CN115918242A

CN115918242A - Communication method and device

Info

Publication number: CN115918242A
Application number: CN202180003827.6A
Authority: CN
Inventors: 贾玖玲; 陈洪强; 韩磊
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-02-27
Filing date: 2021-02-27
Publication date: 2023-04-04
Also published as: WO2022178893A1

Abstract

A communication method and device relate to the technical field of communication and are used for reducing the probability of disconnecting a 4G network connection of a terminal device and improving the communication stability of the terminal device under the condition that an EN-DC frequency band combination issued by the network device is not matched with an EN-DC frequency band combination supported by the terminal device. The method comprises the following steps: the terminal equipment sends capability information to the first network equipment, wherein the capability information is used for indicating a first EN-DC frequency band combination, and the first EN-DC frequency band combination is an EN-DC frequency band combination supported by the terminal equipment; the terminal equipment receives an RRC reconfiguration message sent by the first network equipment, wherein the RRC reconfiguration message is used for indicating a second EN-DC frequency band combination, and the second EN-DC frequency band combination is an EN-DC frequency band combination configured to be used by the terminal equipment; and when the second EN-DC frequency band combination is not matched with the first EN-DC frequency band combination, the terminal equipment sends auxiliary cell group failure information to the first network equipment.

Description

Communication method and device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a communication method and apparatus.

Background

With the rapid development of the mobile internet, in order to better meet the requirements of people on the operation speed and bandwidth of a wireless network for providing a data pipeline, a 5G network is developed. However, since the construction difficulty and the construction cost of the 5G base station are relatively high, most of the 5G base stations are not installed in place, and considering the wide popularization of the 4G network and the acceptance degree of wide users, at present, operators generally use a non-independent Networking (NSA) mode to accelerate the deployment process of the 5G network.

The NSA networking uses a 4G-5G dual connectivity (EN-DC) mode to anchor a 5G new radio, NR control plane (control plane) to a core network of a 4G Long Term Evolution (LTE), and the 5G NR is used to carry a service of a user plane (user plane). The control plane is a channel for transmitting and scheduling signaling required by resources, and the user plane is a channel for transmitting user data. Due to the particularity of the EN-DC, a high degree of cooperation between the terminal equipment and the base station side is required to provide normal high-quality data services, otherwise the compatibility problem of the network is more easily exposed.

For example, in the process of performing NSA network access, the terminal device may report an EN-DC frequency band combination supported by the terminal device to the 4G base station. And then, the 4G base station issues an EN-DC frequency band combination to the terminal equipment to configure the terminal equipment to activate Carrier Aggregation (CA), so that the terminal equipment enters a dual-connection state.

However, in some cases, the EN-DC frequency band combination issued by the 4G base station is not matched with the EN-DC frequency band combination supported by the terminal device, so that the terminal device cannot adopt the EN-DC frequency band combination issued by the 4G base station. In this case, the terminal device initiates a Radio Resource Control (RRC) reestablishment procedure according to the existing communication protocol. The RRC reestablishment procedure initiated by the terminal device may be rejected by the network side, or the RRC reestablishment procedure fails, thereby causing the terminal device to disconnect the 4G network, and affecting the normal communication of the terminal device.

Disclosure of Invention

The application provides a communication method, which is used for reducing the probability of disconnecting 4G network connection of terminal equipment and improving the communication stability of the terminal equipment under the condition that an EN-DC frequency band combination issued by the network equipment is not matched with an EN-DC frequency band combination supported by the terminal equipment.

In a first aspect, a communication method is provided, including: the terminal equipment sends capability information to the network equipment, wherein the capability information is used for indicating a first EN-DC frequency band combination; the terminal equipment receives an RRC reconfiguration message sent by the network equipment, wherein the RRC reconfiguration message is used for indicating a second EN-DC frequency band combination; and under the condition that the second EN-DC frequency band combination is not matched with the first EN-DC frequency band combination, the terminal equipment sends auxiliary cell group failure information to the network equipment.

Based on the technical scheme, under the condition that the first EN-DC frequency band combination does not match the second EN-DC frequency band combination, the terminal equipment sends auxiliary cell group failure information to the first network equipment to indicate EN-DC configuration failure and simultaneously avoid triggering RRC reestablishment flow. Therefore, the RRC reestablishment process is not triggered, so that the terminal equipment and the first network equipment can be ensured to maintain connection, and the normal communication between the terminal equipment and the first network equipment is further ensured.

In one possible design, the second EN-DC frequency band combination does not match the first EN-DC frequency band combination, including at least one of: the frequency band in the second EN-DC frequency band combination does not match the frequency band in the first EN-DC frequency band combination; or the bandwidth in the second EN-DC frequency band combination does not match the bandwidth in the first EN-DC frequency band combination; or the maximum number of carrier units in the second EN-DC frequency band combination does not match the maximum number of carrier units in the first EN-DC frequency band combination; or, a Multiple Input Multiple 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 point in the second EN-DC frequency band combination does not match the frequency point in the first EN-DC frequency band combination.

In one possible design, before the terminal device sends the capability information to the network device, the method further includes: the terminal equipment receives capability inquiry information sent by the network equipment, and the capability inquiry information is used for requesting the terminal equipment to report the capability information.

In one possible design, before the terminal device receives the RRC reconfiguration message sent by the network device, the method further includes: the terminal equipment receives measurement configuration information sent by the network equipment; the terminal device sends a measurement report to the network device. Based on the design, the network side can select a proper base station as an auxiliary node of the terminal equipment based on the measurement report reported by the terminal equipment.

In one possible design, the receiving, by the terminal device, the RRC reconfiguration message sent by the network device includes: the terminal equipment receives the RRC reconfiguration message from the network equipment through the SRB1.

In one possible design, the method further includes: and the terminal equipment sends an RRC reconfiguration completion message to the network equipment. Based on the design, the phenomenon that the network side mistakenly thinks that the terminal equipment is abnormal because the network side does not receive the response of the terminal equipment to the RRC reconfiguration message for a long time can be avoided.

In one possible design, the network device supports a 4G communication scheme.

In a second aspect, a communication method is provided, including: the network equipment receives capability information from the terminal equipment, wherein the capability information is used for indicating a first EN-DC frequency band combination; the network equipment sends an RRC reconfiguration message to the terminal equipment, wherein the RRC reconfiguration message is used for indicating the second EN-DC frequency band combination; and under the condition that the second EN-DC frequency band combination is not matched with the first EN-DC frequency band combination, the network equipment receives the auxiliary cell group failure information from the terminal equipment.

