CN111294982B

CN111294982B - Communication method and communication device

Info

Publication number: CN111294982B
Application number: CN201811502425.7A
Authority: CN
Inventors: 晋英豪; 韩锋; 谭巍
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-12-10
Filing date: 2018-12-10
Publication date: 2022-05-24
Anticipated expiration: 2038-12-10
Also published as: CN111294982A; WO2020119546A1

Abstract

The application provides a communication method and a communication device, wherein the method comprises the following steps: the distributed unit receives data sent by the terminal equipment in a deactivated state; the distributed unit determines first information corresponding to the data, wherein the first information corresponds to a data radio bearer; the distributed unit sends the first information to the central unit. The method provided by the embodiment of the application can reduce the signaling overhead of the terminal equipment in the inactive state in the data transmission process, reduce the time delay of data transmission and improve the efficiency of system data transmission.

Description

Communication method and communication device

Technical Field

The present application relates to the field of communications, and more particularly, to a communication method and a communication apparatus.

Background

In the fifth generation communication (5th generation,5G), a new base station architecture is defined, and a concept of separating a Centralized Unit (CU) and a Distributed Unit (DU) is introduced, that is, the base station is divided into two parts, namely, the CU and the DU.

Under the scenario of separating CU and DU, when a terminal device in some states, for example, a terminal device in a deactivated state (inactive) in 5G, transmits data, it needs to first switch to a connected state (connected) to transmit data. When the terminal equipment is switched to the connection state, a data tunnel needs to be established between the DU and the CU on the basis of the load. When the data transmission is performed in this way, the establishment of the data tunnel can be completed only through multiple signaling interactions between the DU and the CU, which may generate a large signaling overhead and also affect the time delay of data transmission.

Disclosure of Invention

The application provides a communication method and a communication device, which can reduce signaling overhead of terminal equipment in an inactive state in a data transmission process, reduce time delay of data transmission, and improve efficiency of system data transmission.

In a first aspect, a communication method is provided, and the communication method includes: the distributed unit receives data sent by the terminal equipment in a deactivated state; the distributed unit determines first information corresponding to the data, wherein the first information corresponds to a data radio bearer; the distributed unit sends the first information to the central unit.

According to the communication method in the embodiment of the application, the distributed unit receives data sent by the terminal equipment in a deactivated state, determines first information corresponding to the data, and sends the first information to the central unit, the central unit can determine a data radio bearer corresponding to the data according to the first information, and processes the data according to a protocol stack corresponding to the data radio bearer, so that the terminal equipment can transmit the data without switching from an inactive state to a connected state, signaling overhead of the terminal equipment in the inactive state in a data transmission process can be reduced, data transmission delay is reduced, and system data transmission efficiency is improved.

In one possible implementation, the first information includes at least one of: a logical channel identifier corresponding to the data, address information, or a network slice identifier corresponding to the data, wherein the address information includes at least one of: uplink data transmission address information corresponding to a data radio bearer identifier, uplink data transmission address information corresponding to the logical channel identifier, or uplink data transmission address information corresponding to the network slice identifier.

In one possible implementation, the sending, by the distributed unit, the first information to the central unit includes: and the distributed unit sends the first information to the central unit through an initial uplink radio resource control message transmission message.

According to the communication method in the embodiment of the application, the distributed unit sends the first information to the central unit through the control plane channel in the inactive state, and the control plane channel in the inactive state is used, so that the inactive state does not need to be switched to the connected state, and the efficiency of system data transmission can be improved.

In one possible implementation, the communication method further includes: the distributed unit receives second information sent by the central unit, wherein the second information is used for indicating at least one of the following items: the correspondence between the data radio bearer identifier and the address information, the correspondence between the logical channel identifier and the address information, or the correspondence between the network slice identifier and the address information.

In a possible implementation manner, the determining, by the distributed unit, first information corresponding to the data includes: and the distributed unit determines the address information according to the corresponding relation.

According to the communication method in the embodiment of the application, the distributed unit determines the address information according to the corresponding relationship, and sends data to the central unit in the data plane tunnel corresponding to the address information without switching to a connection state and then transmitting the data, so that signaling overhead and transmission delay in the data transmission process can be reduced, and the efficiency of system data transmission is improved.

In a possible implementation manner, the receiving, by the distributed unit, the second information sent by the central unit includes: and the distributed unit receives the second information sent by the central unit through an interface establishment reply message or a context release command message.

According to the communication method in the embodiment of the application, the distributed unit receives the second information sent by the central unit through the control plane channel in the inactive state, and the control plane channel in the inactive state is used, so that the inactive state does not need to be switched to the connected state, and the efficiency of system data transmission can be improved.

In one possible implementation, the sending, by the distributed unit, the first information to the central unit includes: the distributed unit sends the first information and the data to the central unit.

According to the communication method in the embodiment of the application, the distributed unit sends the first information and the data to the central unit, the central unit can determine the data radio bearer corresponding to the data according to the first information, and processes the data according to the protocol stack corresponding to the data radio bearer, so that the terminal equipment can transmit the data without switching from an inactive state to a connected state, thereby reducing signaling overhead of the terminal equipment in the inactive state in the data transmission process, reducing time delay of data transmission, and improving efficiency of system data transmission.

In one possible implementation, the communication method further includes: and the distributed unit receives third information sent by the central unit through a context establishment request message, wherein the third information is used for indicating the distributed unit to establish the data radio bearer.

According to the communication method in the embodiment of the application, the distributed unit receives the third information sent by the central unit, and according to the third information, the distributed unit can only establish the data radio bearer corresponding to the first information without establishing other data radio bearers, so that the signaling overhead and the time delay for establishing the data radio bearer can be reduced, the signaling overhead and the time delay in the data transmission process are reduced, and the efficiency of system data transmission is improved.

In a second aspect, a communication method is provided, which includes: the central unit receives first information sent by the distributed units; the central unit determines a data radio bearer corresponding to the first information according to the first information; and the central unit receives data sent by the terminal equipment in the deactivated state from the distributed units.

According to the communication method in the embodiment of the application, the central unit receives first information sent by the distributed unit, the central unit can determine the data radio bearer corresponding to the first information according to the first information, and after receiving data sent by the terminal equipment of the distributed unit in the deactivated state, the central unit can process the data according to a protocol stack corresponding to the data radio bearer, so that the terminal equipment can transmit the data without switching from the inactive state to the connected state, thereby reducing signaling overhead of the terminal equipment in the inactive state in the data transmission process, reducing time delay of data transmission and improving efficiency of system data transmission.

In one possible implementation, the first information includes at least one of: the logical channel identifier corresponding to the data, the address information, and the network slice identifier corresponding to the data, wherein the address information includes at least one of: uplink data transmission address information corresponding to the data radio bearer identifier, uplink data transmission address information corresponding to the logical channel identifier, or uplink data transmission address information corresponding to the network slice identifier.

In a possible implementation manner, the receiving, by the central unit, the first information sent by the distributed units includes: and the central unit receives the first information sent by the distributed unit through an initial uplink radio resource control message transmission message.

According to the communication method in the embodiment of the application, the central unit can receive the first information sent by the distributed unit through the control plane channel in the inactive state, and the control plane channel in the inactive state is used, so that the inactive state does not need to be switched to the connected state, and the efficiency of system data transmission can be improved.

In one possible implementation, the communication method further includes: the central unit sends second information to the distributed units, wherein the second information is used for indicating at least one of the following items: the corresponding relation between the data radio bearer identification and the address information, or the corresponding relation between the logical channel identification and the address information, or the corresponding relation between the network slice identification and the address information.

In one possible implementation, the sending, by the central unit, the second information to the distributed unit includes: and the central unit sends the second information to the distributed unit through an interface establishment reply message or a context release command message.

According to the communication method in the embodiment of the application, the central unit sends the second information to the distributed unit through a control plane channel in the inactive state, and data can be transmitted without switching from the inactive state to the connected state, so that the efficiency of system data transmission can be improved.

In a possible implementation manner, the receiving, by the central unit, the first information sent by the distributed units includes: and the central unit receives the first information and the data sent by the distributed unit.

According to the communication method in the embodiment of the application, the central unit receives the first information and the data sent by the distributed unit, and the central unit can determine the data radio bearer corresponding to the data according to the first information and process the data according to the protocol stack corresponding to the data radio bearer, so that the terminal equipment can transmit the data without switching from an inactive state to a connected state, thereby reducing signaling overhead of the terminal equipment in the inactive state in the data transmission process, reducing time delay of data transmission and improving efficiency of system data transmission.

In one possible implementation, the communication method further includes: and the central unit sends third information to the distributed units through context establishment request messages, wherein the third information is used for indicating the distributed units to establish the data radio bearer.

According to the communication method in the embodiment of the application, the central unit sends the third information to the distributed units, and the distributed units can only establish the data radio bearer corresponding to the first information according to the third information without establishing other data radio bearers, so that signaling overhead and time delay for establishing the data radio bearer can be reduced, signaling overhead and time delay in a data transmission process are reduced, and efficiency of system data transmission is improved.

In one possible implementation, the central unit includes CU-UP and CU-CP.

