Data Acquisition and Transmission Reliability for Wireless Image Sensor Networks

Wireless image sensor networks acquire and transmit image data through self-organized method. Considering processing ability, energy consumption and cost, this paper implements a practical image sensor node with low-power sleeping mechanism in order to achieve image data´s gathering, processing and transmission. To ensure transmission reliability of image data in wireless channel, this paper improves the weakness of retransmission mechanism in traditional Zigbee protocol, and proposes an efficient Zigbee-based retransmission and acknowledgment mechanism. Experimental results show the relationships among the total retransmission time, packet loss rate and the maximum number of retransmission.