A multi-path transmission algorithm for Layered scalable coding

Wireless Multimedia Sensor Network (WMSN) need to transfer large amounts of video streaming data, how to achieve efficient and reliable transmission becomes a research hotspot. Layered scalable coding techniques can reduce the amount of data to improve channel efficiency. The multi-path transmission technology can balance the network load to fully utilize network resources. This paper presents a multi-path transmission algorithm for Layered scalable coding. First, the source node divides the video source sequence into base layer and enhancement layers through scalable video coding. Second, the energy delay gradient and delay gradient are set up for each sensor node. Last, multiple paths with different service quality are set up according to node gradient, so that it can adapt to the transmission needs of different stream layers. Simulation results show that the algorithm has good bandwidth adaptation and can better meet the business requirements of different users.