VMAC : a speed-aware scalable MAC for vehicular Ad Hoc = VMAC : VANET 환경에서 확장성 있는 속도인식 가능한 MAC에 대한 연구 a speed-aware scalable MAC for vehicular Ad Hoc

The current Medium Access Control (MAC) protocol of the Wireless Access in vehicular ad hoc networks (VANET) is based on IEEE 802.11 Distributed Coordination Function (DCF) and Enhanced Distributed Channel Access (EDCA). Unfortunately, given the high demand for bandwidth, these protocols have drawbacks, one of them is a large number of transmission collisions. Time Division Multiple Access (TDMA) can be an alternative to solve this problem. However, it is not suitable in that it can be problematic because of rapid changes in the vehicular network topology such as highway. In this environment, unused slots result in a waste of bandwidth. In this thesis, we propose a novel hybrid MAC protocol, called Vehicular Medium Access Control (VMAC), for VANET that combines the strengths of CSMA and TDMA while complementing their weak points. Like CSMA, VMAC achieves high channel utilization under low contention by permitting random access and like TDMA, achieves high channel utilization under high contention by allocating time slots and reducing collisions. We evaluate VMAC through extensive NS-2 simulations.
Advisors
Kim, Dae-Youngresearcher김대영researcher
Publisher
한국정보통신대학교
Issue Date
2008
Identifier
393004/225023 / 020064651
Language
eng
Description

학위논문(석사) - 한국정보통신대학교 : 공학부, 2008.6, [ vii, 53 p. ]

Keywords

VANET; MAC; CSMA; 바넷; 맥; TDMA

URI
http://hdl.handle.net/10203/55009
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=393004&flag=t
Appears in Collection
School of Engineering-Theses_Master(공학부 석사논문)
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