In one possible design, the second EN-DC frequency band combination does not match the first EN-DC frequency band combination, including at least one of: the frequency band in the second EN-DC frequency band combination does not match the frequency band in the first EN-DC frequency band combination; or the bandwidth in the second EN-DC frequency band combination does not match the bandwidth in the first EN-DC frequency band combination; or the maximum number of carrier units in the second EN-DC frequency band combination does not match the maximum number of carrier units in the first EN-DC frequency 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 point in the second EN-DC frequency band combination does not match the frequency point in the first EN-DC frequency band combination.

In one possible design, before the network device receives the capability information from the terminal device, the method further includes: the network equipment sends capability inquiry information to the terminal equipment, and the capability inquiry information is used for requesting the terminal equipment to report the capability information.

In one possible design, before the network device sends the RRC reconfiguration message to the terminal, the method further includes: the network equipment sends measurement configuration information to the terminal equipment; the network device receives the measurement report from the terminal device.

In one possible design, the sending, by the network device, the RRC reconfiguration message to the terminal device includes: and the network equipment sends RRC reconfiguration information to the terminal equipment through the SRB1.

In one possible design, the method further includes: the network equipment receives the RRC reconfiguration complete message from the terminal equipment.

In one possible design, the network device supports a 4G communication scheme.

In a third aspect, a communication apparatus is provided, including: a processing module and a communication module; the communication module is used for sending capability information to the network equipment, and the capability information is used for indicating the first EN-DC frequency band combination; receiving an RRC reconfiguration message sent by the network equipment, wherein the RRC reconfiguration message is used for indicating a second EN-DC frequency band combination; the processing module is used for determining that the second EN-DC frequency band combination is not matched with the first EN-DC frequency band combination; and the communication module is further used for sending the auxiliary cell group failure information to the network device under the condition that the processing module determines that the second EN-DC frequency band combination is not matched with the first EN-DC frequency band combination.

In one possible design, the second EN-DC frequency band combination does not match the first EN-DC frequency band combination, including at least one of: the frequency band in the second EN-DC frequency band combination does not match the frequency band in the first EN-DC frequency band combination; or the bandwidth in the second EN-DC frequency band combination does not match the bandwidth in the first EN-DC frequency band combination; or the maximum number of the carrier units in the second EN-DC frequency band combination is not matched with the maximum number of the carrier units in the first EN-DC frequency band combination; or the MIMO capability in the second EN-DC frequency band combination does not match the MIMO capability in the first EN-DC frequency band combination; or the frequency point in the second EN-DC frequency band combination does not match the frequency point in the first EN-DC frequency band combination.

In a possible design, the communication module is further configured to receive capability query information sent by the network device, where the capability query information is used to request reporting of the capability information.

In one possible design, the communication module is further configured to receive measurement configuration information sent by the network device; and sending the measurement report to the network equipment.

In one possible design, the communication module is configured to receive an RRC reconfiguration message sent by a network device, and includes: an RRC reconfiguration message from the network device is received through SRB1.

In one possible design, the communication module is further configured to send an RRC reconfiguration complete message to the network device.

In one possible design, the network device supports a 4G communication scheme.

In a fourth aspect, a communication apparatus is provided that includes a communication module and a processing module. The communication module is used for receiving capability information from the terminal equipment, and the capability information is used for indicating a first EN-DC frequency band combination; the processing module is used for generating an RRC reconfiguration message, and the RRC reconfiguration message is used for indicating a second EN-DC frequency band combination; the communication module is further used for sending an RRC reconfiguration message to the terminal equipment; and receiving the failure information of the auxiliary cell group from the terminal equipment under the condition that the second EN-DC frequency band combination is not matched with the first EN-DC frequency band combination.

In one possible design, the second EN-DC frequency band combination does not match the first EN-DC frequency band combination, including at least one of: the frequency band in the second EN-DC frequency band combination does not match the frequency band in the first EN-DC frequency band combination; or the bandwidth in the second EN-DC frequency band combination does not match the bandwidth in the first EN-DC frequency band combination; or the maximum number of carrier units in the second EN-DC frequency band combination does not match the maximum number of carrier units in the first EN-DC frequency band combination; or the MIMO capability in the second EN-DC frequency band combination does not match the MIMO capability in the first EN-DC frequency band combination; or the frequency points in the second EN-DC frequency band combination do not match the frequency points in the first EN-DC frequency band combination.

In a possible design, the communication module is further configured to send capability query information to the terminal device, where the capability query information is used to request the terminal device to report the capability information.

In one possible design, the communication module is further configured to send measurement configuration information to the terminal device; a measurement report is received from a terminal device.

In one possible design, the communication module is configured to send an RRC reconfiguration message to the terminal device, and includes: and sending an RRC reconfiguration message to the terminal equipment through the SRB1.

In one possible design, the communication module is further configured to receive an RRC reconfiguration complete message from the terminal device.

In one possible design, the communication device is applied to a network device, and the network device supports a 4G communication system.

In a fifth aspect, a communication device is provided, which includes a processor and a transceiver for implementing any one of the methods provided in the first or second aspects. Wherein the processor is configured to perform processing actions in the respective method and the transceiver is configured to perform receiving/transmitting actions in the respective method.

A sixth aspect provides a computer readable storage medium storing computer instructions which, when executed on a computer, cause the computer to perform any one of the methods provided by the first or second aspects.

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

In an eighth aspect, there is provided a chip comprising: processing circuitry and transceiver pins for implementing the method as provided in the first or second aspect. The processing circuit is used for executing processing actions in the corresponding method, and the transceiving pin is used for executing receiving/transmitting actions in the corresponding method.

It should be noted that, for technical effects brought by any design in the third aspect to the eighth aspect, reference may be made to technical effects brought by corresponding designs in the first aspect or the second aspect, and details are not described here again.

Drawings

Fig. 1 is a schematic diagram of a dual connection architecture according to an embodiment of the present application;

fig. 2 is a schematic diagram of another dual-connection architecture provided in the present application;

FIG. 3 is a schematic diagram of another dual connectivity architecture provided in an embodiment of the present application;

fig. 4 is a flowchart of a dual connectivity provided by an embodiment of the present application;

fig. 5 is a schematic hardware structure diagram of a terminal device and a network device according to an embodiment of the present application;

fig. 6 is a flowchart of a communication method according to an embodiment of the present application;

fig. 7 is a flowchart of another communication method provided in the embodiments of the present application;

fig. 8 is a flowchart of another communication method according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of a communication device according to an embodiment of the present application.

