Communication performance of 802.11 WLANs
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A novel media access control algorithm within single cluster in hierarchical ad hoc networks
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The paper presents the performance advantage of Wireless TokenRing Protocol (WTRP) versus IEEE 802.11 in DCF mode.WTRP is a medium access control (MAC) protocol and is designedto provide quality of service in WLANs. WTRP supportsguaranteed QoS in terms of bounded latency and reserved bandwidthwhich are crucial constraints of the real time applicationsand unapplicable in a IEEE 802.11 network. WTRP is a distributedMAC protocol and partial connection is enough for fullconnectivity. The stations take turn to transmit and are forced tosuspend the transmission after having the medium for a specifiedamount of time. WTRP is robust against wireless medium imperfections.The DCF mode of IEEE 802.11, also a distributed MACprotocol, is based on contention among stations and is not homogeneousdue to the existence of hidden terminals and randombehavior. Consequently, QoS is not provided.