Mobile terminal assisted wireless sensor network information acquisition method

Abstract

The invention discloses a method for acquiring information of a wireless sensor network assisted by a mobile terminal. The network of the invention works in a fixed-and-mobile mixed mode. A data acquisition mode is either reporting at regular time or referring according to requirement. One or a plurality of fixed sink nodes are in the network, which are responsible for interest distribution, information acquisition and access into an upper-level network. All sensor nodes are maintained to the reliable transmission routes of the fixed sink nodes. When sensor nodes have data needing to be reported: if no mobile terminal exists in the network, the data is transmitted to the fixed sink nodes by multi-hopping; if one to a plurality of mobile terminals exist in the network, the sensor nodes transmit the data to the nearest mobile terminal or the fixed sink nodes by multi-hopping. The mobile terminals only diffuse the location updating thereof to the nodes within a small range close to the mobile terminals. The sensor nodes receiving the location updating information from the mobile terminals are maintained to the routes of the mobile terminals. The method of the invention can solve the current communication bottleneck problem near the sink nodes of the large-scale fixed sensor network by utilizing the existing commercial high-speed mobile network in an auxiliary way, improve the capacity of the network, prolong the survival time of the network and reduce information acquisition delay. The method of the invention has relatively high reliability, flexibility and expandability.

Description

technical field [0001] The invention relates to a solution method for wireless sensor network information acquisition. It belongs to the intersection field of wireless sensor network and traditional mobile communication technology. Background technique [0002] In recent years, with the development of microelectronics technology, wireless communication technology and MEMS technology, the design and application of low-power sensor nodes integrating environmental perception and wireless communication functions have become a reality. The resulting wireless sensor network has great application prospects in military, medical, public safety, environmental monitoring, etc., and has gradually become a hot spot in the research of wireless ad hoc networks after Ad Hoc networks. Compared with the traditional Internet and AdHoc network, the wireless sensor network is very different, mainly reflected in: the computing power of a single node is limited, the storage capacity is limited, t...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the existing problems of difficult improvement of network throughput, information acquisition delay and short network survival time existing in fixed sensor networks

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