WO2021062629A1

WO2021062629A1 - Method and apparatus for multiple universal subscriber identity module (musim) communication

Info

Publication number: WO2021062629A1
Application number: PCT/CN2019/109451
Authority: WO
Inventors: 应江威; 杨艳梅; 许胜锋
Original assignee: 华为技术有限公司
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2021-04-08

Abstract

The present application provides a method for multiple universal subscriber identity module (MUSIM) communication, being applicable to terminal devices comprising a plurality of universal subscriber identity modules (USIMs). A first PLMN corresponding to a first USIM of a terminal device also obtains, in addition to the state of the first USIM, the state(s) of a second USIM(s) of the terminal device by means of a transmission by the terminal device, and when the state of the second USIM changes, synchronously updates the state of the second USIM by means of a transmission by the terminal device. PLMNs corresponding to different USIMs of a terminal device can share the state of their respective USIMs therebetween , and thereby can cooperate and coordinate with each other, improving system performance.

Description

Method and device for multi-universal user identification module MUSIM communication

Technical field

This application relates to the field of wireless communication technology, and more specifically, to a method and device for multi-universal user identification module MUSIM communication.

Background technique

The universal subscriber identity module (USIM) is an application for terminal user identification, and is generally a module in the universal intergrated circuit card (UICC). The USIM stores the identity verification, authentication and encryption related information of the subscribers of the wireless communication system, and the terminal equipment uses the USIM to access the wireless communication system. In addition, the USIM can be regarded as an upgraded subscriber identification module (SIM), which has upgraded the algorithm in terms of security and added the authentication function of the USIM to the network, which has higher security performance.

Some existing terminal devices have multiple card slots and can install multiple USIMs; or, one UICC on the terminal device stores multiple USIMs; or, multiple USIMs can be stored on the terminal device without UICC, that is, Soft SIM or soft USIM. In addition, users of terminal devices also need to hold multiple USIMs at the same time. For example, used to contact different user groups, or used for different communication services. Moreover, in the future enterprise scenarios, there is a strong demand for one terminal device to support multiple USIMs.

Currently, terminal devices on the market have different communication capabilities. For example, single-receiving and single-transmitting (single Rx/single Tx), dual-receiving and single-transmitting (dual Rx/single Tx), and dual-receiving and dual transmission (dual Rx/dual Tx). For a terminal device that supports multiple USIMs, in the existing mechanism, regardless of the communication capabilities of the terminal device, the public land mobile network (PLMN) only perceives the status of its corresponding single USIM, but not The status of other USIMs of the terminal device. Each PLMN only performs signaling and/or data interaction with the terminal equipment according to the state of its corresponding USIM, and the system performance is not ideal in many aspects.

Summary of the invention

This application provides a method and device for MUSIM communication, which can improve system performance.

In the first aspect, the present application provides a method for MUSIM communication, which is applied to a terminal device including at least two USIMs. The method includes: the terminal device obtains the status of a second USIM of the at least two USIMs, and the second USIM includes In the at least two USIMs except for the first USIM, the first USIM corresponds to the first public land mobile network PLMN; the terminal device sends a first message to the network element of the first PLMN, and the first message carries the first message 2. The status of the USIM.

In the technical solution of the present application, the terminal device sends the status of the second USIM to the network element of the first PLMN corresponding to the first USIM, so that the network element of the first PLMN not only learns the status of the first USIM corresponding to it, You can also learn the status of other second USIMs. Furthermore, the first PLMN optimizes the signaling and/or data communication of the first USIM of the terminal device according to the state of the second USIM sent by the terminal device, which can improve the performance of the communication system.

With reference to the first aspect, in some implementation manners of the first aspect, the first message also carries the status of the first USIM.

In addition to carrying the status of the second USIM, the first message also carries the status of the first USIM, so that the terminal device sends the status of all the USIMs contained in the terminal device to the network element of the first PLMN corresponding to the first USIM. The second USIM corresponding to the different first USIM is decided, which simplifies the logic design and signaling cell design of the terminal equipment.

With reference to the first aspect, in some implementations of the first aspect, before the terminal device obtains the status of the second USIM of the at least two USIMs, the method further includes: the terminal device obtains the MUSIM of the first PLMN to the terminal device Authorization of communication.

The terminal device sends the second USIM status to the first PLMN after obtaining the authorization of the first PLMN for the MUSIM communication of the terminal device, so as to avoid the terminal device sending the status of the second USIM if the first PLMN is not authorized for the MUSIM communication of the terminal device The failure of the signaling process and the waste of network resources may be caused by the state of the second USIM. In other words, the terminal device sends the status of the second USIM to the first PLMN after obtaining the authorization of the first PLMN for the MUSIM communication of the terminal device, which can avoid the failure of the signaling process and the waste of network resources.

With reference to the first aspect, in some implementation manners of the first aspect, the network element of the first PLMN includes the core network element of the first PLMN and/or the access network element of the first PLMN.

The terminal device sends the status of the second USIM to the core network device and/or access network device of the first PLMN corresponding to the first USIM, so that both the core network and the access network of the first PLMN can communicate with the first USIM of the terminal device Optimized signaling and/or data communication can improve system performance.

With reference to the first aspect, in some implementation manners of the first aspect, the terminal device obtaining the authorization of the first PLMN to the terminal device's MUSIM communication includes:

The terminal device sends a second message to the core network element of the first PLMN. The second message carries the MUSIM capability information of the terminal device. The MUSIM capability information is used to indicate that the terminal device supports MUSIM; The element receives a third message, which is used to instruct the terminal device to obtain the authorization of the first PLMN for MUSIM communication of the terminal device.

With reference to the first aspect, in some implementations of the first aspect, the second message is a registration request message, and the third message is a registration acceptance message.

The terminal device sends the MUSIM capability information to the core network element of the first PLMN through the registration request message, and the core network element further sends the MUSIM communication indicating whether the first PLMN authorizes the terminal device through the registration acceptance message to the terminal device, so that the terminal device uses The registration process can learn whether the first PLMN authorizes the MSUIM communication of the terminal device, and the existing process can be reused to save signaling overhead.

With reference to the first aspect, in some implementations of the first aspect, when the state of at least one USIM in the second USIM changes, the terminal device sends the change of the at least one USIM to the network element of the first PLMN After the state.

After the terminal device sends the state of the second USIM to the first PLMN, if the state of at least one USIM in the second USIM changes, the terminal device further sends the changed state of the at least one USIM to the first PLMN, In order to enable the first PLMN to synchronously update the state of the second USIM whose state has changed, the signaling and/or data communication of the terminal device can be optimized according to the real-time state of the second USIM, so that the optimization is more accurate.

With reference to the first aspect, in some implementations of the first aspect, the terminal device sending the changed state of the at least one USIM to the network element of the first PLMN includes: the state of the at least one USIM changes, and The first USIM is in an inactive state, and the terminal device does not immediately request to establish a communication connection with the first PLMN to send the changed state of the at least one USIM,

When the terminal device satisfies the first trigger condition, it sends a registration request message to the network element of the first PLMN. The registration request message is used to request the establishment of a communication connection between the terminal device and the first PLMN. For the changed state of at least one USIM, the first trigger condition includes: the timer for periodic registration of the terminal device expires, or the terminal device moves out of the registration area, or the terminal device needs to communicate with the first PLMN network Meta negotiation parameters;

or,

When the terminal device satisfies the second trigger condition, it sends a service request message to the network element of the first PLMN. The service request message is used to request the establishment of a communication connection between the terminal device and the first PLMN. The changed state of the at least one USIM, or the terminal device establishes a communication connection with the first PLMN when the second trigger condition is met, and sends the changed state of the at least one USIM to the network element of the first PLMN For status messages, the second trigger condition includes the presence of uplink data or signaling transmission on the terminal device;

or,

When the terminal device satisfies the third trigger condition, it sends a service request message to the network element of the first PLMN. The service request message is used to request the establishment of a communication connection between the terminal device and the first PLMN. The changed state of the at least one USIM, or the terminal device establishes a communication connection with the first PLMN when the third trigger condition is met, and sends the changed state of the at least one USIM to the network element of the first PLMN The third trigger condition includes that the terminal device receives the paging message of the first PLMN.

When the terminal device is in the CM connection state, if the state of at least one USIM in the second USIM changes, the terminal device immediately triggers to send the changed state of the at least one USIM to the first PLMN. Compared with this solution, in this embodiment, when the state of the at least one USIM changes, if the terminal device is in the CM idle state, the terminal device does not immediately send the changed information of the at least one USIM to the first PLMN. State, but waiting to meet some trigger conditions, request to establish a communication connection with the first PLMN to enter the CM connection state, and then in the process of establishing a communication connection with the first PLMN (for example, registration process or service request process), or in After the communication connection with the first PLMN is established, the changed state of the at least one USIM is sent to the network element of the first PLMN, thereby avoiding the establishment of a signaling connection with the network (that is, a communication connection) for the state change of the USIM. ), which saves signaling overhead and network resources.

With reference to the first aspect, in some implementations of the first aspect, after the terminal device obtains the state of the second USIM of the at least two USIMs, the method further includes: the terminal device saves the state of the second USIM.

The terminal device obtains and saves the state of the second USIM other than the first USIM, and then can determine how to respond to the paging of the first PLMN according to the state of the first USIM and the state of the second USIM, which can avoid the terminal The device responds to the paging of the first USIM by ignoring the state of the second USIM, causing the data and/or signaling communication of the second USIM to be interrupted.

With reference to the first aspect, in some implementations of the first aspect, when the state of at least one USIM in the second USIM changes, the method further includes: the terminal device updates the state of the at least one USIM to The state after the change.

After the state of the second USIM of the terminal device changes, the terminal device saves the changed state of the second USIM to update the state of the second USIM in real time, which can then be based on the state of the first USIM As well as the updated status of the at least one USIM, it is determined how to respond to the paging of the first PLMN, so that the paging response strategy is more accurate and optimized.

With reference to the first aspect, in some implementations of the first aspect, the method further includes: the terminal device receives a paging message, the paging message is used to page the user corresponding to the first USIM and/or the third USIM For users of, the third USIM is one of the second USIMs; the terminal device responds to the paging message according to the paging message, the state of the first USIM, and the state of the third USIM.

With reference to the first aspect, in some implementations of the first aspect, the terminal device responding to the paging message according to the paging message, the state of the first USIM, and the state of the third USIM includes:

When the state of the first USIM is in the active state and the paging message is used to page the user corresponding to the third USIM, the terminal device responds to the paging message according to the user policy; or,

When the state of the third USIM is in the active state and the paging message is used to page the corresponding user of the first USIM, the terminal device responds to the paging message according to the user policy; or,

When the states of the first USIM and the third USIM are both inactive, and the paging message is used to page the user corresponding to the first USIM, the terminal device responds to the paging message; or,

When the states of the first USIM and the third USIM are both inactive, and the paging message is used to page the user corresponding to the third USIM, the terminal device responds to the paging message.

When the terminal device receives the paging message corresponding to the first USIM of the two USIMs of the terminal device by the first PLMN, if at least one of the second USIMs of the terminal device is already in the active state (active), the terminal device further according to The user policy determines whether to respond to the page. And if both the first USIM and the second USIM are in an inactive state (inacitve), the terminal device responds to the paging.

From the perspective of the terminal device, it can be avoided that when the second USIM is in an active state (for example, there is data and/or signaling communication), the terminal device responds to the paging of the first USIM, resulting in the second USIM data and/or signaling communication Interruption. From the perspective of the first PLMN, it can be avoided that the first PLMN does not page to the first USIM without knowing the second USIM, expanding the paging range, increasing the number of paging, and even thinking that the first USIM is unreachable, resulting in Waste of paging resources and misjudgment of the status of the first USIM.

In a second aspect, the present application provides a method for MUSIM communication. The method includes: being applied to a terminal device including at least two USIMs. The method includes: a first network element receives a first message from the terminal device, and the first message carries The status of the second USIM, the second USIM includes the USIM of the at least two USIMs except the first USIM, and the first network element belongs to the first public land mobile network PLMN corresponding to the first USIM; the first network element According to the state of the second USIM, the signaling and/or data communication of the first USIM of the terminal device is optimized.

With reference to the second aspect, in some implementation manners of the second aspect, the first message also carries the status of the first USIM.

With reference to the second aspect, in some implementations of the second aspect, the first network element optimizes the signaling and/or data communication of the first USIM of the terminal device according to the state of the second USIM, including: There is downlink signaling or downlink data of the first USIM, and the state of the first USIM is inactive and the state of any one of the second USIMs is active, the first network element buffers the downlink signaling or downlink Data; or, when there is downlink signaling or downlink data of the first USIM, and both the first USIM and the second USIM are in an inactive state, the first network element sends the downlink signaling or the downlink data.

According to the state of the first USIM and the state of the second USIM, the first PLMN sets the first USIM to the inactive state, and the state of any one of the second USIMs is the active state. The signaling or downlink data is buffered to avoid interruption of the service of the second USIM. When the first USIM and the second USIM are both in the inactive state, that is, when the first USIM and the second USIM have no service, the first PLMN directly sends the downlink signaling or downlink of the first USIM The data enables the services between the first USIM and other second USIMs to cooperate and coordinate with each other, and the overall service performance is improved.

