A Cross-layer and Multipath based Video Transmission Scheme for Wireless Multimedia Sensor Networks
The issue of video transmission for wireless multimedia sensor networks (WMSNs) was studied in this paper. Video applications were generally characterized by large data size and strong real-time requirement. However, nodes in WMSNs had limited resources and the quality of service for video applications was hard to ensure. This paper studied this problem and presented a cross-layer and multipath based video transmission scheme (CMVT). CMVT introduced the idea of differentiated service and multipath routing, and operated in both application layer and network layer. In application layer, different types of video frames were marked with different tags. Then in network layer these frames were identified by the tags and CMVT would forward them in different paths. Simulation results showed that, CMVT reduced the channel conflicts efficiently and balanced the power consumption of the network, which extended the network lifetime greatly. Also, it provided better video transmission quality.