CN116326027A

CN116326027A - Communication method and communication device

Info

Publication number: CN116326027A
Application number: CN202080105564.5A
Authority: CN
Inventors: 彭文杰; 王君
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-09-29
Filing date: 2020-09-29
Publication date: 2023-06-23
Also published as: WO2022067512A1

Abstract

The embodiment of the application provides a communication method and device. The method comprises the following steps: the first communication device sends the corresponding relation between the side link configuration information and the side link logic channel information to the network device; the first communication device receives wireless link configuration information from the network device; the first communication device performs first communication with the second communication device based on the wireless link configuration information, so that flexible configuration of network communication is improved.

Description

Communication method and communication device

Technical Field

The present invention relates to the field of wireless communications technologies, and in particular, to a communication method and a communication device.

Background

With the development of wireless communication technology, future-oriented communication systems, such as the fifth generation mobile communication (the 5th Generation mobile communication,5G) system or New Radio (NR) systems, are derived. In the above communication system, the terminals can communicate directly through a sidelink (sidelink). One typical application scenario for sidelink communication is the vehicle to X (V2X). In the Internet of vehicles, each vehicle can be understood as a terminal, and data transmission can be directly carried out between the terminals through a sidelink, so that communication time delay is effectively reduced.

In the prior art, communication is performed based on a wireless link when a side link connection cannot be realized between terminals.

Disclosure of Invention

The application describes a communication method and a communication device for realizing data transmission between terminals.

In a first aspect, a communication method is provided, the method comprising: the first communication device sends the corresponding relation between the side link configuration information and the side link logic channel information to the network device; the first communication device receives wireless link configuration information from the network device; the first communication device performs first communication with a second communication device based on the radio link configuration information. Based on the communication mode, flexible configuration of communication between terminals can be realized, and the possibility of system adaptation is improved.

In one possible implementation, the first communication device receives the sidelink configuration information from the network device; the first communication device performs second communication with the second communication device based on the side link configuration information. Thus, the communication device can acquire the sidelink configuration information for SL communication between terminals.

In one possible implementation, the first communication device sends indication information to the network device for indicating that the communication with the second communication device is based on at least one of the following: data splitting on the side link and the wireless link; data replication on the sidelink and the wireless link; communication is entirely via the wireless link. Therefore, the communication device can autonomously determine one of a plurality of communication modes, and design complexity of the network device is reduced.

In one possible implementation, the first communication device sends indication information to the network device, where the indication information is used to indicate that a communication type between the first communication device and the second communication device is unicast, multicast or broadcast. Therefore, the communication device can autonomously determine one of a plurality of communication types, and design complexity of the network device is reduced.

In one possible implementation, the first communication device sends an identification of the second communication device to the network device. In general, the identifier of the second communication device may also be sent to the network device together with the indication information, so as to implement flexible communication in combination with a communication type or a communication manner.

In one possible implementation, the first communication device receives a first message from the network device requesting the logical channel information.

In one possible implementation, the first message includes at least one of: the sidelink configuration information; and the indication information is used for indicating that the communication type of the first communication equipment and the second communication equipment is unicast or multicast.

In one possible implementation, the radio link configuration information includes radio link bearer configuration information and the side link logical channel information.

In one possible implementation, the communication device is a terminal, and the network device is a base station; or, the network equipment device is a centralized unit CU.

In a second aspect, a communication method is provided, including: the network device receives the corresponding relation between the side link configuration information and the side link logic channel information from the first communication device; the network device sends wireless link configuration information to the first communication device and the second communication device, respectively, for a first communication between the first communication device and the second communication device.

In one possible implementation, the network device sends the sidelink configuration information to the first communication device for a second communication between the first communication device and the second communication device.

In one possible implementation, the method further includes: the network device receives first indication information from the first communication device, and the first indication information is used for indicating communication between the first communication device and the second communication device based on at least one of the following modes: data splitting on the side link and the wireless link; data replication on the sidelink and the wireless link; communication is entirely via the wireless link.

In one possible implementation, the method further includes: the network device receives an identification of the second communication device from the first communication device.

In one possible implementation, the method further includes: the first communication device sends indication information to the network device, and the indication information is used for indicating that the communication type of the first communication device and the second communication device is unicast or multicast.

In one possible implementation, the method further includes: the network device sends a first message to the first communication device requesting the logical channel information.

In one possible implementation, the method further includes: the network device receives second indication information from the second communication device, for indicating the network device to provide the sidelink configuration information and the radio link configuration information.

In one possible implementation, the second indication information includes at least one of: the indication information is used for indicating that the communication type between the first communication equipment and the second communication equipment is unicast or multicast; the sidelink configuration information; an identification of the first communication device.

In one possible implementation, the second indication information is further used to indicate that the communication between the first communication device and the second communication device is based on at least one of the following: data splitting on the side link and the wireless link; data replication on the sidelink and the wireless link; communication is entirely via the wireless link.

In one possible implementation, the method further includes: the network device sends the target identifier and the source identifier corresponding to the data to the second communication device by the first communication device.

In a third aspect, a communication method is provided, including: the second communication device sends indication information to the network device, and the indication information is used for indicating the network device to provide dual-interface configuration; the second communication device receives wireless link configuration information from the network device; the second communication device performs a first communication with the first communication device based on the radio link configuration information.

In one possible implementation, the indication information includes at least one of: the quality of service of the sidelink; the side link logical channel information; the indication information is used for indicating that the communication type of the first communication equipment and the second communication equipment is unicast or multicast; an identification of the first communication device; indicating communication with the second communication device is based on at least one of: data splitting on the side link and the wireless link; data replication on the sidelink and the wireless link; or communicate entirely via the wireless link.

In a fourth aspect, there is provided an apparatus for sidelink communication, the apparatus being operable to perform the operations of the communication device of the first aspect, the third aspect and any possible implementation thereof. In particular, the apparatus may comprise a module unit for performing the respective operations of the communication device in any possible implementation manner of the first aspect, the third aspect described above.

In a fifth aspect, there is provided an apparatus for sidelink communication, the apparatus being operable to perform the operations of the network device of the second aspect and any possible implementation thereof. In particular, the apparatus may comprise a module unit for performing the respective operations of the network device in any possible implementation manner of the second aspect described above.

In a sixth aspect, there is provided a terminal device comprising: a processor, a transceiver, and a memory. Wherein the processor, the transceiver and the memory communicate with each other through an internal connection path. The memory is used for storing instructions, and the processor is used for executing the instructions stored by the memory. When the processor executes the instructions stored by the memory, the execution causes the terminal device to perform any one of the methods of any possible implementation manner of the first aspect, the third aspect, or the execution causes the terminal device to implement the apparatus provided in the fourth aspect.

In a seventh aspect, there is provided a network device comprising: a processor, a transceiver, and a memory. Wherein the processor, the transceiver and the memory communicate with each other through an internal connection path. The memory is used for storing instructions, and the processor is used for executing the instructions stored by the memory. When the processor executes the instructions stored by the memory, the execution causes the network device to perform any one of the methods of any possible implementation manner of the second aspect, or the execution causes the network device to implement the apparatus provided by the fifth aspect.

In an eighth aspect, a chip system is provided, comprising a memory for storing a computer program and a processor for calling and running the computer program from the memory, such that a communication device in which the chip system is installed performs any of the methods of the first to third aspects and possible implementations thereof.

In a ninth aspect, there is provided a computer program product comprising: computer program code which, when run by a communication unit, processing unit or transceiver, processor of a communication device (e.g. a network device or a terminal device), causes the communication device to perform the method of any of the above first to third aspects and possible implementations thereof.

In a tenth aspect, a computer readable storage medium is provided, the computer readable storage medium storing a program, the program causing a device (e.g. a network device or a communication device) to perform any of the methods of the first to third aspects and possible implementations thereof.

In an eleventh aspect, there is provided a computer program which, when executed on a computer, causes the computer to carry out any of the methods of the first to third aspects and possible implementations thereof.

