A communication method and communication apparatus for a terminal

Abstract

Embodiments of the present application provide a communication method and a communication device for a terminal. According to the method, in the case of supporting service concurrency, the dual-card capability of the terminal can be dynamically allocated, the reduction of the terminal capability corresponding to one SIM card causes the increase of the terminal capability corresponding to another SIM card, or the increase of the terminal capability corresponding to one SIM card causes the reduction of the terminal capability corresponding to another SIM card, so that the dual-card resources can be maximally used, and the overall performance of the multi-SIM card terminal can be improved.

Description

Technical Field

[0001] This application relates to the field of wireless communication technology, and more particularly to a communication method and communication device for a terminal. Background Technology

[0002] A terminal typically has two or more Subscriber Identity Module (SIM) cards. Taking a dual-SIM dual-active (DSDA) terminal as an example, to ensure that the services of both SIM cards can be performed simultaneously (i.e., concurrent services, such as one SIM card for making calls and the other for internet access), the terminal can report the terminal capabilities corresponding to both SIM cards to the access network equipment. These two SIM cards share the terminal's capability specifications, and the sum of the terminal capabilities of the two SIM cards equals the terminal's capability specifications. Subsequently, the access network equipment allocates corresponding resources to each SIM card based on its corresponding terminal capabilities. Therefore, the two SIM cards can concurrently execute services based on the resources allocated by the access network equipment.

[0003] With the increasing popularity of multi-SIM card terminals, it is necessary to study how to further improve the overall performance of multi-SIM card terminals. Summary of the Invention

[0004] This application provides a communication method and communication device for a terminal, which can improve the overall performance of a terminal with multiple SIM cards.

[0005] In a first aspect, embodiments of this application provide a communication method for a terminal, which can be executed by the terminal or a module (such as a chip) in the terminal. Taking the terminal executing the method as an example, the method includes: sending first capability information to a first access network device, the first capability information indicating a first terminal capability corresponding to a first SIM card; sending second capability information to a second access network device, the second capability information indicating a second terminal capability corresponding to a second SIM card; when the terminal capability corresponding to the first SIM card is updated from the first terminal capability to a third terminal capability, sending third capability information to the first access network device, the third capability information indicating the third terminal capability corresponding to the first SIM card; and responding to the update of the terminal capability corresponding to the first SIM card, sending fourth capability information to the second access network device, the fourth capability information indicating... The fourth terminal capability corresponding to the second SIM card is shown; wherein the first terminal capability, the second terminal capability, the third terminal capability, and the fourth terminal capability are all less than the capability specification of the terminal, the capability specification of the terminal is shared by the first SIM card and the second SIM card, and the sum of the first terminal capability and the second terminal capability is greater than or equal to the capability specification of the terminal, and the sum of the third terminal capability and the fourth terminal capability is greater than or equal to the capability specification of the terminal; when the third terminal capability is less than the first terminal capability, then the fourth terminal capability is greater than the second terminal capability; or, when the third terminal capability is greater than the first terminal capability, then the fourth terminal capability is less than the second terminal capability.

[0006] The above solution allows for dynamic allocation of dual-SIM capabilities in a terminal while supporting concurrent services. A decrease in the terminal capability corresponding to one SIM card can lead to an increase in the terminal capability corresponding to the other SIM card, or vice versa. This maximizes the use of dual-SIM resources and helps improve the overall performance of multi-SIM terminal devices.

[0007] In one possible implementation, before sending the third capability information to the first access network device, a first indication information is sent to the first access network device, which triggers a query for the terminal capability corresponding to the first SIM card; a first capability query request is received from the first access network device, which is used to request a query for the terminal capability corresponding to the first SIM card.

[0008] In one possible implementation, before sending the fourth capability information to the second access network device, a second indication information is sent to the second access network device, which triggers a query for the terminal capability corresponding to the second SIM card; a second capability query request is received from the second access network device, which is used to request a query for the terminal capability corresponding to the second SIM card.

[0009] In one possible implementation, the terminal's capability specifications include one or more of the following:

[0010] This terminal supports a maximum number of cells for carrier aggregation.

[0011] The maximum number of MIMO layers supported by this terminal;

[0012] The terminal's supplementary uplink capabilities;

[0013] The terminal's wireless access capability;

[0014] The terminal supports the maximum channel bandwidth on a frequency band combination.

[0015] The terminal supports modulation levels on a frequency band combination;

[0016] The frequency band combinations / bands supported by this terminal; or,

[0017] The communication standards supported by this terminal.

[0018] In one possible implementation, at least one of the first terminal capability, the second terminal capability, the third terminal capability, and the fourth terminal capability satisfies one or more of the following:

[0019] It supports the largest number of cells for carrier aggregation;

[0020] It supports the most MIMO layers;

[0021] Supports supplementary uplink features;

[0022] Supports wireless access capabilities;

[0023] The maximum channel bandwidth supported on a frequency band combination is the largest.

[0024] The highest modulation level is supported on a frequency band combination;

[0025] The maximum number of supported frequency band combinations / band ranges; or,

[0026] It supports the highest level of communication standards.

[0027] Secondly, embodiments of this application provide a communication device, which can be a terminal or a chip for a terminal. The device has the function of implementing any of the methods described in the first aspect. This function can be implemented in hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-described functions.

[0028] Thirdly, embodiments of this application provide a communication device, including a processor and a memory; the memory is used to store computer instructions, and when the device is running, the processor executes the computer instructions stored in the memory to cause the device to perform any of the implementation methods in the first aspect described above. The memory may be volatile or non-volatile memory, such as a cache in a semiconductor chip.

[0029] Fourthly, embodiments of this application provide a communication device including a processor coupled to a memory, the processor being configured to invoke a program stored in the memory to execute any implementation method described in the first aspect above. The memory may be located within or outside the device. The processor may also be one or more processors.

[0030] Fifthly, embodiments of this application provide a communication apparatus including units or means for performing the various steps of any of the implementation methods in the first aspect described above.

[0031] Sixthly, embodiments of this application provide a communication device, including a processor and an interface circuit. The processor is used to communicate with other devices through the interface circuit and to execute any implementation method in the first aspect described above. The processor may be one or more processors.

[0032] In practical implementation, the communication device can be a chip, the input circuit can be an input pin, the output circuit can be an output pin, and the processing circuit can be a transistor, gate circuit, flip-flop, and various logic circuits. The input signal received by the input circuit can be received and input by, for example, but not limited to, a receiver, and the signal output by the output circuit can be output to, for example, but not limited to, a transmitter and transmitted by the transmitter. Furthermore, the input circuit and the output circuit can be the same circuit, which is used as the input circuit and the output circuit at different times. This application does not limit the specific implementation of the processor and various circuits.

