Communication method

Abstract

The embodiment of the invention provides a communication method, and relates to the technical field of communication. The electronic device is prevented from entering the RRC connection reestablishment process, so that the UE can complete the RRC connection reconfiguration process. A first radio resource control (RRC) connection is established between the terminal and a first access network device. The method includes receiving a first configuration message, the first configuration message including a fifth CA combination. The first configuration message is used for configuring the fifth CA combination for the terminal; and under the condition that the fifth CA combination is not supported by the terminal, sending a first configuration completion message.

Description

[0001] This application is a divisional application. The application number of the original application is 202311328000.X, and the original application date is October 13, 2023. The entire contents of the original application are incorporated into this application by reference. Technical Field

[0002] The embodiments of the present application relate to the field of communication technology, and in particular, to a communication method. Background Art

[0003] Currently, user equipment (UE) can establish an RRC connection with a nearby access network device by initiating a radio resource control (RRC) connection establishment process. If the UE supports and enables the carrier aggregation (CA) capability, based on the RRC connection, the UE and the access network device can configure CA through the RRC connection reconfiguration process.

[0004] For example, the access network device may send an RRC connection reconfiguration message to the UE, and the RRC connection reconfiguration message carries a CA configuration. The CA configuration may include at least one CA combination. Correspondingly, after receiving the RRC connection reconfiguration message, the UE performs a protocol check on the CA configuration carried in the RRC connection reconfiguration message.

[0005] In some implementations, the UE fails to verify the CA configuration protocol, which causes the RRC connection reconfiguration process to fail and enters the RRC connection reestablishment process, which results in interruption of UE communication and affects the user experience. Summary of the invention

[0006] An embodiment of the present application provides a communication method, which can prevent the UE from entering the RRC connection re-establishment process due to the failure of the protocol verification of the CA configuration, so that the UE can complete the RRC connection reconfiguration process.

[0007] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0008] In a first aspect, a communication method is provided, which is applied to a terminal, wherein the carrier aggregation CA combination supported by the terminal includes a first CA combination and a second CA combination. A first radio resource control RRC connection is established between the terminal and a first access network device. The method includes: receiving a first configuration message, wherein the first configuration message includes a third CA combination. The first configuration message is used to configure the third CA combination for the terminal. In the case where the third CA combination is not supported by the terminal, a first update request is sent. The first update request is used to trigger the first access network device to query the frequency bands and CA combinations supported by the terminal. A first query message is received. The first query message is used to query the frequency bands and CA combinations supported by the terminal. In response to the first query message, first capability information is sent. The first capability information does not include a fourth CA combination, and the fourth CA combination includes the first CA combination or the third CA combination.

[0009] In the present application, after receiving the first configuration message, the terminal may also perform a protocol check on the third CA combination. If the third CA combination is not supported by the terminal, the terminal fails to perform a protocol check on the third CA combination.

[0010] Based on the above scheme, when the third CA combination is not supported by the terminal, the terminal initiates a first update request to the first access network device, triggering the first access network device to query the frequency band and CA combination supported by the terminal. The terminal reports the supported frequency band and CA combination by sending the first capability information. Among them, the first capability information does not include the fourth CA combination, and the fourth CA combination includes the third CA combination not supported by the terminal or the first CA combination supported by the terminal. In other words, the first terminal capability information contains the CA combination supported by the terminal. In this way, according to the first capability information, the first access network device will not configure an unsupported CA combination for the terminal in the future, avoiding the terminal from entering the RRC connection re-establishment process, thereby allowing the terminal to maintain normal communication.

[0011] Optionally, the first configuration message includes a first RRC connection reconfiguration message. The first update request includes a first tracking area update request. The first query message includes a first terminal capability query message. The first capability information includes first terminal capability information.

[0012] Optionally, that the third CA combination is not supported by the terminal includes: the third CA combination includes a frequency band not supported by the terminal, or the third CA combination is included in CA combinations not supported by the terminal.

[0013] Optionally, the frequency bands supported by the terminal include the first frequency band and the second frequency band, and the frequency bands of the third CA combination include the second frequency band and the third frequency band. The terminal does not support the third frequency band. The first capability information also does not include the fourth frequency band. The fourth frequency band includes the first frequency band or the third frequency band. In other words, the first capability information includes the frequency bands and CA combinations supported by the terminal. In this way, according to the first capability information, the first access network device will not subsequently configure an unsupported CA combination for the terminal, thereby avoiding the UE's failure to verify the CA combination protocol, thereby avoiding communication interruption caused by entering the RRC connection re-establishment process.

[0014] Optionally, the first capability information includes the second CA combination. After sending the first capability information, the method further includes: receiving a second RRC connection reconfiguration message, the second RRC connection reconfiguration message including the second CA combination. Since the second CA combination is a CA combination supported by the terminal, the terminal subsequently successfully verifies the second CA combination protocol. In this way, the terminal can complete the RRC connection reconfiguration process, thereby allowing the terminal to maintain normal communication.

[0015] Optionally, after sending the first capability information, the method further includes: receiving a third RRC connection reconfiguration message, the third RRC connection reconfiguration message including the third CA combination. In response to the third RRC connection reconfiguration message, the protocol check on the third CA combination fails. Sending a second tracking area update request. The second tracking area update request is used to trigger the first access network device to query the frequency band and CA combination supported by the terminal. Receive a second terminal capability query message. The second terminal capability query message is used to indicate that the terminal reports the supported frequency band and CA combination. In response to the second terminal capability query message, sending second terminal capability information. The second terminal capability information does not include the second CA combination and the fourth CA combination.

[0016] Based on the above scheme, after the terminal fails to verify the protocol of the third CA combination carried in the third RRC connection reconfiguration message, the terminal initiates a second tracking area update request to the first access network device, triggering the first access network device to query the frequency band and CA combination supported by the terminal. The terminal reports the supported frequency band and CA combination by sending the second terminal capability information. Among them, the second terminal capability information does not include the second CA combination and the fourth CA combination. In other words, the second terminal capability information does not include the CA combination. In this way, according to the second terminal capability information, the first access network device will not configure the CA combination for the terminal in the future, thereby avoiding the terminal from performing a protocol check on the CA combination, and thus enabling the terminal to complete the RRC connection reconfiguration process and maintain normal communication.

[0017] Optionally, the frequency bands supported by the UE include a first frequency band and a second frequency band, and the frequency bands of the third CA combination include the second frequency band and the third frequency band. The terminal does not support the third frequency band. After sending the first capability information, the method also includes: receiving a fourth RRC connection reconfiguration message, the fourth RRC connection reconfiguration message includes the third CA combination. In response to the fourth RRC connection reconfiguration message, the protocol check on the third CA combination fails. Send a third tracking area update request. The third tracking area update request is used to trigger the first access network device to query the frequency bands and CA combinations supported by the terminal. Receive a third terminal capability query message. The third terminal capability query message is used to indicate that the terminal reports the supported frequency bands and CA combinations. In response to the third terminal capability query message, send third terminal capability information. The third terminal capability information does not include the fourth frequency band and the fourth CA combination. The fourth frequency band includes the first frequency band or the third frequency band.

[0018] Based on the above scheme, after the terminal fails to verify the protocol of the third CA combination carried in the fourth RRC connection reconfiguration message, the terminal initiates a third tracking area update request to the first access network device, triggering the first access network device to query the frequency band and CA combination supported by the terminal. The terminal reports the supported frequency band and CA combination by sending the third terminal capability information. Among them, the third terminal capability information does not include the fourth frequency band and the fourth CA combination. The fourth frequency band includes the first frequency band supported by the terminal or the third frequency band not supported by the terminal. In other words, the second terminal capability information includes the frequency band and CA combination supported by the terminal. In this way, according to the third terminal capability information, the first access network device will not subsequently configure an unsupported CA combination for the terminal, thereby avoiding the failure of the terminal to perform a protocol check on the CA combination, and then enabling the terminal to complete the RRC connection reconfiguration process and maintain normal communication.

[0019] Optionally, the third terminal capability information includes the second CA combination. After sending the third terminal capability information, the method further includes: receiving a fifth RRC connection reconfiguration message, the fifth RRC connection reconfiguration message including the second CA combination. Since the second CA combination is a CA combination supported by the terminal, the terminal subsequently verifies the second CA combination protocol successfully. In this way, the terminal can complete the RRC connection reconfiguration process, thereby allowing the terminal to maintain normal communication.

[0020] Optionally, after sending the third terminal capability information, the method further includes: receiving a sixth RRC connection reconfiguration message, the sixth RRC connection reconfiguration message including the third CA combination. In response to the sixth RRC connection reconfiguration message, the protocol check on the third CA combination fails. Sending a fourth tracking area update request. The fourth tracking area update request is used to trigger the first access network device to query the frequency bands and CA combinations supported by the terminal. Receive a fourth terminal capability query message. The fourth terminal capability query message is used to instruct the terminal to report supported frequency bands and CA combinations. In response to the fourth terminal capability query message, sending fourth terminal capability information. The fourth terminal capability information does not include the second CA combination and the fourth CA combination.

[0021] Based on the above scheme, after the terminal fails to verify the protocol of the third CA combination carried in the sixth RRC connection reconfiguration message, the terminal initiates a fourth tracking area update request to the first access network device, triggering the first access network device to query the frequency band and CA combination supported by the terminal. The terminal reports the supported frequency band and CA combination by sending the fourth terminal capability information. Among them, the fourth terminal capability information does not include the second CA combination and the fourth CA combination. In other words, the second terminal capability information does not include the CA combination. In this way, according to the fourth terminal capability information, the first access network device will not configure the CA combination for the terminal in the future, thereby avoiding the terminal from performing a protocol check on the CA combination, and thus enabling the terminal to complete the RRC connection reconfiguration process and maintain normal communication.

[0022] Optionally, the first capability information does not include the second CA combination. That is, the first capability information does not include the CA combination. In this way, according to the first capability information, the first access network device will not subsequently configure the CA combination for the terminal, thereby avoiding the terminal from performing a protocol check on the CA combination, thereby enabling the terminal to complete the RRC connection reconfiguration process and maintain normal communication.

[0023] Optionally, after sending the first capability information, the method further includes: receiving a first tracking area update accept message and sending a first tracking area update complete message.

[0024] Optionally, before receiving the first RRC connection reconfiguration message, the method further includes: sending a first attachment request. The first attachment request is used to trigger the first access network device to query the frequency band and CA combination supported by the terminal. Receive a fifth terminal capability query message. The fifth terminal capability query message is used to instruct the terminal to report supported frequency bands and CA combinations. In response to the fifth terminal capability query message, send fifth terminal capability information. The fifth terminal capability information includes the second frequency band, the fourth frequency band, the second CA combination, and the fourth CA combination.

