A generic controller for managing TCP transfers in IEEE 802.11 infrastructure WLANs. (1st September 2017)

• Record Type: Journal Article
• Authors: Sunny, Albert; Panchal, Sumankumar; Vidhani, Nikhil; Krishnasamy, Subhashini; Anand, S.V.R.; Hegde, Malati; Kuri, Joy; Kumar, Anurag
• Is Part Of: Journal of network and computer applications. Volume 93(2017)
• Page Start: 13
• Page End: 26
• Publication Date: 2017-09-01
• Subjects: QoS management -- Centralized fair queuing scheduler -- 802.11 WLANs -- Coarse Time-sicing; Microcomputers -- Periodicals; Computer networks -- Periodicals; Application software -- Periodicals; Micro-ordinateurs -- Périodiques; Réseaux d'ordinateurs -- Périodiques; Logiciels d'application -- Périodiques; Application software; Computer networks; Microcomputers; Periodicals; 004.05; 004
• DOI: 10.1016/j.jnca.2017.05.006
• Languages: English
• ISSNs: 1084-8045

Abstract

Abstract: In this paper, we present a generic controller that ensures fair and efficient operation of IEEE 802.11 infrastructure wireless local area networks (WLANs) with multiple co-channel access points. Our controller addresses performance issues of long-lived TCP transfers in multi-AP WLANs, by overlaying a coarse time-slicing scheduler on top of a cascaded fair queuing scheduler. The time slices and queue weights, used in our controller, are obtained from the solution of a constrained utility optimization formulation. A study of the impact of coarse time-slicing on TCP is also presented in this paper. We also present a methodology to improve the performance of co-existing short-lived and interactive TCP flows. Finally, we report the results of experiments performed on a real testbed, demonstrating the efficacy of our controller.