CN112311511B

CN112311511B - Data transmission method and device

Info

Publication number: CN112311511B
Application number: CN201910682820.6A
Authority: CN
Inventors: 刘荣宽; 张鹏; 马驰翔
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-07-26
Filing date: 2019-07-26
Publication date: 2023-06-06
Anticipated expiration: 2039-07-26
Also published as: WO2021017611A1; WO2021017611A9; CN112311511A

Abstract

The data transmission method and device can save signaling overhead of uplink cooperative transmission, reduce data transmission delay, and can be applied to the Internet of vehicles, such as V2X, LTE-V, V2V and the like. The method comprises the following steps: the second terminal equipment sends a first data packet to the first terminal equipment on the resources in the first resource pool; the first terminal equipment receives the first data packet and determines that the first data packet needs to be forwarded to network equipment; the first terminal equipment forwards the first data packet to the network equipment on the resources in the second resource pool, and the network equipment receives the first data packet and determines that the first data packet is forwarded by the first terminal equipment; the first resource pool is used for transmitting the data packet to the cooperative terminal equipment by the source terminal equipment in the uplink cooperative transmission, and the second resource pool is used for forwarding the data packet transmitted by the source terminal equipment to the network equipment by the cooperative terminal equipment.

Description

Data transmission method and device

Technical Field

The present invention relates to the field of communications, and in particular, to a data transmission method and apparatus in the field of communications.

Background

Wireless communication technology has experienced rapid development in the past decades, has successively experienced first generation wireless communication systems based on analog communication systems, 2G wireless communication systems represented by global system for mobile communications (global system for mobile communication, GSM), 3G wireless communication systems represented by wideband code division multiple access (wideband code division multiple access, WCDMA), and has been reproduced to long term evolution (long term evolution, LTE) 4G wireless communication systems which have been widely commercially available and have achieved great success worldwide. Services supported by wireless communication systems have also evolved from initial voice, short messages, to now supporting wireless high-speed data communications. At the same time, the number of wireless connections worldwide is experiencing a continuously high growth, and various new wireless service types are also emerging, such as internet of things, autopilot, etc., which are all placing higher demands on next generation wireless communication systems, such as the fifth generation mobile communication technology (the 5th generation wireless systems,5G) system.

The data transmission between the terminal device and the terminal device may be referred to as "sidestream data transmission", and the terminal device as the receiving end may send control information to schedule the terminal device as the transmitting end, where the control information indicates a resource adopted by the terminal device as the transmitting end to transmit the data packet, and the terminal device as the receiving end may send the data packet on the indicated resource according to the control information. Likewise, the terminal device sending data to the network device may be referred to as "uplink data transmission", where the network device may send control information to schedule the terminal device, where the control information indicates resources used by the terminal device to send the data packet, and the terminal device may send the data packet on the indicated resources according to the control information.

User collaboration is one of the main features supported by the next-generation communication system, which can significantly improve the capacity of the system and the coverage of the network, while reducing the load of network devices. User cooperative transmission refers to assisting in uplink or downlink transmission between a source terminal device and a network device through a side uplink between a cooperative terminal device (cooperative user equipment, CUE) and the source terminal device (source user equipment, SUE). There is no method for implementing uplink data transmission in a user cooperation manner (hereinafter, simply referred to as uplink cooperative transmission).

Disclosure of Invention

The application provides a data transmission method and device, which can distinguish between uplink cooperative transmission resources and lateral data transmission resources and uplink data transmission resources, so that terminal equipment and network equipment can directly adopt the resources corresponding to a transmission mode to carry out uplink cooperative transmission without scheduling signaling, signaling overhead can be saved, and data transmission time delay is reduced.

In a first aspect, a data transmission method is provided, including: the method comprises the steps that a first terminal device receives a first data packet from a second terminal device on resources in a first resource pool, wherein the first resource pool is used for transmitting the data packet to a cooperative terminal device by a source terminal device in uplink cooperative transmission, the first terminal device is the cooperative terminal device, and the second terminal device is the source terminal device; the first terminal equipment receives the first data packet according to the resources in the first resource pool, and determines that the first data packet needs to be forwarded to network equipment; the first terminal device forwards the first data packet to the network device on resources in a second resource pool, wherein the second resource pool is used for forwarding the data packet sent by the source terminal device to the network device by the cooperative terminal device.

In the data transmission method of the embodiment of the invention, in the uplink cooperative transmission process, the source terminal device, the cooperative terminal device and the network device all adopt resources in a resource pool special for uplink cooperative transmission to perform data transmission, so that the cooperative terminal device can distinguish the uplink cooperative transmission resources from the side link transmission resources, and the network device can distinguish the resources forwarded by the cooperative terminal device and the resources sent to the network device by the terminal device, so that the terminal device and the network device can directly perform uplink cooperative transmission by adopting the resources corresponding to the transmission mode, without scheduling signaling, signaling overhead can be saved, and data transmission delay can be reduced.

In the embodiment of the present application, the first stage of data transmission of uplink cooperative transmission (that is, the second terminal device sends the first data packet to the first terminal device) adopts resources in the first resource pool, and the second terminal device and the first terminal device need to acquire the first resource pool in advance. The second stage of data transmission of the uplink cooperative transmission (i.e. the first terminal device forwards the first data packet to the network device) adopts resources in the second resource pool, and the first terminal device and the network device need to pre-select to acquire the second resource pool. The "pre-acquisition" may be defined by a protocol, or may be configured by the network device through signaling for the first terminal device and/or the second terminal device, which is not limited in this embodiment of the present application.

With reference to the first aspect, in certain implementations of the first aspect, before the first terminal device receives the first data packet from the second terminal device on a resource in the first resource pool, the method further includes: the first terminal device receives first information and second information from the network device, wherein the first information is used for configuring the first resource pool, and the second information is used for configuring the second resource pool.

It should be understood that the above-mentioned first information for configuring the first resource pool and the above-mentioned second information for configuring the second resource pool may be sent through two different messages, or may be sent through two different fields in the same message, which is not limited in the embodiment of the present application. The first information and the second information may also be referred to as "first configuration information" and "second configuration information", or "configuration information", or other names, which are not limited in this embodiment.

The first resource pool and the second resource pool can be configured periodically or aperiodically, the network equipment can reasonably allocate the resources in the resource pool according to the actual conditions such as the resource utilization condition and the like, dynamically adjust the resources in the resource pool, flexibly configure the first resource pool and the second resource pool, and is beneficial to improving the resource utilization rate.

Because the first terminal device is a cooperative terminal device, the first terminal device is necessarily located within the coverage area of the network device, and the first terminal device can receive the first information and the second information sent by the network device. However, the second terminal device may not be in the coverage area of the network device, and may not be able to receive the first information sent by the network device. In one possible implementation, the first terminal device may forward the first information received from the network device to the second terminal device, so that the second terminal device determines the first resource pool according to the first information, thereby performing uplink data transmission on the first resource pool.

In the embodiment of the application, for the first terminal device, the network device needs to configure the first resource pool and the second resource pool for the first terminal device through the first information and the second information. But for the second terminal device, the network device may configure the first resource pool for the second terminal device only through the first information, and may also configure the first resource pool and the second resource pool for the second terminal device through the first information and the second information.

With reference to the first aspect, in certain implementations of the first aspect, before the first terminal device receives the first data packet from the second terminal device on a resource in the first resource pool, the method further includes: the first terminal device receives third information from the network device or the second terminal device, where the third information is used to instruct the first terminal device to activate the uplink cooperative transmission.

In the embodiment of the invention, the network equipment can flexibly adjust, the uplink cooperative transmission is activated through the third information when the uplink cooperative transmission is used, and the uplink cooperative transmission is deactivated through the information when the uplink cooperative transmission is not used, so that the terminal equipment and the network equipment serving as the receiving end do not need to distinguish the data of the side data transmission, the uplink data transmission and the uplink cooperative transmission under the condition of the deactivation of the uplink cooperative transmission, the flow is simplified, the burden of the terminal equipment and the network equipment serving as the receiving end is reduced, and the system performance is improved.

For example, after determining to activate the uplink cooperative transmission, the network device may send third information through signaling to instruct the first terminal device to activate the uplink cooperative transmission. The first terminal device may receive the data packet using the resources in the first resource pool and forward the data packet using the resources in the second resource pool when receiving the third information.

The third information may be configured by the network device through signaling, such as RRC signaling or downlink control information (downlink control information, DCI).

With reference to the first aspect, in certain implementations of the first aspect, the third information is received by the first terminal device from the network device; after the first terminal device receives the third information from the network device, the method further comprises: the first terminal equipment sends fourth information to the second terminal equipment, wherein the fourth information is used for indicating the second terminal equipment to activate the uplink cooperative transmission.

For example, after receiving the third information, the first terminal device may send fourth information to the second terminal device, instructing the second terminal device to activate uplink cooperative transmission. The second terminal device may send the data packet using the resources in the first resource pool if the fourth information is received.

It should be appreciated that this method is more suitable for a case where the second terminal device is not in the coverage area of the network device, since the second terminal device is not in the coverage area of the network device, the activation information (e.g. the third information and the fourth information) sent by the network device cannot be received, and in order to ensure that the second terminal device knows that the network device has activated the uplink cooperative transmission, the first terminal device needs to send the fourth information to the second terminal device.

With reference to the first aspect, in certain implementations of the first aspect, before the first terminal device receives the first data packet from the second terminal device on a resource in the first resource pool, the method further includes: the first terminal device receives fifth information from the network device, the fifth information being used to indicate at least one of the following information: the first resources in the first resource pool correspond to the second terminal equipment; or, the second resource in the second resource pool corresponds to the second terminal equipment; or, the demodulation reference signal DMRS of the second terminal device; or, the radio network temporary identifier RNTI of the second terminal device.

The embodiment of the application is suitable for the situation that one cooperative terminal device provides services for a plurality of source terminal devices at the same time. The first terminal device is a cooperating terminal device and the second terminal device is one of a plurality of source terminal devices, in which case the network device (optionally the cooperating terminal device) needs to distinguish from which of the plurality of source terminal devices the received data originates. Therefore, the embodiment of the application configures, for the first terminal device and the second terminal device, resources in the first resource pool, resources in the second resource pool, DMRS of the second terminal device, or RNTI of the second terminal device, which are adopted by the network device, so that the second terminal device adopts the resources, DMRS or RNTI that uniquely identifies the second terminal device to transmit the first data packet, so that the network device (optionally, the cooperative terminal device) determines that the first data packet is from the second terminal device according to the resources, DMRS or RNTI corresponding to the first data packet.

In the embodiment of the application, the cooperative terminal equipment distinguishes different source terminal equipment through resources, which is beneficial to saving space resource overhead or orthogonal code resource overhead; or, the collaborative terminal equipment can distinguish different source terminal equipment by using the DMRS, and different multiple source terminal equipment can send data packets on the same time-frequency resource, so that the frequency spectrum efficiency is higher; or, the cooperative terminal equipment can accurately distinguish different source terminal equipment by utilizing the RNTI. In addition, by the mode of implicitly distinguishing the terminal equipment, signaling overhead can be saved.