[0025] Optionally, after sending the fifth terminal capability information, the method further includes: receiving a first attach accept message and sending a first attach complete message.

[0026] In a second aspect, a communication method is provided, the method being applied to a terminal, wherein a first radio resource control (RRC) connection is established between the terminal and a first access network device. The method comprises: receiving a first configuration message, wherein the first configuration message comprises a fifth CA combination. The first configuration message is used to configure the fifth CA combination for the terminal; and when the fifth CA combination is not supported by the terminal, sending a first configuration completion message.

[0027] Based on the above scheme, when the fifth CA combination is not supported by the terminal, a first RRC connection reconfiguration completion message is sent. The first RRC connection reconfiguration completion message can be used to indicate that the RRC connection reconfiguration process is successfully completed. In this way, the terminal is prevented from entering the RRC connection reestablishment process, so that the terminal maintains normal communication.

[0028] Optionally, the frequency band of the fifth CA combination includes a fifth frequency band and a sixth frequency band. The fifth CA combination is not supported by the terminal including: not supporting the fifth frequency band or the sixth frequency band. Or supporting the fifth frequency band and the sixth frequency band, and the fifth CA combination is included in the CA combinations not supported by the terminal.

[0029] Optionally, after sending the first configuration completion message, the method further includes: receiving a first activation instruction. The first activation instruction is used to instruct to activate the fifth CA combination. In response to the first activation instruction, the fifth CA combination is kept in an unactivated state. In this way, after receiving the first MAC control unit activation instruction, the terminal does not activate the fifth CA combination that fails the verification.

[0030] Optionally, the first configuration message includes a first RRC connection reconfiguration message. The first configuration completion message includes a first RRC connection reconfiguration completion message.

[0031] In a third aspect, a terminal is provided, the terminal comprising: a memory and one or more processors. The memory is coupled to the processor. The memory is used to store computer program code, the computer program code comprising computer instructions, and when the processor executes the computer instructions, the terminal executes the communication method provided in the first aspect and any possible design thereof or the communication method provided in the second aspect and any possible design thereof.

[0032] In a fourth aspect, a chip system is provided, the chip system comprising a processor and a communication interface. The processor is used to call and run a computer program stored in a storage medium from a storage medium, and execute a communication method as provided in the first aspect and any possible design thereof or a communication method as provided in the second aspect and any possible design thereof.

[0033] Optionally, the chip system corresponds to a modem in a terminal.

[0034] In a fifth aspect, a computer-readable storage medium is provided, which includes computer instructions. When the computer instructions are executed, a communication method provided in the first aspect and any one of its optional designs or a communication method provided in the second aspect and any one of its possible designs is executed.

[0035] In a sixth aspect, a computer program product is provided, the computer program comprising instructions, which, when executed by a computer, executes a communication method as provided in the first aspect and any one of its optional designs or a communication method as provided in the second aspect and any one of its possible designs.

[0036] It can be understood that the technical solutions provided in the third to sixth aspects above can respectively correspond to the interface display methods provided in the aforementioned designs, and the beneficial effects that can be obtained are similar and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic diagram of a communication method;

[0038] Figure 2 A schematic diagram of an interactive process of a communication method;

[0039] Figure 3 A schematic diagram of an interaction process for successful RRC connection reconfiguration;

[0040] Figure 4 A schematic diagram of an interaction process for RRC connection reconfiguration failure;

[0041] Figure 5 A schematic diagram of an interactive process of a communication method provided in an embodiment of the present application;

[0042] Figure 6 A schematic diagram of an interaction flow of another communication method provided in an embodiment of the present application;

[0043] Figure 7 A schematic diagram of an interaction flow of another communication method provided in an embodiment of the present application;

[0044] Figure 8 A schematic diagram of an interaction flow of another communication method provided in an embodiment of the present application;

[0045] Fig. 9 A schematic diagram of an interaction flow of another communication method provided in an embodiment of the present application;

[0046] Fig.10 A schematic diagram of an interaction flow of another communication method provided in an embodiment of the present application;

[0047] Fig.11 A schematic diagram of the composition of a chip module in a terminal provided in an embodiment of the present application;

[0048] Fig.12 A schematic diagram of the composition of a terminal provided in an embodiment of the present application;

[0049] Fig.13 A schematic diagram of the composition of a chip system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0050] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this embodiment, unless otherwise specified, "plurality" means two or more.

[0051] The technical solution provided in the embodiments of the present application can be applied to wireless communication networks such as advanced long term evolution advanced (LTE-A) systems, new radio (NR) networks of the fifth generation mobile communication technology (5G), and networks of the sixth generation mobile communication technology (6G). The terms "network" and "system" can be used interchangeably.

[0052] In the embodiments of the present application, the access network device may be a base station (BS), or the access network device may be a device that communicates with a user equipment (UE) or other communication sites, such as a relay site, and the access network device may provide communication coverage for a specific physical area. For example, the access network device may be an evolutionary Node B (eNB or eNodeB) in LTE-A; it may also be a next generation Node B (gNB) in 5G NR; or it may be other access network devices that provide access services in a wireless communication network, which is not limited by the present application.

[0053] Wireless communication networks such as LTE-A and NR can improve the transmission rate of the downlink (DL) and / or uplink (UL) in the network through carrier aggregation (CA). Among them, CA may include at least two carrier components. The at least two carrier components may include a main carrier and at least one auxiliary carrier. By aggregating the at least two carrier components (CC), the transmission bandwidth of the wireless communication network can be increased, thereby achieving an increase in the DL and / or UL transmission rate in the network.

[0054] Exemplary, reference Figure 1 Taking the UE as a mobile phone as an example, the UE can interact with a nearby base station A when it is turned on and a subscriber identity module (SIM) card is inserted. When the UE supports CA capability, the interaction process between the UE and the base station A includes a CA configuration process. Among them, the CA configuration process includes adding at least one secondary cell to the UE. The secondary cell is a cell working on the secondary carrier frequency band, which is used to provide additional wireless resources.

[0055] Based on LTE-A network and Figure 1 For example, refer to Figure 2 , by executing Figure 2 In the interaction shown, the UE and base station A may establish an RRC connection. After the RRC connection is established, base station A may also initiate a CA configuration process to the UE supporting the CA capability based on the RRC connection.

[0056] like Figure 2 As shown, the interaction process between the UE and the base station A may include:

[0057] S201. UE initiates a random access procedure to base station A.

[0058] Exemplarily, the UE may send a random access request to base station A via a random access channel (RACH). Correspondingly, under the instruction of base station A, the UE may access the target cell via the random access process, so that it may subsequently interact with base station A based on the target cell.

[0059] S202: UE initiates an RRC connection establishment process to base station A.

[0060] Exemplarily, the UE may initiate an RRC connection establishment process to the base station A based on the target cell accessed in S201.

[0061] For example, the UE sends an RRC connection establishment request to base station A based on the target cell. The RRC connection establishment request may be an RRCConnectionRequest.

[0062] Correspondingly, when entering Figure 2 After the RRC connection establishment process shown in S202, base station A will also respond.

[0063] For example, after receiving the RRC connection establishment request, base station A sends an RRC connection establishment message (such as RRCConnectionsetup) to the UE. In some implementations, the RRC connection establishment message 22 may carry information such as establishing a signaling radio bearer (SRB1).

[0064] Then, the UE may establish an RRC connection according to the RRC connection establishment message. For example, the UE may establish SRB1 according to the SRB1 information carried in the RRC connection establishment message. SRB1 is a transmission channel for RRC signaling messages.

[0065] After completing the RRC connection establishment, the UE feeds back an RRC connection establishment completion message to the base station A. For example, the RRC connection establishment completion message may be RRCConnectionComplete.

[0066] In the present application, after the RRC connection is established, the Attach process can also be triggered.

[0067] As a specific example, the attachment process includes the interactive operations from S203 to S207.

[0068] S203: UE sends an attach request 21 to base station A.

[0069] In this example, the UE may initiate an attach procedure to base station A via an attach request 21.

[0070] For example, the UE may send the attach request 21 to the base station A based on the RRC connection established in S202. The attach request 21 may be an AttachRequest.

[0071] In some embodiments of the present application, the attachment request 21 may also be referred to as a first attachment request.

[0072] S204. Base station A sends a UE capability query message 22 to the UE.

[0073] In the embodiment of the present application, after receiving the attach request 21, the base station A may initiate a UE capability query process to the UE. Specifically, the base station A may initiate the UE capability query process to the UE through a UE capability query message 22 (such as UECapabilityEnquiry).

[0074] In some other embodiments of the present application, the UE capability query message 22 may also be referred to as a fifth terminal capability query message.

[0075] S205. The UE returns UE capability information 23 to base station A.

[0076] Exemplarily, after receiving the UE capability query message 22, the UE feeds back UE capability information 23 (such as UECapabilityInformation) to the base station A. The UE capability information 23 includes the working frequency bands supported by the UE and the CA combinations supported.

[0077] In other embodiments of the present application, the UE capability information 23 may also be referred to as fifth terminal capability information.

[0078] Taking the working frequency bands supported by the UE including B1, B5 and B28, and the CA combination including CA_1_5 and CA_1_28 as an example, the UE can carry B1, B5, B28 and CA_1_5 and CA_1_28 in the UE capability information 23 and send it to the base station A. Among them, CA_1_5 corresponds to the carrier aggregation of B1 and B5, and CA_1_28 corresponds to the carrier aggregation of B1 and B28.

[0079] It should be noted that, on the UE side, B28 may include B28A or B28B.

[0080] In one implementation, the UE supports B28A in B28. Accordingly, the UE supports carrier aggregation of B1 and B28A.

[0081] In another implementation, the UE supports B28B in B28. Accordingly, the UE supports carrier aggregation of B1 and B28B.

[0082] The following examples all take the first implementation as an example.

[0083] S206. Base station A sends an attach accept message 24 to the UE.

[0084] In some embodiments of the present application, the attach accept message 24 may also be referred to as a first attach accept message.

[0085] S207. UE returns an attach completion message 25 to base station A.

[0086] Exemplarily, after completing the UE capability query, base station A sends an attach accept message 24 (eg, AttachAccept) to the UE.

[0087] Correspondingly, after receiving the attach accept message 24, the UE may feed back an attach complete message 25 (eg, AttachComplete) to the base station A.

[0088] In some embodiments of the present application, the attach completion message 25 may also be referred to as a first attach completion message.