Drawings

Fig. 1a is a schematic diagram of a communication system according to an embodiment of the present application;

fig. 1b is a schematic diagram of a communication system according to an embodiment of the present application;

fig. 1c is a schematic diagram of a communication system according to an embodiment of the present application;

fig. 2a is a schematic diagram of a communication system according to an embodiment of the present application;

fig. 2b is a schematic diagram of a communication system according to an embodiment of the present application;

fig. 2c is a schematic diagram of a protocol stack according to an embodiment of the present application;

FIGS. 3-3e are flow diagrams of various communication methods according to embodiments of the present application;

fig. 4 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a communication device according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

In order to solve the problem that data transmission between a terminal and an intermediate terminal cannot be performed aiming at different communication systems in the prior art, an embodiment of the present invention proposes a technical scheme based on the communication system described in fig. 1a, which is used for improving the effectiveness of data transmission in a system.

Fig. 1a is a schematic diagram of one possible system architecture to which the embodiments of the present application are applicable. The system architecture as shown in fig. 1a comprises a second device 101 and a first device 102. The second device in the embodiment of the present application may be connected to the first device in a wireless manner, that is, the second device may communicate with the first device through a wireless network. It should be understood that fig. 1a is only a schematic architecture diagram of a communication system, and the number of first devices and the number of second devices in the communication system are not limited in this embodiment of the present application. In this embodiment, wireless means may be understood as side link communication and/or wireless link communication.

In one example, the first device and the second device in the system architecture described above may be in sidelink communication. Referring to fig. 1b, a schematic diagram of a side link communication scenario is shown in fig. 1b, where a network device 105 and one or more terminal devices (e.g., terminal device 1061, terminal device 1062) may be included in the communication scenario. The network device 105 and the terminal device 1061, the terminal device 1062 may perform data transmission through air interface resources, and the terminal device 1061 and the terminal device 1062 may perform data transmission through side link resources. Wherein the first device may be a terminal device 1061 and the second device may be a terminal device 1062, or vice versa. In fig. 1b, taking uplink transmission as an example, a data channel for uplink data transmission by the network device 105 and the terminal device (terminal device 1061 or terminal device 1062) may be carried in an Uplink (UL) carrier (such as a first UL carrier). The data channels for data transmission by terminal device 1061 and terminal device 1062 may be carried in SL carriers. In one example, the SL carrier may be a UL carrier (such as a second UL carrier), and the first UL carrier and the second UL carrier may be the same carrier.

Side Link (SL) communication refers to a technology that allows mutual communication between terminal devices, and resources used for carrying terminal device communication may be referred to as side link resources. The side link communication can realize direct communication among different terminal devices, so that higher data rate, lower time delay and lower power consumption can be realized. The side link communications may include, for example, vehicle-to-vehicle (vehicle-to-vehicle), vehicle-to-infrastructure (vehicle-to-infrastructure), vehicle-to-user (vehicle-to-infrastructure). It will be appreciated that the sidelink communication technique may be used in both industrial internet communication scenarios and wireless mesh network communication scenarios.

As shown in fig. 1c, the communication system includes at least a Centralized Unit (CU) 10c and a Distributed Unit (DU) 11c. The DU11c communicates with the terminal 12 c. For example, part of the functions of the NR base station are deployed at the CU, and the remaining functions are deployed at the DU. At this time, the number of DUs may be one or more, and a plurality of DUs may share one CU, so as to save cost and facilitate network expansion. In particular, the splitting of CUs and DUs may be in terms of a protocol stack split, with one possible way being to deploy at least one of the following protocol layers at the CU: a radio resource control (Radio Resource Control, RRC) layer, a service data adaptation protocol (service data adaptation protocol, SDAP) layer, a packet data convergence protocol (Packet Data Convergence Protocol, PDCP) layer. At least one of the remaining protocol layers is deployed at the DU: a radio link control (Radio Link Control, RLC), medium access control (Media Access Control, MAC) or physical layer. The CU and DU can be connected through an F1 interface. CU stands for NR base station and NR core network connection. Those skilled in the art will appreciate that the CU and DU described above may be located in different physical entities or independent of the NR base station. In other words, CU and DU are combined, and the function of the NR base station can be implemented or the NR base station can be replaced.

In the above network architecture, the signaling generated by the CU may be transmitted to the terminal device through the DU, or the signaling generated by the terminal device may be transmitted to the CU through the DU. The DU may be directly transmitted to the terminal device or CU after being encapsulated by the protocol layer without parsing the signaling. In the following embodiments, transmission or reception of signaling by a DU includes such a scenario if such signaling is involved in the transmission between the DU and the terminal device. For example, the signaling of the RRC or PDCP layer is eventually processed as the signaling of the PHY layer to be transmitted to the terminal device, or is converted from the received signaling of the PHY layer. Under this architecture, the signaling of the RRC or PDCP layer may be considered as being sent by either a DU or by both a DU and a radio frequency device.

The system architecture and the service scenario described in the embodiments of the present invention are for more clearly describing the technical solution provided in the embodiments of the present invention, and do not constitute a limitation on the technical solution provided in the embodiments of the present invention, and those skilled in the art can know that, with the evolution of the network architecture and the appearance of a new service scenario, the technical solution provided in the embodiments of the present invention is equally applicable to similar technical problems.

The technical solution of the embodiment of the application can be applied to various communication systems, for example: global system for mobile communications (global system of mobile communication, GSM), code division multiple access (code division multiple access, CDMA) system, wideband code division multiple access (wideband code division multiple access, WCDMA) system, general packet radio service (general packet radio service, GPRS), long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD), universal mobile telecommunications system (universal mobile telecommunication system, UMTS), worldwide interoperability for microwave access (worldwide interoperability for microwave access, wiMAX) communication system, future fifth generation (5th generation,5G) system, or New Radio (NR), etc. The technical solutions of the embodiments of the present application may also be applied to device-to-device (D2D) communication, machine-to-machine (machine to machine, M2M) communication, machine type communication (machine type communication, MTC), and communication in a vehicle network system. The communication modes in the vehicle network system are collectively called V2X (X represents anything), and for example, the V2X communication includes: vehicle-to-vehicle (vehicle to vehicle, V2V), vehicle-to-roadside infrastructure (vehicle to infrastructure, V2I), vehicle-to-pedestrian communication (vehicle to pedestrian, V2P), or vehicle-to-network (vehicle to network, V2N), etc.

It should be understood that the network device in the above communication system may be any device having a wireless transceiver function or a chip that may be disposed on the device, where the device includes, but is not limited to: an evolved Node B (eNB), a radio network controller (radio network controller, RNC), a Node B (Node B, NB), a base station controller (base station controller, BSC), a base transceiver station (base transceiver station, BTS), a home base station (e.g., home evolved NodeB, or a home Node B, HNB), a donor base station (donor eNB), a Base Band Unit (BBU), an Access Point (AP), a radio relay Node, a radio backhaul Node, a transmission point (transmission point, TP), or a transmission reception point (transmission and reception point, TRP) in a wireless fidelity (wireless fidelity, WIFI) system, or the like, may also be 5G, e.g., an NR, a gNB in a system, or a transmission point (TRP or TP), one or a group of base stations (including a plurality of antenna panels) in a 5G system, or may also be a network Node, e.g., a Unit (BBU), or a distributed Unit (BBU), or the like, constituting a gcb or transmission point.

In some deployments, the gNB may include a Centralized Unit (CU) and DUs. The gNB may also include a Radio Unit (RU). The CU implements part of the functions of the gNB, the DU implements part of the functions of the gNB, for example, the CU implements the functions of a radio resource control (radio resource control, RRC), a packet data convergence layer protocol (packet data convergence protocol, PDCP) layer, and the DU implements the functions of a radio link control (radio link control, RLC), a medium access control (media access control, MAC), and a Physical (PHY) layer. Since the information of the RRC layer may be eventually changed into the information of the PHY layer or converted from the information of the PHY layer, under this architecture, higher layer signaling, such as RRC layer signaling or PHCP layer signaling, may also be considered as being transmitted by the DU or by the du+ru. It is understood that the network device may be a CU node, or a DU node, or a device comprising a CU node and a DU node. In addition, the CU may be divided into network devices in the access network RAN, or may be divided into network devices in the core network CN, which is not limited herein.

It should also be appreciated that the terminal devices in the communication system described above may also be referred to as User Equipment (UE), access terminals, subscriber units, subscriber stations, mobile stations, remote terminals, mobile devices, user terminals, wireless communication devices, user agents, or user equipment. The terminal device in the embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an augmented reality (augmented reality, AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned driving (self-driving), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation security (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), and so on. The embodiments of the present application are not limited to application scenarios. The terminal device and the chip that can be set in the terminal device are collectively referred to as a terminal device in this application. In order to facilitate understanding of the present application, before introducing the communication method provided in the present application, a brief description will be first made of concepts related to the present application.

