Low-power dissipation media access control method of node dynamic state resting

Abstract

A low-power media access control method of node dynamic sleeping includes the following steps: (1) organizing the network topology to clustering topology and realize a coarse-grained clock synchronization between the node inside the cluster and the cluster head and make the node work and sleep periodically; (2) the nodes have three operating modes: a sending mode, a receiving mode and a cycle work mode, wherein the node of the cycle work mode is characterized in that the nodes work or sleep periodically and the actual work and sleep time period of the nodes changes dynamically and the operation sub-time-period of the neighboring node can be calculated; (3) in one work cycle, the operation sub-time-period of any two adjacent nodes can be overlapped to guarantee the communication; (4) the node can intercept the packet sent by the adjacent node and adjust the sleep time period according to the information carried by the packet to reduce the carrier interception times; (5) dynamically adjusting the busy and idle degree of the node according to different data sampling rates so as to reduce the power consumption while guaranteeing the throughput. The method, which is simple and reliable, has advantages of low power consumption, short delay, strong adaptive capacity and effectively prolonged life cycle of the network.

Description

technical field [0001] The invention belongs to the technical field of communication protocols of wireless sensor networks, and in particular relates to a low-power consumption media access control method in which nodes are dynamically dormant. Background technique [0002] In the field of Wireless Sensor Networks (WSN for short), the network life cycle is the primary criterion for measuring various communication technologies. In order to extend the life cycle of the network, it is necessary to reduce power consumption, including node hardware power consumption and communication power consumption. The reduction of communication power consumption involves the research of technologies such as radio frequency control, physical layer, media access control protocol and routing protocol. Media Access Control Protocol (Media Access Control Protocol, referred to as MAC protocol) is used to solve the problem of channel contention in wireless sensor networks. The design of MAC proto...

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Problems solved by technology

The disadvantage of this protocol is that the listening time interval is proportional to the number of pilot bytes, that is, reducing the number of listening times is at the expense of increasing the energy consumption of sending and receiving data

[0005] From the above, it can be seen that various MAC protocols are trying to reduce energy consumption while balancing throughput, delay and other indicators. a difficulty

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