[0089] It should be noted that in Figure 2 In the attachment process from S203 to S207 shown, for the messages sent by the UE and received by the base station A, such as S203, S205 and S207, the base station A will also directly transparently transmit them to the control node MME of the LTE-A network. Correspondingly, the messages returned by the base station A to the UE, such as S204 and S206, are first sent by the MME to the base station A, and then transparently transmitted by the base station A to the UE.

[0090] For example, taking the interaction in S203 and S204 as an example, the UE sends an attach request 21 to the base station A. In response to the attach request 21, the base station A transparently transmits the attach request 21 to the MME.

[0091] Correspondingly, after receiving the attach request 21, the MME returns a UE capability query message 22 to the base station A. In response to the UE capability query message 22, the base station A transparently transmits the UE capability query message 22 to the UE.

[0092] In some other embodiments, the attach process also includes UE identity verification and authorization processes, etc. For specific implementation, reference may be made to the relevant provisions on the attach process in 3GPP TS 24.301.

[0093] S208. Base station A initiates a CA configuration process to the UE.

[0094] Exemplarily, after the attachment process is completed, according to the working frequency bands and CA combinations supported by the UE in the UE capability information 23, based on the RRC connection established above, base station A can initiate a CA configuration process to the UE to configure the CA combination for the UE.

[0095] In the embodiment of the present application, base station A can configure a CA combination for the UE by initiating an RRC connection reconfiguration process to the UE. Figure 3 , is a schematic diagram of an interaction of an RRC connection reconfiguration process. Figure 3 A specific example of successful CA configuration in the RRC connection reconfiguration process is shown in FIG. Figure 3 As shown, the RRC connection reconfiguration process may include:

[0096] S301. Base station A sends an RRC connection reconfiguration message 31 to UE.

[0097] Exemplarily, the RRC connection reconfiguration message 31 may be RRCConnectionReconfiguration. Based on the capability information (working frequency bands and CA combinations supported by the UE) reported by the UE in S205, the base station A sends the RRC connection reconfiguration message 31 to the UE. The RRC connection reconfiguration message 31 carries CA configuration 1. The CA configuration 1 may include at least one CA combination.

[0098] For example, taking the capability information reported by the UE as UE capability information 23, CA configuration 1 may include CA combination 1. CA combination 1 includes carrier aggregation of B1 and B28A. Base station A may send an RRC connection reconfiguration message 31 carrying CA combination 1 to the UE.

[0099] S302. The UE performs protocol verification successfully according to the RRC connection reconfiguration message 31.

[0100] Exemplarily, after receiving the RRC connection reconfiguration message 31, the UE performs a protocol check on the CA configuration 1 carried in the RRC connection reconfiguration message 31. When the CA configuration 1 meets the UE capability, the UE succeeds in the protocol check on the CA configuration 1.

[0101] For example, the UE may perform a protocol check on CA combination 1 according to the RRC connection reconfiguration message 31. In this example, CA combination 1 includes carrier aggregation of B1+B28A, and CA combination 1 is a CA combination supported by the UE. Correspondingly, the UE succeeds in performing a protocol check on CA combination 1.

[0102] S303. UE sends an RRC connection reconfiguration completion message 32 to base station A.

[0103] Exemplarily, after successfully performing protocol verification on CA configuration 1, the UE sends an RRC connection reconfiguration complete message 32 indicating successful RRC connection reconfiguration to base station A. The RRC connection reconfiguration complete message 32 may include RRCReconfigurationComplete.

[0104] In this way, the current RRC connection reconfiguration process can be completed.

[0105] In such Figure 3 In the example, the example is taken as an example that the UE succeeds in the protocol verification according to the RRC connection reconfiguration message 31. In other implementations, the protocol verification performed by the UE according to the RRC connection reconfiguration message fails, and then the CA configuration of the UE fails. Figure 4 , is another interactive diagram of the RRC connection reconfiguration process. Figure 4 A specific example of CA configuration failure in the RRC connection reconfiguration process is shown in FIG. Figure 4 As shown, the RRC connection reconfiguration process may include:

[0106] S401. Base station A sends an RRC connection reconfiguration message 41 to UE.

[0107] The specific implementation of S401 can refer to Figure 3 S301 in the RRC connection reconfiguration message 41 may correspond to the RRC connection reconfiguration message 31.

[0108] In this example, the capability information reported by the UE is UE capability information 23. Based on the UE capability information 23, base station A sends an RRC connection reconfiguration message 41 to the UE. The RRC connection reconfiguration message 41 carries CA configuration 2. CA configuration 2 includes at least one CA combination.

[0109] In some implementations, CA configuration 2 may include CA combination 2, and CA combination 2 may include carrier aggregation of B1 and B28B. Base station A may send an RRC connection reconfiguration message 41 carrying CA combination 2 to the UE.

[0110] S402. The UE fails protocol verification according to the RRC connection reconfiguration message 41.

[0111] Exemplarily, after receiving the RRC connection reconfiguration message 41 , the UE performs a protocol check on the CA configuration 2 carried in the RRC connection reconfiguration message 41 .

[0112] For example, the UE may perform a protocol check on CA combination 2 according to the RRC connection reconfiguration message 41. In this example, CA combination 2 includes carrier aggregation of B1 and B28B. Among them, B28B is a frequency band not supported by the UE, and CA combination 2 corresponds to a CA combination not supported by the UE. In this case, the UE fails to perform a protocol check on CA combination 2 according to the RRC connection reconfiguration message 41.

[0113] When the UE determines that the protocol verification fails, the current RRC connection reconfiguration process ends.

[0114] S403: UE initiates an RRC connection re-establishment procedure to base station A.

[0115] Exemplarily, the RRC connection re-establishment process may be an RRC connection re-establishment process.

[0116] For example, the UE may send an RRC connection reestablishment request 42 (such as RRCReestablishmentRequest) to base station A. The cause value carried by the RRC connection reestablishment request 42 may include: reconfiguration failure.

[0117] Correspondingly, when entering Figure 4 After the RRC connection re-establishment process shown in S403, base station A will also respond.

[0118] For example, after receiving the RRC connection re-establishment request 42 with the cause value of "reconfiguration failure", base station A can search for the context information of the current PDU session.

[0119] If the current base station A is able to obtain the context information of the current PDU session, the base station A can send an RRC reestablishment response 43 (such as RRCReestablishment) to the UE. Then, the UE can perform RRC reestablishment according to the RRC reestablishment response 43, and feedback an RRC reestablishment completion message 44 (such as RRCReestablishmentComplete) to the base station A.

[0120] If the current base station A cannot obtain the context information of the current PDU session, the base station A can send an RRC establishment message 45 (such as RRCConnectionsetup) to the UE. Then, the UE can perform RRC establishment according to the establishment message 45 and feedback an RRC establishment completion message 46 (such as RRCSetupComplete) to the base station A.

[0121] For the specific implementation of the above RRC connection re-establishment process, reference may be made to the relevant provisions on RRC connection re-establishment in R16 of the 3GPP protocol, which will not be described in detail here.

[0122] It should be noted that the above examples are all described using B28 as an example. In other embodiments, the UE supports some frequencies in B41, such as B41A and B41A-related CA combinations. When the UE and the base station enter the RRC connection reconfiguration process, a protocol verification failure may also occur, thereby triggering the RRC connection reestablishment process.

[0123] It is understandable that after the RRC connection re-establishment process is completed, base station A can initiate the RRC connection re-configuration process to the UE again. Figure 3 and Figure 4 As described in, when base station A initiates the RRC connection reconfiguration process to the UE, it first sends an RRC connection reconfiguration message to the UE. In some implementations, the UE fails to perform a protocol check according to the RRC reconfiguration message (such as RRC connection reconfiguration message 41). In this case, the UE will initiate the RRC connection reestablishment process to base station A again, resulting in interruption of UE communication and affecting the user experience.

[0124] To solve the above problems, an embodiment of the present application provides a communication method, based on which, after the UE fails to perform protocol verification on the CA configuration, it can update the UE capability information to the access network device by initiating a tracking area update process. Based on the updated UE capability information, it can be avoided that in the subsequent RRC connection reconfiguration process, the UE enters the RRC connection reestablishment process due to the failure of the protocol verification of the CA configuration, so that the UE side can maintain normal communication.

[0125] Exemplary, reference Figure 5 ,by Figure 1 Take the scenario shown in FIG. 1 as an example. The solution provided in the embodiment of the present application is illustrated by way of example. Figure 5 As shown, the program may include:

[0126] S501. UE initiates a random access procedure to base station A.

[0127] In some embodiments of the present application, base station A may also be referred to as a first access network device.

[0128] S502: UE initiates an RRC connection establishment process to base station A.

[0129] S503: UE initiates an attach procedure to base station A.

[0130] In this example, S501 and S502 correspond to Figure 2 For the specific implementation of S201 and S202, please refer to the description of S201 and S202. For the specific implementation of S503, please refer to Figure 2 S203 to S207 shown are not described in detail here.

[0131] In an embodiment of the present application, the UE reports UE capability information 50 to the base station A in the attachment process of S503. Taking the frequency band supported by the UE including the first frequency band and the second frequency band, and the supported CA combination including the first CA combination and the second CA combination as an example, the UE capability information 50 may include the second frequency band, the fourth frequency band, the second CA combination and the fourth CA combination. Among them, the fourth frequency band includes the first frequency band or the third frequency band, and the third frequency band is a frequency band not supported by the UE. The fourth CA combination includes the first CA combination or the third CA combination, and the third CA combination is a CA combination not supported by the UE. In addition, the frequency band supported by the UE may also include the fifth frequency band.

[0132] For example, the frequency bands supported by the UE are B1, B5, and B28A, and the CA combinations supported by the UE are CA_1_5 and CA_1_28A. The first frequency band may be B28A, the second frequency band may be B1, the third frequency band may be B28B, the fourth frequency band may be B28, and the fifth frequency band may be B5. The first CA combination may be a carrier aggregation of B1 and B28A, the second CA combination may be CA_1_5, i.e., a carrier aggregation of B1 and B5, the third CA combination may be a carrier aggregation of B1 and B28B, and the fourth CA combination may be CA_1_28, i.e., a carrier aggregation of B1 and B28. The UE capability information 50 may include B1, B5, B28, as well as CA_1_5 and CA_1_28.

[0133] Taking the example that the UE capability information 50 includes B1, B5, B28, CA_1_5, CA_1_28, and the UE supports B28A in B28, and supports carrier aggregation of B1 and B28A, the following example is described in detail.

[0134] S504. Base station A sends an RRC connection reconfiguration message 51 to the UE.

