Novel hybrid wireless-power line video sensor networks with distributed cross-layer optimization

In this paper, we propose a hybrid video sensor network, which comprises both power line nodes and wireless nodes to extend the network lifetime. We formulate the network lifetime maximization problem by considering video encoding rate, aggregate energy consumption, channel access control, and link rate allocation jointly. We develop a fully distributed algorithm which achieves very close performance compared to the centralized algorithm, while saving significant communication overhead required by the centralized algorithm. Numerical results show that the network lifetime is extended by 35% and 42% in the proposed hybrid video sensor network, compared to pure wireless video sensor networks with different network configurations.