CN113518440A - Method for sending and receiving feedback information and communication device - Google Patents

Method for sending and receiving feedback information and communication device Download PDF

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Publication number
CN113518440A
CN113518440A CN202010280609.4A CN202010280609A CN113518440A CN 113518440 A CN113518440 A CN 113518440A CN 202010280609 A CN202010280609 A CN 202010280609A CN 113518440 A CN113518440 A CN 113518440A
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data
psfchs
feedback information
carrying
psfch
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杨帆
黎超
张茜
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0473—Wireless resource allocation based on the type of the allocated resource the resource being transmission power
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria

Abstract

A method for sending and receiving feedback information and a communication device relate to the fields of Internet of vehicles, intelligent driving, auxiliary driving, intelligent Internet of vehicles, V2X and the like. The method comprises the following steps: receiving N data on N PSSCHs, and sending M feedback information on M PSFCHs, wherein the M feedback information corresponds to M data in the N data, M is the minimum value of N, K and Q, or M is the smaller value of N and K, or M is the smaller value of N and Q, and K is the maximum value of the number of PSFCHs which bear the feedback information and are determined according to the terminal capability; q is the maximum value of the number of PSFCHs carrying feedback information when maximum transmit power is employed. The technical scheme is beneficial to improving the feedback efficiency of the transmitted data and reducing the possibility that the feedback of the data exceeds the capability of the terminal.

Description

Method for sending and receiving feedback information and communication device
Technical Field
The present application relates to the field of communications technologies, and in particular, to a method and a communications apparatus for sending and receiving feedback information.
Background
In Sidelink (SL) (e.g., vehicle-to-electrical, V2X) communication, a transmitting terminal may transmit data to a receiving terminal on a physical sidelink shared channel (pscch), and accordingly, after the receiving terminal receives the data on the pscch, hybrid automatic repeat request (HARQ) information of the data received on the psch may be fed back to the transmitting terminal on a Physical Sidelink Feedback Channel (PSFCH). However, in SL communication, the resources of the PSFCH are periodic, and therefore, it is a question worth studying how to determine the amount of feedback HARQ information if the receiving terminal receives multiple data on multiple PSSCHs within one resource period of the scheduled PSFCH.
Disclosure of Invention
The application provides a method and a communication device for sending and receiving feedback information, which are beneficial to improving the feedback efficiency of sending data and reducing the possibility that the feedback of the data exceeds the capability of a terminal.
A first aspect is a method for sending feedback information in an embodiment of the present application, which specifically includes: receiving N data on N PSSCHs, and sending M feedback information on M PSFCHs, wherein the M feedback information corresponds to M data in the N data, M is the minimum value of N, K and Q, or M is the smaller value of N and K, or M is the smaller value of N and Q, and K is the maximum value of the number of PSFCHs which bear the feedback information and are determined according to the terminal capability; q is the maximum value of the number of PSFCHs carrying feedback information when maximum transmit power is employed, and N is a positive integer.
In the embodiment of the present application, since M is the minimum value of N, K and Q, or M is the smaller value of N and K, or M is the smaller value of N and Q, K is the maximum value of the number of PSFCHs that carry feedback information and are determined according to the terminal capability, and Q is the maximum value of the number of PSFCHs that carry feedback information when maximum transmission power is used, it is helpful to improve the feedback efficiency of transmitted data and reduce the possibility that the feedback of data exceeds the terminal capability in the case of receiving multiple data on multiple PSSCHs.
In one possible design, Q satisfies the following expression:
Figure BDA0002446433920000011
alternatively, the first and second electrodes may be,
Figure BDA0002446433920000012
alternatively, the first and second electrodes may be,
Figure BDA0002446433920000013
alternatively, the first and second electrodes may be,
Figure BDA0002446433920000021
wherein, PmaxIs the maximum transmit power; ptIs the transmit power of the PSFCH carrying one feedback information.
Through the technical scheme, the method is beneficial to simplifying the mode of determining Q.
In one possible design, PtIs predefined; helping to simplify the implementation. Alternatively, the first and second electrodes may be,
Ptthe method includes that for the transmission power of a PSFCH carrying first feedback information, the first feedback information corresponds to first data in N data, and the first data has the highest service priority in the N data, or the first data has the largest data transmission distance in the N data, or the first data has the smallest index of a modulation and coding strategy MCS in the N data. Thereby helping to meet the transmission requirements of the first feedback information.
In one possible design, when M is less than N, the M PSFCHs are: and M PSFCHs carrying feedback information corresponding to the N data and having continuous indexes of frequency domain resources of the PSFCHs in the N PSFCHs. Thereby helping to increase the likelihood of success of the feedback.
In one possible design, the minimum index of the frequency domain resource of the PSFCH of the M PSFCHs is: the minimum index of the frequency domain resources of the PSFCH in the M PSFCHs with consecutive indexes of the L groups of frequency domain resources included in the N PSFCHs carrying the feedback information corresponding to the N data, and L is the total number of the M PSFCHs with consecutive indexes of the frequency domain resources of the PSFCH in the N PSFCHs carrying the feedback information corresponding to the N data. Thereby helping to further increase the likelihood of success of the feedback.
In a possible design, when W is smaller than M, W is a maximum number of consecutive indexes of frequency domain resources of a PSFCH of N PSFCHs carrying feedback information corresponding to the N data, and the M PSFCHs are: the first PSFCHs are W PSFCHs with consecutive indexes of frequency domain resources of the PSFCHs in the N PSFCHs carrying the feedback information corresponding to the N data, the M-W second PSFCHs are arranged at first M-W bits in the order from small to large according to the indexes of code domain resources of the PSFCHs in the N-W second PSFCHs, and the N-W second PSFCHs are PSFCHs other than the W first PSFCHs in the N PSFCHs carrying the feedback information corresponding to the N data.
In one possible design, the data transmission distances of the N data are the same.
In one possible design, when M is smaller than N and the data transmission distances of the N data are different, the data transmission distances of the M data corresponding to the M feedback information carried on the M PSFCHs are arranged at the first M bits in the N data according to the order from small to large of the data transmission distances. Thereby helping to increase the likelihood of success of the feedback.
In one possible design, the service priorities of the N data are the same.
In one possible design, when M is smaller than N and the traffic priorities of the N data are different, the traffic priorities of the M data corresponding to the M feedback information carried on the M PSFCHs are arranged in the first M bits in the N data according to an order from high to low of the traffic priorities of the data. Thereby being beneficial to meeting the feedback requirement of the data with higher service priority.
A second aspect is a method for receiving feedback information in an embodiment of the present application, which specifically includes: sending N data on N PSSCH, and receiving M feedback information on M PSFCH; the M pieces of feedback information correspond to M pieces of data in the N pieces of data, M is the smaller value of N and K, K is the maximum value of the number of PSFCHs which bear the feedback information and are determined according to the terminal capacity, and N is a positive integer.
In the embodiment of the application, since M is the smaller value of N and K, and K is the maximum value of the number of PSFCHs carrying feedback information determined according to the terminal capability, the feedback efficiency of received data is improved and the possibility that the feedback of data exceeds the terminal capability is reduced in the case that multiple data are transmitted on multiple PSSCHs.