[0135] Exemplarily, based on the capability information reported by the UE (such as the UE capability information 50), the base station A sends an RRC connection reconfiguration message 51 to the UE. The RRC connection reconfiguration message 51 carries the CA configuration A, and the CA configuration A is used to configure the CA combination for the UE.

[0136] In this example, CA configuration A includes at least one CA combination. For example, CA configuration A includes CA combination 2, and CA combination 2 includes carrier aggregation of B1 and B28B.

[0137] In some embodiments of the present application, the RRC connection reconfiguration message 51 may be referred to as a first RRC connection reconfiguration message or named as another name without limitation.

[0138] S505. The UE determines that the protocol verification fails according to the RRC connection reconfiguration message 51 and its own supported capabilities.

[0139] Exemplarily, the UE may perform a protocol check on the CA combination 2 according to the RRC connection reconfiguration message 51 and the capabilities supported by itself. Specifically, the UE may determine whether the CA combination configured by the base station A includes the frequency band supported by the UE and / or whether the CA combination configured by the base station is included in the CA combination supported by the UE based on the CA configured by the base station and the frequency band and CA combination supported by itself. If included, it is determined that the protocol check succeeds. Otherwise, if the CA combination configured by the base station A includes the frequency band not supported by the UE and / or the CA combination configured by the base station A is not included in the CA combination supported by the UE, it is determined that the protocol check fails.

[0140] For example, the CA combination 2 configured by the base station for the UE includes the carrier aggregation of B1 and B28B. The UE actually supports B28A in B28, and the carrier aggregation of B1 and B28A, but does not support B28B. CA combination 2 configured by base station A contains a frequency band that the UE does not support. CA combination 2 is a CA combination that the UE does not support, and the UE fails the protocol verification of CA combination 2.

[0141] In an embodiment of the present application, after the UE fails to verify the RRC connection reconfiguration message 51 protocol, the UE may be triggered to initiate a tracking area update process 1 to the base station A. The tracking area update process 1 includes a UE capability query process_1. Through the UE capability query process_1, the UE may update the CA combination supported by the UE to the base station A.

[0142] The following takes the failure of the UE to verify the CA combination 2 protocol as an example to illustrate the specific execution of the tracking area update process 1. In this example, the specific execution of the tracking area update process 1 may include S506 to S510.

[0143] S506. UE sends a tracking area update request 52 to base station A.

[0144] In this example, the tracking area update request 52 may be used to trigger the base station A to query the frequency bands and CA combinations supported by the UE; the tracking area update request 52 includes a TrackingAreaUpdateRequest.

[0145] Accordingly, base station A receives the tracking area update request 52 .

[0146] In some embodiments of the present application, the tracking area update request 52 may also be referred to as a first tracking area update request or a first update request, without limitation.

[0147] S507 . Base station A sends a UE capability query message 53 to the UE according to the tracking area update request 52 .

[0148] Exemplarily, after receiving the tracking area update request 52, the base station A may initiate a UE capability query process_1 to the UE, such as sending a UE capability query message 53 to the UE. The UE capability query message 53 is used to query the frequency bands and CA combinations supported by the UE.

[0149] In this example, the specific implementation of S507 can refer to Figure 2 The S204 shown is not described in detail here.

[0150] In some embodiments of the present application, the UE capability query message 53 may also be referred to as a first terminal capability query message or a first query message, without limitation.

[0151] S508. The UE sends UE capability information 54 to base station A. The UE capability information 54 does not include CA_1_28.

[0152] In some embodiments of the present application, after receiving the UE capability query message 53, the UE feeds back UE capability information 54 (such as UECapabilityInformation) to base station A. The UE capability information 54 does not include CA_1_28, and may include B1, B5, B28 and CA_1-5.

[0153] In other embodiments of the present application, the UE capability information 54 may also be referred to as first terminal capability information or first capability information, without limitation.

[0154] Correspondingly, base station A receives UE capability information 54 .

[0155] S509. Base station A sends a tracking area update accept message 55 to the UE.

[0156] In some embodiments of the present application, the tracking area update accept message 55 may also be referred to as a first tracking area update accept message.

[0157] S510 , UE sends a tracking area update completion message 56 to base station A.

[0158] In some embodiments of the present application, the tracking area update complete message 56 may also be referred to as a first tracking area update complete message.

[0159] Exemplarily, after receiving the capability information 54 sent by the UE, the base station A sends a tracking area update accept message 55 (eg, TrackingAreaUpdateAccept) to the UE.

[0160] Optionally, after receiving the tracking area update completion message 56, the UE feeds back a tracking area update completion message 57 (such as TrackingAreaUpdateComplete) to the base station A.

[0161] It should be noted that in the tracking area update process 1 from S506 to S510, for the message sent by the UE received by the base station A, such as S506, S508 and S510, the base station A will also directly transparently transmit it to the MME. Correspondingly, the message returned by the base station A to the UE, such as S507 and S509, is first sent by the MME to the base station A, and then transparently transmitted by the base station A to the UE.

[0162] S511. Base station A sends an RRC connection reconfiguration message 57 to the UE.

[0163] Exemplarily, after the tracking area update process 1 is completed, based on the UE capability information 54, the base station A sends an RRC connection reconfiguration message 57 to the UE to initiate the RRC connection reconfiguration process to the UE again. The RRC connection reconfiguration message 57 carries the CA configuration B. The CA configuration C is used to configure a CA combination for the UE, and the CA configuration B includes at least one CA combination.

[0164] In this example, CA_1_5 may be included in CA configuration B. Base station A may send an RRC connection reconfiguration message 57 carrying CA_1_5 to the UE.

[0165] In some embodiments of the present application, the RRC connection reconfiguration message 57 may also be referred to as a second RRC connection reconfiguration message.

[0166] S512: The UE determines that the protocol verification is successful based on the RRC connection reconfiguration message 57 and its own supported capabilities.

[0167] Exemplarily, the protocol executed by the UE may include performing a protocol check on the CA configuration B carried in the RRC connection reconfiguration message 57 .

[0168] For example, the UE may perform a protocol check on CA_1_5. In this example, CA_1_5 is a CA combination supported by the UE. Accordingly, the UE succeeds in performing a protocol check on CA_1_5.

[0169] Therefore, if other protocol checks are also successful, the UE can execute S513.

[0170] S513. UE sends an RRC connection reconfiguration complete message 58 to base station A.

[0171] In this example, the UE may send an RRC connection reconfiguration complete message 58 to the base station A indicating that the RRC connection reconfiguration is successful. Figure 3 The S303 shown is not described in detail here.

[0172] exist Figure 5In the example, after the protocol check of CA configuration A fails, the UE reports UE capability information 54 to base station A by initiating tracking area update process 1, and UE capability information 54 does not include CA_1_28. Based on UE capability information 54, base station A can configure CA_1_5 for the UE, and CA_1_5 is the CA combination supported by the UE. In this way, base station A can initiate the RRC connection reconfiguration process to the UE again, so that the UE succeeds in the CA_1_5 protocol check. RRC connection reestablishment is avoided, so that the UE can maintain normal communication.

[0173] In the above embodiment, the example in which the UE successfully performs the protocol check according to the RRC connection reconfiguration message 57 is used for explanation. In other embodiments of the present application, the UE fails the protocol check according to the RRC connection reconfiguration message 57. Correspondingly, the embodiment of the present application also provides another communication method, which can trigger the UE to initiate the tracking area update process 2 after the protocol check fails according to the RRC connection reconfiguration message 57. Through the tracking area update process 2, the UE can report the information of the working frequency bands supported by the UE and the CA combination to the base station A again. This allows the UE to avoid triggering the RRC connection reestablishment after the subsequent RRC connection reconfiguration process ends.

[0174] Exemplary, reference Figure 6 , the scheme provided in the embodiments of the present application is illustrated by way of example.

[0175] like Figure 6 As shown, the program may include:

[0176] S601. UE initiates a random access procedure to base station A.

[0177] S602: UE initiates an RRC connection establishment process to base station A.

[0178] S603: UE initiates an attach procedure to base station A.

[0179] In an embodiment of the present application, the UE reports UE capability information 60 to the base station A in the attachment process of S603. Taking the UE capability information 60 including B1, B5, B28, CA_1_5, CA_1_28, the UE supports B28A in B28, and supports carrier aggregation of B1 and B28A as an example, the following example is described in detail.

[0180] S604. Base station A sends an RRC connection reconfiguration message 601 to the UE.

[0181] S605. The UE determines that the protocol verification fails according to the RRC connection reconfiguration message 601 and its own supported capabilities.

[0182] S606: UE initiates tracking area update process 1 to base station A.

[0183] In the embodiment of the present application, S601 to S605 correspond to Figure 5 For the specific execution of S501 to S505, please refer to the description of S501 to S505. For the specific execution of tracking area update process 1, please refer to Figure 5 S506 to S510 shown are not described in detail here.

[0184] S607. Base station A sends an RRC connection reconfiguration message 602 to the UE.

[0185] In some embodiments of the present application, base station A may still configure CA combination 2 for the UE, and send CA combination 2 to the UE by carrying it in the RRC connection reconfiguration message 602. In combination with the above description, CA combination 2 includes carrier aggregation of B1 and B28B. Since the UE does not support B28B, CA combination 2 is a CA combination not supported by the UE.

[0186] In some other embodiments of the present application, the RRC connection reconfiguration message 602 may also be referred to as a fourth RRC connection reconfiguration message.

[0187] S608: The UE determines that the protocol verification fails according to the RRC connection reconfiguration message 602 and its own supported capabilities.

[0188] In this example, the UE fails to perform a protocol check on CA combination 2 according to the RRC connection reconfiguration message 602. The specific execution of the protocol check on CA combination 2 by the UE can refer to the description in S505, which will not be repeated here.

[0189] In some embodiments of the present application, after the protocol check performed by the UE according to the RRC connection reconfiguration message 602 fails, the UE may be triggered to initiate a tracking area update process 2 to the base station A. The tracking area update process 2 includes a UE capability query process_2. The UE may update the information of the working frequency bands and CA combinations supported by the UE to the base station A through the UE capability query process_2.

[0190] The following takes the failure of the UE to verify the CA combination 2 protocol as an example to illustrate the specific execution of the tracking area update process 2. In this example, the specific execution of the tracking area update process 2 may include S609 to S613.

[0191] S609 , UE sends a tracking area update request 603 to base station A.

[0192] Exemplarily, the UE may initiate a tracking area update process 2 to the base station A through a tracking area update request 603 .

[0193] Correspondingly, base station A receives tracking area update request 603 .

