Data transmission method, device, equipment and system for direct communication

Abstract

The present disclosure is a divisional application with application number 201880002711.9. The present disclosure relates to a data transmission method, apparatus, device and system for direct communication, and belongs to the field of communication technology. The method comprises: a first terminal sends direct data to a second terminal through a direct link according to the DCI sent by the access network device; receives direct hybrid automatic repeat request HARQ feedback information fed back by the second terminal, the direct HARQ feedback information is used to indicate the receiving status corresponding to the direct data; and reports the direct HARQ feedback information to the access network device. Through the above-mentioned method, the present disclosure enables, in a direct communication scenario based on access network device scheduling, the direct HARQ feedback information can be first transmitted from the second terminal to the first terminal, and then reported by the first terminal to the access network device, thereby ensuring the success rate of information transmission and reception in the direct communication scenario, and helping to improve the efficiency of data transmission.

Description

[0001] The present disclosure is a divisional application of the Chinese application with application number 201880002711.9, application date December 29, 2018, and invention name “Data transmission method, device, equipment and system for direct communication”. Technical Field

[0002] The present disclosure relates to the field of communication technology, and in particular to a data transmission method, device, equipment and system for direct communication. Background Art

[0003] In vehicle to everything (V2X) technology, vehicle-mounted devices can communicate directly with other devices (such as other vehicle-mounted devices, roadside infrastructure, etc.) through sidelinks. Direct communication has the characteristics of short latency and low overhead.

[0004] In the related technology, the direct communication method based on access network device scheduling includes: the access network device sends scheduling information to the direct communication sending end user equipment (referred to as: the first terminal) through downlink control information (Downlink Control Information, DCI), and the first terminal sends the direct connection data to the direct communication receiving end user equipment (referred to as: the second terminal) through sidelink according to the scheduling information of the access network device.

[0005] Long Term Evolution (LTE) V2x only supports physical layer broadcast transmission, but does not support physical layer Hybrid Automatic Repeat Request (HARQ) feedback. There is currently no suitable solution for how the second terminal reports HARQ feedback to the access network device. Summary of the invention

[0006] The present disclosure provides a data transmission method, device, equipment and system for direct communication. The technical solution is as follows:

[0007] According to a first aspect of an embodiment of the present disclosure, a data transmission method for direct connection communication is provided, which is used in a first terminal, and the method includes:

[0008] Sending direct connection data to the second terminal through the direct connection link according to the DCI sent by the access network device;

[0009] receiving direct connection HARQ feedback information fed back by the second terminal, where the direct connection HARQ feedback information is used to indicate a reception status corresponding to the direct connection data;

[0010] The direct connection HARQ feedback information is reported to the access network device.

[0011] Optionally, reporting the direct connection HARQ feedback information to an access network device includes:

[0012] The direct connection HARQ feedback information is reported to the access network device via a physical uplink control channel (PUCCH) in a first time-frequency resource.

[0013] Optionally, the first time-frequency resource includes:

[0014] A preconfigured PUCCH resource for transmitting uplink HARQ feedback information for downlink data; or,

[0015] The pre-configured first terminal reports the PUCCH resources used for the direct HARQ feedback; or,

[0016] The PUCCH resources are obtained by mapping the third time-frequency resources used to transmit the DCI.

[0017] Optionally, the receiving the direct connection HARQ feedback information fed back by the second terminal includes:

[0018] Receive the direct link HARQ feedback information fed back by the second terminal through a direct link feedback channel (Physical Sidelink Feedback Channel, PSFCH) in a second time-frequency resource.

[0019] Optionally, the second time-frequency resource includes:

[0020] The pre-configured second terminal sends the PSFCH resource used for the direct HARQ feedback to the first terminal; or,

[0021] The second terminal obtains a PSFCH resource by mapping the fourth time-frequency resource used for transmitting the direct connection data; or

[0022] The second terminal obtains a PSFCH resource by mapping the first time-frequency resource used by the first terminal to report the direct HARQ feedback information; or

[0023] The first terminal or the second terminal configures the PSFCH resources according to the first time-frequency resources and the preset timing relationship.

[0024] Optionally, the method further includes:

[0025] Determine a data transmission parameter indicated by the access network device in an explicit manner or an implicit manner, where the data transmission parameter is used to indicate the first time-frequency resource and / or the second time-frequency resource.

[0026] Optionally, the DCI carries a data transmission parameter for indicating the first time-frequency resource and the second time-frequency resource; and the method further includes:

[0027] Sending a data transmission parameter indicating the second time-frequency resource to the second terminal.

[0028] Optionally, the data transmission parameter includes at least one of the following parameters:

[0029] A first physical resource indication, where the first physical resource indication is used to indicate a time domain and / or frequency domain resource used by the first terminal to report the direct HARQ feedback information;

[0030] a first feedback timing indication, where the first feedback timing indication is used to indicate a time interval between the direct connection data transmission and the first terminal reporting the corresponding direct connection HARQ feedback information;

[0031] A second physical resource indication, where the second physical resource indication is used to indicate a time domain and / or frequency domain resource used by the second terminal to send the direct HARQ feedback information;

[0032] The second feedback timing indication is used to indicate the time interval between the direct data transmission and the direct HARQ feedback information corresponding to the feedback of the second terminal.

[0033] Optionally, the method further includes:

[0034] receiving a first configuration signaling sent by the access network device, where the first configuration signaling is used to indicate a PUCCH resource set and / or a first time interval set corresponding to the direct HARQ feedback information;

[0035] The PUCCH resource set includes multiple PUCCH resources configured for reporting the direct HARQ feedback information, and the first time interval set includes the time interval between the configured direct data transmission and the first terminal reporting the corresponding direct HARQ feedback information.

[0036] Optionally, the first configuration signaling is a first radio resource control RRC signaling, and the first RRC signaling includes a first newly added field and a second newly added field, the first newly added field is used to indicate the PUCCH resource set, and the second newly added field is used to indicate the first time interval set.

[0037] Optionally, receiving a second configuration signaling sent by the access network device, where the second configuration signaling is used to indicate a PSFCH resource set and / or a second time interval set corresponding to the direct HARQ feedback information;

[0038] The PSFCH resource set includes multiple PSFCH resources configured for reporting the direct HARQ feedback information, and the second time interval set includes the time interval between the configured direct data transmission and the direct HARQ feedback information corresponding to the second terminal feedback.

[0039] Optionally, the second configuration signaling is a second radio resource control RRC signaling, and the second RRC signaling includes a third newly added field and a fourth newly added field, the third newly added field is used to indicate the PSFCH resource set, and the fourth newly added field is used to indicate the second time interval set.

[0040] According to a second aspect of an embodiment of the present disclosure, a data transmission method for direct communication is provided, which is used in an access network device, and the method includes:

[0041] Sending a DCI to a first terminal, where the DCI is used to instruct the first terminal to send direct connection data to a second terminal through a direct connection link; receiving direct connection HARQ feedback information fed back by the second terminal, where the direct connection HARQ feedback information is used to indicate a receiving state corresponding to the direct connection data; and reporting the direct connection HARQ feedback information to the access network device;

[0042] Receive the direct connection HARQ feedback information reported by the first terminal.

[0043] Optionally, the receiving the direct connection HARQ feedback information reported by the first terminal includes:

[0044] Receive the direct connection HARQ feedback information sent by the first terminal through PUCCH in the first time-frequency resource.

[0045] Optionally, the first time-frequency resource includes:

[0046] A preconfigured PUCCH resource for transmitting uplink HARQ feedback information for downlink data; or,

[0047] The pre-configured first terminal reports the PUCCH resources used for the direct HARQ feedback; or,

[0048] The PUCCH resources are obtained by mapping the third time-frequency resources used for transmitting the DCI.

[0049] Optionally, the method further includes:

[0050] A data transmission parameter is indicated to the first terminal in an explicit manner or an implicit manner, where the data transmission parameter is used to indicate the first time-frequency resource and / or the second time-frequency resource.

[0051] Optionally, the DCI carries data transmission parameters for indicating the first time-frequency resource and the second time-frequency resource, and the DCI is used to instruct the first terminal to send data transmission parameters for indicating the second time-frequency resource to the second terminal.

[0052] Optionally, the second time-frequency resource includes:

[0053] The pre-configured second terminal sends the PSFCH resource used for the direct HARQ feedback to the first terminal; or,

[0054] The second terminal obtains a PSFCH resource by mapping the fourth time-frequency resource used for transmitting the direct connection data; or

[0055] The second terminal obtains a PSFCH resource by mapping the first time-frequency resource used by the first terminal to report the direct HARQ feedback information; or

[0056] The first terminal or the second terminal configures the PSFCH resources according to the first time-frequency resources and the preset timing relationship.

[0057] Optionally, the data transmission parameter includes at least one of the following parameters:

[0058] A first physical resource indication, where the first physical resource indication is used to indicate a time domain and / or frequency domain resource used by the first terminal to report the direct HARQ feedback information;

[0059] a first feedback timing indication, where the first feedback timing indication is used to indicate a time interval between the direct connection data transmission and the first terminal reporting the corresponding direct connection HARQ feedback information;

[0060] A second physical resource indication, where the second physical resource indication is used to indicate a time domain and / or frequency domain resource used by the second terminal to send the direct HARQ feedback information;

[0061] The second feedback timing indication is used to indicate the time interval between the direct data transmission and the direct HARQ feedback information corresponding to the feedback of the second terminal.

[0062] Optionally, the method further includes:

[0063] Sending a first configuration signaling to the first terminal, where the first configuration signaling is used to indicate a PUCCH resource set and / or a first time interval set corresponding to the direct HARQ feedback information;

[0064] The PUCCH resource set includes multiple PUCCH resources configured for reporting the direct HARQ feedback information, and the first time interval set includes the time interval between the configured direct data transmission and the first terminal reporting the corresponding direct HARQ feedback information.

[0065] Optionally, the first configuration signaling is a first radio resource control RRC signaling, and the first RRC signaling includes a first newly added field and a second newly added field, the first newly added field is used to indicate the PUCCH resource set, and the second newly added field is used to indicate the first time interval set.

