Wireless body area network MAC protocol based on wake-up mechanism, communication method and system

Abstract

Provided is a wireless body area network MAC protocol based on a wake-up mechanism. Data services in a wireless body area network are divided into periodic services, on-demand services and random services, the protocol constructs a wake-up channel and a transmission channel between a coordinator and a node, the wake-up channel is used for transmitting a wake-up signal, and the transmission channelis used for transmitting data. In addition, in the periodic service and the on-demand service, the coordinator sends a wake-up signal to the node through the wake-up channel to enable the node to enter a wake-up state. In the random service, the node sends a wake-up signal to the coordinator through a wake-up channel and enters a wake-up state. When different nodes have channel conflicts in datatransmission, random service data are preferentially transmitted, and then periodic service data and on-demand service data are transmitted through a CSMA / CA competition mechanism. The invention provides a wireless body area network MAC protocol based on a wake-up mechanism, a communication method and a communication system, which are lower in network energy consumption and high in reliability.

Description

technical field [0001] The invention relates to the field of wireless body area network, in particular to a wake-up mechanism-based wireless body area network MAC protocol, a communication method and a system. Background technique [0002] With the development of our country's society and the improvement of people's living standards, people are paying more and more attention to health issues. However, the problem of population aging in today's society is becoming increasingly serious and has become a major challenge faced by all sectors of society. In addition, chronic diseases have also become a major public health problem that endangers the health of our people. Most of these diseases can be treated or prevented if they are detected early. [0003] In this context, the wireless body area network technology with the main purpose of health monitoring came into being. Wireless body area network is a short-distance communication network composed of sensor nodes placed in di...

AI Technical Summary

Problems solved by technology

However, although the MAC protocol with periodic sleep can save energy and energy, it cannot process events in time during sleep, and may lose or delay urgent and important data that needs to be transmitted, resulting in serious consequences.

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