Relay node selection method for minimizing end-to-end sending power in Rayleigh fading channel

A relay node and sending node technology, applied in the field of communication, can solve the problem of high sending power, etc., and achieve the effect of reducing power consumption and increasing system efficiency

Inactive Publication Date: 2014-12-10
ZHEJIANG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to overcome the disadvantage of the large total transmission power of the end-to-end nodes in the existing relay network, the present invention provides a way to select the rel...

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  • Relay node selection method for minimizing end-to-end sending power in Rayleigh fading channel
  • Relay node selection method for minimizing end-to-end sending power in Rayleigh fading channel
  • Relay node selection method for minimizing end-to-end sending power in Rayleigh fading channel

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Embodiment Construction

[0072] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0073] refer to figure 1 and figure 2 , a relay node selection method that minimizes the end-to-end transmission power in a Rayleigh fading channel. The implementation of this method can reduce the total transmission power and increase the system benefit. The present invention is based on a network system with K relay nodes (such as figure 1 shown). In the relay network system, the source node forwards the information to the destination node through the relay nodes with different power. The method proposed by the invention for selecting a suitable relay node to minimize the total transmission power for the relay network has the following steps (such as figure 2 shown):

[0074] 1) Each relay node senses the channel gain from the sending node to itself and from itself to the receiving node, and then notifies the sending node of the channel gain and the ...

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Abstract

The invention discloses a relay node selection method for minimizing end-to-end sending power in Rayleigh fading channel. The method comprises the following steps: 1) each relay node perceiving channel gain from a sending node to the relay node and channel gain from the relay node to a receiving node, and then notifying the sending node of the channel gains and the maximum sending power of the relay node; 2) the sending node selecting all satisfactory relay nodes; 3) the sending node dividing all satisfactory relay nodes into two types k1 and k2; 4) respectively selecting optimal relay node in the two types, k*1 and k*2, comparing power conditions while using two relay nodes, and selecting the optimal relay node. The invention provides a relay node selection method that the end-to-end node selects the relay node capable of transmitting in minimum total transmission power in the Rayleigh fading channel.

Description

technical field [0001] The invention belongs to the communication field, and in particular relates to a method for an end-to-end network to select a suitable relay node to optimize the total transmission power. Background technique [0002] In wireless broadband services, cooperative communication is considered to be an effective technique to improve spectral efficiency and spatial diversity. Most cooperative communication models use single or multiple relay nodes to forward information from source nodes to destination nodes. In these relay networks, amplify-and-forward and decode-and-forward are the two most commonly used relay protocols. For a relay network, the transmission power of different source nodes and relay nodes is not exactly the same. If the source node can select an appropriate relay node when communicating with the destination node, then the spectrum efficiency and energy efficiency of the entire network will increase substantially. Therefore, it is extrem...

Claims

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Application Information

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IPC IPC(8): H04W40/22
CPCY02D30/70
Inventor 钱丽萍武航陈康妮陈庆章
Owner ZHEJIANG UNIV OF TECH
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