Power efficient routing algorithm for 3D video transmission in bandwidth-limited and radio-limited wireless networks

Abstract

3D transmission is a new and challenging research issue in wireless network. Basically, 3D video stream is composed of multiple 2D video streams to create 3D viewing experience at the receiver. As compared to the 2D video stream, 3D video stream requires significant bandwidth requirements. However, in wireless networks, due to the limited frequency spectrum, it is difficult to transmit the full 3D video stream in one channel. One solution is to traffic bifurcation. By bifurcating the 3D video into multiple 2D video streams and transmitting each 2D video stream in separate routing path. Then the 3D video could be combined and reconstructed at the destination node. However, with this traffic bifurcation scheme, the relay nodes on different routing path might need to cooperate on the modulation scheme and transmission power so that the destination node could get the same video quality to successfully reconstruct the 3D video. In addition, with this traffic bifurcation scheme, the routing decision needs to consider the radio resource on each node because each node on the routing paths might transmit/receive multiple 2D video streams. Besides frequency spectrum and radio resource, another key performance measure is power consumption due to most of the nodes are battery driven in wireless networks. This problem is a challenging cross-layer design problem that includes the SNR-aware power control in the physical layer, cooperative routing in the network layer and video quality aware in the application layer to deliver the 3D video in power efficient way without violating the frequency spectrum and radio resource constraint. I propose a novel IVIP heuristic to tackle this problem. According to the computational experiments, the proposed IVIP heuristic outperforms other heuristics under all tested cases.