WO2021047479A1

WO2021047479A1 - Communication method and apparatus

Info

Publication number: WO2021047479A1
Application number: PCT/CN2020/113829
Authority: WO
Inventors: 肖洁华; 李新县; 唐浩; 王轶
Original assignee: 华为技术有限公司
Priority date: 2019-09-09
Filing date: 2020-09-07
Publication date: 2021-03-18
Also published as: CN112469107A; CN112469107B

Abstract

The present application relates to the technical field of communications, and disclosed are a communication method and apparatus, wherein the method may comprise: a terminal device uses a first user identity to receive control information sent by a first network device, the control information being used to indicate to use a second user identity to randomly access a cell of a second network device, and the first network device being a network device connected by the terminal device using the first user identity; and then using the second user identity to randomly access the cell of the second network device. By using the described method, the terminal device may trigger the initiation of random access by using the second user identity according to the control information received from the first network device using the first user identity, thereby providing a new random access method for a terminal device that supports at least two user identities. When the terminal device is configured with only one radio frequency Rx path, the described method is used to trigger the initiation of the random access process using the second user identity, which may effectively shorten the interruption time of services related to the first user identity.

Description

Communication method and device

Cross-references to related applications

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office, the application number is 201910849492.4, and the application name is "a communication method and device" on September 9, 2019, the entire content of which is incorporated into this application by reference.

Technical field

This application relates to the field of communication technology, and in particular to a communication method and device.

Background technique

With the development of communication technology, many terminal devices (such as mobile phones) have the function of supporting multiple subscriber identification modules (SIM). Taking the terminal device supporting two SIM cards as an example, there are many possible implementations, such as dual SIM single standby (DSSS), dual SIM dual standby (DSDS), dual SIM dual pass (Dual SIM dual active, DSDA).

Among them, DSSS indicates that although there are two SIM cards in the terminal device, they can only reside in the network to which one SIM card belongs at the same time, and the user can choose to reside in the network to which different SIM cards belong at different times. DSDS means that the terminal device can reside in the networks to which two SIMs belong at the same time, but only one network to which the SIM card belongs is in communication at the same time. For example, when one SIM card is used to surf the Internet, the other SIM cannot be used to answer calls. DSDA indicates that the terminal device can not only reside in the network to which multiple SIM cards belong at the same time, but can also communicate in the network to which multiple SIM cards belong at the same time. For example, when one SIM card is used to surf the Internet, another SIM card can also be used to answer calls.

For reasons of cost efficiency, the radio frequency resources and/or baseband resources of the terminal device can be shared between the two SIM cards of the terminal device. In this case, how the terminal device initiates a random access procedure still needs further research.

Summary of the invention

In view of this, the present application provides a communication method and device for terminal devices that support at least two user identities, enabling the terminal device to initiate a random access process with one of the user identities.

In the first aspect, the embodiments of the present application provide a communication method, which can be applied to a terminal device. The terminal device supports at least two user identities, and the at least two user identities include a first user identity and a second user identity. User identity, the method includes: receiving control information sent by the first network device as the first user identity, where the control information is used to indicate random access to a cell of the second network device as the second user identity ; Wherein, the first network device is a network device that the terminal device is connected to as the first user; according to the control information, randomly accesses the cell of the second network device as the second user.

Using the above method, the terminal device can trigger the random access process to be initiated as the second user according to the control information received from the first network device as the first user, thereby providing a terminal device that supports at least two user identities. A new random access method. Moreover, when the terminal device is configured with only one radio frequency Rx channel, the above method is used to trigger the initiation of the random access process with the identity of the second user, which can effectively shorten the interruption time of services related to the identity of the first user.

In a possible design, the control information includes an identifier corresponding to the second user identity.

In this way, since the control information includes the identity corresponding to the second user identity, after receiving the control information, the terminal device can recognize that the random access process needs to be initiated as the second user identity.

In a possible design, the control information is a downlink control channel command.

In a possible design, the control information is scrambled with a first wireless network temporary identifier, and the first wireless network temporary identifier is used to indicate that the control information is a downlink control channel command.

The scrambling of the first wireless network temporary identity can be scrambling for the newly defined wireless network temporary identity. Since the first wireless network temporary identity is used to indicate that the control information is a downlink control channel command, there is no need to carry it in the control information. The indication information indicates that the control information is a downlink control channel command, which is relatively simple to implement.

In a possible design, the method further includes: sending a first request to the first network device as the first user, and the first request is used to request random access as the second user. Into the cell of the second network device.

In this manner, the terminal device can trigger the random access process as the second user according to its own business requirements.

In a possible design, the method further includes: sending capability information to the first network device as the first user identity, where the capability information is used to indicate that the terminal device supports at least two user identities.

In this way, the terminal device reports the capability information to the first network device, so that the first network device can learn that the terminal device supports at least two user identities.

In a possible design, the method further includes: receiving the identity corresponding to the second user identity sent by the first network device as the first user identity.

In a possible design, the PLMN corresponding to the first user identity is the first PLMN; the method further includes: searching for the first PLMN according to the information corresponding to the second user identity; if the first PLMN If the cell signal strength of is greater than the first threshold, it is determined that the first PLMN is the PLMN corresponding to the second user identity. Wherein, the first network device and the second network device belong to the first PLMN.

Using the above method, when the terminal device selects the PLMN as the first user, it can be done independently. When the terminal device selects the PLMN as the second user, it can refer to the PLMN selected by the terminal device as the first user, so as to make the terminal device as The first user identity and the second user identity select the same PLMN.

In a possible design, the method further includes: searching for the first PLMN according to the information corresponding to the first user identity; searching for the first PLMN according to the information corresponding to the second user identity; If the cell signal strength of a PLMN is greater than or equal to the first threshold, it is determined that the PLMNs corresponding to the first user identity and the second user identity are both the first PLMN; wherein, the first network device and the The second network device belongs to the first PLMN.

Using the above method, when the terminal device performs PLMN selection with the identity of the first user and the identity of the second user, it can comprehensively consider the search results of the PLMN search with the identity of the first user and the search results of the PLMN search with the identity of the second user. The terminal device is made to select the same PLMN with the identity of the first user and the identity of the second user, so as to effectively avoid communication between network devices in different operator networks.

In a possible design, the first network device and the second network device are the same network device; the method further includes: if the first network device is searched according to the information corresponding to the second user identity The multiple cells of the PLMN include the cell of the first network device, and the cell of the first network device is a cell that can be camped on, then the cell of the first network device is camped on as the second user. .

Using the above method, when the terminal device performs cell selection as the first user, it can proceed independently. When the terminal device selects the cell as the second user, it can refer to the cell selected by the terminal device as the first user, so as to make the terminal device as good as possible. The first user identity and the second user identity select a cell of the same network device to effectively avoid communication between different network devices and save signaling overhead.

In a second aspect, embodiments of the present application provide a communication method, which may be applied to a first network device, and the method includes: communicating with the terminal in a communication network where the first user identity of the terminal device is located. The device establishes a connection; and sends control information to the terminal device, where the control information is used to instruct the terminal device to randomly access the cell of the second network device as the second user.

In a possible design, the method further includes: receiving a first request sent by the terminal device as the first user, and the first request is used to request the terminal device to use the second user The identity randomly accesses the cell of the second network device.

In a possible design, the control information includes first information, and the first information includes one or more of the following: random access sequence information, random access carrier information, SSB index information, and SSB index The associated RACH timing information and carrier identifier; the first request includes the identifier of the second network device; the method further includes: according to the identifier of the second network device, if it is determined that the second network device and If the first network device is a different network device, the first information is obtained from the second network device; the first information includes one or more of the following: random access sequence information, random access carrier Information, SSB index information, RACH timing information associated with the SSB index, and carrier identification.

In a possible design, the method further includes: receiving a second request sent by the second network device, where the second request is used to request the terminal device to randomly access the station as the second user. The cell of the second network device.

In a possible design, the method further includes: receiving capability information sent by the terminal device as the first user identity, where the capability information is used to indicate that the terminal device supports at least two user identities.

In a possible design, the method further includes: sending an identifier corresponding to the second user identity to the terminal device.

In a third aspect, the embodiments of the present application provide a communication method, which can be applied to a terminal device that supports at least two user identities, and the at least two user identities include a first user identity and a second user Identity, the method includes: searching for the first PLMN according to the information corresponding to the second user identity, where the first PLMN is the PLMN corresponding to the first user identity; If the cell signal strength is greater than the first threshold, it is determined that the first PLMN is the PLMN corresponding to the second user identity.

In a possible design, the method further includes: selecting the first cell of the first network device in the first PLMN; if the first PLMN is searched according to the information corresponding to the second user identity The multiple cells include the second cell of the first network device, and the second cell is a cell that can be camped on, the second cell is camped on as the second user.

In a possible design, the method further includes: if one or more cells of the first PLMN searched according to the information corresponding to the first user identity include the first cell of the first network device, And the one or more cells of the first PLMN searched according to the information corresponding to the second user identity include the second cell of the first network device, and the first cell and the second cell If they are all cells that can be camped on, they will camp on the first cell as the first user, and camp on the second cell as the second user.

In a fourth aspect, an embodiment of the present application provides a communication method, which may be applicable to a terminal device that supports at least two user identities, and the at least two user identities include a first user identity and a second user The method includes: searching for the first PLMN according to the information corresponding to the first user identity; searching for the first PLMN according to the information corresponding to the second user identity; if the cell signal strength of the first PLMN is greater than The first threshold, it is determined that the PLMNs corresponding to the first user identity and the second user identity are both the first PLMN.

