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Complex number field network coding-based information transmission method in downlink multicast network

A technology of network coding and information transmission, which is applied in the field of information transmission based on complex domain network coding in the downlink multicast network, and can solve the problems of low information transmission rate and network throughput

Inactive Publication Date: 2013-11-06
CHANGAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this process, the relay node simply stores and forwards the received base station information, which makes the information transmission rate and network throughput of the entire downlink multicast network low.

Method used

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  • Complex number field network coding-based information transmission method in downlink multicast network
  • Complex number field network coding-based information transmission method in downlink multicast network
  • Complex number field network coding-based information transmission method in downlink multicast network

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Embodiment

[0048] In this embodiment, the base station S through the relay node R 1 , R 2 , R 3 , R 4 to user D 1 、D 2 、D 3 、D 4 、D 5 The specific method by which the information transfer was carried out, and User D 1 、D 2 、D 3 、D 4 、D 5 Outside the transmission range of base station S.

[0049] In the first 3 time slots, the base station S sends each relay node R 1 , R 2 , R 3 , R 4 Send 3 signals x' 1 , x' 2 , x' 3 , that is slot 1, the base station S sends each relay node R 1 , R 2 , R 3 , R 4 send x' 1 , time slot 2, base station S sends each relay node R 1 , R 2 , R 3 , R 4 send x' 2 , time slot 3, base station S sends each relay node R 1 , R 2 , R 3 , R 4 send x' 3 ;

[0050] Time slot 4, relay node R i (i=1,2,3,4) for signal x' 1 , x' 2 , x' 3 detected by x ^ i = x ...

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Abstract

The invention relates to an information transmission method in a downlink multicast network, in particular to a complex number field network coding-based information transmission method in the downlink multicast network. In the method, users in the downlink multicast network are outside of a transmission range of a base station; in the first M time slots, the base station transmits signals to N relay nodes; in the time slot M+1, the relay nodes perform complex number field network coding on detected base station signals and transmit the coded signals to each of the users at the same time; and finally, the users receive the signals of the N relay nodes and base station information is recovered by maximum likelihood multi-user detection. Compared with a conventional relay forwarding scheme, by the method, higher network throughput can be achieved and less transmission time slot is consumed.

Description

technical field [0001] The invention relates to an information transmission method of a downlink multicast network, in particular to an information transmission method based on complex domain network coding in a downlink multicast network, the method is suitable for high-speed data in an advanced international mobile communication IMT-Advanced wireless relay network transmission. Background technique [0002] In the downlink multicast network, the information transmission method for users outside the transmission range of the base station is: the base station sends the information to the relay node, and then the relay node forwards the information to the user. During this process, the relay node simply stores and forwards the received base station information, so that the information transmission rate and network throughput of the entire downlink multicast network are low. Contents of the invention [0003] Aiming at the defects or deficiencies of the prior art, the prese...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04L1/06
Inventor 王静刘向阳林国庆
Owner CHANGAN UNIV
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