In one possible implementation, the communication method further includes: the CU-UP sends the second information to the CU-CP.

According to the communication method in the embodiment of the application, the CU-CP receives the second information sent by the CU-UP, and sends the second information to the distributed unit, accordingly, the distributed unit can determine the address information according to the corresponding relation in the second information, and sends data to the CU-CP in the data plane tunnel corresponding to the address information without switching to a connection state and then transmitting the data, so that signaling overhead and transmission delay in the data transmission process can be reduced, and the efficiency of system data transmission is improved.

In one possible implementation, the communication method further includes: the CU-CP sending the first information to the CU-UP.

According to the communication method in the embodiment of the application, the CU-UP receives the first information sent by the CU-CP, and the CU-UP can determine the data radio bearer corresponding to the data according to the first information and process the data according to the protocol stack corresponding to the data radio bearer, so that the terminal device can transmit the data without switching from an inactive state to a connected state, which can reduce signaling overhead in the data transmission process, reduce delay of data transmission, and improve efficiency of system data transmission.

In a third aspect, a communication apparatus is provided, which includes: the receiving module is used for receiving data sent by the terminal equipment in a deactivated state; the processing module is used for determining first information corresponding to the data, and the first information corresponds to a data radio bearer; and the sending module is used for sending the first information to the central unit.

According to the communication device in the embodiment of the application, the communication device receives data sent by terminal equipment in a deactivated state, determines first information corresponding to the data, and sends the first information to the central unit, the central unit can determine data radio bearer corresponding to the data according to the first information, and processes the data according to a protocol stack corresponding to the data radio bearer, so that the terminal equipment can transmit the data without switching from an inactive state to a connected state, signaling overhead of the terminal equipment in the inactive state in a data transmission process can be reduced, time delay of data transmission is reduced, and efficiency of system data transmission is improved.

In one possible implementation, the first information includes at least one of: a logical channel identifier, address information, or a network slice identifier corresponding to the data, wherein the address information includes at least one of: uplink data transmission address information corresponding to a data radio bearer identifier, uplink data transmission address information corresponding to the logical channel identifier, or uplink data transmission address information corresponding to the network slice identifier.

In a possible implementation manner, the sending module is specifically configured to: and sending the first information to the central unit through an initial uplink radio resource control message transmission message.

According to the communication device in the embodiment of the application, the communication device sends the first information to the central unit through the control plane channel in the inactive state, and the control plane channel in the inactive state is used, so that the inactive state does not need to be switched to the connected state, and the efficiency of system data transmission can be improved.

In one possible implementation manner, the receiving module is further configured to: receiving second information sent by the central unit, wherein the second information is used for indicating at least one of the following items: the correspondence between the data radio bearer identifier and the address information, the correspondence between the logical channel identifier and the address information, or the correspondence between the network slice identifier and the address information.

In a possible implementation manner, the processing module is specifically configured to: and determining the address information according to the corresponding relation.

According to the communication device in the embodiment of the application, the communication device determines the address information according to the corresponding relationship, and sends data to the central unit in the data plane tunnel corresponding to the address information according to the address information without switching to a connection state and then transmitting the data, so that signaling overhead and transmission delay in a data transmission process can be reduced, and the efficiency of system data transmission is improved.

In a possible implementation manner, the receiving module is specifically configured to: and receiving the second information sent by the central unit through an interface establishment reply message or a context release command message.

According to the communication device in the embodiment of the application, the communication device receives the second information sent by the central unit through the control plane channel in the inactive state, and the control plane channel in the inactive state is used, so that the inactive state does not need to be switched to the connected state, and the efficiency of system data transmission can be improved.

In a possible implementation manner, the sending module is specifically configured to: sending the first information and the data to the central unit.

According to the communication device in the embodiment of the application, the communication device sends the first information and the data to the central unit, the central unit can determine the data radio bearer corresponding to the data according to the first information, and processes the data according to the protocol stack corresponding to the data radio bearer, so that the terminal equipment can transmit the data without switching from the inactive state to the connected state, thereby reducing the signaling overhead of the terminal equipment in the inactive state in the data transmission process, reducing the time delay of data transmission and improving the efficiency of system data transmission.

In one possible implementation manner, the receiving module is further configured to: and receiving third information sent by the central unit through a context establishment request message, wherein the third information is used for indicating the distributed unit to establish the data radio bearer.

According to the communication device in the embodiment of the application, the communication device receives the third information sent by the central unit, and the communication device can only establish the data radio bearer corresponding to the first information according to the third information without establishing other data radio bearers, so that the signaling overhead and the time delay for establishing the data radio bearer can be reduced, the signaling overhead and the time delay in the data transmission process are reduced, and the efficiency of system data transmission is improved.

In a fourth aspect, there is provided a communication apparatus comprising: the receiving module is used for receiving first information sent by the distributed unit; the processing module is used for determining a data radio bearer corresponding to the first information according to the first information; the receiving module is configured to receive data sent by the terminal device in the deactivated state from the distributed unit.

According to the communication device in the embodiment of the application, the communication device receives first information sent by a distributed unit, the communication device can determine a data radio bearer corresponding to the first information according to the first information, and after receiving data sent by terminal equipment of the distributed unit in a deactivated state, the communication device can process the data according to a protocol stack corresponding to the data radio bearer, so that the terminal equipment can transmit the data without switching from an inactive state to a connected state, thereby reducing signaling overhead of the terminal equipment in the inactive state in a data transmission process, reducing time delay of data transmission and improving efficiency of system data transmission.

In a possible implementation manner, the receiving module is specifically configured to: and receiving the first information sent by the distributed unit through an initial uplink radio resource control message transmission message.

According to the communication device in the embodiment of the application, the communication device can receive the first information sent by the distributed unit through the control plane channel in the inactive state, and the control plane channel in the inactive state is used, so that the inactive state does not need to be switched to the connected state, and the efficiency of system data transmission can be improved.

In a possible implementation manner, the communication apparatus further includes a sending module, configured to: sending second information to the distributed unit, the second information indicating at least one of: the corresponding relation between the data radio bearer identification and the address information, or the corresponding relation between the logical channel identification and the address information, or the corresponding relation between the network slice identification and the address information.

In a possible implementation manner, the sending module is specifically configured to: and sending the second information to the distributed unit through an interface establishment reply message or a context release command message.

According to the communication device in the embodiment of the application, the communication device sends the second information to the distributed unit through the control plane channel in the inactive state, and data can be transmitted without switching from the inactive state to the connected state, so that the efficiency of system data transmission can be improved.

In a possible implementation manner, the receiving module is specifically configured to: and receiving the first information and the data sent by the distributed unit.

According to the communication device in the embodiment of the application, the communication device receives the first information and the data sent by the distributed unit, the communication device can determine the data radio bearer corresponding to the data according to the first information, and process the data according to the protocol stack corresponding to the data radio bearer, so that the terminal equipment can transmit the data without switching from an inactive state to a connected state, thereby reducing signaling overhead of the terminal equipment in the inactive state in the data transmission process, reducing time delay of data transmission, and improving efficiency of system data transmission.

In one possible implementation manner, the sending module is further configured to: and sending third information to the distributed unit through a context establishment request message, wherein the third information is used for indicating the distributed unit to establish the data radio bearer.

According to the communication device in the embodiment of the application, the communication device sends the third information to the distributed unit, and the distributed unit can only establish the data radio bearer corresponding to the first information according to the third information without establishing other data radio bearers, so that signaling overhead and time delay for establishing the data radio bearer can be reduced, signaling overhead and time delay in a data transmission process are reduced, and efficiency of system data transmission is improved.

In one possible implementation, the communication device includes a CU-UP and a CU-CP.

In one possible implementation, the sending module belongs to the CU-UP, and the sending module is further configured to: the CU-UP sends the second information to the CU-CP.

According to the communication device in the embodiment of the present application, the CU-CP receives the second information sent by the CU-UP, and sends the second information to the distributed unit, and accordingly, the distributed unit may determine the address information according to the corresponding relationship in the second information, and send data to the CU-CP in the data plane tunnel corresponding to the address information according to the address information, without switching to a connection state and then transmitting the data, so that signaling overhead and transmission delay in a data transmission process can be reduced, and efficiency of system data transmission can be improved.

In a possible implementation manner, the sending module belongs to the CU-CP, and is further configured to: the CU-CP sending the first information to the CU-UP.

According to the communication device in the embodiment of the present application, the CU-UP receives the first information sent by the CU-CP, and the CU-UP may determine a data radio bearer corresponding to the data according to the first information and process the data according to a protocol stack corresponding to the data radio bearer, so that the terminal device may transmit the data without switching from an inactive state to a connected state, which may reduce signaling overhead in a data transmission process, reduce a delay of data transmission, and improve efficiency of system data transmission.

In a fifth aspect, a communication apparatus is provided, which includes: the receiver is used for receiving data sent by the terminal equipment in a deactivated state; a processor configured to determine first information corresponding to the data, the first information corresponding to a data radio bearer; a transmitter for transmitting the first information to the central unit.

