Cross timeslot allocation method for wireless sensor network

Abstract

The invention discloses a cross timeslot allocation method for a wireless sensor network, comprising the following steps of: (1) a cross timeslot allocation algorithm based on a fixed time frame length, (2) a clock drifting influence offset method based on sending jitter and propagation delay protection and (3) a cross timeslot block allocation method based on service grade weighing. The invention can overcome the defects of a time scheduling MAC (Media Access Control) protocol based timeslot dividing method of the traditional wireless sensor network, solves the problems of real-time transmission of periodic event perception and event-driven perception data during the application of the wireless sensor network, access fairness of a node channel of a heterogeneous sensor, different QoS (Quality of Service) demands of different service grades of the heterogeneous sensor, and the like, provides the technical support for the wireless sensor network to be applied to a multiplex event monitoring environment and has higher practical value.

Description

technical field [0001] The invention relates to a cross time slot allocation method for a wireless sensor network. It belongs to the technical field of wireless sensor networks. Background technique [0002] As the interface between the real world and the digital world, wireless sensor networks have very broad application prospects in the fields of military, industrial and agricultural production, urban management, digital buildings, environmental monitoring, emergency rescue and disaster relief. [0003] The MAC protocol is one of the key network protocols to ensure efficient communication in wireless sensor networks. It determines the use of wireless channels, allocates limited wireless channel resources among sensor nodes, and is used to build the underlying infrastructure of wireless sensor network systems. The performance of the sensor network has a very important impact. The time-scheduled MAC protocol is widely used because it facilitates the realization of data fus...

AI Technical Summary

Problems solved by technology

[0004] The time slot division method adopted by the existing time-scheduling-based MAC protocol has the following common problems: it cannot guarantee the real-time transmission of data in periodic event sensing and event-driven sensing applications at the same time; it cannot guarantee the channel usage fairness of heterogeneous sensor nodes; Unable to meet the QoS requirements of different service levels of heterogeneous sensors

These problems lead to the fact that the existing MAC protocols based on time scheduling cannot meet the application requirements of heterogeneous sensor networks in multi-event monitoring environments.

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