Communication methods and devices

Abstract

A communication method and apparatus, relating to the field of communication technology, are used to reduce the probability of a terminal device disconnecting from a 4G network and improve the communication stability of the terminal device when the EN-DC frequency band combination issued by the network device does not match the EN-DC frequency band combination supported by the terminal device. The method includes: the terminal device sending capability information to a first network device, the capability information indicating a first EN-DC frequency band combination, the first EN-DC frequency band combination being an EN-DC frequency band combination supported by the terminal device; the terminal device receiving an RRC reconfiguration message sent by the first network device, the RRC reconfiguration message indicating a second EN-DC frequency band combination, the second EN-DC frequency band combination being an EN-DC frequency band combination configured for use by the terminal device; and when the second EN-DC frequency band combination does not match the first EN-DC frequency band combination, the terminal device sending secondary cell group failure information to the first network device.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a communication method and apparatus. Background Technology

[0002] With the rapid development of mobile internet, 5G networks have emerged to better meet people's demands for faster and more bandwidth wireless networks providing data transmission channels. However, due to the significant challenges and costs associated with building 5G base stations, most 5G base stations have not yet been installed. Furthermore, considering the widespread adoption of 4G networks and user acceptance, operators are currently using non-standalone (NSA) networking to accelerate the deployment of 5G networks.

[0003] NSA networking employs a 4G-5G dual connectivity (EN-DC) approach, anchoring the 5G New Radio (NR) control plane to the 4G Long Term Evolution (LTE) core network. The 5G NR is used to carry user plane services. The control plane is the channel used to send and schedule signaling required for resources, while the user plane is the channel for transmitting user data. Due to the unique nature of EN-DC, close cooperation between terminal equipment and base stations is necessary to provide normal, high-quality data services; otherwise, network compatibility issues are more likely to be exposed.

[0004] For example, during NSA network access, the terminal device can report the EN-DC frequency band combinations it supports to the 4G base station. Then, the 4G base station sends the EN-DC frequency band combinations to the terminal device to configure it to activate carrier aggregation (CA), enabling the terminal device to enter dual-connectivity mode.

[0005] However, in some cases, the EN-DC frequency band combination assigned by the 4G base station does not match the EN-DC frequency band combination supported by the terminal device, preventing the terminal device from using the EN-DC frequency band combination assigned by the 4G base station. In this situation, according to existing communication protocols, the terminal device will initiate a radio resource control (RRC) re-establishment procedure. The RRC re-establishment procedure initiated by the terminal device may be rejected by the network side, or the RRC re-establishment procedure may fail, causing the terminal device to disconnect from the 4G network and affecting the normal communication of the terminal device. Summary of the Invention

[0006] This application provides a communication method to reduce the probability of a terminal device disconnecting from the 4G network and improve the communication stability of the terminal device when the EN-DC frequency band combination issued by the network device does not match the EN-DC frequency band combination supported by the terminal device.

[0007] In a first aspect, a communication method is provided, comprising: a terminal device sending capability information to a network device, the capability information indicating a first EN-DC frequency band combination; the terminal device receiving an RRC reconfiguration message sent by the network device, the RRC reconfiguration message indicating a second EN-DC frequency band combination; and, if the second EN-DC frequency band combination does not match the first EN-DC frequency band combination, the terminal device sending secondary cell group failure information to the network device.

[0008] Based on the above technical solution, when the first EN-DC frequency band combination does not match the second EN-DC frequency band combination, the terminal device sends a secondary cell group failure message to the first network device to indicate that the EN-DC configuration has failed, while avoiding triggering the RRC re-establishment process. In this way, since the RRC re-establishment process is not triggered, the connection between the terminal device and the first network device can be maintained, thereby ensuring normal communication between the terminal device and the first network device.

[0009] In one possible design, the mismatch between the second EN-DC band combination and the first EN-DC band combination includes at least one of the following situations: the frequency bands in the second EN-DC band combination do not match the frequency bands in the first EN-DC band combination; or, the bandwidth in the second EN-DC band combination does not match the bandwidth in the first EN-DC band combination; or, the maximum number of carrier units in the second EN-DC band combination does not match the maximum number of carrier units in the first EN-DC band combination; or, the multi-input multi-output (MIMO) capability in the second EN-DC band combination does not match the MIMO capability in the first EN-DC band combination; or, the frequency points in the second EN-DC band combination do not match the frequency points in the first EN-DC band combination.

[0010] In one possible design, before the terminal device sends capability information to the network device, the method further includes: the terminal device receiving capability query information sent by the network device, the capability query information being used to request the terminal device to report capability information.

[0011] In one possible design, before the terminal device receives the RRC reconfiguration message sent by the network device, the method further includes: the terminal device receiving measurement configuration information sent by the network device; and the terminal device sending a measurement report to the network device. Based on this design, the network side can select a suitable base station as a secondary node for the terminal device based on the measurement report reported by the terminal device.

[0012] In one possible design, the terminal device receives an RRC reconfiguration message sent by the network device, including: the terminal device receiving the RRC reconfiguration message from the network device via SRB1.

[0013] In one possible design, the method further includes: the terminal device sending an RRC reconfiguration complete message to the network device. Based on this design, it can prevent the network side from mistakenly assuming that the terminal device is malfunctioning if it does not receive a response to the RRC reconfiguration message from the terminal device for an extended period.

[0014] In one possible design, the network equipment supports the 4G communication standard.

[0015] In a second aspect, a communication method is provided, comprising: a network device receiving capability information from a terminal device, the capability information being used to indicate a first EN-DC frequency band combination; the network device sending an RRC reconfiguration message to the terminal device, the RRC reconfiguration message being used to indicate a second EN-DC frequency band combination; and, if the second EN-DC frequency band combination does not match the first EN-DC frequency band combination, the network device receiving secondary cell group failure information from the terminal device.

[0016] In one possible design, the mismatch between the second EN-DC band combination and the first EN-DC band combination includes at least one of the following situations: the frequency bands in the second EN-DC band combination do not match the frequency bands in the first EN-DC band combination; or, the bandwidth in the second EN-DC band combination does not match the bandwidth in the first EN-DC band combination; or, the maximum number of carrier units in the second EN-DC band combination does not match the maximum number of carrier units in the first EN-DC band combination; or, the MIMO capability in the second EN-DC band combination does not match the MIMO capability in the first EN-DC band combination; or, the frequency points in the second EN-DC band combination do not match the frequency points in the first EN-DC band combination.