In one possible implementation, the transmitter is specifically configured to: and sending the first information to the central unit through an initial uplink radio resource control message transmission message.

In one possible implementation, the receiver is further configured to: receiving second information sent by the central unit, wherein the second information is used for indicating at least one of the following items: the correspondence between the data radio bearer identifier and the address information, the correspondence between the logical channel identifier and the address information, or the correspondence between the network slice identifier and the address information.

In one possible implementation, the processor is specifically configured to: and determining the address information according to the corresponding relation.

According to the communication device in the embodiment of the application, the communication device determines the address information according to the corresponding relationship, and sends data to the central unit in the data plane tunnel corresponding to the address information according to the address information without switching to a connection state and then transmitting the data, so that signaling overhead and transmission delay in the data transmission process can be reduced, and the efficiency of system data transmission is improved.

In one possible implementation, the receiver is specifically configured to: and receiving the second information sent by the central unit through an interface establishment reply message or a context release command message.

In one possible implementation, the transmitter is specifically configured to: sending the first information and the data to the central unit.

In one possible implementation, the receiver is further configured to: and receiving third information sent by the central unit through a context establishment request message, wherein the third information is used for indicating the distributed unit to establish the data radio bearer.

The respective modules included in the communication apparatus in the fifth aspect may be implemented by software and/or hardware.

Alternatively, the communication device of the fifth aspect may further include a memory for storing program instructions executed by the processor, or even for storing various data.

Optionally, the communication apparatus in the fifth aspect may be a chip capable of being integrated in a smart device, and in this case, the communication apparatus may further include a communication interface.

In a sixth aspect, a communication apparatus is provided, which includes: the receiver is used for receiving first information sent by the distributed unit; the processor is used for determining a data radio bearer corresponding to the first information according to the first information; and the receiver is used for receiving the data sent by the terminal equipment from the distributed unit in the deactivated state.

In one possible implementation, the receiver is specifically configured to: and receiving the first information sent by the distributed unit through an initial uplink radio resource control message transmission message.

In one possible implementation, the communication device further includes a transmitter configured to: sending second information to the distributed unit, the second information indicating at least one of: the corresponding relation between the data radio bearer identification and the address information, or the corresponding relation between the logical channel identification and the address information, or the corresponding relation between the network slice identification and the address information.

In one possible implementation, the transmitter is specifically configured to: and sending the second information to the distributed unit through an interface establishment reply message or a context release command message.

According to the communication device in the embodiment of the present application, the communication device sends the second information to the distributed unit through the control plane channel in the inactive state, and data can be transmitted without switching from the inactive state to the connected state, so that the efficiency of system data transmission can be improved.

In one possible implementation, the receiver is specifically configured to: and receiving the first information and the data sent by the distributed unit.

In one possible implementation, the transmitter is further configured to: and sending third information to the distributed unit through a context establishment request message, wherein the third information is used for indicating the distributed unit to establish the data radio bearer.

In one possible implementation, the sender belongs to the CU-UP, the sender further configured to: the CU-UP sends the second information to the CU-CP.

In one possible implementation, the transmitter belongs to the CU-CP, and the transmitter is further configured to: the CU-CP sending the first information to the CU-UP.

The respective modules included in the communication apparatus in the sixth aspect may be implemented by software and/or hardware.

Alternatively, the communication device of the sixth aspect may further comprise a memory for storing program instructions executed by the processor, or even for storing various data.

Optionally, the communication apparatus in the sixth aspect may be a chip capable of being integrated in a smart device, and in this case, the communication apparatus may further include a communication interface.

In a seventh aspect, the present application provides a computer-readable storage medium. The computer readable storage medium has stored therein program code for execution by the communication device. The program code comprises instructions for carrying out the communication method of the first aspect or any one of its possible implementations.

In an eighth aspect, the present application provides a computer-readable storage medium. The computer readable storage medium has stored therein program code for execution by the communication device. The program code comprises instructions for carrying out the communication method of the second aspect or any one of its possible implementations.

In a ninth aspect, the present application provides a computer program product comprising instructions. The computer program product, when run on a communication apparatus, causes the communication apparatus to perform the method of the first aspect or any one of its possible implementations.

In a tenth aspect, the present application provides a computer program product comprising instructions. The computer program product, when run on a communication apparatus, causes the communication apparatus to perform the method of the second aspect or any one of its possible implementations.

Drawings

Fig. 1 is a schematic diagram of an application scenario of the technical solution of the embodiment of the present application.

Fig. 2 is a schematic diagram of another application scenario of the technical solution of the embodiment of the present application.

Fig. 3 is a schematic diagram of another application scenario of the technical solution of the embodiment of the present application.

Fig. 4 is a schematic diagram of another application scenario of the technical solution of the embodiment of the present application.

Fig. 5 is a schematic flow chart of a communication method according to an embodiment of the present application.

Fig. 6 is a schematic flow chart of a communication method according to another embodiment of the present application.

Fig. 7 is a schematic flow chart of a communication method according to another embodiment of the present application.

Fig. 8 is a schematic flow chart of a communication method according to another embodiment of the present application.

Fig. 9 is a schematic flow chart of a communication method according to another embodiment of the present application.

Fig. 10 is a schematic flow chart of a communication method according to another embodiment of the present application.

Fig. 11 is a schematic configuration diagram of a communication apparatus according to an embodiment of the present application.

Fig. 12 is a schematic configuration diagram of a communication apparatus according to another embodiment of the present application.

Fig. 13 is a schematic configuration diagram of a communication apparatus according to another embodiment of the present application.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

The embodiment of the present application is applicable to various forms of systems including separation of partial functions in network devices, and fig. 1 shows a schematic view of an application scenario of the technical solution of the embodiment of the present application, and as shown in fig. 1, a partial function in the network device is separated into a first network node and a second network node.

Specifically, fig. 2 is a schematic diagram illustrating another application scenario of the technical solution of the embodiment of the present application, and in the communication system in fig. 2, a CU-DU partition is introduced, where the DU may correspond to the first network node in fig. 1, and the CU corresponds to the second network node in fig. 1.

It should be understood that the first network node and the second network node may be two physically or logically separate modules in an overall network architecture, or may be two completely independent logical network elements.

It is also to be understood that the second network node may perform a control plane and user plane separation, forming a user plane of the second network node and a control plane of the second network node.

The CU has Radio Resource Control (RRC) or partial RRC control functions, and includes all protocol layer functions or partial protocol layer functions of the existing base station; for example, the RRC layer may include only an RRC function or a part of the RRC function, or include an RRC function or a Service Data Adaptation Protocol (SDAP) layer function, or include an RRC/Packet Data Convergence Protocol (PDCP) layer function, or include an RRC/PDCP and a part of a radio link layer control protocol (RLC) layer function; or include RRC/PDCP/Media Access Control (MAC) layers, or even some or all of the physical layer PHY functions, without excluding any other possibilities.

The DU has all protocol layer functions of the existing base station except for the protocol layer functions of the CU, that is, a part of protocol layer function units of RRC/SDAP/PDCP/RLC/MAC/PHY, for example, includes a part of RRC functions and protocol layer functions such as PDCP/RLC/MAC/PHY, or includes protocol layer functions such as RLC/MAC/PHY, or includes a part of RLC/MAC/PHY functions, or includes only all or part of PHY functions; it should be noted that the functionality of the various protocol layers mentioned herein may vary and are within the scope of the present application. For example, the DU has all the protocol layer functions of the existing base station.

Illustratively, the functions of PDCP and above protocol layers are set in the CU, and the functions of protocol layers below PDCP, such as RLC and MAC, are set in the DU. Of course, this division of the protocol layers is only an example, and it is also possible to divide the protocol layers at other protocol layers, for example, at the RLC layer, and the functions of the RLC layer and the protocol layers above are set in the CU, and the functions of the protocol layers below the RLC layer are set in the DU. Alternatively, the functions are divided into some protocol layers, for example, a part of the functions of the RLC layer and the functions of the protocol layers above the RLC layer are provided in the CU, and the remaining functions of the RLC layer and the functions of the protocol layers below the RLC layer are provided in the DU. In addition, the processing time may be divided in other manners, for example, by time delay, a function that needs to satisfy the time delay requirement for processing is provided in the DU, and a function that does not need to satisfy the time delay requirement is provided in the CU. In addition, the radio frequency device may be pulled away, not placed in the DU, or integrated in the DU, or partially pulled away and partially integrated in the DU, which is not limited herein.

For another example, in a 5G network, a new type of relay node also has a new technical development, for example, the relay node is only deployed with a protocol stack architecture of layer 2 (e.g., including a Radio Link Control (RLC) layer, a MAC layer, etc.) and layer 1 (e.g., including a PHY layer), and not deployed with all protocol stack functions above layer 2, such as all RRC layer functions. Therefore, data or signaling generated by the donor base station needs to be forwarded to the terminal device by the relay node.

It should be understood that the first network node in the embodiment of the present application may correspond to a DU in a CU-DU architecture and also correspond to the relay node, and the second network node may correspond to a CU in the CU-DU architecture and also correspond to the donor base station.