It should be appreciated that the RNTI is a cyclic redundancy check (cyclic redundancy check, CRC) used to scramble control information sent by the sender, and the receiver can blindly check the control channel and descramble the control information with the same RNTI. The control information is used for scheduling the transmission of the data packet of the data channel, indicating the resources used by the data packet, and the receiving end receives the data packet according to the control information after descrambling the control information by adopting the RNTI. For convenience of description herein, the first terminal device or the second terminal device transmitting the first data packet corresponding to the control information transmitted by the RNTI-scrambled CRC is referred to as: the first terminal device or the second terminal device sends (or transmits) the first data packet using the RNTI. Correspondingly, the first terminal device or the network device receives the first data packet corresponding to the control information sent by the RNTI-scrambled CRC, and is referred to as: the first terminal device (or network device) receives the first data packet from the second terminal device (or first terminal device) using the RNTI.

With reference to the first aspect, in certain implementation manners of the first aspect, the fifth information is used to indicate that the first resource corresponds to the second terminal device, and the first terminal device receives, on a resource in the first resource pool, a first data packet from the second terminal device, including: the first terminal device receives the first data packet on the first resource; or, the fifth information is used for indicating the DMRS of the second terminal device, and the first terminal device receives the first data packet from the second terminal device on the resources in the first resource pool, including: the first terminal equipment receives the first data packet from the second terminal equipment by adopting the DMRS of the second terminal equipment on the resources in the first resource pool; or, the fifth information is used for indicating an RNTI of the second terminal device, and the first terminal device receives the first data packet from the second terminal device on the resource in the first resource pool, including: the first terminal device receives the first data packet from the second terminal device by using the RNTI of the second terminal device on the first resource.

With reference to the first aspect, in certain implementation manners of the first aspect, the fifth information is used to indicate that the second resource corresponds to the second terminal device, and the forwarding, by the first terminal device, the first data packet to the network device on a resource in the second resource pool includes: the first terminal device forwards the first data packet to the network device on the second resource; or, the fifth information is used to instruct the DMRS of the second terminal device, and the first terminal device forwards the first data packet to the network device on the resources in the second resource pool, including: the first terminal equipment sends the first data packet to the network equipment by adopting the DMRS of the second terminal equipment on the resources in the second resource pool; or, the fifth information is used to indicate an RNTI of the second terminal device, and the first terminal device forwards the first data packet to the network device on the resources in the second resource pool, including: and the first terminal equipment forwards the first data packet to the network equipment by adopting the RNTI of the second terminal equipment on the resources in the second resource pool.

With reference to the first aspect, in certain implementation manners of the first aspect, the first data packet includes sixth information, where the sixth information is used to indicate an identifier of the second terminal device.

The embodiment of the application is suitable for the situation that one cooperative terminal device provides services for a plurality of source terminal devices at the same time. The first terminal device is a cooperating terminal device and the second terminal device is one of a plurality of source terminal devices, in which case the network device (optionally the cooperating terminal device) needs to distinguish from which of the plurality of source terminal devices the received data originates. Therefore, the embodiment of the application carries the identifier of the second terminal device in the first data packet through the second terminal device, so that the network device (optionally, the cooperative terminal device) can determine that the first data packet is from the second terminal device according to the identifier of the second terminal device.

In a second aspect, there is provided another data transmission method, comprising: the second terminal equipment determines a first resource pool, wherein the first resource pool is used for transmitting a data packet to the cooperative terminal equipment by the source terminal equipment in uplink cooperative transmission; the second terminal equipment sends a first data packet to the first terminal equipment on the resources in the first resource pool, wherein the first terminal equipment is the cooperative terminal equipment, and the second terminal equipment is the source terminal equipment.

With reference to the second aspect, in certain implementations of the second aspect, the determining, by the second terminal device, the first resource pool includes: the second terminal device receives first information from a network device or the first terminal device, where the first information is used to configure the first resource pool.

With reference to the second aspect, in certain implementations of the second aspect, before the second terminal device sends the first data packet to the first terminal device on the resources in the first resource pool, the method further includes: the second terminal device receives fourth information from the network device or the first terminal device, where the fourth information is used to instruct the second terminal device to activate the uplink cooperative transmission.

With reference to the second aspect, in certain implementations of the second aspect, the fourth information is received by the second terminal device from the network device, and after the second terminal device receives the fourth information from the network device, the method further includes: and the second terminal equipment sends third information to the first terminal equipment, wherein the third information is used for indicating the first terminal equipment to activate the uplink cooperative transmission.

With reference to the second aspect, in certain implementations of the second aspect, before the second terminal device sends the first data packet to the first terminal device on the resources in the first resource pool, the method further includes: the second terminal device receives fifth information from the network device or the first terminal device, the fifth information being used to indicate at least one of the following information: the first resources in the first resource pool correspond to the second terminal equipment; or, the demodulation reference signal DMRS of the second terminal device; or, the radio network temporary identifier RNTI of the second terminal device.

With reference to the second aspect, in certain implementation manners of the second aspect, the fifth information is used to indicate that the first resource in the first resource pool corresponds to the second terminal device, and the second terminal device sends a first data packet to the first terminal device on the resource in the first resource pool includes: the second terminal device sends the first data packet to the first terminal device on the first resource; or, the fifth information is used to indicate the DMRS of the second terminal device, and the second terminal device sends a first data packet to the first terminal device on the resources in the first resource pool, including: the second terminal equipment transmits the first data packet to the first terminal equipment by adopting the DMRS of the second terminal equipment on the resources in the first resource pool; or, the fifth information is used for indicating an RNTI of the second terminal device, and the second terminal device sends a first data packet to the first terminal device on the resources in the first resource pool, including: and the second terminal equipment sends the first data packet transmitted by adopting the RNTI of the second terminal equipment to the first terminal equipment on the resources in the first resource pool.

With reference to the second aspect, in certain implementations of the second aspect, the first data packet includes sixth information, where the sixth information is used to indicate an identification of the second terminal device.

In a third aspect, another data transmission method is provided, including: the network equipment receives a first data packet from the first terminal equipment on the resource of a second resource pool, wherein the second resource pool is used for forwarding the data packet sent by the source terminal equipment to the network equipment by the cooperative terminal equipment in uplink cooperative transmission, and the first terminal equipment is the cooperative terminal equipment; and the network equipment receives the first data packet from the first terminal equipment on the resources of the second resource pool, and determines that the first data packet is forwarded by the first terminal equipment.

With reference to the third aspect, in certain implementations of the third aspect, before the network device receives the first data packet from the first terminal device on the resources of the second resource pool, the method further includes: the network device sends first information and second information, the first information is used for configuring a first resource pool, the second information is used for configuring a second resource pool, and the first resource pool is used for sending a data packet to the cooperative terminal device by the source terminal device in the uplink cooperative transmission.

With reference to the third aspect, in certain implementations of the third aspect, before the network device receives the first data packet from the first terminal device on the resources of the second resource pool, the method further includes: and the network equipment sends third information to the first terminal equipment, wherein the third information is used for indicating the first terminal equipment to activate the uplink cooperative transmission.

With reference to the third aspect, in certain implementations of the third aspect, the method further includes: the network device sends fourth information to a second terminal device, where the fourth information is used to instruct the second terminal device to activate the uplink cooperative transmission, and the second terminal device is the source terminal device in the uplink cooperative transmission.

With reference to the third aspect, in certain implementations of the third aspect, before the network device receives the first data packet from the first terminal device on a resource of the second resource pool, the method further includes: the network device sends fifth information to the first terminal device and/or the second terminal device, where the second terminal device is the source terminal device in the uplink cooperative transmission, and the fifth information is used to indicate at least one of the following information: the first resources in the first resource pool correspond to the second terminal equipment; or, the second resource of the second resource corresponds to the second terminal device; or, the demodulation reference signal DMRS of the second terminal device; or, the radio network temporary identifier RNTI of the second terminal device.

With reference to the third aspect, in some implementations of the third aspect, the fifth information is used to indicate that the second resource in the second resource pool corresponds to the second terminal device, and the network device receives the first data packet from the first terminal device on the resource in the second resource pool, including: the network device receiving the first data packet from the second terminal device on the second resource from the first terminal device; or, the fifth information is used for indicating the DMRS of the second terminal device, and the network device receives the first data packet from the first terminal device on the resources of the second resource pool, including: the network device receives the first data packet from the second terminal device from the first terminal device by adopting the DMRS of the second terminal device on the resource of the second resource pool; or, the fifth information is used for indicating an RNTI of the second terminal device, and the network device receives the first data packet from the first terminal device on the resource of the second resource pool, including: the network device receives the first data packet transmitted with the RNTI of the second terminal device from the first terminal device on the resources of the second resource pool.

With reference to the third aspect, in some implementations of the third aspect, the first data packet includes sixth information, where the sixth information is used to indicate an identification of the second terminal device.

In a fourth aspect, a data transmission device is provided for performing the above aspects or any of the possible implementation manners of the aspects. In particular, the apparatus comprises means for performing the method in each of the above aspects or any of the possible implementations of each aspect.

In one design, the apparatus may include modules corresponding one to perform the methods/operations/steps/actions described in the above aspects, where the modules may be implemented by hardware circuits, software, or a combination of hardware circuits and software.

In another design, the device is a communication chip that may include an input circuit or interface for transmitting information or data and an output circuit or interface for receiving information or data.

In another design, the apparatus is a communication device that may include a transmitter to transmit information or data and a receiver to receive information or data.

In another design, the apparatus is configured to perform the method in each aspect or any possible implementation manner of each aspect, where the apparatus may be configured in the terminal device or the network device, or the apparatus itself is the terminal device or the network device.

In a fifth aspect, there is provided another data transmission device comprising a processor, a memory for storing a computer program, the processor being adapted to invoke and run the computer program from the memory, such that the communication device performs the method in any of the possible implementations of the above aspect.

Optionally, the processor is one or more, and the memory is one or more.

Alternatively, the memory may be integrated with the processor or the memory may be separate from the processor.

Optionally, the communication device further comprises a transmitter (transmitter) and a receiver (receiver), which may be arranged separately or may be integrated together, referred to as a transceiver (transceiver).

In a sixth aspect, there is provided a data transmission system comprising means for implementing the method of any one of the above-mentioned first or second aspects, means for implementing the method of any one of the above-mentioned second or second aspects, and means for implementing the method of any one of the above-mentioned third or third aspects.

In one possible design, the communication system may further include other devices that interact with the terminal device and/or the network device in the solution provided by the embodiments of the present application.

In a seventh aspect, there is provided a computer program product comprising: a computer program (which may also be referred to as code, or instructions) which, when executed, causes a computer to perform the method of any one of the possible implementations of any one of the aspects.

In an eighth aspect, a computer readable medium is provided, which stores a computer program (which may also be referred to as code, or instructions) which, when run on a computer, causes the computer to perform the method of any one of the possible implementations of the above aspect.

In a ninth aspect, there is provided a communications apparatus, comprising a memory, which may be, for example, a system on a chip, for storing a computer program, and a processor for calling and running the computer program from the memory, such that a communications device in which the communications apparatus is installed performs the method in any one of the possible implementations of the above aspects.

