HARQ retransmission method and device and HARQ retransmission receiving method and device

A technology of retransmission device and preset method, which is applied in the direction of using the return channel for error prevention/detection, etc. It can solve problems such as HARQ process conflicts and retransmission competition, and achieve the effect of high retransmission success rate and small negative impact

Inactive Publication Date: 2013-09-25
BEIJING UNIV OF POSTS & TELECOMM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sequence pattern of the pre-defined retransmission process may cause retransmission competition, that is, the retransmission HARQ process mapped from other carriers conflicts with the new / retransmission HARQ process on this carrier

Method used

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  • HARQ retransmission method and device and HARQ retransmission receiving method and device
  • HARQ retransmission method and device and HARQ retransmission receiving method and device
  • HARQ retransmission method and device and HARQ retransmission receiving method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The HARQ retransmission method of this embodiment includes the following steps:

[0048] Step A1: When querying the newly transmitted carrier as the base point, other than the newly transmitted carrier 2 m The number N of the retransmission carrier in the carrier, and add m bits in the control signaling to indicate the number N; when there are 4 new carriers and candidate carriers for retransmission, there are 5 carriers in total, if dynamic mapping is used The method requires 3 bits, whereas with this embodiment only 2 bits are required. The use of carriers other than newly transmitted carriers for indication can be regarded as a differential indication; the following uses the number of carriers including newly transmitted carriers and retransmitted carriers with a total of 5 carriers as an example for implementation.

[0049] In the following table, there are 5 carriers in total, which are Carrier A, Carrier B, Carrier C, Carrier D, and Carrier E; among them, the new...

Embodiment 2

[0055] The HARQ retransmission method of this embodiment includes the following steps:

[0056] Step A0: Compare the channel quality of each carrier by a preset method, select the carrier with the best channel quality as the retransmission carrier, and determine whether the carrier with the best channel quality is a new transmission carrier,

[0057] If not, go to step A1;

[0058] If yes, use the new carrier to retransmit;

[0059] Step A1: Query the 2 other than the newly transmitted carrier when the newly transmitted carrier is used as the base point m The number N of the retransmission carrier in the carrier, and adding m bits in the control signaling to indicate the number N; wherein, m is a positive integer;

[0060] Step A2: Send the control signaling, and use the retransmission carrier numbered N for retransmission.

[0061]In this embodiment, compared with Embodiment 1, the comparison of the channel quality of each carrier is judged by the preset method, and the ca...

Embodiment 3

[0064] The HARQ retransmission method of this embodiment includes the following steps:

[0065] Step A0: Compare the channel quality of each carrier by a preset method, select the carrier with the best channel quality as the retransmission carrier, and determine whether the carrier with the best channel quality is a new transmission carrier,

[0066] If not, go to step A1;

[0067] If yes, use the new carrier to retransmit;

[0068] Step A1: Query the 2 other than the newly transmitted carrier when the newly transmitted carrier is used as the base point m The number N of the retransmission carrier in the carrier, and adding m bits in the control signaling to indicate the number N; wherein, m is a positive integer;

[0069] Step A2: Send the control signaling, and use the retransmission carrier numbered N for retransmission.

[0070] Wherein, the preset method is a link-level mapping method. Further, the link-level mapping method is an effective SINR mapping method or a mut...

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Abstract

The invention discloses an HARQ retransmission method and device and an HARQ retransmission receiving method and device. The HARQ retransmission method and device and the HARQ retransmission receiving method and device are designed for solving the problem that a retransmission success rate and few negative effects can not be ensured at the same time in the current HARQ retransmission technology. The method includes the following steps that firstly, a number N of a retransmission carrier wave of 2m carrier waves besides a new carrier wave is inquired when the new carrier wave is used as a base point, an m bit is newly added in a control signal to represent the number N and the m is a positive integer and secondly, a control signal is transmitted and the carrier wave with the number N is used for retransmission. The HARQ retransmission receiving method includes the step of B1 of requesting a transmission carrier wave corresponding to the number N in the 2m carrier waves besides the new carrier wave is requested, when the new carrier wave is used as a base point and the step of B2 of receiving retransmission from the carrier wave corresponding to the number N. The HARQ retransmission method and device and the HARQ retransmission receiving method and device have the advantages of being high in retransmission success rate, moderate in the length of the control signal and the like.

Description

technical field [0001] In the field of wireless communication, the present invention particularly relates to a HARQ retransmission method and device, and a method and device for receiving HARQ retransmission. Background technique [0002] HARQ (Hybrid Automatic Repeat Request, HARQ) is a retransmission method based on the combination of ARQ automatic repeat request and FEC forward error correction, and is used in LTE communication system. Usually, a terminal receives data on 5 component carriers at most. Each component carrier has a characteristic of great link difference. [0003] The existing HARQ retransmission methods mainly include the following three types: [0004] The first fixed mapping method: directly use the new transmission carrier for retransmission, which is simple to implement, but cannot obtain frequency domain diversity gain, and the success rate of retransmission is low; [0005] The second dynamic mapping method: the HARQ process and each carrier are f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18
Inventor 田辉林尚静汲群马志刚
Owner BEIJING UNIV OF POSTS & TELECOMM
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