Transmitting node power distribution method in multicast network based on regenerated network coding

A technology of network coding and transmitting nodes, which is applied in the field of power distribution of transmitting nodes in a multicast network based on regenerative network coding, and can solve problems that are difficult to be widely used, so as to improve throughput, reduce transmission delay, and reduce system error frames rate effect

Inactive Publication Date: 2009-07-15
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

The two-way information flow model and the multiple access model are the only two models of wireless network coding, but in the increasingly complex network environment, these two models are difficult to be widely used

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  • Transmitting node power distribution method in multicast network based on regenerated network coding
  • Transmitting node power distribution method in multicast network based on regenerated network coding
  • Transmitting node power distribution method in multicast network based on regenerated network coding

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Embodiment Construction

[0022] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings: this embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following the described embodiment.

[0023] This embodiment involves a two-source, two-destination, single-relay multicast network unit, such as figure 1 shown. Each sink needs to receive information from two sources. Due to the limited transmission power and range of the signal, d 1 can not receive s 2 information, while d 2 also can not receive s 1 information, the transmission range of the relay node r covers the two sinks, and can assist the two sources to send information to the sink.

[0024] In this embodiment, define a system frame as x s =[x s1 , x s2 ], where x s1 for s 1 Launched sym...

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Abstract

The invention discloses an emergent nodal point power splitting method in multicast network which is based on regenerated network code in wireless communication technology filed. In the invention, as for information source terminals, two information sources s1, s2,at the same time, send broadcast signals to a relay, r and information sinks d1, d2 in a first time slot; the information sink d1 receives the signals from the information source s1 and the information sink d2 receives the signals from the information source s2; the relay r receives the aliasing signals of information sources s1 and s2; the information source power is split according to the known situations of counting channel information and instant s1 r and s2 r channel information; the relay node carries on the maximum likelihood decoding process to the aliasing signals sent by the two information sources in the first time slot; complex field totaling process is carried on to the two signals and the power is separately split for the known situations of counting channel information and instant s1 r and s2 r channel information. The method of the invention can reduce the transmission delay of the system to reduce the frame error rate of the system and improve the thruput of the system.

Description

technical field [0001] The invention relates to a method in the technical field of wireless communication, in particular to a method for allocating transmitting node power in a multicast network based on regenerative network coding. Background technique [0002] In a traditional wireless relay network, due to the limitation of the transmission power of the information source, the relay is generally used to expand the transmission range of the information source. In the wireless cooperative network proposed in recent years, the relay is used to increase the diversity gain of the source signal to reduce the error probability of information transmission. In these communication processes, after receiving the information from the source node, the relay node adopts the store-and-forward method without any data processing. At present, the network coding theory that appears in the computer network is an effective method that can significantly increase the network capacity. It impro...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/06H04W52/20
Inventor 李骏陈文韦莎陆旭
Owner SHANGHAI JIAO TONG UNIV
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