[0033] In one implementation, the communication device can be a wireless communication device, i.e., a computer device that supports wireless communication functions. Specifically, the wireless communication device can be a terminal such as a smartphone. A system-on-a-chip (SoC) is also called a system-on-chip (SoC). The communication chip may include a baseband processing chip and a radio frequency (RF) processing chip. The baseband processing chip is sometimes referred to as a modem or baseband chip. The RF processing chip is sometimes referred to as an RF transceiver or RF chip. In physical implementation, some or all of the communication chips can be integrated within the SoC chip. For example, the baseband processing chip is integrated into the SoC chip, while the RF processing chip is not integrated with the SoC chip. The interface circuit can be the RF processing chip in the wireless communication device, and the processing circuit can be the baseband processing chip in the wireless communication device.

[0034] In another implementation, the wireless communication device can be a component of a communication equipment, such as a system-on-a-chip (SoC) or communication chip, or other integrated circuit products. The interface circuit can be an input / output interface, interface circuit, output circuit, input circuit, pins, or related circuits on the chip or chip system. The processor can also be represented as a processing circuit or logic circuit.

[0035] In a seventh aspect, embodiments of this application also provide a computer-readable storage medium storing a computer program or instructions that, when executed on a communication device, cause any of the implementation methods in the first aspect to be performed.

[0036] Eighthly, embodiments of this application also provide a computer program product, which includes a computer program or instructions that, when run on a communication device, cause any of the implementation methods in the first aspect to be executed.

[0037] In a ninth aspect, embodiments of this application also provide a chip system, including: a processor for executing any of the implementation methods in the first aspect described above. Attached Figure Description

[0038] Figure 1 This application provides a schematic diagram of the structure of a wireless communication system according to an embodiment of the present application.

[0039] Figure 2 This is a schematic diagram of the structure of a wireless communication device provided in an embodiment of this application;

[0040] Figure 3 This is a schematic diagram of the UE communication process;

[0041] Figure 4 This is a schematic diagram of the RRC state transition process;

[0042] Figure 5 A schematic diagram of the UE communication process to support concurrent dual-SIM services;

[0043] Figure 6 A schematic diagram of a communication device provided in an embodiment of this application;

[0044] Figure 7 This is a schematic diagram of a communication device provided in an embodiment of this application. Detailed Implementation

[0045] The technical solution of this application is mainly applicable to wireless communication systems. These wireless communication systems can comply with the wireless communication standards of the Third Generation Partnership Project (3GPP), or other wireless communication standards, such as the IEEE 802 series (e.g., 802.11, 802.15, or 802.20) wireless communication standards.

[0046] Figure 1 This is a schematic diagram of the structure of a wireless communication system applicable to the embodiments of this application. The wireless communication system includes an access network device and one or more terminals. According to the transmission direction, the transmission link from the terminal to the access network device is denoted as the uplink (UL), and the transmission link from the access network device to the terminal is denoted as the downlink (DL). Data transmission in the uplink can be referred to as uplink data transmission or uplink transfer, and data transmission in the downlink can be referred to as downlink data transmission or downlink transfer.

[0047] In this wireless communication system, access network devices can provide communication coverage for a specific geographical area through integrated or external antenna devices. One or more terminals located within the communication coverage area of ​​the access network device can access the access network device. An access network device can manage one or more cells. Each cell has an identification, also known as a cell identity (cell ID). From a radio resource perspective, a cell is a combination of downlink radio resources and its paired uplink radio resources (optional).

[0048] Terminals and access network devices are aware of the predefined configuration of the wireless communication system, including the radio access technologies (RATs) supported by the system and the system-specified radio resource configurations (such as the basic configuration of radio frequency bands and carriers). A carrier is a frequency range defined by the system. This frequency range can be determined by the carrier's center frequency (denoted as the carrier frequency) and the carrier's bandwidth. These predefined system configurations can be part of the standard protocol of the wireless communication system, or determined through interaction between the terminal and access network devices. The content of the relevant standard protocols may be pre-stored in the memory of the terminal and access network devices, or embodied in the hardware circuitry or software code of the terminal and access network devices.

[0049] In this wireless communication system, the terminal and access network equipment support one or more of the same Radio Access Platforms (RATs), such as New Radio (NR), Long Term Evolution (LTE), or the RAT of Future Evolution systems. Specifically, the terminal and access network equipment use the same air interface parameters, coding schemes, and modulation schemes, and communicate with each other based on the radio resources specified by the system.

[0050] The terminal in this application embodiment is a device with wireless transceiver capabilities, which can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; it can also be deployed on water (such as on ships, etc.); and it can also be deployed in the air (e.g., on airplanes, balloons, and satellites). The terminal can be a mobile phone, tablet computer, computer with wireless transceiver capabilities, virtual reality (VR) terminal, augmented reality (AR) terminal, wireless terminal in industrial control, wireless terminal in self-driving, wireless terminal in remote medical care, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, user equipment (UE), etc. In the embodiments of this application, a UE is used as an example of a terminal for description.

[0051] Access network equipment can be a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next-generation NodeB (gNB) in a 5G mobile communication system, a next-generation base station in a 6G mobile communication system, a base station in a future mobile communication system, or an access node in a wireless fidelity (WiFi) system; it can also be a module or unit that performs some of the functions of a base station, for example, it can be a central unit (CU) or a distributed unit (DU). Access network equipment can be a macro base station (such as... Figure 1 110a in the text), can also be a micro base station or an indoor station (such as... Figure 1 110b) in the above can also be a relay node or a donor node, etc. The embodiments of this application do not limit the specific technology or device form used in the access network equipment. In the embodiments of this application, a base station is used as an example of an access network device for description.

[0052] Figure 2 This is a schematic diagram of a wireless communication device provided in an embodiment of this application. The wireless communication device can be a terminal or a base station as described in this embodiment. The wireless communication device may include multiple components, such as: an application subsystem, memory, massive storage, a baseband subsystem, a radio frequency integrated circuit (RFIC), a radio frequency front end (RFFE) device, and an antenna (ANT). These components can be coupled through various interconnect buses or other electrical connection methods.