[0066] Optionally, the method further includes:

[0067] Sending a second configuration signaling to the first terminal and / or the second terminal, where the second configuration signaling is used to indicate a PSFCH resource set and / or a second time interval set corresponding to the direct HARQ feedback information;

[0068] The PSFCH resource set includes multiple PSFCH resources configured for reporting the direct HARQ feedback information, and the second time interval set includes the time interval between the configured direct data transmission and the direct HARQ feedback information corresponding to the second terminal feedback.

[0069] Optionally, the second configuration signaling is a second radio resource control RRC signaling, and the second RRC signaling includes a third newly added field and a fourth newly added field, the third newly added field is used to indicate the PSFCH resource set, and the fourth newly added field is used to indicate the second time interval set.

[0070] According to a third aspect of an embodiment of the present disclosure, a data transmission device for direct communication is provided, which is used in a first terminal, and the device includes:

[0071] A sending module, configured to send direct connection data to the second terminal through a direct connection link according to the DCI sent by the access network device;

[0072] a receiving module, configured to receive direct connection HARQ feedback information fed back by the second terminal, where the direct connection HARQ feedback information is used to indicate a receiving state corresponding to the direct connection data;

[0073] The sending module is configured to report the direct connection HARQ feedback information to the access network device.

[0074] Optionally, the sending module is further configured to report the direct connection HARQ feedback information to the access network device via PUCCH in the first time-frequency resource.

[0075] Optionally, the first time-frequency resource includes:

[0076] A preconfigured PUCCH resource for transmitting uplink HARQ feedback information for downlink data; or,

[0077] The pre-configured first terminal reports the PUCCH resources used for the direct HARQ feedback; or,

[0078] The PUCCH resources are obtained by mapping the third time-frequency resources used to transmit the DCI.

[0079] Optionally, the receiving module is further configured to receive the direct connection HARQ feedback information fed back by the second terminal via PSFCH in the second time-frequency resource.

[0080] Optionally, the second time-frequency resource includes:

[0081] The pre-configured second terminal sends the PSFCH resource used for the direct HARQ feedback to the first terminal; or,

[0082] The second terminal obtains a PSFCH resource by mapping the fourth time-frequency resource used for transmitting the direct connection data; or

[0083] The second terminal obtains a PSFCH resource by mapping the first time-frequency resource used by the first terminal to report the direct HARQ feedback information; or

[0084] The first terminal or the second terminal configures the PSFCH resources according to the first time-frequency resources and the preset timing relationship.

[0085] Optionally, the device further includes:

[0086] The processing module is configured to determine a data transmission parameter indicated by the access network device in an explicit or implicit manner, where the data transmission parameter is used to indicate the first time-frequency resource and / or the second time-frequency resource.

[0087] Optionally, the DCI carries data transmission parameters for indicating the first time-frequency resource and the second time-frequency resource;

[0088] The sending module is further configured to send a data transmission parameter indicating the second time-frequency resource to the second terminal.

[0089] Optionally, the data transmission parameter includes at least one of the following parameters:

[0090] A first physical resource indication, where the first physical resource indication is used to indicate a time domain and / or frequency domain resource used by the first terminal to report the direct HARQ feedback information;

[0091] a first feedback timing indication, where the first feedback timing indication is used to indicate a time interval between the direct connection data transmission and the first terminal reporting the corresponding direct connection HARQ feedback information;

[0092] A second physical resource indication, where the second physical resource indication is used to indicate a time domain and / or frequency domain resource used by the second terminal to send the direct HARQ feedback information;

[0093] The second feedback timing indication is used to indicate the time interval between the direct data transmission and the direct HARQ feedback information corresponding to the feedback of the second terminal.

[0094] Optionally, the device further comprises:

[0095] The receiving module is further configured to receive a first configuration signaling sent by the access network device, where the first configuration signaling is used to indicate a PUCCH resource set and / or a first time interval set corresponding to the direct HARQ feedback information;

[0096] The PUCCH resource set includes multiple PUCCH resources configured for reporting the direct HARQ feedback information, and the first time interval set includes the time interval between the configured direct data transmission and the first terminal reporting the corresponding direct HARQ feedback information.

[0097] Optionally, the first configuration signaling is a first radio resource control RRC signaling, and the first RRC signaling includes a first newly added field and a second newly added field, the first newly added field is used to indicate the PUCCH resource set, and the second newly added field is used to indicate the first time interval set.

[0098] Optionally, the device further comprises:

[0099] The receiving module is further configured to receive a second configuration signaling sent by the access network device, where the second configuration signaling is used to indicate a PSFCH resource set and / or a second time interval set corresponding to the direct HARQ feedback information;

[0100] The PSFCH resource set includes multiple PSFCH resources configured for reporting the direct HARQ feedback information, and the second time interval set includes the time interval between the configured direct data transmission and the direct HARQ feedback information corresponding to the second terminal feedback.

[0101] Optionally, the second configuration signaling is a second radio resource control RRC signaling, and the second RRC signaling includes a third newly added field and a fourth newly added field, the third newly added field is used to indicate the PSFCH resource set, and the fourth newly added field is used to indicate the second time interval set.

[0102] According to a fourth aspect of an embodiment of the present disclosure, a data transmission device for direct communication is provided, which is used in an access network device, and the device includes:

[0103] a sending module, configured to send a DCI to a first terminal, where the DCI is used to instruct the first terminal to send direct connection data to a second terminal through a direct connection link; receive direct connection HARQ feedback information fed back by the second terminal, where the direct connection HARQ feedback information is used to indicate a receiving state corresponding to the direct connection data; and report the direct connection HARQ feedback information to the access network device;

[0104] The receiving module is configured to receive the direct connection HARQ feedback information reported by the first terminal.

[0105] Optionally, the receiving module is further configured to receive the direct connection HARQ feedback information sent by the first terminal via PUCCH in the first time-frequency resource.

[0106] Optionally, the first time-frequency resource includes:

[0107] A preconfigured PUCCH resource for transmitting uplink HARQ feedback information for downlink data; or,

[0108] The pre-configured first terminal reports the PUCCH resources used for the direct HARQ feedback; or,

[0109] The PUCCH resources are obtained by mapping the third time-frequency resources used for transmitting the DCI.

[0110] Optionally, the device further includes:

[0111] The sending module is further configured to indicate data transmission parameters to the first terminal in an explicit or implicit manner, where the data transmission parameters are used to indicate the first time-frequency resources and / or the second time-frequency resources.

[0112] Optionally, the DCI carries data transmission parameters for indicating the first time-frequency resource and the second time-frequency resource, and the DCI is used to instruct the first terminal to send data transmission parameters for indicating the second time-frequency resource to the second terminal.

[0113] Optionally, the second time-frequency resource includes:

[0114] The pre-configured second terminal sends the PSFCH resource used for the direct HARQ feedback to the first terminal; or,

[0115] The second terminal obtains a PSFCH resource by mapping the fourth time-frequency resource used for transmitting the direct connection data; or

[0116] The second terminal obtains a PSFCH resource by mapping the first time-frequency resource used by the first terminal to report the direct HARQ feedback information; or

[0117] The first terminal or the second terminal configures the PSFCH resources according to the first time-frequency resources and the preset timing relationship.

[0118] Optionally, the data transmission parameter includes at least one of the following parameters:

[0119] A first physical resource indication, where the first physical resource indication is used to indicate a time domain and / or frequency domain resource used by the first terminal to report the direct HARQ feedback information;

[0120] a first feedback timing indication, where the first feedback timing indication is used to indicate a time interval between the direct connection data transmission and the first terminal reporting the corresponding direct connection HARQ feedback information;

[0121] A second physical resource indication, where the second physical resource indication is used to indicate a time domain and / or frequency domain resource used by the second terminal to send the direct HARQ feedback information;

[0122] The second feedback timing indication is used to indicate the time interval between the direct data transmission and the direct HARQ feedback information corresponding to the feedback of the second terminal.

[0123] Optionally, the device further comprises:

[0124] The sending module is further configured to send a first configuration signaling to the first terminal, where the first configuration signaling is used to indicate a PUCCH resource set and / or a first time interval set corresponding to the direct HARQ feedback information;

[0125] The PUCCH resource set includes multiple PUCCH resources configured for reporting the direct HARQ feedback information, and the first time interval set includes the time interval between the configured direct data transmission and the first terminal reporting the corresponding direct HARQ feedback information.

[0126] Optionally, the first configuration signaling is a first radio resource control RRC signaling, and the first RRC signaling includes a first newly added field and a second newly added field, the first newly added field is used to indicate the PUCCH resource set, and the second newly added field is used to indicate the first time interval set.

[0127] Optionally, the device further comprises:

[0128] The sending module is further configured to send a second configuration signaling to the first terminal and / or the second terminal, where the second configuration signaling is used to indicate a PSFCH resource set and / or a second time interval set corresponding to the direct HARQ feedback information;

[0129] The PSFCH resource set includes multiple PSFCH resources configured for reporting the direct HARQ feedback information, and the second time interval set includes the time interval between the configured direct data transmission and the direct HARQ feedback information corresponding to the second terminal feedback.

[0130] Optionally, the second configuration signaling is a second radio resource control RRC signaling, and the second RRC signaling includes a third newly added field and a fourth newly added field, the third newly added field is used to indicate the PSFCH resource set, and the fourth newly added field is used to indicate the second time interval set.

[0131] According to a fifth aspect of an embodiment of the present disclosure, a terminal is provided, the terminal including:

[0132] processor;

[0133] a transceiver connected to the processor;

[0134] a memory for storing processor-executable instructions;

[0135] The processor is configured to load and execute the executable instructions to implement the steps of the data transmission method for direct communication as described in the first aspect or any possible implementation manner of the first aspect.

[0136] According to a sixth aspect of an embodiment of the present disclosure, an access network device is provided, the access network device comprising:

[0137] processor;

[0138] a transceiver connected to the processor;

[0139] a memory for storing processor-executable instructions;

[0140] The processor is configured to load and execute the executable instructions to implement the steps of the data transmission method for direct communication as described in the second aspect or any possible implementation manner of the second aspect.

