WO2022121726A1 - 一种资源分配方法及装置 - Google Patents

一种资源分配方法及装置 Download PDF

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Publication number
WO2022121726A1
WO2022121726A1 PCT/CN2021/134109 CN2021134109W WO2022121726A1 WO 2022121726 A1 WO2022121726 A1 WO 2022121726A1 CN 2021134109 W CN2021134109 W CN 2021134109W WO 2022121726 A1 WO2022121726 A1 WO 2022121726A1
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WIPO (PCT)
Prior art keywords
terminal device
information
resource
signal
type
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PCT/CN2021/134109
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English (en)
French (fr)
Inventor
彭兰
李雪茹
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP21902433.8A priority Critical patent/EP4247084A4/en
Publication of WO2022121726A1 publication Critical patent/WO2022121726A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/40—Resource management for direct mode communication, e.g. D2D or sidelink
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/18—Interfaces between hierarchically similar devices between terminal devices

Definitions

  • the present application relates to the field of communication technologies, and in particular, to a resource allocation method and apparatus.
  • SL communication technology is an important branch of cellular Internet of Things technology. It is a communication technology that is directly connected between terminal devices and terminal devices. ). This communication technology has created broad application prospects for IoT applications.
  • V2X vehicle-to-everything
  • V2X vehicle-to-everything
  • Spectrum resources occupied by sidelinks can be divided into two categories: licensed spectrum (license spectrum) and unlicensed spectrum (unlicense spectrum).
  • licensed spectrum is strictly restricted and protected, and when two terminal devices communicate on the licensed spectrum, they need to rely on the resource scheduling of the network device.
  • the unlicensed spectrum is open and can be used to improve performance and speed.
  • a terminal device group can be formed by a group header (GH) terminal device and a group member (GM) terminal device.
  • the role of the group head terminal device is similar to that of the network device, and it can schedule resources for communication between any two group member terminal devices in the group.
  • the first terminal device when the first terminal device needs to send information to the second terminal device, it needs to first request resources from the network device or the group head terminal device, and then send information on the requested resources. If the second terminal device also needs to feed back information to the first terminal device at this time, the second terminal device also needs to request resources from the network device or the group head terminal device, and feed back information on the requested resources. That is, if two terminal devices exchange information, each terminal device needs to request resources before sending information to the opposite end, which increases signaling overhead and delay.
  • the present application provides a resource allocation method and apparatus for reducing signaling overhead and communication delay in a scenario where information/signals are exchanged between a first terminal device and a second terminal device.
  • the present application provides a resource allocation method, the method includes: a first terminal device sends a resource request to a first device, the resource request is used to request a first resource and a second resource, and the first resource is used for the first terminal The device sends the first signal to the second terminal device, and the second resource is used for the first terminal device to receive the second signal from the second terminal device; the first terminal device receives the resource response of the first device in response to the resource request.
  • the first terminal device before sending the first signal to the second terminal device, the first terminal device requests the first device for the first resource for the first terminal device to send the first signal, and requests the second terminal device to send the second signal Therefore, when the second terminal device sends the second signal to the first terminal device, it does not need to request the resource from the first device again, but can use the second resource requested by the first terminal device for the second terminal device. It helps to reduce the signaling overhead between the second terminal equipment and the first apparatus, and also reduces the communication delay of the interaction between the first terminal equipment and the second terminal equipment.
  • the first apparatus may be a group head terminal device.
  • the group head terminal device, the first terminal device and the second terminal device may be A terminal equipment group is formed, and the terminal equipment at the head of the group can schedule unlicensed spectrum resources for the terminal equipment of other members in the terminal equipment group, which is helpful to realize the flexibility of resource scheduling and improve the performance and transmission of the communication system. rate.
  • the first device may be a network device, the first terminal device and the second terminal device are in a cell served by the network device, and the network device may be the first The terminal device and the second terminal device schedule resources for communication therebetween.
  • This implementation can be applied to a V2X mode 1 (mode-1) scenario.
  • the resource request includes the first signal.
  • the data amount of the first data, and/or the data amount of the second data in the second signal is the first apparatus.
  • the first apparatus can directly determine the amount of resources allocated to the first terminal device according to the data volume of the first data in the resource request, and determine the resources allocated to the second terminal device according to the data volume of the second data in the resource request It helps to improve the accuracy of resource allocation.
  • the resource request includes the type of the first signal, and/or the feedback type of the second signal.
  • the first apparatus may determine how to allocate the multiple terminal devices based on the type of the first signal and/or the feedback type of the second signal in the resource request of each terminal device resource.
  • the first terminal device includes pre-configuration information, the pre-configuration information includes a plurality of index information, and each index information corresponds to a preset resource; the resource request includes first index information, and the first index information is a plurality of index information One of the first resources is a preset resource corresponding to the first index information.
  • the first device can determine the resources allocated for the first terminal device according to the first index information included in the resource request and the corresponding relationship in the pre-configuration information, and the first index information occupies fewer bits, which helps to reduce the number of first index information.
  • this method may be applicable to an implementation manner in which the first terminal device requests the first device for resources for sending reference signals, and the first terminal device may determine an index corresponding to the resources required for sending reference signals, so that the first device allocates resources for the first device The resource for the terminal equipment to send the reference signal.
  • the pre-configuration information further includes multiple types, and each type corresponds to at least one index information;
  • the type of the first signal is included, where the type of the first signal is one of multiple types, and the first index information is one of at least one index information corresponding to the type of the first signal.
  • the first resource is indicated by two dimensions (ie, type and index), which can further reduce the signaling overhead when the first terminal device sends a resource request.
  • the resource request further includes feedback information of the second signal
  • the feedback information of the second signal includes a feedback type of the second signal and a feedback element corresponding to the feedback type of the second signal.
  • the first device can predict the data amount of the data in the second signal according to the feedback information of the second signal and the feedback element corresponding to the feedback type of the second signal, and then determine the second terminal according to the data amount of the data in the second signal
  • the amount of resources allocated by the device helps to improve the accuracy of resource allocation.
  • the resource request further includes feedback time information, where the feedback time information is used to indicate time domain resources and/or periodic resources that bear the second signal.
  • the time domain resources and/or periodic resources allocated by the first apparatus to the second terminal equipment can meet the requirement of the first terminal equipment to expect the second terminal equipment to feed back the second signal, which is helpful to improve the performance of the first terminal equipment and the second terminal equipment. Reliability of communication between end devices.
  • the method further includes: the first terminal device sends control information to the second terminal device, wherein the control information includes the first indication information and/or the second indication information obtained by the first terminal device from the resource response, the first One indication information indicates the resource for the first terminal device to send the first signal, and the second indication information indicates the resource for the first terminal device to receive the second signal.
  • the first terminal device can indicate to the second terminal device the resources for the first terminal device to send the first signal, which helps the second terminal device to accurately receive the first signal.
  • the first terminal device may also indicate to the second terminal device the resources for the second terminal device to send the second signal, so that the second terminal device can send the second signal on the corresponding resource, so that the second terminal device does not need to request resources from the first device , which helps to reduce the signaling overhead between the second terminal equipment and the first device, and can reduce the communication delay of the exchanged signals between the first terminal equipment and the second terminal equipment. Further, the second terminal equipment does not need to Indicating the resources of the second terminal device to send the second signal to the first terminal device helps to reduce the signaling overhead between the first terminal device and the second terminal device, and the first terminal device does not need to blindly detect data from the second terminal device control information to reduce the power consumption of the first terminal device.
  • control information further includes a preset feedback type
  • the feedback type of the second signal is the same as the preset feedback in the control information. same type.
  • the first terminal device can instruct the second terminal device to feed back the feedback type of the second signal, which helps to improve the reliability of the communication between the first terminal device and the second terminal device.
  • the eleventh optional implementation manner of the first aspect further includes: the first terminal device sends the first signal to the second terminal device according to the first indication information in the resource response, and/or the first terminal device receives the second indication information in the resource response A second signal from a second terminal device.
  • the first terminal device sends the first signal to the second terminal device based on the first indication information
  • the second terminal device receives the first signal from the first terminal device based on the first indication information
  • the second terminal device is based on the first indication information.
  • the second indication information sends the second signal to the first terminal device
  • the first terminal device receives the second signal from the second terminal device based on the second indication information, which can improve the reliability of communication between the two.
  • the first terminal device sends a first signal to the second terminal device, and the first signal can trigger the second terminal device to send the second signal to the first terminal device.
  • This implementation manner may be applicable to, for example, channel state information (channel state information, CSI) measurement scenarios, positioning measurement scenarios, auxiliary information feedback scenarios, power control information feedback scenarios, data interaction scenarios, and the like.
  • the feedback type includes at least one or more of channel state type, positioning information type, auxiliary information type, and power control type; wherein, the feedback element corresponding to the channel state type includes at least a precoding matrix indicator (precoding matrix indicator).
  • the feedback element corresponding to the positioning information type at least includes round trip time (round trip time, RTT), One or more of the angle of arrival (AoA) and angle of departure (AoD);
  • the feedback elements corresponding to the auxiliary information type include at least resource ID (resource ID), reference signal received power (reference signal) One or more of received power, RSRP) and signal to interference and noise ratio (SINR);
  • the feedback element corresponding to the power control type includes at least signal power and/or interference power.
  • the present application provides a resource allocation method, the method comprising: a first device receives a resource request from a first terminal device, the resource request is used to request a first resource and a second resource, and the first resource is used for the first resource
  • the terminal device sends the first signal to the second terminal device, and the second resource is used for the first terminal device to receive the second signal from the second terminal device; the first apparatus sends a resource response to the first terminal device in response to the resource request.
  • the method includes any optional implementation manner from the first optional implementation manner of the first aspect to the thirteenth optional implementation manner of the first aspect.
  • an embodiment of the present application provides a communication device, the device has the function of implementing the first terminal device in the first aspect or any optional implementation manner of the first aspect, the device may be a terminal device, or It can be a chip included in the terminal device.
  • the communication device may also have the function of implementing the first device in the second aspect or any optional implementation manner of the second aspect, and the device may be a network device, or a chip included in the network device, or the The apparatus may be a terminal device or a chip included in the terminal device.
  • the functions of the above communication apparatus may be implemented by hardware, or by executing corresponding software in hardware, and the hardware or software includes one or more modules or units or means corresponding to the above functions.
  • the structure of the apparatus includes a processing module and a transceiver module, wherein the processing module is configured to support the apparatus to execute the first aspect or the first terminal in any implementation manner of the first aspect
  • the corresponding functions of the device or perform the corresponding functions of the first apparatus in the second aspect or any implementation manner of the second aspect.
  • the transceiver module is used to support communication between the device and other communication devices. For example, when the device is a first terminal device, it can send a resource request to the first device.
  • the communication device may also include a storage module, which is coupled to the processing module and stores necessary program instructions and data of the device.
  • the processing module may be a processor
  • the communication module may be a transceiver
  • the storage module may be a memory
  • the memory may be integrated with the processor, or may be provided separately from the processor.
  • the structure of the apparatus includes a processor, and may also include a memory.
  • the processor is coupled to the memory and can be used to execute computer program instructions stored in the memory, so that the apparatus executes the method in the above-mentioned first aspect or any optional implementation manner of the first aspect, or performs the above-mentioned second aspect or the second aspect A method in any optional implementation of the aspect.
  • the apparatus further includes a communication interface to which the processor is coupled.
  • the communication interface can be a transceiver or an input/output interface; when the device is a chip included in the network device or a chip included in the terminal device, the communication interface can be the input of the chip /Output Interface.
  • the transceiver may be a transceiver circuit, and the input/output interface may be an input/output circuit.
  • an embodiment of the present application provides a chip system, including: a processor, where the processor is coupled to a memory, and the memory is used to store a program or an instruction, when the program or instruction is executed by the processor , so that the chip system implements the method in the first aspect or any optional implementation manner of the first aspect, or implements the method in the second aspect or any optional implementation manner of the second aspect.
  • the chip system further includes an interface circuit, and the interface circuit is used to exchange code instructions to the processor.
  • processors in the chip system, and the processors may be implemented by hardware or software.
  • the processor may be a logic circuit, an integrated circuit, or the like.
  • the processor may be a general-purpose processor implemented by reading software codes stored in memory.
  • the memory can be integrated with the processor, or can be provided separately from the processor.
  • the memory may be a non-transitory processor, such as a read-only memory ROM, which may be integrated with the processor on the same chip, or may be provided on different chips.
  • an embodiment of the present application provides a computer-readable storage medium on which a computer program or instruction is stored, and when the computer program or instruction is executed, causes the computer to execute the first aspect or any one of the first aspects.
  • a method in an optional implementation manner, or the second aspect or the method in any optional implementation manner of the second aspect is performed.
  • an embodiment of the present application provides a computer program product that, when a computer reads and executes the computer program product, causes the computer to execute the method in the first aspect or any optional implementation manner of the first aspect , or execute the method in the second aspect or any optional implementation manner of the second aspect.
  • an embodiment of the present application provides a communication system, where the communication system includes a first terminal device, a second terminal device, and a first device, where the first terminal device is configured to perform the first aspect or any one of the first aspect.
  • the first apparatus is configured to execute the method in the second aspect or any optional implementation manner of the second aspect.
  • FIG. 1 is a schematic diagram of a communication system architecture provided by the present application.
  • FIG. 2 is a schematic flowchart of a method for information transmission provided by the present application
  • FIG. 3 is a schematic diagram of another communication system architecture provided by the present application.
  • FIG. 5 is a schematic diagram of a group of V2X scenarios provided by the present application.
  • FIG. 6 is a schematic diagram of a family scene provided by the present application.
  • FIG. 7 is a schematic flowchart of a resource allocation method provided by the present application.
  • FIG. 8 is a schematic diagram of fields included in a resource request provided by the present application.
  • FIG. 10 is a schematic flowchart of a signal interaction between a first terminal device and a second terminal device provided by the application;
  • FIG. 11 is another schematic flowchart of a signal interaction between a first terminal device and a second terminal device provided by the present application;
  • FIG. 13 is a schematic diagram of another resource allocation provided by this application.
  • FIG. 15 is a schematic structural diagram of another communication apparatus provided by the present application.
  • Terminal equipment a terminal equipment is a device with wireless transceiver function, which can be a fixed device, a mobile device, a handheld device (such as a mobile phone), a wearable device, a vehicle-mounted device, or a wireless device built into the above-mentioned device (for example, communication module, modem, or system-on-chip, etc.).
  • the terminal device is used to connect people, things, machines, etc., and can be widely used in various scenarios, such as but not limited to the following scenarios: cellular communication, device-to-device communication (device-to-device, D2D), vehicle-to-everything (vehicle to everything, V2X), machine-to-machine/machine-type communications (M2M/MTC), Internet of things (internet of things, IoT), virtual reality (virtual reality, VR) , Augmented reality (AR), industrial control (industrial control), unmanned driving (self driving), telemedicine (remote medical), smart grid (smart grid), smart furniture, smart office, smart wear, smart transportation , terminal equipment for smart city, drone, robot and other scenarios.
  • the terminal equipment may sometimes be referred to as user equipment (UE), a terminal, an access station, a UE station, a remote station, a wireless communication device, a user equipment, or the like.
  • Network equipment including, for example, access network (AN) equipment, such as a base station (for example, an access point), may refer to a device in the access network that communicates with terminal equipment through one or more cells on the air interface, Or, for example, a network device in a V2X technology is a road side unit (RSU).
  • the base station may be used to convert received air frames to and from Internet Protocol (IP) packets and act as a router between the terminal device and the rest of the access network, which may include the IP network.
  • IP Internet Protocol
  • the RSU can be a fixed infrastructure entity supporting V2X applications and can exchange messages with other entities supporting V2X applications.
  • the network device can also coordinate the attribute management of the air interface.
  • the network equipment may include an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in the LTE system or long term evolution-advanced (LTE-A), or may also be included in the 5G NR system
  • NodeB or eNB or e-NodeB, evolutional Node B in the LTE system or long term evolution-advanced (LTE-A)
  • LTE-A long term evolution-advanced
  • the next generation node B may also include the centralized unit (centralized unit, CU) and distributed unit (distributed unit) in the cloud radio access network (cloud radio access network, Cloud RAN) system, DU), the embodiments of the present application are not limited.
  • a terminal equipment group which is a terminal equipment group composed of multiple terminal equipments, and any two terminal equipments in the terminal equipment group can exchange sideline information through a sidelink link.
  • the terminal equipment group includes a group head terminal equipment and a group member terminal equipment.
  • the group head terminal equipment sends a synchronization signal block (SSB) to the group member terminal equipment, it can save energy by reducing the transmission power.
  • the member terminal equipment can only monitor the SSB of the group head terminal equipment to maintain synchronization without receiving other synchronization information outside the group, thereby maintaining uniqueness and energy saving.
  • SSB synchronization signal block
  • Each terminal device group corresponds to its own resource pool, and the group head terminal device in the terminal device group can uniformly allocate resources in the resource pool, which helps to improve resource allocation efficiency.
  • the group head terminal equipment in the terminal equipment group can measure the channel information, service load, etc. of each group member terminal equipment in the group, which helps to better control the sidelinks in the group.
  • the base station allocates its own resource pool for each terminal equipment group, and the group head terminal equipment in each terminal equipment group can uniformly allocate the resources in the resource pool, and the group member terminal equipment does not need to request resources from the base station. , reduce the air interface delay.
  • V2X which specifically includes communication between vehicles, communication between vehicles and people (including pedestrians, cyclists, drivers, or passengers), and communication between vehicles and network devices.
  • the terminal equipment (also referred to as the transmitting terminal equipment) as the transmitting end sends sideline information to the terminal equipment (also called the receiving terminal equipment) as the receiving end, and the receiving terminal equipment receives and decodes the sideline information.
  • the terminal equipment also referred to as the transmitting terminal equipment
  • the receiving terminal equipment receives and decodes the sideline information.
  • there are two resource allocation modes for transmitting terminal equipment one of which is mode 1 (mode-1), in which the base station allocates resources for transmitting terminal equipment; the other resource allocation mode For mode-2, the sending terminal equipment selects or competes for resources by itself in mode-2.
  • mode-1 is mainly applied to V2X communication in the case of network coverage, and resource allocation is performed by the base station.
  • mode-1 may further include a dynamic grant (DG) mode and a preconfigured grant (CG) mode.
  • DCI downlink control information
  • CG preconfigured grant
  • the base station will schedule the sending terminal equipment to send sideline information to the receiving terminal equipment through downlink control information (DCI).
  • DCI downlink control information
  • the base station will configure the relevant sideline time-frequency resources through high-layer signaling, such as radio resource control (radio resource control, RRC) signaling.
  • RRC radio resource control
  • mode-2 the selection of the sideline time-frequency resource by the transmitting terminal device does not depend on the base station. This mode is not limited by network coverage, and in the absence of network coverage, the sending terminal device can also use this mode to communicate.
  • Resources also known as time-frequency resources, include time-domain resources and frequency-domain resources, wherein frequency-domain resources can be one or more resource blocks (resource blocks, RB), or one or more resource units ( resource element, RE), or one or more carriers (carrier), or one or more bandwidth parts (BWP), etc.
  • the time domain resource may be one or more subframes, or one or more time slots, or one or more symbols on one or more time slots, or the like.
  • system and “network” in the embodiments of the present application may be used interchangeably.
  • At least one means one or more, and “plurality” means two or more.
  • And/or which describes the association relationship of the associated objects, indicates that there can be three kinds of relationships, for example, A and/or B, which can indicate: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the associated objects are an “or” relationship.
  • At least one item(s) below” or similar expressions thereof refer to any combination of these items, including any combination of single item(s) or plural items(s).
  • At least one (a) of a, b, or c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c may be single or multiple .
  • the method provided in this application can be applied to various communication systems, for example, it may be a long term evolution (LTE) system, a fifth generation (5G) communication system, or a hybrid architecture of LTE and 5G, It can also be a 5G new radio (new radio, NR) system, and a new communication system that will appear in the future communication development.
  • LTE long term evolution
  • 5G fifth generation
  • NR new radio
  • FIG. 1 exemplarily provides a communication system for this application, wherein a network device and three terminal devices (represented by terminal device 1 to terminal device 3 respectively) form a single-cell communication system, and terminal device 1 to terminal device 3 constitute a single-cell communication system.
  • Uplink information can be sent to network devices separately or simultaneously, network devices can send downlink information to terminal device 1 to terminal device 3 separately or simultaneously, and sideline information can also be sent to each other between terminal device 1 and terminal device 3 .
  • FIG. 1 is only an exemplary illustration, and does not specifically limit the number of terminal devices included in the communication system, the number of network devices, and the number of cells covered by the network devices.
  • sideline information can be transmitted between any two terminal devices.
  • the terminal device used for sending sideline information in the two terminal devices can be referred to as the first terminal device (or the sending terminal device).
  • Tx UE the terminal device for receiving sideline information
  • the second terminal device or receiving terminal device, Rx UE.
  • the first terminal device and the second terminal device may be any two of the terminal devices 1 to 3 in FIG. 1, respectively, for example, the first terminal device and the second terminal device may be the terminal device 1 and the terminal device, respectively. 3.
  • the first terminal device and the second terminal device may be terminal device 1 and terminal device 2, respectively.
  • Step 201 the first terminal device sends an uplink scheduling request (scheduling request, SR) to the network device.
  • the network device receives the SR, and determines an uplink resource for the first terminal device to send a buffer state report (buffer state report, BSR).
  • buffer state report buffer state report
  • Step 202 the network device sends the first DCI to the first terminal device.
  • the first terminal device receives the first DCI, and determines the uplink resource for sending the BSR from the first DCI.
  • Step 203 the first terminal device sends a BSR to the network device through the uplink resource, where the BSR is used to indicate the data amount of the sideline information sent by the first terminal device to the second terminal device.
  • the network device receives the BSR through the uplink resource, and determines, according to the BSR, a sidelink resource for the first terminal device to send the sidelink information to the second terminal device.
  • Step 204 the network device sends the second DCI to the first terminal device.
  • the first terminal device receives the second DCI, and determines, from the second DCI, a sideline resource for sending sideline information to the second terminal device.
  • Step 205 the first terminal device sends sideline information to the second terminal device through the sideline resource.
  • the second terminal device receives the sideline information through the sideline resource.
  • the sideline information includes sideline control information and/or sideline data information
  • the first terminal device sends the sideline information to the second terminal device, which can also be understood as the first terminal device sends the sideline control information to the second terminal device. and/or sideline data information, or it can be understood that the first terminal device sends PSCCH (physical sidelink control channel, physical bypass control channel) and/or PSSCH (physical sidelink share channel, physical bypass shared channel) to the second terminal device ).
  • the second terminal equipment receives sidelink control information and/or sidelink data information from the first terminal equipment through sidelink resources, or receives PSCCH and/or PSSCH from the first terminal equipment through sidelink resources.
  • Step 206 the second terminal device sends a hybrid automatic repeat request (HARQ) to the first terminal device.
  • HARQ hybrid automatic repeat request
  • FIG. 3 exemplarily provides another communication system for this application, wherein a group head terminal device (represented by terminal device 0) and three group member terminal devices (respectively represented by terminal device 1 to terminal device 3) form a terminal A device group, in which the group head terminal device can act as part of the network device and is used to manage multiple group member terminal devices.
  • the group head terminal equipment is also a kind of terminal equipment, but it only has the functions of some network equipment, such as central control, resource configuration and data reception.
  • Terminal equipment 1 to terminal equipment 3 can send sideline information to the group head terminal equipment respectively or simultaneously, and the group head terminal equipment can respectively or simultaneously send sideline information to terminal equipment 1 to terminal equipment 3, and terminal equipment 1 to terminal equipment 3. They can also send sideline information to each other.
  • FIG. 3 is only an exemplary illustration, and does not specifically limit the number of terminal device groups in the communication system, and the number of group member terminal devices and group head terminal devices included in each terminal device group.
  • sideline information can be transmitted between any two group member terminal devices.
  • the group member terminal device used for sending sideline information among the two group member terminal devices can be referred to as the first terminal. equipment, and the group member terminal equipment for receiving sideline information is referred to as the second terminal equipment.
  • the first terminal device and the second terminal device may be any two of the terminal device 1 to the terminal device 3 in FIG. 3 , for example, the first terminal device and the second terminal device may be the terminal device 1 and the terminal device respectively. 3.
  • the first terminal device and the second terminal device may be terminal device 1 and terminal device 2, respectively.
  • the first terminal device no longer requests sideline resources from the network device, but requests sideline resources from the group head terminal device, specifically:
  • Step 401 the first terminal device sends an SR to the group head terminal device.
  • the group head terminal device receives the SR, and determines the first sideline resource for the first terminal device to send the BSR.
  • Step 402 The group head terminal device sends first sidelink control information (SCI) to the first terminal device.
  • SCI sidelink control information
  • the first terminal device receives the first SCI, and determines the first sideline resource for sending the BSR from the first SCI.
  • Step 403 the first terminal device sends a BSR to the group head terminal device, where the BSR is used to indicate the data amount of the sideline information sent by the first terminal device to the second terminal device.
  • the group head terminal device receives the BSR, and determines, according to the BSR, a second sideline resource for the first terminal device to send the sideline information to the second terminal device.
  • Step 404 the group head terminal device sends the second SCI to the first terminal device.
  • the first terminal device receives the second SCI, and determines, from the second SCI, a second sideline resource for sending sideline information to the second terminal device.
  • Step 405 the first terminal device sends sideline information to the second terminal device through the second sideline resource.
  • the second terminal device receives the sideline information through the second sideline resource.
  • the sideline information includes sideline control information and/or sideline data information
  • the first terminal device sends the sideline information to the second terminal device, which can also be understood as the first terminal device sends the sideline control information to the second terminal device. and/or sideline data information, or it can be understood that the first terminal device sends PSCCH and/or PSSCH to the second terminal device.
  • the second terminal equipment receives sidelink control information and/or sidelink data information from the first terminal equipment through the second sidelink resources, or receives PSCCH and/or PSCCH from the first terminal equipment through the second sidelink resources. PSSCH.
  • Step 406 the second terminal device sends HARQ to the first terminal device.
  • FIG. 5 is a schematic diagram of a set of V2X scenarios.
  • vehicle A is the first terminal device
  • vehicle B is the second terminal device
  • vehicle A requests side-travel resources from a network device (such as RSU)
  • vehicle A is based on the requested side-travel resources.
  • the resource sends side-travel information to vehicle B
  • vehicle B sends HARQ to vehicle A in response to the side-travel information of vehicle A.
  • vehicle A, vehicle B, and vehicle C form a terminal equipment group
  • vehicle A is the first terminal equipment
  • vehicle B is the second terminal equipment
  • vehicle C is the group head terminal equipment
  • vehicle A requests side-travel resources from vehicle C
  • vehicle A sends side-travel information to vehicle B based on the requested side-travel resources
  • vehicle B sends HARQ to vehicle A in response to the side-travel information of vehicle A.
  • FIG. 6 is a schematic diagram of a home scenario.
  • a user needs to project video data on a tablet onto a TV.
  • a mobile phone, a TV, and a tablet form a terminal device group
  • the tablet is the first terminal device
  • the TV is the first terminal device.
  • the mobile phone is the group head terminal device
  • the tablet requests sideline resources from the mobile phone, sends sideline information (ie video data) to the TV based on the sideline resources
  • the TV responds to the sideline information of the tablet and sends to the tablet HARQ.
  • the first terminal device sends sideline information to the second terminal device based on the scheduling of the network device or the group head terminal device, and the second terminal device sends HARQ to the first terminal device in response to the sideline information.
  • the data amount of the HARQ is small, and the second terminal device may carry the HARQ in a physical sidelink feedback channel (PSFCH) when sending the HARQ.
  • PSFCH physical sidelink feedback channel
  • the PSFCH occupies the lateral resources requested by the first terminal device. It can also be understood that when the first terminal equipment requests sidelink resources, since the amount of HARQ data is small, it can directly request the sidelink resources including the HARQ feedback from the second terminal equipment, so that the second terminal equipment can feedback HARQ.
  • the second terminal device needs to feed back other information except HARQ to the first terminal device
  • the data volume of the other information is relatively large, and the second terminal device needs to further request the network device or the group head terminal device to the side
  • the second terminal device also needs to go through the above steps 201 to 204 or the above steps 401 to 404 first.
  • both the first terminal device and the second terminal device need to request sideline resources from the network device or the group head terminal device before sending their respective sideline information, which increases the duration of the entire interaction process.
  • the first terminal device can not only send sideline control information and/or sideline data information to the second terminal device, but also can send reference signals, such as positioning measurement reference signals, channel state information reference signals, to the second terminal device. (channel state information-reference signal, CSI-RS), etc., the sideline control information, sideline data information, and reference signal sent by the first terminal device to the second terminal device may all be referred to as the first signal.
  • the second terminal device may also send a second signal to the first terminal device, where the second signal may be sideline control information, or sideline data information, or a reference signal.
  • the link loop scene can have two situations:
  • the first signal is related to the second signal, the first terminal device sends the first signal to the second terminal device, and the second terminal device can determine the second signal according to the received first signal, and then send it to the first terminal device. second signal.
  • Example 1 a channel state information measurement scenario.
  • the first terminal device sends the CSI-RS (ie, the first signal), and the second terminal device measures the CSI-RS to obtain channel state information, and sends the channel state information (ie, the second signal) to the first terminal device.
  • the CSI-RS ie, the first signal
  • the second terminal device measures the CSI-RS to obtain channel state information, and sends the channel state information (ie, the second signal) to the first terminal device.
  • the channel state information is used to indicate the channel state between the first terminal device and the second terminal device, and the channel state information is, for example, 3I information, and the 3I information specifically includes PMI, CQI, and RI.
  • the second terminal device may measure the CSI-RS after detecting the CSI-RS of the first terminal device, that is, the measurement by the second terminal device is triggered based on the CSI-RS sent by the first terminal device.
  • the measurement of the second terminal device may also be triggered based on the sideline information sent by the first terminal device.
  • the second terminal device measures the CSI sent by the first terminal device. -RS, get channel state information. That is, in this link loop scenario, the first terminal device sends sideline information to the second terminal device, and the second terminal device sends channel state information to the first terminal device.
  • the second terminal device measures the CSI-RS of the first terminal device to obtain the channel state information, and feeds back the channel state information to the first terminal device.
  • the first terminal device can determine the relationship between the first terminal device and the first terminal device based on the received channel state information.
  • the channel status between the two terminal devices determines whether to continue to send the sideline information, or which type of sideline information to send preferentially.
  • the sideline information may specifically be sideline data information, such as web page data, video data, audio data, and the like.
  • the first terminal device sends sideline information to the second terminal device, and the second terminal device sends channel state information to the first terminal device. It can be considered that the first signal sent by the first terminal device to the second terminal device is Side row information, at this time the first signal and the second signal are irrelevant. Of course, it can also be understood that the first signal sent by the first terminal device to the second terminal device is still the CSI-RS, and at this time, the first signal and the second signal are related.
  • the first terminal device sends a positioning measurement reference signal (ie, the first signal)
  • the second terminal device measures the positioning measurement reference signal sent by the first terminal device to obtain positioning measurement information, and sends the positioning measurement information (ie, the second terminal device) to the first terminal device.
  • the positioning measurement information such as RTT, AoA, AoD, etc.
  • the second terminal device may measure the positioning measurement reference signal after detecting the positioning measurement reference signal of the first terminal device, that is, the measurement of the second terminal device is triggered based on the positioning measurement reference signal sent by the first terminal device.
  • the measurement by the second terminal device may also be triggered based on the sideline information sent by the first terminal device.
  • the second terminal device measures the positioning sent by the first terminal device.
  • the reference signal is measured to obtain the positioning measurement information.
  • Example 3 auxiliary information feedback scenario.
  • the first terminal device sends an auxiliary resource selection request (ie, a first signal) to the second terminal device, where the auxiliary resource selection request is used to instruct the second terminal device to assist the first terminal device in selecting sideline resources in the resource pool.
  • the auxiliary resource selection request is an indication message for configuring/triggering feedback from the second terminal device, and the auxiliary resource selection request includes reporting time domain type indication, measurement set indication, reporting content type indication, measurement threshold, sending mechanism, etc.
  • the second terminal device detects the sideline resources that meet the requirements in the resource pool according to the reporting time domain type indication, measurement set indication, reporting content type indication, measurement threshold, transmission mechanism, etc. in the auxiliary resource selection request, and generates auxiliary The resource selection information (ie, the second signal) is sent to the first terminal device.
  • the first signal may also be a zero power reference signal (zero power CSI-RS), and the zero power reference signal is used by the second terminal device to measure the interference of adjacent groups or different systems.
  • the second terminal device measures The zero-power reference signal obtains the interference situation of adjacent groups or different systems to generate auxiliary resource selection information (ie, the second signal).
  • the auxiliary resource selection information includes one or more of a resource identifier (resource index), RSRP, and SINR.
  • Example 4 power control information feedback scenario.
  • the first terminal device When the first terminal device enters the distributed power control mode, the first terminal device sends a power control assistance request (ie, a first signal) to the second terminal device, and the second terminal device responds to the power control assistance request by changing the signal power, interference
  • a power control assistance request ie, a first signal
  • the second terminal device responds to the power control assistance request by changing the signal power, interference
  • the power and the like are sent to the first terminal device as power control assistance information (ie, the second signal).
  • Case 2 The first signal has nothing to do with the second signal, the first terminal device sends the first signal to the second terminal device, the second terminal device determines the second signal, and then sends the second signal to the first terminal device.
  • the first terminal device sends the first signal to the second terminal device
  • the second terminal device determines the second signal, and then sends the second signal to the first terminal device.
  • the first terminal device sends sideline data information (ie, the first signal) to the second terminal device
  • the second terminal device sends sideline data information (ie, the second signal) to the first terminal device.
  • Example 6 channel state information measurement scenario.
  • the first terminal device sends the sideline data information (ie the first signal) to the second terminal device, the second terminal device measures the CSI-RS to obtain the channel state information, and sends the channel state information (ie the second signal) to the first terminal device ).
  • the sideline data information ie the first signal
  • the second terminal device measures the CSI-RS to obtain the channel state information, and sends the channel state information (ie the second signal) to the first terminal device.
  • Example 7 auxiliary information feedback scenario.
  • the first terminal device sends an auxiliary resource selection request (ie, a first signal) to the second terminal device, where the auxiliary resource selection request is used to instruct the second terminal device to assist the first terminal device in selecting sideline resources in the resource pool.
  • the auxiliary resource selection request is a trigger indication.
  • the second terminal device detects the sideline resources that meet the requirements in the resource pool, and generates auxiliary resource selection information (ie second signal) and sent to the first terminal device.
  • first signals and second signals there may be unrelated first signals and second signals, as described in Example 6 and Example 7 above.
  • first signal and the second signal are not related, and this application will not give examples one by one.
  • the present application provides a resource allocation method, and the resource allocation method is implemented by a first device, a first terminal device, and a second terminal device.
  • the resource allocation method may be applied to the architecture of FIG. 1 or FIG. 3 .
  • the first apparatus, the first terminal device, and the second terminal device may be the network device, the terminal device 1, and the terminal as shown in FIG. 1 , respectively. device 2.
  • the first apparatus, the first terminal device, and the second terminal device may be terminal device 0 (group head terminal device), terminal device 1 and terminal device 2 as shown in FIG. 3 , respectively.
  • the first terminal device requests the first device to simultaneously request the first terminal device to send the first signal to the second terminal device (referred to as the sending resource, or the first resource) and the first terminal device to send the first signal from the second terminal device.
  • the resource for receiving the second signal at the terminal device (referred to as the receiving resource, or the second resource).
  • the first resource is used by the first terminal device to send the first signal to the second terminal device
  • the second resource is used by the first terminal device to receive the second signal from the second terminal device.
  • the first terminal device will indicate the resources requested by the second terminal device to the second terminal device, so that the second terminal device can send the second signal to the first terminal device without requesting resources from the first device, Helps reduce communication delay.
  • the resource for the first terminal device to receive the second signal from the second terminal device can also be understood as the resource for the second terminal device to send the second signal to the first terminal device.
