Interference-minimized multipath routing with congestion control in wireless sensor network for multimedia streaming

Abstract

Multimedia streaming in Wireless Sensor Network (WSN) is required for future military applications to provide high-quality information of hot spots. Recent works have proposed deploying large-scale WSN supported by high-bandwidth backbone network to enable multimedia streaming, but the WSN remains the bottleneck due to the low-rate radios used and the effects of wireless interferences that limit throughput. We propose an Interference-Minimized Multipath Routing (I2MR) scheme that increases throughput by discovering maximally zone-disjoint shortest paths for load balancing, while requiring minimal localization support. Furthermore, we propose a congestion control scheme that reduces long-term path congestions to further increase throughput. We evaluate I2MR with congestion control by comparing with unipath AODV and multipath NDMR. Results show that I2MR with congestion control achieves on average 230% and 150% gains in throughput over AODV and NDMR, and consumes comparable or at most 24% more energy than AODV but up to 60% less energy than NDMR. ©2007 IEEE.