Method and device for arranging HARQ feedback between terminal nodes - Patents.com

Abstract

To provide a method and a terminal for saving side-link interface resources, reducing power consumption of the terminal, and reducing interference of a side-link interface, used to accurately control whether to cause the side-link interface to transmit HARQ feedback, while guaranteeing the transmission delay and reliability of NR V2X systems.SOLUTION: In a vehicle-to-everything system, a base station includes: placing HARQ feedback activation rules of a side-link interface to a transmitting terminal; and the transmitting terminal notifying a receiving terminal of the placed HARQ feedback activation rules of the side-link interface so as to have whether to activate the HARQ feedback determined in the side-link interface based on the placed HARQ feedback activation rules of the side-link interface.SELECTED DRAWING: Figure 2C

Description

[Technical field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This application claims priority to a Chinese patent application filed with the China Patent Office on January 9, 2019, application number 201910018665.8, entitled "Method and device for configuring HARQ feedback between terminal nodes," the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the field of Vehicle-to-Everything (V2X) technology, and in particular to a method and device for arranging HARQ feedback between terminal nodes. [Background technology]

[0003] In the network transmission standard NRV2X (New Radio Vehicle to Everything) system, a Hybrid Automatic Repeat Request (HARQ) feedback mechanism has been introduced for the direct communication link Sidelink interface (referred to as PC5 interface in 3GPP (registered trademark, the same applies below)). The HARQ feedback mechanism is a feedback mechanism that, when decoding fails on the receiving side, stores the received data, requests the transmitting side to retransmit the data, combines the retransmitted data with the previously received data on the receiving side, and decodes it again, thereby reducing the number of retransmissions and delays through diversity gain.

[0004] In the NR V2X system, direct communication between terminals located close to each other is permitted. As shown in Figure 1A, the communication method mainly includes the following two types of methods. One is that communication between a network side device and a terminal is performed via a cellular communication link Device to Network (D2N) link (or a cellular communication interface, also called a Uu interface). The other is that communication between terminals is performed via a direct communication link between devices, that is, a Device to Device (D2D) link (also referred to as a direct communication link Sidelink interface).

[0005] Direct communication scenarios include the following three types: 1. Unicast communication It is one-to-one communication between terminals that communicate directly. 2.Multicast communication A terminal can transmit the same data to all terminals in a communication group at one time. 3. Broadcast communication One device can send the same data to all nearby devices at one time.

[0006] The resource allocation methods for direct communication include the following two types: 1. Resource allocation mode by network side scheduling The network side device allocates direct communication link resources to the terminal on the Uu interface based on a sidelink buffer notification (BSR, Buffer state reporting) notified from the terminal. This resource allocation mode is called mode 1 in 5G, mode 3 in Long Term Evolution LTE, and NR V2X mode 1 in NR V2X. 2. Allocation mode by autonomous resource selection on the terminal side The terminal autonomously selects resources from a transmission resource pool that is pre-configured for the terminal or broadcast by a network side device, and transmits a direct communication link. This resource allocation mode is called mode 2 in 5G, mode 4 in LTE, and NR V2X mode 2 in NR V2X.

[0007] The NR V2X system supports broadcast, multicast and unicast communication of terminals on the sidelink interface, in which when the multicast or unicast communication mode is adopted, the receiving terminal sends HARQ feedback to the transmitting terminal to make the transmitting terminal perform HARQ retransmission. As shown in Figure 1B, the HARQ feedback mechanism on the sidelink interface supports a resource allocation mode by network side scheduling, and as shown in Figure 1C, the HARQ feedback mechanism on the sidelink interface also supports an allocation mode by terminal side resource autonomous selection.

[0008] In the NR V2X system, different terminals performing direct communication are all in-service terminals, or all out-of-service terminals, or some terminals are in-service terminals and some terminals are out-of-service terminals. In this regard, the in-service terminal refers to a terminal participating in direct communication that is located within a 3GPP (the 3rd Generation Partner Project) direct communication carrier coverage, the terminal can search for a 3GPP base station, and the terminal may be controlled by the 3GPP base station when necessary. The out-of-service terminal refers to a terminal participating in direct communication that is not located within a 3GPP direct communication carrier coverage. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] International Publication No. 2019 / 004688 [Patent Document 2] Special Publication No. 2017-516361 [Non-patent literature]

[0010] [Non-Patent Document 1] ZTE, Sanechips,Discussion on Uu based resource allocation / configuration for NR V2X[online],3GPP TSG RAN WG1 #95 R1-1813179,Internet<URL:http: / / www.3gpp.org / ftp / tsg_ran / WG1_RL1 / TSGR1_95 / Docs / R1-1813179.zip> ,November 16, 2018 Summary of the Invention [Problem to be solved by the invention]

[0011] In summary, in an NR V2X system, the HARQ feedback mechanism has the following drawbacks: On the one hand, the transmission of the HARQ feedback signal occupies the resources of the Sidelink interface, and due to the half-duplex nature of the Sidelink interface, the receiving terminal cannot transmit or receive other signaling or data when transmitting the HARQ feedback signal. On the other hand, if the HARQ feedback signal is too frequent, it may interfere with the transmission by other terminals.

[0012] In the prior art, feedback resources of the Sidelink interface have been introduced in the NR V2X system, but the HARQ feedback mechanism in the NR V2X system has not been improved in view of the above shortcomings. [Means for solving the problem]

[0013] The present application provides a method and device for configuring Hybrid Automatic Repeat Request (HARQ) feedback between terminal nodes, which can precisely control whether to transmit HARQ feedback on a sidelink interface, thereby saving sidelink interface resources, reducing terminal power consumption, and reducing sidelink interface interference while ensuring the transmission delay and reliability of an NR V2X system.

[0014] According to a first aspect, an embodiment of the present application provides a method for configuring Hybrid Automatic Repeat Request (HARQ) feedback between terminal nodes, the method comprising: Configuring a HARQ feedback activation rule of a direct communication link (Sidelink) interface in a terminal; instructing the terminal of a HARQ feedback activation rule of the configured sidelink interface, so as to allow the terminal to determine whether to activate HARQ feedback in a sidelink interface according to the HARQ feedback activation rule of the configured sidelink interface; Includes.

[0015] According to a second aspect, an embodiment of the present application provides a method for a terminal to check a Hybrid Automatic Repeat Request (HARQ) feedback configuration, the method comprising: receiving a HARQ feedback activation rule of a sidelink interface of the configuration indicated by the configuration node; determining whether to activate HARQ feedback in the sidelink interface according to the configured sidelink interface HARQ feedback activation rule; Includes.

[0016] According to a third aspect, an embodiment of the present application provides a device for configuring Hybrid Automatic Repeat Request (HARQ) feedback between terminal nodes, the device including: a processor; and a memory; The processor reads the program in the memory; Configuring a HARQ feedback activation rule of a direct communication link (Sidelink) interface in a terminal; instructing the terminal of a HARQ feedback activation rule of the configured sidelink interface, so as to allow the terminal to determine whether to activate HARQ feedback in a sidelink interface according to the HARQ feedback activation rule of the configured sidelink interface; Execute.

[0017] According to a fourth aspect, an embodiment of the present application provides a terminal for an acknowledged Hybrid Automatic Repeat Request (HARQ) feedback configuration, the terminal including: a processor; and a memory; The processor reads the program in the memory; receiving a HARQ feedback activation rule of a sidelink interface of the configuration indicated by the configuration node; determining whether to activate HARQ feedback in a sidelink interface according to a HARQ feedback activation rule of the configured sidelink interface; Execute.

[0018] According to a fifth aspect, an embodiment of the present application provides a computer storage medium having stored thereon a computer program which, when executed by a processor, implements any of the solutions of the first aspect above.

[0019] According to a sixth aspect, an embodiment of the present application provides a computer storage medium having stored thereon a computer program which, when executed by a processor, implements any of the solutions of the second aspect above.

[0020] The method and device provided by the embodiments of the present application for configuring HARQ feedback between terminal nodes is based on the HARQ feedback mechanism on the Sidelink interface introduced in NR V2X, and has the following beneficial effects: Meanwhile, it is possible to precisely control whether or not to transmit HARQ feedback on the Sidelink interface, thereby saving Sidelink interface resources while ensuring the transmission delay and reliability of the NR V2X system. On the other hand, it can reduce the power consumption of the terminal, and avoid the HARQ feedback signal from interfering with the transmission of other terminals due to being too frequent, thereby reducing the interference of the Sidelink interface.

[0021] In order to more clearly describe the technical solutions in the embodiments of the present application, the following briefly introduces the drawings necessary for describing the embodiments. Of course, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without performing inventive steps. [Brief description of the drawings]

[0022] [Figure 1A] FIG. 1 is a diagram of a direct communication method of an NR V2X system provided by this embodiment. [Figure 1B] FIG. 2 is a diagram illustrating a resource allocation mode according to network side scheduling provided by the present embodiment. [Figure 1C] FIG. 2 is a diagram showing an allocation mode based on terminal-side resource autonomous selection provided by the present embodiment. [Figure 2A] A system diagram in which a base station instructs and a terminal confirms HARQ feedback configuration. [Figure 2B] This is a system diagram in which a base station instructs and a transmitting end / receiving end confirms HARQ feedback configuration. [Figure 2C] FIG. 1 is a step diagram in which a base station instructs and a terminal confirms HARQ feedback configuration. [Diagram 3] FIG. 1 is a diagram of a device for arranging HARQ feedback between terminal nodes. [Figure 4] This is a terminal that checks the HARQ feedback configuration. [Diagram 5] FIG. 1 is a modular diagram of a device for arranging HARQ feedback between terminal nodes. [Figure 6] FIG. 13 is a module diagram of a terminal for checking HARQ feedback configuration. [Figure 7] FIG. 1 is a diagram of method steps for arranging HARQ feedback between terminal nodes. [Figure 8] FIG. 1 is a diagram of method steps for arranging HARQ feedback between terminal nodes. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] Hereinafter, some terms used in the embodiments of the present application will be interpreted and explained so as to be easily understood by those skilled in the art. (1) In the embodiments of this application, the term "plurality" refers to two or more than two and other quantifiers of similar value. (2) "And / or" describes the association relationship of related objects and indicates that three types of relationships may exist. For example, A and / or B may represent three cases: when only A exists, when A and B exist simultaneously, and when only B exists. The symbol " / " generally indicates that the related objects before and after have an "or" relationship.

[0024] The embodiment of the present application improves the HARQ feedback mechanism in the NR V2X system based on the HARQ feedback mechanism of the Sidelink interface introduced in NR V2X, and can precisely control whether to transmit HARQ feedback on the Sidelink interface, thereby saving Sidelink interface resources while ensuring the transmission delay and reliability of the NR V2X system, reducing the power consumption of the terminal, avoiding the HARQ feedback signal from interfering with the transmission of other terminals due to being too frequent, and reducing the interference of the Sidelink interface.