[0141] According to a seventh aspect of an embodiment of the present disclosure, there is provided a data transmission system for direct communication, the data transmission system comprising a terminal and an access network device;

[0142] The terminal is a data transmission device according to the third aspect or any possible implementation manner of the third aspect;

[0143] The access network is a data transmission device as described in the fourth aspect or any possible implementation manner of the fourth aspect.

[0144] According to an eighth aspect of an embodiment of the present disclosure, there is provided a data transmission system for direct communication, the data transmission system comprising a terminal and an access network device;

[0145] The terminal is the data transmission device according to the fifth aspect;

[0146] The access network is the data transmission device described in the sixth aspect.

[0147] According to a ninth aspect of an embodiment of the present disclosure, a computer-readable storage medium is provided, wherein at least one instruction, at least one program, a code set, or an instruction set is stored in the computer-readable storage medium, and the at least one instruction, the at least one program, the code set, or the instruction set is loaded and executed by the processor to implement the steps of the data transmission method for direct communication as described in the first aspect or any possible implementation manner of the first aspect, or to implement the steps of the data transmission method for direct communication as described in the second aspect or any possible implementation manner of the first aspect.

[0148] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

[0149] Direct data is sent to the second terminal through a direct link via the first terminal; direct HARQ feedback information fed back by the second terminal is received, and the direct HARQ feedback information is used to indicate the receiving status corresponding to the direct data; the direct HARQ feedback information is reported to the access network device; in a direct communication scenario based on access network device scheduling, even if the first terminal and the second terminal may be under the coverage of different access network devices, or are out of network coverage, the direct HARQ feedback information can also be transmitted from the second terminal to the first terminal first, and then reported to the access network device by the first terminal, thereby ensuring the success rate of information sending and receiving in the direct communication scenario and helping to improve the efficiency of data transmission.

[0150] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0151] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0152] Figure 1 is a schematic diagram of a network architecture to which the embodiments of the present disclosure may be applicable;

[0153] Figure 2 is a flow chart of a data transmission method for direct connection communication according to an exemplary embodiment;

[0154] Figure 3 is a flow chart of a data transmission method for direct connection communication according to another exemplary embodiment;

[0155] Figure 4 is a block diagram of a data transmission device for direct communication according to an exemplary embodiment;

[0156] Figure 5 is a block diagram of a data transmission device for direct connection communication according to another exemplary embodiment;

[0157] Figure 6 is a block diagram of a terminal according to an exemplary embodiment;

[0158] Figure 7 The invention is a block diagram of an access network device according to an exemplary embodiment. DETAILED DESCRIPTION

[0159] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0160] The network architecture and business scenarios described in the embodiments of the present disclosure are intended to more clearly illustrate the technical solutions of the embodiments of the present disclosure, and do not constitute a limitation on the technical solutions provided by the embodiments of the present disclosure. A person of ordinary skill in the art can appreciate that with the evolution of the network architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of the present disclosure are equally applicable to similar technical problems.

[0161] Figure 1 A schematic diagram of a network architecture that may be applicable to an embodiment of the present disclosure is shown. The network architecture may be a network architecture of a C-V2X system. C refers to cellular (English: Cellular), and the C-V2X system is an in-vehicle wireless communication system evolved based on cellular network communication systems such as 3G, 4G or 5G. The network architecture may include: a core network 11, an access network 12, a terminal 13 and a vehicle 14.

[0162] The core network 11 includes several core network devices. The functions of the core network devices are mainly to provide user connection, user management, and service bearing, and to provide an interface to the external network as a bearer network. For example, the core network of the Long Term Evolution (LTE) system may include devices such as a mobility management entity (MME), a serving gateway (S-GW), and a PDN gateway (P-GW). The core network of the 5G NR system may include devices such as an access and mobility management function (AMF) entity, a user plane function (UPF) entity, and a session management function (SMF) entity.

[0163] The access network 12 includes several access network devices 120. The access network device 120 communicates with the core network device 110 through a certain interface technology, such as the S1 interface in the LTE system and the NG interface in the 5G NR system. The access network device 120 can be a base station (BS), which is a device deployed in the access network to provide wireless communication functions for terminals. The base station may include various forms of macro base stations, micro base stations, relay stations, access points, etc. In systems using different wireless access technologies, the names of devices with base station functions may be different. For example, in the LTE system, it is called eNodeB or eNB; in the 5G NR system, it is called gNodeB or gNB. With the evolution of communication technology, the name "base station" may change. For the convenience of description, in the embodiments of the present disclosure, the above-mentioned devices that provide wireless communication functions for terminals are collectively referred to as access network devices.

[0164] The terminal 13 may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to a wireless modem, as well as various forms of user equipment (UE), mobile stations (MS), terminals (terminal devices), etc. For the convenience of description, the above-mentioned devices are collectively referred to as terminals. The access network device 120 and the terminal 13 communicate with each other through some air interface technology, such as a Uu interface.

[0165] The vehicle 14 can be an autonomous driving vehicle or a non-autonomous driving vehicle. The vehicle 14 is equipped with an on-board device, through which the vehicle 14 communicates with other vehicles, the terminal 13 or other devices, such as a roadside unit (RSU). The on-board device may also be referred to as an on-board terminal, an on-board communication device or other names, which is not limited in the embodiments of the present disclosure. The on-board device may be a device integrated in a telematics box (Telematics BOX, T-BOX), or it may be a device separated from the vehicle body. In addition, the on-board device may be installed in the vehicle 14 before the vehicle 14 leaves the factory, or it may be installed in the vehicle 14 after the vehicle 14 leaves the factory.

[0166] The on-board equipment of the vehicle 14 and other equipment (such as other on-board equipment, terminal 13, RSU, etc.) can communicate with each other through a direct communication interface (such as PC5 interface). Accordingly, the communication link established based on the direct communication interface can be called a direct link or a side link. In addition, the on-board equipment of the vehicle 14 and other equipment can also be transferred through the access network 12 and the core network 11, that is, the communication link between the terminal 13 and the access network equipment 120 in the original cellular network is used for communication. Compared with the communication based on the Uu interface, the communication based on the direct communication interface has the characteristics of short delay and low overhead, and is suitable for communication between on-board equipment and other peripheral devices with close geographical locations.

[0167] Above Figure 1 The network architecture shown can realize the V2X service scenario, and the above network architecture can also include RSU, V2X application server, V2X control function node and other devices, which are not limited in the embodiments of the present disclosure. In addition, the technical solution described in the embodiments of the present disclosure can be applied to the 5G NR system and can also be applied to the subsequent evolution system of the 5G NR system.

[0168] In an embodiment of the present disclosure, a data transmission method for direct communication is provided for the direct communication scenario in the above-mentioned V2X service scenario to solve the problem of resource conflict.

[0169] In the embodiment of the present disclosure, the first terminal and the second terminal are two end devices that perform direct communication in the V2X service scenario. A side link can be established between the first terminal and the second terminal through a direct communication interface (such as a PC5 interface), and then the user plane data and control plane signaling are exchanged through the side link. For example, the first terminal can be Figure 1 The vehicle 14 in the network architecture shown in the figure is an on-board device, and the second terminal can be an on-board device of another vehicle, or can be the terminal 13 or RSU, etc. For another example, the first terminal can be Figure 1 The terminal 13 in the network architecture shown, the second terminal can be other terminals, or it can be a vehicle-mounted device or RSU of the vehicle 14. In some embodiments, for the same device (such as the same vehicle-mounted device or the same terminal), it can be used as the first terminal in some scenarios and as the second terminal in other scenarios.

[0170] In the embodiment of the present disclosure, the first terminal is also referred to as a direct communication sending end user equipment, and the second terminal is also referred to as a direct communication receiving end user equipment.

[0171] The technical solution of the present disclosure is introduced and illustrated below through several exemplary embodiments.

[0172] Figure 2is a flow chart of a data transmission method for direct communication according to an exemplary embodiment. The method can be applied to Figure 1 In the network architecture shown in FIG. 1 , the method may include the following steps.

[0173] In step 201, an access network device sends a DCI to a first terminal.

[0174] Optionally, the access network device sends a DCI to the first terminal, where the DCI carries data transmission parameters.

[0175] In step 202, the first terminal sends direct connection data to the second terminal through a direct connection link according to DCI.

[0176] The first terminal sends direct connection data to the second terminal through a direct connection link according to the DCI sent by the access network device.

[0177] Optionally, the first terminal receives DCI sent by the access network device through a downlink channel, and sends direct connection data to the second terminal through a direct connection link according to data transmission parameters in the DCI.

[0178] Optionally, the DCI is a DCI used to schedule direct data transmission.

[0179] Schematically, the downlink channel includes a physical downlink control channel (Physical Downlink Control Channel, PDCCH).

[0180] Optionally, the data transmission parameters are used to indicate time-frequency resources and / or modulation and coding methods.

[0181] Optionally, the first terminal receives DCI sent by the access network device through a downlink channel, and sends direct connection data to the second terminal through a direct connection link according to the time-frequency resources and / or modulation coding method indicated by the data transmission parameters in the DCI.

[0182] The direct connection data is physical layer data sent by the first terminal to the second terminal via the direct connection link.

[0183] The first terminal sends the direct connection data to the second terminal using the fourth time-frequency resource of the direct connection link.

[0184] Optionally, the fourth time-frequency resource is a predefined or preconfigured time-frequency resource.

[0185] Optionally, the first terminal may also send control information to the second terminal before or while the direct connection data is sent, where the control information is used to indicate information related to the reception of the physical layer data.

[0186] Optionally, the receiving related information includes: the time domain position and / or frequency domain position of the fourth time-frequency resource used to carry the physical layer data. In some embodiments, the receiving related information also includes: the modulation and coding scheme (MCS) of the physical layer data, the hybrid automatic repeat request process identifier (HybridARQ Process Number, HARQ-ID), the new data indication (New-Data Indicator, NDI) and other information.

[0187] In step 203, the second terminal feeds back direct HARQ feedback information to the first terminal.

[0188] Correspondingly, the second terminal receives the direct connection data sent by the first terminal. Optionally, the second terminal receives the direct connection data sent by the first terminal using the fourth time-frequency resource of the direct connection link.

[0189] The second terminal feeds back direct connection HARQ feedback information to the first terminal, where the direct connection HARQ feedback information includes a HARQ feedback bit corresponding to at least one direct connection data transmission.