With reference to the second aspect, in some implementations of the second aspect, the first network element is a core network element of the first PLMN, and before the first network element receives the first message from the terminal device, the method further includes: The network element authorizes the MUSIM communication of the terminal device.

With reference to the second aspect, in some implementations of the second aspect, the first network element authorizing the MUSIM communication of the terminal device includes: the first network element receives a second message from the terminal device, the second message carrying the terminal device's MUSIM capability information, the MUSIM capability information is used to indicate that the terminal device supports MUSIM; the first network element authorizes the MUSIM communication of the terminal device according to the MUSIM capability information of the terminal device and the subscription information of the first USIM; the first network element communicates with the terminal device A third message is sent, and the third message is used to instruct the terminal device to obtain the authorization of the first PLMN for MUSIM communication of the terminal device.

With reference to the second aspect, in some implementation manners of the second aspect, the first network element is an access network device of the first PLMN, and the first network element reports the first USIM of the terminal device according to the state of the second USIM. Optimizing signaling and/or data communication includes: the first network element according to the state of the first USIM and the state of the second USIM, if the state of the first USIM is in the active state, and any of the second USIMs The state of a USIM is in the active state. The first network element negotiates with the terminal device the sending and receiving capabilities occupied by the first USIM, and allocates the first USIM for signaling and/or data according to the negotiated sending and receiving capabilities The wireless resource sent.

The access network device of the first PLMN corresponding to the first USIM of the terminal device determines the sending and receiving capabilities allocated to the first USIM according to the status of the first USIM and the status of the second USIM, which can be: The first USIM allocates reasonable sending and receiving capabilities to maximize resource utilization.

With reference to the second aspect, in some implementations of the second aspect, after the first network element receives the first message from the terminal device, the method further includes: the first network element saves the state of the second USIM of the terminal device.

With reference to the second aspect, in some implementations of the second aspect, the method further includes: the first network element receives the changed state of at least one of the second USIMs from the terminal device; The state of the at least one USIM is updated to the changed state.

In a third aspect, the present application provides a communication device that has a function of implementing the method in the first aspect or any possible implementation manner thereof. The function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more units corresponding to the above-mentioned functions.

In a fourth aspect, the present application provides a communication device that has a function of implementing the method in the second aspect or any possible implementation manner thereof. The function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more units corresponding to the above-mentioned functions.

In an implementation manner, the communication device of the fourth aspect may belong to a core network. In another implementation manner, the communication device of the fourth aspect may belong to an access network.

In a fifth aspect, this application provides a terminal device, including a processor, a memory, and a transceiver. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory, and control the transceiver to send and receive signals, so that the terminal device executes the method in the first aspect or any possible implementation manner thereof.

In a sixth aspect, the present application provides a communication device, including a processor, a memory, and a transceiver. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory, and control the transceiver to send and receive signals, so that the communication device executes the method in the second aspect or any possible implementation manner thereof.

Optionally, the communication device may be an AMF. Optionally, the communication device may be an access network device (for example, gNB).

In a seventh aspect, the present application provides a computer-readable storage medium in which computer instructions are stored. When the computer instructions are run on a computer, the first aspect or any of its possible implementations The method is implemented.

In an eighth aspect, this application provides a computer-readable storage medium in which computer instructions are stored. When the computer instructions are run on a computer, the second aspect or any of its possible implementations The method is implemented.

In a ninth aspect, this application provides a computer program product. The computer program product includes computer program code. When the computer program code runs on a computer, the method in the first aspect or any of its possible implementations is achieve.

In a tenth aspect, the present application provides a computer program product. The computer program product includes computer program code. When the computer program code runs on a computer, the method in the second aspect or any of its possible implementations is achieve.

In an eleventh aspect, the present application provides a communication device including a processor. The processor is used to read and execute the computer program stored in the memory to execute the method in the first aspect or any possible implementation manner thereof.

Optionally, the communication device further includes a memory, and the memory and the processor are connected to the memory through a circuit or a wire. The memory is used to store computer program instructions and data necessary to realize the functions of the method of the foregoing first aspect or any possible implementation manner thereof.

Further optionally, the communication device further includes a communication interface.

In a twelfth aspect, the present application provides a communication device including a processor. The processor is used to read and execute the computer program stored in the memory to execute the method in the second aspect or any possible implementation manner thereof.

Optionally, the communication device further includes a memory, and the memory and the processor are connected to the memory through a circuit or a wire. The memory is used to store the computer program instructions and data necessary to realize the functions of the second aspect or any possible implementation methods thereof.

Optionally, the communication device described in the eleventh aspect and the communication device described in the twelfth aspect may be a chip or a circuit system. For example, system on chip (SoC), baseband chip, etc.

In a thirteenth aspect, the present application provides a communication device including a processor and an interface circuit, the interface circuit is configured to receive computer code or instructions and transmit them to the processor, and the processor is configured to run the computer code Or instructions to execute the method in the first aspect or any of its possible implementations.

In a fourteenth aspect, the present application provides a communication device including a processor and an interface circuit, the interface circuit is used to receive computer code or instructions and transmit them to the processor, and the processor is used to run the computer Code or instructions to execute the method in the first aspect or any possible implementation manner thereof.

In a fifteenth aspect, the present application provides a wireless communication system, including the terminal device described in the fifth aspect and/or the communication device described in the sixth aspect.

Optionally, the communication device of the sixth aspect may be a core network device and/or an access network device.

Description of the drawings

Fig. 1 is an architecture of a communication system applicable to an embodiment of the present application.

Figure 2 is a schematic diagram of the USIM of terminal devices with different communication capabilities.

Fig. 3 is a flowchart of the MUSIM communication method provided by this application.

Fig. 4 is an example of the MUSIM communication method provided by this application.

Fig. 5 is another example of the MUSIM communication method provided by this application.

Fig. 6 is another example of the MUSIM communication method provided by this application.

FIG. 7 is a schematic diagram of the connection state between the UE and the AMF and the state change of the USIM of the UE.

FIG. 8 is a schematic diagram of the connection state between the UE and the RAN and the state change of the UE's USIM.

Fig. 9 is an example of the status of the UE sending the USIM to the first network element provided by this application.

Fig. 10 is an example of the status of the UE sending the USIM to the first network element provided by this application.

Fig. 11 is another example of the status of the UE sending the USIM to the first network element provided by this application.

FIG. 12 is another example of the update of the status of the UE sending the USIM to the first network element provided by this application.

FIG. 13 is a schematic block diagram of a communication device provided by this application.

FIG. 14 is a schematic block diagram of a communication device provided by this application.

FIG. 15 is a schematic structural diagram of the communication device 10 provided by the present application.

FIG. 16 is a schematic structural diagram of the communication device 20 provided by the present application.

Detailed ways

The technical solution in this application will be described below in conjunction with the accompanying drawings.

Refer to FIG. 1, which is an architecture of a communication system applicable to an embodiment of the present application. The architecture can be applied to the fifth generation ^(the 5 ^th generation, 5G) wireless communication system. Among them, the functions of each network entity in the communication system are introduced as follows.

Radio access network (RAN): A network composed of multiple RAN nodes (for example, multiple 5G RAN nodes), which implements radio physical layer functions, resource scheduling and radio resource management, radio access control, and mobility Management function. The 5G-RAN is connected to the UPF through the user plane interface N3, and is used to transmit the data of the terminal equipment. The 5G-RAN establishes a control plane communication connection (or signaling connection) through the control plane interface N2 and AMF, which is used to implement functions such as radio access bearer control.

Access and mobility management function (AMF): Mainly responsible for terminal equipment authentication, terminal equipment mobility management, network slice selection, and session management function (session management function, SMF) selection functions, as The anchor point of the communication connection between N1 and N2, and provides the routing of N1/N2 session management (SM) messages for the session management function (session management function, SMF), and maintains and manages the state information of the terminal equipment.

SMF: Mainly responsible for all control plane functions of terminal device session management, including user plane function (UPF) selection, internet protocol (IP) address allocation, session quality of service (QoS) management And obtain policy and charging control (PCC) from the policy control function (PCF).

UPF: As the anchor point of the protocol data unit (PDU) session connection, it is responsible for data packet filtering, data transmission/forwarding, rate control, and charging information generation for user equipment.

Unified data management (UDM): Mainly used to manage user data, including the management of contract information. For example, the subscription information is obtained from a unified data repository (UDR) and provided to other network elements (for example, AMF), 3GPP authentication credentials are generated for the UE, and the network elements currently serving the UE are registered and maintained.

UDR: Mainly used to store user data, including subscription data called by UDM, policy information called by PCF, structured data for capability opening, and application data called by NEF.

Application service function (AF): interacts with the network elements of the core network to provide some services. For example, interacting with the PCF for service policy control, and providing some data network access point information to the PCF to generate corresponding data service routing information, etc.

In addition, the architecture shown in FIG. 1 also includes a data network (DN), a network slice selection function (NSSF), and an authentication server function (AUSF).

In addition, the interfaces between network elements shown in Fig. 1 are only examples. For example, the interface between RAN and AMF is N2, the interface between UE and AMF is N1, and the interface between AMF and PCF is N11.

In order to facilitate understanding, the related technologies involved in the technical solutions of the present application are briefly introduced below.

The universal subscriber identity module (USIM) is an application used for user identification. Compared with SIM, it can be considered as an upgraded SIM. USIM has upgraded the algorithm in terms of security and added the authentication function for the network, which has higher security performance.

Existing terminal devices can support multiple USIMs, and users of terminal devices also need to hold multiple USIMs at the same time. For example, it is used to contact different user groups or to meet different communication requirements. Moreover, in the future enterprise scenarios, there is a strong demand for one terminal device to support multiple USIMs.

Currently, terminal devices on the market have different communication capabilities. For example, single-receiving and single-transmitting (single Rx/single Tx), dual-receiving and single-transmitting (dual Rx/single Tx), and dual-receiving and dual transmission (dual Rx/dual Tx).

Refer to Figure 2, which is a schematic diagram of the USIM of terminal devices with different communication capabilities.

For example, for a dual SIM dual standby (DSDS) terminal device with only one Tx and one Rx, only one PLMN signal can be sent at the same time, and a PLMN signal can be received at the same time. Such a terminal device may be called a DSDS1.0 terminal, for example.

For another example, a dual-card dual-standby terminal device with one Tx and two Rx can only send one PLMN signal at the same time, but the terminal device can receive two PLMN signals at the same time. There will be a paging conflict problem. Such a terminal device may be called a DSDS2.0 terminal, for example. DSDS 2.0 does not support dynamic switching of uplink transmission between two systems, so it cannot maintain a radio resource control (Radio Resource Control, RRC) connection with two PLMNs at the same time.

For another example, for a terminal device with only one Tx and two Rx, it can not only receive two PLMN signals at one time, but also support the dynamic switching of uplink transmission between the two systems, and it can achieve two transmissions in time sharing. PLMN signals, so there will be no paging collisions, and RRC connections with two PLMNs can also be maintained. Such a terminal device may be called a DSDS3.0 terminal, for example.

In the existing mechanism, the PLMN corresponding to each USIM of the terminal device can perceive the status of its corresponding USIM, and only exchange signaling and/or data with the terminal device according to the status of the USIM.

For example, for a terminal device of DSDS 1.0, it can only receive signals from one PLMN at a time, and the network may conflict with the POs of two USIMs (denoted as USIM 1 and USIM 2), causing the terminal device to be unable to receive signals from the network to the other. USIM (assuming USIM 2) paging. However, the PLMN corresponding to USIM 2 does not perceive it, and continues to page USIM 2, resulting in a waste of network resources, and the network may even think that the terminal device is unreachable.

For example, for DSDS 2.0 terminal equipment, it is possible to receive two PLMN signals at the same time by switching some radio frequency channels, but the terminal equipment does not support maintaining radio resource control (RRC) connections of two PLMNs at the same time . Therefore, when the USIM 1 is active and the USIM 2 has downlink service paging, the PLMN corresponding to the USIM 2 does not indicate in the paging message that the USIM 2 of the terminal device currently has downlink services. Naturally, the terminal device cannot determine whether to respond to the page of USIM 2.

For another example, for a DSDS 3.0 terminal device, two PLMN signals can be received at one time. However, due to the limited capacity of a single receiver, the sending capacity of each USIM will be weakened. That is, the network cannot know that the terminal device is a DSDS 3.0 terminal device, and both USIM 1 and USIM 2 are in the active state, and therefore, it will not make full use of the communication capabilities of the terminal device to optimize services, such as optimizing scheduling resources and information. Order and/or data transmission, etc.

To this end, this application provides a MUSIM communication method, which aims to optimize the signaling and/or data of terminal devices supporting multiple USIMs, thereby improving system performance.

The technical solution of the present application will be described in detail below.

The numbers "first" and "second" appearing below are only used to distinguish different description objects, for example, to distinguish different USIMs, messages, etc., and do not mean the order of time or priority.

Referring to FIG. 3, FIG. 3 is a flowchart of a MUSIM communication method 300 provided by this application.

