terminal device receives, with the first user identity, the Msg4 and RRC reconfiguration message corresponding to the second user identity from the first network device, and then the terminal device may use the Msg4 and RRC reconfiguration message corresponding to the second user identity for the second user identity.

If the terminal device is distinguished when transmitting the first information with the first user identity and when transmitting the information corresponding to the first user identity, the terminal device may also be distinguished when receiving the fourth information from the first network device with the first user identity and when receiving the information corresponding to the first user identity. Or even if the terminal device does not distinguish between transmitting the first information with the first user identity and transmitting the information corresponding to the first user identity, the terminal device may distinguish between receiving the fourth information from the first network device with the first user identity and receiving the information corresponding to the first user identity. Or the terminal device is distinguished when the first information is sent by the first user identity and the information corresponding to the first user identity is sent, and the terminal device is not distinguished when the fourth information from the first network device is received by the first user identity and the information corresponding to the first user identity is received. Or the terminal device does not distinguish between the sending of the first information with the first user identity and the sending of the information corresponding to the first user identity, and the terminal device does not distinguish between the receiving of the fourth information from the first network device with the first user identity and the receiving of the information corresponding to the first user identity. The following describes how the terminal device distinguishes between receiving fourth information from the first network device in the first user identity and receiving information corresponding to the first user identity. The following describes how the terminal device distinguishes between receiving fourth information from the first network device in the first user identity and receiving information corresponding to the first user identity.

In the embodiment of the present application, the distinguishing manner of the terminal device may include one or more of the following: the information corresponding to the fourth information and the first user identity is distinguished through SRB, the information corresponding to the fourth information and the first user identity is distinguished through a logic channel, the information corresponding to the fourth information and the first user identity is distinguished through the identification of the user identity, or the information corresponding to the fourth information and the first user identity is distinguished through physical resources. For example, the terminal device may distinguish the fourth information from the information corresponding to the first user identity through the SRB; or the terminal equipment can distinguish the fourth information from the information corresponding to the first user identity through the logic channel and the user identity; or the terminal equipment can distinguish the fourth information from the information corresponding to the first user identity through SRB, a logic channel and the identification of the user identity; or the terminal device may distinguish the fourth information from the information corresponding to the first user identity through the SRB, the logical channel, the physical resource, and the identity of the user, and so on.

If the terminal device distinguishes the first information from the information corresponding to the first user identity by means of the SRB, in one embodiment the terminal device receives the fourth information from the first network device in the first user identity and in the fourth SRB. The fourth SRB is different from the third SRB, and the third SRB is configured to receive, with the first user identity, information corresponding to the first user identity from the first network device.

If the terminal device distinguishes the fourth information and the information corresponding to the first user identity through the logical channel, in one embodiment, the terminal device receives the fourth information from the first network device in the first user identity and in the fourth logical channel corresponding to the third SRB. The fourth logical channel is different from the third logical channel, and the third logical channel is used for receiving information corresponding to the first user identity from the first network device by the first user identity.

If the terminal device distinguishes the fourth information from the information corresponding to the first user identity through the identifier of the user identity, in one implementation manner, the fourth information may include the identifier of the second user identity. And when the terminal equipment receives the information corresponding to the first user identity from the first network equipment by the first user identity, the information can also comprise the identification of the first user identity.

If the terminal device distinguishes the fourth information from the information corresponding to the first user identity by means of the physical resource, in one embodiment the terminal device receives the fourth information from the first network device in the first user identity and in the second physical resource. The second physical resource is different from the first physical resource, and the first physical resource is used for receiving information corresponding to the first user identity from the first network device by the first user identity. For an explanation of physical resources, reference may be made to the foregoing.

The distinguishing mode adopted by the terminal equipment when distinguishing the first information and the information corresponding to the first user identity can be the same or different from the distinguishing mode adopted by the terminal equipment when distinguishing the fourth information and the information corresponding to the first user identity. For example, if the terminal device distinguishes the first information and the information corresponding to the first user identity through the physical resource, the terminal device may continue to distinguish the fourth information and the information corresponding to the first user identity through the physical resource, or the terminal device may also distinguish the fourth information and the information corresponding to the first user identity through the SRB.

S505, the terminal equipment sends the RRC reconfiguration complete (RRC reconfiguration complete) message corresponding to the second user identity to the second network equipment by the second user identity, and the second network equipment receives the RRC reconfiguration complete message from the terminal equipment of the second user identity.

At this time, the terminal device may be considered to be in the RRC connected state with the second user identity, and the terminal device may send an RRC reconfiguration complete message to the second network device with the second user identity, and the terminal device may continue to execute a subsequent procedure with the second user identity, for example, the terminal device may perform data transmission according to information in the RRC reconfiguration message included in the second information with the second user identity.

As an alternative embodiment, the fourth information may further include second indication information, where the second indication information is used to instruct the terminal device to communicate in the second network with the second user identity, or to instruct the terminal device to communicate in the first network with the second user identity, where the second network is a network corresponding to the second user identity, and the first network is a network corresponding to the first user identity. It is understood that the first network is the network in which the first network device is located and the second network is the network in which the second network device is located.

If the fourth information includes second indication information, and the second indication information indicates that the terminal device communicates in the second network with the second user identity, S505 may be performed; or if the fourth information includes second instruction information, and the second instruction information instructs the terminal device to communicate in the first network with the second user identity, S505 does not have to be performed, but is performed: the terminal equipment sends an RRC reconfiguration complete message corresponding to the second user identity to the first network equipment by the first user identity, the first network equipment receives the RRC reconfiguration complete message from the terminal equipment of the first user identity, the first network equipment sends the RRC reconfiguration complete message to the second network equipment, and the second network equipment receives the RRC reconfiguration complete message from the first network equipment.

For the subsequent flow, reference may be made to the description of the flow shown in fig. 4, and no further description is given.

When the terminal equipment is in the RRC connection state with the second user identity, the terminal equipment can be in the RRC idle state or the RRC inactive state with the first user identity, or can be in the RRC connection state with the first user identity. If the terminal device is in the RRC connected state with the second user identity, the terminal device needs to be in the RRC idle state or the RRC inactive state with the first user identity, for example, the terminal device may enter the RRC idle state or the RRC inactive state with the first user identity when receiving the fourth information from the first network device with the first user identity, or the terminal device may enter the RRC idle state or the RRC inactive state with the first user identity at other times, which is not limited by the embodiment of the present application.

In the embodiment of the application, the terminal equipment is in an RRC connection state according to the first user identity, and is in an RRC idle state or an RRC inactive state according to the second user identity. If the connection between the second user identity and the network is required to be established, the first information corresponding to the second user identity can be sent to the first network equipment through the first user identity, so that the RRC connection between the second user identity and the network is assisted through the RRC connection of the first user identity, the requirement of the second user identity on the RRC connection with the network can be met, the time required by the RRC connection establishment process can be reduced, the speed of the second user identity on the RRC connection with the network is accelerated, the service time delay is reduced, and the use experience of a user is improved. In addition, the first information may include all or part of information included in the Msg3 corresponding to the second user identity, and all or part of information included in the Msg5 corresponding to the second user identity, which is equivalent to sending the information included in the Msg3 and the information included in the Msg5 to the network device together, so that an interaction process between the terminal device and the network device is reduced. And the first information comprises some configuration parameters of the second user identity of the terminal equipment, and the terminal equipment sends the first information to the network equipment together, so that the configuration process of the network equipment to the second user identity can be performed in advance, the terminal equipment is facilitated to realize communication with the second user identity as soon as possible, and the communication time delay is further reduced.

In order to solve the same technical problem, the embodiment of the present application provides a second communication method, please refer to fig. 6, which is a flowchart of the method. In the following description, this method is taken as an example applied to the network architecture shown in fig. 3B. By the method provided by the embodiment shown in fig. 6, the service delay can be further reduced. It should be noted that, the method may also be applied to the network architecture shown in fig. 3D, and in the following description, the terminal device supporting the first user identity is replaced by the first terminal device, and the terminal device supporting the second user identity is replaced by the second terminal device. The first terminal device is for example terminal device 1 in fig. 3D and the second terminal device is for example terminal device 2 in fig. 3D.

S601, the terminal equipment sends a third message to the first network equipment by the first user identity, and the first network equipment receives the third message from the terminal equipment of the first user identity.

In executing S601, the terminal device is in an RRC connected state with the first user identity, and in an RRC idle state or an RRC inactive state with the second user identity. If the terminal device needs to enter the RRC connected state with the second user identity, for example, the terminal device needs to send uplink data with the second user identity, or the terminal device receives a paging message with the second user identity, etc., the terminal device needs to establish an RRC connection with the second network device with the second user identity if the terminal device is in the RRC idle state with the second user identity, or the terminal device needs to restore the RRC connection with the second network device with the second user identity if the terminal device is in the RRC inactive state with the second user identity.

In this way, the terminal device generates the third message with the second user identity, but the terminal device sends the third message to the first network device with the first user identity, which corresponds to the third message being sent to the network by the first user identity in RRC connected state.

The third message may be a third message (Msg 3) in a random access procedure corresponding to the second user identity, the third message being used to request establishment, reestablishment or restoration of the RRC connection with the second user identity. For the implementation of Msg3, etc., reference is made to the description related to S501 in the embodiment shown in fig. 5.

In the embodiment of the application, before the terminal device sends the third message to the first network device with the first user identity, the terminal device may further determine to send the third message to the first network device with the first user identity. As for the determination of the terminal device, reference may be made to the description of the terminal device determining the content of the first information transmitted to the first network device in the first user identity in S501 in the embodiment shown in fig. 5.

In addition, if the terminal device needs to obtain the second TA, the second TA may be obtained through the second network device, for example. For example, the second network device may carry the second TA in the release message when releasing the terminal device of the second user identity. The terminal device may acquire the second TA when the second user identity is released.

Or the terminal device may also obtain the second TA through other information from the second network device. For example, before the terminal device sends the third message to the first network device with the first user identity, the terminal device may also send first information to the first network device with the first user identity, where the first information may include a preamble in a random access procedure corresponding to the second user identity. For example, the terminal device may send, to the first network device, msg1 in the random access procedure corresponding to the second user identity with the first user identity, where Msg1 may be regarded as a preamble. After the first network device receives the first information, the first information may be forwarded to a second network device where the second user identity resides, where the second network device receives the first information from the first network device. The second network device may generate second information from the first information and send the second information to the first network device, which receives the second information from the second network device. The second information is used for responding to the fifth information, for example, the second information may include all or part of information included in Msg2 in the random access procedure corresponding to the second user identity. The second TA may be included in the second information. For example, the second network device may send Msg2 in the random access procedure corresponding to the second user identity to the first network device, where Msg2 includes the second information, and the first network device may receive the Msg2 from the second network device.