In a fifth aspect, an embodiment of the present application provides a device that has the function of implementing the terminal equipment involved in the first, third, and fourth aspects mentioned above. For example, the device includes the terminal device executing the above-mentioned first aspect. One aspect, the third aspect, and the fourth aspect relate to the modules or units or means corresponding to the steps. The functions or units or means can be realized by software, or by hardware, or by hardware executing corresponding software. .

In a possible design, the device includes a processing unit and a communication unit, and the functions performed by the processing unit and the communication unit may correspond to the steps performed by the terminal device involved in the first, third, and fourth aspects described above.

In a possible design, the device includes a processor, and may also include a transceiver. The transceiver is used to send and receive signals. The processor executes program instructions to complete the first, third, and fourth aspects described above. The method executed by the terminal device in any possible design or implementation in the aspect.

Wherein, the device may further include one or more memories, and the memories are used for coupling with the processor. The one or more memories may be integrated with the processor, or may be provided separately from the processor, which is not limited in this application.

In a possible design, the memory stores necessary computer program instructions and/or data for realizing the functions of the terminal device involved in the first, third, and fourth aspects. The processor can execute the computer program instructions stored in the memory to complete the method executed by the terminal device in any possible design or implementation of the first aspect, the third aspect, and the fourth aspect.

In a sixth aspect, an embodiment of the present application provides a device that has the function of implementing the network device (such as the first network device) involved in the second aspect. For example, the device includes the first network device to perform the foregoing The second aspect relates to the modules or units or means corresponding to the steps. The functions or units or means can be realized by software, or by hardware, or by hardware executing corresponding software.

In a possible design, the device includes a processing unit and a communication unit, and the functions performed by the processing unit and the communication unit may correspond to the steps performed by the first network device involved in the above second aspect.

In a possible design, the device includes a processor, and may also include a transceiver. The transceiver is used to send and receive signals, and the processor executes program instructions to complete any possible design or implementation in the second aspect. The method executed by the first network device in the mode.

In a possible design, the memory stores necessary computer program instructions and/or data for realizing the functions of the first network device involved in the second aspect. The processor can execute the computer program instructions stored in the memory to complete the method executed by the first network device in any possible design or implementation of the second aspect.

In a seventh aspect, an embodiment of the present application provides a computer-readable storage medium that stores computer-readable instructions. When the computer reads and executes the computer-readable instructions, the computer executes the first Any one of the possible design methods from the aspect to the fourth aspect.

In an eighth aspect, the embodiments of the present application provide a computer program product. When the computer reads and executes the computer program product, the computer executes any of the possible design methods of the first to fourth aspects.

In a ninth aspect, an embodiment of the present application provides a chip, which is connected to a memory, and is used to read and execute a software program stored in the memory, so as to realize any one of the above-mentioned first aspect to the fourth aspect. The method in the design.

In a tenth aspect, an embodiment of the present application provides a communication system, including a terminal device in any one of the possible designs of the first aspect, the third aspect, and the fourth aspect, and a terminal device in any one of the possible designs in the second aspect. The first network device and the second network device.

Description of the drawings

Figure 1a is a schematic diagram of a communication system suitable for an embodiment of the present application;

FIG. 1b is a schematic diagram of a communication system in which the first network and the second network are the same network in an embodiment of the application;

FIG. 1c is a schematic diagram of a communication system in which the network device 101 and the network device 102 are the same network device in an embodiment of the application;

FIG. 1d is a schematic structural diagram of a terminal device provided by an embodiment of this application;

Fig. 1e is a simplified schematic diagram of the structure of the terminal device shown in Fig. 1d;

Figure 1f is a schematic diagram of a random access process provided by an embodiment of this application;

Figure 1g is a schematic diagram of service interruption using the existing method;

FIG. 1h is a schematic diagram of service interruption using the method provided by the embodiment of the present application;

2 is a schematic diagram of a flow corresponding to the communication method provided in Embodiment 1 of the application;

3 is a schematic diagram of a possible overall flow of the communication method provided in Embodiment 1 of this application;

FIG. 4 is a schematic diagram of a flow corresponding to the communication method provided in Solution 1 of the embodiment of the application; FIG.

FIG. 5 is a schematic diagram of a process corresponding to the communication method provided in the second embodiment of the application; FIG.

Fig. 6 is a possible exemplary block diagram of a device involved in an embodiment of the application;

FIG. 7 is a schematic structural diagram of a device provided by an embodiment of this application;

FIG. 8 is a schematic structural diagram of a terminal device provided by an embodiment of this application;

FIG. 9 is a schematic structural diagram of a network device provided by an embodiment of this application.

detailed description

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

First, some terms in the embodiments of the present application are explained to facilitate the understanding of those skilled in the art.

(1) Terminal equipment: It is a device with wireless transceiver function. Terminal equipment can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; it can also be deployed on the water (such as ships, etc.); it can also be deployed in the air (For example, airplanes, balloons, satellites, etc.). The terminal device may be a mobile phone (mobile phone), a tablet computer (pad), a computer with wireless transceiver function, virtual reality (VR) terminal equipment, augmented reality (AR) terminal equipment, industrial control ( Wireless terminal equipment in industrial control, wireless terminal equipment in self-driving, wireless terminal equipment in remote medical, wireless terminal equipment in smart grid, transportation safety (transportation) Wireless terminal equipment in safety), wireless terminal equipment in a smart city (smart city), wireless terminal equipment in a smart home (smart home), and may also include user equipment (UE), etc. The terminal device can also be a cellular phone, a cordless phone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (personal digital assistant, PDA), with wireless communication Functional handheld devices, computing devices, or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in the 5th generation (5G) network in the future, or public land mobile communication networks that will evolve in the future ( Public land mobile network (PLMN) terminal equipment, etc. Terminal equipment can sometimes be called terminal equipment, user equipment (UE), access terminal equipment, vehicle terminal equipment, industrial control terminal equipment, UE unit, UE station, mobile station, mobile station, remote station, remote terminal Equipment, mobile equipment, UE terminal equipment, terminal equipment, wireless communication equipment, UE agent or UE device, etc. The terminal device can also be fixed or mobile. The embodiment of the present application does not limit this.

In the embodiments of the present application, the device for realizing the function of the terminal device may be a terminal device, or a device capable of supporting the terminal device to realize the function, such as a chip system, and the device may be installed in the terminal device. In the embodiments of the present application, the chip system may be composed of chips, or may include chips and other discrete devices. In the technical solutions provided by the embodiments of the present application, the device used to implement the functions of the terminal is a terminal device as an example to describe the technical solutions provided by the embodiments of the present application.

(2) Network equipment: It can be an access network equipment, which can also be called a radio access network (RAN) equipment, which is a device that provides wireless communication functions for terminal equipment. The access network equipment includes, for example, but is not limited to: next-generation base stations (generation nodeB, gNB), evolved node B (evolved node B, eNB), radio network controller (RNC), node B ( node B, NB), base station controller (BSC), base transceiver station (BTS), home base station (for example, home evolved nodeB, or home node B, HNB), baseband unit (baseband unit) , BBU), transmitting and receiving point (TRP), transmitting point (TP), mobile switching center, etc. The access network equipment can also be a wireless controller, a centralized unit (CU), and/or a distributed unit (DU) in a cloud radio access network (cloud radio access network, CRAN) scenario, or a network The equipment may be a relay station, an access point, a vehicle-mounted device, a terminal device, a wearable device, and a network device in a future 5G network or a network device in a future evolved PLMN network. The terminal device can communicate with multiple access network devices of different technologies. For example, the terminal device can communicate with an access network device that supports long term evolution (LTE), or can communicate with an access network device that supports 5G. , It can also be dual-connected with LTE-supporting access network equipment and 5G-supporting access network equipment. The embodiments of the present application are not limited.

In the embodiments of the present application, the device used to implement the function of the network device may be a network device, or a device capable of supporting the network device to implement the function, such as a chip system, and the device may be installed in the network device. In the technical solutions provided in the embodiments of the present application, the device used to implement the functions of the network equipment is a network device as an example to describe the technical solutions provided in the embodiments of the present application.

(3) The terms "system" and "network" in the embodiments of this application can be used interchangeably. "At least one" means one or more, and "plurality" means two or more. "And/or" describes the association relationship of the associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone, where A, B can be singular or plural. The character "/" generally indicates that the associated objects before and after are in an "or" relationship. "The following at least one item (a)" or similar expressions refers to any combination of these items, including any combination of a single item (a) or a plurality of items (a). For example, at least one item (a) of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple .

And, unless otherwise specified, the ordinal numbers such as "first" and "second" mentioned in the embodiments of this application are used to distinguish multiple objects, and are not used to limit the order, timing, priority, or order of multiple objects. Importance.

To facilitate the understanding of the embodiments of the present application, first, the communication system shown in FIG. 1a is taken as an example to describe in detail the communication system applicable to the embodiments of the present application. Fig. 1a is a schematic diagram of a communication system suitable for the communication method of an embodiment of the present application. As shown in FIG. 1a, the first network includes a network device 101, and the second network includes a network device 102. The terminal device 103 can be registered in the first network and the second network. Exemplarily, the terminal device 103 may support two user identities (such as a first user identity and a second user identity). When the user identity of the terminal device 103 is the first user identity, from the perspective of the network side, The terminal device 103 can be understood as a user (that is, the first user); when the user identity of the terminal device 103 is the second user identity, from the perspective of the network side, the terminal device 103 can be understood as another user (that is, the second user). user). The terminal device 103 may be registered in the first network as the first user and registered in the second network as the second user. In the embodiment of the present application, the terminal device 103 supports two user identities, which can also be described as: the terminal device 103 has two user identities.

