Congestion-optimized multi-path streaming of video over ad hoc wireless networks

Congestion–distortion optimized video transmission over ad hoc networks

“…This is done, for example, by recursively extracting the largest flows from the optimal flow assignment solution. Readers are referred to [14] for greater details of the path selection process. Despite the practical limitations in complexity and scalability, congestion-optimized routing is interesting as it offers an upper-bound on the achievable performance.…”

“…The combination of multipath routing with multiple description video coding has often been proposed to improve the error resilliency for video streaming over both the Internet and ad hoc wireless networks [9][10][11]. Multipath routing can also aggregate link rate for a single video stream and hence sustain higher video bit-rates while simultaneously avoiding congestion by load balancing [12][13][14]. In our work, the benefit of multipath routing is attained in terms of a higher supportable video rate, as the route selection and video traffic partitioning are both performed in a congestion-minimized fashion.…”

Minimizing distortion for multi-path video streaming over ad hoc networks

“…When the set of routes is not independent, congestion-optimized traffic partitioning still achieves efficient bandwidth utilization and outperforms heuristics such as load balancing. The benefit of multipath routing observed in [5] is different from the increase in robustness provided by combining path diversity and multiple description coding, which initially motivated multipath video streaming [6].…”

“…[2]. In [5], we analyze the benefits of such schemes for low latency video streaming and focus in particular on optimal traffic partitioning over a set of predetermined paths. This problem has a low complexity convex formulation and can be solved efficiently to the global optimum.…”

“…This is not the case in a wireless ad hoc network, where the action of a single user may affect the overall conditions. The effect of network congestion on streamed video quality has been discussed in our previous work [5], where a congestionminimized multipath routing scheme is proposed to make efficient use of the bandwidth. In this paper, we emphasize the video distortion model, and present additional experimental results which confirm its validity.…”