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Data compression method of wireless sensor network nodes based on non-threshold

A wireless sensor and network node technology, applied in network topology, wireless communication, network traffic/resource management, etc., can solve the problems of high communication overhead and energy overhead, low information collection efficiency, etc. The effect of high compression precision

Inactive Publication Date: 2010-12-22
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Description
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the above-mentioned existing wireless sensor network node processing method for sending all collected data values ​​to the gateway sink node, resulting in large communication overhead and energy overhead, and low efficiency of information collection, and to provide a wireless network A method for sensor node data compression, thereby reducing communication overhead and energy overhead when wireless sensor network nodes send data, and improving information collection efficiency

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Embodiment Construction

[0039] Below in conjunction with accompanying drawing, the present invention will be further described with specific embodiment:

[0040] Such as figure 1 As shown, it is a non-threshold-based wireless sensor network node data compression method of the present invention. First, the time series data collected by the current node of the wireless sensor network within a certain period of time form a time series data set, expressed as D={d 1 , d 2 , d 3 ,...,d i , d i+1 ,...,d n}, the element d in the set D i Indicates the data collected by the node at the i-th moment, i is 1, 2, ..., n; the wireless sensor network node calculates each element d in the time series data set D i The edge magnitude of , forming the edge magnitude set E(D)={e 1 , e2 , e 3 ,...,e i , e i+1 ,...,e n}, where e i for d i The edge magnitude; the wireless sensor network node calculates each element e in the edge magnitude set E(D) i The set of edge strength W(D)={w 1 ,w 2 ,w 3 ,...,w i ,w ...

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Abstract

The invention relates to the technical field of data compression of wireless sensor network nodes, in particular relating to a data compression method of wireless sensor network nodes based on non-threshold. The method in the invention can perform effective segmental broken line compression on time series data streams collected by the wireless sensor network nodes in a period of time under the premise of ensuring the data compression ratio or data reconstruction precision required by users, thus lowering energy consumption of the sensor nodes and delaying the network life cycle. As the invention is based on the characteristic of the non-threshold, users can perform effective compression on data without possessing any future knowledge about a monitored object, thus being applicable to compression of various time series data with different fluctuation characteristics and being widely used for compression of data of the wireless sensor network nodes needing long-term monitoring.

Description

technical field [0001] The invention relates to a non-threshold-based wireless sensor network node data compression method, and belongs to the technical field of wireless sensor network node data compression methods. Background technique [0002] Wireless sensor network is currently a frontier hot research field that is attracting international attention, involving highly interdisciplinary and highly integrated knowledge. Advances in sensor technology, micro-electromechanical systems, modern networks, and wireless communications have promoted the emergence and development of wireless sensor networks. Wireless sensor networks have expanded people's ability to obtain information and connected physical information in the objective world with transmission networks. In the next-generation network, people will be provided with the most direct, effective and authentic information, which has very broad application prospects and can be widely used in military defense, industrial and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/00H04W28/06H04W84/18
CPCY02B60/50Y02D30/70
Inventor 陈分雄文飞刘俊沈耀东肖万源陈春晖王勇郭红想
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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