[0190] Indicatively, the number of HARQ feedback bits corresponding to one direct data transmission is 1 bit (English: bit) or 2 bits.

[0191] The direct connection HARQ feedback information is used to indicate the receiving state corresponding to the direct connection data. The receiving state corresponding to the direct connection data includes: an acknowledgement receiving state (Acknowledgement, ACK) or a non-acknowledgement receiving state (Non-Acknowledgement, NACK).

[0192] ACK is used to indicate that the direct connection data is correctly received by the second terminal.

[0193] NACK includes a non-received state and / or an incorrectly received state. The non-received state is used to indicate that the direct connection data is not received by the second terminal; the incorrectly received state is used to indicate that although the direct connection data is received by the second terminal, the direct connection data received by the second terminal is different from the direct connection data sent by the first terminal, that is, erroneous direct connection data is received.

[0194] After receiving the direct connection data, the second terminal processes the received direct connection data, for example, the second terminal demodulates and decodes the direct connection data. During the processing, the second terminal determines the receiving state of the direct connection data.

[0195] Optionally, the second terminal sends direct HARQ feedback information to the first terminal via a direct channel. Schematically, the direct channel is PSFCH.

[0196] In step 204, the first terminal receives the direct HARQ feedback information fed back by the second terminal.

[0197] Correspondingly, the first terminal receives the direct connection HARQ feedback information sent by the second terminal through the PSFCH.

[0198] It should be noted that the direct communication scenario between the first terminal and the second terminal in the embodiment of the present disclosure is a direct communication scenario based on the scheduling of the access network device. That is, the first terminal sends data based on the scheduling of the access network device. For the direct communication method based on the scheduling of the access network device, since the scheduling is completed by the access network device side, the direct HARQ feedback information corresponding to the direct data needs to be transmitted back to the access network device from the second terminal to facilitate the scheduling of data retransmission or new data transmission on the access network device side. Considering that the first terminal and the second terminal may be under different access network device coverage, or outside the network coverage, the direct HARQ feedback information needs to be transmitted from the second terminal to the first terminal first, and then reported to the access network device by the first terminal.

[0199] In step 205, the first terminal reports the direct connection HARQ feedback information to the access network device.

[0200] Optionally, the first terminal reports the direct connection HARQ feedback information to the access network device on the physical layer uplink channel of the target time unit.

[0201] Optionally, the target time unit refers to the time unit corresponding to when the terminal device needs to send uplink HARQ feedback bits and direct HARQ feedback information. Schematically, the target time unit is a symbol (English: symbol), b symbol groups (English: symbol group), c time slots (English: slot) or d subframes (English: subframe), a, b, c, d are positive integers, which are not limited in this embodiment.

[0202] Optionally, the physical layer uplink channel is an uplink channel used to send direct HARQ feedback information to the access network device.

[0203] Optionally, the physical layer uplink channel is an uplink channel based on a first communication protocol or a second communication protocol. The first communication protocol includes an LTE protocol, and the second communication protocol includes an NR protocol.

[0204] Optionally, the physical layer uplink channel is a PUCCH. Illustratively, the PUCCH channel format is any one of PUCCH format 1, PUCCH format 1a, PUCCH format 1b, PUCCH format 2, PUCCH format 2a, PUCCH format 2b, PUCCH format 3, PUCCH format 4 and PUCCH format 5.

[0205] In step 206, the access network device receives the direct connection HARQ feedback information reported by the first terminal.

[0206] To summarize, in this embodiment, the first terminal sends direct data to the second terminal through a direct link; receives direct HARQ feedback information fed back by the second terminal, where the direct HARQ feedback information is used to indicate the receiving status corresponding to the direct data; reports the direct HARQ feedback information to the access network device; in a direct communication scenario based on access network device scheduling, even if the first terminal and the second terminal may be under the coverage of different access network devices, or are outside the network coverage, the direct HARQ feedback information can be first transmitted from the second terminal to the first terminal, and then reported to the access network device by the first terminal, thereby ensuring the success rate of information sending and receiving in the direct communication scenario, and helping to improve the efficiency of data transmission.

[0207] It should be noted that, since the embodiments of the present disclosure involve multiple time-frequency resources, the multiple time-frequency resources are first described.

[0208] First time-frequency resources: time domain and / or frequency domain resources used by the first terminal to report direct HARQ feedback information to the access network device.

[0209] Second time-frequency resources: time domain and / or frequency domain resources used by the second terminal to send direct HARQ feedback information to the first terminal.

[0210] Third time-frequency resources: time domain and / or frequency domain resources used by the access network device to send DCI to the first terminal.

[0211] Fourth time-frequency resources: time domain and / or frequency domain resources used by the first terminal to send direct connection data to the second terminal.

[0212] Figure 3 is a flow chart of a data transmission method for direct communication according to an exemplary embodiment. The method can be applied to Figure 1 In the network architecture shown in FIG. 1 , the method may include the following steps.

[0213] In step 301, an access network device sends a first configuration signaling to a first terminal.

[0214] Optionally, the first configuration signaling is used to indicate a PUCCH resource set and / or a first time interval set corresponding to the direct HARQ feedback information.

[0215] The PUCCH resource set includes multiple PUCCH resources configured for reporting direct HARQ feedback information, and the first time interval set includes the time interval between the configured direct data transmission and the first terminal reporting the corresponding direct HARQ feedback information.

[0216] Optionally, the first configuration signaling is a first RRC signaling, and the first RRC signaling includes a first newly added field and a second newly added field, the first newly added field is used to indicate a PUCCH resource set, and the second newly added field is used to indicate a first time interval set.

[0217] Indicatively, the first newly added field resourceSetSL in the first RRC signaling PUCCH-config is dedicated to configuring the PUCCH resources used for direct HARQ feedback information; the second newly added field Sl-DataToUL-ACK is dedicated to configuring the first time interval set.

[0218] In step 302, the access network device sends a second configuration signaling to the second terminal.

[0219] Optionally, the second configuration signaling is used to indicate a PSFCH resource set and / or a second time interval set corresponding to the direct HARQ feedback information.

[0220] The PSFCH resource set includes multiple PSFCH resources configured for reporting direct HARQ feedback information, and the second time interval set includes the time interval between the configured direct data transmission and the direct HARQ feedback information corresponding to the second terminal feedback.

[0221] Optionally, the access network device sends the second configuration signaling to the first terminal and / or the second terminal.

[0222] In a possible implementation, the access network device sends the second configuration signaling to the first terminal and the second terminal respectively. Correspondingly, both the first terminal and the second terminal receive the second configuration signaling sent by the access network device.

[0223] Optionally, the second configuration signaling is a second RRC signaling, and the second RRC signaling includes a third newly added field and a fourth newly added field, the third newly added field is used to indicate a PSFCH resource set, and the fourth newly added field is used to indicate a second time interval set.

[0224] Indicatively, the third newly added field resourceSetSL in the second RRC signaling PSFCH-config is dedicated to configuring the PSFCH resources used for direct HARQ feedback information; the fourth newly added field Sl-DataToUL-ACK is dedicated to configuring the second time interval set.

[0225] In another possible implementation manner, the access network device sends the second configuration signaling to the first terminal, and the first terminal forwards the second configuration signaling to the second terminal.

[0226] In another possible implementation, the access network device sends the second configuration signaling to the second terminal, and the second terminal sends the second configuration signaling to the first terminal. This embodiment does not limit the implementation of the access network device sending the second configuration signaling to the second terminal.

[0227] In step 303, the access network device sends DCI to the first terminal.

[0228] The DCI is used to instruct the first terminal to send direct connection data to the second terminal via the direct connection link. Optionally, the DCI is used to instruct the first terminal to send the direct connection data to the second terminal using a fourth time-frequency resource.

[0229] Optionally, the access network device indicates a data transmission parameter to the first terminal in an explicit or implicit manner, where the data transmission parameter is used to indicate the first time-frequency resource and / or the second time-frequency resource.

[0230] The method in which the access network device indicates data transmission parameters to the first terminal in an explicit manner includes: the access network device sends a DCI to the first terminal, and the DCI also carries data transmission parameters for indicating the first time-frequency resources and the second time-frequency resources.

[0231] Optionally, the data transmission parameter includes at least one of the following parameters:

[0232] The first physical resource indication is used to indicate the time domain and / or frequency domain resources used by the first terminal to report the direct connection HARQ feedback information.

[0233] The first feedback timing indication is used to indicate the time interval between direct connection data transmission and the first terminal reporting the corresponding direct connection HARQ feedback information.

[0234] The second physical resource indication is used to indicate the time domain and / or frequency domain resources used by the second terminal to send the direct HARQ feedback information.

[0235] The second feedback timing indication is used to indicate the time interval between the direct connection data transmission and the direct connection HARQ feedback information corresponding to the feedback of the second terminal.

[0236] Illustratively, the first physical resource indicator is a PUCCH resource indicator, the first physical resource indicator is used for a first time domain resource, and the first feedback timing indicator is a PSSCH-to-ULHARQ_feedback timing indicator. The second physical resource indicator is a PFSCH resource indicator, and the second feedback timing indicator is a PSSCH-to-SLHARQ_feedback timing indicator. The time domain is the time domain length and the specific time domain symbol occupied in the time slot.

[0237] Optionally, the time domain and / or frequency domain resources used by the first terminal to report direct HARQ feedback information are first time-frequency resources, and the first time-frequency resource is a PUCCH resource in a PUCCH resource set configured by the access network device for direct HARQ feedback information.

[0238] Optionally, the time domain and / or frequency domain resources used by the second terminal to send direct HARQ feedback information are second time-frequency resources, and the second time-frequency resources are one PSFCH resource in a PSFCH resource set configured by the access network device for direct HARQ feedback information.

[0239] In step 304, the first terminal sends direct connection data and SCI to the second terminal through the direct connection link according to the DCI.

[0240] Correspondingly, the first terminal determines, based on the DCI, the data transmission parameters indicated by the access network device in an explicit or implicit manner, where the data transmission parameters are used to indicate the first time-frequency resources and / or the second time-frequency resources.