It should be noted that: (1) In Figure 1a, only the terminal device supports two user identities and is registered in two networks as an example. In other possible embodiments, the terminal device may also support more than two user identities. And can be registered in more than two networks. The embodiments of this application will mainly be described based on the terminal device supporting two user identities and registering on two networks. When the terminal device supports more than two user identities and registering on more than two networks, the specific implementation can refer to the terminal device Support two user identities, and register related descriptions in two networks.

(2) In the embodiments of this application, "user identity" (such as first user identity, second user identity) is a logical concept, for example, "user identity" can correspond to SIM card or subscriber information or virtual SIM card or user identity (Such as International Mobile Subscriber Identity (IMSI)/Temporary Mobile Subscriber Identity (TMSI)). From the perspective of the network side, different "user identities" logically correspond to different communication entities served by the network side. For example, a terminal device that supports two user identities is two communication entities on the network side. For another example, when the "user identity" corresponds to the SIM card or subscriber information, the network side will recognize two terminal devices that support different SIM cards or different subscriber information as two different communication entities, and will also support multiple different communication entities. The same terminal device with SIM card or multiple subscriber information is identified as multiple different communication entities, even in reality, the terminal device supporting multiple different SIM cards or multiple subscriber information is just one physical entity. In the embodiments of the present application, description will be made mainly by taking the "user identity" corresponding to the SIM card as an example.

Exemplarily, the SIM card can be understood as the key for the terminal device to access the mobile network. For ease of description, the SIM card and its evolution are collectively referred to as the SIM card in the embodiments of the present application. For example, a SIM card can be an identification card for a global system for mobile communications (GSM) digital mobile phone user, which is used to store the user's identification code and key, and support the authentication of the user by the GSM system; and For example, the SIM card may also be a universal subscriber identity module (USIM), which may also be referred to as an upgraded SIM card.

Exemplarily, the first network and the second network may be the same network, as shown in FIG. 1b. When the first network and the second network are the same network, the first network device and the second network device may be the same network device, as shown in FIG. 1c.

Regarding the system architecture shown in FIG. 1a, FIG. 1b, or FIG. 1c, it should be understood that the embodiment of the present application does not limit the number of network-side devices and the number of terminal-side devices in the system architecture, and the system to which the embodiment of the present application applies In addition to the network-side equipment and the terminal-side equipment, the architecture may also include other equipment, such as core network equipment, wireless relay equipment, and wireless backhaul equipment, which is not limited in the embodiment of the present application. In addition, the network-side device in the embodiment of the present application may integrate all functions in one independent physical device, or may distribute the functions on multiple independent physical devices, which is not limited in the embodiment of the present application. In addition, the terminal-side device in the embodiment of the present application may be connected to the network-side device in a wireless manner.

The system architecture shown above may be applicable to various radio access technology (RAT) communication systems, such as 5G communication systems and communication systems that may appear in the future. The system architecture and business scenarios described in the embodiments of this application are intended to more clearly illustrate the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided in the embodiments of this application. Those of ordinary skill in the art will know that with communication With the evolution of the system architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are equally applicable to similar technical problems.

Referring to FIG. 1d, there is shown a schematic structural diagram of a terminal device provided by an embodiment of the present application. The terminal device may be the terminal device 103 shown in FIG. 1a. As shown in Figure 1d, the terminal device 103 may include: a first SIM card interface 110, a second SIM card interface 120, a manager 140 coupled to the first SIM card interface 110 and the second SIM card interface 120, and a manager 140 is coupled to the processor 130, and the processor 130 is connected to the transceiver 150. The aforementioned processor 130 may be a baseband processor (baseband processor, BBP). As shown in FIG. 1d, the transceiver 150 includes a radio frequency receiving Rx1 channel and a radio frequency transmitting Tx1 channel. The first SIM card interface 110 is used to install the SIM card 1, and the second SIM card interface 120 is used to install the SIM card 2. The processor 130 may obtain information related to the SIM card 1 and/or information related to the SIM card 2 from the manager 140, where the information related to the SIM card 1 may include user identity information corresponding to the SIM card 1, which is similar to the SIM card 1. 2 related information may include user identity information corresponding to SIM card 2. Exemplarily, the processor 130 may send uplink data packets related to the service of the SIM card 1 on the radio frequency Tx1 channel according to the information related to the SIM card 1, or the processor 130 may according to the information related to the SIM card 2, The uplink data packet related to the service of the SIM card 2 is sent on the radio frequency Tx1 channel. And, the processor 130 may receive a downlink data packet related to the service of the SIM card 1 or a downlink data packet related to the service of the SIM card 2 on the radio frequency Rx1 path. See Figure 1e, which is a simplified schematic diagram of Figure 1d. In this case, it can be understood that the SIM card 1 and the SIM card 2 share the radio frequency Rx1 channel or the radio frequency Tx1 channel.

In the embodiment of the present application, the radio frequency Tx path may also be referred to as a transmitting radio frequency resource or a transmitter (Transmitter), and the radio frequency Rx path may also be referred to as a receiving radio frequency resource or a receiver (Receiver), which is not specifically limited.

Exemplarily, the terminal device 103 may be a terminal device that can support one or more operators' network standards, that is, the terminal device 103 can support one or more operators (such as one of China Unicom, China Mobile, and China Telecom). Multiple) networks. Taking the SIM card 1 as an example, the terminal device 103 obtains the identification code of the SIM card 1, selects and registers with the selected network with the user identity corresponding to the SIM card 1 (such as the first user identity) (it can also be briefly described as SIM card 1 Register to the network). After the registration is successful, the terminal device 103 can initiate a random access process with the user identity corresponding to the SIM card 1, and access the cell in the network device in the selected network (such as the network device 101 in the first network), and enter the connection State, and then send the uplink data packet of the service to the network device 101 and receive the downlink data packet sent by the network device 101. Taking the SIM card 2 as an example, the terminal device 103 obtains the identification code of the SIM card 2, selects and registers with the selected network with the user identity corresponding to the SIM card 2 (for example, the second user identity). After the registration is successful, the terminal device 103 can initiate a random access process with the user identity corresponding to the SIM card 2, and access the cell of the network device in the selected network (such as the network device 102 in the second network), and enter the connected state , And then send the uplink data packet of the service to the network device 102, and receive the downlink data packet sent by the network device 101.

The random access involved in the embodiments of the present application may be non-competitive random access. Figure 1f is a schematic diagram of the flow of non-competitive random access, as shown in Figure 1f, which may include:

Step 0: The network device sends a signaling for triggering random access to the terminal device. The signaling may include a random access preamble (random access preamble, RA preamble) allocated by the network device to the terminal device. In this embodiment of the application, the signaling used to trigger random access may be a downlink control channel order (order), such as a physical downlink control channel (physical downlink control channel, PDCCH) order, that is, a PDCCH order.

Step 1. The terminal device sends a random access request to the network device, and the random access request includes a random access preamble.

Step 2: The network device sends a random access response to the terminal device.

It should be noted that FIG. 1f is only a simple description of the random access process, and its specific implementation can be referred to the existing solution, which will not be repeated here.

According to the step process shown in Figure 1f, for the terminal device 103, if the terminal device 103 needs to initiate a random access process as the first user, it needs to first receive the PDCCH order1 sent by the network device 101; if the terminal device 103 needs to use When the second user identity initiates the random access process, it needs to first receive the PDCCH order2 sent by the network device 102.

In a possible scenario, taking the situation illustrated in Figure 1d and Figure 1e as an example, the terminal device 103 establishes a radio resource control (radio resource control, RRC) connection with the network device 101 as the first user. When the terminal device When 103 is receiving the downlink data sent by the network device 101 as the first user, if the terminal device 103 needs to trigger the random access process as the second user, since the terminal device 103 has only one radio frequency receiving channel, the terminal device 103 needs to be interrupted The service related to the identity of the first user uses the radio frequency receiving path to receive the PDCCH order sent by the network device 102. Referring to Figure 1g, it can be seen that in the completion of the random access process initiated by the second user identity, the radio frequency receiving path of the terminal device needs to be received in the network to which the second user identity belongs, resulting in services related to the first user identity A longer interruption will occur.

It should be noted that under normal circumstances, the terminal device works as the first user on the first frequency and as the second user on the second frequency. The first frequency is different from the second frequency. In this case, When the terminal device uses the radio frequency receiving channel to receive information as the first user, the radio frequency receiving channel works at the first frequency. When the terminal device uses the radio frequency receiving channel to receive information as the second user, the radio frequency receiving channel operates at the second frequency. Therefore, even if the network device 101 and the network device 102 in the above scenario are the same network device, the service interruption situation shown in FIG. 1g still occurs.

Based on this, an embodiment of the present application provides a communication method, which may include: a terminal device receives control information sent by a first network device as a first user, and the control information is used to instruct random access to the second user as a second user. 2. A cell of a network device. The first network device is a network device connected by the terminal device as the first user; and then randomly accesses the cell of the second network device as the second user. With this method, the terminal device can trigger the random access process to initiate the random access process as the second user based on the control information received from the first network device as the first user identity, thereby providing a terminal device that supports at least two user identities. A new random access method. When this method is applied to the above scenario, as shown in Figure 1h, the terminal device can use the radio frequency receiving path to receive the PDCCH order sent by the network device 101, and interrupt the first user when it needs to receive the random access response sent by the network device 102 Identity-related services can effectively reduce the interruption time of the first user's identity-related services and improve user experience.

Example one

Fig. 2 is a schematic diagram of the process corresponding to the communication method provided in the first embodiment of the application, as shown in Fig. 2, including:

Step 201: The terminal device establishes a connection with the first network device in the network to which the first user identity belongs.