[0194] In this example, the specific implementation of S609 can refer to Figure 5 The description in S506 in .

[0195] In the embodiment of the present application, the tracking area update request 603 is also used to trigger the UE capability query process_2. The specific execution of the UE capability query process_2 can refer to the following descriptions in S610 and S611.

[0196] In some other embodiments of the present application, the tracking area update request 603 may also be referred to as a third tracking area update request.

[0197] S610 : Base station A sends a UE capability query message 604 to the UE according to the tracking area update request 603 .

[0198] Exemplarily, after receiving the tracking area update request 603, base station A may initiate UE capability query process_2 to the UE by sending a UE capability query message 604. The UE capability query message 604 is used to query the frequency bands and CA combinations supported by the UE.

[0199] In this example, the specific implementation of S610 can refer to Figure 5 The instructions in S507 in.

[0200] In some other embodiments of the present application, the UE capability query message 604 may also be referred to as a third terminal capability query message.

[0201] S611. The UE sends UE capability information 605 to base station A. The UE capability information 605 does not include B28 and CA_1_28.

[0202] In some embodiments of the present application, after receiving the UE capability query message 604, the UE feeds back UE capability information 605 (such as UECapabilityInformation) to the base station A. The UE capability information 605 does not include B28 and CA_1_28, but includes B1, B5 and CA_1_5. That is, the UE updates the working frequency bands and CA combinations supported by the UE to the base station A through the tracking area update process 2.

[0203] Correspondingly, base station A receives UE capability information 605 .

[0204] In other embodiments of the present application, the UE capability information 605 may also be referred to as third terminal capability information.

[0205] S612. Base station A sends a tracking area update accept message 606 to the UE.

[0206] S613: UE sends a tracking area update completion message 607 to base station A.

[0207] In the example, S612 and S613 correspond to Figure 5 For S509 and S510, the specific execution can refer to the description in S509 and S510, which will not be repeated here.

[0208] S614. Base station A sends an RRC connection reconfiguration message 608 to the UE.

[0209] Exemplarily, after the tracking area update process 2 is completed, based on the UE capability information 605, the base station A sends an RRC connection reconfiguration message 608 to the UE to initiate the RRC connection reconfiguration process to the UE again. The RRC connection reconfiguration message 608 carries a CA configuration C. The CA configuration C is used to configure a CA combination for the UE, and the CA configuration C includes at least one CA combination.

[0210] For example, CA configuration C includes CA_1_5.

[0211] In some other embodiments of the present application, the RRC connection reconfiguration message 608 may also be referred to as a fifth RRC connection reconfiguration message.

[0212] S615. The UE determines that the protocol verification is successful according to the RRC connection reconfiguration message 608 and its own supported capabilities.

[0213] Exemplarily, after receiving the RRC connection reconfiguration message 608, the UE performs a protocol check on CA_1_5.

[0214] In this example, CA_1_5 is a CA combination supported by the UE. Accordingly, the UE successfully performs a protocol check on CA_1_5 according to the RRC connection reconfiguration message 608 .

[0215] Therefore, when other protocol checks are also successful, the UE can perform the operation of S616.

[0216] S616. The UE sends an RRC connection reconfiguration complete message 609 to base station A.

[0217] In this example, the UE can send an RRC connection reconfiguration complete message 609 to the base station A in S616, indicating that the RRC connection reconfiguration is successful. For the specific execution of S616, please refer to Figure 3 The S303 shown is not described in detail here.

[0218] exist Figure 6In the example, after the UE fails to perform a protocol check on CA combination 2 according to the RRC connection reconfiguration message 602, the UE updates the working frequency bands and CA combinations supported by the UE to base station A by initiating tracking area update process 2, and carries it in the UE capability information 605 to send it to base station A. Among them, the UE capability information 605 does not include B28 and CA_1_28. Based on the UE capability information 605, base station A can configure CA_1_5 for the UE, and CA_1_5 is a CA combination supported by the UE. In this way, base station A can initiate the RRC connection reconfiguration process to the UE again, so that the UE successfully performs a protocol check on CA_1_5. RRC connection re-establishment is avoided, so that normal communication can be maintained in the UE.

[0219] In the above embodiment, the example in which the UE successfully performs the protocol check according to the RRC connection reconfiguration message 608 is used for explanation. In other embodiments of the present application, the UE fails to perform the protocol check according to the RRC connection reconfiguration message 608. Correspondingly, the embodiment of the present application also provides another communication method, which can trigger the UE to initiate the tracking area update process 3 after the protocol check fails according to the RRC connection reconfiguration message 608. Through the tracking area update process 3, the UE can report the UE capability information to the base station A again. Among them, the UE capability information does not include the CA combination.

[0220] like Figure 7 As shown, the program may include:

[0221] S701. UE initiates a random access procedure to base station A.

[0222] S702: UE initiates an RRC connection establishment process to base station A.

[0223] S703: UE initiates an attach procedure to base station A.

[0224] In an embodiment of the present application, the UE reports UE capability information 70 to the base station A in the attachment process of S703. Taking the UE capability information 70 including B1, B5, B28, CA_1_5, CA_1_28, the UE supports B28A in B28, and supports carrier aggregation of B1 and B28A as an example, the following example is described in detail.

[0225] S704. Base station A sends an RRC connection reconfiguration message 71 to the UE.

[0226] S705. The UE determines that the protocol verification has failed according to the RRC connection reconfiguration message 71 and its own supported capabilities.

[0227] S706. UE initiates tracking area update process 1 to base station A.

[0228] S707. Base station A sends an RRC connection reconfiguration message 72 to the UE.

[0229] S708. The UE determines that the protocol verification has failed based on the RRC connection reconfiguration message 72 and its own supported capabilities.

[0230] S709. UE initiates tracking area update process 2 to base station A.

[0231] In the embodiment of the present application, S701 to S708 correspond to Figure 6 For the specific execution of S601 to S608, please refer to the description of S601 to S608. For the specific execution of the tracking area update process 2 in S709, please refer to Figure 6 S609 to S613 shown are not described in detail here.

[0232] S710. Base station A sends an RRC connection reconfiguration message 73 to the UE.

[0233] In some embodiments of the present application, base station A configures CA combination 2 for UE again, and sends CA combination 2 to UE by carrying it in RRC connection reconfiguration message 73. In this embodiment, CA combination 2 includes carrier aggregation of B1 and B28B. Since UE does not support B28B, CA combination 2 is a CA combination not supported by UE.

[0234] In some other embodiments of the present application, the RRC connection reconfiguration message 73 may also be referred to as a sixth RRC connection reconfiguration message.

[0235] S711. The UE determines that the protocol verification has failed based on the RRC connection reconfiguration message 73 and its own supported capabilities.

[0236] In this example, the UE fails to perform protocol check on CA combination 2 according to RRC connection reconfiguration message 73, that is, the UE fails to configure CA combination 2. The specific execution of the UE performing protocol check on CA combination 2 can refer to the description in S505, which will not be repeated here.

[0237] In an embodiment of the present application, after the protocol check performed by the UE according to the RRC connection reconfiguration message 73 fails, the UE may be triggered to initiate a tracking area update process 3 to the base station A. The tracking area update process 3 includes a UE capability query process_3. The UE may report UE capability information that does not include a CA combination to the base station A through the UE capability query process_3.

[0238] In the present application, the specific execution of the tracking area update process 3 may include S712 to S716.

[0239] S712. UE sends a tracking area update request 74 to base station A.

[0240] Exemplarily, the UE may initiate a tracking area update process 3 to the base station A through a tracking area update request 74. In this example, the specific execution of S712 may refer to Figure 5 The description in S506 in .

[0241] Accordingly, base station A receives the tracking area update request 74 .

[0242] In the embodiment of the present application, the tracking area update request 74 is also used to trigger the UE capability query process_3. The specific execution of the UE capability query process_3 can refer to the description in S713 and S714 below.

[0243] In some other embodiments of the present application, the tracking area update request 74 may also be referred to as a fourth tracking area update request.

[0244] S713 . Base station A sends a UE capability query message 75 to the UE according to the tracking area update request 74 .

[0245] Exemplarily, after receiving the tracking area update request 74, the base station A may initiate the UE capability query process_3 to the UE by sending a UE capability query message 75. The UE capability query message 75 is used to query the frequency bands and CA combinations supported by the UE.

[0246] In this example, the specific implementation of S713 can refer to Figure 5 The instructions in S507 in.

[0247] In some other embodiments of the present application, the UE capability query message 75 may also be referred to as a fourth capability query message.

[0248] S714. The UE sends UE capability information 76 to base station A. The UE capability information 76 does not include CA_1_5 and CA_1_28.

[0249] In some embodiments of the present application, after receiving the UE capability query message 75, the UE feeds back UE capability information 76 (such as UECapabilityInformation) to the base station A. The UE capability information 76 does not include the CA combination, but only includes the working frequency band. That is, the UE capability information does not include CA_1_5 and CA_1_28, but includes B1, B5 and B28.

[0250] In other embodiments of the present application, the UE capability information 76 may also be referred to as fourth capability information.

[0251] Accordingly, base station A receives UE capability information 76 .

[0252] S715. Base station A sends a tracking area update accept message 77 to the UE.

[0253] S716. UE sends a tracking area update completion message 78 to base station A.

[0254] In the example, S715 and S716 correspond to Figure 5 For S509 and S510, the specific execution can refer to the description in S509 and S510, which will not be repeated here.

[0255] In some other embodiments of the present application, after the UE fails the protocol check according to the RRC connection reconfiguration message 71 in S704, it can initiate the tracking area update process 3 and perform the operations in S712 to S716.

[0256] In some other embodiments of the present application, after the UE fails the protocol check according to the RRC connection reconfiguration message 72 in S707, it can initiate the tracking area update process 3 and perform the operations in S712 to S716.

[0257] exist Figure 7 In the example, after the UE fails to verify the CA combination 2 protocol according to the RRC connection reconfiguration message 73, the UE reports the UE capability information 76 to the base station A by initiating the tracking area update process 3. Among them, the UE capability information 76 does not include the CA combination. In this way, based on the UE capability information 76, the base station side will not configure the CA combination for the UE. In the subsequent RRC connection reconfiguration process, the UE is prevented from entering the RRC connection reestablishment due to the failure of the CA configuration protocol verification, so that the UE can maintain normal communication.

[0258] In some other embodiments of the present application, based on Figure 1 In the scenario shown, the present application embodiment also provides another communication method. For example, refer to Figure 8 , the scheme provided in the embodiments of the present application is illustrated by way of example.

[0259] like Figure 8 As shown, the program may include:

[0260] S801. UE initiates a random access procedure to base station A.