[0025] In the embodiment of the present application, the terminal is a device having a wireless communication function, and may be located on land (indoor or outdoor, handheld or vehicle-mounted), on water (e.g., ship, etc.), or in the air (e.g., airplane, hot air balloon, satellite, etc.). The terminal may be a mobile phone, a tablet, a computer with wireless transmission and reception function, a virtual reality (VR) terminal, an augmented reality (AR) terminal, a wireless terminal in industrial control, a wireless terminal in self driving, a wireless terminal in remote medical, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc., and may also be various types of UE, mobile station (MS), terminal device. The UE in FIG. 1A is one specific example of the terminal of the present application.

[0026] In the embodiment of the present application, the "deployment node" or "node" is a node, which may be a base station, a device for deploying terminal-to-terminal sidelink interface resources, including but not limited to a general base station, a relay node relay, a central unit (CU) of a baseband unit, a distributed unit (DU) of a baseband unit, a gNB in ​​5G, a radio network controller (RNC), a node B (NB), a base station controller (BSC), a base transceiver station (BTS), a home base station (e.g., home evolved node B or home node B, HNB), a baseband unit (BBU), a transmitting and receiving point (TRP), a transmitting point (TP), a mobile switching center, etc. The base station in the present application may also be a third party terminal for scheduling terminal-to-terminal sidelink interface resource transmission in the future.

[0027] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be described in more detail below with reference to the drawings. Of course, the described embodiments are only some of the embodiments, not all of the embodiments. Based on the embodiments in the present application, those skilled in the art can obtain all other embodiments without making any effort that is inventive, and all of the other embodiments fall within the scope of protection of the present application.

[0028] EMBODIMENT 1 The method and device for arranging HARQ feedback between terminal nodes provided by the embodiments of the present application are based on a HARQ feedback mechanism of a sidelink interface. The HARQ feedback mechanism is a feedback mechanism in which, when the receiving side fails to decode, the receiving side stores the received data and requests the sending side to retransmit the data, and the receiving side combines the retransmitted data with the previously received data and then decodes it again, thereby reducing the number of retransmissions through diversity gain and further reducing delay.

[0029] The embodiment of the present application instructs a terminal on a HARQ feedback activation rule configured by a configuration node based on a typical communication mode of an NR V2X system, where the communication mode is direct communication between devices, and the resource allocation modes of the direct communication include the following two types: 1. Resource allocation mode by network side scheduling The network side device allocates direct communication link resources to the terminal on the Uu interface based on a sidelink buffer notification (BSR, Buffer state reporting) notified from the terminal. This resource allocation mode is called NR V2X mode 1 in NR V2X. 2. Allocation mode by autonomous resource selection on the terminal side The terminal autonomously selects resources from a transmission resource pool that is pre-configured for the terminal or broadcast by a network side device, and transmits a direct communication link. This resource allocation mode is called NR V2X mode 2 in NR V2X.

[0030] The resource allocation method of direct communication in the NR V2X system is applied in the embodiment of the present application, and the network side scheduling is the resource allocation mode instructed by the deployment node proposed in the present application.

[0031] The above-mentioned direct communication devices may all be present or not present, and some of the devices may be present and some of the devices may not be present. The present means that the devices participating in the direct communication are located within a 3GPP direct communication carrier coverage, and the present devices can search for a 3GPP base station and can be controlled by the 3GPP base station as necessary, and the not present means that the devices participating in the direct communication are not located within a 3GPP direct communication carrier coverage.

[0032] The method for configuring HARQ feedback between terminal nodes provided by the embodiments of the present application is a method in which a terminal checks an HARQ feedback configuration after a network side device, for example, a base station, instructs the HARQ feedback configuration. In order to fully describe the method provided by the embodiments from a system aspect, a system in which a base station instructs an HARQ feedback configuration and a terminal checks the HARQ feedback configuration will be specifically described as an example. The system includes a base station 200 and a terminal 201, As shown in FIG. 2A, the base station 200 includes: Used to configure a HARQ feedback activation rule of a sidelink interface in a terminal; is used to instruct the terminal of a HARQ feedback activation rule of the configured sidelink interface; The terminal 201 is For receiving a HARQ feedback activation rule of a sidelink interface of a configuration indicated by the configuration node; It is used to determine whether to activate HARQ feedback in the sidelink interface according to the HARQ feedback activation rule of the configured sidelink interface.

[0033] In implementation, the base station may be a general base station or a relay node or a CU or a unit DU of a base station means or a third party terminal for scheduling Sidelink transmission between terminals.

[0034] The base station configures a HARQ feedback activation rule of a sidelink interface for the terminal, and the terminal determines whether to activate HARQ feedback in sidelink interface transmission according to the HARQ feedback activation rule of the sidelink interface configured by the configuration node.

[0035] In implementation, the instruction manner of the base station to instruct the terminal about the HARQ feedback activation rule of the configured sidelink interface includes any one of the following, and at the same time, the manner of the terminal to determine the HARQ feedback activation rule of the configured sidelink interface according to the instruction of the base station is as follows:

[0036] Method 1 The base station uses a broadcast message to configure a sidelink interface resource to the terminal, and instructs the terminal of a HARQ feedback activation rule of the configured sidelink interface.

[0037] The terminal receives a broadcast message in which the base station configures a sidelink interface resource for the terminal, and determines a HARQ feedback activation rule for the sidelink interface of the indicated configuration.

[0038] As an optional embodiment, the HARQ feedback activation rule of the configured sidelink interface is a HARQ feedback activation rule of the sidelink interface used when the terminal uses the configured sidelink interface resource.

[0039] The transmission method of configuring the HARQ feedback activation rule in the above method 1 is applied to the resource allocation mode instructed by the base station, that is, NR V2X mode1, and the allocation mode by terminal-side resource autonomous selection, NR V2X mode2.

[0040] Method 2 A base station configures a sidelink interface resource for the terminal, and instructs the terminal of a HARQ feedback activation rule of the configured sidelink interface through dedicated radio resource control (RRC) signaling.

[0041] The terminal receives dedicated RRC signaling of sidelink interface resources configured by a base station, and determines a HARQ feedback activation rule of the indicated configured sidelink interface.

[0042] In an optional embodiment, the base station sends a physical downlink control channel (PDCCH) deactivation command to the terminal, to instruct the terminal not to activate the configured HARQ feedback activation rule. In response, the terminal receives the PDCCH deactivation command sent from the base station and determines not to activate the configured HARQ feedback activation rule.

[0043] Alternatively, the base station sends a PDCCH activation command to the terminal to instruct the terminal to activate the configured HARQ feedback activation rule. In response, the terminal receives the PDCCH activation command sent from the base station and determines to activate the configured HARQ feedback activation rule.

[0044] Specifically, when the base station allocates the dedicated RRC signaling of the sidelink interface resources to the terminal, the base station configures a HARQ feedback activation rule of the sidelink interface. The HARQ feedback activation rule of the sidelink interface is not configured by the dedicated RRC signaling and takes effect immediately. Instead, the base station sends a PDCCH activation command to the terminal in the Uu interface, which activates the configured HARQ feedback activation rule, and the base station may further send a PDCCH deactivation command to the terminal, which does not activate the configured HARQ feedback activation rule. In this regard, a default state of HARQ feedback activation may be preset, and the default state may be a state in which the sidelink interface sends HARQ feedback or does not send HARQ feedback. This default state may be specified by a protocol, or an initial default state is determined in the RRC configuration signaling.

[0045] The transmission method of configuring the HARQ feedback activation rule in the above method 2 is applied to the resource allocation mode indicated by the base station, that is, NR V2X mode1.

[0046] Method 3 The base station instructs the terminal of a HARQ feedback activation rule of the configured sidelink interface by a medium access control element (MAC CE) configured for the terminal.

[0047] The terminal determines a HARQ feedback activation rule of a sidelink interface of a configuration instructed by a MAC CE configured by a base station.

[0048] Specifically, the base station may select any one of the following MAC CE configuration methods for the step of configuring a MAC CE for the terminal and instructing the terminal of a HARQ feedback activation rule of the configured sidelink interface: (1) By configuring an LCID value in a subheader of a MAC CE configured for a terminal, a HARQ feedback activation rule of the configured sidelink interface is indicated to the terminal. In response, the terminal determines the HARQ feedback activation rule of the sidelink interface of the indicated configuration according to the LCID value in the subheader of the MAC CE configured by the base station. (2) The base station instructs the terminal of a HARQ feedback activation rule of the configured sidelink interface by means of designated content in a MAC CE configured for the terminal. In response, the terminal determines a HARQ feedback activation rule of the sidelink interface of the indicated configuration according to the designated content in the MAC CE configured by the base station.

[0049] As an alternative embodiment, the LCID value in the subheader of the MAC CE configured for the terminal is used to indicate that HARQ feedback is not to be initiated using a fixed value, or is used to indicate whether HARQ feedback is to be initiated and whether HARQ feedback is not to be initiated using different indication values, respectively.

[0050] Specifically, a logical channel identifier (LCID) value in a MAC CE subheader configured for a terminal is used to indicate that HARQ feedback is not to be initiated, or two LCID values ​​are specified for a MAC CE configured for the terminal, one of which is used to indicate that the terminal is to initiate HARQ feedback and the other of which is used to indicate that the terminal is not to initiate HARQ feedback.

[0051] In an alternative embodiment, the designated content in the MAC CE to be configured for the terminal includes one or more of the following: (1) A radio bearer identifier of a sidelink interface for whether to activate HARQ feedback; (2) A logical channel identifier (LCID) of the service data of the Sidelink interface regarding whether to activate HARQ feedback; (3) A bitmap that indicates to the corresponding RB whether to activate HARQ feedback; (4) a data quality of service (QoS) threshold for whether to trigger HARQ feedback; Specifically, the QoS threshold may be a 5QI (5G QoS Identifier) ​​parameter, or a delay threshold, or a reliability threshold, or a priority threshold. (5) a physical layer channel quality threshold parameter for whether to trigger HARQ feedback; (6) A physical layer HARQ retransmission count statistical threshold for whether to trigger HARQ feedback.

[0052] The transmission method of configuring the HARQ feedback activation rule in the above method 3 is applied to the resource allocation mode indicated by the base station, i.e., NR V2X mode1.

[0053] Method 4 The base station instructs the terminal of a HARQ feedback activation rule of the configured sidelink interface by a PDCCH command for configuring a sidelink interface resource for the terminal.

[0054] The terminal receives a PDCCH command of a sidelink interface resource configured by a base station, and determines a HARQ feedback activation rule of the indicated configured sidelink interface.

