Multi-relay node selection method for rechargeable sensor network

Abstract

The invention discloses a multi-relay node selection method for a rechargeable sensor network. The method comprises the following steps of 1, selecting a relay node assisting a source node to transmit information in each timeslot according to a threshold of a relay node battery, wherein all the delay nodes meeting a battery threshold requirement are selected in each timeslot; 2, using a Markov chain to model for a charging and discharging process of the delay node battery, thus acquiring outage probability and a throughput capacity expression when the wireless network reaches a stable state; and 3, using a genetic algorithm to acquire a valuing condition of the battery threshold which allows the network throughput capacity to be maximum and the network outage probability to be minimum, and thus acquiring a setting standard of the battery threshold. According to the multi-relay node selection method for a rechargeable sensor network provided by the invention, the network outage probability can be minimized, and the throughput capacity reaches maximum.

Description

technical field [0001] The invention relates to the field of wireless communication networks, in particular to a multi-relay node selection method for a rechargeable wireless sensor network. Background technique [0002] In energy-constrained wireless networks, battery-powered devices typically have a limited duration of operation, which can significantly affect network performance. For such a network, its lifetime can be extended by frequent battery recharging / redistribution, however, this is usually inconvenient for application scenarios with a large number of devices (e.g., wireless sensor networks). It is dangerous for the device to be located in an environment containing hazardous materials, and even impractical in many other applications (eg, implanted medical devices). [0003] An alternative energy harvesting technology that can overcome the above limitations is radio frequency energy transfer technology. Radio frequency energy transmission is the process of wirele...

AI Technical Summary

Problems solved by technology

[0002] In energy-constrained wireless networks, battery-powered devices typically have a limited duration of operation, which can significantly affect network performance

For such networks, its lifetime can be extended by frequent battery recharging / redistribution, however, this is usually inconvenient for application scenarios with a large number of devices (e.g., wireless sensor networks)

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