• Please send your full manuscript to: jocm@vip.163.com

On the Tradeoff Between Blocking and Dropping Probabilities in Multi-cell CDMA Networks

G´abor Fodor1 and Mikl´os Telek2
1. Ericsson Research, SE-164 80 Stockholm, Sweden
2. Budapest University of Technology and Economics, H-1111 Budapest, Hungary
Abstract—This paper is a sequel of previous work, inwhich we proposed a model and computational techniqueto calculate the Erlang capacity of a single CDMA cell thatsupports elastic services. The present paper extends thatbase model by taking into account two important aspectsof CDMA. First, we describe a simple and a refined multicellCDMA model that are able to capture the impact ofthe neighbor cells on important performance measures ofthe cell under study. These performance measures includethe class-wise blocking probabilities and the mean time thatelastic sessions spend in the system. Secondly, we model theimpact of the outage by taking into account that in-progresssessions can be dropped with a probability that dependson the current load in the serving and neighbor cells. Wethen consider a system with elastic and rigid service classesand analyze the trade-off between the total (soft and hard)blocking probabilities on the one hand and the throughputand the session drop probabilities on the other.

Index Terms—code division multiple access (CDMA), trafficcapacity, queueing theory, Markov chains

Cite: G´abor Fodor and Mikl´os Telek, "On the Tradeoff Between Blocking and Dropping Probabilities in Multi-cell CDMA Networks," Journal of Communications, vol. 2, no. 1, pp. 22-33, 2007.
Copyright © 2013-2020 Journal of Communications, All Rights Reserved
E-mail: jcm@etpub.com