[0017] In one possible design, before the network device receives capability information from the terminal device, the method further includes: the network device sending capability query information to the terminal device, the capability query information being used to request the terminal device to report capability information.

[0018] In one possible design, before the network device sends an RRC reconfiguration message to the terminal, the method further includes: the network device sending measurement configuration information to the terminal device; and the network device receiving a measurement report from the terminal device.

[0019] In one possible design, the network device sends an RRC reconfiguration message to the terminal device, including: the network device sending an RRC reconfiguration message to the terminal device via SRB1.

[0020] In one possible design, the method further includes: the network device receiving an RRC reconfiguration complete message from the terminal device.

[0021] In one possible design, the network equipment supports the 4G communication standard.

[0022] Thirdly, a communication device is provided, comprising: a processing module and a communication module; the communication module is configured to send capability information to a network device, the capability information indicating a first EN-DC frequency band combination; and receive an RRC reconfiguration message sent by the network device, the RRC reconfiguration message indicating a second EN-DC frequency band combination; the processing module is configured to determine that the second EN-DC frequency band combination does not match the first EN-DC frequency band combination; the communication module is further configured to send secondary cell group failure information to the network device when the processing module determines that the second EN-DC frequency band combination does not match the first EN-DC frequency band combination.

[0023] In one possible design, the mismatch between the second EN-DC band combination and the first EN-DC band combination includes at least one of the following situations: the frequency bands in the second EN-DC band combination do not match the frequency bands in the first EN-DC band combination; or, the bandwidth in the second EN-DC band combination does not match the bandwidth in the first EN-DC band combination; or, the maximum number of carrier units in the second EN-DC band combination does not match the maximum number of carrier units in the first EN-DC band combination; or, the MIMO capability in the second EN-DC band combination does not match the MIMO capability in the first EN-DC band combination; or, the frequency points in the second EN-DC band combination do not match the frequency points in the first EN-DC band combination.

[0024] In one possible design, the communication module is also used to receive capability query information sent by the network device, which is used to request the reporting of capability information.

[0025] In one possible design, the communication module is also used to receive measurement configuration information sent by the network device and to send measurement reports to the network device.

[0026] In one possible design, the communication module is used to receive RRC reconfiguration messages sent by the network device, including: receiving RRC reconfiguration messages from the network device via SRB1.

[0027] In one possible design, the communication module is also used to send an RRC reconfiguration complete message to the network device.

[0028] In one possible design, the network equipment supports the 4G communication standard.

[0029] Fourthly, a communication device is provided, including a communication module and a processing module. The communication module is configured to receive capability information from a terminal device, the capability information indicating a first EN-DC frequency band combination; the processing module is configured to generate an RRC reconfiguration message, the RRC reconfiguration message indicating a second EN-DC frequency band combination; the communication module is also configured to send the RRC reconfiguration message to the terminal device; and, in the event that the second EN-DC frequency band combination does not match the first EN-DC frequency band combination, to receive secondary cell group failure information from the terminal device.

[0030] In one possible design, the mismatch between the second EN-DC band combination and the first EN-DC band combination includes at least one of the following situations: the frequency bands in the second EN-DC band combination do not match the frequency bands in the first EN-DC band combination; or, the bandwidth in the second EN-DC band combination does not match the bandwidth in the first EN-DC band combination; or, the maximum number of carrier units in the second EN-DC band combination does not match the maximum number of carrier units in the first EN-DC band combination; or, the MIMO capability in the second EN-DC band combination does not match the MIMO capability in the first EN-DC band combination; or, the frequency points in the second EN-DC band combination do not match the frequency points in the first EN-DC band combination.

[0031] In one possible design, the communication module is also used to send capability query information to the terminal device, which requests the terminal device to report capability information.

[0032] In one possible design, the communication module is also used to send measurement configuration information to the terminal device and receive measurement reports from the terminal device.

[0033] In one possible design, the communication module is used to send RRC reconfiguration messages to the terminal device, including sending RRC reconfiguration messages to the terminal device via SRB1.

[0034] In one possible design, the communication module is also used to receive an RRC reconfiguration complete message from the terminal device.

[0035] In one possible design, the communication device is applied to the network equipment, which supports the 4G communication standard.

[0036] Fifthly, a communication device is provided, comprising a processor and a transceiver, the processor and transceiver being used to implement any one of the methods provided in the first or second aspect above. The processor is used to perform processing actions in the corresponding method, and the transceiver is used to perform receiving / transmitting actions in the corresponding method.

[0037] In a sixth aspect, a computer-readable storage medium is provided that stores computer instructions that, when executed on a computer, cause the computer to perform any one of the methods provided in the first or second aspect.

[0038] In a seventh aspect, a computer program product carrying computer instructions is provided, which, when executed on a computer, causes the computer to perform any one of the methods provided in the first or second aspect.

[0039] Eighthly, a chip is provided, comprising: a processing circuit and transceiver pins, the processing circuit and transceiver pins being used to implement the methods provided in the first or second aspect above. The processing circuit is used to perform processing actions in the corresponding method, and the transceiver pins are used to perform receiving / transmitting actions in the corresponding method.

[0040] It should be noted that the technical effects of any of the designs in the third to eighth aspects mentioned above can be found in the technical effects of the corresponding designs in the first or second aspects, and will not be repeated here. Attached Figure Description

[0041] Figure 1 A schematic diagram of a dual-connection architecture provided in an embodiment of this application;

[0042] Figure 2 This is a schematic diagram of another dual-connection architecture provided in an embodiment of this application;

[0043] Figure 3 This is a schematic diagram of another dual-connection architecture provided in an embodiment of this application;

[0044] Figure 4 A flowchart illustrating a dual-connection method provided in this application embodiment;

[0045] Figure 5 A schematic diagram of the hardware structure of a terminal device and a network device provided in an embodiment of this application;

[0046] Figure 6 A flowchart illustrating a communication method provided in an embodiment of this application;

[0047] Figure 7 A flowchart illustrating another communication method provided in an embodiment of this application;

[0048] Figure 8 A flowchart illustrating another communication method provided in an embodiment of this application;

[0049] Figure 9 This is a schematic diagram of the structure of a communication device provided in an embodiment of this application. Detailed Implementation

[0050] In the description of this application, unless otherwise stated, " / " means "or," for example, A / B can mean A or B. The "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. Furthermore, "at least one" means one or more, and "multiple" means two or more. The terms "first," "second," etc., do not limit the quantity or order of execution, and "first," "second," etc., do not necessarily imply differences.

