Method and system for selecting collaboration relay node

Abstract

The invention relates to a method for selecting a collaboration relay node, which comprises the following steps of: broadcasting RTS information comprising current energy of a source node and an address of a destination node at the source node; calculating the rest energy after participating the collaboration by self and the rest energy of the source node according to the current energy and the channel state of the source node at a potential relay node which receives the RTS information, judging whether the self rest energy is lower than the rest energy of the source node or not and participating the collaboration competition if the result is positive; receiving competition information sent by the potential relay node at the destination node, and selecting the potential relay node which leads the rest energy of the source node maximum as the relay node and broadcasting CTS information to notify the relay node to participate the transmission. The method considers the energy consumption of a whole network for implementing the whole application, utilizes the collaboration transmission technique to maximize the rest energy of all nodes for participating the transmission in each transmission and leads the rest energy of all nodes in the network to obtain the balance, thereby maximizing the life cycle of the whole network.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method and system for selecting a cooperative relay node. Background technique [0002] With the rapid development and maturity of low-power radio communication technology, embedded computing technology and micro-sensor technology, a large number of low-cost micro-sensors self-organize into a Wireless Sensor Network (WSN) through wireless links. Become reality. Compared with traditional wired sensor networks (such as fire sensor networks in office buildings, etc.), wireless sensors have the characteristics of flexible placement, easy expansion, mobile nodes and self-organizing networks. Especially in the environment where people cannot or avoid entering, wireless sensors can be thrown to the area to be monitored by helicopter or rocket. The sensors organize themselves into a wireless network, perceive the information of their environment and transmit it ...

AI Technical Summary

Problems solved by technology

Obviously, it is unrealistic to charge or replace the batteries of thousands of sensor nodes, not to mention some environments that are inconvenient for people to enter (such as battlefields), so improving network energy efficiency, balancing network energy consumption, extending network operating life, Preventing network separation is the core topic of WSN research

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