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Title: A load awareness medium access control protocol for single-hop wireless ad hoc networks
Authors: Chih-Min Chao;Jang-Ping Sheu;I-Cheng Chou
Contributors: NTOU:Department of Computer Science and Engineering
Keywords: Ad hoc networks;CSMA/CA;medium access control;token passing;wireless communications
Date: 2008-05
Issue Date: 2011-10-21T02:33:55Z
Publisher: Wireless Communications and Mobile Computing
Abstract: Abstract:A contention-based wireless ad hoc medium access control (MAC) protocol, such as carrier sense multiple access with collision avoidance (CSMA/CA), has excellent efficiency when the system is light-loaded. The main drawback of such protocols is their inefficiency and unbounded delay when the system load is heavy. On the other hand, a contention-free MAC protocol, such as token passing, has a better and fair throughput when the system is heavy-loaded. The main drawback of such protocols is their inefficiency when only a small amount of users want to transmit. In this paper, we propose a new load awareness single-hop wireless ad hoc MAC protocol (which is called the $LA$ protocol) that exploits the benefits of both contention-based and contention-free protocols. A contention-based MAC protocol is used when the system is light-loaded and a contention-free one is used otherwise. Our $LA$ protocol, which operates in a distributed fashion and is fully compatible with the IEEE 802.11 wireless local area network (WLAN) standard, can switch smoothly between the contention-based protocol and the contention-free one. Simulation results show that our protocol indeed extracts the better part of two kinds of protocols.
Relation: 8(4), pp.449-462
Appears in Collections:[Department of Computer Science and Engineering] Periodical Articles

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