In the embodiment of the application, the terminal equipment can distinguish the preamble corresponding to the first information and the first user identity through the physical resource; or the first information and the preamble corresponding to the first user identity can be distinguished through the identification of the user identity; or the first information and the preamble corresponding to the first user identity can be distinguished through physical resources, or the first information and the preamble corresponding to the first user identity can be distinguished through the identity of the user identity. In addition, the terminal equipment can distinguish the Msg2 corresponding to the second information and the first user identity through physical resources; or the second information and the Msg2 corresponding to the first user identity can be distinguished through the identity of the user identity, for example, the second information can include the identity of the second user identity, for example, the ID of the second user identity; or the Msg2 corresponding to the second information and the first user identity can be distinguished through physical resources, and the Msg2 corresponding to the sixth information and the first user identity can be distinguished through the identification of the user identity. For this part, reference is made to the relevant description of S501 in the embodiment shown in fig. 5.

In the embodiment of the present application, the terminal device may also distinguish the third message from the information corresponding to the first user identity (for example, msg3 corresponding to the first user identity). In the embodiment of the present application, the distinguishing manner of the terminal device may include one or more of the following: the information corresponding to the third message and the first user identity is distinguished through SRB, the information corresponding to the third message and the first user identity is distinguished through a logic channel, the information corresponding to the third message and the first user identity is distinguished through the identification of the user identity, or the information corresponding to the third message and the first user identity is distinguished through physical resources. For example, the terminal device may distinguish the third message from the information corresponding to the first user identity through the SRB; or the terminal equipment can distinguish the third message from the information corresponding to the first user identity through the logic channel and the user identity; or the terminal equipment can distinguish the third message from the information corresponding to the first user identity through SRB, a logic channel and the user identity; or the terminal device may distinguish the third message from the information corresponding to the first user identity through the SRB, the logical channel, the physical resource, and the identity of the user, and so on. For this part, reference is made to the relevant description of S501 in the embodiment shown in fig. 5.

S602, the first network device forwards the third message to the second network device, and the second network device receives the third message from the first network device.

S603, the second network device sends a fourth message to the first network device, and the first network device receives the fourth message from the second network device. The fourth message is for responding to the third message. For example, the fourth message may be Msg4 in the random access procedure corresponding to the second user identity.

After the second network device receives the third message, response information of the third message may be generated, that is, a fourth message is generated. Since the second network device is the third message received from the first network device, the second network device may also send the fourth message to the first network device.

S604, the first network device sends the fourth message to the terminal device of the first user identity, and the terminal device receives the fourth message from the first network device with the first user identity.

The terminal device is a fourth message received in the first user identity, but the fourth message corresponds to the second user identity, so that the terminal device may use the fourth message for the second user identity, which corresponds to the terminal device having obtained the fourth message in the second user identity.

In the embodiment of the present application, the terminal device may also distinguish the fourth message from the information corresponding to the first user identity (for example, msg4 corresponding to the first user identity). In the embodiment of the present application, the distinguishing manner of the terminal device may include one or more of the following: the information corresponding to the fourth message and the first user identity is distinguished through SRB, the information corresponding to the fourth message and the first user identity is distinguished through a logic channel, the information corresponding to the fourth message and the first user identity is distinguished through the identification of the user identity, or the information corresponding to the fourth message and the first user identity is distinguished through physical resources. For example, the terminal device may distinguish, by the SRB, the fourth message from information corresponding to the first user identity; or the terminal equipment can distinguish the fourth message from the information corresponding to the first user identity through the logic channel and the user identity; or the terminal equipment can distinguish the fourth message from the information corresponding to the first user identity through SRB, a logic channel and the user identity; or the terminal device may distinguish the fourth message from the information corresponding to the first user identity through the SRB, the logical channel, the physical resource, and the identity of the user, and so on. For this part, reference is made to the relevant description of S504 in the embodiment shown in fig. 5.

S605, the terminal equipment sends Msg5 in the random access process corresponding to the second user identity to the second network equipment by the second user identity, and the second network equipment receives the Msg5 from the terminal equipment of the second user identity.

At this time, the terminal device may be considered to be in the RRC connected state with the second user identity, the terminal device may send Msg5 to the second network device with the second user identity, and the terminal device may continue to execute the subsequent procedure with the second user identity.

As an alternative embodiment, the fourth message may further include second indication information, where the second indication information is used to instruct the terminal device to communicate in the second network with the second user identity, or to instruct the terminal device to communicate in the first network with the second user identity, where the second network is a network corresponding to the second user identity, and the first network is a network corresponding to the first user identity. It is understood that the first network is the network in which the first network device is located and the second network is the network in which the second network device is located. Wherein S605 may be performed if the fourth message comprises second indication information, and the second indication information indicates that the terminal device communicates in the second network with the second user identity; or if the fourth message includes second indication information, and the second indication information indicates that the terminal device communicates in the first network with the second user identity, S605 need not be performed, but is performed: the terminal equipment sends Msg5 corresponding to the second user identity to the first network equipment by the first user identity, the first network equipment receives the Msg5 from the terminal equipment of the first user identity, the first network equipment sends the Msg5 to the second network equipment, and the second network equipment receives the Msg5 from the first network equipment. For this part, reference is made to the relevant description of S505 in the embodiment shown in fig. 5.

In the embodiment of the application, the terminal equipment is in an RRC connection state according to the first user identity, and is in an RRC idle state or an RRC inactive state according to the second user identity. If the connection between the second user identity and the network is required to be established, the first information corresponding to the second user identity can be sent to the first network equipment through the first user identity, so that the RRC connection between the second user identity and the network is assisted through the RRC connection of the first user identity, the requirement of the second user identity on the RRC connection with the network can be met, the time required by the RRC connection establishment process can be reduced, the speed of the second user identity on the RRC connection with the network is accelerated, the service time delay is reduced, and the use experience of a user is improved.

In the embodiment shown in fig. 5 and the embodiment shown in fig. 6, the two user identities of the terminal device correspond to different network devices, and information needs to be forwarded between the two network devices. But there may also be a case where two user identities of a terminal device correspond to the same network device, i.e. the scenario shown in fig. 3A. For example, the terminal device supports a first user identity and a second user identity, the terminal device having access to a network device with the first user identity, the terminal device also residing with the second user identity in the network device. If this is the case, the solution provided by the embodiment of the present application may be further applied, for example, in the embodiment shown in fig. 5 or the embodiment shown in fig. 6, where the first network device and the second network device are the same network device, and the forwarding step between the two network devices may not be performed. The two user identities correspond to the same network equipment, so that the forwarding steps between the network equipment are reduced, and the time delay is reduced more favorably. Or there may be a case where there are two terminal devices supporting the first user identity and the second user identity, respectively, which correspond to the same network device, i.e. the scenario shown in fig. 3C. For example, a first terminal device supports a first user identity, a second terminal device supports a second user identity, the first terminal device is a network device to which the first user identity is connected, and the second terminal device is also a network device to which the second user identity is resident. If this is the case, the solution provided by the embodiment of the present application may be further applied, for example, in the embodiment shown in fig. 5 or the embodiment shown in fig. 6, the first network device and the second network device are the same network device, the terminal device supporting the first user identity is the first terminal device, the terminal device supporting the second user identity is the second terminal device, and the forwarding step between the two network devices may not be performed. The two user identities correspond to the same network equipment, so that the forwarding steps between the network equipment are reduced, and the time delay is reduced more favorably.

In order to solve the same technical problem, the embodiment of the present application provides a third communication method, please refer to fig. 7, which is a flowchart of the method. In the following description, this method is taken as an example applied to the network architecture shown in fig. 3B. It should be noted that, the method may also be applied to the network architecture shown in fig. 3D, and in the following description, the terminal device supporting the first user identity is replaced by the first terminal device, and the terminal device supporting the second user identity is replaced by the second terminal device. The first terminal device is for example terminal device 1 in fig. 3D and the second terminal device is for example terminal device 2 in fig. 3D.

S701, the terminal equipment sends Msg1 in a random access process corresponding to a second user identity to the first network equipment by the first user identity, and the first network equipment receives the Msg1 from the terminal equipment of the first user identity.

The terminal device supports a first user identity and a second user identity, the first network device being a network device to which the terminal device has access in the first user identity, the terminal device residing in the second network device in the second user identity. In executing S701, the terminal device is in an RRC connected state with the first user identity, and in an RRC idle state or an RRC inactive state with the second user identity.

The terminal device needs to perform random access to the second network device with the second user identity in order to establish an RRC connection with the second network device with the second user identity or to restore the RRC connection. For example, the terminal device triggers the random access procedure with the second user identity, and in the embodiment of the present application, the terminal device may assist the second user identity with the second network device in random access with the first user identity, so as to reduce the time required for the terminal device to establish the RRC connection with the second network device with the second user identity.

In the embodiment of the application, the terminal equipment can distinguish the Msg1 corresponding to the second user identity from the Msg1 corresponding to the first user identity through physical resources; or the Msg1 corresponding to the second user identity and the Msg1 corresponding to the first user identity can be distinguished through the identification of the user identity; or the Msg1 corresponding to the second user identity and the Msg1 corresponding to the second user identity can be distinguished through physical resources, and the Msg1 corresponding to the second user identity and the Msg1 corresponding to the first user identity can be distinguished through the identification of the user identity. For this part, reference is made to the relevant description of S501 in the embodiment shown in fig. 5.

Prior to S701, the second network device may release the connection with the terminal device of the second user identity. For example, reference may be made to S702, in which the second network device sends a release message to the terminal device of the second user identity, the release message being used to release the connection with the terminal device of the second user identity. After receiving the release message with the second user identity, the terminal device may enter an RRC inactive state or an RRC idle state. As an alternative, the release message may also indicate that the second user identity may be randomly accessed through the channel to which the first user identity corresponds. The terminal device may thereby determine that the Msg1 corresponding to the second user identity can be sent to the first network device in the first user identity.

S703, the first network device forwards the Msg1 corresponding to the second user identity to the second network device, and the second network device receives the Msg1 corresponding to the second user identity from the first network device.

S704, the second network equipment sends Msg2 in the random access process corresponding to the second user identity to the first network equipment, and the first network equipment receives the Msg2 from the second network equipment.

After receiving the Msg1 corresponding to the second user identity, the second network device may generate a response message of the Msg1, that is, msg2 corresponding to the second user identity. After generating the Msg2, the second network device may send the Msg2 to the first network device.

For example, the terminal device may distinguish between the Msg2 corresponding to the second user identity and the Msg2 corresponding to the first user identity through a physical resource; or the Msg2 corresponding to the second user identity and the Msg2 corresponding to the first user identity can be distinguished through the identification of the user identity; or the Msg2 corresponding to the second user identity and the Msg2 corresponding to the second user identity can be distinguished through physical resources, and the Msg2 corresponding to the second user identity and the Msg2 corresponding to the first user identity can be distinguished through the identification of the user identity. For this part, reference is made to the relevant description of S501 in the embodiment shown in fig. 5.

The Msg2 corresponding to the second user identity may include a second TA, where the second TA is a TA corresponding to the terminal device communicating in the second network with the second user identity. In addition, the first TA is a TA corresponding to the terminal equipment communicating in the first network with the first user identity. Regarding the size relationship between the first TA and the second TA, etc., reference is made to the description of S501 in the embodiment shown in fig. 5.

S705, the first network device sends the Msg2 corresponding to the second user identity to the terminal device of the first user identity, and the terminal device receives the Msg2 from the first network device by the first user identity.