[0053] Figure 2 In this code, ANT_1 represents the first antenna, ANT_N represents the Nth antenna, and N is an integer greater than 1. Tx represents the transmit path, and Rx represents the receive path; different numbers represent different paths. Each path can represent a signal processing channel. FBRx represents the feedback receive path, PRx represents the main receive path, and DRx represents the diversity receive path. HB represents high frequency, and LB represents low frequency; these refer to the relative high and low frequencies. BB represents baseband. It should be understood that... Figure 2The labels and components shown are for illustrative purposes only and represent one possible implementation. Other implementations are also included in this application. For example, a wireless communication device may include more or fewer paths and more or fewer components.

[0054] The application subsystem may include one or more processors. Multiple processors may include multiple processors of the same type, or a combination of different types of processors. In this application, the processor may be a general-purpose processor or a processor designed for a specific domain. For example, the processor may be a central processing unit (CPU), a digital signal processor (DSP), or a microcontroller (MCU). The processor may also be a graphics processing unit (GPU), an image signal processor (ISP), an audio signal processor (ASP), and an AI processor specifically designed for artificial intelligence (AI) applications. AI processors include, but are not limited to, neural network processing units (NPUs), tensor processing units (TPUs), and processors referred to as AI engines.

[0055] Radio frequency (RF) integrated circuits (including RFIC 1 and one or more optional RFIC 2) and RF front-end devices can together form an RF subsystem. Depending on the signal reception or transmission path, the RF subsystem can also be divided into an RF receive path and an RF transmit path. The RF receive path receives RF signals via an antenna, processes the RF signals (e.g., amplification, filtering, and down-conversion) to obtain a baseband signal, and then transmits it to the baseband subsystem. The RF transmit path receives baseband signals from the baseband subsystem, processes the baseband signals (e.g., up-conversion, amplification, and filtering) to obtain an RF signal, and finally radiates the RF signal into space via an antenna. RF integrated circuits can be referred to as RF processing chips or RF chips.

[0056] Similar to the radio frequency (RF) subsystem, which primarily handles RF signal processing, the baseband subsystem primarily processes baseband signals. The baseband subsystem can extract useful information or data bits from the baseband signals, or convert information or data bits into baseband signals to be transmitted. These information or data bits can represent user data such as voice, text, and video, or control information. For example, the baseband subsystem can perform signal processing operations such as modulation and demodulation, encoding and decoding. The baseband signal processing operations are not entirely the same for different wireless access technologies, such as 5G NR and 4G LTE.

[0057] Similar to the application subsystem, the baseband subsystem may also include one or more processors. Furthermore, the baseband subsystem may include one or more hardware accelerators (HACs). Hardware accelerators can be used to perform sub-functions with higher processing overhead, such as data packet assembly and parsing, and data packet encryption and decryption. These sub-functions can also be implemented using general-purpose processors, but due to performance or cost considerations, using hardware accelerators may be more suitable. In specific implementations, hardware accelerators are primarily implemented using application-specific integrated circuits (ASICs). Of course, hardware accelerators can also include one or more relatively simple processors, such as MCUs.

[0058] A baseband subsystem can be integrated into one or more chips, which may be called a baseband processing chip or baseband chip. Alternatively, the baseband subsystem can be a standalone chip, which may be called a modem or modem chip. Baseband subsystems can be manufactured and sold as modem chips. Modem chips are sometimes also referred to as baseband processors or mobile processors. Furthermore, the baseband subsystem can be further integrated into a larger chip, manufactured and sold as a larger chip. This larger chip may be called a system-on-a-chip (SoC), or simply a SoC chip. The software components of the baseband subsystem can be built into the chip's hardware components before the chip leaves the factory, or imported into the chip's hardware components from other non-volatile memory after the chip leaves the factory, or these software components can be downloaded and updated online via a network.

[0059] In addition, the wireless communication device may also include a memory, for example Figure 2The system includes main memory and large-capacity storage. Additionally, application subsystems and baseband subsystems may each include one or more caches. In specific implementations, memory can be divided into volatile memory and non-volatile memory (NVM). Volatile memory refers to memory whose data is lost when the power supply is interrupted. Currently, volatile memory is mainly random access memory (RAM), including static random access memory (SRAM) and dynamic random access memory (DRAM). Non-volatile memory refers to memory whose data is not lost even when the power supply is interrupted. Common non-volatile memories include read-only memory (ROM), optical discs, hard disks, and various memories based on flash memory technology. Generally speaking, main memory and cache can use volatile memory, while large-capacity storage can use non-volatile memory, such as flash memory.

[0060] Figure 3 This is a schematic diagram of the UE communication process, including the following steps:

[0061] Step 301: The UE completes cell selection and enters Radio Resource Control (RRC) idle state (RRC_IDLE).

[0062] Step 302: The UE initiates a random access connection establishment, and the state is RRC connected state (RRC_CONNECTED), completing the security activation.

[0063] Step 303: The base station queries the UE's capabilities, and the UE completes capability reporting.

[0064] Step 303 may include steps 303a to 303b.

[0065] Step 303a: The base station performs a capability query on the UE, for example, by sending an air interface message UECapabilityEnquiry to the UE to request a query on the UE's capabilities.

[0066] Step 303b: The UE reports its capabilities to the base station, for example, by sending an air interface message UECapabilityInformation to the base station to report its capabilities.

[0067] Step 304: The base station allocates the specified resources to the UE according to the UE's capabilities.

[0068] The resources allocated to the UE include time-domain resources, frequency-domain resources, and one or more of the configured primary or secondary cells. The resources allocated to the UE are less than or equal to the UE's capabilities.

[0069] Step 304 may include steps 304a to 304b.

[0070] Step 304a: The base station allocates resources to the UE, for example, by sending an air interface message RRCReconfiguration to the UE to request RRC reconfiguration of the UE.

[0071] Step 304b: The UE indicates to the base station that the resource configuration is complete. For example, the UE sends an air interface message RRCReconfigurationComplete to the base station to indicate that the RRC reconfiguration is complete.

[0072] Based on the above process, resources can be configured for the UE, enabling the UE to communicate.

[0073] Figure 4 This is a schematic diagram of the RRC state transition process. After a UE enters the RRC_CONNECTED state, it can release the connection suspension from the RRC_CONNECTED state and enter the RRC_INACTIVE state, or it can resume the connection from the RRC_INACTIVE state and enter the RRC_CONNECTED state. When the connection is restored, the base station allocates network resources through the air interface message RRCResume, and the UE notifies the base station of the completion of network resource allocation through the air interface message RRCResumeComplete. The UE can also release the connection from the RRC_INACTIVE state and enter the RRC_IDLE state, release the connection from the RRC_CONNECTED state and enter the RRC_IDLE state, or it can resume the connection from the RRC_IDLE state and enter the RRC_CONNECTED state.