Exemplarily, the terminal device may include a SIM card 1 and a SIM card 2, where the SIM card 1 corresponds to the first user identity of the terminal device, and the SIM card 2 corresponds to the second user identity of the terminal device. In an example, the networks to which the SIM card 1 and the SIM card 2 belong may be the same or different.

Exemplarily, the terminal device may randomly access a cell in the network to which it belongs (such as the first network) as the first user, for example, access the first network device (the first network device belongs to the first network device through a random access process). Network), and establishes a connection with the first network device, and the terminal device is in the RRC connected (RRC_Connected) state in the first network, or the terminal device is in the network to which the first user identity belongs to the first network device Stay connected.

In the embodiment of the present application, the first network device may obtain the capability information of the terminal device. For example, the first network device may send a capability enquiry message to the terminal device. Accordingly, after receiving the capability enquiry message, the terminal device may send the capability information to the first network device; for another example, the terminal device may actively send the capability information to the first network device. A network device sends capability information.

In an example, the capability information may be used to indicate the number of user identities supported by the terminal device. For example, the capability information includes 2 bits. When the value of the 2 bits is not 0, the indicated value represents the number of user identities supported by the terminal device. For example, 01 represents that the terminal device supports 1 user identity, and 10 represents The terminal device supports 2 user identities, and 11 represents that the terminal device supports 3 user identities. For another example, the capability information includes 1 bit, and the number of user identities supported by the terminal device represented by the value of this bit can be preset. For example, 0 means that the terminal device supports 1 user identity, and 1 means that the terminal device supports two identities. The user identity is not specifically limited.

Further, after the first network device obtains the capability information of the terminal device, if it is determined that the terminal device supports at least two user identities, it may assign corresponding identities to the at least two user identities, and send the identities corresponding to the at least two user identities To the terminal equipment. Correspondingly, the terminal device can store the identifiers corresponding to at least two user identities after receiving them. Among them, the identifier corresponding to the user identity can also be understood as a SIM card identifier, which can be expressed as a SIMID. For example, the terminal device supports a first user identity and a second user identity, the identity corresponding to the first user identity is 0 (ie SIMID=0), and the identity corresponding to the second user identity is 1 (ie SIMID=1).

In an example, the terminal device supports the first user identity and the second user identity. Since the terminal device establishes a connection with the first network device as the first user identity, the identity corresponding to the first user identity can be a default value, such as The default is SIMID=0. In this case, after the first network device obtains the capability information of the terminal device, it can assign a corresponding identifier to the second user identity, instead of assigning a corresponding identifier to the first user identity, and assign the corresponding identity to the second user identity. The identification is sent to the terminal device.

Step 202: The first network device sends control information to the terminal device, where the control information is used to instruct the terminal device to randomly access the cell of the second network device as the second user.

In an example, the control information may include an identifier corresponding to the second user identity.

Correspondingly, in step 203, the terminal device receives the control information sent by the first network device as the first user.

Step 204: The terminal device randomly accesses the cell of the second network device as the second user.

The control information is described below.

In this embodiment of the application, the control information may be downlink control information (DCI). One or more of the following fields in the control information are used to carry the identity corresponding to the second user identity: the newly expanded first bit field, Reserved domain. In the following, the newly expanded first bit field is used to carry the identity corresponding to the second user identity as an example for description.

When the control information is DCI, the control information can be scrambled with C-RNTI or non-C-RNTI, such as random access radio network temporary identifier (RA-RNTI) Scrambling, or scrambling using newly defined RNTI. When the control information is scrambled with the newly defined RNTI, the terminal device can recognize that the control information is the PDCCH order according to the newly defined RNTI, that is, the newly defined RNTI can be used to indicate that the control information is the PDCCH order. The newly defined RNTI may be referred to as the radio network temporary identification (PDCCH order RNTI, PO-RNTI) of the downlink control channel command.

Exemplarily, the control information is scrambled using C-RNTI or non-C-RNTI. It can be understood that the CRC in the control information is scrambled using C-RNTI or non-C-RNTI. The following will briefly describe the DCI coding process to illustrate that DCI uses C-RNTI scrambling (here, DCI uses C-RNTI scrambling as an example. When DCI uses non-C-RNTI scrambling, you can refer to the use of C-RNTI scrambling. Understand the meaning of), the DCI encoding process includes: Step 1. Information bits form an information block according to a certain format (DCI format), or called an information sequence, such as a ₀ , a ₁ , a ₂ , a ₃ ,... ...,a _A-1 ; Step 2, generate CRC check information p ₀ , p ₁ , p according to the information blocks a ₀ , a ₁ , a ₂ , a ₃ ,..., a _A-1 ₂ ,p ₃ ,......,p _L-1 , add CRC check information to the information block to generate b ₀ ,b ₁ ,b ₂ ,b ₃ ,......,b _{k- 1} , where: b _{k =} a _k , k = 0,1,2,...,A-1; b _{k =} p _kA , k =A,A+1,A+2,...,A+L- 1,, k=A+L. Step 3. After appending, the CRC check information can be _{scrambled with C-RNTI (such as x rnti,0} ,x _rnti,1 ,...,x _rnti,15 ) to generate an information sequence c ₀ ,c ₁ ,c ₂ , c ₃ ,......,c _k-1 , for example, can refer to the following operations: c _k =b _k , k=0,1,2,...,A+7; c _k =(b _k +x _rnti,kA-8 )mod2,k=A+8,A+9,A+10,...,A+23. Step 4. Perform channel coding and rate matching, complete the coding process, and obtain the coded DCI.

The control information can be DCI in multiple possible formats, such as DCI format 0_0, DCI format 0_1, DCI format 1_0, or DCI format 1_1. DCI can include hybrid automatic repeat request (HARQ) process number (HARQ process number) indicator field, redundancy version (redundancy version, RV) indicator field, modulation and coding scheme (modulation and coding scheme). MCS) indication domain, frequency domain resource assignment (frequency domain resource assignment) indication domain, time domain resource assignment (time domain resource assignment) indication domain, new data (new data indicator, NDI) indication domain, transmit power (transmit power control) , TPC) indicator field (it can be one or more of physical downlink shared channel (PDSCH) TPC or PUCCH TPC), frequency hopping flag indicator field, and reserved field.

Further, the control information may include indication information, and the indication information is used to indicate that the control information is signaling used to trigger random access, such as PDCCH order. Because the HARQ process number indicator field, RV indicator field, MCS indicator field, frequency domain resource allocation indicator field, time domain resource allocation indicator field, new data indicator field, transmit power control indicator field, etc. are all scheduling uplink data or downlink data. During transmission, it is used to indicate corresponding information; for example, when DCI format 1_0 is used to schedule downlink data, the frequency domain resource allocation indication field is used to indicate frequency domain resources occupied by the downlink data. When the DCI is the PDCCH order, it is no longer used for scheduling uplink data or downlink data. Therefore, the above-mentioned fields can be used to carry indication information. In an example, one or more of the following fields can be used to carry indication information: HARQ number indication field, RV indication field, MCS indication field, frequency domain resource allocation indication field, time domain resource allocation indication field, new transmission data indication field , Transmission power control indication field, newly extended second bit field, reserved field. For example, if the indication information is carried by the frequency domain resource allocation indication field, the value of the frequency domain resource allocation indication field may be all ones.

Understandably, other possible domains may also be used to carry the indication information, which is not limited in the embodiment of the present application. It should be noted that when control information is scrambled using non-C-RNTI, such as PO-RNTI scrambling, since PO-RNTI can indicate that the control information is PDCCH order, in this case, the control information may not include an indication. information.

Taking the DCI format 1_0 with C-RNTI scrambled as the control information as an example, as shown in Table 1, it is an example of the domains included in the control information.

Table 1: Examples of domains included in control information

Based on Table 1, when the terminal device detects that the information of the frequency domain resource allocation indication field in the DCI format 1_0 format scrambled with the C-RNTI is all 1, it is determined to be the PDCCH order. If the terminal device detects that the user identity indicated by the SIMID in the DCI format 1_0 format scrambled with the C-RNTI is the second user identity, it can initiate a random access process with the second user identity.

Taking the DCI format 1_1 where the control information is scrambled by the C-RNTI as an example, as shown in Table 2, it is an example of the domains included in the control information.

Table 2: Examples of domains included in control information

Based on Table 2, when the terminal device detects that the information of the frequency domain resource allocation indication field in the DCI format 1_1 format scrambled with the C-RNTI is all 1, it determines that it is the PDCCH order. If the terminal device detects that the user identity indicated by the SIMID in the DCI format 1_0 format scrambled with the C-RNTI is the second user identity, it can initiate a random access process with the second user identity.

Exemplarily, as can be seen from Table 1 and Table 2, the control information may include the first information or the control information may carry the first information, and the first information may include one or more of the following: random access sequence Index information, random access carrier information, SSB index information, RACH timing information associated with the SSB index, carrier identification, the first information may also include other possible information, which is not specifically limited.

In the embodiment of this application, in order not to increase the number of blind PDCCH checks of the UE, the size of the control information can be aligned with the size of the original DCI format. For example, when the control information is DCI format 1_0, its size can be the same as the DCI used for downlink data scheduling. The format 1_0 has the same size.

In the embodiment of the present application, there may be multiple triggering modes for the first network device to send control information to the terminal device, such as mode 1, which may be triggered by the first request sent by the terminal device to the first network device; another example is mode 2. It can be triggered by the second request sent by the second network device to the first network device (the second network device and the first network device are different network devices at this time) or the second network device determines that the second network device needs to use the second request It is triggered directly after the user identity initiates the random access process (the second network device and the first network device are the same network device at this time). The mode 1 and mode 2 are described below.

