Divert
- 6 June 2004
- proceedings article
- Published by Association for Computing Machinery (ACM)
- p. 203-216
- https://doi.org/10.1145/990064.990090
Abstract
The performance of Wireless Local Area Networks (WLANs)often suffers from link-layer frame losses caused by noise, interference, multipath, attenuation, and user mobility. We observe that frame losses often occur in bursts and that three of the five main causes of frame losses -- multipath, attenuation, mobility--depends on the transmission path traversed between an access point (AP)and a client station.In a typical WLAN deployment, different transmission paths to a client exist in places where overlapping coverage is provided by a set of neighboring APs. Using experimental measurements and analysis on a 802.11b testbed, we show that fine-grained path selection among a set of neighboring APs can significantly reduce path-dependent losses in WLANs.We design and implement a WLAN distribution system called Divert, which supports fine-grained path selection for downlink communications, on an 802.11b testbed. Divert reduces frame losses without consuming any extra bandwidth in the wireless medium. Our experimental results show that Divert can reduce frame loss rates in realistic scenarios by as much as 26% compared to a fixed-path scheme that uses the best available transmitter.Keywords
This publication has 14 references indexed in Scilit:
- MARPublished by Association for Computing Machinery (ACM) ,2004
- Improving the latency of 802.11 hand-offs using neighbor graphsPublished by Association for Computing Machinery (ACM) ,2004
- DIRACPublished by Association for Computing Machinery (ACM) ,2003
- Handover and macro diversity for 3rd generation mobile systems within ATM fixed networksPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Fragment adaptive reduction: coping with various interferers in radio unlicensed bandsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Opportunistic media access for multirate ad hoc networksPublished by Association for Computing Machinery (ACM) ,2002
- A rate-adaptive MAC protocol for multi-Hop wireless networksPublished by Association for Computing Machinery (ACM) ,2001
- Reduced cell switching in a mobile computing environmentPublished by Association for Computing Machinery (ACM) ,2000
- Measurement and analysis of the error characteristics of an in-building wireless networkPublished by Association for Computing Machinery (ACM) ,1996
- A wireless local area network employing distributed radio bridgesWireless Networks, 1996