Call Admission Control in OFDM Wireless Multimedia Networks

Call admission control is an effective mechanism to guarantee robust services in wireless networks. In this paper, the authors present several call admission control algorithms and queueing models for the subcarrier allocation in the OFDM-based wireless multimedia networks. Call connection requests are differentiated into narrow-band call and wide-band call. For either class of calls, the traffic process is characterized as batch arrival since each call may request multiple subcarriers to satisfy its Quality-of-Service (QoS) requirement. The batch size is a random variable following a probability mass function (pmf) with realistically maximum value.