For ease of understanding, a brief description of related terms and related techniques related to embodiments of the present application will be first provided.

Propagation type of sidelink communication

The communication system of the Sidelink is similar to the wireless communication system, and can also support the transmission modes of broadcasting, unicasting and multicasting. Broadcasting is similar to a base station broadcasting system information to terminals, e.g., the base station does not encrypt to UEs, transmits broadcast service data that can be received by any other UE within effective reception range if interested in the broadcast service. Unicast is similar to data communication after a radio resource control (radio resource control, RRC) connection is established between a UE and a base station, requiring that a unicast connection be established first between two UEs. After the unicast connection is established, the two UEs may communicate data, which may or may not be encrypted, based on the negotiated identity. In contrast to broadcast communication, in unicast communication, unicast communication can only be performed between two UEs that have established unicast connection. Multicast communication refers to communication among all UEs in a communication group, and any UE in the group can send and receive data of the multicast service.

Based on any of the above propagation types, a source identifier (source ID) and a destination identifier (destination ID) need to be carried when data transmission is performed on a sidelink. In the present embodiment, the above-described identification is for layer 2 (layer 2, L2) of the UE. Specifically, the upper layer of the UE is a PC5-S layer for terminal-to-terminal communication. This upper layer may be referred to as a Non-access stratum (NAS) layer, a V2X layer, or a PC5-S layer. Layer 2 of the UE may be an AS layer for communication between the terminal and the base station. For broadcasting, the target identifier corresponds to a broadcasting service, and the source identifier can be understood as the identifier of the UE at the transmitting end; for unicast, the target identifier is an L2 identifier allocated to the unicast connection by the receiving end UE, and the source identifier is an L2 identifier allocated to the unicast connection by the transmitting end UE; for multicast, the target identifier corresponds to a group, and the source identifier may be understood as an identifier of the UE at the transmitting end.

One possible way is to transmit and receive data via a Side Link (SL) of D2D or V2X, as shown in fig. 2a and 2 b. Where SL refers to D2D and SL links as shown in fig. 2a and 2 b. In SL, data transmission between terminal devices may not be relayed through network devices, i.e. SL may be a transmission link between terminal devices.

As shown in fig. 2b, the vehicle may acquire road condition information or receive information service in time through V2V, V2I, V P or V2N, and these communication modes may be collectively referred to as V2X communication. Fig. 2b (1), fig. 2, and fig. 3) are schematic diagrams of V2V, V2I, V P, respectively. Where 110 is a network device. The network device may be, for example, an E-UTRAN.120 may represent a vehicle, 130 may represent roadside infrastructure, and 140 may represent pedestrians. Taking the most common V2V communication and V2I communication as an example, as shown in a diagram (1) in fig. 2b, the vehicles can broadcast the information of own speed, running direction, specific position, whether emergency brake is stepped on or not and the like to surrounding vehicles through the V2V communication, and the drivers of the surrounding vehicles can better sense traffic conditions outside the sight distance by acquiring the information, so that dangerous conditions can be predicted in advance and avoided. For V2I communication shown in the diagram (2) in fig. 2b, besides the above-mentioned interaction of security information, roadside infrastructure (RSU), for example, may provide various service information and access to a data network for vehicles, so that functions such as no-parking charging and in-vehicle entertainment are greatly improved.

Sidelink resources

The sidelink resources are resources for communication between terminals. The sidelink resources may include sidelink resources of a frequency domain and sidelink resources of a time domain. The present application mainly discusses sidelink resources in the frequency domain, and the sidelink resources appearing later can be understood to refer to the sidelink resources in the frequency domain. In addition, the sidelink in this application may also be referred to as a sidelink or sidelink, and is generally described below.

From a transmission type perspective, the sidelink resources may include sidelink transmit resources and sidelink receive resources. Wherein the sidelink transmission resources are used for transmitting information, such as control information and/or data. The sidelink reception resources are used for receiving information, such as control information and/or data.

Optionally, the sidelink signal may comprise control information and/or data and/or feedback information carried on the sidelink channel.

Alternatively, the control information may be information for scheduling data, such as downlink control information (Downlink control information, DCI) and side link control information (sidelink control information, SCI) in the prior art. The feedback information may refer to feedback information such as uplink control information (Uplink control information, UCI), side link feedback information (SFCI), etc. in the related art. The control information may be carried over a control channel, such as a PSCCH, physical sidelink control channel. Feedback information may be carried over a feedback channel, such as a PSFCH, physical sidelink feedback channel.

Alternatively, the data may refer to a generalized signal, may be a data packet, or may be a transport block or codeword. Data may be carried over data channels such as PSSCH, physical sidelink shared channel, etc.

Side link data radio bearer

Communications in the NR sidestream network may be differentiated based on the manner in which the traffic flows, such as IP flows or ethernet flows, may be understood as corresponding to different traffic. The traffic flows are differentiated into different QoS flows based on different QoS parameters or characteristics. Specifically, the base station maps the QoS flow to a sidelink data radio bearer (data radio bearer, DRB), or defines a mapping relationship between the QoS flow and the sidelink DRB. For example, the base station maps different QoS flows to different sidelink DRBs or maps QoS flows with similar parameters to the same sidelink DRBs. The terminal establishes a sidelink DRB based on the mapping relation, and sends the corresponding QoS stream to other terminals. The sidelink DRB is used for transmitting data between terminals.

Logical channel

Uplink data can be classified according to different types of terminal transmission services and correspond to different logic channels. Accordingly, the logical channel information may be a Logical Channel (LCH) identification and/or a logical channel group (logic channel group, LCG) identification. It will be appreciated by those skilled in the art that the identification of the logical channel or group of logical channels is within the scope of the present invention. The LCG may be composed of at least one LCH, for example, 4 LCHs or 8 LCHs may each constitute one LCG, with the difference that the size of the LCG data composed of different numbers of LCHs is different. In general, uplink resource types corresponding to different LCHs may be the same or different, uplink resource types corresponding to different LCHs in one LCG may be the same or different, and one LCH may correspond to at least one uplink resource type. As another example, the priority order of the different LCHs/LCGs may be determined by the nature of the uplink data itself that they carry. The priority order of LCH/LCG may be understood as the order in which the terminal sends uplink data to the base station. For example, the LCH/LCG priority order may be determined according to any one or more of the following:

The severity of the uplink data on the time delay requirement;

the data size of the uplink data;

waiting time of uplink data in the buffer area; or (b)

Uplink data type.

Alternatively still, the priority of an LCG may be associated with an LCH within the LCG. For example, the LCG includes LCH1 and LCH2, wherein the LCG1 has a higher priority than LCG 2. At this time, the priority of the LCG may refer to the LCG1 priority or be the same as the priority of LCG 1.

In V2X systems, UEs within network coverage, whether broadcast, unicast or multicast, may acquire SL bearer configurations from the base station.

One possibility is that the SL bearer identity and the SL logical channel identity of the UE are both provided by the base station. For example, both UEs connected in unicast are within the service range of the base station, the base station can know the correspondence of the above-mentioned identifiers, and can ensure that the SL bearer identifiers and the SL logical channel identifiers provided to both UEs match each other. Further, the base station sends the correspondence between the sidelink (hereinafter abbreviated as SL) bearer and the air interface (hereinafter abbreviated as Uu) bearer to the UE. Specifically, the base station may send the corresponding relationship between the SL bearer identifier and the Uu bearer identifier, and the corresponding relationship between the SL logical channel identifier and the Uu logical channel identifier to the UE.

Another possibility is to consider the scenario that the UEs at the receiving end and the transmitting end do not belong to the coverage of the same base station, i.e. UE1 and UE2 are connected to different base stations, which results in that the configurations provided by the two base stations for the two UEs respectively cannot match each other. At this time, the base station transmits the partial configuration of the SL bearer to the UE. The remaining configuration for the SL bearer, such as the SL logical channel identity, is typically allocated by the UE itself. For unidirectional bearing, the UE does not need to interact with the logic channel identifier in advance, the UE at the transmitting end carries the SL logic channel identifier during data transmission, and the UE at the receiving end establishes the SL bearing/SL logic channel for data reception after receiving the data, and does not need to rely on base station configuration. At this time, the SL bearer/SL logical channel established by the receiving end UE is not controlled by the base station, so the base station cannot configure the corresponding relationship between the Uu bearer and the SL bearer of the dual-interface connection performed by the receiving end UE.

