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Abstract MACAW: A Media Access Protocol for Wireless LAN's

By Vaduvur Bharghavan


In recent years, a wide variety of mobile computing devices has emerged, including portables, palmtops, and personal digital assistants. Providing adequate network connectivity for these devices will require a new generation of wireless LAN technology. In this paper we study media access protocols for a single channel wireless LAN being developed at Xerox Corporation's Palo Alto Research Center. We start with the MACA media access protocol rst proposed by Karn [9] and later re ned by Biba [3] which uses an RTS-CTS-DATA packet exchange and binary exponential backo. Using packet-level simulations, we examine various performance and design issues in such protocols. Our analysis leads to a new protocol, MACAW, which usesanRTS-CTS-DS-DATA-ACK message exchange and includes a signi-cantly di erent backo algorithm.

Year: 2008
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