Cooperative transmission method in radio frequency energy collection relay network

Abstract

The invention belongs to the technical field of wireless communication, and discloses a cooperative transmission method in a radio frequency energy collection relay network. A source node, a destination node and a relay node are at least contained, wherein the source node and the destination node have a stable power supply; the relay node is an energy limited node; when the source node broadcasts a signal, radio frequency signal energy is collected and is converted into electric energy to be stored in a battery; and in an information transmission process, the destination node selects whether the cooperation of the relay node is needed according to a real-time channel state, and the relay node determines whether to cooperate the information transmission according to an own energy state and a channel state. According to the cooperative transmission method provided by the invention, a network transmission mode is reasonably selected from three proposed network transmission modes to use the collected energy by the relay node more effectively, so that the network transmission reliability is greatly improved; and meanwhile optimal relay node transmitting power is provided, so that the network transmission reliability can be further improved.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a cooperative transmission method in a radio frequency energy harvesting relay network. Background technique [0002] With the development of information technology, more and more services and businesses are added to the wireless network, such as smart home, medical body area network, wireless sensor network, etc., making people's life and work more convenient. However, at the same time, the number of nodes in the wireless network has also shown a blowout growth, and the energy consumed in the communication process has also increased significantly. In recent years, energy consumption and environmental issues have attracted more and more attention from all walks of life. In order to solve this problem, the future 5G communication system proposes green communication technology, in which energy harvesting technology is widely focused and researched as a k...

AI Technical Summary

Problems solved by technology

[0004] To sum up, the problems existing in the existing technology are: the current transmission method in the radio frequency energy harvesting relay network does not effectively use the direct transmission link from the source node to the destination node, and does not jointly consider the impact of the channel state and energy state on network transmission. Influence, the relay node only chooses the cooperative transmission method based on the energy state, which will cause the degradation of system performance due to the spectral efficiency loss caused by the half-duplex cooperation mode, resulting in the waste of energy of the relay node, resulting in low network transmission performance

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