In the embodiment of the invention, the base station realizes the matching of Uu bearing and SL bearing based on the Uu and PC5 dual interfaces between the configuration terminals, thereby improving the communication efficiency between the terminals. In addition, regarding the configuration or connection of the dual interfaces, it may be understood that any one of the following communication methods between terminals is implemented based on the configuration or the link: dual communications based on Uu and PC5 interfaces, communications based on Uu interface only, or communications based on PC5 interface only. The data distribution or data replication can be realized based on the dual communication of Uu and PC5 interfaces, which will be described in detail below.

Fig. 3 is a schematic flow chart of a communication method provided in the present application. In the conventional sidelink scenario, the communication equipment is used as a terminal, and the network equipment is used as a base station for description. The communication device and the network device may be chips, or implemented by chips, which are not limited in the embodiments of the present application.

The method comprises the following steps:

301. the first communication device transmits the correspondence of the sidelink configuration information and the sidelink logical channel information to the network device.

302. The first communication device receives radio link configuration information from the network device.

303. The first communication device performs first communication with the second communication device based on the wireless link configuration information

In the embodiment of the invention, taking the terminal as an example, the terminal can send the corresponding relation between the side link configuration information and the side link logic channel information to the network equipment for communication between the terminals. Or taking the base station as an example, the base station receives the corresponding relation between the side link configuration information and the side link logic channel information from the terminal, and sends the wireless link configuration information to the terminal for communication between the terminals.

Optionally, in terms of a network architecture in which the access network device includes a CU and a DU, the correspondence is sent by the terminal to the CU through the DU. For example, the DU does not parse the correspondence, but directly passes through the protocol layer encapsulation and then is transmitted to the CU. After the CU analyzes the correspondence, it further needs to inform the DU of the correspondence, which is used for the DU to generate a corresponding radio link configuration for the terminal, where the specific content of the radio link configuration may refer to the following.

Those skilled in the art will appreciate that the dual interface configuration refers to SL data that may be transferred over the Uu interface and/or the PC5 interface. Specifically, the base station forwards the SL data packet of the transmitting end UE to the receiving end UE through the Uu interface, or the SL data of the transmitting end UE is directly transmitted to the receiving end UE through the PC5 interface. The SL packet may be a sidelink packet data convergence protocol packet, as described in detail below in connection with the protocol stack of the dual interface configuration.

As shown in fig. 2c, the protocol stack of the side link communication based terminal comprises at least one of the following protocol layers: a sidelink traffic data adaptation (Service Data Adaptation Protocol, SDAP) layer, a sidelink packet data convergence protocol (PDCP, packet Data Convergence Protocol) layer, a sidelink radio link control (RLC, radio Link Control) layer, a sidelink medium access control (MAC, media Access Control) layer, and a sidelink Physical (PHY) layer. The protocol stack of the base station based on the side link communication comprises at least one of the following protocol layers: uu RLC, uu MAC and Uu PHY.

The SL PDCP layer is mainly used for compressing and decompressing/encrypting and decrypting information; the SL RLC layer is mainly used for realizing the related functions of automatic repeat request (ARQ, automatic Repeat Request), segmenting and cascading information or recombining segmented and cascading information; the SL MAC layer is mainly used for selecting the transmission format combination and realizing the related functions of scheduling and hybrid automatic repeat request (HARQ, hybrid Automatic Repeat Request); the SL PHY layer is mainly used for providing information transmission service for the MAC layer and the higher layer, and performs coding modulation processing or demodulation decoding processing according to the selected transmission format combination. Therefore, in the embodiment of the present invention, the terminal protocol stack may be aggregated on any one of the PDCP layer, RLC layer or MAC layer. For example, the reliability of information transmission can be improved by encrypting and decrypting the information in the PDCP layer. The adaptation layer is used for carrying out conversion processing between the base station and the terminal protocol stack on the data, and can ensure the conversion of the data between the protocol stacks by setting the adaptation layer, so that the configuration of the protocol stacks in the base station is more flexible.

Optionally, in the embodiment of the present invention, the terminal protocol stack may be directly connected to at least one protocol layer of the base station side protocol stack through an internal interface. In particular, if data transmitted between terminals does not need to be (e.g., format) converted while passing through at least one protocol layer of the base station protocol stack, the terminal protocol stack may be directly connected to at least one protocol layer in the base station side protocol stack.

The above method can be triggered in three ways:

in the mode 1, the UE at the transmitting end triggers dual-interface configuration, and actively reports the SL logical channel identifier allocated for SL communication to the base station.

Mode 2, base station triggers dual interface configuration. For example, the base station requests the allocated SL logical channel identification from the transmitting UE and provides the transmitting UE with configuration information of a radio link configuration such as Uu interface. For another example, the base station queries the UE at the transmitting end for the SL logical channel identifier, and provides the UE at the transmitting end with the configuration information of the Uu interface. Or the base station firstly provides SL configuration for the UE at the transmitting end, and then the UE indicates SL logic channel identification to the base station.

Mode 3, the receiving end UE triggers dual-interface configuration, and sends an SL logical channel for receiving data from the transmitting end UE to the base station. Embodiments of the present invention do not define the sequential relationship of 301 and 302. Taking the mode 2 as an example, for the base station to trigger the dual-interface configuration, the UE at the transmitting end may report the corresponding relationship between the SL configuration and the SL logical channel to the base station first, and then receive the radio link configuration from the base station; or, the base station may first send the radio link configuration to the UE at the transmitting end, and then obtain the corresponding relationship between the SL configuration and the SL logical channel from the UE at the transmitting end.

In addition, as for the base station in 302, radio link configuration may be transmitted to the transmitting-end UE and the receiving-end UE, respectively. In particular, the radio link configuration may include radio link bearer configuration information, or further include sidelink logical channel information. For example, the radio link bearer configuration may be an RLC bearer configuration of the Uu interface that enables transmission of a side link packet data convergence protocol (packet data convergence protocol, PDCP) Packet Data Unit (PDU) between the UE and the base station.

Optionally, the method further includes the communication device receiving side link configuration information sent by the network device. In one aspect, based on the sidelink configuration information, the communication device may determine a correspondence between the sidelink configuration information and sidelink logical channel information, and then send the sidelink configuration information and the sidelink logical channel information to the network device. On the other hand, the transmitting UE may perform PC5 interface communication with the receiving UE based on the acquired sidelink configuration information.

In this embodiment, the UE receives a sidelink configuration sent by the base station, where the sidelink configuration may be broadcast by the base station or sent to the UE through RRC dedicated signaling. For example, when the UE is in an idle state or inactive state, the base station transmits a sidelink configuration to the UE through a broadcast message. And when the UE is in a connection state, the base station sends the sidelink configuration to the UE through RRC dedicated signaling.

Such as by the access network device sending system information or RRC public information to the terminal. The system information or the common RRC information may be parameters of a cell level. The sidelink resources may be configured for a group of terminals by means of configuration of system information or configuration of RRC common information, and in a specific implementation, the access network device may send system information or RRC common information to a group of terminals, where the system information or RRC common information is used to configure sidelink resources for each terminal. Since the system information or the RRC common information is addressed to a group of terminals, the sidelink resources configured by the system information or the RRC common information may be used for multicast transmission between the terminals in the group, e.g., the transmitting UE may multicast data and/or control information using the sidelink resources configured by the system information or the RRC common information, and other terminals in the group, e.g., the receiving UE may receive data or control information on the sidelink resources.

As well as RRC dedicated information sent to the terminal by the access network device. The RRC-dedicated information may be a terminal-level parameter (or referred to as a UE-level parameter) for which parameter configuration is performed. For the configuration mode of the RRC dedicated information, the sidelink resource may be configured for a single terminal, and in a specific implementation, the access network device may send the RRC dedicated information to the single terminal, where the RRC dedicated information is used to configure the sidelink resource for the terminal. Since the RRC-dedicated information is addressed to a single terminal, the sidelink resources configured by the RRC-dedicated information may be used for unicast transmission between terminals, e.g., terminal 1 may unicast data or control information to terminal 2 using the sidelink resources configured by the RRC-dedicated information.

