CN112583554A

CN112583554A - Communication method, device and system

Info

Publication number: CN112583554A
Application number: CN201910937252.XA
Authority: CN
Inventors: 刘云; 王键
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-09-29
Filing date: 2019-09-29
Publication date: 2021-03-30
Anticipated expiration: 2039-09-29
Also published as: WO2021057761A1; CN112583554B

Abstract

The application provides a communication method, a device and a system, wherein the method comprises the following steps: respectively receiving data sent by second terminal equipment through n physical direct link shared channels PSSCH, wherein n is 2,3 or 4; according to the received data, determining target frequency domain resources for feeding back first information from a plurality of physical direct connection link feedback channel PSFCH frequency domain resources corresponding to the n PSSCHs; and sending the first information to the second terminal equipment through a PSFCH on the target frequency domain resource, wherein the first information is used for indicating the number of PSSCH carrying data received by the first terminal equipment. The communication method, the communication device and the communication system can avoid the phenomenon of demodulation errors caused by the fact that the first terminal equipment does not recognize data transmitted on a certain PSSCH or certain PSSCHs, and therefore the accuracy of data transmission can be improved.

Description

Communication method, device and system

Technical Field

The embodiment of the application relates to the technical field of communication, in particular to a communication method, device and system.

Background

Hybrid Automatic Repeat reQuest (HARQ) is a technology formed by combining Forward Error Correction (FEC) coding and Automatic Repeat reQuest (ARQ). For HARQ Feedback information of a Physical downlink Shared Channel (pscch), the HARQ Feedback information is generally transmitted by a Physical downlink Feedback Channel (PSFCH).

In the prior art, the PSFCH feedback resources appear in N slot (slots) cycles, and the value of N is currently 1,2, and 4. Thus, for a PSSCH that occurs at slot n, the corresponding PSFCH occurs at slot n + a. Due to the insufficient resources of the PSFCH, there is a case of multiplexing the PSFCH resources, that is, HARQ feedback information of a plurality of PSSCHs is fed back through one PSFCH resource. For example: the terminal a sends data to the terminal B through the PSSCH for multiple times, and if the terminal B does not have enough power to reply HARQ feedback information of multiple PSSCHs at the same time, the terminal B can only reply through one PSFCH, and at this time, the terminal B needs to perform an and operation between data carrying PSSCHs, and transmit the operation result. Such as: the decoding results of terminal B are correct (1) and error (0) for two data blocks carried by the first psch, and the decoding results of terminal B are error (0) and error (0) for two data blocks carried by the second psch, and the bit-wise and result of both is error (0) and error (0), at this time, the two bits carried by the PSFCH are the above-mentioned and result, i.e., {0,0 }.

However, in the prior art, when the terminal device at the receiving end does not recognize the data block carried on a certain PSSCH, the terminal device at the receiving end may perform feedback according to the decoding result of the data block received on the other PSSCHs, which may cause the terminal device at the receiving end to feed back information to the terminal device at the transmitting end inaccurately, thereby causing data transmission errors.

Disclosure of Invention

Embodiments of the present application provide a communication method, apparatus, and system, which can avoid a phenomenon of demodulation error caused by that a first terminal device does not recognize data transmitted on a certain PSSCH or some PSSCHs, so as to improve accuracy of data transmission.

In a first aspect, an embodiment of the present application provides a communication method, which is applied to a first terminal device, and the method includes:

respectively receiving data sent by second terminal equipment through n physical direct link shared channels PSSCH, wherein n is 2,3 or 4;

according to the received data, determining target frequency domain resources for feeding back first information from a plurality of PSFCH frequency domain resources corresponding to the n PSSCHs;

and sending first information to the second terminal equipment through the PSFCH on the target frequency domain resource, wherein the first information is used for indicating the number of PSSCH carrying data received by the first terminal equipment.

In the scheme, after receiving the data sent by the second terminal device, the first terminal device can feed back the number of PSSCH carrying the data received by the first terminal device to the second terminal device through the target frequency domain resource, so that the phenomenon of demodulation error caused by that the first terminal device does not recognize the data transmitted on a certain PSSCH or on certain PSSCH can be avoided, and the accuracy of data transmission can be improved.

In one possible implementation manner, the sending, on the target frequency domain resource, the first information to the second terminal device through the PSFCH includes:

determining a target sequence group for feeding back first information from at least two sequence groups according to received data;

and on the target frequency domain resource, the first information is sent to the second terminal equipment through the PSFCH by using the target sequence group.

In the scheme, after receiving the data sent by the second terminal device, the first terminal device may use the target frequency domain resource and the target sequence group to feed back the number of the PSSCHs carrying the data received by the first terminal device to the second terminal device, so that a phenomenon of demodulation errors caused by the fact that the first terminal device does not recognize the data transmitted on a certain PSSCH or certain PSSCHs can be avoided, and accuracy of data transmission can be improved.

In one possible implementation, the first information includes 2-bit information; when the first bit information in the 2-bit information is 0, the target sequence group is a first sequence group in at least two sequence groups, and when the first bit information is 1, the target sequence group is a second sequence group in the at least two sequence groups, and the second sequence group is different from the first sequence group;

when the second bit information in the 2-bit information is 0, the target frequency domain resource is a first PSFCH frequency domain resource in the multiple PSFCH frequency domain resources, and when the second bit information is 1, the target frequency domain resource is a second PSFCH frequency domain resource in the multiple PSFCH frequency domain resources, and the second PSFCH frequency domain resource is different from the first PSFCH frequency domain resource.

In the scheme, the target sequence group and the target frequency domain resource represent 2-bit information in the first information to indicate the number of PSSCHs carrying data received by the first terminal device, so that the indication mode of the number of PSSCHs is simpler.

In a possible implementation manner, the target frequency domain resource is a resource with the largest identification information among multiple PSFCH frequency domain resources corresponding to the n PSSCHs or a resource with the smallest identification information among multiple PSFCH frequency domain resources corresponding to the n PSSCHs.

The frequency domain resource with the largest identification information is the resource with the highest frequency domain position in the plurality of PSFCH frequency domain resources, or the frequency domain resource with the smallest identification information is the resource with the highest frequency domain position in the plurality of PSFCH frequency domain resources.

In this scheme, 2-bit information in the first information is represented by a target sequence group and a target frequency domain resource, where the target frequency domain resource may be a resource with the largest identification information among multiple PSFCH frequency domain resources corresponding to n PSSCHs or a resource with the smallest identification information among multiple PSFCH frequency domain resources corresponding to n PSSCHs, so as to indicate the number of PSSCHs carrying data received by the first terminal device, and make an indication manner of the number of PSSCHs more flexible.

In a possible implementation manner, the first information indicates that the number of PSSCHs carrying data received by the first terminal device is 2, and a combination of the target sequence group and the target frequency domain resource is a first combination in a combination set; alternatively, the first and second electrodes may be,

the first information indicates that the number of PSSCH carrying data received by the first terminal equipment is 3, and the combination of the target sequence group and the target frequency domain resource is a second combination except the first combination in the combination set; alternatively, the first and second electrodes may be,

the first information indicates that the number of PSSCH carrying data received by the first terminal equipment is 4, and the combination of the target sequence group and the target frequency domain resource is a third combination except the first combination and the second combination in the combination set;

the combination of the target sequence group and the target frequency domain resource included in the combined set includes: the target sequence group is a first sequence group in at least two sequence groups, and the target frequency domain resource is a resource with minimum identification information in the PSFCH frequency domain resources; the target sequence group is a first sequence group in at least two sequence groups, and the target frequency domain resources are resources with the largest identification information in the PSFCH frequency domain resources; the target sequence group is a second sequence group of the at least two sequence groups, and the target frequency domain resource is a resource with minimum identification information in the PSFCH frequency domain resources; the target sequence group is a second sequence group of the at least two sequence groups, and the target frequency domain resource is a resource with the largest identification information in the plurality of PSFCH frequency domain resources.

In the scheme, the number of PSSCH carrying data received by the first terminal equipment is indicated through different sequence groups and frequency domain resources, so that the indication mode of the number of PSSCH is more flexible.

In a possible implementation manner, the first information indicates that the number of PSSCHs carrying data received by the first terminal device is 2, the target sequence group is a first sequence group of at least two sequence groups, and the target frequency domain resource is a resource with minimum identification information among a plurality of PSFCH frequency domain resources; alternatively, the first and second electrodes may be,

the first information indicates that the number of PSSCH carrying data received by the first terminal device is 3, the target sequence group is a second sequence group in at least two sequence groups, and the target frequency domain resource is a resource with minimum identification information in a plurality of PSFCH frequency domain resources; alternatively, the first and second electrodes may be,

the first information indicates that the number of PSSCH carrying data received by the first terminal device is 4, the target sequence group is a first sequence group of at least two sequence groups, and the target frequency domain resource is a resource with the largest identification information in a plurality of PSFCH frequency domain resources.

In this scheme, the first terminal device indicates, through the first sequence group or the second sequence group and the frequency domain resource with the minimum or the maximum identification information among the multiple PSFCH frequency domain resources, that the first terminal device receives data transmitted on 2 PSSCHs, the first terminal device receives data transmitted on 3 PSSCHs, and the first terminal device receives data transmitted on 4 PSSCHs.

In a possible implementation manner, the first information indicates that the number of PSSCHs carrying data received by the first terminal device is 2, and the target frequency domain resource is a first frequency domain resource of the multiple PSFCH frequency domain resources; alternatively, the first and second electrodes may be,

the first information indicates that the number of PSSCH carrying data received by the first terminal equipment is 3, and the target frequency domain resource is a second frequency domain resource except the first frequency domain resource in the PSFCH frequency domain resources; alternatively, the first and second electrodes may be,

the first information indicates that the number of PSSCHs carrying data received by the first terminal device is 4, and the target frequency domain resource is a third frequency domain resource except the first frequency domain resource and the second frequency domain resource in the plurality of PSFCH frequency domain resources.

In the scheme, the first terminal device sends the first information on the first frequency domain resource, the second frequency domain resource or the third frequency domain resource, so that the second terminal device can determine the number of PSSCH (pseudo-random access channels) bearing data received by the first terminal device according to different frequency domain resources receiving the first information, and can avoid the phenomenon of demodulation error caused by that the first terminal device does not identify certain data or data transmitted on certain PSSCH(s), thereby improving the accuracy of data transmission.

In a possible implementation manner, the first information indicates that the number of PSSCHs carrying data received by the first terminal device is 2, and the target frequency domain resource is a resource with the minimum identification information among the multiple PSFCH frequency domain resources; alternatively, the first and second electrodes may be,

the first information indicates that the number of PSSCH carrying data received by the first terminal equipment is 3, and the target frequency domain resource is the resource with the largest identification information in the PSFCH frequency domain resources; alternatively, the first and second electrodes may be,

the first information indicates that the number of PSSCHs carrying data received by the first terminal device is 4, and the target frequency domain resource is a resource with identification information being smaller or larger than the second in the multiple PSFCH frequency domain resources.

In the scheme, the first terminal device sends the first information on the frequency domain resource with the minimum identification information, the resource frequency domain with the maximum identification information, or the frequency domain resource with the second minimum identification information or the second maximum identification information, so that the second terminal device can determine the number of PSSCH bearing the data received by the first terminal device according to the different frequency domain resources receiving the first information, and the phenomenon of demodulation error caused by the fact that the first terminal device does not recognize the data transmitted on a certain PSSCH or certain PSSCH can be avoided, thereby improving the accuracy of data transmission.

In a possible implementation manner, the first information indicates that the number of PSSCHs carrying data received by the first terminal device is 2, and the target frequency domain resource is a resource arranged first in the multiple PSFCH frequency domain resources from small to large according to the order of the identification information; alternatively, the first and second electrodes may be,

the first information indicates that the number of PSSCH carrying data received by the first terminal equipment is 3, and the target frequency domain resource is a resource arranged in the second PSFCH frequency domain resources from small to large according to the identification information; alternatively, the first and second electrodes may be,

the first information indicates that the number of PSSCHs carrying data received by the first terminal equipment is 4, and the target frequency domain resource is the third PSFCH frequency domain resource in the multiple PSFCH frequency domain resources according to the sequence from small to large of the identification information.

In the scheme, the first terminal equipment selects the first three data respectively representing that the first terminal equipment receives data transmitted on 2 PSSCHs, the first terminal equipment receives data transmitted on 3 PSSCHs and the first terminal equipment receives data transmitted on 4 PSSCHs according to the sequence from small to large of the identification information in the plurality of PSFCH frequency domain resources, so that the second terminal equipment can determine the number of the PSSCHs carrying the data received by the first terminal equipment according to different frequency domain resources receiving the first information, the phenomenon of demodulation errors caused by the fact that the first terminal equipment does not recognize the data transmitted on a certain PSSCH or certain PSSCH can be avoided, and the accuracy of data transmission can be improved.