  • the second terminal device receives the second signal from the second terminal device.
  • the resource for receiving the first signal at a terminal device may also be understood as the resource for the first terminal device to send the first signal to the second terminal device.
  • FIG. 7 is a schematic flowchart of a resource allocation method exemplarily provided by this application, as shown in FIG. 7 :
  • Step 701 the first terminal device sends a resource request to the first device, where the resource request is used to request a first resource and a second resource, the first resource is used by the first terminal device to send a first signal to the second terminal device, the second The resources are used for the second terminal device to send the first signal to the first terminal device.
  • the resource request includes first request information and second request information, where the first request information is used to indicate the first resource requested by the first terminal device for the first terminal device, and the second request information is used to indicate the first terminal device The second resource requested for the second terminal device.
  • the first terminal device may determine the first request information based on the first signal to be sent.
  • the first terminal device may determine (or predict) the second signal to be received based on the first signal to be sent, and then determine the second request information according to the second signal.
  • the first terminal device may determine the first request information according to the type of the first signal and/or the amount of data in the first signal.
  • the first signal is a reference signal (referred to as a first reference signal), and the first terminal device determines the first request information according to the type of the first reference signal.
  • the first reference signal is a CSI-RS
  • the first terminal device may include the type corresponding to the CSI-RS in the first request information to instruct the first device to allocate a side row for sending the CSI-RS to the first terminal device resource.
  • the first signal is specifically sideline data information (referred to as first data), and the first terminal device determines the first request information according to the data volume of the first data. For example, if the data volume of the first data is 100 bits, the first terminal device may include 100-bit indication information in the first request information to instruct the first device to allocate a side row for sending 100 bits of data to the first terminal device resource.
  • the first terminal device determines the second signal to be received based on the first signal to be sent, at least the following examples can be used: (1) The first signal is a CSI-RS, or the first signal carries the first data , the first terminal device may determine that the second signal is channel state information. (2) The first signal is a positioning measurement reference signal, or the first signal carries the first data, and the first terminal device may determine that the second signal carries the positioning measurement information. (3) The auxiliary resource selection request is carried in the first signal, and the first terminal device may determine that auxiliary resource selection information is carried in the second signal. (4) The first signal carries the power control assistance request, and the first terminal device may determine that the second signal carries the power control assistance information. (5) The first signal is used to trigger the second terminal device to send a positioning measurement reference signal or CSI-RS to the first terminal device, and the first terminal device may determine that the second signal is a positioning measurement reference signal or CSI-RS.
  • the second signal may be a reference signal (referred to as a second reference signal), and the first terminal device may determine a feedback type of the second reference signal to be received based on the first signal to be sent. For example, if the first signal sent by the first terminal device to the second terminal device is used to trigger the second terminal device to send a positioning measurement reference signal to the first terminal device, the first terminal device can determine the feedback type of the second reference signal and the positioning measurement corresponding to the reference signal.
  • a reference signal referred to as a second reference signal
  • the second signal may be sideline data information (referred to as second data), and the first terminal device may determine the feedback type of the second data to be received based on the first signal to be sent. For example, if the first signal is CSI-RS, the first terminal device may determine that the second data is channel state information, and further determine a feedback type corresponding to the channel state information.
  • second data sideline data information
  • the first terminal device may determine that the second data is channel state information, and further determine a feedback type corresponding to the channel state information.
  • the second signal may be second data
  • the first terminal device may determine the data amount of the second data to be received based on the first signal to be sent. For example, if the first signal is CSI-RS, the first terminal device may determine that the second data is channel state information, and further determine the amount of data corresponding to the channel state information.
  • the first terminal device may determine the second request information according to the feedback type of the second signal and/or the data volume of the data in the second signal. For details, please refer to the first terminal device according to the type of the first signal and/or the first The data amount of data in a signal determines the implementation manner of the first request information.
  • the embodiment of the present application may have the following implementation manners 1 and 2.
  • the resource request includes first request information and second request information, wherein the first request information includes the data amount of the first data, and the second request information includes the data amount of the second data.
  • the data volume of the first data and the data volume of the second data are used to indicate the resource volume of the first resource and the resource volume of the second resource requested by the first terminal device from the first apparatus.
  • both the data volume of the first data and the data volume of the second data may be carried in the data channel.
  • the first request information may also include the service type of the first data, and the service type of the first data may be used to indicate the priority of the first data, and the first apparatus may allocate resources for multiple terminal devices based on each The priority of data determines the resources allocated to each terminal device.
  • the first data is such as video data, voice data and web page data.
  • the service types of the first data are such as video, voice and web page, and the priorities of different service types from high to low are: video, voice and Web page.
  • the service type of the first data may be carried in the control channel.
  • the second request information may also include the feedback type of the second data, such as positioning measurement information, channel state information, voice data, and web page data, etc.
  • the feedback type of the second data is such as the positioning information type, channel state, etc. type, voice, and web page, etc.
  • the feedback type of the second data may also be used to indicate the priority of the second data.
  • the feedback type of the second data may be carried in the control channel.
  • the second request information may further include feedback time information, where the feedback time information is used to indicate time domain resources and periodic resources in the second resources.
  • the feedback time information may be the latest time when the first terminal device expects the second terminal device to feed back the second data, and the first apparatus may determine corresponding time domain resources and periodic resources according to the feedback time information.
  • the feedback time information may be carried in the control channel.
  • the resource request also includes link identification information
  • the link identification information includes identification information of the first terminal device (referred to as the first identification information) and identification information of the second terminal device (referred to as the second identification information), so as to The resource request is instructed to the first apparatus to request the resource for the purpose of exchanging signals between the first terminal device and the second terminal device.
  • both the first identification information and the second identification information may be carried in the control channel or in the data channel.
  • the first identification information can also be divided into identification information at the physical layer L1 and identification information at the data link layer L2 and the second identification information can be divided into identification information at the physical layer L1 and the identification information at the data link layer L2, the identification information of the first terminal device at the physical layer L1 and the identification information of the second terminal device at the physical layer L1 (collectively referred to as the third identification information) are jointly carried in the control channel,
  • the identification information of the first terminal device at the data link layer L2 and the identification information of the second terminal device at the data link layer L2 are jointly borne in the data channel.
  • the identification information of the terminal device has a total of 24 bits, 8 bits of which are carried in the physical layer L1, and 16 bits of which are carried in the data link layer L2.
  • the first device needs to parse part of the data from the physical layer L1 and parse the rest of the data from the data link layer L2 to obtain complete identification information.
  • FIG. 8 is a schematic diagram of the fields included in a resource request exemplarily provided by this application.
  • the first signal is the first data
  • the second signal is the second data
  • the resource request includes: Link identification information, first request information, and second request information.
  • the link identification information includes first identification information and second identification information
  • the first request information includes the data amount of the first data (which can be expressed as BSR_Tx)
  • the service type of the first data may be expressed as Type_Tx/Priority_Tx
  • the second request information includes the data volume of the second data (may be expressed as BSR_Rx)
  • the feedback type of the second data may be expressed as Type_Rx
  • feedback time information may be represented as TimeOffset_Rx).
  • the resource request includes link identification information, first request information, and second request information
  • the resource request includes the first identification information, the second identification information, and the first data.
  • each field in the resource request may be carried in a control channel or a data channel, that is, the first terminal device may divide each field in the resource request into multiple pieces of information/messages and send them to the first device, and different messages may be carried in different channels.
  • the first terminal device may send a data message including the data volume of the first data, the data volume of the second data and the fourth identification information to the first device through the data channel
  • the first terminal device may send a data message including the data volume of the first data, the data volume of the second data and the fourth identification information to the first device through the data channel.
  • the control channel sends a control message including the service type of the first data, the feedback type of the second data, the feedback time information and the third identification information to the first device.
  • this implementation manner may be applicable to a scenario where the first terminal device sends the first data to the second terminal device, and the second terminal device feeds back the second data to the first terminal device, that is, it is applicable to the first terminal device and the second terminal device.
  • service data is exchanged between second terminal devices.
  • a short-distance data communication is performed between vehicle A (ie, the first terminal device) and vehicle B (ie, the second terminal device), and vehicle A can communicate with the network device (ie, the second terminal device).
  • the first device) sends a resource request, the resource request includes first request information and second request information, wherein the first request information includes the data amount of data sent by vehicle A to vehicle B, and the second request information includes vehicle B to vehicle A
  • the amount of data to be sent, the resource request is used to instruct the network device to allocate resources for vehicle A to send data to vehicle B, and resources for vehicle B to send data to vehicle A.
  • the resource request may not include the first request information, or the included first request information may not include the first data.
  • the amount of data may be a data amount that the resource request only includes the second data, that is, the resource request may not include the first request information, or the included first request information may not include the first data.
  • the first terminal device sends the CSI-RS (ie the first reference signal) to the second terminal device, and the second terminal device sends the channel state information (ie the second data) to the first terminal device.
  • the resource request sent by the first terminal device to the first apparatus may include the second request information but not the first request information.
  • the second request information includes the data amount of the channel state information and the feedback type of the channel state information.
  • the data amount of the channel state information and the feedback type of the channel state information are not only used to instruct the first device to allocate resources for sending the channel state information to the second terminal device, but also can be implicitly instructed to the first device to the second terminal device
  • the channel state information is sent in response to the CSI-RS of the first terminal device, that is, the resource for sending the CSI-RS by the first terminal device can be requested from the first apparatus.
  • the first terminal device sends the CSI-RS (ie the first reference signal) to the second terminal device
  • the second terminal device sends the channel state information (ie the second data) to the first terminal device.
  • the resource request sent by the first terminal device to the first apparatus includes first request information and second request information, where the first request information may include the type of CSI-RS, and the second request information may include channel state information.
  • the amount of data The type of CSI-RS is used to instruct the first apparatus to allocate resources for sending the CSI-RS to the first terminal equipment, and the data amount of the channel state information is used to instruct the first apparatus to allocate the second terminal equipment to send the channel state resource of information.
  • the first terminal device sends first video data (ie, first data) to the second terminal device
  • the second terminal device sends second video data (ie, second data) to the first terminal device.
  • the resource request sent by the first terminal device to the first device may include the first request information but not the second request information.
  • the first request information includes the first video sent by the first terminal device to the second terminal device.
  • the data amount of the first video data can not only be used to instruct the first device to allocate resources for sending the first video data to the first terminal device, but also can be used to instruct the first device to allocate resources to the second terminal device for sending the first video data.
  • Two video data resources, here, the first terminal device and the first apparatus may both consider that the data volume of the first video data and the data volume of the second video data are the same.
  • the first terminal device determines to communicate with the second terminal device, the first terminal device requests a resource pool for communication between the two, and the first terminal device can send the resource request to the first device.
  • the first request information includes the first request information but does not include the second request information. Further, the first request information includes the data amount corresponding to the request for the resource pool or other indication information for requesting the resource pool.
  • the first device may predetermine n preset resources, and then generate preconfiguration information according to the n preset resources, where the preconfiguration information is used to indicate the n preset resources, and n is a positive integer.
  • the pre-configuration information includes a plurality of index information, and each index information corresponds to a preset resource, that is, each index information indicates a preset resource.
  • Table 1 shows a kind of pre-configuration information exemplarily provided in this application, for example, index information 1 indicates resource 1, and index information 2 indicates resource 2.
  • the plurality of preset resources may be implicitly indicated based on locations in the pre-configuration information, for example, the resource located at the first location is resource 1, the resource located at the second location is resource 2, and so on.
  • index information resource Index information 1 Resource 1 Index information 2 Resource 2 Index information 3 Resource 3 ... ... index information n resource n
  • the first device may send the generated pre-configuration information to the first terminal device in advance.
  • the first device is a network device, and the network device may send the pre-configuration information to the first terminal device through high-level signaling (such as RRC, MAC CE). in a terminal device.
  • the first apparatus is a group head terminal device, and the group head terminal device may send the pre-configuration information to the first terminal device through PC5-RRC.
  • the first terminal device may determine index information (referred to as first index information) corresponding to the first resource requested by the first terminal device according to the first signal to be sent, and then The index information is included in the first request information, and is used to request a resource corresponding to the first index information from the first device.
  • first index information index information corresponding to the first resource requested by the first terminal device according to the first signal to be sent.
  • a type (or referred to as a resource type (resource type)) may also be added to the pre-configuration information.
  • the pre-configuration information includes m types, where m is a positive integer. Each type corresponds to at least one index information, and each index information indicates a preset resource. As shown in Table 2, another kind of pre-configuration information is exemplarily provided in this application. For example, type 1 includes index information 1 to index information 3, and index information 1 to index information 3 respectively indicate resource 1 to resource 3.
  • the multiple preset resources may also be indicated implicitly based on the location in the pre-configuration information, for example, the resources located in the first to third locations belong to type 1, and respectively indicate resource 1 to Resource 3.
  • the type of the first signal (referred to as the first type) may be one of multiple types in the pre-configured information.
  • the first terminal device may determine at least one corresponding to the first type according to the first type. index information, and then determine the index information (referred to as first index information) corresponding to the first resource from at least one index information.
  • the first terminal device includes the first type and the first index information in the first request information, so as to request the first device for a resource (ie, a first resource) corresponding to the first type and the first index information in common.
  • the first terminal device determines that the first resource used for sending the first signal is resource 2, then according to the pre-configuration information shown in Table 2, the first terminal device will include the first resource of type 1 and index information 2. A request message is sent to the first device.
  • the first signal is a first reference signal
  • the type of the first reference signal ie, the first type
  • the purpose of the first reference signal An example is as follows:
  • the first reference signal is CSI-RS, and the first type is channel state type A, indicating that the first reference signal is used by the first terminal device to request channel state information from the second terminal device.
  • the first reference signal is a positioning measurement reference signal
  • the first type is positioning information type B, which indicates that the first reference signal is used by the first terminal device to request positioning measurement information from the second terminal device.
  • the first reference signal is an auxiliary resource selection request
  • the first type is auxiliary information type C, indicating that the first reference signal is used by the first terminal device to request auxiliary resource selection information
  • the auxiliary resource selection information is the second Obtained by the terminal equipment assisting the first terminal equipment in selecting sideline resources in the resource pool.
  • the first reference signal is a power control assistance request
  • the first type is power control type D, indicating that the first reference signal is a power control assistance such as signal power and interference power used by the first terminal device to request the second terminal device informational.
  • the first signal is first data
  • the type of the first data may be a service type, for example: (5)
  • the first data is video data, and the type of the first data is video.
  • the first data is picture data, and the type of the first data is a picture.
  • the first data is web page data, and the type of the first data is web page.
  • the second request information may also include second index information, or include the feedback type and second index information of the second signal, and the second index information, or the feedback type of the second signal and the second index information are used for for instructing the first device to allocate a second resource for sending the second signal to the second terminal device.
  • the feedback type of the second signal may be associated with the first type.
  • the first type is channel state type A
  • the feedback type of the second data is channel state type a.
  • the first type is the positioning information type B
  • the feedback type of the second data is the positioning information type b.
  • the first type is auxiliary information type C
  • the feedback type of the second data is auxiliary information type c.
  • the first type is power control type D
  • the feedback type of the second data is power control type d.
  • the feedback type of the second signal may be the same as the first type, which means that the feedback types of the first type and the second data are both channels.
  • the state (3I) type is either of the positioning information type, or of the assistant information type, or of the power control type.
  • the feedback type of the second signal may not be associated with the first type.
  • the type of the first data is a picture
  • the type of feedback of the second data is a web page.
  • the type of the first data is video
  • the type of the second data is channel state information.
  • the first terminal device may carry the first index information, or the first type and the first index information in the control channel.
  • the first terminal device may also carry the second index information, or the feedback type of the second signal and the second index information in the control channel.
  • the second request information includes feedback information of the second signal, where the feedback information of the second signal includes a feedback type of the second signal and a feedback element corresponding to the feedback type.
  • the feedback type of the second signal may or may not be related to the first type, for details, please refer to the above description.
  • the feedback elements corresponding to different feedback types are different.
  • the feedback elements corresponding to the channel state types are one or more of CQI, RI, and PMI.
  • the feedback element corresponding to the positioning information type is one or more of RTT, AoA, and AoD.
  • the feedback elements corresponding to the auxiliary information types are, for example, one or more of resource identifiers, RSRP, and SINR.
  • Feedback elements corresponding to the power control type are signal power and/or interference power.
  • the second signal may specifically be second data
  • the feedback type of the second data in the second request information and the feedback element corresponding to the feedback type may indicate the data amount of the second data.
  • the second data is channel state information.
  • the feedback type of the second data is a channel state type
  • feedback elements corresponding to the feedback type are one or more of CQI, RI, and PMI.
  • the second request information includes the channel state type and the feedback element CQI corresponding to the channel state type. If it is agreed that the feedback from the second terminal equipment to the first terminal equipment is full band, the first device can determine the data of the second data. The amount is about 5 bits. If it is agreed that the second terminal equipment feeds back k subbands to the first terminal equipment, and k is a positive integer, the first apparatus can determine that the data amount of the second data is about 5 ⁇ kbit.
  • the first device can determine the data amount of the second data according to the feedback type of the second data and the feedback element corresponding to the feedback type, so as to allocate resources to the second terminal device, which helps to improve the accuracy of resource allocation, Also, the complexity of pre-configuration of the first device is reduced.
  • the second request information may further include feedback time information, and/or the resource request may further include link identification information.
  • the resource request may further include link identification information.
  • FIG. 9 a schematic diagram of fields included in another resource request exemplarily provided by this application, exemplarily, the first signal is the first reference signal, the second signal is the second data, and the resource request contains It includes link identification information, first request information, and second request information.
  • the link identification information includes first identification information and second identification information
  • the first request information includes a first type (which can be expressed as Resource Type) and the first index information
  • the second request information includes the feedback type of the second data, the feedback element corresponding to the feedback type, and the feedback time information (which can be expressed as TimeOffset_Rx), where the feedback type of the second data and the feedback element corresponding to the feedback type are It is used to indicate the data quantity (Resource Quantity) of the second data.
  • the resource request includes link identification information, first request information and second request information
  • the resource request includes first identification information, second identification information, first type, One or more of the first index information, the feedback type of the second data, the feedback element corresponding to the feedback type, and the feedback time information.
  • the feedback type of the second signal when the feedback type of the second signal is associated with the first type, for example, the feedback types of the first type and the second data are both channel state types, or both are positioning information types, or both.
  • the feedback type of the second signal in the second request information can be multiplexed with the first type in the first request information, that is, the resource request includes the first identification information, One or more of the second identification information, the first type, the first index information, the feedback element corresponding to the feedback type (ie the first type), and the feedback time information, the first type is not only used to indicate the type of the first signal, Also used to indicate the feedback type of the second data. Based on this, signaling overhead can be reduced on the premise of effectively conveying indication information.
  • each field in the resource request can be carried in a control channel or a data channel, that is, the first terminal device can send each field in the resource request into multiple pieces of information/messages to the first device, and different messages can be carried in the first device. in different channels.
  • the first terminal device may send a data message including the fourth identification information to the first device through a data channel
  • the first terminal device may send a data message including the first type, the first type and the first device through a control channel to the first device.
  • this implementation manner may be applicable to a scenario in which a first terminal device sends a first reference signal to a second terminal device, and the second terminal device feeds back second data to the first terminal device.
  • short-distance data communication is performed between the tablet (ie, the first terminal device) and the TV (ie, the second terminal device).
  • the tablet Before the tablet transmits video data to the TV, the tablet needs to obtain the information between the tablet and the TV. Specifically, the tablet sends a resource request to the mobile phone (that is, the first device), and the resource request includes the first request information and the second request information, wherein the first request information includes the type of CSI-RS (that is, the type of CSI-RS).
  • the second request information includes the channel state type and the feedback element CQI corresponding to the channel state type, and the resource request is used to instruct the mobile phone to allocate the CSI-RS for the tablet to send to the TV. resources, and resources for the TV to send channel state information to the tablet.
  • this implementation manner may also be applicable to a scenario in which the first terminal device sends the first data to the second terminal device, and the second terminal device feeds back the second data to the first terminal device.
  • a short-distance data communication is performed between vehicle A (ie, the first terminal device) and vehicle B (ie, the second terminal device), and vehicle A can communicate with the network device (ie, the second terminal device).
  • the first device) sends a resource request, the resource request includes first request information and second request information, wherein the first request information includes the service type of data sent by vehicle A to vehicle B and the first index information corresponding to the service type,
  • the second request information includes a channel state type and a feedback element CQI corresponding to the channel state type, and the resource request is used to instruct the network device to allocate resources for vehicle A to send data to vehicle B, and for vehicle B to send channel state to vehicle A resource of information.
  • the resource request may include only the first request information but not the second request information, or there may be a situation where the resource request only includes the second request information but not the first request information.
  • the first apparatus and the first terminal device may predetermine the corresponding relationship, so as to infer unknown information in the resource request according to the known information in the resource request.
  • the first apparatus and the first terminal device pre-determine the correspondence between the first type, the feedback type of the second data, and the feedback elements, for example, the feedback types of the first type and the second data are both channel states.
  • Type the feedback element corresponding to the channel state type is CQI
  • the resource request may only include the first request information but not the second request information, where the first type included in the first request information is the channel state type, and the first request information It may be that the feedback type and feedback element of the second data are indicated as channel state type and CQI, respectively.
  • Step 702 The first device sends a resource response to the first terminal device, wherein the resource response includes first indication information and second indication information, the first indication information is used to indicate the first allocated resources, and the second indication information is used to indicate the first indication information. 2. Allocate resources.
  • the first device needs to allocate resources to the first terminal device and the second terminal device respectively according to the current resource allocation situation.
  • the first resource and the second resource requested by the terminal device are different.
  • the resource allocated by the first apparatus for the first terminal device for sending the first signal can be referred to as the first resource as follows.
  • the resources allocated by the first apparatus to the second terminal equipment for sending the second signal are referred to as second allocated resources.
  • the first resource and the first allocated resource may be the same or different, and the second resource and the second allocated resource may be the same or different.
  • the first device determines the implementation manner of the first allocated resource and the second allocated resource, which is described as follows:
  • the first device determines that the resource request includes link identification information, that is, the first device determines that the resource request includes the first identification information and the second identification information, it can determine that the resource request sent by the first terminal device is for If the first resource is requested for the first terminal device and the second resource is requested for the second terminal device, correspondingly, the first device determines the first allocated resource and the second resource according to the first request information and the second request information in the resource request, respectively. resource allocation.
  • the resource request further includes one or more of the data volume of the first data, the service type of the first data, the data volume of the second data, the feedback type of the second data, and the feedback time information.
  • the first device determines the amount of resources required by the first terminal device to send the first data according to the data volume of the first data, and determines the amount of resources required by the second terminal device to send the second data according to the data volume of the second data, Then, according to the amount of resources required by the first data and the amount of resources required by the second data, combined with the service type of the first data, the feedback type of the second data, the feedback time information, as well as the current resource allocation and channel quality, and other factors, A first allocated resource and a second allocated resource are determined.
  • the first device determines the first resource, if it is determined that the current resource is relatively tight, then, according to the service type of the first data, determine whether to allocate the resource to the first terminal device, or determine whether to allocate the resource to the first terminal device. quantity. For example, if the first device receives resource requests from multiple terminal devices, such as receiving resource request 1 from terminal device 1 and resource request 2 from terminal device 2, the first device in resource request 1 is the first The service type of the data is video, and the service type of the first data in resource request 2 is web page. If the first device determines that the current resources are tight, it can first allocate resources to terminal equipment 1, and then allocate resources to terminal equipment 2.
  • the first apparatus may determine time domain resources and periodic resources in the second allocated resources according to the feedback time information.
  • the second request information includes feedback time information (TimeOffset_Rx), and the first device may use TimeOffset_Rx as the feedback time of the second signal, or select the earliest time within TimeOffset_Rx that meets the timing requirements; if CSI-RS measurement or assistance
  • the information is configured/triggered periodically, and the first apparatus may further indicate the periodic resources of the second allocated resources according to the information.
  • the resource request further includes one or more of the first type, the first index information, the feedback type of the second data, the feedback element corresponding to the feedback type, and the feedback time information.
  • the first apparatus determines, according to the first index information in the resource request, or the first index information and the first type, the first resource requested by the first terminal device, and the feedback type and The feedback element corresponding to the feedback type determines the resource amount of the second resource requested by the first terminal device, and then combines the feedback of the first type and the second data according to the resource amount of the first resource and the second resource requested by the first terminal device Type, feedback time information, and factors such as current resource allocation and channel quality, determine the first allocated resource and the second allocated resource.
  • the first apparatus determines the first resource requested by the first terminal device from the preconfigured information according to the first index information in the resource request.
  • the resource request includes index information 2
  • the first apparatus can determine from the pre-configured information that the first resource requested by the first terminal device is resource 2, and after determining that resource 2 has not been allocated to other terminals, it will The resource 2 is allocated to the first terminal device, that is, the resource 2 is used as the first allocated resource.
  • the first apparatus determines the first resource requested by the first terminal device from the preconfigured information according to the first index information and the first type in the resource request. For example, in Table 2, the resource request includes type 1 and index information 2, then the first apparatus can determine from the pre-configuration information that the first resource requested by the first terminal device is resource 2, and after determining that resource 2 has not been allocated to other terminals After the device, the resource 2 is allocated to the first terminal device, that is, the resource 2 is taken as the first allocated resource.
  • the first apparatus may, according to the first type and the first signal in the resource request sent by the third terminal equipment, conflict with type, or determine how to allocate resources for the first terminal device and the third terminal device according to the terminal priority of the first terminal device and the terminal priority of the third terminal device.
  • the first device can select a resource similar to the first resource requested by the first terminal device as the first allocation resource allocation. to the first terminal device. Or the first device feeds back a response that the request fails to the first terminal device, so that the first terminal device determines the new first index information, or the first type and the first index information, and sends a new resource request to the first device.
  • the first device can predict the data volume of the second data according to the feedback type of the second data and the feedback element corresponding to the feedback type, and then determine the amount of data required by the second data according to the data volume of the second data. resource amount, and then determine the second allocated resource according to the resource amount required by the second data.
  • the first device determines the second allocation resource according to the amount of resources required by the second data. For details, refer to the description in the first implementation manner.
  • the first apparatus After determining the first allocated resource and the second allocated resource, the first apparatus generates a resource response according to the first allocated resource and the second allocated resource.
  • the resource response includes first indication information and second indication information, wherein the first indication information is used to indicate the first allocated resource, and the second indication information is used to indicate the second allocated resource.
  • the first terminal device acquires the first indication information and the second indication information from the resource response.
  • the first apparatus may carry both the first indication information and the second indication information in the control channel sent to the first terminal device.
  • the first apparatus may send the first indication information and the second indication information to the first terminal device as one message, or send them to the first terminal device as two messages respectively.
  • the resource response may also include link identification information (including first identification information and second identification information) obtained from the resource request, where the link identification information is used to indicate that the two resources indicated by the resource response are used for The first allocated resource for the first terminal device to transmit the first signal and the second allocated resource for the second terminal device to transmit the second signal.
  • link identification information including first identification information and second identification information
  • the first terminal device acquires the link identification information from the resource response, and determines that the first indication information and the second indication information in the resource response are used to indicate the first allocated resources and the second allocated resources, respectively.
  • the resource response can be received by other terminal devices.
  • other terminal devices can use the first indication information and the second indication information in the resource response according to the first indication information and the second indication information in the resource response.
  • the first allocation resource and the second allocation resource are avoided, so that other terminal devices will not compete for resources with the first terminal device and/or the second terminal device, and the transmission accuracy rate in the entire interaction process is guaranteed.
  • the present application may also have the following implementation manners.
  • the first device directly sends the second indication information to the second terminal device, so that the first terminal device does not need to send the second terminal device obtained from the resource response to the second terminal device.
  • Implementation mode 2 The first apparatus sends a resource response (including the first indication information and the second indication information) to the first terminal device and the second terminal device respectively, so that the first terminal device does not need to send a slave resource response to the second terminal device.
  • the first indication information and/or the second indication information obtained in .
  • the first device in scenario 1 is a group head terminal device, and in scenario 2 the first device is a network device.
  • the first terminal equipment, the second terminal equipment and the group head terminal equipment may form a terminal equipment group or not form a terminal equipment group. Before the first terminal equipment and the second terminal equipment exchange signals, the first terminal equipment may report to the group head. The terminal device requests the first resource and the second resource. The details are as follows in steps 701-a and 702-a.
  • the first terminal device sends a resource request to the group head terminal device.
  • the first terminal device communicates with the group head terminal device through a side link.
  • the resource request includes the data volume of the first data, the service type of the first data, the data volume of the second data, the feedback type of the second data, the feedback time information, and the link identification information.
  • the data volume of the first data, the data volume of the second data, and the fourth identification information may be carried in the PSSCH sent by the first terminal device to the group head terminal device.
  • the service type of the first data, the feedback type of the second data, the feedback time information, and the third identification information may be carried in the PSCCH sent by the first terminal device to the group head terminal device, and may specifically be a newly defined secondary SCI2 middle.
  • the format of the newly defined secondary SCI2 can be indicated by the primary SCI1.
  • the format indication information (2nd-stage SCI format) in the primary SCI1 is used to indicate the new format of the secondary SCI2.
  • the new format is, for example, called is format 1.
  • the group head terminal device determines that the received second-level SCI2 indicated by the first-level SCI1 is format 1, the group head terminal device can parse the received second-level SCI2 according to format 1.
  • the format of the newly defined second-level SCI2 is indicated by the format indication information in the original first-level SCI1, and the newly defined second-level SCI2 can inherit the content in the original first-level SCI1.
  • the data volume of the first data, the data volume of the second data, and the fourth identification information may also be carried in the PSCCH sent by the first terminal device to the group head terminal device.
  • the service type of the first data, the feedback type of the second data, the feedback time information and the third identification information are carried in the PSSCH sent by the first terminal device to the group head terminal device.
  • the resource request includes the first index information, the first type, the feedback type of the second data, the feedback element corresponding to the feedback type, the feedback time information, and the link identification information.
  • the first index information, the first type, the feedback type of the second data, the feedback element corresponding to the feedback type, the feedback time information, and the link identification information may be carried in the Specifically, the PSCCH sent by the group head terminal equipment may be a newly defined portable SCI.
  • the portable SCI also includes format indication information, and the format indication information can be used to indicate that the format of the SCI is a new format, such as format 2.
  • the group head terminal device receives the SCI, it parses the SCI to obtain the format indication information in the SCI as format 2, and the group head terminal device parses the SCI according to format 2.
  • the signaling load of the interaction between the first terminal and the group head terminal device can be reduced in the resource request.
  • the fourth identification information may be carried in the PSSCH sent by the first terminal device to the group head terminal device.
  • the first index information, the first type, the feedback type of the second data, the feedback element corresponding to the feedback type, the feedback time information, and the third identification information may be carried in the PSCCH sent by the first terminal device to the group head terminal device, and may specifically be is a newly defined secondary SCI2.
  • the format of the newly defined second-level SCI2 may be indicated by the first-level SCI1.
  • the format indication information in the first-level SCI1 is used to indicate a new format of the second-level SCI2, for example, the new format is called format 3.
  • the group head terminal device determines that the received second-level SCI2 indicated by the first-level SCI1 is format 3, the group head terminal device can parse the received second-level SCI2 according to format 3.
  • the format of the newly defined second-level SCI2 is indicated by the format indication information in the original first-level SCI1, and the newly defined second-level SCI2 can inherit the content in the original first-level SCI1.
  • the fourth identification information may also be carried in the PSCCH sent by the first terminal device to the group head terminal device.
  • the first index information, the first type, the feedback type of the second data, the feedback element, the feedback time information and the third identification information are carried in the PSSCH sent by the first terminal device to the group head terminal device.
  • first index information, the first type, the feedback type of the second data, the feedback element, the feedback time information and the third identification information are carried in the PSSCH sent by the first terminal device to the group head terminal device, and the other part is The field is carried in the PSCCH sent by the first terminal device to the group head terminal device.
  • the group head terminal device sends a resource response to the first terminal device.
  • the group head terminal device determines the first allocated resource and the second allocated resource according to the resource request, and then generates a resource response according to the first allocated resource and the second allocated resource.
  • the resource response includes the first indication information, the second indication information, and the link identification information.
  • the fourth identification information may be carried in the PSSCH sent by the group head terminal device to the first terminal device.
  • the first indication information, the second indication information and the third identification information may be carried in the PSCCH sent by the group head terminal device to the first terminal device, and may specifically be in a newly defined secondary SCI2.
  • the format of the newly defined second-level SCI2 may be indicated by the first-level SCI1.
  • the format indication information in the first-level SCI1 is used to indicate a new format of the second-level SCI2, for example, the new format is called format 4.
  • the first terminal device may parse the received secondary SCI2 according to format 4.
  • the fourth identification information may also be carried in the PSCCH sent by the group head terminal device to the first terminal device.
  • the first indication information, the second indication information and the third identification information are carried in the PSSCH sent by the group head terminal device to the first terminal device.
  • part of the fields in the first indication information, the second indication information and the third identification information are carried in the PSSCH sent by the group head terminal equipment to the first terminal equipment, and another part of the fields are carried in the group head terminal equipment and sent to the first terminal equipment. in the PSCCH.
  • the first terminal device and the second terminal device are in the serving cell of the network device, and before the first terminal device and the second terminal device exchange signals, the first terminal device may request the network device for the first resource and the second resource.
  • the details are as follows in steps 701-b and 702-b.
  • Step 701-b the first terminal device sends a resource request to the network device.
  • the resource request includes the data amount of the first data, the service type of the first data, the data amount of the second data, the feedback type of the second data, the feedback time information, and the link identification information.
  • the data volume of the first data, the data volume of the second data and the fourth identification information can be carried in the physical uplink shared channel (physical uplink shared channel, PUSCH) sent by the first terminal device to the network device.
  • the service type of the first data, the feedback type of the second data, the feedback time information, and the third identification information can be carried in the physical uplink control channel (physical uplink control channel, PUCCH) sent by the first terminal device to the network device.
  • PUCCH physical uplink control channel
  • it can be It is a newly defined uplink control information (uplink control information, UCI).
  • the format indication information in the UCI may be used to indicate whether the UCI adopts a new format, for example, the new format is called format 5.
  • the network device receives the UCI, it parses the format indication information in the UCI, and determines that the current UCI adopts format 5, and the network device can parse the current UCI according to format 5.
  • the data volume of the first data, the data volume of the second data, and the fourth identification information may also be carried in the PUCCH sent by the first terminal device to the network device.
  • some fields in the data volume of the first data, the data volume of the second data, and the fourth identification information are carried in the PUSCH sent by the first terminal device to the network device, and another part of the fields are carried in the PUSCH sent by the first terminal device to the network device. in the PUCCH.
  • the service type of the first data, the feedback type of the second data, the feedback time information and the third identification information are carried in the PUSCH sent by the first terminal device to the network device.
  • some fields of the service type of the first data, the feedback type of the second data, the feedback time information, and the third identification information are carried in the PUSCH sent by the first terminal device to the network device, and another part of the fields are carried in the first terminal device.
  • the PUCCH sent to the network device In the PUCCH sent to the network device.
  • the resource request includes the first index information, the first type, the feedback type of the second data, the feedback element corresponding to the feedback type, the feedback time information, and the link identification information.
  • the first index information, the first type, the feedback type of the second data, the feedback element corresponding to the feedback type, the feedback time information, and the link identification information may be carried in the Specifically, the PUCCH sent by the network device may be a newly defined portable UCI.
  • the portable UCI also includes format indication information, and the format indication information can be used to indicate that the format of the UCI is a new format, for example, the new format is called format 6.
  • the network device parses the UCI to obtain the format indication information in the UCI as format 6, and the network device can parse the UCI according to format 6.
  • the signaling load of the interaction between the first terminal and the network device can be reduced in the resource request.
  • the fourth identification information may be carried in the PUSCH sent by the first terminal device to the network device.
