Title :
A Distributed QoS MAC Protocol for Wireless Mesh
Author :
Benveniste, Mathilde
Author_Institution :
Avaya Labs. - Res., Basking Ridge, NJ
Abstract :
Abundant hidden node collisions and correlated channel access due to multi-hop flows degrade QoS in wireless mesh networks. QoS in nearby WLANs operating on a single channel is also affected. We propose using wider contention windows for backoff to lower the risk of repeated hidden-node collisions, a spatial extension of the TXOP concept called ´express forwarding´ to clear multi-hop flows sooner, and a new mechanism called ´express re-transmission´ to reduce collisions on retransmission. Simulation results show the potential benefit of the proposed enhancements and impact on fairness.
Keywords :
access protocols; quality of service; wireless LAN; wireless channels; WLAN; channel access; contention windows; distributed QoS MAC protocol; express forwarding; express retransmission; hidden node collisions; multihop flows; quality of service; spatial extension; wireless local area networks; wireless mesh networks; Access protocols; Delay; Media Access Protocol; Peer to peer computing; Telecommunication traffic; Wireless LAN; Wireless application protocol; Wireless mesh networks; Wireless networks; Wireless sensor networks; IEEE 802.11s; MAC; QoS; WLAN; WiFi; mesh; wireless;
Conference_Titel :
Sensor Technologies and Applications, 2008. SENSORCOMM '08. Second International Conference on
Conference_Location :
Cap Esterel
Print_ISBN :
978-0-7695-3330-8
Electronic_ISBN :
978-0-7695-3330-8
DOI :
10.1109/SENSORCOMM.2008.110
