Method for synchronous hybrid automatic retransmission

A hybrid automatic retransmission and retransmission technology, which is applied in the direction of error prevention/detection, network traffic/resource management, and electrical components using the return channel, can solve the problem of low diversity gain of retransmission packets, increase system overhead, The effect of improving efficiency

Inactive Publication Date: 2010-01-27
罗莲华
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for synchronous hybrid automatic retransmission, which solves the problem that the traditional synchronous non-adaptive HARQ transmission parameters are not changeable, resulting in low diversity gain of retransmission packets. Under the same premise, it can bring frequency diversity and even space diversity gain, and greatly improve the combination gain of the data packet at the receiving end

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  • Method for synchronous hybrid automatic retransmission
  • Method for synchronous hybrid automatic retransmission
  • Method for synchronous hybrid automatic retransmission

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0028] The main idea of ​​the present invention is: when sending user data for the first time, send data on the resource block L in the subframe; when sending retransmission data, use the multiple of the unit frame length as the retransmission interval, The retransmission data block is sent on the resource block position (L+ΔL×N)%M, where ΔL is the resource block offset for retransmission, N is the number of retransmissions, and M is the synchronous HARQ resource in the subframe total number of blocks.

[0029] Wherein, ΔL is used as a resource block offset for retransmission and is a fixed value every time data is retransmitted. ΔL can adjust the position of the retransmission packet, and can obtain additional frequency diversity, and ΔL can be set within the range of M / 10 of the number of resource blocks.

[0030] The improved synchronous H...

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Abstract

The invention discloses a method for synchronous hybrid automatic retransmission, which comprises that: when user data is transmitted for the first time, the data is transmitted on a resource block L in a subframe; and when the retransmission data is transmitted, a multiple of a unit frame length is taken as a retransmission interval, a retransmission data block is transmitted at a resource block position (L+ delta L*N) percent M of a corresponding subframe, wherein the delta L is retransmission resource block offset; N is times of retransmission; and M is the sum of synchronous hybrid automatic retransmission resource blocks in the subframe. The method solves the problem of low diversity gain of retransmission packets due to incapacity of changing the conventional synchronous non-adaptive HARQ retransmission parameters, can bring frequency diversity and even space diversity gain on the premise of the equivalent overhead of a synchronous non-adaptive HARQ mode, and greatly improves the combined gain of data packets at a receiving end.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a method for synchronous hybrid automatic retransmission. Background technique [0002] Hybrid Automatic Retransmission Request (HARQ for short) is a technology jointly used by Automatic Retransmission Request (ARQ for short) and forward error correction coding (Forward Error Correction). HARQ contains parity bits for error correction and error detection in each data packet sent. If the number of erroneous bits in the received packet is within the error correction capability, the error will be corrected by itself; when the error is serious and has exceeded the error correction capability of FEC, the sender will be notified to resend. [0003] Synchronous non-adaptive HARQ means that the transmission (retransmission) of a HARQ process occurs at a fixed time. Since the receiving end knows the transmission time in advance, no additional signaling overhead is required to identify...

Claims

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Application Information

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IPC IPC(8): H04L1/18H04W28/04
Inventor 方华
Owner 罗莲华
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