  • the first index information, the first type, the feedback type of the second data, the feedback element corresponding to the feedback type, the feedback time information, and the third identification information may be carried in the PUCCH sent by the first terminal device to the network device, and may specifically be a in the newly defined UCI.
  • the newly defined UCI may be the addition of the first index information, the first type, the feedback type of the second data, the feedback element corresponding to the feedback type, the feedback time information and the third identification information in the existing UCI, and the format in the UCI indicates
  • the information is used to indicate whether the UCI adopts a new format, for example, the new format is called format 7.
  • the network device receives the UCI, it parses the format indication information to determine that the current UCI adopts format 7, and the network device can parse the current UCI according to format 7.
  • the fourth identification information may also be carried in the PUCCH sent by the first terminal device to the network device.
  • the first index information, the first type, the feedback type of the second data, the feedback element corresponding to the feedback type, the feedback time information and the third identification information are carried in the PUSCH sent by the first terminal device to the network device.
  • the first index information, the first type, the feedback type of the second data, the feedback element corresponding to the feedback type, the feedback time information, and the third identification information are carried in the PUSCH sent by the first terminal device to the network device.
  • Another part of the field is carried in the PUCCH sent by the first terminal device to the network device.
  • Step 702-b the network device sends a resource response to the first terminal device.
  • the network device determines the first allocated resource and the second allocated resource according to the resource request, and then generates a resource response according to the first allocated resource and the second allocated resource.
  • the resource response includes the first indication information, the second indication information, and the link identification information.
  • the fourth identification information may be carried in a downlink shared physical channel (physical downlink shared channel, PDSCH) sent by the network device to the first terminal device.
  • the first indication information, the second indication information and the third identification information may be carried in a physical downlink control channel (PDCCH) sent by the network device to the first terminal device, and may be specifically in a newly defined DCI .
  • PDCH physical downlink control channel
  • the format indication information in the DCI may be used to indicate whether the DCI adopts a new format, such as format 8.
  • the first terminal device receives the DCI, it parses the format indication information in the DCI to determine that the current DCI adopts format 8, and then the first terminal device can parse the current DCI according to format 8.
  • the fourth identification information may also be carried in the PDCCH sent by the network device to the first terminal device.
  • the first indication information, the second indication information and the third identification information are carried in the PDSCH sent by the network device to the first terminal device.
  • some fields of the first indication information, the second indication information and the third identification information are carried in the PDSCH sent by the network device to the first terminal device, and another part of the fields are carried in the PDCCH sent by the network device to the first terminal device.
  • step 701 and 702 including step 701-a, step 702-a and step 701-b, step 702-b
  • the resource allocation method of this embodiment of the present application has been described in detail, so that the first terminal device can Obtain the first indication information and/or the second indication information in the response, and then send the first signal to the second terminal device according to the first indication information, and receive the second signal from the second terminal device according to the second indication information.
  • steps 703 to 705 shown in FIG. 7 will specifically describe the specific implementation manner of the first terminal device performing signal interaction with the second terminal device after the first terminal device obtains the resource response. Continuing to refer to steps 703 to 705 shown in FIG. 7 .
  • Step 703 The first terminal device sends control information to the second terminal device, where the control information includes the first indication information and/or the second indication information.
  • the first terminal device generates control information according to the resource response, and sends the control information to the second terminal device.
  • the control information may include second indication information, where the control information is used to instruct the second terminal device to send the second signal to the first terminal device on the second allocated resource.
  • the control information may further include first indication information, where the control information is further used to instruct the second terminal device to receive the second signal from the first terminal device on the first allocated resource.
  • the first terminal device may carry both the first indication information and the second indication information in the control channel sent to the second terminal device.
  • the first terminal device may send the first indication information and the second indication information to the second terminal device as one message, or send them to the second terminal device as two messages respectively.
  • control information may further include a preset feedback type, where the preset feedback type is used to instruct the second terminal device to send a second signal corresponding to the preset feedback type to the first terminal device.
  • control information may further include a preset feedback type, such as a channel state type, correspondingly, the second terminal device may measure the CSI-RS (ie, the first signal) to obtain Channel state information (ie the second signal).
  • control information may also include preset feedback elements corresponding to the preset feedback types, such as the preset feedback elements corresponding to the preset feedback types, such as the CQI corresponding to the channel state type, and the second terminal device may measure the CSI-RS (that is, the first a signal) to obtain the CQI (ie, the second signal).
  • preset feedback elements corresponding to the preset feedback types such as the preset feedback elements corresponding to the preset feedback types, such as the CQI corresponding to the channel state type
  • the second terminal device may measure the CSI-RS (that is, the first a signal) to obtain the CQI (ie, the second signal).
  • Step 704 The first terminal device sends a first signal to the second terminal device on the first allocated resource indicated by the first indication information.
  • the first terminal device determines the first allocated resource according to the first indication information, and then sends the first signal to the second terminal device on the first allocated resource.
  • the second terminal device determines the first allocated resource according to the first indication information, and then receives the first signal from the first terminal device on the first allocated resource.
  • Step 705 The second terminal device sends a second signal to the first terminal device on the second allocated resource indicated by the second indication information.
  • the second terminal device determines the second allocated resource according to the second indication information, and then sends the second signal to the first terminal device on the second allocated resource.
  • the first terminal device determines the second allocated resource according to the second indication information, and then receives the second signal from the second terminal device on the second allocated resource.
  • the first terminal device may determine the second allocated resource according to the second indication information, that is, determine the resource for the second terminal device to send the second signal, the first terminal device does not need to blindly detect the second signal, and directly It is only necessary to receive the second signal from the second terminal device on the allocated resources, which helps to save the power consumption of the first terminal device.
  • the second terminal device may determine the second signal to be sent to the first terminal device according to the first signal, that is, the second signal is associated with the first signal.
  • the second terminal device may send a second signal corresponding to the preset feedback type to the first terminal device according to the preset feedback type in the control information.
  • the first indication information may indicate M resources, and the first terminal device may send the first signal M times to the second terminal device based on the first indication information, where M is positive integer.
  • the second indication information may indicate N resources, and the second terminal device may send the second signal N times to the first terminal device based on the second indication information, where N is a positive integer, and M may be equal to or not equal to N.
  • FIG. 10 is a schematic flowchart of a signal interaction between a first terminal device and a second terminal device provided by the present application.
  • Step 1001 the first terminal device sends the first control information and the second control information to the second terminal device.
  • the first control information may include at least one of a first field or a second field, at least one of the first field or the second field indicates the format of the first control information, the first field or the second field At least one indicates the format of the second control information.
  • the first control information may include both a first field and a second field, and the format of the first control information and the format of the second control information are jointly indicated by the first field and the second field, for example, indicated by the first field.
  • the format of the first control information the format of the second control information is indicated by the second field; or, the format of the second control information is indicated by the first field, and the format of the first control information is indicated by the second field.
  • the first control information may only include the first field, or, the first control information may only include the second field, and the first field (or the second field) alone indicates the format of the first control information and the second control information.
  • the format of the information may only include the first field, or, the first control information may only include the second field, and the first field (or the second field) alone indicates the format of the first control information and the second control information. The format of the information.
  • the format of the first control information includes at least a first format a and a second format a, wherein the first format a indicates the time-frequency resource (equivalent to the second allocated resource) for the second terminal device to feed back the second signal, and the second The format a instructs the first terminal device to send the transmission information of the data channel.
  • the first control information may be SCI.
  • the format of SCI includes first-level SCI1 and second-level SCI2, among which, SCI1 includes SCI1-A, SCI2 includes SCI2-A and SCI2-B, and the fields contained in SCI1-A and the definition of each field can be found in Table 3.
  • the fields included in SCI2-A and the definitions of each field can be found in Table 4.
  • the second format a can be an existing first-level SCI1, for example, it can be SCI1-A in the above standard protocol; the first format a can be a new first-level SCI1, in order to be compatible with SCI1-A in the standard protocol.
  • the new first-level SCI1 is defined as SCI1-B, wherein, SCI1-B can multiplex at least one field in SCI1-A, and the information indicated by each multiplexed field is redefine.
  • the second signal may include: channel state information, auxiliary resource selection information, positioning measurement information, power control auxiliary information, and other information carried in the PSSCH.
  • the data channel may be PSSCH; the transmission information may include information related to the transmission of the data channel, such as: demodulation reference signal (Demodulation Reference Signal, DMRS), modulation and coding scheme (Modulation Coding Scheme, MCS), antenna port information, time-frequency resources, frequency domain resources and other information.
  • demodulation reference signal Demodulation Reference Signal
  • MCS Modulation Coding Scheme
  • the format of the second control information includes at least a third format and a fourth format, wherein the third format indicates the redundancy version (Redundancy Version, RV) of the second signal fed back by the second terminal device; the fourth format indicates the first terminal equipment Devices transmit redundant versions of data channels (also called data messages).
  • the second control information may be SCI; exemplarily, the fourth format may be the existing second-level SCI2, for example, may be SCI2-A or SCI2-B in the standard protocol second-level SCI2.
  • the fourth format is exemplified as SCI2-A in the standard protocol in the embodiments of this application;
  • the third format may be a new second-level SCI2, in order to be compatible with SCI2-A and SCI2-B in the standard protocol difference, in this embodiment of the present application, the new secondary SCI2 is defined as SCI2-C; wherein, SCI2-C can multiplex at least one field in SCI2-A, and perform information on the information indicated by each multiplexed field. redefine.
  • SCI2-C multiplexes the Redundancy version field in SCI2-A, and the Redundancy version field in SCI2-C indicates that the second terminal device feeds back the redundancy version of the second signal; this will not increase PSCCH signaling overhead. , to ensure the system transmission performance.
  • the format of the first control information can be indicated by different values of the first field
  • the second control information can be indicated by different values of the second field format
  • the format of the first control information may be represented by 1 bit (bit) or 2 bits in the first field.
  • bit when the value of the 1 bit is 0, it indicates that the format of the first control information is the first format a, and the When the 1-bit value is 1, it indicates that the format of the first control information is the second format a; or, when the 1-bit value is 1, it indicates that the format of the first control information is the first format a, and when the 1-bit value is 0, it indicates the first format a.
  • the format of a control information is the second format a; or, when the 2-bit value is 00, it indicates that the first control information is the second format a, and when the 2-bit value is 11 (or 10 or 01), it indicates that the first control information is The first format a.
  • the format of the second control information can be represented by 1 bit or 2 bits in the second field.
  • the value of the 1 bit is 0, it indicates that the format of the second control information is the third format, and the value of the 1 bit is 1.
  • the 1-bit value is 1, it indicates that the format of the second control information is the fourth format; or, when the 1-bit value is 1, it indicates that the format of the second control information is the third format, and when the 1-bit value is 0, it indicates that the format of the second control information is the first format.
  • the first field may be the field Reserved (reserved bits) in SCI1-A and SCI1-B, and 1 bit or 2 bits in the field Reserved are used to indicate the format of the first control information, for example, the 2 bits
  • the value is 00
  • it indicates that the first control information is SCI1-A
  • the 2-bit value indicates that the first control information is SCI1-B
  • the 1-bit value indicates that the first control information is SCI1-A
  • the 1-bit value is 1 indicates that the first control information is SCI1-B
  • the 1-bit value is 1 indicates that the first control information is SCI1-A
  • the 1-bit value is 0, it indicates that the first control information is SCI1 -B.
  • the second field can be the field 2nd-stage SCI format (two-level SCI2 format) in SCI1-A and SCI1-B, and use 1 bit or 2 bits in the field 2nd-stage SCI format to indicate the format of the second control information, For example, when the 2-bit value is 00, it indicates that the second control information is SCI2-A, and when the 2-bit value is 11, it indicates that the second control information is SCI2-C; or, when the 1-bit value is 0, it indicates the second control information is SCI2-A, and when the 1-bit value is 1, it indicates that the second control information is SCI2-C.
  • the 2-bit value when the 2-bit value is 00, it indicates that the second control information is SCI2-A, and when the 2-bit value is 11, it indicates that the second control information is SCI2-C; or, when the 1-bit value is 0, it indicates the second control information is SCI2-A, and when the 1-bit value is 1, it indicates that the second control information is SCI2-C.
  • 1 bit or 2 bits in Reserved indicate the format of the first control information
  • 1 in the 2nd-stage SCI format The bit or 2 bits indicate the format of the second control information.
  • Mode 2 When the first control information only includes the first field (or the second field), the format of the first control information and the format of the second control information may be indicated by different values of the first field (or the second field). .
  • 2 bits in the first field represent the format of the first control information and the format of the second control information
  • the 2-bit value when the 2-bit value is 00, it indicates that the format of the first control information is the first format a
  • the format of the second control information is the third format
  • the 2-bit value when the 2-bit value is 01, it indicates that the format of the first control information is the first format a
  • the format of the second control information is the fourth format
  • when the 2-bit value is 10 indicates The format of the first control information is the second format a, and the format of the second control information is the third format
  • the 2-bit value when the 2-bit value is 11, it indicates that the format of the first control information is the second format a
  • the format of the second control information is Fourth format.
  • 1 bit in the first field indicates the format of the first control information and the format of the second control information
  • the value of the 1 bit indicates that the format of the first control information is the first format a.
  • the format of the second control information is the third format
  • the 1-bit value of 1 indicates that the format of the first control information is the second format a
  • the format of the second control information is the fourth format
  • the 1-bit The value of 1 indicates that the format of the first control information is the first format a, and the format of the second control information is the third format
  • the value of the 1 bit indicates that the format of the first control information is the second format a
  • the format of the second control information is the fourth format.
  • the first field may be the field Reserved (or 2nd-stage SCI format field) in SCI1-A and SCI1-B, and 2 bits in the field Reserved (or 2nd-stage SCI format) are used to indicate the first control The format of the information and the format of the second control information. For example, when the 2-bit value is 11, it indicates that the first control information is SCI1-B and the second control information is SCI2-C; when the 2-bit value is 01, it indicates that the first control information is SCI1-B.
  • the format of the information is SCI1-B, and the format of the second control information is SCI2-A; when the 2-bit value is 10, it indicates that the format of the first control information is SCI1-A, and the format of the second control information is SCI2-C; When the 2-bit value is 00, it indicates that the format of the first control information is SCI1-A, and the format of the second control information is SCI2-A.
  • the first field may be the field Reserved (or 2nd-stage SCI format field) in SCI1-A and SCI1-B, and use 1 bit in the field Reserved (or 2nd-stage SCI format) to indicate the first control
  • the format of the information and the format of the second control information For example, when the 1-bit value is 0, it indicates that the first control information is SCI1-B, and the second control information is SCI2-C. When the 1-bit value is 1, it indicates that the first control information is SCI1-B.
  • the format of the information is SCI1-A, and the format of the second control information is SCI2-A; or, when the 1-bit value is 1, it indicates that the first control information is SCI1-B, the second control information is SCI2-C, and the 1-bit value is SCI1-B. When the value is 0, it indicates that the format of the first control information is SCI1-A, and the format of the second control information is SCI2-A.
  • the Reserved field (or 2nd-stage SCI format field) in the SCI format in the standard protocol is modified, so that 2 bits or 1 bit in Reserved (or 2nd-stage SCI format) indicates the format of the first control information and the format of the second control information, in this way, only one field of the SCI format in the standard protocol is multiplexed, and the PSCCH signaling overhead will not be additionally increased, thereby ensuring the system transmission performance.
  • the first format a may further include: at least one field indicating the time-frequency resource.
  • the first terminal device reserves the time-frequency resource for the second terminal device to feed back the second signal through the at least one field, so as to ensure that the second signal can be fed back in time and successfully on the time-frequency resource.
  • the reserved time domain resources do not need to be occupied for a long time for a long time, but only a small part of the time-frequency pattern is reserved to satisfy the feedback of the second signal, so as to achieve optimal performance with as little overhead as possible.
  • two fields in the first format a indicate the time-frequency resources reserved for the second signal
  • one of the two fields may indicate the time-domain resources reserved for the second signal
  • the other field may indicate the reserved resources.
  • a field in the first format a is used to indicate the time-frequency resources reserved for the second signal, and this field can indicate the time-domain resources reserved for the second signal and the reserved frequency resources at the same time. domain resources. It can be understood that three or more fields in the first format a may indicate time-frequency resources, and the embodiment of the present application does not limit the number of fields indicating time-frequency resources.
  • SCI1-B multiplexes the Frequency resource assignment and Time resource assignment fields in SCI1-A, and the Frequency resource assignment and Time resource assignment fields in SCI1-B. Used to indicate the time-frequency resources reserved for the second signal, wherein the Frequency resource assignment field is used to indicate the reserved frequency domain resources, and the Time resource assignment field is used to indicate the reserved time domain resources. In this way, the PSCCH signaling overhead will not be additionally increased, and the system transmission performance is guaranteed.
  • the time-frequency resources reserved by the first terminal device for the second terminal device satisfy the processing of the second terminal device for the second signal. time capability, so as to ensure that the second terminal device has time to process the second signal, and feed back the processed second signal in a timely and successful manner to ensure the effective operation of the system.
  • the second terminal device needs to take a certain time to measure the channel state, thereby generating the channel state information, and set the reserved time-frequency resource location after the second terminal device completes the channel state measurement , the reserved time domain resource position can satisfy the second terminal equipment for CSI processing time capability (time processing capability of channel state information); for another example, if the second signal is power control auxiliary information, the second terminal equipment needs to occupy a certain time Measure power, etc., to generate power control auxiliary information, set the reserved time-frequency resource position after the second terminal device completes the power measurement, etc., the reserved time-domain resource position can satisfy the second terminal device for the corresponding auxiliary information.
  • the processing time capability (time processing capability of auxiliary information).
  • the third format further includes: at least one field for indicating a feedback type of the second signal.
  • the first terminal device indicates the feedback type of the second signal to be fed back by the second terminal device through the at least one field, thereby ensuring that the second signal such as channel state information, auxiliary resource selection information, positioning measurement information, and power control auxiliary information can be Effective and timely feedback to improve system performance.
  • a field in the third format is used to indicate the feedback type of the second signal
  • the field may include 2 bits, and different values of this field indicate different types of the second signal, for example, the 2-bit value is 00.
  • the 2-bit value is 01, it indicates that the feedback type of the second signal is the auxiliary information type; when the 2-bit value is 10, it indicates that the feedback type of the second signal is the positioning information type ;
  • the 2-bit value is 11, it indicates that the feedback type of the second signal is the power control type.
  • the number of fields used to indicate the second signal in the first format a and the number of bits included in each field can be determined according to the feedback type of the second signal; for example, if the second signal includes four types, the first A format a can indicate the second signal by one field containing 2 bits or more bits; the first format a can also indicate the second signal by two fields containing 2 bits or more bits in total, This embodiment of the present application does not limit this.
  • SCI2-C multiplexes the CSI request (channel state information request) field in SCI2-A, the CSI request field in SCI2-A occupies 1 bit, and the CSI request field in SCI2-C is extended from the original 1 bit.
  • X bits where X is a positive integer; different values of the X bits are used to indicate different types of the second signal; optionally, if the second signal includes four types, X may be 2. In this way, by multiplexing the CSI request field in SCI2-A, the system transmission performance is guaranteed.
  • the first format a further includes: at least one field indicating modulation, coding and demodulation pilot information used when the second terminal device feeds back the second signal.
  • the first terminal device instructs the second terminal device to use the modulation, coding and demodulation pilot information to feed back the second signal through the at least one field, thereby ensuring timely and successful feedback of the second signal.
  • the modulation, coding and demodulation pilot information may include: modulation and coding scheme, pilot pattern, number of pilot ports, modulation and coding scheme table indication, and the like.
  • the multiple fields in the first format a indicate the modulation coding and demodulation pilot information used when the second terminal equipment feeds back the second signal.
  • the modulation and coding and demodulation pilot information used when the second terminal equipment feeds back the second signal may be indicated by four fields; wherein, one field indicates the modulation and coding scheme used when the second terminal equipment feeds back the second signal, and one One field indicates the pilot pattern used when the second terminal equipment feeds back the second signal, one field indicates the modulation and coding scheme table used when the second terminal equipment feeds back the second signal, and one field indicates the second terminal equipment uses when feeding back the second signal. number of pilot ports.
  • SCI1-B multiplexes the Modulation and coding scheme (modulation and coding scheme) field, Additional MCS table indicator (additional modulation and coding scheme table) field, DMRS pattern (demodulation reference signal pattern) field in SCI1-A , Number of DMRS port (demodulation reference signal port number) field, among these four fields in SCI1-B, the Modulation and coding scheme field indicates the modulation and coding scheme used when the second terminal equipment feeds back the second signal; Additional MCS The table indicator field indicates the modulation and coding scheme table used when the second terminal equipment feeds back the second signal; the DMRS pattern field indicates the pilot pattern used when the second terminal equipment feeds back the second signal; the Number of DMRS port field indicates the second terminal equipment Port information when feeding back the second signal.
  • SCI1-B will not increase PSCCH signaling overhead and ensure system transmission performance.
  • the first format a further includes: at least one field indicating a period during which the second terminal device feeds back the second signal. In this way, when the first terminal device expects the second terminal device to periodically feed back the second signal, the first terminal device can instruct the second terminal device to feed back the second signal according to the period through the at least one field, thereby ensuring the effectiveness of the system run.
  • a field in the first format a can be used to indicate the period at which the second terminal device feeds back the second signal.
  • the second signal is channel state information
  • the first terminal device expects the second terminal device to send back the signal every 5ms.
  • the channel state information is fed back once; this field in the first format a can be used to indicate that the cycle of feeding back the channel state information by the second terminal device is 5ms.
  • more fields in the first format a may indicate the period during which the second terminal device feeds back the second signal, and the embodiment of the present application does not limit the number of fields for the period during which the second terminal device feeds back the second signal.
  • SCI1-B multiplexes the Resource reservation period (period of reserved resources) field in SCI1-A, and the Resource reservation period field in SCI1-B indicates the period during which the second terminal device feeds back the second signal.
  • the PSCCH signaling overhead will not be increased, and the system transmission performance is guaranteed.
  • the third format further includes: all bits of source identifiers (ie, first identifier information) of the first control information and the second control information, and the purpose of the first control information and the second control information All bits of the ground identification (ie the second identification information).
  • the first terminal device can only send the first control information and the second control information to the second terminal device, but does not send the associated data channel, at this time there is the source identifier and destination identifier of the physical layer L1, but the data link is lacking.
  • the source identification and destination identification of layer L2 in this way, the first terminal device can clearly indicate the source identification and the source identification of the first control information and the second control information through all bits of the source identification and all bits of the destination identification in the third format. destination identification, thereby ensuring that the object expected by the first terminal device can timely and successfully feed back the second signal.
  • two fields in the third format include all bits of the source identifiers of the first control information and the second control information, and all bits of the destination identifiers of the first control information and the second control information; wherein , one field contains all bits of the source identifiers of the first control information and the second control information, and the other field contains all the bits of the destination identifiers of the first control information and the second control information.
  • one field or more fields may contain all bits of the source identifiers of the first control information and the second control information, and all bits of the destination identifiers of the first control information and the second control information. , which is not limited in the embodiments of the present application.
  • SCI2-C multiplexes the Source ID (source identification) field and the Destination ID (destination identification) field in SCI2-A, and the Source ID field in SCI2-A only contains the source identification of the physical layer L1 , in the Source ID field in SCI2-C, fill in the source identification of physical layer L1 and data link layer L2; the Destination ID field in SCI2-A only contains the destination identification of physical layer L1, in SCI2-C Destination ID The ID field is filled with the destination identifiers of the physical layer L1 and the data link layer L2. In this way, the Source ID field and Destination ID field in SCI2-A are multiplexed as much as possible to ensure the system transmission performance.
  • SCI2-C multiplexes the New data indicator (new data indication, NDI) field, Redundancy version (redundancy version) field, HARQ feedback enabled/disabled indicator (Hybrid Automatic Repeat Request Processing Feedback) in SCI2-A enable/disable indication) field, Source ID field and Destination ID field.
  • the first terminal device and the second terminal device pre-agreed that when the second control information is SCI2-C, the corresponding NDI, redundancy version, and HARQ feedback enable/disable instructions are processed according to the pre-agreed process, so that NDI, redundancy Reversion and HARQ feedback enable/disable indicate the presence of idle bits.
  • the Source ID field indicates the source identification of the physical layer L1
  • the Destination ID field indicates the destination identification of the physical layer L1
  • the NDI, redundancy version and HARQ feedback enable/disable bits indicate that the field is free It can be used to indicate the source identifier of the data link layer L2 of SCI1-B and SCI2-C, and the destination identifier of the data link layer L2 of SCI1-B and SCI2-C. If the above idle bits are insufficient, it can be used. Further complement by adding bits.
  • the idle bits in the New data indicator and HARQ feedback enabled/disabled indicator fields in SCI2-C can be filled with all bits of the source identification of the data link layer L2 of SCI1-B and SCI2-C, and in the Redundancy version field The idle bits of the data link layer L2 of SCI1-B and SCI2-C are filled with all bits of the destination identification.
  • the idle bits in the New data indicator and HARQ feedback enabled/disabled indicator fields in SCI2-C can be Complete all bits of the destination of the data link layer L2 of SCI1-B and SCI2-C, and the idle bits in the Redundancy version field are filled with all bits of the source identification of the data link layer L2 of SCI1-B and SCI2-C ; If the above idle bits are insufficient, it can be further supplemented by adding bits. In this way, the system transmission performance is guaranteed by multiplexing the New data indicator field, HARQ feedback enabled/disabled indicator field, Redundancy version field, Source ID field and Destination ID field in SCI2-A.
  • first control information and the second control information may further include other fields, which are not limited in this embodiment of the present application.
  • SCI1-B multiplexes the fields in SCI1-A
  • Table 3 shows the same fields in SCI1-B and SCI1-A.
  • SCI1-A is the existing standard protocol SCI format, in which the reserved 2-bit value in the Reserved field is 00 by default, indicating that the SCI1 is SCI1-A; the fields in SCI1-A and the corresponding interpretations of each field It is the same as the field in SCI1-A and the corresponding interpretation of each field in the standard protocol.
  • SCI1-B contains the same fields as SCI1-A, but there are differences in the interpretation of the same fields.
  • the Priority field indicates the priority of the time-frequency resource occupied by the first terminal device for the current transmission and the priority of the time-frequency resource reserved in the future
  • in SCI1-A B indicates the priority of the time-frequency resources reserved by the first terminal device for the second terminal device.
  • the Frequency resource assignment field indicates in SCI1-A the time-frequency resources occupied by the first terminal equipment for the current transmission and the frequency domain resources reserved in the future
  • in SCI1-B indicates that the first terminal equipment feeds back the first terminal equipment for the second terminal equipment.
  • the frequency domain resources reserved for the second signal is the frequency domain resources reserved for the second signal.
  • the Time resource assignment field indicates in SCI1-A the time-frequency resources occupied by the first terminal equipment for the current transmission and the time domain resources reserved in the future, and in SCI1-B indicates that the first terminal equipment feeds back the first terminal equipment for the second terminal equipment.
  • Two signal reserved time domain resources indicates the period of time domain resources reserved by the first terminal device for the future in SCI1-A, and the period in which the first terminal device instructs the second terminal device to feed back the second signal in SCI1-B.
  • the DMRS pattern field indicates the pilot pattern transmitted by the first terminal equipment in SCI1-A, and indicates the pilot pattern used when the first terminal equipment instructs the second terminal equipment to feed back the second signal in SCI1-B.
  • the 2nd-stage SCI format field indicates the format of the corresponding SCI2 indicated by SCI1-A in SCI1-A, and the SCI2 format corresponding to SCI1-B in SCI1-B is SCI2-C.
  • the Beta_offset indicator (beta offset indication) field indicates the relevant parameters of SCI 2 in SCI1-A and the relevant parameters of SCI2-C in SCI1-B.
  • the Number of DMRS port field indicates the port information transmitted by the first terminal device in SCI1-A, and in SCI1-B, indicates that the first terminal device instructs the second terminal device to feed back the port information of the second signal.
  • the Modulation and coding scheme field indicates the MCS transmitted by the first terminal device in SCI1-A, and the MCS used when the first terminal device instructs the second terminal device to feed back the second signal in SCI1-B.
  • the Additional MCS table indicator field indicates the MCS Table transmitted by the first terminal equipment in SCI1-A, and in SCI1-B, indicates that the first terminal equipment instructs the second terminal equipment to feed back the MCS Table of the second signal.
  • PSFCH overhead indication (PSFCH overhead indication) field in SCI1-A instructs the first terminal device to transmit the corresponding PSFCH overhead information
  • in SCI1-B instructs the first terminal device to instruct the second terminal device to feed back the PSFCH overhead information of the instruction message.
  • the Reserved field is reserved bits in SCI1-A and has no additional indication information. In SCI1-B, the indicated format is SCI1-B.
  • SCI2-C multiplexes the fields in SCI2-A
  • Table 4 is the interpretation comparison table of the same fields in SCI2-C and SCI2-A.
  • SCI2-A is an existing standard protocol SCI format, and the corresponding definitions of fields and fields in SCI2-A are the same as those in SCI2-A of the standard protocol.
  • SCI2-C contains the same fields as SCI2-A, but there are differences in the interpretation of the same fields.
  • the HARQ process number (Hybrid Automatic Repeat Request Processing Process Number) field indicates the HARQ processing process number transmitted by the first terminal device in SCI2-A, and indicates the first terminal device in SCI2-C to indicate the number of the first terminal device.
  • the second terminal equipment feeds back the HARQ process ID of the second signal.
  • the New data indicator field indicates the NDI information transmitted by the first terminal device in SCI2-A, and in SCI2-C, indicates that the first terminal device instructs the second terminal device to feed back the NDI information of the second signal.
  • the Redundancy version field indicates the redundancy version number transmitted by the first terminal device in SCI2-A, and in SCI2-C, indicates the first terminal device instructs the second terminal device to feed back the redundancy version number of the second signal.
  • Source ID field instructs the first terminal device to transmit the corresponding source ID in SCI2-A, and instructs the first terminal device to transmit the corresponding source ID of physical layer L1 and source ID information of data link layer L2 in SCI2-C .
  • Destination ID field instructs the first terminal device to transmit the corresponding destination ID in SCI2-A, and instructs the first terminal device to transmit the corresponding destination ID of physical layer L1 and destination ID information of data link layer L2 in SCI2-C .
  • the HARQ feedback enabled/disabled indicator field indicates in SCI2-A whether the first terminal device transmits the associated HARQ feedback is enabled, and in SCI2-C indicates whether the first terminal device instructs the second terminal device to feedback whether the second signal has HARQ feedback.
  • the Cast type indicator (type conversion indication) field indicates the Cast type transmitted by the first terminal device in SCI2-A, and the Cast type transmitted by the first terminal device in SCI2-C.
  • the CSI request field in SCI2-A, instructs the first terminal device to trigger the second terminal device to feed back CSI, and in SCI2-C instructs the first terminal device to instruct the second terminal device to feed back the feedback type of the second signal.
  • the SCI in the sidelink includes indication information such as time-frequency resources transmitted by the TxUE, and is not related to the time-frequency resources and other information fed back by the RxUE.
  • indication information such as time-frequency resources transmitted by the TxUE
  • the RxUE by reusing the format and fields in the standard protocol SCI, there is no need to create a new field, and a slight modification is made on the basis of the existing fields of SCI1-A and SCI2-A to obtain newly defined SCI1-B and SCI2-C , SCI1-B and SCI2-C instruct the RxUE to feed back information such as the reserved time-frequency resources of the second signal, thereby ensuring timely and successful feedback of important messages and improving system performance.
  • SCI1-B and SCI2-C have no new fields to ensure system transmission performance.
  • the first terminal device when the first terminal device sends the first signal to the second terminal device, if the second terminal device needs to feed back the second signal in a timely and guaranteed manner, the time-frequency can be reserved for the second signal resources, at this time, the first terminal device can send SCI1-B and SCI2-C to the second terminal device, thereby indicating the time-frequency resources reserved for the second terminal device to feed back the second signal, the feedback type of the second signal, and Information such as modulation and coding of the second signal is fed back.
  • the first terminal device reserves time-frequency resources for the second signal by sending the sidelink control information SCI1-B and SCI2-C, thereby ensuring timely and successful feedback of the second signal and improving the performance of the communication system.
  • the second terminal device receives the first control information and the second control information sent by the first terminal device.
  • the first control information may include at least one of a first field or a second field, at least one of the first field or the second field indicates the format of the first control information, the first field or the second field At least one indicates the format of the second control information.
  • the format of the first control information includes at least a first format a and a second format a, wherein the first format a indicates the time-frequency resource of the second signal fed back by the second terminal device, and the second format a indicates the first terminal device to send a data channel transmission information.
  • the format of the second control information includes at least a third format and a fourth format, wherein the third format indicates that the second terminal device feeds back a redundant version of the second signal, and the fourth format indicates that the first terminal device sends a redundant version of the data channel .
  • the second terminal device determines the format of the first control information and the format of the second control information according to the first field and/or the second field. If it is determined that the format of the received first control information is the first format a and the format of the second control information is the third format, for example, what the second terminal device receives is the SCI1-B and SCI2- C, the second terminal device determines the preview time-frequency resources, modulation coding and other information indicated by the fields in the first format a and the second format a, and prepares to feed back the information expected by the first terminal device on the reserved time-frequency resources second signal.
  • the second terminal device determines the time-frequency resource for feeding back the second signal according to at least one field included in the first format a that indicates the time-frequency resource.
  • the time-frequency resource satisfies The time processing capability of the second terminal device for the second signal.
  • the second terminal device may determine the frequency domain resource for feeding back the second signal through the Frequency resource assignment field in SCI1-B, and determine the time domain resource for feeding back the second signal through the Time resource assignment field in SCI1-B.
  • the second terminal device determines the feedback type of the second signal according to at least one field included in the third format that indicates the second signal. For example, the second terminal device may determine the feedback type of the second signal through the CSI request in the SCI2-C.
  • the second terminal device determines, according to at least one field in the first format a that indicates the modulation, coding and demodulation pilot information used when the second terminal device feeds back the second signal, to determine the feedback first Modulation coding and demodulation pilot information used when two signals are used.
  • the second terminal device can use the Modulation and coding scheme field in SCI1-B to determine the modulation and coding scheme used when feeding back the second signal; or, use the Additional MCS table indicator field in SCI1-B to determine to feed back the second signal Modulation and coding scheme table used when; or, determine the pilot pattern used when feeding back the second signal through the DMRS pattern field in SCI1-B; or, determine the feedback second signal through the Number of DMRS port field in SCI1-B port information.
  • the second terminal device determines the cycle of feeding back the second signal according to at least one field included in the first format a that indicates the cycle of feeding back the second signal by the second terminal device. For example, the second terminal device may determine the period for feeding back the second signal through the Resource reservation period field in SCI1-B.
  • the second terminal device uses all bits of the source identifiers of the first control information and the second control information included in the third format, and the destination of the first control information and the second control information All bits of the identifier are used to determine the source identifier and the destination identifier of the first control information and the second control information.
  • the second terminal device can determine the source identifier of the SCI2-C through the source identifiers of the physical layer L1 and the data link layer L2 in the Source ID field in the SCI2-C, and determine the source identifier of the SCI2-C through the source identifiers of the physical layer L1 and the data link layer L2 in the Destination ID field in the SCI2-C.
  • the destination identity of link layer L2 determines the destination identity of SCI2-C.
  • the second terminal device determines the attribution of the message transmitted this time by using the first control information and the source identifier and destination identifier of the second control information.
  • the second terminal device does not use the above-mentioned time-frequency resources if the device's own identity is different, so that it can avoid the reserved time-frequency resources and ensure the timely and successful feedback of the second signal on the time-frequency resources.
  • the second terminal device may determine whether to perform avoidance on the reserved time-frequency resources according to the priority of the time-frequency resources, so as to ensure successful transmission of data with higher priority and improve system performance.
  • Step 1002 When the first control information is in the first format a and the second control information is in the third format, the second terminal device feeds back the second signal to the first terminal device on the above time-frequency resources.