[0261] S802: UE initiates an RRC connection establishment process to base station A.

[0262] S803: UE initiates an attach procedure to base station A.

[0263] In an embodiment of the present application, the UE reports UE capability information 80 to the base station A in the attachment process of S803. Taking the UE capability information 80 including B1, B5, B28, CA_1_5, CA_1_28, the UE supports B28A in B28, and supports carrier aggregation of B1 and B28A as an example, the following example is described in detail.

[0264] S804. Base station A sends an RRC connection reconfiguration message 81 to the UE.

[0265] S805. The UE determines that the protocol verification fails according to the RRC connection reconfiguration message 81 and its own supported capabilities.

[0266] In this example, S801 to S805 correspond to Figure 5 For S501 to S505 in the process, the specific execution may refer to the description in S501 and S505, which will not be described again here.

[0267] In an embodiment of the present application, after the protocol check performed by the UE according to the RRC connection reconfiguration message 81 fails, the UE may be triggered to initiate a tracking area update process 2 to the base station A. In the tracking area update process 2, the UE may update the information of the working frequency bands and CA combinations supported by the UE to the base station A.

[0268] S806. UE initiates tracking area update process 2 to base station A.

[0269] In this example, in the tracking area update process 2, the UE reports the UE capability information to the base station A. The UE capability information may correspond to the UE capability information 605 excluding B28 and CA_1_28. For the specific execution of S806, please refer to Figure 6 S609 to S613 in the above are not described in detail here.

[0270] S807. Base station A sends an RRC connection reconfiguration message 82 to the UE.

[0271] Exemplarily, after the tracking area update process 2 is completed, the base station A sends an RRC connection reconfiguration message 82 to the UE to initiate the RRC connection reconfiguration process to the UE again. The RRC connection reconfiguration message 82 carries a CA configuration D. The CA configuration D is used to configure a CA combination for the UE, and the CA configuration D includes at least one CA combination.

[0272] In some other embodiments of the present application, the RRC connection reconfiguration message 82 may also be referred to as a third RRC connection reconfiguration message.

[0273] S808. The UE performs a protocol check according to the RRC connection reconfiguration message 82 and its own supported capabilities.

[0274] Exemplarily, after receiving the RRC connection reconfiguration message 82, the UE performs a protocol check on the CA configuration D. In the example, the specific execution of the protocol check performed by the UE on the CA configuration D can refer to the description in S505.

[0275] In one implementation, CA configuration D includes CA_1_5, where CA_1_5 is a CA combination supported by the UE. In this implementation, the UE performs a protocol check on CA_1_5 successfully according to the RRC connection reconfiguration message 82 .

[0276] Therefore, when other protocol checks are also successful, the UE can perform the operation of S809.

[0277] In another implementation, CA configuration D includes CA combination 2, and CA combination 2 includes carrier aggregation of B1 and B28B. In this implementation, B28B is a frequency band not supported by the UE, and CA combination 2 is a CA combination not supported by the UE. The UE fails to perform a protocol check on CA combination 2 according to the RRC connection reconfiguration message 82.

[0278] In some embodiments of the present application, after the protocol check performed by the UE according to the RRC connection reconfiguration message 82 fails, the UE may be triggered to initiate a tracking area update process 3 to the base station A. In the tracking area update process 3, the UE may update the UE capability information to the base station A. The updated capability information does not include the CA combination information.

[0279] S809. UE sends an RRC connection reconfiguration complete message 83 to base station A.

[0280] For example, after the UE successfully performs protocol verification on the CA configuration D, it can send an RRC connection reconfiguration completion message 83 indicating that the RRC connection reconfiguration is successful to the base station A in S809. The specific execution of S809 can refer to Figure 3 The S303 shown is not described in detail here.

[0281] S810. UE initiates tracking area update process 3 to base station A.

[0282] Exemplarily, in the tracking area update process 3, the UE sends a tracking area update request 84 to the base station A to trigger the base station A to query the frequency bands and CA combinations supported by the UE. The base station A can send a UE capability query message 85 to the UE to query the frequency bands and CA combinations supported by the UE. In response to the UE capability query message 85, the UE reports the UE capability information 86 to the base station A. The UE capability information 86 does not include CA_1_5 and CA_1_28.

[0283] In other embodiments of the present application, the tracking area update request 84 may also be referred to as a second tracking area update request, the UE capability query message 85 may also be referred to as a second terminal capability query message, and the UE capability information 86 may also be referred to as second terminal capability information.

[0284] In the above Figures 5 to 8 In the illustrated scheme, after the UE fails to perform protocol verification on the CA configuration, the tracking area update process can be triggered. In the tracking area update process, the UE can update the UE capability information to the base station A. Based on the updated UE capability information, it can be avoided that in the subsequent RRC connection reconfiguration process, the UE enters the RRC connection reestablishment process due to the failure of the protocol verification on the CA configuration, so that the UE side can maintain normal communication.

[0285] It should be noted that in Figures 5 to 8 In the examples shown, the description is made by taking the case where the UE supports some of the frequencies in B28 as an example. In other embodiments, the UE may also support some of the frequencies in B41, such as B41A, and support CA combinations related to B41A.

[0286] In other embodiments of the present application, based on Figure 1 In the scenario shown, the embodiment of the present application also provides another communication method, based on which the UE can ignore the CA configuration that fails the protocol verification, and send an RRC connection reconfiguration completion message to the base station when other protocols are also verified successfully. This avoids triggering the RRC connection reestablishment process due to protocol verification failure.

[0287] Exemplary, reference Fig. 9 , the scheme provided in the embodiments of the present application is illustrated by way of example.

[0288] like Fig. 9 As shown, the program may include:

[0289] S901. UE initiates a random access procedure to base station A.

[0290] S902: UE initiates an RRC connection establishment process to base station A.

[0291] S903: UE initiates an attach procedure to base station A.

[0292] In this example, S901 to S903 correspond to Figure 5 For S501 to S503 in the above, the specific execution can refer to the description in S501 and S503, which will not be repeated here.

[0293] In an embodiment of the present application, the UE reports UE capability information 90 to the base station A in the attachment process of S903. Taking the UE capability information 90 including B1, B5, B28, CA_1_5, CA_1_28, and the UE actually supporting B28A in B28, and supporting carrier aggregation of B1 and B28A as an example, the following example is described in detail.

[0294] S904. Base station A sends an RRC connection reconfiguration message 91 to the UE.

[0295] Exemplarily, the RRC connection reconfiguration message 91 carries CA configuration E, where CA configuration E is used to configure a CA combination for the UE, and CA configuration E includes at least one CA combination.

[0296] In this example, CA configuration E includes CA combination A, and base station A can send an RRC connection reconfiguration message 91 carrying CA combination A to the UE.

[0297] In some embodiments of the present application, CA combination A may also be referred to as the fifth CA combination.

[0298] The following example takes CA configuration E including CA combination A as an example to illustrate the method of the embodiment of the present application.

[0299] S905. The UE fails to perform protocol verification on CA combination A according to the RRC connection reconfiguration message 91 and its own supported capabilities.

[0300] In this example, CA combination A may correspond to carrier aggregation of frequency band 1 and frequency band 2.

[0301] In other embodiments of the present application, frequency band 1 may also be referred to as the fifth frequency band, and frequency band 2 may also be referred to as the sixth frequency band.

[0302] In some implementations, the UE supports band 1 and band 2, but the UE does not support carrier aggregation of band 1 and band 2. For example, band 1 is B1 and band 2 is B5, then CA combination A includes carrier aggregation of B1 and B5.

[0303] In some other implementations, the UE does not support band 1 or band 2.

[0304] For example, taking the case where the UE does not support frequency band 2, frequency band 1 is B1, and frequency band 2 is B28B, then CA combination A includes carrier aggregation of B1 and B28B.

[0305] In the above two implementations, the UE does not support CA combination A. Accordingly, the UE fails to perform a protocol check on the CA combination A carried in the RRC connection reconfiguration message 91. The specific execution of the protocol check on the CA combination A by the UE can refer to the description in S505.

[0306] In some embodiments of the present application, the UE may indicate whether the CA combination A passes the protocol verification by setting the verification identifier A. The verification identifier A includes a first value or a second value. When the verification identifier A is the first value, it corresponds to a successful protocol verification of the CA combination A. When the verification identifier A is the second value, it corresponds to a failed protocol verification of the CA combination A.

[0307] For example, after the protocol verification of CA combination A fails, the UE may set the verification flag A to a second value to indicate that CA combination A fails to pass the protocol verification.

[0308] In this embodiment, the UE may also be pre-configured with an ignorable item, which includes a check item A. Check item A is a protocol check item performed by CA combination A. In this example, during the process of the UE performing the protocol check, CA combination A fails the protocol check. Since the protocol check item corresponding to CA combination A (i.e., check item A) is included in the ignorable item, the UE may ignore the failed item.

[0309] It should be noted that, in the present application, other configuration information may also be carried in the RRC connection reconfiguration message 91. The UE may perform a protocol check on the other configuration information. If the other configuration information is successfully checked, the UE may perform operation S906.

[0310] S906. UE sends an RRC connection reconfiguration complete message 92 to base station A.

[0311] In this example, when the UE fails to perform protocol verification on CA combination A but succeeds in performing protocol verification on other configuration information, the UE may send an RRC connection reconfiguration completion message 92 to base station A to indicate that the current RRC connection reconfiguration process of the UE has been successfully completed.

[0312] In some other embodiments of the present application, the RRC connection reconfiguration complete message 92 may also be referred to as a first RRC connection reconfiguration complete message.

[0313] It should be noted that after the RRC connection reconfiguration process is successfully completed, according to the protocol, base station A sends a MAC control unit activation instruction in the media access control layer (Media Access Control, MAC) to control the UE to activate CA combination A.

[0314] In some embodiments of the present application, after the RRC connection reconfiguration process is successfully completed, the following operations may also be performed between the UE and the base station A to complete the activation process of the CA combination A.

[0315] S907. Base station A sends a MAC control unit activation instruction 93 to the UE.

[0316] It should be noted that, in this embodiment, the CA combination A sent to the UE is correspondingly configured with an identity A. The identity A is used to identify the CA combination A.

[0317] Exemplarily, the MAC control unit activation instruction 93 carries a field A1, which corresponds to the identity A. The field A1 includes a third value or a fourth value. The third value corresponds to activating the CA combination A, and the fourth value corresponds to not activating the CA combination A. In this example, the field A1 is the third value, and the MAC control unit activation instruction 93 is used to indicate the activation of the CA combination A corresponding to the identity A.

