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Transmission method, device and system in non-orthogonal cooperative communication network

A cooperative communication, non-orthogonal technology, applied in diversity/multi-antenna systems, preventing/detecting errors through diversity reception, using return channels for error prevention/detection, etc., can solve problems such as inconsistent data symbol performance, etc., to achieve The effect of alleviating asymmetry and significantly improving spectral efficiency

Active Publication Date: 2011-06-15
ALCATEL LUCENT SHANGHAI BELL CO LTD
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AI Technical Summary

Problems solved by technology

[0015] Although diversity in non-orthogonal cooperative communication is a very attractive cooperative diversity technique, which can achieve multiplexing gain in the traditional sense, and can support full rate, that is, one symbol per slot, it is very difficult for different data symbols. Symmetrical transmission, which will result in unequal performance of these data symbols

Method used

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  • Transmission method, device and system in non-orthogonal cooperative communication network
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  • Transmission method, device and system in non-orthogonal cooperative communication network

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Embodiment Construction

[0037] Proposed in the aforementioned paper by Nabar is a non-orthogonal cooperative communication system with symbol-by-symbol transmission. In the embodiment of the present invention, a non-orthogonal cooperative communication system of packet-by-packet transmission is proposed. image 3 The data transmission mechanism of the packet-based non-orthogonal cooperative communication system is shown. in such as image 3 In the packet-based transmission shown, each data packet p 1 ,p 2 ,p 3 ...includes n data symbols. For example group P 1 Include data symbol x 11 、x 21 、x 31 、x 41 、x 51 、x 61 ,...,x n1 .

[0038] Such as image 3 As shown, in the first time slot containing t 1 and the second time slot t 2 Send the first data packet p from the source node S to the destination node D in the first time interval of 1 and the second data packet p 2 , where the first data packet p is transmitted with TM1 1 , with TM2 to transmit the second data packet p 2 . And, in...

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Abstract

The invention discloses a retransmission method, a retransmission device and a retransmission system in a non-orthogonal cooperative communication network. The retransmission method comprises the following steps of: during a first time internal, transmitting a first data unit to a destination node from a source node in a first transmission mode and transmitting a second data unit to the destination node from the source node in a second transmission mode; determining whether the first data unit and the second data unit need to be retransmitted; and when one or two of the first data unit and the second data unit need to be retransmitted, retransmitting the data unit needing to be retransmitted to the destination node from the source node during a following second time interval, wherein the transmission mode used for the data unit needing to be retransmitted during the second time interval is the other transmission mode, different from the transmission mode used for the data unit needingto the retransmitted during the first time interval, of the first transmission mode and the second transmission mode.

Description

technical field [0001] The present invention relates generally to communication in cooperative communication networks, and more particularly to methods, apparatus and systems for retransmission in non-orthogonal cooperative communication networks. Background technique [0002] Currently, the cooperative relay (also known as cooperative diversity) strategy in wireless communication has attracted great interest. In cooperative relay, the relay node can process the signal received from the source node and send the processed signal to the destination node, so the destination node can combine the signal received from the relay node with the signal received from the source node according to certain rules. The directly received signals are combined. [0003] figure 1 It simply shows the cooperative communication network structure. Such as figure 1 As shown, there are two independent communication paths between the information source node S 101 and the destination node D 103, on...

Claims

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Application Information

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IPC IPC(8): H04L1/06H04L1/18H04B7/02
Inventor 梁越
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD
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