[0241] When the access network device indicates data transmission parameters to the first terminal in an explicit manner, the corresponding first terminal receives the DCI sent by the access network device, and the DCI carries data transmission parameters for indicating the first time-frequency resources and the second time-frequency resources; and sends data transmission parameters for indicating the second time-frequency resources to the second terminal.

[0242] That is, when DCI is used to indicate the first time-frequency resources, the second time-frequency resources and the fourth time-frequency resources, the first terminal prepares to report the direct connection HARQ feedback information according to the first time-frequency resources, and uses the fourth time-frequency resources of the direct connection link to send the direct connection data and SCI to the second terminal, wherein the SCI carries data transmission parameters for indicating the second time-frequency resources.

[0243] In step 305, the second terminal feeds back direct connection HARQ feedback information in the second time-frequency resource through the PSFCH according to the direct connection data and the SCI.

[0244] The second time-frequency resource may be explicitly configured by the access network device, or may be implicitly indicated by the access network device.

[0245] In a possible implementation manner, the second time-frequency resource is explicitly configured by the access network device, and the second time-frequency resource includes: a pre-configured PSFCH resource used by the second terminal to send direct HARQ feedback to the first terminal.

[0246] Optionally, the second terminal receives the direct connection data and SCI sent by the first terminal, and determines the second time-frequency resource indicated by the SCI.

[0247] In another possible implementation, the second time-frequency resource is implicitly indicated by the access network device, that is, the second time-frequency resource is obtained by the first terminal or the second terminal according to a defined mapping rule. The second time-frequency resource includes: the PSFCH resource obtained by the second terminal according to the fourth time-frequency resource used for transmitting direct connection data; or the PSFCH resource obtained by the second terminal according to the first time-frequency resource used by the first terminal to report direct connection HARQ feedback information.

[0248] Optionally, mapping rules are predefined or preconfigured.

[0249] For example, the mapping rule between the second time-frequency resource and the fourth time-frequency resource includes: the frequency domain starting positions of the second time-frequency resource and the fourth time-frequency resource are the same, and the time unit used by the second time-frequency resource is the Kth time unit after the time unit used by the fourth time-frequency resource, where K is a positive integer.

[0250] For another example, the mapping rule between the second time-frequency resource and the first time-frequency resource includes: the frequency domain starting position of the second time-frequency resource is the same as that of the first time-frequency resource, and the time unit used by the second time-frequency resource is the Mth time unit before the time unit used by the first time-frequency resource. Wherein, M is a positive integer. This embodiment does not limit the method for obtaining the second time-frequency resource according to the mapping rule.

[0251] In another possible implementation, the second time-frequency resource is determined autonomously by the first terminal or the second terminal. The second time-frequency resource includes: a PSFCH resource configured by the first terminal or the second terminal according to the first time-frequency resource and a preset timing relationship.

[0252] Optionally, the first terminal or the second terminal autonomously determines the second time-frequency resource, and the second time-frequency resource meets the delay requirement of the first terminal reporting direct HARQ feedback information. For example, the preset timing relationship includes that the time unit used by the second time-frequency resource is earlier than the time unit used by the first time-frequency resource, and the absolute value of the difference between the two is greater than the transmission threshold.

[0253] The direct connection HARQ feedback information is used to indicate the receiving status corresponding to the direct connection data. The receiving status corresponding to the direct connection data includes: ACK or NACK.

[0254] In step 306, the first terminal reports the direct connection HARQ feedback information to the access network device.

[0255] Optionally, the first terminal receives the direct connection HARQ feedback information fed back by the second terminal, and reports the direct connection HARQ feedback information to the access network device through the PUCCH in the first time-frequency resource.

[0256] Optionally, the first time-frequency resource may be explicitly configured by the access network device, or may be implicitly indicated by the access network device.

[0257] In one possible implementation, the second time-frequency resource is explicitly configured by the access network device, and the first time-frequency resource includes: a pre-configured PUCCH resource for transmitting uplink HARQ feedback information of downlink data; or a pre-configured PUCCH resource used by the first terminal to report direct HARQ feedback.

[0258] Optionally, the first terminal reuses a PUCCH resource preconfigured for transmitting uplink HARQ feedback information of downlink data to report direct connection HARQ feedback information to the access network device.

[0259] Optionally, the DCI received by the first terminal carries data transmission parameters for indicating the first time-frequency resources, and the second terminal reports direct connection HARQ feedback information to the access network device in the indicated first time-frequency resources.

[0260] In another possible implementation, the first time-frequency resource is implicitly indicated by the access network device, that is, the first time-frequency resource is obtained by the first terminal according to a defined mapping rule. The first time-frequency resource includes: a PUCCH resource obtained by mapping the third time-frequency resource used to transmit the DCI.

[0261] Optionally, the first terminal receives the DCI sent by the access network device, and determines the first time-frequency resource based on a mapping relationship according to the third time-frequency resource used for DCI transmission.

[0262] Optionally, mapping rules are predefined or preconfigured.

[0263] For example, the mapping rule between the first time-frequency resource and the third time-frequency resource includes: the frequency domain starting positions of the first time-frequency resource and the third time-frequency resource are the same, and the time unit used by the first time-frequency resource is the Nth time unit after the time unit used by the third time-frequency resource, where N is a positive integer.

[0264] If the first terminal does not receive the direct connection HARQ feedback information sent by the second terminal before reporting the direct connection HARQ feedback information, the first terminal sends the direct connection HARQ feedback information indicating NACK to the access network device.

[0265] In step 307, the access network device receives the direct connection HARQ feedback information reported by the first terminal.

[0266] Optionally, the access network device receives direct connection HARQ feedback information reported by the first terminal via PUCCH in the first time-frequency resource.

[0267] To summarize, this embodiment also includes a pre-configured PUCCH resource for transmitting uplink HARQ feedback information of downlink data through the first time-frequency resource, so that the first terminal can report direct HARQ feedback information to the access network device through the reused PUCCH resource, thereby making it unnecessary for the access network device to configure a dedicated PUCCH resource set for the direct HARQ feedback information, thereby saving the signaling interaction process between the access network device and the first terminal and improving the utilization rate of the PUCCH resources for transmitting uplink HARQ feedback information of downlink data.

[0268] This embodiment also indicates data transmission parameters to the first terminal in an explicit manner through the access network device, and the data transmission parameters are used to indicate the first time-frequency resources and / or the second time-frequency resources, so that the first terminal or the second terminal can quickly determine the time-frequency resources for transmitting direct HARQ feedback information, thereby improving the efficiency of HARQ feedback.

[0269] This embodiment also indicates data transmission parameters to the first terminal in an implicit manner through the access network device, and the data transmission parameters are used to indicate the first time-frequency resources and / or the second time-frequency resources; so that during the signaling interaction between the access network device, the first terminal and the second terminal, there is no need to carry an explicit field for indicating the time-frequency resources for direct HARQ feedback information. The first terminal or the second terminal can determine the time-frequency resources for transmitting the direct HARQ feedback information according to the mapping rules or independently, thereby reducing the amount of data that needs to be carried during the signaling interaction between the access network device, the first terminal and the second terminal.

[0270] The following are embodiments of the device disclosed herein, which can be used to execute the method embodiments disclosed herein. For details not disclosed in the device embodiments disclosed herein, please refer to the method embodiments disclosed herein.

[0271] Figure 4400 may include: a sending module 410, a processing module 420, and a receiving module 430.

[0272] The sending module 410 is configured to send direct connection data to the second terminal through the direct connection link according to the DCI sent by the access network device;

[0273] The receiving module 430 is configured to receive direct connection HARQ feedback information fed back by the second terminal, where the direct connection HARQ feedback information is used to indicate a receiving state corresponding to the direct connection data;

[0274] The sending module 410 is configured to report the direct connection HARQ feedback information to the access network device.

[0275] Optionally, the sending module 410 is further configured to report the direct connection HARQ feedback information to the access network device via the PUCCH in the first time-frequency resource.

[0276] Optionally, the first time-frequency resource includes:

[0277] A preconfigured PUCCH resource for transmitting uplink HARQ feedback information for downlink data; or,

[0278] The pre-configured first terminal reports the PUCCH resources used for direct HARQ feedback; or,

[0279] The PUCCH resources are obtained by mapping the third time-frequency resources used for transmitting the DCI.

[0280] Optionally, the receiving module 430 is further configured to receive direct HARQ feedback information fed back by the second terminal via the PSFCH in the second time-frequency resource.

[0281] Optionally, the second time-frequency resource includes:

[0282] The pre-configured second terminal sends a PSFCH resource used for direct HARQ feedback to the first terminal; or,

[0283] The second terminal obtains a PSFCH resource by mapping the fourth time-frequency resource used for transmitting the direct connection data; or

[0284] The second terminal obtains a PSFCH resource by mapping the first time-frequency resource used by the first terminal to report the direct HARQ feedback information; or

[0285] The first terminal or the second terminal configures the PSFCH resources according to the first time-frequency resources and the preset timing relationship.

[0286] Optionally, the device further includes:

[0287] The processing module 420 is configured to determine a data transmission parameter indicated by the access network device in an explicit manner or an implicit manner, where the data transmission parameter is used to indicate the first time-frequency resource and / or the second time-frequency resource.

[0288] Optionally, the DCI carries data transmission parameters for indicating the first time-frequency resource and the second time-frequency resource;

[0289] The sending module 410 is further configured to send a data transmission parameter indicating the second time-frequency resource to the second terminal.

[0290] Optionally, the data transmission parameter includes at least one of the following parameters:

[0291] A first physical resource indication, where the first physical resource indication is used to indicate a time domain and / or frequency domain resource used by the first terminal to report direct HARQ feedback information;

[0292] A first feedback timing indication, where the first feedback timing indication is used to indicate a time interval between direct connection data transmission and reporting of corresponding direct connection HARQ feedback information by the first terminal;

[0293] A second physical resource indication, where the second physical resource indication is used to indicate a time domain and / or frequency domain resource used by the second terminal to send direct HARQ feedback information;

[0294] The second feedback timing indication is used to indicate the time interval between the direct connection data transmission and the direct connection HARQ feedback information corresponding to the feedback of the second terminal.

