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Combined pre-coding and power distribution method in multicast network based on network coding

A joint precoding and network coding technology, applied in the field of wireless communication, can solve the problem that the model is difficult to be widely used

Inactive Publication Date: 2009-07-08
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

[0005] 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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  • Combined pre-coding and power distribution method in multicast network based on network coding
  • Combined pre-coding and power distribution method in multicast network based on network coding
  • Combined pre-coding and power distribution method in multicast network based on network coding

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Embodiment Construction

[0030]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.

[0031] Such as figure 1 As shown, this example involves a two-source s 1 , s 2 , two nights d 1 、d 2 , a multicast network unit with N relays, 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 The transmission range of the relay node cluster r covers two sinks, and can assist the two sources to send information to the sink.

[0032] The purpose of this embodiment is to introduce the analog network coding of the physical l...

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Abstract

The invention provides a combined pre-coding and power allocation method of the multi-cast network based on the network coding in the wireless communication field. In the invention, a multi-cast network formed by two-source, two-place and arbitrary relaying cluster is adopted. Two sinks need to obtain the information of each source and can not cross-transmit the signal due to the limit of the sending power, so the relaying node is responsible for forwarding information of each source. Through introducing simulation network coding into the relaying, namely, the received aliasing signal of the two sources is broadcast out after linear amplification, thus minimizing the transmission time to the maximum extent. The invention improves the network error frame performance and enhances the overall through put of the network by introducing the combined pre-coding and power allocation.

Description

technical field [0001] The invention relates to a method in the technical field of wireless communication, in particular to a joint precoding and power allocation method in a multicast network based on 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 method appearing in the computer network is an effective method that can significantly increase the network capacity, and it improves the data t...

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Application Information

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IPC IPC(8): H04W52/42H04L1/06H04L25/03
Inventor 李骏陈文舒稚晖陆旭
Owner SHANGHAI JIAO TONG UNIV
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