Fig. 3 shows a schematic diagram of another application scenario of the technical solution of the embodiment of the present application, as shown in fig. 3, a network device may include a CU and at least one DU, where a current third generation partnership project (3 GPP) sets an interface between CUs in different network devices to be Xn-C, an interface between the CU and a 5G core network (5G core network, 5GC) to be Ng, an interface between the CU and the DU is named as F1, an interface F1 includes a Control Plane (CP) and a User Plane (UP), a transport layer protocol of the control plane is Stream Control Transmission Protocol (SCTP), and a transmitted application layer message is an F1AP (application protocol) message. The transport layer protocol of the user plane is a GPRS tunneling protocol-user plane (GTP-U) of the user plane.

Fig. 4 is a schematic diagram illustrating still another application scenario of the technical solution of the embodiment of the present application, and as shown in fig. 4, when a CU is separated from a control plane, an E1 interface is an interface between the CU-CP and the CU-UP, an F1-U connection is between the CU-UP and the DU, an F1-C connection is between the CU-CP and the DU, an Ng-U connection is between the CU-UP and the 5GC, and an Ng-C connection is between the CU-CP and the 5 GC.

It should be understood that the technical solutions of the embodiments of the present application may be applied to various communication systems, for example: global system for mobile communications (GSM) systems, Code Division Multiple Access (CDMA) systems, Wideband Code Division Multiple Access (WCDMA) systems, General Packet Radio Service (GPRS), Long Term Evolution (LTE) systems, LTE Frequency Division Duplex (FDD) systems, LTE Time Division Duplex (TDD), universal mobile telecommunications system (universal mobile telecommunications system, UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication systems, future fifth generation (5G) systems, new radio systems (NR) systems, and the like, and systems with separate or similar communication principles.

The network device in this embodiment may be a device for communicating with a terminal device, where the network device may be a Base Transceiver Station (BTS) in a global system for mobile communications (GSM) system or a Code Division Multiple Access (CDMA) system, may also be a base station (NodeB) in a Wideband Code Division Multiple Access (WCDMA) system, may also be an evolved NodeB (eNB) or eNodeB) in an LTE system, may also be a wireless controller in a Cloud Radio Access Network (CRAN) scenario, or may be a relay station, an access point, a vehicle-mounted device, a wearable device, a network device in a future 5G network, or a network device in a future evolved PLMN network, and the like, and the present embodiment is not limited.

In particular, in the UMTS system in the third Generation mobile communication technology (3rd-Generation, 3G), there is a scenario in which a radio network control node and a base station are separated; in the LTE system, there is a scenario in which a baseband module and a radio frequency module are separated, that is, a radio remote scenario; data Center (DC) scenarios, which require an interconnection between two different networks; the method comprises the following steps that in a large station scene, interfaces exist in the large station and the small station which are connected with each other; an LTE-Wifi aggregation (LWA) scenario; in a 5G system, various non-cell (non-cell) scenes exist (a terminal can be freely switched among cells, and no clear boundary line exists among the cells), a control node is connected with all the cells, or each transmission node is connected below the cells; a CRAN scene, wherein a BBU cut scene exists; in a CRAN virtualization scene, a certain part of functions of BBUs are deployed in a centralized mode, virtualization is carried out, the other part of functions are deployed in a separated mode, and the possibility of physical separated deployment exists between the two parts; it should be understood that different system/system coexistence scenarios are within the scope of applicability of the present application.

A terminal device in this embodiment may refer to a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment. The terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G network or a terminal device in a future evolved Public Land Mobile Network (PLMN), and the like, which are not limited in this embodiment.

It is understood that there may be different service scenarios in the communication network, and the network device and/or the terminal device may have corresponding forms in different service scenarios, which is not limited in this application.

For example, 5G includes three typical service scenarios:

one is enhanced mobile broadband. Under the application scene, the internet peak rate of the intelligent terminal user needs to reach 10Gbps or even 20Gbps, and the method provides support for large-bandwidth application such as virtual reality, ubiquitous video live broadcast and sharing, cloud access anytime and anywhere and the like.

Secondly, the internet of things is connected greatly. In this scenario, a 5G network needs to support connections for people and things on the scale of 100 kilometres per square metre.

And thirdly, low-delay and ultra-reliable communication. The scene requires that the time delay of the 5G network reaches 1 millisecond, and provides powerful support for low-time-delay services such as intelligent manufacturing, remote mechanical control, auxiliary driving and automatic driving.

In the embodiment of the application, the terminal device or the network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. The hardware layer includes hardware such as a Central Processing Unit (CPU), a Memory Management Unit (MMU), and a memory (also referred to as a main memory). The operating system may be any one or more computer operating systems that implement business processing through processes (processes), such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system. The application layer comprises applications such as a browser, an address list, word processing software, instant messaging software and the like. Furthermore, the embodiment of the present application does not particularly limit the specific structure of the execution main body of the method provided by the embodiment of the present application, as long as the communication can be performed according to the method provided by the embodiment of the present application by running the program recorded with the code of the method provided by the embodiment of the present application, for example, the execution main body of the method provided by the embodiment of the present application may be a terminal device or a network device, or a functional module capable of calling the program and executing the program in the terminal device or the network device.

In addition, various aspects or features of the present application may be implemented as a method, apparatus, or article of manufacture using standard programming and/or engineering techniques. The term "article of manufacture" as used herein is intended to encompass a computer program accessible from any computer-readable device, carrier, or media. For example, computer-readable media can include but are not limited to magnetic storage devices (e.g., hard disk, floppy disk, magnetic strips, etc.), optical disks (e.g., Compact Disk (CD), Digital Versatile Disk (DVD), etc.), smart cards, and flash memory devices (e.g., erasable programmable read-only memory (EPROM), card, stick, or key drive, etc.). In addition, various storage media described herein can represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" can include, without being limited to, wireless channels and various other media capable of storing, containing, and/or carrying instruction(s) and/or data.

In 5G, a new RRC state, called deactivated state (inactive), is introduced for the terminal device. The terminal device in the inactive state suspends the connection between the terminal device and the network device, and at this time, an Access Stratum (AS) context of the terminal device is simultaneously saved on the terminal device side and the network side. When the terminal equipment needs to send data or the network side needs the terminal equipment to receive the data, the terminal equipment requests the network equipment to recover the connection. When the terminal device is switched from the inactive state to the connected state, the link between the network device and the core network control plane may not be reactivated.

Under the CU-DU architecture, the process of the terminal device switching from the connected state to the inactive state may include the following steps:

(1) the CU sends a UE context release command (UE context release command) message to the DU, which is used for the DU to release the context of the terminal device. Particularly, if the network side determines to convert the connected UE into the Inactive state, the DU does not reserve the context of the terminal device, and all the contexts are stored in the CU;

(2) the DU sends RRC connection release (RRC connection release) information to the terminal equipment, and correspondingly, after the terminal equipment receives the RRC connection release information, if the RRC connection release information comprises suspend (suspend) configuration information, the terminal equipment enters an Inactive state; if the RRC connection release message does not include suspend configuration information, entering an idle state (idle);

(3) the DU sends a UE context release complete message to the CUs.

When the terminal equipment in the Inactive state needs to send data or the network side needs the terminal equipment to receive data, the terminal equipment needs to be switched from the Inactive state to the connected state. Taking downlink transmission as an example, under the CU-DU architecture, the procedure for switching the terminal device from the inactive state to the connected state may include the following steps:

(1) if the core network has downlink data, the CU sends a paging message to the DU;

(2) after receiving the paging message, the DU sends the paging message to the terminal equipment through an air interface (air interface);

(3) the terminal equipment sends an RRC connection resume request (RRC connection resume request) message or an RRC resume request (RRC resume request) message to the DU;

(4) after receiving an RRC connection recovery request message or an RRC recovery request message sent by a terminal device, a DU sends the request message to a CU through an initial UL RRC message transfer (initial UL RRC message transfer) message;

(5) if the terminal equipment is determined to be switched to the connection state (for example, data needs to be sent), the CU sends a UE context setup request (UE context setup request) message to the DU, wherein the request message comprises information such as bearer and the like which need to be established;

(6) the DU sends a UE context setup reply (UE context response) message to the CU to inform the CU that the CU successfully establishes the bearer;

(7) the CU sends a downlink RRC message transfer (DL RRC message transfer) message to the DU, the message including the RRC message transmitted in step 8;

(8) the DU sends an RRC connection recovery request message or an RRC connection request message to the terminal equipment, and is used for setting the terminal equipment to be in a connection state; or RRC reject (RRC reject) message, which indicates that the access of the terminal equipment is not successful and the terminal equipment is still in an Inactive state after receiving the message; or an RRC setup (RRC setup) message, where the CU has no context of the terminal device, but the terminal device may still switch to a connected state after receiving the message; or an RRC release (RRC release) message, wherein if the message comprises a suspend configuration message, the terminal equipment is in an inactive state, otherwise, the terminal equipment is switched to an idle state;

(9) the terminal equipment sends an RRC resume/setup complete (RRC resume/setup complete) message to the DU, for replying to the message in step 8;

(10) the DU sends an uplink RRC message transfer (UL RRC message transfer) message to the CUs. At this time, the bearer establishment is completed, and the terminal device enters a connected state and can perform data transmission with the network device.