[0051] It should be noted that, in this application, the terms "exemplary" or "for example" are used to indicate that something is being described as an example, illustration, or illustration. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or design solutions. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0052] The following is a brief introduction to the technical terms used in this application to facilitate the understanding of the solution by those skilled in the art.

[0053] 1. Dual connection

[0054] In the field of wireless communication technology, dual connectivity (DC) technology has been introduced to improve user throughput. DC can support two or more base stations to simultaneously provide data transmission services to a single terminal device. These base stations include a master node (MN) and one or more secondary nodes (SN).

[0055] The master node is connected to the core network (CN) via the S1 / NG interface. The connection between the master node and the core network includes at least a control plane connection and may also include a user plane connection. The S1 interface includes S1-U and S1-C. The NG interface includes NG-U and NG-C. S1-U / NG-U represents the user plane connection, and S1-C / NG-C represents the control plane connection.

[0056] The secondary node may or may not have a user plane connection with the core network. When there is no user plane connection between the secondary node and the core network, the data from the terminal device can be offloaded to the secondary node by the primary node at the Packet Data Convergence Protocol (PDCP) layer. This primary node can also be referred to as the primary base station or primary access network device, and the SN can be referred to as the secondary base station or secondary access network device.

[0057] In a dual-connectivity scenario, the master node manages a primary cell (PCell). The primary cell refers to the cell deployed on the primary frequency and accessed during the initial connection establishment process or RRC connection re-establishment process initiated by the terminal device, or the cell designated as the primary cell during handover.

[0058] Furthermore, in addition to the primary cell, the master node can also manage one or more secondary cells (SCells). The cells under the master node that provide services to terminal devices, such as the primary cell and the secondary cells under the master node, can be collectively referred to as the master cell group (MCG).

[0059] A secondary node manages a primary secondary cell (PSCell). The primary and secondary cells can be cells accessed by terminal devices during random access to the secondary node, cells on another secondary node where the terminal device skips the random access process to initiate data transmission during secondary node changes, or cells on a secondary node accessed during random access when performing a synchronization reconfiguration process.

[0060] Furthermore, in addition to primary and secondary cells, secondary nodes can also manage one or more secondary cells. The cells on a secondary node that provide services to terminal devices, such as primary and secondary cells and secondary cells on the secondary node, can be collectively referred to as SCG.

[0061] For ease of description, in the NR protocol, the primary cell and the primary and secondary cells are collectively referred to as special cells (SpCell).

[0062] Depending on the communication standards supported by the master node and the slave node, a dual-connectivity network can be implemented in various ways, as illustrated below.

[0063] like Figure 1 The diagram shows a schematic of an LTE-NR dual connectivity (EUTRA-NR dual connectivity, EN-DC) network. The EN-DC network is a dual connectivity network between the 4G radio access network and 5G NR, with the LTE base station (LTE eNB) acting as the MN and the NR base station (NRgNB) acting as the SN. Figure 1 As shown in (a), the LTE eNB has an S1 interface with the evolved Packet Core (EPC) of the LTE system, providing at least a control plane connection and potentially a user plane connection. Figure 1 As shown in (b), there is an S1-U interface between the NR gNB and the EPC, meaning that only user plane connections are allowed.

[0064] like Figure 2 The diagram illustrates an NR-LTE Dual Connectivity (NR-E-UTRA Dual Connectivity, NE-DC) network. The NE-DC network is a dual-connectivity network between the 4G radio access network and 5G NR under the 5G core network. The NR base station (gNB) acts as the MN, and the LTE base station (ng-eNB) acts as the SN, with both the MN and SN connected to the 5G core network (5th Generation Core Network, 5GC). Figure 2 As shown in (a), there is an NG interface between the gNB and the 5GC, which can establish control plane and user plane connections for terminal devices. The ng-eNB sends user plane data to the 5GC through the gNB. Figure 2 As shown in (b), there is an NG-U interface between ng-eNB and 5GC, which is only used to establish a user plane connection for terminal devices. ng-eNB directly sends user plane data to 5GC.

[0065] like Figure 3 The diagram illustrates a 5G core network LTE-NR dual connectivity (Next Generation E-UTRA-NR DualConnectivity, NGEN-DC) network. The NGEN-DC network is a dual-connectivity network between the 4G radio access network and 5G NR within the 5G core network. The LTE base station (ng-eNB) acts as the MN, and the NR base station (gNB) acts as the SN, with both the MN and SN connected to the 5GC. Figure 3 As shown in (a), there is an NG interface between the ng-eNB and the 5GC, which can establish control plane and user plane connections for terminal devices. The gNB sends user plane data to the 5GC through the ng-eNB. Figure 3 As shown in (b), there is an NG-U interface between gNB and 5GC, which is only used to establish a user plane connection for terminal devices. gNB directly sends user plane data to 5GC.

[0066] exist Figures 1 to 3 In a dual-connectivity network, the SN and the core network may not establish a user plane connection. Instead, data can be transmitted via the MN. For example, in the downlink direction, the data from the terminal device arrives at the MN first. The MN then offloads the data from the terminal device to the SN at the PDCP layer. The offloaded data can be in the form of, for example, PDCP protocol data units (PDUs).

[0067] 2. Dual connection establishment process

[0068] like Figure 4 As shown, the EN-DC dual-connection establishment process in related technologies includes the following steps:

[0069] S100, terminal equipment registers to the LTE network.

[0070] S101 and eNB decide to add gNB as a secondary node.

[0071] S102, the eNB sends a secondary node addition request message to the gNB.

[0072] Among them, the auxiliary node adds a request message to request the gNB to act as an auxiliary node for the terminal device.

[0073] Optionally, the secondary node add request message can carry RRC and radio bearer configuration.

[0074] Optionally, the secondary node can also carry information related to the terminal device's functions and security in the request message.

[0075] S103, gNB sends a confirmation message to eNB requesting the addition of a secondary node.

[0076] The auxiliary node add request confirmation message is used to respond to the auxiliary node add request message.

[0077] S104, the eNB sends an RRC reconfiguration message to the terminal device.

[0078] Among them, the RRC reconfiguration message is used to configure the 5G radio bearer for the terminal device.

[0079] S105, Terminal equipment accesses 5G cell.

[0080] S106. The terminal device sends an RRC reconfiguration complete message to the eNB.

[0081] S107, the eNB sends a secondary node reconfiguration completion message to the gNB.

[0082] based on Figure 4 The process shown demonstrates how the terminal device establishes the EN-DC dual connection.

[0083] 3. Signaling Radio Bearer (SRB)

[0084] SRBs are used to transmit RRC messages and NAS messages. SRBs can be categorized as follows:

[0085] (1) SRB0 is established on the common control channel (CCCH) and is used to transmit RRC messages.