In a possible design, when M is smaller than N, the M data corresponding to the M feedback information are arranged in the first M bits in the order of the service priority of the data from high to low. Thereby being beneficial to meeting the feedback requirement of the data with higher service priority.
A third aspect is a communication apparatus in an embodiment of the present application, including a receiving unit and a transmitting unit;
the receiving unit is configured to receive N data on N pschs, where N is a positive integer; the sending unit is configured to send M feedback information on M PSFCHs, where the M feedback information corresponds to M data of the N data, where M is a minimum value of N, K and Q, or M is a smaller value of N and K, or M is a smaller value of N and Q, and K is a maximum value of the number of PSFCHs that carry feedback information and are determined according to a terminal capability; and Q is the maximum value of the number of PSFCHs carrying feedback information when the maximum transmission power is adopted.
In one possible design, the Q satisfies the following expression:
Figure BDA0002446433920000031
alternatively, the first and second electrodes may be,
Figure BDA0002446433920000032
alternatively, the first and second electrodes may be,
Figure BDA0002446433920000033
alternatively, the first and second electrodes may be,
Figure BDA0002446433920000034
wherein, PmaxIs the maximum transmit power; ptIs the transmit power of the PSFCH carrying one feedback information.
In one possible design, the PtIs predefined; alternatively, the first and second electrodes may be,
the P istThe method includes that the PSFCH is used for carrying first feedback information, the first feedback information corresponds to first data in N data, the priority of the first data in the N data is highest, or the data transmission distance of the first data in the N data is maximum, or the index of a Modulation Coding Strategy (MCS) of the first data in the N data is minimum.
In one possible design, when M is less than N, the M PSFCHs are: and M PSFCHs carrying feedback information corresponding to the N data and having continuous indexes of frequency domain resources of the PSFCHs in the N PSFCHs.
In one possible design, the minimum index of the frequency domain resource of the PSFCH of the M PSFCHs is: the minimum index of the frequency domain resources of the PSFCH in the M PSFCHs with consecutive indexes of the L groups of frequency domain resources included in the N PSFCHs carrying the feedback information corresponding to the N data, and L is the total number of the M PSFCHs with consecutive indexes of the frequency domain resources of the PSFCH in the N PSFCHs carrying the feedback information corresponding to the N data.
In a possible design, when W is smaller than M, W is a maximum number of consecutive indexes of frequency domain resources of a PSFCH of N PSFCHs carrying feedback information corresponding to the N data, and the M PSFCHs are: the first PSFCHs are W PSFCHs with consecutive indexes of frequency domain resources of the PSFCHs in the N PSFCHs carrying the feedback information corresponding to the N data, the M-W second PSFCHs are arranged at first M-W bits in the order from small to large according to the indexes of code domain resources of the PSFCHs in the N-W second PSFCHs, and the N-W second PSFCHs are PSFCHs other than the W first PSFCHs in the N PSFCHs carrying the feedback information corresponding to the N data.
In one possible design, the data transmission distances of the N data are the same.
In one possible design, when M is smaller than N and the data transmission distances of the N data are different, the data transmission distances of the M data corresponding to the M feedback information carried on the M PSFCHs are arranged at the first M bits in the N data according to the order from small to large of the data transmission distances.
In one possible design, the service priorities of the N data are the same.
In one possible design, when M is smaller than N and the traffic priorities of the N data are different, the M data corresponding to the M feedback information carried on the M PSFCHs are arranged at the first M bits in the N data in order from the highest traffic priority of the data to the lowest traffic priority of the data.
A fourth aspect is another communication apparatus according to an embodiment of the present application, including a receiving unit and a transmitting unit;
the sending unit is configured to send N data on N physical sidelink shared channels PSSCH, where N is a positive integer; the receiving unit is configured to receive M pieces of feedback information on M physical sidelink control channels PSFCH; the M pieces of feedback information correspond to M pieces of data in the N pieces of data, wherein M is the smaller value of N and K, and K is the maximum value of the number of PSFCHs which bear the feedback information and are determined according to the terminal capability.
In a possible design, when M is smaller than N, M data corresponding to the M feedback information are arranged in the first M bits in the N data according to a sequence from high to low service priority of the data.
In a fifth aspect, another communication apparatus according to the embodiment of the present application includes a processor and a memory, where the memory stores a computer program; the processor is configured to invoke the computer program in the memory to cause the communication device to perform the method of any one of the possible designs of the first aspect and the first aspect, and/or the method of any one of the possible designs of the second aspect and the second aspect.
In a sixth aspect, embodiments of the present application further provide a computer-readable storage medium, which includes a computer program, when the computer program runs on a computer, the computer is caused to execute the method for any one of the above-mentioned first aspect and possible designs of the first aspect, and/or the method for any one of the second aspect and possible designs of the second aspect.
In a seventh aspect, an embodiment of the present application further provides a chip system, where the chip system includes a processor and may further include a memory, and is configured to implement the method according to any one of the possible designs of the first aspect and the first aspect, and/or the method according to any one of the possible designs of the second aspect and the second aspect. The chip system may be formed by a chip, and may also include a chip and other discrete devices.
In an eighth aspect, embodiments of the present application also provide a computer program product, comprising a computer program that, when run on a computer, causes the computer to perform the method of the various aspects and any of the various possible designs of the aspects.
In a ninth aspect, the present application further provides a communication system, which includes the communication apparatus of any one of the possible designs of the third aspect and the third aspect, and/or the communication apparatus of any one of the possible designs of the fourth aspect and the fourth aspect.
In addition, the technical effects brought by any one of the possible design manners in the third aspect to the ninth aspect can be referred to the technical effects brought by different design manners in the method portion, and are not described herein again.
Drawings
Fig. 1 is a schematic diagram of an application scenario according to an embodiment of the present application;
fig. 2 is a schematic flowchart of a process of sending feedback information according to an embodiment of the present application;
FIG. 3 is a diagram illustrating a PSFCH selection according to an embodiment of the present application;
FIG. 4 is a schematic diagram of another alternative PSFCH in accordance with an embodiment of the present application;
fig. 5 is a schematic flowchart of a process of receiving feedback information according to an embodiment of the present application;
fig. 6A is a schematic structural diagram of a communication device according to an embodiment of the present application;
fig. 6B is a schematic structural diagram of another communication device according to an embodiment of the present application.
Detailed Description
In the embodiments of the present application, "at least one" means one or more, "a plurality" means two or more. "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 alone, both A and B, and B alone, where A, B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a and b, a and c, b and c, or a, b and c, wherein each of a, b, c may itself be an element or a set comprising one or more elements.
In the present application embodiments, "exemplary," "in some embodiments," "in another embodiment," and the like are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, the term using examples is intended to present concepts in a concrete fashion.
In the embodiments of the present application, "of", "corresponding" and "corresponding" may sometimes be mixed. It should be noted that the intended meaning is consistent when no distinction is made therebetween. In the embodiments of the present application, communication and transmission may be mixed sometimes, and it should be noted that the expressed meanings are consistent in a non-emphasized manner. For example, a transmission may include a transmission and/or a reception, may be a noun, and may be a verb.