Way 1

The terminal device resides in the cell of the second network device as the second user. When the terminal device determines that it needs to initiate the random access process as the second user, it can send the first request to the first network device as the first user. The first request is used to request random access to the cell of the second network device as the second user; accordingly, after receiving the first request, the first network device can send the control information in step 202 to the terminal device.

In this manner, the first request may include the identifier of the second network device and the identifier corresponding to the second user identity. After receiving the first request, the first network device can learn that the terminal device needs to initiate the random access process with the second user identity according to the identifier corresponding to the second user identity carried in the first request; and, according to the first request The carried identifier of the second network device may know that the network device to which the cell to which the terminal device needs random access as the second user identity belongs is the second network device. The first network device can determine whether the identity of the second network device is the same as the identity of the first network device. If they are not the same, it means that the second network device and the first network device are different network devices; in this case, the first network device The network device may obtain the aforementioned first information from the second network device, and then send the control information carrying the first information to the terminal device. If they are the same, it means that the second network device and the first network device are the same network device. At this time, the first network device can obtain the first information from itself, and then send control information carrying the first information to the terminal device.

It should be noted that: (1) The first request may also include other possible information, such as the identity of the cell that the terminal device needs to randomly access as the second user, the identity of the terminal device, etc., which are not specifically limited. Among them, the identification of the terminal equipment can be a cell radio network temporary identifier (C-RNTI), an inactive radio network temporary identifier (inactive RNTI, I-RNTI), or a 5G system temporary user identifier (5G S). -Temporary mobile subscription identifier, 5G-S-TMSI). (2) The identification of the network device may be a base station identifier (gNB ID) (used to identify a base station in the PLMN), or a global gNB ID (used to globally identify a base station). Among them, the global gNB ID may be composed of the identity of the PLMN to which the gNB belongs and the gNB ID. (4) The cell of the second network device in which the terminal device resides as the second user can be understood as the cell in which the terminal device resides. The cell in which the terminal device resides refers to whether the terminal device is in an idle state (RRC_idle) or an inactive state (RRC_inactive). The cell that receives system messages.

Way 2

After the second network device learns that the network device to which the serving cell of the terminal device belongs is the first network device, if it is determined that the second network device and the first network device are different network devices, in this case, the second network device determines that the terminal is required After the device initiates the random access process as the second user, it may send a second request to the first network device. For example, the second request may include the above-mentioned first information; accordingly, the first network device receives the first network device. After the second request, the control information carrying the first information can be sent to the terminal device. If it is determined that the second network device and the first network device are the same network device, in this case, after the second network device determines that the terminal device is required to initiate the random access process as the second user, it can directly obtain the first information from itself , And then send the control information carrying the first information to the terminal device.

Exemplarily, the second network device may learn that the network device to which the serving cell of the terminal device belongs is the first network device in various ways. For example, the terminal device first registers as the first user and establishes a connection with the first network device, and obtains the identity of the first network device. When the terminal device is registered to the second network as the second user, it can register the first network The identification of the device is sent to the second network device and/or the core network element. When the terminal device resides in the cell of the second network device as the second user, it can read the saved first network device identifier; or the core network element can send the network device to the second network device the network to which the serving cell of the terminal device belongs The identification of the device.

Combining the above method 1 and method 2, from the perspective of the first network device, the first network device knows the cell where the terminal device resides (the cell on which the terminal device resides refers to the network where the terminal device receives system messages in RRC_idle or RRC_inactive). After the device is the second network device, if it is determined that the second network device and the first network device are different network devices, the control can be sent to the terminal device based on the first request sent by the terminal device or the second request sent by the second network device Information; if it is determined that the second network device and the first network device are the same network device, the control information can be sent to the terminal device based on the first request sent by the terminal device, or the first network device can also determine that the terminal device needs to be 2. After the user identity initiates the random access process, it sends control information to the terminal device.

Exemplarily, the first network device may learn that the network device to which the cell of the terminal device resides is the second network device in various ways. For example, after the terminal device resides in the cell of the second network device as the second user, it may Send to the first network device the identity of the network device to which the cell of the terminal device belongs (that is, the identity of the second network device); for another example, the core network element may send to the first network device the identity of the cell in which the terminal device resides The ID of the network device.

Based on the foregoing description, the following describes a possible overall flow of the communication method provided in Embodiment 1 of the present application in conjunction with FIG. 3. Assuming that the terminal device supports SIM card 1 (corresponding to the first user identity) and SIM card 2 (corresponding to the second user identity), and only one radio frequency Rx path is configured in the terminal device, as shown in Figure 1d and Figure 1e above. Situation. Figure 3 is a schematic diagram of the overall process corresponding to the communication method provided by this application, as shown in Figure 3, including:

Step 301: The terminal device establishes a connection with the first network device in the network to which the first user identity belongs.

Exemplarily, the terminal device randomly accesses the cell of the first network device (such as cell 1) as the first user, and is in the RRC_Connected state.

Step 302: The terminal device sends capability information to the first network device as the first user identity, where the capability information is used to indicate that the terminal device supports two user identities, that is, the first user identity and the second user identity.

Step 303: The first network device receives the capability information sent by the terminal device, assigns corresponding identities to the first user identity and the second user identity, and sends the respective identities corresponding to the first user identity and the second user identity to the terminal device .

Step 304: The terminal device receives the identities corresponding to the first user identity and the second user identity, respectively.

Step 305: The terminal device determines that it needs to randomly access the cell in the second network device as the second user identity, and sends a first request as the first user identity to the first network device, and the first request includes the identity corresponding to the second user identity. And the identification of the second network device.

Step 306: The first network device receives the first request, and determines whether the first network device and the second network device are the same network device according to the first request. If so, perform step 307A and step 308A, if not, perform step 307B To 310B.

Step 307A: The first network device obtains the first information, and sends the control information carrying the first information to the terminal device.

In step 308A, the terminal device receives the control information, and randomly accesses the cell of the first network device (such as cell 2) as the second user.

Exemplarily, cell 1 and cell 2 may be different cells of the first network device.

Step 307B: The first network device sends a third request to the second network device, and the third request is used to request to obtain the first information.

Step 308B, the second network device receives the third request, and sends the first information to the first network device.

Step 309B: The first network device receives the first information, and sends the control information carrying the first information to the terminal device.

Step 310B: The terminal device receives the control information, and randomly accesses the second network device as the second user.

Using the above method, the terminal device can trigger the random access process to be initiated as the second user according to the control information received from the first network device as the first user, thereby providing a terminal device that supports at least two user identities. A new random access method. Moreover, when the terminal device is configured with only one radio frequency Rx path, the above method is used to trigger the initiation of the random access process with the second user identity, which can effectively shorten the interruption time of the service related to the first user identity.

Example two

According to the content of the first embodiment above, when the communication method provided by the embodiment of the present application is adopted, if the first network device and the second network device are different network devices in the same network, it is possible to avoid the difference between the network devices in different networks. Further, if the first network device and the second network device are the same network device in the same network, communication between different network devices can be avoided, effectively saving signaling overhead. Based on this, the embodiment of the present application also provides a method for PLMN selection and cell selection. Because PLMN is selected to determine the network serving the terminal equipment, cell selection is used to determine the cell where the terminal equipment resides, and cell selection can also be used to determine the network equipment that provides services for the terminal equipment. This method is used to make the terminal equipment as good as possible. The first user identity and the second user identity select the same PLMN, and select the cell of the same network device.

Exemplarily, the terminal device may perform PLMN selection and cell selection, and then camp on the selected cell after completing the cell selection.

For a terminal device that supports a SIM card (or a user identity), the PLMN selection of the terminal device may include two steps: Step 1: PLMN search. The access stratum (AS) of the terminal equipment scans the frequency, searches for the cell with the strongest signal at each frequency point or specific frequency point (such as the previously saved frequency point) in the frequency band supported by the terminal equipment, and reads its broadcast information , Obtain the PLMN ID and report it to the non-access stratum (Non-access stratum, NAS). Step 2: PLMN selection. The NAS of the terminal device selects the PLMN according to the priority order, or selects the PLMN according to the user's manual selection. Further, after the terminal device selects the PLMN (for example, the selected PLMN is the first PLMN), it can determine whether there is a cell that can be camped on among the multiple cells of the searched first PLMN, and if so, it can select and camp on The cell. Among them, the implementation manner of judging whether a cell is a campable cell can be referred to the existing solution, which will not be repeated here.

For a terminal device that supports at least two SIM cards (or at least two user identities), in a possible implementation manner, the terminal device can perform PLMN selection and selection with the first user identity and the second user identity respectively. Cell selection. However, in this way, since the terminal device performs PLMN selection and cell selection as the first user, and performs PLMN selection and cell selection as the second user, they are mutually independent, which is likely to lead to the selection of the first user. The PLMN and the PLMN selected in the identity of the second user are different PLMNs, and/or the cell selected in the identity of the first user and the cell selected in the identity of the second user are cells of different network devices.

Based on this, the embodiments of the present application provide a communication method for terminal devices that support at least two user identities. In an example, the method may include two possible solutions. For ease of description, it is called Solution 1. two. In the following, taking the terminal device supporting two user identities (the first user identity and the second user identity respectively as an example) as an example, the solution 1 and the solution 2 are respectively described in conjunction with FIG. 4 and FIG. 5.

Option One

FIG. 4 is a schematic diagram of the process corresponding to the communication method provided in Solution 1 of the embodiment of the application, as shown in FIG. 4, including:

Step 401: The terminal device searches for the first PLMN according to the information corresponding to the second user identity, where the first PLMN is the PLMN corresponding to the first user identity.