  • the second terminal device can directly send the first terminal to the first terminal on the reserved time-frequency resources determined in the above step 1001
  • the device feeds back the second signal; the timely and successful feedback of the second signal is ensured, and the system performance is improved; at the same time, the second terminal device does not need to select time-frequency resources through channel competition, nor does it need to send control information, saving the second terminal The power consumption of the device.
  • the second terminal device may, on the above-determined time-frequency resource, feed back the content of the second signal that needs to be fed back according to the determined modulation and coding and demodulation pilot information used when sending the second signal,
  • the second signals such as channel state information, auxiliary resource selection information, positioning measurement information, and power control auxiliary information can be fed back effectively and in a timely manner, thereby improving system performance.
  • the second terminal device can also feed back the second signal in time according to the determined cycle of feeding back the second signal, so as to ensure the effective operation of the system.
  • the second terminal device when the second terminal device receives SCI1-B and SCI2-C, the second terminal device can use Frequency resource assignment, Time resource assignment, CSI request, Modulation and coding scheme, Number of DMRS in SCI1-B The information determined by the fields such as port and Resource reservation period is fed back to the second signal.
  • the second terminal device may feed back HARQ for the first control information and the second control information , or the HARQ for the first control information and the second control information is not fed back.
  • the manner of feeding back the above-mentioned HARQ information includes: sending an acknowledgement message (Acknowledgement, ACK) or sending a negative acknowledgement (Negative Acknowledgement, NACK).
  • the second terminal device may not feed back the HARQ for SCI1-B and SCI2-C, but may also feed back the HARQ for SCI1-B and SCI2-C.
  • the second terminal equipment feeds back HARQ for SCI1-B and SCI2-C, if the reception fails, the HARQ-NACK information is transmitted on the PSFCH, and in other cases, no information is transmitted on the PSFCH; or, if the reception is successful, the PSFCH HARQ-ACK information is transmitted up, and if it fails, HARQ-NACK information is transmitted.
  • the first terminal device receives the second signal fed back by the second terminal device on the above-mentioned time-frequency resource.
  • the first terminal device can directly receive the second signal fed back by the second terminal device on the time-frequency resource, There is no need to blindly detect the time-frequency resource where the second signal is located, and no need to detect control information, which saves the power consumption of the first terminal device.
  • the first terminal device can receive the second signal fed back by the second terminal device on the time domain resources specified by the Frequency resource assignment field and the Time resource assignment field in SCI1-B .
  • the first terminal device may detect HARQ for the first control information and the second control information , the HARQ for the first control information and the second control information may not be detected.
  • the first terminal device can receive the HARQ, thereby improving the reliability of communication between the first terminal device and the second terminal device. sex.
  • the first terminal device may not detect HARQ for SCI1-B and SCI2-C; it may also detect HARQ for SCI1-B and SCI2-C.
  • the first terminal device may receive the HARQ if the second terminal device feeds back the HARQ for SCI1-B and SCI2-C.
  • the first control information includes at least one of the first field or the second field, and at least one of the first field or the second field indicates the format of the first control information, and the first field or the second field indicates the format of the first control information.
  • At least one of the two fields indicates the format of the second control information; the first format a of the first control information indicates the time-frequency resource of the second signal fed back by the second terminal device, and the third format of the second control information indicates the second terminal
  • the device feeds back the redundant version of the second signal. In this way, by reserving time-frequency resources for the second signal, timely and successful feedback of the second signal is ensured, and system performance is improved.
  • FIG. 11 is another schematic flowchart of a signal exchange between a first terminal device and a second terminal device provided by the present application.
  • Step 1101 the first terminal device sends the first control information, the second control information and the data channel (or data information) to the second terminal device.
  • the first control information instructs the first terminal device to send the transmission information of the data channel; wherein, the content of the transmission information may refer to the above-mentioned relevant description, which will not be repeated here.
  • the first control information and the second control information are SCI
  • the data channel is PSSCH.
  • the first control information may be an existing first-level SCI1, for example, may be SCI1-A in a standard protocol; the fields included in SCI1-A and the definitions of each field can refer to Table 3 above.
  • the first control information may include at least one field indicating the format of the second control information; the format of the second control information includes at least a first format b and a second format b, and the first format b instructs the second terminal device to feed back the second
  • the time-frequency resource of the signal that is, the second allocation resource
  • the second format b indicates the redundant version of the data channel sent by the first terminal device; wherein, the content of the second signal, time-frequency resource, etc. can refer to the previous related expressions, here No longer.
  • the second format b may be the existing secondary SCI2, for example, may be SCI2-A or SCI2-B in the standard protocol.
  • SCI2-A is exemplified, and the fields contained in SCI2-A and the definition of each field can be found in Table 4; B difference, in the embodiment of this application, the new secondary SCI2 is defined as SCI2-D; wherein, SCI2-D includes at least one field in SCI2-A, and on this basis, the newly added field carries the reserved time frequency resources and other information.
  • the first control information may indicate the format of the second control information through a field, and different values of the field may indicate the format of the second control information.
  • the bit indicates the format of the second control information. For example, when the 2-bit value is 11 (or 10), it indicates that the format of the second control information is the first format b, and when the 2-bit value is 00 (or 01), it indicates the second control information.
  • the format of the information is the second format b.
  • the field may be the field Reserved of SCI1-A, and the format of the second control information is indicated by 2 bits in the field Reserved. For example, when the value of the 2 bits is 00, it indicates that the second control information is SCI2-A, When the 2-bit value is 11, it indicates that the second control information is SCI2-D; or, the field can be the field 2nd-stage SCI format in SCI1-A, and the 2 bits in the field 2nd-stage SCI format are used to indicate the second The format of the control information, for example, when the 2-bit value is 00, it indicates that the second control information is SCI2-A, and when the 2-bit value is 10, it indicates that the second control information is SCI2-D.
  • the Reserved field or 2nd-stage SCI format field in the SCI format SCI1-A in the standard protocol is modified, and the 2 bits in the Reserved field in SCI1-A are used to indicate the format of the second control information, or the 2nd-stage SCI format is used.
  • the 2 bits in the stage SCI format indicate the format of the second control information.
  • the above-mentioned first format b may include: at least one field indicating the above-mentioned time-frequency resource.
  • the first terminal device reserves time-frequency resources for the second terminal device to feed back the second signal through the at least one field, ensuring that the second signal can be fed back in time and successfully on part or all of the time-frequency resources.
  • the specific content of the time-frequency resources reserved for the second signal indicated by the different numbers of fields in the first format b may refer to the relevant descriptions in the first format a above, which will not be repeated here. It should be noted that, Different from the multiplexing field in the first format a, the fields in the first format b are newly added fields.
  • the Frequency resource assignment field and the Time resource assignment field are newly added in SCI2-D.
  • These two fields in SCI2-D, Frequency resource assignment field and Time resource assignment field, are used to indicate the first Two signal reserved time-frequency resources, wherein the Frequency resource assignment field is used to indicate the reserved frequency domain resources, and the Time resource assignment field is used to indicate the reserved time domain resources.
  • the time-frequency resources reserved by the first terminal device for the second terminal device satisfy the time required by the second terminal device for the second signal Therefore, it can ensure that the second terminal device has time to process the second signal, and feed back the processed second signal in a timely and successful manner to ensure the effective operation of the system.
  • the above-mentioned first format b may further include: at least one field for indicating the feedback type of the second signal, so that the first terminal device indicates through the at least one field that the second terminal device needs feedback This ensures that the second signals such as channel state information, auxiliary resource selection information, positioning measurement information, and power control auxiliary information can be fed back effectively and in a timely manner to improve system performance.
  • SCI2-D multiplexes the CSI request (channel state information request) field in SCI2-A, the CSI request field in SCI2-A occupies 1 bit, and the CSI request field in SCI2-D is extended from the original 1 bit.
  • X bits where X is a positive integer; different values of the X bits are used to indicate different types of the second signal; optionally, if the second signal includes four types, X may be 2. In this way, by multiplexing the CSI request field in SCI2-A, the system transmission performance is guaranteed.
  • the above-mentioned first format b may further include: at least one field indicating a period during which the second terminal device feeds back the second signal. In this way, when the first terminal device expects the second terminal device to periodically feed back the second signal, the first terminal device can instruct the second terminal device to feed back the second signal according to the period through the at least one field, thereby ensuring the effectiveness of the system run.
  • the specific content of the cycle of feeding back the second signal indicated in the first format b may refer to the relevant description in the first format a above, which will not be repeated here. It should be noted that the multiplexing field with the first format a The difference is that the fields in the first format b are newly added fields.
  • SCI2-D adds a Resource reservation period field on the basis of SCI2-A, and the Resource reservation period field in SCI2-D indicates the period during which the second terminal device feeds back the second signal.
  • first control information and the second control information may further include other fields, which are not limited in this embodiment of the present application.
  • the definitions of the fields in SCI1-A can refer to Table 3 above, in This will not go into details.
  • the reserved 2-bit value in the Reserved field is 00 by default, indicating that the SCI1 is SCI1-A.
  • 1 bit in the Reserved field can be used to indicate the format of the second control information;
  • SCI2-D can include SCI2-A All fields in the SCI2-A and SCI2-D fields, and on this basis, some new fields are added, such as the SCI2-A and SCI2-D field interpretation comparison table exemplarily shown in Table 5.
  • the HARQ process number field in both SCI2-A and SCI2-D indicates the HARQ processing process number transmitted by the first terminal device.
  • the New data indicator field indicates the NDI information transmitted by the first terminal device in both SCI2-A and SCI2-D.
  • the Redundancy version field indicates the redundancy version number transmitted by the first terminal device in both SCI2-A and SCI2-D.
  • the Source ID field in both SCI2-A and SCI2-D, indicates that the first terminal device transmits the corresponding source ID.
  • the Destination ID field, in both SCI2-A and SCI2-D indicates that the first terminal device transmits the corresponding destination ID.
  • the HARQ feedback enabled/disabled indicator field indicates whether the first terminal equipment transmits the associated HARQ feedback is enabled.
  • the Cast type indicator field indicates the Cast type transmitted by the first terminal device in both SCI2-A and SCI2-D.
  • the CSI request field instructs the first terminal device to trigger the CSI fed back by the second terminal device, and in SCI2-D, instructs the first terminal device to instruct the second terminal device to feed back the feedback type of the second signal.
  • SCI2-D also includes: the newly added Frequency resource assignment field, which indicates the reserved frequency domain resources; the newly added Time resource assignment field, which indicates the reserved time domain resources; the newly added Resource reservation period field, which indicates The period during which the second terminal device feeds back the second signal.
  • the SCI in the sidelink includes indication information such as time-frequency resources transmitted by the TxUE, and is not related to the time-frequency resources and other information fed back by the RxUE.
  • indication information such as time-frequency resources transmitted by the TxUE, and is not related to the time-frequency resources and other information fed back by the RxUE.
  • new fields are added to carry information such as reserved time-frequency resources, and the SCI is used comprehensively as similar to DL Grant (downlink grant) and UL Grant (uplink grant).
  • SCI2-D instructs the RxUE to feed back information such as the reserved time-frequency resources of the second signal to ensure timely and successful feedback of important messages. , to improve system performance.
  • SCI2-D redefines only one field, and the interpretation of other fields remains unchanged, so that the field interpretation of SCI2-A in the existing protocol is changed as little as possible, and the newly defined SCI2-D is improved. applicability.
  • time-frequency resources may be reserved for the second signal.
  • the first terminal device can send SCI1-A, SCI2-D and PSSCH to the second terminal device, thereby indicating the transmission information of the PSSCH through SCI1-A, and indicating the second terminal device to feed back the second signal through SCI2-D Information such as reserved time-frequency resources, feedback type of the second signal, etc., is provided through SCI1-A, such as modulation and coding information.
  • the first terminal device reserves time-frequency resources for the second signal by sending the sidelink control information SCI2-D, SCI1-A and PSSCH, thereby ensuring timely and successful feedback of the second signal and improving SL-U communication system performance.
  • the second terminal device receives the first control information, the second control information and the data channel sent by the first terminal device.
  • the first control information instructs the first terminal device to send transmission information of the data channel;
  • the first control information includes at least one field indicating the format of the second control information;
  • the format of the second control information includes at least the first format b and the second format Format b,
  • the first format b indicates the time-frequency resource of the second signal fed back by the second terminal device;
  • the second format b indicates the redundancy version of the data channel sent by the first terminal device.
  • the second terminal device determines the format of the second control information according to the field indicating the format of the second control information in the first control information; if it is determined that the format of the received second control information is the first format b, for example, the first
  • the second control information received by the second terminal device is SCI2-D; then the second terminal device determines the preview time-frequency resources indicated by the fields in the first format b, the cycle of the feedback instruction message, etc.
  • the second signal expected by the first terminal device is fed back on the frequency resource.
  • the second terminal device determines the time-frequency resource for feeding back the second signal according to at least one field included in the first format b that indicates the above-mentioned time-frequency resource.
  • the resource satisfies the time processing capability of the second terminal device for the second signal.
  • the second terminal device may determine the frequency domain resource for feeding back the second signal through the Frequency resource assignment field in SCI2-D, and determine the time domain resource for feeding back the second signal through the Time resource assignment field in SCI2-D.
  • the second terminal device may further use the part of the time-frequency resource with weak or no interference as the time-frequency resource for feeding back the second signal according to the signal interference situation of the above-mentioned time-frequency resource, so as to The transmission performance is guaranteed, and/or the second terminal device may use a part of the time-frequency resources as the time-frequency resources for feeding back the second signal according to the data amount of the second signal to be fed back, thereby saving overhead.
  • the second terminal device determines the feedback type of the second signal according to at least one field included in the foregoing first format b that indicates the second signal. For example, the second terminal device may determine the feedback type of the second signal through the CSI request in the SCI2-D.
  • the second terminal device determines the cycle of feeding back the second signal according to at least one field included in the first format b that indicates the cycle of feeding back the second signal by the second terminal device. For example, the second terminal device may determine the period for feeding back the second signal through the Resource reservation period field in the SCI2-D.
  • the second terminal device determines the first terminal device according to the Source ID field and the Destination ID field in the above-mentioned first format b, and the source identifier and destination identifier of the data link layer L2 contained in the data channel. A source identification and a destination identification of the control information and the second control information.
  • the second terminal device does not use the above time-frequency resources, so that the reserved time-frequency resources can be avoided to ensure the second signal Timely and successful feedback on this time-frequency resource.
  • the second terminal device may determine whether to perform avoidance on the reserved time-frequency resources according to the priority of the time-frequency resources, so as to ensure successful transmission of data with higher priority and improve system performance.
  • Step 1102 when the second control information is in the first format b, the second terminal device sends a second signal to the first terminal device, instructs the second terminal device to send the control information of the transmission information of the second signal, and instructs the second terminal The device sends the control information of the redundant version of the second signal; wherein, the second signal occupies part or all of the reserved time-frequency resources.
  • the second terminal device can directly feed back the second signal to the first terminal device on the reserved time-frequency resources determined in the above step 1101, thereby ensuring the first The timely and successful feedback of the second signal improves the system performance.
  • the second terminal device does not need to select time-frequency resources through channel competition, thereby saving the power consumption of the second terminal device.
  • the second terminal device may multiplex the modulation, coding and demodulation pilot information indicated by the first control information on the time-frequency resource determined above, and feed back the content of the second signal that needs to be fed back, thereby ensuring the channel Second signals such as status information, auxiliary resource selection information, positioning measurement information, and power control auxiliary information can be fed back effectively and in a timely manner to improve system performance. Further, the second terminal device can also feed back the second signal in time according to the determined cycle of feeding back the second signal, so as to ensure the effective operation of the system.
  • Second signals such as status information, auxiliary resource selection information, positioning measurement information, and power control auxiliary information can be fed back effectively and in a timely manner to improve system performance.
  • the second terminal device can also feed back the second signal in time according to the determined cycle of feeding back the second signal, so as to ensure the effective operation of the system.
  • the second terminal device may determine the value according to the Frequency resource assignment, Time resource assignment, CSI request, Resource reservation period and other fields in SCI2-D. information and information determined by fields such as Modulation and coding scheme and Number of DMRS port in SCI1-A, and feed back the second signal.
  • the second terminal device may also feed back the HARQ for the data channel sent by the first terminal device.
  • the manner of feeding back the above-mentioned HARQ information includes: ACK or NACK.
  • the second terminal device when the second terminal device receives SCI1-A and SCI2-D and a data channel, the second terminal device can feed back HARQ for the data channel. If the second terminal device fails to receive the data channel, it transmits the HARQ-NACK information on the PSFCH, and otherwise does not transmit the information on the PSFCH; or, if the second terminal device successfully receives the data channel, transmits the HARQ-ACK information on the PSFCH. , if receiving the data channel fails, the HARQ-NACK information is transmitted on the PSFCH.
  • the first terminal device receives the second signal sent by the second terminal device, the control information instructing the second terminal device to send the transmission information of the second signal, and the instruction
  • the second terminal device sends the control information of the redundant version of the second signal; wherein, the second signal occupies part or all of the reserved time-frequency resources.
  • the first terminal device can directly receive the second signal fed back by the second terminal device on the time-frequency resource, so as to obtain the desired second signal in time.
  • the first terminal device After sending SCI1-A and SCI2-D, the first terminal device can receive the second signal fed back by the second terminal device on the time domain resources specified by the Frequency resource assignment field and the Time resource assignment field in SCI2-D.
  • the first terminal device may also receive the HARQ for the data channel fed back by the second terminal device.
  • the reliability of communication between the first terminal device and the second terminal device is improved.
  • the manner of feeding back the above-mentioned HARQ information includes: ACK or NACK.
  • the first terminal device may determine that the second terminal device fails to receive the data channel, and retransmit it.
  • the HARQ information fed back by the second terminal device for the data channel the first terminal device may determine that the second terminal device successfully received the data channel; or, if the first terminal device receives the HARQ-ACK information fed back by the second terminal device for the data channel , the first terminal device can determine that the second terminal device has successfully received the data channel, and if the first terminal device receives the HARQ-NACK information fed back by the second terminal device for the data channel, the first terminal device can determine that the second terminal device Receiving the data channel fails and retransmits it.
  • the first control information instructs the first terminal device to send transmission information of the data channel;
  • the first control information includes at least one field indicating the format of the second control information;
  • the first format b of the second control information is used for Instruct the second terminal device to feed back time-frequency resources of the second signal; in this way, by reserving time-frequency resources for the second signal, timely and successful feedback of the second signal is ensured, and system performance is improved.
  • FIG. 12 is a schematic diagram of a resource allocation exemplarily provided for this application.
  • both SCI_U and SCI_D may be the newly defined secondary SCI2, where SCI_U is the first terminal device
  • SCI_D is the second-level SCI2 sent by the first device to the first terminal device.
  • the SCI_D includes first indication information and second indication information, and the first indication information is used to indicate the first allocated resources (as shown in Figure 12 by Tx resources). ), the second indication information is used to indicate the second allocated resources (represented by Rx resources in FIG. 12 ).
  • the first terminal device first sends the SCI_U to the first device, and the first device receives the SCI_U. Then, the first apparatus generates SCI_D according to SCI_U, and sends SCI_D to the first terminal device, where SCI_D indicates Tx resources and Rx resources. Correspondingly, the first terminal device sends the first signal to the second terminal device on the Tx resource, and the second terminal device sends the second signal to the second terminal device on the Rx resource.
  • FIG. 13 is a schematic diagram of another resource allocation exemplarily provided by this application.
  • the resource type may be the auxiliary information type, and the first signal Specifically, a zero-power reference signal can be used to measure adjacent group or inter-system interference, and the second signal is specifically auxiliary resource selection information, and the auxiliary resource selection information includes resource identifier, RSRP, and SINR.
  • the resource type may be 3I type, the first signal is specifically CSI-RS, and the second signal is channel state information specifically, which may be 3I information, and the 3I information specifically includes PMI, CQI, RI.
  • the resource type may be a power control type
  • the first signal is specifically a DMRS
  • the second signal is specifically a power control auxiliary information.
  • the power control auxiliary information may specifically include the signal power and interference power.
  • the methods and operations implemented by the terminal device can also be implemented by components (such as chips or circuits) that can be used in the terminal device, and the methods and operations implemented by the network device can also be implemented by A component (eg, chip or circuit) implementation that can be used in a network device.
  • components such as chips or circuits
  • a component eg, chip or circuit
  • the methods provided by the embodiments of the present application are respectively introduced from the perspective of interaction between various devices.
  • the terminal device and the network device may include hardware structures and/or software modules, and the above functions are implemented in the form of hardware structures, software modules, or hardware structures plus software modules. . Whether one of the above functions is performed in the form of a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraints of the technical solution.
  • each functional module in each embodiment of the present application may be integrated into one processor, or may exist physically alone, or two or more modules may be integrated into one module.
  • the above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules.
  • FIG. 14 and FIG. 15 are schematic structural diagrams of possible communication apparatuses provided by the present application. These communication apparatuses can be used to implement the functions of the first terminal device or the first apparatus in the above method embodiments, and thus can also achieve the beneficial effects of the above method embodiments.
  • the communication device may be terminal device 1 or network device as shown in FIG. 1 , or the communication device may be terminal device 1 or terminal device 0 as shown in FIG. 3 , of course, the communication device may also be Modules (such as chips) applied to terminal equipment or network equipment.
  • the communication device 1400 includes a processing module 1401 and a transceiver module 1402 .
  • the communication apparatus 1400 is configured to implement the function of the first terminal device or the first apparatus in the foregoing method embodiments.
  • the processing module 1401 is used to control the transceiver module 1402 to send a resource request to the first device, the resource request is used to request the first resource and the second resource, and the first resource is used by the communication device 1400 to send the second terminal.
  • the device sends the first signal, and the second resource is used for the communication device 1400 to receive the second signal from the second terminal device;
  • the processing module 1401 is further configured to control the transceiver module 1402 to receive a resource response from the first device in response to the resource request.
  • the first apparatus is a group head terminal device or a network device.
  • the resource request includes the data amount of the first data in the first signal, and/or the data amount of the second data in the second signal.
  • the resource request includes the type of the first signal and/or the feedback type of the second signal.
  • the communication device 1400 includes pre-configuration information, the pre-configuration information includes a plurality of index information, and each index information corresponds to a preset resource; the resource request includes first index information, the first index information is one of multiple index information, and the first resource is a preset resource corresponding to the first index information.
  • the pre-configuration information further includes multiple types, and each type corresponds to at least one index information;
  • the resource request further includes the type of the first signal, and the type of the first signal is one of the multiple types,
  • the first index information is one of at least one index information corresponding to the type of the first signal.
  • the resource request further includes feedback information of the second signal
  • the feedback information of the second signal includes a feedback type of the second signal and a feedback element corresponding to the feedback type of the second signal.
  • the resource request further includes feedback time information, where the feedback time information is used to indicate time domain resources and/or periodic resources that bear the second signal.
  • the processing module 1401 is further configured to control the transceiver module 1402 to send control information to the second terminal device, wherein the control information includes the first indication information and/or the first indication information obtained by the communication apparatus 1400 from the resource response.
  • the control information includes the first indication information and/or the first indication information obtained by the communication apparatus 1400 from the resource response.
  • Two indication information the first indication information instructs the communication apparatus 1400 to send the resource of the first signal
  • the second indication information instructs the communication apparatus 1400 to receive the resource of the second signal.
  • control information further includes a preset feedback type
  • feedback type of the second signal is the same as the preset feedback type in the control information.
  • the processing module 1401 is further configured to control the transceiver module 1402 to send the first signal to the second terminal device according to the first indication information in the resource response, and/or control the transceiver module 1402 to transmit the first signal according to the first indication information in the resource response.
  • the second indication information is to receive the second signal from the second terminal device.
  • the second signal is sent by the second terminal device to the communication apparatus 1400 in response to the first signal.
  • the feedback type includes at least one or more of channel state type, positioning information type, auxiliary information type, and power control type; wherein, the feedback element corresponding to the channel state type at least includes CQI, RI, One or more of PMI; the feedback element corresponding to the positioning information type includes at least one or more of RTT, AOA, and AoD; the feedback element corresponding to the auxiliary information type includes at least one of resource identifier, RSRP, SINR or Multiple items; the feedback element corresponding to the power control type includes at least signal power and/or interference power.
  • the processing module 1401 is configured to control the transceiver module 1402 to receive a resource request from the first terminal device, the resource request is used to request a first resource and a second resource, and the first resource is the first resource sent by the first terminal device to the first terminal device.
  • the second resource is used by the second terminal device to send the first signal, and the second resource is the resource used by the first terminal device to receive the second signal from the second terminal device; the processing module 1401 is further configured to control the transceiver module 1402 to respond to the resource request to the first terminal device Send a resource response.
  • the communication apparatus 1400 is a group head terminal device or a network device.
  • the resource request includes the data amount of the first data in the first signal, and/or the data amount of the second data in the second signal.
  • the resource request includes the type of the first signal and/or the feedback type of the second signal.
  • the communication device 1400 includes pre-configuration information, the pre-configuration information includes a plurality of index information, and each index information corresponds to a preset resource; the resource request includes first index information, the first index information is one of multiple index information, and the first resource is a preset resource corresponding to the first index information.
  • the pre-configuration information further includes multiple types, and each type corresponds to at least one index information;
  • the resource request further includes the type of the first signal, and the type of the first signal is one of the multiple types,
  • the first index information is one of at least one index information corresponding to the type of the first signal.
  • the resource request further includes feedback information of the second signal
  • the feedback information of the second signal includes a feedback type of the second signal and a feedback element corresponding to the feedback type of the second signal.
  • the resource request further includes feedback time information, where the feedback time information is used to indicate time domain resources and/or periodic resources that bear the second signal.
  • the processing module 1401 is specifically configured to generate a resource response according to the resource request, where the resource response includes first indication information and second indication information, and the first indication information indicates the resource for the first terminal device to send the first signal. , and the second indication information indicates the resources for the first terminal device to receive the second signal; the transceiver module 1402 is controlled to send a resource response to the first terminal device.
  • the feedback type includes at least one or more of channel state type, positioning information type, auxiliary information type, and power control type; wherein, the feedback element corresponding to the channel state type at least includes CQI, RI, One or more of PMI; the feedback element corresponding to the positioning information type includes at least one or more of RTT, AOA, and AoD; the feedback element corresponding to the auxiliary information type includes at least one of resource identifier, RSRP, SINR or Multiple items; the feedback element corresponding to the power control type includes at least signal power and/or interference power.
  • FIG. 15 shows an apparatus 1500 provided in this embodiment of the present application.
  • the apparatus shown in FIG. 15 may be a hardware circuit implementation of the apparatus shown in FIG. 14 .
  • the apparatus can be applied to the flow chart shown above to perform the functions of the first terminal device or the second terminal device in the above method embodiments.
  • FIG. 15 shows only the main components of the device.
  • the apparatus 1500 shown in FIG. 15 includes a communication interface 1510, a processor 1520, and a memory 1530, wherein the memory 1530 is used to store program instructions and/or data.
  • Processor 1520 may cooperate with memory 1530.
  • Processor 1520 may execute program instructions stored in memory 1530 .
  • the processor 1520 is configured to perform the operations performed by the processing module 1401 in the above embodiments
  • the communication interface 1510 is configured to perform operations performed by the transceiver module 1402 in the above embodiments.
  • Memory 1530 and processor 1520 are coupled.
  • the coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units or modules, which may be in electrical, mechanical or other forms, and is used for information exchange between devices, units or modules.
  • At least one of the memories 1530 may be included in the processor 1520 .
  • the communication interface may be a transceiver, a circuit, a bus, a module, or other types of communication interfaces.
  • the transceiver when the communication interface is a transceiver, the transceiver may include an independent receiver and an independent transmitter; it may also be a transceiver integrating a transceiver function, or a communication interface.
  • the apparatus 1500 may also include a communication line 1540 .
  • the communication interface 1510, the processor 1520 and the memory 1530 may be connected to each other through a communication line 1540; the communication line 1540 may be a peripheral component interconnect (PCI for short) bus or an extended industry standard architecture (extended industry standard architecture). , referred to as EISA) bus and so on.
  • the communication line 1540 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in FIG. 15, but it does not mean that there is only one bus or one type of bus.
  • an embodiment of the present application provides a chip system, including: a processor, the processor is coupled with a memory, the memory is used to store a program or an instruction, when the program or instruction is processed by the When the controller is executed, the chip system is made to implement any one of the above method embodiments.
  • the chip system further includes an interface circuit, and the interface circuit is used to exchange code instructions to the processor.
  • processors in the chip system, and the processors may be implemented by hardware or software.
  • the processor may be a logic circuit, an integrated circuit, or the like.
  • the processor may be a general-purpose processor implemented by reading software codes stored in memory.
  • the memory can be integrated with the processor, or can be provided separately from the processor.
  • the memory may be a non-transitory processor, such as a read-only memory ROM, which may be integrated with the processor on the same chip, or may be provided on different chips.
  • the embodiments of the present application provide a computer-readable storage medium on which a computer program or instruction is stored, and when the computer program or instruction is executed, causes the computer to execute any one of the foregoing method embodiments. Methods.
  • an embodiment of the present application provides a computer program product, which, when a computer reads and executes the computer program product, causes the computer to execute any one of the above method embodiments.
  • an embodiment of the present application provides a communication system, where the communication system includes the first terminal device, the second terminal device, and the first apparatus in the above method embodiments.