It should be noted that the terms "first," "second," and the like in the embodiments of the present application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or order. The terms equal to or greater than or equal to in the embodiments of the present application may be used with greater than or equal to, and are applicable to the technical solutions adopted when greater than or equal to, and may also be used with less than or equal to, and are applicable to the technical solutions adopted when less than or equal to, it should be noted that when equal to or greater than or equal to, it is not used with less than; when the ratio is equal to or less than the combined ratio, the ratio is not greater than the combined ratio.
In view of the problems in the background art, embodiments of the present application provide a method for sending and receiving feedback information, which can determine the number of PSFCHs actually carrying feedback information according to the number of PSSCHs carried by actually received data and K and/or Q, where K is a maximum value of the number of PSFCHs carrying feedback information determined according to a terminal capability, and Q is a maximum value of the number of PSFCHs carrying feedback information when a maximum transmission power is adopted, thereby facilitating improvement of feedback efficiency of sent data and reduction of possibility that feedback of data exceeds a terminal capability in a case where multiple data are received on multiple PSSCHs.
Some terms in the embodiments of the present application are explained below to facilitate understanding by those skilled in the art.
1. Terminal (terminal). The terminal according to the embodiment of the present application is a device having a wireless transceiving function, and may be referred to as a terminal device, a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), or the like. It is noted that the terminal can support at least one wireless communication technology, such as LTE, NR, and the like. For example, the terminal may be a vehicle-mounted terminal, a wireless terminal in self driving (self driving), a vehicle-mounted communication module or other embedded communication modules, or may also be a handheld communication device of a user, such as a mobile phone, a tablet computer, or the like. As another example, the terminal may be a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in a smart home (smart home), a wearable device, a terminal device in a future mobile communication network, a terminal device in a future evolved public mobile land network (PLMN), or the like. In some embodiments of the present application, the terminal may also be a device having a transceiving function, such as a system-on-chip. The chip system may include a chip and may also include other discrete devices.
2. A network device. The network device in the embodiment of the present application is a device that provides a wireless communication function for a terminal, and may also be referred to as an access network device, a Radio Access Network (RAN) device, or the like. Therein, the network device may support at least one wireless communication technology, such as LTE, NR, etc. Exemplary network devices include, but are not limited to: a next generation base station (gbb) in a fifth generation mobile communication system (5th-generation, 5G), a conventional Universal Mobile Telecommunications System (UMTS) or an evolved node B (eNB) in LTE, a Radio Network Controller (RNC), a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a home base station (e.g., home node B or home node B, HNB), a Base Band Unit (BBU) in a distributed base station scenario, a Transmission and Reception Point (TRP), a Transmission Point (TP), a mobile switching center (msc), and the like. The network device may also be a baseband pool BBU pool and a Radio Remote Unit (RRU) in a Cloud Radio Access Network (CRAN) scenario, or the network device may be a relay station, an access point, a vehicle-mounted device, a terminal device, a wearable device, a network device in future mobile communication, or a network device in future evolved PLMN, or the like.
3. And feeding back the information. The feedback information in the embodiment of the present application is used to indicate the receiving situation of the data. Illustratively, the feedback information includes an Acknowledgement (ACK) and a Negative Acknowledgement (NACK). Wherein, ACK is used to indicate successful data reception, and NACK is used to indicate failed data reception.
4. A time unit. A time unit in the embodiments of the present application may refer to a period of time in the time domain. In SL communication, scheduling is performed in units of time units or granularity in the time domain. For example, the time unit may be a slot (slot), a micro-slot (micro-slot), a mini-slot (mini-slot), a symbol, a radio frame (radio frame), or a subframe (subframe). Taking time unit as an example of a time slot, in SL communication, scheduling is performed in time domain by using time slot as a unit or granularity.
5. Data transmission distance. (1) And the data transmission distance refers to the communication distance between the receiving end and the transmitting end of the data. Taking the example that the terminal 01 receives the data 1 from the terminal 02, the terminal 01 is a receiving end, the terminal 02 is a sending end, and the data transmission distance of the data 1 is the distance between the geographical position of the terminal 01 and the geographical position of the terminal 02. In this case, the terminal 01 may determine the geographical location of the terminal 02 according to Global Positioning System (GPS) information or Zone information of the terminal 02, and further determine a distance between the geographical location of the terminal 01 and the geographical location of the terminal 02. The terminal 02 may send its GPS information or Zone information to the terminal 01, where the GPS information or Zone information may be carried in Sidelink Control Information (SCI). (2) And the data transmission distance is the minimum communication distance of the data. The minimum communication distances of the data of different service types may be different or the same, and specifically, the minimum communication distances of the data of different service types may be predefined or configured by the network device, which is not limited herein. Taking the minimum communication distance of the data of the first service type as 50 meters as an example, when the data of the first service type is transmitted between the sending end and the receiving end, the sending end needs to ensure the reliability of communication at a distance of at least 50 meters at the receiving end.
The embodiment of the application is applied to an SL communication scenario, for example, a V2X communication scenario, in a New Radio (NR), Long Term Evolution (LTE) and other communication systems. For example, as shown in fig. 1, a schematic diagram of a communication scenario according to an embodiment of the present application is shown. Specifically, in the communication scenario shown in fig. 1, the terminal 01, the terminal 02, the terminal 03, and the terminal 04 may perform SL communication between two terminals, where the terminal 01 and the terminal 02 are located within the coverage of the network device, and the terminal 03 and the terminal 04 are located outside the coverage of the network device. For example, taking the case where terminal 01 performs SL communication with terminal 02 as an example, terminal 01 transmits data to terminal 02 on the psch, and accordingly terminal 02 receives data from terminal 01 on the psch, in which case terminal 01 is referred to as a transmission terminal and terminal 02 is referred to as a reception terminal.
Taking a scenario that a receiving terminal receives data on N pschs as an example, a method for sending feedback information according to an embodiment of the present application is described in detail.
For example, as shown in fig. 2, a flowchart of a method for sending feedback information according to an embodiment of the present application is shown, which specifically includes the following steps.
201. The receiving terminal receives N data on N pschs, N being a positive integer.
Wherein each of the N data is carried on one of the N pschs. Taking the value of N as 2 as an example, the N pschs are psch 1 and psch 2, respectively, and the N data are data 1 and data 2, respectively, if data 1 is carried on psch 1 and data 2 is carried on psch 2, the receiving terminal receives the N data on the N pschs, which can be understood as that the receiving terminal receives data 1 on psch 1 and receives data 2 on psch 2.
It should be noted that the N data may be sent by one or more sending terminals to a receiving terminal. For example, the N data may be transmitted to the receiving terminal by the same transmitting terminal in different time units. For another example, the N data may also be transmitted to the receiving terminal by different transmitting terminals in the same time unit. For example, N1 data among the N data are transmitted from the transmitting terminal 1 to the receiving terminal in different time units, N-N1 data are transmitted from the transmitting terminal 2 to the receiving terminal in different time units, and the time units for the transmitting terminal 1 and the transmitting terminal 2 to transmit data to the receiving terminal may be the same or different, and are not limited thereto.