[0086] (2) SRB1 is built on a dedicated control channel (DCCH) and is mainly used to transmit RRC messages. It can also be used to transmit NAS messages in an embedded manner along with RRC messages.

[0087] (3) SRB2, after the security mode is completed, is established on DCCH to transmit NAS messages in a reliable and secure manner.

[0088] (4) SRB3, established on DCCH, is used to transmit RRC messages between terminal equipment and gNB as a secondary base station in EN-DC scenario.

[0089] 4. Frequency band

[0090] In the field of communication technology, a frequency band refers to the range of electromagnetic waves. For example, Table 1 shows the 3GPP specifications for the operating frequency bands of E-UTRA.

[0091] Table 1

[0092]

[0093] For example, in the following text, the frequency band numbers of 4G networks begin with "B", such as B20, which represents the frequency band with frequency band number 20 in the 4G network. The frequency band numbers of 5G networks begin with "N", such as N78, which represents the frequency band with frequency band number 78 in the 5G network.

[0094] 5. Frequency

[0095] A frequency point refers to the center frequency of a frequency band (or sub-band). It should be understood that, regardless of whether it's E-UTRA or NR, an operating frequency band can be divided into multiple sub-bands, and a sub-band can be called a component carrier (CC). In the frequency domain, a carrier cell can be considered a cell.

[0096] For example, the following describes how frequency points are calculated in E-UTRA.

[0097] For the uplink band, F UL =F UL_low +0.1(N UL -N offs-UL ). Among them, F UL For the uplink frequency band, F UL_low N is the minimum uplink frequency of the E-UTRA operating band in which this uplink band is located. UL N is the frequency number of this uplink band. offs-UL This is the lowest uplink frequency point number of the E-UTRA operating frequency band where the uplink frequency band is located.

[0098] For the downlink frequency band, F DL =F DL_low +0.1(N DL -N offs-DL ). Among them, F DL For the downlink frequency band, F DL_low N is the minimum downlink frequency of the E-UTRA operating band in which this downlink band is located. DL N is the frequency number of this downlink band. offs-DL This is the lowest downlink frequency number of the E-UTRA operating band in which this downlink frequency band is located.

[0099] 6. Carrier aggregation (CA)

[0100] Carrier aggregation refers to combining two or more carrier units together to support greater transmission bandwidth.

[0101] Carrier aggregation can be categorized into intra-band carrier aggregation and inter-band carrier aggregation. Intra-band carrier aggregation is further divided into contiguous and non-contiguous types.

[0102] For intra-band contiguous CA, the CA bandwidth class indicates the aggregated transmission bandwidth configuration (ATBC) and the maximum number of consecutive CCs.

[0103] For example, Table 2 shows the meaning of different values ​​for the CA bandwidth level.

[0104] Table 2

[0105] CA Bandwidth Class ATBC Maximum number of consecutive CCs A ATBC≤100MHz 1 B ATBC = 25MHz 2

[0106] C 100MHz<ATBC≤200MHz 2 D 200MHz<ATBC≤300MHz 3 …… …… ……

[0107] The above is an introduction to the terminology involved in the embodiments of this application, which will be uniformly explained here and will not be repeated below.

[0108] The communication method provided in this application can be applied to EN-DC dual-connection scenarios or other DC scenarios. This application does not limit the specific architecture of the dual-connection network to which this communication method is adapted. The following embodiments mainly use the EN-DC dual-connection scenario as an example to illustrate the communication method provided in this application.

[0109] In this application embodiment, the terminal device is a device with wireless transceiver capabilities. The terminal device can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; it can also be deployed on water (such as on ships); and it can be deployed in the air (such as on airplanes, balloons, and satellites). The terminal device can be user equipment (UE). The UE includes handheld devices, vehicle-mounted devices, wearable devices, or computing devices with wireless communication capabilities. For example, the UE can be a mobile phone, tablet computer, or computer with wireless transceiver capabilities. The terminal device can also be a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in autonomous driving, a wireless terminal device in telemedicine, a wireless terminal device in a smart grid, a wireless terminal device in a smart city, a wireless terminal device in a smart home, and so on. In this application embodiment, the means for implementing the functions of the terminal device can be the terminal device itself, or it can be a means that supports the terminal device in implementing the functions, such as a chip system. In this embodiment of the application, the chip system may be composed of chips or may include chips and other discrete devices.

[0110] In this application embodiment, the network device includes, but is not limited to: access points (APs) in a wireless fidelity (WiFi) system, such as home gateways, routers, servers, switches, bridges, etc.; evolved Node Bs (eNBs), radio network controllers (RNCs), Node Bs (NBs), base station controllers (BSCs), base transceiver stations (BTSs), home base stations (e.g., home evolved Node Bs, or home Node Bs (HNBs)); baseband units (BBUs); wireless relay nodes, wireless backhaul nodes, transmission and reception points (TRPs) or transmission points (TPs), etc. It can also be a 5G system, such as a gNB in ​​a new radio (NR) system, or a transmission point (TRP or TP), one or a group of antenna panels (including multiple antenna panels) of a base station in a 5G system, or it can be a network node constituting a gNB or transmission point, such as a baseband unit (eNB). Unit (BBU), or distributed unit (DU), roadside unit (RSU) with base station function, etc.

[0111] Optionally, the network device can adopt a centralized unit (CU)-DU architecture. That is, the network device can consist of a CU and at least one DU. In this case, some functions of the network device are deployed on the CU, and other functions are deployed on the DU. The CU and DU are functionally separated according to the protocol stack. As one implementation, the CU deploys the RRC layer, PDCP layer, and Service Data Adaptation Protocol (SDAP) layer from the protocol stack; the DU deploys the radio link control (RLC) layer, media access control (MAC) layer, and physical layer (PHY) layer from the protocol stack. Thus, the CU has the processing capabilities of RRC, PDCP, and SDAP. The DU has the processing capabilities of RLC, MAC, and PHY. It is understood that the above functional separation is only an example and does not constitute a limitation on the CU and DU. That is to say, there can be other ways of functional separation between the CU and DU, which will not be elaborated here in the embodiments of this application.

[0112] For example, Figure 5 This is a schematic diagram of the hardware structure of the network device and terminal device provided in the embodiments of this application.

[0113] The terminal device includes at least one processor 101 and at least one transceiver 103. Optionally, the terminal device may also include an output device 104, an input device 105, and at least one memory 102.