Detailed Description

In the description of this application, "/" denotes "or" means, for example, a/B may denote a or B, unless otherwise indicated. "and/or" herein is merely an association describing an associated object, and means that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. Further, "at least one" means one or more, "a plurality" means two or more. The terms "first", "second", and the like do not necessarily limit the number and execution order, and the terms "first", "second", and the like do not necessarily limit the difference.

It is noted that, in the present application, words such as "exemplary" or "for example" are used to mean exemplary, illustrative, or descriptive. Any embodiment or design described herein as "exemplary" or "such as" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present relevant concepts in a concrete fashion.

The following is a brief introduction to the terminology referred to in this application to facilitate understanding of the schemes by those skilled in the art.

1. Dual connection

In the field of wireless communication technology, in order to improve the throughput of users, a Dual Connectivity (DC) technology is introduced. The DC may support two or more base stations to simultaneously provide a data transmission service for one terminal device. These base stations include a Master Node (MN) and one or more Secondary Nodes (SNs).

The main node is connected with a Core Network (CN) through an S1/NG interface. The main node and the core network at least comprise control plane connection and user plane connection. The S1 interface comprises S1-U and S1-C. The NG interface comprises NG-U and NG-C. Wherein S1-U/NG-U represents a user plane connection and S1-C/NG-C represents a control plane connection.

The secondary node may or may not have a user plane connection with the core network. When the secondary node and the core network do not have a user plane connection, data of the terminal device may be distributed to the secondary node by the primary node in a Packet Data Convergence Protocol (PDCP) layer. The primary node may also be referred to as a primary base station or primary access network device, and the SN may also be referred to as a secondary base station or secondary access network device.

In a dual connectivity scenario, the primary node manages a primary cell (PCell). The primary cell refers to a cell which is deployed at a primary frequency point and is accessed in an initial connection establishment process or an RRC connection reestablishment process initiated by a terminal device, or a cell indicated as the primary cell in a switching process.

Further, the primary node may manage one or more secondary cells (scells) in addition to the primary cell. The cells under the master node, such as the master cell and the secondary cells under the master node, which provide services for the terminal device, may be collectively referred to as a Master Cell Group (MCG).

The secondary node manages a primary secondary cell (PSCell). The primary and secondary cells may be cells accessed in a process of initiating random access to the secondary node by the terminal device, or cells on another secondary node where the terminal device initiates data transmission in a process of changing the secondary node by skipping the random access process, or cells on the secondary node accessed in a process of initiating random access when executing a synchronization reconfiguration process.

Further, the secondary node may manage one or more secondary cells in addition to the primary and secondary cells. The cells serving the terminal device on the secondary node, such as the primary and secondary cells and the secondary cells on the secondary node, may be collectively referred to as SCG.

For convenience of description, in the NR protocol, a primary cell and a primary secondary cell are collectively referred to as a special cell (scell).

The dual connectivity network may have various implementation manners according to the communication systems supported by the primary node and the secondary node, which will be described below as an example.

Fig. 1 is a schematic diagram of an LTE-NR dual connectivity (EN-DC) network. The EN-DC network is a dual connectivity of a 4G radio access network with a 5G NR, with an LTE base station (LTE eNB) as MN and an NR base station (NR gNB) as SN. As shown in fig. 1 (a), an S1 interface exists between an LTE eNB and an Evolved Packet Core (EPC) of the LTE system, and there is at least a control plane connection and may also be a user plane connection. As shown in fig. 1 (b), there is an S1-U interface between NR gNB and EPC, i.e. there may only be a user plane connection.

FIG. 2 is a schematic diagram of an NR-LTE Dual Connectivity (NE-DC) network. The NE-DC network is a dual connection of a 4G radio access network under a 5G Core network with a 5G NR, a NR base station (gNB) as MN, an LTE base station (ng-eNB) as SN, and both MN and SN are connected to the 5G Core network (5th Generation Core network, 5gc). As shown in fig. 2 (a), an NG interface exists between the gNB and the 5GC, a control plane connection and a user plane connection can be established for the terminal device, and the NG-eNB sends user plane data to the 5GC through the gNB. As shown in fig. 2 (b), an NG-U interface exists between the NG-eNB and the 5GC, a user plane connection is established only for the terminal device, and the NG-eNB directly transmits user plane data to the 5GC.

FIG. 3 is a schematic diagram of a 5G core network LTE-NR Dual Connectivity (NGEN-DC) network. The NGEN-DC network is a dual connection of a 4G radio access network under a 5G core network and a 5G NR, an LTE base station (ng-eNB) is used as MN, an NR base station (gNB) is used as SN, and both MN and SN are connected with 5GC. As shown in fig. 3 (a), an NG interface exists between the NG-eNB and the 5GC, a control plane connection and a user plane connection can be established for the terminal device, and the gNB transmits user plane data to the 5GC through the NG-eNB. As shown in fig. 3 (b), an NG-U interface exists between the gNB and the 5GC, a user plane connection is established only for the terminal device, and the gNB directly transmits user plane data to the 5GC.

In the dual connectivity network shown in fig. 1 to fig. 3, instead of establishing a user plane connection, the SN and the core network may transfer data through the MN, for example, in a downlink direction, data of the terminal device first arrives at the MN, and the MN shunts the data of the terminal device to the SN at a PDCP layer, where the form of the shunted data is, for example, a PDCP Protocol Data Unit (PDU).

2. Dual connection establishment procedure

As shown in fig. 4, the EN-DC dual connection establishment procedure in the related art includes the following steps:

s100, the terminal equipment is registered to the LTE network.

S101, the eNB determines to add the gNB as an auxiliary node.

S102, the eNB sends an auxiliary node adding request message to the gNB.

The auxiliary node adding request message is used for requesting the gNB to serve as an auxiliary node of the terminal equipment.

Optionally, the secondary node addition request message may carry RRC and radio bearer configuration.

Optionally, the auxiliary node addition request message may also carry information related to functions, security, and the like of the terminal device.

S103, the gNB sends an auxiliary node addition request confirmation message to the eNB.