The terminal device is the Msg2 corresponding to the second user identity received by the first user identity, but the Msg2 corresponds to the second user identity, so that the terminal device can use the Msg2 corresponding to the second user identity for the second user identity, which is equivalent to the terminal device obtaining the Msg2 corresponding to the second user identity by the second user identity.

S706, the terminal equipment sends Msg3 in the random access process corresponding to the second user identity to the first network equipment by the first user identity, and the first network equipment receives the Msg3 from the terminal equipment of the first user identity.

In this Msg3, an identification of the second user identity, e.g. an ID of the second user identity, may be included.

S707, the first network device forwards the Msg3 corresponding to the second user identity to the second network device, and the second network device receives the Msg3 from the first network device.

S708, the second network equipment sends the Msg4 in the random access process corresponding to the second user identity to the first network equipment, and the first network equipment receives the Msg4 from the second network equipment.

After receiving the Msg3 corresponding to the second user identity, the second network device may generate a response message of the Msg3, that is, msg4 corresponding to the second user identity. After generating the Msg4, the second network device may send the Msg4 to the first network device.

In this Msg4, an identification of the second user identity, e.g. an ID of the second user identity, may be included.

S709, the first network device forwards Msg4 corresponding to the second user identity to the second network device, and the second network device receives the Msg4 from the first network device.

S710, the terminal equipment sends Msg5 in the random access process corresponding to the second user identity to the first network equipment by the second user identity, and the first network equipment receives the Msg5 from the terminal equipment of the second user identity.

After receiving Msg4, the terminal device may disconnect the RRC connection with the first network device with a first user identity and establish the RRC connection with the second network device with a second user identity.

After the terminal device sends the Msg5 in the random access procedure corresponding to the second user identity to the first network device with the second user identity, the terminal device may continue to execute the subsequent procedure with the second user identity, for example, may perform data transmission with the second network device. For the subsequent flow, reference may be made to the description of the flow shown in fig. 4, and no further description is given.

Or as an alternative implementation manner, the Msg4 corresponding to the second user identity may further include second indication information, where the second indication information is used to instruct the terminal device to communicate in the second network with the second user identity, or is used to instruct the terminal device to communicate in the first network with the second user identity, where the second network is a network corresponding to the second user identity, and the first network is a network corresponding to the first user identity. It is understood that the first network is the network in which the first network device is located and the second network is the network in which the second network device is located. Wherein if the Msg4 corresponding to the second user identity includes second indication information, and the second indication information indicates that the terminal device communicates in the second network with the second user identity, S710 may be performed; or if the Msg4 corresponding to the second user identity includes second indication information, and the second indication information indicates that the terminal device communicates in the first network with the second user identity, S710 is not necessarily performed, but is performed: the terminal equipment sends Msg5 corresponding to the second user identity to the first network equipment by the first user identity, the first network equipment receives the Msg5 from the terminal equipment of the first user identity, the first network equipment sends the Msg5 to the second network equipment, and the second network equipment receives the Msg5 from the first network equipment. For this part, reference is made to the relevant description of S505 in the embodiment shown in fig. 5.

For example, if the subsequent data transmission corresponding to the second user identity and the like continue to be forwarded to the second network device through the first user identity, the terminal device may not need to learn the second TA. However, if the subsequent data transmission corresponding to the second user identity is that the terminal device sends the second user identity to the second network device, the terminal device needs to acquire the second TA before the data transmission corresponding to the second user identity. Thus, in an embodiment of the present application, a method of acquiring a second TA is provided for subsequent data transmission between a second user identity and a second network device.

In order to solve the same technical problem, the embodiment of the present application provides a fourth communication method, please refer to fig. 8, which is a flowchart of the method. In the following description, this method is taken as an example applied to the network architecture shown in fig. 3B. The embodiment shown in fig. 8 helps to further reduce the delay. It should be noted that, the method may also be applied to the network architecture shown in fig. 3D, and in the following description, the terminal device supporting the first user identity is replaced by the first terminal device, and the terminal device supporting the second user identity is replaced by the second terminal device. The first terminal device is for example terminal device 1 in fig. 3D and the second terminal device is for example terminal device 2 in fig. 3D.

S801, a terminal device sends first information in a random access process corresponding to a second user identity to a first network device by the first user identity, and the first network device receives the first information from the terminal device of the first user identity.

The terminal device supports a first user identity and a second user identity, the first network device being a network device to which the terminal device has access in the first user identity, the terminal device residing in the second network device in the second user identity. In the execution of S801, the terminal device is in RRC connected state with the first user identity, and in RRC idle state or in RRC inactive state with the second user identity.

The first information is information corresponding to the second user identity. For example, the first information may include second information and third information. The second information may include all or part of information included in the Msg1 in the random access procedure corresponding to the second user identity. The third information may include all or part of information included in Msg3 in the random access procedure corresponding to the second user identity. Regarding the implementation of Msg3 and the like, reference is made to the description related to S501 in the embodiment shown in fig. 5.

The first information may include all or part of information included in the Msg1 corresponding to the second user identity, and all or part of information included in the Msg3 corresponding to the second user identity, which is equivalent to sending the information included in the Msg1 and the information included in the Msg3 to the network device together, so that an interaction process between the terminal device and the network device is reduced. The first information may include an identification of the second user identity such that the first network device may determine that the first information corresponds to the second user identity.

For example, the terminal device may add the first information to a message, e.g. referred to as a first combined message, corresponding to the first combined message comprising the first information. Of course, the message may have other names, and the names of the messages do not limit the messages themselves. The terminal device may send the first combined message to the first network device with the first user identity, and the first network device receives the first combined message, i.e. the first information. The first information includes second information and third information, if the second information includes all or part of the information of the Msg1 and the third information includes all or part of the information of the Msg3, then the information included in the Msg1 and the information included in the Msg3 are added to one message, and if there is a repeated part in the information included in the Msg1 and the information included in the Msg3, only one part needs to be included in the first combined message for the repeated part. By the method, redundant information in the first combined message can be reduced, the overhead of the first combined message is reduced, and the success rate of effective information transmission can be improved.

Or the terminal device may put the second information and the third information in different messages, and send the second information and the third information to the first network device with the first user identity, which is also equivalent to the terminal device sending the first information to the first network device with the first user identity. For example, the terminal device may send, to the first network device, msg1 corresponding to the second user identity and Msg3 corresponding to the second user identity with the first user identity, where Msg1 corresponding to the second user identity includes the second information, and Msg3 corresponding to the second user identity includes the third information. The first network device receives the Msg1 corresponding to the second user identity and the Msg3 corresponding to the second user identity, and thus obtains the first information.

As to the manner in which the terminal device transmits the first information to the first network device in the first user identity, reference is made to the relevant description of S501 in the embodiment shown in fig. 5.

The terminal device may determine to send the first information to the first network device with the first user identity before sending the first information to the first network device with the first user identity. Regarding the determination manner of the terminal device, as well as regarding the content of the TA, etc., reference is made to the relevant description of S501 in the embodiment shown in fig. 5.

In the embodiment of the application, the terminal equipment can distinguish the first information corresponding to the second user identity and the information corresponding to the first user identity through physical resources; or the first information corresponding to the second user identity and the information corresponding to the first user identity can be distinguished through the identification of the user identity; or the first information corresponding to the second user identity and the information corresponding to the second user identity can be distinguished through physical resources, and the first information corresponding to the second user identity and the information corresponding to the first user identity can be distinguished through the identification of the user identity. For this part, reference is made to the relevant description of S501 in the embodiment shown in fig. 5.

Before S801, the second network device releases the terminal device of the second user identity. For example, reference may be made to S802, in which the second network device sends a release message to the terminal device of the second user identity, the release message being used to release the terminal device of the second user identity. After receiving the release message with the second user identity, the terminal device may enter an RRC inactive state or an RRC idle state. As an alternative, the release message may also indicate that the second user identity may be randomly accessed through the channel to which the first user identity corresponds. The terminal device can determine that the first information corresponding to the second user identity can be sent to the first network device in the first user identity.

S803, the first network device forwards the first information to the second network device, and the second network device receives the first information from the first network device.

If in S801 the terminal device sends a first combined message to the first network device with the first user identity, then in S803 the first network device may forward the first combined message to the second network device, which may also receive the first combined message from the first network device. Or if in S801 the terminal device sends two messages to the first network device with the first user identity, the two messages carrying the second information and the third information, respectively, the first network device may forward the two messages to the second network device in S803, and the second network device may receive the two messages from the first network device. For example, in S801, the terminal device sends Msg1 and Msg3 corresponding to the second user identity to the first network device with the first user identity, and in S803, the first network device may forward Msg1 and Msg3 corresponding to the second user identity to the second network device, and the second network device may receive Msg1 and Msg3 corresponding to the second user identity from the first network device.

S804, the second network device sends fourth information to the first network device, and the first network device receives the fourth information from the second network device. The fourth information is used to respond to the first information, and thus the fourth information is information corresponding to the second user identity of the terminal device.

After the second network device receives the first information, response information of the first information may be generated, that is, fourth information is generated. Since the second network device is the first information received from the first network device, the second network device may also send the fourth information to the first network device. The fourth information may include an identification of the second user identity.

The first information includes the second information and the third information, and then the fourth information generated by the second network device may include response information of the second information or may include response information of the third information. The response information of the second information, for example, includes all or part of the information included in the Msg2 corresponding to the second user identity, and the response information of the third information, for example, includes all or part of the information included in the Msg4 corresponding to the second user identity. The response information of the second information may include the second TA. The second TA is a TA corresponding to which the terminal device communicates in the second network with the second user identity. In addition, the first TA is a TA corresponding to the terminal equipment communicating in the first network with the first user identity. Regarding the size relationship between the first TA and the second TA, etc., reference is made to the description of S501 in the embodiment shown in fig. 5.

Or the second network device may put the response information of the second information and the response information of the third information into different messages, and send the response information of the second information and the response information of the third information to the first network device, which is equivalent to that the second network device sends the fourth information to the first network device. For example, the second network device may send Msg2 and Msg4 corresponding to the second user identity to the first network device, where Msg2 corresponding to the second user identity includes response information of the second information, and Msg4 corresponding to the second user identity includes response information of the third information. The first network device receives the Msg2 corresponding to the second user identity and the Msg4 corresponding to the second user identity, and thus fourth information is obtained.

As to the manner in which the second network device transmits the first information to the first network device, reference may be made to the description related to S501 in the embodiment shown in fig. 5.

S805, the first network device sends the fourth information to the terminal device of the first user identity, and the terminal device receives the fourth information from the first network device with the first user identity.

If the first network device receives a second combined message corresponding to the second user identity from the second network device in S804, the first network device may send the second combined message to the terminal device of the first user identity in S805, and the terminal device may receive the second combined message from the first network device in the first user identity.

Or if in S804 the first network device receives two messages corresponding to the second user identity from the second network device, where the two messages respectively carry the response information of the second information and the response information of the third information, in S804 the first network device may send the two messages to the terminal device, and the terminal device receives the two messages from the first network device with the first user identity, so that the fourth information is obtained. For example, in S805, the first network device receives Msg2 and Msg4 corresponding to the second user identity from the second network device, and in S805, the first network device may send Msg2 and Msg4 corresponding to the second user identity to the terminal device of the first user identity, and the terminal device may receive Msg2 and Msg4 corresponding to the second user identity from the first network device with the first user identity.

