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Mixed automatic retransfer method and device

一种混合自动重传、重传的技术，应用在传输系统、数字传输系统、传输链路错误控制系统等方向，能够解决传输速率不兼容、中继终端吞吐量下降、没有移动多跳中继网络的混合自动重传机制等问题，达到减少数据传输延时、提高正确率的效果

Active Publication Date: 2008-03-26
ALCATEL LUCENT SHANGHAI BELL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in the mobile multi-hop relay network, as the network topology changes by introducing relay stations into the wireless network, new problems arise
First of all, from the perspective of transmission, different wireless environments may cause a great difference in the performance of hybrid automatic retransmission between multiple hops, which will lead to the incompatibility of the transmission rate of different hops, and the result is that the throughput of the relay terminal Decline
Second, due to the allocation of resources to access and relay, it may lead to exhaustion of physical layer resources
Third, retransmissions with HARQ across multiple hops may cause additional latency, especially in systems that use time slots in frames to distinguish different terminals
[0005] At present, there is no hybrid automatic retransmission mechanism suitable for mobile multi-hop relay networks in the prior art

Method used

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  • Mixed automatic retransfer method and device
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  • Mixed automatic retransfer method and device

Examples

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Embodiment 1

[0035] Embodiment 1: Active mobile multi-hop relay hybrid automatic retransmission

[0036] According to the embodiment of the present invention, the main feature of the active mobile multi-hop relay hybrid automatic retransmission is that after receiving the data packet from the previous hop device, the relay station verifies whether the data packet is correct, and actively sends the verification result to the For the previous hop device and base station for controlling resource allocation. Wherein, if it is the first transmission of the data packet, no matter whether the data packet is correct or not, it is forwarded to the next-hop device. If it is a retransmission of the data packet, if the verification result is wrong, the data packet is not forwarded to the next hop device, and the verification result is reported to the base station, and the base station is requested to allocate resources to the previous hop device for retransmission. If the verification result is corre...

Embodiment 2

[0130] Embodiment 2: Passive mobile multi-hop relay hybrid automatic retransmission

[0131] According to the embodiment of the present invention, the main feature of passive mobile multi-hop relay hybrid automatic retransmission is that after receiving the data packet from the previous hop device, the relay station directly forwards the data packet without actively informing the previous hop The result of the verification of the packet by the device and the base station used to control resource allocation. Relay stations simply forward data. Among them, when the relay station receives the retransmitted data packet, it will combine it with the previously received data packet. If the CRC check of the combined data packet is correct, it will forward the combined data packet to the next hop device, otherwise it will directly Forward received packets to the next hop device. The method flow of this embodiment will be described in detail below with reference to FIG. 6 and FIG. 7 ....

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Abstract

This invention provides two kinds of mixed automatic re-transmitting units used in multi-hop network by moving multi-hop mixed automatic re-transmission actively and passively, which provides a device for mixing automatic re-transmission in a relay station of radio communication network, in which, during mixed automatic re-transmission, mixed automatic re-transmission process, a method and a device are carried out according to the resources distributed by a base station charactrizing in carrying out mixed automatic re-transmission process between one or multiple relay stations and mobile stations.

Description

technical field [0001] The invention relates to a wireless communication network, in particular to a hybrid automatic retransmission technology of a multi-hop network in wireless communication. Background technique [0002] Hybrid automatic repeat transmission is a mechanism to compensate for the deterioration of received bit error rate and frame error rate due to fast fading and shadowing. At present, in IEEE802.16e, 3GPP high-speed packet access and 3GPP long-term evolution, catch-up combining and incremental redundancy are two commonly used hybrid automatic retransmission modes. [0003] Hybrid automatic retransmission is a mature technology widely used in wireless single-hop networks, such as 3GPP HSDPA / HSUPA. But in the mobile multi-hop relay network, new problems arise as the network topology changes by introducing relay stations into the wireless network. First of all, from the perspective of transmission, different wireless environments may cause a great difference...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04B7/14
CPCH04L1/1812H04L2001/0092H04B7/14H04L1/18
Inventor 倪巍沈钢刘继民邹伟
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD
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