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Cooperative transmission method in simultaneous wireless information and power transfer relay network

A relay network and information-energy simultaneous transmission technology, applied in the field of relay cooperative transmission, can solve problems such as affecting the overall performance of the system, limited diversity gain, and insufficient node energy to complete cooperative forwarding, etc., to achieve high anti-interruption performance, guarantee The effect of recycling speed

Active Publication Date: 2016-03-02
XIDIAN UNIV
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Problems solved by technology

On the one hand, the relay nodes selected only by channel quality may not be able to complete cooperative forwarding due to the low energy of the nodes.
The diversity gain of the network is limited not only by the number of relay nodes in the network, but also by the energy state of the node itself; The relay nodes adopt the same power separation ratio, which is not conducive to the energy harvesting of relay nodes with less energy, thus affecting the overall performance of the system

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  • Cooperative transmission method in simultaneous wireless information and power transfer relay network
  • Cooperative transmission method in simultaneous wireless information and power transfer relay network
  • Cooperative transmission method in simultaneous wireless information and power transfer relay network

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Embodiment Construction

[0039] The present invention will be further described below in conjunction with the accompanying drawings. It should be noted that this embodiment is based on the technical solution, and provides detailed implementation and specific operation process, but the protection scope of the present invention is not limited to the present invention. Example.

[0040] Such as figure 1 As shown, the signal energy simultaneous interpretation relay network system used in the present invention is composed of one source node S, N relay nodes, and one destination node D. Both the source node and the relay node use rated power for data transmission, and the cooperative forwarding mode of the system is decode-and-forward (DF) mode.

[0041] Such as figure 2 Shown, the realization steps of the present invention are as follows:

[0042] Step 1: After the source node S encodes and modulates the data packet to be sent, it transmits the signal with P S The power of is sent to all relay nodes. ...

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Abstract

The invention discloses a cooperative transmission method in the simultaneous wireless information and power transfer relay network. The method comprises the steps that 1) a source node transmits a data packet to relay nodes; 2) each relay node determines whether to cooperate with the source node according to the energy state thereof, if yes, information sent from the source node is decoded and energy is collected, and otherwise, only energy is collected; and 3) a cooperative relay is selected from all relays that participate in cooperation and can carry out decoding correctly according to instantaneous channel information, and the selected relay forwards the data packet sent from the source node. The relay nodes can adjust the cooperation transmission and energy collection strategies adaptively according to the energy states thereof, and the interruption resistance of the system is effectively improved.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a relay cooperative transmission method in a signal energy simultaneous transmission network. Background technique [0002] Relay cooperation technology constructs a "virtual multi-antenna array" for the destination node through mutual cooperation between nodes, so that the receiving end can obtain higher diversity gain, which can well resist the influence of shadow fading and multipath fading. As an effective way to improve the transmission reliability and transmission coverage of wireless communication systems, this technology has received extensive attention and research. [0003] The nodes acting as relays in the cooperative relay network are not all base stations with sufficient energy supply, but often some small terminals with limited energy storage, which makes the performance of the system limited by the energy possessed by the cooperative nodes. Aiming at the prob...

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Application Information

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IPC IPC(8): H04B7/02H04B7/155
CPCH04B7/026H04B7/15542
Inventor 贺冰涛阔永红王平陈健吕璐
Owner XIDIAN UNIV
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