[0114] Processor 101, memory 102, and transceiver 103 are connected via a bus. Processor 101 can be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits used to control the execution of the program according to this application. Processor 101 may also include multiple CPUs, and processor 101 can be a single-core processor or a multi-core processor. Here, processor can refer to one or more devices, circuits, or processing cores used to process data (e.g., computer program instructions).

[0115] The memory 102 may be a read-only memory (ROM) or other type of static storage device capable of storing static information and instructions, random access memory (RAM) or other type of dynamic storage device capable of storing information and instructions, or it may be an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer. This application embodiment does not impose any limitations on this. The memory 102 may exist independently and be connected to the processor 101 via a bus. The memory 102 may also be integrated with the processor 101. The memory 102 is used to store the application code that executes the scheme of this application and is controlled by the processor 101 for execution. The processor 101 is used to execute computer program code stored in the memory 102, thereby implementing the method provided in the embodiments of this application.

[0116] Transceiver 103 can be any transceiver-like device used for communicating with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc. Transceiver 103 includes a transmitter Tx and a receiver Rx.

[0117] Output device 104 communicates with processor 101 and can display information in various ways. For example, output device 104 can be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector, etc. Input device 105 communicates with processor 101 and can receive user input in various ways. For example, input device 105 can be a mouse, keyboard, touch screen device, or sensing device, etc.

[0118] The network device includes at least one processor 201, at least one memory 202, at least one transceiver 203, and at least one network interface 204. The processor 201, memory 202, transceiver 203, and network interface 204 are connected via a bus. The network interface 204 is used to connect to core network equipment via a link, or to the network interfaces of other network devices via wired or wireless links (not shown in the figure), and this embodiment does not specifically limit its use. Furthermore, the relevant descriptions of the processor 201, memory 202, and transceiver 203 can be found in the description of the processor 101, memory 102, and transceiver 103 in the terminal device, and will not be repeated here.

[0119] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0120] like Figure 6 The image shows a communication method provided in an embodiment of this application. The method includes the following steps:

[0121] S201. The first network device sends an RRC reconfiguration message to the terminal device. Correspondingly, the terminal device receives the RRC reconfiguration information sent by the first network device. The RRC reconfiguration information includes the second EN-DC frequency band combination.

[0122] Optionally, the first network device supports the 4G communication standard. For example, the first network device may be an eNB.

[0123] In this embodiment, the second EN-DC band combination is an EN-DC band combination configured for use by the terminal device. Exemplarily, the EN-DC band combination includes EUTRA parameters and NR parameters. The EUTRA parameters are used to configure the EUTRA band. The NR parameters are used to configure the NR band.

[0124] The EUTRA parameter is used to configure one or more of the following parameters: MIMO capability, maximum number of CCs, frequency band, frequency point, and bandwidth. The NR parameter is used to configure one or more of the following parameters: MIMO capability, maximum number of CCs, frequency band, frequency point, and bandwidth.

[0125] MIMO (Multiple-Input Multiple-Output) refers to using multiple transmit and receive antennas at both the transmitting and receiving ends, allowing signals to be transmitted through these antennas, thereby improving communication quality or increasing data transmission volume. Optionally, MIMO capability can be characterized by the number of layers, which represents the number of different data streams transmitted in parallel. For example, MIMO capability can have 2 layers, 4 layers, 8 layers, etc., without limitation.

[0126] Optionally, MIMO capability can be further divided into uplink MIMO capability and downlink MIMO capability. Uplink MIMO capability and downlink MIMO capability can also be configured differently. For example, the current protocol specifies a maximum uplink MIMO capability of 4 layers and a maximum downlink MIMO capability of 8 layers.

[0127] Optionally, EUTRA parameters may include a CA bandwidth level to indicate the maximum number of CCs and bandwidth in the EUTRA band. NR parameters may include a CA bandwidth level to indicate the maximum number of CCs and bandwidth in the NR band. The CA bandwidth level is described above and will not be repeated here.

[0128] In one possible implementation, the terminal device registers with the network through a first network device, and an SRB1 is established between the terminal device and the first network device. The first network device sends an RRC reconfiguration message to the terminal device through the SRB1, and the RRC reconfiguration message includes a second EN-DC frequency band combination.

[0129] Optionally, before step S201, the first network device sends measurement configuration information to the terminal; the terminal device performs cell measurement based on the measurement configuration information; the first network device can receive a measurement report from the terminal device and, based on the measurement report, determines the second network device as the secondary node of the terminal device. Alternatively, the first network device can blindly configure the second network device as the secondary node of the terminal device even without receiving a measurement report from the terminal device. Afterwards, the first network device can send a secondary node add request message to the second network device. The first network device receives a secondary node add request confirmation message from the second network device. The specific details of the secondary node add request message and the secondary node add request confirmation message can be found in the preceding description and will not be repeated here.

[0130] Optionally, before step S201, the terminal device may have already established an EN-DC connection. That is, the terminal device establishes connections with both the first network device and the second network device. The first network device may execute step S201 according to the actual situation (e.g., if the SCG configuration needs to be modified).

[0131] Optionally, the second network device supports the 5G communication standard. For example, the second network device can be a gNB.

[0132] S202. The terminal equipment is determined to be unable to comply with the second EN-DC frequency band combination.

[0133] For example, step S202 can be implemented as: the terminal device cannot comply with at least one parameter included in the EUTRA parameter of the second EN-DC band combination, and / or the terminal device cannot comply with at least one parameter included in the NR parameter of the second EN-DC band combination.

[0134] Optionally, "cannot comply" can be replaced with other descriptions, such as "cannot be supported", without restriction.

[0135] S203. The terminal device sends a secondary cell group failure information (SCG failure information) to the first network device. Correspondingly, the first network device receives the secondary cell group failure information sent by the terminal device.

[0136] The secondary cell group failure information is used to indicate that adding a secondary cell group has failed.

[0137] Optionally, the secondary cell group failure information may also include the failure type. The failure type may also have other names, such as failure reason or fault reason, and there are no restrictions on this.

[0138] It should be understood that when a terminal device sends a secondary cell group failure message to the first network device to trigger the network side to release / change the secondary cell group, it does not affect the connection between the terminal device and the first network device. That is, after the terminal device sends the secondary cell group failure message to the first network device, the terminal device remains in a connected state in the 4G network, thereby ensuring that the terminal device's relevant services (such as VoLTE services or data services) in the 4G network can be processed normally.

[0139] Optionally, after step S203, the first network device may also send an RRC reconfiguration message to the terminal device. The RRC reconfiguration message may be used to indicate whether to keep, change, or release the secondary cell group.