202. The receiving terminal sends M pieces of feedback information on M PSFCHs, wherein the M pieces of feedback information correspond to M pieces of data in the N pieces of data. M is less than or equal to N.
The M pieces of feedback information correspond to M pieces of data among the N pieces of data, and it can be understood that: the M pieces of feedback information are feedback information of M pieces of data among the N pieces of data. N may be understood as the number of feedback information actually to be transmitted by the receiving terminal, i.e. the number of PSFCHs actually to be transmitted by the receiving terminal.
Specifically, the receiving terminal sends M feedback information on M PSFCHs, which can be understood as: the receiving terminal sends M feedback information on M PSFCHs of the same time unit, that is, the feedback information of M data of the N data is sent by the receiving terminal on one time unit.
In the embodiment of the present application, M may be determined based on the following manner:
the first method is as follows: m is the minimum of N, K and Q. The number of the PSFCHs carrying the feedback information is determined according to the terminal capability, and the number of the PSFCHs can be determined according to the terminal capability. Q is the maximum value of the PSFCH carrying the feedback information when the maximum transmission power is adopted, in other words, Q is the number of the PSFCHs transmitted in one time unit determined according to the maximum transmission power. The maximum transmission power adopted by the receiving end when determining Q may be a maximum transmission power (e.g., Pcmax) configured by the network device for the receiving terminal or a maximum transmission power supported by the receiving terminal. For example, in the case where the maximum transmission power employed by the receiving end at the time of Q is determined to be the maximum transmission power supported by the receiving terminal, if the maximum transmission power supported by the receiving terminal is P1, Q is the number of PSFCHs determined to be transmitted in one time unit at the time of employing the transmission power P1. For another example, when determining that the maximum transmission power used by the receiving end is the maximum transmission power configured by the network device for the receiving terminal when Q is determined, if the maximum transmission power configured by the network device for the receiving terminal is Pcmax, Q is the number of PSFCHs that are determined to be transmitted in one time unit when the transmission power Pcmax is used.
In the coverage of the network device, the receiving terminal may report, to the network device, the number K of PSFCHs that can be transmitted in one time unit and that is determined according to the terminal capability, or may transmit, to other terminals, the number K of PSFCHs that can be transmitted in one time unit and that is determined according to the terminal capability through Radio Resource Control (RRC) signaling of the sidelink.
In some embodiments, the receiving terminal may compare the magnitudes of N and Q first, and then compare the smaller of N and Q with the magnitude of K, where M is equal to the smaller of N and Q if K is greater than the smaller of N and Q, and M is equal to K if K is less than the smaller of N and Q.
Illustratively, Q satisfies expression (1), or expression (2), or expression (3), or expression (4):
Figure BDA0002446433920000081
Figure BDA0002446433920000082
Figure BDA0002446433920000083
Figure BDA0002446433920000084
wherein, PmaxDetermining the maximum transmission power adopted when Q is obtained; ptFor the transmit power of the PSFCH carrying one feedback information, i.e. the transmit power of one PSFCH, the value of c is 3.
In particular, PtMay be network device configured, predefined by a protocol, or may be determined by the receiving terminal based on some policy or algorithm. Of course, it will be understood that PtOr may be derived in conjunction with network configuration or pre-definition, and some algorithm or policy.
For example, the network device may configure one or more threshold values of transmission power on one resource pool, where the threshold value may be understood as the minimum transmission power that satisfies the QoS requirement of the traffic carried on the PSSCH corresponding to the PSFCH, and the receiving terminal receives the M feedback information from the receiving terminalOne threshold value is selected as P from one or more threshold values configured on a resource pool where the resources of the PSFCH are locatedt. For example, when there are a plurality of thresholds configured on the resource pool where the resource of the PSFCH for carrying M pieces of feedback information is located, the receiving terminal may select one threshold as P from among the plurality of thresholds configured on the resource pool where the resource of the PSFCH for carrying M pieces of feedback information is located, in combination with the network signal strength or quality (such as Channel Quality Indicator (CQI)) of the receiving terminalt. For example, when the network signal strength or quality of the receiving terminal is good, the receiving terminal may select a smaller or smallest threshold from a plurality of thresholds configured on a resource pool where resources of the PSFCH for carrying M feedback information are located, as Pt. For another example, when the network signal strength or quality of the receiving terminal is poor, the receiving terminal may select a larger or largest threshold from a plurality of thresholds configured on a resource pool where resources of the PSFCH for carrying M feedback information are located, as Pt。
As another example, the network device configures different thresholds for the service priorities of different data, where the higher the service priority is, the larger the threshold is, so as to help ensure the transmission of the feedback information of the data with the higher service priority. In this case, the receiving terminal may determine the service types of the N data, determine the service priorities of the N data according to the service types of the N data, and then determine PtA threshold configured for a highest traffic priority for data of the N data. In this case, PtIt can be understood that the transmission power of the PSFCH carrying the feedback information of the data with the highest service priority in the N data is the minimum transmission power required to guarantee the PSFCH carrying the feedback information of the data with the highest service priority in the N data.
As another example, the receiving terminal determines P according to the maximum data transmission distance of the N datat. For example, the receiving terminal determines P based on the functional relationship between power and data transmission distance according to the maximum data transmission distance of N datat. In particular between power and data transmission distanceThe functional relationship may be P ═ f (d), where P is power, d is data transmission distance, and when d is the maximum data transmission distance of N data, P istF (d). The functional relationship between the power and the data transmission distance may be predefined, or may be configured by a network device, and the like, which is not limited herein. In this case, PtThe transmission power of the PSFCH carrying the feedback information of the data with the largest data transmission distance among the N data. Thereby helping to ensure that the sending terminal farthest from the receiving terminal can receive the feedback information. Alternatively, a P is predefined or configured by the network devicetOf the initial value of (A), the PtThe initial value of (2) is a transmission power required for transmitting a PSFCH when the data transmission distance is guaranteed to be a first value, and the receiving terminal can transmit the P data according to the maximum data transmission distance of the N datatIs adjusted to obtain Pt. For example, when the maximum data transmission distance of the N data is greater than a first value, P is increasedtIs started. For another example, when the maximum data transmission distance of the N data is smaller than the first value, P is decreasedtIs started.
As another example, the network device may configure one or more thresholds for different Modulation and Coding Schemes (MCS) tables (MCS tables). For example, in the case that one threshold is configured for different MCS tables, the receiving terminal may determine P according to the minimum value of MCS index of data in N datat. I.e. PtAnd configuring a threshold value for the MCS table of the minimum MCS index of the data in the N data by the network equipment. In this case, PtIt can be understood as the transmission power of the PSFCH carrying the feedback information of the data with the smallest MCS index among the N data.
For example, as shown in table 1, the threshold values configured by the network device for three MCS tables of 64QAM, Low impact 64QAM, and 256QAM are respectively threshold 1, threshold 2, and threshold 3, and when the MCS table corresponding to the minimum MCS index of data in the N data is 256QAM, P is a value corresponding to PtEqual to the threshold value 3.
