Research on Stochastic Model and Call Admission Control Strategy of Adaptive OFDMA System
Lu Yan-hui①②; Yuan Shu-chong①; Yin Chang-chuan①; Yue Guang-xin①
①School of Telecommunication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China;②School of Information Engineering, Zhengzhou University, Zhengzhou 450001, China
Abstract：Based on the analysis of OFDMA system capacity, a stochastic model, M| M| m| n Markov queue model, is proposed. According to the model, the call admission control strategy is presented, where the number of call connections into the network is limited by the system throughput and user’s QoS requirements. The results demonstrate that the M| M| m| n model is suitable to adaptive OFDMA system supporting for FTP service, and the curves of blocking probability verse arrival rate and average service time verse arrival rate achieved by it coincide with that provided by the simulating results.
2007, Vol. 29 