[0055] As an optional embodiment, depending on whether the PDCCH command is a command for dynamic resource scheduling or a command for periodic resource scheduling, specifically, there are two ways to indicate the HARQ feedback activation rule of the sidelink interface: First, if the PDCCH command is a command for dynamically scheduling resources, the HARQ feedback activation rule of the configured sidelink interface is the HARQ feedback activation rule used for the dynamically scheduled sidelink interface resource. Another is, if the PDCCH command is a command for periodically scheduling resources, the HARQ feedback activation rule of the configured sidelink interface is the HARQ feedback activation rule used for the periodically scheduled sidelink interface resources.

[0056] The above transmission method for configuring the HARQ feedback activation rule in method 4 is applied to the resource allocation mode indicated by the base station, i.e., NR V2X mode1.

[0057] The HARQ feedback activation rule of the sidelink interface configured by the base station in the terminal of the sidelink interface includes one or more of the following rules: (1) Whether to activate HARQ feedback for a specified Sidelink interface resource. Specifically, the designated Sidelink interface resource is a designated frequency resource, or a designated bandwidth segment BWP resource, or a designated carrier resource. (2) Whether to activate HARQ feedback for terminals in the specified area Specifically, it may be a zone instruction. (3) Whether to activate HARQ feedback for a specified bearer Specifically, the predetermined bearer may be represented as an RB identity, and for a bearer that does not have high requirements for delay reliability, it can be specified that the HARQ feedback is not to be activated for the bearer. (4) Whether to activate HARQ feedback for a specified logical channel Specifically, when the sidelink interface transmits using repeated transmission duplication, the terminal can specify that the base station not perform HARQ feedback on some logical channels among a plurality of logical channels corresponding to the same bearer. (5) Whether to activate HARQ feedback for a service bearer that satisfies a predetermined service characteristic. Specifically, the predetermined service characteristic refers to one or a combination of a priority parameter, such as PPPP (ProSe Per-Packet Priority) or priority, a delay parameter, a reliability parameter, such as PPPR (ProSe Per-Packet Reliability), and a 5QI or VQI (Vehicle QoS Identifier) ​​indication. (6) Whether to trigger HARQ feedback based on the comparison of the channel quality of the sidelink interface with a predetermined threshold. Specifically, if the terminal measures that the channel quality of the sidelink interface is higher than a predetermined threshold, the terminal does not need to send HARQ feedback. (7) Whether to trigger HARQ feedback based on the number of data retransmissions in a given period on the Sidelink interface Specifically, when the terminal detects that the number of HARQ retransmissions in a certain statistical time period is lower than a predetermined threshold, the terminal will not initiate HARQ feedback, and in response to this mechanism, the base station configures a timer, and after the timer expires, re-initiates HARQ feedback, and at the same time, starts monitoring the number of HARQ retransmissions, whereby the length of the statistical time period may be configured by the base station or may be specified by a protocol, and the maximum length of the timer may be specified by a protocol. (8) Whether to activate HARQ feedback according to the scheduling transmission mechanism of the Sidelink interface. Specifically, when the scheduling transmission mechanism of the sidelink interface is dynamic scheduling, the base station instructs the terminal in the dynamic scheduling command whether to activate HARQ feedback; or when the scheduling transmission mechanism of the sidelink interface is pre-configured resource, the base station instructs the terminal in the scheduling command for activating the pre-configured resource whether the currently activated pre-configured resource activates HARQ feedback.

[0058] In implementation, notification of whether to activate HARQ feedback is sent between terminals on the Sidelink interface as follows:

[0059] The remote terminal on the Sidelink interface is notified as to whether or not to activate HARQ feedback on the Sidelink interface.

[0060] Specifically, the transmitting terminal can receive the HARQ feedback activation rule instructed by the base station, and after determining whether to activate HARQ feedback, can notify the receiving terminal of whether to transmit / not transmit HARQ feedback in the sidelink interface, specifically, can notify by physical layer SCI signaling or RRC signaling of the sidelink interface; alternatively, the receiving terminal can directly receive the HARQ feedback activation rule instructed by the base station, and after determining whether to activate HARQ feedback, can notify the transmitting terminal of whether to transmit / not transmit HARQ feedback later.

[0061] According to the indication manner of the HARQ feedback activation rule arranged by the base station to the terminal and the specific rule of using HARQ feedback activation, the process of the base station indicating the HARQ feedback activation rule in the above system according to the situation and the terminal determining and executing the HARQ feedback activation rule will be described. For clearer description, the terminal is divided into a transmitting terminal and a receiving terminal, the transmitting terminal is the terminal that transmits sidelink interface data, and the receiving terminal is the terminal that transmits sidelink interface HARQ feedback. As shown in Figure 2B, the system includes a base station side 202, a transmitting terminal 203 and a receiving terminal 204.

[0062] Scene 1 The base station instructs the terminal, through a broadcast message for configuring a sidelink interface resource for the terminal, an HARQ feedback activation rule of the configured sidelink interface to the terminal, where the rule is an absolute usage rule.

[0063] Base station side 202 Send sidelink resource allocation information in a broadcast message to configure sidelink interface resources for the terminal, where the resource allocation information may be information for a serving or non-serving terminal, and may be commonly used sidelink interface resources or specific exceptional resources.

[0064] Specifically, when allocating a sidelink interface resource, the base station indicates a HARQ feedback activation rule corresponding to the sidelink interface resource allocated to the terminal, and the HARQ feedback activation rule can be implemented for one or more of the following: Rule 1 Whether to activate HARQ feedback for a designated sidelink interface resource, where the designated sidelink interface resource may be all or a part of the currently configured sidelink interface resources. Rule 2 Whether to activate HARQ feedback for a specified area. Specifically, this is a zone instruction.

[0065] Transmitting terminal 203 A base station receives a sidelink interface resource in a sidelink interface resource broadcast message configured for a transmitting terminal, determines whether the sidelink interface resource configured in the broadcast message activates HARQ feedback, and after determining to transmit sidelink data in the sidelink interface resource that does not activate HARQ feedback, does not receive HARQ feedback.

[0066] Receiving terminal 204 The receiving terminal processes in one of the following ways according to the method for determining sidelink resources. Method 1 The base station receives a sidelink interface resource in the sidelink interface resource broadcast message configured for the receiving terminal, determines the received configured sidelink interface resource, and at the same time, receives a configuration for whether to activate HARQ feedback for the sidelink interface resource. If the base station determines not to activate HARQ feedback, after receiving sidelink data in the sidelink interface resource that does not activate HARQ feedback, the base station does not send HARQ feedback. Method 2 Receive a resource transmission indication sent by a transmitting terminal on a sidelink interface, and at the same time indicate whether HARQ feedback is required for transmission on the resource. After receiving a sidelink transmission on a resource that does not activate HARQ feedback, do not send HARQ feedback.

[0067] Scene 2 The base station uses a broadcast message for configuring a sidelink interface resource for the terminal to instruct the terminal of a HARQ feedback activation rule of the configured sidelink interface, where the rule is a relative usage rule.

[0068] Base station side 202 Send sidelink resource allocation information in a broadcast message to configure sidelink interface resources for the terminal, where the resource allocation information may be for a serving or non-serving terminal, and may be a commonly used sidelink interface resource or a specific exceptional resource.

[0069] Specifically, when allocating a sidelink interface resource, the base station indicates a HARQ feedback activation rule corresponding to the sidelink interface resource allocated to the terminal, and the HARQ feedback activation rule may be implemented for one or more of the following: Rule 1 Whether to activate HARQ feedback for the specified bearer. Rule 2 Whether to activate HARQ feedback for the specified logical channel. Rule 3 Whether to trigger HARQ feedback for a service bearer that satisfies a predetermined service characteristic. Rule 4 Whether to trigger HARQ feedback based on comparing the channel quality of the Sidelink interface with a predefined threshold. Rule 5 Whether to trigger HARQ feedback based on the number of data retransmissions within a given period of the Sidelink interface.

[0070] Transmitting terminal 203 A base station receives a sidelink interface resource in a broadcast message of a sidelink interface resource configured for a transmitting terminal, and determines whether to initiate HARQ feedback in the sidelink interface resource configured in the broadcast message.

[0071] If the HARQ feedback activation rule is one or more of a specified bearer, a specified logical channel, or a service bearer satisfying specified service characteristics, the transmitting terminal has the following two ways when organizing the sidelink interface MAC PDU: a) When the HARQ feedback activation rule of the sidelink interface arranged in the terminal by the base station instructs to activate sidelink HARQ feedback for the above-mentioned specified bearer, the specified logical channel, or the service bearer satisfying the specified service characteristics, if the MAC PDU transmitted by the transmitting terminal includes data of the specified bearer, the specified logical channel, or the service bearer satisfying the specified service characteristics, activate sidelink HARQ feedback. b) When the HARQ feedback activation rule of the sidelink interface arranged in the terminal by the base station instructs not to activate sidelink HARQ feedback for the above-mentioned specified bearer, the specified logical channel, or the service bearer satisfying the specified service characteristics, if the MAC PDU transmitted by the transmitting terminal includes data of the specified bearer, the specified logical channel, or the service bearer satisfying the specified service characteristics, the sidelink HARQ feedback is not activated.

[0072] If the HARQ feedback activation rule is the above rule 4 or rule 5, the transmitting terminal receives the channel quality feedback or HARQ feedback of the sidelink interface transmitted by the receiving terminal, and determines whether to activate the sidelink HARQ feedback in subsequent transmissions based on the comparison between the channel quality of the sidelink interface and a predetermined threshold configured in the base station, or the number of data retransmissions of the sidelink interface within a predetermined period. For example, if the sidelink interface channel quality is higher than the predetermined threshold, or the number of HARQ retransmissions is lower than the predetermined threshold, the HARQ feedback is not activated.

[0073] After determining whether to activate HARQ feedback, the transmitting terminal transmits a resource indication on the sidelink interface to transmit data, and indicates whether to activate HARQ feedback in this transmission in the sidelink interface resource indication command sent to the receiving terminal. If HARQ feedback is not activated, the transmitting terminal does not monitor HARQ feedback after transmission on the sidelink interface.

[0074] Receiving terminal 204 Depending on the method by which the receiving terminal determines the sidelink resources, there are two methods: Method 1 Receive a sidelink interface resource in a sidelink interface resource broadcast message configured by a base station to a receiving terminal, determine the sidelink interface resource of the received configuration, and at the same time, receive a configuration of whether the base station initiates HARQ feedback for the sidelink interface resource. While performing sidelink channel quality measurement and HARQ feedback, count the channel quality situation and the number of HARQ feedbacks, and do not send HARQ feedback when a predetermined sidelink interface channel quality threshold and HARQ retransmission number threshold are reached, and this method does not require instructions from a transmitting terminal. Method 2 Receive a resource transmission indication sent by a transmitting terminal on a sidelink interface, and at the same time indicate whether HARQ feedback is required for transmission on the resource. After receiving a sidelink transmission resource on a resource that does not activate HARQ feedback, do not send HARQ feedback.