Here, the terminal device may use the first user identity to perform PLMN selection in the manner described in step 1 and step 2 above, and then determine that the PLMN corresponding to the first user identity is the first PLMN. Exemplarily, the first PLMN is the PLMN corresponding to the first user identity, and it can also be understood that the first PLMN is the PLMN to which the first user identity belongs.

Step 402: If the cell signal strength of the first PLMN is greater than the first threshold, the terminal device determines that the first PLMN is the PLMN corresponding to the second user identity.

Exemplarily, the terminal device can search for one or more PLMNs according to the information corresponding to the second user identity. If the first PLMN is included in the one or more PLMNs, it can determine whether the cell signal strength of the PLMN is greater than the first threshold. , It can be determined that the first PLMN is the PLMN corresponding to the second user identity; if the cell signal strength of the first PLMN is less than or equal to the first threshold, it can be determined whether one or more PLMNs other than the first PLMN are There is a PLMN whose cell signal strength is greater than the first threshold. If there is (for example, the cell signal strength of the second PLMN is greater than the first threshold), it can be determined that the second PLMN is the PLMN corresponding to the second user identity.

In the embodiment of the present application, the first threshold may be set by those skilled in the art according to actual needs and experience, and is not specifically limited. Exemplarily, the first threshold may be SlaveSIMRsrpThreshold.

Step 403: The terminal device selects the cell of the first network device in the first PLMN.

Exemplarily, after the terminal device determines that the PLMN corresponding to the first user identity is the first PLMN, it can determine whether there is a cell that can be camped on in one or more cells in the searched first PLMN. It is a cell that can be camped on, and the network device to which cell 1 belongs is the first network device), you can select and camp on cell 1.

Step 404: If the multiple cells of the first PLMN searched according to the information corresponding to the second user identity include the cell of the first network device (such as cell 2), and cell 2 is a cell that can be camped on, use the second user The identity resides in cell 2.

Using the above method, when the terminal device performs PLMN selection and cell selection as the first user, it can proceed independently. When the terminal device performs PLMN selection and cell selection as the second user, it can refer to the PLMN and cell selected by the terminal device as the first user. The selected cell, so as to make the terminal device select the same PLMN as the first user identity and the second user identity, and select the cell of the same network device.

For example, suppose that SIM card 1 and SIM card 2 are installed in the terminal device, SIM card 1 supports the first frequency band, and SIM card 2 supports the second frequency band. For example, the first frequency band may be the n77 frequency band, and the second frequency band may be the n3 frequency band. It should be noted that: (1) In specific implementation, one SIM card can support multiple frequency bands. For ease of description, only one SIM card supports one frequency band as an example for description. (2) SIM card 1 can be the primary card, and SIM card 2 can be the secondary card; the primary and secondary card can be determined according to the SIM card slot, or the SIM card corresponding to the RRC connection can be initiated first, and the other One SIM card is a secondary card.

The terminal device may first search for the PLMN on the frequency of the SIM card 1 according to the information corresponding to the SIM card 1, and then search for the PLMN on the frequency of the SIM card 2 according to the information corresponding to the SIM card 2. As shown in Table 3, the terminal device can first search on the frequencies F4 and F5 of the first frequency band to obtain PLMN1 (F5) and PLMN2 (F4); then search on the frequencies F1, F2 and F3 of the second frequency band to obtain PLMN1 (F1, F3) and PLMN2 (F2). Among them, the underlined cell is the cell with the highest signal strength among the multiple cells of the PLMN searched on a certain frequency.

The terminal device may first determine the PLMN corresponding to the SIM card 1 based on the signal strength of each cell in the searched PLMN1 (F5) and PLMN2 (F4). For example, if p6>p10, the terminal device can determine that the PLMN corresponding to SIM card 1 is PLMN2. Further, if the terminal device determines that p4>SlaveSIMRsrpThreshold, it can directly determine that the PLMN corresponding to the SIM card 2 is PLMN2.

Table 3: PLMN selection example

Further, the terminal equipment can use a method similar to the above-mentioned PLMN selection to perform cell selection. For example, if the terminal device selects the cell of the first network device (such as cell 6) in the PLMN corresponding to SIM card 1 (ie PLMN2), for SIM card 2, if the multiple cells of PLMN2 searched include the first network The cell of the device (such as cell4), and cell4 is a cell that can be camped on, it can directly camp on cell4 as the user identity corresponding to SIM card 2.

Option II

FIG. 5 is a schematic diagram of the process corresponding to the communication method provided in the second embodiment of the application, as shown in FIG. 5, including:

Step 501: The terminal device searches for the first PLMN according to the information corresponding to the first user identity.

Step 502: The terminal device searches for the first PLMN according to the information corresponding to the second user identity.

Step 503: If the cell signal strength of the first PLMN is greater than the first threshold, the terminal device determines that the PLMNs corresponding to the first user identity and the second user identity are both the first PLMN.

Exemplarily, the terminal device searches for the first PLMN set according to the information corresponding to the first user identity, and the first PLMN set includes one or more PLMNs; the terminal device searches for the second PLMN set according to the information corresponding to the second user identity, The second PLMN set includes one or more PLMNs.

In an example, if the terminal device determines that both the first PLMN set and the second PLMN set include the first PLMN, it can determine whether the cell signal strength of the first PLMN is greater than the first threshold, and if so, the first user identity can be determined The PLMN corresponding to the second user identity is the first PLMN.

In another example, if the terminal device determines that both the first PLMN set and the second PLMN set include the first PLMN and the second PLMN, it can respectively determine whether the cell signal strength of the first PLMN and the second PLMN is greater than the first threshold If the cell signal strength of the first PLMN and the second PLMN are both greater than the first threshold, one of the first PLMN and the second PLMN (such as the first PLMN) can be selected as the first user identity and the second user identity The specific selection method of the corresponding PLMN is not limited. It should be noted that: this example is only taking the first PLMN set and the second PLMN set including the first PLMN and the second PLMN as an example. In other possible embodiments, the third PLMN and the fourth PLMN may also be included. , Can refer to the method described in this example to perform.

In another example, if the first PLMN set and the second PLMN set have no intersection, the PLMN corresponding to the first user identity and the PLMN corresponding to the second user identity can be determined independently.

Step 504: If the terminal device determines that the one or more cells of the first PLMN searched according to the information corresponding to the first user identity include the first cell of the first network device, and search according to the information corresponding to the second user identity The one or more cells of the first PLMN that you arrive include the second cell of the first network device, and the first cell and the second cell are both campable cells, then camp on the first cell as the first user , And stay in the second cell as the second user.

Using the above method, when the terminal device selects the PLMN with the identity of the first user and the identity of the second user, it can comprehensively consider the search results of the PLMN search with the identity of the first user and the search results of the PLMN search with the identity of the second user. This allows the terminal device to select the same PLMN with the identity of the first user and the identity of the second user, so that when the method described in the first embodiment is used to trigger random access, it can effectively avoid the communication between network devices in different operator networks. Communication. When the terminal device selects the cell with the identity of the first user and the identity of the second user, it is similar, that is, the cell searched with the identity of the first user and the cell searched with the identity of the second user are comprehensively considered, and then try to make the terminal device as the first user. The first user identity and the second user identity select the cell of the same network device, so that when the method described in the first embodiment is used to trigger random access, communication between different network devices can be effectively avoided, and signaling overhead can be saved. In addition, simultaneously performing PLMN selection and/or cell selection by integrating multiple user identities can also shorten the time for PLMN selection and/or cell selection, and improve the user's service experience.

It should be noted that: (1) The difference between the above scheme 1 and scheme 2 is that in scheme 1, the PLMN corresponding to the first user identity and the camping cell (or serving cell) corresponding to the first user identity are determined first, and then When selecting the PLMN corresponding to the second user identity, you can refer to the PLMN corresponding to the first user identity, and when selecting the camping cell corresponding to the second user identity, you can refer to the camping cell (or serving cell) corresponding to the first user identity. ); The second solution is to comprehensively consider the search results, and then determine the PLMN corresponding to the first user identity and the second user identity, and the camping cell corresponding to the first user identity and the camping cell corresponding to the second user identity. In addition to this difference, the two can be cross-referenced. (2) The PLMN selection method in the first solution and the cell selection method in the second solution can be implemented in combination, or the PLMN selection method in the second solution and the cell selection method in the first solution can be implemented in combination.

Regarding the above-mentioned Embodiment 1 and Embodiment 2, it should be noted that: (1) Embodiment 1 and Embodiment 2 can be implemented separately, or Embodiment 1 and Embodiment 2 can also be implemented in combination. (2) The step numbers in Figure 2, Figure 3, Figure 4, or Figure 5 are only numbers for the convenience of description, and do not constitute a restriction on the order of execution of each step; there is no timing dependency among the above steps There is no strict execution sequence between the steps, which can be adjusted according to the actual situation. The steps in Figure 2, Figure 3, Figure 4, or Figure 5 are not necessary steps in the execution process, and can be deleted according to actual needs in specific implementation.

In the embodiment of the present application, after the terminal device is registered in the first network with the user identity corresponding to the SIM card 1, it may be subsequently provided by a cell in the first network (for example, a cell belonging to the first network device) for the terminal device Service, or multiple cells in the first network can provide services for the terminal device; wherein, the multiple cells can be cells belonging to the same network device (such as the first network device) in the first network. The situation can be understood as carrier aggregation (CA), or multiple cells can also be cells belonging to different network devices in the first network. This situation can be understood as dual connectivity (DC). Similarly, after the terminal device is registered in the second network with the user identity corresponding to the SIM card 2, a cell in the second network may subsequently serve the terminal device, or it may be served by multiple cells in the second network. Provide services for terminal equipment.

