Double sense multiple access for wireless ad hoc networks

Authors:
Yang Yang;Feiyi Huang;Xiaohu Ge;Xiaodong Zhang;Xuanye Gu;Mohsen Guizani;Hsiao-Hwa Chen
Affiliations:
Department of Electronic and Electrical Engineering, University College London, United Kingdom;Department of Electronic and Electrical Engineering, University College London, United Kingdom;Huazhong University of Science and Technology, China;Shanghai Research Center for Wireless Communications, China;Mobility Research Center, British Telecommunications, United Kingdom;Department of Computer Science, Western Michigan University, United States;Institute of Communications Engineering, National Sun Yat-Sen University, Taiwan, ROC
Venue:
Computer Networks: The International Journal of Computer and Telecommunications Networking
Year:
2007

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Abstract

In wireless ad hoc networks, the major quality of service (QoS) concern and challenge in the design and analysis of contention-based medium access control (MAC) protocols is to achieve good throughput and access delay performance in the presence of hidden terminals, which are defined as the terminals out of the radio coverage area of an intended transmitter but within that of the receiver. We propose and analyze in this paper a new dual-channel random access protocol, called ''Double Sense Multiple Access'' (DSMA), for improving QoS support in wireless ad hoc networks. By separating the transmissions of ready-to-send (RTS) and data packets into two time-slotted channels and by introducing a novel double sense mechanism, DSMA completely solves the hidden terminal problem and can guarantee the success transmission of data packets. By taking into account the most complex network scenario in which all transmitters are hidden terminals with respect to each other, key QoS metrics such as throughput, blocking probability and access delay are derived mathematically for the proposed DSMA protocol. These analytical results are verified by extensive computer simulations.