[0075] Scene 3 The base station configures dedicated RRC signaling of sidelink interface resources to the terminal, and indicates a HARQ feedback activation rule of the configured sidelink interface to the terminal, where the rule is an absolute usage rule.

[0076] Base station side 202 Send sidelink resource allocation information in dedicated RRC signaling for sidelink interface resources allocated to the terminal, where the resource allocation information may be for a serving or non-serving terminal, and may be commonly used sidelink interface resources or specific exceptional resources.

[0077] Specifically, when allocating a sidelink interface resource, the base station indicates a HARQ feedback activation rule corresponding to the sidelink interface resource allocated to the terminal, and the HARQ feedback activation rule may implement the HARQ feedback activation rule for one or more of the following: Rule 1 Activate or not activate HARQ feedback for designated sidelink interface resources, which may be all or a part of the currently configured sidelink interface resources. Rule 2 For a specified area, HARQ feedback is activated or not activated, specifically, a zone indication.

[0078] As a possible option, instead of the HARQ feedback activation rule taking effect immediately after being configured by dedicated RRC signaling, the base station may send a PDCCH activation command to the terminal on the Uu interface to activate the configured HARQ feedback activation rule, and the base station may further send a PDCCH deactivation command to the terminal to not activate the configured HARQ feedback activation rule, where the default state may be a state of sending HARQ feedback in sidelink or a state of not sending HARQ feedback, which is specified by a protocol or the initial state is determined in RRC configuration signaling.

[0079] As a possible option, the base station may further transmit sidelink interface resources for data reception to the receiving terminal through dedicated RRC signaling, and configure a HARQ activation rule at the same time.

[0080] Transmitting terminal 203 Receive sidelink interface resources in dedicated RRC signaling arranged by a base station to a transmitting terminal, determine whether to activate HARQ feedback in the sidelink interface resources in the dedicated RRC signaling arranged in the broadcast message, and after it is determined to transmit sidelink data in the sidelink interface resources that do not activate HARQ feedback, do not receive HARQ feedback.

[0081] A possible option is to activate or deactivate the configured HARQ feedback activation rule based on the PDCCH activation / deactivation command, and not receive HARQ feedback after sending a sidelink transmission in a sidelink interface resource that does not activate HARQ feedback.

[0082] Receiving terminal 204 According to the manner in which the receiving terminal determines the sidelink resources, the processing method is one of the following: Method 1 Receive a sidelink interface resource in dedicated RRC signaling configured by a base station for a receiving terminal, determine a sidelink interface resource of the received configuration, and at the same time, receive a configuration by the base station on whether to activate HARQ feedback in the sidelink interface resource. If it is determined that HARQ feedback should not be activated, do not send HARQ feedback after receiving sidelink data in the sidelink interface resource that does not activate HARQ feedback. Method 2 Receive a resource transmission indication sent by a transmitting terminal on a sidelink interface, and at the same time indicate whether HARQ feedback is required for transmission on the resource. After receiving a sidelink transmission resource on a resource that does not activate HARQ feedback, do not send HARQ feedback.

[0083] Scene 4 The base station configures dedicated RRC signaling of sidelink interface resources to the terminal, and indicates a HARQ feedback activation rule of the configured sidelink interface to the terminal, where the rule is a relative usage rule.

[0084] Base station side 202 Send sidelink resource configuration information in dedicated RRC signaling of sidelink interface resources configured for the terminal, where the resource configuration information may be for a serving or non-serving terminal, and may be commonly used sidelink interface resources or specific exceptional resources.

[0085] Specifically, when allocating a sidelink interface resource, the base station indicates a HARQ feedback activation rule corresponding to the sidelink interface resource allocated to the terminal, and the HARQ feedback activation rule may implement the HARQ feedback activation rule for one or more of the following: Rule 1 Whether to activate HARQ feedback for the specified bearer. Rule 2 Whether to activate HARQ feedback for the specified logical channel. Rule 3 Whether to trigger HARQ feedback for a service bearer that satisfies a predetermined service characteristic. Rule 4 Whether to trigger HARQ feedback based on comparing the channel quality of the Sidelink interface with a predefined threshold. Rule 5 Whether to trigger HARQ feedback based on the number of data retransmissions within a given period of the Sidelink interface.

[0086] As a possible option, instead of the HARQ feedback activation rule taking effect immediately after being configured by dedicated RRC signaling, the base station may send a PDCCH activation command to the terminal on the Uu interface to activate the configured HARQ feedback activation rule, and the base station may further send a PDCCH deactivation command to the terminal to not activate the configured HARQ feedback activation rule, where the default state may be a state of sending HARQ feedback in sidelink or a state of not sending HARQ feedback, which is specified by a protocol or the initial state is determined in RRC configuration signaling.

[0087] As a possible option, the base station may further transmit sidelink interface resources for data reception to the receiving terminal through dedicated RRC signaling, and configure a HARQ activation rule at the same time.

[0088] Transmitting terminal 203 Receive sidelink interface resources in dedicated RRC signaling configured by the base station to the transmitting terminal, and determine whether to initiate HARQ feedback in the sidelink interface resources configured in the dedicated RRC signaling.

[0089] Possible choices are whether to trigger HARQ feedback in response to a PDCCH activation / deactivation command or not.

[0090] If the HARQ feedback activation rule is for one or more of a specified bearer, a specified logical channel, or a service bearer that satisfies specified service characteristics, the transmitting terminal has the following two ways to organize the sidelink interface MAC PDU: a) When the HARQ feedback activation rule of the sidelink interface arranged in the terminal by the base station instructs to activate sidelink HARQ feedback for the above-mentioned specified bearer, the specified logical channel, or the service bearer satisfying the specified service characteristics, the transmitting terminal activates sidelink HARQ feedback when the MAC PDU to be transmitted includes data of the specified bearer, the specified logical channel, or the service bearer satisfying the specified service characteristics. b) If the HARQ feedback activation rule of the sidelink interface arranged in the terminal by the base station instructs not to activate sidelink HARQ feedback for the above-mentioned specified bearer, the specified logical channel, or the service bearer satisfying the specified service characteristics, the transmitting terminal does not activate sidelink HARQ feedback when the MAC PDU to be transmitted includes data of the specified bearer, the specified logical channel, or the service bearer satisfying the specified service characteristics.

[0091] If the HARQ feedback activation rule is the above rule 4 or rule 5, the transmitting terminal receives the channel quality feedback or HARQ feedback of the sidelink interface sent by the receiving terminal, and determines whether to activate the sidelink HARQ feedback in subsequent transmissions based on the comparison between the channel quality of the sidelink interface and a predetermined threshold set by the base station, or the number of data retransmissions in a predetermined period of the sidelink interface. For example, if the sidelink interface channel quality is higher than the predetermined threshold, or the number of HARQ retransmissions is lower than the predetermined threshold, the HARQ feedback is not activated.

[0092] After determining whether to activate HARQ feedback, the transmitting terminal transmits a resource indication on the sidelink interface to transmit data, and indicates whether to activate HARQ feedback in this transmission in the sidelink interface resource indication command sent to the receiving terminal. If HARQ feedback is not activated, the transmitting terminal does not monitor HARQ feedback after transmission on the sidelink interface.

[0093] Receiving terminal 204 Depending on the method by which the receiving terminal determines the sidelink resources, there are two methods: Method 1 Receive a sidelink interface resource in the dedicated RRC signaling configured by the base station for a receiving terminal, determine to receive the configured sidelink interface resource, and at the same time, receive a configuration from the base station on whether to activate HARQ feedback for the sidelink interface resource. While performing sidelink channel quality measurement and HARQ feedback, count the channel quality situation and the number of HARQ feedbacks, and do not send HARQ feedback when a predetermined sidelink interface channel quality threshold and a predetermined HARQ retransmission number threshold are reached, and this method does not require an instruction from the transmitting terminal. Method 2 Receive a resource transmission indication sent by a transmitting terminal on a sidelink interface, and at the same time indicate whether HARQ feedback is required for transmission on the resource. After receiving a sidelink transmission resource on a resource that does not activate HARQ feedback, do not send HARQ feedback.

[0094] Scene 5 The base station instructs the terminal of a HARQ feedback activation rule of the configured sidelink interface by a medium access control-control element (MAC CE) configured for the terminal.

[0095] Base station side 202 Instruct the terminal whether to activate HARQ feedback on the sidelink interface according to the LCID value in the subheader of the MAC CE configured for the terminal, or A HARQ feedback activation rule of the configured Sidelink interface is instructed to the terminal through a specified content in a MAC CE configured for the terminal.

[0096] The designated content in the MAC CE to be arranged for the terminal includes one or more of the following: (1) Radio bearer identifier of the Sidelink interface for whether to activate HARQ feedback. (2) A logical channel identifier (LCID) of the service data of the Sidelink interface regarding whether to activate HARQ feedback. (3) A bitmap that instructs the corresponding RB whether to activate HARQ feedback. (4) A data quality of service (QoS) threshold for whether to trigger HARQ feedback. Specifically, the QoS threshold may be a 5QI parameter, or a delay threshold, or a reliability threshold, or a priority threshold. (5) A physical layer channel quality threshold parameter for whether to trigger HARQ feedback. (6) A physical layer HARQ retransmission count statistical threshold for whether to trigger HARQ feedback.

[0097] Specifically, the HARQ feedback activation rule of the Sidelink interface instructed by the MAC CE may implement the HARQ feedback activation rule for one or more of the following: Rule 1 Whether to initiate HARQ feedback for the Sidelink interface resources available to the terminal. Specifically, the LCID value in the subheader of the MAC CE configured for the terminal instructs the terminal whether to activate HARQ feedback in all Sidelink interface resources available to the terminal. Rule 2 Whether to activate HARQ feedback for the specified bearer. Specifically, an RB ID may be carried in the MAC CE, and a single 1-bit RB ID may indicate whether or not to activate HARQ feedback, or only an RB ID that activates HARQ feedback may be included in the MAC CE, or only an RB ID that does not activate HARQ feedback may be included in the MAC CE, or a bitmap method may be used in which one bit corresponds to one data radio bearer (DRB) of the sidelink interface, and whether or not HARQ retransmission is activated in the corresponding RB may be represented by 0 or 1. Rule 3 Whether to activate HARQ feedback for the specified logical channel. Specifically, an LCID corresponding to a sidelink logical channel may be carried in the MAC CE, and a single bit may indicate whether or not to activate HARQ retransmission, or the MAC CE may include only an RB ID that activates HARQ feedback, or the MAC CE may include only an RB ID that does not activate HARQ feedback. Rule 4 Whether to trigger HARQ feedback for a service bearer that satisfies a predetermined service characteristic. Specifically, a QoS threshold parameter is carried in the MAC CE, and the QoS threshold is specifically one of the following: 5QI parameter, delay threshold, reliability threshold, and priority threshold. Rule 5 Whether to trigger HARQ feedback based on comparing the channel quality of the Sidelink interface with a predefined threshold. Specifically, a channel quality threshold is carried within the MAC CE, and may be expressed, for example, as a dB value of quantified reference signal received power (RSRP). Rule 6 Whether to trigger HARQ feedback based on the number of data retransmissions within a given period of the Sidelink interface. Specifically, a HARQ retransmission count threshold is carried in the MAC CE.

