Análise e desenvolvimento da técnica duty cycling para redução do consumo de energia da comunicação a rádio

Abstract

The main objective of this work is to develop a technique that reduces the consumption of radio communication. For this to happen we chose to use the Duty Cycling protocol, in which the radio stays in the sleep mode most part of the time and regularly turns on to verify if another device is trying to communicate with it. That way, we developed this technique programming one of the radios periodically on the receiving mode, and when a packet comes the device will know its pair is requesting its data, then it will become a transmitter and will send its information. This technique was implemented in two forms, one operating with one channel and another one with many channels, because staying in one channel can worsen its performance, in case it starts to be interfered by another device. Therefore, if we use more channels and alternate between them, the radio will never stands on the congested channel. With the development finished, we did tests about the necessary quantity of transmissions until the devices get communication, the average time of communication and calculate the battery consumption, comparing with a radio which stays always on. Ultimately, we conclude that despite losing more than the double time of communication, using the technique 90% of battery consumption was reduced. The multichannel model has a worst performance than the single channel model operating on a low interference frequency band, however it is still better in a channel with a lot of noise and interference. Beyond that the multichannel proved being more resistant to the distance variation, however, the ideal way to use would be mixing the techniques.