In the above procedure of switching from inactive state to connected state, the terminal device needs to go through the above 10 steps to switch to the connected state, that is, the terminal device can perform data transmission after step (10). The above procedure can also be applied to a scenario where inactive initiates an RRC recovery procedure in a new DU.

Therefore, when the terminal device in the inactive state performs data transmission through the above procedure, a large signaling overhead is generated, and since data transmission can be performed only after step (10), the delay of data transmission is also affected.

In order to solve the above problems, the present application provides a communication method, which can reduce signaling overhead of the terminal device in an inactive state during data transmission, reduce time delay of data transmission, and improve efficiency of system data transmission.

Fig. 5 shows a schematic flow chart of a communication method 500 of an embodiment of the present application, and as shown in fig. 5, the communication method 500 includes:

s510, the terminal device sends data to the DU in the deactivated state.

Optionally, the data may correspond to a certain Data Radio Bearer (DRB). For example, the terminal in the deactivated state may retain configuration information DRB #1, DRB #2, and DRB #3 of 3 DRBs, and if the data transmitted by the user is data of DRB #1, the data may be transmitted by using the configuration of DRB # 1.

Optionally, the terminal device may send the data to the DU through an RRC connection recovery request message or an RRC recovery request message in an inactive state.

S520, the DU determines first information corresponding to the data, and the first information corresponds to the DRB.

Optionally, the first information may include at least one of: a Logical Channel Identity (LCID) corresponding to the data, address information, or a network slice identity corresponding to the data, wherein the address information includes at least one of: uplink data transmission address information corresponding to the data radio bearer identifier, uplink data transmission address information corresponding to the logical channel identifier, or uplink data transmission address information corresponding to the network slice identifier.

Optionally, the first information may be an LCID or a network slice identity. The determining, by the DU, the first information corresponding to the data means that the DU can determine, through the MAC layer, an LCID or a network slice identifier corresponding to the data. The first information corresponds to the DRB, which may mean that the CU determines the corresponding DRB according to the first information, for example, may determine the corresponding DRB identifier.

Taking the first information as a logical channel identifier as an example, for example, if the data is a data packet, the CU may determine a DRB identifier of the terminal device according to the logical channel identifier corresponding to the data packet; or, if the data includes a plurality of data packets, where the plurality of data packets respectively correspond to a plurality of different logical channel identifiers, the CU may determine a DRB identifier of the terminal device according to one logical channel identifier of the plurality of different logical channel identifiers; or, if the plurality of data packets correspond to a logical channel identifier, the CU may determine a DRB identifier of the terminal device according to the logical channel identifier.

Optionally, the DU may determine first information corresponding to the data in a MAC layer, for example, the first information may be a logical channel identifier.

S530, the DU sends the first information to the CU.

In this embodiment, the DU may send the first information to the CU through a first message. The first message may be an initial UL RRC message transmission (initial UL RRC message transfer), or the first message may also be another message, which is not limited in this application.

Optionally, the first message may further include the data. The DU may send the first information and the data to the CU simultaneously through a first message, for example, the DU may send the first information and the data to the CU simultaneously through the same initial uplink RRC message; the DU may also send only the first information to the CUs in one message and the data to the CUs in another message, e.g., the DU may send the first information to the CUs simultaneously in one initial uplink RRC message and the data to the CUs in another initial uplink RRC message or other message.

Illustratively, if the first information and the data are sent in an initial uplink RRC message transmission message at the same time, one possible form is:

data List (Data List)

> > said first information (LCID)

> > the Data (Data)

Wherein the data list indicates that the DU may send one or more data packets in the first message, and the data packets may be carried in the first message in the form of containers. It is understood that the data list is only one name, and may be other names. The LCID may be a logical channel identifier, which indicates a logical channel identifier corresponding to the data packet, and the CU may correspond the data packet to a corresponding DRB through the LCID, and then process the data packet by using the PDCP layer protocol stack and the SDAP layer protocol stack corresponding to the bearer. Data may be Data transmitted from the terminal to the DU in S510, and the Data may be one packet or a plurality of packets. It is understood that each LCID may correspond to a plurality of packets, or may correspond to a single packet.

S540, the CU determines the DRB corresponding to the data according to the first information.

Optionally, the CU may process the data by using a PDCP layer protocol stack and an SDAP layer protocol stack corresponding to the bearer.

For example, the CU may correspond the data packet to a corresponding DRB through a logical channel identifier, and then process the data packet by using a PDCP layer protocol stack and an SDAP layer protocol stack corresponding to the DRB.

S550, the CU sends an RRC message to the DU.

The RRC message may be an RRC connection release (RRC connection release) message or an RRC release (RRC release) message.

Alternatively, the RRC message may be an RRC connection recovery (RRC connection resume) message or an RRC recovery (RRC resume) message.

S560, the DU sends the RRC message to the terminal device.

Wherein the RRC message may be an RRC connection release message or an RRC release message. Optionally, the network side may set the terminal device in a deactivated state or an idle state through the message.

Alternatively, the RRC message may be an RRC connection recovery message or an RRC recovery message. Optionally, the network side may set the terminal device in a connected state through the message.

Fig. 6 shows a schematic flow chart of a communication method 600 of another embodiment of the present application. As shown in fig. 6, the communication method 600 includes:

s610, the CU sends second information to the DU.

Alternatively, the CU may send the second information to the DU through a UE context release command (UE context release command) message.

In this application, the second information may be used to indicate a correspondence between a logical channel identifier and address information, a correspondence between a DRB identifier and address information, or a correspondence between a network slice identifier and address information. Optionally, the second information may also be used to indicate a correspondence between another identifier and the address information. Alternatively, the second information may be used to indicate address information, which is not limited in this application.

Optionally, the address information may refer to uplink data transmission address information for transmitting the logical channel, the DRB, or the network slice. Wherein different logical channels, DRBs or network slices may correspond to different addresses.

Optionally, the address information may include a transport layer address (transport layer address). Alternatively, the address information may include a GPRS Tunneling Protocol (GTP) tunnel port identifier (TEID).

For example, the second information indicates a corresponding relationship between the network slice identifier and the address information, for example, the data may be a data packet, and the network slice identifier corresponding to the data packet may correspond to one address information. Or, the data may include a plurality of data packets, where the plurality of data packets respectively correspond to a plurality of different network slice identifiers, and then the plurality of different network slice identifiers may respectively correspond to different address information. Alternatively, the plurality of data packets may correspond to a network slice identifier, and the network slice identifier may correspond to address information.

Optionally, the DU may establish an uplink data plane tunnel through the second message.

S620, the terminal equipment sends data to the DU in the deactivation state.

Optionally, the terminal device may send the data to the DU through an RRC connection resume request message or an RRC resume request message in an inactive state.

S630, the DU determines the address information corresponding to the data. Specifically, the DU may determine the address information corresponding to the data according to the second information.

For example, the DU may determine a logical channel identifier, a DRB identifier, or a network slice identifier corresponding to the data, and determine uplink data transmission address information corresponding to the logical channel, the DRB, or the network slice according to a correspondence relationship between the logical channel identifier, the DRB identifier, or the network slice identifier and the second information. The uplink data transmission address information may be address information of an uplink data plane tunnel corresponding to the data.

Optionally, when the second information is used to indicate address information, the DU may send data to the CU in a data plane tunnel corresponding to the address information.

And S640, the DU sends the data in a data plane tunnel.

Alternatively, the DU may transmit the data and the address information.

In a possible implementation manner of the present application, the DU may add address information of an uplink data plane tunnel corresponding to the data packet. Correspondingly, the CU may receive the data, determine a logical channel identifier, a DRB identifier, or a network slice identifier corresponding to the data packet according to address information in the data packet, and process the data packet by using a protocol stack corresponding to the logical channel identifier, the DRB identifier, or the network slice identifier.

According to the communication method in the embodiment of the application, the central unit sends the second information to the distributed units through the UE context release command message, the distributed units determine the address information according to the corresponding relation in the second information, and send data to the central unit in the data plane tunnel corresponding to the address information, and the data does not need to be transmitted after being switched to a connection state, so that signaling overhead and transmission delay in the data transmission process can be reduced, and the efficiency of system data transmission is improved.

Fig. 7 shows a schematic flow chart of a communication method 700 of another embodiment of the present application. As shown in fig. 7, the communication method 700 includes:

s710, the DU sends an interface setup request (F1setup request) message to the CU.

S720, the CU sends second information to the DU.

Optionally, the CU sends the second information to the DU through an interface setup reply (F1setup response) message.

The second information may be used to indicate a correspondence between a logical channel identifier and address information, a correspondence between a DRB identifier and address information, or a correspondence between a network slice identifier and address information. Optionally, the second information may also be used to indicate a correspondence between another identifier and the address information. Alternatively, the second information may be used to indicate address information, which is not limited in this application.

Optionally, the CU may establish a tunnel through the second message.