The foregoing mainly introduces the solutions provided by the embodiments of the present application from the perspective of the interaction between the network device and the terminal device. It can be understood that, in order to implement the above-mentioned functions, the network device or the terminal device may include a corresponding hardware structure and/or software module for performing each function. Those skilled in the art should easily realize that in combination with the units and algorithm steps of the examples described in the embodiments disclosed herein, the embodiments of the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software-driven hardware depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

In the case of an integrated unit (module), FIG. 6 shows a possible exemplary block diagram of a device involved in an embodiment of the present application, and the device 600 may exist in the form of software. The apparatus 600 may include: a processing unit 602 and a communication unit 603. The processing unit 602 is used to control and manage the actions of the device 600. The communication unit 603 is used to support communication between the device 600 and other network entities. Optionally, the communication unit 603 is also called a transceiving unit, and may include a receiving unit and/or a sending unit, which are used to perform receiving and sending operations, respectively. The device 600 may further include a storage unit 601 for storing program codes and/or data of the device 600.

The processing unit 602 may be a processor or a controller, which may implement or execute various exemplary logical blocks, modules, and circuits described in conjunction with the disclosure of the embodiments of the present application. The communication unit 603 may be a communication interface, a transceiver, or a transceiver circuit, etc., where the communication interface is a general term. In a specific implementation, the communication interface may include multiple interfaces. The storage unit 601 may be a memory.

The apparatus 600 may be the terminal device in any of the foregoing embodiments, or may also be a chip provided in the terminal device. The processing unit 602 may support the apparatus 600 to execute the actions of the terminal device in the foregoing method examples. Alternatively, the processing unit 602 mainly executes the internal actions of the terminal device in the method example, and the communication unit 603 may support communication between the apparatus 600 and the network device. For example, the communication unit 603 is configured to execute step 201 and step 203 in FIG. 2 and step 301, step 302, step 304, step 305, step 308A, and step 310B in FIG. 3. The processing unit 602 is configured to execute steps 401 to 404 in FIG. 4 and steps 501 to 504 in FIG. 5.

Specifically, in one embodiment, the communication unit 603 is configured to receive control information sent by the first network device as the first user, and the control information is used to instruct random access as the second user. The cell of the second network device; wherein the first network device is the network device that the terminal device is connected to as the first user; and according to the control information, randomly accesses the second user as the second user 2. Community of network equipment.

In a possible design, the communication unit 603 is further configured to: send a first request to the first network device under the identity of the first user, and the first request is used to request random access under the identity of the second user. Access to the cell of the second network device.

In a possible design, the communication unit 603 is further configured to: send capability information to the first network device as the first user identity, where the capability information is used to indicate that the terminal device supports at least two user identities .

In a possible design, the communication unit 603 is further configured to: use the first user identity to receive the identifier corresponding to the second user identity sent by the first network device.

In a possible design, the PLMN corresponding to the first user identity is the first PLMN; the processing unit 602 is configured to: search for the first PLMN according to the information corresponding to the second user identity; If the cell signal strength of a PLMN is greater than the first threshold, it is determined that the first PLMN is the PLMN corresponding to the second user identity. Wherein, the first network device and the second network device belong to the first PLMN.

In a possible design, the processing unit 602 is configured to: search for the first PLMN according to the information corresponding to the first user identity; search for the first PLMN according to the information corresponding to the second user identity; If the cell signal strength of a PLMN is greater than or equal to the first threshold, it is determined that the PLMNs corresponding to the first user identity and the second user identity are both the first PLMN; wherein, the first network device and the The second network device belongs to the first PLMN.

In a possible design, the first network device and the second network device are the same network device; the processing unit 602 is configured to: if the first network device is searched according to the information corresponding to the second user identity The multiple cells of the PLMN include the cell of the first network device, and the cell of the first network device is a cell that can be camped on, then the cell of the first network device is camped on as the second user. .

The apparatus 600 may also be the network device (such as the first network device) in any of the above embodiments, or may also be a chip set in the network device (such as the first network device). The processing unit 602 may support the apparatus 600 to perform the actions of the first network device in the foregoing method examples. Alternatively, the processing unit 602 mainly executes the internal actions of the first network device in the method example, and the communication unit 603 may support communication between the apparatus 600 and the terminal device. For example, the communication unit 603 is used to execute step 201 and step 202 in FIG. 2 and step 301, step 303, step 307A, step 307B, and step 309B in FIG. 3.

Specifically, in one embodiment, the communication unit 603 is configured to: establish a connection with the terminal device in the communication network where the first user identity of the terminal device is located; send control information to the terminal device, and The control information is used to instruct the terminal device to randomly access the cell of the second network device as the second user.

In a possible design, the communication unit 603 is further configured to: receive a first request sent by the terminal device as the first user, and the first request is used to request the terminal device to use the second The user identity randomly accesses the cell of the second network device.

In a possible design, the control information includes first information, and the first information includes one or more of the following: random access sequence information, random access carrier information, SSB index information, and association with SSB index The RACH timing information and the carrier identifier of the RACH; the first request includes the identifier of the second network device; the processing unit 602 is configured to: according to the identifier of the second network device, if it is determined that the second network device and the If the first network device is a different network device, the first information is obtained from the second network device.

In a possible design, the communication unit 603 is further configured to: receive a second request sent by the second network device, and the second request is used to request the terminal device to randomly access as the second user. The cell of the second network device.

In a possible design, the communication unit 603 is further configured to receive capability information sent by the terminal device as the first user identity, where the capability information is used to indicate that the terminal device supports at least two user identities.

In a possible design, the communication unit 603 is further configured to send an identifier corresponding to the second user identity to the terminal device.

It should be noted that the division of units (modules) in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation. The functional modules in the embodiments of the present application may be integrated into one processing module, or each module may exist alone physically, or two or more modules may be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware or software function modules.

If the integrated module is implemented in the form of a software function module and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the embodiments of the present application are essentially or the part that contributes to the prior art, or all or part of the technical solutions can be embodied in the form of software products, and the computer software products are stored in a storage The medium includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium may be various mediums capable of storing program codes, such as a memory.

FIG. 7 shows a schematic structural diagram of a device. The device 700 includes a processor 710, a memory 720, and a transceiver 730. In an example, the device 700 can implement the functions of the device 600 illustrated in FIG. 6. Specifically, the functions of the communication unit 603 illustrated in FIG. 6 may be implemented by a transceiver, and the functions of the processing unit 602 may be implemented by a processor. Implementation, the function of the storage unit 601 can be implemented by a memory. For example, the apparatus 700 may be the terminal device in the foregoing method embodiment, and the apparatus 700 may be used to implement the method corresponding to the terminal device described in the foregoing method embodiment. For details, please refer to the description in the foregoing method embodiment.

FIG. 8 is a schematic structural diagram of a terminal device 800 provided by an embodiment of this application. For ease of description, FIG. 8 only shows the main components of the terminal device. As shown in FIG. 8, the terminal device 800 includes a processor 801, a memory 802, a control circuit 803, an antenna 804, and an input and output device 805. The terminal device 800 can be applied to the system architecture shown in FIG. 1a, FIG. 1b, or FIG. 1c to perform the functions of the terminal device in the foregoing method embodiment.

The processor 801 is mainly used to process communication protocols and communication data, and to control the entire terminal device, execute software programs, and process data of the software programs, for example, to control the terminal device to perform the actions described in the foregoing method embodiments. The memory 802 is mainly used to store software programs and data. The control circuit 803 is mainly used for conversion of baseband signals and radio frequency signals and processing of radio frequency signals. The control circuit 803 and the antenna 804 together can also be called a transceiver, which is mainly used to transmit and receive radio frequency signals in the form of electromagnetic waves. The input and output device 805, such as a touch screen, a display screen, a keyboard, etc., is mainly used to receive data input by the user and output data to the user.

After the terminal device is turned on, the processor 801 can read the software program in the memory 802, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor 801 performs baseband processing on the data to be sent, and then outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal and then sends the radio frequency signal through the antenna 804 in the form of electromagnetic waves. When data is sent to the terminal equipment, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 801. The processor 801 converts the baseband signal into data and performs processing on the data. deal with.

Those skilled in the art can understand that, for ease of description, FIG. 8 only shows a memory 802 and a processor 801. In an actual terminal device, there may be multiple processors 801 and memories 802. The memory 802 may also be referred to as a storage medium or a storage device, etc., which is not limited in the embodiment of the present application.

As an optional implementation, the processor 801 may include a baseband processor and a central processing unit. The baseband processor is mainly used to process communication protocols and communication data, and the central processing unit is mainly used to control the entire terminal device. Execute the software program and process the data of the software program. The processor 801 in FIG. 8 integrates the functions of the baseband processor and the central processing unit. Those skilled in the art can understand that the baseband processor and the central processing unit may also be independent processors and are interconnected by technologies such as a bus. Those skilled in the art can understand that the terminal device may include multiple baseband processors to adapt to different network standards, the terminal device may include multiple central processors to enhance its processing capabilities, and the various components of the terminal device may be connected through various buses. The baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip. The central processing unit can also be expressed as a central processing circuit or a central processing chip. The function of processing the communication protocol and communication data may be built in the processor 801, or may be stored in the memory 802 in the form of a software program, and the processor 801 executes the software program to realize the baseband processing function.

The terminal device 800 shown in FIG. 8 can implement various processes related to the terminal device in the method embodiments illustrated in FIGS. 2 to 5. The operations and/or functions of each module in the terminal device 800 are respectively for implementing the corresponding processes in the foregoing method embodiments. For details, please refer to the descriptions in the above method embodiments. To avoid repetition, detailed descriptions are appropriately omitted here.