S806, the terminal equipment sends the Msg5 in the random access process corresponding to the second user identity to the first network equipment by the second user identity, and the first network equipment receives the Msg5 from the terminal equipment of the second user identity.

Or as an alternative implementation manner, the response information of the third information may further include second indication information, where the second indication information is used to instruct the terminal device to communicate in the second network with the second user identity, or is used to instruct the terminal device to communicate in the first network with the second user identity, where the second network is a network corresponding to the second user identity, and the first network is a network corresponding to the first user identity. It is understood that the first network is the network in which the first network device is located and the second network is the network in which the second network device is located. Wherein if the response information of the third information includes second indication information, and the second indication information indicates that the terminal device communicates in the second network with the second user identity, S806 may be performed; or if the response information of the third information includes the second instruction information, and the second instruction information instructs the terminal device to communicate in the first network with the second user identity, S806 is not necessarily performed, but is performed: the terminal equipment sends Msg5 corresponding to the second user identity to the first network equipment by the first user identity, the first network equipment receives the Msg5 from the terminal equipment of the first user identity, the first network equipment sends the Msg5 to the second network equipment, and the second network equipment receives the Msg5 from the first network equipment. For this part, reference is made to the relevant description of S505 in the embodiment shown in fig. 5.

For example, if the subsequent data transmission corresponding to the second user identity and the like continue to be forwarded to the second network device through the first user identity, the terminal device may not need to learn the second TA. However, if the subsequent data transmission corresponding to the second user identity is that the terminal device sends the second user identity to the second network device, the terminal device needs to acquire the second TA before the data transmission corresponding to the second user identity. Thus, in an embodiment of the present application, a method of acquiring a second TA is provided for subsequent data transmission between a second user identity and a second network device. In the embodiment of the application, the Msg1 and the Msg3 corresponding to the second user identity can be sent together, so that the speed of establishing RRC connection between the second user identity and the network is further increased, the time delay of the service is reduced, and the use experience of the user is improved.

In the embodiment shown in fig. 7 and the embodiment shown in fig. 8, the two user identities of the terminal device correspond to different network devices, and information needs to be forwarded between the two network devices. But there may also be a case where two user identities of a terminal device correspond to the same network device, i.e. the scenario shown in fig. 3A. For example, the terminal device supports a first user identity and a second user identity, the terminal device having access to a network device with the first user identity, the terminal device also residing with the second user identity in the network device. If this is the case, the solution provided by the embodiment of the present application may be further applied, for example, in the embodiment shown in fig. 7 or the embodiment shown in fig. 8, where the first network device and the second network device are the same network device, and the forwarding step between the two network devices may not be performed. The two user identities correspond to the same network equipment, so that the forwarding steps between the network equipment are reduced, and the time delay is reduced more favorably. Or there may be a case where there are two terminal devices supporting the first user identity and the second user identity, respectively, which correspond to the same network device, i.e. the scenario shown in fig. 3C. For example, a first terminal device supports a first user identity, a second terminal device supports a second user identity, the first terminal device is a network device to which the first user identity is connected, and the second terminal device is also a network device to which the second user identity is resident. If this is the case, the solution provided by the embodiment of the present application may be further applied, for example, in the embodiment shown in fig. 7 or the embodiment shown in fig. 8, the first network device and the second network device are the same network device, the terminal device supporting the first user identity is the first terminal device, the terminal device supporting the second user identity is the second terminal device, and the forwarding step between the two network devices may not be performed. The two user identities correspond to the same network equipment, so that the forwarding steps between the network equipment are reduced, and the time delay is reduced more favorably.

The apparatus for implementing the above method in the embodiment of the present application is described below with reference to the accompanying drawings. Therefore, the above contents can be used in the following embodiments, and repeated contents are not repeated.

Fig. 9 is a schematic block diagram of a communication device according to an embodiment of the present application. The communication means is for example a terminal device 900.

The terminal device 900 comprises a processing module 910. Optionally, a sending module 920 and a receiving module 930 may also be included. The terminal device 900 may be a terminal device, a chip applied in the terminal device, or other combined devices, components, etc. having the functions of the terminal device. When the terminal device 900 is a terminal device, the transmitting module 920 may be a transmitter, the receiving module 930 may be a receiver, the transmitter or the receiver may include an antenna, a radio frequency circuit, and the like, and the processing module 910 may be a processor, for example, a baseband processor, which may include one or more central processing units (central processing unit, CPUs) therein. When the terminal device 900 is a component having the above-described terminal function, the transmitting module 920 and the receiving module 930 may be radio frequency units, and the processing module 910 may be a processor, for example, a baseband processor. When the terminal device 900 is a chip system, the transmitting module 920 and the receiving module 930 may be input/output interfaces of a chip (e.g., a baseband chip), and the processing module may be a processor of the chip system and may include one or more central processing units.

Wherein the processing module 910 may be configured to perform all operations performed by the terminal device in the embodiment shown in fig. 5, except for the transceiving operations, such as generating the first information, etc., and/or other procedures for supporting the techniques described herein. The transmission module 920 may be used to perform all transmission operations performed by the terminal device in the embodiment illustrated in fig. 5, e.g., S501, and/or other processes for supporting the techniques described herein. The receiving module 930 may be configured to perform all of the receiving operations performed by the terminal device in the embodiment illustrated in fig. 5, e.g., S504, and/or other processes for supporting the techniques described herein.

In addition, the transmitting module 920 and the receiving module 930 may be one functional module that can perform both transmitting operations and receiving operations, and may be referred to as a transceiver module, for example, the transceiver module may be used to perform all transmitting operations and receiving operations performed by the terminal device in the embodiment shown in fig. 5, for example, the transceiver module may be considered to be a transmitting module when performing transmitting operations and may be considered to be a receiving module when performing receiving operations; alternatively, the sending module 920 and the receiving module 930 may be two functional modules, where the sending module 920 and the receiving module 930 may be regarded as a generic term of the two functional modules, and the two functional modules are respectively a sending module 920 and a receiving module 930, where the sending module 920 is used to perform sending operations, for example, the sending module 920 may be used to perform all sending operations performed by the terminal device in the embodiment shown in fig. 5, and the receiving module 930 is used to perform receiving operations, for example, the receiving module 930 may be used to perform all receiving operations performed by the terminal device in the embodiment shown in fig. 5.

The sending module 920 is configured to send first information to a first network device with a first user identity, where the first information includes second information and third information, where the terminal device 900 supports the first user identity and the second user identity, the terminal device 900 is in an RRC connection state in a network where the first user identity is located, and is in an RRC idle state or an RRC inactive state in a network where the second user identity is located, where the second information is used to request establishment of an RRC connection with the second user identity, the third information is used to indicate establishment of an RRC connection with the second user identity is completed, or the second information is used to request restoration of an RRC connection with the second user identity, and the third information is used to indicate restoration of an RRC connection with the second user identity is completed;

a receiving module 930, configured to receive fourth information from the first network device with the first user identity, where the fourth information is used to respond to the first information.

As an optional implementation manner, the second information is information included in a third message in the random access process corresponding to the second user identity, where the third message is an RRC establishment request message, an RRC reestablishment request message, or an RRC recovery request message.

As an optional implementation manner, the third information is information included in a fifth message in the random access process corresponding to the second user identity, where the fifth message is an RRC establishment complete message, an RRC reestablishment complete message, or an RRC recovery complete message.

As an alternative embodiment, the receiving module 930 is configured to receive the fourth information from the first network device with the first user identity by:

the fourth information is transmitted through an RRC reconfiguration message.

As an alternative embodiment, the processing module 910 is configured to determine, before the sending module 920 sends the first information to the first network device with the first user identity, to send the first information to the first network device with the first user identity.

As an alternative embodiment, the processing module 910 is configured to determine to send the first information to the first network device with the first user identity by:

Determining to send the first information to the first network device in the first user identity according to the difference between the first time advance and the second time advance being less than or equal to a first threshold, wherein the first time advance is a time advance corresponding to the communication of the terminal device 900 in the first network device in the first user identity, the second time advance is a time advance corresponding to the communication of the terminal device 900 in the second network device in the second user identity, and the second network device is a network device in which the terminal device 900 resides in the second user identity; or alternatively, the first and second heat exchangers may be,

As an alternative to this embodiment of the present invention,

The sending module 920 is further configured to send fifth information to the first network device with the first user identity before sending the first information to the first network device with the first user identity, where the fifth information includes a random access preamble in a random access procedure corresponding to the second user identity;

The receiving module 930 is further configured to receive, with the first user identity, sixth information from the first network device, where the sixth information is used to respond to the fifth information, and the sixth information includes the second time advance, where the second time advance is not equal to the first time advance, and the second network device is a network device where the terminal device 900 resides with the second user identity.

As an alternative embodiment, the sending module 920 is configured to send fifth information to the first network device with the first user identity in one or more of the following manners:

The fifth information includes an identification of the second user identity.

As an alternative embodiment, the sending module 920 is configured to send the first information to the first network device with the first user identity in one or more of the following manners:

As an alternative embodiment, the receiving module 930 is configured to receive the fourth information from the first network device with the first user identity in one or more of the following manners:

As an alternative embodiment, the fourth information includes second indication information, where the second indication information is used to instruct the terminal device 900 to communicate in the second network with the second user identity, or is used to instruct the terminal device 900 to communicate in the first network with the second user identity, where the second network is a network corresponding to the second user identity, and the first network is a network corresponding to the first user identity.

It should be appreciated that the processing module 910 in the embodiment of the present application may be implemented by a processor or a processor related circuit component, the transmitting module 920 may be implemented by a transmitter or a transmitter related circuit component, and the receiving module 930 may be implemented by a receiver or a receiver related circuit component.

Fig. 10 is a schematic block diagram of a communication device according to an embodiment of the present application. The communication means is illustratively a first network device 1000.

The first network device 1000 includes a processing module 1010. Optionally, a transmitting module 1020 and a receiving module 1030 may also be included. The first network device 1000 may be a terminal device, a chip applied in the first network device, or other combination devices, components, etc. having the functions of the first network device. The transmitting module 1020 may be a transmitter and the receiving module 1030 may be a receiver when the first network device 1000 is a first network device, the transmitter or the receiver may include an antenna, a radio frequency circuit, etc., and the processing module 1010 may be a processor, which may include one or more CPUs. When the first network device 1000 is a component having the above-described first network device function, the transmitting module 1020 and the receiving module 1030 may be radio frequency units, and the processing module 1010 may be a processor, for example, a baseband processor. When the first network device 1000 is a chip system, the transmitting module 1020 and the receiving module 1030 may be input/output interfaces of a chip (e.g., a baseband chip), and the processing module may be a processor of the chip system and may include one or more central processing units.

Wherein the processing module 1010 may be configured to perform all operations of the embodiment shown in fig. 5, except for the transceiving operations performed by the first network device, such as determining that the first information corresponds to the second network device, etc., and/or other processes for supporting the techniques described herein. The transmit module 1020 may be configured to perform all transmit operations performed by the first network device in the embodiment illustrated in fig. 5, e.g., S502 and S504, and/or other processes for supporting the techniques described herein. The receiving module 1030 may be configured to perform all of the receiving operations performed by the first network device in the embodiment illustrated in fig. 5, e.g., S501 and S503, and/or other processes for supporting the techniques described herein.