[0140] based on Figure 6 In the illustrated embodiment, during the EN-DC configuration process, if the second EN-DC frequency band combination configured by the first terminal device cannot be complied with by the terminal device, the terminal device sends a secondary cell group failure message to the first network device to indicate that the EN-DC configuration has failed, while avoiding triggering the RRC re-establishment process. In this way, since the RRC re-establishment process is not triggered, the connection between the terminal device and the first network device can be maintained, thereby ensuring normal communication between the terminal device and the first network device.

[0141] Optional, based on Figure 6 The illustrated embodiments, such as Figure 7 As shown, the communication method may further include step S204 after step S202.

[0142] S204. The terminal device sends an RRC reconfiguration complete message to the first network device. Correspondingly, the first network device receives the RRC reconfiguration complete message from the terminal device.

[0143] The RRC reconfiguration complete message indicates that the RRC reconfiguration is complete.

[0144] Optionally, the execution order between steps S204 and S203 is not limited in the embodiments of this application.

[0145] For example, if the terminal device has not established an EN-DC before step S201, step S204 can be executed first, followed by step S203. It should be understood that the terminal device not establishing an EN-DC indicates that the terminal device has not established an SCG. Therefore, the terminal device first sends an RRC reconfiguration completion message to the first network device, allowing the network side to know that the SCG has been successfully established. Afterwards, the terminal device sends a secondary cell group failure message to the first network device to trigger the network side to execute the SCG release / change procedure.

[0146] For example, if the terminal device has already established EN-DC before step S201, step S203 can be executed first, followed by step S204.

[0147] Based on step S204, the terminal device sends an RRC reconfiguration complete message to the first network device to complete the RRC reconfiguration process between the terminal device and the first network device normally. This avoids the first network device misinterpreting the terminal device as malfunctioning due to a prolonged lack of response to the RRC reconfiguration message from the terminal device.

[0148] The following section explains the terminal device capability reporting process in detail. Figure 6 The illustrated embodiment.

[0149] like Figure 8 The image shows a communication method provided in an embodiment of this application. The method includes the following steps:

[0150] S301 (optional): The first network device sends a capability enquiry message to the terminal device. Correspondingly, the terminal device receives the capability enquiry message from the first network device.

[0151] Among them, the capability query information is used to request capability information from the terminal device.

[0152] S302, The terminal device sends capability information to the first network device. Correspondingly, the first network device receives the capability information from the terminal device.

[0153] The capability information is used to indicate the first EN-DC band combination. The first EN-DC band combination is the EN-DC band combination supported by the terminal device.

[0154] Optionally, the first EN-DC band combination can be one or more, and the embodiments of this application do not limit this.

[0155] S303. The first network device sends an RRC reconfiguration message to the terminal device. Correspondingly, the terminal device receives the RRC reconfiguration message from the first network device.

[0156] The description of step S303 can be found in [reference]. Figure 6 The specific details of step S201 are not repeated here.

[0157] S304. The terminal equipment determines that the second EN-DC frequency band combination does not match the first EN-DC frequency band combination.

[0158] Optionally, the second EN-DC band combination may not match the first EN-DC band combination, including one or more of the following situations:

[0159] Scenario 1: The frequency bands in the second EN-DC band combination do not match the frequency bands in the first EN-DC band combination.

[0160] As one possible implementation, the frequency band configured by the EUTRA parameter in the second EN-DC band combination is different from the frequency band configured by the EUTRA parameter in the first EN-DC band combination; and / or, the frequency band configured by the NR parameter in the second EN-DC band combination is different from the frequency band configured by the NR parameter in the first EN-DC band combination.

[0161] For example, the frequency band in the first EN-DC band combination is B3+N79, and the frequency band in the second EN-DC is B3+N78. Since N79 is different from N78, the frequency band in the first EN-DC band combination does not match the frequency band in the first EN-DC band combination.

[0162] Scenario 2: The bandwidth in the second EN-DC band combination is greater than the bandwidth in the first EN-DC band combination.

[0163] As one possible implementation, the bandwidth configured by the EUTRA parameter in the second EN-DC band combination is greater than the bandwidth configured by the EUTRA parameter in the first EN-DC band combination; and / or, the bandwidth configured by the NR parameter in the second EN-DC band combination is greater than the bandwidth configured by the NR parameter in the first EN-DC band combination. Optionally, the aforementioned bandwidth can be uplink bandwidth or downlink bandwidth.

[0164] Scenario 3: The maximum number of CCs in the second EN-DC band combination is greater than the maximum number of CCs in the first EN-DC band combination.

[0165] As one possible implementation, the maximum number of CCs configured by the EUTRA parameters in the second EN-DC band combination is greater than the maximum number of CCs configured by the EUTRA parameters in the first EN-DC band combination; and / or, the maximum number of CCs configured by the NR parameters in the second EN-DC band combination is different from the maximum number of CCs configured by the NR parameters in the first EN-DC band combination.

[0166] For example, in the first EN-DC band combination, the bands are B3+N78, where the maximum number of CCs corresponding to B3 is 1, and the maximum number of CCs corresponding to N78 is 1. In the second EN-DC band combination, the bands are also B3+N78, where the maximum number of CCs corresponding to B3 is 1, and the maximum number of CCs corresponding to N78 is 2. Because the maximum number of CCs corresponding to N78 in the first EN-DC band combination is less than the maximum number of CCs corresponding to N78 in the second EN-DC band combination, the second EN-DC band combination is mismatched with the first EN-DC band combination.

[0167] Scenario 4: The MIMO capability in the second EN-DC band combination does not match the MIMO capability in the first EN-DC band combination.

[0168] As one possible implementation, the MIMO capability configured by the EUTRA parameters in the second EN-DC band combination is greater than the MIMO capability configured by the EUTRA parameters in the first EN-DC band combination; and / or, the MIMO capability configured by the NR parameters in the second EN-DC band combination is greater than the MIMO capability configured by the NR parameters in the first EN-DC band combination.

[0169] For example, in the first EN-DC band combination, the bands are B3+N78. B3 has a MIMO capability of 2, and N78 has a MIMO capability of 4. In the second EN-DC band combination, the bands are also B3+N78, with both B3 and N78 having a MIMO capability of 4. Since the MIMO capability of B3 in the first EN-DC band combination is less than that in the second EN-DC band combination, the second EN-DC band combination is mismatched with the first EN-DC band combination.

[0170] Scenario 5: The frequency points in the second EN-DC band combination do not match the frequency points in the first EN-DC band combination.

