A self-adaptive media access control method using superframe in clustered WSN

Abstract

The invention discloses an adaptive media access control method using a superframe in a clustered WSN, which mainly solves the problems of high power consumption and poor flexibility in large-scale scenarios in the prior art. The scheme is: design a superframe structure based on cluster capacity self-adaptation for the cluster topology; optimize multiple multimedia access control MAC frames; set the mechanism for sending and receiving MAC frames in the superframe structure; Based on cluster capacity adaptation, each cluster head periodically sends a beacon frame to mark the start time of the non-competition period, competition period and sleep period of the cluster; all nodes in the cluster wake up when the beacon frame arrives, and in the non-competition period Sleep after sending the data of this node; the cluster head node sleeps after the competition period ends; the data frame is sent in the non-competition period; cluster entry request frame, cluster entry reply frame, cluster head rotation request frame, cluster head rotation confirmation frame and response frame Sent during the contention period. The invention has low power consumption and strong adaptability, and can be used in large-scale IoT scenarios.

Description

technical field [0001] The invention belongs to the technical field of communication, and relates to an adaptive media access control method using a superframe, in particular to an adaptive media access control method using a superframe in a clustered WSN, which can be used in a large-scale Internet of Things scene, Realize the dynamics, self-organization, and peer-to-peer of nodes in the network, and meet the needs of high-density and low-power consumption in the network. Background technique [0002] Wireless sensor network (WSN) is a new type of information sensing and acquisition system, which has the characteristics of large-scale, low cost, and low power consumption. commercial value. The wireless sensor nodes in WSN are randomly deployed in a fixed area, and transmit information to the service center through wireless, so as to realize the perception of environmental resources. Due to the limitation of wireless channel resources, energy consumption has become a key f...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the application of IEEE 802.15.4 in WSN cannot realize adaptive adjustment of superframe period and cluster head rotation, resulting in poor applicability in large-scale, high-density, and randomly distributed scenarios of nodes. A self-adaptive media access control method using superframes in a clustered WSN to realize the dynamics, self-organization, and peering of nodes in the network, and to meet the needs of high density and low power consumption in WSNs

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