The chip system may include an input circuit or interface for outputting information or data, and an output circuit or interface for reading information or data, among other things. The above-mentioned chip system may be a System On Chip (SOC) or a baseband chip, etc., where the baseband chip may include a processor, a channel encoder, a digital signal processor, a modem, an interface module, etc.

Drawings

Fig. 1 is a schematic diagram of a communication system provided in an embodiment of the present application.

Fig. 2 is a schematic flowchart of a data transmission method provided in an embodiment of the present application.

Fig. 3 is a schematic diagram of a resource pool configuration provided in an embodiment of the present application.

Fig. 4 is a schematic block diagram of a data transmission device provided in an embodiment of the present application.

Fig. 5 is a schematic block diagram of another data transmission apparatus provided in an embodiment of the present application.

Detailed Description

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

The technical solution of the embodiment of the application can be applied to various communication systems, for example: a long term evolution (long term evolution, LTE) system, an LTE frequency division duplex (frequency division duplex, FDD) system, an LTE time division duplex (time division duplex, TDD), a universal mobile telecommunications system (universal mobile telecommunication system, UMTS), a fifth generation (5th generation,5G) system, or a New Radio (NR) or other evolving communication system, etc.

The terminal device in the embodiment of the present application may also be referred to as: a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment, etc.

The terminal device may be a device providing voice/data connectivity to a user, e.g., a handheld device with wireless connectivity, an in-vehicle device, etc. Currently, some examples of terminals are: a mobile phone, tablet, laptop, palmtop, mobile internet device (mobile internet device, MID), wearable device, virtual Reality (VR) device, augmented reality (augmented reality, AR) device, wireless terminal in industrial control (industrial control), wireless terminal in unmanned (self driving), wireless terminal in teleoperation (remote medical surgery), wireless terminal in smart grid (smart grid), wireless terminal in transportation security (transportation safety), wireless terminal in smart city (smart city), wireless terminal in smart home (smart home), cellular phone, cordless phone, session initiation protocol (session initiation protocol, SIP) phone, wireless local loop (wireless local loop, WLL) station, personal digital assistant (personal digital assistant, PDA), handheld device with wireless communication function, public computing device or other processing device connected to wireless modem, vehicle-mounted device, wearable device, terminal device in 5G network or evolving land mobile terminal (public land mobile network), and the like, without limiting the examples of this.

By way of example, and not limitation, in embodiments of the present application, the terminal device may also be a wearable device. The wearable device can also be called as a wearable intelligent device, and is a generic name for intelligently designing daily wear by applying wearable technology and developing wearable devices, such as glasses, gloves, watches, clothes, shoes and the like. The wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also can realize a powerful function through software support, data interaction and cloud interaction. The generalized wearable intelligent device includes full functionality, large size, and may not rely on the smart phone to implement complete or partial functionality, such as: smart watches or smart glasses, etc., and focus on only certain types of application functions, and need to be used in combination with other devices, such as smart phones, for example, various smart bracelets, smart jewelry, etc. for physical sign monitoring.

In addition, in the embodiment of the application, the terminal device may also be a terminal device in an internet of things (internet of things, ioT) system, and the IoT is an important component of future information technology development, and the main technical characteristic of the terminal device is that the article is connected with a network through a communication technology, so that an intelligent network for man-machine interconnection and internet of things interconnection is realized. The terminal device of the present application may also be an in-vehicle module, an in-vehicle component, an in-vehicle chip, or an in-vehicle unit that is built in a vehicle as one or more components or units, and the vehicle may implement the method of the present application through the in-vehicle module, the in-vehicle component, the in-vehicle chip, or the in-vehicle unit. Therefore, the embodiment of the application can be applied to the Internet of vehicles, such as vehicle external connection (vehicle to everything, V2X), long-term evolution technology of workshop communication (long term evolution-vehicle, LTE-V), vehicle-to-vehicle (V2V) and the like.

In addition, the network device in the embodiment of the present application may be a device for communicating with a terminal device, where the network device may also be referred to as an access network device or a radio access network device, may be a transmission receiving point (transmission reception point, TRP), may also be an evolved NodeB (eNB or eNodeB) in an LTE system, may also be a home base station (e.g. home evolved NodeB, or home Node B, HNB), a baseband unit (BBU), and may also be a radio controller in a cloud radio access network (cloud radio access network, CRAN) scenario, or may be a relay station, an access point, a vehicle-mounted device, a wearable device, a network device in a 5G network, or a network device in a PLMN network that evolves in the future, may be an Access Point (AP) in a WLAN, and may be a gNB in a new radio system (new radio, NR), which embodiments of the present application are not limited.

In one network architecture, the network devices may include Centralized Unit (CU) nodes, or Distributed Unit (DU) nodes, or RAN devices including CU nodes and DU nodes, or RAN devices including control plane CU nodes (CU-CP nodes) and user plane CU nodes (CU-UP nodes) and DU nodes.

The network device provides services for the cell, and the terminal device communicates with the cell through transmission resources (e.g., frequency domain resources, or spectrum resources) allocated by the network device, where the cell may belong to a macro base station (e.g., macro eNB or macro gNB, etc.), or may belong to a base station corresponding to a small cell (small cell), where the small cell may include: urban cells (metro cells), micro cells (micro cells), pico cells (pico cells), femto cells (femto cells) and the like, and the small cells have the characteristics of small coverage area and low transmitting power and are suitable for providing high-rate data transmission services.

In the embodiment of the application, the terminal device or the network device includes a hardware layer, an operating system layer running above the hardware layer, and an application layer running above the operating system layer. The hardware layer includes hardware such as a central processing unit (central processing unit, CPU), a memory management unit (memory management unit, MMU), and a memory (also referred to as a main memory). The operating system may be any one or more computer operating systems that implement business processes through processes (processes), such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system. The application layer comprises applications such as a browser, an address book, word processing software, instant messaging software and the like. Further, the embodiment of the present application is not particularly limited to the specific structure of the execution body of the method provided in the embodiment of the present application, as long as the communication can be performed by the method provided in the embodiment of the present application by running the program recorded with the code of the method provided in the embodiment of the present application, and for example, the execution body of the method provided in the embodiment of the present application may be a terminal device or a network device, or a functional module in the terminal device or the network device that can call the program and execute the program.

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

To facilitate understanding of embodiments of the present application, a communication system suitable for use in embodiments of the present application will be described in detail with reference to fig. 1.

Fig. 1 shows a communication system 100 to which embodiments of the present application apply. The communication system 100 may include at least two terminal devices, such as terminal device 110 and terminal device 120. The communication system 100 may also include a network device 130, such as a base station or base station controller, etc. Where network device 130 may provide communication coverage for a particular geographic area and may communicate with terminal devices located within that coverage area (cell). In the communication system 100, the terminal device 120 is located in the coverage area of the network device 130, and the terminal device 110 may be located in the coverage area of the network device 130 or not located in the coverage area of the network device 130.

In this application, the terminal device 120 may assist the terminal device 110 to send uplink data to the network device 130, which is referred to as uplink cooperative transmission (may also be referred to as uplink transmission based on user cooperation). The uplink cooperative transmission can obviously improve the capacity of the system and the coverage area of the network, and simultaneously can reduce the load of network equipment. The uplink cooperative transmission mainly comprises two stages: the first phase is for the source terminal device (e.g., source user device (source user equipment, SUE)) to send data to the cooperating terminal device (e.g., cooperating user device (cooperative user equipment, CUE)); the second stage is that the cooperative terminal device forwards the correctly received data to the network device. The data forwarding of the cooperative terminal device may be performed by different forwarding modes, for example, amplification forwarding, decoding forwarding, compression forwarding, and the like. In this way, the source terminal equipment can realize reliable transmission of data under the assistance of the cooperative terminal equipment, so that uplink coverage and system transmission efficiency are improved. In the uplink cooperative transmission shown in fig. 1, the terminal device 110 may be referred to as a source terminal device, and the terminal device 120 may be referred to as a cooperative terminal device.

It should be appreciated that in uplink cooperative transmission, a source terminal device and several cooperative terminal devices serving it may form one user cooperation group. For example, the source terminal device and the cooperative terminal device 1, 2 form one user cooperation group. For one terminal device, it may be a source terminal device of a user cooperation group centered on itself, and may also be other one or more cooperating terminal devices of a user cooperation group, which is not limited in the embodiment of the present application. Furthermore, in the same cell, there may be a plurality of different user cooperation groups. For uplink cooperative transmission, when there are multiple potential cooperative terminal devices around the source terminal device, the network device or the source terminal device may select one or more cooperative terminal devices from the multiple potential cooperative terminal devices to perform data transmission.

Fig. 1 exemplarily shows one network device and three terminal devices (including one source terminal device and two cooperative terminal devices), alternatively, the number of cooperative terminal devices corresponding to the source terminal device may also be more than two, and the communication system 100 may include a plurality of network devices and may include other numbers of terminal devices within a coverage area of each network device, which is not limited in the embodiment of the present application.

Optionally, the communication system 100 may further include a network controller, a mobility management entity, and other network entities, which embodiments of the present application are not limited thereto.

In order to facilitate understanding of the embodiments of the present application, the following description is made.

1. In the embodiments of the present application, "used for indicating" may include used for direct indication and used for indirect indication, and may also include explicit indication and implicit indication. In the specific implementation process, the manner of indicating the information to be indicated is various, for example, but not limited to, the information to be indicated may be directly indicated, such as the information to be indicated itself or an index of the information to be indicated. The information to be indicated can also be indicated indirectly by indicating other information, wherein the other information and the information to be indicated have an association relation. It is also possible to indicate only a part of the information to be indicated, while other parts of the information to be indicated are known or agreed in advance. The indication of the information to be indicated may also be achieved by means of a pre-agreement (e.g. a protocol definition) whether a certain cell is present, for example, thus reducing the indication overhead to some extent.

2. The first, second, third, fourth, and various numerical numbers in the embodiments shown below are merely for convenience of description and are not intended to limit the scope of the embodiments of the present application. For example, different information, different terminal devices, etc.

3. In the embodiments shown below, "pre-fetching" may include signaling or pre-defining by the network device, e.g., protocol definition. The "pre-defining" may be implemented by pre-storing corresponding codes, tables or other manners that may be used to indicate relevant information in devices (including, for example, terminal devices and network devices), and the application is not limited to a specific implementation manner thereof.

4. The "protocol" referred to in the embodiments of the present application may refer to a standard protocol in the field of communications, and may include, for example, a long term evolution (long term evolution, LTE) protocol, a New Radio (NR) protocol, and related protocols applied in future communication systems, which are not limited in this application.

In the following, various embodiments provided in the present application will be described in detail by taking a source terminal device as a second terminal device (corresponding to the terminal device 110 in fig. 1) and a cooperative terminal device as a first terminal device (corresponding to the terminal device 120 in fig. 1) as an example.

Fig. 2 shows a schematic flow chart of a data transmission method according to an embodiment of the present application. The method 200 may be applied to the communication system 100 shown in fig. 1, but embodiments of the present application are not limited thereto.