Still alternatively, the side link resources are pre-configured for the terminal by the operator or in a predefined manner in a standard protocol. By means of the pre-configured configuration mode, the side link resources can be configured for one or more terminals, and in a specific implementation, the network management system of the operator can respectively send pre-configured information to each terminal, wherein the pre-configured information is used for respectively configuring the side link resources for each terminal. Since the pre-configuration information is addressed to a plurality of terminals, the side link resources configured by the pre-configuration information may be used for broadcast transmission between terminals, e.g., terminal 1 may broadcast data and/or control information using the side link resources configured by the pre-configuration information, and other terminals, e.g., terminal 2, may receive data and/or control information on the side link resources. Of course, in practical application, the sidelink resources configured by the preconfigured information may also be used for multicast transmission and/or for unicast transmission, which is not limited in this application.

In the embodiment of the present invention, the sidelink configuration information may be an SL bearer indication. The SL bearer indication is used for indicating at least one SL bearer, and the transmitting end UE may send SL data to the receiving end UE through the SL bearer. Specifically, the SL bearer indication may include a bearer configuration index, such as a configuration index of a sidelink radio bearer Uu interface (slrb-Uu-configcindex) and/or a configuration index of a sidelink radio link control bearer (SL-RLC-bearconfigcindex), where the bearer configuration index generally corresponds to one SL bearer. The sidelink logical channel information may include a sidelink logical channel identifier (sl-logicalchannel identity), where a logical channel identifier generally corresponds to a logical channel or a logical channel group.

In an embodiment of the present invention, the first communication device sends indication information to the network device, where the indication information is used to indicate communication with the second communication device based on at least one of the following manners: data splitting on the side link and the wireless link; data replication on the sidelink and the wireless link; communication is entirely via the wireless link. For example, data transfer may be split by PC5 and Uu, or duplicated (duplicate), or Uu only. PC5 and Uu split data, for example, is sent from PC5 to UE2 in part and from Uu to UE2 in another part for UE 1. The data for the PC5 and Uu repetition, for example, for the UE1 is duplicated in two, one sent from the PC5 and one sent from Uu. Uu only is, for example, the data of UE1 is all sent from Uu to UE2. Illustratively, the SL PDCP packet of the UE1 is transmitted to the Uu RLC layer, uu MAC layer, uu PHY layer, and Uu MAC layer of the protocol stack of the UE2 corresponding to the base station through the Uu RLC layer, uu MAC layer, uu RLC layer, and Uu PHY layer of the protocol stack of the UE1 corresponding to the base station, and finally transmitted to the Uu PHY layer, uu MAC layer, and Uu RLC layer of the UE2.

Optionally, the method further includes the first communication device sending a communication type or indication information to the network device, where the indication information is used to indicate a communication type of the first communication device and the second communication device. For example, the communication type may be unicast, multicast or broadcast. Or, the network device transmits the communication type or the indication information to the first communication device.

Specifically, the broadcast transmission may be referred to as broadcast sidelink signal communication, also may be referred to as sidelink communication of a broadcast service, or communication of which transmission type is broadcast sidelink; multicast transmission may be referred to as multicast sidelink signal communication, also may be referred to as sidelink communication of a multicast service, or communication of a sidelink whose transmission type is multicast; unicast communication may be referred to as unicast sidelink signal communication, also may be referred to as sidelink communication of unicast traffic, or communication of a transmission type of sidelink that is unicast.

Optionally, the method further comprises the first communication device sending an identification of the second communication device to the network device. Typically, the identification is associated with the communication type or indication information described above. The terminal identifier in the present application may include a radio network temporary identifier or a layer 2 (l 2) identifier. The L2 identity is used to indicate at least one of a sidelink destination identity or a sidelink source identity. The radio network temporary identifier may be an identity identifier for identifying the terminal, and the value may be 0 to 65535. The sidelink target identifier may refer to an L2 identifier allocated by the terminal on the receiving side of the sidelink communication for the unicast connection. Such as an identification corresponding to the terminal of the receiving destination of the sidelink signal. The sidelink source identifier may be an L2 identifier allocated to the unicast connection by the terminal on the transmitting side of the sidelink communication. Such as an identification corresponding to the terminal from which the sidelink signal was transmitted.

For mode 2, base station triggered dual interface configuration, the method further comprises: the first communication device receives a first message from the network device requesting the logical channel information. Optionally, the first message includes at least one of: the sidelink configuration information; and the indication information is used for indicating that the communication type of the first communication equipment and the second communication equipment is unicast or multicast.

For mode 3, i.e. the receiving end UE triggers dual interface configuration, the method further comprises: the network device receives second indication information from the second communication device, and is used for indicating the network device to provide the wireless link configuration information.

Specifically, the second indication information may include at least one of: the indication information is used for indicating that the communication type between the first communication equipment and the second communication equipment is unicast or multicast; the side link logical channel information; an identification of the first communication device.

The second indication information may also be used to indicate that communication between the first communication device and the second communication device is based on at least one of: data splitting on the side link and the wireless link; data replication on the sidelink and the wireless link; communication is entirely via the wireless link.

Optionally, the method further comprises: the network device sends the target identifier and the source identifier corresponding to the data to the second communication device by the first communication device. The destination identification and the source identification are used for multicast transmission.

The following describes the three modes in detail. For simplicity of description, the transmitting UE will be hereinafter referred to as UE1, and the receiving UE will be hereinafter referred to as UE2. Also, with unicast examples, one skilled in the art will appreciate that embodiments of the present invention may be equally applicable to multicast and broadcast.

1. Implementation mode one of triggering double-interface configuration by transmitting end UE

As shown in fig. 3a, the present implementation includes the following steps.

401: a SL unicast connection is established between UE1 and UE2.

402: the base station transmits the SL configuration to UE 1.

403: the UE1 sends the corresponding relation between the SL bearer configuration index and the SL logical channel identifier to the base station.

In this embodiment, the UE1 triggers dual-interface configuration, and when the UE1 determines that the configuration is to be triggered, a report message may be sent to the base station, where the report message carries the SL bearer configuration index and the SL logical channel identifier corresponding to the SL bearer configuration index. Optionally, indication information of unicast connection between UE1 and UE2 may also be reported, where the indication information may be an identification or an index.

Alternatively, UE1 may decide whether to activate the dual interface configuration. For example, UE1 determines to trigger the above configuration by itself or according to a preset rule. For example, when the amount of data to be transmitted is greater than a threshold, or when the reliability is below a threshold, or when the rate is below a threshold. In particular, the threshold value may be obtained for the UE1 from a network device, such as a base station or a core network. When the UE1 acquires a plurality of rules from the network, the reporting message may carry indication information, which indicates to trigger the reporting rule.

Optionally, UE1 sends indication information to the base station for indicating that the communication with UE2 is based on at least one of the following: data splitting on the side link and the wireless link; data replication on the sidelink and the wireless link; communication is entirely via a wireless link. The indication information can also be carried in the report message.

Further, UE1 may also carry an identity of UE2 in the reporting message, such as a serving cell identity of UE2 and/or a cell radio network temporary identity (cell radio network temporary identity, C-RNTI) of UE 2. UE1 may receive the RRC message via the PC5 interface and obtain the identity of UE2 from UE 2.

404: the base station provides RLC bearer configuration of Uu interface for UE 1.

In order to realize data transmission between UE1 and UE2 through the base station, the base station may provide the UE1 with a configuration of RLC bearers on the Uu interface.

Specifically, the configuration of the Uu RLC bearer includes at least one of the following Uu interfaces: RLC entity configuration, logical channel configuration, media intervention control (media access control, MAC) configuration. To enable association of a SL bearer with a Uu RLC bearer, the Uu RLC bearer configuration may also include a sidelink logical channel identification or SL bearer indication as described above. In particular, the SL bearer indication may be an SL bearer configuration index (slrb-Uu-configIndex or SL-RLC-BearerConfigIndex as described above). Optionally, the base station may also send indication information of the unicast connection to the UE 1.

Optionally, the base station provides the UE1 with a duplicate configuration of the SL PDCP, or provides the UE with a data amount threshold for the SL PDCP to perform a offloading operation.

Further, the base station may also provide a SL RLC bearer release configuration for UE1, for instructing UE1 to release the SL RLC bearer, so as to implement transmission of only Uu interface (Uu only).

405: the base station provides Uu RLC bearer configuration for UE 2.