[0318] In some other embodiments of the present application, the MAC control unit activation instruction 93 may also be referred to as a first activation instruction.

[0319] It should be noted that, in this example, base station A can send a MAC control unit activation instruction 93 to the UE via a MAC control unit. The MAC control unit can implement signaling interaction between the MAC layer of the base station and the MAC layer of the UE. The MAC layer is the media access control layer. In some implementations, the MAC control unit can also be a MAC Control Element.

[0320] S908. The UE keeps CA combination A in an inactive state according to the MAC control unit activation instruction 93.

[0321] It should be noted that in the UE, the CA combination A is configured with field A2, which corresponds to field A1. Before receiving the MAC control unit activation instruction 93, field A2 is configured with the fourth value, corresponding to the CA combination A being in an inactive state.

[0322] Exemplarily, after receiving the MAC control unit activation instruction 93 at the MAC layer, the UE may keep the CA combination A in an inactive state.

[0323] For example, when the verification identity A corresponds to the second value, the UE maintains the field A2 of the CA combination A as the fourth value according to the field A1 carried in the MAC control unit activation instruction 93. Thus, the UE does not activate the CA combination A that fails the verification. In combination with the above description, when the verification identity A is the second value, the protocol verification corresponding to the CA combination A fails.

[0324] pass Fig. 9 In the example of , the UE can ignore the verification failure item of CA combination A, and send an RRC connection reconfiguration completion message to base station A when other configuration information verification succeeds, so that the RRC connection reconfiguration process is successfully completed. After receiving the instruction for instructing to activate CA combination A, the UE keeps CA combination A in an inactive state, so that the activation process of CA combination A initiated by the base station side ends normally.

[0325] The above example is described by taking the CA configuration E including only the CA combination A as an example. In other embodiments of the present application, the CA configuration E includes the CA combination B and the CA combination C. Fig.10 , which is an interactive schematic diagram of another communication method provided in an embodiment of the present application.

[0326] Exemplary, reference Fig.10 , the scheme provided in the embodiments of the present application is illustrated by way of example.

[0327] like Fig.10 As shown, the program may include:

[0328] S1001. UE initiates a random access procedure to base station A.

[0329] S1002. UE initiates an RRC connection establishment process to base station A.

[0330] S1003. UE initiates an attachment process to base station A.

[0331] In this example, S1001 to S1003 correspond to Figure 5 For S501 to S503 in the above, the specific execution can refer to the description in S501 and S503, which will not be repeated here.

[0332] S1004. Base station A sends an RRC connection reconfiguration message 101 to the UE.

[0333] In this example, the RRC connection reconfiguration message 101 carries CA configuration E, and CA configuration E includes CA combination B and CA combination C. Base station A may send the RRC connection reconfiguration message 101 carrying CA combination B and CA combination C to the UE.

[0334] S1005. The UE successfully verifies the CA combination B protocol based on the RRC connection reconfiguration message 101 and its own supported capabilities, but fails to verify the CA combination C protocol.

[0335] In this example, CA combination B is a CA combination supported by the UE, and CA combination C is a CA combination not supported by the UE. Accordingly, the UE succeeds in performing a protocol check on CA combination B, and fails in performing a protocol check on CA combination C.

[0336] In some embodiments of the present application, the UE may indicate whether the CA combination B passes the verification by setting the verification flag B. Similarly, the UE may indicate whether the CA combination C passes the verification by setting the verification flag C. The verification flag B and the verification flag C include a first value or a second value. The first value corresponds to a successful protocol verification, and the second value corresponds to a failed protocol verification.

[0337] For example, after the UE successfully verifies the protocol of CA combination B, the verification flag B may be set to the first value. After the UE fails to verify the protocol of CA combination C, the verification flag C may be set to the second value.

[0338] It should be noted that, in the present application, other configuration information may also be carried in the RRC connection reconfiguration message 101. The UE may perform a protocol check on the other configuration information. If the other configuration information is successfully checked, the UE may perform operation S1006.

[0339] S1006. UE sends an RRC connection reconfiguration complete message 102 to base station A.

[0340] In this example, the UE may send an RRC connection reconfiguration complete message 102 to base station A to indicate that the current RRC connection reconfiguration process of the UE is successfully completed.

[0341] It should be noted that after the RRC connection reconfiguration process is successfully completed, according to the protocol, base station A initiates the activation process of CA combination B and CA combination C to the UE.

[0342] In some embodiments of the present application, after the RRC connection reconfiguration process is successfully completed, the following operations may also be performed between the UE and the base station A to complete the activation process of the CA combination B and the CA combination C.

[0343] S1007. Base station A sends a MAC control unit activation instruction 103 to the UE.

[0344] It should be noted that, in this embodiment, the CA combination B sent to the UE is correspondingly configured with an identity identifier B, and the CA combination C sent to the UE is correspondingly configured with an identity identifier C. The identity identifier B is used to identify the CA combination B, and the identity identifier C is used to identify the CA combination C.

[0345] Exemplarily, the MAC control unit activation instruction 103 carries a field B1 and a field C1, wherein the field B1 corresponds to the identity B, and the field C1 corresponds to the identity C. Wherein, the field B1 and the field C1 include a fifth value or a sixth value. The fifth value of field B1 corresponds to activating CA combination B, and the sixth value of field B1 corresponds to deactivating CA combination B. Similarly, the fifth value of field C1 corresponds to activating CA combination C, and the sixth value of field C1 corresponds to deactivating CA combination C.

[0346] In this example, both field B1 and field C1 are fifth values, and the MAC control unit activation instruction 103 is used to instruct activation of CA combination B corresponding to identity B and CA combination C corresponding to identity C.

[0347] It should be noted that, in this example, base station A may send a MAC control unit activation instruction 103 to the UE via the MAC control unit.

[0348] S1008. The UE activates CA combination B according to the MAC control unit activation instruction 103, and keeps CA combination C in an inactivated state.

[0349] It should be noted that in the UE, the CA combination B is configured with field B2, and the CA combination C is configured with field C2. Among them, field B2 corresponds to field B1, and field C2 corresponds to field C1. Before receiving the MAC control unit activation instruction 103, field B2 and field C2 are configured as the sixth value, corresponding to both CA combination B and CA combination C being in an inactive state.

[0350] Exemplarily, the UE may receive a MAC control unit activation instruction 103 at the MAC layer. After receiving the MAC control unit activation instruction 103, the UE activates CA combination B according to the first value of the verification flag B. According to the second value of the verification flag C, the UE keeps CA combination C in an inactive state.

[0351] For example, the UE configures field B2 to be the fifth value and maintains field C2 to be the sixth value, so that the UE activates the CA combination B that succeeds in verification and does not activate the CA combination C that fails in verification.

[0352] pass Fig.10In the example of , the UE can ignore the CA combination C that failed the verification, and send an RRC connection reconfiguration completion message to the base station A when other configuration information is verified successfully, so that the RRC connection reconfiguration process is successfully completed. After receiving the instruction for instructing the activation of CA combination B and CA combination C, the UE activates the CA combination B that succeeded the verification, and keeps the CA combination C that failed the verification in an inactive state, so that the activation process of CA combination B and CA combination C initiated by the base station side ends normally.

[0353] It should be noted that in the above description, UE is taken as an example as a device used by a user.

[0354] In other embodiments of the present application, the UE may also be replaced by any other electronic device with a communication function. The electronic device may also be referred to as a terminal device or a terminal.

[0355] Exemplarily, the electronic device in the embodiment of the present application may include at least one of a mobile phone, a foldable electronic device, a tablet computer, a desktop computer, a laptop computer, a handheld computer, a notebook computer, an ultra-mobile personal computer (UMPC), a netbook, a cellular phone, a personal digital assistant (PDA), an augmented reality (AR) device, a virtual reality (VR) device, an artificial intelligence (AI) device, a wearable device, an in-vehicle device, a smart home device, or a smart city device. The embodiment of the present application does not impose any special restrictions on the specific type of the electronic device.

[0356] As an example, Fig.11 A schematic diagram of the composition of an electronic device provided in an embodiment of the present application.

[0357] like Fig.11 As shown, the electronic device may include a multi-layer structure. In this example, the electronic device may include a NAS layer 1101 , an RRC layer 1102 , a PDCP layer 1103 , an RLC layer 1104 , a MAC layer 1105 , and a PHY layer 1106 .

[0358] NAS is the abbreviation of Non Access Stratum, and NAS layer 1101 is also the non-access layer. NAS layer 1101 is mainly responsible for providing control and management of the non-access layer. For example, EPS bearer management, authentication, mobility management in the idle state (i.e., ECM-IDLE state) of the EPS connection management mode, responsible for generating paging messages for UEs in the ECM-IDLE state, security control and other functions.

[0359] The RRC layer 1102 is a high-level layer of the control plane, which is mainly responsible for controlling L1 / L2 to complete air interface resource transmission and providing information transmission services for the NAS layer 1101. Exemplarily, the RRC layer 1102 can be used to manage functions such as system message broadcasting, RRC connection control, mobility management, and measurement configuration reporting. Among them, RRC connection control management includes paging, establishing / modifying / suspending / resuming / releasing RRC connection, initial security activation, establishing / modifying / activating SRB / DRB, cell management in DC and CA modes, and radio link failure recovery.

[0360] PDCP is the abbreviation of Packet Data Convergence Protocol, and the PDCP layer 1103 is also the packet data convergence protocol layer. The PDCP layer 1103 is used to process RRC messages on the control plane and Internet Protocol (IP) packets on the user plane. Exemplarily, on the user plane, after the PDCP layer 1103 obtains the IP data packet from the upper layer, it can perform header compression and encryption on the IP data packet, and then submit it to the RLC layer 1104. The PDCP layer 1103 also provides in-order submission and duplicate packet detection functions to the upper layer. In the control plane, the PDCP layer 1103 provides signaling transmission services for the upper layer RRC, implements encryption and consistency protection of RRC signaling, and implements decryption and consistency checking of RRC signaling in the reverse direction.

[0361] RLC is the abbreviation of Radio Link Control, and the RLC layer 1104 is the radio link control layer. The RLC layer 1104 mainly provides radio link control functions and provides services such as segmentation, retransmission control, and on-demand transmission for the upper layer. The RLC layer 1104 includes three transmission modes: Transparent Mode (TM), Unacknowledged Mode (UM), and Acknowledged Mode (AM), and mainly provides functions such as error correction, segmentation, and reassembly.