S210, the second terminal equipment determines a first resource pool, wherein the first resource pool is used for transmitting a data packet to the cooperative terminal equipment by the source terminal equipment in uplink cooperative transmission.

S220, the second terminal equipment sends a first data packet to the first terminal equipment on the resources in the first resource pool; correspondingly, the first terminal device receives the first data packet from the second terminal device on the resources in the first resource pool.

S230, the first terminal equipment determines that the first data packet needs to be forwarded to the network equipment according to the first data packet received on the resources in the first resource pool;

s240, the first terminal equipment forwards the first data packet to the network equipment on resources in a second resource pool, wherein the second resource pool is used for forwarding the data packet sent by the source terminal equipment to the network equipment by the cooperative terminal equipment; the network device correspondingly receives a first data packet from the first terminal device on the resources of the second resource pool.

And S250, the network equipment determines that the first data packet is forwarded by the first terminal equipment according to the first data packet received from the first terminal equipment on the resources of the second resource pool.

It should be understood that "the source terminal device in the uplink cooperative transmission sends a data packet to the cooperative terminal device in the first resource pool" refers to: the first resource pool is dedicated to the source terminal device in the uplink cooperative transmission to send a data packet to the cooperative terminal device. In other words, the first resource pool is not used for data transmission of other transmission types (e.g., conventional single-hop data transmission between one terminal device and another terminal device), but is used only for data transmission in the first stage of uplink cooperative transmission. In this way, when the first terminal device receives a data packet sent by the resource of the first resource pool, the first terminal device may consider that the data packet is a data packet for uplink cooperative transmission, and needs to forward the data packet to the network device.

Likewise, the above "the second resource pool is used for forwarding, by the cooperative terminal device, the data packet sent by the source terminal device to the network device" means that: the second resource pool is dedicated to the cooperative terminal device in the uplink cooperative transmission forwarding the data packet to the network device, where the data packet is from the source terminal device. In other words, the second resource pool is not used for data transmission of other transmission types (e.g., uplink data transmission between a legacy terminal device and a network device), but is used only for data transmission in the second stage of uplink cooperative transmission. In this way, if the network device receives a data packet sent by the resource of the second resource pool, the network device can consider that the data packet is a data packet of uplink cooperative transmission, that is, can determine that the data packet is a data packet forwarded by the first terminal device and coming from the second terminal device.

Illustratively, the resources in the first resource pool and the second resource pool may include time domain resources and/or frequency domain resources, and may also include other resources, such as space domain resources, which are not limited in the embodiments of the present application.

Fig. 3 shows a schematic diagram of resource pool configuration provided in an embodiment of the present application. Fig. 3 includes four types of resource pools, where the first and second resource pools are dedicated to uplink cooperative transmission as described above; the third resource pool is dedicated for side-link transmission, i.e. single-hop data transmission of the second terminal device and the first terminal device; the fourth resource pool is dedicated for uplink data transmission between the first terminal device and the network device. In this way, the first terminal device receives the data packet from the second terminal device, and can determine the transmission type corresponding to the data packet according to the resources adopted by the second terminal device to transmit the data packet, if the data packet is transmitted by adopting the resources in the first resource pool, the first terminal device can determine that the data packet needs to be forwarded to the network device, and if the data packet is transmitted by adopting the resources in the third resource pool, the first terminal device can determine that the data packet is transmitted to the first terminal device without forwarding. Similarly, when the network device receives the data packet from the first terminal device, the network device may determine the transmission type corresponding to the data packet according to the resource adopted by the first terminal device to send the data packet, if the data packet is transmitted by adopting the resource in the second resource pool, the network device may determine that the data packet is forwarded by the first terminal device and comes from the second terminal device, and if the data packet is transmitted by adopting the resource in the fourth resource pool, the network device may determine that the data packet comes from the first terminal device.

Therefore, in the uplink cooperative transmission process, the source terminal device, the cooperative terminal device and the network device all adopt resources in the resource pool dedicated for uplink cooperative transmission to perform data transmission, so that the cooperative terminal device can distinguish between the uplink cooperative transmission resources and the side uplink transmission resources, the network device can distinguish between the resources forwarded by the cooperative terminal device and the resources sent to the network device by the terminal device, so that the terminal device and the network device can directly perform uplink cooperative transmission by adopting the resources corresponding to the transmission mode, scheduling signaling is not needed, signaling overhead can be saved, and data transmission time delay is reduced.

As an alternative embodiment, before the network device receives the first data packet from the first terminal device on the resources of the second resource pool, the method further comprises: the network device sends first information and second information, wherein the first information is used for configuring a first resource pool, and the second information is used for configuring a second resource pool.

The first terminal device receives first information and second information from the network device, the second information being used to configure the second resource pool, and the second terminal device receives the first information from the network device or the first terminal device, respectively.

In addition, since the first terminal device is a cooperative terminal device, the first terminal device is necessarily located within the coverage area of the network device, and the first terminal device may receive the first information and the second information sent by the network device. However, the second terminal device may not be in the coverage area of the network device, and may not be able to receive the first information sent by the network device. In one possible implementation, the first terminal device may forward the first information received from the network device to the second terminal device, so that the second terminal device determines the first resource pool according to the first information, thereby performing uplink data transmission on the first resource pool.

The above embodiment is performed under the condition that uplink cooperative transmission can be adopted by default, alternatively, the network device may activate or deactivate uplink cooperative transmission through signaling, and under the condition that the network device activates uplink cooperative transmission, the second terminal device, the first terminal device and the network device may use the resources in the first resource pool and the resources in the second resource pool to perform data transmission.

As an alternative embodiment, before the network device receives the first data packet from the first terminal device on the resources of the second resource pool, the method further comprises: and the network equipment sends third information to the first terminal equipment, wherein the third information is used for indicating the first terminal equipment to activate the uplink cooperative transmission.

Correspondingly, the first terminal device receives third information from the network device, where the third information is used to instruct the first terminal device to activate the uplink cooperative transmission.

As an alternative embodiment, the third information is received by the first terminal device from the network device; after the first terminal device receives the third information from the network device, the method further comprises: the first terminal equipment sends fourth information to the second terminal equipment, wherein the fourth information is used for indicating the second terminal equipment to activate the uplink cooperative transmission.

Correspondingly, the second terminal device receives fourth information from the first terminal device, where the fourth information is used to instruct the second terminal device to activate the uplink cooperative transmission.

As an alternative embodiment, the method further comprises: and the network equipment sends fourth information to the second terminal equipment, wherein the fourth information is used for indicating the second terminal equipment to activate the uplink cooperative transmission.

The second terminal device correspondingly receives the fourth information from the network device.

For example, the network device may directly send the fourth information to the second terminal device, and instruct the second terminal device to activate uplink cooperative transmission. The second terminal device may send the data packet using the resources in the first resource pool if the fourth information is received.

The fourth information may be configured by the network device through signaling, such as RRC signaling or DCI.

It will be appreciated that this approach is more applicable in the case where the second terminal device is located within the coverage area of the network device. Thus, the first terminal equipment does not need to send fourth information to the second terminal equipment, the signaling overhead of the first terminal equipment can be saved, and the burden of the first terminal equipment is reduced.

The embodiment of the present application does not exclude a case where, in order to improve the reliability of the second terminal device receiving the fourth information, both the first terminal device and the network device send the fourth information to the second terminal device.

As an optional embodiment, in the case of uplink cooperative transmission activation, the network device may also instruct the uplink cooperative transmission to deactivate, i.e. stop the uplink cooperative transmission, to stop the use of the first resource pool and the second resource pool by signaling. The indication of deactivation is similar to the indication of activation and will not be described in detail here.

As an alternative embodiment, before the network device receives the first data packet from the first terminal device on the resources of the second resource pool, the method further comprises: the network device sends fifth information to the first terminal device and/or the second terminal device, wherein the fifth information is used for indicating at least one of the following information: the first resources in the first resource pool correspond to the second terminal equipment; or, the second resource of the second resource corresponds to the second terminal device; or, a demodulation reference signal (demodulation reference signal, DMRS) of the second terminal device; or, a radio network temporary identity (radio network temporary identity, RNTI) of the second terminal device.

The first terminal device receives the fifth information from the network device and the second terminal device receives the fifth information from the network device or the first terminal device, respectively.

It should be appreciated that the RNTI is a cyclic redundancy check (cyclic redundancy check, CRC) used to scramble control information sent by the sender, and the receiver can blindly check the control channel and descramble the control information with the same RNTI. The control information is used for scheduling the transmission of the data packet of the data channel, indicating the resources used by the data packet, and the receiving end receives the data packet according to the control information after descrambling the control information by adopting the RNTI.

For convenience of description herein, the first terminal device or the second terminal device transmitting the first data packet corresponding to the control information transmitted by the RNTI-scrambled CRC is referred to as: the first terminal device or the second terminal device sends (or transmits) the first data packet using the RNTI. Correspondingly, the first terminal device or the network device receives the first data packet corresponding to the control information sent by the RNTI-scrambled CRC, and is referred to as: the first terminal device (or network device) receives the first data packet from the second terminal device (or first terminal device) using the RNTI.

The fifth information may be configured by the network device through signaling, for example, RRC signaling or DCI. Optionally, the first terminal device may send the fifth information to the second terminal device, so as to improve reliability of the second terminal device for obtaining the fifth information. This approach is more applicable to scenarios where the second terminal device is not within the coverage of the network device.

As an alternative embodiment, based on the content of the fifth information, two stages in the uplink cooperative transmission are described below, respectively.

For the first stage in uplink cooperative transmission, this embodiment may include the following cases:

In case 1, the fifth information is used to indicate that the first resource in the first resource pool corresponds to the second terminal device. The second terminal device may send the first data packet to the first terminal device on the first resource, and correspondingly, the first terminal device may receive the first data packet on the first resource.

In this embodiment, the second terminal device corresponds to a first resource in the first resource pool, and the second terminal device may use the first resource to send a first data packet to the first terminal device, and if the first terminal device receives the first data packet transmitted through the first resource, the first terminal device may determine that the first data packet is from the second terminal device. In the embodiment of the application, the cooperative terminal equipment can distinguish different source terminal equipment by utilizing time-frequency resources, which is beneficial to saving space resource overhead or orthogonal code resource overhead.

In one possible implementation manner, the first resource in the first resource pool may be a subchannel, that is, the first resource pool is divided into a plurality of subchannels, where the number of subchannels is greater than or equal to the number of source terminal devices, and one subchannel may be used for data transmission of one source terminal device. Taking SUE and CUE as examples, CUE may perform data transmission with SUE 1, SUE 2 and SUE 3 at the same time, where resources in the first resource pool are divided into sub-channel 1, sub-channel 2 and sub-channel 3, where sub-channel 1 corresponds to SUE 1, sub-channel 2 corresponds to SUE 2, and sub-channel 3 corresponds to SUE 3. That is, SUE 1 may send a packet to CUE over subchannel 1, SUE 2 may send a packet to CUE over subchannel 2, and SUE 3 may send a packet to CUE over subchannel 3. Thus, the CUE can determine the source of the data packet according to the subchannel corresponding to the data packet.