In a possible implementation manner, the first information indicates that the number of PSSCHs carrying data received by the first terminal device is 2, and the target frequency domain resource is a resource arranged in the first of the multiple PSFCH frequency domain resources from large to small according to the identification information; alternatively, the first and second electrodes may be,

the first information indicates that the number of PSSCH carrying data received by the first terminal equipment is 3, and the target frequency domain resource is a resource arranged in the second PSFCH frequency domain resources according to the descending order of the identification information; alternatively, the first and second electrodes may be,

the first information indicates that the number of PSSCHs carrying data received by the first terminal device is 4, and the target frequency domain resource is a third PSFCH frequency domain resource in the multiple PSFCH frequency domain resources according to the descending order of the identification information.

In the scheme, the first terminal equipment selects the first three data respectively representing that the first terminal equipment receives data transmitted on 2 PSSCHs, the first terminal equipment receives data transmitted on 3 PSSCHs and the first terminal equipment receives data transmitted on 4 PSSCHs according to the sequence from large to small of the identification information in the plurality of PSFCH frequency domain resources, so that the second terminal equipment can determine the number of the PSSCHs carrying the data received by the first terminal equipment according to different frequency domain resources receiving the first information, the phenomenon of demodulation errors caused by the fact that the first terminal equipment does not recognize the data transmitted on a certain PSSCH or certain PSSCH can be avoided, and the accuracy of data transmission can be improved.

In one possible implementation, the sequence group includes a sequence group including a sequence with cyclic shift number 1, a sequence with cyclic shift number 4, a sequence with cyclic shift number 7, a sequence with cyclic shift number 10, and a sequence group including a sequence with cyclic shift number 2, a sequence with cyclic shift number 5, a sequence with cyclic shift number 8, and a sequence with cyclic shift number 11.

In a second aspect, an embodiment of the present application provides a communication method, which is applied to a second terminal device, and the method includes:

respectively sending data to first terminal equipment through n physical direct link shared channels PSSCH, wherein n is 2,3 or 4;

on a target frequency domain resource, first information sent by a first terminal device is received through a PSFCH (physical direct link feedback channel), the target frequency domain resource is determined by the first terminal device from a plurality of PSFCH frequency domain resources corresponding to n PSSCHs according to received data, and the first information is used for indicating the number of PSSCHs carrying the data received by the first terminal device.

In a possible implementation manner, receiving, on a target frequency domain resource, first information sent by a first terminal device through a physical direct link feedback channel PSFCH includes:

and on the target frequency domain resource, receiving first information sent by the first terminal equipment through the PSFCH by using a target sequence group, wherein the target sequence group is determined by the first terminal equipment from at least two sequence groups according to the received data.

In a third aspect, an embodiment of the present application provides a communication method, including:

if the PSSCHs are transmitted in the same sub-channel, the first terminal equipment uses a preset sequence group and sends first information to the second terminal equipment on a preset target frequency domain resource, wherein the first information is used for indicating the number of the PSSCHs carrying data received by the communication device.

The preset sequence group includes a sequence with a cyclic shift index of 1, a sequence with a cyclic shift index of 4, a sequence with a cyclic shift index of 7, a sequence group with a cyclic shift index of 10, and a sequence group including a sequence with a cyclic shift index of 2, a sequence with a cyclic shift index of 5, a sequence with a cyclic shift index of 8, and a sequence with a cyclic shift index of 11.

The preset target frequency domain resource is PRB 1.

In a fourth aspect, an embodiment of the present application provides a communication method, including:

the first terminal equipment determines a target frequency domain resource from a plurality of PSFCH frequency domain resources corresponding to the n PSSCHs, and sends first information to the second terminal equipment through the target frequency domain resource by using a preset sequence group, wherein the first information is used for indicating the number of the PSSCHs carrying data received by the communication device.

The preset sequence group includes a sequence group including a sequence with a cyclic shift index of 0, a sequence with a cyclic shift index of 3, a sequence with a cyclic shift index of 6, and a sequence with a cyclic shift index of 9.

The target frequency domain resource is a resource with the largest identification information in a plurality of PSFCH frequency domain resources corresponding to the n PSSCHs.

The frequency domain resource with the largest identification information is the resource with the highest frequency domain position in the plurality of PSFCH frequency domain resources.

In a fifth aspect, an embodiment of the present application provides a communication apparatus, including:

a receiving unit, configured to receive data sent by a second terminal device through n physical direct link shared channels PSSCH, where n is 2,3, or 4;

the processing unit is used for determining target frequency domain resources for feeding back the first information from a plurality of physical direct connection link feedback channel PSFCH frequency domain resources corresponding to the n PSSCHs according to the received data;

a sending unit, configured to send, on the target frequency domain resource, first information to the second terminal device through the PSFCH, where the first information is used to indicate the number of PSSCHs carrying data received by the communication apparatus.

In a possible implementation manner, the sending unit is specifically configured to:

In a sixth aspect, an embodiment of the present application provides a communication apparatus, including:

a sending unit, configured to send data to a first terminal device through n physical direct link shared channels PSSCH, where n is 2,3, or 4;

a receiving unit, configured to receive, on a target frequency domain resource, first information sent by a first terminal device through a PSFCH, where the target frequency domain resource is determined by the first terminal device according to received data from multiple PSFCH frequency domain resources corresponding to n PSSCHs, and the first information is used to indicate the number of PSSCHs carrying data received by the first terminal device.

In a possible implementation manner, the receiving unit is specifically configured to:

The apparatus provided in the fifth aspect to the sixth aspect of the present application may be a terminal device, or may be a chip in the terminal device, where the terminal device or the chip has a function of implementing the communication method in the above aspects or any possible design thereof. The functions may be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more units corresponding to the above functions.

The terminal device includes: the terminal device comprises a processing unit and a transceiver unit, wherein the processing unit can be a processor, the transceiver unit can be a transceiver, the transceiver comprises a radio frequency circuit, and optionally, the terminal device further comprises a storage unit, and the storage unit can be a memory. When the terminal device includes a storage unit for storing computer-executable instructions, the processing unit is connected to the storage unit, and the processing unit executes the computer-executable instructions stored by the storage unit, so that the terminal device performs the communication method in the above aspects or any possible design thereof.

The chip includes: the processing unit may be a processor, and the transceiving unit may be an input/output interface, a pin, a circuit, or the like on a chip. The processing unit may execute computer-executable instructions stored by the memory unit to cause the chip to perform the communication methods in the aspects described above or any possible design thereof. Alternatively, the storage unit may be a storage unit (e.g., a register, a cache, etc.) inside the chip, and the storage unit may also be a storage unit (e.g., a read-only memory (ROM)) located outside the chip inside the terminal device, or other types of static storage devices (e.g., a Random Access Memory (RAM)) that can store static information and instructions, and the like.

The aforementioned processor may be a Central Processing Unit (CPU), a microprocessor or an Application Specific Integrated Circuit (ASIC), or may be one or more integrated circuits for controlling the execution of programs for the communication method according to the above aspects or any possible design thereof.

A seventh aspect of the embodiments of the present application provides a computer-readable storage medium for storing computer instructions, which, when executed on a computer, cause the computer to perform the communication method provided in any one of the first aspect to the second aspect of the embodiments of the present application.

An eighth aspect of embodiments of the present application provides a computer program product containing instructions, which when run on a computer, causes the computer to perform the communication method provided in any one of the first to second aspects of embodiments of the present application.

A ninth aspect of an embodiment of the present application provides a communication apparatus, including: a memory, a processor, and a computer program; wherein a computer program is stored in the memory and configured to be executed by the processor, the computer program comprising instructions for performing the method of any of the first to second aspects.

According to the communication method, the communication device and the communication system provided by the embodiment of the application, a first terminal device respectively receives data sent by a second terminal device through n PSSCH, wherein n is 2,3 or 4, then the first terminal device determines a target frequency domain resource for feeding back first information from a plurality of PSFCH frequency domain resources corresponding to the n PSSCH according to the received data, and sends the first information to the second terminal device through the PSFCH on the target frequency domain resource, wherein the first information is used for indicating the number of PSSCH carrying the data received by the first terminal device. After receiving the data sent by the second terminal device, the first terminal device can feed back the number of PSSCH carrying the data received by the first terminal device to the second terminal device through the target frequency domain resource, so that the phenomenon of demodulation error caused by that the first terminal device does not identify the data transmitted on a certain PSSCH or certain PSSCH can be avoided, and the accuracy of data transmission can be improved.

Drawings

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

fig. 2 is a first scenario of V2X communication;

fig. 3 is a diagram illustrating scenario two of V2X communication;

fig. 4 is a diagram of a scenario three of V2X communication;

fig. 5 is a signaling interaction diagram of the communication method of the present application;

fig. 6a is a schematic diagram of the target frequency domain resource when the number of the pschs is 2;

FIG. 6b is a diagram of the target frequency domain resource when the number of PSSCH is 3;

FIG. 6c is a diagram of the target frequency domain resource when the number of PSSCHs is 4;

FIG. 6d is another diagram of the target frequency domain resource when the number of PSSCHs is 4;

FIG. 7a is another diagram of the target frequency domain resource when the number of PSSCHs is 2;

FIG. 7b is another diagram of the target frequency domain resource when the number of PSSCHs is 3;

FIG. 7c is another diagram of the target frequency domain resource when the number of PSSCHs is 4;

FIG. 8a is another diagram of the target frequency domain resource when the number of PSSCHs is 2;

FIG. 8b is another diagram of the target frequency domain resource when the number of PSSCHs is 3;

FIG. 8c is a further diagram of the target frequency domain resource when the number of PSSCHs is 4;

FIG. 9a is a diagram of a target frequency domain resource;

FIG. 9b is another diagram of a target frequency domain resource;

fig. 10a is another diagram of the target frequency domain resource when the number of pschs is 2;

FIG. 10b is another diagram of the target frequency domain resource when the number of PSSCHs is 3;

FIG. 10c is another diagram of the target frequency domain resource when the number of PSSCHs is 4;

FIG. 11a is a schematic diagram of a target frequency domain resource;

FIG. 11b is a further diagram of a target frequency domain resource;

fig. 12 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 13 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 14 is a schematic structural diagram of a terminal device according to an embodiment of the present application.

Detailed Description

Hereinafter, some terms in the present application are explained to facilitate understanding by those skilled in the art.

1) Units in this application refer to functional units or logical units. It may be in the form of software whose function is carried out by a processor executing program code; but may also be in hardware.

2) "plurality" means two or more, and other terms are analogous. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. The ranges described as "above" or "below" and the like include boundary points.

In this application, the first terminal device may be a device having a receiving capability, and the second terminal device may be a device having a transmitting capability.

For clarity and conciseness of the following descriptions of the various embodiments, a brief introduction to the related art is first given:

the communication method provided by the following embodiments of the present application is applicable to a communication system. Fig. 1 is a schematic structural diagram of a communication system according to an embodiment of the present application. As shown in fig. 1, the communication system may include at least one network device 10 and at least one terminal device located within the coverage area of the network device 10. The terminal equipment may be fixed or mobile. Fig. 1 is a schematic diagram, and the communication system may further include other devices, such as a core network device (not shown in fig. 1), and the network device is connected to the core network device in a wireless or wired manner. The core network device and the network device may be separate physical devices, or the function of the core network device and the logic function of the network device may be integrated on the same physical device, or a physical device may be integrated with a part of the function of the core network device and a part of the function of the network device. In addition, other network devices, such as a wireless relay device and a wireless backhaul device, may also be included in the communication system, which are not shown in fig. 1. The embodiments of the present application do not limit the number of core network devices, and terminal devices included in the communication system.

The network device is an entity, such as a new generation base station (gbnodeb), in the network side for transmitting or receiving signals. The network device may be a device for communicating with the mobile device. The network device may be an AP in a Wireless Local Area Network (WLAN), a Base Transceiver Station (BTS) in a global system for mobile communications (GSM) or Code Division Multiple Access (CDMA), a base station (NodeB, NB) in a Wideband Code Division Multiple Access (WCDMA), an evolved Node B (eNB, or eNodeB) in a Long Term Evolution (Long Term Evolution, LTE), or a relay station or an Access point, or a vehicle-mounted device, a wearable device, and a network device in a future 5G network or a network device in a future evolved Public Land Mobile Network (PLMN), or a network device in an NR system. In addition, in this embodiment of the present application, a network device provides a service for a cell, and a terminal device communicates with the network device through a transmission resource (for example, a frequency domain resource or a spectrum resource) used by the cell, where the cell may be a cell corresponding to the network device (for example, a base station), and the cell may belong to a macro base station or a base station corresponding to a small cell (small cell), and the small cell may include: urban cell (metro cell), micro cell (microcell), pico cell (pico cell), femto cell (femto cell), etc., and these small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-rate data transmission service. Furthermore, the network device may be other means for providing wireless communication functionality for the terminal device, where possible. The embodiments of the present application do not limit the specific technologies and the specific device forms used by the network devices. For convenience of description, in the embodiments of the present application, an apparatus for providing a wireless communication function for a terminal device is referred to as a network device.

