Joint Erlang capacity of DS/CDMA forward link based on resource sharing algorithm

In future mobile communication systems, forward link may be a limiting one because emerging data services are likely to require higher data rates in t he forward link than in the reverse link. In this paper, we derive joint Er lang capacity of a DS/CDMA forward link in terms of both outage probability and blocking probability for each type of traffic in a mixed traffic envir onment. Resource sharing algorithm and generalized Erlang model are employe d to derive joint Erlang capacity of the DS/CDMA system with various types of traffics. The joint Erlang capacity reflecting both outage probability a nd blocking probability of each type of traffic is obtained by an approach based on virtual circuit switching perspective. We take into account effect of closed loop power control in the analysis. From numerical results, it i s confirmed that blocking probability as a QoS (quality of service) paramet er has a significant impact on the forward link capacity. The results of th is paper can be applied to design of the DS/CDMA systems supporting wireles s multimedia traffics.