Optionally, the method 300 may be executed by a terminal device, or executed by a circuit system in the terminal device. Wherein, the circuit system may be a system on chip (system on chip, SoC) or a baseband chip installed in a terminal device.

In addition, the terminal device in this application may include at least two USIMs. Wherein, each of the at least two USIMs may correspond to a PLMN respectively. The PLMNs corresponding to different USIMs can be the same PLMN or different PLMNs, and there is no restriction.

Optionally, the PLMNs corresponding to the at least two USIMs may belong to the same operator (mobile network operator, MNO), or belong to different operators, which is not limited in this application.

Wherein, the at least two USIMs include a first USIM, and the PLMN corresponding to the first USIM is called the first PLMN. The first USIM may be any one of the at least two USIMs.

The second USIM includes USIMs other than the first USIM among the at least two USIMs. It is understandable that there may be one or more second USIMs.

310. The terminal device obtains the status of the second USIM.

Wherein, the state of each of the at least two USIMs of the terminal device includes an active state or an inactive state.

Alternatively, the activated state is also referred to as a connected state. The inactive state can also be referred to as an idle state.

Optionally, each USIM may also include working states other than the active state and the inactive state. For example, suspend.

320. The terminal device sends a first message to the network element of the first PLMN, where the first message carries the state of the second USIM.

Correspondingly, the network element of the first PLMN receives the first message from the terminal device, and obtains the state of the second USIM carried in the first message.

Optionally, the first message may be a registration request message, a service request message, or the like.

It should be noted that when the second USIM is multiple USIMs, the status of the second USIM may include the status of multiple USIMs, and may also include the status of some USIMs in the second USIM. For example, when there is a USIM in the active state of the second USIM, the state of the second USIM may only include the state of the USIM in the active state, or one bit may be used to indicate that the states of all USIMs in the second USIM are in the active state; Alternatively, when the second USIMs are all in the inactive state, the state of the second USIM may only report the state of one USIM, or one bit may be used to indicate that the states of all USIMs in the second USIM are in the inactive state.

Among them, the inactive state can be replaced with the idle state, which is not limited.

It is understandable that, in a report of the terminal device, the terminal device may send a part (for example, one or several) of the at least two USIMs other than the first USIM to the network element of the first PLMN, and the second USIM The status of the second USIM can also be sent to the network element of the first PLMN, which depends on the specific implementation and is not limited in this article.

Optionally, the network element of the first PLMN may include the network element of the core network of the first PLMN and/or the network element of the access network of the first PLMN, which is not limited here.

For example, the network element of the core network may be an access and mobility management function (AMF). The network element of the access network may be an access network device (for example, a base station).

Alternatively, the network element of the first PLMN may also be referred to as the first network element. Unless otherwise specified below, the first network element may refer to the network element of the core network of the first PLMN, or may refer to the network element of the access network of the first PLMN.

330. The network element of the first PLMN optimizes the signaling and/or data communication of the first USIM of the terminal device according to the state of the second USIM.

In the technical solution of the present application, the terminal device sends the status of the second USIM to the network element of the first PLMN corresponding to the first USIM, so that the network element of the first PLMN can learn in addition to the status of the first USIM. The status of other USIMs other than the first USIM. Furthermore, the first PLMN optimizes the signaling and/or data communication of the first USIM of the terminal device according to the state of the second USIM sent by the terminal device, which can improve the performance of the communication system.

It should be noted that the terminal device described in steps 310 and 320 may also be described as a terminal device of the first USIM, or a terminal device that works for the first USIM, or a terminal device that serves the first USIM. In other words, relative to PLMN, each USIM is equivalent to a terminal device or communication device.

Optionally, the above method further includes: after the network element of the first PLMN receives the state of the second USIM from the terminal device, saving the state of the second USIM.

In addition, the network element of the first PLMN can also obtain the status of the first USIM.

Optionally, the state of the first UISM may be sent by the terminal device to the network element of the first PLMN, so as to be learned by the network element of the first PLMN.

Optionally, it may also be obtained through perception by the network element of the first PLMN.

For example, when there is a communication connection between the network element of the first PLMN and the first USIM of the terminal device, the network element of the first PLMN determines that the state of the first USIM of the terminal device is the active state. When there is no communication connection between the network element of the first PLMN and the first USIM of the terminal device, the network element of the first PLMN determines that the state of the first USIM is an inactive state.

Optionally, after acquiring the state of the second USIM, the terminal device saves the state of the second USIM.

Exemplarily, the terminal device storing the state of the second USIM may be storing the state of the second USIM in the context of the first USIM, or storing the state of the second USIM in a public storage space. It is shared by all USIMs on the terminal device and is not limited here.

After the network element of the first PLMN obtains the state of the second USIM of the terminal device, it can optimize the signaling and/or data communication of the first USIM of the terminal device according to the state of the second USIM, which will be described in detail below .

Optionally, after the terminal device sends the state of the second USIM to the first PLMN, if the state of at least one USIM in the second USIM changes, the terminal device sends the change of the at least one USIM to the first PLMN The latter state enables the first PLMN to synchronously update the state of the second USIM whose state has changed. At the same time, the terminal device can also update the state of the second USIM whose state has changed, as described below in steps 340-360.

340. When the state of at least one USIM in the second USIM changes, the terminal device sends the changed state of the at least one USIM to the network element of the first PLMN.

The network element of the first PLMN receives the changed state of the at least one USIM from the terminal device.

350. The terminal device updates the saved state of the at least one USIM to the changed state of the at least one USIM.

360. The network element of the first PLMN updates the saved state of the at least one USIM to the changed state of the at least one USIM.

Subsequently, the network element of the first PLMN optimizes the signaling and/or data communication of the first USIM of the terminal device according to the updated state of the at least one USIM.

Here, there is no sequence between step 350 and step 360, and what is shown in FIG. 3 is only for illustration.

In addition, there is no sequence between the changed state of the at least one USIM sent by the terminal device to the network element of the first PLMN in step 350 and step 340.

For example, when the state of the at least one USIM changes, the terminal device may first update the saved state of the at least one USIM to the changed state, and then send it to the network element of the first PLMN. Alternatively, the terminal device may also send to the network element of the first PLMN first, and then update the saved state of the at least one USIM.

Optionally, in step 340, when the state of at least one USIM in the second USIM changes, the terminal device sends the changed state of the at least one USIM to the first PLMN. In other words, the terminal device can only send the status of the second USIM whose status has changed to the first PLMN.

In another implementation manner, the terminal device may send the status of the second USIM to the first PLMN. The state of the second USIM includes the changed state of the USIM whose state has changed in the second USIM, and the state of the USIM whose state has not changed. In other words, even if the status of some USIMs in the second USIM changes, the status of all USIMs in the second USIM can be sent.

Further, the terminal device may also send the status of the first USIM to the network element of the first PLMN. In other words, the terminal device sends the current status of all USIMs to the network element of the first PLMN.

Optionally, in step 340, when the state of at least one USIM in the second USIM changes, the terminal device sends the changed state of the at least one USIM to the network element of the first PLMN, and the terminal device may Send the changed state of the at least one USIM immediately.

It should be understood that sending immediately means that once the state of at least one USIM in the second USIM changes, the terminal device triggers the sending.

Or, in another possible situation, when the state of at least one USIM in the second USIM changes, the terminal device is in an inactive state (that is, the first USIM of the terminal device is in an inactive state), At this time, the terminal device does not send immediately, but waits for some time to send again. These occasions are also referred to as trigger conditions herein, such as the first trigger condition, the second trigger condition, and the third trigger condition below.

In other words, if the first USIM is in an inactive state and the state of at least one USIM in the second USIM changes, the terminal device does not immediately request to establish a communication connection with the first PLMN to send the first PLMN to the first PLMN. The changed state of at least one USIM. Only when some trigger conditions are met, the terminal device requests to establish a communication connection with the first PLMN, and sends the changed state of the at least one USIM to the network element of the first PLMN.

Several examples are given below.

For example, when the terminal device satisfies the first trigger condition, the terminal device sends a registration request message to the AMF of the first PLMN. The registration request message is used to request the establishment of a communication connection between the terminal device and the first PLMN, where the registration request message carries the The changed state of at least one USIM.

In this example, the first trigger condition may include expiration of a timer for periodic registration of the terminal device, or the terminal device moves out of the registration area, or the terminal device needs to negotiate parameters with the network element of the first PLMN.

As an example, the parameters may include: discontinuous reception (DRX) parameters, mobile initiated connection only (MICO) mode, slice selection assistance information (network slice selection assistance information, NSSAI), etc.

For another example, when the terminal device satisfies the second trigger condition, the terminal device sends a service request (service request) message to the AMF of the first PLMN, and the service request message is used to request the establishment of a communication connection between the terminal device and the first PLMN. Wherein, the service request message carries the changed state of the at least one USIM. or,

When the terminal device satisfies the second trigger condition, establish a communication connection between the terminal device and the first PLMN, and send a message carrying the changed state of the at least one USIM to the network element of the first PLMN.

In this example, the second trigger condition may include that the terminal device generates uplink data or signaling that needs to be sent.

For another example, when the terminal device satisfies the third trigger condition, the terminal device sends a service request message to the AMF of the first PLMN, and the service request message is used to request the establishment of a communication connection with the first PLMN. Wherein, the service request message carries the changed state of the at least one USIM. or,

When the terminal device satisfies the third trigger condition, establish a communication connection between the terminal device and the first PLMN, and send a message carrying the changed state of the at least one USIM to the first PLMN.

In this example, the third trigger condition may include that the terminal device receives the paging message of the first PLMN.

It is understandable that in the above examples, the trigger condition actually determines the time when the terminal device sends the changed state of the at least one USIM to the first PLMN. However, the terminal device sends the at least one USIM to the first PLMN. The changed state can be a message used to request to establish a communication connection with the first PLMN after the trigger condition is met, or it can be sent to the first PLMN through other messages after the communication connection with the first PLMN is established. The network element sends the changed state of the at least one USIM.

Optionally, in this application, the terminal device may obtain the state of the second USIM of the terminal device when or after registering to the first PLMN, and send it to the network element of the first PLMN. Alternatively, the terminal device can send the state of the second USIM to the network element of the PLMN only after obtaining the authorization of the first PLMN for the MUSIM communication of the terminal device.

The former case can be as described above for steps 310-320 of the method 300. In the latter case, before the terminal device sends the status of the second USIM to the network element of the first PLMN, it may further include steps 370-390.

370. The terminal device sends a second message to the core network element of the first PLMN, where the second message carries the MUSIM capability information of the terminal device.

Among them, the MUSIM capability information is used to indicate that the terminal device supports MUSIM, in other words, the terminal device supports MUSIM communication.

380. The core network element of the first PLMN determines that the MUSIM communication of the terminal device is allowed in the first PLMN according to the MUSIM capability information of the terminal device and the subscription information of the first USIM.

390. The core network element of the first PLMN sends a third message to the terminal device, where the third message is used to instruct the terminal device to obtain the authorization of the first PLMN for MUSIM communication of the terminal device.

Optionally, the terminal device may request the first PLMN to obtain authorization for MUSIM communication through the registration process.

Specifically, in step 370, the terminal device sends a registration request message to the core network element of the first PLMN, and the registration request message carries the MUSIM capability information of the terminal device.

If the core network element of the first PLMN authorizes the MUSIM communication of the terminal device according to the MUSIM capability information and the subscription information of the first USIM, the core network element of the first PLMN sends a registration acceptance message to the terminal device.

That is, the registration request message is an example of the second message, and the registration acceptance message is an example of the third message.

In one implementation, the registration acceptance message itself is used to instruct the terminal device to obtain the authorization of the first PLMN for MUSIM communication of the terminal device.

Specifically, if the core network element of the first PLMN allows the MUSIM communication of the terminal device, the core network element of the first PLMN may send a registration acceptance message to the terminal device. If the core network element of the first PLMN does not allow the MUSIM communication of the terminal device, the core network element of the first PLMN sends a registration failure message to the terminal device.

In another implementation, the registration acceptance message carries first indication information, and the first indication information is used to instruct the terminal device to obtain the authorization of the first PLMN for the MUSIM communication of the terminal device.

The above has described in detail how the terminal device sends the status of the second USIM to the PLMN and the changed status of the second USIM. The following describes how the terminal equipment optimizes the performance of paging response according to the status of the second USIM, and how the network element of the first PLMN responds to the signaling and/or the first USIM of the terminal equipment according to the status of the second USIM. Or data communication is optimized.

For the terminal device, the state of the second USIM can be used for the terminal device to respond to the paging message.

Optionally, the above method further includes: the terminal device receives a paging message of the first PLMN, the paging message is used to page a user corresponding to the first USIM or a user corresponding to the third USIM, wherein the third USIM is One of the second USIMs. The terminal device responds to the paging message according to the state of the first USIM and the state of the third USIM.

Those skilled in the art should understand that the paging message of the first PLMN is used to page the user corresponding to the first USIM and/or the user corresponding to the third USIM. The third USIM is one of the second USIMs.

Among them, the "user" mentioned here refers to a subscriber relative to the PLMN, not the user of the terminal device, and therefore, it should be distinguished from the user in popular terms.

In an example, a terminal device including USIM1 and USIM2 is taken as an example to illustrate how the terminal device responds to a paging message.