[0295] Optionally, the device further comprises:

[0296] The receiving module 430 is further configured to receive a first configuration signaling sent by the access network device, where the first configuration signaling is used to indicate a PUCCH resource set and / or a first time interval set corresponding to the direct HARQ feedback information;

[0297] The PUCCH resource set includes multiple PUCCH resources configured for reporting direct HARQ feedback information, and the first time interval set includes the time interval between the configured direct data transmission and the first terminal reporting the corresponding direct HARQ feedback information.

[0298] Optionally, the first configuration signaling is a first radio resource control RRC signaling, and the first RRC signaling includes a first newly added field and a second newly added field, the first newly added field is used to indicate a PUCCH resource set, and the second newly added field is used to indicate a first time interval set.

[0299] Optionally, the receiving module 430 is further configured to receive a second configuration signaling sent by the access network device, where the second configuration signaling is used to indicate a PSFCH resource set and / or a second time interval set corresponding to the direct HARQ feedback information;

[0300] The PSFCH resource set includes multiple PSFCH resources configured for reporting direct HARQ feedback information, and the second time interval set includes the time interval between the configured direct data transmission and the direct HARQ feedback information corresponding to the second terminal feedback.

[0301] Optionally, the second configuration signaling is a second radio resource control RRC signaling, and the second RRC signaling includes a third newly added field and a fourth newly added field, the third newly added field is used to indicate a PSFCH resource set, and the fourth newly added field is used to indicate a second time interval set.

[0302] To summarize, in this embodiment, the first terminal sends direct data to the second terminal through a direct link; receives direct HARQ feedback information fed back by the second terminal, where the direct HARQ feedback information is used to indicate the receiving status corresponding to the direct data; reports the direct HARQ feedback information to the access network device; in a direct communication scenario based on access network device scheduling, even if the first terminal and the second terminal may be under the coverage of different access network devices, or are outside the network coverage, the direct HARQ feedback information can be first transmitted from the second terminal to the first terminal, and then reported to the access network device by the first terminal, thereby ensuring the success rate of information sending and receiving in the direct communication scenario, and helping to improve the efficiency of data transmission.

[0303] Figure 5 1 is a block diagram of a data transmission device for direct communication according to an exemplary embodiment. The device has the function of implementing the method example on the access network device side, and the function can be implemented by hardware or by executing corresponding software through hardware. The device 500 may include: a sending module 510 and a receiving module 520.

[0304] The sending module 510 is configured to send a DCI to the first terminal, where the DCI is used to instruct the first terminal to send direct connection data to the second terminal through the direct connection link; receive direct connection HARQ feedback information fed back by the second terminal, where the direct connection HARQ feedback information is used to indicate a receiving state corresponding to the direct connection data; and report the direct connection HARQ feedback information to the access network device;

[0305] The receiving module 520 is configured to receive the direct connection HARQ feedback information reported by the first terminal.

[0306] Optionally, the receiving module 520 is further configured to receive direct HARQ feedback information sent by the first terminal via the PUCCH in the first time-frequency resource.

[0307] Optionally, the first time-frequency resource includes:

[0308] A preconfigured PUCCH resource for transmitting uplink HARQ feedback information for downlink data; or,

[0309] The pre-configured first terminal reports the PUCCH resources used for direct HARQ feedback; or,

[0310] The PUCCH resources are obtained by mapping the third time-frequency resources used for transmitting the DCI.

[0311] Optionally, the device further includes:

[0312] The sending module 510 is further configured to indicate a data transmission parameter to the first terminal in an explicit manner or an implicit manner, where the data transmission parameter is used to indicate the first time-frequency resource and / or the second time-frequency resource.

[0313] Optionally, the DCI carries data transmission parameters for indicating the first time-frequency resource and the second time-frequency resource, and the DCI is used to instruct the first terminal to send data transmission parameters for indicating the second time-frequency resource to the second terminal.

[0314] Optionally, the second time-frequency resource includes:

[0315] The pre-configured second terminal sends a PSFCH resource used for direct HARQ feedback to the first terminal; or,

[0316] The second terminal obtains a PSFCH resource by mapping the fourth time-frequency resource used for transmitting the direct connection data; or

[0317] The second terminal obtains a PSFCH resource by mapping the first time-frequency resource used by the first terminal to report the direct HARQ feedback information; or

[0318] The first terminal or the second terminal configures the PSFCH resources according to the first time-frequency resources and the preset timing relationship.

[0319] Optionally, the data transmission parameter includes at least one of the following parameters:

[0320] A first physical resource indication, where the first physical resource indication is used to indicate a time domain and / or frequency domain resource used by the first terminal to report direct HARQ feedback information;

[0321] A first feedback timing indication, where the first feedback timing indication is used to indicate a time interval between direct connection data transmission and reporting of corresponding direct connection HARQ feedback information by the first terminal;

[0322] A second physical resource indication, where the second physical resource indication is used to indicate a time domain and / or frequency domain resource used by the second terminal to send direct HARQ feedback information;

[0323] The second feedback timing indication is used to indicate the time interval between the direct connection data transmission and the direct connection HARQ feedback information corresponding to the feedback of the second terminal.

[0324] Optionally, the device further comprises:

[0325] The sending module 510 is further configured to send a first configuration signaling to the first terminal, where the first configuration signaling is used to indicate a PUCCH resource set and / or a first time interval set corresponding to the direct HARQ feedback information;

[0326] The PUCCH resource set includes multiple PUCCH resources configured for reporting direct HARQ feedback information, and the first time interval set includes the time interval between the configured direct data transmission and the first terminal reporting the corresponding direct HARQ feedback information.

[0327] Optionally, the first configuration signaling is a first radio resource control RRC signaling, and the first RRC signaling includes a first newly added field and a second newly added field, the first newly added field is used to indicate a PUCCH resource set, and the second newly added field is used to indicate a first time interval set.

[0328] Optionally, the device further comprises:

[0329] The sending module 510 is further configured to send a second configuration signaling to the first terminal and / or the second terminal, where the second configuration signaling is used to indicate a PSFCH resource set and / or a second time interval set corresponding to the direct HARQ feedback information;

[0330] The PSFCH resource set includes multiple PSFCH resources configured for reporting direct HARQ feedback information, and the second time interval set includes the time interval between the configured direct data transmission and the direct HARQ feedback information corresponding to the second terminal feedback.

[0331] Optionally, the second configuration signaling is a second radio resource control RRC signaling, and the second RRC signaling includes a third newly added field and a fourth newly added field, the third newly added field is used to indicate a PSFCH resource set, and the fourth newly added field is used to indicate a second time interval set.

[0332] One point that needs to be explained is that the device provided in the above embodiment only uses the division of the above-mentioned functional modules as an example to implement its functions. In actual applications, the above-mentioned functions can be assigned to different functional modules according to actual needs, that is, the content structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0333] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0334] The above mainly introduces the solution provided by the embodiment of the present disclosure from the perspective of the interaction between the access network device, the first terminal and the second terminal. It can be understood that in order to realize the above functions, the device (including the access network device, the first terminal and the second terminal) includes a hardware structure and / or software module corresponding to each function. In combination with the units and algorithm steps of each example described in the embodiment disclosed in the present disclosure, the embodiment of the present disclosure can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the technical solution of the embodiment of the present disclosure.

[0335] Figure 6 6 is a block diagram of a terminal 600 according to an exemplary embodiment. For example, the terminal 600 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.

[0336] Reference Figure 6 The terminal 600 may include one or more of the following components: a processing component 602 , a memory 604 , a power component 606 , a multimedia component 608 , an audio component 610 , an input / output (I / O) interface 612 , a sensor component 614 , and a communication component 616 .

[0337] The processing component 602 generally controls the overall operation of the terminal 600, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 602 may include one or more processors 620 to execute instructions to complete all or part of the steps of the above-mentioned method. In addition, the processing component 602 may include one or more modules to facilitate the interaction between the processing component 602 and other components. For example, the processing component 602 may include a multimedia module to facilitate the interaction between the multimedia component 608 and the processing component 602.

[0338] The memory 604 is configured to store various types of data to support operations on the device 600. Examples of such data include instructions for any application or method operating on the terminal 600, contact data, phone book data, messages, pictures, videos, etc. The memory 604 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

[0339] Power component 606 provides power to various components of terminal 600. Power component 606 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to terminal 600.

[0340] The multimedia component 608 includes a screen that provides an output interface between the terminal 600 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 608 includes a front camera and / or a rear camera. When the device 600 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera may receive external multimedia data. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

[0341] The audio component 610 is configured to output and / or input audio signals. For example, the audio component 610 includes a microphone (MIC), and when the terminal 600 is in an operation mode, such as a call mode, a recording mode, and a speech recognition mode, the microphone is configured to receive an external audio signal. The received audio signal can be further stored in the memory 604 or sent via the communication component 616. In some embodiments, the audio component 610 also includes a speaker for outputting audio signals.

[0342] I / O interface 612 provides an interface between processing component 602 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include but are not limited to: a home button, a volume button, a start button, and a lock button.

[0343] The sensor assembly 614 includes one or more sensors for providing various aspects of status assessment for the terminal 600. For example, the sensor assembly 614 can detect the open / closed state of the device 600, the relative positioning of the components, such as the display and keypad of the terminal 600, and the sensor assembly 614 can also detect the position change of the terminal 600 or a component of the terminal 600, the presence or absence of contact between the user and the terminal 600, the orientation or acceleration / deceleration of the terminal 600, and the temperature change of the terminal 600. The sensor assembly 614 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 614 may also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 614 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0344] The communication component 616 is configured to facilitate the communication between the terminal 600 and other devices in a wired or wireless manner. The terminal 600 can access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 616 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 616 also includes a near field communication (NFC) module to facilitate short-range communication.

[0345] In an exemplary embodiment, terminal 600 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the above methods.

[0346] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 604 including instructions, and the instructions can be executed by a processor 620 of a terminal 600 to perform the above method. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0347] A non-transitory computer-readable storage medium, when instructions in the non-transitory computer storage medium are executed by a processor of a first terminal, enables the first terminal to execute the above-mentioned data transmission method.

[0348] Figure 7 It is a block diagram of an access network device 700 according to an exemplary embodiment.