[0098] Transmitting terminal 203 Receive a HARQ feedback activation rule of the sidelink interface sent by the base station via the MAC CE.

[0099] According to the HARQ feedback activation rule of the sidelink interface, determine whether to activate HARQ feedback of the sidelink.

[0100] A resource indication is transmitted in the sidelink interface, data is transmitted, and in the sidelink interface resource indication command sent to the receiving terminal, it is indicated whether to activate HARQ feedback in this transmission. If HARQ feedback is not activated, HARQ feedback is not monitored after transmission is performed in the sidelink interface.

[0101] Receiving terminal 204 Depending on the method by which the receiving terminal determines the sidelink resources, there are two processing methods: Method 1 When the receiving terminal receives the sidelink interface resource allocated on the base station side, the receiving terminal separately receives the HARQ feedback activation rule via the MAC CE, and determines whether to activate the HARQ feedback based on the received HARQ feedback activation rule of the sidelink interface. Method 2 Receive a resource transmission indication sent by a transmitting terminal on a sidelink interface, in which the resource transmission indication simultaneously indicates whether HARQ feedback is required for transmission on the resource, and after receiving a sidelink transmission on a resource that does not activate HARQ feedback, do not send HARQ feedback.

[0102] Scene 6 A base station uses a PDCCH command to configure a sidelink interface resource for the terminal, and instructs the terminal of a HARQ feedback activation rule for the configured sidelink interface.

[0103] Base station side 202 In a PDCCH command for allocating sidelink interface resources to a terminal, the base station indicates whether to activate HARQ feedback in the allocated resources, and if the PDCCH command indicates a dynamic scheduling command, the dynamic scheduling resource uses the indicated HARQ feedback activation rule. If the PDCCH command indicates a periodic configuration transmission configured grant, the periodic transmission resource activates the HARQ feedback activation rule indicated by the PDCCH.

[0104] Transmitting terminal 203 Receive the sidelink interface resource allocation made by the base station through the PDCCH command of the sidelink interface resource, and activate or not activate HARQ feedback according to the HARQ feedback activation rule indicated in the PDCCH command.

[0105] A resource indication is transmitted and data is transmitted through the sidelink interface, and the sidelink interface resource indication command sent to the receiving terminal indicates whether to activate HARQ feedback in this transmission. If HARQ feedback is not activated, HARQ feedback is not monitored after transmission is performed through the sidelink interface.

[0106] Receiving terminal 204 Method 1 The PDCCH command transmitted by the base station for allocating resources for the sidelink is monitored, data is received in the sidelink receiving resources indicated by the PDCCH command, and whether or not to initiate HARQ feedback is determined based on an instruction in the PDCCH command as to whether or not to initiate HARQ feedback in the allocated resources. Method 2 Receive a resource transmission indication sent by a transmitting terminal on a sidelink interface, where the resource transmission indication simultaneously indicates whether HARQ feedback is required for transmission on the resource, and if HARQ feedback is not activated, then no HARQ feedback is sent after receiving the transmission on the sidelink interface.

[0107] As shown in FIG. 2C, the specific method steps of the above system are as follows:

[0108] Step 205 The base station configures a HARQ feedback activation rule of a direct communication link Sidelink interface for the transmitting terminal, and instructs the transmitting terminal on the configured HARQ feedback activation rule of the Sidelink interface; or Alternatively, the base station configures a HARQ feedback activation rule of a direct communication link Sidelink interface for a receiving terminal, and instructs the receiving terminal of the configured HARQ feedback activation rule of the Sidelink interface.

[0109] Step 206 The transmitting terminal receives a HARQ feedback activation rule of a configured sidelink interface instructed by the base station, and determines whether to activate HARQ feedback in the sidelink interface according to the HARQ feedback activation rule of the configured sidelink interface; Alternatively, the receiving terminal receives a HARQ feedback activation rule of a configured sidelink interface instructed by the base station, and determines whether to activate HARQ feedback in the sidelink interface based on the HARQ feedback activation rule of the configured sidelink interface.

[0110] Step 207 The transmitting terminal decides whether to activate HARQ feedback on the sidelink interface and notifies the receiving terminal on the sidelink interface.

[0111] EMBODIMENT 2 As shown in FIG. 3 , a device for configuring HARQ feedback between terminal nodes according to an embodiment of the present application includes: a processor 300 , a memory 301 and a transceiver 302 .

[0112] The processor 300 manages the bus architecture and normal processing, and the memory 301 can store data used when the processor 300 operates. The transceiver 302 is used to transmit and receive data under the control of the processor 300.

[0113] The bus architecture may include any number of interconnected buses and bridges, and may specifically connect various circuits, such as one or more processors, represented by processor 300, and memory, represented by memory 301. The bus architecture may also connect various other circuits, such as peripherals, regulators, and power management circuits, all of which are well known in the art and will not be described further herein. The bus interface provides an interface. Processor 300 manages the bus architecture and normal processing, and memory 301 may store data used by processor 300 when it operates.

[0114] The process shown in the embodiments of the present application can be applied to or realized by the processor 300. In the realization process, each step of the signal processing process can be completed by a hardware integrated logic circuit or a command in the form of software in the processor 300. The processor 300 may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and can realize or execute various methods, steps, and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor may be a microprocessor or any general processor, etc. The steps of the methods disclosed with reference to the embodiments of the present application can be directly executed and completed by a hardware processor, or can be executed and completed by a combination of hardware and software modules in the processor. The software modules may be arranged in a storage medium mature in this technical field, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an electrically erasable programmable memory, or a register. The storage medium is located in memory 301, and processor 300 reads the information in memory 301 and completes the steps of the signal processing process in combination with its hardware.

[0115] Wherein, the processor 300 is used to read the program in the memory 301 and execute the following processes.

[0116] As a possible option, the processor 300 may specifically: Configuring a HARQ feedback activation rule for a sidelink interface in the terminal; and instructing the terminal of a HARQ feedback activation rule of the configured sidelink interface, so as to cause the terminal to determine whether to activate HARQ feedback in the sidelink interface based on the HARQ feedback activation rule of the configured sidelink interface.

[0117] In an alternative embodiment, the processor further comprises: and instructing the terminal of a HARQ feedback activation rule of the configured sidelink interface by a broadcast message for configuring a sidelink interface resource to the terminal.

[0118] In an alternative embodiment, the processor further comprises: and instructing the terminal of a HARQ feedback activation rule of the configured sidelink interface by dedicated radio resource control (RRC) signaling to configure a sidelink interface resource for the terminal.

[0119] In an alternative embodiment, the processor further comprises: sending a Physical Downlink Control Channel (PDCCH) deactivation command to the terminal to instruct the terminal not to activate the configured HARQ feedback activation rule; or The method is used to perform the step of: sending a PDCCH activation command to the terminal, to instruct the terminal to activate the configured HARQ feedback activation rule.

[0120] In an alternative embodiment, the processor further comprises: The method is used to execute a step of instructing the terminal, by a medium access control-control element (MAC CE) configured for the terminal, of a HARQ feedback activation rule of the configured sidelink interface.

[0121] In an alternative embodiment, the processor further comprises: Instructing the terminal whether to activate HARQ feedback on the sidelink interface according to an LCID value in a subheader of a MAC CE configured for the terminal; or It is used to perform a step of instructing the terminal of a HARQ feedback activation rule of the configured Sidelink interface according to specified content in a MAC CE configured for the terminal.

[0122] In an alternative embodiment, the designated content in the MAC CE to be configured for the terminal is: A radio bearer identifier of the Sidelink interface for which HARQ feedback should be activated, or A logical channel identifier (LCID) of the service data of the Sidelink interface for whether to activate HARQ feedback, or A bitmap indicating to the corresponding RB whether to activate HARQ feedback, or A data quality of service (QoS) threshold for whether to trigger HARQ feedback, or A physical layer channel quality threshold parameter for whether to trigger HARQ feedback; or A physical layer HARQ retransmission count statistical threshold for whether to trigger HARQ feedback; Includes.

[0123] In an alternative embodiment, the processor further comprises: and instructing the terminal, via a PDCCH command for configuring a sidelink interface resource in the terminal, an HARQ feedback activation rule of the configured sidelink interface.

[0124] As an optional embodiment, when the PDCCH command is a command for dynamically scheduling resources, the HARQ feedback activation rule of the configured sidelink interface is a HARQ feedback activation rule of a sidelink interface used by a sidelink interface resource to be dynamically scheduled this time; If the PDCCH command is a command for periodically scheduling resources, the HARQ feedback activation rule of the configured sidelink interface is a HARQ feedback activation rule of the sidelink interface used by the periodically scheduled sidelink interface resource.

[0125] As an optional embodiment, the HARQ feedback activation rule of the Sidelink interface configured in the terminal of the Sidelink interface includes any one or more of the following rules: Whether to initiate HARQ feedback for the specified Sidelink interface resource. Whether to activate HARQ feedback for terminals in the specified area. Whether to activate HARQ feedback for the specified bearer. Whether to activate HARQ feedback for the specified logical channel. Whether to trigger HARQ feedback for a service bearer that satisfies a predetermined service characteristic. Whether to trigger HARQ feedback based on comparing the channel quality of the Sidelink interface with a predefined threshold. Whether to trigger HARQ feedback based on the number of data retransmissions within a given period of the Sidelink interface. Whether to trigger HARQ feedback according to the scheduling transmission mechanism of the Sidelink interface.

[0126] As an optional embodiment, the designated Sidelink interface resource is a designated frequency resource, or a designated bandwidth fraction (BWP) resource, or a designated carrier resource.

[0127] As an optional embodiment, the device is used by a base station or a relay node or a base station means aggregation unit (CU) or unit distributed unit (DU) or a third party terminal for scheduling sidelink transmission between terminals to configure HARQ feedback activation rules of a sidelink interface for the terminal.

[0128] EMBODIMENT 3 As shown in FIG. 4 , a terminal for checking a HARQ feedback configuration according to an embodiment of the present application includes a processor 400, a memory 401 and a transceiver 402.

[0129] The processor 400 manages the bus architecture and general processing, and the memory 401 can store data used by the processor 400 when performing operations. The transceiver 402 is used to transmit and receive data under the control of the processor 400.

