Communication method, device and system

A communication method and information indication technology, applied in the field of communication, can solve the problems of inaccurate feedback information and data transmission errors, and achieve the effect of improving accuracy

Active Publication Date: 2022-04-22
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in the prior art, when the terminal device at the receiving end does not recognize a data block carried on a certain PSSCH, the terminal device at the receiving end will give feedback according to the decoding results of the data blocks received on the remaining PSSCHs, thus causing The terminal device at the receiving end feeds back inaccurate information to the terminal device at the sending end, resulting in errors in data transmission

Method used

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  • Communication method, device and system
  • Communication method, device and system
  • Communication method, device and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0362] Embodiment 1. A communication method, which is applied to a first terminal device, and the method includes:

[0363] Respectively receive data sent by the second terminal device through n physical direct link shared channels PSSCH, where n is 2, 3 or 4;

[0364] According to the received data, determine 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;

[0365] On the target frequency domain resource, send the first information to the second terminal device through PSFCH, where the first information is used to indicate the number of PSSCHs carrying the data received by the first terminal device.

Embodiment 2

[0366] Embodiment 2. The method according to Embodiment 1, wherein the sending the first information to the second terminal device through PSFCH on the target frequency domain resource includes:

[0367] determining a target sequence group for feeding back the first information from at least two sequence groups according to the received data;

[0368] Using the target sequence group on the target frequency domain resource, sending the first information to the second terminal device through the PSFCH.

Embodiment 3

[0369] Embodiment 3. The method according to Embodiment 2, wherein the first information includes 2-bit information; when the first bit information in the 2-bit information is 0, the target sequence group is the at least two The first sequence group in the sequence group, when the first bit information is 1, the target sequence group is the second sequence group in the at least two sequence groups, the second sequence group and the first sequence group A series of groups are different;

[0370] When the second bit information in the 2-bit information is 0, the target frequency domain resource is the first PSFCH frequency domain resource among the plurality of PSFCH frequency domain resources, and when the second bit information is 1, the The target frequency domain resource is a second PSFCH frequency domain resource among the plurality of PSFCH frequency domain resources, and the second PSFCH frequency domain resource is different from the first PSFCH frequency domain resourc...

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Abstract

The present application provides a communication method, device and system, the method comprising: respectively receiving the data sent by the second terminal device through n physical direct link shared channels PSSCH, where n is 2, 3 or 4; according to the received data , determining a target frequency domain resource for feeding back first information from multiple physical direct link feedback channel PSFCH frequency domain resources corresponding to the n PSSCHs; The terminal device sends the first information, where the first information is used to indicate the number of PSSCHs that carry the data received by the first terminal device. The communication method, device and system provided in the present application can avoid demodulation errors caused by the first terminal equipment failing to recognize the data transmitted on one or some PSSCHs, thereby improving the accuracy of data transmission.

Description

technical field [0001] The embodiments of the present application relate to the field of communication technologies, and in particular, to a communication method, device, and system. Background technique [0002] Hybrid Automatic Repeat reQuest (HARQ) is a technology formed by combining forward error correction coding (Forward Error Correction, FEC) and automatic repeat reQuest (Auto Repeat reQuest, ARQ). The HARQ feedback information of a Physical Sidelink Shared Channel (PSSCH) is usually transmitted by a Physical Sidelink Feedback Channel (PSFCH). [0003] In the prior art, PSFCH feedback resources appear in N slots (slots) period, and the value of N is 1, 2 and 4 at present. Therefore, for a PSSCH appearing in slot n, the corresponding PSFCH appears in slot n+a. Since PSFCH resources are insufficient, there is a situation of PSFCH resource multiplexing, that is, HARQ feedback information of multiple PSSCHs is fed back through one PSFCH resource. For example: terminal ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L5/00
CPCH04L5/001H04L5/0055H04L5/00
Inventor 刘云王键
Owner HUAWEI TECH CO LTD
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