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Method for feeding back HARQ

A feedback method, inversely proportional technology, applied in the field of HARQ feedback, can solve problems such as data retransmission, and achieve the effect of reducing resources and improving feedback efficiency and

Active Publication Date: 2010-03-10
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In consideration of the problem existing in the related art in the data transmission process, as long as there is an error in one coding block, the entire data needs to be retransmitted, and the present invention is proposed. Therefore, the main purpose of the present invention is to provide a HARQ feedback method, to solve the above problems

Method used

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  • Method for feeding back HARQ

Examples

Experimental program
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Effect test

example 1

[0076] Figure 1a and Figure 1b A schematic diagram showing a method for a base station to adjust a HARQ feedback of a terminal, Figure 2a and Figure 2b It shows a schematic diagram of the terminal performing HARQ feedback according to the HARQ feedback method of the base station.

[0077] Such as Figure 1a , before sending data to a terminal supporting HARQ, the base station first sends a HARQ feedback method indication message 1 to the terminal, the indication message 1 instructing the terminal to adopt explicit HARQ feedback, and to perform feedback on HARQ coding blocks one by one. Then, the base station sends the HARQ resource allocation message and the HARQ coded block to the terminal, and the terminal decodes the HARQ coded block according to the HARQ resource allocation message, and gives feedback on whether the HARQ coded block is received correctly according to the method indicated in the indication message 1.

[0078] Such as Figure 2aAs shown, the encoding ...

example 2

[0083] Preset the correspondence between the length range of the data burst and the CRC length, and notify the sending end and the receiving end of the correspondence, specifically, list the lengths of the coding blocks allowed by HARQ from small to large A set of permutations: {48, 96, 144, 192, 288, 384, 480, 960, 1920, 2880, 3840, 4800}, and the 12 HARQ coding block lengths in the set are divided into 3 groups. For example, the three groups divided into are {48, 96, 144, 192}, {288, 384, 480, 960} and {1920, 2880, 3840, 4800}, where {48, 96, 144, 192} The CRC length of {288, 384, 480, 960} is CRC-12, and the CRC length of {1920, 2880, 3840, 4800} is CRC-16. Correspondingly, remove {48, 96, 144, 192} and remove the 8-bit CRC corresponding to the data burst length (including Padding) as {40, 88, 136, 184}, and set {288, 384, 480, 960} The data burst length corresponding to removing the 12-bit CRC (can include Padding) is {276, 372, 468, 948}, and the data burst length corres...

example 3

[0087] Figure 4a and Figure 4b A schematic diagram of a method for grouping data bursts during HARQ transmission is shown respectively.

[0088] Such as Figure 4a As shown, the length of a data burst after padding is 23920 bits. Since the maximum length of the data burst allowed by HARQ is 4800 bits, the data burst can be divided into 5 groups for transmission, and each coding block group contains 4784 bits, adding 16-bit CRC respectively, becomes 4800 bits, after 1 / 2 coding rate HARQ coding to form 5 HARQ coding blocks with a length of 9600 bits, each coding block group includes a HARQ coding block, each The data bursts in a coded block group are of equal length.

[0089] Such as Figure 4b As shown, the length of a data burst after padding is 23920 bits, because the maximum length of the data burst allowed by HARQ is 4800 bits, and at the same time, in order to reduce the overhead of the HARQ feedback channel, two groups are used for HARQ feedback. First, re-Padding ...

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Abstract

The invention discloses a method for feeding back HARQ, which comprises that: a sending end sends data to one or more receiving ends; a feedback mode of the receiving ends for feedback information ofthe data and / or parameters related to the feedback mode are determined according to channel characteristics, and are notified to the receiving ends. By means of the technical scheme, the feedback modeof the data is determined through the channel characteristics to reduce resources occupied by feedback channels and improve feedback efficiency and spectral efficiency of a wireless communication system.

Description

technical field [0001] The present invention relates to the communication field, in particular to a HARQ feedback method. Background technique [0002] In a wireless communication system, the base station is a device that provides services for the terminal. The base station communicates with the terminal through the up / down link. The downlink is the direction from the base station to the relay station / terminal, and the relay station to the terminal. Directions to the base station. [0003] In a wireless communication system that uses a base station to implement wireless resource scheduling control, the scheduling and allocation of system wireless resources is completed by the base station. When the base station performs scheduling and allocation of wireless resources in a harsh wireless environment, the communication receiving node may fail to decode, which will lead to the failure of this transmission and the decline of transmission efficiency. [0004] At present, automa...

Claims

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Application Information

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IPC IPC(8): H04L1/18
Inventor 关艳峰朱登魁刘颖刘向宇戴博康睿
Owner ZTE CORP
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