In addition, the transmitting module 1020 and the receiving module 1030 may be one functional module that can perform both transmitting operations and receiving operations, and may be referred to as a transceiver module, for example, the transceiver module may be used to perform all transmitting operations and receiving operations performed by the first network device in the embodiment shown in fig. 5, for example, the transceiver module may be considered to be a transmitting module when performing transmitting operations and may be considered to be a receiving module when performing receiving operations; alternatively, the transmitting module 1020 and the receiving module 1030 may be two functional modules, where the transceiver module may be regarded as a generic term of the two functional modules, and the two functional modules are respectively the transmitting module 1020 and the receiving module 1030, where the transmitting module 1020 is configured to perform the transmitting operation, for example, the transmitting module 1020 may be configured to perform all the transmitting operations performed by the first network device in the embodiment shown in fig. 5, and the receiving module 1030 is configured to perform the receiving operation, for example, the receiving module 1030 may be configured to perform all the receiving operations performed by the first network device in the embodiment shown in fig. 5.

The receiving module 1030 is configured to receive first information of a terminal device from a first user identity, where the first information includes second information and third information, the terminal device supports the first user identity and the second user identity, the terminal device is in an RRC connection state in a network where the first user identity is located, and is in an RRC idle state or an RRC inactive state in the network where the second user identity is located, where the second information is used for requesting establishment of an RRC connection with the second user identity, the third information is used for indicating establishment of an RRC connection with the second user identity is completed, or the second information is used for requesting restoration of an RRC connection with the second user identity, and the third information is used for indicating restoration of an RRC connection with the second user identity is completed;

a processing module 1010, configured to determine fourth information according to the first information, where the fourth information is used to respond to the first information;

and a sending module 1020, configured to send the fourth information to the terminal device of the first user identity.

As an alternative embodiment, the sending module 1020 is configured to send the fourth information to the terminal device of the first user identity by:

the fourth information is transmitted through an RRC reconfiguration message.

As an alternative to this embodiment of the present invention,

The receiving module 1030 is further configured to receive fifth information from a terminal device of a first user identity before receiving first information from the terminal device of the first user identity, where the fifth information includes a random access preamble in a random access procedure corresponding to the second user identity;

the sending module 1020 is further configured to send sixth information to the terminal device of the first user identity, where the sixth information is used to respond to the fifth information, and the sixth information includes the second time advance, where the second time advance is not equal to the first time advance, and the second network device is a network device where the terminal device resides in the second user identity.

As an alternative embodiment, the receiving module 1030 is configured to receive the fifth information from the terminal device of the first user identity by one or more of the following:

Receiving the fifth information transmitted from the terminal device of the first user identity through a fourth physical resource, wherein the fourth physical resource is different from a third physical resource, and the third physical resource is used for the terminal device to send a random access preamble corresponding to the first user identity to a first network device 1000 by using the first user identity; or alternatively, the first and second heat exchangers may be,

The fifth information includes an identification of the second user identity.

As an alternative embodiment, the receiving module 1030 is configured to receive the first information from the terminal device of the first user identity by one or more of the following:

Receiving the first information transmitted by a second SRB from a terminal device of the first user identity, wherein the second SRB is different from a first SRB, and the first SRB is used for the terminal device to send information corresponding to the first user identity to a first network device 1000 by using the first user identity; or alternatively, the first and second heat exchangers may be,

Receiving the first information transmitted from the terminal device of the first user identity through a second logical channel corresponding to a first SRB, where the second logical channel is different from the first logical channel, and the first logical channel is used for the terminal device to send the information corresponding to the first user identity to the first network device 1000 with the first user identity; or alternatively, the first and second heat exchangers may be,

And receiving the first information transmitted from the terminal equipment with the first user identity through a second physical resource, wherein the second physical resource is different from the first physical resource, and the first physical resource is used for the terminal equipment to send information corresponding to the first user identity to the first network equipment 1000 with the first user identity.

As an alternative embodiment, the sending module 1020 is configured to send the fourth information to the terminal device of the first user identity by one or more of the following:

transmitting the fourth information to a terminal device of the first user identity through a fourth SRB, wherein the fourth SRB is different from a third SRB, and the third SRB is used for the terminal device to receive information corresponding to the first user identity from the first network device 1000 with the first user identity; or alternatively, the first and second heat exchangers may be,

Transmitting the fourth information to the first user identity through a fourth logical channel corresponding to a third SRB, where the fourth logical channel is different from a third logical channel, and the third logical channel is used for the terminal device to receive, with the first user identity, information corresponding to the first user identity from the first network device 1000; or alternatively, the first and second heat exchangers may be,

And sending the fourth information to the terminal equipment of the first user identity through a second physical resource, wherein the second physical resource is different from the first physical resource, and the first physical resource is used for the terminal equipment to receive information corresponding to the first user identity from the first network equipment 1000 by using the first user identity.

As an optional implementation manner, the fourth information includes second indication information, where the second indication information is used to instruct the terminal device to communicate in a second network with the second user identity, or is used to instruct the terminal device to communicate in a first network with the second user identity, where the second network is a network corresponding to the second user identity, and the first network is a network corresponding to the first user identity.

It should be appreciated that the processing module 1010 in embodiments of the present application may be implemented by a processor or processor-related circuit component, the transmitting module 1020 may be implemented by a transmitter or transmitter-related circuit component, and the receiving module 1030 may be implemented by a receiver or receiver-related circuit component.

Fig. 11 is a schematic block diagram of a communication device according to an embodiment of the present application. The communication device is illustratively a terminal device 1100.

Terminal device 1100 includes a processing module 1110. Optionally, a sending module 1120 and a receiving module 1130 may also be included. The terminal device 1100 may be a terminal device, or may be a chip applied to the terminal device or other combination device, component, etc. having the functions of the terminal device. When the terminal device 1100 is a terminal device, the transmitting module 1120 may be a transmitter, the receiving module 1030 may be a receiver, the transmitter or the receiver may include an antenna, a radio frequency circuit, etc., and the processing module 1110 may be a processor, which may include one or more CPUs. When the terminal device 1100 is a component having the above-described terminal function, the transmitting module 1120 and the receiving module 1130 may be radio frequency units, and the processing module 1110 may be a processor, for example, a baseband processor. When the terminal device 1100 is a chip system, the transmitting module 1120 and the receiving module 1130 may be input/output interfaces of a chip (e.g., a baseband chip), and the processing module may be a processor of the chip system, and may include one or more central processing units.

The processing module 1110 may be configured to perform all operations performed by the terminal device except for the transceiving operations in the embodiment illustrated in fig. 6, for example, operations of generating a third message in a random access procedure corresponding to the second user identity, and/or other procedures for supporting the techniques described herein. The transmission module 1120 may be used to perform all transmission operations performed by the terminal device in the embodiment shown in fig. 6, e.g., S601, and/or other processes for supporting the techniques described herein. The receiving module 1130 may be configured to perform all of the receiving operations performed by the terminal device in the embodiment shown in fig. 6, e.g., S604, and/or other processes for supporting the techniques described herein.

In addition, the transmitting module 1120 and the receiving module 1130 may be one functional module that can perform both transmitting operations and receiving operations, and may be referred to as a transceiver module, for example, the transceiver module may be used to perform all transmitting operations and receiving operations performed by the terminal device in the embodiment shown in fig. 6, for example, the transceiver module may be considered to be a transmitting module when performing transmitting operations and may be considered to be a receiving module when performing receiving operations; alternatively, the sending module 1120 and the receiving module 1130 may be two functional modules, where the sending module 1120 and the receiving module 1130 may be regarded as a generic term of the two functional modules, and the two functional modules are respectively a sending module 1120 and a receiving module 1130, where the sending module 1120 is used to perform sending operations, for example, the sending module 1120 may be used to perform all sending operations performed by a terminal device in the embodiment shown in fig. 6, and the receiving module 1130 is used to perform receiving operations, for example, the receiving module 1130 may be used to perform all receiving operations performed by a terminal device in the embodiment shown in fig. 6.

A sending module 1120, configured to send a third message to a first network device with a first user identity, where the third message is a third message in a random access process corresponding to the second user identity, and the third message is used to request to establish, reestablish, or recover RRC connection with the second user identity, where a terminal device 1100 supports the first user identity and the second user identity, the terminal device 1100 is in an RRC connection state in a network where the first user identity is located, and is in an RRC idle state or an RRC inactive state in a network where the second user identity is located;

a receiving module 1130, configured to receive a fourth message from the first network device according to the first user identity, where the fourth message is a fourth message in a random access procedure corresponding to the second user identity, and the fourth message is used to respond to the third message.

As an optional implementation manner, the sending module 1120 is further configured to send, to the first network device, a fifth message in a random access procedure corresponding to the second user identity, where the fifth message is used to indicate that establishment, reestablishment, or recovery of the RRC connection with the second user identity is completed.

As an alternative embodiment, the processing module 1110 is configured to determine, before the sending module 1120 sends the third message to the first network device with the first user identity, to send the third message to the first network device with the first user identity.

As an alternative embodiment, the processing module 1110 is configured to determine to send the third message to the first network device with the first user identity by:

Determining that the first message is sent to the first network device according to the difference between the first time advance and the second time advance is smaller than or equal to a first threshold, wherein the first time advance is the time advance corresponding to the communication of the terminal device 1100 in the first network device according to the first user identity, the second time advance is the time advance corresponding to the communication of the terminal device 1100 in the second network device according to the second user identity, and the second network device is the network device where the terminal device 1100 resides according to the second user identity; or alternatively, the first and second heat exchangers may be,

As an alternative to this embodiment of the present invention,

The sending module 1120 is further configured to send, before sending the third message to the first network device with the first user identity, first information to the first network device with the first user identity, where the first information includes a random access preamble in a random access procedure corresponding to the second user identity;

The receiving module 1130 is further configured to receive, with the first user identity, second information from the first network device, where the second information is used to respond to the first information, and the second information includes the second time advance, where the second time advance is not equal to the first time advance, and the second network device is a network device where the terminal device 1100 resides with the second user identity.

As an alternative embodiment, the sending module 1120 is configured to send the first information to the first network device with the first user identity in one or more of the following manners:

The first information includes an identification of the second user identity.

As an alternative embodiment, the sending module 1120 is configured to send the third message to the first network device with the first user identity in one or more of the following manners:

As an alternative embodiment, the receiving module 1130 is configured to receive the fourth message from the first network device with the first user identity in one or more of the following manners:

As an alternative embodiment, the fourth message includes second indication information, where the second indication information is used to instruct the terminal device 1100 to communicate in the second network with the second user identity, or is used to instruct the terminal device 1100 to communicate in the first network with the second user identity, where the second network is a network corresponding to the second user identity, and the first network is a network corresponding to the first user identity.

It should be appreciated that the processing module 1110 in embodiments of the present application may be implemented by a processor or processor-related circuit component, the transmitting module 1120 may be implemented by a transmitter or transmitter-related circuit component, and the receiving module 1130 may be implemented by a receiver or receiver-related circuit component.

