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Mixed automatic retransmission requiring method based on decode reliability

A hybrid automatic retransmission and reliability technology, applied in the field of communication systems, can solve the problem of a large amount of information in reverse retransmission requests, and achieve the effect of reducing the amount of information and meeting the retransmission requirements.

Active Publication Date: 2010-07-07
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention provides a hybrid automatic repeat request method based on decoding reliability to solve the problem of large amount of reverse retransmission request information in the prior art RB-HARQ scheme

Method used

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  • Mixed automatic retransmission requiring method based on decode reliability
  • Mixed automatic retransmission requiring method based on decode reliability
  • Mixed automatic retransmission requiring method based on decode reliability

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0052] The receiving end sends the position index information of the sliding window to the transmitting end, and the transmitting end selects the bit corresponding to the code bit for retransmission according to the position index information of the sliding window.

[0053] see figure 2 , Embodiment 1 of the present invention includes the following steps:

[0054] Step S21, using a sliding window with a length of L to start sliding from the first code point, and counting the sum or average value of the |LLR| of each code point in the window;

[0055] Step S22, sending the calculated position index information of a sliding window whose sum value or average value of |LLR| is the smallest, or a plurality of sliding windows whose sum value or average value is smaller, to the transmitting end;

[0056] Step S23, the transmitting end selects the bit retransmission corresponding to the code bit according to the position index information sent by the receiving end.

[0057] The spe...

Embodiment 2

[0074] The receiving end sends index information of the sliding window to the transmitting end, and the transmitting end selects corresponding retransmission bits for retransmission according to the index information of the sliding window.

[0075] In this second embodiment, it is divided into two situations:

[0076] The first case: the index information of the sliding window does not change according to the law, and a corresponding index information can be freely designated for each sliding window.

[0077] see image 3 , the steps flow in the first case of the second embodiment of the present invention:

[0078] Step S31, using a sliding window with a length of L to start sliding from the first code point, and counting the sum or average value of the |LLR| of each code point in the window;

[0079] Step S32, sending the calculated index information of a sliding window with the smallest sum or average value, or index information of multiple sliding windows with smaller sum...

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Abstract

A requesting method of mixed automatic retransmission based on decoding reliability includes applying slide window with length of L to slide in starting from the first code bit for separately counting out absolute value sum or average value of 10g likelihood value LLR for each code bit in window, sending index information of one slide window with minimum sum or average value or multiple slide window with less sum or average value or position index information of slide window to emission end, selecting bit of corresponding code bit for retransmitting by said emission end according to said index information or said position index information sent from receiving end.

Description

technical field [0001] The present invention relates to a communication system, in particular to a Reliability-based Hybrid Automatic Repeat Request (RB-HARQ) method based on decoding reliability. Background technique [0002] In the communication system, in order to improve the reliable transmission of the system, two schemes of Forward Error Correction (Forward Error Correction, FEC) coding and Automatic Repeat Request (Automatic Repeat Request, ARQ) are adopted. The FEC scheme is generally used in occasions with high real-time requirements because of its simple transmission mechanism and small system delay; while the ARQ scheme is used in occasions with high transmission accuracy and low real-time requirements. Combining the two, that is, Hybrid Automatic Repeat Request (HARQ), can achieve better transmission performance. According to the manner in which forward error correction codes are combined at the receiving end in HARQ, there are mainly two types of HARQ: Chase Co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/18
Inventor 余荣道
Owner HUAWEI TECH CO LTD