FIG. 9 is a schematic structural diagram of a network device 900 provided by an embodiment of this application. As shown in FIG. 9, the network device 900 includes one or more radio frequency units, such as a remote radio unit (RRU) 910 and one or more baseband units (BBU) (also called digital units). ,Digital unit,DU)920. The RRU 910 may be called a communication unit, which corresponds to the communication unit 603 in FIG. 6. Optionally, the communication unit may also be called a transceiver, a transceiver circuit, or a transceiver, etc., which may include at least one antenna 911和RF unit 912. The RRU 910 part is mainly used for sending and receiving of radio frequency signals and conversion of radio frequency signals and baseband signals, for example, for sending control information to terminal devices. The BBU 920 part is mainly used for baseband processing, control of the base station, and so on. The RRU 910 and the BBU 920 may be physically set together, or may be physically separated, that is, a distributed base station.

The BBU 920 is the control center of the base station, and may also be called a processing module, which may correspond to the processing unit 602 in FIG. 6, and is mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, and spreading. For example, the BBU (processing module) 920 may be used to control the base station to execute the operation procedure of the network device (such as the first network device) in the foregoing method embodiment, for example, to generate the foregoing control information.

In an example, the BBU 920 may be composed of one or more single boards, and multiple single boards may jointly support a radio access network with a single access standard (such as an LTE network), or support different access standards Wireless access network (such as LTE network, 5G network or other networks). The BBU 920 further includes a memory 921 and a processor 922. The memory 921 is used to store necessary instructions and data. The processor 922 is used to control the base station to perform necessary actions, for example, to control the base station to perform the operation procedure of the network device in the foregoing method embodiment. The memory 921 and the processor 922 may serve one or more boards. In other words, the memory and the processor can be set separately on each board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits can be provided on each board.

The network device 900 shown in FIG. 9 can implement various processes involving the network device (such as the first network device) in the method embodiments shown in FIG. 2 and FIG. 3. The operations and/or functions of each module in the network device 900 are respectively for implementing the corresponding processes in the foregoing method embodiments. For details, please refer to the descriptions in the above method embodiments. To avoid repetition, detailed descriptions are appropriately omitted here.

In the implementation process, each step in the method provided in this embodiment can be completed by an integrated logic circuit of hardware in the processor or instructions in the form of software. The steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware processor, or executed and completed by a combination of hardware and software modules in the processor.

It should be noted that the processor in the embodiment of the present application may be an integrated circuit chip with signal processing capability. In the implementation process, the steps of the foregoing method embodiments can be completed by hardware integrated logic circuits in the processor or instructions in the form of software. The above-mentioned processor may be a general-purpose central processing unit (central processing unit, CPU), general-purpose processor, digital signal processing (digital signal processing, DSP), application specific integrated circuits (ASIC), field programmable gate array Field programmable gate array (FPGA) or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof; it can also be a combination that implements computing functions, such as a combination of one or more microprocessors, DSP and micro-processing The combination of the device and so on. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.

It can be understood that the memory or storage unit in the embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electrically available Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory. The volatile memory may be random access memory (RAM), which is used as an external cache. By way of exemplary but not restrictive description, many forms of RAM are available, such as static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), and synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (synchlink DRAM, SLDRAM) ) And direct memory bus random access memory (direct rambus RAM, DR RAM). It should be noted that the memories of the systems and methods described herein are intended to include, but are not limited to, these and any other suitable types of memories.

In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented by software, it can be implemented in the form of a computer program product in whole or in part. The computer program product includes one or more computer programs or instructions. When the computer program or instruction is loaded and executed on the computer, the process or function described in the embodiment of the present application is executed in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer program or instruction may be stored in a computer-readable storage medium or transmitted through the computer-readable storage medium. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server integrating one or more available media. The usable medium may be a magnetic medium, such as a floppy disk, a hard disk, and a magnetic tape; it may also be an optical medium, such as a DVD; it may also be a semiconductor medium, such as a solid state disk (SSD).

The various illustrative logic units and circuits described in the embodiments of this application can be implemented by general-purpose processors, digital signal processors, application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, Discrete gates or transistor logic, discrete hardware components, or any combination of the above are designed to implement or operate the described functions. The general-purpose processor may be a microprocessor. Alternatively, the general-purpose processor may also be any traditional processor, controller, microcontroller, or state machine. The processor can also be implemented by a combination of computing devices, such as a digital signal processor and a microprocessor, multiple microprocessors, one or more microprocessors combined with a digital signal processor core, or any other similar configuration. achieve.

The steps of the method or algorithm described in the embodiments of the present application can be directly embedded in hardware, a software unit executed by a processor, or a combination of the two. The software unit can be stored in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM or any other storage medium in the art. Exemplarily, the storage medium may be connected to the processor, so that the processor can read information from the storage medium, and can store and write information to the storage medium. Optionally, the storage medium may also be integrated into the processor. The processor and the storage medium can be arranged in an ASIC, and the ASIC can be arranged in a terminal device. Optionally, the processor and the storage medium may also be provided in different components in the terminal device.

These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment. The instructions provide steps for implementing the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

Although the embodiments of the present application are described in combination with specific features, it is obvious that various modifications and combinations can be made without departing from the spirit and scope of the embodiments of the present application. Correspondingly, this specification and drawings are merely exemplary descriptions of the embodiments of the present application defined by the appended claims, and are deemed to cover any and all modifications, changes, combinations or equivalents within the scope of the embodiments of the present application.

Claims

A communication method, characterized in that the method is applicable to a terminal device, the terminal device supports at least two user identities, the at least two user identities include a first user identity and a second user identity, and the method includes :

Receive control information sent by the first network device as the first user, where the control information is used to indicate random access to a cell of the second network device as the second user, wherein the first network The device is a network device connected by the terminal device as the first user;

According to the control information, randomly access the cell of the second network device as the second user.
The method according to claim 1, wherein the control information includes an identifier corresponding to the second user identity.
The method according to claim 1 or 2, wherein the method further comprises:

Send a first request to the first network device with the identity of the first user, where the first request is used to request random access to the cell of the second network device with the identity of the second user.
The method according to any one of claims 1 to 3, wherein the method further comprises:

Sending capability information to the first network device as the first user identity, where the capability information is used to indicate that the terminal device supports at least two user identities.
The method according to any one of claims 1 to 4, wherein the method further comprises:

Receiving the identity corresponding to the second user identity sent by the first network device as the first user identity.
The method according to any one of claims 1 to 5, wherein the public land mobile communication network PLMN corresponding to the first user identity is the first PLMN;

The method also includes:

Searching for the first PLMN according to the information corresponding to the second user identity;

If the cell signal strength of the first PLMN is greater than the first threshold, determining that the first PLMN is the PLMN corresponding to the second user identity;

Wherein, the first network device and the second network device belong to the first PLMN.
The method according to any one of claims 1 to 5, wherein the method further comprises:

Search for the first PLMN according to the information corresponding to the first user identity;

Searching for the first PLMN according to the information corresponding to the second user identity;

If the cell signal strength of the first PLMN is greater than or equal to a first threshold, determining that the PLMNs corresponding to the first user identity and the second user identity are both the first PLMN;

Wherein, the first network device and the second network device belong to the first PLMN.
The method according to claim 6 or 7, wherein the first network device and the second network device are the same network device;

The method also includes:

If the multiple cells of the first PLMN searched according to the information corresponding to the second user identity include the cell of the first network device, and the cell of the first network device is a cell that can be camped on, then Camp on the cell of the first network device as the second user.
A communication method, characterized in that the method is applicable to a first network device, and the method includes:

Establishing a connection with the terminal device in the communication network where the first user identity of the terminal device is located;

Sending control information to the terminal device, where the control information is used to instruct the terminal device to randomly access the cell of the second network device as the second user.
The method according to claim 9, wherein the control information includes an identifier corresponding to the second user identity.
The method according to claim 9 or 10, wherein the method further comprises:

Receiving a first request sent by the terminal device in the identity of the first user, where the first request is used to request the terminal device to randomly access the cell of the second network device in the identity of the second user.
The method according to claim 11, wherein the control information includes first information, and the first information includes one or more of the following: random access sequence information, random access carrier information, synchronization signal Block SSB index information, random access channel RACH timing information associated with the SSB index, and carrier identifier; the first request includes the identifier of the second network device;

The method also includes:

According to the identifier of the second network device, if it is determined that the second network device and the first network device are different network devices, the first information is obtained from the second network device.
The method according to claim 9 or 10, wherein the method further comprises:

Receiving a second request sent by the second network device, where the second request is used to request the terminal device to randomly access the cell of the second network device as the second user.
The method according to any one of claims 9 to 13, wherein the method further comprises:

Receiving capability information sent by the terminal device as the first user identity, where the capability information is used to indicate that the terminal device supports at least two user identities.
The method according to any one of claims 9 to 14, wherein the method further comprises:

Sending the identifier corresponding to the second user identity to the terminal device.
A device, characterized in that the device includes a processor, a memory, and instructions stored on the memory and executable on the processor, and when the instructions are executed, the device executes the The method of any one of 1 to 8 is required.
A device, characterized in that the device includes a processor, a memory, and instructions stored on the memory and executable on the processor, and when the instructions are executed, the device executes the The method of any one of claims 9-15.
A terminal device, characterized by comprising the device according to claim 16.
A network device, characterized by comprising the device according to claim 17.
A computer-readable storage medium, characterized by comprising instructions, which when run on a computer, causes the computer to execute the method according to any one of claims 1 to 15.