DocumentCode :
3557941
Title :
PEEC: a channel-adaptive feedback-based error
Author :
Soltani, Sohraab ; Radha, Hayder
Author_Institution :
Dept. of Comput. Sci. & Eng., Michigan State Univ., East Lansing, MI
Volume :
26
Issue :
8
fYear :
2008
fDate :
10/1/2008 12:00:00 AM
Firstpage :
1376
Lastpage :
1385
Abstract :
Reliable transmission is a challenging task over wireless LANs since wireless links are known to be susceptible to errors. Although the current IEEE802.11 standard ARQ error control protocol performs relatively well over channels with very low bit error rates (BERs), this performance deteriorates rapidly as the BER increases. This paper investigates the problem of reliable transmission in a contention free wireless LAN and introduces a packet embedded error control (PEEC) protocol, which employs packet-embedded parity symbols instead of ARQ-based retransmission for error recovery. Specifically, depending on receiver feedback, PEEC adaptively estimates channel conditions and administers the transmission of (data and parity) symbols within a packet. This enables successful recovery of both new data and old unrecovered data from prior transmissions. In addition to theoretically analyzing PEEC, the performance of the proposed scheme is extensively analyzed over real channel traces collected on 802.11b WLANs. We compare PEEC performance with the performance of the IEEE802.il standard ARQ protocol as well as contemporary protocols such as enhanced ARQ and the hybrid ARQ/FEC. Our analysis and experimental simulations show that PEEC outperforms all three competing protocols over a wide range of actual 802.11b WLAN collected traces. Finally, the design and implementation of PEEC using an adaptive low-density-parity-check (A-LDPC) decoder is presented.
Keywords :
IEEE standards; automatic repeat request; error correction codes; error statistics; forward error correction; parity check codes; protocols; wireless LAN; A-LDPC; ARQ; BER; IEEE802.11 standard; PEEC; WLAN; adaptive low-density-parity-check decoder; bit error rates; channel-adaptive feedback; error control protocol; reliable transmission; wireless MAC layer; Analytical models; Automatic repeat request; Bit error rate; Decoding; Error correction; Feedback; Forward error correction; Performance analysis; Wireless LAN; Wireless application protocol; Automatic repeat request; Channel coding; Feedback communication; Forward error correction; Wireless LAN;
fLanguage :
English
Journal_Title :
Selected Areas in Communications, IEEE Journal on
Publisher :
ieee
Conference_Location :
10/1/2008 12:00:00 AM
ISSN :
0733-8716
Type :
jour
DOI :
10.1109/JSAC.2008.081004
Filename :
4641948
Link To Document :
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