The terminal device may be a terminal device located on the vehicle in V2X (for example, a vehicle-mounted terminal device, a terminal device carried by a user riding in the vehicle), may be a terminal device located on X (X may be a vehicle, infrastructure, network, pedestrian, etc.), or may be a vehicle terminal itself or X itself. As used herein, a terminal device may be a wireless terminal device capable of receiving network device scheduling and indication information, and a wireless terminal device may be a device providing voice and/or data connectivity to a user, or a handheld device having wireless connection capability, or other processing device connected to a wireless modem. Wireless terminal devices, which may be mobile terminal devices such as mobile telephones (or "cellular" telephones), computers, and data cards, such as portable, pocket, hand-held, computer-included, or vehicle-mounted mobile devices, may communicate with one or more core networks or the internet via a radio access network (e.g., a RAN). For example, devices such as Personal Communication Services (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), tablet computers (pads), and computers with wireless transceiving functions. A wireless terminal device may also be referred to as a system, a subscriber unit (subscriber unit), a subscriber station (subscriber station), a mobile station (mobile station), a Mobile Station (MS), a remote station (remote station), an Access Point (AP), a remote terminal device (remote terminal), an access terminal device (access terminal), a user terminal device (user terminal), a user agent (user agent), a Subscriber Station (SS), a user terminal device (CPE), a terminal (terminal), a User Equipment (UE), a Mobile Terminal (MT), etc. The wireless terminal device may also be a wearable device as well as a next generation communication system, e.g. a terminal device in a 5G network or a terminal device in a future evolved PLMN network, a terminal device in a New Radio (NR) communication system, etc.

Further, as shown in fig. 1, the communication between the network device 10 and the terminal device will be described. Specifically, the network device 10 may be a sender, and may send downlink information to one or some terminal devices from the terminal devices 11 to 16. Accordingly, the terminal devices 11 to 15 capable of directly communicating with the network device 10 may also transmit the uplink information to the network device 10 separately or simultaneously.

The network equipment and the terminal equipment can be deployed on land, including indoors or outdoors, and are handheld or vehicle-mounted; can also be deployed on the water surface; it may also be deployed on airborne airplanes, balloons, and satellites. The embodiment of the application does not limit the application scenarios of the network device and the terminal device.

In the communication system of the embodiment shown in fig. 1, the terminal devices 14 to 16 may constitute a device-to-device communication system, in which the terminal device 15 as a sender may send information to one or more of the

terminal devices

14 and 16, and accordingly, the

terminal devices

14 and 16 may send data to the terminal device 15 separately or simultaneously.

The communication system may be an LTE system, an LTE Advanced (LTE-a) system, or a 5G NR system. The embodiments of the present application may also be applied to other communication systems, as long as a presentity in the communication system can receive data sent by another entity through n pschs, and can determine, according to the received data, a target frequency domain resource for feeding back first information from multiple PSFCH frequency domain resources corresponding to the n pschs, and send the first information to another entity through the PSFCH on the target frequency domain resource, where the first information is used to indicate the number of PSSCHs carrying the data received by the entity. Another entity can send data to the entity through n PSSCHs, and receives the first information sent by the entity through a PSFCH on a target frequency domain resource to acquire the number of PSSCHs carrying the data received by the entity.

Further, the scheme of the embodiment of the present application is applied to the V2X communication process, and is particularly applied to a scenario in which the number of PSSCHs carrying data received by a terminal at a receiving end needs to be known.

Fig. 2 is a first scenario of V2X communication. As shown in fig. 2, currently, V2X may communicate with each other by using a direct link (Sidelink). Namely, the vehicle (i.e. the terminal device located on the vehicle, referred to as vehicle terminal device for short) and the X (i.e. the terminal device located on the X) can directly perform communication through the direct link by using the resource configured by the network device, such as signaling interaction in safety aspects, such as internet access, call making, notification of location information, and the like, without transferring through the network device. Fig. 2 is a schematic diagram illustrating communication between V2V using a direct link.

When the communication between the V2X is performed by using the direct link, the communication between the V2X can be divided into two modes, one is a network device dynamic scheduling mode, and the other is a terminal autonomous resource selection mode. Fig. 3 is a schematic diagram of a scenario two of V2X communication. Fig. 4 is a schematic view of a scenario three of V2X communication. Taking a vehicle as an example, as shown in fig. 3, when the network device performs communication between V2X in the dynamic scheduling mode of the network device, the network device may dynamically or semi-dynamically schedule resources for the vehicle terminal device based on the request message sent by the vehicle terminal device. In this way, the vehicle terminal device can communicate with the terminal device located on X through the direct link using the resources scheduled by the network device. As shown in fig. 4, when the terminal autonomous Resource selection mode is used for communication between V2X, the network device may configure a Resource pool for the vehicle terminal device through a System Information Block (SIB) message or Radio Resource Control (RRC) signaling, or may pre-configure a Resource pool on the terminal device. In this way, the vehicle terminal device can obtain resources from the resource pool and communicate with the terminal device located on X through the direct link. In specific implementation, the vehicle terminal device may acquire the resource from the resource pool in a random selection manner or an interception reservation mechanism-based manner.

The system architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not form a limitation on the technical solution provided in the embodiment of the present application, and as a person of ordinary skill in the art knows that along with the evolution of the network architecture and the appearance of a new service scenario, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.

First, a brief description is given of an application scenario of the embodiment of the present application.

In the transmission of the direct link (sidelink), the PSFCH feedback resources occur in N slot (slots) periods, where the value of N is currently 1,2, and 4. Thus, for a PSSCH that occurs at slot n, the corresponding PSFCH occurs at slot n + a. Due to the insufficient resources of the PSFCH, there is a case of multiplexing the PSFCH resources, that is, HARQ feedback information of a plurality of PSSCHs is fed back through one PSFCH resource. For example: the terminal a sends data to the terminal B through the PSSCH for multiple times, and if the terminal B does not have enough power to reply HARQ feedback information of multiple PSSCHs at the same time, the terminal B can only reply through one PSFCH, and at this time, the terminal B needs to perform an and operation between data carrying PSSCHs, and transmit the operation result. Such as: the decoding results of terminal B are correct (1) and error (0) for two data blocks carried by the first psch, and the decoding results of terminal B are error (0) and error (0) for two data blocks carried by the second psch, and the bit-wise and result of both is error (0) and error (0), at this time, the two bits carried by the PSFCH are the above-mentioned and result, i.e., {0,0 }. However, the terminal device at the receiving end may not recognize the data block carried on the PSSCH, and when the terminal device at the receiving end does not recognize the data block carried on a certain PSSCH, the terminal device at the receiving end may perform feedback according to the decoding results of the data blocks received on the remaining PSSCHs. For example, terminal a transmits a data block to terminal B through PSSCH1, PSSCH2 and PSSCH3, terminal B only recognizes the transmission of PSSCH2 and PSSCH3 and demodulates correctly, at this time, terminal B feeds back {1,1} to terminal a, at this time, terminal a considers that terminal B demodulates all data transmitted on PSSCH1, PSSCH2 and PSSCH3 correctly, so that the information fed back to terminal a by terminal B is inaccurate, and data transmission is wrong.

In view of the above problem, in the embodiment of the present application, a communication method is provided, where a first terminal device receives data sent by a second terminal device through n pschs, respectively, where n is 2,3, or 4, and then the first terminal device determines, according to the received data, a target frequency domain resource for feeding back first information from multiple PSFCH frequency domain resources corresponding to the n pschs, and sends the first information to the second terminal device through the PSFCH on the target frequency domain resource, where the first information is used to indicate the number of PSSCHs carrying the data received by the first terminal device. After receiving the data sent by the second terminal device, the first terminal device can feed back the number of PSSCH carrying the data received by the first terminal device to the second terminal device through the target frequency domain resource, so that the phenomenon of demodulation error caused by that the first terminal device does not identify the data transmitted on a certain PSSCH or certain PSSCH can be avoided, and the accuracy of data transmission can be improved.

The technical solution of the present application will be described in detail below with reference to specific examples. It should be noted that the following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

Fig. 5 is a signaling interaction diagram of the communication method of the present application. In this embodiment, a first terminal device is taken as a terminal device of a receiving end, a second terminal device is taken as a terminal device of a sending end, and information exchange between the first terminal device and the second terminal device is performed by taking an example. On the basis of the application scenarios shown in fig. 1 to fig. 4, as shown in fig. 5, in this embodiment, the communication method may include the following steps:

step 501: the second terminal device transmits data to the first terminal device through the n PSSCHs, respectively.

Wherein n is 2,3 or 4.

In this step, in a direct link (sidelink) transmission, the second terminal device may send data to the first terminal device through 1 psch, may send data to the first terminal device through 2 pschs, may send data to the first terminal device through 3 pschs, or may send data to the first terminal device through 4 pschs. In this embodiment, the case that the first terminal device receives data sent by the second terminal device through 2,3, or 4 PSSCHs is mainly involved.

Step 502: and the first terminal equipment determines a target frequency domain resource for feeding back the first information from a plurality of PSFCH frequency domain resources corresponding to the n PSSCHs according to the received data.

In this step, the data received by the first terminal device may be understood as data successfully recognized by the first terminal device, and may be data transmitted on n pschs, or data transmitted on less than n pschs. For example: the second terminal device sends data to the first terminal device through the 4 pschs, and the first terminal device successfully recognizes the data on the 4 pschs, that is, the data received by the first terminal device includes the data on the 4 pschs. For another example: the second terminal equipment sends data to the first terminal equipment through 4 PSSCHs, and the first terminal equipment successfully identifies the data on 3 PSSCHs, namely the data received by the first terminal equipment comprises the data on 3 PSSCHs, at this time, the data transmitted on one PSCCH is not successfully identified.

The first terminal equipment determines a target frequency domain resource from a plurality of PSFCH frequency domain resources corresponding to the n PSSCHs according to the received data, and accordingly returns first information to the second terminal equipment on the target frequency domain resource. The determined target frequency domain resources are different, that is, the number of the PSSCH carrying the received data can be indicated by the different target frequency domain resources.

For example, the PSFCH frequency domain resource corresponding to the PSSCH may be a Physical Resource Block (PRB), for example.

Step 503: the first terminal equipment sends first information to the second terminal equipment through the PSFCH on the target frequency domain resource, wherein the first information is used for indicating the number of PSSCH carrying data received by the first terminal equipment.

In this step, after determining the target frequency domain resource, the first terminal device sends the first information to the second terminal device through the PSFCH on the target frequency domain resource. After receiving the first information, the second terminal device can know that the first terminal device receives data transmitted on several PSSCHs according to the target frequency domain resource for sending the first information.

It will be appreciated by those skilled in the art that in practical applications, the first information needs to be transmitted through the sequence group in addition to the target frequency domain resource. It should be noted that, in the existing standard, a PSFCH resource uses sequences on 1 PRB to represent ACK or NACK, and there are 12 subcarriers in total on one PRB, so that maximum 12 mutually orthogonal sequences can be supported, where these sequences are obtained by performing cyclic shift on one base sequence, for example, (1,2,3,4) is one sequence, and then (2,3,4,1) is obtained by performing cyclic shift on 1 bit, the interval between these two sequences is 1, that is, the number of bits of cyclic shift, the base sequence may be referred to as a sequence with cyclic shift index 0, and the sequence obtained by shifting x is referred to as a sequence with cyclic shift index x. When different ACK/NACK information is identified by different sequences, the error rate between different ACK/NACK information is related to the above-mentioned sequence interval, and the larger the sequence interval, the lower the error rate. Wherein the smallest sequence spacing between all used sequences is most correlated with the bit error rate.

Therefore, in order to reduce the error rate, the first information is generally transmitted using a sequence group including a cyclic shift sequence No. 0, a cyclic shift sequence No. 3, a cyclic shift sequence No. 6, and a cyclic shift sequence No. 9, so as to indicate that the first terminal device has received data transmitted on one pscch.

To distinguish from the feedback channel of one psch, the first information may be transmitted using a sequence group including a cyclic shift reference number 1 sequence, a cyclic shift reference number 4 sequence, a cyclic shift reference number 7 sequence, and a cyclic shift reference number 10 sequence, or using a sequence group including a cyclic shift reference number 2 sequence, a cyclic shift reference number 5 sequence, a cyclic shift reference number 8 sequence, and a cyclic shift reference number 11 sequence.

Of course, the first information may be transmitted using a sequence group including another sequence, for example, a sequence group including a cyclic shift index 1 sequence, a cyclic shift index 2 sequence, a cyclic shift index 3 sequence, a cyclic shift index 4 sequence, or the like, as long as the first information can be successfully transmitted to the second terminal device and distinguished from the feedback channel of one psch, and the sequence group transmitting the first information is not particularly limited in the embodiment of the present application. In the embodiments of the present application, the first information is transmitted by taking, as an example, a sequence group including a sequence with cyclic shift reference numeral 1, a sequence with cyclic shift reference numeral 4, a sequence with cyclic shift reference numeral 7, and a sequence group with cyclic shift reference numeral 10, or a sequence group including a sequence with cyclic shift reference numeral 2, a sequence with cyclic shift reference numeral 5, a sequence with cyclic shift reference numeral 8, and a sequence with cyclic shift reference numeral 11.