Specifically, the DU may establish an uplink data plane tunnel through the second message.

S730, the terminal equipment sends data to the DU in the deactivated state.

S740, the DU determines the address information corresponding to the data. Specifically, the DU may determine the address information corresponding to the data according to the second information.

Optionally, when the second information is used to indicate address information, the DU may send data to a CU in a data plane tunnel corresponding to the address information.

S750, the DU sends the data in the data plane tunnel.

Alternatively, the DU may transmit the data and the address information.

The implementation of S730, S740, and S750 may refer to S620, S630, and S640 in fig. 6, and are not described herein again.

According to the communication method in the embodiment of the application, the central unit establishes a reply message through an interface to send the second information to the distributed units, the distributed units determine the address information according to the corresponding relation in the second information, and send data to the central unit in the data plane tunnel corresponding to the address information according to the address information, and data transmission is not needed after switching to a connection state, so that signaling overhead and transmission delay in the data transmission process can be reduced, and the efficiency of system data transmission is improved.

Fig. 8 shows a schematic flow chart of a communication method 800 according to another embodiment of the present application, and as shown in fig. 8, the communication method 800 includes:

s810, the terminal equipment sends data to DU in the deactivation state.

Alternatively, the terminal device may send data to the DU through an RRC connection resume request (RRC connection resume request) message in an inactive state, or the terminal device may send the data to the DU together with the RRC connection resume request message.

S820, the DU determines first information corresponding to the data, and the first information corresponds to the DRB.

Optionally, the first information may include at least one of: and the logical channel identifier corresponding to the data or the network slice identifier corresponding to the data.

The data may include a data packet corresponding to the logical channel identifier or the network slice identifier.

Optionally, the data includes a plurality of data packets, and the plurality of data packets may respectively correspond to different logical channel identifiers or different network slice identifiers. Alternatively, the plurality of data packets may correspond to one of the logical channel identifier or the network slice identifier.

Optionally, the DU may determine first information corresponding to the data in a MAC layer. For example, the first information may be a logical channel identifier, and in this case, the DU may correspond the data to the logical channel identifier.

For example, if the data is a data packet, the logical channel identifier corresponding to the data packet may correspond to a DRB identifier; or, if the data includes a plurality of data packets, where the plurality of data packets respectively correspond to a plurality of different logical channel identifiers, the plurality of different logical channel identifiers may respectively correspond to different DRB identifiers; or, if the plurality of data packets correspond to one logical channel identifier, the logical channel identifier may correspond to one DRB identifier.

S830, the DU sends the first information to the CU.

The DU may send the first information to the CU through an initial UL RRC message transfer (initial UL RRC message transfer) message.

Optionally, the CU may determine, according to the first information, a logical channel identifier corresponding to the data, so as to determine, according to a DRB identifier corresponding to the logical channel identifier, a bearer that needs to be established.

For example, the LCID list corresponding to the DRB to be established is as follows, and one possible form is:

list of LCIDs

>>LCID

S840, the CU sends third information to the DU, wherein the third information is used for indicating the DU to establish the DRB.

Optionally, the CU may further send, to the DU, third information through a UE context setup request (UE context setup request) message, where the third information is used to instruct the DU to setup the bearer associated with the first information.

Optionally, the bearer context modification request message may further carry indication information, where the indication information is used to indicate that the DU does not need to activate the context to enable the terminal device to enter the connection state, so that a recovery process of the DU to a protocol stack of the terminal device may be avoided, and system resources may be saved.

Alternatively, the indication information may indicate that the terminal device transmits a small data packet. At this time, since the terminal device transmits a small data packet, the DU does not need to activate a context to enable the terminal device to enter a connected state.

Alternatively, the CU only needs to request the DU to establish the data radio bearer corresponding to the first information in step S830.

For example, the CU may reserve the configurations of bearers DRB #1, DRB #2, DRB #3, and DRB #4 for the terminal device in the deactivated state, in step S830, the first information sent by the DU to the CU only corresponds to the bearers DRB #1 and DRB #2, that is, the current terminal only needs to send data corresponding to the DRB #1 and DRB #2, and then the CU may only request the DU to establish bearers corresponding to the DRB #1 and DRB #2 in this step, and does not need to establish the bearers corresponding to the DRB #3 and DRB #4 at the same time. Therefore, the number of the load establishing can be reduced, the time delay of the load establishing is reduced, and meanwhile, the invalid load establishing is avoided, so that the resource expense is saved.

S850, the DU sends a UE context setup reply (UE context setup response) message to the CU, and the UE context setup reply message is used for notifying the CU that the CU successfully establishes the bearer.

It should be understood that the DU may only establish the bearer corresponding to the data.

For example, the data may include a data packet, and the data packet corresponds to the logical channel identifier or the network slice identifier, in this case, the DU may only need to establish a bearer corresponding to the logical channel identifier, or the DU may only need to establish a bearer corresponding to the network slice identifier.

For another example, the data may include a plurality of data packets, and the plurality of data packets may respectively correspond to different logical channel identifiers or different network slice identifiers, in this case, the DU may only establish a bearer corresponding to the logical channel identifier corresponding to the plurality of data packets, or the DU may only establish a bearer corresponding to the network slice identifier.

For another example, the data may include a plurality of data packets, and the plurality of data packets may correspond to one of the logical channel identifier or the network slice identifier, and at this time, the DU may only establish a bearer corresponding to the logical channel identifier, or the DU may only establish a bearer corresponding to the network slice identifier.

For example, the first information in step S830 may include LCID #1, LCID #2, and LCID #3, where LCID #1 corresponds to bearer DRB #1, LCID #2 corresponds to bearer DRB #2, and LCID #3 corresponds to bearer DRB #3, and the DU may only successfully establish DRB #1 and DRB #2 due to limited resource of the DU. Of course, the DU may also establish all bearers DRB #1, DRB #2 and DRB # 3.

S860, the DU sends uplink data to the CU.

It can be understood that the DU can only send data corresponding to a successfully established bearer. For example, the terminal device sends LCID #1, LCID #2 and LCID #3 data to the DU, where LCID #1 corresponds to DRB #1, LCID #2 corresponds to DRB #2, and LCID #3 corresponds to DRB #3, and if the DU can only successfully establish DRB #1 and DRB #2, in this step, the DU can only send data corresponding to DRB #1 and data corresponding to DRB #2 to the CU.

S870, the CU sends a downlink RRC message transfer (DL RRC message transfer) message to the DU.

The downlink RRC message transmission message may include an RRC release (RRC release) message.

Optionally, the DU may send an RRC release message to the terminal device.

Optionally, the RRC release message may include a suspend configuration message, and at this time, the terminal device is in an inactive state after receiving the RRC release message; otherwise, the terminal equipment is switched to an idle state.

Fig. 9 shows a schematic flow chart of a communication method 900 according to another embodiment of the present application, and as shown in fig. 9, the communication method 900 includes:

s910, the CU-CP sends a bearer context modification request (bearer context modification request) message to the CU-UP.

S920, the CU-UP sends second information to the CU-CP.

Wherein the second information may be used to indicate a correspondence between the data radio bearer identifier and the address information, or a correspondence between the logical channel identifier and the address information, or a correspondence between the network slice identifier and the address information.

Optionally, the CU-UP sends the second information to the CU-CP through a bearer context modification reply (bearer context modification response) message.

S930, the CU-CP sending the second information to the DU.

Wherein the second information may be used to indicate at least one of: the correspondence between the data radio bearer identifier and the address information, the correspondence between the logical channel identifier and the address information, or the correspondence between the network slice identifier and the address information.

Alternatively, the CU-CP may establish a common data plane tunnel in a UE context release command (UE context release command) message.

For example, the CU-CP sends the second information to the DU via a UE context release order message.

S940, the DU sends RRC connection release information to the terminal equipment.

Optionally, the RRC release message may include a suspend configuration message, and at this time, the terminal device is in an inactive state after receiving the RRC connection release message; otherwise, the terminal equipment is switched to an idle state.

S950, the terminal device sends data to the DU in the deactivated state.

Optionally, the terminal device may send the data to the DU through an RRC connection resume request (RRC connection resume request) message in an inactive state.

S960, the DU determines first information corresponding to the data, and the first information corresponds to the DRB.

Optionally, the DU may determine the first information according to the second information, where the first information is associated with the bearer.

For example, the DU may determine the address information according to the correspondence in the second information. Wherein the correspondence includes at least one of a correspondence between the data radio bearer identifier and the address information, a correspondence between the logical channel identifier and the address information, or a correspondence between the network slice identifier and the address information.

S970, the DU sends the data to the CU-CP in a data plane tunnel.

Wherein the data plane tunnel may be the data plane tunnel established in S930.

Alternatively, the DU may transmit the first information and the data to the CU-CP.

Alternatively, the DU may transmit the address information and the data determined in S960 to the CU-CP.

According to the communication method in the embodiment of the present application, the CU-CP sends the second information to the DU, the distributed unit determines the address information according to the correspondence in the second information, and sends data to the central unit in the data plane tunnel corresponding to the address information according to the address information, without switching to a connection state and then transmitting the data, so that signaling overhead and transmission delay in a data transmission process can be reduced, and efficiency of system data transmission is improved.

