DocumentCode :
765358
Title :
Dual busy tone multiple access (DBTMA)-a multiple access control scheme for ad hoc networks
Author :
Haas, Zygmunt J. ; Deng, Jing
Author_Institution :
Sch. of Electr. & Comput. Eng., Cornell Univ., Ithaca, NY, USA
Volume :
50
Issue :
6
fYear :
2002
fDate :
6/1/2002 12:00:00 AM
Firstpage :
975
Lastpage :
985
Abstract :
In ad hoc networks, the hidden- and the exposed-terminal problems can severely reduce the network capacity on the MAC layer. To address these problems, the ready-to-send and clear-to-send (RTS/CTS) dialogue has been proposed in the literature. However, MAC schemes using only the RTS/CTS dialogue cannot completely solve the hidden and the exposed terminal problems, as pure "packet sensing" MAC schemes are not safe even in fully connected networks. We propose a new MAC protocol, termed the dual busy tone multiple access (DBTMA) scheme. The operation of the DBTMA protocol is based on the RTS packet and two narrow-bandwidth, out-of-band busy tones. With the use of the RTS packet and the receive busy tone, which is set up by the receiver, our scheme completely solves the hidden- and the exposed-terminal problems. The busy tone, which is set up by the transmitter, provides protection for the RTS packets, increasing the probability of successful RTS reception and, consequently, increasing the throughput. This paper outlines the operation rules of the DBTMA scheme and analyzes its performance. Simulation results are also provided to support the analytical results. It is concluded that the DBTMA protocol is superior to other schemes that rely on the RTS/CTS dialogue on a single channel or to those that rely on a single busy tone. As a point of reference, the DBTMA scheme out-performs FAMA-NCS by 20-40% in our simulations using the network topologies borrowed from the FAMA-NCS paper. In an ad hoc network with a large coverage area, DBTMA achieves performance gain of 140% over FAMA-NCS and performance gain of 20% over RI-BTMA
Keywords :
access protocols; land mobile radio; network topology; packet radio networks; DBTMA; DBTMA protocol; FAMA-NCS; MAC layer; MAC protocol; RTS packet; RTS/CTS dialogue; ad hoc networks; clear-to-send dialogue; dual busy tone multiple access; exposed terminal problems; hidden terminal problems; multiple access control; narrow-bandwidth tones; network capacity; network topologies; out-of-band busy tones; packet sensing MAC schemes; performance evaluation; ready-to-send dialogue; simulation results; throughput; Access control; Access protocols; Ad hoc networks; Analytical models; Media Access Protocol; Performance analysis; Performance gain; Protection; Throughput; Transmitters;
fLanguage :
English
Journal_Title :
Communications, IEEE Transactions on
Publisher :
ieee
ISSN :
0090-6778
Type :
jour
DOI :
10.1109/TCOMM.2002.1010617
Filename :
1010617
Link To Document :
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