It should be noted that, for convenience of description, in the embodiment of the present application, a sequence group including a sequence denoted by cyclic shift number 1, a sequence denoted by cyclic shift number 4, a sequence denoted by cyclic shift number 7, and a sequence denoted by cyclic shift number 10 is referred to as sequence group 1, and a sequence group including a sequence denoted by cyclic shift number 2, a sequence denoted by cyclic shift number 5, a sequence denoted by cyclic shift number 8, and a sequence denoted by cyclic shift number 11 is referred to as sequence group 2.

Specifically, for example, the first information may be transmitted by using a preset sequence group, where the preset sequence group may be sequence group 1, or may also be sequence group 2. When the second terminal equipment uses any one sequence group in the two received sequence groups to send the first information, the fact that the first terminal equipment receives the data transmitted on the at least two PSSCHs can be determined.

Further, the second terminal device needs to determine the number of pschs carrying data received by the first terminal device according to the target frequency domain resource. In a possible implementation manner, the first information indicates that the number of PSSCHs carrying data received by the first terminal device is 2, and the target frequency domain resource is a first frequency domain resource of the multiple PSFCH frequency domain resources; or the first information indicates that the number of PSSCH carrying data received by the first terminal device is 3, and the target frequency domain resource is a second frequency domain resource except the first frequency domain resource in the plurality of PSFCH frequency domain resources; or the first information indicates that the number of the pschs carrying the data received by the first terminal device is 4, and the target frequency domain resource is a third frequency domain resource except the first frequency domain resource and the second frequency domain resource in the multiple PSFCH frequency domain resources.

Specifically, if the first terminal device receives data transmitted on 2 pschs, it may be determined that the target frequency domain resource to which the first information is transmitted is a first frequency domain resource of the multiple PSFCH frequency domain resources, if the first terminal device receives data transmitted on 3 pschs, it may be determined that the target frequency domain resource to which the first information is transmitted is a second frequency domain resource of the multiple PSFCH frequency domain resources, and if the first terminal device receives data transmitted on 4 pschs, it may be determined that the target frequency domain resource to which the first information is transmitted is a third frequency domain resource of the multiple PSFCH frequency domain resources. The first frequency domain resource, the second frequency domain resource and the third frequency domain resource are different.

For example: it is assumed that the preset sequence group is sequence group 1, that is, the first terminal device sends the first information to the second terminal device using sequence group 1, so as to feed back the data that the second terminal device receives the data transmitted on at least two pschs to the second terminal device. If the first terminal device receives data transmitted on 2 PSSCHs, the first terminal device may use the above sequence set 1 and transmit the first information to the second terminal device through the PSFCH through the first frequency-domain resource (e.g., PRB 1); if the first terminal device receives data transmitted on 3 PSSCHs, the first terminal device may use the above sequence set 1 and transmit the first information to the second terminal device through the PSFCH through the second frequency-domain resource (e.g., PRB 2); if the first terminal device receives data transmitted on 4 pschs, the first terminal device may transmit the first information to the second terminal device through the PSFCH using sequence set 1 as described above and through the first frequency-domain resource (e.g., PRB 3). Therefore, the second terminal equipment can determine the number of PSSCH bearing the data received by the first terminal equipment according to the target frequency domain resource receiving the first information.

Of course, the preset sequence group may also be sequence group 2, and when the preset sequence group is sequence group 2, the first information may be transmitted in a similar manner to that when the preset sequence group is sequence group 1, for example, when the first terminal device receives data transmitted on 2 PSSCHs, the first terminal device may transmit the first information to the second terminal device through the PSFCH using sequence group 2 and a first frequency resource (e.g., PRB1) among the multiple PSFCH frequency resources. Reference may be made to the above description for details, which are not repeated herein.

In this embodiment, the first terminal device sends the first information on the first frequency domain resource, the second frequency domain resource, or the third frequency domain resource, so that the second terminal device can determine the number of PSSCHs carrying data received by the first terminal device according to different frequency domain resources receiving the first information, and can avoid a phenomenon of demodulation error caused by the fact that the first terminal device does not recognize data transmitted on a certain PSSCH or certain PSSCHs, thereby improving accuracy of data transmission.

In a possible implementation manner, the first information indicates that the number of PSSCHs carrying data received by the first terminal device is 2, and the target frequency domain resource is a resource with the minimum identification information among the multiple PSFCH frequency domain resources; or the first information indicates that the number of PSSCH carrying data received by the first terminal device is 3, and the target frequency domain resource is the resource with the largest identification information in the PSFCH frequency domain resources; or, the first information indicates that the number of pschs carrying data received by the first terminal device is 4, and the target frequency domain resource is a resource whose identification information is smaller or larger than the second in the multiple PSFCH frequency domain resources.

Specifically, if the first terminal device receives data transmitted on 2 PSSCHs, it may be determined that the target frequency domain resource for sending the first information is a resource with the minimum identification information in the multiple PSFCH frequency domain resources, that is, the first frequency domain resource in the above embodiment may be the frequency domain resource with the minimum identification information; if the first terminal device receives data transmitted on 3 PSSCHs, it may be determined that the target frequency domain resource for sending the first information is a resource with the largest identification information among the multiple PSFCH frequency domain resources, that is, the second frequency domain resource in the above embodiment may be a frequency domain resource with the largest identification information; if the first terminal device receives data transmitted on 4 PSSCHs, it may be determined that the target frequency domain resource for sending the first information is a resource whose identification information is smaller or larger than the second among the multiple PSFCH frequency domain resources, that is, the third frequency domain resource in the foregoing embodiment may be a frequency domain resource whose identification information is smaller or larger than the second.

The identification information of the frequency domain resources may be understood as a reference number or index number of the frequency domain resources, and the frequency domain resource with the largest identification information is the resource with the highest frequency domain position in the plurality of PSFCH frequency domain resources, or the frequency domain resource with the smallest identification information is the resource with the highest frequency domain position in the plurality of PSFCH frequency domain resources.

For example, fig. 6a is a schematic diagram of the target frequency domain resource when the number of pschs is 2, fig. 6b is a schematic diagram of the target frequency domain resource when the number of pschs is 3, fig. 6c is a schematic diagram of the target frequency domain resource when the number of pschs is 4, and fig. 6d is another schematic diagram of the target frequency domain resource when the number of pschs is 4. As shown in fig. 6a, it is assumed that the preset sequence group is sequence group 1, that is, the first terminal device sends the first information to the second terminal device through sequence group 1, so as to feed back the data that it has received the transmissions on the at least two pschs to the second terminal device. If the first terminal device receives data transmitted on 2 pschs, the first terminal device may transmit the first information to the second terminal device through the PSFCH using sequence set 1 and a resource (e.g., PRB1) with the smallest identification information among the multiple PSFCH frequency-domain resources. As shown in fig. 6b, if the first terminal device receives data transmitted on 3 PSSCHs, the first terminal device may transmit the first information to the second terminal device through the PSFCH by using the above sequence set 1 and the resource (e.g., PRB3) with the largest identification information among the multiple PSFCH frequency-domain resources. As shown in fig. 6c or fig. 6d, if the first terminal device receives data transmitted on 4 pschs, the first terminal device may transmit the first information to the second terminal device through the PSFCH using the above sequence set 1 and a resource (e.g., PRB2 or PRB3) with the second smallest or largest identification information in the multiple PSFCH frequency-domain resources. Therefore, the second terminal equipment can determine the number of PSSCH bearing the data received by the first terminal equipment according to the target frequency domain resource receiving the first information.

Of course, the preset sequence group may be sequence group 2, and when the preset sequence group is sequence group 2, the first information may be transmitted in a similar manner to that when the preset sequence group is sequence group 1, for example, when the first terminal device receives data transmitted on 2 PSSCHs, the first terminal device may transmit the first information to the second terminal device through the PSFCH using sequence group 2 and a resource (e.g., PRB1) with the smallest identification information among the multiple PSFCH frequency domain resources. Reference may be made to the above description for details, which are not repeated herein.

In this embodiment, the first terminal device sends the first information on the frequency domain resource with the minimum identification information, the resource frequency domain with the maximum identification information, or the frequency domain resource with the second minimum or second maximum identification information, so that the second terminal device can determine the number of PSSCHs carrying data received by the first terminal device according to different frequency domain resources receiving the first information, and can avoid a phenomenon of demodulation error caused by the fact that the first terminal device does not recognize data transmitted on a certain or some PSSCHs, thereby improving the accuracy of data transmission.

In another possible implementation manner, the first information indicates that the number of PSSCHs carrying data received by the first terminal device is 2, and the target frequency domain resource is a resource arranged first in the multiple PSFCH frequency domain resources according to the sequence from small to large of the identification information; or the first information indicates that the number of PSSCH carrying data received by the first terminal device is 3, and the target frequency domain resource is a resource arranged in the second PSFCH frequency domain resources according to the sequence from small to large of the identification information; or, the first information indicates that the number of PSSCHs carrying data received by the first terminal device is 4, and the target frequency domain resource is a third resource arranged in the multiple PSFCH frequency domain resources from small to large according to the identification information.

Specifically, the first three signals that the first terminal device receives data transmitted on 2 PSSCHs, the first terminal device receives data transmitted on 3 PSSCHs, and the first terminal device receives data transmitted on 4 PSSCHs may be selected in order of the identification information in the multiple PSFCH frequency domain resources from small to large. For example, if the first terminal device receives data transmitted on 2 PSSCHs, it may be determined that the target frequency domain resource for sending the first information is a resource, in the multiple PSFCH frequency domain resources, that is, a resource with the smallest identification information, in the multiple PSFCH frequency domain resources, and may also be understood as a resource, in the multiple PSFCH frequency domain resources, that is, the first frequency domain resource in the above embodiment may be a resource, in which the identification information is arranged in the first order from the smallest to the largest; if the first terminal device receives data transmitted on 3 PSSCHs, it may be determined that the target frequency domain resource for sending the first information is a resource in which the identification information is arranged in the second from among the multiple PSFCH frequency domain resources in the descending order of the identification information, or may be understood as a resource in which the identification information is arranged in the second from among the multiple PSFCH frequency domain resources, that is, the second frequency domain resource in the foregoing embodiment may be a resource in which the identification information is arranged in the second from the descending order of the identification information; if the first terminal device receives data transmitted on 4 pschs, it may be determined that the target frequency domain resource for sending the first information is a resource in which identification information is arranged in a third order from a small order to a large order among the multiple PSFCH frequency domain resources, or may be understood as a resource in which identification information is arranged in a second order from a small order among the multiple PSFCH frequency domain resources, that is, the second frequency domain resource in the foregoing embodiment may be a resource in which identification information is arranged in a third order from a small order to a large order.

For example, fig. 7a is another diagram of the target frequency domain resource when the number of the pschs is 2, fig. 7b is another diagram of the target frequency domain resource when the number of the pschs is 3, and fig. 7c is another diagram of the target frequency domain resource when the number of the pschs is 4. As shown in fig. 7a, it is assumed that the preset sequence group is sequence group 1, that is, the first terminal device sends the first information to the second terminal device using sequence group 1, so as to feed back the data that it has received the transmissions on the at least two pschs to the second terminal device. If the first terminal device receives data transmitted on 2 pschs, the first terminal device may transmit the first information to the second terminal device through the PSFCH using the above sequence group 1 and a resource (e.g., PRB1) of the multiple PSFCH frequency-domain resources that is ranked first in order from smaller to larger according to the identification information. As shown in fig. 7b, if the first terminal device receives data transmitted on 3 PSSCHs, the first terminal device may transmit the first information to the second terminal device through the PSFCH by using the above sequence group 1 and a resource (e.g., PRB2) in which the identification information is ranked second from small to large in the frequency domain resources of the multiple PSFCH. As shown in fig. 7c, if the first terminal device receives data transmitted on 4 PSSCHs, the first terminal device may transmit the first information to the second terminal device through the PSFCH using the above sequence group 1 and a resource (e.g., PRB3) arranged in the third of the multiple PSFCH frequency-domain resources in the order from small to large according to the identification information. Therefore, the second terminal equipment can determine the number of PSSCH bearing the data received by the first terminal equipment according to the target frequency domain resource receiving the first information.

Of course, the preset sequence group may be sequence group 2, and when the preset sequence group is sequence group 2, the first information may be transmitted in a similar manner to that when the preset sequence group is sequence group 1, for example, when the first terminal device receives data transmitted on 2 PSSCHs, the first terminal device may transmit the first information to the second terminal device through the PSFCH using sequence group 2 and a resource (e.g., PRB1) in which the identification information is ranked first in the order of small to large from among the multiple PSFCH frequency domain resources. Reference may be made to the above description for details, which are not repeated herein.