[0130] The bus architecture may include any number of interconnected buses and bridges, and may specifically connect various circuits, such as one or more processors, represented by processor 400, and memory, represented by memory 401. The bus architecture may further connect various other circuits, such as peripherals, regulators, power management circuits, etc., all of which are well known in the art and will not be described further herein. The bus interface provides an interface. Processor 400 manages the bus architecture and normal processing, and memory 401 may store data used by processor 400 when performing operations.

[0131] The process shown in the embodiments of the present application can be applied to or realized by the processor 400. In the realization process, each step of the signal processing process can be completed by a hardware integrated logic circuit or a command in the form of software in the processor 400. The processor 400 may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and can realize or execute various methods, steps, and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor may be a microprocessor or any general processor, etc. The steps of the methods disclosed with reference to the embodiments of the present application can be directly executed and completed by a hardware processor, or can be executed and completed using a combination of hardware and software modules in the processor. The software modules may be arranged in a storage medium mature in this technical field, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an electrically erasable programmable memory, or a register. The storage medium is located in memory 401, and processor 400 reads the information in memory 401 and combines with its hardware to complete the steps of the signal processing process.

[0132] Wherein, the processor 400 is used to read the program in the memory 401 and execute the following processes.

[0133] As a possible option, the processor 400 may specifically: receiving a HARQ feedback activation rule of a sidelink interface of the configuration indicated by the configuration node; and determining whether to activate HARQ feedback in the Sidelink interface according to a HARQ feedback activation rule of the configured Sidelink interface.

[0134] In an alternative embodiment, the processor further comprises: The terminal is used to perform a step of determining a HARQ feedback activation rule of the sidelink interface of the indicated configuration by receiving a broadcast message sent from a configuration node to configure a sidelink interface resource to the terminal.

[0135] As an optional embodiment, the HARQ feedback activation rule of the configured sidelink interface is a HARQ feedback activation rule of the sidelink interface used when the terminal uses the configured sidelink interface resource.

[0136] In an alternative embodiment, the processor further comprises: The configuration node is used to perform a step of determining a HARQ feedback activation rule of the sidelink interface of the indicated configuration by receiving dedicated RRC signaling of the sidelink interface resources configured by the configuration node.

[0137] In an alternative embodiment, the processor further comprises: receiving a PDCCH deactivation command sent from the configuration node and determining not to activate the configured HARQ feedback activation rule; or The PDCCH activation command is used to perform the step of receiving a PDCCH activation command sent from a configuration node and determining to activate a configured HARQ feedback activation rule.

[0138] In an alternative embodiment, the processor further comprises: It is used to perform the step of determining, by a MAC CE configured by the configuration node, a HARQ feedback activation rule of a sidelink interface of the indicated configuration.

[0139] In an alternative embodiment, the processor further comprises: determining a HARQ feedback activation rule of a sidelink interface of the indicated configuration according to a specific indication bit in a subheader of the MAC CE configured by the configuration node; or It is used to perform the step of determining a HARQ feedback activation rule of the Sidelink interface of the indicated configuration according to the designated content in the MAC CE configured by the configuration node.

[0140] As an alternative embodiment, a specific indication bit in the sub-header of the received MAC CE configured by the configuration node is used to indicate not to activate HARQ feedback using a fixed value, or different indication values ​​are used to indicate respectively to activate HARQ feedback and not to activate HARQ feedback.

[0141] In an alternative embodiment, the designated content in the MAC CE arranged by the arrangement node is: A radio bearer identifier of the Sidelink interface for which HARQ feedback should be activated, or LCID of the service data of the Sidelink interface regarding whether to activate HARQ feedback; or a bitmap file bitmap instructing the corresponding RB whether to activate HARQ feedback or not, or A data QoS threshold for whether to trigger HARQ feedback, or A physical layer channel quality threshold parameter for whether to trigger HARQ feedback; or A physical layer HARQ retransmission count statistical threshold for whether to trigger HARQ feedback; Includes.

[0142] In an optional embodiment, the step of receiving a HARQ feedback activation rule of a sidelink interface of the configuration indicated by the configuration node includes: The method includes receiving a PDCCH command of a sidelink interface resource configured by a configuration node, thereby determining a HARQ feedback activation rule of the sidelink interface of the indicated configuration.

[0143] As an optional embodiment, when the PDCCH command is a command for dynamically scheduling resources, the HARQ feedback activation rule of the configured sidelink interface is a HARQ feedback activation rule of a sidelink interface used by a sidelink interface resource to be dynamically scheduled this time; If the PDCCH command is a command for periodically scheduling resources, the HARQ feedback activation rule of the configured sidelink interface is a HARQ feedback activation rule of the sidelink interface used by the periodically scheduled sidelink interface resource.

[0144] As an optional embodiment, the HARQ feedback activation rule of the configured Sidelink interface includes any one or more of the following rules: Whether to initiate HARQ feedback for the specified Sidelink interface resource. Whether to activate HARQ feedback for terminals in the specified area. Whether to activate HARQ feedback for the specified bearer. Whether to activate HARQ feedback for the specified logical channel. Whether to trigger HARQ feedback for a service bearer that satisfies a predetermined service characteristic. Whether to trigger HARQ feedback based on comparing the channel quality of the Sidelink interface with a predefined threshold. Whether to trigger HARQ feedback based on the number of data retransmissions within a given period of the Sidelink interface. Whether to trigger HARQ feedback according to the scheduling transmission mechanism of the Sidelink interface.

[0145] As an optional embodiment, the designated Sidelink interface resource is a designated frequency resource, or a designated bandwidth fraction (BWP) resource, or a designated carrier resource.

[0146] As an alternative embodiment, the deployment node is a base station or a relay node or a CU or a unit DU of a base station means or a third party terminal for scheduling Sidelink transmissions between terminals.

[0147] As an optional embodiment, after determining whether the terminal activates HARQ feedback on the sidelink interface according to the configured sidelink interface HARQ feedback activation rule, the processor: It is used to perform a step of notifying a counterpart terminal on the sidelink interface of whether to activate HARQ feedback on the sidelink interface.

[0148] As shown in FIG. 5, the embodiment of the present application, the device for configuring HARQ feedback between terminal nodes, A configuration module 500 for configuring a HARQ feedback activation rule of a direct communication link (Sidelink) interface in a terminal; An instruction module 501 for instructing the terminal of a HARQ feedback activation rule of the configured sidelink interface, so as to allow the terminal to determine whether to activate HARQ feedback in a sidelink interface according to a HARQ feedback activation rule of the configured sidelink interface; Includes.

[0149] In an alternative embodiment, the instruction module 501: It is used to instruct the terminal of the HARQ feedback activation rule of the configured Sidelink interface by a broadcast message that configures Sidelink interface resources to the terminal.

[0150] In an alternative embodiment, the instruction module 501: It is used to instruct the terminal of the HARQ feedback activation rule of the configured sidelink interface by dedicated radio resource control (RRC) signaling for configuring sidelink interface resources in the terminal.

[0151] As an optional embodiment, sending a Physical Downlink Control Channel (PDCCH) deactivation command to the terminal to instruct the terminal not to activate the configured HARQ feedback activation rule; or sending a PDCCH activation command to the terminal, to instruct the terminal to activate a configured HARQ feedback activation rule; Includes.

[0152] In an alternative embodiment, the instruction module 501: It is used by a medium access control-control element (MAC CE) configured for the terminal to instruct the terminal of the HARQ feedback activation rule of the configured sidelink interface.

[0153] In an alternative embodiment, the instruction module 501 specifically: Instruct the terminal whether to activate HARQ feedback on the sidelink interface according to the LCID value in the subheader of the MAC CE configured for the terminal, or It is used to instruct the terminal of the HARQ feedback activation rule of the configured Sidelink interface according to the specified content in the MAC CE configured for the terminal.

[0154] In an alternative embodiment, the designated content in the MAC CE to be configured for the terminal is: A radio bearer identifier of the Sidelink interface for which HARQ feedback should be activated, or A logical channel identifier (LCID) of the service data of the Sidelink interface for whether to activate HARQ feedback, or A bitmap indicating to the corresponding RB whether to activate HARQ feedback, or A data quality of service (QoS) threshold for whether to trigger HARQ feedback, or A physical layer channel quality threshold parameter for whether to trigger HARQ feedback; or A physical layer HARQ retransmission count statistical threshold for whether to trigger HARQ feedback; Includes.

[0155] In an alternative embodiment, the instruction module 501: It is used to instruct the terminal, via a PDCCH command for configuring a sidelink interface resource in the terminal, the terminal to use a HARQ feedback activation rule for the configured sidelink interface.

[0156] In an alternative embodiment, the instruction module 501 specifically: If the PDCCH command is a command for dynamically scheduling resources, the HARQ feedback activation rule of the configured sidelink interface is a HARQ feedback activation rule of the sidelink interface used by the sidelink interface resource to be dynamically scheduled this time; If the PDCCH command is a command for periodically scheduling resources, the HARQ feedback activation rule of the configured sidelink interface is a HARQ feedback activation rule of the sidelink interface used by the periodically scheduled sidelink interface resource.

[0157] As an optional embodiment, the HARQ feedback activation rule of the Sidelink interface configured in the terminal of the Sidelink interface includes any one or more of the following rules: Whether to initiate HARQ feedback for the specified Sidelink interface resource. Whether to activate HARQ feedback for terminals in the specified area. Whether to activate HARQ feedback for the specified bearer. Whether to activate HARQ feedback for the specified logical channel. Whether to trigger HARQ feedback for a service bearer that satisfies a predetermined service characteristic. Whether to trigger HARQ feedback based on comparing the channel quality of the Sidelink interface with a predefined threshold. Whether to trigger HARQ feedback based on the number of data retransmissions within a given period of the Sidelink interface. Whether to trigger HARQ feedback according to the scheduling transmission mechanism of the Sidelink interface.

[0158] As an optional embodiment, the designated Sidelink interface resource is a designated frequency resource, or a designated bandwidth fraction (BWP) resource, or a designated carrier resource.

[0159] As an optional embodiment, the method is applied to a base station or a relay node or a aggregation unit (CU) or a distributed unit (DU) of a base station means or a third party terminal for scheduling sidelink transmission between terminals to configure a HARQ feedback activation rule of a sidelink interface to the terminal.

[0160] As shown in FIG. 6, according to an embodiment of the present application, a terminal that checks the HARQ feedback configuration includes: A receiving module 600 for receiving a HARQ feedback activation rule of a sidelink interface of a configuration indicated by a configuration node; A determination module 601 for determining whether to activate HARQ feedback in a sidelink interface according to the HARQ feedback activation rule of the configured sidelink interface; Includes.

[0161] In an alternative embodiment, the receiving module 600 comprises: It is used to determine the HARQ feedback activation rule of the sidelink interface of the indicated configuration by receiving a broadcast message sent from a configuration node to configure the sidelink interface resource to the terminal.