[0171] As one possible implementation, the frequency point configured by the EUTRA parameter in the second EN-DC band combination is different from the frequency point configured by the EUTRA parameter in the first EN-DC band combination; and / or, the frequency point configured by the NR parameter in the second EN-DC band combination is different from the frequency point configured by the NR parameter in the first EN-DC band combination.

[0172] It should be understood that the mismatch between the second EN-DC band combination and the first EN-DC band combination means that the terminal device cannot comply with the second EN-DC band combination.

[0173] S305. The terminal device sends a secondary cell group failure message to the first network device. Correspondingly, the first network device receives the secondary cell group failure message from the terminal device.

[0174] The description of step S305 can be found in [reference]. Figure 6 The specific details of step S203 are not repeated here.

[0175] based on Figure 8 In the illustrated embodiment, if the first EN-DC frequency band combination does not match the second EN-DC frequency band combination, the terminal device sends a secondary cell group failure message to the first network device to indicate EN-DC configuration failure, while avoiding triggering the RRC re-establishment procedure. In this way, since the RRC re-establishment procedure is not triggered, the connection between the terminal device and the first network device can be maintained, thereby ensuring normal communication between the terminal device and the first network device.

[0176] The above primarily describes the solutions provided by the embodiments of this application from a methodological perspective. It is understood that, in order to achieve the above functions, the terminal or the first network device includes hardware structures and / or software modules corresponding to the execution of each function. Based on the units and algorithm steps of the various examples described in the embodiments disclosed in this application, the embodiments of this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed by hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the technical solutions of the embodiments of this application.

[0177] This application embodiment can divide the communication device into functional units according to the above method example. For example, each function can be divided into a separate functional unit, or two or more functions can be integrated into one processing unit. The integrated unit can be implemented in hardware or as a software functional unit. It should be noted that the unit division in this application embodiment is illustrative and only represents one logical functional division. In actual implementation, there may be other division methods.

[0178] like Figure 9 As shown, this is a communication device provided in an embodiment of the present application. The communication device includes a processing module 301 and a communication module 302.

[0179] In one possible implementation, the communication device is a terminal device or part of a terminal device, and the processing module 301 is used to generate messages (such as capability information, secondary cell group failure information, RRC reconfiguration completion messages, etc.) and execute... Figure 6 Step S202 in the middle, Figure 8 Step S304 in the process. Communication module 302 is used to perform... Figure 6 Steps S201 and S203 in the process, Figure 7 Step S204 in the middle, Figure 8 Steps S301-S303 and S305 in the process.

[0180] Optional, combined Figure 5 The terminal device shown, Figure 9 The communication module 302 in the middle can be made by Figure 5 This is implemented using transceiver 103. Figure 9 The processing module 301 in the middle can be made by Figure 5 The processor 101 in the application is used for implementation, but this embodiment does not impose any limitations on it.

[0181] In another possible implementation, the communication device is a network device or part of a network device, and the processing module 301 is used to generate messages (e.g., RRC reconfiguration messages). The communication module 302 is used to execute... Figure 6 Steps S201 and S203 in the process, Figure 7 Step S204 in the middle, Figure 8 Steps S301-S303 and S305 in the process.

[0182] Optional, combined Figure 5 The network devices shown, Figure 9 The communication module 302 in the middle can be made by Figure 5 This is implemented using transceiver 203. Figure 9 The processing module 301 in the middle can be made by Figure 5The processor 201 in the application is used for implementation, but this embodiment does not impose any limitations on it.

[0183] This application also provides a computer program product carrying computer instructions, which, when executed on a computer, cause the computer to perform the above-described... Figures 6-8 The method in the middle.

[0184] This application also provides a computer-readable storage medium that stores computer instructions, which, when executed on a computer, cause the computer to perform the above-described... Figures 6-8 The method in the middle.

[0185] This application embodiment also provides a chip, including: a processing circuit and transceiver pins, the processing circuit and transceiver pins being used to implement the above. Figures 6-8 The method described in the text. The processing circuitry is used to execute the processing actions within the corresponding method, while the transmit / receive pins are used to execute the receiving / transmitting actions within the corresponding method.

[0186] Those skilled in the art will understand that the above embodiments can be implemented entirely or partially by software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented entirely or partially in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., digital video discs (DVDs)), or semiconductor media (e.g., solid-state disks (SSDs)).

[0187] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, indirect coupling or communication connection between devices or units, and may be electrical or other forms.

[0188] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple devices. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0189] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each functional unit can exist independently, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or in a combination of hardware and software functional units.

[0190] Through the above description of the embodiments, those skilled in the art can clearly understand that this application can be implemented by means of software plus necessary general-purpose hardware, and of course, it can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a readable storage medium, such as a computer floppy disk, hard disk, or optical disk, and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0191] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A communication method, characterized in that, The method includes: The terminal device sends capability information to the network device, the capability information being used to indicate the dual-connectivity EN-DC band combination between the first evolved general terrestrial radio access network and the new air interface network; The terminal device receives a Radio Resource Control (RRC) reconfiguration message sent by the network device, the RRC reconfiguration message being used to indicate a second EN-DC frequency band combination; If the second EN-DC band combination does not match the first EN-DC band combination, the terminal device sends a secondary cell group failure message to the network device.

2. The method according to claim 1, characterized in that, The second EN-DC band combination does not match the first EN-DC band combination, including at least one of the following situations: The frequency bands in the second EN-DC band combination do not match the frequency bands in the first EN-DC band combination; or, The bandwidth in the second EN-DC band combination does not match the bandwidth in the first EN-DC band combination; or, The maximum number of carrier units in the second EN-DC band combination does not match the maximum number of carrier units in the first EN-DC band combination; or, The MIMO capability of the second EN-DC band combination does not match the MIMO capability of the first EN-DC band combination; or, The frequency points in the second EN-DC band combination do not match the frequency points in the first EN-DC band combination.

3. The method according to claim 1 or 2, characterized in that, Before the terminal device sends capability information to the network device, the method further includes: The terminal device receives capability query information sent by the network device, the capability query information being used to request the terminal device to report the capability information.

4. The method according to claim 3, characterized in that, Before the terminal device receives the RRC reconfiguration message sent by the network device, the method further includes: The terminal device receives measurement configuration information sent by the network device; The terminal device sends a measurement report to the network device.

5. The method according to claim 4, characterized in that, The terminal device receives the RRC reconfiguration message sent by the network device, including: The terminal device receives the RRC reconfiguration message from the network device via the signaling radio bearer SRB1.

