Multi-hop cooperative transmission method based on multi-source distributed network

A distributed network and multi-hop cooperative technology, applied in the field of multi-hop cooperative transmission, can solve problems such as data block pollution, achieve the effects of improving load balancing, increasing network throughput, and reducing transmission delay

Inactive Publication Date: 2014-02-12
UNIV OF SCI & TECH BEIJING
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, in a multi-hop wireless network, the randomness of bit errors makes each hop data block likely to be "polluted", and it will obviously face great challenges to achieve high system throughput, low bit error rate and other performance indicators

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  • Multi-hop cooperative transmission method based on multi-source distributed network
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  • Multi-hop cooperative transmission method based on multi-source distributed network

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Embodiment Construction

[0021] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] figure 1 Shown is the network topology model of the multi-hop cooperative transmission method based on the multi-source distributed network of the present invention, the model includes a plurality of source nodes S i (i=1,2...,n), multiple relay node sets R j (j=1,2...,n) and a destination node D. The present invention is based on the multi-hop cooperative transmission method of the multi-source distributed network, which mainly includes the following steps:

[0023] The first step, source information transmission process: source node S i (i=1,2...,n) Divide the binary signal bit sequence to be sent into fixed-size data blocks, then perform channel coding, decentralized recombination, and constellation modulation, and send the mo...

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Abstract

The invention relates to a multi-hop cooperative transmission method based on a multi-source distributed network. The method comprises steps as follows: information source nodes disperse and regroup data frames in a selected constellation modulation mode, and signal constellations are modulated and sent to nodes in a relay set 1 in respective time slots; when the nodes receive the signals, a judgment is given; if the nodes only receive a signal of a single information source node and the constellation modulation mode of the single information source node is identical to the constellation modulation mode adopted by the nodes, the signal is directly amplified and sent to a corresponding node in a relay set 2; otherwise, after constellation modulation, random network coding, dispersion and regrouping of data frames and secondary constellation modulation are performed, the signal is sent to the corresponding node in the relay set 2; by such analogy, the nodes in the relay sets process signals in the same manner; and a target node receives signals of multiple links for joint decoding. According to the method, error probabilities of different bits are different, so that a part of a data block is protected during multi-hop transmission, and the block error rate of the whole data block of the network is reduced.

Description

technical field [0001] The invention belongs to the field of wireless communication, and in particular relates to a multi-hop cooperative transmission method based on a multi-source distributed network. Background technique [0002] With the rapid development of wireless communication technology, end users have continuously increased requirements for performance indicators such as transmission rate, reliability, and throughput of system information. In recent years, many wireless communication technologies have appeared. Existing studies have shown that multi-antenna MIMO technology can improve transmission reliability, reduce bit error rate and many other advantages. Degree and power consumption and other factors are limited. Cooperative communication technology uses multiple single-antenna nodes to establish a cooperative relationship to form virtual MIMO, which solves the multi-antenna limitation of MIMO technology in small and medium-sized devices, expands network cover...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04B7/15
Inventor 陈桂梅马忠贵陈林旗班莎
Owner UNIV OF SCI & TECH BEIJING
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