[0074] The following describes UE capabilities. UE capabilities refer to the entire UE level and indicate the highest capability specifications that the UE can support. Currently, a UE can insert two or more SIM cards, therefore the UE needs to report the UE capabilities corresponding to each SIM card separately. In the embodiments of this application, the SIM card (such as the first SIM card and the second SIM card) can be an embedded SIM (eSIM) card, an integrated SIM (iSIM) card, a physical SIM card, etc., and this application embodiment does not limit the specific type of SIM card.

[0075] For ease of explanation, this embodiment uses the example of a UE being able to insert two SIM cards simultaneously. UE capabilities include, but are not limited to, one or more of the following 1) to 7):

[0076] 1) Maximum number of cells supported for carrier aggregation (CA)

[0077] For example, CA-BandwidthClassNR can be used to represent the maximum number of cells that a UE can support for carrier aggregation. The maximum number of cells that a UE can support for carrier aggregation can be 1, 2, 3, 4, 5, or 8.

[0078] 2) Maximum number of supported Multiple Input Multiple Output (MIMO) layers

[0079] The maximum number of supported MIMO layers includes, for example:

[0080] a) Maximum number of MIMO layers supported in the downlink

[0081] For example, maxNumberMIMO-LayersPDSCH can be used to represent the maximum number of MIMO layers supported in the downlink, and the value can be 2, 4, 8, etc.

[0082] b) Maximum number of MIMO layers supported by codebook-based uplink

[0083] For example, maxNumberMIMO-LayersCB-PUSCH represents the maximum number of MIMO layers supported in the codebook mode uplink, and the value can be 1, 2, or 4.

[0084] c) Maximum number of MIMO layers supported in non-codebook uplink mode

[0085] For example, maxNumberMIMO-LayersNonCB-PUSCH represents the maximum number of MIMO layers supported in the uplink of the non-codebook mode, and the value can be 1, 2, or 4.

[0086] 3) Supplementary Uplink (SUL) feature

[0087] At nearby locations, the UE can use Normal Uplink (NUL), while at distant locations, the UE can use SUL. SUL frequencies are generally lower than NUL frequencies, and SUL coverage is greater than NUL coverage. Once the base station has configured both NUL and SUL for the UE, the UE can choose to use only NUL, only SUL, or both during scheduling. Using SUL can increase coverage and improve uplink transmission rate.

[0088] SUL characteristics include, but are not limited to:

[0089] a) Can SUL send and receive simultaneously?

[0090] b) Does it support SUL dynamic switching?

[0091] c) Whether it supports using SUL for transmitting Sounding Reference Signal (SRS) and NUL for transmitting uplink data, or using SUL for transmitting uplink data and NUL for transmitting SRS.

[0092] 4) Wireless access capability

[0093] The wireless access capability may or may not support dual connectivity (DC). Dual connectivity may be ENDC or NEDC. ENDC is short for EUTRA NR Dual Connectivity, NEDC is short for NREUTRA Dual Connectivity, EUTRA is short for Evolved-UMTS Terrestrial Radio Access, and UMTS is short for Universal Mobile Telecommunications System.

[0094] If the UE supports ENDC, then the UE capabilities reported by the UE will include ENDC.

[0095] If the UE supports NEDC, then the UE capabilities reported by the UE will include NEDC.

[0096] If the UE does not support ENDC, then the UE capabilities reported by the UE will not include ENDC.

[0097] If the UE does not support NEDC, then the UE capabilities reported by the UE will not include NEDC.

[0098] 5) The maximum channel bandwidth supported by the UE on a frequency band combination.

[0099] 6) The modulation levels supported by the UE on a frequency band combination.

[0100] The modulation level is also called modulation information, such as 64 Quadrature Amplitude Modulation (QAM), 16QAM, 256QAM, etc.

[0101] 7) Frequency band combinations or frequency bands supported by the UE.

[0102] 8) UE supported standards

[0103] For example, the UE supports 5G, fourth generation (4G) or third generation (3G) standards.

[0104] From the UE's perspective, sending signaling or data from the base station is called uplink transmission, and receiving signaling or data from the base station is called downlink reception. The UE's uplink and downlink capabilities can be the same or different.

[0105] In scenarios where multiple SIM cards are executed concurrently, how can we further improve the overall performance of multi-SIM UEs? The following is a further explanation of the embodiments of this application with specific examples.

[0106] Figure 5 This is a schematic diagram of a communication process for a UE to support concurrent dual-SIM services. The method is executed by the UE or a module on the UE. Taking the UE executing this method as an example, the method includes the following steps:

[0107] Step 501: The UE sends first capability information to the first base station. The first capability information indicates the first UE capability corresponding to the first SIM card.

[0108] Step 502: The UE sends second capability information to the second base station. The second capability information indicates the second UE capability corresponding to the second SIM card.

[0109] For example, the UE can follow Figure 3 The method in one embodiment involves sending first capability information to a first base station and second capability information to a second base station. For example, after the first SIM card and the second SIM card are powered on and registered, the UE completes the reporting of the first UE capability corresponding to the first SIM card and the second UE capability corresponding to the second SIM card. Then, the UE can initiate dual-SIM service and perform concurrent dual-SIM service.

[0110] The first base station and the second base station can be the same or different. The capabilities of both the first and second UEs are less than the UE's overall capability specification. The UE's capability specification is shared by the first and second SIM cards, and the sum of the capabilities of the first and second UEs is greater than or equal to the UE's overall capability specification. The UE's overall capability specification is also referred to as the UE's total capability.

[0111] In one implementation method, if the first SIM card is the primary card and the second SIM card is the secondary card, then the capability of the first UE can be greater than that of the second UE.

[0112] Through steps 501 and 502 above, the UE reports the first UE capabilities corresponding to the first SIM card to the first base station, and reports the second UE capabilities corresponding to the second SIM card to the second base station.

[0113] Step 503: When the UE capability corresponding to the first SIM card is updated from the first UE capability to the third UE capability, the UE sends the third capability information to the first base station. The third capability information indicates the third UE capability corresponding to the first SIM card.

[0114] That is, when the UE capability corresponding to the first SIM card changes, the UE reports the latest UE capability corresponding to the first SIM card, i.e., the third UE capability, to the first base station.