For example, when USIM1 is in an active state and the paging message is used to page a user corresponding to USIM2 (that is, an example of the third USIM), the terminal device responds to the paging message according to the user policy.

Among them, the user policy may include information used to indicate the user's preference for the service, or set service priority, for example, the set service priority and the mapping relationship between the set service and the USIM. Or the user policy may include a set priority of the USIM, for example, USIM1 is the first priority, USIM2 is the second priority, and the first priority is higher than the second priority.

In another example, when any one of the second USIMs is in an active state, and the paging message is used to page the corresponding user of the first USIM, the terminal device responds to the paging according to the user policy news.

In another example, when the first USIM is in an inactive state, and the second USIM is in an inactive state, and the paging message is used to page the user corresponding to the first USIM, the terminal device responds to the Paging message.

In another example, when the first USIM and the second USIM are both in an inactive state, and the paging message is used to page a user corresponding to the third USIM, the terminal device responds to the paging message. Among them, the third USIM is one of the second USIMs.

In the existing mechanism, when the terminal device receives a paging message, if the paging message is used to page the user corresponding to the first USIM, the terminal device only determines whether to respond to the paging message according to the status of the first USIM, and The status of other USIMs of the terminal device is not considered. When at least one USIM of the other USIMs of the terminal device is in the active state (for example, there is data and/or signaling communication), the terminal device will respond to the paging of the first USIM, which will result in the data of the USIM in the active state. And/or signaling communication is interrupted.

In the solution of this application, when the UE receives a paging message from the PLMN 1 to the UE's USIM 1, the PLMN 1 corresponding to the USIM 1 not only learns the status of the USIM 1, but also the status of the USIM 2. Therefore, if another USIM 2 of the UE is already active, the UE further decides whether to respond to the paging of the USIM 1 from the PLMN 1 according to the user policy. If both USIM 1 and USIM 2 are in an inactive state (inacitve), the UE responds to the paging of USIM 1 from PLMN 1.

Therefore, it can be avoided that if PLMN1 does not know the USIM 2 and does not page to the USIM 1, it will expand the paging range, increase the number of paging, and even think that the USIM 1 is unreachable, resulting in waste of paging resources and damage to the USIM 1. Misjudgment of the state. From the perspective of the terminal device, it can be avoided that the terminal device ignores the status of the USIM2 and responds to the paging of the first USIM, which causes the interruption of the data and/or signaling communication of the USIM2.

For the network element of the first PLMN, the state of the second USIM can be used to optimize the signaling and/or data communication of the first USIM of the terminal device.

Here, the network element of the first PLMN may be the core network element of the first PLMN, or may be the access network element of the first PLMN.

For example, when there is downlink signaling or downlink data of the first USIM, and the state of the first USIM is inactive and the state of any one of the second USIMs is in the active state, the network element of the first PLMN caches all the data. Said downlink signaling or downlink data.

For another example, when there is downlink signaling or downlink data of the first USIM, and the states of the first USIM and the second USIM are both inactive, the network element of the first PLMN sends the downlink signaling or the Downlink data.

Those skilled in the art can understand that before sending the downlink signaling or the downlink data to the terminal device of the first USIM, the network element of the first PLMN initiates the establishment of a communication connection with the terminal device, and transfers the first USIM to the terminal device. For the active state.

Optionally, when the network element of the first PLMN is an access network element of the first PLMN, the status of the second USIM may also be used to determine the sending and receiving capabilities of the first USIM.

For example, when the state of the first USIM is in the active state, and the state of any USIM in the second USIM is in the active state, the access network element of the first PLMN negotiates with the terminal device the transmission capability occupied by the first USIM and Receiving capability, and according to the negotiated sending capability and receiving capability, the first USIM is allocated radio resources for signaling and/or data communication.

For another example, when the state of the first USIM is in the active state and the states of the second USIM are in the inactive state, the access network element of the first PLMN determines that the first USIM exclusively monopolizes the sending and receiving capabilities of the terminal device.

According to the above description, in the technical solution of this application, the first USIM of the UE corresponds to the first PLMN. In addition to obtaining the status of the first USIM, the network element of the first PLMN can also obtain the first USIM of the UE through the report of the UE. 2. The status of the second USIM (one or more), and when the status of the second USIM changes, the status of the second USIM is synchronously updated through the report of the UE. The PLMNs corresponding to different USIMs of the UE can share the status of each other's USIM, so as to cooperate and coordinate work with each other, which can improve system performance.

Taking the first USIM (any USIM) of the UE as an example, the first PLMN corresponding to the first USIM can perform signaling, data transmission and resource allocation to the first USIM of the terminal device according to the status of the first USIM and the second USIM Wait for optimization.

In addition, the terminal device responds to the paging message of the first PLMN according to the status of the first USIM and the second USIM, so that the PLMNs corresponding to the first USIM and the second USIM can share the status of each other's USIM, which can optimize the pager system.

For example, when the UE receives a paging message from the PLMN 1 to one of the two USIMs of the UE, if the other USIM 2 of the UE is already active, the UE further decides according to the user policy Whether to respond to the paging of PLMN 1 to USIM 1. If both USIM 1 and USIM 2 are in an inactive state (inacitve), the UE responds to the paging of USIM 1 from PLMN 1.

Therefore, it can be avoided that if PLMN1 does not know the USIM 2 and does not page to the USIM 1, it will expand the paging range, increase the number of paging, and even think that the USIM 1 is unreachable, resulting in waste of paging resources and damage to the USIM 1. Misjudgment of the state.

For another example, for a UE that supports DSDS 2.0, if the service of USIM 1 is disconnected for a short time and the service of USIM 2 is switched, the UE sets the status of USIM (for example, USIM1: suspend, USIM2: active) to make USIM 1 Enter the "suspend state (suspend)". According to the status of USIM 1 and USIM 2, the UE can quickly resume the service of USIM 1 after completing the service of USIM 2.

Optionally, in another example, the "suspend" state of USIM 1 can also be set to "inacitive+cause information", where the reason information is used to indicate the reason why USIM 1 is converted from acitve to inactive, for example, the temporary suspension of services. Start or MUSIM communication or MUSIM communication switch. Therefore, after the UE completes the USIM 2, it actively resumes the service of the USIM 1.

For another example, for a UE that supports DSDS 2.0, the state of the UE's USIM 1 (any USIM) is set, for example, "suspend", so that the RAN and AMF perform special processing on the service of the UE's USIM 1. For example, the RAN maintains the fast recovery state of the RRC connection of the UE's USIM 1, the AMF buffers the USIM 1's mobile termination (MT) signaling or data transmission, and the AMF performs mobility management (mobile management) for multiple USIM communications. management, MM) optimization, etc.

For another example, for a UE that supports DSDS 3.0, by setting the state of the UE's USIM, such as "suspend", RAN and AMF can perform special processing on the UE. For example, RAN resource scheduling optimization, QoS degradation caused by Tx sharing, and AMF MM optimization for dual cards, etc.

The MUSIM communication method provided by the present application has been described in detail above, and an example will be described below.

Refer to FIG. 4, which is an example of the MUSIM communication method provided by this application.

401. The UE sends a registration request message to the AMF of the first PLMN.

Among them, the registration request message carries the MUSIM capability information of the terminal device. Among them, the MUSIM capability information is used to indicate that the terminal device supports MUSIM.

Alternatively, the MUSIM capability information may also be referred to as MUSIM support capability (MUSIM support capability) information.

The AMF receives the registration request message from the UE and obtains the MUSIM capability information therein.

In addition, the registration request message can also carry other information for registration. For example, the subscriber permanent identifier (SUPI) of the UE.

For brevity of description, unless otherwise specified, the AMF appearing below all refer to the AMF of the first PLMN.

402. The AMF obtains the subscription information of the first USIM.

Optionally, in an implementation, the subscription information of the first USIM is stored on the AMF.

In another implementation, if the subscription information of the first USIM is not saved on the AMF, the AMF obtains the SUPI of the UE from the registration request message of the UE or the locally saved UE context, and obtains the SUPI of the UE through the SUPI from unified data management (unified data management, UDM) Acquire the contract information of the first USIM.

Wherein, the subscription information of the UE includes information about whether to allow the first USIM of the UE to perform MUSIM communication in the PLMN corresponding to the first USIM (ie, the first PLMN). In other words, the subscription information of the UE of the first USIM includes information about whether the UE is allowed to perform MUSIM communication in the first PLMN corresponding to the first USIM.

403. The AMF determines whether to allow the UE to perform MUSIM communication in the first PLMN according to the MUSIM capability information of the UE and the subscription information of the first USIM.

In other words, the AMF determines whether to authorize the MUSIM communication of the UE in the first PLMN according to the MUSIM capability information of the UE and the subscription information of the first USIM.

Optionally, in another implementation, the AMF may determine whether to authorize the MUSIM communication of the UE according to the MUSIM capability information of the UE and the policy information of the first PLMN. The policy information of the first PLMN includes whether the first PLMN allows the MUSIM communication of the terminal device. Alternatively, the policy information of the first PLMN includes allowing the UE to cooperate with other PLMNs for multi-USIM communication.

If the AMF determines whether to authorize the MUSIM communication of the UE according to the MUSIM capability information and the policy information of the first PLMN, before step 403, the AMF may obtain the policy information of the first PLMN from the PCF, as in step 404.

404. A UE policy association is established between the AMF and the PCF, and the policy information of the first PLMN is obtained from the PCF.

For example, the AMF sends a UE policy control creation request (Npcf_UEPolicyControl Create Request) message to the PCF, where the UE policy control creation request message is used to request the PCF to generate the policy of the first USIM of the UE in the first PLMN.

The PCF returns a UE policy control creation response message (Npcf_UEPolicyControl Create Response) message to the AMF according to the request of the AMF. Wherein, the UE policy control generation response message carries the policy of the first PLMN.

In a possible situation, the policy information of the first PLMN indicates that the first PLMN does not allow MUSIM communication of the UE. In this case, the terminal device subsequently sends the state of the first USIM corresponding to the first PLMN to the first PLMN, which is the same as the prior art, and will not be described in detail here.

In another possible situation, the policy information of the first PLMN indicates that the first PLMN allows the MUSIM communication of the UE. In this case, AMF performs the next steps.

405. The AMF sends a registration acceptance message to the UE.

Wherein, the registration acceptance message is used to indicate that the UE obtains the authorization of the first PLMN for the MUSIM communication of the UE.

In a specific implementation, the registration acceptance message itself is used to instruct the UE to obtain the authorization of the first PLMN for the MUSIM communication of the UE.

In another specific implementation, the registration acceptance message may carry first indication information, and the first indication information is used to instruct the UE to obtain the authorization of the first PLMN for MUSIM communication of the UE.

For example, the first indication information may be "MUSIM allowed", or "MUSIM accepted", or "MUSIM authorized".

The UE receives the registration acceptance message from the AMF, and learns that the MUSIM communication of the UE is authorized by the first PLMN according to the registration acceptance message or the first indication information carried in the registration acceptance message. Thus, the UE can send the status of the second USIM to the network element of the first PLMN.

Optionally, the AMF may also perform step 406.

406. The AMF sends N2 signaling to the RAN.

Among them, the N2 signaling is used to instruct the UE to obtain the authorization of the first PLMN to communicate with the UE's MUSIM.

For example, N2 signaling can carry the information "MUSIM authorized", or "MUSIM accepted", or "MUSIM allowed".

After the UE obtains the authorization of the MUSIM communication of the UE by the first PLMN, the UE may send the status of the second USIM to the network element of the first PLMN.

In this application, the network elements of the first PLMN may include the network elements of the core network of the first PLMN (herein referred to as core network elements) and the network elements of the access network (herein referred to as access network elements).

For example, the UE sends the status of the second USIM to the RAN of the first PLMN, as in steps 408-409.

407. The UE sends an RRC message to the RAN of the first PLMN.

Wherein, the RRC message carries the state of the second USIM.

The RAN receives the RRC message from the UE and obtains the status of the second USIM.

408. The RAN saves the state of the second USIM.

For example, suppose that the UE includes a second USIM in addition to the first USIM (denoted as USIM 1), and the second USIM may include two USIMs (denoted as USIM 2, USIM 3). The states of USIM 2 and USIM 3 saved by the RAN can be as follows:

RRC connected with USIM 2 active and USIM 3 inactive;

RRC connected with USIM 2 active and USIM 3 active; or,

USIM 2 state: active; USIM 3 state: inactive;

USIM 2 state: active; USIM 3 state: active.

Optionally, the UE may also send the status of the second USIM to the core network of the first PLMN at the same time, as in steps 409-410.

409. The UE sends a non-access stratum (NAS) message to the AMF of the first PLMN, where the NAS message carries the state of the second USIM.

The AMF receives the NAS message from the UE and obtains the status of the second USIM.

410. The AMF saves the state of the second USIM.

AMF can be saved in a similar way to RAN. Continuing to take the terminal device including the first USIM (denoted as USIM 1) and the second USIM (including USIM 2 and USIM 3) as an example, the states of the USIM 2 and USIM 3 saved by the AMF may be as follows:

CM connected with USIM 2 active and USIM 3 inactive;

CM connected with USIM 2 active and USIM 3 active;

CM connected with USIM 2 inactive and USIM 3 inactive;

CM connected with USIM 2 inactive and USIM 3 active.

or,

USIM 2 state: active; USIM 3 state: inactive;

USIM 2 state: active; USIM 3 state: active.

