Live Content Distribution Service in Wireless Mesh Networks with Minimal Interference
Date Issued
2009
Date
2009
Author(s)
Yu, Shih-Chieh
Abstract
In this thesis, we study the problem of how to support live multimedia content broadcasting in wireless mesh networks. Traditional approach of exploiting spatial channel reuse to improve network performance for wireless networks only considers unicast communication. In content multicasting/broadcasting service, a transmission instance may have more than one receiver. A cross-layer design of a minimal-interference content distribution architecture and associated routing and scheduling algorithms are proposed to a) provide end-to-end QoS-guaranteed live content distribution; b) achieve efficient network multicast/broadcast throughput capacity by combined spatial channel reuse and scheduling; and c) support QoS-guaranteed handoff to address the dynamic mobile subscriber behavior in the wireless mesh network. Three mechanisms are proposed to construct individual minimal-interference shortest-paths from the Internet gateway node to each anchor backbone node such that every mesh node is one-hop from the distribution backbone. A time division-based scheduling algorithm is then proposed to arrange channel access of the wireless links on the distribution backbone to guarantee live content delivery. Under the algorithm, only a small number of time slots are needed and it remains quite stable when the network size increases. The simulation results show that this architecture and algorithms indeed maximize the overall network bandwidth use and meet real-time delay performance of live content distribution to provide service users with excellent viewing experience. The architecture also well supports incremental network expansion and scalability.
Subjects
wireless mesh networks
live content distribution
wireless QoS
overlay network
multimedia communication
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