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Merging method and device of harq

A relative position, hybrid automatic retransmission technology, applied in the field of communication, can solve the problem of large delay and overhead of storage resource processing, and achieve the effect of improving system efficiency and saving system storage resources.

Active Publication Date: 2017-07-11
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main purpose of the present invention is to provide a HARQ combining solution to at least solve the problem in the above-mentioned related art that HARQ combining consumes a lot of storage resources and / or has a large processing delay overhead

Method used

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  • Merging method and device of harq
  • Merging method and device of harq
  • Merging method and device of harq

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] This embodiment takes the HARQ combining of the LTE system as an example, and provides a storage-saving HARQ combining implementation method and apparatus based on the LTE system, but is not limited to the LTE system, including LTE-FDD and LTE-TDD. Corresponding to various scenarios of the LTE system, the following describes the HARQ combining method for saving storage resources in various situations that may occur in the HARQ combining process in this embodiment.

[0055] It should be noted that in the process of HARQ merging, the length of the HARQ buffer is the length of the original information of the sender. For a HARQ merging, the length of the HARQ buffer is determined, and it is also saved after each HARQ merging. Merge results' length.

[0056] During the implementation process, according to the length of the 'data received this time' and its different positions in the HARQ buffer, the scenarios of HARQ merging can be summarized into the following three situati...

Embodiment 2

[0073] Assume that the maximum packet length of the sender is 6144bit, that is, the length of the HARQ buffer is 6144bit, and a packet of data with a length of 6144bit is sent 4 times before being decoded correctly (that is, this packet of data has undergone 1 initial transmission and 3 retransmissions). transmission), the data packets retransmitted for 3 times just conform to the 3 different situations described above (that is, the length of the received data is less than the length of the HARQ buffer during the first retransmission, and it is not wrapped; the second retransmission When the length of the received data is smaller than the length of the HARQ buffer, and there is a wrapping situation; the length of the received data is greater than the length of the HARQ buffer during the third retransmission). When the data packet is transmitted for the first time, there is no last HARQ combination result, so the HARQ combination operation does not need to be performed. The impl...

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Abstract

The invention discloses a hybrid automatic repeat request (HARQ) combining method and device. The method includes the following steps: storing the data received this time in the HARQ buffer; HARQ merges the data with the last HARQ merged result read from the external memory, and writes the HARQ merged result to the corresponding position in the HARQ cache; outputs all the data stored in the HARQ cache to the external memory , clear the HARQ cache. The invention saves system storage resources and improves system efficiency.

Description

technical field [0001] The present invention relates to the field of communications, and in particular, to a method and device for combining a hybrid automatic repeat request (HARQ for short). Background technique [0002] HARQ is a key technology in high-speed wireless communication systems such as Long-Term Evolution (LTE) and World Interoperability for Microwave Access (WiMAX). The advantages of Forward Error Correction (FEC) and Automatic Repeat Request (ARQ) play a very important role in enhancing the transmission capability of the system. [0003] In a wireless communication system with HARQ mechanism, if the transmitted data cannot be decoded correctly after one transmission, the data transmitted this time will be saved, and after a certain period of time, the sender will resend the same packet of data , before the receiving end decodes the retransmitted data, it takes out the 'last merging result' saved last time, merges it with the retransmitted 'received data this...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/18
CPCH04L1/1845
Inventor 董亮王喜瑜吴枫陈月强
Owner ZTE CORP