USIM 2 state: inactive; USIM 3 state: inactive;

USIM 2 state: inactive; USIM 3 state: active.

It should be understood that RRC connected refers to the connection state between the UE and the RAN. Connection management (connected management, CM) connected indicates the connection status between the UE and the AMF.

Generally, the communication connection between a USIM and AMF of the UE is CM connected, and the communication connection between the USIM and RAN is RRC connected (corresponding to active in this application). When the communication connection between the USIM and AMF is in CM idle, the communication connection between USIM and RAN may be in RRC idle (corresponding to inactive in this application) or inactive (corresponding to suspend in this application).

It can be seen that in FIG. 4, after the UE obtains the authorization of the first PLMN to authorize the MUSIM communication of the UE, it sends the status of the second USIM to the RAN of the first PLMN and the AMF of the first PLMN.

In another implementation, after the UE obtains the authorization of the first PLMN for MUSIM communication of the UE, it sends the status of the second USIM to the network element (for example, AMF) of the core network of the first PLMN, and then the status of the second USIM is sent by the core network. The network element sends the status of the second USIM to the RAN of the first PLMN, which is described below with reference to FIG. 5.

Refer to FIG. 5, which is another example of the MUSIM communication method provided by this application.

501. The UE sends a registration request message to the AMF of the first PLMN.

Among them, the registration request message carries the MUSIM capability information of the UE, and the MUSIM capability information is used to indicate that the UE supports MUSIM.

502. The AMF obtains the subscription information of the first USIM.

503. The AMF determines whether to authorize the MUSIM communication of the UE according to the MUSIM capability information of the UE and the subscription information of the first USIM.

Optionally, in another implementation, the AMF may obtain the policy of the first PLMN from the PCF, and determine whether to authorize the UE's MUSIM communication only according to the policy of the first PLMN. At this time, step 503 can be replaced with step 504.

504. A UE policy association is established between the AMF and the PCF, and the policy information of the first PLMN is obtained from the PCF, and according to the policy information of the first PLMN, it is determined whether to authorize the MUSIM communication of the UE.

For the description of the policy information of the first PLMN, refer to step 403 above, which will not be repeated here.

For example, if the policy information of the first PLMN indicates that the first PLMN does not support MSUIM communication of the UE, the AMF may only determine that the UE is not allowed to perform MUSIM communication in the first PLMN based on the policy information of the first PLMN. Alternatively, the policy information of the first PLMN indicates that the first PLMN supports the MUSIM communication of the UE, and the UE reports the MUSIM support capability information, indicating that the UE supports MUSIM communication, and the AMF can allow the MUSIM communication of the UE.

In step 503 or step 504, if the first PLMN authorizes the UE's MUSIM communication, the AMF performs step 505 and subsequent steps.

505. The AMF sends a registration acceptance message to the UE.

Correspondingly, the UE receives the registration acceptance message from the AMF.

Optionally, step 506 may also be included.

506. The AMF sends N2 signaling to the RAN, where the N2 signaling is used to instruct the UE to obtain the authorization of the first PLMN for MUSIM communication of the UE.

507. The UE sends a NAS message to the AMF, where the NAS message carries the state of the second USIM.

508. The AMF saves the state of the second USIM.

509. The AMF sends N2 signaling to the RAN, where the N2 signaling carries the state of the second USIM.

The RAN receives the N2 signaling from the AMF, and obtains the status of the second USIM.

510. The RAN saves the state of the second USIM.

It can be seen that in the process shown in FIG. 5, after the UE sends the status of the second USIM to the AMF of the first PLMN, the AMF sends the status of the second USIM to the RAN of the first PLMN.

In still another implementation, after the UE obtains the authorization of the first PLMN for MUSIM communication of the UE, the UE sends the status of the second USIM to the network element (for example, RAN) of the access network of the first PLMN, and then the status of the second USIM is sent by the access network's The network element sends the state of the second USIM to the core network of the first PLMN, which is described below with reference to FIG. 6.

Refer to FIG. 6, which is another example of the MUSIM communication method provided by this application.

601. The UE sends a registration request message to the AMF of the first PLMN.

Among them, the registration request message carries the MUSIM capability information of the UE.

602. The AMF obtains the subscription information of the first USIM.

603. The AMF determines whether to authorize the MUSIM communication of the UE according to the MUSIM capability information of the UE and the subscription information of the first USIM.

Optionally, the AMF may determine whether to authorize the UE's MUSIM communication according to the MUSIM capability information and the policy information of the first PLMN. At this time, step 604 may also be included.

604. A UE policy association is established between the AMF and the PCF, and the policy information of the first PLMN is obtained from the PCF.

605. The AMF sends a registration acceptance message to the UE, where the registration acceptance message is used to instruct the UE to obtain the authorization of the first PLMN for MUSIM communication of the UE.

The UE receives the registration acceptance message from the AMF. According to the registration acceptance message, the UE learns that the first PLMN authorizes the UE's MUSIM communication.

Optionally, the registration acceptance message may be used to instruct the UE to obtain the authorization of the first PLMN for MUSIM communication of the UE. Alternatively, the registration acceptance message carries first indication information, and the first indication information is used to instruct the UE to obtain the authorization of the first PLMN for MUSIM communication of the UE.

Optionally, step 606 may also be included.

606. The AMF sends N2 signaling to the RAN, where the N2 signaling is used to instruct the UE to obtain the authorization of the first PLMN for MUSIM communication of the UE.

607. The UE sends an RRC message to the RAN, where the RRC message carries the status of the second USIM.

608. The RAN saves the state of the second USIM.

609. The RAN sends N2 signaling to the AMF, where the N2 signaling carries the state of the second USIM.

The AMF receives the N2 signaling from the RAN, and obtains the status of the second USIM.

610. The AMF saves the state of the second USIM.

The above has described in detail the process in which the UE obtains the authorization of the first PLMN for the UE's MUSIM communication, and after the UE obtains the authorization of the PLMN, the UE sends the second USIM to the first PLMN.

In many cases, after the UE sends the status of the second USIM to the network element of the first PLMN, the status of at least one USIM in the second USIM may change.

For example, the terminal device includes two USIMs in total, and the state change of the communication connection between the two USIMs and the AMF of the UE may be as shown in FIG. 7.

Referring to FIG. 7, FIG. 7 is a schematic diagram of the state change of the communication connection between the USIM and the AMF of the UE. As shown in Figure 7, the connection management (CM, connection management) state of the communication connection between the USIM 1 and the AMF may include two states: CM connected and CM idle. The status of the two USIMs of the UE may be active or inactive respectively. The status of each USIM can change.

For example, CM connected with USIM 1 active, USIM 2 inactive, can be converted to CM connected with USIM 1 active, USIM 2 active, that is, USIM 2 is converted from inactive to active.

For another example, CM connected with USIM 1 active, USIM 2 inactive, can be transformed into CM idle with USIM 1 inactive, USIM 2 inactive, that is, USIM 1 is transformed from active to inactive.

Other possible transformations can be shown in Figure 7 and will not be listed again.

For another example, the terminal device includes two USIMs in total, and the state change of the communication connection between the two USIMs and the AMF of the UE may be as shown in FIG. 8.

Referring to FIG. 8, FIG. 8 is a schematic diagram of the RRC state change of the communication connection between the USIM of the UE and the RAN. As shown in Figure 8, the communication connection between the USIM 1 and the RAN can include two states, RRC connected and RRC idle. The status of the two USIMs of the UE may be active or inactive respectively. The status of each USIM can change.

For example, RRC connected with USIM 1 active, USIM 2 inactive, can be transformed into RRC connected with USIM 1 active, USIM 2 active, that is, USIM 2 is transformed from inactive to active.

Conversely, RRC connected with USIM 1 active, USIM 2 active, can also be transformed into RRC connected with USIM 1 active, USIM 2 inactive, that is, USIM 2 is transformed from active to inactive.

In this application, when the state of at least one USIM in the second USIM of the terminal device changes, the UE sends the changed state of the at least one USIM to the network element of the PLMN, and the network element of the PLMN pairs The status of the changed second USIM is updated synchronously.

In this application, considering that the state of at least one USIM in the second USIM changes, the first USIM of the UE may be in CM-connected or CM-idle. Therefore, for the different states of the first USIM , The process when the UE sends the status update of the at least one USIM to the network side may be different.

For example, when the state of at least one USIM in the second USIM changes, if the first USIM of the UE is in the connected state, the UE sends the changed state of the at least one USIM. If the first USIM of the UE is in an idle state, the UE first establishes a communication connection with the first PLMN through a service request (service request) process, and then sends the changed state of the at least one USIM to the network element of the first PLMN.

Several examples of the changed state of the at least one USIM sent by the UE are given below.

It should be noted that the premise of FIGS. 9-12 is as described above, the terminal device includes at least two USIMs, where the at least two USIMs include a first USIM and a second USIM. Wherein, the state of at least one USIM in the second USIM changes.

Refer to FIG. 9, which is an example of the changed state of the UE sending the USIM provided by this application.

701. The state of at least one USIM in the second USIM of the UE changes.

According to the status of the communication connection between the first USIM of the UE and the AMF, the following cases 1 and 2 may be included.

Situation 1

The communication connection between the first USIM of the UE and the AMF is CM-connected.

702. The UE sends an RRC message to the RAN, where the RRC message carries the changed state of the at least one USIM.

The RAN receives the RRC message from the UE, and obtains the changed state of the at least one USIM.

703. The UE sends a NAS message to the AMF, where the NAS message carries the changed state of the at least one USIM.

The AMF receives the NAS message from the UE, and obtains the changed state of the at least one USIM.

After receiving the changed state of the at least one USIM, the RAN and the AMF synchronously update the state of the at least one USIM saved by the RAN and the CN, as in steps 704 and 705.

704. The RAN updates the saved state of the at least one USIM to a changed state.

705. The AMF updates the saved state of the at least one USIM to the changed state.

Situation 2

The communication connection between the first USIM and AMF of the UE is in CM-idle.

When the communication connection between the first USIM and AMF is CM-idle, the UE first establishes a communication connection with the network through a service request procedure (service reauest procedure), and at this time, the first USIM enters CM-connected from the CM-idle state. Such as steps 706-707.

706. The UE sends a service request (service request) message to the AMF. The service request message is used to request the establishment of a communication connection between the UE and the first PLMN.

Alternatively, it can also be expressed as that the service request message is used to instruct the UE to request to enter CM-connected.

It should be understood that the UE's request to enter CM-connected is actually the first USIM request of the UE to enter CM-connected. In other words, the UE mentioned in Figure 9-12 refers to the UE of the first USIM 1.

In an implementation, optionally, the service request message may carry a follow-on indication (following on indication), which is used to indicate the status that the UE will send the USIM in the future. In this application, the UE carries subsequent indication information in the service request message. After the communication connection is established between the UE and the AMF, the changed state of the at least one USIM is sent through the established communication connection.

The AMF receives the service request message from the UE.

707. The AMF sends a service accept (service accept) message to the UE. Among them, the service acceptance message is used to indicate the establishment of a communication connection between the AMF and the UE.

Among them, the service acceptance message is a NAS message.

It should be understood that the RAN includes the service acceptance message in the RRC connection reconfiguration message and sends it to the UE, which means that the communication connection between the RAN and the UE is established. When the UE receives the service acceptance message, it means that the communication connection between the first USIM and the AMF is established.

708. The first USIM of the UE enters CM-connected from CM idle.

709. The UE sends an RRC message to the RAN, where the RRC message carries the changed state of the at least one USIM.

710. The UE sends a NAS message to the AMF, where the NAS message carries the changed state of the at least one USIM.

After receiving the changed state of the at least one USIM, the RAN and the AMF synchronize the state of the at least one USIM saved by the RAN and the CN, as in steps 711 and 712.

711. The RAN updates the saved state of the at least one USIM to the changed state.

712. The AMF updates the saved state of the at least one USIM to the changed state.

In the following, another example of the changed state of the UE after sending the USIM is given in conjunction with FIG. 10.

Referring to FIG. 10, FIG. 10 is another example of the changed state of the UE after sending the USIM provided by this application.

801. The state of at least one USIM in the second USIM of the UE changes.

Situation 1

802. The UE sends a NAS message to the AMF, where the NAS message carries the changed state of the at least one USIM.

803. The AMF updates the saved state of the at least one USIM to the changed state.

804. The AMF sends N2 signaling to the RAN, where the N2 signaling carries the changed state of the at least one USIM.

The RAN receives the N2 signaling from the AMF, and obtains the changed state of the at least one USIM.

805. The RAN updates the saved state of the at least one USIM to the changed state.

It can be seen that when the first USIM of the UE is CM-connected, the UE may send the changed state of the at least one USIM to the AMF, so that the AMF can update the state of the at least one USIM synchronously. At the same time, the AMF sends the state of the at least one USIM to the RAN through N2 signaling, so that the RAN also realizes a synchronous update of the state of the at least one USIM.