Illustratively, the above-mentioned subchannels may be frequency-divided, i.e. different frequency bands may correspond to different subchannels; alternatively, the subchannels may be time-division, i.e., different time periods may correspond to different subchannels; alternatively, the subchannels may be time-frequency resource patterns (patterns), i.e., different patterns may correspond to different subchannels. The embodiments of the present application are not limited in this regard.

In case 2, the fifth information is used to indicate DMRS of the second terminal device. The second terminal device may send the first data packet to the first terminal device using the DMRS of the second terminal device on the resources in the first resource pool, and correspondingly, the first terminal device may receive the first data packet from the second terminal device using the DMRS of the second terminal device on the resources in the first resource pool.

It should be understood that the DMRS is mainly used for channel estimation of a physical channel by a receiving end in order to correctly demodulate a control channel and a data channel. DMRS is a specific reference signal of a terminal device, and DMRS is different (or distinguishable) between different terminal devices. On a transmission resource block, a control channel may occupy a portion of time-frequency resources, a data channel may occupy a portion of time-frequency resources, and a reference signal may occupy a portion of time-frequency resources. Therefore, in the embodiment of the present application, the network device may configure different DMRS for different second terminal devices, which are used for demodulating the first data packet sent by the second terminal device.

In this embodiment, the second terminal device may use the DMRS of the second terminal device to send the first data packet to the first terminal device, and if the first terminal device receives the first data packet transmitted using the DMRS of the second terminal device, the first terminal device may determine that the first data packet is from the second terminal device. In the embodiment of the application, the cooperative terminal equipment can distinguish different source terminal equipment by using the DMRS, and different multiple source terminal equipment can send the data packet on the same time-frequency resource, so that the frequency spectrum efficiency is higher.

And 3, the fifth information is used for indicating the RNTI of the second terminal equipment. The second terminal device may send the first data packet transmitted with the RNTI of the second terminal device to the first terminal device on a resource in the first resource pool, and correspondingly, the first terminal device may receive the first data packet from the second terminal device with the RNTI of the second terminal device on the first resource.

It should be understood that the RNTI is used to scramble the CRC transmitted by the transmitting end, and the receiving end can blindly check the control channel and descramble the control information with the same RNTI. In this embodiment of the present application, the network device may configure different RNTIs for different second terminal devices, where the RNTIs are used to scramble CRCs of sideline control information sent by the second terminal devices through the sideline control channels, where the sideline control information is used to indicate resources used by the sideline data channels to send the data packets, and the second terminal devices send the first data packets on the resources indicated by the sideline control information through the sideline data channels.

In this embodiment, the second terminal device may use the RNTI of the second terminal device to scramble the CRC of the sideline control information sent to the first terminal device and used for indicating the resource used by the first data packet, and if the first terminal device receives the sideline control information transmitted using the RNTI of the second terminal device, it may determine that the first data packet corresponding to the resource indicated by the sideline control information is from the second terminal device. In the embodiment of the application, the cooperative terminal equipment can accurately distinguish different source terminal equipment by utilizing the RNTI.

For the second stage in uplink cooperative transmission, this embodiment may include the following cases:

in case 1, the fifth information is used to indicate that the second resource in the second resource pool corresponds to the second terminal device. The first terminal device may forward the first data packet to the network device on the second resource, and correspondingly, the network device may receive the first data packet from the second terminal device from the first terminal device on the second resource.

In this embodiment, the second terminal device corresponds to a second resource in the second resource pool, and the first terminal device may forward, to the network device, a first data packet from the second terminal device using the second resource, and if the network device receives the first data packet transmitted through the second resource, it may determine that the first data packet is from the second terminal device. In the embodiment of the application, the network equipment can distinguish different source terminal equipment by utilizing the time-frequency resource, which is beneficial to saving space resource overhead or orthogonal code resource overhead.

In one possible implementation manner, the second resource in the second resource pool may be a subchannel, that is, the second resource pool is divided into a plurality of subchannels, where the number of subchannels is greater than or equal to the number of source terminal devices, and one subchannel may be used for data transmission of one source terminal device. Taking SUE and CUE as examples, CUE may perform data transmission with SUE 1, SUE 2 and SUE 3 at the same time, where resources in the second resource pool are divided into sub-channel 1, sub-channel 2 and sub-channel 3, where sub-channel 1 corresponds to SUE 1, sub-channel 2 corresponds to SUE 2, and sub-channel 3 corresponds to SUE 3. That is, the CUE may forward the packet from SUE 1 to the network device over subchannel 1, the CUE may forward the packet from SUE 2 to the network device over subchannel 2, and the CUE may forward the packet from SUE 3 to the network device over subchannel 3. Thus, the network device can determine the source of the data packet according to the sub-channel corresponding to the data packet.

In case 2, the fifth information is used to indicate DMRS of the second terminal device. The first terminal device may send the first data packet to the network device using the DMRS of the second terminal device on the resources in the second resource pool, and correspondingly, the network device may receive the first data packet from the second terminal device on the resources of the second resource pool using the DMRS of the second terminal device.

In this embodiment, the first terminal device may forward the first data packet from the second terminal device to the network device using the DMRS of the second terminal device, and if the network device receives the first data packet transmitted through the DMRS of the second terminal device, it may determine that the first data packet is from the second terminal device. In the embodiment of the application, the network device can distinguish different source terminal devices by using the DMRS, and different multiple source terminal devices can send data packets on the same time-frequency resource, so that the frequency spectrum efficiency is higher.

And 3, the fifth information is used for indicating the RNTI of the second terminal equipment. The first terminal device may forward the first data packet to the network device using the RNTI of the second terminal device on the resources in the second resource pool, and correspondingly, the network device may receive the first data packet transmitted using the RNTI of the second terminal device from the first terminal device on the resources in the second resource pool.

In this embodiment of the present application, the RNTI is used to scramble a CRC of uplink control information sent by the first terminal device through an uplink control channel, where the uplink control information is used to indicate a resource used by the uplink data channel to send a data packet, and the second terminal device sends the first data packet on the resource indicated by the uplink control information through the uplink data channel.

In this embodiment, the first terminal device may use the RNTI of the second terminal device to scramble the CRC forwarded to the network device for indicating the uplink control information of the resource used by the first data packet from the second terminal device, and if the network device receives the uplink control information transmitted through the RNTI of the second terminal device, it may determine that the first data packet corresponding to the resource indicated by the uplink control information is from the second terminal device. In the embodiment of the application, the network equipment can accurately distinguish different source terminal equipment by utilizing the RNTI.

It should be understood that the above-described cases of the first stage and the second stage may be arbitrarily combined, for example, case 1 of the first stage and case 1 of the second stage, case 2 of the first stage and case 1 of the second stage, case 3 of the first stage and case 2 of the second stage, and the like, which are not listed here.

In addition, in the above-mentioned first stage, a manner of combining multiple cases may also be adopted, and it is assumed that case 1 and case 2 in the first stage are combined, for example, case 1 is first adopted to configure SUE 1 and SUE 2 to correspond to the first resource in the first resource pool, SUE 3 corresponds to other part of the resources in the first resource pool, and in order to further distinguish SUE 1 and SUE 2, DMRS of SUE 1 and DMRS of SUE 2 may be configured. The second stage is the same and will not be described in detail here.

As an alternative embodiment, the first data packet includes sixth information, where the sixth information is used to indicate an identification of the second terminal device.

The second terminal device may illustratively carry an identification of the second terminal device in the first data packet for the receiving end (first terminal device and/or network device) to determine the source of the first data packet.

It should be understood that, although the method for indicating the source of the data packet by the explicit method and the implicit method is described above based on the scenario that one cooperative terminal device provides services for multiple source terminal devices at the same time, in the practical application process, the fifth information and the sixth information are not only sent in this scenario, which is not limited in the embodiments of the present application.

Similar to the method 200 described above, the present application also proposes a data transmission method 300, comprising the following steps:

the second terminal equipment sends a first data packet to the first terminal equipment, wherein the first data packet carries seventh information, and the seventh information is used for indicating that the first data packet needs to be forwarded; correspondingly, the first terminal device receives the first data packet from the second terminal device;

the first terminal device determines that the first data packet needs to be forwarded to the network device according to the seventh information;

the first terminal equipment forwards the first data packet to the network equipment on resources in a second resource pool, wherein the second resource pool is used for forwarding the data packet sent by the source terminal equipment to the network equipment by the cooperative terminal equipment; the network device correspondingly receives a first data packet from the first terminal device on the resources of the second resource pool.

The network device determines that the first data packet is forwarded by the first terminal device according to the first data packet received from the first terminal device on the resources of the second resource pool.

In the data transmission method of the embodiment of the application, in the first stage of uplink cooperative transmission, the second terminal device instructs the first terminal device to forward the data packet in an explicit instruction manner. The seventh information may be an indication field carried in the side-uplink control information (sidelink control information, SCI). In the second stage of uplink cooperative transmission, the first terminal device forwards the first data packet to the network device through the resources in the second resource pool, and the second stage is the same as the above method 200, and the related description may refer to the method 200, which is not repeated herein.

It should be understood that method 300 differs from method 200 only in that: the first stage of the method 200 indicates that the first terminal device needs to forward the first data packet in an implicit indication manner, and the method 300 indicates that the first terminal device needs to forward the first data packet in an explicit indication manner.

It should also be understood that the second stage of uplink cooperative transmission may also use an explicit indication method to indicate the source of the first data packet, and the explicit indication method and the implicit indication method of the first stage and the second stage may be arbitrarily combined, that is, in addition to the two cases listed above, a method of the first stage implicit indication and the second stage explicit indication may also be used, or a method of the first stage explicit indication and the second stage explicit indication is not limited herein.

The sequence numbers of the above-mentioned processes do not mean the sequence of execution sequence, and the execution sequence of each process should be determined by its functions and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

The data transmission method according to the embodiment of the present application is described in detail above with reference to fig. 1 to 3, and the data transmission apparatus according to the embodiment of the present application will be described in detail below with reference to fig. 4 to 5.

Fig. 4 shows a data transmission device 400 provided in an embodiment of the present application. As shown, the apparatus 400 may include: a transceiver unit 410 and a processing unit 420.

In a possible implementation manner, the apparatus 400 may implement steps or flows performed by the first terminal device corresponding to the above method embodiments, for example, the apparatus 400 may be the first terminal device, or may be an apparatus capable of supporting the first terminal device to implement its function, for example, a chip or a chip system that may be used in the first terminal device. When the apparatus is a terminal device, the transceiver unit may be a transceiver, may include an antenna, a radio frequency circuit, and the like, and the processing module may be a processor, for example: a central processing unit (central processing unit, CPU). When the apparatus is a component having the above-mentioned terminal device function, the transceiver unit may be a radio frequency unit, and the processing module may be a processor. When the device is a chip system, the transceiver unit may be an input/output interface of the chip system, and the processing module may be a processor of the chip system.

