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Teletraffic Performance Analysis of Multi-class OFDM-TDMA Systems with AMC

Teletraffic Performance Analysis of Multi-class OFDM-TDMA Systems with AMC,10.1007/978-3-540-89183-3_9,Hua Wang,Villy Bæk Iversen

Teletraffic Performance Analysis of Multi-class OFDM-TDMA Systems with AMC   (Citations: 1)
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In traditional channelized multiple access systems, e.g., TDMA and FDMA, each user is assigned a fixed amount of bandwidth during the whole service time, and the teletraffic performance in terms of time congestion, call congestion and traffic congestion can be easily 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 in a dynamic manner based on the wireless channel conditions. Thus a new connection attempt will be blocked with certain probability depending on the state of the system and the bandwidth requirement of that new connection. 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 with some numerical examples. I. INTRODUCTION
Conference: EuroNGI - Network of Excellence - EURONGI , pp. 102-112, 2008
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