Situation 2

As in case 2 shown in Figure 9, when the first USIM of the UE is in the CM-idle state, the UE first requests the first USIM to enter CM-connected through the service request process, and then sends the at least one USIM to the first PLMN The changed state.

806. The UE sends a service request message to the AMF. The service request message is used to request the establishment of a communication connection between the first USIM and the AMF.

The service request message may carry follow-on indication information.

The AMF receives the service request message from the UE.

807. The AMF sends a service acceptance message to the UE. Wherein, the service accept message is used to instruct to establish a communication connection between the AMF and the first USIM, so that the first USIM enters CM-connected.

808. The first USIM of the UE enters CM-connected.

809. The UE sends a NAS message to the AMF, where the NAS message carries the changed state of the at least one USIM.

810. The AMF updates the saved state of the at least one USIM to the changed state.

811. The AMF sends N2 signaling to the RAN, where the N2 signaling carries the changed state of the at least one USIM.

812. The RAN updates the saved state of the at least one USIM to the changed state.

Next, in conjunction with FIG. 11, another example of the changed state of the UE after sending the USIM is given.

Referring to FIG. 11, FIG. 11 is another example of the status of the UE sending the USIM provided by this application.

901. The state of at least one USIM in the second USIM of the UE changes.

According to the state of the UE, it can also be divided into the following case 1 and case 2.

Situation 1

902. The UE sends an RRC message to the RAN, where the RRC message carries the changed state of the at least one USIM.

903. The RAN updates the saved state of the at least one USIM to the changed state.

904. The RAN sends N2 signaling to the AMF, where the N2 signaling carries the changed state of the at least one USIM.

The AMF receives the N2 signaling from the RAN, and obtains the changed state of the at least one USIM.

905. The AMF updates the saved state of the at least one USIM to the changed state.

Situation 2

906. The UE sends a service request message to the AMF.

The AMF receives the service request message from the UE.

907. The AMF sends a service acceptance message to the UE.

Accordingly, the UE receives the service acceptance message from the AMF.

908. The first USIM of the UE enters CM-connected.

909. The UE sends an RRC message to the RAN, where the RRC message carries the changed state of the at least one USIM.

910. The RAN updates the saved state of the at least one USIM to the changed state.

911. The RAN sends N2 signaling to the AMF, where the N2 signaling carries the changed state of the at least one USIM.

The AMF receives N2 signaling from the RAN, and obtains the changed state of the at least one USIM.

912. The AMF updates the saved state of the at least one USIM to the changed state.

The above description in conjunction with Figures 9-11 describes how the UE sends the at least one USIM to the first PLMN if the status of at least one USIM in the second USIM changes after the UE sends the second USIM to the first PLMN. Various realizations of the changed state of the USIM. Therefore, the first PLMN access network and the core network can realize the synchronized update of the saved state of the second USIM, thereby optimizing the signaling and/or data communication of the terminal device.

In addition, in the example of Figures 9-11, when the status of at least one USIM in the second USIM of the UE changes, if the first USIM of the UE is CM connected, the at least one USIM is immediately sent to the first PLMN. The status of USIM is updated.

In another implementation, when the state of at least one USIM in the second USIM of the UE changes, if the first USIM of the UE is in CM idle, the UE does not immediately send the at least one USIM to the first PLMN The status is updated, but waits for the trigger condition to be met before sending. The following is an example with reference to Figure 12.

Referring to FIG. 12, FIG. 12 is another example of the changed state of the UE after sending the USIM provided by this application. It should be understood that the premise of the process shown in FIG. 12 is that the state of at least one USIM in the second USIM of the UE changes, and the first USIM of the UE is in CM idle.

Trigger condition 1 may include: the timer for periodic registration of the terminal device expires; the terminal device moves out of the registration area; or the terminal device needs to negotiate parameters with the network element of the first PLMN.

When the trigger condition 1 is met, the UE executes the registration process, such as steps 11-15.

11. The UE sends a registration request message to the AMF of the first PLMN. The registration request message is used to request the establishment of a communication connection between the UE and the first PLMN.

Wherein, the registration request message carries the changed state of the at least one USIM.

The AMF receives the registration request message of the UE, and obtains the changed state of the at least one USIM.

12. The AMF updates the saved state of the at least one USIM to the changed state.

13. The AMF sends N2 signaling to the RAN, where the N2 signaling carries the changed state of the at least one USIM.

14. The RAN updates the saved state of the at least one USIM to the changed state.

15. The AMF sends a service accept message to the UE.

Trigger condition 2 may include: uplink data or signaling is sent by the terminal device.

When the trigger condition 2 is met, the UE executes the service request process, such as steps 21-25.

21. The UE sends a service request message to the first PLMN, where the service request message is used to request the establishment of a communication connection between the UE and the first PLMN.

After the communication connection is established, the UE may carry the changed state of the at least one USIM to the RAN through an RRC message. Alternatively, the UE may carry the changed state of the at least one USIM to the AMF through a NAS message.

In another example, the UE may also send the changed state of the at least one USIM to the RAN and/or AMF in the service request procedure.

For example, the UE carries the changed state of the at least one USIM in an RRC Setup Complete (RRCSetupComplete) message, and sends it to the RAN, and/or the UE carries the changed state of the at least one USIM in a service request message. Status, send it to AMF.

The RAN receives the service request message from the UE and establishes a communication connection with the UE. If the UE sends the changed state of the at least one USIM through an RRC message after the communication connection is established, the RAN obtains the changed state of the at least one USIM from the RRC message sent by the UE. Alternatively, if the UE sends the changed state of the at least one USIM through an RRC message (for example, RRCsetupComplete) in the service request procedure, the RAN obtains the state of the at least one USIM from the RRC message in the service request procedure.

22. The RAN updates the saved state of the at least one USIM to the changed state.

23. The UE sends a NAS message to the AMF. The NAS message carries the changed state of the at least one USIM, as described in step 21.

The AMF receives the NAS message from the UE, and obtains the changed state of the one or more second USIMs.

24. The AMF updates the saved state of the at least one USIM to the changed state.

25. The AMF sends a service acceptance message to the UE. The UE receives the service acceptance message from the AMF.

Trigger condition 3 may include: the terminal device receives the paging message of the first PLMN.

When the trigger condition 3 is met, the UE executes the service request process, such as steps 31-36.

31. The UE sends an RRC message to the RAN of the first PLMN. The RRC message is used to request the establishment of a communication connection between the UE and the first PLMN.

Similar to the implementation of trigger condition 2 above, the UE may carry the state of the at least one USIM through an RRC message after the communication connection between the RAN and the UE is established, and send it to the RAN. Or, the UE carries the changed state of the at least one USIM through a NAS message, and sends it to the AMF.

In another example, the UE may send the changed state of the at least one USIM to the RAN and/or AMF in the service request procedure.

For example, the UE carries the changed state of the at least one USIM in an RRC Setup Complete (RRCSetupComplete) message, and sends it to the RAN.

The RAN receives the RRC message of the UE, and obtains the changed state of the at least one USIM.

Alternatively, if the UE sends the changed state of the at least one USIM through an RRC message (for example, RRCsetupComplete) in the service request procedure, the RAN obtains the state of the at least one USIM from the RRC message in the service request procedure.

32. The RAN updates the saved state of the at least one USIM to the changed state.

33. The RAN sends N2 signaling to the AMF, where the N2 signaling carries the changed state of the at least one USIM.

The AMF receives N2 signaling from the RAN, and obtains the changed state of the one or more second USIMs.

34. The AMF updates the saved state of the at least one USIM to the changed state.

35. The AMF sends a service acceptance message to the UE.

In an example that satisfies the trigger condition 3, the UE sends the changed state of the at least one USIM to the RAN of the first PLMN through an RRC message during the process of executing the service request procedure.

In another implementation, after establishing a communication connection with the first PLMN, the UE sends a message carrying the state of the at least one USIM to the network element of the first PLMN.

The MUSIM communication method provided by this application has been described in detail above. The following describes the communication device for MUSIM communication provided by this application.

Referring to FIG. 13, FIG. 13 is a schematic block diagram of a communication device 1000 provided by this application. Wherein, the communication device 1000 is configured to execute the procedures and/or operations performed by the UE in FIGS. 3-6 and 9-12. As shown in FIG. 13, the communication device 1000 includes a processing unit 1100 and a transceiving unit 1200.

The processing unit 1100 is configured to obtain the status of a second USIM of at least two USIMs, the second USIM includes USIMs other than the first USIM among the at least two USIMs, and the first USIM corresponds to the PLMN;

The transceiver unit is configured to send a first message to the network element of the first PLMN, where the first message carries the state of the second USIM.

Optionally, the transceiving unit 1200 may also be replaced by a sending unit or a receiving unit. For example, when the transceiving unit 1200 performs a sending action, it can be replaced by a sending unit. When the transceiver unit 1200 performs a receiving action, it can be replaced by a receiving unit.

Optionally, in an embodiment, the first message also carries the status of the first USIM.

Optionally, in an embodiment, the processing unit 1100 is further configured to obtain the authorization of the first PLMN for MUSIM communication of the communication device.

Optionally, in an embodiment, the network element of the first PLMN includes a core network element of the first PLMN and/or an access network element of the first PLMN.

Optionally, in an embodiment, the transceiving unit 1200 is further configured to:

Sending a second message to the core network element of the first PLMN, the second message carrying MUSIM capability information of the communication device, and the MUSIM capability information is used to indicate that the communication device supports MUSIM;

A third message is received from the core network element of the first PLMN, where the third message is used to instruct the communication device to obtain the authorization of the first PLMN for MUSIM communication of the communication device.

Optionally, in one embodiment, the second message is a registration request message, and the third message is a registration acceptance message.

Optionally, in an embodiment, the processing unit 1100 is further configured to determine that the state of at least one USIM in the second USIM has changed;

And, the transceiving unit 1100 is further configured to send the changed state of the at least one USIM to the network element of the first PLMN.

Optionally, in an embodiment, the processing unit 1100 is configured to determine that the state of the at least one USIM has changed, and the first USIM is in an inactive state, and,

When it is determined that the first trigger condition is satisfied, the transceiver unit 1200 is configured to send a registration request message to the network element of the first PLMN, where the registration request message is used to request to establish a connection between the communication device and the first PLMN. Communication connection, wherein the registration request message carries the changed state of the at least one USIM, and the first trigger condition includes: expiration of a timer for periodic registration of the communication device, or the communication The device moves out of the registration area, or the communication device needs to negotiate parameters with the network element of the first PLMN;

or,

When it is determined that the second trigger condition is satisfied, the transceiver unit 1100 is configured to send a service request message to the network element of the first PLMN, and the service request message is used to request to establish a connection between the communication device and the first PLMN. Communication connection, wherein the service request message carries the changed state of the at least one USIM, or when it is determined that the second trigger condition is satisfied, the processing unit 1200 is configured to control the transceiver unit 1100 to establish the communication The communication connection between the device and the first PLMN, and the transceiving unit 1100 is configured to send a message carrying the changed state of the at least one USIM to the network element of the first PLMN, and the second trigger condition includes There is uplink data or signaling transmission in the communication device;

or,

When it is determined that the third trigger condition is satisfied, the transceiver unit 1100 is configured to send a service request message to the network element of the first PLMN, and the service request message is used to request the establishment of the communication device and the first PLMN. Communication connection, wherein the service request message carries the changed state of the at least one USIM, or, when it is determined that the third trigger condition is satisfied, the processing unit 1200 is configured to control the transceiver unit 1100 to establish the The communication connection between the communication device and the first PLMN, and the transceiving unit is configured to send a message carrying the changed state of the at least one USIM to a network element of the first PLMN, and the third trigger The condition includes that the communication device receives the paging message of the first PLMN.

Optionally, in an embodiment, the communication device further includes:

The storage unit 1300 is configured to store the state of the second USIM.

Optionally, in an embodiment, the processing unit 1100 is further configured to: update the state of the at least one USIM to the changed state.

Optionally, in an embodiment, the transceiving unit 1200 is further configured to receive a paging message, the paging message being used to page the user corresponding to the first USIM and/or the user corresponding to the third USIM , The third USIM is one of the second USIMs; and,

The processing unit 1100 is further configured to respond to the paging message according to the paging message, the state of the first USIM, and the state of the third USIM.

Optionally, in an embodiment, the processing unit 1100 is configured to:

When the state of the first USIM is in the active state and the paging message is used to page the user corresponding to the third USIM, respond to the paging message according to the user policy; or,

When the state of the third USIM is in the active state, and the paging message is used to page the corresponding user of the first USIM, respond to the paging message according to the user policy; or,

When the states of the first USIM and the third USIM are both inactive, and the paging message is used to page the user corresponding to the first USIM, respond to the paging message; or,

When the states of the first USIM and the third USIM are both inactive, and the paging message is used to page the user corresponding to the third USIM, respond to the paging message.

Optionally, in a possible situation, the communication apparatus 1000 may be a terminal device.

In this case, the transceiver unit 1200 may be a transceiver. The transceiver may include a receiver and a transmitter. The processing unit 1100 may be a processing device.