Wherein, the transceiver unit 410 is configured to: receiving a first data packet from a second terminal device on a resource in a first resource pool, wherein the first resource pool is used for transmitting the data packet to a cooperative terminal device by a source terminal device in uplink cooperative transmission, the device is the cooperative terminal device, and the second terminal device is the source terminal device; the processing unit 420 is configured to: according to the first data packet received on the resources in the first resource pool, determining that the first data packet needs to be forwarded to network equipment; the transceiver unit 410 is further configured to: and forwarding the first data packet to the network equipment on resources in a second resource pool, wherein the second resource pool is used for forwarding the data packet sent by the source terminal equipment to the network equipment by the cooperative terminal equipment.

Optionally, the transceiver unit 410 is further configured to: first information and second information are received from the network device before a first data packet is received from the second terminal device on resources in a first resource pool, the first information being used to configure the first resource pool, and the second information being used to configure the second resource pool.

Optionally, the transceiver unit 410 is further configured to: and before receiving the first data packet from the second terminal equipment on the resources in the first resource pool, receiving third information from the network equipment or the second terminal equipment, wherein the third information is used for indicating the device to activate the uplink cooperative transmission.

Optionally, the third information is received by the apparatus from the network device, and the transceiver unit 410 is further configured to: and after receiving the third information from the network equipment, sending fourth information to the second terminal equipment, wherein the fourth information is used for indicating the second terminal equipment to activate the uplink cooperative transmission.

Optionally, the transceiver unit 410 is further configured to: receiving fifth information from the network device before receiving the first data packet from the second terminal device on resources in the first resource pool, the fifth information being used to indicate at least one of the following information: the first resources in the first resource pool correspond to the second terminal equipment; or, the second resource in the second resource pool corresponds to the second terminal equipment; or, the demodulation reference signal DMRS of the second terminal device; or, the radio network temporary identifier RNTI of the second terminal device.

Optionally, the fifth information is used to indicate that the first resource corresponds to the second terminal device, and the transceiver unit 410 is specifically configured to: receiving the first data packet on the first resource; or, the fifth information is used to indicate the DMRS of the second terminal device, and the transceiver unit 410 is specifically configured to: receiving the first data packet from the second terminal device using the DMRS of the second terminal device on resources in the first resource pool; or, the fifth information is used to indicate an RNTI of the second terminal device, and the transceiver unit 410 is specifically configured to: and receiving the first data packet from the second terminal equipment by adopting the RNTI of the second terminal equipment on the first resource.

Optionally, the fifth information is used to indicate that the second resource corresponds to the second terminal device, and the transceiver unit 410 is specifically configured to: forwarding the first data packet to the network device on the second resource; or, the fifth information is used to indicate the DMRS of the second terminal device, and the transceiver unit 410 is specifically configured to: transmitting the first data packet to the network device on the resources in the second resource pool by adopting the DMRS of the second terminal device; or, the fifth information is used to indicate an RNTI of the second terminal device, and the transceiver unit 410 is specifically configured to: and forwarding the first data packet to the network equipment by adopting the RNTI of the second terminal equipment on the resources in the second resource pool.

Optionally, the first data packet includes sixth information, where the sixth information is used to indicate an identifier of the second terminal device.

In a possible implementation manner, the apparatus 400 may implement steps or flows performed by the second terminal device corresponding to the above method embodiment, for example, the apparatus 400 may be the second terminal device, or may be an apparatus capable of supporting the second terminal device to implement its function, for example, a chip or a chip system that may be used in the second terminal device. When the apparatus is a terminal device, the transceiver unit may be a transceiver, may include an antenna, a radio frequency circuit, and the like, and the processing module may be a processor, for example: a central processing unit (central processing unit, CPU). When the apparatus is a component having the above-mentioned terminal device function, the transceiver unit may be a radio frequency unit, and the processing module may be a processor. When the device is a chip system, the transceiver unit may be an input/output interface of the chip system, and the processing module may be a processor of the chip system.

Wherein the processing unit 420 is configured to: determining a first resource pool, wherein the first resource pool is used for transmitting a data packet to a cooperative terminal device by a source terminal device in uplink cooperative transmission; the transceiver unit 410 is configured to: and sending a first data packet to a first terminal device on the resources in the first resource pool, wherein the first terminal device is the cooperative terminal device, and the device is the source terminal device.

Optionally, the processing unit 420 is specifically configured to: first information is received from a network device or the first terminal device, the first information being used to configure the first resource pool.

Optionally, the transceiver unit 410 is further configured to: and before a first data packet is sent to the first terminal equipment on the resources in the first resource pool, fourth information is received from the network equipment or the first terminal equipment, and the fourth information is used for indicating the device to activate the uplink cooperative transmission.

Optionally, the fourth information is received by the apparatus from the network device, and the transceiver unit 410 is further configured to: and after receiving the fourth information from the network equipment, sending third information to the first terminal equipment, wherein the third information is used for indicating the first terminal equipment to activate the uplink cooperative transmission.

Optionally, the transceiver unit 410 is further configured to: before sending a first data packet to the first terminal device on a resource in the first resource pool, receiving fifth information from the network device or the first terminal device, the fifth information being used to indicate at least one of the following information: a first resource in the first resource pool corresponds to the device; or, demodulation reference signal DMRS of the apparatus; or, a radio network temporary identity, RNTI, of the apparatus.

Optionally, the fifth information is used to indicate that the first resource in the first resource pool corresponds to the apparatus, and the transceiver unit 410 is specifically configured to: transmitting the first data packet to the first terminal equipment on the first resource; or, the fifth information is used to indicate the DMRS of the device, and the transceiver 410 is specifically configured to: transmitting the first data packet to the first terminal device on the resources in the first resource pool by adopting the DMRS of the device; or, the fifth information is used to indicate an RNTI of the apparatus, and the transceiver unit 410 is specifically configured to: and sending the first data packet transmitted by adopting the RNTI of the device to the first terminal equipment on the resources in the first resource pool.

Optionally, the first data packet includes sixth information, where the sixth information is used to indicate an identification of the device.

In a possible implementation manner, the apparatus 400 may implement steps or flows performed by a network device corresponding to the above method embodiments, for example, the apparatus 400 may be a network device, or may be an apparatus capable of supporting the network device to implement its function, for example, a chip or a chip system that may be used in the network device. When the apparatus is a network device, the transceiver unit may be a transceiver, may include an antenna, a radio frequency circuit, and the like, and the processing module may be a processor, for example: a central processing unit (central processing unit, CPU). When the apparatus is a component having the above-mentioned network device function, the transceiver unit may be a radio frequency unit, and the processing module may be a processor. When the device is a chip system, the transceiver unit may be an input/output interface of the chip system, and the processing module may be a processor of the chip system.

Wherein, the transceiver unit 410 is configured to: receiving a first data packet from the first terminal equipment on the resource of a second resource pool, wherein the second resource pool is used for forwarding the data packet sent by the source terminal equipment to the device by the cooperative terminal equipment in uplink cooperative transmission, and the first terminal equipment is the cooperative terminal equipment; the processing unit 420 is configured to: and according to the first data packet received from the first terminal equipment on the resources of the second resource pool, determining that the first data packet is forwarded by the first terminal equipment.

Optionally, the transceiver unit 410 is further configured to: before receiving a first data packet from the first terminal device on the resource of the second resource pool, sending first information and second information, wherein the first information is used for configuring the first resource pool, the second information is used for configuring the second resource pool, and the first resource pool is used for sending the data packet to the cooperative terminal device by the source terminal device in the uplink cooperative transmission.

Optionally, the transceiver unit 410 is further configured to: and before receiving a first data packet from the first terminal equipment on the resources of the second resource pool, sending third information to the first terminal equipment, wherein the third information is used for indicating the first terminal equipment to activate the uplink cooperative transmission.

Optionally, the transceiver unit 410 is further configured to: and sending fourth information to a second terminal device, wherein the fourth information is used for indicating the second terminal device to activate the uplink cooperative transmission, and the second terminal device is the source terminal device in the uplink cooperative transmission.

Optionally, the transceiver unit 410 is further configured to: before receiving the first data packet from the first terminal device on the resources of the second resource pool, sending fifth information to the first terminal device and/or a second terminal device, where the second terminal device is the source terminal device in the uplink cooperative transmission, and the fifth information is used to indicate at least one of the following information: the first resources in the first resource pool correspond to the second terminal equipment; or, the second resource of the second resource corresponds to the second terminal device; or, the demodulation reference signal DMRS of the second terminal device; or, the radio network temporary identifier RNTI of the second terminal device.

Optionally, the fifth information is used to indicate that the second resource in the second resource pool corresponds to the second terminal device, and the transceiver unit 410 is specifically configured to: receiving the first data packet from the second terminal device on the second resource from the first terminal device; or, the fifth information is used to indicate the DMRS of the second terminal device, and the transceiver unit 410 is specifically configured to: receiving the first data packet from the second terminal device from the first terminal device using the DMRS of the second terminal device on the resources of the second resource pool; or, the fifth information is used to indicate an RNTI of the second terminal device, and the transceiver unit 410 is specifically configured to: and receiving the first data packet transmitted by using the RNTI of the second terminal equipment from the first terminal equipment on the resource of the second resource pool.

In the data transmission device of the embodiment of the application, in the uplink cooperative transmission process, the source terminal device, the cooperative terminal device and the network device all adopt resources in the resource pool special for uplink cooperative transmission to perform data transmission, so that the cooperative terminal device can distinguish between uplink cooperative transmission data and side uplink transmission data, and the network device can distinguish between data forwarded by the cooperative terminal device and uplink data sent to the network device by the terminal device, thereby improving accuracy of data transmission. It should be appreciated that the apparatus 400 herein is embodied in the form of functional units. The term "unit" herein may refer to an application specific integrated circuit (application specific integrated circuit, ASIC), an electronic circuit, a processor (e.g., a shared, dedicated, or group processor, etc.) and memory that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable components that support the described functionality. In an alternative example, it will be understood by those skilled in the art that the apparatus 400 may be specifically a first terminal device, a second terminal device, or a network device in the foregoing embodiment, and the apparatus 400 may be configured to perform each flow and/or step corresponding to the first terminal device, the second terminal device, or the network device in the foregoing method embodiment, which is not described herein for avoiding repetition.

The apparatus 400 has a function of implementing corresponding steps executed by the first terminal device, the second terminal device, or the network device in the method; the functions may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above. For example, the transceiver unit 410 may include a transmitting unit and a receiving unit, where the transmitting unit may be configured to implement respective steps and/or procedures for performing a transmitting action corresponding to the transceiver unit, and the receiving unit may be configured to implement respective steps and/or procedures for performing a receiving action corresponding to the transceiver unit. The transmitting unit may be replaced by a transmitter and the receiving unit may be replaced by a receiver, performing the transceiving operations and the associated processing operations in the respective method embodiments, respectively. For another example, the transceiver unit 410 may be replaced by a communication interface to perform the transceiver operations in the various method embodiments. In the embodiment of the present application, the communication interface may be a circuit, a module, a bus interface, a transceiver, or a device that may implement a communication function. It is to be appreciated that the processing unit 420 in the above embodiments may be implemented by a processor or processor-related circuitry, and the transceiver unit 410 may be implemented by a transceiver or transceiver-related circuitry or interface circuitry.