[0349] The access network device 700 may include: a processor 701, a receiver 702, a transmitter 703 and a memory 704. The receiver 702, the transmitter 703 and the memory 704 are connected to the processor 701 via a bus respectively.

[0350] The processor 701 includes one or more processing cores, and the processor 701 executes the method performed by the access network device in the transmission configuration method provided in the embodiment of the present disclosure by running software programs and modules. The memory 704 can be used to store software programs and modules. Specifically, the memory 704 can store an operating system 7041 and an application module 7042 required for at least one function. The receiver 702 is used to receive communication data sent by other devices, and the transmitter 703 is used to send communication data to other devices.

[0351] An exemplary embodiment of the present disclosure further provides a data transmission system for direct communication, the data transmission system comprising a terminal and an access network device;

[0352] The terminal is as Figure 4 The data transmission device provided by the illustrated embodiment;

[0353] The access network is as follows Figure 5 The illustrated embodiment provides a data transmission device.

[0354] An exemplary embodiment of the present disclosure further provides a data transmission system for direct communication, the data transmission system comprising a terminal and an access network device;

[0355] The terminal is as follows Figure 6 The terminal provided by the illustrated embodiment;

[0356] The access network is as follows Figure 7 The illustrated embodiment provides an access network device.

[0357] An exemplary embodiment of the present disclosure also provides a computer-readable storage medium, in which at least one instruction, at least one program, a code set or an instruction set is stored. The at least one instruction, the at least one program, the code set or the instruction set is loaded and executed by the processor to implement the steps performed by the first terminal or the access network device in the data transmission method of direct communication provided by the above-mentioned various method embodiments.

[0358] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0359] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A data transmission method for direct communication, It is characterized in that The method is performed by a first terminal, the direct communication is a communication scenario in which the first terminal performs direct data transmission based on scheduling of an access network device, and the method includes: Receiving downlink control information DCI sent by the access network device, where the DCI carries data transmission parameters, where the data transmission parameters are used to indicate direct feedback channel PSFCH resources and / or physical uplink control channel PUCCH resources; Sending direct connection data to the second terminal through the direct connection link according to the DCI; receiving direct hybrid automatic repeat request HARQ feedback information fed back by the second terminal through the PSFCH in the PSFCH resource, where the direct HARQ feedback information is used to indicate a reception status corresponding to the direct data, and the PSFCH resource is obtained by the second terminal according to the time-frequency resource mapping used for transmitting the direct data; The direct HARQ feedback information is reported to the access network device in the PUCCH resource via the PUCCH, and the PUCCH resource is obtained by mapping the time-frequency resources used for transmitting the DCI.

2. The method according to claim 1, It is characterized in that The data transmission parameter includes a first feedback timing indication, and the PUCCH resource further includes: The time-frequency resources are determined based on the first feedback timing indication, wherein the first feedback timing indication is used to indicate a time interval between direct data transmission and reporting of corresponding direct HARQ feedback information by the first terminal.

3. The method according to claim 1, It is characterized in that The data transmission parameter includes a first physical resource indication, and the PUCCH resource further includes: The time-frequency resources determined based on the first physical resource indication, wherein the first physical resource indication is used to indicate the time domain and / or frequency domain resources used by the first terminal to report the direct HARQ feedback information.

4. The method according to claim 1, It is characterized in that The PSFCH resources also include: The pre-configured PSFCH resource used by the second terminal to send the direct HARQ feedback information to the first terminal; or, The second terminal obtains a PSFCH resource according to the time-frequency resource mapping used by the first terminal to report the direct HARQ feedback information; or The first terminal or the second terminal configures the PSFCH resources according to the PUCCH resources and a preset timing relationship.

5. The method according to any one of claims 1 to 4, It is characterized in that The method further comprises: A data transmission parameter indicating the PSFCH resource is sent to the second terminal.

6. The method according to any one of claims 1 to 4, It is characterized in that The data transmission parameters include at least one of the following parameters: A first physical resource indication, where the first physical resource indication is used to indicate a time domain and / or frequency domain resource used by the first terminal to report the direct HARQ feedback information; a first feedback timing indication, where the first feedback timing indication is used to indicate a time interval between the direct connection data transmission and the first terminal reporting the corresponding direct connection HARQ feedback information; A second physical resource indication, where the second physical resource indication is used to indicate a time domain and / or frequency domain resource used by the second terminal to send the direct HARQ feedback information; The second feedback timing indication is used to indicate the time interval between the direct data transmission and the direct HARQ feedback information corresponding to the feedback of the second terminal.

7. The method according to any one of claims 1 to 4, It is characterized in that The method further comprises: receiving a first configuration signaling sent by the access network device, where the first configuration signaling is used to indicate a PUCCH resource set and / or a first time interval set corresponding to the direct HARQ feedback information; The PUCCH resource set includes multiple PUCCH resources configured for reporting the direct HARQ feedback information, and the first time interval set includes the time interval between the configured direct data transmission and the first terminal reporting the corresponding direct HARQ feedback information.

8. The method according to claim 7, It is characterized in that The first configuration signaling is a first radio resource control RRC signaling, and the first RRC signaling includes a first newly added field and a second newly added field. The first newly added field is used to indicate the PUCCH resource set, and the second newly added field is used to indicate the first time interval set.

9. The method according to any one of claims 1 to 4, It is characterized in that The method further comprises: receiving a second configuration signaling sent by the access network device, where the second configuration signaling is used to indicate a PSFCH resource set and / or a second time interval set corresponding to the direct HARQ feedback information; The PSFCH resource set includes multiple PSFCH resources configured for reporting the direct connection HARQ feedback information, and the second time interval set includes the time interval between the configured direct connection data transmission and the direct connection HARQ feedback information corresponding to the second terminal feedback.

10. The method according to claim 9, It is characterized in that The second configuration signaling is a second radio resource control RRC signaling, and the second RRC signaling includes a third newly added field and a fourth newly added field, the third newly added field is used to indicate the PSFCH resource set, and the fourth newly added field is used to indicate the second time interval set.

11. A data transmission method for direct communication, It is characterized in that The method is performed by an access network device, the direct communication is a communication scenario in which a first terminal performs direct data transmission based on scheduling by the access network device, and the method includes: Sending downlink control information DCI to the first terminal, where the DCI is used to instruct the first terminal to send direct connection data to the second terminal through a direct connection link, and the DCI carries data transmission parameters, where the data transmission parameters are used to indicate direct feedback channel PSFCH resources and / or physical uplink control channel PUCCH resources; receiving direct hybrid automatic repeat request HARQ feedback information sent by the first terminal through the PUCCH in the PUCCH resource, where the direct HARQ feedback information is used to indicate a reception status corresponding to the direct data; Among them, the PUCCH resources are obtained by mapping the time-frequency resources used to transmit the DCI, the direct connection HARQ feedback information is fed back to the first terminal by the second terminal through PSFCH in the PSFCH resources, and the PSFCH resources are obtained by the second terminal according to the time-frequency resource mapping used to transmit the direct connection data.

12. The method according to claim 11, It is characterized in that The data transmission parameter includes a first feedback timing indication, and the PUCCH resource further includes: The time-frequency resources are determined based on the first feedback timing indication, wherein the first feedback timing indication is used to indicate a time interval between direct data transmission and reporting of corresponding direct HARQ feedback information by the first terminal.

13. The method according to claim 11, It is characterized in that The data transmission parameter includes a first physical resource indication, and the PUCCH resource further includes: The time-frequency resources determined based on the first physical resource indication, wherein the first physical resource indication is used to indicate the time domain and / or frequency domain resources used by the first terminal to report the direct HARQ feedback information.

14. The method according to any one of claims 11 to 13, It is characterized in that The DCI is also used to instruct the first terminal to send data transmission parameters indicating the PSFCH resources to the second terminal.

15. The method according to any one of claims 11 to 13, It is characterized in that The PSFCH resources include: The pre-configured PSFCH resource used by the second terminal to send the direct HARQ feedback information to the first terminal; or, The second terminal obtains a PSFCH resource according to the time-frequency resource mapping used by the first terminal to report the direct HARQ feedback information; or The first terminal or the second terminal configures the PSFCH resources according to the PUCCH resources and a preset timing relationship.

16. The method according to any one of claims 11 to 13, It is characterized in that The data transmission parameters include at least one of the following parameters: A first physical resource indication, where the first physical resource indication is used to indicate a time domain and / or frequency domain resource used by the first terminal to report the direct HARQ feedback information; a first feedback timing indication, where the first feedback timing indication is used to indicate a time interval between the direct connection data transmission and the first terminal reporting the corresponding direct connection HARQ feedback information; A second physical resource indication, where the second physical resource indication is used to indicate a time domain and / or frequency domain resource used by the second terminal to send the direct HARQ feedback information; The second feedback timing indication is used to indicate the time interval between the direct data transmission and the direct HARQ feedback information corresponding to the feedback of the second terminal.

17. The method according to any one of claims 11 to 13, It is characterized in that The method further comprises: Sending a first configuration signaling to the first terminal, where the first configuration signaling is used to indicate a PUCCH resource set and / or a first time interval set corresponding to the direct HARQ feedback information; The PUCCH resource set includes multiple PUCCH resources configured for reporting the direct HARQ feedback information, and the first time interval set includes the time interval between the configured direct data transmission and the first terminal reporting the corresponding direct HARQ feedback information.

18. The method according to claim 17, It is characterized in that The first configuration signaling is a first radio resource control RRC signaling, and the first RRC signaling includes a first newly added field and a second newly added field. The first newly added field is used to indicate the PUCCH resource set, and the second newly added field is used to indicate the first time interval set.

19. The method according to any one of claims 11 to 13, It is characterized in that The method further comprises: Sending a second configuration signaling to the first terminal and / or the second terminal, where the second configuration signaling is used to indicate a PSFCH resource set and / or a second time interval set corresponding to the direct HARQ feedback information; The PSFCH resource set includes multiple PSFCH resources configured for reporting the direct connection HARQ feedback information, and the second time interval set includes the time interval between the configured direct connection data transmission and the direct connection HARQ feedback information corresponding to the second terminal feedback.

20. The method according to claim 19, It is characterized in that The second configuration signaling is a second radio resource control RRC signaling, and the second RRC signaling includes a third newly added field and a fourth newly added field, the third newly added field is used to indicate the PSFCH resource set, and the fourth newly added field is used to indicate the second time interval set.

