System capacity in OFDMA-based WiMAX
ICSNC '06 Proceedings of the International Conference on Systems and Networks Communication
Reversible fair scheduling: the teletraffic theory revisited
ITC20'07 Proceedings of the 20th international teletraffic conference on Managing traffic performance in converged networks
Modelling restricted accessibility for wireless multi-service systems
EURO-NGI'05 Proceedings of the Second international conference on Wireless Systems and Network Architectures in Next Generation Internet
Queuing with adaptive modulation and coding over wireless links: cross-Layer analysis and design
IEEE Transactions on Wireless Communications
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In traditional channelized multiple access systems, such as TDMA and FDMA, each user is assigned a fixed amount of bandwidth during the whole connection time, and the teletraffic performance in terms of time congestion, call congestion and traffic congestion can easily be obtained by using the classical Erlang-B formula. However, with the introduction of adaptive modulation and coding (AMC) scheme employed at the physical layer, the allocation of bandwidth to each user is no longer deterministic, but dynamically based on the wireless channel conditions. Thus a new connection attempt will be blocked with a certain probability depending on the state of the system and the bandwidth requirement of the connection attempt. In this paper, we present an integrated analytical model of multi-rate loss system with state-dependent blocking to evaluate the performance of multi-class OFDM-TDMA systems with AMC scheme.