A Low Energy Consumption Channel Scanning Method for Wireless Multimedia Sensor Networks

Abstract

The invention discloses a low-energy consumption channel scanning method of a wireless multimedia sensor network. The low-energy consumption channel scanning method comprises the steps that: a terminal node and a route node firstly judge whether optimal channels used previously are optimal currently; if the optimal channels used previously are not optimal, the terminal node selects two channels numerically closest to the optimal channel used previously by the terminal node from optimal channels of other terminal nodes; the route node selects two channels numerically closest to the optimal channel used previously by the route node from optimal channels of other route nodes having the same ancestor node with the route node; and a channel with minimal channel energy is selected through scanning channels between two selected channels. For the wireless multimedia sensor network adopting multiple channels, the terminal node and the route node do not scan all channels in a channel space any more when determining the optimal channels, and only a few channels are required to be scanned, thus the energy consumption of network nodes can be effectively reduced, the transport delay of multimedia data is reduced, the utilization efficiency of energy consumption used by scanning the channels by the network nodes is increased, and further the service life of the network nodes is prolonged.

Description

Technical field [0001] The invention relates to a channel scanning method for a wireless multimedia sensor network with low energy consumption, and more specifically, to a channel selection method for a wireless multimedia sensor network. Background technique [0002] The wireless multimedia sensor network is a technical branch of the traditional wireless sensor network. It is a wireless communication network technology that should be generated in response to the actual demand for collecting and transmitting multimedia data such as audio and video in the wireless sensor network. Wireless terminal nodes connected to microphones or cameras are discretely and distributedly deployed in places that need to be monitored. The monitored audio and video data streams are transmitted to the central node in a wireless, multi-hop manner, so as to realize the collection and collection of multimedia data in the monitoring place. The purpose of wireless transmission. [0003] Since the wireless m...

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Problems solved by technology

[0005] However, all these methods are only aimed at fast switching of wireless channels, aiming at improving the QoS of the network, and have not considered the energy consumed by the mobile station during the scanning process of the wireless channel, and have not studied how the mobile station scans the wireless channel. Improve the utilization efficiency of limited energy, so it is not suitable for the use of wireless multimedia sensor networks

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