TABLE 1
MCS table Threshold value
64QAM Threshold value 1
Low efficiency 64QAM Threshold value 2
256QAM Threshold value 3
For example, in the case that multiple thresholds are configured for different MCS tables, the network device may configure different thresholds for different MCS indexes in the MCStable, and the receiving terminal may determine P according to the minimum MCS index of data in the N datat. I.e. PtAnd configuring a threshold value for the network equipment aiming at the minimum MCS index of the data in the N data. In this case, PtIt can be understood as the transmission power of the PSFCH carrying the feedback information of the data with the smallest MCS index among the N data.
For example, taking the MCS table including MCS index 1, MCS index 2, and MCS index 3 as an example, as shown in table 2, the thresholds configured for 3 MCS indexes in the MCS table are threshold 1, threshold 2, and threshold 3 in this order. P when the minimum MCS index of data among the N data is MCS index 1tEqual to the threshold value 1.
TABLE 2
MCS index Threshold value
MCS index 1 Threshold value 1
MCS index 2 Threshold value 2
MCS index 3 Threshold value 3
Alternatively, the receiving terminal may set the average value of the thresholds respectively configured for the MCS indices of the N data as Pt. For example, if N is 3, and the MCS indices of N data are respectively MCS index 1, MCS index 2, and MCS index 3 in table 2, P istMay be an average of threshold 1, threshold 2 and threshold 3.
In other embodiments of the present application, the receiving terminal may further determine P according to the modulation order and/or the code rate of the N datat. Wherein, the higher the modulation order, the larger the code rate, PtThe smaller the value of the feedback information is, the requirement that the feedback information of the service data with high throughput rate can reach the sending terminal is facilitated to be ensured; the higher the modulation order, the larger the code rate, PtThe larger the value of (a) is, the more reliable the low-bit-rate transmission is ensured.
It is to be noted that the above is only PtIs not limited to the embodiments of the present application, and P may be determined in other mannerst。
In addition, c referred to in the above expression (1) is used to indicate a decrease value of the transmission power of one PSFCH per increase of one PSFCH in the case where the PSFCH equally divides the terminal transmission power, and the above value of c being 3 means a decrease of the transmission power of one PSFCH by 3dB per increase of one PSFCH in the case where the PSFCH equally divides the terminal transmission power. For example, in the case where the terminal transmission power is 23dB, if one PSFCH is transmitted, the transmission power of the PSFCH is 23dB, and if two PSFCHs are transmitted, in the case where the PSFCH equally divides the terminal transmission power, the transmission power of each PSFCH is 20 dB. It should be noted that the above description is only given by taking the value of c as 3 as an example, and the value of c is not limited in the embodiment of the present application.
The second method comprises the following steps: m is the smaller of N and K. N and K can be referred to the related description in the first mode, and are not described in detail herein.
The third method comprises the following steps: m is the smaller of N and Q. N and Q can be referred to in the description of the first embodiment, and are not described herein.
When M is equal to N, M of the N data indicates N data in step 202, and the receiving terminal sends feedback information of the N data on the N PSFCHs. However, when M is smaller than N, that is, the receiving terminal cannot perform feedback on all the received N data, and can only perform feedback on M data of the received N data, further, the receiving terminal may transmit M feedback information on M PSFCHs based on the following manner:
mode 1: under the condition that the service priorities of the N data received by the receiving terminal are the same, the receiving terminal selects M PSFCHs from the N PSFCHs carrying feedback information corresponding to the N data according to the indexes of the frequency domain resources of the PSFCHs, wherein the indexes of the frequency domain resources of the M PSFCHs are continuous. The frequency domain resource of the PSFCH may be a Resource Block (RB). Further, according to the sequence of the indexes of the frequency domain resources of the PSFCH from small to large, M PSFCHs with continuous indexes of the frequency domain resources are selected from the N PSFCHs carrying the feedback information corresponding to the N data. That is, when M PSFCHs with consecutive indexes of L groups of frequency domain resources are included in the N PSFCHs carrying feedback information corresponding to the N data, the minimum index of the frequency domain resource in the M PSFCHs selected by the receiving terminal is: the N PSFCHs carrying the feedback information corresponding to the N data include minimum indexes of frequency domain resources in M PSFCHs with consecutive indexes of L groups of frequency domain resources, and L is the total number of the M PSFCHs carrying the frequency domain resources of the PSFCH in the N PSFCHs carrying the feedback information corresponding to the N data with consecutive indexes.
For example, taking the value of N as 9 and the value of M as 4 as an example, the N PSFCHs carrying the feedback information corresponding to the N data are PSFCH0 through PSFCH9, respectively, if the indexes of the frequency domain resources of PSFCH0 through PSFCH3 are consecutive, the indexes of the frequency domain resources of PSFCH6 through PSFCH9 are consecutive, and if the index of the frequency domain resource of PSFCH0 is the smallest among PSFCH0 through PSFCH3 and PSFCH6 through PSFCH9, the M PSFCHs selected by the receiving terminal are PSFCH0 through PSFCH 3.
Further, in some embodiments, when the maximum number of consecutive indexes of frequency domain resources in the N PSFCHs carrying feedback information corresponding to the N data is W, and W is less than M, the M PSFCHs selected from the N PSFCHs carrying feedback information corresponding to the N data include W first PSFCHs and M-W second PSFCHs.
Illustratively, the receiving terminal selects W first PSFCHs from N PSFCHs carrying feedback information corresponding to N data, where the indexes of frequency domain resources in the N PSFCHs carrying the feedback information corresponding to N data are consecutive, and then selects M-W second PSFCHs from the N-W second PSFCHs according to the indexes of code domain resources of the PSFCHs, where the N-W second PSFCHs are PSFCHs except the W first PSFCHs from the N PSFCHs carrying the feedback information corresponding to N data. For example, the index of the code domain resource of the PSFCH may be a Cyclic Shift Pair (CSP) index.
For example, the receiving terminal may select M-W second PSFCHs from the N-W second PSFCHs in order of the index of the code domain resource of the PSFCH from small to large. According to the index of the code domain resources of the PSFCH, the indexes of the code domain resources of the M-W second PSFCHs are arranged at the first M-W bits in the N-W second PSFCHs in the descending order.
Or, the service priority of the data may not be considered in the first mode.
One example. Taking the example of N being 8 and M being 5, the receiving terminal receives data 0 from terminal 0 on PSSCH0, data 1 from terminal 1 on PSSCH1, data 2 from terminal 1 on PSSCH2, data 3 from terminal 3 on PSSCH3, data 4 from terminal 4 on PSSCH5, data 5 from terminal 5 on PSSCH10, data 6 from terminal 6 on PSSCH14, and data 7 from terminal 7 on PSSCH 15. As shown in fig. 3, the PSFCH for carrying the feedback information of data 0 is a PSFCH, the PSFCH for carrying the feedback information of data 1 is a PSFCH, the PSFCH for carrying the feedback information of data 2 is a PSFCH, the PSFCH for carrying the feedback information of data 3 is a PSFCH, the PSFCH for carrying the feedback information of data 4 is a PSFCH, the PSFCH for carrying the feedback information of data 5 is a PSFCH, the PSFCH for carrying the feedback information of data 6 is a PSFCH, the PSFCH for carrying the feedback information of data 7 is a PSFCH, and as can be seen from fig. 3, the PSFCH, and the PSFCH have consecutive indexes of frequency domain resources, and are selected from the PSFCH, and the PSFCH.
