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Method for improving performance of synchronous non-self-adapting mixed automatic retransmission

A hybrid automatic retransmission and non-adaptive technology, which is applied in the direction of using the return channel for error prevention/detection, multi-frequency code system, etc., can solve the problems of reduced combining gain and high number of retransmissions, so as to improve the combining gain of retransmission , avoid the effect of increasing the number of retransmissions and increasing signaling overhead

Inactive Publication Date: 2013-01-16
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method for improving the performance of synchronous non-adaptive hybrid automatic retransmission, which can effectively solve the problem of too many retransmissions and reduced combining gain due to the existence of interference in the synchronous non-adaptive HARQ mechanism. question

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  • Method for improving performance of synchronous non-self-adapting mixed automatic retransmission
  • Method for improving performance of synchronous non-self-adapting mixed automatic retransmission
  • Method for improving performance of synchronous non-self-adapting mixed automatic retransmission

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Embodiment 1

[0036] The mapping period in this embodiment is longer than a superframe, as shown in FIG. 2 : a mapping period includes 5 wireless frames. In each radio frame including 8 subframes SF0-SF7, the synchronous HARQ subframes are fixed as SF2 and SF3. The entire synchronous HARQ subframe is a distributed resource allocation area. The subcarrier mapping method of the synchronous HARQ subframe is as follows: the synchronous HARQ subframe of the first radio frame adopts the subcarrier mapping method 1, the synchronous HARQ subframe of the second radio frame adopts the subcarrier mapping method 2,... ., and so on, until the synchronous HARQ subframe of the fifth radio frame adopts subcarrier mapping mode 5. The subcarrier mapping manner is periodically changed in units of one mapping period, that is to say, the subcarrier mapping manner in the next mapping period is still the subcarrier mapping manner as shown in FIG. 2 . In this way, the physical subcarriers used for the initial HA...

Embodiment 2

[0039] In this embodiment example, the carrier mapping mode is changed with one superframe as the mapping period. . As shown in FIG. 3 , in a superframe composed of 4 radio frames, in each radio frame including 8 subframes SF0 - SF7 , the synchronous HARQ subframes are fixed as SF3 and SF4 . Part of the area of ​​the synchronous HARQ subframe is a distributed resource allocation area, and the other part is a centralized resource allocation area. The subcarrier mapping method is as follows: the distributed resource allocation area in the synchronous HARQ subframe of the first radio frame adopts subcarrier mapping mode 1, and the distributed resource allocation area in the synchronous HARQ subframe of the second radio frame adopts subcarrier mapping mode 1. Carrier mapping mode 2, ..., and so on, the distributed resource allocation area in the synchronous HARQ subframe up to the fourth radio frame adopts subcarrier mapping mode 4. In this way, in fact, because the physical sub...

Embodiment 3

[0043] In this embodiment, a mapping period includes 3 radio frames, and the synchronous HARQ subframes in each radio frame including 8 subframes are fixed as SF2 and SF3. In the radio frame of this mapping period, the entire area of ​​some synchronous HARQ subframes is a distributed resource allocation area, some areas of a synchronous HARQ subframe are distributed resource allocation areas, and the other part is a centralized resource allocation area , and the ratio of the two distribution areas is variable. The subcarrier mapping method is as follows: the distributed resource allocation area in the synchronous HARQ subframe of the first radio frame adopts subcarrier mapping mode 1, and the distributed resource allocation area of ​​the synchronous HARQ subframe in the second radio frame adopts subcarrier Mapping method 2, ..., and so on. In this way, the physical subcarriers of the initial HARQ transmission and each retransmission are different, so interference can be effec...

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Abstract

The invention relates to a method for improving the performance of synchronous non-self-adapting mixed automatic retransmission, used in a wireless communication system adopting an orthogonal frequency-division multiplexing technology. The method comprises the following steps: a logic subcarrier is mapped to a physical subcarrier for data transmission by adopting different subcarrier mapping modes on a distributed-type resource distribution region of synchronous HARQ subframes when data is primarily transmitted and retransmitted for each time at a sending end in the HARQ process of the synchronous non-self-adapting mixed automatic retransmission; the subcarrier mapping modes adopted by the synchronous HARQ subframes periodically change by using a mapping cycle as a unit; the mapping cyclecomprises a plurality of continuous wireless frames, and the synchronous HARQ subframes in the wireless frames in the mapping cycle have fixed positions. The invention avoids increasing a retransmission number caused by interference, can obtain the frequency diversity gain and can improve the retransmission combination gain while not increasing the signaling overhead of the system.

Description

technical field [0001] The present invention relates to a hybrid automatic retransmission (HARQ, Hybrid Automatic Retransmission Request) technology for data transmission in a mobile communication system, in particular to synchronous non-synchronous A method for adaptive HARQ. Background technique [0002] HARQ is a technology jointly used by automatic retransmission (ARQ, Automatic Retransmission Request) and forward error correction coding (FEC, Forward Error Correction). HARQ contains parity bits for error correction and error detection in each data packet sent. If the number of error bits in the received packet is within the range of error correction capability, the error will be corrected by itself; when the error is serious and has exceeded the range of error correction capability of FEC, the sender will be notified to resend the data packet. Using HARQ technology to combine automatic retransmission and forward error correction coding can obtain additional signal-to-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/18H04L27/26
Inventor 王军虎孙长印刘敏曲红云王文焕
Owner ZTE CORP