In this embodiment, the first terminal device selects, according to the order from small to large of the identification information in the multiple PSFCH frequency domain resources, the first three data respectively indicating that the first terminal device receives data transmitted on 2 PSSCHs, the first terminal device receives data transmitted on 3 PSSCHs, and the first terminal device receives data transmitted on 4 PSSCHs, so that the second terminal device can determine the number of PSSCHs carrying the data received by the first terminal device according to the different frequency domain resources receiving the first information, and can avoid a phenomenon of demodulation error caused by the fact that the first terminal device does not recognize data transmitted on a certain PSSCH or some PSSCHs, thereby improving accuracy of data transmission.

In yet another possible implementation manner, the first information indicates that the number of PSSCHs carrying data received by the first terminal device is 2, and the target frequency domain resource is a resource arranged first in the multiple PSFCH frequency domain resources according to the descending order of the identification information; or the first information indicates that the number of PSSCH carrying data received by the first terminal device is 3, and the target frequency domain resource is a resource arranged in the second PSFCH frequency domain resources according to the descending order of the identification information; or, the first information indicates that the number of pschs carrying data received by the first terminal device is 4, and the target frequency domain resource is a third resource arranged in the multiple PSFCH frequency domain resources in descending order of the identification information.

Specifically, the difference between this implementation and the above implementation is that in this implementation, the first three may be selected to respectively indicate that the first terminal device receives data transmitted on 2 PSSCHs, the first terminal device receives data transmitted on 3 PSSCHs, and the first terminal device receives data transmitted on 4 PSSCHs, in order of the identification information in the multiple PSFCH frequency domain resources from large to small. For example, if the first terminal device receives data transmitted on 2 PSSCHs, it may be determined that the target frequency domain resource for sending the first information is a resource, in the multiple PSFCH frequency domain resources, that is, a resource with the largest identification information among the multiple PSFCH frequency domain resources, and may also be understood as a resource, in the multiple PSFCH frequency domain resources, that is, the first frequency domain resource in the above embodiment may be a resource, in the multiple PSFCH frequency domain resources, that is, the first frequency domain resource is arranged in the first frequency domain; if the first terminal device receives data transmitted on 3 PSSCHs, it may be determined that the target frequency domain resource for sending the first information is a resource in which identification information is arranged in a second order from a large order to a small order among the multiple PSFCH frequency domain resources, or may be understood as a resource in which identification information is arranged in a second order from a large order to a small order among the multiple PSFCH frequency domain resources, that is, the second frequency domain resource in the above embodiment may be a resource in which identification information is arranged in a second order from a large order to a small order; if the first terminal device receives data transmitted on 4 pschs, it may be determined that the target frequency domain resource for sending the first information is a resource in which identification information is arranged in a third order from a large order to a small order among the multiple PSFCH frequency domain resources, or may be understood as a resource in which identification information is arranged in a second order from a large order to a small order among the multiple PSFCH frequency domain resources, that is, the second frequency domain resource in the foregoing embodiment may be a resource in which identification information is arranged in a third order from a large order to a small order.

For example, fig. 8a is another schematic diagram of the target frequency domain resource when the number of the pschs is 2, fig. 8b is another schematic diagram of the target frequency domain resource when the number of the pschs is 3, and fig. 8c is another schematic diagram of the target frequency domain resource when the number of the pschs is 4. As shown in fig. 8a, it is assumed that the preset sequence group is sequence group 1, that is, the first terminal device sends the first information to the second terminal device using sequence group 1, so as to feed back the data that it has received the transmissions on at least two pschs to the second terminal device. If the first terminal device receives data transmitted on 2 pschs, the first terminal device may transmit the first information to the second terminal device through the PSFCH using the above sequence group 1 and a resource (e.g., PRB2) of the multiple PSFCH frequency-domain resources that is ranked first in order from the largest identification information to the smallest identification information. As shown in fig. 8b, if the first terminal device receives data transmitted on 3 PSSCHs, the first terminal device may transmit the first information to the second terminal device through the PSFCH by using the above sequence group 1 and a resource (e.g., PRB2) in which the identification information is ranked second in descending order from the beginning among the multiple PSFCH frequency-domain resources. As shown in fig. 8c, if the first terminal device receives data transmitted on 4 PSSCHs, the first terminal device may transmit the first information to the second terminal device through the PSFCH by using the above sequence group 1 and a resource (e.g., PRB2) arranged in the third of the multiple PSFCH frequency-domain resources in the descending order of the identification information. Therefore, the second terminal equipment can determine the number of PSSCH bearing the data received by the first terminal equipment according to the target frequency domain resource receiving the first information.

Of course, the preset sequence group may be sequence group 2, and when the preset sequence group is sequence group 2, the first information may be transmitted in a similar manner to that when the preset sequence group is sequence group 1, for example, when the first terminal device receives data transmitted on 2 PSSCHs, the first terminal device may transmit the first information to the second terminal device through the PSFCH using sequence group 2 and a resource (e.g., PRB2) in which the identification information is ranked first in descending order from the largest to the smallest among the multiple PSFCH frequency domain resources. Reference may be made to the above description for details, which are not repeated herein.

In this embodiment, the first terminal device selects, according to the sequence from large to small of the identification information in the multiple PSFCH frequency domain resources, the first three data respectively indicating that the first terminal device receives data transmitted on 2 PSSCHs, the first terminal device receives data transmitted on 3 PSSCHs, and the first terminal device receives data transmitted on 4 PSSCHs, so that the second terminal device can determine the number of PSSCHs carrying the data received by the first terminal device according to the different frequency domain resources receiving the first information, and can avoid a phenomenon of demodulation error caused by the fact that the first terminal device does not recognize data transmitted on a certain PSSCH or some PSSCHs, thereby improving accuracy of data transmission.

For example, the first terminal device may further determine, according to the received data, a target sequence group for feeding back the first information from the at least two sequence groups, and then transmit the first information to the second terminal device through the PSFCH on the target frequency domain resource using the target sequence group.

Specifically, the at least two sequence groups may be a sequence group 1 including a sequence with cyclic shift number 1, a sequence with cyclic shift number 4, a sequence with cyclic shift number 7, and a sequence group 2 including a sequence with cyclic shift number 2, a sequence with cyclic shift number 5, a sequence with cyclic shift number 8, and a sequence with cyclic shift number 11. Of course, the at least two sequence groups may include other sequences, for example, a sequence group including a cyclic shift index 1 sequence, a cyclic shift index 2 sequence, a cyclic shift index 3 sequence, and a cyclic shift index 4 sequence.

The first terminal device, upon receiving data transmitted on at least two pschs, determines a target sequence group, such as sequence group 1 or sequence group 2, from the at least two sequence groups, and transmits first information to the second terminal device through the PSFCH on the determined target frequency domain resource using the target sequence group. In this way, the second terminal device determines the number of the PSSCH carrying the data received by the first terminal device according to the frequency domain resource and the sequence group for receiving the first information, so that the phenomenon of demodulation error caused by the fact that the first terminal device does not identify the data transmitted on a certain PSSCH or certain PSSCHs can be avoided, and the accuracy of data transmission can be improved.

In a possible implementation manner, the first information includes 2-bit information, where when first bit information in the 2-bit information is 0, the target sequence group is a first sequence group of the at least two sequence groups, and when the first bit information is 1, the target sequence group is a second sequence group of the at least two sequence groups, where the second sequence group is different from the first sequence group; when second bit information in the 2-bit information is 0, the target frequency domain resource is a first PSFCH frequency domain resource in the multiple PSFCH frequency domain resources, and when the second bit information is 1, the target frequency domain resource is a second PSFCH frequency domain resource in the multiple PSFCH frequency domain resources, where the second PSFCH frequency domain resource is different from the first PSFCH frequency domain resource.

Specifically, the frequency domain resource of the PSFCH corresponding to each psch may occupy 1 or multiple PRBs, and the frequency domain resources occupied by the PSFCH are different, so that the frequency domain resource may represent the value of the second bit information in the first information from the time domain resource of the PSFCH corresponding to the psch occupying multiple PRBs or the different PRBs where the PSFCH resources corresponding to multiple pschs are located.

The first information is composed of 2 bits of information, and the value of the 2 bits of information is used for indicating the number of PSSCH carrying data received by the first terminal equipment. For example: if the first information is "01", it indicates that the number of pschs carrying data received by the first terminal device is 2, if the first information is "10", it indicates that the number of pschs carrying data received by the first terminal device is 3, and if the first information is "11", it indicates that the number of pschs carrying data received by the first terminal device is 4.

If the first terminal equipment receives data transmitted on 2 PSSCHs, the target sequence group is a first sequence group, and the target frequency domain resource is a second PSFCH frequency domain resource; if the first terminal equipment receives data transmitted on the 3 PSSCH, the target sequence group is a second sequence group, and the target frequency domain resource is a first PSFCH frequency domain resource; if the first terminal device receives data transmitted on 4 pschs, the target sequence group is the second sequence group, and the target frequency domain resource is the second PSFCH frequency domain resource. The first sequence group may be sequence group 1, and the second sequence group may be sequence group 2, or the first sequence group may be sequence group 2, and the second sequence group may be sequence group 1; of course, the first sequence group and the second sequence group may be other sequence groups as long as the first sequence group and the second sequence group are different. In addition, the first PSFCH frequency-domain resource may be PRB1 and the second PSFCH frequency-domain resource may be PRB2, or the first PSFCH frequency-domain resource may be PRB2 and the second PSFCH frequency-domain resource may be PRB 1. Of course, the first and second PSFCH frequency domain resources may also be other PSFCH frequency domain resources as long as the first and second PSFCH frequency domain resources are different.

In this embodiment, 2-bit information in the first information is represented by the target sequence group and the target frequency domain resource to indicate the number of pschs carrying data received by the first terminal device, so that the indication manner of the number of pschs is simpler.

For example, the target frequency domain resource may be a resource with the largest identification information among a plurality of PSFCH frequency domain resources corresponding to the n PSSCHs or a resource with the smallest identification information among a plurality of PSFCH frequency domain resources corresponding to the n PSSCHs.

Specifically, fig. 9a is a schematic diagram of a target frequency domain resource, and fig. 9b is another schematic diagram of the target frequency domain resource, as shown in fig. 9a, when the second bit information in the 2-bit information is 0, the target frequency domain resource may be a resource (e.g., PRB2) with the largest identification information among a plurality of PSFCH frequency domain resources, or when the second bit information is 1, the target frequency domain resource may be a resource (e.g., PRB2) with the largest identification information among the plurality of PSFCH frequency domain resources; as shown in fig. 9b, when the second bit information in the 2-bit information is 0, the target frequency-domain resource may be a resource (e.g., PRB1) with the smallest identification information among the plurality of PSFCH frequency-domain resources, or when the second bit information is 1, the target frequency-domain resource may be a resource (e.g., PRB1) with the smallest identification information among the plurality of PSFCH frequency-domain resources.

In this embodiment, 2-bit information in the first information is represented by a target sequence group and a target frequency domain resource, where the target frequency domain resource may be a resource with the largest identification information among multiple PSFCH frequency domain resources corresponding to n PSSCHs or a resource with the smallest identification information among multiple PSFCH frequency domain resources corresponding to n PSSCHs, so as to indicate the number of PSSCHs carrying data received by the first terminal device, and make an indication manner of the number of PSSCHs more flexible.

In another possible implementation manner, the first information indicates that the number of PSSCHs carrying data received by the first terminal device is 2, and a combination of the target sequence group and the target frequency domain resource is a first combination in the combination set; or the first information indicates that the number of PSSCHs carrying data received by the first terminal equipment is 3, and the combination of the target sequence group and the target frequency domain resource is a second combination except the first combination in the combination set; or the first information indicates that the number of PSSCHs carrying data received by the first terminal device is 4, and the combination of the target sequence group and the target frequency domain resource is a third combination except the first combination and the second combination in the combination set; the combination of the target sequence group and the target frequency domain resource included in the combined set includes: the target sequence group is a first sequence group in at least two sequence groups, and the target frequency domain resource is a resource with minimum identification information in the PSFCH frequency domain resources; the target sequence group is a first sequence group in at least two sequence groups, and the target frequency domain resources are resources with the largest identification information in the PSFCH frequency domain resources; the target sequence group is a second sequence group of the at least two sequence groups, and the target frequency domain resource is a resource with minimum identification information in the PSFCH frequency domain resources; the target sequence group is a second sequence group of the at least two sequence groups, and the target frequency domain resource is a resource with the largest identification information in the plurality of PSFCH frequency domain resources.

Specifically, the first combination may be any one of a set of combinations, the second combination may be any one of a set of combinations different from the first combination, and the third combination may be any one of a set of combinations different from the first combination and the second combination.

The first sequence group may be sequence group 1 or sequence group 2, and the second sequence group may be sequence group 1 or sequence group 2, but the first sequence group and the second sequence group may be other sequence groups as long as the first sequence group and the second sequence group are different. The identification information of the frequency domain resources may be understood as a reference number or index number of the frequency domain resources.

In this embodiment, the number of PSSCHs carrying data received by the first terminal device is indicated by different sequence groups and frequency domain resources, so that the indication manner of the number of PSSCHs is more flexible.

