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–Hocquengem 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.

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

A new technique is developed to analyze the cell loss behavior of individual connections in finite intervals for ATM networks. The technique is applied to partial buffer sharing (PBS) in deriving formulae for calculating cell loss rate and queue length distributions for each cell class in a single connection in finite intervals. To maximize network utilization, a new and more flexible cell loss control mechanism called threshold-based loss balancing (TLB) is proposed which restricts the violation probability of each cell class. Comparisons of TLB and PBS on selected operating conditions reveal that TLB can accept more connections under the same workload conditions. PBS is shown to be a special case of TLB.