[0115] In step 504, in response to the update of the UE capability corresponding to the first SIM card, the UE sends fourth capability information to the second base station. The fourth capability information indicates the fourth UE capability corresponding to the second SIM card.

[0116] Among them, the capabilities of the third UE and the fourth UE are both less than the capability specifications of the UE, and the sum of the capabilities of the third UE and the fourth UE is greater than or equal to the capability specifications of the UE.

[0117] When the capabilities of the UE's first SIM card change, it will also trigger a change in the UE's second SIM card. The relationship between the capabilities of the first, second, third, and fourth UEs is as follows:

[0118] 1) If the capability of the third UE is less than that of the first UE, then the capability of the fourth UE is greater than that of the second UE. That is, if the capability of the UE corresponding to the first SIM card decreases, then the capability of the UE corresponding to the second SIM card increases.

[0119] 2) When the capability of the third UE is greater than that of the first UE, the capability of the fourth UE is less than that of the second UE. That is, when the capability of the UE corresponding to the first SIM card increases, the capability of the UE corresponding to the second SIM card decreases.

[0120] The variation range of the UE capabilities corresponding to the first SIM card can be the same as or different from the variation range of the UE capabilities corresponding to the second SIM card. Therefore, the sum of the third and fourth UE capabilities can be equal to or unequal to the sum of the first and second UE capabilities. In one implementation method, it can be predetermined that the sum of the third and fourth UE capabilities is not equal to the sum of the first and second UE capabilities. Then, when determining the fourth UE capability, the UE needs to satisfy the following condition: the sum of the third and fourth UE capabilities is not equal to the sum of the first and second UE capabilities.

[0121] Through steps 503 and 504 above, after the UE capability corresponding to the first SIM card is updated, the UE re-reports the third UE capability corresponding to the first SIM card to the first base station, and the UE capability corresponding to the second SIM card is also updated. The UE also re-reports the fourth UE capability corresponding to the second SIM card to the second base station.

[0122] In one implementation method, when the UE capability corresponding to the first SIM card is updated from a first UE capability to a third UE capability, the UE sends a first indication message to the first base station. This first indication message triggers the first base station to query the UE capability corresponding to the first SIM card, or indicates that the UE capability corresponding to the first SIM card has changed. After receiving the first indication message, the first base station sends a first capability query request to the UE. This first capability query request is used to request a query of the UE capability corresponding to the first SIM card, and the UE sends the aforementioned third capability information to the first base station according to the first capability query request. In one implementation method, the aforementioned first indication message can be a re-registration message or a standard switching message, etc. For example, when the UE sends a re-registration message corresponding to the first SIM card to the first base station, it triggers the first base station to send a first capability query message to the UE. As another example, when the standard of the UE's first SIM card is switched from a first standard to a second standard, the UE sends a standard switching message corresponding to the first SIM card to the first base station, triggering the first base station to send a first capability query message to the UE. The switching of the UE's first SIM card from a first standard to a second standard can occur in various scenarios, such as changes in network quality leading to standard switching, cell handover leading to standard switching, or other scenarios, which are not limited in this application. In another implementation method, the first indication information can be bit information or signaling. The first indication information can be carried in a mobility registration message or a tracking area update (TAU) message and sent to the first base station. The first indication information triggers the first base station to send a first capability query message to the UE.

[0123] In one implementation method, when the UE capability corresponding to the second SIM card is updated from the second UE capability to the fourth UE capability, the UE sends a second indication message to the second base station. This second indication message triggers the second base station to query the UE capability corresponding to the second SIM card, or indicates that the UE capability corresponding to the second SIM card has changed. After receiving the second indication message, the second base station sends a second capability query request to the UE. This second capability query request is used to request a query of the UE capability corresponding to the second SIM card, and the UE sends the aforementioned fourth capability information to the second base station according to the second capability query request. In one implementation method, the aforementioned second indication message can be a re-registration message or a standard switching message, etc. For example, when the UE sends a re-registration message corresponding to the second SIM card to the second base station, it triggers the second base station to send a second capability query message to the UE. As another example, when the standard of the UE's second SIM card is switched from a third standard to a fourth standard, the UE sends a standard switching message corresponding to the second SIM card to the second base station, triggering the second base station to send a second capability query message to the UE. The switching of the UE's second SIM card from a third standard to a fourth standard can occur in various scenarios, such as changes in network quality leading to standard switching, cell handover leading to standard switching, or other scenarios, which are not limited in this application. In another implementation method, the second indication information can be bit information or signaling. The second indication information can be carried in a mobility registration message or a TAU message and sent to the second base station. The second indication information triggers the second base station to send a second capability query message to the UE.

[0124] In one possible implementation, for example, at least one of the first terminal capability, the second terminal capability, the third terminal capability, and the fourth terminal capability satisfies one or more of the following:

[0125] It supports the largest number of cells for carrier aggregation;

[0126] It supports the most MIMO layers;

[0127] Supports supplementary uplink features;

[0128] Supports wireless access capabilities;

[0129] The maximum channel bandwidth supported on a frequency band combination is the largest.

[0130] The highest modulation level is supported on a frequency band combination;

[0131] The maximum number of supported frequency band combinations / band ranges; or,

[0132] It supports the highest level of communication standards.

[0133] For example, the first terminal capability supports the largest number of cells for carrier aggregation. For instance, if the first terminal capability supports a1 cells for carrier aggregation, the second terminal capability supports b1 cells for carrier aggregation, the third terminal capability supports c1 cells for carrier aggregation, and the fourth terminal capability supports d1 cells for carrier aggregation, then a1 is the maximum value among a1, b1, c1, and d1.

[0134] For example, the second terminal capability supports the most MIMO layers. For instance, the first terminal capability supports a2 MIMO layers, the second terminal capability supports b2 MIMO layers, the third terminal capability supports c2 MIMO layers, and the fourth terminal capability supports d2 MIMO layers. In this case, b2 is the maximum value among a2, b2, c2, and d2.

[0135] For example, the first terminal capability and the fourth terminal capability support supplementary uplink features, while the second terminal capability and the third terminal capability do not support supplementary uplink features.

[0136] In one implementation method, when the capability of the third UE is less than that of the first UE and the capability of the fourth UE is greater than that of the second UE, the relationship between the capability of the first UE and the capability of the third UE includes one or more of the following 1) to 8):

[0137] 1) The maximum number of cells that can support carrier aggregation in the first UE capability is greater than the maximum number of cells that can support carrier aggregation in the third UE capability.