21. A data transmission device for direct communication, It is characterized in that Used in a first terminal, the direct communication is a communication scenario in which the first terminal performs direct data transmission based on scheduling of an access network device, and the device includes: A receiving module, configured to receive downlink control information DCI sent by the access network device, wherein the DCI carries data transmission parameters, and the data transmission parameters are used to indicate direct feedback channel PSFCH resources and / or physical uplink control channel PUCCH resources; a sending module, configured to send direct connection data to the second terminal through a direct connection link according to the DCI; The receiving module is further configured to receive direct hybrid automatic repeat request HARQ feedback information fed back by the second terminal through the PSFCH in the PSFCH resource, wherein the direct HARQ feedback information is used to indicate a receiving state corresponding to the direct data, and the PSFCH resource is obtained by the second terminal according to the time-frequency resource mapping used to transmit the direct data; The sending module is further configured to report the direct connection HARQ feedback information to the access network device in the PUCCH resource via PUCCH, and the PUCCH resource is obtained according to the time-frequency resource mapping used for transmitting the DCI.

22. The device according to claim 21, It is characterized in that The data transmission parameter includes a first feedback timing indication, and the PUCCH resource further includes: The time-frequency resources are determined based on the first feedback timing indication, wherein the first feedback timing indication is used to indicate a time interval between direct data transmission and reporting of corresponding direct HARQ feedback information by the first terminal.

23. The device according to claim 21, It is characterized in that The data transmission parameter includes a first physical resource indication, and the PUCCH resource further includes: The time-frequency resources determined based on the first physical resource indication, wherein the first physical resource indication is used to indicate the time domain and / or frequency domain resources used by the first terminal to report the direct HARQ feedback information.

24. The device according to claim 21, It is characterized in that The PSFCH resources also include: The pre-configured PSFCH resource used by the second terminal to send the direct HARQ feedback information to the first terminal; or, The second terminal obtains a PSFCH resource according to the time-frequency resource mapping used by the first terminal to report the direct HARQ feedback information; or The first terminal or the second terminal configures the PSFCH resources according to the PUCCH resources and a preset timing relationship.

25. The device according to any one of claims 21 to 24, It is characterized in that The sending module is further configured to send a data transmission parameter indicating the PSFCH resource to the second terminal.

26. The device according to any one of claims 21 to 24, It is characterized in that The data transmission parameters include at least one of the following parameters: A first physical resource indication, where the first physical resource indication is used to indicate a time domain and / or frequency domain resource used by the first terminal to report the direct HARQ feedback information; a first feedback timing indication, where the first feedback timing indication is used to indicate a time interval between the direct connection data transmission and the first terminal reporting the corresponding direct connection HARQ feedback information; A second physical resource indication, where the second physical resource indication is used to indicate a time domain and / or frequency domain resource used by the second terminal to send the direct HARQ feedback information; The second feedback timing indication is used to indicate the time interval between the direct data transmission and the direct HARQ feedback information corresponding to the feedback of the second terminal.

27. The device according to any one of claims 21 to 24, It is characterized in that The receiving module is further configured to receive a first configuration signaling sent by the access network device, where the first configuration signaling is used to indicate a PUCCH resource set and / or a first time interval set corresponding to the direct HARQ feedback information; The PUCCH resource set includes multiple PUCCH resources configured for reporting the direct HARQ feedback information, and the first time interval set includes the time interval between the configured direct data transmission and the first terminal reporting the corresponding direct HARQ feedback information.

28. The device according to claim 27, It is characterized in that The first configuration signaling is a first radio resource control RRC signaling, and the first RRC signaling includes a first newly added field and a second newly added field. The first newly added field is used to indicate the PUCCH resource set, and the second newly added field is used to indicate the first time interval set.

29. The device according to any one of claims 21 to 24, It is characterized in that The receiving module is further configured to receive a second configuration signaling sent by the access network device, where the second configuration signaling is used to indicate a PSFCH resource set and / or a second time interval set corresponding to the direct HARQ feedback information; The PSFCH resource set includes multiple PSFCH resources configured for reporting the direct connection HARQ feedback information, and the second time interval set includes the time interval between the configured direct connection data transmission and the direct connection HARQ feedback information corresponding to the second terminal feedback.

30. The device according to claim 29, It is characterized in that The second configuration signaling is a second radio resource control RRC signaling, and the second RRC signaling includes a third newly added field and a fourth newly added field, the third newly added field is used to indicate the PSFCH resource set, and the fourth newly added field is used to indicate the second time interval set.

31. A data transmission device for direct communication, It is characterized in that Used in an access network device, the direct communication is a communication scenario in which a first terminal performs direct data transmission based on scheduling of the access network device, and the device includes: a sending module, configured to send downlink control information DCI to the first terminal, where the DCI is used to instruct the first terminal to send direct connection data to the second terminal through a direct connection link, and the DCI carries data transmission parameters, where the data transmission parameters are used to indicate direct feedback channel PSFCH resources and / or physical uplink control channel PUCCH resources; A receiving module, configured to receive direct hybrid automatic repeat request HARQ feedback information sent by the first terminal in the PUCCH resource through the PUCCH, where the direct HARQ feedback information is used to indicate a receiving state corresponding to the direct data; Among them, the PUCCH resources are obtained by mapping the time-frequency resources used to transmit the DCI, the direct connection HARQ feedback information is fed back to the first terminal by the second terminal through PSFCH in the PSFCH resources, and the PSFCH resources are obtained by the second terminal according to the time-frequency resource mapping used to transmit the direct connection data.

32. The device according to claim 31, It is characterized in that The data transmission parameter includes a first feedback timing indication, and the PUCCH resource further includes: The time-frequency resources are determined based on the first feedback timing indication, wherein the first feedback timing indication is used to indicate a time interval between direct data transmission and reporting of corresponding direct HARQ feedback information by the first terminal.

33. The device according to claim 31, It is characterized in that The data transmission parameter includes a first physical resource indication, and the PUCCH resource further includes: The time-frequency resources determined based on the first physical resource indication, wherein the first physical resource indication is used to indicate the time domain and / or frequency domain resources used by the first terminal to report the direct HARQ feedback information.

34. The device according to any one of claims 31 to 33, It is characterized in that The DCI is also used to instruct the first terminal to send data transmission parameters indicating the PSFCH resources to the second terminal.

35. The device according to any one of claims 31 to 33, It is characterized in that The PSFCH resources include: The pre-configured PSFCH resource used by the second terminal to send the direct HARQ feedback information to the first terminal; or, The second terminal obtains a PSFCH resource according to the time-frequency resource mapping used by the first terminal to report the direct HARQ feedback information; or The first terminal or the second terminal configures the PSFCH resources according to the PUCCH resources and a preset timing relationship.

36. The device according to any one of claims 31 to 33, It is characterized in that The data transmission parameters include at least one of the following parameters: A first physical resource indication, where the first physical resource indication is used to indicate a time domain and / or frequency domain resource used by the first terminal to report the direct HARQ feedback information; a first feedback timing indication, where the first feedback timing indication is used to indicate a time interval between the direct connection data transmission and the first terminal reporting the corresponding direct connection HARQ feedback information; A second physical resource indication, where the second physical resource indication is used to indicate a time domain and / or frequency domain resource used by the second terminal to send the direct HARQ feedback information; The second feedback timing indication is used to indicate the time interval between the direct data transmission and the direct HARQ feedback information corresponding to the feedback of the second terminal.

37. The device according to any one of claims 31 to 33, It is characterized in that The sending module is further configured to send a first configuration signaling to the first terminal, where the first configuration signaling is used to indicate a PUCCH resource set and / or a first time interval set corresponding to the direct HARQ feedback information; The PUCCH resource set includes multiple PUCCH resources configured for reporting the direct HARQ feedback information, and the first time interval set includes the time interval between the configured direct data transmission and the first terminal reporting the corresponding direct HARQ feedback information.

38. The device according to claim 37, It is characterized in that The first configuration signaling is a first radio resource control RRC signaling, and the first RRC signaling includes a first newly added field and a second newly added field. The first newly added field is used to indicate the PUCCH resource set, and the second newly added field is used to indicate the first time interval set.

39. The device according to any one of claims 31 to 33, It is characterized in that The sending module is further configured to send a second configuration signaling to the first terminal and / or the second terminal, where the second configuration signaling is used to indicate a PSFCH resource set and / or a second time interval set corresponding to the direct HARQ feedback information; The PSFCH resource set includes multiple PSFCH resources configured for reporting the direct connection HARQ feedback information, and the second time interval set includes the time interval between the configured direct connection data transmission and the direct connection HARQ feedback information corresponding to the second terminal feedback.

40. The device according to claim 39, It is characterized in that The second configuration signaling is a second radio resource control RRC signaling, and the second RRC signaling includes a third newly added field and a fourth newly added field, the third newly added field is used to indicate the PSFCH resource set, and the fourth newly added field is used to indicate the second time interval set.

41. A terminal, It is characterized in that The terminal comprises: processor; a transceiver connected to the processor; a memory for storing processor-executable instructions; The processor is configured to load and execute the executable instructions to implement the data transmission method for direct connection communication as described in any one of claims 1 to 10.

42. An access network device, It is characterized in that The access network equipment includes: processor; a transceiver connected to the processor; a memory for storing processor-executable instructions; The processor is configured to load and execute the executable instructions to implement the data transmission method for direct connection communication as described in any one of claims 11 to 20.

43. A data transmission system for direct communication, It is characterized in that The data transmission system includes a terminal and access network equipment; The terminal is a data transmission device as claimed in any one of claims 21 to 30; The access network device is a data transmission device as described in any one of claims 31 to 40.

44. A data transmission system for direct communication, It is characterized in that The data transmission system includes a terminal and access network equipment; The terminal is a terminal as claimed in claim 41; The access network device is the access network device as described in claim 42.

45. A computer readable storage medium, It is characterized in that The computer-readable storage medium stores at least one instruction, and the at least one instruction is loaded and executed by the processor to implement the data transmission method of direct communication according to any one of claims 1 to 20.

Images