[0362] MAC is the abbreviation of Media Access Control, and the MAC layer 1105 is the media access control layer. The MAC layer 1105 is used to provide mapping between logical channels and transport channels; multiplex MAC SDUs from one or more logical channels into a transport block and pass it to the PHY layer 1106; demultiplex the transport block from the PHY layer 1106 into multiple MAC SDUs and pass them to one or more logical channels; report scheduling information; perform error correction through HARQ; manage the priority between users through dynamic scheduling; and manage the priority of logical channels.

[0363] The PHY layer 1106 is the physical layer. The PHY layer 1106 provides mechanical, electrical, functional and regulatory characteristics for creating, maintaining and dismantling the physical link required for data transmission. The physical layer can be used to ensure that the original data can be transmitted on various physical media.

[0364] like Fig.11 As shown, in the embodiment of the present application, the above NAS layer 1101, RRC layer 1102, PDCP layer 1103, RLC layer 1104, MAC layer 1105, and PHY layer 1106 can be integrated in the first chip module of the terminal. For example, the first chip module can be a modem of the terminal.

[0365] In addition, in some embodiments, an application layer 1107 may be provided in the terminal. The application layer 1107 may be provided on the upper layer of the NAS layer 1101. The application layer may be used to process and judge the signaling from the NAS layer, and send communication signaling and data to the NAS layer.

[0366] In such Fig.11 In the example of , the application layer 1107 can be set in the second chip module of the terminal. For example, the second chip module can be an application processor (Application Processor Unit, referred to as APU or AP) of the terminal.

[0367] In other embodiments, the application 1107, the NAS layer 1101, the RRC layer 1102, the PDCP layer 1103, the RLC layer 1104, the MAC layer 1105, and the PHY layer 1106 may also be in the same chip module. The embodiment of the present application does not specifically limit the division and setting of each protocol layer in the terminal.

[0368] refer to Fig.12 , is a schematic diagram of another terminal 1200 provided in an embodiment of the present application. Fig.12As shown, the terminal 1200 may include: a processor 1201 and a memory 1202. The memory 1202 is used to store computer-executable instructions. Exemplarily, in some embodiments, when the processor 1201 executes the instructions stored in the memory 1202, the terminal 1200 may execute any of the methods shown in the above embodiments.

[0369] It should be noted that all relevant contents of each step involved in the above method embodiment can be referred to the functional description of the corresponding functional module and will not be repeated here.

[0370] Fig.13 A schematic diagram of the composition of a chip system 1300 is shown. The chip system 1300 may include: a processor 1301 and a communication interface 1302, which are used for the UE to implement the functions involved in the above embodiments. In a possible design, the chip system also includes a memory for storing program instructions and data necessary for the terminal. The chip system may be composed of chips, or may include chips and other discrete devices. It should be noted that in some implementations of the present application, the communication interface 1302 may also be referred to as an interface circuit. As a possible implementation, the chip system 1300 may correspond to the following: Fig.11 The first chip module shown is such as a modem.

[0371] It should be noted that all relevant contents of each step involved in the above method embodiment can be referred to the functional description of the corresponding functional module and will not be repeated here.

[0372] The functions or actions or operations or steps in the above embodiments can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using a software program, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that a computer can access or may include one or more servers, data centers and other data storage devices that can be integrated with the medium. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a solid state disk (SSD)).

[0373] Although the present application has been described in conjunction with specific features and embodiments thereof, it is obvious that various modifications and combinations may be made thereto without departing from the spirit and scope of the present application. Accordingly, this specification and the drawings are merely exemplary illustrations of the present application as defined by the appended claims, and are deemed to have covered any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, those skilled in the art may make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A communication method, characterized in that: The method is applied to a terminal, and a first radio resource control RRC connection is established between the terminal and a first access network device; the method comprises: receiving a first configuration message, where the first configuration message includes the fifth carrier aggregation (CA) combination; the first configuration message is used to configure the fifth CA combination for the terminal; In a case where the fifth CA combination is not supported by the terminal, a first configuration completion message is sent.

2. The method according to claim 1, characterized in that The frequency band of the fifth CA combination includes a fifth frequency band and a sixth frequency band; and the fifth CA combination is not supported by the terminal including: The fifth frequency band or the sixth frequency band is not supported; Or the fifth frequency band and the sixth frequency band are supported, and the fifth CA combination is included in the CA combinations not supported by the terminal.

3. The method according to claim 1 or 2, characterized in that: After sending the first configuration completion message, the method further includes: receiving a first activation instruction; wherein the first activation instruction is used to instruct activation of the fifth CA combination; In response to the first activation instruction, the fifth CA combination is kept in an inactive state.

4. The method according to claim 3, characterized in that The first configuration message also includes a sixth CA combination; the first configuration message is further used to configure the sixth CA combination for the terminal; the sixth CA combination is a CA combination supported by the terminal; After sending the first configuration completion message, the method further includes: receiving a second activation instruction; wherein the second activation instruction is used to instruct activation of the sixth CA combination; In response to the second activation instruction, the sixth CA combination is activated.

5. The method according to claim 4, characterized in that After receiving the first configuration message, the method further includes: In response to the first configuration message, verification of the fifth CA combination protocol fails, and verification of the sixth CA combination protocol succeeds.

6. The method according to any one of claims 1 to 5, characterized in that The first configuration message includes a seventh RRC connection reconfiguration message; The first configuration completion message includes a seventh RRC connection reconfiguration completion message.

7. The method according to claim 6, characterized in that The CA combination supported by the terminal further includes a first CA combination and a second CA combination; before receiving the first configuration message, the method includes: receiving a first RRC connection reconfiguration message, where the first RRC connection reconfiguration message includes a third CA combination; the first RRC connection reconfiguration message is used to configure the third CA combination for the terminal; When the third CA combination is not supported by the terminal, sending a first update request; the first update request is used to trigger the first access network device to query the frequency band and CA combination supported by the terminal; Receiving a first query message; the first query message is used to query the frequency band and CA combination supported by the terminal; In response to the first query message, first capability information is sent; the first capability information does not include a fourth CA combination, and the fourth CA combination includes the first CA combination or the third CA combination; The frequency band indicated by the first CA combination includes a first frequency band; The frequency band indicated by the third CA combination includes a third frequency band; The first frequency band and the third frequency band are different frequency bands of the same frequency band.

8. The method according to claim 7, characterized in that The first update request comprises a first tracking area update request; The first query message includes a first terminal capability query message; The first capability information includes first terminal capability information.

9. The method according to claim 7 or 8, characterized in that: The third CA combination is not supported by the terminal including: The third CA combination includes a frequency band not supported by the terminal; Or the third CA combination is included in the CA combinations not supported by the terminal.

10. The method according to claim 9, characterized in that The terminal supports the first frequency band but does not support the third frequency band; The first capability information does not yet include a fourth frequency band; the fourth frequency band includes the first frequency band or the third frequency band.

11. The method according to claim 7 or 10, characterized in that: The first capability information includes the second CA combination; after sending the first capability information, the method further includes: A second RRC connection reconfiguration message is received, where the second RRC connection reconfiguration message includes the second CA combination.

12. The method according to claim 7 or 10, characterized in that: After sending the first capability information, the method further includes: receiving a third RRC connection reconfiguration message, where the third RRC connection reconfiguration message includes the third CA combination; In response to the third RRC connection reconfiguration message, verifying the third CA combination protocol fails; Sending a second tracking area update request; the second tracking area update request is used to trigger the first access network device to query the frequency band and CA combination supported by the terminal; receiving a second terminal capability query message; the second terminal capability query message is used to instruct the terminal to report supported frequency bands and CA combinations; In response to the second terminal capability query message, second terminal capability information is sent; the second terminal capability information does not include the second CA combination and the fourth CA combination.

13. The method according to claim 7 or 8, characterized in that: The terminal supports the first frequency band but does not support the third frequency band; After sending the first capability information, the method further includes: receiving a fourth RRC connection reconfiguration message, where the fourth RRC connection reconfiguration message includes the third CA combination; In response to the fourth RRC connection reconfiguration message, verifying the third CA combination protocol fails; Sending a third tracking area update request; the third tracking area update request is used to trigger the first access network device to query the frequency band and CA combination supported by the terminal; receiving a third terminal capability query message; the third terminal capability query message is used to instruct the terminal to report supported frequency bands and CA combinations; In response to the third terminal capability query message, third terminal capability information is sent; the third terminal capability information does not include a fourth frequency band and the fourth CA combination; the fourth frequency band includes the first frequency band or the third frequency band.

14. The method according to claim 13, characterized in that The third terminal capability information includes the second CA combination; After sending the third terminal capability information, the method further includes: A fifth RRC connection reconfiguration message is received, where the fifth RRC connection reconfiguration message includes the second CA combination.

15. The method according to claim 13, characterized in that After sending the third terminal capability information, the method further includes: receiving a sixth RRC connection reconfiguration message, wherein the sixth RRC connection reconfiguration message includes the third CA combination; In response to the sixth RRC connection reconfiguration message, verifying the third CA combination protocol fails; Sending a fourth tracking area update request; the fourth tracking area update request is used to trigger the first access network device to query the frequency band and CA combination supported by the terminal; receiving a fourth terminal capability query message; the fourth terminal capability query message is used to instruct the terminal to report supported frequency bands and CA combinations; In response to the fourth terminal capability query message, fourth terminal capability information is sent; the fourth terminal capability information does not include the second CA combination and the fourth CA combination.

16. The method according to claim 7 or 8, characterized in that The first capability information does not yet include the second CA combination.

17. The method according to claim 7 or 8, characterized in that After sending the first capability information, the method further includes: Receiving a first tracking area update accept message; Send a first tracking area update complete message.

18. The method according to claim 7 or 8, characterized in that Before receiving the first RRC connection reconfiguration message, the method further includes: Sending a first attachment request; the first attachment request is used to trigger the first access network device to query the frequency band and CA combination supported by the terminal; receiving a fifth terminal capability query message; the fifth terminal capability query message is used to instruct the terminal to report supported frequency bands and CA combinations; In response to the fifth terminal capability query message, fifth terminal capability information is sent; the fifth terminal capability information includes a fourth frequency band, the second CA combination and the fourth CA combination; the fourth frequency band includes the first frequency band or the third frequency band.

19. A terminal, characterized in that: The terminal comprises: a memory and one or more processors; the memory and the processor are coupled; The memory is used to store computer program codes, and the computer program codes include computer instructions. When the processor executes the computer instructions, the terminal executes the method according to any one of claims 1 to 18.

20. A chip system, characterized in that: The chip system includes a processor and a communication interface; the processor is used to call and run a computer program stored in a storage medium from the storage medium to execute the method as described in any one of claims 1-18.

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