Optionally, the apparatus possibly designed may further include a storage unit, where the storage unit is used to store a computer program, and the processing unit 420 may call and run the computer program from the storage unit, so that the apparatus 400 performs a method on a terminal device side in the method embodiment, or performs a method on a network device side in the method embodiment, which is not limited in this application.

Further, the units in the above embodiments may also be referred to as modules or circuits or components, etc. In embodiments of the present application, the apparatus of fig. 4 may also be a chip or a chip system, for example: system on chip (SoC). Correspondingly, the transceiver unit may be a transceiver circuit of the chip, which is not limited herein.

Fig. 5 shows another data transmission device 500 provided in an embodiment of the present application. The apparatus 500 includes a processor 510, a transceiver 520. Optionally, the apparatus 500 may further comprise a memory 550. Optionally, a memory 550 may be included in the processor 510. The processor 510, the transceiver 520 and the memory 550 are in communication with each other through an internal connection path, the memory 550 is used for storing instructions, and the processor 510 is used for executing the instructions stored in the memory 550, so as to implement the method provided in the embodiment of the present application.

In a possible implementation manner, the apparatus 500 is configured to execute each flow and step corresponding to the first terminal device in the method provided in the embodiment of the present application.

Wherein, this transceiver 520 is used for: receiving a first data packet from a second terminal device on a resource in a first resource pool, wherein the first resource pool is used for transmitting the data packet to a cooperative terminal device by a source terminal device in uplink cooperative transmission, the device is the cooperative terminal device, and the second terminal device is the source terminal device; the processor 520 is configured to: according to the first data packet received on the resources in the first resource pool, determining that the first data packet needs to be forwarded to network equipment; the transceiver 510 is also configured to: and forwarding the first data packet to the network equipment on resources in a second resource pool, wherein the second resource pool is used for forwarding the data packet sent by the source terminal equipment to the network equipment by the cooperative terminal equipment.

In a possible implementation manner, the apparatus 500 is configured to execute each flow and step corresponding to the second terminal device in the method provided in the embodiment of the present application.

Wherein the processor 510 is configured to: determining a first resource pool, wherein the first resource pool is used for transmitting a data packet to a cooperative terminal device by a source terminal device in uplink cooperative transmission; the transceiver 520 is configured to: and sending a first data packet to a first terminal device on the resources in the first resource pool, wherein the first terminal device is the cooperative terminal device, and the device is the source terminal device.

In a possible implementation manner, the apparatus 500 is configured to execute each flow and step corresponding to the network device in the method provided in the embodiment of the present application.

Wherein, this transceiver 520 is used for: receiving a first data packet from the first terminal equipment on the resource of a second resource pool, wherein the second resource pool is used for forwarding the data packet sent by the source terminal equipment to the device by the cooperative terminal equipment in uplink cooperative transmission, and the first terminal equipment is the cooperative terminal equipment; the processor 510 is configured to: and according to the first data packet received from the first terminal equipment on the resources of the second resource pool, determining that the first data packet is forwarded by the first terminal equipment.

It should be understood that the apparatus 500 may be specifically a first terminal device, a second terminal device, or a network device in the foregoing embodiment, and may be configured to perform each step and/or flow corresponding to the first terminal device, the second terminal device, or the network device in the foregoing method embodiment. Memory 550 may optionally include read only memory and random access memory, and provide instructions and data to the processor. A portion of the memory may also include non-volatile random access memory. For example, the memory may also store information of the device type. The processor 510 may be configured to execute instructions stored in the memory, and when the processor 510 executes the instructions stored in the memory, the processor 510 is configured to perform the steps and/or flows of the method embodiments described above corresponding to the first terminal device, the second terminal device, or the network device.

It should be appreciated that in embodiments of the present application, the processor of the apparatus described above may be a central processing unit (central processing unit, CPU), which may also be other general purpose processors, digital Signal Processors (DSPs), application Specific Integrated Circuits (ASICs), field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in a processor or by instructions in the form of software. The steps of a method disclosed in connection with the embodiments of the present application may be embodied directly in a hardware processor for execution, or in a combination of hardware and software elements in the processor for execution. The software elements may be located in a random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor executes instructions in the memory to perform the steps of the method described above in conjunction with its hardware. To avoid repetition, a detailed description is not provided herein.

It will be appreciated that the memory in embodiments of the present application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. The volatile memory may be random access memory (random access memory, RAM) which acts as an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous DRAM (SLDRAM), and direct memory bus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

In this application, "at least one" means one or more, and "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a alone, a and B together, and B alone, wherein A, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b or c may represent: a, b, c, a-b, a-c, b-c or a-b-c, wherein a, b, c can be single or multiple.

Those of ordinary skill in the art will appreciate that the various method steps and elements described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the steps and components of the various embodiments have been described generally in terms of functionality in the foregoing description to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Those of ordinary skill in the art may implement the described functionality using different approaches for each particular application, but such implementation is not to be considered as beyond the scope of the present application.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein. In the embodiments of the present application, where there is no logical conflict, embodiments may be referred to each other, for example, methods and/or terms between method embodiments may be referred to each other, for example, functions and/or terms between apparatus embodiments and method embodiments may be referred to each other.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. In addition, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices, or elements, or may be an electrical, mechanical, or other form of connection.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purposes of the embodiments of the present application.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium.

The method provided in the embodiments of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, produces a flow or function in accordance with embodiments of the present application, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, a network device, a user device, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., digital video disc (digital video disc, DVD)), or a semiconductor medium (e.g., SSD), etc.

While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the invention. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A data transmission method, comprising:

the first terminal device receives fifth information from the network device, the fifth information being used to indicate at least one of the following information: the first resources in the first resource pool correspond to the second terminal equipment; or, the second resource in the second resource pool corresponds to the second terminal equipment; or, the demodulation reference signal DMRS of the second terminal device; or, a Radio Network Temporary Identifier (RNTI) of the second terminal equipment;

the first terminal equipment receives a first data packet from the second terminal equipment on the first resource in the first resource pool, wherein the first resource pool is used for transmitting the data packet to the cooperative terminal equipment by a source terminal equipment in uplink cooperative transmission, the first terminal equipment is the cooperative terminal equipment, and the second terminal equipment is the source terminal equipment;

The first terminal device determines that the first data packet needs to be sent to the network device according to the first data packet received on the first resource in the first resource pool;

the first terminal device sends the first data packet to the network device on the second resource in a second resource pool, and the second resource pool is used for sending the data packet from the source terminal device to the network device by the cooperative terminal device.

2. The method of claim 1, wherein prior to the first terminal device receiving the first data packet from the second terminal device on a resource in the first resource pool, the method further comprises:

the first terminal device receives first information and second information from the network device, wherein the first information is used for configuring the first resource pool, and the second information is used for configuring the second resource pool.

3. The method according to claim 1 or 2, characterized in that before the first terminal device receives the first data packet from the second terminal device on the resources in the first resource pool, the method further comprises:

the first terminal device receives third information from the network device or the second terminal device, where the third information is used to instruct the first terminal device to activate the uplink cooperative transmission.

4. A method according to claim 3, wherein the third information is received by the first terminal device from the network device; after the first terminal device receives the third information from the network device, the method further comprises:

the first terminal equipment sends fourth information to the second terminal equipment, wherein the fourth information is used for indicating the second terminal equipment to activate the uplink cooperative transmission.

5. A method according to claim 1 or 2, characterized in that,

the fifth information is used for indicating that the first resource corresponds to the second terminal device, and the first terminal device receives a first data packet from the second terminal device on a resource in a first resource pool, including:

the first terminal device receives the first data packet on the first resource; or alternatively, the first and second heat exchangers may be,

the fifth information is used for indicating the DMRS of the second terminal device, and the first terminal device receives the first data packet from the second terminal device on the resources in the first resource pool, including:

the first terminal equipment receives the first data packet from the second terminal equipment by adopting the DMRS of the second terminal equipment on the resources in the first resource pool; or alternatively, the first and second heat exchangers may be,

The fifth information is used for indicating an RNTI of the second terminal device, and the first terminal device receives a first data packet from the second terminal device on a resource in the first resource pool, including:

the first terminal device receives the first data packet from the second terminal device by using the RNTI of the second terminal device on the first resource.

6. A method according to claim 1 or 2, characterized in that,

the fifth information is used for indicating that the second resource corresponds to the second terminal device, and the first terminal device sends the first data packet to the network device on a resource in a second resource pool, including:

the first terminal device sends the first data packet to the network device on the second resource; or alternatively, the first and second heat exchangers may be,

the fifth information is used for indicating the DMRS of the second terminal device, and the first terminal device sends the first data packet to the network device on the resources in the second resource pool, including:

the first terminal equipment sends the first data packet to the network equipment by adopting the DMRS of the second terminal equipment on the resources in the second resource pool; or alternatively, the first and second heat exchangers may be,

The fifth information is used for indicating an RNTI of the second terminal device, and the first terminal device sends the first data packet to the network device on resources in the second resource pool, including:

and the first terminal equipment sends the first data packet to the network equipment by adopting the RNTI of the second terminal equipment on the resources in the second resource pool.

7. A data transmission method, comprising:

the second terminal device receives fifth information from the network device or the first terminal device, the fifth information being used to indicate at least one of the following information: the first resources in the first resource pool correspond to the second terminal equipment; or, the demodulation reference signal DMRS of the second terminal device; or, a Radio Network Temporary Identifier (RNTI) of the second terminal equipment;

the second terminal equipment determines the first resource pool, wherein the first resource pool is used for transmitting a data packet to the cooperative terminal equipment by the source terminal equipment in uplink cooperative transmission;

the second terminal equipment sends a first data packet to first terminal equipment on the first resource in the first resource pool, wherein the first terminal equipment is the cooperative terminal equipment, and the second terminal equipment is the source terminal equipment.

8. The method of claim 7, wherein the second terminal device determines a first resource pool comprising:

the second terminal device receives first information from a network device or the first terminal device, where the first information is used to configure the first resource pool.

9. The method according to claim 7 or 8, characterized in that before the second terminal device sends a first data packet to the first terminal device on a resource in the first resource pool, the method further comprises:

the second terminal device receives fourth information from the network device or the first terminal device, where the fourth information is used to instruct the second terminal device to activate the uplink cooperative transmission.

10. The method of claim 9, wherein the fourth information is received by the second terminal device from the network device, the method further comprising, after the second terminal device receives the fourth information from the network device:

and the second terminal equipment sends third information to the first terminal equipment, wherein the third information is used for indicating the first terminal equipment to activate the uplink cooperative transmission.