Fig. 12 is a schematic block diagram of a communication device according to an embodiment of the present application. The communication means is illustratively a first network device 1200.

The first network device 1200 includes a processing module 1210. Optionally, a transmitting module 1220 and a receiving module 1230 may also be included. The first network device 1200 may be a terminal device, a chip applied in the first network device, or other combination devices, components, etc. having the functions of the first network device. The transmitting module 1220 may be a transmitter, the receiving module 1230 may be a receiver, the transmitter or the receiver may include an antenna, a radio frequency circuit, etc., and the processing module 1210 may be a processor, which may include one or more CPUs, etc., when the first network device 1200 is a first network device. When the first network device 1200 is a component having the above-described first network device function, the transmitting module 1220 and the receiving module 1230 may be radio frequency units, and the processing module 1210 may be a processor, for example, a baseband processor. When the first network device 1200 is a chip system, the transmitting module 1220 and the receiving module 1230 may be input/output interfaces of a chip (e.g., a baseband chip), and the processing module may be a processor of the chip system, and may include one or more central processing units.

Wherein the processing module 1210 may be configured to perform all operations of the embodiment shown in fig. 6, except for the transceiving operations performed by the first network device, such as determining that the third message corresponds to an operation of the second network device, etc., and/or other procedures for supporting the techniques described herein. The transmit module 1220 may be configured to perform all transmit operations performed by the first network device in the embodiment illustrated in fig. 6, e.g., S602 and S604, and/or other processes for supporting the techniques described herein. The receiving module 1230 may be configured to perform all of the receiving operations performed by the first network device in the embodiment illustrated in fig. 6, e.g., S601 and S603, and/or other processes for supporting the techniques described herein.

In addition, the transmitting module 1220 and the receiving module 1230 may be one functional module that can perform both transmitting operations and receiving operations, and may be referred to as a transceiver module, for example, the transceiver module may be used to perform all transmitting operations and receiving operations performed by the first network device in the embodiment shown in fig. 6, for example, the transceiver module may be considered to be a transmitting module when performing transmitting operations and may be considered to be a receiving module when performing receiving operations; alternatively, the sending module 1220 and the receiving module 1230 may be two functional modules, where the sending module 1220 and the receiving module 1230 may be regarded as a generic term of the two functional modules, and the two functional modules are respectively the sending module 1220 and the receiving module 1230, where the sending module 1220 is used to perform sending operations, for example, the sending module 1220 may be used to perform all sending operations performed by the first network device in the embodiment shown in fig. 6, and the receiving module 1230 is used to perform receiving operations, for example, the receiving module 1230 may be used to perform all receiving operations performed by the first network device in the embodiment shown in fig. 6.

The receiving module 1230 is configured to receive a third message from a terminal device of a first user identity, where the third message is a third message in a random access process corresponding to the second user identity, and the third message is used to request to establish, reestablish, or restore RRC connection with the second user identity, where the terminal device supports the first user identity and the second user identity, and the terminal device is in an RRC connection state in a network where the first user identity is located, and is in an RRC idle state or an RRC inactive state in a network where the second user identity is located;

a processing module 1210, configured to determine a fourth message according to the third message, where the fourth message is a fourth message in a random access procedure corresponding to the second user identity, and the fourth message is used to respond to the third message;

A sending module 1220, configured to send the fourth message to the terminal device of the first user identity.

As an optional implementation manner, the receiving module 1230 is further configured to receive a fifth message in a random access procedure corresponding to the second user identity from the second user identity, where the fifth message is used to indicate that establishment, reestablishment or restoration of the RRC connection with the second user identity is completed.

As an alternative to this embodiment of the present invention,

The receiving module 1230 is further configured to receive, before receiving first information from a terminal device of a first user identity, the first information from the terminal device of the first user identity, where the first information includes a random access preamble in a random access procedure corresponding to the second user identity;

The sending module 1220 is further configured to send second information to the terminal device of the first user identity, where the second information is used to respond to the first information, and the second information includes the second time advance, where the second time advance is not equal to the first time advance, and the second network device is a network device where the terminal device resides with the second user identity.

As an alternative embodiment, the receiving module 1230 is configured to receive the first information from the terminal device of the first user identity by one or more of the following:

Receiving the first information transmitted by a fourth physical resource from the terminal device of the first user identity, where the fourth physical resource is different from a third physical resource, and the third physical resource is used for the terminal device to send, to a first network device 1200, a random access preamble corresponding to the first user identity with the first user identity; or alternatively, the first and second heat exchangers may be,

The fifth information includes an identification of the second user identity.

As an alternative embodiment, the receiving module 1230 is configured to receive the third message from the terminal device of the first user identity in one or more of the following manners:

Receiving the third message transmitted by a second SRB from the terminal device of the first user identity, where the second SRB is different from the first SRB, and the first SRB is used for the terminal device to send information corresponding to the first user identity to the first network device 1200 with the first user identity; or alternatively, the first and second heat exchangers may be,

Receiving the third message transmitted from the terminal device of the first user identity through a second logical channel corresponding to a first SRB, where the second logical channel is different from a first logical channel, and the first logical channel is used for the terminal device to send information corresponding to the first user identity to the first network device 1200 with the first user identity; or alternatively, the first and second heat exchangers may be,

And receiving the third message transmitted from the terminal device with the first user identity through a second physical resource, wherein the second physical resource is different from the first physical resource, and the first physical resource is used for the terminal device to send information corresponding to the first user identity to the first network device 1200 with the first user identity.

As an alternative embodiment, the sending module 1220 is configured to send the fourth message to the terminal device of the first user identity in one or more of the following manners:

Transmitting the fourth message to a terminal device of the first user identity through a fourth SRB, where the fourth SRB is different from a third SRB, and the third SRB is used for the terminal device to receive, with the first user identity, information corresponding to the first user identity from the first network device 1200; or alternatively, the first and second heat exchangers may be,

Transmitting the fourth message to the first user identity through a fourth logical channel corresponding to a third SRB, where the fourth logical channel is different from a third logical channel, and the third logical channel is used for the terminal device to receive, with the first user identity, information corresponding to the first user identity from the first network device 1200; or alternatively, the first and second heat exchangers may be,

And sending the fourth message to the terminal device of the first user identity through a second physical resource, where the second physical resource is different from the first physical resource, and the first physical resource is used for the terminal device to receive, with the first user identity, information corresponding to the first user identity from the first network device 1200.

As an optional implementation manner, the fourth message includes second indication information, where the second indication information is used to instruct the terminal device to communicate in a second network with the second user identity, or is used to instruct the terminal device to communicate in a first network with the second user identity, where the second network is a network corresponding to the second user identity, and the first network is a network corresponding to the first user identity.

It should be appreciated that the processing module 1210 in embodiments of the present application may be implemented by a processor or processor-related circuit component, the transmitting module 1220 may be implemented by a transmitter or transmitter-related circuit component, and the receiving module 1230 may be implemented by a receiver or receiver-related circuit component.

The embodiment of the application also provides a communication device which can be a terminal device or a circuit. The communication means may be adapted to perform the actions performed by the terminal device in the above-described method embodiments.

Fig. 13 shows a simplified schematic diagram of the structure of a terminal device when the communication device is a terminal device. For easy understanding and convenient illustration, in fig. 13, a mobile phone is taken as an example of the terminal device. As shown in fig. 13, the terminal device includes a processor, a memory, a radio frequency circuit, an antenna, and an input-output device. The processor is mainly used for processing communication protocols and communication data, controlling the terminal equipment, executing software programs, processing data of the software programs and the like. The memory is mainly used for storing software programs and data. The radio frequency circuit is mainly used for converting a baseband signal and a radio frequency signal and processing the radio frequency signal. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are mainly used for receiving data input by a user and outputting data to the user. It should be noted that some kinds of terminal apparatuses may not have an input/output device.

When data need to be sent, the processor carries out baseband processing on the data to be sent and then outputs a baseband signal to the radio frequency circuit, and the radio frequency circuit carries out radio frequency processing on the baseband signal and then sends the radio frequency signal outwards in the form of electromagnetic waves through the antenna. When data is sent to the terminal equipment, the radio frequency circuit receives a radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data. For ease of illustration, only one memory and processor is shown in fig. 13. In an actual end device product, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or storage device, etc. The memory may be provided separately from the processor or may be integrated with the processor, as the embodiments of the application are not limited in this respect.

In the embodiment of the present application, the antenna and the radio frequency circuit with the transmitting and receiving functions may be regarded as a transmitting and receiving unit of the terminal device (the transmitting and receiving unit may be one functional unit capable of implementing the transmitting function and the receiving function, or the transmitting and receiving unit may also include two functional units, that is, a receiving unit capable of implementing the receiving function and a transmitting unit capable of implementing the transmitting function, respectively), and the processor with the processing function may be regarded as a processing unit of the terminal device. As shown in fig. 13, the terminal device includes a transceiving unit 1310 and a processing unit 1320. The transceiver unit may also be referred to as a transceiver, transceiver device, etc. The processing unit may also be called a processor, a processing board, a processing module, a processing device, etc. Alternatively, the device for implementing the receiving function in the transceiver unit 1310 may be regarded as a receiving unit, and the device for implementing the transmitting function in the transceiver unit 1310 may be regarded as a transmitting unit, that is, the transceiver unit 1310 includes a receiving unit and a transmitting unit. The transceiver unit may also be referred to as a transceiver, transceiver circuitry, or the like. The receiving unit may also be referred to as a receiver, or receiving circuit, among others. The transmitting unit may also sometimes be referred to as a transmitter, or a transmitting circuit, etc.

It should be understood that, the transceiver unit 1310 is configured to perform the transmitting operation and the receiving operation on the terminal device side in the above-described method embodiment, and the processing unit 1320 is configured to perform other operations on the terminal device other than the transceiver operation in the above-described method embodiment.

For example, in one implementation, the transceiver unit 1310 is configured to perform all transmit and receive operations of the terminal device in the embodiment shown in fig. 5, e.g., S501 and S504, and/or the transceiver unit 1310 is also configured to perform other processes that support the techniques described herein. A processing unit 1320 for performing all operations performed by the terminal device in the embodiment shown in fig. 5, except for transceiving operations, such as generating first information, etc., and/or the processing unit 1320 is also for performing other processes supporting the techniques described herein.

As another example, in one implementation, the transceiver unit 1310 is configured to perform all of the transmitting and receiving operations of the terminal device in the embodiment shown in fig. 6, e.g., S601 and S604, and/or the transceiver unit 1310 is also configured to perform other processes supporting the techniques described herein. A processing unit 1320, configured to perform all operations performed by the terminal device in the embodiment shown in fig. 6, except for the transceiving operation, such as generating a third message in a random access procedure corresponding to the second user identity, and/or the processing unit 1320 is further configured to perform other procedures supporting the techniques described herein.

When the communication device is a chip-like device or circuit, the device may comprise a transceiver unit and a processing unit. The receiving and transmitting unit can be an input and output circuit and/or a communication interface; the processing unit is an integrated processor or microprocessor or integrated circuit.