The auxiliary node adding request confirmation message is used for responding to the auxiliary node adding request message.

S104, the eNB sends an RRC reconfiguration (reconfiguration) message to the terminal device.

The RRC reconfiguration message is used to configure a 5G radio bearer for the terminal device.

S105, the terminal equipment accesses the 5G cell.

S106, the terminal equipment sends an RRC reconfiguration complete message to the eNB.

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

Based on the flow shown in fig. 4, the terminal device completes establishment of the EN-DC dual connection.

3. Signaling Radio Bearer (SRB)

SRB is used to transport RRC messages and NAS messages. SRBs can be classified into the following categories:

(1) SRB0, which is established on a Common Control Channel (CCCH), is used to transmit RRC messages.

(2) SRB1 is established on a Dedicated Control Channel (DCCH), and is mainly used for transmitting RRC messages, and may also transmit NAS messages together with RRC messages in an embedded manner.

(3) SRB2, after the security mode is completed, is established on DCCH, and specially transmits NAS information in a reliable and secure mode.

(4) And the SRB3 is established on the DCCH and is used for transmitting RRC messages between the terminal equipment and the gNB serving as the auxiliary base station in the EN-DC scene.

4. Frequency band (band)

In the field of communications technology, a frequency band refers to a frequency range of electromagnetic waves. Illustratively, table 1 shows the E-UTRA operating band specification from 3 GPP.

TABLE 1

In the following, the band number of the 4G network starts with "B", for example, B20 represents the band with the band number of 20 in the 4G network. The band number of the 5G network starts with "N", for example, N78 represents the band with the band number 78 in the 5G network.

5. Frequency point

A frequency bin refers to the center frequency of a frequency band (or sub-band). It should be understood that, regardless of E-UTRA or NR, one operating band may be divided into a plurality of sub-bands, and one sub-band may be referred to as one carrier element (CC). In the frequency domain, one carrier unit may be regarded as one cell.

For example, the calculation of frequency points in E-UTRA is described below.

For the uplink band, F _UL ＝F _{UL_low} +0.1(N _UL -N _offs-UL ). Wherein, F _UL Is the frequency point of the uplink frequency band, F _{UL_low} Is the minimum uplink frequency, N, of the E-UTRA operating band in which the uplink band is located _UL Is the frequency point number of the uplink frequency band, N _offs-UL The lowest uplink frequency point number of the E-UTRA working frequency band where the uplink frequency band is located.

For the downlink frequency band, F _DL ＝F _{DL_low} +0.1(N _DL -N _offs-DL ). Wherein, F _DL Is the frequency point of the downlink frequency band, F _{DL_low} Is the minimum downlink frequency, N, of the E-UTRA operating frequency band in which the downlink frequency band is located _DL Is the frequency point number, N, of the downlink frequency band _offs-DL The lowest row frequency point number of the E-UTRA working frequency band where the downlink frequency band is located.

6. Carrier Aggregation (CA)

Carrier aggregation refers to the aggregation of two or more carrier elements together to support a larger transmission bandwidth.

The types of carrier aggregation include: intra-Band (intra-Band) carrier aggregation and inter-Band (inter-Band) carrier aggregation. Intra-Band carrier aggregation is further divided into continuous (contiguous) and non-continuous (non-contiguous).

For intra-Band connectivity CA, an Aggregated Transmission Bandwidth Configuration (ATBC) and a maximum number of consecutive CCs are indicated by a CA bandwidth class (bandwidth class).

Illustratively, table 2 shows the meaning of different values of the CA bandwidth level.

TABLE 2

CA Bandwidth class	ATBC	Maximum number of consecutive CCs
A	ATBC≤100MHz	1
B	ATBC＝25MHz	2

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

The above is an introduction of terms related to the embodiments of the present application, and the description is not repeated herein.

The communication method provided by the embodiment of the present application may be applied in an EN-DC dual-connection scenario or other DC scenarios, and the embodiment of the present application does not limit a specific architecture of a dual-connection network to which the communication method is adapted. The following embodiments mainly take an EN-DC dual connection scenario as an example to illustrate the communication method provided in the embodiments of the present application.

In the embodiment of the present application, the terminal device is a device having a wireless transceiving function. The terminal equipment can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on the water surface (such as a ship and the like); and may also be deployed in the air (e.g., airplanes, balloons, satellites, etc.). The terminal device may be a User Equipment (UE). Wherein the UE comprises a handheld device, an in-vehicle device, a wearable device, or a computing device with wireless communication capabilities. Illustratively, the UE may be a mobile phone (mobile phone), a tablet computer, or a computer with wireless transceiving function. The terminal device may 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 unmanned driving, a wireless terminal device in telemedicine, a wireless terminal device in a smart grid, a wireless terminal device in a smart city (smart city), a wireless terminal device in a smart home (smart home), and so on. In this embodiment of the present application, the apparatus for implementing the function of the terminal device may be the terminal device, or may be an apparatus, such as a chip system, that can support the terminal device to implement the function. In the embodiment of the present application, the chip system may be composed of a chip, and may also include a chip and other discrete devices.

In the embodiment of the present application, the network device includes but is not limited to: an Access Point (AP) in a wireless fidelity (WiFi) system, such as a home gateway, a router, a server, a switch, a bridge, etc., an evolved Node B (eNB), a Radio Network Controller (RNC), a Node B (NB), a base station controller (base station controller, BSC), a Base Transceiver Station (BTS), a home base station (e.g., home evolved Node B, or home B, HNB), a base band unit (base band unit, BBU), a radio relay Node, a radio backhaul Node, a transmission point (transmission and reception point, TRP or transmission point, etc.), and may also be 5G, such as a radio interface (new radio, NR) system, a trptp, or transmission point (NB), a transmission point (transmission and reception point, TRP or transmission point, etc., and may also be a group of multiple Access Points (APs) in a WiFi system, and may also include one or multiple Access Points (APs) in a network panel, or a group of multiple access points (rsb, NBs), or a radio network panel, or a radio base station panel, etc., and may also be configured as a new air interface (radio network panel, a radio base station, or a radio base station panel, etc.