11. The method according to claim 7 or 8, wherein,

the fifth information is used for indicating that the first resource in the first resource pool corresponds to the second terminal device, and the second terminal device sends a first data packet to the first terminal device on the resource in the first resource pool, including:

the second terminal device sends the first data packet to the first terminal device on the first resource; or alternatively, the first and second heat exchangers may be,

the fifth information is used for indicating the DMRS of the second terminal device, and the second terminal device sends a first data packet to the first terminal device on the resources in the first resource pool, including:

the second terminal equipment transmits the first data packet to the first terminal equipment by adopting the DMRS of the second terminal equipment on the resources in the first resource pool; or alternatively, the first and second heat exchangers may be,

the fifth information is used for indicating an RNTI of the second terminal device, and the second terminal device sends a first data packet to the first terminal device on the resources in the first resource pool, including:

and the second terminal equipment sends the first data packet transmitted by adopting the RNTI of the second terminal equipment to the first terminal equipment on the resources in the first resource pool.

12. A data transmission method, comprising:

the network device sends fifth information to the first terminal device and/or the second terminal device, wherein the second terminal device is a source terminal device in uplink cooperative transmission, and the fifth information is used for indicating at least one of the following information: the first resources in the first resource pool correspond to the second terminal equipment; or, the second resource of the second resource pool corresponds to the second terminal equipment; or, the demodulation reference signal DMRS of the second terminal device; or, a Radio Network Temporary Identifier (RNTI) of the second terminal equipment;

the network device receives a first data packet from the first terminal device on the second resource of the second resource pool, wherein the second resource pool is used for transmitting the data packet from the source terminal device to the network device by the cooperative terminal device in uplink cooperative transmission, and the first terminal device is the cooperative terminal device;

the network device determines that the first data packet is forwarded by the first terminal device according to the first data packet received from the first terminal device on the second resource of the second resource pool.

13. The method of claim 12, wherein prior to the network device receiving the first data packet from the first terminal device on the resources of the second resource pool, the method further comprises:

the network device sends first information and second information, the first information is used for configuring a first resource pool, the second information is used for configuring a second resource pool, and the first resource pool is used for sending a data packet to the cooperative terminal device by the source terminal device in the uplink cooperative transmission.

14. The method according to claim 12 or 13, characterized in that before the network device receives the first data packet from the first terminal device on the resources of the second resource pool, the method further comprises:

and the network equipment sends third information to the first terminal equipment, wherein the third information is used for indicating the first terminal equipment to activate the uplink cooperative transmission.

15. The method of claim 14, wherein the method further comprises:

the network device sends fourth information to a second terminal device, where the fourth information is used to instruct the second terminal device to activate the uplink cooperative transmission, and the second terminal device is the source terminal device in the uplink cooperative transmission.

16. The method according to claim 12 or 13, wherein,

the fifth information is used for indicating that the second resource in the second resource pool corresponds to the second terminal device, and the network device receives the first data packet from the first terminal device on the resource in the second resource pool, including:

the network device receiving the first data packet from the second terminal device on the second resource from the first terminal device; or alternatively, the first and second heat exchangers may be,

the fifth information is used for indicating the DMRS of the second terminal device, and the network device receives the first data packet from the first terminal device on the resources of the second resource pool, including:

the network device receives the first data packet from the second terminal device from the first terminal device by adopting the DMRS of the second terminal device on the resource of the second resource pool; or alternatively, the first and second heat exchangers may be,

the fifth information is used for indicating an RNTI of the second terminal device, and the network device receives a first data packet from the first terminal device on a resource of a second resource pool, including:

the network device receives the first data packet transmitted with the RNTI of the second terminal device from the first terminal device on the resources of the second resource pool.

17. A data transmission apparatus, comprising:

a transceiver unit, configured to receive fifth information from the network device, where the fifth information is used to indicate at least one of the following information: the first resources in the first resource pool correspond to the second terminal equipment; or, the second resource in the second resource pool corresponds to the second terminal equipment; or, the demodulation reference signal DMRS of the second terminal device; or, a Radio Network Temporary Identifier (RNTI) of the second terminal equipment;

the transceiver unit is further configured to receive a first data packet from a second terminal device on the first resource in the first resource pool, where the first resource pool is used for a source terminal device in uplink cooperative transmission to send the data packet to a cooperative terminal device, the apparatus is the cooperative terminal device, and the second terminal device is the source terminal device;

a processing unit, configured to determine, according to receiving the first data packet on the first resource in the first resource pool, that the first data packet needs to be sent to a network device;

the transceiver unit is further configured to:

and transmitting the first data packet to the network device on the second resource in the second resource pool, wherein the second resource pool is used for transmitting the data packet from the source terminal device to the network device by the cooperative terminal device.

18. The apparatus of claim 17, wherein the transceiver unit is further configured to:

first information and second information are received from the network device before a first data packet is received from the second terminal device on resources in a first resource pool, the first information being used to configure the first resource pool, and the second information being used to configure the second resource pool.

19. The apparatus according to claim 17 or 18, wherein the transceiver unit is further configured to:

and before receiving the first data packet from the second terminal equipment on the resources in the first resource pool, receiving third information from the network equipment or the second terminal equipment, wherein the third information is used for indicating the device to activate the uplink cooperative transmission.

20. The apparatus of claim 19, wherein the third information is received by the apparatus from the network device, the transceiver unit further to:

and after receiving the third information from the network equipment, sending fourth information to the second terminal equipment, wherein the fourth information is used for indicating the second terminal equipment to activate the uplink cooperative transmission.

21. The device according to claim 17 or 18, wherein,

the fifth information is used for indicating that the first resource corresponds to the second terminal device, and the transceiver unit is specifically configured to:

receiving the first data packet on the first resource; or alternatively, the first and second heat exchangers may be,

the fifth information is used for indicating the DMRS of the second terminal device, and the transceiver unit is specifically configured to:

receiving the first data packet from the second terminal device using the DMRS of the second terminal device on resources in the first resource pool; or alternatively, the first and second heat exchangers may be,

the fifth information is used for indicating an RNTI of the second terminal device, and the transceiver unit is specifically configured to:

and receiving the first data packet from the second terminal equipment by adopting the RNTI of the second terminal equipment on the first resource.

22. The device according to claim 17 or 18, wherein,

the fifth information is used for indicating that the second resource corresponds to the second terminal device, and the transceiver unit is specifically configured to:

transmitting the first data packet to the network device on the second resource; or alternatively, the first and second heat exchangers may be,

Transmitting the first data packet to the network device on the resources in the second resource pool by adopting the DMRS of the second terminal device; or alternatively, the first and second heat exchangers may be,

and transmitting the first data packet to the network equipment by adopting the RNTI of the second terminal equipment on the resources in the second resource pool.

23. A data transmission apparatus, comprising:

a transceiver unit, configured to receive fifth information from the network device or the first terminal device, where the fifth information is used to indicate at least one of the following information: a first resource in a first resource pool corresponds to the device; or, demodulation reference signal DMRS of the apparatus; or, a radio network temporary identity, RNTI, of the apparatus;

the processing unit is used for determining the first resource pool, wherein the first resource pool is used for transmitting a data packet to the cooperative terminal equipment by the source terminal equipment in uplink cooperative transmission;

the transceiver unit is further configured to send a first data packet to a first terminal device on the resource in the first resource pool, where the first terminal device is the cooperative terminal device, and the apparatus is the source terminal device.

24. The apparatus according to claim 23, wherein the processing unit is specifically configured to:

first information is received from a network device or the first terminal device, the first information being used to configure the first resource pool.

25. The apparatus according to claim 23 or 24, wherein the transceiver unit is further configured to:

and before a first data packet is sent to the first terminal equipment on the resources in the first resource pool, fourth information is received from the network equipment or the first terminal equipment, and the fourth information is used for indicating the device to activate the uplink cooperative transmission.

26. The apparatus of claim 25, wherein the fourth information is received by the apparatus from the network device, the transceiver unit further configured to:

and after receiving the fourth information from the network equipment, sending third information to the first terminal equipment, wherein the third information is used for indicating the first terminal equipment to activate the uplink cooperative transmission.

27. The apparatus of claim 23 or 24, wherein the device comprises a plurality of sensors,

the fifth information is used for indicating that the first resource in the first resource pool corresponds to the device, and the transceiver unit is specifically configured to:

Transmitting the first data packet to the first terminal equipment on the first resource; or alternatively, the first and second heat exchangers may be,

the fifth information is used for indicating DMRS of the device, and the transceiver unit is specifically configured to:

transmitting the first data packet to the first terminal device on the resources in the first resource pool by adopting the DMRS of the device; or alternatively, the first and second heat exchangers may be,

the fifth information is used for indicating an RNTI of the device, and the transceiver unit is specifically configured to:

and sending the first data packet transmitted by adopting the RNTI of the device to the first terminal equipment on the resources in the first resource pool.

28. A data transmission apparatus, comprising:

the receiving and transmitting unit is used for sending fifth information to the first terminal equipment and/or the second terminal equipment, wherein the second terminal equipment is a source terminal equipment in uplink cooperative transmission, and the fifth information is used for indicating at least one of the following information: the first resources in the first resource pool correspond to the second terminal equipment; or, the second resource of the second resource pool corresponds to the second terminal equipment; or, the demodulation reference signal DMRS of the second terminal device; or, a Radio Network Temporary Identifier (RNTI) of the second terminal equipment;

The transceiver unit is further configured to receive a first data packet from the first terminal device on the second resource of the second resource pool, where the second resource pool is used for sending, by a cooperative terminal device in uplink cooperative transmission, a data packet from a source terminal device to the apparatus, and the first terminal device is the cooperative terminal device;

and the processing unit is used for determining that the first data packet is forwarded by the first terminal equipment according to the first data packet received from the first terminal equipment on the second resource of the second resource pool.

29. The apparatus of claim 28, wherein the transceiver unit is further configured to:

before receiving a first data packet from the first terminal device on the resource of the second resource pool, sending first information and second information, wherein the first information is used for configuring the first resource pool, the second information is used for configuring the second resource pool, and the first resource pool is used for sending the data packet to the cooperative terminal device by the source terminal device in the uplink cooperative transmission.

30. The apparatus according to claim 28 or 29, wherein the transceiver unit is further configured to:

And before receiving a first data packet from the first terminal equipment on the resources of the second resource pool, sending third information to the first terminal equipment, wherein the third information is used for indicating the first terminal equipment to activate the uplink cooperative transmission.

31. The apparatus of claim 30, wherein the transceiver unit is further configured to:

and sending fourth information to a second terminal device, wherein the fourth information is used for indicating the second terminal device to activate the uplink cooperative transmission, and the second terminal device is the source terminal device in the uplink cooperative transmission.

32. The apparatus of claim 28 or 29, wherein the device comprises a plurality of sensors,

the fifth information is used for indicating that the second resource in the second resource pool corresponds to the second terminal device, and the transceiver unit is specifically configured to:

receiving the first data packet from the second terminal device on the second resource from the first terminal device; or alternatively, the first and second heat exchangers may be,

receiving the first data packet from the second terminal device from the first terminal device using the DMRS of the second terminal device on the resources of the second resource pool; or alternatively, the first and second heat exchangers may be,

and receiving the first data packet transmitted by using the RNTI of the second terminal equipment from the first terminal equipment on the resource of the second resource pool.

33. A computer readable storage medium, characterized in that the computer readable storage medium has stored thereon a computer program which, when run on a computer, causes the computer to perform the method of any of claims 1 to 16.