A Node Selection Method for Wireless Multimedia Sensor Networks Based on Spatial Mapping Correlation

Abstract

A method for compressing wireless multi-media sensor network images based on space mapping is used in a wireless multi-media sensor network environment and solves the problems that power source energy, the communication capability and the capabilities of calculation and storage of the wireless multi-media sensor network nodes are limited by means of the technology of multi-node cooperative image collection and compression based on related space mapping. According to the method, a cooperative type processing method is applied, and an analysis framework which is based on entropy is established so as to evaluate the joint function of a plurality of related multi-media sensor nodes. Meanwhile, factors such as correlation among the multi-media sensor nodes, the node communication distance and node energy are comprehensively considered, and therefore the optimal selection of the nodes can be achieved. A new space correlation function is designed to describe the correlated characteristics of images which are observed form an overlapping view of the multi-media sensor nodes. A method of hierarchical clustering is adopted to calculate the combination entropy of the multi-media sensor nodes.

Description

technical field [0001] The present invention is a node selection scheme suitable for Wireless Multi-media Sensor Networks (WMSNs for short), the scheme is based on the principle of spatial mapping, and realizes multi-node by eliminating the spatial information redundancy of data between nodes Collaborative image data acquisition to solve the problem of energy and storage constraints of wireless multimedia sensor network nodes, and lay the foundation for efficient transmission of wireless multimedia sensor network data. The technology belongs to the field of computer network. Background technique [0002] With the rapid development and maturity of communication technology, embedded computing technology and sensor technology, miniature sensors with perception, computing and communication capabilities have begun to appear and have attracted great attention. At present, an important direction of sensor network research is how to realize simple environmental data collection, tra...

AI Technical Summary

Problems solved by technology

However, the wireless transmission medium is a broadcast medium, and the bandwidth resources of a node are not only affected by one-hop neighbor nodes and two-hop neighbor nodes, but also by the changes in the traffic of these nodes themselves, and the bandwidth of multimedia sensor networks is very limited. Therefore, how to make reasonable use of the limited bandwidth is the key issue of multimedia synchronization.

(2) The problem of collaborative work of data collection nodes: In wireless multimedia sensor networks, due to the complexity of the task, when completing a data collection task, multiple nodes need to work together, and the control information will be sent from the convergence node, through different The path reaches the destination node of each cooperative work

[0004] Since uncompressed original images require too much bandwidth, it is difficult to be supported by multi-hop wireless networks, so

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