Exemplarily, the first information indicates that the number of PSSCHs carrying data received by the first terminal device is 2, the target sequence group is a first sequence group of at least two sequence groups, and the target frequency domain resource is a resource with minimum identification information among a plurality of PSFCH frequency domain resources; or the first information indicates that the number of PSSCHs carrying data received by the first terminal device is 3, the target sequence group is a second sequence group of the at least two sequence groups, and the target frequency domain resource is a resource with minimum identification information in the multiple PSFCH frequency domain resources; or the first information indicates that the number of the pschs carrying the data received by the first terminal device is 4, the target sequence group is a first sequence group of at least two sequence groups, and the target frequency domain resource is a resource with the largest identification information among the multiple PSFCH frequency domain resources.

Specifically, if the first terminal device receives data transmitted on 1 psch, that is, if the decoding result of 1 psch is fed back, the first terminal device generally transmits the first information on the corresponding PSFCH frequency domain resource by using a sequence group including a cyclic shift index 0 sequence, a cyclic shift index 3 sequence, a cyclic shift index 6 sequence, and a cyclic shift index 9 sequence. If the first terminal device receives data transmitted on 2 PSSCHs, that is, when decoding results of the 2 PSSCHs are fed back, the first terminal device uses the first sequence group and transmits the first information through a resource with the minimum identification information in the multiple PSFCH frequency domain resources. If the first terminal device receives the data transmitted on the 3 PSSCHs, that is, if the decoding results of the 3 PSSCHs are fed back, the first terminal device uses the second sequence group and transmits the first information through the resource with the minimum identification information in the multiple PSFCH frequency domain resources. If the first terminal device receives data transmitted on 4 pschs, that is, if decoding results of the 4 pschs are fed back, the first terminal device uses the first sequence group and transmits the first information through a resource with the largest identification information among the multiple PSFCH frequency domain resources.

The first sequence group may be sequence group 1, sequence group 2, or another sequence group, and the second sequence group may be sequence group 1, sequence group 2, or another sequence group, as long as the first sequence group and the second sequence group are different.

In addition, when the first terminal device receives data transmitted on 4 pschs, that is, feeds back decoding results of 4 pschs, the first terminal device may also transmit the first information through a resource with the largest identification information among the multiple PSFCH frequency-domain resources by using the second sequence group

For example, fig. 10a is another diagram of the target frequency domain resource when the number of the pschs is 2, fig. 10b is another diagram of the target frequency domain resource when the number of the pschs is 3, and fig. 10c is another diagram of the target frequency domain resource when the number of the pschs is 4. As shown in fig. 10a, it is assumed that the first sequence group is sequence group 1 and the second sequence group is sequence group 2. If the first terminal device receives data transmitted on 2 pschs, the first terminal device may transmit the first information to the second terminal device through the PSFCH using sequence set 1 and a resource (e.g., PRB1) with the smallest identification information among the multiple PSFCH frequency-domain resources. As shown in fig. 10b, if the first terminal device receives data transmitted on 3 PSSCHs, the first terminal device may transmit the first information to the second terminal device through the PSFCH using sequence set 2 and the resource with the smallest identification information (e.g., PRB1) in the multiple PSFCH frequency domain resources. As shown in fig. 10c, if the first terminal device receives data transmitted on 4 PSSCHs, the first terminal device may transmit the first information to the second terminal device through the PSFCH by using sequence set 1 and a resource (e.g., PRB4) with the largest identification information among the multiple PSFCH frequency-domain resources. Therefore, the second terminal equipment can determine the number of PSSCH bearing the data received by the first terminal equipment according to the target frequency domain resource receiving the first information.

In this embodiment, the first terminal device indicates, through the first sequence group or the second sequence group and the frequency domain resource with the minimum or the maximum identification information among the multiple PSFCH frequency domain resources, that the first terminal device receives data transmitted on 2 PSSCHs, the first terminal device receives data transmitted on 3 PSSCHs, and the first terminal device receives data transmitted on 4 PSSCHs, so that the second terminal device can determine the number of PSSCHs carrying the data received by the first terminal device according to the different sequence groups and frequency domain resources receiving the first information, and can avoid a phenomenon of demodulation error caused by the fact that the first terminal device does not recognize data transmitted on a certain PSSCH or on certain PSSCHs, thereby improving accuracy of data transmission.

Further, when a plurality of pschs are transmitted by using different slots of the same sub-channel, it is considered that the frequency domains are correspondingly consistent due to the fact that the sub-channels are the same, and therefore, a phenomenon that data transmitted on one psch is not identified and other pschs are correctly demodulated occurs with a very small probability. At this time, it may be considered that a sequence group different from the result of feeding back one psch is used to represent a result obtained after "anding" each psch decoding result, that is, feeding back data transmitted on multiple pschs received by the first terminal device, where the target frequency domain resource may select that the identification information of the PRB occupied by each PFSCH is the minimum or the maximum.

Further, the first terminal device sends the first information through a preset sequence group 1 or sequence group 2, that is, the sequence group 1 or sequence group 2 is used to carry feedback results of "and" taking of multiple pschs, so as to feed back data transmitted on multiple pschs received by the first terminal device, where the sequence group 1 or sequence group 2 is different from a sequence group that feeds back a decoding result of one psch. If multiple PSSCHs are transmitted on the same sub-channel, the first information is selected to be transmitted on PRB1 in sequence group 1 or sequence group 2. For example: fig. 11a is another schematic diagram of the target frequency domain resource, and as shown in fig. 11a, if the pschs include psch 1 and psch 2, and the pschs 1 and psch 2 transmit on the same sub-channel, the first information is selected to be transmitted on the PRB1 in sequence set 1 or sequence set 2.

Further, the first terminal device may also use a preset sequence group, for example, a sequence group including a cyclic shift index 0 sequence, a cyclic shift index 3 sequence, a cyclic shift index 6 sequence, and a cyclic shift index 9 sequence is used to transmit the first information, that is, to carry bits in the PSFCH, at this time, only different frequency domain resources may be used to indicate how many pschs are "anded" with the result, that is, to feed back data transmitted on the multiple pschs received by the first terminal device.

Fig. 11b is a further schematic diagram of the target frequency-domain resource, as shown in fig. 11b, in a possible implementation, the target frequency-domain resource may be a resource with the largest identification information among a plurality of PSFCH frequency-domain resources, that is, a PRB (e.g., PRB2) with the largest identification information among all the PSFCH resources is used to transmit the first information, so as to carry an and result, thereby indicating the number of PSSCHs carrying data received by the first terminal device.

In this embodiment, since the first information is transmitted by using the sequence group including the cyclic shift reference numeral 0 sequence, the cyclic shift reference numeral 3 sequence, the cyclic shift reference numeral 6 sequence, the cyclic shift reference numeral 9 sequence, and the PRB with the largest identification information among all the PSFCH resources, the manner of indicating the number of the PSSCHs is more flexible.

In the communication method provided by the embodiment of the present application, a first terminal device receives data sent by a second terminal device through n pschs, respectively, where n is 2,3, or 4, and then the first terminal device determines, according to the received data, a target frequency domain resource for feeding back first information from multiple PSFCH frequency domain resources corresponding to the n pschs, and sends the first information to the second terminal device through the PSFCH on the target frequency domain resource, where the first information is used to indicate the number of PSSCHs carrying the data received by the first terminal device. After receiving the data sent by the second terminal device, the first terminal device can feed back the number of PSSCH carrying the data received by the first terminal device to the second terminal device through the target frequency domain resource, so that the phenomenon of demodulation error caused by that the first terminal device does not identify the data transmitted on a certain PSSCH or certain PSSCH can be avoided, and the accuracy of data transmission can be improved.

Fig. 12 is a schematic structural diagram of a communication device 10 according to an embodiment of the present application, please refer to fig. 12, where the communication device 10 may include:

a receiving unit 11, configured to receive data sent by a second terminal device through n physical direct link shared channels PSSCH, where n is 2,3, or 4;

a processing unit 12, configured to determine, according to the received data, a target frequency domain resource for feeding back the first information from multiple physical direct link feedback channel PSFCH frequency domain resources corresponding to the n PSSCHs;

a sending unit 13, configured to send, on the target frequency domain resource, the first information to the second terminal device through a PSFCH, where the first information is used to indicate the number of PSSCHs carrying data received by the communication apparatus.

In the communication apparatus provided in this embodiment of the present application, the receiving unit 11 receives data sent by the second terminal device through n pschs, where n is 2,3, or 4, then the processing unit 12 determines, according to the received data, a target frequency domain resource for feeding back first information from multiple PSFCH frequency domain resources corresponding to the n pschs, and the sending unit 13 sends the first information to the second terminal device through the PSFCH on the target frequency domain resource, where the first information is used to indicate the number of PSSCHs carrying the data received by the first terminal device. After receiving the data sent by the second terminal device, the first terminal device can feed back the number of PSSCH carrying the data received by the first terminal device to the second terminal device through the target frequency domain resource, so that the phenomenon of demodulation error caused by that the first terminal device does not identify the data transmitted on a certain PSSCH or certain PSSCH can be avoided, and the accuracy of data transmission can be improved.

Illustratively, the sending unit 13 is specifically configured to:

determining a target sequence group for feeding back the first information from at least two sequence groups according to the received data;

and on the target frequency domain resource, using the target sequence group to send the first information to the second terminal equipment through the PSFCH.

Illustratively, the first information includes 2-bit information; when first bit information in the 2-bit information is 0, the target sequence group is a first sequence group in the at least two sequence groups, and when the first bit information is 1, the target sequence group is a second sequence group in the at least two sequence groups, and the second sequence group is different from the first sequence group;

when second bit information in the 2-bit information is 0, the target frequency domain resource is a first PSFCH frequency domain resource in the multiple PSFCH frequency domain resources, and when the second bit information is 1, the target frequency domain resource is a second PSFCH frequency domain resource in the multiple PSFCH frequency domain resources, where the second PSFCH frequency domain resource is different from the first PSFCH frequency domain resource.

Illustratively, the target frequency domain resource is a resource with the largest identification information among a plurality of PSFCH frequency domain resources corresponding to the n PSSCHs or a resource with the smallest identification information among a plurality of PSFCH frequency domain resources corresponding to the n PSSCHs.

Exemplarily, the first information indicates that the number of pschs carrying data received by the first terminal device is 2, and a combination of the target sequence group and the target frequency domain resource is a first combination in a combination set; alternatively, the first and second electrodes may be,

the first information indicates that the number of PSSCHs carrying data received by the first terminal device is 3, and the combination of the target sequence group and the target frequency domain resource is a second combination except the first combination in the combination set; alternatively, the first and second electrodes may be,

the first information indicates that the number of PSSCHs carrying data received by the first terminal device is 4, and the combination of the target sequence group and the target frequency domain resource is a third combination in the combination set except the first combination and the second combination;

wherein a combination of the target sequence group and the target frequency domain resource included in the combined set is: the target sequence group is a first sequence group in the at least two sequence groups, and the target frequency domain resource is a resource with minimum identification information in the plurality of PSFCH frequency domain resources; the target sequence group is a first sequence group in the at least two sequence groups, and the target frequency domain resource is a resource with the largest identification information in the plurality of PSFCH frequency domain resources; the target sequence group is a second sequence group of the at least two sequence groups, and the target frequency domain resource is a resource with minimum identification information in the plurality of PSFCH frequency domain resources; the target sequence group is a second sequence group of the at least two sequence groups, and the target frequency domain resource is a resource with the largest identification information in the plurality of PSFCH frequency domain resources.

Exemplarily, the first information indicates that the number of pschs carrying data received by the first terminal device is 2, the target sequence group is a first sequence group of the at least two sequence groups, and the target frequency domain resource is a resource with minimum identification information among the multiple PSFCH frequency domain resources; alternatively, the first and second electrodes may be,

the first information indicates that the number of PSSCHs carrying data received by the first terminal device is 3, the target sequence group is a second sequence group of the at least two sequence groups, and the target frequency domain resource is a resource with minimum identification information among the multiple PSFCH frequency domain resources; alternatively, the first and second electrodes may be,

the first information indicates that the number of PSSCHs carrying data received by the first terminal device is 4, the target sequence group is a first sequence group of the at least two sequence groups, and the target frequency domain resource is a resource with the largest identification information among the multiple PSFCH frequency domain resources.

Exemplarily, the first information indicates that the number of pschs carrying data received by the first terminal device is 2, and the target frequency domain resource is a first frequency domain resource of the multiple PSFCH frequency domain resources; alternatively, the first and second electrodes may be,

the first information indicates that the number of PSSCH carrying data received by the first terminal device is 3, and the target frequency domain resource is a second frequency domain resource except the first frequency domain resource in the PSFCH frequency domain resources; alternatively, the first and second electrodes may be,

the first information indicates that the number of PSSCHs carrying data received by the first terminal device is 4, and the target frequency domain resource is a third frequency domain resource of the PSFCH frequency domain resources except the first frequency domain resource and the second frequency domain resource.