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Abstract

一种资源分配方法及装置，用于在第一终端设备和第二终端设备之间交互信息/信号的场景下，减低信令开销和通信时延。在本申请中，第一终端设备向第一装置发送资源请求，资源请求用于请求第一资源和第二资源，第一资源用于第一终端设备向第二终端设备发送第一信号，第二资源用于第一终端设备从第二终端设备接收第二信号；第一终端设备接收第一装置响应于资源请求的资源响应。

Description

一种资源分配方法及装置
相关申请的交叉引用
本申请要求在2020年12月08日提交中国专利局、申请号为202011444502.5、申请名称为“一种提供辅助信息的方法及UE”的中国专利申请的优先权，其全部内容通过引用结合在本申请中；本申请要求在2021年02月02日提交中国专利局、申请号为202110141112.9、申请名称为“一种资源分配方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种资源分配方法及装置。
背景技术
侧行链路(Sidelink，SL)通信技术是蜂窝物联网技术的一个重要分支，是一种终端设备与终端设备之间直连的通信技术，又称物物通信技术(device to device communication，D2D)。该通信技术为物联应用创造了广阔的应用前景，例如，车联网通信(vehicle-to-everything，V2X)是基于侧行链路的架构进行的场景扩展和技术演进。
侧行链路占用的频谱资源可分为两类：授权频谱(license spectrum)和非授权频谱(unlicense spectrum)。其中，授权频谱受到严格的限制和保护，两个终端设备在授权频谱上通信时，需要依赖于网络设备的资源调度。而非授权频谱是开放的，可以加以利用来提升性能和速率，在此基础上，可以由组头(group header，GH)终端设备和组员(group member，GM)终端设备组成终端设备组，组头终端设备的作用类似于网络设备，可以调度资源以用于组内任两个组员终端设备之间通信。
无论是授权频谱还是非授权频谱，当第一终端设备需要向第二终端设备发送信息时，需要先向网络设备或组头终端设备请求资源，然后在请求到的资源上发送信息。若此时第二终端设备还需要向第一终端设备反馈信息，则第二终端设备也需要向网络设备或组头终端设备请求资源，并在请求到的资源上反馈信息。也即，若两个终端设备之间交互信息，每个终端设备在向对端发送信息之前，都需要请求资源，增大了信令开销和时延。
发明内容
本申请提供一种资源分配方法及装置，用于在第一终端设备和第二终端设备之间交互信息/信号的场景下，减低信令开销和通信时延。
第一方面，本申请提供一种资源分配方法，该方法包括：第一终端设备向第一装置发送资源请求，资源请求用于请求第一资源和第二资源，第一资源用于第一终端设备向第二终端设备发送第一信号，第二资源用于第一终端设备从第二终端设备接收第二信号；第一终端设备接收第一装置响应于资源请求的资源响应。
如此，第一终端设备在向第二终端设备发送第一信号之前，向第一装置请求用于第一终端设备发送第一信号的第一资源，以及请求用于第二终端设备发送第二信号的第二资源， 从而第二终端设备在向第一终端设备发送第二信号时，无需再次向第一装置请求资源，而可以使用第一终端设备为第二终端设备请求的第二资源，有助于降低第二终端设备与第一装置之间的信令开销，而且降低第一终端设备和第二终端设备之间交互的通信时延。
结合第一方面，在第一方面的第一种可选实现方式中，第一装置可以是组头终端设备，示例性的，组头终端设备、第一终端设备和第二终端设备三者可以组成终端设备组，组头终端设备可以为终端设备组内的其他组员终端设备进行非授权频谱资源的调度，有助于实现资源调度的灵活性，且有助于提升通信系统的性能和传输速率。
结合第一方面，在第一方面的第二种可选实现方式中，第一装置可以是网络设备，第一终端设备和第二终端设备在网络设备服务的小区中，网络设备可以为第一终端设备和第二终端设备调度二者之间通信的资源。该实现方式可以适用于V2X模式1(mode-1)场景中。
结合第一方面或第一方面的第一种可选实现方式或第一方面的第二种可选实现方式，在第一方面的第三种可选实现方式中，资源请求包括第一信号中第一数据的数据量，和/或，第二信号中第二数据的数据量。如此，第一装置可以直接根据资源请求中第一数据的数据量，确定为第一终端设备分配的资源量，以及根据资源请求中第二数据的数据量，确定为第二终端设备分配的资源量，有助于提高资源分配的准确性。
结合第一方面或第一方面的第一种可选实现方式至第一方面的第三种可选实现方式中的任一种可选实现方式，在第一方面的第四种可选实现方式中，资源请求中包括第一信号的类型，和/或，第二信号的反馈类型。如此，第一装置在接收到来自多个终端设备的资源请求时，可以基于各终端设备的资源请求中第一信号的类型和/或第二信号的反馈类型，确定如何为多个终端设备分配资源。
结合第一方面或第一方面的第一种可选实现方式或第一方面的第二种可选实现方式中的任一种可选实现方式，在第一方面的第五种可选实现方式中，第一终端设备包括有预配置信息，预配置信息包括多个索引信息，每个索引信息对应有一个预设资源；资源请求中包括第一索引信息，第一索引信息是多个索引信息中的一个，第一资源是第一索引信息对应的预设资源。如此，第一装置可以根据资源请求中包括的第一索引信息以及预配置信息中的对应关系，确定为第一终端设备分配的资源，第一索引信息占用的比特较少，有助于减少第一终端设备发送资源请求时的信令开销。而且，该方式可以适用于第一终端设备向第一装置请求发送参考信号的资源的实现方式，第一终端设备可以确定发送参考信号所需资源对应的索引，从而第一装置分配用于第一终端设备发送参考信号的资源。
结合第一方面的第五种可选实现方式，在第一方面的第六种可选实现方式中，预配置信息还包括多个类型，每个类型对应有至少一个索引信息；资源请求中还包括第一信号的类型，第一信号的类型是多个类型中一个，第一索引信息是第一信号的类型对应的至少一个索引信息中一个。如此，通过两个维度(即类型和索引)来指示第一资源，可以进一步减少第一终端设备发送资源请求时的信令开销。
结合第一方面的第五种可选实现方式或第一方面的第六种可选实现方式，在第一方面的第七种可选实现方式中，资源请求中还包括第二信号的反馈信息，第二信号的反馈信息包括第二信号的反馈类型和第二信号的反馈类型对应的反馈元素。如此，第一装置可以根据第二信号的反馈信息和第二信号的反馈类型对应的反馈元素，预测第二信号中数据的数据量，进而根据第二信号中数据的数据量确定为第二终端设备分配资源的资源量，有助于 提高资源分配的准确性。
结合第一方面或第一方面的第一种可选实现方式至第一方面的第七种可选实现方式中的任一种可选实现方式，在第一方面的第八种可选实现方式中，资源请求还包括反馈时间信息，反馈时间信息用于指示承载第二信号的时域资源和/或周期资源。如此，第一装置为第二终端设备分配的时域资源和/或周期资源，可以满足第一终端设备期望第二终端设备反馈第二信号的需求，有助于提高第一终端设备和第二终端设备之间通信的可靠性。
结合第一方面或第一方面的第一种可选实现方式至第一方面的第八种可选实现方式中的任一种可选实现方式，在第一方面的第九种可选实现方式中，所述方法还包括：第一终端设备向第二终端设备发送控制信息，其中，控制信息中包括第一终端设备从资源响应中得到的第一指示信息和/或第二指示信息，第一指示信息指示第一终端设备发送第一信号的资源，第二指示信息指示第一终端设备接收第二信号的资源。如此，第一终端设备可以指示给第二终端设备第一终端设备发送第一信号的资源，有助于第二终端设备准确接收到第一信号。第一终端设备还可以指示给第二终端设备第二终端设备发送第二信号的资源，从而第二终端设备可以在对应资源上发送第二信号，实现第二终端设备无需向第一装置请求资源，有助于降低第二终端设备与第一装置之间的信令开销，而且可以降低第一终端设备和第二终端设备之间交互信号的通信时延，进一步的，第二终端设备无需再向第一终端设备指示第二终端设备发送第二信号的资源，有助于减少第一终端设备和第二终端设备之间的信令开销，且第一终端设备无需盲检来自第二终端设备的控制信息，降低第一终端设备的功耗。
结合第一方面的第九种可选实现方式，在第一方面的第十种可选实现方式中，控制信息中还包括预设反馈类型，第二信号的反馈类型与控制信息中预设反馈类型相同。如此，第一终端设备可以指示第二终端设备反馈第二信号的反馈类型，有助于提高第一终端设备和第二终端设备之间通信的可靠性。
结合第一方面或第一方面的第一种可选实现方式至第一方面的第十种可选实现方式中的任一种可选实现方式，在第一方面的第十一种可选实现方式中，所述方法还包括：第一终端设备根据资源响应中第一指示信息，向第二终端设备发送第一信号，和/或，第一终端设备根据资源响应中第二指示信息，接收来自第二终端设备的第二信号。如此，第一终端设备基于第一指示信息向第二终端设备发送第一信号，第二终端设备基于第一指示信息接收来自第一终端设备的第一信号，同样的，第二终端设备基于第二指示信息向第一终端设备发送第二信号，第一终端设备基于第二指示信息接收来自第二终端设备的第二信号，可以提高二者之间通信的可靠性。
结合第一方面或第一方面的第一种可选实现方式至第一方面的第十一种可选实现方式中的任一种可选实现方式，在第一方面的第十二种可选实现方式中，第一终端设备向第二终端设备发送第一信号，该第一信号可以触发第二终端设备向第一终端设备发送第二信号。该实现方式可以适用于比如信道状态信息(channel state information，CSI)测量场景、定位测量场景、辅助信息反馈场景、功率控制信息反馈场景、数据交互场景等。
结合第一方面或第一方面的第一种可选实现方式至第一方面的第十二种可选实现方式中的任一种可选实现方式，在第一方面的第十三种可选实现方式中，反馈类型至少包括信道状态类型、定位信息类型、辅助信息类型、功率控制类型中的一项或多项；其中，信道状态类型对应的反馈元素至少包括预编码矩阵指示(precoding matrix indicator，PMI)、 信道质量指示(channel quality indicator，CQI)、秩指示(rank indicator，RI)中的一项或多项；定位信息类型对应的反馈元素至少包括往返时间(round trip time，RTT)、到达角(angle of arrival，AoA)、离开角(angle of departure，AoD)中的一项或多项；辅助信息类型对应的反馈元素至少包括资源标识(resource ID)、参考信号接收功率(reference signal received power，RSRP)、信号与干扰加噪声比(signal to interference and noise ratio，SINR)中的一项或多项；功率控制类型对应的反馈元素至少包括信号功率和/或干扰功率。
第二方面，本申请提供一种资源分配方法，该方法包括：第一装置接收来自第一终端设备的资源请求，资源请求用于请求第一资源和第二资源，第一资源用于第一终端设备向第二终端设备发送第一信号，第二资源用于第一终端设备从第二终端设备接收第二信号；第一装置响应于资源请求，向第一终端设备发送资源响应。
结合第二方面，该方法中包括上述第一方面的第一种可选实现方式至上述第一方面的第十三种可选实现方式中的任一种可选实现方式。
第三方面，本申请实施例提供一种通信装置，该装置具有实现上述第一方面或第一方面的任一种可选实现方式中第一终端设备的功能，该装置可以为终端设备，也可以为终端设备中包括的芯片。
该通信装置也可以具有实现上述第二方面或第二方面的任一种可选实现方式中第一装置的功能，该装置可以为网络设备，也可以为网络设备中包括的芯片，或者，该装置可以为终端设备，也可以为终端设备中包括的芯片。
上述通信装置的功能可以通过硬件实现，也可以通过硬件执行相应的软件实现，所述硬件或软件包括一个或多个与上述功能相对应的模块或单元或手段(means)。
在一种可选实现方式中，该装置的结构中包括处理模块和收发模块，其中，处理模块被配置为支持该装置执行上述第一方面或第一方面的任一种实现方式中第一终端设备相应的功能，或者执行上述第二方面或第二方面的任一种实现方式中第一装置相应的功能。收发模块用于支持该装置与其他通信设备之间的通信，例如该装置为第一终端设备时，可向第一装置发送资源请求。该通信装置还可以包括存储模块，存储模块与处理模块耦合，其保存有装置必要的程序指令和数据。作为一种示例，处理模块可以为处理器，通信模块可以为收发器，存储模块可以为存储器，存储器可以和处理器集成在一起，也可以和处理器分离设置。
在另一种可选实现方式中，该装置的结构中包括处理器，还可以包括存储器。处理器与存储器耦合，可用于执行存储器中存储的计算机程序指令，以使装置执行上述第一方面或第一方面的任一种可选实现方式中的方法，或者执行上述第二方面或第二方面的任一种可选实现方式中的方法。可选地，该装置还包括通信接口，处理器与通信接口耦合。当装置为网络设备或终端设备时，该通信接口可以是收发器或输入/输出接口；当该装置为网络设备中包含的芯片或终端设备中包含的芯片时，该通信接口可以是芯片的输入/输出接口。可选地，收发器可以为收发电路，输入/输出接口可以是输入/输出电路。
第四方面，本申请实施例提供一种芯片系统，包括：处理器，所述处理器与存储器耦合，所述存储器用于存储程序或指令，当所述程序或指令被所述处理器执行时，使得该芯 片系统实现上述第一方面或第一方面的任一种可选实现方式中的方法，或实现上述第二方面或第二方面的任一种可选实现方式中的方法。
可选地，该芯片系统还包括接口电路，该接口电路用于交互代码指令至所述处理器。
可选地，该芯片系统中的处理器可以为一个或多个，该处理器可以通过硬件实现也可以通过软件实现。当通过硬件实现时，该处理器可以是逻辑电路、集成电路等。当通过软件实现时，该处理器可以是一个通用处理器，通过读取存储器中存储的软件代码来实现。
可选地，该芯片系统中的存储器也可以为一个或多个。该存储器可以与处理器集成在一起，也可以和处理器分离设置。示例性的，存储器可以是非瞬时性处理器，例如只读存储器ROM，其可以与处理器集成在同一块芯片上，也可以分别设置在不同的芯片上。
第五方面，本申请实施例提供一种计算机可读存储介质，其上存储有计算机程序或指令，当该计算机程序或指令被执行时，使得计算机执行上述第一方面或第一方面的任一种可选实现方式中的方法，或执行上述第二方面或第二方面的任一种可选实现方式中的方法。
第六方面，本申请实施例提供一种计算机程序产品，当计算机读取并执行所述计算机程序产品时，使得计算机执行上述第一方面或第一方面的任一种可选实现方式中的方法，或执行上述第二方面或第二方面的任一种可选实现方式中的方法。
第七方面，本申请实施例提供一种通信系统，该通信系统包括第一终端设备、第二终端设备和第一装置，其中第一终端设备用于执行上述第一方面或第一方面的任一种可选实现方式中的方法，第一装置用于执行上述第二方面或第二方面的任一种可选实现方式中的方法。
上述第二方面至第七方面中任一方面可以达到的技术效果可以参照上述第一方面或第一方面的任一种可选实现方式中有益效果的描述，此处不再重复赘述。
附图说明
图1为本申请提供的一种通信系统架构示意图；
图2为本申请提供的一种信息传输方法的流程示意图；
图3为本申请提供的另一种通信系统架构示意图；
图4为本申请提供的另一种信息传输方法的流程示意图；
图5为本申请提供的一组V2X场景的示意图；
图6为本申请提供的一种家庭场景的示意图；
图7为本申请提供的一种资源分配方法的流程示意图；
图8为本申请提供的一种资源请求所包含字段的示意图；
图9为本申请提供的另一种资源请求所包含字段的示意图；
图10为本申请提供的一种第一终端设备与第二终端设备交互信号的流程示意图；
图11为本申请提供的另一种第一终端设备与第二终端设备交互信号的流程示意图；
图12为本申请提供的一种资源分配的示意图；
图13为本申请提供的另一种资源分配的示意图；
图14为本申请提供的一种通信装置的结构示意图；
图15为本申请提供的另一种通信装置的结构示意图。
具体实施方式
为了使本申请实施例的目的、技术方案和优点更加清楚，下面将结合附图对本申请实施例作进一步地详细描述。
以下，对本申请实施例中的部分用语进行解释说明，以便于本领域技术人员理解。
一、终端设备，终端设备是一种具有无线收发功能的设备，可以是固定设备，移动设备、手持设备(例如手机)、穿戴设备、车载设备，或内置于上述设备中的无线装置(例如，通信模块，调制解调器，或芯片系统等)。所述终端设备用于连接人，物，机器等，可广泛用于各种场景，例如包括但不限于以下场景：蜂窝通信、设备到设备通信(device-to-device，D2D)、车到一切(vehicle to everything，V2X)、机器到机器/机器类通信(machine-to-machine/machine-type communications，M2M/MTC)、物联网(internet of things，IoT)、虚拟现实(virtual reality，VR)、增强现实(augmented reality，AR)、工业控制(industrial control)、无人驾驶(self driving)、远程医疗(remote medical)、智能电网(smart grid)、智能家具、智能办公、智能穿戴、智能交通，智慧城市(smart city)、无人机、机器人等场景的终端设备。所述终端设备有时可称为用户设备(user equipment，UE)、终端、接入站、UE站、远方站、无线通信设备、或用户装置等等。
二、网络设备，例如包括接入网(access network，AN)设备，例如基站(例如，接入点)，可以是指接入网中在空口通过一个或多个小区与终端设备通信的设备，或者例如，一种V2X技术中的网络设备为路侧单元(road side unit，RSU)。基站可用于将收到的空中帧与网际协议(IP)分组进行相互转换，作为终端设备与接入网的其余部分之间的路由器，其中接入网的其余部分可包括IP网络。RSU可以是支持V2X应用的固定基础设施实体，可以与支持V2X应用的其他实体交换消息。网络设备还可协调对空口的属性管理。例如，网络设备可以包括LTE系统或高级长期演进(long term evolution-advanced，LTE-A)中的演进型基站(NodeB或eNB或e-NodeB，evolutional Node B)，或者也可以包括5G NR系统中的下一代节点B(next generation node B，gNB)或者也可以包括云接入网(cloud radio access network，Cloud RAN)系统中的集中式单元(centralized unit，CU)和分布式单元(distributed unit，DU)，本申请实施例并不限定。
三、终端设备组，由多个终端设备组成的终端设备组，该终端设备组中任两个终端设备可以通过侧行链路交互侧行信息。该终端设备组中包括有组头终端设备和组员终端设备，组头终端设备给组内组员终端设备发送同步信号块(synchronization signal block，SSB)时，可以通过降低发送功率来节能，组员终端设备可以只监听组头终端设备的SSB来保持同步，不用接收组外其他同步信息，从而保持独一性和节能。
进一步的，采用终端设备组方式具有如下效果：
1、各终端设备组对应有各自的资源池，终端设备组中组头终端设备可以统一对资源池中资源分配，有助于提高资源分配效率。
2、终端设备组中组头终端设备可以测量组内各组员终端设备的信道信息、业务负载(load)等，有助于更好的控制组内的侧行链路。
3、在高负载(heavy traffic load)场景或用户数较多场景中，如果终端设备全部自主竞争资源，则产生资源冲突碰撞的概率很高，而终端设备组中由组头终端设备来统筹资源分配，有助于避免发生资源碰撞事件。
4、在基站调度资源情况下，基站为各终端设备组分配好各自的资源池，各终端设备 组中组头终端设备可以统一对资源池中资源分配，组员终端设备无需再向基站请求资源，降低空口时延。
四、V2X，具体又包括车辆间的通信、车辆与人(包括行人、骑自行车的人、司机、或乘客)的通信、车辆与网络设备的通信。
在V2X的通信过程中，作为发送端的终端设备(也称为发送终端设备)向作为接收端的终端设备(也称为接收终端设备)发送侧行信息，接收终端设备接收和译码该侧行信息。在V2X中，发送终端设备存在两种资源分配模式，其中的一种资源分配模式为模式1(mode-1)，在mode-1下由基站为发送终端设备分配资源；另一种资源分配模式为mode-2，在mode-2下由发送终端设备自行选择或竞争资源。
其中，mode-1(模式1)主要应用于有网络覆盖的情形下的V2X通信，由基站进行资源分配。具体地，mode-1又可以包括动态调度(dynamic grant，DG)模式和预配置调度(configured grant，CG)模式。在mode-1的DG模式下，基站会通过下行控制信息(downlink control information，DCI)调度发送终端设备向接收终端设备发送侧行信息。在mode-1的CG模式下，基站会通过高层信令，例如无线资源控制(radio resource control，RRC)信令，配置相关的侧行时频资源。在mode-2下，发送终端设备对于侧行时频资源的选择不依赖于基站。该模式不受限于网络覆盖，在没有网络覆盖情况下，发送终端设备也可以用该模式进行通信。
五、资源，也可以称为时频资源，包括时域资源和频域资源，其中，频域资源可以是一个或多个资源块(resource block，RB)，或是一个或多个资源单元(resource element，RE)，或是一个或多个载波(carrier)，或是一个或多个带宽部分(bandwidth part，BWP)等。时域资源可以是一个或者多个子帧，或是一个或多个时隙，或是一个或多个时隙上的一个或多个符号等。
六、本申请实施例中的术语“系统”和“网络”可被互换使用。“至少一个”是指一个或者多个，“多个”是指两个或两个以上。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B的情况，其中A，B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。“以下至少一项(个)”或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a，b，或c中的至少一项(个)，可以表示：a，b，c，a-b，a-c，b-c，或a-b-c，其中a，b，c可以是单个，也可以是多个。
本申请提供的方法可以应用于各类通信系统中，例如，可以是长期演进(long term evolution，LTE)系统，也可以是第五代(5G)通信系统，还可以是LTE与5G混合架构、也可以是5G新无线(new radio，NR)系统，以及未来通信发展中出现的新的通信系统等。
如图1为本申请示例性提供的一种通信系统，其中，网络设备和3个终端设备(分别用终端设备1至终端设备3表示)组成一个单小区通信系统，终端设备1至终端设备3可以分别或同时发送上行信息给网络设备，网络设备可以分别或同时发送下行信息给终端设备1至终端设备3，终端设备1至终端设备3之间也可以相互发送侧行信息。
应理解，图1仅是一种示例性说明，并不对通信系统中包括的终端设备、网络设备的数量、网络设备覆盖的小区数量进行具体限定。
该通信系统中，任两个终端设备之间可以传输侧行信息，示例性的，可以将两个终端 设备中用于发送侧行信息的终端设备称为是第一终端设备(或发送终端设备、Tx UE)，将用于接收侧行信息的终端设备称为是第二终端设备(或接收终端设备、Rx UE)。
示例性的，第一终端设备和第二终端设备可以分别是图1中终端设备1至终端设备3中任意两个，比如第一终端设备和第二终端设备可以分别是终端设备1和终端设备3，再比如第一终端设备和第二终端设备可以分别是终端设备1和终端设备2。
第一终端设备和第二终端设备之间传输侧行信息，具体可参见如图2示例性示出的一种信息传输方法的流程示意图，该流程示意图中：
步骤201，第一终端设备向网络设备发送上行调度请求(scheduling request，SR)。相应的，网络设备接收SR，确定用于第一终端设备发送缓冲区状态报告(buffer state report，BSR)的上行资源。
步骤202，网络设备向第一终端设备发送第一DCI。相应的，第一终端设备接收第一DCI，从中确定出用于发送BSR的上行资源。
步骤203，第一终端设备通过该上行资源向网络设备发送BSR，该BSR用于指示第一终端设备向第二终端设备发送侧行信息的数据量。相应的，网络设备通过该上行资源接收BSR，根据该BSR确定用于第一终端设备向第二终端设备发送侧行信息的侧行资源。
步骤204，网络设备向第一终端设备发送第二DCI。相应的，第一终端设备接收第二DCI，从第二DCI中确定出用于向第二终端设备发送侧行信息的侧行资源。
步骤205，第一终端设备通过侧行资源向第二终端设备发送侧行信息。相应的，第二终端设备通过侧行资源接收侧行信息。
其中侧行信息包括侧行控制信息和/或侧行数据信息，第一终端设备向第二终端设备发送侧行信息，又可以理解为，第一终端设备向第二终端设备发送侧行控制信息和/或侧行数据信息，或者理解为，第一终端设备向第二终端设备发送PSCCH(physical sidelink control channel，物理旁路控制信道)和/或PSSCH(physical sidelink share channel，物理旁路共享信道)。相应的，第二终端设备通过侧行资源接收来自第一终端设备的侧行控制信息和/或侧行数据信息，或者通过侧行资源接收来自第一终端设备的PSCCH和/或PSSCH。
步骤206，第二终端设备向第一终端设备发送混合自动重传请求(hybrid automatic repeat request，HARQ)。
如图3为本申请示例性提供的另一种通信系统，其中，组头终端设备(用终端设备0表示)和3个组员终端设备(分别用终端设备1至终端设备3表示)组成终端设备组，其中组头终端设备可以充当部分网络设备的角色，用于管理多个组员终端设备。从产品形态上来看，组头终端设备也是终端设备的一种，只是具备了部分网络设备的功能，比如中心控制、配置资源和接收数据等。终端设备1至终端设备3可以分别或同时发送侧行信息给组头终端设备，组头终端设备可以分别或同时发送侧行信息给终端设备1至终端设备3，终端设备1至终端设备3之间也可以相互发送侧行信息。
应理解，图3仅是一种示例性说明，并不对通信系统中终端设备组的数量，每个终端设备组中包括的组员终端设备、组头终端设备的数量进行具体限定。
该通信系统中，任两个组员终端设备之间可以传输侧行信息，示例性的，可以将两个组员终端设备中用于发送侧行信息的组员终端设备称为是第一终端设备，将用于接收侧行信息的组员终端设备称为是第二终端设备。
示例性的，第一终端设备和第二终端设备可以分别是图3中终端设备1至终端设备3中任意两个，比如第一终端设备和第二终端设备可以分别是终端设备1和终端设备3，再比如第一终端设备和第二终端设备可以分别是终端设备1和终端设备2。
第一终端设备和第二终端设备之间传输侧行信息，具体可参见如图4示例性示出的另一种信息传输方法的流程示意图。该流程中，第一终端设备不再向网络设备请求侧行资源，而是向组头终端设备请求侧行资源，具体的：
步骤401，第一终端设备向组头终端设备发送SR。相应的，组头终端设备接收SR，确定用于第一终端设备发送BSR的第一侧行资源。
步骤402，组头终端设备向第一终端设备发送第一侧行链路控制信息(sidelink control information，SCI)。相应的，第一终端设备接收第一SCI，从中确定出用于发送BSR的第一侧行资源。
步骤403，第一终端设备向组头终端设备发送BSR，该BSR用于指示第一终端设备向第二终端设备发送侧行信息的数据量。相应的，组头终端设备接收BSR，根据该BSR确定用于第一终端设备向第二终端设备发送侧行信息的第二侧行资源。
步骤404，组头终端设备向第一终端设备发送第二SCI。相应的，第一终端设备接收第二SCI，从第二SCI中确定出用于向第二终端设备发送侧行信息的第二侧行资源。
步骤405，第一终端设备通过第二侧行资源向第二终端设备发送侧行信息。相应的，第二终端设备通过第二侧行资源接收侧行信息。
其中侧行信息包括侧行控制信息和/或侧行数据信息，第一终端设备向第二终端设备发送侧行信息，又可以理解为，第一终端设备向第二终端设备发送侧行控制信息和/或侧行数据信息，或者理解为，第一终端设备向第二终端设备发送PSCCH和/或PSSCH。相应的，第二终端设备通过第二侧行资源接收来自第一终端设备的侧行控制信息和/或侧行数据信息，或者通过第二侧行资源接收来自第一终端设备的PSCCH和/或PSSCH。
步骤406，第二终端设备向第一终端设备发送HARQ。
基于上述两种通信系统，如下举例说明本申请实施例可适用的具体场景。
如图5为一组V2X场景的示意图。示例性的，如图5中(a)，车辆A为第一终端设备，车辆B为第二终端设备，车辆A向网络设备(比如RSU)请求侧行资源，车辆A基于请求到的侧行资源向车辆B发送侧行信息，车辆B响应于车辆A的侧行信息，向车辆A发送HARQ。示例性的，如图5中(b)，车辆A、车辆B、车辆C组成终端设备组，车辆A为第一终端设备，车辆B为第二终端设备，车辆C为组头终端设备，车辆A向车辆C请求侧行资源，车辆A基于请求到的侧行资源向车辆B发送侧行信息，车辆B响应于车辆A的侧行信息，向车辆A发送HARQ。
如图6为一种家庭场景的示意图，示例性的，用户需要将平板上的视频数据投影至电视上，该场景中，手机、电视、平板组成终端设备组，平板为第一终端设备，电视为第二终端设备，手机为组头终端设备，平板向手机请求侧行资源，基于该侧行资源向电视发送侧行信息(即视频数据)，电视响应于平板的侧行信息，向平板发送HARQ。
上述过程中，第一终端设备基于网络设备或组头终端设备的调度，向第二终端设备发送侧行信息，第二终端设备响应于该侧行信息，向第一终端设备发送HARQ。其中HARQ 的数据量较小，第二终端设备在发送HARQ时可以将HARQ承载于物理侧行链路反馈信道(physical sidelink feedback channel，PSFCH)中。
PSFCH占用第一终端设备请求的侧行资源。也可以理解，第一终端设备在请求侧行资源时，由于HARQ的数据量较少，则可以直接请求包括有用于第二终端设备反馈HARQ的侧行资源，从而实现第二终端设备反馈HARQ。
但是，在第二终端设备需要向第一终端设备反馈除HARQ以外的其他信息的情况下，该其他信息的数据量较大，第二终端设备还需要进一步向网络设备或组头终端设备请求侧行资源，也即，第二终端设备同样也需要先经过上述步骤201至步骤204或者上述步骤401至步骤404。在该场景中，第一终端设备和第二终端设备在发送各自的侧行信息之前都需要向网络设备或组头终端设备请求侧行资源，增加了整个交互过程的时长。
此外，第一终端设备不仅可以向第二终端设备发送侧行控制信息和/或侧行数据信息，也可以向第二终端设备发送参考信号，参考信号比如定位测量参考信号、信道状态信息参考信号(channel state information-reference signal，CSI-RS)等，可以将第一终端设备向第二终端设备发送的侧行控制信息、侧行数据信息和参考信号均称为第一信号。相应的，第二终端设备也可以向第一终端设备发送第二信号，其中第二信号可以是侧行控制信息，或侧行数据信息，或参考信号。
进一步的，第一终端设备和第二终端设备之间相互发送信号的场景可以称为是链路环(link loop)场景。link loop场景可以有两种情况：
情况一：第一信号与第二信号相关，第一终端设备向第二终端设备发送第一信号，第二终端设备可以根据接收到的第一信号确定第二信号，然后向第一终端设备发送第二信号。
可以至少有如下示例：
示例1，信道状态信息测量场景。
第一终端设备发送CSI-RS(即第一信号)，第二终端设备测量CSI-RS得到信道状态信息，并向第一终端设备发送该信道状态信息(即第二信号)。
其中信道状态信息用于指示第一终端设备和第二终端设备之间的信道状态，信道状态信息比如3I信息，3I信息具体包括PMI、CQI、RI。
本示例中，第二终端设备可以在检测到第一终端设备的CSI-RS之后测量该CSI-RS，即第二终端设备的测量是基于第一终端设备发送的CSI-RS触发的。
此外，第二终端设备的测量还可以是基于第一终端设备发送的侧行信息触发的，第二终端设备在接收到第一终端设备发送的侧行信息之后，测量第一终端设备发送的CSI-RS，得到信道状态信息。也即，在该link loop场景中，第一终端设备向第二终端设备发送侧行信息，第二终端设备向第一终端设备发送信道状态信息。第二终端设备测量第一终端设备的CSI-RS得到信道状态信息，向第一终端设备反馈信道状态信息，相应的，第一终端设备可以基于接收到的信道状态信息确定第一终端设备与第二终端设备之间的信道状态，确定是否继续发送该侧行信息，或者优先发送何种类型的侧行信息。此处，侧行信息具体可以是侧行数据信息，侧行数据信息比如网页数据、视频数据、音频数据等。
需要指出的是，第一终端设备向第二终端设备发送侧行信息，第二终端设备向第一终端设备发送信道状态信息，可以认为第一终端设备向第二终端设备发送的第一信号是侧行信息，此时第一信号和第二信号无关。当然还可以理解为，第一终端设备向第二终端设备发送的第一信号仍是CSI-RS，此时，第一信号和第二信号相关。
示例2，定位测量场景。
第一终端设备发送定位测量参考信号(即第一信号)，第二终端设备测量第一终端设备发送的定位测量参考信号得到定位测量信息，向第一终端设备发送该定位测量信息(即第二信号)。其中定位测量信息如RTT、AoA、AoD等。
本示例中，第二终端设备可以在检测到第一终端设备的定位测量参考信号之后测量定位测量参考信号，即第二终端设备的测量是基于第一终端设备发送的定位测量参考信号触发的。此外，第二终端设备的测量还可以是基于第一终端设备发送的侧行信息触发的，第二终端设备在接收到第一终端设备发送的侧行信息之后，测量第一终端设备发送的定位测量参考信号，得到定位测量信息，具体说明可参见上述示例1，此处不再赘述。
示例3，辅助信息反馈场景。
第一终端设备向第二终端设备发送辅助资源选择请求(即第一信号)，该辅助资源选择请求用于指示第二终端设备辅助第一终端设备在资源池中选择侧行资源。示例性的，该辅助资源选择请求为用于配置/触发第二终端设备反馈的指示消息，该辅助资源选择请求中包括上报时域类型指示、测量集合指示、上报内容类型指示、测量门限、发送机制等。相应的，第二终端设备根据辅助资源选择请求中上报时域类型指示、测量集合指示、上报内容类型指示、测量门限、发送机制等，在资源池中检测得到符合要求的侧行资源，生成辅助资源选择信息(即第二信号)并发送至第一终端设备。
此外，第一信号还可以是零功率参考信号(zero power CSI-RS)，该零功率参考信号用于第二终端设备测量相邻小组或者异系统的干扰情况，相应的，第二终端设备测量零功率参考信号得到相邻小组或者异系统的干扰情况，以生成辅助资源选择信息(即第二信号)。
其中辅助资源选择信息包括资源标识(资源索引)、RSRP、SINR中一项或多项。
示例4，功率控制信息反馈场景。
第一终端设备进入分布式功率控制模式时，第一终端设备向第二终端设备发送功率控制辅助请求(即第一信号)，第二终端设备响应于该功率控制辅助请求，将信号功率、干扰功率等作为功率控制辅助信息(即第二信号)发送至第一终端设备。
情况二：第一信号与第二信号无关，第一终端设备向第二终端设备发送第一信号，第二终端设备确定第二信号，然后向第一终端设备发送第二信号。可以至少有如下示例：
示例5，数据交互场景。
第一终端设备向第二终端设备发送侧行数据信息(即第一信号)，第二终端设备向第一终端设备发送侧行数据信息(即第二信号)。
示例6，信道状态信息测量场景。
第一终端设备向第二终端设备发送侧行数据信息(即第一信号)，第二终端设备测量CSI-RS得到信道状态信息，并向第一终端设备发送该信道状态信息(即第二信号)。具体可参见上述示例1，不再赘述。
示例7，辅助信息反馈场景。
第一终端设备向第二终端设备发送辅助资源选择请求(即第一信号)，该辅助资源选择请求用于指示第二终端设备辅助第一终端设备在资源池中选择侧行资源，示例性的，该辅助资源选择请求为一个触发(trigger)指示，相应的，第二终端设备在接收到辅助资源选择请求之后，在资源池中检测得到符合要求的侧行资源，生成辅助资源选择信息(即第 二信号)并发送至第一终端设备。
需要说明的是，信道状态信息测量场景、定位测量场景、辅助信息反馈场景、功率控制信息反馈场景中，均可能存在第一信号和第二信号无关，如上述示例6和示例7。当然也可能存在其他示例中第一信号和第二信号无关，本申请不再一一举例。
基于此，在link loop场景中，为了降低通信时延，本申请提供一种资源分配方法，该资源分配方法由第一装置、第一终端设备、第二终端设备实现。
该资源分配方法可以应用于上述图1或图3的架构中，示例性的，第一装置、第一终端设备、第二终端设备可以分别是如图1中的网络设备、终端设备1和终端设备2。或者，第一装置、第一终端设备、第二终端设备可以分别是如图3中的终端设备0(组头终端设备)、终端设备1和终端设备2。
在资源分配过程中，第一终端设备向第一装置同时请求第一终端设备向第二终端设备发送第一信号的资源(称为发送资源，或第一资源)和第一终端设备从第二终端设备处接收第二信号的资源(称为接收资源，或第二资源)。
也即，第一资源用于第一终端设备向第二终端设备发送第一信号，第二资源用于第一终端设备从第二终端设备接收第二信号。进一步的，第一终端设备将为第二终端设备请求到的资源指示给第二终端设备，从而第二终端设备无需再向第一装置请求资源，就可以向第一终端设备发送第二信号，有助于降低通信时延。
预先说明的是，第一终端设备从第二终端设备处接收第二信号的资源也可以理解为第二终端设备向第一终端设备发送第二信号的资源，同理，第二终端设备从第一终端设备处接收第一信号的资源也可以理解为第一终端设备向第二终端设备发送第一信号的资源。
如图7为本申请示例性提供的一种资源分配方法的流程示意图，如图7中：
步骤701，第一终端设备向第一装置发送资源请求，其中资源请求用于请求第一资源和第二资源，第一资源用于第一终端设备向第二终端设备发送第一信号，第二资源用于第二终端设备向第一终端设备发送第一信号。