Alternatively, the network device may adopt a Centralized Unit (CU) -DU architecture. That is, the network device may be composed of a CU and at least one DU. In this case, part of the functions of the network device are deployed on the CU, and another part of the functions of the network device are deployed on the DU. The CU and DU are divided according to the protocol stack. As an implementation manner, a CU is deployed with an RRC layer, a PDCP layer, and a Service Data Adaptation Protocol (SDAP) layer in a protocol stack; the DU is deployed with a Radio Link Control (RLC) layer, a Media Access Control (MAC) layer, and a physical layer (PHY) in a protocol stack. Accordingly, 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 division of functions is only an example, and does not constitute a limitation on CUs and DUs. That is to say, there may be other function splitting manners between the CU and the DU, which are not described herein again in this embodiment of the present application.

Exemplarily, fig. 5 is a schematic diagram of hardware structures of a network device and a terminal device provided in the embodiment of the present application.

The terminal device comprises at least one processor 101 and at least one transceiver 103. Optionally, the terminal device may further include an output device 104, an input device 105, and at least one memory 102.

The processor 101, memory 102 and transceiver 103 are connected by a bus. The processor 101 may be a general-purpose Central Processing Unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more ics for controlling the execution of programs in accordance with the present disclosure. The processor 101 may also include multiple CPUs, and the processor 101 may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. A processor herein may refer to one or more devices, circuits, or processing cores that process data (e.g., computer program instructions).

The memory 102 may be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that can store information and instructions, 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 compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), a magnetic disc storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, which is not limited by the embodiments of the present application. The memory 102 may be separate and coupled to the processor 101 via a bus. The memory 102 may also be integrated with the processor 101. The memory 102 is used for storing application program codes for executing the scheme of the application, and the processor 101 controls the execution. The processor 101 is configured to execute the computer program code stored in the memory 102, thereby implementing the methods provided by the embodiments of the present application.

The transceiver 103 may use any transceiver or other device for communicating with other devices or communication networks, such as ethernet, radio Access Network (RAN), wireless Local Area Networks (WLAN), etc. The transceiver 103 includes a transmitter Tx and a receiver Rx.

The output device 104 is in communication with the processor 101 and may display information in a variety of ways. For example, the output device 104 may be a Liquid Crystal Display (LCD), a Light Emitting Diode (LED) display device, a Cathode Ray Tube (CRT) display device, a projector (projector), or the like. The input device 105 is in communication with the processor 101 and may receive user input in a variety of ways. For example, the input device 105 may be a mouse, a keyboard, a touch screen device, or a sensing device, among others.

The network device comprises 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 by a bus. The network interface 204 is configured to be connected to a core network device through a link, or connected to a network interface of another network device through a wired or wireless link (not shown in the figure), which is not specifically limited in this embodiment of the application. In addition, the description of the processor 201, the memory 202 and the transceiver 203 may refer to the description of the processor 101, the memory 102 and the transceiver 103 in the terminal device, and will not be repeated herein.

The embodiments of the present application will be described in detail below with reference to the drawings.

As shown in fig. 6, a communication method provided for the embodiment of the present application includes the following steps:

s201, the first network equipment sends RRC reconfiguration information to the terminal equipment. Correspondingly, the terminal device receives the RRC reconfiguration information sent by the first network device. And the RRC reconfiguration information comprises a second EN-DC frequency band combination.

Optionally, the first network device supports a 4G communication system. Illustratively, the first network device may be an eNB.

In the embodiment of the present application, the second EN-DC frequency band combination is an EN-DC frequency band combination configured to be used by the terminal device. Illustratively, the EN-DC band combination includes an EUTRA parameter and an NR parameter. The EUTRA parameters are used to configure the EUTRA band. The NR parameter is used to configure the NR frequency band.

Wherein the EUTRA parameter is used to configure one or more of the following parameters: MIMO capability, maximum number of CCs, frequency band, frequency point, 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, bandwidth.

MIMO refers to using a plurality of transmitting antennas and receiving antennas at a transmitting end and a receiving end, respectively, so that signals are transmitted through the plurality of antennas of the transmitting end and the receiving end, thereby improving communication quality or providing data transmission amount. Optionally, the MIMO capability may be characterized by the number of layers, i.e. the number of different data streams transmitted in parallel. Illustratively, the MIMO capability may be 2 layers, 4 layers, 8 layers, etc., without limitation.

Optionally, the MIMO capability may be further divided into an uplink MIMO capability and a downlink MIMO capability. The uplink MIMO capability and the downlink MIMO capability may 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.

Optionally, the EUTRA parameter may include a CA bandwidth rating to indicate a maximum number of CCs of the EUTRA band and a bandwidth. The NR parameter may include a CA bandwidth level to indicate a maximum number of CCs of the NR band and a bandwidth. For the CA bandwidth class, reference may be made to the foregoing description, and details are not described herein.

As a possible implementation manner, the terminal device registers in the network through the first network device, and the SRB1 is established between the terminal device and the first network device. And the first network equipment sends RRC reconfiguration information to the terminal equipment through the SRB1, wherein the RRC reconfiguration information comprises a second EN-DC frequency band combination.

Optionally, before step S201, the first network device sends measurement configuration information to the terminal; the terminal equipment carries out cell measurement based on the measurement configuration information; the first network device may receive a measurement report from the terminal device and determine the second network device as a secondary node of the terminal device based on the measurement report. Or, the first network device may also blindly configure the second network device as the secondary node of the terminal device under the condition that the measurement report of the terminal device is not received. Thereafter, the first network device may send a secondary node addition request message to the second network device. The first network device receives a secondary node addition request acknowledgement message from the second network device. For details of the auxiliary node addition request message and the auxiliary node addition request acknowledgement message, reference may be made to the foregoing description, and details are not described herein again.

Optionally, the terminal device may also have established EN-DC before step S201. That is, the terminal device establishes connection with both the first network device and the second network device. The first network device may perform step S201 according to actual circumstances (for example, in a case where the SCG configuration needs to be modified).

Optionally, the second network device supports a 5G communication system. Illustratively, the second network device may be a gNB.

S202, the terminal device determines that the second EN-DC frequency band combination cannot be followed (unavailable to complete with).

Illustratively, step S202 may be implemented as: the terminal device is not capable of complying with at least one parameter comprised by the EUTRA parameter in the second EN-DC band combination and/or the terminal device is not capable of complying with at least one parameter comprised by the NR parameter in the second EN-DC band combination.

Alternatively, "cannot comply" may be replaced with other descriptions, such as "cannot support" and the like, without limitation.

S203, the terminal equipment sends the failure information (SCG failure information) of the auxiliary cell group to the first network equipment. Correspondingly, the first network equipment receives the failure information of the auxiliary cell group sent by the terminal equipment.

