Performance Evaluation - Special issue on queueing networks with finite capacity
New call blocking versus handoff blocking in cellular networks
Wireless Networks
Metastability of CDMA cellular systems
Proceedings of the 12th annual international conference on Mobile computing and networking
OFDM-Based Broadband Wireless Networks: Design and Optimization
OFDM-Based Broadband Wireless Networks: Design and Optimization
Monotonicity and error bounds for networks of Erlang loss queues
Queueing Systems: Theory and Applications
IEEE Transactions on Wireless Communications
Study of a key factor for performance evaluation of wireless cellular networks: the f-factor
WD'09 Proceedings of the 2nd IFIP conference on Wireless days
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We consider a wireless cellular network serving streaming traffic. We study in this context the effect of the users mobility on their quality of service (QoS). If the arrival of a new user violates the capacity constraint, then his call is blocked. If the user is first admitted but the capacity constraint is violated later when he attempts to move, then his call is dropped. The blocking and dropping probabilities are the main QoS indicators in this model called forced termination (FT). We introduce an alternative model, called transitions backtrack (TB), where a user backtracks when his motion violates the capacity constraint. In this model, a relevant QoS indicator is the number of times the user backtracks called number of motion blocking per call. We propose some explicit expressions for the above QoS indicators as functions of the mean user speed. These expressions are validated by simulations. In particular we observe that the dropping probability in the FT model is well approximated by the number of motion blocking per call in the TB model which is expressed analytically.