NDLI: Bit Error Correction without Redundant Data: a MAC Layer Technique for 802.11 Networks

Content Provider	IEEE Xplore Digital Library
Author	Wenyu Jiang
Copyright Year	2006
Description	Author affiliation: Dolby Laboratories, 100 Potrero Ave, San Francisco, CA 94103, Email: wzj@dolby.com (Wenyu Jiang)
Abstract	In wireless network monitoring, received packets such as MAC frames may contain bit errors. Such errors either makes the monitoring data less accurate, or forces the monitoring software to drop errored frames to avoid such inaccuracy. We present a MAC layer based measurement technique for monitoring 802.11 networks. It can correct bit errors in certain MAC headers without the use of FEC or redundant data. This allows greater accuracy and/or extended range in network monitoring even when signal reception is less than ideal. This technique has several other applications. First, it provides better support for cross-layer protocols such as UDP-Lite, because a MAC frame with a corrupted destination MAC address would have been discarded in the OS stack even with UDP-Lite enabled. Second, the technique allows blind estimation of bit error rate in the received MAC frame, so that a multimedia decoder can decide to whether perform soft-decoding on the corrupted media payload, or to rely on previous media packet for error concealment. Finally, it facilitates the use of NAK frames, which could improve 802.11 MAC layer performance if such modifications are adopted. We evaluate our technique in an 802.11 testbed, quantifying its performance gain over a normal 802.11 monitoring application.
Starting Page	1
Ending Page	8
File Size	220766
Page Count	8
File Format	PDF
ISBN	0780395492
DOI	10.1109/WIOPT.2006.1666489
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-02-26
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Estimation error Wireless networks Bit error rate Measurement techniques Forward error correction Media Access Protocol Error correction Decoding Monitoring Payloads
Content Type	Text
Resource Type	Article

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