Title :
Experiences With a Centralized Scheduling Approach for Performance Management of IEEE 802.11 Wireless LANs
Author :
Hegde, M. ; Kumar, Pranaw ; Vasudev, K.R. ; Sowmya, N.N. ; Anand, S.V.R. ; Kumar, Ajit ; Kuri, Joy
Author_Institution :
Dept. of Electr. Commun. Eng., Indian Inst. of Sci., Bangalore, India
Abstract :
We present a centralized integrated approach for: 1) enhancing the performance of an IEEE 802.11 infrastructure wireless local area network (WLAN), and 2) managing the access link that connects the WLAN to the Internet. Our approach, which is implemented on a standard Linux platform, and which we call ADvanced Wi-fi Internet Service EnhanceR (ADWISER), is an extension of our previous system WLAN Manager (WM). ADWISER addresses several infrastructure WLAN performance anomalies such as mixed-rate inefficiency, unfair medium sharing between simultaneous TCP uploads and downloads, and inefficient utilization of the Internet access bandwidth when Internet transfers compete with LAN-WLAN transfers, etc. The approach is via centralized queueing and scheduling, using a novel, configurable, cascaded packet queueing and scheduling architecture, with an adaptive service rate. In this paper, we describe the design of ADWISER and report results of extensive experimentation conducted on a hybrid testbed consisting of real end-systems and an emulated WLAN on Qualnet. We also present results from a physical testbed consisting of one access point (AP) and a few end-systems.
Keywords :
Internet; Linux; computer network management; quality of service; queueing theory; radio links; scheduling; wireless LAN; ADWISER; IEEE 802.11; Internet access bandwidth; Linux; Qualnet; WLAN manager; access link; access point; adaptive service rate; advanced Wi-Fi Internet service enhancer; cascaded packet queueing; centralized queueing; centralized scheduling approach; end system; performance management; scheduling architecture; wireless LAN; wireless local area network; Downlink; Internet; Quality of service; Servers; Throughput; Wireless LAN; IEEE 802.11 wireless networks; WLAN controllers; WLAN quality-of-service (QoS) management; split-medium acces control (MAC) wireless local area network (WLAN) controllers;
Journal_Title :
Networking, IEEE/ACM Transactions on
DOI :
10.1109/TNET.2012.2207402