[0138] 2) The maximum number of MIMO layers supported in the first UE capability is greater than the maximum number of MIMO layers supported in the third UE capability.

[0139] 3) The first UE capability includes support for supplemental uplink features, while the third UE capability does not include support for supplemental uplink features.

[0140] 4) The radio access capability in the first UE capability includes support for dual connectivity, while the radio access capability in the third UE capability does not include support for dual connectivity.

[0141] 5) The maximum channel bandwidth supported by the first UE capability on a frequency band of a frequency band combination is greater than the maximum channel bandwidth supported by the third UE capability on a frequency band of a frequency band combination.

[0142] 6) The modulation level supported by the first UE capability on a frequency band of a frequency band combination is higher than the modulation level supported by the third UE capability on a frequency band of a frequency band combination.

[0143] 7) The frequency band combination / band supported in the first UE capability is greater than the frequency band combination / band supported in the third UE capability.

[0144] 8) The communication standard in the first UE capability is higher than the communication standard in the third UE capability.

[0145] Furthermore, the relationship between the second UE capability and the fourth UE capability includes one or more of the following 1) to 8):

[0146] 1) The maximum number of cells that can support carrier aggregation in the second UE capability is lower than the maximum number of cells that can support carrier aggregation in the fourth UE capability.

[0147] 2) The maximum number of MIMO layers supported in the second UE capability is less than the maximum number of MIMO layers supported in the fourth UE capability.

[0148] 3) The second UE capability does not include support for supplemental uplink features, while the fourth UE capability includes support for supplemental uplink features;

[0149] 4) The radio access capability in the second UE capability does not include support for dual connectivity, while the radio access capability in the fourth UE capability includes support for dual connectivity.

[0150] 5) The maximum channel bandwidth supported by the second UE capability on a frequency band of a frequency band combination is less than the maximum channel bandwidth supported by the fourth UE capability on a frequency band of a frequency band combination.

[0151] 6) The modulation levels supported in the second UE capability on a frequency band of a frequency band combination are lower than the modulation levels supported in the fourth UE capability on a frequency band of a frequency band combination.

[0152] 7) The frequency band combinations / bands supported in the second UE capability are fewer than those supported in the fourth UE capability;

[0153] 8) The communication standard in the second UE capability is lower than the communication standard in the fourth UE capability.

[0154] In another implementation method, when the capability of the third UE is greater than that of the first UE and the capability of the fourth UE is less than that of the second UE, the relationship between the capability of the first UE and the capability of the third UE includes one or more of the following 1) to 8):

[0155] 1) The maximum number of cells that can support carrier aggregation in the first UE capability is less than the maximum number of cells that can support carrier aggregation in the third UE capability.

[0156] 2) The maximum number of MIMO layers supported in the first UE capability is less than the maximum number of MIMO layers supported in the third UE capability.

[0157] 3) The first UE capability does not include support for supplemental uplink features, while the third UE capability includes support for supplemental uplink features.

[0158] 4) The radio access capability in the first UE capability does not include support for dual connectivity, while the radio access capability in the third UE capability includes support for dual connectivity.

[0159] 5) The maximum channel bandwidth supported by the first UE capability on a frequency band of a frequency band combination is less than the maximum channel bandwidth supported by the third UE capability on a frequency band of a frequency band combination.

[0160] 6) The modulation level supported by the first UE capability on a frequency band of a frequency band combination is lower than the modulation level supported by the third UE capability on a frequency band of a frequency band combination.

[0161] 7) The number of frequency band combinations / bands supported in the first UE capability is less than the number of frequency band combinations / bands supported in the third UE capability.

[0162] 8) The communication standard in the first UE capability is lower than the communication standard in the third UE capability.

[0163] Furthermore, the relationship between the second UE capability and the fourth UE capability includes one or more of the following 1) to 8):

[0164] 1) The maximum number of cells that can support carrier aggregation in the second UE capability is higher than the maximum number of cells that can support carrier aggregation in the fourth UE capability.

[0165] 2) The maximum number of MIMO layers supported in the second UE capability is greater than the maximum number of MIMO layers supported in the fourth UE capability.

[0166] 3) The second UE capability includes support for supplemental uplink features, while the fourth UE capability does not include support for supplemental uplink features.

[0167] 4) The radio access capability in the second UE capability includes support for dual connectivity, while the radio access capability in the fourth UE capability does not include support for dual connectivity.

[0168] 5) The maximum channel bandwidth supported by the second UE capability on a frequency band of a frequency band combination is greater than the maximum channel bandwidth supported by the fourth UE capability on a frequency band of a frequency band combination.

[0169] 6) The modulation levels supported in the second UE capability on a frequency band of a frequency band combination are higher than the modulation levels supported in the fourth UE capability on a frequency band combination.

[0170] 7) The frequency band combinations / bands supported in the second UE capability are greater than the frequency band combinations / bands supported in the fourth UE capability.

[0171] 8) The communication standard in the second UE capability is higher than the communication standard in the fourth UE capability.

[0172] The above solution allows for dynamic allocation of dual-SIM capabilities in a terminal while supporting concurrent services. A decrease in the terminal capability corresponding to one SIM card can lead to an increase in the terminal capability corresponding to the other SIM card, or vice versa. This maximizes the use of dual-SIM resources and helps improve the overall performance of multi-SIM terminal devices.

[0173] It is understood that, in order to achieve the functions in the above embodiments, the terminal includes hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should readily recognize that, based on the units and method steps described in conjunction with the embodiments disclosed in this application, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed by hardware or by computer software driving hardware depends on the specific application scenario and design constraints of the technical solution.

[0174] Figure 6 and Figure 7 The diagram illustrates the possible structures of communication devices provided in embodiments of this application. These communication devices can be used to implement the functions of the terminal in the above method embodiments, and thus also achieve the beneficial effects of the above method embodiments. In the embodiments of this application, the communication device can be a terminal or a module (such as a chip) applied to the terminal.

[0175] Figure 6 The communication device 600 shown includes a processing unit 610 and a transceiver unit 620. The communication device 600 is used to implement the above-described... Figure 5 The terminal functionality shown in the method embodiment.

