Rate Allocation for SVC Transmission in Energy-Constrained Wireless Sensor Networks
Due to the resource limitations, efficient multimedia transmission is still a challenging problem in Wireless Sensor Networks (WSNs). To achieve this goal, provisioning the required rate and quality of video stream along with limitations of sensor nodes should be considered. The Scalable Video Coding (SVC) is an efficient approach to support the graceful quality reduction and scalability of multimedia application thus, the authors adopt it to encode video streams. In this paper, both Network Utility Maximization (NUM) and utility proportional optimization for scalable multimedia transmission in WSNs are addressed. Link congestion and energy scarcity of sensor nodes are considered as the constraints in optimization problems.