Optionally, in another possible situation, the communication device 1000 may be a circuit system of a combination device or component in a terminal device that can realize the functions of the terminal device in the embodiments of the present application, for example, a chip or an integrated circuit.

In this case, the transceiver unit 1200 may be a communication interface. For example, the transceiver unit 1200 may be an input/output interface or an input/output circuit. The input and output interface may include an input interface and an output interface. The input and output circuit may include an input circuit and an output circuit. The processing unit 1100 may be a processing device.

Among them, the function of the processing device can be realized by hardware, or by hardware executing corresponding software.

For example, the processing device may include one or more memories and one or more processors, where the one or more memories are used to store a computer program, and the one or more processors read and execute the one or more The computer programs stored in multiple memories enable the communication device 1000 to perform corresponding operations and/or processing performed by the terminal device in the method and method embodiments.

Optionally, the processing device may only include a processor, and the memory for storing the computer program is located outside the processing device. The processor is connected to the memory through a circuit/wire to read and execute the computer program stored in the memory.

Optionally, the transceiving unit 1200 may be a radio frequency device, and the processing unit 1100 may be a baseband device.

Referring to FIG. 14, FIG. 14 is a schematic block diagram of a communication device 2000 provided by this application. Wherein, the communication device 2000 is configured to execute the core network element (for example, AMF) or the access network element (for example, the access network corresponding to the RAN) of the first PLMN in FIGS. 3-6 and 9-12. The process and/or operation performed by the equipment). Unless otherwise specified, the communication device 2000 may be AMF or RAN. Only when the communication device 2000 is specifically limited to be a core network element, the communication device 2000 executes the processing and/or operations performed by the AMF in FIGS. 3-6 and 9-12. Or, only when the communication device 2000 is specifically limited to be an access network element, the communication device 2000 executes the processing and/or operations performed by the RAN in FIGS. 3-6 and 9-12.

As shown in FIG. 14, the communication device 2000 includes a transceiving unit 2100 and a processing unit 2200.

The transceiver unit 2100 is configured to receive a first message from a terminal device, the first message carrying the status of a second USIM, the terminal device includes at least two USIMs, and the second USIM includes the at least two USIMs except A USIM other than the first USIM, where the first network element belongs to a first PLMN corresponding to the first USIM;

The processing unit 2200 is configured to optimize the signaling and/or data communication of the first USIM of the terminal device according to the state of the second USIM.

Optionally, the transceiving unit 2100 may also be replaced by a sending unit or a receiving unit. For example, when the transceiver unit 2100 performs a sending action, it can be replaced by a sending unit. When the transceiver unit 2100 performs a receiving action, it can be replaced by a receiving unit.

Optionally, in an embodiment, the communication device 2000 further includes a storage unit 2300, and the processing unit is configured to:

When it is determined that there is downlink signaling or downlink data of the first USIM, and the state of the first USIM is the inactive state and the state of any one of the second USIMs is the active state, the storage unit 2300 is controlled Buffer the downlink signaling or downlink data; or,

When it is determined that there is downlink signaling or downlink data of the first USIM, and the first USIM and the second USIM are both in an inactive state, the transceiver unit 2100 is controlled to send the downlink signaling or the Downlink data.

Optionally, in an embodiment, the processing unit 2200 is further configured to authorize MSUIM communication of the terminal device.

Optionally, in an embodiment, the transceiving unit 2100 is further configured to receive a second message from the terminal device, the second message carrying MUSIM capability information of the terminal device, and the MUSIM capability information is used for To indicate that the terminal device supports MUSIM;

The processing unit 2200 is configured to authorize MUSIM communication of the terminal device according to the MUSIM capability information of the terminal device and the subscription information of the first USIM;

The transceiving unit 2100 is further configured to send a third message to the terminal device, where the third message is used to instruct the terminal device to obtain the authorization of the first PLMN for MUSIM communication of the terminal device.

Optionally, in an embodiment, the communication apparatus 2000 is an access network device of the first PLMN, and the processing unit 2200 is configured to:

According to the state of the first USIM and the state of the second USIM, if the state of the first USIM is the active state, and the state of any one of the second USIMs is the active state, the terminal device Negotiate the sending and receiving capabilities occupied by the first USIM, and allocate radio resources for signaling and/or data transmission to the first USIM according to the negotiated sending and receiving capabilities.

Optionally, in an embodiment, the storage unit 2300 is further configured to save the state of the second USIM of the terminal device.

Optionally, in an embodiment, the transceiving unit 2100 is further configured to receive a changed state of at least one USIM in the second USIM from the terminal device;

And, the processing unit 2200 is further configured to update the state of the at least one USIM to the changed state.

Optionally, in a possible situation, the communication apparatus 2000 may be a communication device (for example, a network device).

In this case, the transceiver unit 2100 may be a transceiver. The transceiver may include a receiver and a transmitter. The processing unit 2200 may be a processing device.

Optionally, in another possible situation, the communication device 2000 may be a circuit system installed in a communication device, for example, a chip or an integrated circuit.

In this case, the transceiver unit 2100 may be a communication interface. For example, the transceiver unit 2100 may be an input/output interface or an input/output circuit. The input and output interface may include an input interface and an output interface. The input and output circuit may include an input circuit and an output circuit. The processing unit 2200 may be a processing device.

For example, the processing device may include one or more memories and one or more processors, where the one or more memories are used to store a computer program, and the one or more processors read and execute the one or more The computer programs stored in the multiple memories enable the communication device 2000 to execute the operations and/or processing performed by the first network element (or the network element of the first PLMN) in each method embodiment.

Optionally, the transceiver unit 2100 may be a radio frequency device, and the processing unit 2200 may be a baseband device.

Refer to FIG. 15, which is a schematic structural diagram of the communication device 10 provided in the present application. As shown in FIG. 15, the communication device 10 includes: one or more processors 11, one or more memories 12, and one or more communication interfaces 13. Among them, the processor 11 is used to control the communication interface 13 to send and receive signals, the memory 12 is used to store computer programs, and the processor 11 is used to call and run the computer programs from the memory 12, so that the communication device 10 executes each method implementation of the application Examples of processing and/or operations performed by the terminal device.

For example, the processor 11 may have the function of the processing unit 1100 shown in FIG. 13, and the communication interface 13 may have the function of the transceiving unit 1200 shown in FIG. 13. For details, please refer to the description in FIG. 13, which will not be repeated here.

Optionally, when the communication device 10 is a terminal device, the processor 11 may be a baseband device installed in the terminal device, and the communication interface 13 may be a radio frequency device.

Refer to FIG. 16, which is a schematic structural diagram of the communication device 20 provided in the present application. As shown in FIG. 16, the communication device 20 includes: one or more processors 21, one or more memories 22, and one or more communication interfaces 23. The processor 21 is used to control the communication interface 23 to send and receive signals, the memory 22 is used to store computer programs, and the processor 21 is used to call and run the computer programs from the memory 22, so that the communication device 20 executes the various method embodiments of the present application. Processing and/or operations performed by the first network element (for example, AMF or RAN).

For example, the processor 21 may have the function of the processing unit 2200 shown in FIG. 14, and the communication interface 23 may have the function of the transceiving unit 2100 shown in FIG. For details, please refer to the description in FIG. 14, which will not be repeated here.

Optionally, when the communication device 20 is a network device (for example, an access network device or a core network device), the processor 11 may be a baseband device installed in the network device, and the communication interface 13 may be a radio frequency device.

Optionally, the memory and the memory in the foregoing device embodiments may be physically independent units, or the memory may also be integrated with the processor.

In addition, this application also provides a computer-readable storage medium. The computer-readable storage medium stores computer instructions. When the computer instructions run on the computer, the computer executes the MUSIM communication method provided by this application and is executed by the terminal device. Operation and/or processing.

This application also provides a computer-readable storage medium. The computer-readable storage medium stores computer instructions. When the computer instructions run on the computer, the computer executes the MUSIM communication method provided by this application. The first network element ( That is, the operation and/or processing performed by the network element of the first PLMN.

This application also provides a computer program product. The computer program product includes computer program code. When the computer program code runs on a computer, the computer executes the operations and/or processing performed by the terminal device in the MUSIM communication method provided in this application. .

This application also provides a computer program product. The computer program product includes computer program code. When the computer program code runs on a computer, it causes the computer to perform the operations performed by the first network element in the MUSIM communication method provided by this application and/ Or deal with.

The present application also provides a communication device, including a processor and an interface circuit, the interface circuit is used to receive computer code or instructions, and transmit to the processor, the processor is used to run the computer code or instructions to Perform operations and/or processing performed by the terminal device in the MUSIM communication method provided in this application.

The present application also provides a communication device, including a processor and an interface circuit, the interface circuit is used to receive computer code or instructions, and transmit to the processor, the processor is used to run the computer code or instructions to Perform operations and/or processing performed by the first network element in the MUSIM communication method provided in this application.

The application also provides a chip including one or more processors. The one or more processors are used to execute a computer program stored in the memory to execute operations and/or processing performed by the terminal device in any method embodiment. Wherein, the memory for storing the computer program is provided independently of the chip.

Further, the chip may also include one or more communication interfaces. The one or more communication interfaces may be input/output interfaces, input/output circuits, and the like. Further, the chip may also include one or more of the memories.

The application also provides a chip including one or more processors. The one or more processors are configured to execute a computer program stored in the memory to execute operations and/or processing performed by the first network element in any method embodiment. Wherein, the memory for storing the computer program is provided independently of the chip.

In addition, this application also provides a wireless communication system, including the terminal device and/or the first network element in the embodiment of this application.

Specifically, the wireless communication system includes one or more of the access network device and the core network device of the first PLMN in the embodiment of the present application. Further, the wireless communication system may also include the terminal device or UE in the embodiment of the present application.

For example, the wireless communication system may include terminal equipment, or the terminal equipment and the access network equipment of the first PLMN, or the terminal equipment and the core network equipment of the first PLMN, or the terminal equipment and the access network equipment and core of the first PLMN.网设备。 Net equipment.

The processor in the embodiment of the present application may be an integrated circuit chip, which has the ability to process signals. 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 processor can be a general-purpose processor, digital signal processor (digital signal processor, DSP), application specific integrated circuit (ASIC), field programmable gate array (field programmable gate array, FPGA) or other programmable logic Devices, discrete gates or transistor logic devices, discrete hardware components. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like. 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 encoding processor, or executed and completed by a combination of hardware and software modules in the encoding processor. The software module can be located in a mature storage medium in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

The memory in the embodiments of the present application may be volatile memory or 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), 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, DRRAM). 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.

The terms "unit", "system", etc. used in this specification are used to denote computer-related entities, hardware, firmware, a combination of hardware and software, software, or software in execution. For example, the component may be, but is not limited to, a process, a processor, an object, an executable file, an execution thread, a program, and/or a computer running on a processor. Through the illustration, both the application running on the computing device and the computing device can be components. One or more components may reside in a process and/or thread of execution. The components may be located on one computer and/or distributed between two or more computers. In addition, these components can be executed from various computer readable media having various data structures stored thereon. A component can be based on data that has one or more data packets (for example, data from two components that interact with another component in a local system, a distributed system, and/or a network, for example, the Internet that interacts with other systems through signals) Signals are communicated through local and/or remote processes.

A person of ordinary skill in the art may realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed by hardware or software 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.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

The system, device, and method provided in this application can be implemented in other ways. For example, the device embodiments described above are merely illustrative, for example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

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

If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of the present application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory, random access memory, magnetic disk or optical disk and other media that can store program codes.