Wherein the secondary cell group failure information is used to indicate that adding the secondary cell group failed.

Optionally, the secondary cell group failure information may further include a failure type. The failure type may also have other names, such as failure cause, and the like, which are not limited.

It should be understood that the terminal device sends the secondary cell group failure information to the first network device to trigger the network side to release/change the secondary cell group, but 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 information to the first network device, the terminal device is still in a connected state in the 4G network, so that it is ensured that a related service (e.g., VOLTE service or data service) of the terminal device in the 4G network can be normally processed.

Optionally, after step S203, the first network device may further send an RRC reconfiguration message to the terminal device, where the RRC reconfiguration message may be used to indicate to keep (keep), change (change), or release (release) the secondary cell group.

Based on the embodiment shown in fig. 6, in the EN-DC configuration procedure, if the second EN-DC frequency band combination configured for the terminal device by the first terminal device cannot be complied with by the terminal device, the terminal device sends the auxiliary cell group failure information to the first network device to indicate that the EN-DC configuration fails, and simultaneously avoids triggering the RRC reestablishment procedure. Therefore, the RRC reestablishment process is not triggered, so that the terminal device and the first network device can be ensured to maintain connection, and the normal communication between the terminal device and the first network device is further ensured.

Optionally, based on the embodiment shown in fig. 6, as shown in fig. 7, the communication method may further include step S204 after step S202.

S204, the terminal equipment sends RRC reconfiguration completion information to the first network equipment. Correspondingly, the first network device receives the RRC reconfiguration complete message from the terminal device.

Wherein, the RRC reconfiguration complete message is used to indicate that the RRC reconfiguration is complete.

Optionally, the embodiment of the present application does not limit the execution sequence between step S204 and step S203.

For example, if the terminal device has not established EN-DC before step S201, step S204 may be executed first, and then step S203 may be executed. It should be understood that the end device has not established EN-DC, meaning that the end device has not established SCG. Therefore, the terminal device sends the RRC reconfiguration complete message to the first network device first, so that the network side can know that the SCG is successfully established. And then, the terminal equipment sends a secondary cell group failure message to the first network equipment so as to trigger the network side to execute the SCG release/change process.

For example, if the terminal device has established EN-DC before step S201, step S203 may be executed first, and then step S204 may be executed.

Based on step S204, the terminal device sends an RRC reconfiguration complete message to the first network device, so as to normally complete an RRC reconfiguration procedure between the terminal device and the first network device. In this way, it is avoided that the first network device considers that the terminal device is abnormal because the first network device does not receive the response of the terminal device to the RRC reconfiguration message for a long time.

The following describes the embodiment shown in fig. 6 in detail with reference to a capability reporting process of the terminal device.

As shown in fig. 8, a communication method provided for the embodiment of the present application includes the following steps:

s301 (optional), the first network device sends capability inquiry (capability inquiry) information to the terminal device. Accordingly, the terminal device receives capability inquiry information from the first network device.

Wherein the capability inquiry information is used for requesting capability information of the terminal device.

S302, the terminal device sends the capability information to the first network device. Accordingly, the first network device receives the capability information from the terminal device.

Wherein the capability information is used to indicate the first EN-DC frequency band combination. The first EN-DC frequency band combination is an EN-DC frequency band combination supported by the terminal equipment.

Optionally, one or more first EN-DC frequency band combinations may be used, which is not limited in this embodiment of the application.

S303, the first network device sends an RRC reconfiguration message to the terminal device. Accordingly, the terminal device receives the RRC reconfiguration message from the first network device.

The description of step S303 may refer to the specific description of step S201 in fig. 6, and is not repeated here.

And S304, the terminal equipment determines that the second EN-DC frequency band combination is not matched with the first EN-DC frequency band combination.

Optionally, the second EN-DC frequency band combination does not match the first EN-DC frequency band combination, including one or more of:

in case one, the bands in the second EN-DC band combination do not match the bands in the first EN-DC band combination.

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

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

In case two, the bandwidth in the second EN-DC band combination is greater than the bandwidth in the first EN-DC band combination.

As a possible implementation manner, the bandwidth configured by the EUTRA parameter in the second EN-DC frequency band combination is greater than the bandwidth configured by the EUTRA parameter in the first EN-DC frequency band combination; and/or the bandwidth configured by the NR parameter in the second EN-DC frequency band combination is larger than the bandwidth configured by the NR parameter in the first EN-DC frequency band combination. Optionally, the bandwidth may be an uplink bandwidth or a downlink bandwidth.

And in case three, the maximum CC number in the second EN-DC frequency band combination is larger than the maximum CC number in the first EN-DC frequency band combination.

As a possible implementation manner, the maximum CC number configured by the EUTRA parameter in the second EN-DC frequency band combination is greater than the maximum CC number configured by the EUTRA parameter in the first EN-DC frequency band combination; and/or the maximum CC number configured by the NR parameter in the second EN-DC frequency band combination is different from the maximum CC number configured by the NR parameter in the first EN-DC frequency band combination.

For example, the frequency band in the first EN-DC frequency band combination is B3+ N78, the maximum CC number corresponding to B3 is 1, and the maximum CC number corresponding to N78 is 1. The frequency band in the second EN-DC frequency band combination is B3+ N78, the maximum CC number corresponding to B3 is 1, and the maximum CC number corresponding to N78 is 2. Since the maximum number of CCs corresponding to N78 in the first EN-DC frequency band combination is smaller than the maximum number of CCs corresponding to N78 in the second EN-DC frequency band combination, the second EN-DC frequency band combination is not matched with the first EN-DC frequency band combination.

Case four, the MIMO capability in the second EN-DC band combination does not match the MIMO capability in the first EN-DC band combination.

As a possible implementation manner, the MIMO capability configured by the EUTRA parameter in the second EN-DC frequency band combination is greater than the MIMO capability configured by the EUTRA parameter in the first EN-DC frequency band combination; and/or the MIMO capability configured by the NR parameter in the second EN-DC frequency band combination is larger than the MIMO capability configured by the NR parameter in the first EN-DC frequency band combination.