In order to realize data transmission between UE1 and UE2 through the base station, in addition to establishing Uu RLC bearer between UE1 and the base station, uu RLC bearer between UE2 and the base station is also required to be established. For example, the base station may provide Uu RLC bearer configuration for UE2, and the specific configuration content may refer to step 404 described above, i.e. the base station provides Uu RLC bearer configuration for UE 1. In general, the configuration provided by the base station to UE2 indicates SL bearers to UE2 using the SL logical channel identity.

The execution sequence of the

steps

404 and 405 is not limited in this embodiment, that is, the base station may configure UE1 first, and UE2 is configured after the UE1 replies to complete the configuration; or firstly configuring the UE2, and after the UE2 replies that the configuration is completed, configuring the UE1; or simultaneously configure UE1 and UE2.

Based on the mode 1, the dual-interface configuration triggered by the UE1 is enabled, so that data transmission between the UE1 and the UE2 can be flexibly performed based on the dual interfaces. On one hand, PC5 and Uu dual-interface split transmission is selected, so that throughput is improved; on the other hand, uu only or Uu and PC5 double interfaces are selected for data copying, so that reliability is improved.

2. Implementation mode II of base station triggering double-interface configuration

The difference from implementation one is that in implementation two, the dual interface configuration is provided for UE1 and UE2 by the base station initiation.

Two scenarios are described in detail below.

The step of scenario one in implementation two is shown in fig. 3 b.

501 and 502 are similar to 401 and 402 in implementation one and will not be described in detail below.

503: the base station transmits a first message to UE1 for querying the side link logical channel information.

Optionally, the base station decides to configure a dual interface configuration for the UE, e.g. when it recognizes that the current PC5 interface situation is not good or the current PC5 interface is considered not meeting the current service requirement of the UE, the base station triggers 503. Specifically, the poor condition of the current PC5 interface may be that the measurement result of the PC5 interface is lower than the threshold value, or that the data transmission on the PC5 interface fails more, or the like.

Optionally, the first message carries a SL bearer configuration index for indicating which bearer's logical channel information of the unicast connection is queried. Further, the first message may further include a unicast connection identifier (target identifier) for indicating which logical channel information of the unicast connection is to be queried.

Steps 504 to 506 are similar to steps 403 to 405 in the first embodiment, and will not be described here again.

It can be seen that in the above scenario one, the query and configuration of the UE1 by the base station needs to be completed in two steps, which may increase the duration of the configuration procedure, and the following scenario two further avoids the problem.

The second scenario step in implementation two is shown in fig. 3 c.

601 and 602 are similar to 401 and 402 in implementation one.

603: the base station provides Uu RLC bearer configuration for UE 1.

The specific design of this configuration can be referred to as 404 in mode 1. It should be noted that, for scenario two, before the base station sends the indication information to UE1, the base station does not know the SL logical channel identifier allocated by UE1, so the Uu RLC bearer configuration sent by the base station to UE1 generally includes the SL bearer configuration index.

604: the UE1 feeds back to the base station a configuration second message comprising the SL logical channel identity.

In this scenario, after receiving the configuration of the base station, the UE1 may reply to the base station with a second message, which is used to indicate that the configuration is completed. Therefore, the UE1 may further carry, in the second message, the SL logical channel identifier corresponding to the SL bearer configuration index indicated in step 2.

The base station completes the configuration and inquiry through one message, through steps 603 and 604.

Step 605 is identical to step 405 in implementation one.

In the second mode, aiming at the scene of triggering the dual-interface configuration by the base station, the SL logic channel identifier allocated by the UE1 is obtained by the base station initiating the query, and the configuration of the UE2 is further completed based on the SL logic channel identifier, so that the UE1 and the UE2 communicate through the base station.

3. Implementation mode III of triggering double-interface configuration by receiving end UE

In mode one, a dual interface configuration is initiated by UE1, where UE1 is the sender of SL data. As a transmitting UE, UE1 receives the SL bearer configuration index from the base station, thereby establishing the SL bearer, and allocates a SL logical channel identifier to the SL bearer. As the receiving end UE, UE2 is a SL bearer established after receiving the SL data of UE1, and uses the logical channel identifier received when receiving the SL data.

In the third mode, the receiving end UE, namely UE2 initiates dual-interface configuration, aiming at the following two scenarios.

The steps of scenario one in implementation three are shown in fig. 3 d.

701 and 702 are the same as 401 and 402 of implementation one.

703: the UE2 transmits indication information to the base station.

In this embodiment, UE2 decides whether to initiate dual interface configuration. Illustratively, the UE2 acquires rules from the base station in advance, for example, N consecutive data packets are lost, or N consecutive data packets are lost for a fixed duration, or M data packets are lost for a fixed duration, etc.

The indication information sent by the UE2 to the base station is used to instruct the base station to provide dual interface configuration.

Optionally, the indication information includes SL quality of service (quality of service, qoS) monitored by the UE 2.

Optionally, the indication information includes indication information of unicast connection. Further, at least one of the following may be included: SL logical channel identity, UE1 identity, and instruct PC5 and Uu to split, duplicate, or Uu only. The above identification or indication may refer to 403 in one of the ways. The identity of the UE1 is, for example, a serving cell identity of the UE1 and/or a cell radio network temporary identity (cell radio network temporary identity, C-RNTI) of the UE 1.

Alternatively, the indication information sent by the UE2 to the base station may be understood as requesting the base station to provide a dual interface configuration, or providing auxiliary information to the base station for assisting the base station in making decisions.

Steps 704 to 707 are similar to steps 503 to 506 of scene one in implementation two. Alternatively, instead of SL bearer configuration index, SL logical channel identification may be used in the query message. And inquiring the SL bearer configuration index to determine the QoS requirement of the bearer, and completing configuration.

The steps of scenario two in implementation three are shown in fig. 3 e.

801 to 802 are the same as 401 to 402 in the first embodiment.

803 are identical to 703 of scene one in implementation three above.

804-806 are similar to steps 603-605 in scenario two of implementation two. Similarly, as an alternative, the SL bearer configuration index may be replaced with the SL logical channel identity in the configuration message from the base station to UE 1.

Aiming at the requirements of receiving terminal UE, the receiving terminal UE triggers dual-interface configuration, and the base station completes the configuration of the receiving terminal UE and the transmitting terminal UE, so that the receiving and transmitting double-side UE can communicate through the PC5 interface and the Uu interface, and the reliability of the communication between the terminals is improved.

4. Implementation mode IV of dual-interface configuration SL multicast communication

The three previous implementations are all described by taking the SL unicast communication between UE1 and UE2 as an example, and the final effect is that unicast communication can be performed between UE1 and UE2 through the PC5 interface, and the unicast connection data can also be forwarded through the base station.

In the fourth mode, the scenario is extended to SL multicast communication, i.e., UE1 needs to send SL data to multiple UEs in the group through the PC5 interface. In order to improve the performance of multicast communication, data transmission can be performed by means of the Uu interface of the base station, and because the receiving end UE includes a plurality of UEs, according to the above three implementation manners, the base station needs to forward data to the plurality of UEs on Uu in a unicast manner, which results in excessive overhead of air interfaces. In the fourth aspect, therefore, the base station is considered to simultaneously forward data of the transmitting UE to a plurality of receiving UEs in a multicast (multicast) manner. Wherein the base station transmits data in a multicast manner like a multimedia broadcast multicast service (Multimedia Broadcast Multicast Service, MBMS) or a single cell point-to-multipoint (single cell point to multipoint, SC-PTM) mechanism of the LTE system.

The protocol stack for multicast communication differs from that for unicast communication in that the communication between the base station and the receiving UE is not based on unicast data radio bearers (data radio bearer, DRB) but on multicast radio bearers (multicast radio bearer, MRB).

In a multicast scenario, dual interface configuration may be triggered by a transmitting UE, a base station, or a receiving UE. The difference is that the configuration provided by the base station to the receiving end UE may specifically include at least one of the following:

The target identifier and the source identifier used by the UE1 (i.e. the transmitting UE) in the band for transmitting data replace the identifiers of the unicast connection carried in the first to third modes.

When the base station provides configuration for the receiving end UE, besides the C-RNTI used in air interface communication, the base station may also provide an identifier for receiving air interface multicast broadcast data, such as a group radio network temporary identifier (group radio network temporary identity, G-RNTI). Optionally, the base station may also provide the UE2 with air interface resource configuration of multicast broadcast data.