可选的，资源请求包括第一请求信息和第二请求信息，第一请求信息用于指示第一终端设备为第一终端设备请求的第一资源，第二请求信息用于指示第一终端设备为第二终端设备请求的第二资源。
一种可选实现方式中，第一终端设备可以基于待发送的第一信号，确定第一请求信息。第一终端设备可以基于待发送的第一信号确定(或预测)待接收的第二信号，进而根据第二信号确定第二请求信息。
一种可选实现方式中，第一终端设备可以根据第一信号的类型和/或第一信号中数据的数据量，确定第一请求信息。
示例性的，第一信号是参考信号(称为第一参考信号)，第一终端设备根据第一参考信号的类型，确定第一请求信息。比如第一参考信号是CSI-RS，第一终端设备可以将CSI-RS对应的类型包含于第一请求信息中，以指示第一装置为第一终端设备分配用于发送CSI-RS的侧行资源。
示例性的，第一信号具体为侧行数据信息(称为第一数据)，第一终端设备根据第一数据的数据量，确定第一请求信息。比如，第一数据的数据量是100bit，则第一终端设备可将100bit的指示信息包含于第一请求信息中，以指示第一装置为第一终端设备分配用于 发送100bit数据量的侧行资源。
在第一终端设备基于待发送的第一信号确定待接收的第二信号的实现方式中，至少可以由如下示例：(1)第一信号是CSI-RS，或第一信号中承载第一数据，第一终端设备可以确定第二信号是信道状态信息。(2)第一信号是定位测量参考信号，或第一信号中承载第一数据，第一终端设备可以确定第二信号中承载定位测量信息。(3)第一信号中承载辅助资源选择请求，第一终端设备可以确定第二信号中承载辅助资源选择信息。(4)第一信号中承载功率控制辅助请求，第一终端设备可以确定第二信号中承载功率控制辅助信息。(5)第一信号用于触发第二终端设备向第一终端设备发送定位测量参考信号或CSI-RS，第一终端设备可以确定第二信号是定位测量参考信号或CSI-RS。
示例性的，第二信号可以是参考信号(称为第二参考信号)，第一终端设备可以基于待发送的第一信号确定待接收的第二参考信号的反馈类型。比如第一终端设备向第二终端设备发送的第一信号用于触发第二终端设备向第一终端设备发送定位测量参考信号，则第一终端设备可以确定第二参考信号的反馈类型与定位测量参考信号对应。
示例性的，第二信号可以是侧行数据信息(称为第二数据)，第一终端设备可以基于待发送的第一信号确定待接收的第二数据的反馈类型。比如，第一信号是CSI-RS，第一终端设备可以确定第二数据是信道状态信息，进一步确定信道状态信息对应的反馈类型。
示例性的，第二信号可以是第二数据，第一终端设备可以基于待发送的第一信号确定待接收的第二数据的数据量。比如，第一信号是CSI-RS，第一终端设备可以确定第二数据是信道状态信息，进一步确定信道状态信息对应的数据量。
同样的，第一终端设备可以根据第二信号的反馈类型和/或第二信号中数据的数据量，确定第二请求信息，具体可参见第一终端设备根据第一信号的类型和/或第一信号中数据的数据量，确定第一请求信息的实现方式。
进一步的，本申请实施例中，基于第一请求信息和/或第二请求信息中包含字段的不同，本申请实施例可以有如下实现方式一和实现方式二。
实现方式一：
资源请求包括第一请求信息和第二请求信息，其中第一请求信息中包括第一数据的数据量，第二请求信息中包括第二数据的数据量。第一数据的数据量和第二数据的数据量用于指示第一终端设备向第一装置请求的第一资源的资源量和第二资源的资源量。示例性的，可以将第一数据的数据量、第二数据的数据量均承载于数据信道中。
进一步的，第一请求信息中还可以包括第一数据的业务类型，第一数据的业务类型可以用于指示第一数据的优先级，第一装置在为多个终端设备分配资源时可以基于各数据的优先级，确定为各终端设备分配的资源。
示例性的，第一数据比如视频数据、语音数据和网页数据，相应的，第一数据的业务类型比如视频、语音和网页，不同业务类型的优先级由高到低依次为：视频、语音和网页。
示例性的，可以将第一数据的业务类型承载于控制信道中。
第二请求信息中还可以包括第二数据的反馈类型，第二数据比如定位测量信息、信道状态信息、语音数据和网页数据等，相应的，第二数据的反馈类型比如定位信息类型、信道状态类型、语音和网页等。第二数据的反馈类型也可以用于指示第二数据的优先级。
示例性的，可以将第二数据的反馈类型承载于控制信道中。
此外，第二请求信息中还可以包括反馈时间信息，反馈时间信息用于指示第二资源中的时域资源和周期资源。一种具体实现中，反馈时间信息可以是第一终端设备期望第二终端设备反馈第二数据的最晚时间，第一装置可以根据该反馈时间信息确定相应的时域资源和周期资源。示例性的，可以将反馈时间信息承载于控制信道中。
此外，资源请求中还包括链路标识信息，链路标识信息包括第一终端设备的标识信息(称为第一标识信息)和第二终端设备的标识信息(称为第二标识信息)，以指示给第一装置该资源请求是为了给第一终端设备和第二终端设备之间交互信号而请求资源的。示例性的，可以将第一标识信息和第二标识信息均承载于控制信道或均承载于数据信道中。
此外，为了保障信息安全性，还可以将第一标识信息分为在物理层L1的标识信息和在数据链路层L2的标识信息，以及将第二标识信息分为在物理层L1的标识信息和在数据链路层L2的标识信息，将第一终端设备在物理层L1的标识信息和第二终端设备在物理层L1的标识信息(统称为第三标识信息)共同承载于控制信道中，将第一终端设备在数据链路层L2的标识信息和第二终端设备在数据链路层L2的标识信息(统称为第四标识信息)共同承载于数据信道中。
以其中一个终端设备的标识信息为例，该终端设备的标识信息共计有24bit，将其中8bit的标识信息承载于物理层L1中，将其中16bit的标识信息承载于数据链路层L2中。相应的，第一装置需要从物理层L1中解析部分数据，以及从数据链路层L2中解析其余部分数据，才能得到完整的标识信息。
基于上述描述，如图8为本申请示例性提供的一种资源请求所包含字段的示意图，示例性的，第一信号是第一数据，第二信号是第二数据，该资源请求中包括有链路标识信息、第一请求信息、第二请求信息，进一步的，链路标识信息包括第一标识信息和第二标识信息，第一请求信息包括第一数据的数据量(可以表示为BSR_Tx)、第一数据的业务类型(可以表示为Type_Tx/Priority_Tx)，第二请求信息包括第二数据的数据量(可以表示为BSR_Rx)、第二数据的反馈类型(可以表示为Type_Rx)和反馈时间信息(可以表示为TimeOffset_Rx)。
需要说明的是，虽然本申请记载资源请求中包括链路标识信息、第一请求信息和第二请求信息，但也可以理解，资源请求包括第一标识信息、第二标识信息、第一数据的数据量、第一数据的业务类型、第二数据的数据量、第二数据的反馈类型和反馈时间信息中一个或多个。
进一步的，资源请求中各字段可以承载于控制信道或数据信道中，也即第一终端设备可以将资源请求中各字段分为多个信息/消息发送至第一装置中，且不同消息可以承载于不同信道中。一种可选方式中，第一终端设备可以通过数据信道向第一装置发送包括有第一数据的数据量、第二数据的数据量和第四标识信息的数据消息，第一终端设备可以通过控制信道向第一装置发送包括有第一数据的业务类型、第二数据的反馈类型、反馈时间信息和第三标识信息的控制消息。
示例性的，本实现方式可以适用于第一终端设备向第二终端设备发送第一数据，第二终端设备向第一终端设备反馈第二数据的场景中，也即适用于第一终端设备和第二终端设备之间交互业务数据的场景中。
比如图5中(a)所示的V2X场景中，车辆A(即第一终端设备)与车辆B(即第二终端设备)之间进行短距离的数据通信，车辆A可以向网络设备(即第一装置)发送资源 请求，该资源请求中包括第一请求信息和第二请求信息，其中第一请求信息包括车辆A向车辆B发送数据的数据量，第二请求信息包括车辆B向车辆A发送数据的数据量，该资源请求用于指示网络设备分配用于车辆A向车辆B发送数据的资源，以及用于车辆B向车辆A发送数据的资源。
需要指出的是，在一些实施例中可能存在资源请求仅包括第二数据的数据量，也即，资源请求可能不包含第一请求信息，或者包含的第一请求信息中不包括第一数据的数据量。
举例1，第一终端设备向第二终端设备发送CSI-RS(即第一参考信号)，第二终端设备向第一终端设备发送信道状态信息(即第二数据)。第一终端设备向第一装置发送的资源请求中可以包括第二请求信息但不包括第一请求信息，进一步的，第二请求信息中包括信道状态信息的数据量和信道状态信息的反馈类型。其中信道状态信息的数据量和信道状态信息的反馈类型不仅用于指示第一装置为第二终端设备分配用于发送信道状态信息的资源，还可以隐式指示给第一装置该第二终端设备是响应于第一终端设备的CSI-RS而发送信道状态信息的，也即可以向第一装置请求用于第一终端设备发送CSI-RS的资源。
举例2，第一终端设备向第二终端设备发送CSI-RS(即第一参考信号)，第二终端设备向第一终端设备发送信道状态信息(即第二数据)。第一终端设备在向第一装置发送的资源请求中包括第一请求信息和第二请求信息，其中第一请求信息中可以包括CSI-RS的类型，第二请求信息中可以包括信道状态信息的数据量。其中CSI-RS的类型用于指示第一装置为第一终端设备分配用于发送CSI-RS的资源，信道状态信息的数据量用于指示第一装置为第二终端设备分配用于发送信道状态信息的资源。
本申请在一些实施例中还可能存在资源请求仅包括第一数据的数据量，也即，资源请求可能不包含第二请求信息，或者包含的第二请求信息中不包括第二数据的数据量。
举例3，第一终端设备向第二终端设备发送第一视频数据(即第一数据)，第二终端设备向第一终端设备发送第二视频数据(即第二数据)。第一终端设备在向第一装置发送的资源请求中可以包括第一请求信息但不包括第二请求信息，进一步的，第一请求信息中包括第一终端设备向第二终端设备发送第一视频数据的数据量。该第一视频数据的数据量不仅可以用于指示第一装置为第一终端设备分配用于发送第一视频数据的资源，还可以用于指示第一装置为第二终端设备分配用于发送第二视频数据的资源，此处，第一终端设备和第一装置可以均认为第一视频数据的数据量和第二视频数据的数据量相同。
举例4，第一终端设备确定与第二终端设备之间进行通信，第一终端设备请求用于二者之间进行通信的资源池，第一终端设备在向第一装置发送的资源请求中可以包括第一请求信息但不包括第二请求信息，进一步的，第一请求信息中包括用于请求该资源池所对应的数据量或者用于请求该资源池的其他指示信息。
上述仅为示例性举例，本申请的资源请求还可能是其他方式。
实现方式二：
预先说明的是，第一装置可以预先确定n个预设资源，然后根据n个预设资源生成预配置信息，该预配置信息用于指示该n个预设资源，n为正整数。
示例性的，预配置信息中包括多个索引信息，每个索引信息对应有一个预设资源，也即每个索引信息指示一个预设资源。如表1所示为本申请示例性提供的一种预配置信息， 比如索引信息1指示资源1，索引信息2指示资源2。
又或者，该多个预设资源可以是基于预配置信息中的位置来隐式指示，比如位于第1个位置的资源为资源1，位于第2个位置的资源为资源2等。
表1
索引信息 资源
索引信息1 资源1
索引信息2 资源2
索引信息3 资源3
…… ……
索引信息n 资源n
第一装置可以预先将生成的预配置信息发送至第一终端设备，可选的，第一装置是网络设备，网络设备可以将预配置信息通过高层信令(比如RRC、MAC CE)发送至第一终端设备中。可选的，第一装置是组头终端设备，组头终端设备可以将预配置信息通过PC5-RRC发送至第一终端设备中。
相应的，第一终端设备在生成资源请求时，可以根据待发送的第一信号，确定第一终端设备请求的第一资源所对应的索引信息(称为第一索引信息)，然后将第一索引信息包含于第一请求信息中，以用于向第一装置请求该第一索引信息对应的资源。结合表1举例，第一终端设备请求资源2作为第一资源，则可以将索引信息2包含于第一请求信息中。
此外，还可以在预配置信息中增加类型(或称为资源类型(resource type))，具体的，预配置信息包括m个类型，m为正整数。每个类型对应有至少一个索引信息，每个索引信息指示一个预设资源。如表2为本申请示例性提供的另一种预配置信息，比如，类型1包括索引信息1至索引信息3，索引信息1至索引信息3分别指示资源1至资源3。
当然，在该实施例中，多个预设资源也可以是基于预配置信息中的位置来隐式指示，比如位于第1个位置至第3个位置的资源属于类型1，且分别指示资源1至资源3。
表2
Figure PCTCN2021134109-appb-000001
Figure PCTCN2021134109-appb-000002
第一信号的类型(称为第一类型)可以是预配置信息中多个类型中的一个，第一终端设备在生成资源请求时，可以根据第一类型，确定出第一类型对应的至少一个索引信息，然后再从至少一个索引信息中确定第一资源所对应的索引信息(称为第一索引信息)。第一终端设备将第一类型和第一索引信息包含于第一请求信息中，以用于向第一装置请求该第一类型和第一索引信息共同对应的资源(即第一资源)。
结合表2举例，第一终端设备确定用于发送第一信号的第一资源为资源2，则根据表2所示的预配置信息，第一终端设备将包含有类型1和索引信息2的第一请求信息发送至第一装置中。
一种可选实现方式中，第一信号是第一参考信号，第一参考信号的类型(即第一类型)具体可以采用第一参考信号的目的来表征。举例如下：
(1)第一参考信号为CSI-RS，第一类型为信道状态类型A，表征该第一参考信号是第一终端设备用于向第二终端设备请求信道状态信息的。
(2)第一参考信号为定位测量参考信号，第一类型为定位信息类型B，表征该第一参考信号是第一终端设备用于向第二终端设备请求定位测量信息的。
(3)第一参考信号为辅助资源选择请求，第一类型为辅助信息类型C，表征该第一参考信号是第一终端设备用于请求辅助资源选择信息的，该辅助资源选择信息是第二终端设备辅助第一终端设备在资源池中选择侧行资源而得到的。
(4)第一参考信号为功率控制辅助请求，第一类型为功率控制类型D，表征该第一参考信号是第一终端设备用于请求第二终端设备的信号功率、干扰功率等功率控制辅助信息的。
另一种可选实现方式中，第一信号是第一数据，第一数据的类型具体可以是业务类型，举例如下：(5)第一数据为视频数据，第一数据的类型为视频。(6)第一数据为图片数据，第一数据的类型为图片。(7)第一数据为网页数据，第一数据的类型为网页。
本申请中，第二请求信息中也可以包括第二索引信息，或者包括第二信号的反馈类型和第二索引信息，该第二索引信息，或者第二信号的反馈类型和第二索引信息用于指示第一装置为第二终端设备分配发送第二信号的第二资源。
其中第二信号的反馈类型与第一类型可以相关联，示例性的，第一类型为信道状态类型A时，第二数据的反馈类型为信道状态类型a。第一类型为定位信息类型B时，第二数据的反馈类型为定位信息类型b。第一类型为辅助信息类型C时，第二数据的反馈类型为辅助信息类型c。第一类型为功率控制类型D时，第二数据的反馈类型为功率控制类型d。
需要说明的是，第二信号的反馈类型与第一类型相关联的情况下，第二数据的反馈类型与第一类型可以相同，解释为，第一类型和第二数据的反馈类型均为信道状态(3I)类型，或均为定位信息(positioning information)类型，或均为辅助信息(assistant information)类型，或均为功率控制(power control)类型。
第二信号的反馈类型与第一类型可以不关联，示例性的，第一数据的类型为图片，而第二数据的反馈类型为网页，再比如第一数据的类型为视频，而第二数据的反馈类型为信 道状态信息。
示例性的，第一终端设备可以将第一索引信息，或第一类型和第一索引信息承载于控制信道中。第一终端设备还可以将第二索引信息，或第二信号的反馈类型和第二索引信息承载于控制信道中。
此外，本申请提供另一种实现方式，第二请求信息中包括有第二信号的反馈信息，其中第二信号的反馈信息包括第二信号的反馈类型和该反馈类型对应的反馈元素。第二信号的反馈类型可以与第一类型相关或不相关，具体可参见上述描述。
不同反馈类型对应的反馈元素不同，示例性的，信道状态类型对应的反馈元素比如CQI、RI、PMI中一项或多项。定位信息类型对应的反馈元素比如RTT、AoA、AoD中一项或多项。辅助信息类型对应的反馈元素比如资源标识、RSRP、SINR中一项或多项。功率控制类型对应的反馈元素比如信号功率和/或干扰功率。
在该实现方式中，第二信号具体可以是第二数据，第二请求信息中第二数据的反馈类型和该反馈类型对应的反馈元素可以指示第二数据的数据量。示例性的，第二数据是信道状态信息，相应的，第二数据的反馈类型是信道状态类型，该反馈类型对应的反馈元素比如CQI、RI、PMI中一项或多项。进一步的，第二请求信息中包括信道状态类型和信道状态类型对应的反馈元素CQI，若约定第二终端设备向第一终端设备反馈是全带，则第一装置可以确定出第二数据的数据量约为5bit，若约定第二终端设备向第一终端设备反馈k个子带，k为正整数，则第一装置可以确定出第二数据的数据量约为5×kbit。
通过该方式，第一装置可以根据第二数据的反馈类型和反馈类型对应的反馈元素，确定第二数据的数据量，从而为第二终端设备分配资源，有助于提高资源分配的准确性，而且减少第一装置进行预配置的复杂度。
本实现方式中，第二请求信息还可以包括反馈时间信息，和/或，资源请求中还可以包括链路标识信息，具体可参见上述实现方式一中描述，此处不再赘述。
基于上述描述，如图9为本申请示例性提供的另一种资源请求所包含字段的示意图，示例性的，第一信号是第一参考信号，第二信号是第二数据，该资源请求中包括有链路标识信息、第一请求信息、第二请求信息，进一步的，链路标识信息包括第一标识信息和第二标识信息，第一请求信息包括第一类型(可以表示为Resource Type)和第一索引信息，第二请求信息包括第二数据的反馈类型、反馈类型对应的反馈元素和反馈时间信息(可以表示为TimeOffset_Rx)，其中第二数据的反馈类型、反馈类型对应的反馈元素用于指示第二数据的数据量(Resource Quantity)。
需要说明的是，虽然本申请记载资源请求中包括链路标识信息、第一请求信息和第二请求信息，但也可以理解，资源请求包括第一标识信息、第二标识信息、第一类型、第一索引信息、第二数据的反馈类型、反馈类型对应的反馈元素、反馈时间信息中一个或多个。
还需要说明的是，在第二信号的反馈类型与第一类型相关联的情况下，比如上述第一类型和第二数据的反馈类型均为信道状态类型，或均为定位信息类型，或均为辅助信息类型，或均为功率控制类型的情况下，第二请求信息中第二信号的反馈类型可复用第一请求信息中第一类型，也即，资源请求中包括第一标识信息、第二标识信息、第一类型、第一索引信息、反馈类型(即第一类型)对应的反馈元素、反馈时间信息中一个或多个，该第一类型不仅用于指示第一信号的类型，还用于指示第二数据的反馈类型。基于此，可以在 有效传达指示信息的前提下减少信令开销。
进一步的，资源请求中各字段可以承载于控制信道或数据信道中，也即第一终端设备可以将资源请求中各字段分多个信息/消息发送至第一装置中，且不同消息可以承载于不同信道中。一种可选方式中，第一终端设备可以通过数据信道向第一装置发送包括有第四标识信息的数据消息，第一终端设备可以通过控制信道向第一装置发送包括有第一类型、第一索引信息、第二数据的反馈类型、反馈类型对应的反馈元素、反馈时间信息和第三标识信息的控制消息。
示例性的，本实现方式可以适用于第一终端设备向第二终端设备发送第一参考信号，第二终端设备向第一终端设备反馈第二数据的场景中。
比如图6的家庭场景中，平板(即第一终端设备)与电视(即第二终端设备)之间进行短距离的数据通信，平板向电视传输视频数据之前，平板需要先获取平板和电视之间的信道状态信息，具体的，平板向手机(即第一装置)发送资源请求，该资源请求中包括第一请求信息和第二请求信息，其中第一请求信息包括CSI-RS的类型(即第一类型)和该类型对应的第一索引信息，第二请求信息包括信道状态类型和信道状态类型对应的反馈元素CQI，该资源请求用于指示手机分配用于平板向电视发送CSI-RS的资源，以及用于电视向平板发送信道状态信息的资源。
示例性的，本实现方式还可以适用于第一终端设备向第二终端设备发送第一数据，第二终端设备向第一终端设备反馈第二数据的场景中。
比如图5中(a)所示的V2X场景中，车辆A(即第一终端设备)与车辆B(即第二终端设备)之间进行短距离的数据通信，车辆A可以向网络设备(即第一装置)发送资源请求，该资源请求中包括第一请求信息和第二请求信息，其中第一请求信息包括车辆A向车辆B发送数据的业务类型和该业务类型对应的第一索引信息，第二请求信息包括信道状态类型和信道状态类型对应的反馈元素CQI，该资源请求用于指示网络设备分配用于车辆A向车辆B发送数据的资源，以及用于车辆B向车辆A发送信道状态信息的资源。
需要指出的是，在一些实施例中可能存在资源请求仅包括第一请求信息不包括第二请求信息，或者可能存在资源请求仅包括第二请求信息不包括第一请求信息的情况。在该类情况中，第一装置和第一终端设备可以预先确定对应关系，从而根据资源请求中的已知信息，推断出资源请求中的未知信息。
示例性的，第一装置和第一终端设备预先约定第一类型、第二数据的反馈类型和反馈元素三者之间的对应关系，比如第一类型和第二数据的反馈类型均为信道状态类型，信道状态类型对应的反馈元素为CQI，则资源请求中可以仅包括第一请求信息不包括第二请求信息，其中第一请求信息包括的第一类型为信道状态类型，该第一请求信息可以是指示出第二数据的反馈类型和反馈元素分别是信道状态类型和CQI。
步骤702，第一装置向第一终端设备发送资源响应，其中资源响应中包括第一指示信息和第二指示信息，第一指示信息用于指示第一分配资源，第二指示信息用于指示第二分配资源。
此处，第一装置需要根据当前资源分配情况，分别为第一终端设备和第二终端设备分配资源，则可能存在第一装置分别为第一终端设备和第二终端设备分配的资源与第一终端设备请求的第一资源和第二资源不同，为区分于上述第一资源和第二资源，如下可以将第 一装置为第一终端设备分配的用于发送第一信号的资源称为第一分配资源，将第一装置为第二终端设备分配的用于发送第二信号的资源称为第二分配资源。第一资源和第一分配资源可以相同或不同，第二资源和第二分配资源可以相同或不同。
首先对第一装置确定第一分配资源和第二分配资源的实现方式，说明如下：
可选的，第一装置确定资源请求中包括链路标识信息，即第一装置确定资源请求中包括第一标识信息、第二标识信息，则可以确定第一终端设备发送的资源请求是用于为第一终端设备请求第一资源，以及为第二终端设备请求第二资源的，相应的，第一装置根据资源请求中第一请求信息和第二请求信息分别确定第一分配资源和第二分配资源。
一种可选实现方式中，资源请求中还包括第一数据的数据量、第一数据的业务类型、第二数据的数据量、第二数据的反馈类型和反馈时间信息中一个或多个。相应的，第一装置根据第一数据的数据量确定第一终端设备发送第一数据所需要的资源量，根据第二数据的数据量确定第二终端设备发送第二数据所需要的资源量，然后根据第一数据所需要的资源量、第二数据所需要的资源量，结合第一数据的业务类型、第二数据的反馈类型、反馈时间信息，以及当前资源分配情况和信道质量等因素，确定第一分配资源和第二分配资源。
具体的，第一装置在确定第一资源时，若确定当前资源较紧张，则根据第一数据的业务类型，确定是否为第一终端设备分配资源，或者确定为第一终端设备分配资源的资源量。举例来说，若第一装置在接收到来自多个终端设备的资源请求时，比如接收来自终端设备1的资源请求1，以及接收来自终端设备2的资源请求2，其中资源请求1中第一数据的业务类型是视频，资源请求2中第一数据的业务类型是网页，第一装置若确定当前资源较紧张，则可以优先为终端设备1分配资源，然后再为终端设备2分配资源。
第一装置确定第二分配资源的实现方式，具体可参见上述确定第一分配资源的实现方式。进一步的，第一装置可以根据反馈时间信息确定第二分配资源中的时域资源和周期资源。示例性的，第二请求信息中包括反馈时间信息(TimeOffset_Rx)，第一装置可以将TimeOffset_Rx作为第二信号的反馈时间，或者在TimeOffset_Rx内选择满足时序要求的最早时间；若CSI-RS测量或者辅助信息是周期性配置/触发的，第一装置还可以据此来指示第二分配资源的周期资源。
再一种可选实现方式中，资源请求中还包括第一类型、第一索引信息、第二数据的反馈类型、反馈类型对应的反馈元素、反馈时间信息中一个或多个。相应的，第一装置根据资源请求中的第一索引信息，或第一索引信息和第一类型，确定第一终端设备请求的第一资源，以及根据资源请求中的第二数据的反馈类型和反馈类型对应的反馈元素，确定第一终端设备请求的第二资源的资源量，然后根据第一终端设备请求的第一资源和第二资源的资源量，结合第一类型、第二数据的反馈类型、反馈时间信息，以及当前资源分配情况和信道质量等因素，确定第一分配资源和第二分配资源。
具体的，第一装置在确定第一分配资源时，一个示例中，第一装置根据资源请求中第一索引信息，从预配置信息中确定出第一终端设备请求的第一资源。比如表1中，资源请求中包括索引信息2，则第一装置可以从预配置信息中确定出第一终端设备请求的第一资源是资源2，在确定资源2尚未分配给其他终端之后，将该资源2分配给第一终端设备，也即将资源2作为第一分配资源。
再一个示例中，第一装置根据资源请求中第一索引信息和第一类型，从预配置信息中 确定出第一终端设备请求的第一资源。比如表2中，资源请求中包括类型1和索引信息2，则第一装置可以从预配置信息中确定出第一终端设备请求的第一资源是资源2，在确定资源2尚未分配给其他终端设备之后，将该资源2分配给第一终端设备，也即将资源2作为第一分配资源。
此外，若其他终端设备(称为第三终端设备)请求的资源和第一终端设备请求的资源冲突，则第一装置可以根据第一类型和第三终端设备发送的资源请求中第一信号的类型，或者根据第一终端设备的终端优先级和第三终端设备的终端优先级，确定如何为第一终端设备和第三终端设备分配资源。
第一装置若确定当前第一终端设备请求的第一资源已经被其他终端占用，则第一装置可以自行选择一个与第一终端设备请求的第一资源相类似的资源，作为第一分配资源分配给第一终端设备。或者第一装置反馈给第一终端设备请求失败的响应，从而第一终端设备确定新的第一索引信息，或第一类型和第一索引信息，向第一装置发送新的资源请求。
第一装置在确定第二资源时，可以根据第二数据的反馈类型和反馈类型对应的反馈元素，预测第二数据的数据量，进而根据第二数据的数据量，确定第二数据所需要的资源量，然后根据第二数据所需要的资源量，确定第二分配资源。其中第一装置根据第二数据所需要的资源量，确定第二分配资源的方式具体可参见上述实现方式一中描述。
第一装置在确定第一分配资源和第二分配资源之后，根据第一分配资源和第二分配资源，生成资源响应。资源响应中包括第一指示信息和第二指示信息，其中第一指示信息用于指示第一分配资源，第二指示信息用于指示第二分配资源。相应的，第一终端设备从资源响应中获取到第一指示信息和第二指示信息。
本申请中，第一装置可以将第一指示信息、第二指示信息均承载于向第一终端设备发送的控制信道中。可选的，第一装置可以将第一指示信息和第二指示信息作为一条消息发送至第一终端设备，或者作为两条消息分别发送至第一终端设备中。
资源响应中还可以包括从资源请求中获取的链路标识信息(包括第一标识信息、第二标识信息)，该链路标识信息用于指示该资源响应所指示的两个资源分别是用于第一终端设备发送第一信号的第一分配资源和用于第二终端设备发送第二信号的第二分配资源。
相应的，第一终端设备从资源响应中获取到链路标识信息，确定资源响应中第一指示信息和第二指示信息分别用于指示第一分配资源和第二分配资源。
本申请中，由于第一装置在向第一终端设备发送资源响应时，该资源响应可以被其他终端设备接收到，此时，其他终端设备可以根据资源响应中第一指示信息和第二指示信息，对第一分配资源和第二分配资源上进行避让，从而其他终端设备不会与第一终端设备和/或第二终端设备竞争资源，保障整个交互过程中传输的正确率。
本申请还可以有如下实现方式，实现方式1，第一装置将第二指示信息直接发送至第二终端设备中，从而第一终端设备无需向第二终端设备发送从资源响应中获取的第二指示信息。实现方式2，第一装置分别向第一终端设备和第二终端设备发送资源响应(其中包括第一指示信息和第二指示信息)，从而第一终端设备无需向第二终端设备发送从资源响应中获取的第一指示信息和/或第二指示信息。
下面，结合具体场景解释说明上述资源分配方法。其中场景一中第一装置是组头终端 设备，场景二中第一装置是网络设备。
场景a：
第一终端设备、第二终端设备和组头终端设备，可以组成终端设备组，或未组成终端设备组，在第一终端设备与第二终端设备交互信号之前，第一终端设备可以向组头终端设备请求第一资源和第二资源。具体如下述步骤701-a和步骤702-a。
701-a，第一终端设备向组头终端设备发送资源请求。
可选的，第一终端设备与组头终端设备之间通过侧行链路通信。
示例(1)，资源请求中包括第一数据的数据量、第一数据的业务类型、第二数据的数据量、第二数据的反馈类型、反馈时间信息和链路标识信息。
其中第一数据的数据量、第二数据的数据量和第四标识信息可以承载于第一终端设备向组头终端设备发送的PSSCH中。第一数据的业务类型、第二数据的反馈类型、反馈时间信息和第三标识信息可以承载于第一终端设备向组头终端设备发送的PSCCH中，具体可以是一种新定义的二级SCI2中。
该新定义的二级SCI2的格式可以由一级SCI1指示，具体的，该一级SCI1中的格式指示信息(2nd-stage SCI format)用于指示该二级SCI2的新格式，新格式比如称为是格式1。在组头终端设备确定接收到的一级SCI1指示的二级SCI2为格式1的情况下，组头终端设备可以根据格式1解析接收到的二级SCI2。通过原有一级SCI1中的格式指示信息来指示新定义的二级SCI2的格式，该新定义的二级SCI2可以继承原有一级SCI1中的内容。
此外，也可以将第一数据的数据量、第二数据的数据量和第四标识信息承载于第一终端设备向组头终端设备发送的PSCCH中。
或者将第一数据的数据量、第二数据的数据量和第四标识信息中部分字段承载于第一终端设备向组头终端设备发送的PSSCH中，另一部分字段承载于第一终端设备向组头终端设备发送的PSCCH中。
或者将第一数据的业务类型、第二数据的反馈类型、反馈时间信息和第三标识信息承载于第一终端设备向组头终端设备发送的PSSCH中。
或者将第一数据的业务类型、第二数据的反馈类型、反馈时间信息和第三标识信息中部分字段承载于第一终端设备向组头终端设备发送的PSSCH中，另一部分字段承载于第一终端设备向组头终端设备发送的PSCCH中。
示例(2)，资源请求中包括第一索引信息、第一类型、第二数据的反馈类型、反馈类型对应的反馈元素、反馈时间信息和链路标识信息。
该示例的一种可选实现方式中，第一索引信息、第一类型、第二数据的反馈类型、反馈类型对应的反馈元素、反馈时间信息和链路标识信息可以承载于第一终端设备向组头终端设备发送的PSCCH中，具体可以是一种新定义的轻便型SCI。该轻便型SCI中还包括格式指示信息，格式指示信息可用于指示该SCI的格式为新格式，比如称为是格式2。当组头终端设备接收到该SCI时，解析该SCI得到该SCI中格式指示信息为格式2，组头终端设备根据格式2来解析该SCI。通过新定义的轻便型SCI，可以在资源请求中减少第一终端和组头终端设备之间交互的信令负载。
该示例的另一种可选实现方式中，第四标识信息可以承载于第一终端设备向组头终端设备发送的PSSCH中。第一索引信息、第一类型、第二数据的反馈类型、反馈类型对应 的反馈元素、反馈时间信息和第三标识信息可以承载于第一终端设备向组头终端设备发送的PSCCH中，具体可以是一种新定义的二级SCI2中。
该新定义的二级SCI2的格式可以由一级SCI1指示，具体的，该一级SCI1中的格式指示信息用于指示该二级SCI2的新格式，新格式比如称为是格式3。在组头终端设备确定接收到的一级SCI1指示的二级SCI2为格式3的情况下，组头终端设备可以根据格式3解析接收到的二级SCI2。通过原有一级SCI1中的格式指示信息来指示新定义的二级SCI2的格式，该新定义的二级SCI2可以继承原有一级SCI1中的内容。
此外，也可以将第四标识信息承载于第一终端设备向组头终端设备发送的PSCCH中。
或者将第一索引信息、第一类型、第二数据的反馈类型、反馈元素、反馈时间信息和第三标识信息承载于第一终端设备向组头终端设备发送的PSSCH中。
或者将第一索引信息、第一类型、第二数据的反馈类型、反馈元素、反馈时间信息和第三标识信息中部分字段承载于第一终端设备向组头终端设备发送的PSSCH中，另一部分字段承载于第一终端设备向组头终端设备发送的PSCCH中。
702-a，组头终端设备向第一终端设备发送资源响应。
组头终端设备根据资源请求确定第一分配资源和第二分配资源，然后再根据第一分配资源和第二分配资源，生成资源响应。资源响应中包括第一指示信息和第二指示信息、链路标识信息。
其中第四标识信息可以承载于组头终端设备向第一终端设备发送的PSSCH中。第一指示信息、第二指示信息和第三标识信息可以承载于组头终端设备向第一终端设备发送的PSCCH中，具体可以是一种新定义的二级SCI2中。
该新定义的二级SCI2的格式可以由一级SCI1指示，具体的，该一级SCI1中的格式指示信息用于指示该二级SCI2的新格式，新格式比如称为是格式4。在第一终端设备确定接收到的一级SCI1指示的二级SCI2为格式4的情况下，第一终端设备可以根据格式4解析接收到的二级SCI2。
此外，也可以将第四标识信息承载于组头终端设备向第一终端设备发送的PSCCH中。
或者将第一指示信息、第二指示信息和第三标识信息承载于组头终端设备向第一终端设备发送的PSSCH中。
或者将第一指示信息、第二指示信息和第三标识信息中部分字段承载于组头终端设备向第一终端设备发送的PSSCH中，另一部分字段承载于组头终端设备向第一终端设备发送的PSCCH中。
场景b：
第一终端设备和第二终端设备在网络设备的服务小区中，在第一终端设备与第二终端设备交互信号之前，第一终端设备可以向网络设备请求第一资源和第二资源。具体如下述步骤701-b和步骤702-b。
步骤701-b，第一终端设备向网络设备发送资源请求。
示例(a)，资源请求中包括第一数据的数据量、第一数据的业务类型、第二数据的数据量、第二数据的反馈类型、反馈时间信息和链路标识信息。
其中第一数据的数据量、第二数据的数据量和第四标识信息可以承载于第一终端设备 向网络设备发送的物理上行共享信道(physical uplink shared channel，PUSCH)中。第一数据的业务类型、第二数据的反馈类型、反馈时间信息和第三标识信息可以承载于第一终端设备向网络设备发送的物理上行控制信道(physical uplink control channel，PUCCH)中，具体可以是一种新定义的上行控制信息(uplink control information，UCI)中。
UCI中的格式指示信息可以用于指示该UCI是否采用新格式，新格式比如称为是格式5。当网络设备接收到该UCI时，解析该UCI中格式指示信息，确定当前UCI采用格式5，则网络设备可以根据格式5解析当前UCI。
此外，也可以将第一数据的数据量、第二数据的数据量和第四标识信息承载于第一终端设备向网络设备发送的PUCCH中。
或者将第一数据的数据量、第二数据的数据量和第四标识信息中部分字段承载于第一终端设备向网络设备发送的PUSCH中，另一部分字段承载于第一终端设备向网络设备发送的PUCCH中。
或者将第一数据的业务类型、第二数据的反馈类型、反馈时间信息和第三标识信息承载于第一终端设备向网络设备发送的PUSCH中。
或者将第一数据的业务类型、第二数据的反馈类型、反馈时间信息和第三标识信息中部分字段承载于第一终端设备向网络设备发送的PUSCH中，另一部分字段承载于第一终端设备向网络设备发送的PUCCH中。
示例(b)，资源请求中包括第一索引信息、第一类型、第二数据的反馈类型、反馈类型对应的反馈元素、反馈时间信息和链路标识信息。
该示例的一种可选实现方式中，第一索引信息、第一类型、第二数据的反馈类型、反馈类型对应的反馈元素、反馈时间信息和链路标识信息可以承载于第一终端设备向网络设备发送的PUCCH中，具体可以是一种新定义的轻便型UCI。该轻便型UCI中还包括格式指示信息，格式指示信息可用于指示该UCI的格式为新格式，新格式比如称为是格式6。当网络设备接收到该UCI时，解析该UCI得到该UCI中格式指示信息为格式6，则网络设备可以根据格式6来解析该UCI。通过新定义的轻便型UCI，可以在资源请求中减少第一终端和网络设备之间交互的信令负载。
该示例的另一种可选实现方式中，第四标识信息可以承载于第一终端设备向网络设备发送的PUSCH中。第一索引信息、第一类型、第二数据的反馈类型、反馈类型对应的反馈元素、反馈时间信息和第三标识信息可以承载于第一终端设备向网络设备发送的PUCCH中，具体可以是一种新定义的UCI中。
该新定义的UCI可以是在已有UCI中新增第一索引信息、第一类型、第二数据的反馈类型、反馈类型对应的反馈元素、反馈时间信息和第三标识信息，UCI中格式指示信息用于指示该UCI是否采用新格式，新格式比如称为是格式7。当网络设备接收到该UCI时，解析该格式指示信息，确定当前UCI采用格式7，则网络设备可以根据格式7解析当前UCI。
此外，也可以将第四标识信息承载于第一终端设备向网络设备发送的PUCCH中。
或者将第一索引信息、第一类型、第二数据的反馈类型、反馈类型对应的反馈元素、反馈时间信息和第三标识信息承载于第一终端设备向网络设备发送的PUSCH中。
或者将第一索引信息、第一类型、第二数据的反馈类型、反馈类型对应的反馈元素、反馈时间信息和第三标识信息中部分字段承载于第一终端设备向网络设备发送的PUSCH中，另一部分字段承载于第一终端设备向网络设备发送的PUCCH中。
步骤702-b，网络设备向第一终端设备发送资源响应。
网络设备根据资源请求确定第一分配资源和第二分配资源，然后再根据第一分配资源和第二分配资源，生成资源响应。资源响应中包括第一指示信息和第二指示信息、链路标识信息。
其中第四标识信息可以承载于网络设备向第一终端设备发送的下行共享物理信道(physical downlink shared channel，PDSCH)中。该第一指示信息、第二指示信息和第三标识信息可以承载于网络设备向第一终端设备发送的物理下行控制信道(physical downlink control channel，PDCCH)中，具体可以一种新定义的DCI中。