For example, the band in the first EN-DC band combination is B3+ N78, the MIMO capability corresponding to B3 is 2, and the MIMO capability corresponding to N78 is 4. The frequency band in the second EN-DC frequency band combination is B3+ N78, the MIMO capability corresponding to B3 is 4, and the MIMO capability corresponding to N78 is 4. Since the MIMO capability corresponding to B3 in the first EN-DC band combination is less than the MIMO capability corresponding to B3 in the second EN-DC band combination, the second EN-DC band combination is not matched to the first EN-DC band combination.

And in case five, the frequency points in the second EN-DC frequency band combination do not match the frequency points in the first EN-DC frequency band combination.

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

It will be appreciated that the second EN-DC band combination does not match the first EN-DC band combination, indicating that the terminal device cannot comply with the second EN-DC band combination.

S305, the terminal equipment sends the failure information of the secondary cell group to the first network equipment. Correspondingly, the first network equipment receives the failure information of the auxiliary cell group from the terminal equipment.

The description of step S305 may refer to the specific description of step S203 in fig. 6, and is not repeated herein.

Based on the embodiment shown in fig. 8, when the first EN-DC frequency band combination does not match the second EN-DC frequency band combination, the terminal device sends the auxiliary cell group failure information to the first network device to indicate that the EN-DC configuration fails, and simultaneously, the RRC reestablishment procedure is prevented from being triggered. Therefore, the RRC reestablishment process is not triggered, so that the terminal equipment and the first network equipment can be ensured to maintain connection, and the normal communication between the terminal equipment and the first network equipment is further ensured.

The scheme provided by the embodiment of the application is mainly introduced from the perspective of a method. It is understood that the terminal or the first network device, in order to implement the above functions, includes a corresponding hardware structure and/or software module for performing each function. The elements and algorithm steps of each example described in connection with the embodiments disclosed herein may be embodied as hardware or in a combination of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the subject matter of the embodiments of the present application.

In the embodiment of the present application, the communication apparatus may be divided into the functional units according to the method example, for example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit. It should be noted that the division of the unit in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation.

As shown in fig. 9, a communication device provided in the embodiment of the present application includes a processing module 301 and a communication module 302.

In a possible implementation manner, the communication apparatus is a terminal device or a part of the terminal device, and the processing module 301 is configured to generate a message (e.g., capability information, secondary cell group failure information, RRC reconfiguration complete message, etc.), and perform step S202 in fig. 6 and step S304 in fig. 8. The communication module 302 is configured to perform steps S201 and S203 in fig. 6, step S204 in fig. 7, and steps S301-S303, S305 in fig. 8.

Optionally, in combination with the terminal device shown in fig. 5, the communication module 302 in fig. 9 may be implemented by the transceiver 103 in fig. 5, and the processing module 301 in fig. 9 may be implemented by the processor 101 in fig. 5, which is not limited in this embodiment of the present application.

In another possible implementation, the communication apparatus is a network device or a part of a network device, and the processing module 301 is configured to generate a message (e.g., an RRC reconfiguration message, etc.). The communication module 302 is configured to perform steps S201 and S203 in fig. 6, step S204 in fig. 7, and steps S301-S303, S305 in fig. 8.

Optionally, in combination with the network device shown in fig. 5, the communication module 302 in fig. 9 may be implemented by the transceiver 203 in fig. 5, and the processing module 301 in fig. 9 may be implemented by the processor 201 in fig. 5, which is not limited in this embodiment of the present application.

Embodiments of the present application further provide a computer program product carrying computer instructions, which when executed on a computer, cause the computer to execute the method in fig. 6 to 8.

Embodiments of the present application also provide a computer-readable storage medium storing computer instructions, which, when executed on a computer, cause the computer to perform the methods in fig. 6 to 8.

An embodiment of the present application further provides a chip, including: processing circuitry and transceiver pins for implementing the methods of fig. 6-8 described above. The processing circuit is used for executing processing actions in the corresponding method, and the transceiving pin is used for executing receiving/transmitting actions in the corresponding method.

Those of ordinary skill in the art will understand that: in the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, it may 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 loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, 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 one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, including one or more integrated servers, data centers, and the like. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a Digital Video Disc (DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), among others.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one type of logical functional division, and other divisions may be realized in practice, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of some interfaces, devices or units, and may be an electric or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of devices. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each functional unit may exist independently, or two or more units may be integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

Through the description of the foregoing embodiments, those skilled in the art will clearly understand that the present application can be implemented by software plus necessary general hardware, and certainly can also be implemented by hardware, but in many cases, the former is a better embodiment. Based on such understanding, the technical solutions of the present application may be substantially implemented or a part of the technical solutions contributing to the prior art may be embodied in the form of a software product, where the computer software product is stored in a readable storage medium, such as a floppy disk, a hard disk, or an optical disk of a computer, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the methods described in the embodiments of the present application.

The above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and all changes and substitutions within the technical scope of the present application should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

A method of communication, the method comprising:

the terminal equipment sends capability information to the network equipment, wherein the capability information is used for indicating the combination of the dual-connection EN-DC frequency band between the first evolved universal terrestrial radio access network and the new air interface network;

the terminal equipment receives a Radio Resource Control (RRC) reconfiguration message sent by the network equipment, wherein the RRC reconfiguration message is used for indicating a second EN-DC frequency band combination;

and under the condition that the second EN-DC frequency band combination is not matched with the first EN-DC frequency band combination, the terminal equipment sends auxiliary cell group failure information to the network equipment.
The method of claim 1, wherein the second EN-DC frequency band combination does not match the first EN-DC frequency band combination, comprising at least one of:

a frequency band in the second EN-DC frequency band combination does not match a frequency band in the first EN-DC frequency band combination; or,

a bandwidth in the second EN-DC frequency band combination does not match a bandwidth in the first EN-DC frequency band combination; or,

the maximum number of carrier units in the second EN-DC frequency band combination does not match the maximum number of carrier units in the first EN-DC frequency band combination; or,

the multiple-input multiple-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 frequency band combination do not match the frequency points in the first EN-DC frequency band combination.
The method according to claim 1 or 2, wherein before the terminal device sends capability information to a network device, the method further comprises:

and the terminal equipment receives capability inquiry information sent by the network equipment, wherein the capability inquiry information is used for requesting the terminal equipment to report the capability information.
The method according to any of claims 1 to 3, wherein before the terminal device receives the RRC reconfiguration message sent by the network device, the method further comprises:

the terminal equipment receives measurement configuration information sent by the network equipment;