Fig. 10 shows a schematic flow chart of a communication method 1000 according to an embodiment of the present application, and as shown in fig. 10, the communication method 1000 includes:

s1010, the terminal device sends data to the DU in the deactivated state.

Optionally, the terminal device may send data to the DU through an RRC connection resume request (RRC connection resume request) message in an inactive state.

S1020, the DU determines first information corresponding to the data, and the first information corresponds to the DRB.

Optionally, the first information may include at least one of: a logical channel identifier, address information, or a network slice identifier corresponding to the data, wherein the address information includes at least one of: uplink data transmission address information corresponding to the data radio bearer identifier, uplink data transmission address information corresponding to the logical channel identifier, or uplink data transmission address information corresponding to the network slice identifier.

Optionally, the DU may determine first information corresponding to the data in the MAC layer, for example, the first information may be a logical channel identifier.

S1030, the DU may send first information to the CU-CP.

In this embodiment, the DU may send the first information to the CU-CP through an initial UL RRC message transfer (initial UL RRC message transfer) message.

Alternatively, the DU may transmit the data to the CU-CP before transmitting the first information to the CU-CP. Alternatively, the DU may transmit the data to the CU-CP after transmitting the first information to the CU-CP.

S1040, the CU-CP determines the load bearing corresponding to the data according to the first information.

S1050, the CU-CP sends first information to the CU-UP, and the first information corresponds to the DRB.

In a possible implementation manner of the embodiment of the present application, the first information may be a logical channel identifier, a DRB identifier, or a network slice identifier corresponding to the data.

For example, the data may include a data packet, where the data packet corresponds to a bearer, and in this case, the first information may be a logical channel identifier, a DRB identifier, or a network slice identifier corresponding to the data packet.

For another example, the data may include a plurality of data packets, and the plurality of data packets may respectively correspond to different bearers, and in this case, the first information may include a logical channel identifier, a DRB identifier, or a network slice identifier corresponding to each of the plurality of data packets.

For another example, the data may include a plurality of data packets, and the plurality of data packets may correspond to one bearer, and in this case, the first information may be a logical channel identifier, a DRB identifier, or a network slice identifier, which correspond to the plurality of data packets together.

Optionally, the CU-CP may send the first information through a bearer context modification request (bearer context modification request) message. Accordingly, the CU-UP receives the first information through a bearer context modification request message.

Optionally, the bearer context modification request message may further carry indication information, where the indication information is used to indicate that the CU-CP does not need to activate a context to enable the terminal device to enter a connected state, so that a recovery process of a protocol stack of the terminal device by a CU-UP may be avoided, and system resources may be saved.

Optionally, the CU-UP may determine a bearer corresponding to the data according to the first information, and process the data according to the PDCP and the SDAP corresponding to the bearer.

Alternatively, the CU-CP may send the data and the first information to the CU-UP.

For example, the data corresponds to the first information

Data List (Data List)

> > the first information (logical channel identification, DRB identification, or network slice identification)

> > the Data (Data)

Optionally, the first information may include the data and a corresponding logical channel identifier, DRB identifier, or network slice identifier, and the CU-UP may correspond the data packet to a corresponding DRB through the logical channel identifier, the DRB identifier, or the network slice identifier, and then process the data packet by using a PDCP layer protocol stack and an SDAP layer protocol stack corresponding to the DRB.

In another possible implementation manner of this embodiment of the present application, the first information may be address information, such as a data identifier, allocated by the CU-UP for a bearer corresponding to the first information. In this implementation, the CU-CP may add the address information to a header of data, and the CU-UP may determine, according to the address information, bearer information corresponding to the data, and then process the data packet by using a PDCP layer protocol stack and an SDAP layer protocol stack corresponding to the DRB.

S1060, the CU-UP sends a bearer context modification reply (bearer context modification response) message to the CU-CP.

S1070, the CU-CP sends RRC message to the DU.

And S1080, the DU sends the RRC message to the terminal equipment.

According to the communication method in the embodiment of the application, the CU-CP sends the first information to the CU-UP, and the CU-UP may determine the data radio bearer corresponding to the data according to the first information and process the data according to the protocol stack corresponding to the data radio bearer, so that the terminal device may transmit the data without switching from the inactive state to the connected state, thereby reducing signaling overhead of the terminal device in the inactive state during data transmission, reducing delay of data transmission, and improving efficiency of system data transmission.

Fig. 11 is a schematic block diagram of a communication apparatus 1100 according to an embodiment of the present application. It should be understood that the communication device 1100 is merely an example. The communication apparatus of the embodiment of the present application may further include other modules or units, or include modules having functions similar to those of the respective modules in fig. 11, or not include all the modules in fig. 11.

In an embodiment of the present application, the receiving module 1110 is configured to receive data sent by a terminal device in a deactivated state, where the data corresponds to a data radio bearer;

a processing module 1120, configured to determine first information corresponding to the data, where the first information is associated with the bearer;

a sending module 1130, configured to send the first information to the central unit.

Optionally, the first information comprises at least one of: a logical channel identifier, address information, or a network slice identifier corresponding to the data, wherein the address information includes at least one of: uplink data transmission address information corresponding to a data radio bearer identifier, uplink data transmission address information corresponding to the logical channel identifier, or uplink data transmission address information corresponding to the network slice identifier.

Optionally, the sending module 1130 is specifically configured to: and sending the first information to the central unit through an initial uplink radio resource control message transmission message.

Optionally, the receiving module 1110 is further configured to: receiving second information sent by the central unit, wherein the second information is used for indicating at least one of the following items: the corresponding relation between the data radio bearer identification and the address information, the corresponding relation between the logical channel identification and the address information, or the corresponding relation between the network slice identification and the address information.

Optionally, the processing module 1120 is specifically configured to: and determining the address information according to the corresponding relation.

Optionally, the receiving module 1110 is specifically configured to: and receiving the second information sent by the central unit through an interface establishment reply message or a context release command message.

Optionally, the sending module 1130 is specifically configured to: sending the first information and the data to the central unit.

Optionally, the receiving module 1110 is further configured to: and receiving third information sent by the central unit through a context establishment request message, wherein the third information is used for indicating the distributed unit to establish the data radio bearer.

Fig. 12 is a schematic block diagram of a communication apparatus 1200 according to an embodiment of the present application. It should be understood that communications apparatus 1200 is merely an example. The communication apparatus of the embodiment of the present application may further include other modules or units, or include modules having functions similar to those of the respective modules in fig. 12, or not include all the modules in fig. 12.

In an embodiment of the present application, the receiving module 1210 is configured to receive first information sent by a distributed unit;

the processing module 1220 is configured to determine, according to the first information, a data radio bearer corresponding to the first information;

the receiving module 1210 is configured to receive data sent by the terminal device in the deactivated state from the distributed unit.

Optionally, the first information comprises at least one of: the logical channel identifier corresponding to the data, the address information, and the network slice identifier corresponding to the data, wherein the address information includes at least one of: uplink data transmission address information corresponding to a data radio bearer identifier, uplink data transmission address information corresponding to the logical channel identifier, or uplink data transmission address information corresponding to the network slice identifier.

Optionally, the receiving module 1210 is specifically configured to: and receiving the first information sent by the distributed unit through an initial uplink radio resource control message transmission message.

Optionally, the communication apparatus further includes a sending module 1230 configured to: sending second information to the distributed unit, the second information indicating at least one of: the corresponding relation between the data radio bearer identification and the address information, or the corresponding relation between the logical channel identification and the address information, or the corresponding relation between the network slice identification and the address information.

Optionally, the sending module 1230 is specifically configured to: and sending the second information to the distributed unit through an interface establishment reply message or a context release command message.

Optionally, the receiving module 1210 is specifically configured to: and receiving the first information and the data sent by the distributed unit.

Optionally, the sending module 1230 is further configured to: and sending third information to the distributed unit through a context establishment request message, wherein the third information is used for indicating the distributed unit to establish the data radio bearer.

Optionally, the communication device 1200 includes a CU-UP and a CU-CP.

Optionally, the sending module 1230 belongs to the CU-UP, and the sending module 1230 is further configured to: the CU-UP sends the second information to the CU-CP.

Optionally, the sending module 1230 belongs to the CU-CP, and the sending module 1230 is further configured to: the CU-CP sending the first information to the CU-UP.

Fig. 13 is a schematic structural diagram of a communication apparatus 1300 according to an embodiment of the present application. It should be understood that the communication apparatus 1300 shown in fig. 13 is only an example, and the communication apparatus 1300 of the embodiment of the present application may further include other modules or units, or include modules having functions similar to those of the respective modules in fig. 13.

The communications device 1300 may include one or more processors 1310, one or more memories 1320, a receiver 1330, and a transmitter 1340. The receiver 1330 and the transmitter 1340 may be integrated together, referred to as a transceiver. The memory 1320 is used to store program codes executed by the processor 1310. The memory 1320 may be integrated into the processor 1310, or the processor 1310 may be coupled to one or more memories 1320 for retrieving instructions from the memory 1320.