[0162] As an optional embodiment, the HARQ feedback activation rule of the configured sidelink interface is a HARQ feedback activation rule of the sidelink interface used when the terminal uses the configured sidelink interface resource.

[0163] In an alternative embodiment, the receiving module 600 comprises: It is used to determine the HARQ feedback activation rule of the sidelink interface of the indicated configuration by receiving the dedicated RRC signaling of the sidelink interface resource configured by the configuration node.

[0164] In an alternative embodiment, the receiving module 600 specifically comprises: When receiving a PDCCH deactivation command sent from the configuration node, determine not to activate the configured HARQ feedback activation rule, or It is used to determine to activate the configured HARQ feedback activation rule when a PDCCH activation command sent from the configuration node is received.

[0165] In an alternative embodiment, the receiving module 600 comprises: It is used by the MAC CE configured by the configuration node to determine the HARQ feedback activation rule of the sidelink interface of the indicated configuration.

[0166] In an alternative embodiment, the receiving module 600 specifically comprises: Determine the HARQ feedback activation rule of the sidelink interface of the indicated configuration according to a specific indication bit in the subheader of the MAC CE configured by the configuration node; or It is used to determine the HARQ feedback activation rule of the Sidelink interface of the indicated configuration according to the designated content in the MAC CE configured by the configuration node.

[0167] As an alternative embodiment, a specific indication bit in the sub-header of the received MAC CE configured by the configuration node is used to indicate not to activate HARQ feedback using a fixed value, or different indication values ​​are used to indicate respectively to activate HARQ feedback and not to activate HARQ feedback.

[0168] In an alternative embodiment, the designated content in the MAC CE arranged by the arrangement node is: A radio bearer identifier of the Sidelink interface for which HARQ feedback should be activated, or LCID of the service data of the Sidelink interface regarding whether to activate HARQ feedback; or a bitmap file bitmap instructing the corresponding RB whether to activate HARQ feedback or not, or A data QoS threshold for whether to trigger HARQ feedback, or A physical layer channel quality threshold parameter for whether to trigger HARQ feedback; or A physical layer HARQ retransmission count statistical threshold for whether to trigger HARQ feedback; Includes.

[0169] In an alternative embodiment, the receiving module 600 comprises: It is used to determine the HARQ feedback activation rule of the sidelink interface of the indicated configuration by receiving the PDCCH command of the sidelink interface resource configured by the configuration node.

[0170] As an optional embodiment, when the PDCCH command is a command for dynamically scheduling resources, the HARQ feedback activation rule of the configured sidelink interface is a HARQ feedback activation rule of a sidelink interface used by a sidelink interface resource to be dynamically scheduled this time; If the PDCCH command is a command for periodically scheduling resources, the HARQ feedback activation rule of the configured sidelink interface is a HARQ feedback activation rule of the sidelink interface used by the periodically scheduled sidelink interface resource.

[0171] As an optional embodiment, the HARQ feedback activation rule of the configured Sidelink interface includes any one or more of the following rules: Whether to initiate HARQ feedback for the specified Sidelink interface resource. Whether to activate HARQ feedback for terminals in the specified area. Whether to activate HARQ feedback for the specified bearer. Whether to activate HARQ feedback for the specified logical channel. Whether to trigger HARQ feedback for a service bearer that satisfies a predetermined service characteristic. Whether to trigger HARQ feedback based on comparing the channel quality of the Sidelink interface with a predefined threshold. Whether to trigger HARQ feedback based on the number of data retransmissions within a given period of the Sidelink interface. Whether to trigger HARQ feedback according to the scheduling transmission mechanism of the Sidelink interface.

[0172] As an optional embodiment, the designated Sidelink interface resource is a designated frequency resource, or a designated bandwidth fraction (BWP) resource, or a designated carrier resource.

[0173] As an alternative embodiment, the deployment node is a base station or a relay node or a CU or a unit DU of a base station means or a third party terminal for scheduling Sidelink transmissions between terminals.

[0174] As an optional embodiment, after determining whether the terminal activates HARQ feedback on the sidelink interface according to the configured sidelink interface HARQ feedback activation rule, the terminal further comprises: It is used to notify the peer terminal on the sidelink interface whether to activate HARQ feedback on the sidelink interface.

[0175] An embodiment of the present application provides a readable storage medium, the readable storage medium being a non-volatile storage medium, the readable storage medium comprising a program code, the program code being used to cause the computing device to perform steps of a method for arranging HARQ feedback between terminal nodes, when the program code is executed in a computing device.

[0176] An embodiment of the present application provides a readable storage medium, the readable storage medium being a non-volatile storage medium, the readable storage medium including a program code, the program code being used to cause the computing device to perform steps described in a method for the terminal to check a HARQ feedback configuration, when the program code is executed in a computing device.

[0177] An embodiment of the present application provides a computer program product including commands, which when executed in a computer, are used to cause the computing device to perform the steps of the method for configuring HARQ feedback between terminal nodes.

[0178] An embodiment of the present application provides a computer program product including commands, which, when executed in a computer, are used to cause the computing device to perform the steps described in the method for the terminal to check a HARQ feedback configuration.

[0179] Based on the same inventive concept, an embodiment of the present application further provides a method for configuring HARQ feedback between terminal nodes, and the device corresponding to the method is a network side device, i.e., a base station, in a system in which a base station described in the embodiment of the present application instructs HARQ feedback configuration and a terminal confirms the HARQ feedback configuration. In addition, the principle of the method for solving the problem is similar to that of the device, so the implementation of the method may refer to the implementation of the system, and is omitted here.

[0180] As shown in FIG. 7, the method for configuring HARQ feedback between terminal nodes provided by the embodiment of the present application includes: Step 701 of configuring a HARQ feedback activation rule of a direct communication link (Sidelink) interface in a terminal; In step 702, a HARQ feedback activation rule of the configured sidelink interface is instructed to the terminal, so that the terminal determines whether to activate HARQ feedback in a sidelink interface according to the HARQ feedback activation rule of the configured sidelink interface; Includes.

[0181] In an optional embodiment, the step of instructing the terminal of a HARQ feedback activation rule of the configured sidelink interface includes: The method includes the step of instructing the terminal of a HARQ feedback activation rule of the configured sidelink interface by a broadcast message for configuring a sidelink interface resource for the terminal.

[0182] In an optional embodiment, the step of instructing the terminal of a HARQ feedback activation rule of the configured sidelink interface includes: The method includes the step of instructing the terminal of a HARQ feedback activation rule of the configured sidelink interface by dedicated radio resource control (RRC) signaling to configure a sidelink interface resource for the terminal.

[0183] As an optional embodiment, sending a Physical Downlink Control Channel (PDCCH) deactivation command to the terminal to instruct the terminal not to activate the configured HARQ feedback activation rule; or sending a PDCCH activation command to the terminal, to instruct the terminal to activate a configured HARQ feedback activation rule; Includes.

[0184] In an optional embodiment, the step of instructing the terminal of a HARQ feedback activation rule of the configured sidelink interface includes: The method includes a step of instructing the terminal, by a medium access control-control element (MAC CE) configured for the terminal, of a HARQ feedback activation rule of the configured sidelink interface.

[0185] In an optional embodiment, the step of instructing the terminal of a HARQ feedback activation rule of the configured sidelink interface by a MAC CE configured for the terminal includes: Instructing the terminal whether to activate HARQ feedback on the sidelink interface according to an LCID value in a subheader of a MAC CE configured for the terminal; or and instructing the terminal of a HARQ feedback activation rule of the configured sidelink interface according to specified content in a MAC CE configured for the terminal.

[0186] In an alternative embodiment, the designated content in the MAC CE to be configured for the terminal is: A radio bearer identifier of the Sidelink interface for which HARQ feedback should be activated, or A logical channel identifier (LCID) of the service data of the Sidelink interface for whether to activate HARQ feedback, or A bitmap indicating to the corresponding RB whether to activate HARQ feedback, or A data quality of service (QoS) threshold for whether to trigger HARQ feedback, or A physical layer channel quality threshold parameter for whether to trigger HARQ feedback; or A physical layer HARQ retransmission count statistical threshold for whether to trigger HARQ feedback; Includes.

[0187] In an optional embodiment, the step of instructing the terminal of a HARQ feedback activation rule of the configured sidelink interface includes: The method includes instructing the terminal, via a PDCCH command for configuring a sidelink interface resource in the terminal, an HARQ feedback activation rule of the configured sidelink interface.

[0188] As an optional embodiment, when the PDCCH command is a command for dynamically scheduling resources, the HARQ feedback activation rule of the configured sidelink interface is a HARQ feedback activation rule of a sidelink interface used by a sidelink interface resource to be dynamically scheduled this time; If the PDCCH command is a command for periodically scheduling resources, the HARQ feedback activation rule of the configured sidelink interface is a HARQ feedback activation rule of the sidelink interface used by the periodically scheduled sidelink interface resource.

[0189] As an optional embodiment, the HARQ feedback activation rule of the Sidelink interface configured in the terminal of the Sidelink interface includes any one or more of the following rules: Whether to initiate HARQ feedback for the specified Sidelink interface resource. Whether to activate HARQ feedback for terminals in the specified area. Whether to activate HARQ feedback for the specified bearer. Whether to activate HARQ feedback for the specified logical channel. Whether to trigger HARQ feedback for a service bearer that satisfies a predetermined service characteristic. Whether to trigger HARQ feedback based on comparing the channel quality of the Sidelink interface with a predefined threshold. Whether to trigger HARQ feedback based on the number of data retransmissions within a given period of the Sidelink interface. Whether to trigger HARQ feedback according to the scheduling transmission mechanism of the Sidelink interface.

[0190] As an optional embodiment, the designated Sidelink interface resource is a designated frequency resource, or a designated bandwidth fraction (BWP) resource, or a designated carrier resource.

[0191] As an optional embodiment, the method is applied to a base station or a relay node or a aggregation unit (CU) or a distributed unit (DU) of a base station means or a third party terminal for scheduling sidelink transmission between terminals to configure a HARQ feedback activation rule of a sidelink interface to the terminal.

[0192] Based on the same inventive concept, an embodiment of the present application further provides a method for a terminal to check a HARQ feedback configuration, and a device corresponding to the method is a terminal in a system in which a base station described in the embodiment of the present application instructs a HARQ feedback configuration and a terminal checks the HARQ feedback configuration. In addition, the principle of the method for solving problems is similar to that of the terminal, so the implementation of the method may refer to the implementation of the system, and is omitted here.

[0193] As shown in FIG. 8, the method for a terminal to check a HARQ feedback configuration provided by an embodiment of the present application includes: Step 801 of receiving a HARQ feedback activation rule of a sidelink interface of a configuration indicated by a configuration node; In step 802, determining whether to activate HARQ feedback in the sidelink interface according to the configured sidelink interface HARQ feedback activation rule; Includes.