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application. Should be covered within the scope of protection of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

A method for multi-universal user identification module MUSIM communication is characterized in that it is applied to a terminal device including at least two universal user identification modules USIM, and the method includes:

The terminal device acquires the status of a second USIM of the at least two USIMs, where the second USIM includes USIMs other than the first USIM among the at least two USIMs, and the first USIM and the first public land mobile Network PLMN correspondence;

The terminal device sends a first message to the network element of the first PLMN, where the first message carries the state of the second USIM.
The method according to claim 1, wherein the first message also carries the status of the first USIM.
The method according to claim 1 or 2, wherein before the terminal device obtains the status of the second USIM of the at least two USIMs, the method further comprises:

The terminal device obtains the authorization of the first PLMN for the MUSIM communication of the terminal device.
The method according to any one of claims 1-3, wherein the network element of the first PLMN comprises a core network element of the first PLMN and/or an access network of the first PLMN Network element.
The method according to claim 3 or 4, wherein the terminal device obtaining the authorization of the first PLMN for the MUSIM communication of the terminal device comprises:

Sending, by the terminal device, a second message to the core network element of the first PLMN, the second message carrying MUSIM capability information of the terminal device, and the MUSIM capability information is used to indicate that the terminal device supports MUSIM;

The terminal device receives a third message from the core network element of the first PLMN, where the third message is used to instruct the terminal device to obtain the authorization of the first PLMN for MUSIM communication of the terminal device.
The method according to claim 5, wherein the second message is a registration request message, and the third message is a registration acceptance message.
The method according to any one of claims 1-6, wherein the method further comprises:

When the state of at least one USIM in the second USIM changes, the terminal device sends the changed state of the at least one USIM to the network element of the first PLMN.
The method according to claim 7, wherein when the state of the at least one USIM changes and the first USIM is in an inactive state, the terminal device sends a message to the network element of the first PLMN The changed state of the at least one USIM includes:

The terminal device sends a registration request message to the network element of the first PLMN when the first trigger condition is met, and the registration request message is used to request the establishment of a communication connection between the terminal device and the first PLMN, where: The registration request message carries the changed state of the at least one USIM, and the first trigger condition includes: the timer for periodic registration of the terminal device expires, or the terminal device moves out of the registration area, Or the terminal device needs to negotiate parameters with the network element of the first PLMN;

or,

The terminal device sends a service request message to the network element of the first PLMN when the second trigger condition is met, where the service request message is used to request the establishment of a communication connection between the terminal device and the first PLMN, where: The service request message carries the changed state of the at least one USIM, or the terminal device establishes a communication connection with the first PLMN when the second trigger condition is satisfied, and sends the communication connection to the network element of the first PLMN Sending a message carrying the changed state of the at least one USIM, where the second trigger condition includes the presence of uplink data or signaling transmission on the terminal device;

or,

The terminal device sends a service request message to the network element of the first PLMN when the third trigger condition is met, and the service request message is used to request the establishment of a communication connection between the terminal device and the first PLMN, where: The service request message carries the changed state of the at least one USIM, or the terminal device establishes a communication connection with the first PLMN when the third trigger condition is satisfied, and sends the information to the network of the first PLMN. The element sends a message carrying the changed state of the at least one USIM, and the third trigger condition includes that the terminal device receives a paging message from the first PLMN.
The method according to any one of claims 1-8, wherein after the terminal device obtains the status of the second USIM of the at least two USIMs, the method further comprises:

The terminal device saves the state of the second USIM.
The method according to any one of claims 7-9, wherein when the state of at least one USIM in the second USIM changes, the method further comprises:

The terminal device updates the state of the at least one USIM to the changed state.
The method according to any one of claims 1-10, wherein the method further comprises:

The terminal device receives a paging message, the paging message is used to page the user corresponding to the first USIM and/or the user corresponding to the third USIM, and the third USIM is one of the second USIMs USIM;

The terminal device responds to the paging message according to the paging message, the state of the first USIM, and the state of the third USIM.
The method according to claim 11, wherein the terminal device responds to the paging message according to the paging message, the state of the first USIM, and the state of the third USIM, comprising:

When the state of the first USIM is in the active state and the paging message is used to page the user corresponding to the third USIM, the terminal device responds to the paging message according to the user policy; or,

When the state of the third USIM is the active state and the paging message is used to page the corresponding user of the first USIM, the terminal device responds to the paging message according to the user policy; or,

When the states of the first USIM and the third USIM are both inactive, and the paging message is used to page the user corresponding to the first USIM, the terminal device responds to the paging message ;or,

When the states of the first USIM and the third USIM are both inactive, and the paging message is used to page the user corresponding to the third USIM, the terminal device responds to the paging message .
A method for multi-universal user identification module MUSIM communication is characterized in that it is applied to a terminal device including at least two universal user identification modules USIM, and the method includes:

The first network element receives a first message from a terminal device, the first message carries the status of a second USIM, and the second USIM includes a USIM other than the first USIM among the at least two USIMs, and The first network element belongs to the first public land mobile network PLMN corresponding to the first USIM;

The first network element optimizes the signaling and/or data communication of the first USIM of the terminal device according to the state of the second USIM.
The method according to claim 13, wherein the first message also carries the status of the first USIM.
The method according to claim 13 or 14, wherein the first network element performs signaling and/or data communication of the first USIM of the terminal device according to the state of the second USIM Optimization, including:

When there is downlink signaling or downlink data of the first USIM, and the state of the first USIM is in the inactive state and the state of any one of the second USIMs is in the active state, the first network element caches The downlink signaling or downlink data; or,

When there is downlink signaling or downlink data of the first USIM, and the states of the first USIM and the second USIM are both inactive, the first network element sends the downlink signaling or the Describe the downstream data.
The method according to any one of claims 13-15, wherein the first network element is a core network element of the first PLMN, and the first network element receives a first message from a terminal device Before, the method also includes:

The first network element authorizes MUSIM communication of the terminal device.
The method according to claim 16, wherein the authorization of the MUSIM communication of the terminal device by the first network element comprises:

The first network element receives a second message from the terminal device, the second message carries MUSIM capability information of the terminal device, and the MUSIM capability information is used to indicate that the terminal device supports MUSIM;

The first network element authorizes the MUSIM communication of the terminal device according to the MUSIM capability information of the terminal device and the subscription information of the first USIM;

The first network element sends a third message to the terminal device, where the third message is used to instruct the terminal device to obtain the authorization of the first PLMN for MUSIM communication of the terminal device.
The method according to claim 13, wherein the first network element is an access network device of the first PLMN,

The first network element optimizing the signaling and/or data communication of the first USIM of the terminal device according to the state of the second USIM includes:

According to the state of the first USIM and the state of the second USIM, the first network element, if the state of the first USIM is the active state, and the state of any one of the second USIMs is the active state The first network element negotiates with the terminal equipment the sending and receiving capabilities occupied by the first USIM, and allocates the first USIM for signaling and/or according to the negotiated sending and receiving capabilities The wireless resource for data transmission.
The method according to any one of claims 13-18, wherein after the first network element receives the first message from the terminal device, the method further comprises:

The first network element saves the state of the second USIM of the terminal device.
The method according to claim 19, wherein the method further comprises:

Receiving, by the first network element, the changed state of at least one USIM in the second USIM from the terminal device;

The first network element updates the state of the at least one USIM to the changed state.
A communication device, characterized in that it includes at least two universal user identification modules USIM, and the communication device includes:

The processing unit is configured to obtain the status of a second USIM of the at least two USIMs, where the second USIM includes USIMs other than the first USIM among the at least two USIMs, and the first USIM and the first USIM Corresponding to public land mobile network PLMN;

The transceiver unit is configured to send a first message to the network element of the first PLMN, where the first message carries the state of the second USIM.
The communication device according to claim 21, wherein the first message also carries the status of the first USIM.
The communication device according to claim 21 or 22, wherein the processing unit is further configured to obtain the authorization of the first PLMN for MUSIM communication of the communication device.
The communication device according to any one of claims 21-23, wherein the network element of the first PLMN comprises a core network element of the first PLMN and/or an access of the first PLMN Network network element.
The communication device according to claim 23 or 24, wherein the transceiver unit is further configured to:

Sending a second message to the core network element of the first PLMN, the second message carrying MUSIM capability information of the communication device, and the MUSIM capability information is used to indicate that the communication device supports MUSIM;

A third message is received from the core network element of the first PLMN, where the third message is used to instruct the communication device to obtain the authorization of the first PLMN for MUSIM communication of the communication device.
The communication device according to claim 25, wherein the second message is a registration request message, and the third message is a registration acceptance message.
The communication device according to any one of claims 21-26, wherein the processing unit is further configured to determine that the state of at least one USIM in the second USIM has changed;

And, the transceiving unit is further configured to send the changed state of the at least one USIM to the network element of the first PLMN.
The communication device according to claim 27, wherein the processing unit is configured to determine that the state of the at least one USIM has changed, and the first USIM is in an inactive state, and,

When it is determined that the first trigger condition is met, the transceiver unit is used to send a registration request message to the network element of the first PLMN, where the registration request message is used to request to establish communication between the communication device and the first PLMN Connection, wherein the registration request message carries the changed state of the at least one USIM, and the first trigger condition includes: the timer for periodic registration of the communication device expires, or the communication device Move out of the registration area, or the communication device needs to negotiate parameters with the network element of the first PLMN;

or,

When it is determined that the second trigger condition is satisfied, the transceiver unit is used to send a service request message to the network element of the first PLMN, where the service request message is used to request to establish communication between the communication device and the first PLMN Connection, wherein the service request message carries the changed state of the at least one USIM, or when it is determined that the second trigger condition is satisfied, the processing unit is configured to control the transceiver unit to establish the communication device and The communication connection of the first PLMN, and the transceiving unit is configured to send a message carrying the changed state of the at least one USIM to the network element of the first PLMN, and the second trigger condition includes the communication The device has uplink data or signaling transmission;

or,

When it is determined that the third trigger condition is satisfied, the transceiver unit is used to send a service request message to the network element of the first PLMN, where the service request message is used to request to establish communication between the communication device and the first PLMN Connection, wherein the service request message carries the changed state of the at least one USIM, or, when it is determined that the third trigger condition is satisfied, the processing unit is used to control the transceiver unit to establish the communication device A communication connection with the first PLMN, and the transceiving unit is configured to send a message carrying the changed state of the at least one USIM to a network element of the first PLMN, and the third trigger condition includes the The communication device receives the paging message of the first PLMN.
The communication device according to any one of claims 21-28, wherein the communication device further comprises:

The storage unit is used to save the state of the second USIM.
The communication device according to any one of claims 27-29, wherein the processing unit is further configured to:

Updating the state of the at least one USIM to the changed state.
The communication device according to any one of claims 21-30, wherein the transceiving unit is further configured to receive a paging message, and the paging message is used to page the user and user corresponding to the first USIM. / Or a user corresponding to a third USIM, where the third USIM is one of the second USIMs; and,

The processing unit is further configured to respond to the paging message according to the paging message, the state of the first USIM, and the state of the third USIM.
The communication device according to claim 31, wherein the processing unit is configured to:

When the state of the first USIM is in the active state and the paging message is used to page the user corresponding to the third USIM, respond to the paging message according to the user policy; or,

When the state of the third USIM is in the active state, and the paging message is used to page the corresponding user of the first USIM, respond to the paging message according to the user policy; or,

When the states of the first USIM and the third USIM are both inactive, and the paging message is used to page the user corresponding to the first USIM, respond to the paging message; or,

When the states of the first USIM and the third USIM are both inactive, and the paging message is used to page the user corresponding to the third USIM, respond to the paging message.
A communication device, characterized in that it comprises:

The transceiver unit is configured to receive a first message from a terminal device, the first message carrying the status of a second USIM, the terminal device includes at least two USIMs, and the second USIM includes the at least two USIMs except for the first USIM. A USIM other than the USIM, where the first network element belongs to the first public land mobile network PLMN corresponding to the first USIM;

The processing unit is configured to optimize the signaling and/or data communication of the first USIM of the terminal device according to the state of the second USIM.
The communication device according to claim 33, wherein the first message also carries the status of the first USIM.
The communication device according to claim 33 or 34, wherein the communication device further comprises a storage unit, and the processing unit is configured to:

When it is determined that there is downlink signaling or downlink data of the first USIM, and the state of the first USIM is the inactive state and the state of any one of the second USIMs is the active state, control the storage unit to buffer The downlink signaling or downlink data; or,

When it is determined that there is downlink signaling or downlink data of the first USIM, and the states of the first USIM and the second USIM are both inactive, control the transceiver unit to send the downlink signaling or the downlink data. Describe the downstream data.
The communication device according to any one of claims 33-35, wherein the processing unit is further configured to authorize MSUIM communication of the terminal device.
The communication device according to claim 36, wherein the transceiving unit is further configured to receive a second message from the terminal device, the second message carrying MUSIM capability information of the terminal device, and the MUSIM The capability information is used to indicate that the terminal device supports MUSIM;

The processing unit is configured to authorize MUSIM communication of the terminal device according to the MUSIM capability information of the terminal device and the subscription information of the first USIM;

The transceiver unit is further configured to send a third message to the terminal device, where the third message is used to instruct the terminal device to obtain the authorization of the first PLMN for MUSIM communication of the terminal device.
The communication device according to claim 33, wherein the communication device is an access network device of the first PLMN, and the processing unit is configured to:

According to the state of the first USIM and the state of the second USIM, if the state of the first USIM is the active state, and the state of any one of the second USIMs is the active state, the terminal device Negotiate the sending and receiving capabilities occupied by the first USIM, and allocate radio resources for signaling and/or data transmission to the first USIM according to the negotiated sending and receiving capabilities.
The communication device according to any one of claims 33-38, wherein the communication device further comprises:

The storage unit is also used to save the state of the second USIM of the terminal device.
The communication device according to claim 39, wherein the transceiving unit is further configured to receive a changed state of at least one of the second USIMs from the terminal device;

And, the processing unit is further configured to update the state of the at least one USIM to the changed state.
A communication device, characterized in that it comprises at least one processor, and the at least one processor is coupled with at least one memory:

The at least one processor is configured to execute a computer program or instruction stored in the at least one memory, so that the communication device executes the method according to any one of claims 1-12.
A communication device, characterized in that it comprises at least one processor, and the at least one processor is coupled with at least one memory:

The at least one processor is configured to execute a computer program or instruction stored in the at least one memory, so that the communication device executes the method according to any one of claims 13-20.
A computer-readable storage medium, characterized by comprising computer instructions, and when the computer instructions are executed, the method according to any one of claims 1-12 is implemented.
A computer-readable storage medium, characterized by comprising computer instructions, and when the computer instructions are executed, the method according to any one of claims 13-20 is implemented.
A wireless communication system, characterized by comprising the communication device according to any one of claims 21-32, and/or the communication device according to claims 33-40.