And in the second mode, under the condition that the service priorities of the N data received by the receiving terminal are different, the receiving terminal selects M PSFCHs from the N PSFCHs carrying the feedback information of the N data according to the service priorities of the data. For example, the receiving terminal selects M PSFCHs carrying feedback information of data with the service priority of the data ranked M bits first from the N PSFCHs carrying feedback information of the N data in the order from the highest service priority of the data to the lowest service priority of the data.
Taking the value of N as 5 and the value of M as 3 as an example, N data received by the receiving terminal are data 1, data 2, data 3, data 4, and data 5, respectively, where the service priorities of data 1 to data 5 are data 5, data 2, data 3, data 4, and data 1 in sequence from high to low, and in this case, M PSFCHs selected by the receiving terminal are a PSFCH carrying feedback information of data 5, a PSFCH carrying feedback information of data 2, and a PSFCH carrying feedback information of data 3.
And thirdly, the receiving terminal selects M PSFCHs from the PSFCHs carrying the feedback information of the N data according to the data transmission distance. For example, according to the sequence of the data transmission distance from small to large, M pieces of data corresponding to M pieces of feedback information carried on M PSFCHs selected by the receiving terminal are arranged at the first M bits. For example, the data transmission distance may be determined by the receiving terminal according to its GPS information and the GPS information of the transmitting terminal, or the receiving terminal may be determined according to the Zone information of the transmitting terminal according to its Zone information, for example, the transmitting terminal may transmit the GPS information or the Zone information Sidelink Control Information (SCI) (e.g., SCI 0-1) to the receiving terminal. For another example, the data transmission distance may be determined by the sending terminal, and then the sending terminal sends the data transmission distance to the receiving terminal by carrying it in the SCI.
One example. Taking the example of N being 8 and M being 5, the receiving terminal receives data 0 from terminal 0 on PSSCH0, data 1 from terminal 1 on PSSCH1, data 2 from terminal 1 on PSSCH2, data 3 from terminal 3 on PSSCH3, data 4 from terminal 4 on PSSCH5, data 5 from terminal 5 on PSSCH10, data 6 from terminal 6 on PSSCH14, and data 7 from terminal 7 on PSSCH 15. As shown in fig. 4, the PSFCH for carrying feedback information of data 0 is PSFCH0, the PSFCH for carrying feedback information of data 1 is PSFCH1, the PSFCH for carrying feedback information of data 2 is PSFCH2, the PSFCH for carrying feedback information of data 3 is PSFCH3, the PSFCH for carrying feedback information of data 4 is PSFCH5, the PSFCH for carrying feedback information of data 5 is PSFCH10, the PSFCH for carrying feedback information of data 6 is PSFCH14, and the PSFCH for carrying feedback information of data 7 is PSFCH15, and as can be seen from fig. 4, the data transmission distances of data 0 to data 7 are 70m, 60m, 100m, 10m, 120m, 200m, 50m, and 230m in this order. Therefore, in the order of the data transmission distance from small to large, data 0 to data 7 are data 3, data 6, data 1, data 0, and data 2, respectively, which are arranged at the top 5, and in this case, M PSFCHs are selected from the PSFCHs carrying feedback information of N data as: PSFCH3, PSFCH6, PSFCH1, PSFCH0, and PSFCH 2.
It should be noted that, the receiving terminal may first select M PSFCHs from the PSFCHs carrying the feedback information of the N data according to the order of the service priority of the data from high to low. In the case that there is data with the same service priority in the N data, the receiving terminal may first select N1 PSFCHs from the N PSFCHs carrying the feedback information of the N data according to the order from the highest to the lowest of the service priority of the data, and select M PSFCHs from the N1 PSFCHs according to the order from the lowest to the highest of the data transmission distances. For example, taking the value of N as 5 and the value of M as 3 as an example, N data are data 0 to data 4, respectively, where the service priority of data 0 and data 1 is P2, the service priority of data 3 is P1, the service priority of data 3 and data 4 is P3, the service priority of P1 among the service priorities P1, P2, and P3 is the highest, P2 is the lowest, and P3 is the lowest, and data 0 to data 4 are data 0, data 1, data 2, data 3, and data 4 in order of decreasing data transmission distance.
Therefore, in the N data, 4 PSFCHs are selected from the N PSFCHs carrying the feedback information of the N data in the order from high to low of the service priority of the data, and the selected PSFCHs are the PSFCH carrying the feedback information of data 0, the PSFCH carrying the feedback information of data 1, the PSFCH carrying the feedback information of data 3, and the PSFCH carrying the feedback information of data 4. In the order from high to low according to the data transmission distance, 3 PSFCHs are selected from 4 PSFCHs carrying feedback information of data 0, data 1, data 3, and data 4, specifically, the PSFCH carrying feedback information of data 0, the PSFCH carrying feedback information of data 1, and the PSFCH carrying feedback information of data 3.
It should be further noted that, the above is merely an illustration of selecting M PSFCHs from N PSFCHs, and does not form a limitation to the embodiment of the present application, in this embodiment of the present application, a receiving terminal may further select M PSFCHs according to an order from high to low of a service priority of data, then according to an order from small to large of indexes of frequency domain resources, then according to an order from small to large of indexes of code domain resources, and finally according to an order from small to large of a data transmission distance.
In addition, the embodiment of the application also provides a method for receiving the feedback information aiming at the sending terminal. A method for receiving feedback information in the embodiments of the present application is described in detail by taking an example in which a transmitting terminal transmits N data on N pschs.
For example, as shown in fig. 5, a flowchart of a method for sending feedback information according to an embodiment of the present application is shown, which specifically includes the following steps.
501. The transmitting terminal transmits N data on N pschs, N being a positive integer.
Wherein each of the N data is carried on one of the N pschs. Taking the value of N as 2 as an example, N PSSCHs are PSSCH1 and PSSCH2, respectively, and N data are data 1 and data 2, respectively, if data 1 is carried on PSSCH1 and data 2 is carried on PSSCH2, a receiving terminal receives N data on N PSSCHs, it can be understood that a transmitting terminal transmits data 1 on PSSCH1 and transmits data 2 on PSSCH 2.
It should be noted that, the N data may be sent by the sending terminal in one or more time units, which is not limited in this respect.
502. A sending terminal receives M pieces of feedback information on M PSFCHs; wherein the M pieces of feedback information correspond to M pieces of data among the N pieces of data.
Specifically, the understanding that the M feedback information corresponds to the M data in the N data may refer to the related description in step 202, and is not described herein again.
In the embodiment of the present application, M may be determined based on the following manner:
m is the smaller value of N and K, and K is the maximum value of the number of PSFCHs carrying feedback information and is determined according to the terminal capability. For the terminal capability, reference may be made to the related description in the method for sending feedback information shown in fig. 2, and details are not described herein again.