[0176] When the communication device 600 is used to implement Figure 5In the method embodiment shown, the terminal functions as follows: The processing unit 610 controls the transceiver unit 620 to: send first capability information to a first access network device, the first capability information indicating a first terminal capability corresponding to a first user identification module SIM card; send second capability information to a second access network device, the second capability information indicating a second terminal capability corresponding to a second SIM card; when the terminal capability corresponding to the first SIM card is updated from the first terminal capability to a third terminal capability, send third capability information to the first access network device, the third capability information indicating the third terminal capability corresponding to the first SIM card; and in response to the update of the terminal capability corresponding to the first SIM card, send a fourth capability information to the second access network device. The capability information, the fourth capability information, indicates the fourth terminal capability corresponding to the second SIM card; wherein, the first terminal capability, the second terminal capability, the third terminal capability, and the fourth terminal capability are all less than the capability specification of the terminal, the capability specification of the terminal is shared by the first SIM card and the second SIM card, and the sum of the first terminal capability and the second terminal capability is greater than or equal to the capability specification of the terminal, and the sum of the third terminal capability and the fourth terminal capability is greater than or equal to the capability specification of the terminal; when the third terminal capability is less than the first terminal capability, then the fourth terminal capability is greater than the second terminal capability; or, when the third terminal capability is greater than the first terminal capability, then the fourth terminal capability is less than the second terminal capability.

[0177] In one possible implementation, the processing unit 610 is used to control the transceiver unit 620 to: send first indication information to the first access network device before sending third capability information to the first access network device, the first indication information triggering a query of the terminal capability corresponding to the first SIM card; and receive a first capability query request from the first access network device, the first capability query request being used to request a query of the terminal capability corresponding to the first SIM card.

[0178] In one possible implementation, the processing unit 610 is used to control the transceiver unit 620 to: send second indication information to the second access network device before sending the fourth capability information to the second access network device, the second indication information triggering a query of the terminal capability corresponding to the second SIM card; and receive a second capability query request from the second access network device, the second capability query request being used to request a query of the terminal capability corresponding to the second SIM card.

[0179] In one possible implementation, the terminal's capability specifications include one or more of the following:

[0180] This terminal supports a maximum number of cells for carrier aggregation.

[0181] This terminal supports a maximum number of multiple input-output MIMO layers.

[0182] The terminal's supplementary uplink capabilities;

[0183] The terminal's wireless access capability;

[0184] The terminal supports the maximum channel bandwidth on a frequency band combination.

[0185] The terminal supports modulation levels on a frequency band combination;

[0186] The frequency band combinations / bands supported by this terminal; or,

[0187] The communication standards supported by this terminal.

[0188] In one possible implementation, at least one of the first terminal capability, the second terminal capability, the third terminal capability, and the fourth terminal capability satisfies one or more of the following:

[0189] It supports the largest number of cells for carrier aggregation;

[0190] It supports the most MIMO layers;

[0191] Supports supplementary uplink features;

[0192] Supports wireless access capabilities;

[0193] The maximum channel bandwidth supported on a frequency band combination is the largest.

[0194] The highest modulation level is supported on a frequency band combination;

[0195] The maximum number of supported frequency band combinations / band ranges; or,

[0196] It supports the highest level of communication standards.

[0197] For a more detailed description of the processing unit 610 and the transceiver unit 620 mentioned above, please refer to [link / reference]. Figure 5 The relevant descriptions in the method embodiments shown are not repeated here.

[0198] Figure 7 The communication device 700 shown includes a processor 710 and an interface circuit 720. The processor 710 and the interface circuit 720 are coupled to each other. It is understood that the interface circuit 720 can be a transceiver or an input / output interface. Optionally, the communication device 700 may also include a memory 730 for storing instructions executed by the processor 710, or storing input data required by the processor 710 to execute instructions, or storing data generated after the processor 710 executes instructions.

[0199] When the communication device 700 is used to achieve Figure 5In the method shown, the processor 710 is used to implement the functions of the processing unit 610, and the interface circuit 720 is used to implement the functions of the transceiver unit 620.

[0200] When the aforementioned communication device is a chip applied to a terminal, the terminal chip implements the functions of the terminal in the above method embodiments. The terminal chip receives information from other modules (such as radio frequency modules or antennas) in the terminal, which is information sent to the terminal by the base station; or, the terminal chip sends information to other modules (such as radio frequency modules or antennas) in the terminal, which is information sent to the base station by the terminal.

[0201] It is understood that the processor in the embodiments of this application may be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. A general-purpose processor may be a microprocessor or any conventional processor.

[0202] The method steps in the embodiments of this application can be implemented in hardware or by a processor executing software instructions. The software instructions can consist of corresponding software modules, which can be stored in random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory, registers, hard disks, portable hard disks, compact disc read-only memory (CD-ROM), or any other form of storage medium known in the art. An exemplary storage medium is coupled to a processor, enabling the processor to read information from and write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and storage medium can reside in an ASIC. Alternatively, the ASIC can reside in a base station or terminal. Of course, the processor and storage medium can also exist as discrete components in the base station or terminal.

[0203] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of this application are performed entirely or partially. The computer can be a general-purpose computer, a special-purpose computer, a computer network, a base station, a user equipment, or other programmable device. The computer program or instructions can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another. For example, the computer program or instructions can be transferred from one website, computer, server, or data center to another website, computer, server, or data center via wired or wireless means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium, such as a floppy disk, hard disk, or magnetic tape; it can also be an optical medium, such as a digital video optical disc; or it can be a semiconductor medium, such as a solid-state drive. The computer-readable storage medium may be a volatile or non-volatile storage medium, or may include both types of storage media.

[0204] In the various embodiments of this application, unless otherwise specified or in case of logical conflict, the terminology and / or descriptions of different embodiments are consistent and can be referenced by each other. The technical features of different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0205] In this application, "at least one" means one or more, and "more than one" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. In the textual description of this application, the character " / " generally indicates an "or" relationship between the preceding and following related objects; in the formulas of this application, the character " / " indicates a "division" relationship between the preceding and following related objects.

[0206] It is understood that the various numerical designations used in the embodiments of this application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of this application. The order of the process numbers described above does not imply the order of execution; the execution order of each process should be determined by its function and internal logic.

