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Heterogeneous wireless sensor network life prolonging method based on dormancy mechanism

A wireless sensor and network lifetime technology, applied in data exchange networks, transmission systems, digital transmission systems, etc., can solve the problems of limited processing capacity, wireless bandwidth and current capacity of wireless sensor nodes, and achieve extended lifespan, extended stability period, Increase the effect of the sleep mechanism

Inactive Publication Date: 2008-10-15
NANCHANG UNIV
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AI Technical Summary

Problems solved by technology

Due to the limitation of cost and volume, the processing power, wireless bandwidth and current capacity of wireless sensor nodes are very limited.

Method used

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  • Heterogeneous wireless sensor network life prolonging method based on dormancy mechanism
  • Heterogeneous wireless sensor network life prolonging method based on dormancy mechanism
  • Heterogeneous wireless sensor network life prolonging method based on dormancy mechanism

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Embodiment Construction

[0009] The specific implementation method steps of the present invention are as follows:

[0010] 1. T cluster stage

[0011] cluster formation stage T cluster , subdivided into two small stages of cluster head formation and cluster division.

[0012] Assuming that N sensor nodes are randomly and evenly distributed in a M×M two-dimensional square area A, and the SINK node is located in the center, each time the cluster head receives l-bit information from each node in the cluster, it The data is aggregated into l-bit information, and then sent to the SINK node.

[0013] The optimal number of cluster heads for each network can be obtained by the formula

[0014] k opt = n 2 π M d toBS = n 2 π ...

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Abstract

The invention relates to a method for prolonging service life of a heterogeneous wireless sensor network based on a dormancy mechanism. After being laid, the wireless sensor network starts to work by cycle, with each cycle being divided into three stages: a cluster forming stage (Tcluster), a cluster dormancy and activity stage (Tschedule) and a stage for cluster active nodes to transmit and monitor data (Tdata). The advantages of the method of the invention are that: as the redundancy of the nodes is taken into consideration and the dormancy mechanism is adopted, the stable cycle of the wireless sensor network is prolonged by about 30 percent compared with that of SEP, that is, the service life of the wireless sensor network is prolonged by 30 percent.

Description

technical field [0001] The invention relates to a method for prolonging the service life of a heterogeneous wireless sensor network based on a sleep mechanism. Background technique [0002] Wireless sensor networks (WSNs: Wireless Sensor Networks) are composed of a large number of cheap sensor nodes deployed in the monitoring area, and form a multi-hop self-organizing network system through wireless communication. Information about perceived objects in the network overlay and sent to relevant observers. Wireless sensor networks have broad application prospects in the fields of environmental monitoring, military reconnaissance, emergency rescue, medical care, space and underwater detection. Due to the limitation of cost and volume, the processing power, wireless bandwidth and current capacity of wireless sensor nodes are very limited. The energy of wireless sensor network nodes cannot be replenished in most cases, so prolonging the working life of wireless sensor network as...

Claims

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Application Information

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IPC IPC(8): H04L12/28H04L12/24
Inventor 龙承志陈卉李立宏罗建平
Owner NANCHANG UNIV
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