Abstract
Wireless mesh networks (WMNs) are a very attractive new field of research. They are low cost, easily deployed, and a high-performance solution to last-mile broadband Internet access. In WMNs, admission control (AC) is one of the key traffic management mechanisms that should be deployed to provide quality of service (QoS) support for real-time traffic. In this paper, we introduce a novel admission control model, based on bandwidth and delay parameters, which integrates a dynamic link scheduling scheme. The proposed model is built on two different methods to access the medium: on a contention-based channel access method for control packets and on a dynamic time division multiple access (DTDMA) for data packets. Each time a new flow is admitted in the network, the WMN’s link scheduling is modified according to the flows’ requirement and network conditions while respecting the signal-to-interference-plus-noise ratio (SINR); this allows establishing collision-free transmissions. Using extensive simulations, we demonstrate that our model achieves high resource utilization by improving throughput, establishing collision-free transmission, as well as respecting requirements of admitted flows in terms of delay and bandwidth.
Highlights
Wireless mesh networks (WMNs) are autonomous networks, made up of mesh routers and mesh clients, where mesh routers have minimal mobility and form the backbone of WMNs
This paper proposes a novel admission control model based on dynamic link scheduling, which integrates bandwidth and delay as parameters
Each element tu(ei)j represents the position of a time unit (TU) in the Transmission scheduling (TS) interval during which node ui such that ei = must send a packet of flow f if it possesses any in its queue
Summary
We introduce a novel admission control model, based on bandwidth and delay parameters, which integrates a dynamic link scheduling scheme. The proposed model is built on two different methods to access the medium: on a contention-based channel access method for control packets and on a dynamic time division multiple access (DTDMA) for data packets. Each time a new flow is admitted in the network, the WMN’s link scheduling is modified according to the flows’ requirement and network conditions while respecting the signal-to-interference-plus-noise ratio (SINR); this allows establishing collision-free transmissions
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More From: EURASIP Journal on Wireless Communications and Networking
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