Resource-aware video multicasting via access gateways in wireless mesh networks

Abstract

Abstract-This paper studies video multicasting in large scale areas using wireless mesh networks. The focus is on the use of Internet access gateways that allow a choice of alternative routes to avoid potentially lengthy multi-hop wireless paths with low capacity. A set of heuristic-based algorithms are described that together aim to maximize network capacity: the two-tier integrated architecture algorithm, the weighted gateway uploading algorithm, the link-controlled routing tree algorithm, and the alternative channel assignment algorithm. These algorithms use different approaches to arrange multicast group members into a clustered and two-tier integrated architecture in which network protocols can make use of multiple gateways to improve system throughput. Simulation results are used to determine the performance of the different approaches.

Cross-layer optimisation for topology design of wireless multicast networks via network coding

“…Proof: From (1), it can be seen that the system throughput function is linear over multicast rate variables of wireless multicast requirements R m , m ∈ M. With fixed topology tree and fixed T n , n ∈ N , we can easily prove that the constraints (2), (3), (4), (5), (6) and (7) Without linear NC technique, the wireless link utilisation and node energy constraints can be given by…”

Multi-Source Video Multicast in Internet-Connected Wireless Mesh Networks

“…In this section, we use RAM [11] as an example to briefly illustrate the terminology of integrated multicast. We then explain how the state-of-art is inappropriate for multi-source multicast.…”

“…The selection of "closest" gateways purely depends on topology, failing to consider the tradeoff between the selection of a closer but more congested gateway vs. the use of a farther, less utilized gateway. Therefore, in [10][11], the resource-aware video multicast framework (RAM) makes judicious use of gateway resources to efficiently combine available Internet resources and intra-WMN bandwidth. RAM provides an efficient solution for large-scale single-source video multicast.…”

“…In general, WMN nodes use Internet shortcuts either naively through their closest gateways (e.g., [9]) or by a planned structure that is designed with consideration for gateway conditions and Internet accessibility (e.g., [10][11]). The structure approach performs better with respect to communication scalability because the employment of intramesh routes or integrated routes takes network conditions and WMN node locations into account.…”

GREENIE: a novel hybrid routing protocol for efficient video streaming over wireless mesh networks

“…Some recent studies such as [41,54] have employed the existing gateways in WMNs to transfer some of the video frames generated by the wireless nodes to the wired gateway links. The main idea behind these studies is that the data transmission through the gateways and the existing internet connection provides higher video quality with lower end-to-end delay due to employing high capacity bandwidth over the Internet in comparison with wireless network.…”