DCI中的格式指示信息可以用于指示该DCI是否采用新格式，比如称为是格式8。当第一终端设备接收到该DCI时，解析该DCI中格式指示信息，确定当前DCI采用格式8，则第一终端设备可以根据格式8解析当前DCI。
此外，也可以将第四标识信息承载于网络设备向第一终端设备发送的PDCCH中。
或者将第一指示信息、第二指示信息和第三标识信息承载于网络设备向第一终端设备发送的PDSCH中。
或者将第一指示信息、第二指示信息和第三标识信息中部分字段承载于网络设备向第一终端设备发送的PDSCH中，另一部分字段承载于网络设备向第一终端设备发送的PDCCH中。
上述步骤701和步骤702中(包括步骤701-a、步骤702-a和步骤701-b、步骤702-b)已经详细描述了本申请实施例的资源分配方法，从而第一终端设备可以从资源响应中获取第一指示信息和/或第二指示信息，进而根据第一指示信息向第二终端设备发送第一信号，以及根据第二指示信息接收来自第二终端设备的第二信号。
下面，具体说明第一终端设备在获取到资源响应之后，第一终端设备与第二终端设备进行信号交互的具体实现方式，可继续参见如图7所示的步骤703至步骤705。
步骤703，第一终端设备向第二终端设备发送控制信息，控制信息中包括第一指示信息和/或第二指示信息。
一种可选实现方式中，第一终端设备根据资源响应，生成控制信息，向第二终端设备发送控制信息。控制信息中可以包括第二指示信息，控制信息用于指示第二终端设备在第二分配资源上向第一终端设备发送第二信号。此外，控制信息中还可以包括第一指示信息，控制信息还用于指示第二终端设备在第一分配资源上接收来自第一终端设备的第二信号。
本申请中，第一终端设备可以将第一指示信息、第二指示信息均承载于向第二终端设备发送的控制信道中。可选的，第一终端设备可以将第一指示信息和第二指示信息作为一条消息发送至第二终端设备，或者作为两条消息分别发送至第二终端设备中。
可选的，控制信息中还可以包括预设反馈类型，该预设反馈类型用于指示第二终端设备向第一终端设备发送与该预设反馈类型相对应的第二信号。示例性的，在上述CSI测量场景中，控制信息中还可以包括预设反馈类型，预设反馈类型比如信道状态类型，相应的，第二终端设备可以测量CSI-RS(即第一信号)得到信道状态信息(即第二信号)。进一步的，控制信息中还可以包括预设反馈类型对应的预设反馈元素，预设反馈类型对应的预设反馈元素比如信道状态类型对应的CQI，第二终端设备可以测量CSI-RS(即第一信号)得 到CQI(即第二信号)。
步骤704，第一终端设备在第一指示信息指示的第一分配资源上向第二终端设备发送第一信号。
具体的，第一终端设备根据第一指示信息确定第一分配资源，然后在第一分配资源上向第二终端设备发送第一信号。相应的，第二终端设备根据第一指示信息确定第一分配资源，然后在第一分配资源上接收来自第一终端设备的第一信号。
步骤705，第二终端设备在第二指示信息指示的第二分配资源上向第一终端设备发送第二信号。
具体的，第二终端设备根据第二指示信息确定第二分配资源，然后在第二分配资源上向第一终端设备发送第二信号。相应的，第一终端设备根据第二指示信息确定第二分配资源，然后在第二分配资源上接收来自第二终端设备的第二信号。
该步骤中，第一终端设备可以根据第二指示信息确定出第二分配资源，也即确定出第二终端设备发送第二信号的资源，第一终端设备无需盲检第二信号，直接在第二分配资源上接收来自第二终端设备的第二信号即可，有助于节省第一终端设备的功耗。
一种可选实现方式中，第二终端设备可以根据第一信号，确定向第一终端设备发送的第二信号，即第二信号和第一信号相关联。示例性的，第二终端设备可以根据控制信息中的预设反馈类型，向第一终端设备发送与该预设反馈类型相对应的第二信号。
需要说明的是，本申请的另一种可选方式中，第一指示信息可以指示M个资源，第一终端设备可以基于第一指示信息向第二终端设备发送M次第一信号，M为正整数。同样的，第二指示信息可以指示N个资源，第二终端设备可以基于第二指示信息向第一终端设备发送N次第二信号，N为正整数，其中M可以等于或不等于N。
如图10为本申请提供的一种第一终端设备与第二终端设备交互信号的流程示意图。
步骤1001，第一终端设备向第二终端设备发送第一控制信息和第二控制信息。
其中，第一控制信息可以包含第一字段或第二字段中的至少一个，该第一字段或第二字段中的至少一个指示第一控制信息的格式，该第一字段或第二字段中的至少一个指示第二控制信息的格式。
示例性的，第一控制信息可以同时包括第一字段和第二字段，通过第一字段和第二字段共同指示第一控制信息的格式及第二控制信息的格式，例如，通过第一字段指示第一控制信息的格式，通过第二字段指示第二控制信息的格式；或者，通过第一字段指示第二控制信息的格式，通过第二字段指示第一控制信息的格式。
示例性的，第一控制信息可以只包括第一字段，或者，第一控制信息可以只包括第二字段，通过第一字段(或第二字段)单独指示第一控制信息的格式及第二控制信息的格式。
其中，第一控制信息的格式至少包括第一格式a和第二格式a，其中，第一格式a指示第二终端设备反馈第二信号的时频资源(相当于第二分配资源)，第二格式a指示第一终端设备发送数据信道的传输信息。
可选的，第一控制信息可以为SCI。现有标准协议中，SCI的格式包括一级SCI1及二级SCI2，其中，SCI1包括SCI1-A，SCI2包括SCI2-A及SCI2-B，SCI1-A中所包含字段及各字段的释义可参见表3，SCI2-A中所包含字段及各字段的释义可参见表4。示例性的，第二格式a可以为现有的一级SCI1，例如，可以为上述标准协议中SCI1-A；第一格式a 可以为一种新的一级SCI1，为了与标准协议中SCI1-A区别，本申请实施例中将该新的一级SCI1定义为SCI1-B，其中，SCI1-B可以复用SCI1-A中至少一个字段，并对所复用的每一字段所指示的信息进行重新定义。
示例性的，第二信号可以包括：信道状态信息、辅助资源选择信息、定位测量信息、功率控制辅助信息等承载在PSSCH中的信息。
示例性的，数据信道可以为PSSCH；传输信息可以包括与该数据信道传输有关的信息，如：解调参考信号(Demodulation Reference Signal，DMRS)、调制编码方案(Modulation Coding Scheme，MCS)、天线端口信息、时频资源、频域资源等信息。
其中，第二控制信息的格式至少包括第三格式和第四格式，其中，第三格式指示第二终端设备反馈第二信号的冗余版本(Redundancy Version，RV)；第四格式指示第一终端设备发送数据信道(也称数据信息)的冗余版本。可选的，第二控制信息可以为SCI；示例性的，第四格式可以为现有的二级SCI2，例如，可以为标准协议二级SCI2中的SCI2-A或SCI2-B。为了方便表述，本申请实施例中以第四格式为标准协议中SCI2-A进行示例性说明；第三格式可以为一种新的二级SCI2，为了与标准协议中SCI2-A及SCI2-B区别，本申请实施例中将该新的二级SCI2定义为SCI2-C；其中，SCI2-C可以复用SCI2-A中至少一个字段，并对所复用的每一字段所指示的信息进行重新定义。
示例性的，SCI2-C复用SCI2-A中的Redundancy version字段，在SCI2-C中的Redundancy version字段指示第二终端设备反馈第二信号的冗余版本；这样不会额外增加PSCCH信令开销，保证系统传输性能。
下面对指示第一控制信息的格式及第二控制信息的格式的方式进行示例性说明：
方式一，在第一控制信息同时包括第一字段和第二字段时，通过第一字段的不同取值可以指示第一控制信息的格式，通过第二字段的不同取值可以指示第二控制信息的格式。
示例性的，可以通过第一字段中的1比特(bit)或2比特表示第一控制信息的格式，例如，该1比特值为0时指示第一控制信息的格式为第一格式a，该1比特值为1时指示第一控制信息的格式为第二格式a；或者，该1比特值为1时指示第一控制信息的格式为第一格式a，该1比特值为0时指示第一控制信息的格式为第二格式a；或者，该2比特值为00时指示第一控制信息为第二格式a，该2比特值为11(或10或01)时指示第一控制信息为第一格式a。
再例如，可以通过第二字段中的1比特或2比特表示第二控制信息的格式，例如，该1比特值为0时指示第二控制信息的格式为第三格式，该1比特值为1时指示第二控制信息的格式为第四格式；或者，该1比特值为1时指示第二控制信息的格式为第三格式，该1比特值为0时指示第二控制信息的格式为第四格式；或者，该2比特值为00(或01)时指示第二控制信息为第四格式，该2比特值为10(或11)时指示第二控制信息为第三格式。
作为一个示例，第一字段可以为SCI1-A和SCI1-B中的字段Reserved(保留比特位)，利用该字段Reserved中的1比特或者2比特指示第一控制信息的格式，例如，该2比特值为00时指示第一控制信息为SCI1-A，该2比特值为11时指示第一控制信息为SCI1-B；或者，该1比特值为0时指示第一控制信息为SCI1-A，该1比特值为1时指示第一控制信息为SCI1-B；或者，该1比特值为1时指示第一控制信息为SCI1-A，该1比特值为0时指示第一控制信息为SCI1-B。
第二字段可以为SCI1-A和SCI1-B中的字段2nd-stage SCI format(二级SCI2格式)， 利用该字段2nd-stage SCI format中的1比特或者2比特指示第二控制信息的格式，例如，该2比特值为00时指示第二控制信息为SCI2-A，该2比特值为11时指示第二控制信息为SCI2-C；或者，该1比特值为0时指示第二控制信息为SCI2-A，该1比特值为1时指示第二控制信息为SCI2-C。
该方式中，通过对标准协议中SCI格式中的Reserved字段及2nd-stage SCI format字段进行修改，使得Reserved中的1比特或者2比特指示第一控制信息的格式，2nd-stage SCI format中的1比特或者2比特指示第二控制信息的格式，这样，通过复用标准协议中SCI格式的字段，不会额外增加PSCCH信令开销，保证系统传输性能。
方式二，在第一控制信息只包括第一字段(或第二字段)时，可以通过第一字段(或第二字段)的不同取值指示第一控制信息的格式及第二控制信息的格式。
例如，第一字段(或第二字段)中的2比特表示第一控制信息的格式及第二控制信息的格式，该2比特值为00时指示第一控制信息的格式为第一格式a，第二控制信息的格式为第三格式；该2比特值为01时指示第一控制信息的格式为第一格式a，第二控制信息的格式为第四格式；该2比特值为10时指示第一控制信息的格式为第二格式a，第二控制信息的格式为第三格式；该2比特值为11时指示第一控制信息的格式为第二格式a，第二控制信息的格式为第四格式。
再例如，第一字段(或第二字段)中的1比特表示第一控制信息的格式及第二控制信息的格式，该1比特的值为0指示第一控制信息的格式为第一格式a，且第二控制信息的格式为第三格式；该1比特的值为1指示第一控制信息的格式为第二格式a，且第二控制信息的格式为第四格式；或者，该1比特的值为1指示第一控制信息的格式为第一格式a，且第二控制信息的格式为第三格式；该1比特的值为0指示第一控制信息的格式为第二格式a，且第二控制信息的格式为第四格式。
作为一个示例，第一字段可以为SCI1-A和SCI1-B中的字段Reserved(或2nd-stage SCI format字段)，利用该字段Reserved(或2nd-stage SCI format)中的2比特指示第一控制信息的格式及第二控制信息的格式，例如，该2比特值为11时指示第一控制信息为SCI1-B，第二控制信息为SCI2-C；该2比特值为01时指示第一控制信息的格式为SCI1-B，第二控制信息的格式为SCI2-A；该2比特值为10时指示第一控制信息的格式为SCI1-A，第二控制信息的格式为SCI2-C；该2比特值为00时指示第一控制信息的格式为SCI1-A，第二控制信息的格式为SCI2-A。
作为一个示例，第一字段可以为SCI1-A和SCI1-B中的字段Reserved(或2nd-stage SCI format字段)，利用该字段Reserved(或2nd-stage SCI format)中的1比特指示第一控制信息的格式及第二控制信息的格式，例如，该1比特值为0时指示第一控制信息为SCI1-B，第二控制信息为SCI2-C，该1比特值为1时指示第一控制信息的格式为SCI1-A，第二控制信息的格式为SCI2-A；或者，该1比特值为1时指示第一控制信息为SCI1-B，第二控制信息为SCI2-C，该1比特值为0时指示第一控制信息的格式为SCI1-A，第二控制信息的格式为SCI2-A。
该方式中，对标准协议中SCI格式中的Reserved字段(或2nd-stage SCI format字段)进行修改，使得Reserved(或2nd-stage SCI format)中的2比特或1比特指示第一控制信息的格式及第二控制信息的格式，这样，仅复用标准协议中SCI格式的一个字段，不会额外增加PSCCH信令开销，保证系统传输性能。
下面对第一控制信息或第二控制信息中可以包含的其他字段进行介绍：
在一种可选实现方式中，第一格式a还可以包括：指示该时频资源的至少一个字段。这样，第一终端设备通过该至少一个字段为第二终端设备反馈第二信号预留时频资源，保证该第二信号可以在该时频资源上及时、成功地反馈。
需要说明的是，预留的时域资源无需长时间持续占用一段时间，只是预留了少部分时频图样，满足反馈第二信号即可，从而在尽可能小的开销下达到性能最优。
示例性的，第一格式a中的两个字段指示为第二信号预留的时频资源，这两个字段中一个字段可以指示第二信号预留的时域资源、一个字段可以指示预留的频域资源；或者，第一格式a中的一个字段用于指示为第二信号预留的时频资源，这一个字段可以同时指示为第二信号预留的时域资源及预留的频域资源。可以理解的是，第一格式a中的三个或更多字段可以指示时频资源，本申请实施例对指示时频资源的字段数量不进行限定。
作为一个示例，SCI1-B复用SCI1-A中的Frequency resource assignment(频域资源分配)字段和Time resource assignment(时域资源分配)字段，SCI1-B中的Frequency resource assignment字段和Time resource assignment字段用于指示为第二信号预留的时频资源，其中，Frequency resource assignment字段用于指示预留的频域资源，Time resource assignment字段用于指示预留的时域资源。这样，不会额外增加PSCCH信令开销，保证系统传输性能。
在一种可选实现方式中，考虑到第二终端设备针对第二信号的时间处理能力，第一终端设备为第二终端设备预留的时频资源满足第二终端设备针对第二信号的processing time capability(时间处理能力)，从而可以保证第二终端设备有时间处理第二信号，并将处理后的第二信号及时、成功地反馈，保障系统的有效运转。
例如，若第二信号为信道状态信息，第二终端设备需要占用一定时间对信道状态进行测量，从而生成信道状态信息，将预留的时频资源位置设置在第二终端设备完成信道状态测量之后，预留的时域资源位置可以满足第二终端设备针对CSI processing time capability(信道状态信息的时间处理能力)；再例如，若第二信号为功率控制辅助信息，第二终端设备需要占用一定时间对功率等进行测量，从而生成功率控制辅助信息，将预留的时频资源位置设置在第二终端设备完成功率等测量之后，预留的时域资源位置可以满足第二终端设备针对相应辅助信息的processing time capability(辅助信息的时间处理能力)。
在一种可选实现方式中，第三格式还包括：用于指示第二信号的反馈类型的至少一个字段。这样，第一终端设备通过该至少一个字段指示第二终端设备需要反馈的第二信号的反馈类型，从而保证信道状态信息、辅助资源选择信息、定位测量信息、功率控制辅助信息等第二信号可以有效及时地反馈，提升系统性能。
示例性的，第三格式的一个字段用于指示第二信号的反馈类型，该字段可以包括2个比特，该字段的不同取值指示第二信号不同的类型，例如，该2比特值为00时指示第二信号的反馈类型为信道状态类型；该2比特值为01时指示第二信号的反馈类型为辅助信息类型；该2比特值为10时指示第二信号的反馈类型为定位信息类型；该2比特值为11时指示第二信号的反馈类型为功率控制类型。
需要说明的是，第一格式a中用于指示第二信号的字段数量以及各字段所包含的比特个数可以根据第二信号的反馈类型确定；例如，若第二信号包含四种类型，第一格式a可以通过包含2个比特或包含更多比特的一个字段指示第二信号；第一格式a也可以通过共 包含2个比特或共包含更多比特的两个字段共同指示第二信号，本申请实施例对此不作限定。
作为一个示例，SCI2-C复用SCI2-A中的CSI request(信道状态信息请求)字段，在SCI2-A中的CSI request字段占用1bit，在SCI2-C中CSI request字段由原来的1bit，扩展至X bits，其中，X为正整数；该X比特的不同取值用于指示第二信号不同的类型；可选的，若第二信号包含四种类型，则X可以为2。这样，通过复用SCI2-A中的CSI request字段，保证系统传输性能。
在一种可选实现方式中，第一格式a还包括：指示第二终端设备反馈第二信号时使用的调制编码及解调导频信息的至少一个字段。这样，第一终端设备通过该至少一个字段指示第二终端设备使用该调制编码及解调导频信息反馈该第二信号，从而保证第二信号的及时、成功地反馈。
示例性的，调制编码及解调导频信息可以包括：调制和编码方案、导频图案、导频端口数量、调制和编码方案表格指示等。第一格式a中的多个字段指示第二终端设备反馈第二信号时使用的调制编码及解调导频信息。例如，可以通过四个字段指示第二终端设备反馈第二信号时使用的调制编码及解调导频信息；其中，一个字段指示第二终端设备反馈第二信号时使用的调制和编码方案，一个字段指示第二终端设备反馈第二信号时使用的导频图案，一个字段指示第二终端设备反馈第二信号时使用的调制和编码方案表格，一个字段指示第二终端设备反馈第二信号时使用的导频端口数量。
作为一个示例，SCI1-B复用SCI1-A中的Modulation and coding scheme(调制和编码方案)字段、Additional MCS table indicator(附加调制和编码方案表格)字段、DMRS pattern(解调参考信号图案)字段、Number of DMRS port(解调参考信号端口数量)字段，SCI1-B中的这四个字段中，Modulation and coding scheme字段指示第二终端设备反馈第二信号时使用的调制和编码方案；Additional MCS table indicator字段指示第二终端设备反馈第二信号时使用的调制和编码方案表格；DMRS pattern字段指示第二终端设备反馈第二信号时使用的导频图案；Number of DMRS port字段指示第二终端设备反馈第二信号时的端口信息。这样，SCI1-B通过复用SCI1-A中的字段，不会额外增加PSCCH信令开销，保证系统传输性能。
在一种可选实现方式中，第一格式a还包括：指示第二终端设备反馈第二信号的周期的至少一个字段。这样，在第一终端设备期望第二终端设备周期性地反馈第二信号时，第一终端设备可以通过该至少一个字段指示第二终端设备按照该周期反馈第二信号，从而可以保障系统的有效运转。
示例性的，可以通过第一格式a中的一个字段指示第二终端设备反馈第二信号的周期，例如，若第二信号为信道状态信息，第一终端设备期望第二终端设备每隔5ms就反馈一次信道状态信息；可以通过第一格式a中的这一个字段指示第二终端设备反馈信道状态信息的周期为5ms。可以理解的是，第一格式a中更多字段可以指示第二终端设备反馈第二信号的周期，本申请实施例对第二终端设备反馈第二信号的周期的字段数量不进行限定。
作为一个示例，SCI1-B复用SCI1-A中的Resource reservation period(预留资源的周期)字段，在SCI1-B中Resource reservation period字段指示第二终端设备反馈第二信号的周期。这样，通过复用SCI1-A中的Resource reservation period字段，不会额外增加PSCCH信令开销，保证系统传输性能。
在一种可选实现方式中，第三格式还包括：第一控制信息和第二控制信息的源标识(即第一标识信息)的所有比特，及第一控制信息和第二控制信息的目的地标识(即第二标识信息)的所有比特。考虑到第一终端设备向第二终端设备可以只发送第一控制信息和第二控制信息，未发送关联的数据信道，此时存在物理层L1的源标识和目的地标识，但是缺少数据链路层L2的源标识和目的地标识；这样，第一终端设备通过第三格式中源标识的所有比特和目的地标识的所有比特可以清楚的指示第一控制信息和第二控制信息的源标识及目的地标识，从而保证第一终端设备所期望的对象及时、成功地反馈第二信号。
示例性的，在第三格式中的两个字段中包含第一控制信息和第二控制信息的源标识的所有比特，及第一控制信息和第二控制信息的目的地标识的所有比特；其中，一个字段包含第一控制信息和第二控制信息的源标识的所有比特，另一个字段包含第一控制信息和第二控制信息的目的地标识的所有比特。可以理解的是，第三格式中可以一个字段或者更多字段包含第一控制信息和第二控制信息的源标识的所有比特，及第一控制信息和第二控制信息的目的地标识的所有比特，本申请实施例对此不进行限定。
作为一个示例，SCI2-C复用SCI2-A中的Source ID(源身份标识)字段和Destination ID(目的地身份标识)字段，在SCI2-A中的Source ID字段只包含物理层L1的源标识，在SCI2-C中Source ID字段中补齐物理层L1和数据链路层L2的源标识；在SCI2-A中的Destination ID字段只包含物理层L1的目的地标识，在SCI2-C中Destination ID字段中补齐物理层L1和数据链路层L2的目的地标识。这样，尽可能复用SCI2-A中的Source ID字段和Destination ID字段，以保证系统传输性能。
作为一个示例，SCI2-C复用SCI2-A中的New data indicator(新传数据指示，NDI)字段、Redundancy version(冗余版本)字段、HARQ feedback enabled/disabled indicator(混合自动重传请求处理反馈使能/不使能指示)字段、Source ID字段及Destination ID字段。第一终端设备与第二终端设备预先约定，在第二控制信息为SCI2-C时对应的NDI、冗余版本和HARQ反馈使能/不使能指示按照预先约定的处理，从而使得NDI、冗余版本和HARQ反馈使能/不使能指示存在空闲比特。这样，在SCI2-C中Source ID字段指示物理层L1的源标识，Destination ID字段指示物理层L1的目的地标识，NDI、冗余版本和HARQ反馈使能/不使能指示字段空闲出来的比特可以用来指示SCI1-B和SCI2-C的数据链路层L2的源标识，及SCI1-B和SCI2-C的数据链路层L2的目的地标识，若上述空闲出来的比特不足，则可进一步通过增加比特的方式补齐。例如，可以在SCI2-C中New data indicator及HARQ feedback enabled/disabled indicator字段中的空闲比特补齐SCI1-B和SCI2-C的数据链路层L2的源标识的所有比特，在Redundancy version字段中的空闲比特补齐SCI1-B和SCI2-C的数据链路层L2的目的地标识的所有比特，再例如，可以在SCI2-C中New data indicator及HARQ feedback enabled/disabled indicator字段中的空闲比特补齐SCI1-B和SCI2-C的数据链路层L2的目的地的所有比特，Redundancy version字段中的空闲比特补齐SCI1-B和SCI2-C的数据链路层L2的源标识的所有比特；若上述空闲比特不足，则可进一步通过增加比特的方式补齐。这样，通过复用SCI2-A中的New data indicator字段、HARQ feedback enabled/disabled indicator字段、Redundancy version字段、Source ID字段及Destination ID字段，从而保证系统传输性能。
需要说明的是，除上述作为示例性的说明的字段之外，第一控制信息和第二控制信息中还可以包括其他字段，本申请实施例对此不作限定。
举例来说，以第一格式a为SCI1-B，第二格式a为SCI1-A为例，SCI1-B复用SCI1-A中字段，表3为SCI1-B与SCI1-A中相同字段的释义对比表。如表3所示，SCI1-A为现有标准协议SCI格式，其中，Reserved字段中的保留2比特值默认为00，表明该SCI1为SCI1-A；SCI1-A中字段及各字段对应的释义与标准协议中SCI1-A中字段及各字段对应的释义相同。SCI1-B包含与SCI1-A相同的字段，但相同字段的释义存在区别。
表3
Figure PCTCN2021134109-appb-000003
如表3所示，Priority(优先级)字段，在SCI1-A中指示第一终端设备当次传输所占用的时频资源的优先级及未来预留的时频资源的优先级，在SCI1-B中指示第一终端设备为第二终端设备预留的时频资源的优先级。Frequency resource assignment字段，在SCI1-A中指示第一终端设备当次传输所占用的时频资源及未来预留的频域资源，在SCI1-B中指示第一终端设备为第二终端设备反馈第二信号预留的频域资源。Time resource assignment字段，在SCI1-A中指示第一终端设备当次传输所占用的时频资源及未来预留的时域资源，在SCI1-B中指示第一终端设备为第二终端设备反馈第二信号预留的时域资源。Resource  reservation period字段，在SCI1-A中指示第一终端设备为未来预留的时域资源的周期，在SCI1-B中指示第一终端设备指示第二终端设备反馈第二信号的周期。DMRS pattern字段，在SCI1-A中指示第一终端设备传输的导频图案，在SCI1-B中指示第一终端设备指示第二终端设备反馈第二信号时使用的导频图案。2nd-stage SCI format字段，在SCI1-A中指示SCI1-A指示的对应的SCI2的格式，在SCI1-B中指示SCI1-B所对应的SCI2格式为SCI2-C。Beta_offset indicator(β偏移指示)字段，在SCI1-A中指示SCI 2的相关参数，在SCI1-B中指示SCI2-C的相关参数。Number of DMRS port字段，在SCI1-A中指示第一终端设备传输的端口信息，在SCI1-B中指示第一终端设备指示第二终端设备反馈第二信号的端口信息。Modulation and coding scheme字段，在SCI1-A中指示第一终端设备传输的MCS，在SCI1-B中指示第一终端设备指示第二终端设备反馈第二信号时使用的MCS。Additional MCS table indicator字段，在SCI1-A中指示第一终端设备传输的MCS Table，在SCI1-B中指示第一终端设备指示第二终端设备反馈第二信号的MCS Table。PSFCH overhead indication(PSFCH开销指示)字段，在SCI1-A中指示第一终端设备传输对应的PSFCH开销信息，在SCI1-B中指示第一终端设备指示第二终端设备反馈指示消息的PSFCH开销信息。Reserved字段，在SCI1-A中为保留比特，无额外指示信息，在SCI1-B中指示格式为SCI1-B。
以第三格式为SCI2-C，第四格式为SCI2-A为例，SCI2-C复用SCI2-A中字段，表4为SCI2-C与SCI2-A中相同字段的释义对比表。如表4所示，SCI2-A为现有标准协议SCI格式，SCI2-A中字段及各字段对应的释义与标准协议中SCI2-A中字段及各字段对应的释义相同。SCI2-C包含与SCI2-A相同的字段，但相同字段的释义存在区别。
表4
Figure PCTCN2021134109-appb-000004
如表4所示，HARQ process number(混合自动重传请求处理进程号)字段，在SCI2-A 中指示第一终端设备传输的HARQ处理进程号，在SCI2-C中指示第一终端设备指示第二终端设备反馈第二信号的HARQ进程号。New data indicator字段，在SCI2-A中指示第一终端设备传输的NDI信息，在SCI2-C中指示第一终端设备指示第二终端设备反馈第二信号的NDI信息。Redundancy version字段，在SCI2-A中指示第一终端设备传输的冗余版本号，在SCI2-C中的指示第一终端设备指示第二终端设备反馈第二信号的冗余版本号。Source ID字段，在SCI2-A中指示第一终端设备传输对应的源ID，在SCI2-C中的指示第一终端设备传输对应的物理层L1的源ID和数据链路层L2的源ID信息。Destination ID字段，在SCI2-A中指示第一终端设备传输对应的目的ID，在SCI2-C中的指示第一终端设备传输对应的物理层L1的目标ID和数据链路层L2的目标ID信息。HARQ feedback enabled/disabled indicator字段，在SCI2-A中指示第一终端设备传输关联的HARQ是否反馈的使能，在SCI2-C中的指示第一终端设备指示第二终端设备反馈第二信号是否有HARQ反馈。Cast type indicator(类型转换指示)字段，在SCI2-A中指示第一终端设备传输的Cast类型，在SCI2-C中第一终端设备传输的Cast类型。CSI request字段，在SCI2-A中指示第一终端设备触发第二终端设备反馈CSI，在SCI2-C中指示第一终端设备指示第二终端设备反馈第二信号的反馈类型。
需要说明的是，上述表3和表4中为SCI1-B、SCI1-A、SCI2-C、SCI2-A中各字段的示例性说明，各字段的释义可参照前述相关介绍，在此不作赘述。
由上述表3和表4可知，在侧行链路中的SCI包括针对TxUE传输的时频资源等的指示信息，对RxUE反馈的时频资源等信息没有关联。本申请实施例中，通过复用标准协议SCI中格式及字段，无需新建字段，在SCI1-A及SCI2-A现有字段的基础上稍作修改，得到新定义的SCI1-B及SCI2-C，SCI1-B及SCI2-C指示RxUE反馈第二信号的预留时频资源等信息，从而保证重要消息的及时、成功的反馈，提升系统性能。同时，SCI1-B及SCI2-C没有新增字段，保证系统传输性能。
作为一个示例，第一终端设备在向第二终端设备发送第一信号时，如果需要让第二终端设备能够及时地、有保障地反馈第二信号，则可以为该第二信号预留时频资源，此时，第一终端设备可以向第二终端设备发送SCI1-B和SCI2-C，从而指示为第二终端设备反馈第二信号预留的时频资源，第二信号的反馈类型，以及反馈第二信号的调制编码等信息。这样，第一终端设备通过发送侧行链路控制信息SCI1-B和SCI2-C，为第二信号预留时频资源，从而保证第二信号的及时、成功地反馈，提升通信系统性能。
相应的，第二终端设备接收第一终端设备发送的第一控制信息和第二控制信息。
其中，第一控制信息可以包含第一字段或第二字段中的至少一个，该第一字段或第二字段中的至少一个指示第一控制信息的格式，该第一字段或第二字段中的至少一个指示第二控制信息的格式。
第一控制信息的格式至少包括第一格式a和第二格式a，其中，第一格式a指示第二终端设备反馈第二信号的时频资源，第二格式a指示第一终端设备发送数据信道的传输信息。第二控制信息的格式至少包括第三格式和第四格式，其中，第三格式指示第二终端设备反馈第二信号的冗余版本，第四格式指示第一终端设备发送数据信道的冗余版本。
示例性的，第二终端设备根据第一字段和/或第二字段确定第一控制信息的格式及第二控制信息的格式。若确定所接收的第一控制信息的格式为第一格式a，第二控制信息的格 式为第三格式，例如，第二终端设备所接收的为第一终端设备发送的SCI1-B和SCI2-C，则第二终端设备确定第一格式a及第二格式a中字段所指示的预览时频资源、调制编码等信息，并准备在预留的时频资源上反馈第一终端设备所期望的第二信号。
在一种可选实现方式中，第二终端设备根据第一格式a中所包括的指示时频资源的至少一个字段，确定反馈第二信号的时频资源，可选的，该时频资源满足第二终端设备针对第二信号的时间处理能力。例如，第二终端设备可以通过SCI1-B中的Frequency resource assignment字段确定反馈第二信号的频域资源，通过SCI1-B中的Time resource assignment字段确定反馈第二信号的时域资源。
在一种可选实现方式中，第二终端设备根据第三格式中所包括的指示第二信号的至少一个字段，确定第二信号的反馈类型。例如，第二终端设备可以通过SCI2-C中的CSI request确定第二信号的反馈类型。
在一种可选实现方式中，第二终端设备根据第一格式a中所包括的指示第二终端设备反馈第二信号时使用的调制编码及解调导频信息的至少一个字段，确定反馈第二信号时使用的调制编码及解调导频信息。例如，第二终端设备可以通过SCI1-B中的Modulation and coding scheme字段，确定反馈第二信号时使用的调制和编码方案；或者，通过SCI1-B中的Additional MCS table indicator字段确定反馈第二信号时使用的调制和编码方案表格；或者，通过SCI1-B中的DMRS pattern字段确定反馈第二信号时使用的导频图案；或者，通过SCI1-B中的Number of DMRS port字段确定反馈第二信号时的端口信息。
在一种可选实现方式中，第二终端设备根据第一格式a中所包括的指示第二终端设备反馈第二信号的周期的至少一个字段，确定反馈第二信号的周期。例如，第二终端设备可以通过SCI1-B中的Resource reservation period字段确定反馈第二信号的周期。
在一种可选实现方式中，第二终端设备根据第三格式中所包括的第一控制信息和第二控制信息的源标识的所有比特，及第一控制信息和第二控制信息的目的地标识的所有比特，从而确定第一控制信息和第二控制信息的源标识及目的地标识。例如，第二终端设备可以通过SCI2-C中Source ID字段中物理层L1和数据链路层L2的源标识确定SCI2-C的源标识，通过SCI2-C中Destination ID字段中物理层L1和数据链路层L2的目的地标识确定SCI2-C的目的地标识。
示例性的，第二终端设备通过第一控制信息和第二控制信息的源标识及目的地标识确定本次所传输的消息的归属，当第二终端设备所确定的目的地标识与第二终端设备的自身标识不同第二终端设备不使用上述时频资源，从而可以在预留的时频资源上进行避让，保证第二信号在该时频资源上及时、成功地反馈。可选的，第二终端设备可以根据时频资源的优先级确定是否在预留的时频资源上进行避让，从而保障优先级更高的数据成功传输，提高系统性能。
步骤1002，在第一控制信息为第一格式a时，第二控制信息为第三格式时，第二终端设备在上述时频资源上向第一终端设备反馈第二信号。
该步骤中，在第一控制信息为第一格式a时，第二控制信息为第三格式时，第二终端设备可以直接在上述步骤1001中所确定的预留时频资源上向第一终端设备反馈第二信号；保证了第二信号的及时、成功地反馈，提升了系统性能的；同时，第二终端设备无需通过信道竞争选择时频资源，也无需发送控制信息，节省了第二终端设备的功耗。
示例性的，第二终端设备可以在上述所确定的时频资源上，按照所确定的发送第二信号时所使用的调制编码及解调导频信息，反馈所需要反馈的第二信号内容，从而保证信道状态信息、辅助资源选择信息、定位测量信息、功率控制辅助信息等第二信号可以有效及时地反馈，提升系统性能。进一步地，第二终端设备还可以通过所确定的反馈该第二信号的周期，按照该周期及时反馈该第二信号，从而可以保障系统的有效运转。
作为一个示例，第二终端设备所接收为SCI1-B和SCI2-C时，第二终端设备可以根据SCI1-B中的Frequency resource assignment、Time resource assignment、CSI request、Modulation and coding scheme、Number of DMRS port、Resource reservation period等字段所确定的信息，反馈第二信号。
在一种可选实现方式中，在第一控制信息为第一格式a时，第二控制信息为第三格式时，第二终端设备可以反馈针对该第一控制信息和第二控制信息的HARQ，或者不反馈针对该第一控制信息和第二控制信息的HARQ。示例性的，反馈上述HARQ信息的方式包括：发送应答消息(Acknowledgement，ACK)或发送否定应答(Negative Acknowledgement，NACK)。
例如，第二终端设备所接收为SCI1-B和SCI2-C时，第二终端设备可以不反馈针对SCI1-B和SCI2-C的HARQ，也可以反馈针对SCI1-B和SCI2-C的HARQ。在第二终端设备反馈针对SCI1-B和SCI2-C的HARQ时，若接收失败，则在PSFCH上传输HARQ-NACK信息，其他情况下在PSFCH上不传输信息；或者，接收成功，则在PSFCH上传输HARQ-ACK信息，失败的话传输HARQ-NACK信息。
相应的，在第一控制信息为第一格式a，第二控制信息为第三格式时，第一终端设备在上述时频资源上接收第二终端设备反馈的第二信号。
该步骤中，在第一控制信息为第一格式a时，第二控制信息为第三格式时，第一终端设备可以直接在该时频资源上接收第二终端设备反馈的该第二信号，无需盲检该第二信号所在的时频资源，也无需检测控制信息，节省了第一终端设备的功耗。
作为一个示例，第一终端设备发送SCI1-B和SCI2-C后，可以在SCI1-B中的Frequency resource assignment字段及Time resource assignment字段指定的时域资源上接收第二终端设备反馈的第二信号。