Exemplarily, the first information indicates that the number of pschs carrying data received by the first terminal device is 2, and the target frequency domain resource is a resource with minimum identification information among the multiple PSFCH frequency domain resources; alternatively, the first and second electrodes may be,

the first information indicates that the number of PSSCH carrying data received by the first terminal device is 3, and the target frequency domain resource is the resource with the largest identification information in the PSFCH frequency domain resources; alternatively, the first and second electrodes may be,

the first information indicates that the number of PSSCHs carrying data received by the first terminal device is 4, and the target frequency domain resource is a resource with identification information of which the number is the second smallest or the second largest in the plurality of PSFCH frequency domain resources.

Exemplarily, the first information indicates that the number of pschs carrying data received by the first terminal device is 2, and the target frequency domain resource is a resource arranged first in the multiple PSFCH frequency domain resources according to a sequence of identification information from small to large; alternatively, the first and second electrodes may be,

the first information indicates that the number of PSSCH carrying data received by the first terminal device is 3, and the target frequency domain resource is a resource arranged in the second PSFCH frequency domain resources from small to large according to the identification information; alternatively, the first and second electrodes may be,

the first information indicates that the number of PSSCHs carrying data received by the first terminal device is 4, and the target frequency domain resource is a third PSFCH frequency domain resource in the plurality of PSFCH frequency domain resources in the descending order of the identification information.

Exemplarily, the first information indicates that the number of pschs carrying data received by the first terminal device is 2, and the target frequency domain resource is a resource arranged first in the multiple PSFCH frequency domain resources according to a descending order of identification information; alternatively, the first and second electrodes may be,

the first information indicates that the number of PSSCH carrying data received by the first terminal device is 3, and the target frequency domain resource is a resource arranged in a second PSFCH frequency domain resources according to the descending order of identification information; alternatively, the first and second electrodes may be,

Illustratively, the sequence group includes a sequence group including a sequence denoted by cyclic shift number 1, a sequence denoted by cyclic shift number 4, a sequence denoted by cyclic shift number 7, a sequence denoted by cyclic shift number 10, and a sequence group including a sequence denoted by cyclic shift number 2, a sequence denoted by cyclic shift number 5, a sequence denoted by cyclic shift number 8, and a sequence denoted by cyclic shift number 11.

The communication apparatus 10 shown in the embodiment of the present application can execute the technical solution of the communication method shown in any one of the above embodiments, and the implementation principle and the beneficial effect thereof are similar and will not be described herein again.

It should be noted that the division of each unit of the above apparatus is only a logical division, and the actual implementation may be wholly or partially integrated into one physical entity, or may be physically separated. And these units can be implemented entirely in software, invoked by a processing element; or may be implemented entirely in hardware; and part of the units can be realized in the form of calling by a processing element through software, and part of the units can be realized in the form of hardware. For example, the transmitting unit may be a processing element separately set up, or may be implemented by being integrated in a chip of the communication apparatus, or may be stored in a memory of the communication apparatus in the form of a program, and the processing element of the communication apparatus calls and executes the function of the transmitting unit. The other units are implemented similarly. In addition, all or part of the units can be integrated together or can be independently realized. The processing element described herein may be an integrated circuit having signal processing capabilities. In implementation, the steps of the method or the units above may be implemented by hardware integrated logic circuits in a processor element or instructions in software. Further, the above transmission unit is a unit that controls transmission, and information can be transmitted through a transmission device of the communication device, such as an antenna and a radio frequency device.

The above units may be one or more integrated circuits configured to implement the above methods, for example: one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), among others. For another example, when the above units are implemented in the form of a processing element scheduler, the processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor capable of calling programs. As another example, these units may be integrated together and implemented in the form of a system-on-a-chip (SOC).

Fig. 13 is a schematic structural diagram of a communication device 20 according to an embodiment of the present application, please refer to fig. 13, where the communication device 20 may include:

a sending unit 21, configured to send data to a first terminal device through n physical direct link shared channels PSSCH, where n is 2,3, or 4;

a receiving unit 22, configured to receive, on a target frequency domain resource, first information sent by the first terminal device through a PSFCH (physical direct link feedback channel), where the target frequency domain resource is determined by the first terminal device according to received data from multiple PSFCH frequency domain resources corresponding to the n PSSCHs, and the first information is used to indicate the number of PSSCHs carrying data received by the first terminal device.

Illustratively, the receiving unit 22 is specifically configured to:

and receiving the first information sent by the first terminal equipment through the PSFCH by using a target sequence group on the target frequency domain resource, wherein the target sequence group is determined by the first terminal equipment from at least two sequence groups according to received data.

The communication device 20 shown in the embodiment of the present application can execute the technical solution of the communication method shown in any one of the above embodiments, and the implementation principle and the beneficial effect thereof are similar and will not be described herein again.

Fig. 14 is a schematic structural diagram of a terminal device according to an embodiment of the present application. As shown in fig. 14, the terminal device includes: processor 110, memory 120, transceiver 130. The transceiver 130 may be connected to an antenna. In the downlink direction, the transceiver 130 receives information transmitted by the base station through the antenna and transmits the information to the processor 110 for processing. In the uplink direction, the processor 110 processes data of the terminal and transmits the processed data to the base station through the transceiver 130.

The memory 120 is used for storing a program for implementing the above method embodiment, or each unit in the embodiment shown in fig. 5, and the processor 110 calls the program to execute the operation of the above method embodiment to implement each unit shown in fig. 5.

Alternatively, part or all of the above units may be implemented by being embedded in a chip of the terminal device in the form of an integrated circuit. And they may be implemented separately or integrated together. That is, the above units may be configured as one or more integrated circuits implementing the above methods, for example: one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), among others.

The present application further provides a communication system comprising the first terminal device as described in any of the above embodiments and the second terminal device as described in any of the above embodiments.

The present application also provides a storage medium comprising: a readable storage medium and a computer program for implementing the communication method provided by any of the foregoing embodiments.

The present application also provides a program product comprising a computer program (i.e. executing instructions), the computer program being stored in a readable storage medium. The computer program can be read from a readable storage medium by at least one processor of the first terminal device, and the computer program can be executed by the at least one processor to enable the first terminal device to implement the communication method provided by the foregoing various embodiments.

An embodiment of the present application further provides a communication apparatus, which includes at least one storage element and at least one processing element, where the at least one storage element is used to store a program, and when the program is executed, the communication apparatus is caused to perform the operation of the first terminal device in any of the above embodiments.

The present application also provides a program product comprising a computer program (i.e. executing instructions), the computer program being stored in a readable storage medium. The computer program can be read from a readable storage medium by at least one processor of the second terminal device, and the computer program can be executed by the at least one processor to cause the network device to implement the communication method provided by the foregoing various embodiments.

An embodiment of the present application further provides a communication apparatus, which includes at least one storage element and at least one processing element, where the at least one storage element is used to store a program, and when the program is executed, the communication apparatus is caused to perform the operation of the second terminal device in any of the above embodiments.

In combination with the above, the present application also provides the following embodiments:

embodiment 1, a communication method, wherein, applied to a first terminal device, the method includes:

according to the received data, determining target frequency domain resources for feeding back first information from a plurality of physical direct connection link feedback channel PSFCH frequency domain resources corresponding to the n PSSCHs;

and sending the first information to the second terminal equipment through a PSFCH on the target frequency domain resource, wherein the first information is used for indicating the number of PSSCH carrying data received by the first terminal equipment.

Embodiment 2 is the method according to embodiment 1, wherein the sending the first information to the second terminal device through a PSFCH on the target frequency domain resource includes:

Embodiment 3 the method of embodiment 2, wherein the first information comprises 2 bits of information; when first bit information in the 2-bit information is 0, the target sequence group is a first sequence group in the at least two sequence groups, and when the first bit information is 1, the target sequence group is a second sequence group in the at least two sequence groups, and the second sequence group is different from the first sequence group;

Embodiment 4 is the method according to embodiment 3, wherein the target frequency domain resource is a resource with the largest identification information among a plurality of PSFCH frequency domain resources corresponding to the n PSSCHs or a resource with the smallest identification information among a plurality of PSFCH frequency domain resources corresponding to the n PSSCHs.

Embodiment 5 the method of embodiment 2, wherein,

the first information indicates that the number of PSSCH carrying data received by the first terminal device is 2, and the combination of the target sequence group and the target frequency domain resource is a first combination in a combination set; alternatively, the first and second electrodes may be,

Embodiment 6 the method of embodiment 5, wherein,

the first information indicates that the number of PSSCHs carrying data received by the first terminal device is 2, the target sequence group is a first sequence group of the at least two sequence groups, and the target frequency domain resource is a resource with minimum identification information among the multiple PSFCH frequency domain resources; alternatively, the first and second electrodes may be,

Embodiment 7 the method of embodiment 1 or embodiment 2, wherein,

the first information indicates that the number of PSSCH carrying data received by the first terminal device is 2, and the target frequency domain resource is a first frequency domain resource in the PSFCH frequency domain resources; alternatively, the first and second electrodes may be,

Embodiment 8 the method of embodiment 7, wherein,

the first information indicates that the number of PSSCH carrying data received by the first terminal device is 2, and the target frequency domain resource is the resource with the minimum identification information in the PSFCH frequency domain resources; alternatively, the first and second electrodes may be,

Embodiment 9 the method of embodiment 7, wherein,

the first information indicates that the number of PSSCH carrying data received by the first terminal device is 2, and the target frequency domain resource is a resource arranged in the first PSFCH frequency domain resources from small to large according to the identification information; alternatively, the first and second electrodes may be,

Embodiment 10 the method of embodiment 7, wherein,

the first information indicates that the number of PSSCH carrying data received by the first terminal device is 2, and the target frequency domain resource is a resource arranged in the first PSFCH frequency domain resources from large to small according to identification information; alternatively, the first and second electrodes may be,

Embodiment 11, the method according to embodiment 2, embodiment 3, embodiment 4, embodiment 5, embodiment 6, embodiment 7, embodiment 8, embodiment 9, or embodiment 10, wherein the sequence group includes a sequence with cyclic shift number 1, a sequence with cyclic shift number 4, a sequence with cyclic shift number 7, a sequence group with cyclic shift number 10, and a sequence group including a sequence with cyclic shift number 2, a sequence with cyclic shift number 5, a sequence with cyclic shift number 8, and a sequence with cyclic shift number 11.

Embodiment 12, a communication method, applied to a second terminal device, includes:

receiving, by a physical direct link feedback channel (PSFCH) on a target frequency domain resource, first information sent by the first terminal device, where the target frequency domain resource is determined by the first terminal device from multiple PSFCH frequency domain resources corresponding to the n PSSCHs according to received data, and the first information is used to indicate the number of PSSCHs carrying the data received by the first terminal device.

Embodiment 13 and the method according to embodiment 12, wherein the receiving, on the target frequency domain resource, the first information sent by the first terminal device through a physical direct link feedback channel PSFCH includes:

Embodiment 14 the method of embodiment 13, wherein the first information comprises 2 bits of information; when first bit information in the 2-bit information is 0, the target sequence group is a first sequence group in the at least two sequence groups, and when the first bit information is 1, the target sequence group is a second sequence group in the at least two sequence groups, and the second sequence group is different from the first sequence group;

Embodiment 15 is the method according to embodiment 14, wherein the target frequency domain resource is a resource with the largest identification information among a plurality of PSFCH frequency domain resources corresponding to the n PSSCHs or a resource with the smallest identification information among a plurality of PSFCH frequency domain resources corresponding to the n PSSCHs.

Embodiment 16 the method of embodiment 12, wherein,

Embodiment 17 the method of embodiment 16, wherein,

Embodiment 18, the method of embodiment 12 or embodiment 13, wherein,

Embodiment 19 the method of embodiment 18, wherein,

Embodiment 20 the method of embodiment 18, wherein,

Embodiment 21 the method of embodiment 18, wherein,

Embodiment 22, the method according to embodiment 13, embodiment 14, embodiment 15, embodiment 16, embodiment 17, embodiment 18, embodiment 19, embodiment 20, or embodiment 21, wherein the sequence group includes a sequence with cyclic shift number 1, a sequence with cyclic shift number 4, a sequence with cyclic shift number 7, a sequence group with cyclic shift number 10, and a sequence group including a sequence with cyclic shift number 2, a sequence with cyclic shift number 5, a sequence with cyclic shift number 8, and a sequence with cyclic shift number 11.

Embodiment 23, a communication apparatus, comprising:

a processing unit, configured to determine, according to the received data, a target frequency domain resource for feeding back the first information from multiple physical direct link feedback channel PSFCH frequency domain resources corresponding to the n PSSCHs;

a sending unit, configured to send, on the target frequency domain resource, the first information to the second terminal device through a PSFCH, where the first information is used to indicate the number of PSSCHs carrying data received by the communication apparatus.

Embodiment 24 and the apparatus according to embodiment 23, wherein the sending unit is specifically configured to:

Embodiment 25 the apparatus of embodiment 24, wherein the first information comprises 2 bits of information; when first bit information in the 2-bit information is 0, the target sequence group is a first sequence group in the at least two sequence groups, and when the first bit information is 1, the target sequence group is a second sequence group in the at least two sequence groups, and the second sequence group is different from the first sequence group;

Embodiment 26 and the apparatus according to embodiment 25, wherein the target frequency domain resource is a resource with the largest identification information among a plurality of PSFCH frequency domain resources corresponding to the n PSSCHs or a resource with the smallest identification information among a plurality of PSFCH frequency domain resources corresponding to the n PSSCHs.