When the communication apparatus in this embodiment is a terminal device, reference may be made to the device shown in fig. 14. As an example, the device may perform functions similar to the processing module 910 of fig. 9. As another example, the device may perform functions similar to those of the processing module 1110 of FIG. 11. In fig. 14, the apparatus includes a processor 1410, a transmit data processor 1420, and a receive data processor 1430. The processing module 910 in the above embodiment may be the processor 1410 in fig. 14, and perform the corresponding functions; the transmission module 920 in the above embodiment may be the transmission data processor 1420 in fig. 14, and perform corresponding functions; the receiving module 930 in the above embodiment may be the received data processor 1430 in fig. 14, and performs the corresponding functions. While a channel encoder, a channel decoder are shown in fig. 14, it is to be understood that these modules are not limiting illustrations of the present embodiment, but are merely schematic.

Fig. 15 shows another form of the present embodiment. The processing device 1500 includes a modulation subsystem, a central processing subsystem, a peripheral subsystem, and the like. The communication device in this embodiment may act as a modulation subsystem therein. In particular, the modulation subsystem may include a processor 1503, an interface 1504. The processor 1503 performs the functions of the processing module 910, and the interface 1504 performs the functions of the sending module 920 and/or the receiving module 930. Or the processor 1503 performs the functions of the processing module 1110, and the interface 1504 performs the functions of the sending module 1120 and/or the receiving module 1130. As another modification, the modulation subsystem includes a memory 1506, a processor 1503, and a program stored in the memory 1506 and executable on the processor, where the processor 1503 implements the method on the terminal device side in the above method embodiment when executing the program. It is noted that the memory 1506 may be non-volatile or volatile, and may be located within the modulation subsystem or within the processing device 1500, so long as the memory 1506 is coupled to the processor 1503.

When the apparatus in the embodiment of the present application is a network device, the apparatus may be as shown in fig. 16. The apparatus 1600 includes one or more radio frequency units, such as a remote radio frequency unit (remote radio unit, RRU) 1610 and one or more baseband units (BBU) (also referred to as digital units, DUs) 1620. The RRU1610 may be referred to as a transceiver module, which may include a transmitting module and a receiving module. The transmitting module corresponds to the transmitting module 1020 in fig. 10, and the receiving module corresponds to the receiving module 1030 in fig. 10; or the transmission module corresponds to the transmission module 1220 in fig. 12, and the reception module corresponds to the reception module 1230 in fig. 12. Alternatively, the transceiver module may also be referred to as a transceiver, transceiver circuitry, or transceiver, etc., which may include at least one antenna 1611 and a radio frequency unit 1612. The RRU1610 part is mainly used for receiving and transmitting radio frequency signals and converting radio frequency signals into baseband signals, for example, for sending indication information to a terminal device. The BBU1610 portion is mainly configured to perform baseband processing, control a base station, and the like. The RRU1610 and BBU1620 may be physically located together or may be physically separate, i.e., a distributed base station.

The BBU 1620 is a control center of the base station, and may also be referred to as a processing module, and may correspond to the processing module 1010 in fig. 10, or may correspond to the processing module 1210 in fig. 12, and is mainly configured to perform baseband processing functions, such as channel coding, multiplexing, modulation, spreading, and so on. For example, the BBU (processing module) may be configured to control the base station to perform the operation procedure related to the network device in the above method embodiment, for example, generate the above indication information, etc.

In one example, the BBU 1620 may be configured by one or more boards, where the multiple boards may support a single access radio access network (such as an LTE network) together, or may support different access radio access networks (such as an LTE network, a 5G network, or other networks) respectively. The BBU 1620 also includes a memory 1621 and a processor 1622. The memory 1621 is used to store the necessary instructions and data. The processor 1622 is configured to control the base station to perform necessary actions, for example, to control the base station to perform the operation procedures related to the network device in the above-described method embodiment. The memory 1621 and processor 1622 may be implemented to service one or more boards. That is, the memory and the processor may be separately provided on each board. It is also possible that multiple boards share the same memory and processor. In addition, each single board can be provided with necessary circuits.

The embodiment of the application provides a first communication system. The first communication system may comprise at least one of the terminal devices referred to in the embodiment shown in fig. 5 and the first network device referred to in the embodiment shown in fig. 5. The terminal device is, for example, the terminal device 900 in fig. 9. The first network device is, for example, the first network device 1000 in fig. 10.

The embodiment of the application provides a second communication system. The second communication system may comprise at least one of the terminal devices referred to in the embodiment shown in fig. 5 and the first network device referred to in the embodiment shown in fig. 5. The terminal device is, for example, the terminal device 1100 in fig. 11. The first network device is, for example, first network device 1200 in fig. 12.

The first communication system and the second communication system may be the same communication system or different communication systems.

The embodiment of the application also provides a computer readable storage medium, which is used for storing a computer program, and when the computer program is executed by a computer, the computer can implement the flow related to the terminal device in the embodiment shown in fig. 5 and provided by the embodiment of the method.

The embodiment of the present application further provides a computer readable storage medium, where a computer program is stored, where the computer program when executed by a computer may implement the flow related to the first network device in the embodiment shown in fig. 5 and provided by the foregoing method embodiment.

The embodiment of the application also provides a computer readable storage medium, which is used for storing a computer program, and when the computer program is executed by a computer, the computer can implement the flow related to the terminal device in the embodiment shown in fig. 6 and provided by the embodiment of the method.

The embodiment of the present application further provides a computer readable storage medium, where a computer program is stored, where the computer program when executed by a computer may implement the flow related to the first network device in the embodiment shown in fig. 6 provided by the foregoing method embodiment.

The embodiment of the application also provides a computer program product, which is used for storing a computer program, and when the computer program is executed by a computer, the computer can realize the flow related to the terminal device in the embodiment shown in fig. 5 provided by the embodiment of the method.

Embodiments of the present application also provide a computer program product, where the computer program product is configured to store a computer program, where the computer program when executed by a computer may implement the flow related to the first network device in the embodiment shown in fig. 5 provided by the foregoing method embodiment.

The embodiment of the application also provides a computer program product, which is used for storing a computer program, and when the computer program is executed by a computer, the computer can implement the flow related to the terminal device in the embodiment shown in fig. 6 provided by the embodiment of the method.

Embodiments of the present application also provide a computer program product, where the computer program product is configured to store a computer program, where the computer program when executed by a computer may implement the flow related to the first network device in the embodiment shown in fig. 6 provided by the foregoing method embodiment.

It should be appreciated that the processor referred to in the embodiments of the present application may be a CPU, but may also be other general purpose processors, digital Signal Processors (DSPs), application Specific Integrated Circuits (ASICs), off-the-shelf programmable gate arrays (field programmable GATE ARRAY, FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It should also be understood that the memory referred to in embodiments of the present application may be volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an erasable programmable ROM (erasable PROM), an electrically erasable programmable EPROM (EEPROM), or a flash memory. The volatile memory may be random access memory (random access memory, RAM) which acts as external cache memory. By way of example, and not limitation, many forms of RAM are available, such as static random access memory (STATIC RAM, SRAM), dynamic random access memory (DYNAMIC RAM, DRAM), synchronous Dynamic Random Access Memory (SDRAM), double data rate synchronous dynamic random access memory (doubledata RATE SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (ENHANCED SDRAM, ESDRAM), synchronous link dynamic random access memory (SYNCHLINK DRAM, SLDRAM), and direct memory bus random access memory (direct rambus RAM, DR RAM).

It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, the memory (storage module) is integrated into the processor.

It should be noted that the memory described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

It should be understood that, in various embodiments of the present application, the sequence numbers of the foregoing processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic thereof, and should not constitute any limitation on the implementation process of the embodiments of the present application.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a read-only memory (ROM), a random access memory (random access memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely a specific implementation of the present application, but the scope of the embodiments of the present application is not limited thereto, and any person skilled in the art may easily think about changes or substitutions within the technical scope of the embodiments of the present application, and all changes and substitutions are included in the scope of the embodiments of the present application. Therefore, the protection scope of the embodiments of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of communication, the method being adapted for a terminal device supporting a first user identity and a second user identity, the method comprising:

Transmitting first information to first network equipment by using a first user identity, wherein the first information comprises second information and third information, the terminal equipment is in a Radio Resource Control (RRC) connection state in a network where the first user identity is located, is in an RRC idle state or an RRC inactive state in the network where the second user identity is located, the second information is used for requesting establishment of an RRC connection by using the second user identity, the third information is used for indicating establishment of the RRC connection by using the second user identity is completed, or the second information is used for requesting establishment of the RRC connection by using the second user identity, the third information is used for indicating establishment of the RRC connection by using the second user identity is completed, or the second information is used for requesting restoration of the RRC connection by using the second user identity, and the third information is used for indicating restoration of the RRC connection by using the second user identity is completed;

Fourth information is received from the first network device with the first user identity, the fourth information being for responding to the first information.

2. The method of claim 1, wherein the second information is information included in a third message in a random access procedure corresponding to the second user identity, and the third message is an RRC establishment request message, an RRC reestablishment request message, or an RRC recovery request message.

3. The method according to claim 1 or 2, wherein the third information is information included in a fifth message in a random access procedure corresponding to the second user identity, the fifth message being an RRC establishment complete message, an RRC reestablishment complete message or an RRC recovery complete message.

4. The method according to claim 1 or 2, wherein receiving fourth information from the first network device with the first user identity comprises:

the fourth information is transmitted through an RRC reconfiguration message.

5. The method according to claim 1 or 2, further comprising, prior to transmitting the first information to the first network device with the first user identity:

6. The method of claim 5, wherein determining to transmit the first information to the first network device with the first user identity comprises:

7. The method of claim 6, further comprising, prior to transmitting the first information to the first network device with the first user identity:

8. The method of claim 7, wherein transmitting fifth information to the first network device with the first user identity comprises one or more of:

The fifth information includes an identification of the second user identity.

9. The method of any of claims 1,2, 6-8, wherein transmitting the first information to the first network device with the first user identity comprises one or more of:

transmitting the first information to the first network device by using the first user identity and using a second Signaling Radio Bearer (SRB), wherein the second SRB is different from a first SRB, and the first SRB is used for transmitting information corresponding to the first user identity to the first network device by using the first user identity; or alternatively, the first and second heat exchangers may be,

10. The method of any of claims 1,2, 6-8, wherein receiving fourth information from the first network device with the first user identity comprises one or more of:

11. The method according to any of claims 1,2, 6-8, wherein the fourth information comprises second indication information for indicating that the terminal device communicates in a second network with the second user identity or for indicating that the terminal device communicates in a first network with the second user identity, the second network being a network to which the second user identity corresponds, the first network being a network to which the first user identity corresponds.

12. A method of communication, the method comprising:

Receiving first information of terminal equipment from a first user identity, wherein the first information comprises second information and third information, the terminal equipment supports the first user identity and the second user identity, the terminal equipment is in an RRC connection state in a network where the first user identity is located, the terminal equipment is in an RRC idle state or an RRC inactive state in the network where the second user identity is located, the second information is used for requesting to establish the RRC connection with the second user identity, the third information is used for requesting to reestablish the RRC connection with the second user identity, or the second information is used for requesting to reestablish the RRC connection with the second user identity, the third information is used for requesting to reestablish the RRC connection with the second user identity, or the second information is used for requesting to resume the RRC connection with the second user identity, and the third information is used for requesting to resume the RRC connection with the second user identity;

determining fourth information according to the first information, wherein the fourth information is used for responding to the first information;

and sending the fourth information to the terminal equipment of the first user identity.