and the terminal equipment sends a measurement report to the network equipment.
The method according to any of claims 1 to 4, wherein the receiving, by the terminal device, the RRC reconfiguration message sent by the network device comprises:

and the terminal equipment receives the RRC reconfiguration message from the network equipment through a signaling radio bearer (SRB 1).
The method according to any one of claims 1 to 5, further comprising:

and the terminal equipment sends an RRC reconfiguration completion message to the network equipment.
The method according to any one of claims 1 to 6, wherein the network device supports a 4G communication standard.
A method of communication, the method comprising:

the method comprises the steps that network equipment receives capability information from terminal equipment, wherein the capability information is used for indicating a first EN-DC frequency band combination;

the network equipment sends an RRC reconfiguration message to the terminal equipment, wherein the RRC reconfiguration message is used for indicating a second EN-DC frequency band combination;

and the network equipment receives auxiliary cell group failure information from the terminal equipment under the condition that the second EN-DC frequency band combination does not match the first EN-DC frequency band combination.
The method of claim 8, wherein the second EN-DC band combination does not match the first EN-DC band combination, comprising at least one of:

a frequency band in the second EN-DC frequency band combination does not match a frequency band in the first EN-DC frequency band combination; or,

a bandwidth in the second EN-DC frequency band combination does not match a bandwidth in the first EN-DC frequency band combination; or,

the maximum number of carrier units in the second EN-DC frequency band combination does not match the maximum number of carrier units in the first EN-DC frequency 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 frequency band combination do not match the frequency points in the first EN-DC frequency band combination.
The method according to claim 8 or 9, wherein before the network device receives capability information from a terminal device, the method further comprises:

and the network equipment sends capability inquiry information to the terminal equipment, wherein the capability inquiry information is used for requesting the terminal equipment to report the capability information.
The method according to any of claims 8 to 10, wherein before the network device sends the RRC reconfiguration message to the terminal, the method further comprises:

the network equipment sends measurement configuration information to the terminal equipment;

the network device receives a measurement report from the terminal device.
The method according to any of claims 8 to 11, wherein the network device sends an RRC reconfiguration message to the terminal device, comprising:

and the network equipment sends the RRC reconfiguration message to the terminal equipment through SRB1.
The method according to any one of claims 8 to 12, further comprising:

and the network equipment receives the RRC reconfiguration complete message from the terminal equipment.
The method according to any one of claims 8 to 13, wherein the network device supports 4G communication standard.
A communications apparatus, comprising: a processing module and a communication module;

the communication module is used for sending capability information to network equipment, wherein the capability information is used for indicating a first EN-DC frequency band combination; receiving an RRC reconfiguration message sent by the network device, wherein the RRC reconfiguration message is used for 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.
The communications apparatus of claim 15, wherein the second EN-DC band combination does not match the first EN-DC band combination, comprising at least one of:

a frequency band in the second EN-DC frequency band combination does not match a frequency band in the first EN-DC frequency band combination; or,

a bandwidth in the second EN-DC frequency band combination does not match a bandwidth in the first EN-DC frequency band combination; or,

the maximum number of carrier units in the second EN-DC frequency band combination does not match the maximum number of carrier units in the first EN-DC frequency 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 frequency band combination do not match the frequency points in the first EN-DC frequency band combination.
The communication device according to claim 15 or 16,

the communication module is further configured to receive capability query information sent by the network device, where the capability query information is used to request reporting of the capability information.
The communication device according to any one of claims 15 to 17,

the communication module is further configured to receive measurement configuration information sent by the network device; sending a measurement report to the network device.
The communications apparatus according to any one of claims 15 to 18, wherein the communications module is configured to receive the RRC reconfiguration message sent by the network device, and includes:

receiving the RRC reconfiguration message from the network device through SRB1.
The communication device according to any one of claims 15 to 19,

the communication module is further configured to send an RRC reconfiguration complete message to the network device.
The apparatus according to any one of claims 15 to 20, wherein the network device supports a 4G communication system.
A communication device comprising a communication module and a processing module;

the communication module is used for receiving capability information from terminal equipment, and the capability information is used for indicating a first EN-DC frequency band combination;

the processing module is configured to generate an RRC reconfiguration message, where the RRC reconfiguration message is used to indicate a second EN-DC frequency band combination;

the communication module is further configured to send an RRC reconfiguration message to the terminal device; and receiving secondary cell group failure information from the terminal equipment under the condition that the second EN-DC frequency band combination is not matched with the first EN-DC frequency band combination.
The communications apparatus of claim 22, wherein the second EN-DC frequency band combination does not match the first EN-DC frequency band combination, comprising at least one of:

a frequency band in the second EN-DC frequency band combination does not match a frequency band in the first EN-DC frequency band combination; or,

a bandwidth in the second EN-DC frequency band combination does not match a bandwidth in the first EN-DC frequency band combination; or,

the maximum number of carrier units in the second EN-DC frequency band combination does not match the maximum number of carrier units in the first EN-DC frequency 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 frequency band combination do not match the frequency points in the first EN-DC frequency band combination.
The communication device according to claim 22 or 23,

the communication module is further configured to send capability query information to the terminal device, where the capability query information is used to request the terminal device to report the capability information.
The communication device according to any one of claims 22 to 24,

the communication module is further configured to send measurement configuration information to the terminal device; receiving a measurement report from the terminal device.
The communications apparatus according to any one of claims 22 to 25, wherein the communications module is configured to send an RRC reconfiguration message to the terminal device, and includes:

and sending the RRC reconfiguration message to the terminal equipment through SRB1.
The communication device according to any one of claims 22 to 26,

the communication module is further configured to receive an RRC reconfiguration complete message from the terminal device.
The apparatus according to any one of claims 22 to 27, wherein the apparatus is applied to a network device, and the network device supports a 4G communication system.
A communications device comprising a processor configured to perform processing operations in a method according to any one of claims 1 to 14 and a communications interface configured to perform communications operations in a method according to any one of claims 1 to 14.
A computer readable storage medium, comprising computer instructions which, when executed on a computer, cause the computer to perform the method of any of claims 1 to 14.
A computer program product, characterized in that it comprises computer instructions which, when run on a computer, cause the computer to perform the method of any one of claims 1 to 14.
A chip, comprising processing circuitry and transceiver pins; the processing circuit is configured to perform processing operations in the method of any one of claims 1 to 14, and the transceiver pin is configured to perform communication operations in the method of any one of claims 1 to 14.