Embodiment 27 the apparatus of embodiment 24, wherein,

Embodiment 28 the apparatus of embodiment 27, wherein,

Embodiment 29, the apparatus of embodiment 23 or embodiment 24, wherein,

Embodiment 30 the apparatus of embodiment 29, wherein,

Embodiment 31 the apparatus of embodiment 29, wherein,

Embodiment 32 the apparatus of embodiment 29, wherein,

Embodiment 33, the apparatus according to embodiment 24, embodiment 25, embodiment 26, embodiment 27, embodiment 28, embodiment 29, embodiment 30, embodiment 31, or embodiment 32, wherein the sequence group includes a sequence with cyclic shift number 1, a sequence with cyclic shift number 4, a sequence with cyclic shift number 7, a sequence group with cyclic shift number 10, and a sequence group including a sequence with cyclic shift number 2, a sequence with cyclic shift number 5, a sequence with cyclic shift number 8, and a sequence with cyclic shift number 11.

Embodiment 34, a communication device, comprising:

a receiving unit, configured to receive, on a target frequency domain resource, first information sent by the first terminal device through a PSFCH (physical direct link feedback channel), where the target frequency domain resource is determined by the first terminal device according to received data from multiple PSFCH frequency domain resources corresponding to the n PSSCHs, and the first information is used to indicate the number of PSSCHs carrying data received by the first terminal device.

Embodiment 35 the apparatus of embodiment 34, wherein the receiving unit is specifically configured to:

Embodiment 36 the apparatus of embodiment 35, wherein the first information comprises 2 bits of information; when first bit information in the 2-bit information is 0, the target sequence group is a first sequence group in the at least two sequence groups, and when the first bit information is 1, the target sequence group is a second sequence group in the at least two sequence groups, and the second sequence group is different from the first sequence group;

Embodiment 37 and the apparatus according to embodiment 36, wherein the target frequency domain resource is a resource with the largest identification information among a plurality of PSFCH frequency domain resources corresponding to the n PSSCHs or a resource with the smallest identification information among a plurality of PSFCH frequency domain resources corresponding to the n PSSCHs.

Embodiment 38 the apparatus of embodiment 35, wherein,

Embodiment 39 the apparatus of embodiment 38, wherein,

Embodiment 40 the apparatus of embodiment 34 or embodiment 35, wherein,

Embodiment 41 the apparatus of embodiment 40, wherein,

Embodiment 42 the apparatus of embodiment 40, wherein,

Embodiment 43 the apparatus of embodiment 40, wherein,

Embodiment 44, the apparatus according to embodiment 35, embodiment 36, embodiment 37, embodiment 38, embodiment 39, embodiment 40, embodiment 41, embodiment 42, or embodiment 43, wherein the sequence group includes a sequence with cyclic shift number 1, a sequence with cyclic shift number 4, a sequence with cyclic shift number 7, a sequence group with cyclic shift number 10, and a sequence group including a sequence with cyclic shift number 2, a sequence with cyclic shift number 5, a sequence with cyclic shift number 8, and a sequence with cyclic shift number 11.

Embodiment 45, a communication system, wherein the communication system comprises a first terminal device and a second terminal device.

Wherein, first terminal equipment includes:

a sending unit, configured to send, on the target frequency domain resource, the first information to the second terminal device through a PSFCH, where the first information is used to indicate the number of PSSCHs carrying data received by the communication apparatus;

wherein the second terminal device includes:

Embodiment 46 and the system according to embodiment 45, wherein the sending unit of the first terminal device is specifically configured to:

Embodiment 47 the system of embodiment 46, wherein the first information comprises 2 bits of information; when first bit information in the 2-bit information is 0, the target sequence group is a first sequence group in the at least two sequence groups, and when the first bit information is 1, the target sequence group is a second sequence group in the at least two sequence groups, and the second sequence group is different from the first sequence group;

Embodiment 48, the system according to embodiment 47, wherein the target frequency domain resource is a resource with the largest identification information among a plurality of PSFCH frequency domain resources corresponding to the n PSSCHs or a resource with the smallest identification information among a plurality of PSFCH frequency domain resources corresponding to the n PSSCHs.

Embodiment 49 the system of embodiment 46, wherein,

Embodiment 50 is the system of embodiment 49, wherein the first information indicates that the number of pschs carrying data received by the first terminal device is 2, the target sequence group is a first sequence group of the at least two sequence groups, and the target frequency domain resource is a resource with minimum identification information among the multiple PSFCH frequency domain resources; alternatively, the first and second electrodes may be,

Embodiment 50, the system according to embodiment 45 or embodiment 46, wherein the first information indicates that the number of pschs carrying data received by the first terminal device is 2, and the target frequency-domain resource is a first frequency-domain resource of the plurality of PSFCH frequency-domain resources; alternatively, the first and second electrodes may be,

Embodiment 51 the system of embodiment 50, wherein,

Embodiment 52 the system of embodiment 50, wherein,

Embodiment 53 the system of embodiment 50, wherein,

Embodiment 54, the system according to embodiment 46, embodiment 47, embodiment 48, embodiment 49, embodiment 50, embodiment 51, embodiment 52, or embodiment 53, wherein the sequence group includes a sequence with cyclic shift number 1, a sequence with cyclic shift number 4, a sequence with cyclic shift number 7, a sequence group with cyclic shift number 10, and a sequence group including a sequence with cyclic shift number 2, a sequence with cyclic shift number 5, a sequence with cyclic shift number 8, and a sequence with cyclic shift number 11.

Embodiment 55, the system according to embodiment 45, wherein the receiving unit of the second terminal device is specifically configured to:

Embodiment 56 the system of embodiment 55, wherein the first information comprises 2 bits of information; when first bit information in the 2-bit information is 0, the target sequence group is a first sequence group in the at least two sequence groups, and when the first bit information is 1, the target sequence group is a second sequence group in the at least two sequence groups, and the second sequence group is different from the first sequence group;

Embodiment 57 is the system according to embodiment 56, wherein the target frequency domain resource is a resource with the largest identification information among a plurality of PSFCH frequency domain resources corresponding to the n PSSCHs or a resource with the smallest identification information among a plurality of PSFCH frequency domain resources corresponding to the n PSSCHs.

Embodiment 58, the system according to embodiment 55, wherein the first information indicates that the number of pschs carrying data received by the first terminal device is 2, and a combination of the target sequence group and the target frequency domain resource is a first combination in a combination set; alternatively, the first and second electrodes may be,

Embodiment 59 the system of embodiment 58, wherein,

Embodiment 60, the system of embodiment 45 or embodiment 55, wherein,

Embodiment 61 the system of embodiment 60, wherein,

Embodiment 62 the system of embodiment 60, wherein,

Embodiment 63 the system of embodiment 60, wherein,

Embodiment 64, the system according to embodiment 55, embodiment 56, embodiment 57, embodiment 58, embodiment 59, embodiment 60, embodiment 61 or embodiment 62, wherein the sequence group includes a sequence group including a sequence with cyclic shift number 1, a sequence with cyclic shift number 4, a sequence with cyclic shift number 7, a sequence group including a sequence with cyclic shift number 10, and a sequence group including a sequence with cyclic shift number 2, a sequence with cyclic shift number 5, a sequence with cyclic shift number 8, a sequence with cyclic shift number 11.

Embodiment 65, a terminal device, comprising:

a processor;

a memory; and

a computer program;

wherein the computer program is stored in the memory and configured to be executed by the processor, the computer program comprising instructions for performing the method of any of embodiments 1-11.

Embodiment 66, a terminal device, comprising:

a processor;

a memory; and

a computer program;

wherein the computer program is stored in the memory and configured to be executed by the processor, the computer program comprising instructions for performing the method of any of embodiments 12-22.

Embodiment 67 is a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program that causes a terminal device to perform the method according to any one of embodiments 1 to 11.

Embodiment 68 is a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program that causes a terminal device to perform the method according to any one of embodiments 12 to 22.

Embodiment 69 a computer program product comprising instructions which, when run on a computer, cause the computer to perform the communication method according to any one of embodiments 1 to 11.

Embodiment 70, a computer program product comprising instructions which, when run on a computer, cause the computer to perform the communication method according to any of embodiments 12-22.

Embodiment 71, a communication chip, the chip being connected to a memory, or the chip having a memory integrated thereon, wherein when the software program stored in the memory is executed, the communication chip implements the communication method according to any one of embodiments 1 to 11.

Embodiment 72 is a communication chip, the chip being connected to a memory, or having a memory integrated thereon, wherein when a software program stored in the memory is executed, the communication chip implements the communication method according to any of embodiments 12 to 22.

All or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The aforementioned program may be stored in a readable memory. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned memory (storage medium) includes: read-only memory (ROM), RAM, flash memory, hard disk, solid state disk, magnetic tape (magnetic tape), floppy disk (optical disc), and any combination thereof.

Claims

1. A communication method, applied to a first terminal device, the method comprising:

2. The method according to claim 1, wherein said transmitting the first information to the second terminal device over the PSFCH on the target frequency domain resource comprises:

3. A communication method, applied to a second terminal device, the method comprising:

4. The method according to claim 3, wherein the receiving, on the target frequency domain resource, the first information sent by the first terminal device through a physical direct link feedback channel (PSFCH) comprises:

5. The method of claim 2 or 4, wherein the first information comprises 2-bit information; when first bit information in the 2-bit information is 0, the target sequence group is a first sequence group in the at least two sequence groups, and when the first bit information is 1, the target sequence group is a second sequence group in the at least two sequence groups, and the second sequence group is different from the first sequence group;

6. The method of claim 5, wherein the target frequency domain resource is a resource with the largest identification information among a plurality of PSFCH frequency domain resources corresponding to the n PSSCHs or a resource with the smallest identification information among a plurality of PSFCH frequency domain resources corresponding to the n PSSCHs.

7. The method according to claim 2 or 4,

8. The method of claim 7,

9. The method according to any one of claims 1 to 4,

10. The method of claim 9,

11. The method of claim 9,

12. The method of claim 9,

13. The method according to any one of claims 2 and 4 to 8, wherein the sequence group comprises a sequence group including a sequence with cyclic shift number 1, a sequence with cyclic shift number 4, a sequence with cyclic shift number 7, a sequence with cyclic shift number 10, and a sequence group including a sequence with cyclic shift number 2, a sequence with cyclic shift number 5, a sequence with cyclic shift number 8, and a sequence with cyclic shift number 11.

14. A communications apparatus, comprising:

15. The apparatus according to claim 14, wherein the sending unit is specifically configured to:

16. A communications apparatus, comprising:

17. The apparatus according to claim 16, wherein the receiving unit is specifically configured to:

18. The apparatus of claim 15 or 17, wherein the first information comprises 2-bit information; when first bit information in the 2-bit information is 0, the target sequence group is a first sequence group in the at least two sequence groups, and when the first bit information is 1, the target sequence group is a second sequence group in the at least two sequence groups, and the second sequence group is different from the first sequence group;

19. The apparatus of claim 18, wherein the target frequency domain resource is a resource with the largest identification information among a plurality of PSFCH frequency domain resources corresponding to the n PSSCHs or a resource with the smallest identification information among a plurality of PSFCH frequency domain resources corresponding to the n PSSCHs.

20. The apparatus of claim 15 or 17,

the first information indicates that the number of PSSCH carrying data received by first terminal equipment is 2, and the combination of the target sequence group and the target frequency domain resource is a first combination in a combination set; alternatively, the first and second electrodes may be,

21. The apparatus of claim 20,

22. The apparatus according to any one of claims 14 to 17,

the first information indicates that the number of PSSCH carrying data received by first terminal equipment is 2, and the target frequency domain resource is a first frequency domain resource in the PSFCH frequency domain resources; alternatively, the first and second electrodes may be,

23. The apparatus of claim 22,

24. The apparatus of claim 22,

25. The apparatus of claim 22,

26. The apparatus according to any of claims 15 and 17-21, wherein the sequence group comprises a sequence group comprising a sequence with cyclic shift number 1, a sequence with cyclic shift number 4, a sequence with cyclic shift number 7, a sequence with cyclic shift number 10, and a sequence group comprising a sequence with cyclic shift number 2, a sequence with cyclic shift number 5, a sequence with cyclic shift number 8, and a sequence with cyclic shift number 11.

27. A communication system comprising a communication device according to any of claims 14, 15, 18-26 and a communication device according to any of claims 16-26.

28. A terminal device, comprising:

a processor;

a memory; and

a computer program;

wherein the computer program is stored in the memory and configured to be executed by the processor, the computer program comprising instructions for performing the method of any of claims 1-13.

29. A computer-readable storage medium, characterized in that it stores a computer program that causes a terminal device to execute the method of any one of claims 1-13.