In case M is equal to N, the transmitting terminal is able to receive feedback information for receiving N data on N PSFCHs. However, in the case that M is smaller than N, the transmitting terminal may select M PSFCHs to receive feedback information of M data out of the N data as follows:
for example, the sending terminal may select M PSFCHs from the PSFCHs carrying the feedback information of N data according to the order of the service priority of the data from high to low, where the service priority of the data in the N data of the M data corresponding to the feedback information carried on the M PSFCHs is arranged at the first M bits.
Further, in some embodiments, under the condition that the service priorities of the N data are the same, the sending terminal may further select M PSFCHs from the PSFCHs carrying the feedback information of the N data according to a sequence from small to large of the indexes of the frequency domain resources of the PSFCHs, a sequence from small to large of the indexes of the code domain resources of the PSFCHs, and/or a sequence from small to large of the data transmission distances, where a specific selection manner may refer to related descriptions in the method for sending feedback information shown in fig. 2, and details are not described here again.
The above embodiments can be used alone or in combination with each other to achieve different technical effects.
In the embodiments provided in the present application, the communication method provided in the embodiments of the present application is described from the perspective of the terminal device as an execution subject. In order to implement each function in the communication method provided in the embodiment of the present application, the terminal device may include a hardware structure and/or a software module, and implement each function in the form of a hardware structure, a software module, or a hardware structure and a software module. Whether any of the above-described functions is implemented as a hardware structure, a software module, or a hardware structure plus a software module depends upon the particular application and design constraints imposed on the technical solution.
Similar to the above concept, the embodiment of the present application further provides a communication apparatus 600, where the communication apparatus 600 is configured to implement the functions of the receiving terminal or the sending terminal in the above method. The communication device 600 may be a terminal, or may be a device in a terminal. The apparatus may be a system-on-a-chip. In the embodiment of the present application, the chip system may be composed of a chip, and may also include a chip and other discrete devices.
In one example, as shown in fig. 6A, the communication apparatus 600 includes a receiving unit 601 and a transmitting unit 602.
In the case where the communication apparatus 600 is used to implement the receiving terminal in the above method, the receiving unit 601 is used to receive N data on N pschs, where N is a positive integer. A sending unit 602 is configured to send M feedback information on M PSFCHs, where the M feedback information corresponds to M data of the N data, and M is a minimum value of N, K and Q, or M is a smaller value of N and K, or M is a smaller value of N and Q, and K is a maximum value of the number of PSFCHs that carry feedback information and are determined according to terminal capabilities; q is the maximum value of the number of PSFCHs carrying feedback information when maximum transmit power is employed.
In the case where the communication apparatus 600 is used to implement the terminal transmission method described above, the transmitting unit 602 is configured to transmit N data on N pschs, where N is a positive integer; the receiving unit 601 is configured to receive M feedback information on M PSFCHs; the M pieces of feedback information correspond to M pieces of data in the N pieces of data, wherein M is the smaller value of N and K, and K is the maximum value of the number of PSFCHs which bear the feedback information and are determined according to the terminal capability.
For specific implementation procedures of the receiving unit 601 and the sending unit 602, reference may be made to the description in the above method embodiment. The division of the modules in the embodiments of the present application is schematic, and only one logical function division is provided, and in actual implementation, there may be another division manner, and in addition, each functional module in each embodiment of the present application may be integrated in one processor, may also exist alone physically, or may also be integrated in one module by two or more modules. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.
In yet another example, as shown in fig. 6B, the communications apparatus 600 includes at least one processor 610 and a memory 620. Wherein the memory 620 has stored therein a computer program. The memory 620 is coupled to the processor 610. The coupling in the embodiments of the present application is a spaced coupling or communication connection between devices, units or modules, and may be in an electrical, mechanical or other form, and is used for information interaction between the devices, units or modules. As another implementation, the memory 620 may also be located outside of the communication device 600. The processor 610 may operate in conjunction with the memory 620. The processor 610 may invoke a computer program stored in the memory 620. At least one of the at least one memory may be included in the processor.
In some embodiments, communications apparatus 600 may also include a communications interface 630 for communicating with other devices over a transmission medium, such that the apparatus used in communications apparatus 600 may communicate with other devices. Illustratively, the communication interface 630 may be a transceiver, circuit, bus, module, or other type of communication interface, which may be other terminals. The processor 610 transmits and receives data using the communication interface 630 and is configured to implement the methods in the embodiments described above. Illustratively, the communication interface 630 is used for receiving data and sending feedback information. Also illustratively, the communication interface 630 is configured to transmit data and receive feedback information.
In the embodiments of the present application, the processor may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and may implement or execute the methods, steps, and logic blocks disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in a processor.
In the embodiment of the present application, the memory may be a nonvolatile memory, such as a Hard Disk Drive (HDD) or a solid-state drive (SSD), and may also be a volatile memory, for example, a random-access memory (RAM). The memory is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to such. The memory in the embodiments of the present application may also be a circuit or any other device capable of implementing a storage function for storing a computer program and/or data.
The method provided by the embodiment of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The procedures or functions according to the embodiments of the present invention are wholly or partially generated when the computer program is loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a computer network, a network appliance, a user device, or other programmable apparatus. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)), or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a Digital Video Disk (DVD)), or a semiconductor medium (e.g., an SSD), among others.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims (27)

1. A method for transmitting feedback information, the method comprising:
receiving N data on N physical side uplink shared channels PSSCH, wherein N is a positive integer;
sending M pieces of feedback information on M physical sidelink control channels (PSFCHs), wherein the M pieces of feedback information correspond to M pieces of data in the N pieces of data, the M is the minimum value of N, K and Q, or the M is the smaller value of N and K, or the M is the smaller value of N and Q, and the K is the maximum value of the number of PSFCHs which bear the feedback information and are determined according to the terminal capability; and Q is the maximum value of the number of PSFCHs carrying feedback information when the maximum transmission power is adopted.
2. The method of claim 1, wherein Q satisfies the following expression:
Figure FDA0002446433910000011
alternatively, the first and second electrodes may be,
Figure FDA0002446433910000012
alternatively, the first and second electrodes may be,
Figure FDA0002446433910000013
alternatively, the first and second electrodes may be,
Figure FDA0002446433910000014
wherein, PmaxIs the maximum transmit power; ptIs the transmit power of the PSFCH carrying one feedback information.
3. The method of claim 2, wherein P istIs predefined; alternatively, the first and second electrodes may be,
the P istThe transmission power of the PSFCH carrying the feedback information comprises the following steps:
the P istThe method includes that the PSFCH is used for bearing first feedback information, the first feedback information corresponds to first data in N data, the service priority of the first data in the N data is highest, or the data transmission distance of the first data in the N data is maximum, or a modulation coding strategy MC of the first data in the N dataThe index of S is minimal.
4. A method according to any one of claims 1 to 3, wherein when M is less than N, the M PSFCHs are: and M PSFCHs carrying feedback information corresponding to the N data and having continuous indexes of frequency domain resources of the PSFCHs in the N PSFCHs.