6. The method according to claim 5, characterized in that, The method further includes: The terminal device sends an RRC reconfiguration complete message to the network device.

7. The method according to claim 6, characterized in that, The network device supports the 4G communication standard.

8. A communication method, characterized in that, The method includes: The network device receives capability information from the terminal device, the capability information being used to indicate a first EN-DC frequency band combination; The network device sends an RRC reconfiguration message to the terminal device, the RRC reconfiguration message being used to indicate the second EN-DC frequency band combination; If the second EN-DC band combination does not match the first EN-DC band combination, the network device receives secondary cell group failure information from the terminal device.

9. The method according to claim 8, characterized in that, The second EN-DC band combination does not match the first EN-DC band combination, including at least one of the following situations: The frequency bands in the second EN-DC band combination do not match the frequency bands in the first EN-DC band combination; or, The bandwidth in the second EN-DC band combination does not match the bandwidth in the first EN-DC band combination; or, The maximum number of carrier units in the second EN-DC band combination does not match the maximum number of carrier units in the first EN-DC band combination; or, The MIMO capability in the second EN-DC band combination does not match the MIMO capability in the first EN-DC band combination; or, The frequency points in the second EN-DC band combination do not match the frequency points in the first EN-DC band combination.

10. The method according to claim 8 or 9, characterized in that, Before the network device receives capability information from the terminal device, the method further includes: The network device sends a capability query message to the terminal device, the capability query message being used to request the terminal device to report the capability information.

11. The method according to claim 10, characterized in that, Before the network device sends the RRC reconfiguration message to the terminal, the method further includes: The network device sends measurement configuration information to the terminal device; The network device receives measurement reports from the terminal device.

12. The method according to claim 11, characterized in that, The network device sends an RRC reconfiguration message to the terminal device, including: The network device sends the RRC reconfiguration message to the terminal device via SRB1.

13. The method according to claim 12, characterized in that, The method further includes: The network device receives an RRC reconfiguration complete message from the terminal device.

14. The method according to claim 13, characterized in that, The network device supports the 4G communication standard.

15. A communication device, characterized in that, include: Processing module and communication module; The communication module is configured to send capability information to the network device, the capability information being used to indicate a first EN-DC frequency band combination; and to receive an RRC reconfiguration message sent by the network device, the RRC reconfiguration message being used to indicate a second EN-DC frequency band combination. The processing module shown is used to determine that the second EN-DC frequency band combination does not match the first EN-DC frequency band combination; The communication module is further configured to send secondary cell group failure information to the network device when the processing module determines that the second EN-DC frequency band combination does not match the first EN-DC frequency band combination.

16. The communication device according to claim 15, characterized in that, The second EN-DC band combination does not match the first EN-DC band combination, including at least one of the following situations: The frequency bands in the second EN-DC band combination do not match the frequency bands in the first EN-DC band combination; or, The bandwidth in the second EN-DC band combination does not match the bandwidth in the first EN-DC band combination; or, The maximum number of carrier units in the second EN-DC band combination does not match the maximum number of carrier units in the first EN-DC band combination; or, The MIMO capability in the second EN-DC band combination does not match the MIMO capability in the first EN-DC band combination; or, The frequency points in the second EN-DC band combination do not match the frequency points in the first EN-DC band combination.

17. The communication device according to claim 15 or 16, characterized in that, The communication module is also configured to receive capability query information sent by the network device, the capability query information being used to request the reporting of the capability information.

18. The communication device according to claim 17, characterized in that, The communication module is also used to receive measurement configuration information sent by the network device and to send measurement reports to the network device.

19. The communication device according to claim 18, characterized in that, The communication module is used to receive RRC reconfiguration messages sent by the network device, including: The RRC reconfiguration message is received from the network device via SRB1.

20. The communication device according to claim 19, characterized in that, The communication module is also used to send an RRC reconfiguration complete message to the network device.

21. The communication device according to claim 20, characterized in that, The network device supports the 4G communication standard.

22. A communication device, characterized in that, Includes a communication module and a processing module; The communication module is used to receive capability information from the terminal device, the capability information being used to indicate a first EN-DC frequency band combination; The processing module is used to generate an RRC reconfiguration message, which is used to indicate the second EN-DC frequency band combination; The communication module is also configured to send an RRC reconfiguration message to the terminal device; and to receive secondary cell group failure information from the terminal device if the second EN-DC frequency band combination does not match the first EN-DC frequency band combination.

23. The communication device according to claim 22, characterized in that, The second EN-DC band combination does not match the first EN-DC band combination, including at least one of the following situations: The frequency bands in the second EN-DC band combination do not match the frequency bands in the first EN-DC band combination; or, The bandwidth in the second EN-DC band combination does not match the bandwidth in the first EN-DC band combination; or, The maximum number of carrier units in the second EN-DC band combination does not match the maximum number of carrier units in the first EN-DC band combination; or, The MIMO capability in the second EN-DC band combination does not match the MIMO capability in the first EN-DC band combination; or, The frequency points in the second EN-DC band combination do not match the frequency points in the first EN-DC band combination.

24. The communication device according to claim 22 or 23, characterized in that, The communication module is further configured to send capability query information to the terminal device, the capability query information being used to request the terminal device to report the capability information.

25. The communication device according to claim 24, characterized in that, The communication module is also used to send measurement configuration information to the terminal device and receive measurement reports from the terminal device.

26. The communication device according to claim 25, characterized in that, The communication module is used to send an RRC reconfiguration message to the terminal device, including: The RRC reconfiguration message is sent to the terminal device via SRB1.

27. The communication device according to claim 26, characterized in that, The communication module is also used to receive an RRC reconfiguration complete message from the terminal device.

28. The communication device according to claim 27, characterized in that, The communication device is applied to network equipment, which supports the 4G communication standard.

29. A communication device, characterized in that, It includes a processor and a communication interface, wherein the processor is used to perform processing operations in the method of any one of claims 1 to 14, and the communication interface is used to perform communication operations in the method of any one of claims 1 to 14.

30. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes computer instructions that, when executed on a computer, cause the computer to perform the method according to any one of claims 1 to 14.

31. A computer program product, characterized in that, The computer program product includes computer instructions that, when executed on a computer, cause the computer to perform the method according to any one of claims 1 to 14.

32. A chip, characterized in that, The chip includes a processing circuit and transceiver pins; the processing circuit is used to perform the processing operation in the method of any one of claims 1 to 14, and the transceiver pins are used to perform the communication operation in the method of any one of claims 1 to 14.

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