Claims

1. A communication method for a dual-SIM dual-pass DSDA terminal, characterized in that, include: Send first capability information to the first access network device, wherein the first capability information indicates the first terminal capability corresponding to the first user identification module SIM card; Send second capability information to the second access network device, wherein the second capability information indicates the second terminal capability corresponding to the second SIM card; When the terminal capability corresponding to the first SIM card is updated from the first terminal capability to the third terminal capability, the third capability information is sent to the first access network device, and the third capability information indicates the third terminal capability corresponding to the first SIM card. In response to an update of the terminal capabilities corresponding to the first SIM card, a fourth capability information is sent to the second access network device, the fourth capability information indicating the fourth terminal capability corresponding to the second SIM card; Wherein, the capabilities of the first terminal, the second terminal, the third terminal, and the fourth terminal are all less than the capability specification of the terminal. The capability specification of the terminal is shared by the first SIM card and the second SIM card to ensure that the services of the first SIM card and the second SIM card are carried out simultaneously. The sum of the capabilities of the first terminal and the second terminal is greater than or equal to the capability specification of the terminal, and the sum of the capabilities of the third terminal and the fourth terminal is greater than or equal to the capability specification of the terminal. If the capability of the third terminal is less than the capability of the first terminal, then the capability of the fourth terminal is greater than the capability of the second terminal; or, if the capability of the third terminal is greater than the capability of the first terminal, then the capability of the fourth terminal is less than the capability of the second terminal.

2. The method as described in claim 1, characterized in that, Before sending the third capability information to the first access network device, the method further includes: Send a first indication message to the first access network device, the first indication message triggering a query of the terminal capabilities corresponding to the first SIM card; A first capability query request is received from the first access network device. The first capability query request is used to query the terminal capabilities corresponding to the first SIM card.

3. The method as described in claim 1 or 2, characterized in that, Before sending the fourth capability information to the second access network device, the method further includes: Send a second indication message to the second access network device, the second indication message triggering a query of the terminal capabilities corresponding to the second SIM card; A second capability query request is received from the second access network device. The second capability query request is used to query the terminal capabilities corresponding to the second SIM card.

4. The method according to any one of claims 1 to 3, characterized in that, The terminal's capability specifications include one or more of the following: The terminal supports a maximum number of cells for carrier aggregation. The terminal supports a maximum number of multiple input-output MIMO layers. The terminal's supplementary uplink characteristics; The terminal's wireless access capability; The terminal supports the maximum channel bandwidth on a frequency band in a frequency band combination; The modulation levels supported by the terminal on a frequency band in a frequency band combination; The frequency band combinations / bands supported by the terminal; or... The terminal supports the following communication standards.

5. The method according to any one of claims 1 to 3, characterized in that, At least one of the first terminal capability, the second terminal capability, the third terminal capability, and the fourth terminal capability satisfies one or more of the following: It supports the largest number of cells for carrier aggregation; It supports the most MIMO layers; Supports supplementary uplink features; Supports wireless access capabilities; The maximum channel bandwidth supported on a frequency band combination is the maximum. The highest modulation level is supported on a frequency band combination; The maximum number of supported frequency band combinations / band ranges; or, It supports the highest level of communication standards.

6. A communication device for dual-SIM dual-pass DSDA, characterized in that, Includes processing units and transceiver units; The processing unit is used to control the transceiver unit: Send first capability information to the first access network device, wherein the first capability information indicates the first terminal capability corresponding to the first user identification module SIM card; Send second capability information to the second access network device, wherein the second capability information indicates the second terminal capability corresponding to the second SIM card; When the terminal capability corresponding to the first SIM card is updated from the first terminal capability to the third terminal capability, the third capability information is sent to the first access network device, and the third capability information indicates the third terminal capability corresponding to the first SIM card. In response to an update of the terminal capabilities corresponding to the first SIM card, a fourth capability information is sent to the second access network device, the fourth capability information indicating the fourth terminal capability corresponding to the second SIM card; Wherein, the capabilities of the first terminal, the second terminal, the third terminal, and the fourth terminal are all less than the capability specification of the terminal. The capability specification of the terminal is shared by the first SIM card and the second SIM card to ensure that the services of the first SIM card and the second SIM card are carried out simultaneously. The sum of the capabilities of the first terminal and the second terminal is greater than or equal to the capability specification of the terminal, and the sum of the capabilities of the third terminal and the fourth terminal is greater than or equal to the capability specification of the terminal. If the capability of the third terminal is less than the capability of the first terminal, then the capability of the fourth terminal is greater than the capability of the second terminal; or, if the capability of the third terminal is greater than the capability of the first terminal, then the capability of the fourth terminal is less than the capability of the second terminal.

7. The apparatus as claimed in claim 6, characterized in that, The processing unit is used to control the transceiver unit: Before sending the third capability information to the first access network device, a first indication information is sent to the first access network device, and the first indication information triggers a query of the terminal capability corresponding to the first SIM card. A first capability query request is received from the first access network device. The first capability query request is used to query the terminal capabilities corresponding to the first SIM card.

8. The apparatus as claimed in claim 6 or 7, characterized in that, The processing unit is used to control the transceiver unit: Before sending the fourth capability information to the second access network device, a second indication information is sent to the second access network device, and the second indication information triggers a query of the terminal capability corresponding to the second SIM card; A second capability query request is received from the second access network device. The second capability query request is used to query the terminal capabilities corresponding to the second SIM card.

9. The apparatus as claimed in any one of claims 6 to 8, characterized in that, The terminal's capability specifications include one or more of the following: The terminal supports a maximum number of cells for carrier aggregation. The terminal supports a maximum number of multiple input-output MIMO layers. The terminal's supplementary uplink characteristics; The terminal's wireless access capability; The terminal supports the maximum channel bandwidth on a frequency band in a frequency band combination; The modulation levels supported by the terminal on a frequency band in a frequency band combination; The frequency band combinations / bands supported by the terminal; or... The terminal supports the following communication standards.

10. The apparatus according to any one of claims 6 to 8, characterized in that, At least one of the first terminal capability, the second terminal capability, the third terminal capability, and the fourth terminal capability satisfies one or more of the following: It supports the largest number of cells for carrier aggregation; It supports the most MIMO layers; Supports supplementary uplink features; Supports wireless access capabilities; The maximum channel bandwidth supported on a frequency band combination is the maximum. The highest modulation level is supported on a frequency band combination; The maximum number of supported frequency band combinations / band ranges; or, It supports the highest level of communication standards.

11. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores instructions that, when executed on a computer, implement the method as described in any one of claims 1 to 5.

12. A communication device, characterized in that, include: A processor and a memory, wherein the memory is used to store program instructions, and the processor is used to execute the program instructions in the memory to implement the method as described in any one of claims 1 to 5.

13. A communication device, characterized in that, include: The processing circuit and the interface circuit; wherein the interface circuit is used to couple with a memory external to the wireless communication device and to provide a communication interface for the processing circuit to access the memory; The processing circuit is used to execute program instructions in the memory to implement the method as described in any one of claims 1 to 5.

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