5. The method according to claim 4, wherein the minimum index of the frequency domain resources of a PSFCH of the M PSFCHs is: the minimum index of the frequency domain resources of the PSFCH in the M PSFCHs with consecutive indexes of the L groups of frequency domain resources included in the N PSFCHs carrying the feedback information corresponding to the N data, and L is the total number of the M PSFCHs with consecutive indexes of the frequency domain resources of the PSFCH in the N PSFCHs carrying the feedback information corresponding to the N data.
6. The method according to claim 4 or 5, wherein when W is smaller than M, said W is a maximum number of consecutive indexes of frequency domain resources of PSFCHs in N PSFCHs carrying feedback information corresponding to said N data, and said M PSFCHs are: the first PSFCHs are W PSFCHs with consecutive indexes of frequency domain resources of the PSFCHs in the N PSFCHs carrying the feedback information corresponding to the N data, the M-W second PSFCHs are arranged at first M-W bits in the order from small to large according to the indexes of code domain resources of the PSFCHs in the N-W second PSFCHs, and the N-W second PSFCHs are PSFCHs other than the W first PSFCHs in the N PSFCHs carrying the feedback information corresponding to the N data.
7. The method according to any one of claims 4 to 6, wherein the data transmission distances of the N data are the same.
8. The method according to claim 7, wherein when M is smaller than N and the data transmission distances of the N data are different, the M data corresponding to the M feedback information carried on the M PSFCHs are arranged with the data transmission distances of the first M bits in the N data in order of the data transmission distances from small to large.
9. The method according to any of claims 4 to 8, wherein the service priorities of the N data are the same.
10. The method of claim 9, wherein when M is less than N and the traffic priorities of the N data are different, the traffic priorities of the M data corresponding to the M feedback information carried on the M PSFCHs are arranged in the first M bits in the N data according to the order of the traffic priorities of the data from high to low.
11. A method of receiving feedback information, the method comprising:
sending N data on N physical side uplink shared channels PSSCH, wherein N is a positive integer;
receiving M pieces of feedback information on M physical sidelink control channels PSFCH; the M pieces of feedback information correspond to M pieces of data in the N pieces of data, wherein M is the smaller value of N and K, and K is the maximum value of the number of PSFCHs which bear the feedback information and are determined according to the terminal capability.
12. The method of claim 11, wherein when M is smaller than N, the M data corresponding to the M feedback information are arranged at the top M bits of traffic priority of the data in the N data in order of the traffic priority of the data from high to low.
13. A communication apparatus, comprising a receiving unit and a transmitting unit;
the receiving unit is configured to receive N data on N physical sidelink shared channels PSSCH, where N is a positive integer;
the sending unit is configured to send M pieces of feedback information on M physical sidelink control channels PSFCH, where the M pieces of feedback information correspond to M pieces of data in the N pieces of data, where M is a minimum value of N, K and Q, or M is a smaller value of N and K, or M is a smaller value of N and Q, and K is a maximum value of the number of PSFCHs that carry feedback information and are determined according to a terminal capability; and Q is the maximum value of the number of PSFCHs carrying feedback information when the maximum transmission power is adopted.
14. The communications apparatus of claim 13, wherein Q satisfies the following expression:
Figure FDA0002446433910000021
alternatively, the first and second electrodes may be,
Figure FDA0002446433910000022
alternatively, the first and second electrodes may be,
Figure FDA0002446433910000023
alternatively, the first and second electrodes may be,
Figure FDA0002446433910000024
wherein, PmaxIs the maximum transmit power; ptIs the transmit power of the PSFCH carrying one feedback information.
15. The communications apparatus of claim 14, wherein the PtIs predefined; alternatively, the first and second electrodes may be,
the P istThe transmission power of the PSFCH carrying the feedback information comprises the following steps:
the P istThe method includes that the PSFCH is used for carrying first feedback information, the first feedback information corresponds to first data in N data, the service priority of the first data in the N data is highest, or the data transmission distance of the first data in the N data is maximum, or the first data in the N data isAnd the index of the modulation coding strategy MCS in the N data is minimum.
16. The communications apparatus according to any one of claims 13 to 15, wherein when M is less than N, the M PSFCHs are: and M PSFCHs carrying feedback information corresponding to the N data and having continuous indexes of frequency domain resources of the PSFCHs in the N PSFCHs.
17. The communications apparatus of claim 16, wherein a minimum index of frequency domain resources of a PSFCH of the M PSFCHs is: the minimum index of the frequency domain resources of the PSFCH in the M PSFCHs with consecutive indexes of the L groups of frequency domain resources included in the N PSFCHs carrying the feedback information corresponding to the N data, and L is the total number of the M PSFCHs with consecutive indexes of the frequency domain resources of the PSFCH in the N PSFCHs carrying the feedback information corresponding to the N data.
18. The communications apparatus according to claim 16 or 17, wherein when W is less than M, the W is a maximum number of consecutive indexes of frequency domain resources of PSFCHs in the N PSFCHs carrying feedback information corresponding to the N data, and the M PSFCHs are: the first PSFCHs are W PSFCHs with consecutive indexes of frequency domain resources of the PSFCHs in the N PSFCHs carrying the feedback information corresponding to the N data, the M-W second PSFCHs are arranged at first M-W bits in the order from small to large according to the indexes of code domain resources of the PSFCHs in the N-W second PSFCHs, and the N-W second PSFCHs are PSFCHs other than the W first PSFCHs in the N PSFCHs carrying the feedback information corresponding to the N data.
19. The communication apparatus according to any of claims 16 to 18, wherein the data transmission distances of the N data are the same.
20. The communications apparatus according to claim 19, wherein when M is smaller than N and the data transmission distances of the N data are different, the M data corresponding to the M feedback information carried on the M PSFCHs are arranged with the data transmission distances of the first M bits among the N data in order of the data transmission distances from small to large.
21. The communication apparatus according to any of claims 16 to 20, wherein the service priorities of the N data are the same.
22. The communications apparatus as claimed in claim 21, wherein when M is smaller than N and traffic priorities of the N data are different, the M data corresponding to the M feedback information carried on the M PSFCHs are arranged at first M bits among the N data in order of the traffic priorities of the data from high to low.
23. A communication apparatus, comprising a receiving unit and a transmitting unit;
the sending unit is configured to send N data on N physical sidelink shared channels PSSCH, where N is a positive integer;
the receiving unit is configured to receive M pieces of feedback information on M physical sidelink control channels PSFCH; the M pieces of feedback information correspond to M pieces of data in the N pieces of data, wherein M is the smaller value of N and K, and K is the maximum value of the number of PSFCHs which bear the feedback information and are determined according to the terminal capability.
24. The communication apparatus according to claim 23, wherein when M is smaller than N, M data corresponding to the M feedback information are arranged in the first M bits among the N data in order from a high traffic priority to a low traffic priority of the data.
25. A communications apparatus comprising a processor and a memory, the memory having a program computer program stored therein; the processor is configured to invoke the computer program in the memory to cause the communication device to perform the method of any of claims 1 to 10, or the method of claim 11 or 12.
26. A computer-readable storage medium, having stored thereon a computer program which, when run on a computer, causes the computer to perform the method of any one of claims 1 to 10, or the method of 11 or 12.
27. A communication system comprising a communication device according to any of claims 13 to 22 and/or a communication device according to claim 23 or 24.
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