[0194] In an optional embodiment, the step of receiving a HARQ feedback activation rule of a sidelink interface of the configuration indicated by the configuration node includes: The method includes receiving a broadcast message, sent from a configuration node, for configuring a sidelink interface resource to the terminal, and determining a HARQ feedback activation rule of the sidelink interface of the indicated configuration.

[0195] As an optional embodiment, the HARQ feedback activation rule of the configured sidelink interface is a HARQ feedback activation rule of the sidelink interface used when the terminal uses the configured sidelink interface resource.

[0196] In an optional embodiment, the step of receiving a HARQ feedback activation rule of a sidelink interface of the configuration indicated by the configuration node includes: The method includes determining a HARQ feedback activation rule of a sidelink interface of the indicated configuration by receiving dedicated RRC signaling of the sidelink interface resources configured by the configuration node.

[0197] As an optional embodiment, determining not to activate the configured HARQ feedback activation rule when receiving a PDCCH deactivation command sent from the configuration node; or determining to activate the configured HARQ feedback activation rule when receiving a PDCCH activation command sent from the configuration node; Includes.

[0198] In an optional embodiment, the step of receiving a HARQ feedback activation rule of a sidelink interface of the configuration indicated by the configuration node includes: The method includes determining a HARQ feedback activation rule of a Sidelink interface of the indicated configuration by receiving a MAC CE configured by the configuration node.

[0199] As an optional embodiment, the step of determining a HARQ feedback activation rule of a sidelink interface of the indicated configuration by receiving a MAC CE configured by a configuration node includes: determining a HARQ feedback activation rule of a Sidelink interface of the indicated configuration by receiving a specific indication bit in a subheader of a MAC CE configured by the configuration node; or determining a HARQ feedback activation rule of a Sidelink interface of the indicated configuration by receiving designated content in a MAC CE configured by the configuration node; Includes.

[0200] As an alternative embodiment, a specific indication bit in the sub-header of the received MAC CE configured by the configuration node is used to indicate not to activate HARQ feedback using a fixed value, or different indication values ​​are used to indicate respectively to activate HARQ feedback and not to activate HARQ feedback.

[0201] In an alternative embodiment, the designated content in the MAC CE arranged by the arrangement node is: A radio bearer identifier of the Sidelink interface for which HARQ feedback should be activated, or LCID of the service data of the Sidelink interface regarding whether to activate HARQ feedback; or a bitmap file bitmap instructing the corresponding RB whether to activate HARQ feedback or not, or A data QoS threshold for whether to trigger HARQ feedback, or A physical layer channel quality threshold parameter for whether to trigger HARQ feedback; or A physical layer HARQ retransmission count statistical threshold for whether to trigger HARQ feedback; Includes.

[0202] In an optional embodiment, the step of receiving a HARQ feedback activation rule of a sidelink interface of the configuration indicated by the configuration node includes: The method includes receiving a PDCCH command of a sidelink interface resource configured by a configuration node, thereby determining a HARQ feedback activation rule of the sidelink interface of the indicated configuration.

[0203] As an optional embodiment, when the PDCCH command is a command for dynamically scheduling resources, the HARQ feedback activation rule of the configured sidelink interface is a HARQ feedback activation rule of a sidelink interface used by a sidelink interface resource to be dynamically scheduled this time; If the PDCCH command is a command for periodically scheduling resources, the HARQ feedback activation rule of the configured sidelink interface is a HARQ feedback activation rule of the sidelink interface used by the periodically scheduled sidelink interface resource.

[0204] As an optional embodiment, the HARQ feedback activation rule of the configured Sidelink interface includes any one or more of the following rules: Whether to initiate HARQ feedback for the specified Sidelink interface resource. Whether to activate HARQ feedback for terminals in the specified area. Whether to activate HARQ feedback for the specified bearer. Whether to activate HARQ feedback for the specified logical channel. Whether to trigger HARQ feedback for a service bearer that satisfies a predetermined service characteristic. Whether to trigger HARQ feedback based on comparing the channel quality of the Sidelink interface with a predefined threshold. Whether to trigger HARQ feedback based on the number of data retransmissions within a given period of the Sidelink interface. Whether to trigger HARQ feedback according to the scheduling transmission mechanism of the Sidelink interface.

[0205] As an optional embodiment, the designated Sidelink interface resource is a designated frequency resource, or a designated bandwidth fraction (BWP) resource, or a designated carrier resource.

[0206] As an alternative embodiment, the deployment node is a base station or a relay node or a CU or a unit DU of a base station means or a third party terminal for scheduling Sidelink transmissions between terminals.

[0207] As an optional embodiment, after determining whether the terminal activates HARQ feedback on the sidelink interface according to the configured HARQ feedback activation rule of the sidelink interface, The method includes the step of notifying a counterpart terminal on the sidelink interface of whether to activate HARQ feedback on the sidelink interface.

[0208] The present invention has been described above by way of flow diagrams and / or block diagrams of the method, apparatus (system) and computer program product of the embodiment of the present invention. It should be understood that each flow and / or block in the flow diagrams and / or block diagrams and the combination of flows and / or blocks in the flow diagrams and / or block diagrams can be realized by computer program instructions. A processor can provide these computer program instructions to a processor of a general purpose computer, a special purpose computer, an embedded processor, or other programmable data processing device, and the processor of the computer or other programmable data processing device executes these computer program instructions to realize the functions specified in one or more flows in the flow diagrams and / or one or more blocks in the block diagrams.

[0209] The present application may also be embodied by software and / or firmware (including firmware, resident software, microcode, etc.). These computer program instructions may also be implemented in a computer or other programmable data processing device. The computer or other programmable device on which the computer program instructions are implemented performs a series of operational steps to implement the relevant process, and the instructions executed on the computer or other programmable device implement the function(s) specified in one or more of the flows in the flow diagrams and / or one or more blocks in the block diagrams.

[0210] Of course, those skilled in the art may modify the technical solutions described in the above embodiments or replace some technical elements therein, and such modifications and replacements shall not be deemed to depart from the technical scope of each embodiment of the present invention. [Explanation of symbols]

[0211] 200 base stations 201 Terminal 202 Base station 203 Sending terminal 204 Receiving terminal 300 processors 301 Memory 302 Transmitter / Receiver 400 processors 401 Memory 402 Transmitter / Receiver 500 Placement Module 501 Instruction Module 600 Receiver Module 601 Decision Module

Claims

1. 1. A method for configuring Hybrid Automatic Repeat Request (HARQ) feedback between terminal nodes, comprising: The base station configures a HARQ feedback activation rule of a direct communication link Sidelink interface in the terminal; The base station instructs the terminal of a HARQ feedback activation rule of the configured Sidelink interface; Including, The step of instructing the terminal of a HARQ feedback activation rule of the configured Sidelink interface includes the step of instructing the terminal of a HARQ feedback activation rule of the configured Sidelink interface by dedicated Radio Resource Control (RRC) signaling for configuring Sidelink interface resources in the terminal; The method, characterized in that the HARQ feedback activation rule of the Sidelink interface configured in a terminal of the Sidelink interface includes whether to activate HARQ feedback for a specified logical channel.

2. The step of instructing the terminal of a HARQ feedback activation rule of the configured Sidelink interface includes: instructing the terminal of a HARQ feedback activation rule of the configured Sidelink interface by a broadcast message for configuring a Sidelink interface resource in the terminal; The method of claim 1 further comprising:

3. Indicating a HARQ feedback activation rule of the configured Sidelink interface to the terminal by dedicated Radio Resource Control (RRC) signaling for configuring a Sidelink interface resource in the terminal, sending a Physical Downlink Control Channel (PDCCH) deactivation command to the terminal to instruct the terminal not to activate the configured HARQ feedback activation rule; or sending a PDCCH activation command to the terminal, to instruct the terminal to activate a configured HARQ feedback activation rule; The method of claim 2 further comprising:

4. The step of instructing the terminal of a HARQ feedback activation rule of the configured Sidelink interface includes: Instructing the terminal of a HARQ feedback activation rule of the configured Sidelink interface by a medium access control-control element (MAC CE) configured for the terminal; Further comprising: The step of instructing the terminal of a HARQ feedback activation rule of the configured Sidelink interface by a MAC CE configured for the terminal, Instructing the terminal whether to activate HARQ feedback of the Sidelink interface according to an LCID value in a subheader of a MAC CE configured for the terminal; or Instructing the terminal of a HARQ feedback activation rule of the configured Sidelink interface according to a specified content in a MAC CE configured for the terminal; Including, The designated content in the MAC CE to be placed on the terminal is A radio bearer (RB) identifier of the Sidelink interface for whether to activate HARQ feedback, or A logical channel identifier (LCID) of the service data of the Sidelink interface for whether to activate HARQ feedback; or A bitmap indicating for the corresponding RB whether to activate HARQ feedback, or A data quality of service (QoS) threshold for whether to trigger HARQ feedback, or A physical layer channel quality threshold parameter for whether to trigger HARQ feedback; or and a physical layer HARQ retransmission count statistical threshold for whether to trigger HARQ feedback.

2. The method according to claim 1 .

5. The HARQ feedback activation rule of the Sidelink interface configured in the terminal of the Sidelink interface is: Whether to activate HARQ feedback for the specified Sidelink interface resource; Whether to activate HARQ feedback for terminals in the specified area; Whether to activate HARQ feedback for the designated bearer; Whether to activate HARQ feedback for a service bearer that satisfies a predetermined service characteristic; Whether to trigger HARQ feedback according to comparing the channel quality of the Sidelink interface with a predetermined threshold; Whether to trigger HARQ feedback based on the number of data retransmissions in a given period of the Sidelink interface; Whether to activate HARQ feedback according to the scheduling transmission mechanism of the Sidelink interface; The method of claim 1 , further comprising one or more rules of:

6. receiving a HARQ feedback activation rule of a configured Sidelink interface indicated by a configuration node via dedicated Radio Resource Control (RRC) signaling for configuring Sidelink interface resources in a terminal; determining whether to activate HARQ feedback in the Sidelink interface according to a HARQ feedback activation rule of the configured Sidelink interface; Including, The method for confirming a hybrid automatic repeat request (HARQ) feedback configuration by a terminal, wherein the HARQ feedback activation rule of the configured Sidelink interface includes whether to activate HARQ feedback for a specified logical channel.

7. A receiving module for receiving a HARQ feedback activation rule of a configured Sidelink interface indicated by a configuration node through a dedicated Radio Resource Control (RRC) signaling for configuring Sidelink interface resources in a terminal; A determination module for determining whether to activate HARQ feedback in a Sidelink interface according to a HARQ feedback activation rule of the configured Sidelink interface; Including, A terminal for checking a hybrid automatic repeat request (HARQ) feedback configuration, wherein the HARQ feedback activation rule of the configured Sidelink interface includes whether to activate HARQ feedback for a specified logical channel.

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