Delay Constrainted-Rate Allocation for SVC over Device-to-Device Networks

Device-to-Device (D2D) multicast content sharing is becoming a promising technology to alleviate video traffic overload and can improve the quality of local area services. Whereas existing studies mainly focus on the delay or throughput performance. However, for delay sensitive real-time video traffic, throughput as an indicator of the network-layer cannot properly indicate the benefits of upper-layer applications. Thus, in this paper we propose a video multicast scheme for D2D cooperative scalable video coding (SVC) streaming distribution to cope with the difference between multicast channels firstly. Then, we have provided analytical expressions of the goodput in heterogeneous multicast networks based on D2D collaboration, and a distributed heuristic algorithm is proposed to solve this NP-hard optimization problem. Our results show that the proposed scheme can effectively reduce end-to-end delay, effective loss rate and improve the goodput in the system.