In consideration of the data transmission requirement of a plurality of UEs in one SL group, the configuration of the receiving UE is provided, including multicast broadcast configuration. Each set of configuration corresponds to indication information of the sending end UE in one group, and the indication information comprises a target identifier and a source identifier which are used when the sending end UE sends data.

In the fourth mode, the supporting UE sends data to other UEs in the SL group through the base station, so as to implement dual-interface communication of the SL multicast service, thereby improving throughput and reliability of the SL multicast communication.

Fig. 4 is a schematic hardware structure of a communication device 40 according to an embodiment of the present application. The communication device 40 comprises at least one processor 401, a communication bus 402, a memory 403 and at least one communication interface 404.

The processor 401 may be a general purpose central processing unit (central processing unit, CPU), microprocessor, application Specific Integrated Circuit (ASIC), or one or more integrated circuits for controlling the execution of the programs of the present application.

Communication bus 402 may include a path to transfer information between the aforementioned components.

The communication interface 404 uses any transceiver-like device for communicating with other devices or communication networks, such as ethernet, radio access network (radio access network, RAN), wireless local area network (wireless local area networks, WLAN), etc.

The memory 403 may be, but is not limited to, a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (random access memory, RAM) or other type of dynamic storage device that can store information and instructions, or an electrically erasable programmable read-only memory (electrically erasable programmable read-only memory, EEPROM), a compact disc read-only memory (compact disc read-only memory) or other optical disc storage, a compact disc storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory may be stand alone and coupled to the processor via a bus. The memory may also be integrated with the processor.

The memory 403 is used for storing application program codes for executing the embodiments of the present application, and the processor 401 controls the execution. The processor 401 is configured to execute application program codes stored in the memory 403, thereby implementing the communication method provided in the above-described embodiment of the present application.

Alternatively, in the embodiment of the present application, the processor 401 may perform the functions related to the processing in the communication method provided in the foregoing embodiment of the present application, and the communication interface 404 is responsible for communicating with other devices or networks, which is not specifically limited in the embodiment of the present application.

In a particular implementation, processor 401 may include one or more CPUs, such as CPU0 and CPU1 of FIG. 4, as an embodiment.

In a particular implementation, as one embodiment, communication device 40 may include multiple processors, such as processor 401 and processor 408 in FIG. 4. Each of these processors may be a single-core (single-CPU) processor or may be a multi-core (multi-CPU) processor. A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (e.g., computer program instructions). It will be appreciated that fig. 4 only shows a simplified design of the communication device 40. In practical applications, the communication apparatus may comprise any number of input devices, output devices, processors, memories, communication interfaces, and any number of communication units may provide the above functions, alone or in combination.

In a specific implementation, as an embodiment, the communication apparatus 40 may further include an output device 405 and an input device 406. The output device 405 communicates with the processor 401 and may display information in a variety of ways. For example, the output device 405 may be a liquid crystal display (liquid crystal display, LCD), a light emitting diode (light emitting diode, LED) display device, a Cathode Ray Tube (CRT) display device, or a projector (projector), or the like. The input device 406 is in communication with the processor 401 and may accept user input in a variety of ways. For example, the input device 406 may be a mouse, keyboard, touch screen device, or sensing device, among others.

In addition, as described above, the communication apparatus 40 provided in the embodiment of the present application may be a chip, a terminal, a base station, a CU, or a DU, or a device having a similar structure in fig. 4. The embodiments of the present application are not limited in the type of communication device 40.

Fig. 5 is a schematic structural diagram of a communication device 500 of a communication method according to an embodiment of the present application, where the communication device may be a terminal, a base station, a device with a terminal or a base station function, a chip, or the like in each embodiment. The terms or nouns appearing below may be understood in conjunction with the description above; the steps or acts that appear below, the specific details or implementation thereof may be understood as well in conjunction with the description above. As shown in fig. 5, the communication apparatus 500 may include: a processing unit 510 and a transceiver unit 530. Alternatively, the transceiver unit in the above-mentioned communication device may include a receiving module and a transmitting module, which may be based on an antenna connection.

The transceiving unit 530 may be used to support transceiving information between a communication device and a network device. Alternatively, the above-described transceiver unit 530 may be used to perform processing performed by a communication device or a network device in the communication method described in the above-described embodiment.

In one possible design, the communication apparatus may be a terminal device or a chip configured in the terminal device, and the description below is made with the first communication device or the second communication device as an execution subject.

In one possible implementation, the first communication device sends the correspondence between the sidelink configuration information and the sidelink logical channel information to the network device; the first communication device receives wireless link configuration information from the network device; the first communication device performs first communication with a second communication device based on the radio link configuration information. Based on the communication mode, flexible configuration of communication between terminals can be realized, and the possibility of system adaptation is improved.

Optionally, the first communication device receives the sidelink configuration information from the network device; the first communication device performs second communication with the second communication device based on the side link configuration information. Thus, the communication device can acquire the sidelink configuration information for SL communication between terminals.

Optionally, the first communication device sends indication information to the network device, and the indication information is used for indicating the communication with the second communication device based on at least one of the following ways: data splitting on the side link and the wireless link; data replication on the sidelink and the wireless link; communication is entirely via the wireless link. Therefore, the communication device can autonomously determine one of a plurality of communication modes, and design complexity of the network device is reduced.

Optionally, the first communication device sends indication information to the network device, where the indication information is used to indicate that a communication type between the first communication device and the second communication device is unicast, multicast or broadcast. Therefore, the communication device can autonomously determine one of a plurality of communication modes, and design complexity of the network device is reduced.

Optionally, the first communication device sends the identification of the second communication device to the network device. In general, the identifier of the second communication device may also be sent to the network device together with the indication information, so as to implement flexible communication in combination with a communication type or a communication manner.

Optionally, the first communication device receives a first message from the network device, for requesting the logical channel information.

Optionally, the first message includes at least one of: the sidelink configuration information; and the indication information is used for indicating that the communication type of the first communication equipment and the second communication equipment is unicast or multicast.

Optionally, the radio link configuration information includes radio link bearer configuration information and the sidelink logical channel information.

In another possible implementation manner, the second communication device sends indication information to the network device, for instructing the network device to provide a dual-interface configuration; the second communication device receives wireless link configuration information from the network device; the second communication device performs a first communication with the first communication device based on the radio link configuration information.

Optionally, the indication information includes at least one of: the quality of service of the sidelink; the side link logical channel information; the indication information is used for indicating that the communication type of the first communication equipment and the second communication equipment is unicast or multicast; an identification of the first communication device; indicating communication with the second communication device is based on at least one of: data splitting on the side link and the wireless link; data replication on the sidelink and the wireless link; or communicate entirely via the wireless link.

In another possible design, the communication apparatus may be a network device or a chip configured in the network device, and the description below uses the network device as an execution body.

In one possible implementation, a network device receives a correspondence of side link configuration information and side link logical channel information from a first communication device; the network device sends wireless link configuration information to the first communication device and the second communication device, respectively, for a first communication between the first communication device and the second communication device.

Optionally, the network device sends the sidelink configuration information to the first communication device for a second communication between the first communication device and the second communication device.

Optionally, the method further comprises: the network device receives first indication information from the first communication device, and the first indication information is used for indicating communication between the first communication device and the second communication device based on at least one of the following modes: data splitting on the side link and the wireless link; data replication on the sidelink and the wireless link; communication is entirely via the wireless link.

Optionally, the method further comprises: the network device receives an identification of the second communication device from the first communication device.

Optionally, the method further comprises: the first communication device sends indication information to the network device, and the indication information is used for indicating that the communication type of the first communication device and the second communication device is unicast or multicast.

Optionally, the method further comprises: the network device sends a first message to the first communication device requesting the logical channel information.

Optionally, the method further comprises: the network device receives second indication information from the second communication device, for indicating the network device to provide the sidelink configuration information and the radio link configuration information.

Optionally, the second indication information includes at least one of: the indication information is used for indicating that the communication type between the first communication equipment and the second communication equipment is unicast or multicast; the sidelink configuration information; an identification of the first communication device.

Optionally, the second indication information is further used to indicate that the communication between the first communication device and the second communication device is based on at least one of the following ways: data splitting on the side link and the wireless link; data replication on the sidelink and the wireless link; communication is entirely via the wireless link.

