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


Vol. 30,  No. 2, pp. 80-89, Feb.  2005


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  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.

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  Cite this article

[IEEE Style]

W. Wang, C. Seo, S. Yoo, "A Priority-based MAC Protocol to Support QoS in Ad-hoc Networks," The Journal of Korean Institute of Communications and Information Sciences, vol. 30, no. 2, pp. 80-89, 2005. DOI: .

[ACM Style]

Weidong Wang, Chang-Keun Seo, and Sang-Jo Yoo. 2005. A Priority-based MAC Protocol to Support QoS in Ad-hoc Networks. The Journal of Korean Institute of Communications and Information Sciences, 30, 2, (2005), 80-89. DOI: .

[KICS Style]

Weidong Wang, Chang-Keun Seo, Sang-Jo Yoo, "A Priority-based MAC Protocol to Support QoS in Ad-hoc Networks," The Journal of Korean Institute of Communications and Information Sciences, vol. 30, no. 2, pp. 80-89, 2. 2005.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880