Title :
Analysis of a Delay-Constrained Hybrid ARQ Wireless System
Author :
Lee, Kelvin K. ; Chanson, Samuel T.
Author_Institution :
Open Univ. of Hong Kong, Kowloon
Abstract :
A real-time wireless system using hybrid automatic repeat request to correct errors is analyzed. Packet errors are modeled by a two-state Markov chain, and batch packet arrivals are allowed. Packets are dropped at the sender if their delays exceed a time limit, possibly after a number of retransmissions. Using the delay-model approach, a closed-form expression of packet-loss probability (PLP) and an approximate formula of wireless effective bandwidth (WEB) satisfying the quality of service requirements have been derived. If Bose-Chaudhuri-Hocquenghem codes are used, an expression estimating the number of correctable bits to minimize the PLP has also been obtained. Moreover, the WEB is found to be independent of the packet size, and the PLP decreases exponentially as the WEB increases
Keywords :
BCH codes; Markov processes; automatic repeat request; bandwidth allocation; error correction; packet radio networks; quality of service; Bose-Chaudhuri-Hocquenghem codes; WEB; approximation formula; batch packet arrivals; delay-model approach; error correction; hybrid ARQ wireless system; hybrid automatic repeat request; packet-loss probability; quality of service; two-state Markov chain; wireless effective bandwidth; Automatic repeat request; Bandwidth; Closed-form solution; Delay effects; Error analysis; Error correction; Forward error correction; Kelvin; Quality of service; Real time systems; Batch arrivals; Markov chain; delay model; packet-loss probability (PLP); wireless effective bandwidth;
Journal_Title :
Communications, IEEE Transactions on
DOI :
10.1109/TCOMM.2006.884844