Optionally, the method further comprises: the network device sends the target identifier and the source identifier corresponding to the data to the second communication device by the first communication device.

In the present embodiment, the above-described communication device or network device is presented in a form of dividing each functional module or unit in an integrated manner. "module" or "unit" herein may refer to an Application-specific integrated circuit (ASIC), an electrical circuit, a processor and memory that execute one or more software or firmware programs, an integrated logic circuit, and/or other devices that can provide the described functionality. In a simple embodiment, one skilled in the art will appreciate that the apparatus 500 may take the form shown in fig. 4, respectively. For example, the functions/implementation procedure of the transceiving unit 530 in fig. 5 may be implemented by the processor 401 and the memory 403 of fig. 4. In particular, it may be executed by the processor 401 invoking application code stored in the memory 403, which is not limited in any way by the embodiments of the present application. Alternatively, the functions/implementation procedure of the transceiver unit 530 in fig. 5 may be implemented by the processor 401 in fig. 4 or by the communication interface 404 in fig. 4, which is not limited in any way by the embodiment of the present application. In particular, it may be executed by the processor 401 invoking application code stored in the memory 403, which is not limited in any way by the embodiments of the present application.

Optionally, an embodiment of the present application provides a chip system, where the chip system includes a processor, configured to support a communication device to implement the foregoing communication method. In one possible design, the system-on-chip also includes a memory. The memory is used for storing program instructions and data necessary for the communication device. The chip system may be formed by a chip, or may include a chip and other discrete devices, which are not specifically limited in this embodiment of the present application.

The controller/processor for implementing the above base station, terminal, base station or terminal of the present invention may be a Central Processing Unit (CPU), a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, transistor logic device, hardware components, or any combination thereof. Which may implement or perform the various exemplary logic blocks, modules and circuits described in connection with this disclosure. The processor may also be a combination that performs the function of a computation, e.g., a combination comprising one or more microprocessors, a combination of a DSP and a microprocessor, and the like.

The steps of a method or algorithm described in connection with the present disclosure may be embodied in hardware, or may be embodied in software instructions executed by a processor. The software instructions may be comprised of corresponding software modules that may be stored in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC. In addition, the ASIC may reside in a terminal or base station. The processor and the storage medium may reside as discrete components in a terminal or base station.

Those skilled in the art will appreciate that in one or more of the examples described above, the functions described in the present invention may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, these functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

In the embodiment provided by the invention, the communication method provided by the embodiment of the invention is introduced from the angles of each network element and interaction among the network elements. It is understood that each network element, e.g. terminal, communication device, etc., for implementing the above-mentioned functions, comprises corresponding hardware structures and/or software modules for performing each function. Those of skill in the art will readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

The foregoing embodiments have been provided for the purpose of illustrating the general principles of the present invention in further detail, and are not to be construed as limiting the scope of the invention, but are merely intended to cover any modifications, equivalents, improvements, etc. based on the teachings of the invention.

Claims

A method of communication, comprising:

the first communication device sends the corresponding relation between the side link configuration information and the side link logic channel information to the network device;

the first communication device receives wireless link configuration information from the network device;

the first communication device performs first communication with a second communication device based on the radio link configuration information.
The communication method as claimed in claim 1, further comprising:

the first communication device receiving the sidelink configuration information from the network device;

the first communication device performs second communication with the second communication device based on the side link configuration information.
The communication method according to claim 1 or 2, characterized by further comprising:

The first communication device sends indication information to the network device, wherein the indication information is used for indicating the communication with the second communication device based on at least one of the following modes:

data splitting on the side link and the wireless link;

data replication on the sidelink and the wireless link;

communication is entirely via the wireless link.
A communication method according to any one of claims 1 to 3, further comprising:

the first communication device sends an identification of the second communication device to the network device.
The communication method according to any one of claims 1 to 4, further comprising:

the first communication device sends indication information to the network device, and the indication information is used for indicating that the communication type of the first communication device and the second communication device is unicast, multicast or broadcast.
The communication method as claimed in claim 1, further comprising:

the first communication device receives a first message from the network device requesting the logical channel information.
The communication method of claim 6, wherein:

the first message includes at least one of:

The sidelink configuration information;

and the indication information is used for indicating that the communication type of the first communication equipment and the second communication equipment is unicast, multicast or broadcast.
A communication method according to any one of claims 1 to 7, characterized in that:

the radio link configuration information includes radio link bearer configuration information and the sidelink logical channel information.
A method of communication, comprising:

the network device receives the corresponding relation between the side link configuration information and the side link logic channel information from the first communication device;

the network device sends wireless link configuration information to the first communication device and the second communication device, respectively, for a first communication between the first communication device and the second communication device.
The communication method as claimed in claim 9, further comprising:

the network device sends the sidelink configuration information to the first communication device for a second communication between the first communication device and the second communication device.
The communication method according to claim 9 or 10, characterized by further comprising:

the network device receives first indication information from the first communication device, and the first indication information is used for indicating communication between the first communication device and the second communication device based on at least one of the following modes:

Data splitting on the side link and the wireless link;

data replication on the sidelink and the wireless link;

communication is entirely via the wireless link.
The communication method according to any one of claims 9 to 11, characterized by further comprising:

the network device receives an identification of the second communication device from the first communication device.
The communication method according to any one of claims 9 to 12, characterized by further comprising:

the first communication device sends indication information to the network device, and the indication information is used for indicating that the communication type of the first communication device and the second communication device is unicast, multicast or broadcast.
The communication method as claimed in claim 9, further comprising:

the network device sends a first message to the first communication device requesting the logical channel information.
The communication method of claim 14, wherein:

the first message includes at least one of:

the sidelink configuration information;

and the indication information is used for indicating that the communication type of the first communication equipment and the second communication equipment is unicast, multicast or broadcast.
The communication method as claimed in claim 9, further comprising:

the network device receives second indication information from the second communication device, for indicating the network device to provide the sidelink configuration information and the radio link configuration information.
The communication method of claim 16, wherein:

the second indication information includes at least one of:

the indication information is used for indicating that the communication type between the first communication equipment and the second communication equipment is unicast, multicast or broadcast;

the sidelink configuration information;

an identification of the first communication device.
A method of communicating as claimed in claim 16 or 17, wherein:

the second indication information is further used for indicating that the communication between the first communication device and the second communication device is based on at least one of the following modes:

data splitting on the side link and the wireless link;

data replication on the sidelink and the wireless link;

communication is entirely via the wireless link.
The communication method according to any one of claims 16 to 18, further comprising:

the network device sends the target identifier and the source identifier corresponding to the data to the second communication device by the first communication device.
A method of communicating according to any of claims 9 to 19, wherein:

the radio link configuration information includes radio link bearer configuration information and the sidelink logical channel information.
A method of communication, comprising:

the second communication device sends indication information to the network device, and the indication information is used for indicating the network device to provide dual-interface configuration;

the second communication device receives wireless link configuration information from the network device;

the second communication device performs a first communication with the first communication device based on the radio link configuration information.
The communication method of claim 21, wherein:

the indication information includes at least one of:

the quality of service of the sidelink;

the side link logical channel information;

indication information, which is used for indicating that the communication type of the first communication equipment and the second communication equipment is unicast, multicast or broadcast;

an identification of the first communication device;

indicating communication with the second communication device is based on at least one of: data splitting on the side link and the wireless link; data replication on the sidelink and the wireless link; or communicate entirely via the wireless link.
A method of communicating as claimed in any one of claims 21 or 22, wherein:

the radio link configuration information includes radio link bearer configuration information and the sidelink logical channel information.
An apparatus for performing the method of any one of claims 1 to 23.
An apparatus comprising a processor, a memory, and instructions stored on the memory and executable on the processor, which when executed, cause the apparatus to perform the method of any one of claims 1-8, or 21-23.
An apparatus comprising a processor, a memory, and instructions stored on the memory and executable on the processor, which when executed, cause the apparatus to perform the method of any one of claims 9 to 20.
A terminal comprising the apparatus of claim 25.
A base station comprising the apparatus of claim 26.
A communication system comprising a terminal as claimed in claim 27 and a base station as claimed in claim 28.
A computer readable storage medium comprising instructions which, when run on a computer, cause the computer to perform the method of any one of claims 1 to 23.
A computer program product which, when run on a computer, causes the computer to perform the method of any one of claims 1 to 23.