In one embodiment, the processor 1310 may be configured to implement the operations or steps that the processing module 1120 in fig. 11 can implement, the receiver 1330 may be configured to implement the operations or steps that the receiving module 1110 in fig. 11 can implement, and the transmitter 1340 may be configured to implement the operations or steps that the transmitting module 1130 in fig. 11 can implement.

In another embodiment, the processor 1310 may be configured to implement the operations or steps that the processing module 1220 of fig. 12 can implement, the receiver 1330 may be configured to implement the operations or steps that the receiving module 1210 of fig. 12 can implement, and the transmitter 1340 may be configured to implement the operations or steps that the transmitting module 1230 of fig. 12 can implement.

It should be understood that the processor in the embodiments of the present application may be a Central Processing Unit (CPU), and the processor may also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It will also be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example, but not limitation, many forms of Random Access Memory (RAM) are available, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), Enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM), and direct bus RAM (DR RAM).

The above embodiments may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer instructions or computer programs. The procedures or functions according to the embodiments of the present application are wholly or partially generated when the computer instructions or the computer program are loaded or executed on a computer. 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 on 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 by wire (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, such as a server, data center, etc., that contains one or more collections of available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. The semiconductor medium may be a solid state disk.

It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. 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 present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

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 ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of 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 through some interfaces, devices or units, and may be in an electrical, mechanical 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 network units. 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 unit may exist alone physically, or two or more units are integrated into one unit.

The functions may be stored in a computer-readable storage medium if they are implemented in the form of software functional units and sold or used as separate products. Based on such understanding, the technical solutions of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall 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

1. A method of communication, comprising:

the distributed unit receives data sent by the terminal equipment in a deactivated state;

the distributed unit determines first information corresponding to the data, wherein the first information corresponds to a data radio bearer;

the first information includes at least one of: a logical channel identifier, address information, or a network slice identifier corresponding to the data, wherein the address information includes at least one of: uplink data transmission address information corresponding to a data radio bearer identifier, uplink data transmission address information corresponding to the logical channel identifier, or uplink data transmission address information corresponding to the network slice identifier;

and the distributed unit sends the first information to a central unit through a control plane channel, wherein the first information is used for the central unit to determine a data radio bearer corresponding to the first information.

2. The communication method according to claim 1, wherein the distributed unit sends the first information to the central unit through a control plane channel, comprising:

and the distributed unit sends the first information to the central unit through an initial uplink radio resource control message transmission message.

3. The communication method according to claim 1, further comprising:

the distributed unit receives second information sent by the central unit, wherein the second information is used for indicating at least one of the following items: the corresponding relation between the data radio bearer identification and the address information, the corresponding relation between the logical channel identification and the address information, or the corresponding relation between the network slice identification and the address information.

4. The communication method according to claim 3, wherein the determining, by the distributed unit, first information corresponding to the data comprises:

and the distributed unit determines the address information according to the corresponding relation.

5. The communication method according to claim 3 or 4, wherein the distributed unit receives the second information transmitted by the central unit, and comprises:

and the distributed unit receives the second information sent by the central unit through an interface establishment reply message or a context release command message.

6. The communication method according to any one of claims 1 to 4, wherein the sending of the first information by the distributed unit to the central unit comprises:

the distributed unit sends the first information and the data to the central unit.

7. The communication method according to claim 1 or 2, characterized in that the communication method further comprises:

and the distributed unit receives third information sent by the central unit through a context establishment request message, wherein the third information is used for indicating the distributed unit to establish the data radio bearer.

8. A method of communication, comprising:

the central unit receives first information sent by the distributed units through a control plane channel;

the first information includes at least one of: the method comprises the steps of a logic channel identifier corresponding to data, address information and a network slice identifier corresponding to the data, wherein the address information comprises at least one of the following items: uplink data transmission address information corresponding to a data radio bearer identifier, uplink data transmission address information corresponding to the logical channel identifier, or uplink data transmission address information corresponding to the network slice identifier;

the central unit determines a data radio bearer corresponding to the first information according to the first information;

and the central unit receives data sent by the terminal equipment in the deactivated state from the distributed units.

9. The communication method according to claim 8, wherein the central unit receives the first information sent by the distributed units through a control plane channel, and comprises:

and the central unit receives the first information sent by the distributed unit through an initial uplink radio resource control message transmission message.

10. The communication method according to claim 8, further comprising:

the central unit sends second information to the distributed units, wherein the second information is used for indicating at least one of the following items: the corresponding relation between the data radio bearer identification and the address information, or the corresponding relation between the logical channel identification and the address information, or the corresponding relation between the network slice identification and the address information.

11. The communication method according to claim 10, wherein the central unit sends second information to the distributed units, comprising:

and the central unit sends the second information to the distributed unit through an interface establishment reply message or a context release command message.

12. The communication method according to any one of claims 8 to 11, wherein the central unit receives the first information transmitted by the distributed unit, and comprises:

and the central unit receives the first information and the data sent by the distributed unit.

13. The communication method according to claim 8 or 9, characterized in that the communication method further comprises:

and the central unit sends third information to the distributed units through context establishment request messages, wherein the third information is used for indicating the distributed units to establish the data radio bearers.

14. The communication method according to claim 10 or 11, wherein the central unit includes CU-UP and CU-CP.

15. The communication method according to claim 14, further comprising:

the CU-UP sends second information to the CU-CP.

16. The communication method according to claim 14, further comprising:

the CU-CP sending the first information to the CU-UP.

17. A communications apparatus, comprising:

the receiving module is used for receiving data sent by the terminal equipment in a deactivated state;

the processing module is used for determining first information corresponding to the data, and the first information corresponds to a data radio bearer;

a sending module, configured to send the first information to a central unit through a control plane channel, where the first information is used for the central unit to determine a data radio bearer corresponding to the first information.

18. The communications apparatus of claim 17, wherein the sending module is specifically configured to:

and sending the first information to the central unit through an initial uplink radio resource control message transmission message.

19. The communications apparatus of claim 17, wherein the receiving module is further configured to:

receiving second information sent by the central unit, wherein the second information is used for indicating at least one of the following items: the corresponding relation between the data radio bearer identification and the address information, the corresponding relation between the logical channel identification and the address information, or the corresponding relation between the network slice identification and the address information.

20. The communications apparatus according to claim 19, wherein the processing module is specifically configured to:

and determining the address information according to the corresponding relation.

21. The communication apparatus according to claim 19 or 20, wherein the receiving module is specifically configured to:

and receiving the second information sent by the central unit through an interface establishment reply message or a context release command message.

22. The communications device according to any one of claims 17 to 20, wherein the sending module is specifically configured to:

sending the first information and the data to the central unit.

23. The communications apparatus according to claim 17 or 18, wherein the receiving module is further configured to:

and receiving third information sent by the central unit through a context establishment request message, wherein the third information is used for indicating the distributed units to establish the data radio bearer.

24. A communications apparatus, comprising:

the receiving module is used for receiving first information sent by the distributed unit through a control plane channel;

the first information includes at least one of: the method comprises the steps of identifying a logical channel corresponding to data, address information and a network slice corresponding to the data, wherein the address information comprises at least one of the following items: uplink data transmission address information corresponding to a data radio bearer identifier, uplink data transmission address information corresponding to the logical channel identifier, or uplink data transmission address information corresponding to the network slice identifier;

the processing module is used for determining a data radio bearer corresponding to the first information according to the first information;

the receiving module is configured to receive data sent by the terminal device in the deactivated state from the distributed unit.

25. The communications apparatus of claim 24, wherein the receiving module is specifically configured to:

and receiving the first information sent by the distributed unit through an initial uplink radio resource control message transmission message.

26. The communications apparatus of claim 24, wherein the communications apparatus further comprises a sending module configured to:

sending second information to the distributed unit, the second information indicating at least one of: the corresponding relation between the data radio bearer identification and the address information, or the corresponding relation between the logical channel identification and the address information, or the corresponding relation between the network slice identification and the address information.

27. The communications apparatus of claim 26, wherein the sending module is specifically configured to:

and sending the second information to the distributed unit through an interface establishment reply message or a context release command message.

28. The communication apparatus according to any one of claims 24 to 27, wherein the receiving module is specifically configured to:

and receiving the first information and the data sent by the distributed unit.

29. The communications apparatus of claim 26, wherein the means for transmitting is further configured to:

and sending third information to the distributed unit through a context establishment request message, wherein the third information is used for indicating the distributed unit to establish the data radio bearer.

30. The communication device according to claim 26 or 27, wherein the communication device comprises a CU-UP and a CU-CP.

31. The communications apparatus of claim 30, wherein the sending module belongs to the CU-UP, and wherein the sending module is further configured to:

the CU-UP sends second information to the CU-CP.

32. The communications apparatus of claim 30, wherein the sending module belongs to the CU-CP, and wherein the sending module is further configured to:

the CU-CP sending the first information to the CU-UP.

33. A computer-readable storage medium, in which a program code for a communication apparatus to execute is stored, the program code comprising instructions for executing the communication method according to any one of claims 1 to 16.