Abstract
Delivering multimedia content, requiring high throughput and reduced end-to-end delay, is a hard task in Wireless Sensor Networks, due to the limited bandwidth and energy. Multipath routing is an attractive alternative to remedy to these constraints by allowing bandwidth aggregation to achieve high throughput and load balancing to reduce latency and energy consumption. However, inter-path correlation can throttle concurrent data transfer through different paths. Besides, operating under duty-cycle mode, adopted by many long-term applications, incurs additional challenges due to the intermittent unavailability of nodes. In this context, we propose CFMPR-M, a Correlation-Free MultiPath Routing protocol for multimedia traffic in duty-cycled networks, providing simple mechanisms to construct non-correlated routes towards the sink. It relies on a cross-layer interaction between MAC and routing levels, useful to avoid the drawbacks inherent to duty-cycle mode. Simulation results show the good performance of our protocol in terms of energy consumption, establishment time and control overhead.