在一种可选实现方式中，在第一控制信息为第一格式a时，第二控制信息为第三格式时，第一终端设备可以检测针对该第一控制信息和第二控制信息的HARQ，也可以不检测针对该第一控制信息和第二控制信息的HARQ。可选的，若第二终端设备反馈针对该第一控制信息和第二控制信息的HARQ，则第一终端设备可以接收该HARQ，从而提高第一终端设备和第二终端设备之间通信的可靠性。
例如，第一终端设备发送SCI1-B和SCI2-C后，第一终端设备可以不检测针对SCI1-B和SCI2-C的HARQ；也可以检测针对SCI1-B和SCI2-C的HARQ。可选的，若第二终端设备反馈针对SCI1-B和SCI2-C的HARQ时，则第一终端设备可以接收该HARQ。
本申请实施例中，第一控制信息包含第一字段或第二字段中的至少一个，该第一字段或第二字段中的至少一个指示该第一控制信息的格式，该第一字段或第二字段中的至少一个指示该第二控制信息的格式；第一控制信息的第一格式a指示第二终端设备反馈第二信号的时频资源，第二控制信息的第三格式指示第二终端设备反馈第二信号的冗余版本，这 样，通过为第二信号预留时频资源，保证第二信号的及时、成功地反馈，提升系统性能。
如图11为本申请提供的另一种第一终端设备与第二终端设备交互信号的流程示意图。
步骤1101，第一终端设备向第二终端设备发送第一控制信息、第二控制信息及数据信道(或数据信息)。
其中，第一控制信息指示第一终端设备发送数据信道的传输信息；其中，传输信息的内容可参照前文相关表述，在此不再赘述。示例性的，第一控制信息及第二控制信息为SCI，数据信道为PSSCH。可选的，第一控制信息可以为现有的一级SCI1，例如，可以为标准协议中SCI1-A；SCI1-A中所包含字段及各字段的释义可参见上述表3。
其中，第一控制信息可以包括指示第二控制信息的格式的至少一个字段；第二控制信息的格式至少包括第一格式b和第二格式b，第一格式b指示第二终端设备反馈第二信号的时频资源(即第二分配资源)；第二格式b指示第一终端设备发送数据信道的冗余版本；其中，第二信号、时频资源等的内容可以参照前文相关表述，在此不再赘述。可选的，第二格式b可以为现有的二级SCI2，例如，可以为标准协议中SCI2-A或SCI2-B，为了方便表述，本申请实施例中以第二格式b为标准协议中SCI2-A进行示例性说明，SCI2-A中所包含字段及各字段的释义可参见表4；第一格式b可以为一种新的二级SCI2，为了与标准协议中SCI2-A及SCI2-B区别，本申请实施例中将该新的二级SCI2定义为SCI2-D；其中，SCI2-D包含SCI2-A中的至少一个字段，并在此基础上，新增字段承载预留的时频资源等信息。
示例性的，第一控制信息可以通过一个字段指示第二控制信息的格式，该字段的不同取值可以指示第二控制信息的格式，例如，可以通过该字段中的1比特(bit)或者2比特表示第二控制信息的格式，例如，该2比特值为11(或10)时指示第二控制信息的格式为第一格式b，该2比特值为00(或01)时指示第二控制信息的格式为第二格式b。
作为一个示例，该字段可以为SCI1-A的字段Reserved，利用该字段Reserved中的2比特指示第二控制信息的格式，例如，该2比特值为00时指示第二控制信息为SCI2-A，该2比特值为11时指示第二控制信息为SCI2-D；或者，该字段可以为SCI1-A中的字段2nd-stage SCI format，利用该字段2nd-stage SCI format中的2比特指示第二控制信息的格式，例如，该2比特值为00时指示第二控制信息为SCI2-A，该2比特值为10时指示第二控制信息为SCI2-D。
该方式中，对标准协议中SCI格式SCI1-A中的Reserved字段或2nd-stage SCI format字段进行修改，利用SCI1-A中Reserved字段中的2比特指示第二控制信息的格式，或者利用2nd-stage SCI format中的2比特指示第二控制信息的格式，这样，复用标准协议中SCI格式的字段，不会额外增加PSCCH信令开销，保证系统传输性能。
下面对第二控制信息中可以包含的其他字段进行介绍：
在一种可选实现方式中，上述第一格式b可以包括：指示上述时频资源的至少一个字段。第一终端设备通过该至少一个字段为第二终端设备反馈第二信号预留时频资源，保证该第二信号可以在该时频资源的部分或全部上及时、成功地反馈。
该实现方式中，第一格式b中不同数量的字段指示为第二信号预留的时频资源的具体内容可以参照前文第一格式a中相关表述，在此不再赘述，需要说明的是，与第一格式a复用字段不同的是，第一格式b中字段为新增字段。
作为一个示例，SCI2-D中在SCI2-A基础上，新增Frequency resource assignment字段和Time resource assignment字段，SCI2-D中的这两个字段Frequency resource assignment字段和Time resource assignment字段用于指示为第二信号预留的时频资源，其中，Frequency resource assignment字段用于指示预留的频域资源，Time resource assignment字段用于指示预留的时域资源。
在一种可选实现方式中，考虑到第二终端设备针对第二信号的时间处理能力，第一终端设备为第二终端设备预留的时频资源满足第二终端设备针对第二信号的时间处理能力，从而可以保证第二终端设备有时间处理第二信号，并将处理后的第二信号及时、成功地反馈，保障系统的有效运转。该实现方式中关于时间处理能力的具体内容，可参照前文的相关表述，在此不再赘述。
在一种可选实现方式中，上述第一格式b还可以包括：用于指示第二信号的反馈类型的至少一个字段，这样，第一终端设备通过该至少一个字段指示第二终端设备需要反馈的第二信号类型，从而保证信道状态信息、辅助资源选择信息、定位测量信息、功率控制辅助信息等第二信号可以有效及时地反馈，提升系统性能。
该实现方式中第一格式b中不同数量的字段指示为第二信号类型的具体内容可以参照前文第一格式a中相关表述，在此不再赘述。
作为一个示例，SCI2-D复用SCI2-A中的CSI request(信道状态信息请求)字段，在SCI2-A中的CSI request字段占用1bit，在SCI2-D中CSI request字段由原来的1bit，扩展至X bits，其中，X为正整数；该X比特的不同取值用于指示第二信号不同的类型；可选的，若第二信号包含四种类型，则X可以为2。这样，通过复用SCI2-A中的CSI request字段，从而保证系统传输性能。
在一种可选实现方式中，上述第一格式b还可以包括：指示第二终端设备反馈第二信号的周期的至少一个字段。这样，在第一终端设备期望第二终端设备周期性地反馈第二信号时，第一终端设备可以通过该至少一个字段指示第二终端设备按照该周期反馈第二信号，从而可以保障系统的有效运转。
该实现方式中，第一格式b中指示的反馈第二信号的周期具体内容可以参照前文第一格式a中相关表述，在此不再赘述，需要说明的是，与第一格式a复用字段不同的是，第一格式b中字段为新增字段。
作为一个示例，SCI2-D在SCI2-A基础上，新增Resource reservation period字段，在SCI2-D中Resource reservation period字段指示第二终端设备反馈第二信号的周期。
需要说明的是，除上述作为示例性的说明的字段之外，第一控制信息和第二控制信息中还可以包括其他字段，本申请实施例对此不作限定。
举例来说，以第一控制信息为SCI1-A，第一格式b为SCI2-D，第二格式b为SCI2-A为例；其中，SCI1-A中字段的释义可参照上述表3，在此不作赘述，其中Reserved字段中保留2比特值默认为00，表明该SCI1为SCI1-A，或者，可以利用Reserved字段中的1比特指示第二控制信息的格式；SCI2-D可以包含SCI2-A中的全部字段，并在此基础上，新增若干字段，如表5示例性示出的SCI2-A与SCI2-D字段释义对比表。
表5
Figure PCTCN2021134109-appb-000005
如表5所示，HARQ process number字段，在SCI2-A和SCI2-D中均指示第一终端设备传输的HARQ处理进程号。New data indicator字段，在SCI2-A和SCI2-D中均指示第一终端设备传输的NDI信息。Redundancy version字段，在SCI2-A和SCI2-D中均指示第一终端设备传输的冗余版本号。Source ID字段，在SCI2-A和SCI2-D中均指示第一终端设备传输对应的源ID。Destination ID字段，在SCI2-A和SCI2-D中均指示第一终端设备传输对应的目的ID。HARQ feedback enabled/disabled indicator字段，在SCI2-A和SCI2-D中均指示第一终端设备传输关联的HARQ是否反馈的使能。Cast type indicator字段，在SCI2-A和SCI2-D中均指示第一终端设备传输的Cast类型。CSI request字段，在SCI2-A中指示第一终端设备触发第二终端设备反馈的CSI，在SCI2-D中指示第一终端设备指示第二终端设备反馈第二信号的反馈类型。此外，SCI2-D中还包括：新增的Frequency resource assignment字段，指示预留的频域资源；新增的Time resource assignment字段，指示预留的时域资源；新增的Resource reservation period字段，指示第二终端设备反馈第二信号的周期。
由上述表5可知，在侧行链路中的SCI包括针对TxUE传输的时频资源等的指示信息，对RxUE反馈的时频资源等信息没有关联。本申请实施例中在标准协议SCI中格式及字段的基础上，新增字段承载预留的时频资源等信息，将SCI当作类似DL Grant(下行授权) 和UL Grant(上行授权)综合使用，在SCI2-A现有字段的基础上稍作修改，得到新定义的SCI2-D，SCI2-D指示RxUE反馈第二信号的预留时频资源等信息，保证重要消息的及时、成功的反馈，提升系统性能。同时，SCI2-D相对于现有的SCI2-A，仅对一个字段重新释义，其他字段释义不变，从而尽量少的改变现有协议中SCI2-A的字段释义，提高新定义的SCI2-D的适用性。
作为一个示例，第一终端设备在向第二终端设备发送消息时，如果需要让第二终端设备能够及时地、有保障的反馈第二信号，则可以为该第二信号预留时频资源，此时，第一终端设备可以向第二终端设备发送SCI1-A、SCI2-D及PSSCH，从而通过SCI1-A指示该PSSCH的传输信息，通过SCI2-D指示为第二终端设备反馈第二信号预留的时频资源，第二信号的反馈类型等信息，通过SCI1-A提供调制编码等信息。这样，第一终端设备通过发送侧行链路控制信息SCI2-D、SCI1-A及PSSCH，为第二信号预留时频资源，从而保证第二信号的及时、成功地反馈，提升SL-U通信系统性能。
相应的，第二终端设备接收第一终端设备发送的第一控制信息、第二控制信息及数据信道。
其中，第一控制信息指示第一终端设备发送数据信道的传输信息；第一控制信息包括指示第二控制信息的格式的至少一个字段；第二控制信息的格式至少包括第一格式b和第二格式b，第一格式b指示第二终端设备反馈第二信号的时频资源；第二格式b指示第一终端设备发送数据信道的冗余版本。
示例性的，第二终端设备根据第一控制信息中指示第二控制信息格式的字段确定第二控制信息的格式；若确定所接收的第二控制信息的格式为第一格式b，例如，第二终端设备所接收的第二控制信息为SCI2-D；则第二终端设备确定第一格式b中字段所指示的预览时频资源、反馈指示消息的周期等信息，并准备在预留的时频资源上反馈第一终端设备所期望的第二信号。
在一种可选实现方式中，第二终端设备根据上述第一格式b中所包括的指示上述时频资源的至少一个字段，确定反馈第二信号的时频资源，可选的，该时频资源满足第二终端设备针对第二信号的时间处理能力。例如，第二终端设备可以通过SCI2-D中的Frequency resource assignment字段确定反馈第二信号的频域资源，通过SCI2-D中的Time resource assignment字段确定反馈第二信号的时域资源。
在一种可选实现方式中，第二终端设备还可以根据上述时频资源的信号干扰情况，将该时频资源中干扰较弱或者无干扰的部分作为反馈第二信号的时频资源，从而保证传输性能，和/或，第二终端设备可以根据所要反馈的第二信号的数据量大小，将该时频资源中的一部分作为反馈第二信号的时频资源，从而节省开销。
在一种可选实现方式中，第二终端设备根据上述第一格式b中所包括的指示第二信号的至少一个字段，确定第二信号的反馈类型。例如，第二终端设备可以通过SCI2-D中的CSI request确定第二信号的反馈类型。
在一种可选实现方式中，第二终端设备根据上述第一格式b中所包括的指示第二终端设备反馈第二信号的周期的至少一个字段；确定反馈第二信号的周期。例如，第二终端设备可以通过SCI2-D中的Resource reservation period字段确定反馈第二信号的周期。
在一种可选实现方式中，第二终端设备根据上述第一格式b中Source ID字段及Destination ID字段，以及数据信道中所包含的数据链路层L2的源标识及目的地标识，确 定第一控制信息和第二控制信息的源标识及目的地标识。当第二终端设备所确定的目的地标识与第二终端设备的自身标识不同时，第二终端设备不使用上述时频资源，从而可以在预留的时频资源上进行避让，保证第二信号在该时频资源上及时、成功地反馈。可选的，第二终端设备可以根据时频资源的优先级确定是否在预留的时频资源上进行避让，从而保障优先级更高的数据成功传输，提高系统性能。
步骤1102，在第二控制信息为第一格式b时，第二终端设备向第一终端设备发送第二信号、指示第二终端设备发送第二信号的传输信息的控制信息、及指示第二终端设备发送第二信号的冗余版本的控制信息；其中，该第二信号占用部分或全部该预留的时频资源。
该步骤中，在第二控制信息为第一格式b时，第二终端设备可以直接在上述步骤1101中所确定的预留时频资源上向第一终端设备反馈第二信号，从而保证了第二信号的及时、成功地反馈，提升了系统性能。同时，第二终端设备无需通过信道竞争选择时频资源，从而节省了第二终端设备的功耗。
示例性的，第二终端设备可以在上述所确定的时频资源上，复用第一控制信息所指示的调制编码及解调导频信息，反馈所需要反馈的第二信号内容，从而保证信道状态信息、辅助资源选择信息、定位测量信息、功率控制辅助信息等第二信号可以有效及时地反馈，提升系统性能。进一步地，第二终端设备还可以通过所确定的反馈该第二信号的周期，按照该周期及时反馈该第二信号，从而可以保障系统的有效运转。
作为一个示例，第二终端设备所接收为SCI1-A和SCI2-D时，第二终端设备可以根据SCI2-D中的Frequency resource assignment、Time resource assignment、CSI request、Resource reservation period等字段所确定的信息以及SCI1-A中Modulation and coding scheme、Number of DMRS port等字段所确定的信息，反馈第二信号。
同时，第二终端设备还可以反馈针对第一终端设备发送的数据信道的HARQ。示例性的，反馈上述HARQ信息的方式包括：ACK或NACK。
例如，第二终端设备所接收为SCI1-A和SCI2-D及数据信道时，第二终端设备可以反馈针对该数据信道的HARQ。若第二终端设备接收该数据信道失败，则在PSFCH上传输HARQ-NACK信息，其他情况下在PSFCH上不传输信息；或者，第二接收该数据信道成功，则在PSFCH上传输HARQ-ACK信息，接收该数据信道失败，则在PSFCH上传输HARQ-NACK信息。
相应的，在第二控制信息为第一格式b时，第一终端设备接收第二终端设备发送的该第二信号、指示第二终端设备发送该第二信号的传输信息的控制信息、及指示第二终端设备发送该第二信号的冗余版本的控制信息；其中，该第二信号占用部分或全部该预留的时频资源。
该步骤中，在第二控制信息为第一格式b时，第一终端设备可以直接在该时频资源上接收第二终端设备反馈的该第二信号，从而及时获取所期望的第二信号。
第一终端设备发送SCI1-A和SCI2-D后，可以在SCI2-D中的Frequency resource assignment字段及Time resource assignment字段指定的时域资源上接收第二终端设备反馈的第二信号。
同时，第一终端设备还可以接收第二终端设备反馈的针对数据信道的HARQ。从而提 高第一终端设备和第二终端设备之间通信的可靠性。示例性的，反馈上述HARQ信息的方式包括：ACK或NACK。
例如，若第一终端设备接收到第二终端设备针对数据信道反馈的HARQ-NACK信息，则第一终端设备可以确定第二终端设备接收该数据信道失败，进行重发，若为未接收到第二终端设备针对数据信道反馈的HARQ信息，则第一终端设备可以确定第二终端设备接收该数据信道成功；或者，若第一终端设备接收到第二终端设备针对数据信道反馈的HARQ-ACK信息，则第一终端设备可以确定第二终端设备接收该数据信道成功，若第一终端设备接收到第二终端设备针对数据信道反馈的HARQ-NACK信息，则第一终端设备可以确定第二终端设备接收该数据信道失败，进行重发。
本申请实施例中，第一控制信息指示第一终端设备发送数据信道的传输信息；第一控制信息包括指示第二控制信息的格式的至少一个字段；第二控制信息的第一格式b用于指示第二终端设备反馈第二信号的时频资源；这样，通过为第二信号预留时频资源，从而保证第二信号的及时、成功地反馈，提升系统性能。
基于上述内容和相同构思，如图12为本申请示例性提供的一种资源分配的示意图，如图12中，SCI_U和SCI_D均可以是新定义的二级SCI2，其中，SCI_U是第一终端设备向第一装置发送的二级SCI2，该SCI_U中包括BSR_Tx和BSR_Rx。SCI_D是第一装置向第一终端设备发送的二级SCI2，该SCI_D中包括第一指示信息和第二指示信息，第一指示信息用于指示第一分配资源(如图12中采用Tx资源表示)，第二指示信息用于指示第二分配资源(如图12中采用Rx资源表示)。示例性的，第一终端设备先向第一装置发送SCI_U，第一装置接收SCI_U。然后第一装置根据SCI_U生成SCI_D，向第一终端设备发送SCI_D，其中SCI_D中指示Tx资源和Rx资源。相应的，第一终端设备在Tx资源上向第二终端设备发送第一信号，第二终端设备在Rx资源上向第二终端设备发送第二信号。
基于上述内容和相同构思，如图13为本申请示例性提供的另一种资源分配的示意图，如图13中(a)为辅助信息反馈场景中，资源类型可以是辅助信息类型，第一信号具体可以零功率参考信号，用来测量相邻小组或者异系统干扰，第二信号具体是辅助资源选择信息，辅助资源选择信息包括资源标识、RSRP、SINR。如图13中(b)为信道状态信息测量场景中，资源类型可以是3I类型，第一信号具体是CSI-RS，第二信号具体是信道状态信息，具体可以是3I信息，3I信息具体包括PMI、CQI、RI。如图13中(c)为功率控制信息反馈场景中，资源类型可以是功率控制类型，第一信号具体是DMRS，第二信号具体是功率控制辅助信息，功率控制辅助信息具体可以包括信号功率和干扰功率。
可以理解的是，上述各个方法实施例中，由终端设备实现的方法和操作，也可以由可用于终端设备的部件(例如芯片或者电路)实现，由网络设备实现的方法和操作，也可以由可用于网络设备的部件(例如芯片或者电路)实现。
上述本申请提供的实施例中，分别从各个设备之间交互的角度对本申请实施例提供的方法进行了介绍。为了实现上述本申请实施例提供的方法中的各功能，终端设备与网络设备可以包括硬件结构和/或软件模块，以硬件结构、软件模块、或硬件结构加软件模块的形式来实现上述各功能。上述各功能中的某个功能以硬件结构、软件模块、还是硬件结构加软件模块的方式来执行，取决于技术方案的特定应用和设计约束条件。
本申请实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。另外，在本申请各个实施例中的各功能模块可以集成在一个处理器中，也可以是单独物理存在，也可以两个或两个以上模块集成在一个模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。
基于上述内容和相同构思，图14和图15为本申请的提供的可能的通信装置的结构示意图。这些通信装置可以用于实现上述方法实施例中第一终端设备或第一装置的功能，因此也能实现上述方法实施例所具备的有益效果。
在本申请中，该通信装置可以是如图1所示的终端设备1或网络设备，或者该通信装置可以是如图3所示的终端设备1或终端设备0，当然该通信装置还可以是应用于终端设备或网络设备的模块(如芯片)。
如图14所示，该通信装置1400包括处理模块1401和收发模块1402。通信装置1400用于实现上述方法实施例中第一终端设备或第一装置的功能。
当通信装置1400用于实现上述方法实施例中第一终端设备的功能时：
一种可选实现方式中，处理模块1401用于控制收发模块1402向第一装置发送资源请求，资源请求用于请求第一资源和第二资源，第一资源用于通信装置1400向第二终端设备发送第一信号，第二资源用于通信装置1400从第二终端设备接收第二信号；处理模块1401还用于控制收发模块1402接收第一装置响应于资源请求的资源响应。
一种可选实现方式中，第一装置是组头终端设备或网络设备。
一种可选实现方式中，资源请求包括第一信号中第一数据的数据量，和/或，第二信号中第二数据的数据量。
一种可选实现方式中，资源请求中包括第一信号的类型，和/或，第二信号的反馈类型。
一种可选实现方式中，通信装置1400包括有预配置信息，预配置信息包括多个索引信息，每个索引信息对应有一个预设资源；资源请求中包括第一索引信息，第一索引信息是多个索引信息中的一个，第一资源是第一索引信息对应的预设资源。
一种可选实现方式中，预配置信息还包括多个类型，每个类型对应有至少一个索引信息；资源请求中还包括第一信号的类型，第一信号的类型是多个类型中一个，第一索引信息是第一信号的类型对应的至少一个索引信息中一个。
一种可选实现方式中，资源请求中还包括第二信号的反馈信息，第二信号的反馈信息包括第二信号的反馈类型和第二信号的反馈类型对应的反馈元素。
一种可选实现方式中，资源请求还包括反馈时间信息，反馈时间信息用于指示承载第二信号的时域资源和/或周期资源。
一种可选实现方式中，处理模块1401还用于控制收发模块1402向第二终端设备发送控制信息，其中，控制信息中包括通信装置1400从资源响应中得到的第一指示信息和/或第二指示信息，第一指示信息指示通信装置1400发送第一信号的资源，第二指示信息指示通信装置1400接收第二信号的资源。
一种可选实现方式中，控制信息中还包括预设反馈类型，第二信号的反馈类型与控制信息中预设反馈类型相同。
一种可选实现方式中，处理模块1401还用于根据资源响应中第一指示信息，控制收发模块1402向第二终端设备发送第一信号，和/或，控制收发模块1402根据资源响应中第二指示信息，接收来自第二终端设备的第二信号。
一种可选实现方式中，第二信号是第二终端设备响应于第一信号，向通信装置1400发送的。
一种可选实现方式中，反馈类型至少包括信道状态类型、定位信息类型、辅助信息类型、功率控制类型中的一项或多项；其中，信道状态类型对应的反馈元素至少包括CQI、RI、PMI中的一项或多项；定位信息类型对应的反馈元素至少包括RTT、AOA、AoD中的一项或多项；辅助信息类型对应的反馈元素至少包括资源标识、RSRP、SINR中一项或多项；功率控制类型对应的反馈元素至少包括信号功率和/或干扰功率。
当通信装置1400用于实现上述方法实施例中第一装置的功能时：
一种可选实现方式中，处理模块1401用于控制收发模块1402接收来自第一终端设备的资源请求，资源请求用于请求第一资源和第二资源，第一资源是第一终端设备向第二终端设备发送第一信号的资源，第二资源是第一终端设备从第二终端设备接收第二信号的资源；处理模块1401还用于响应于资源请求，控制收发模块1402向第一终端设备发送资源响应。
一种可选实现方式中，通信装置1400是组头终端设备或网络设备。
一种可选实现方式中，资源请求包括第一信号中第一数据的数据量，和/或，第二信号中第二数据的数据量。
一种可选实现方式中，资源请求中包括第一信号的类型，和/或，第二信号的反馈类型。
一种可选实现方式中，通信装置1400包括有预配置信息，预配置信息包括多个索引信息，每个索引信息对应有一个预设资源；资源请求中包括第一索引信息，第一索引信息是多个索引信息中的一个，第一资源是第一索引信息对应的预设资源。
一种可选实现方式中，预配置信息还包括多个类型，每个类型对应有至少一个索引信息；资源请求中还包括第一信号的类型，第一信号的类型是多个类型中一个，第一索引信息是第一信号的类型对应的至少一个索引信息中一个。
一种可选实现方式中，资源请求中还包括第二信号的反馈信息，第二信号的反馈信息包括第二信号的反馈类型和第二信号的反馈类型对应的反馈元素。
一种可选实现方式中，资源请求还包括反馈时间信息，反馈时间信息用于指示承载第二信号的时域资源和/或周期资源。
一种可选实现方式中，处理模块1401具体用于根据资源请求，生成资源响应，资源响应包括第一指示信息和第二指示信息，第一指示信息指示第一终端设备发送第一信号的资源，第二指示信息指示第一终端设备接收第二信号的资源；控制收发模块1402向第一终端设备发送资源响应。
一种可选实现方式中，反馈类型至少包括信道状态类型、定位信息类型、辅助信息类型、功率控制类型中的一项或多项；其中，信道状态类型对应的反馈元素至少包括CQI、RI、PMI中的一项或多项；定位信息类型对应的反馈元素至少包括RTT、AOA、AoD中的一项或多项；辅助信息类型对应的反馈元素至少包括资源标识、RSRP、SINR中一项或多项；功率控制类型对应的反馈元素至少包括信号功率和/或干扰功率。
如图15所示为本申请实施例提供的装置1500，图15所示的装置可以为图14所示的装置的一种硬件电路的实现方式。该装置可适用于前面所示出的流程图中，执行上述方法 实施例中第一终端设备或者第二终端设备的功能。
为了便于说明，图15仅示出了该装置的主要部件。
图15所示的装置1500包括通信接口1510、处理器1520和存储器1530，其中存储器1530用于存储程序指令和/或数据。处理器1520可能和存储器1530协同操作。处理器1520可能执行存储器1530中存储的程序指令。存储器1530中存储的指令或程序被执行时，该处理器1520用于执行上述实施例中处理模块1401执行的操作，通信接口1510用于执行上述实施例中收发模块1402执行的操作。
存储器1530和处理器1520耦合。本申请实施例中的耦合是装置、单元或模块之间的间接耦合或通信连接，可以是电性，机械或其它的形式，用于装置、单元或模块之间的信息交互。所述存储器1530中的至少一个可以包括于处理器1520中。
在本申请实施例中，通信接口可以是收发器、电路、总线、模块或其它类型的通信接口。在本申请实施例中，通信接口为收发器时，收发器可以包括独立的接收器、独立的发射器；也可以集成收发功能的收发器、或者是通信接口。
装置1500还可以包括通信线路1540。其中，通信接口1510、处理器1520以及存储器1530可以通过通信线路1540相互连接；通信线路1540可以是外设部件互连标准(peripheral component interconnect，简称PCI)总线或扩展工业标准结构(extended industry standard architecture，简称EISA)总线等。所述通信线路1540可以分为地址总线、数据总线、控制总线等。为便于表示，图15中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
基于上述内容和相同构思，本申请实施例提供一种芯片系统，包括：处理器，所述处理器与存储器耦合，所述存储器用于存储程序或指令，当所述程序或指令被所述处理器执行时，使得该芯片系统实现上述方法实施例中任一种的方法。
可选地，该芯片系统还包括接口电路，该接口电路用于交互代码指令至所述处理器。
可选地，该芯片系统中的处理器可以为一个或多个，该处理器可以通过硬件实现也可以通过软件实现。当通过硬件实现时，该处理器可以是逻辑电路、集成电路等。当通过软件实现时，该处理器可以是一个通用处理器，通过读取存储器中存储的软件代码来实现。
可选地，该芯片系统中的存储器也可以为一个或多个。该存储器可以与处理器集成在一起，也可以和处理器分离设置。示例性的，存储器可以是非瞬时性处理器，例如只读存储器ROM，其可以与处理器集成在同一块芯片上，也可以分别设置在不同的芯片上。
基于上述内容和相同构思，本申请实施例提供一种计算机可读存储介质，其上存储有计算机程序或指令，当该计算机程序或指令被执行时，使得计算机执行上述方法实施例中任一种的方法。
基于上述内容和相同构思，本申请实施例提供一种计算机程序产品，当计算机读取并执行所述计算机程序产品时，使得计算机执行上述方法实施例中任一种的方法。
基于上述内容和相同构思，本申请实施例提供一种通信系统，该通信系统包括上述方法实施例中的第一终端设备、第二终端设备和第一装置。
可以理解的是，在本申请的实施例中涉及的各种数字编号仅为描述方便进行的区分，并不用来限制本申请的实施例的范围。上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的保护范 围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (28)

  1. 一种资源分配方法，其特征在于，包括：
    第一终端设备向第一装置发送资源请求，所述资源请求用于请求第一资源和第二资源，所述第一资源用于所述第一终端设备向第二终端设备发送第一信号，所述第二资源用于所述第一终端设备从所述第二终端设备接收第二信号；
    所述第一终端设备接收所述第一装置响应于所述资源请求的资源响应。
  2. 如权利要求1所述的方法，其特征在于，所述第一装置是组头终端设备或网络设备。
  3. 如权利要求1或2所述的方法，其特征在于，所述资源请求包括所述第一信号中第一数据的数据量，和/或，所述第二信号中第二数据的数据量。
  4. 如权利要求1至3任一项所述的方法，其特征在于，所述资源请求中包括所述第一信号的类型，和/或，所述第二信号的反馈类型。
  5. 如权利要求1或2所述的方法，其特征在于，所述第一终端设备包括有预配置信息，所述预配置信息包括多个索引信息，每个索引信息对应有一个预设资源；
    所述资源请求中包括第一索引信息，所述第一索引信息是所述多个索引信息中的一个，所述第一资源是所述第一索引信息对应的预设资源。
  6. 如权利要求5所述的方法，其特征在于，所述预配置信息还包括多个类型，每个类型对应有至少一个索引信息；
    所述资源请求中还包括所述第一信号的类型，所述第一信号的类型是所述多个类型中一个，所述第一索引信息是所述第一信号的类型对应的至少一个索引信息中一个。
  7. 如权利要求5或6所述的方法，其特征在于，所述资源请求中还包括所述第二信号的反馈信息，所述第二信号的反馈信息包括所述第二信号的反馈类型和所述第二信号的反馈类型对应的反馈元素。
  8. 如权利要求1至7任一项所述的方法，其特征在于，所述资源请求还包括反馈时间信息，所述反馈时间信息用于指示承载所述第二信号的时域资源和/或周期资源。
  9. 如权利要求1至8任一项所述的方法，其特征在于，还包括：
    所述第一终端设备向所述第二终端设备发送控制信息，其中，所述控制信息中包括所述第一终端设备从所述资源响应中得到的第一指示信息和/或第二指示信息，所述第一指示信息指示所述第一终端设备发送所述第一信号的资源，所述第二指示信息指示所述第一终端设备接收所述第二信号的资源。
  10. 如权利要求9所述的方法，其特征在于，所述控制信息中还包括预设反馈类型，所述第二信号的反馈类型与所述控制信息中所述预设反馈类型相同。
  11. 如权利要求1至10任一项所述的方法，其特征在于，还包括：
    所述第一终端设备根据所述资源响应中第一指示信息，向所述第二终端设备发送所述第一信号，和/或，所述第一终端设备根据所述资源响应中第二指示信息，接收来自所述第二终端设备的第二信号。
  12. 如权利要求1至11任一项所述的方法，其特征在于，所述第二信号是所述第二终端设备响应于所述第一信号，向所述第一终端设备发送的。
  13. 如权利要求1至12任一项的方法，其特征在于，所述反馈类型至少包括信道状态类型、定位信息类型、辅助信息类型、功率控制类型中的一项或多项；其中，
    所述信道状态类型对应的反馈元素至少包括信道质量指示CQI、秩指示RI、预编码矩阵指示PMI中的一项或多项；
    所述定位信息类型对应的反馈元素至少包括往返时间RTT、到达角度AOA、离开角AoD中的一项或多项；
    所述辅助信息类型对应的反馈元素至少包括资源标识、参考信号接收功率RSRP、信号与干扰加噪声比SINR中的一项或多项；
    所述功率控制类型对应的反馈元素至少包括信号功率和/或干扰功率。
  14. 一种资源分配方法，其特征在于，包括：
    第一装置接收来自第一终端设备的资源请求，所述资源请求用于请求第一资源和第二资源，所述第一资源用于所述第一终端设备向第二终端设备发送第一信号，所述第二资源用于所述第一终端设备从所述第二终端设备接收第二信号；
    第一装置响应于所述资源请求，向所述第一终端设备发送资源响应。
  15. 如权利要求14所述的方法，其特征在于，所述第一装置是组头终端设备或网络设备。
  16. 如权利要求14或15所述的方法，其特征在于，所述资源请求包括所述第一信号中第一数据的数据量，和/或，所述第二信号中第二数据的数据量。
  17. 如权利要求14至16任一项所述的方法，其特征在于，所述资源请求中包括所述第一信号的类型，和/或，所述第二信号的反馈类型。
  18. 如权利要求14或15所述的方法，其特征在于，所述第一装置包括有预配置信息，所述预配置信息包括多个索引信息，每个索引信息对应有一个预设资源；
    所述资源请求中包括第一索引信息，所述第一索引信息是所述多个索引信息中的一个，所述第一资源是所述第一索引信息对应的预设资源。
  19. 如权利要求18所述的方法，其特征在于，所述预配置信息还包括多个类型，每个类型对应有至少一个索引信息；
    所述资源请求中还包括所述第一信号的类型，所述第一信号的类型是所述多个类型中一个，所述第一索引信息是所述第一信号的类型对应的至少一个索引信息中一个。
  20. 如权利要求18或19所述的方法，其特征在于，所述资源请求中还包括所述第二信号的反馈信息，所述第二信号的反馈信息包括所述第二信号的反馈类型和所述第二信号的反馈类型对应的反馈元素。
  21. 如权利要求14至20任一项所述的方法，其特征在于，所述资源请求还包括反馈时间信息，所述反馈时间信息用于指示承载所述第二信号的时域资源和/或周期资源。
  22. 如权利要求14至21任一项所述的方法，其特征在于，所述第一装置响应于所述资源请求，向所述第一终端设备发送资源响应，包括：
    所述第一装置根据所述资源请求，生成所述资源响应，所述资源响应包括第一指示信息和第二指示信息，所述第一指示信息指示所述第一终端设备发送所述第一信号的资源，所述第二指示信息指示所述第一终端设备接收所述第二信号的资源；
    所述第一装置向所述第一终端设备发送所述资源响应。
  23. 如权利要求14至22任一项所述的方法，其特征在于，所述反馈类型至少包括信道状态类型、定位信息类型、辅助信息类型、功率控制类型中的一项或多项；其中，
    所述信道状态类型对应的反馈元素至少包括信道质量指示CQI、秩指示RI、预编码矩阵指示PMI中的一项或多项；
    所述定位信息类型对应的反馈元素至少包括往返时间RTT、到达角度AOA、离开角AoD中的一项或多项；
    所述辅助信息类型对应的反馈元素至少包括资源标识、参考信号接收功率RSRP、信号与干扰加噪声比SINR中的一项或多项；
    所述功率控制类型对应的反馈元素至少包括信号功率和/或干扰功率。
  24. 一种通信装置，其特征在于，包括用于执行如权利要求1至13中任一项所述的方法的模块、或包括用于执行14至23中的任一项所述方法的模块。
  25. 一种通信装置，其特征在于，包括处理器，所述处理器通过执行计算机程序，以实现如权利要求1至13任一项所述的方法、或实现如权利要求14至23中任一项所述的方法。
  26. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储有计算机程序或指令，当所述计算机程序被通信装置执行时，实现如权利要求1至13任一项所述的方法、或用于实现如权利要求14至23中任一项所述的方法。
  27. 一种芯片，其特征在于，包括至少一个处理器和存储器；
    所述处理器，用于存储计算机程序；
    所述至少一个处理器用于执行所述计算机程序，以实现如权利要求1至13任一项所述的方法、或用于实现如权利要求14至23中任一项所述的方法。
  28. 一种通信系统，其特征在于，包括第一终端设备、第二终端设备和第一装置；所述第一终端设备用于执行如权利要求1至13中任一项所述的方法；所述第一装置用于执行如权利要求14至23中任一项所述的方法。
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NEC: "D2D Discovery Resource Allocation under Network Coverage", 3GPP DRAFT; R1-140494_D2D_DISCOVERY_RESOURCE_ALLOCATION, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Prague, Czech Republic; 20140210 - 20140214, 9 February 2014 (2014-02-09), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP050736027 *
See also references of EP4247084A4 *

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