Browse > Article

A Priority-based MAC Protocol to Support QoS in Ad-hoc Networks  

Wang, Weidong (인하대학교 정보통신대학원 멀티미디어통신망연구실)
Seo, Chang-Keun (인하대학교 정보통신대학원 멀티미디어통신망연구실)
Yoo, Sang-Jo (인하대학교 정보통신대학원 멀티미디어통신망연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.30, no.2A, 2005 , pp. 80-89 More about this Journal
Abstract
In IEEE 802.11 and 802.11e for ad hoc networks, DCF and EDCA use a contention-based protocol called CSMA/CA, which is simple to implement efficient when the system is light loaded. But the performance of CSMA/CA decreases dramatically when the system load is heavy because of increasing collisions. In PCF and HCF modes, stations are controlled by a base station by polling, no collision ever occurs. However, when the system load is light, the performance is poor because few stations have data to transfer. More important, PCF and HCF can not be used in the ad hoc networks. In this paper, we address a priority-based distributed polling mechanism (PDPM) that implements polling scheme into DCF or EDCA modes for ad hoc networks by adding a polling approach before every contention-based procedure. PDPM takes the advantages of polling mechanism that avoids most of collisions in a high load condition. At the same time, it also keeps the contention-based mechanism for a light loaded condition. PDPM provides quality of service (QoS) with fewer collisions and higher throughput compared with IEEE 802.11e.
Keywords
Ad-hoc networks; Medium Access Control; QoS; Distributed polling;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Kanghee Kim, Aftab Ahmad, Kiseon Kim, 'A wireless multimedia LAN architecture using DCF with shortened contention window for CPS provisioning', IEEE Communications Letters, Vol. 7, No.2, pp. 97-99, Feb 2003   DOI   ScienceOn
2 Qiang Ni, Imad Aad, Chadi Barakat, and Thierry Turletti. 'Modeling and Analysis of Slow CW Decrease for IEEE 802.11 WLAN', IEEE PIMRC'2003, pp.1717-1721, 2003
3 Sunghyun Choi, 'Overview of Emerging IEEE 802.11 Protocols for MAC and Above', Telecommunications Review, Special Edition, pp. 102-127, 2003
4 IEEE 802.11 WG, IEEE 802.11e/D6.0, 'Draft Amendment to Standard for Information Technology - Telecommunications and Information Exchange Between Systems LAN/MAN Specific Requirements - Part 11 : Wireless Medium Access Control(MAC) and Physical Layer(PHY) Specifications : Medium Access Control(MAC) Quality of Service(QoS) Enhancements', Nov. 2003
5 IEEE Std 802.11, 'Information technology Telecommunications and information exchange between systems - Local and metropolitan area networks - Specific requirements - Part 11 Wireless LAN Medium Access Control (MAC) and Physical Layer (PRY) specifications', 1997
6 Shou-Chih La, Guanling Lee, and Wen-Tsuen Chen. 'An Efficient Multipolling Mechanism for IEEE 802.11 Wireless LANs', IEEE Transactions on Computers, Special Issue on Wireless Internet, Vol. 52, No.6, pp. 764-778, June 2003
7 Joao L. Sobrinho, and A. S. Krishnakumar. 'Quality-of-Service in Ad Hoc Carrier Sense Multiple Access Wireless Network', IEEE journal on Selected Areas in Communications, Vol.17, No.8, pp.1353 - 1368, 1999   DOI   ScienceOn
8 TKN, Design and verification of an IEEE 802. 11e EDCF simulation model in ns-2.26, Berlin, Nov. 2003
9 The Network Simulator - ns2, http://www.isi.edu/nsman/ns
10 Antonio Grilo, Mario Macedo, Mario S. Nunes, 'IP QoS support in IEEE 802.11b WLANs', Computer Communications 26(17), pp. 1918-1930, 2003   DOI   ScienceOn
11 Chih-Min Chao, Jang-Ping Sheu, and I-Cheng Chou, 'A Load Awareness Medium Access Control Protocol for Wireless Ad Hoc Network', IEEE ICC'2003, pp.438-442, 2003