A New Qos Aware Relay Node Selection Model For Wireless Mesh NetworksA New Qos Aware Relay Node Selection Model For Wireless Mesh Networks
Liang Liang
Journal of Networking Technology, Vol. 6, No. 2, 2015.
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Abstract:
In Wireless Mesh Networks (WMNs), supporting Quality of Service (QoS) to enable a rich portfolio of
applications/real-time multimedia applications is foreseen to be vital for the success of next generation networking
technologies. However, todayâ€™s cutting edge standards are not perfectly equipped to cater to this task. These standards come
with an inherent complexity and suffer from innate problems with respect to QoS provisioning. Consequently, due to the
limited resource of WMNs and increasingly demand of new applications, there is a need for devising innovative routing
algorithms for supporting QoS on top of the existing standards. Thus, this paper presents a cross layer relay node selection
scheme for routing protocols in order to offer optimal routes to real-time applications. Distinguished from guaranteeing a
certain level of performance, our QoS scheme provides differentiated priorities and service levels to application with different
needs. The scheme includes two parts. In the first part, we present an application priority model to update the application/
priority table from the gateway periodically. Secondly, a new routing metric combining application priority, channel busy
level and hop count, is deployed to evaluate and select the best from plurality possible paths during the communication
phase. Our simulation experiments confirm the superiority of the proposed scheme against a number of existing counterparts.