13. The method of claim 12, wherein the second information is information included in a third message in a random access procedure corresponding to the second user identity, and the third message is an RRC establishment request message, an RRC reestablishment request message, or an RRC recovery request message.

14. The method according to claim 12 or 13, wherein the third information is information included in a fifth message in a random access procedure corresponding to the second user identity, the fifth message being an RRC establishment complete message, an RRC reestablishment complete message or an RRC recovery complete message.

15. The method according to claim 12 or 13, characterized in that sending the fourth information to the terminal device of the first user identity comprises:

the fourth information is transmitted through an RRC reconfiguration message.

16. The method according to claim 12 or 13, characterized in that before receiving the first information from the terminal device of the first user identity, further comprising:

And sending sixth information to the terminal equipment of the first user identity, wherein the sixth information is used for responding to the fifth information, and the sixth information comprises a second time advance, wherein the second time advance is unequal to a first time advance, the first time advance is a time advance corresponding to the communication of the terminal equipment in the first network equipment in the first user identity, the second time advance is a time advance corresponding to the communication of the terminal equipment in the second network equipment in the second user identity, and the second network equipment is a network equipment in which the terminal equipment resides in the second user identity.

17. The method of claim 16, wherein receiving fifth information from the terminal device of the first user identity comprises one or more of:

The fifth information includes an identification of the second user identity.

18. A method according to claim 12, 13 or 17, characterized in that the first information from the terminal device of the first user identity is received, comprising one or more of the following:

Receiving the first information transmitted by a second SRB from the terminal equipment of the first user identity, wherein the second SRB is different from a first SRB, and the first SRB is used for the terminal equipment to send information corresponding to the first user identity to a first network equipment by the first user identity; or alternatively, the first and second heat exchangers may be,

Receiving the first information transmitted by a terminal device of the first user identity through a second logic channel corresponding to a first SRB, wherein the second logic channel is different from a first logic channel, and the first logic channel is used for the terminal device to send the information corresponding to the first user identity to a first network device through the first user identity; or alternatively, the first and second heat exchangers may be,

And receiving the first information transmitted by a second physical resource from the terminal equipment of the first user identity, wherein the second physical resource is different from the first physical resource, and the first physical resource is used for the terminal equipment to send the information corresponding to the first user identity to a first network equipment by the first user identity.

19. A method according to claim 12, 13 or 17, characterized in that the sending of the fourth information to the terminal device of the first user identity comprises one or more of the following:

Transmitting the fourth information to a terminal device of the first user identity through a fourth SRB, wherein the fourth SRB is different from a third SRB, and the third SRB is used for receiving information corresponding to the first user identity from a first network device by the terminal device according to the first user identity; or alternatively, the first and second heat exchangers may be,

20. The method according to claim 12, 13 or 17, wherein the fourth information comprises second indication information for indicating that the terminal device communicates in a second network with the second user identity or for indicating that the terminal device communicates in a first network with the second user identity, the second network being a network to which the second user identity corresponds, the first network being a network to which the first user identity corresponds.

21. A communication device, comprising:

A sending module, configured to send first information to a first network device with a first user identity, where the first information includes second information and third information, where the communication device supports the first user identity and the second user identity, the communication device is in an RRC connection state in a network where the first user identity is located, and is in an RRC idle state or an RRC inactive state in a network where the second user identity is located, where the second information is used to request establishment of an RRC connection with the second user identity, the third information is used to indicate establishment of an RRC connection with the second user identity is completed, or the second information is used to request restoration of an RRC connection with the second user identity, and the third information is used to indicate restoration of an RRC connection with the second user identity is completed;

And the receiving module is used for receiving fourth information from the first network equipment with the first user identity, and the fourth information is used for responding to the first information.

22. The communication apparatus according to claim 21, wherein the second information is information included in a third message in a random access procedure corresponding to the second user identity, and the third message is an RRC establishment request message, an RRC reestablishment request message, or an RRC recovery request message.

23. The communication apparatus according to claim 21 or 22, wherein the third information is information included in a fifth message in a random access procedure corresponding to the second user identity, the fifth message being an RRC establishment complete message, an RRC reestablishment complete message or an RRC recovery complete message.

24. The communication apparatus according to claim 21 or 22, wherein the receiving module is configured to receive fourth information from the first network device with the first user identity by:

the fourth information is transmitted through an RRC reconfiguration message.

25. The communication apparatus according to claim 21 or 22, further comprising a processing module for determining to send the first information to the first network device with the first user identity before sending the first information to the first network device with the first user identity.

26. The communication apparatus of claim 25, wherein the processing module is configured to determine to send the first information to the first network device with the first user identity by:

Determining to send the first information to a first network device according to the difference between a first time advance and a second time advance being less than or equal to a first threshold, wherein the first time advance is a time advance corresponding to the communication device communicating in the first network device with the first user identity, the second time advance is a time advance corresponding to the communication device communicating in a second network device with the second user identity, and the second network device is a network device where the communication device resides with the second user identity; or alternatively, the first and second heat exchangers may be,

27. The communication device of claim 26, wherein the communication device is configured to,

The receiving module is further configured to receive, with the first user identity, sixth information from the first network device, where the sixth information is used to respond to the fifth information, and the sixth information includes the second time advance, where the second time advance is not equal to the first time advance, and the second network device is a network device where the communication device resides with the second user identity.

28. The communication apparatus according to claim 27, wherein the sending module is configured to send fifth information to the first network device in the first user identity by one or more of:

The fifth information includes an identification of the second user identity.

29. The communication apparatus according to any of claims 21, 22, 26-28, wherein the sending module is configured to send the first information to the first network device with the first user identity by one or more of:

30. The communication apparatus according to any of claims 21, 22, 26-28, wherein the receiving module is configured to receive fourth information from the first network device with the first user identity by one or more of:

31. A communication device according to any of claims 21, 22, 26-28, wherein the fourth information comprises second indication information for indicating that the communication device is communicating in a second network with the second user identity or for indicating that the communication device is communicating in a first network with the second user identity, the second network being a network to which the second user identity corresponds, the first network being a network to which the first user identity corresponds.

32. A network device, comprising:

A receiving module, configured to receive first information from a communication device of a first user identity, where the first information includes second information and third information, where the communication device supports the first user identity and the second user identity, where the communication device is in an RRC connection state in a network where the first user identity is located, and where the communication device is in an RRC idle state or an RRC inactive state in a network where the second user identity is located, where the second information is used to request establishment of an RRC connection with the second user identity, the third information is used to indicate establishment of an RRC connection with the second user identity is complete, or where the second information is used to request establishment of an RRC connection with the second user identity is complete, and the third information is used to indicate establishment of an RRC connection with the second user identity is complete, or where the second information is used to request restoration of an RRC connection with the second user identity is complete;

And the sending module is used for sending the fourth information to the communication device of the first user identity.

33. The network device of claim 32, wherein the second information is information included in a third message in a random access procedure corresponding to the second user identity, and the third message is an RRC establishment request message, an RRC reestablishment request message, or an RRC recovery request message.

34. The network device according to claim 32 or 33, wherein the third information is information included in a fifth message in a random access procedure corresponding to the second user identity, the fifth message being an RRC establishment complete message, an RRC reestablishment complete message or an RRC recovery complete message.

35. The network apparatus according to claim 32 or 33, wherein transmitting the fourth information to the communication device of the first user identity comprises:

the fourth information is transmitted through an RRC reconfiguration message.

36. The network device of claim 32 or 33, wherein the network device,

The receiving module is further configured to receive fifth information from the communication device of the first user identity before receiving first information from the communication device of the first user identity, where the fifth information includes a random access preamble in a random access procedure corresponding to the second user identity;

And sending sixth information to the communication device of the first user identity, where the sixth information is used to respond to the fifth information, and the sixth information includes a second time advance, where the second time advance is unequal to a first time advance, the first time advance is a time advance corresponding to communication of the terminal device in the network device with the first user identity, the second time advance is a time advance corresponding to communication of the terminal device in the second network device with the second user identity, and the second network device is a network device where the communication device resides with the second user identity.

37. The network device of claim 36, wherein the receiving module is configured to receive the fifth information from the communication means of the first user identity by one or more of:

Receiving the fifth information transmitted by a fourth physical resource from the communication device of the first user identity, wherein the fourth physical resource is different from a third physical resource, and the third physical resource is used for the communication device to send a random access preamble corresponding to the first user identity to the network equipment by the first user identity; or alternatively, the first and second heat exchangers may be,

The fifth information includes an identification of the second user identity.

38. The network apparatus of claim 32, 33 or 37, wherein the receiving module is configured to receive the first information from the communication device of the first user identity by one or more of:

Receiving the first information transmitted by a second SRB from a communication device of the first user identity, wherein the second SRB is different from a first SRB, and the first SRB is used for the communication device to send information corresponding to the first user identity to the network equipment by using the first user identity; or alternatively, the first and second heat exchangers may be,

Receiving the first information transmitted from the communication device of the first user identity through a second logic channel corresponding to a first SRB, wherein the second logic channel is different from a first logic channel, and the first logic channel is used for the communication device to send the information corresponding to the first user identity to the network equipment by using the first user identity; or alternatively, the first and second heat exchangers may be,

The first information transmitted by a second physical resource from the communication device of the first user identity is received, wherein the second physical resource is different from the first physical resource, and the first physical resource is used for the communication device to send the information corresponding to the first user identity to the network equipment by the first user identity.

39. The network device according to claim 32, 33 or 37, wherein the sending module is configured to send the fourth information to the communication means of the first user identity by one or more of:

Transmitting the fourth information to a communication device of the first user identity through a fourth SRB, wherein the fourth SRB is different from a third SRB, and the third SRB is used for the communication device to receive information corresponding to the first user identity from the network equipment with the first user identity; or alternatively, the first and second heat exchangers may be,

Transmitting the fourth information to the first user identity through a fourth logical channel corresponding to a third SRB, the fourth logical channel being different from a third logical channel, the third logical channel being used by the communication device to receive information corresponding to the first user identity from the network device with the first user identity; or alternatively, the first and second heat exchangers may be,

And transmitting the fourth information to the communication device of the first user identity through a second physical resource, wherein the second physical resource is different from the first physical resource, and the first physical resource is used for the communication device to receive information corresponding to the first user identity from the network equipment through the first user identity.

40. The network device according to claim 32, 33 or 37, wherein the fourth information comprises second indication information for indicating that the communication means communicates in a second network with the second user identity or for indicating that the communication means communicates in a first network with the second user identity, the second network being a network to which the second user identity corresponds, the first network being a network to which the first user identity corresponds.

41. A communication system comprising a communication device according to any of claims 21 to 31 and a network apparatus according to any of claims 32 to 40.

42. A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program, which when run on a computer causes the computer to perform the method according to any one of claims 1 to 11 or causes the computer to perform the method according to any one of claims 12 to 20.

43. A computer program product, characterized in that the computer program product comprises a computer program which, when run on a computer, causes the computer to perform the method of any one of claims 1 to 11 or causes the computer to perform the method of any one of claims 12 to 20.