Admission and GoS control in a multiservice WCDMA system

Authors:
Jean Marc Kelif;Eitan Altman;Ioannis Koukoutsidis
Affiliations:
France Telecom R&D, 38-40 Rue du Géénéral Leclerc, 92794 Issy-les-Moulineaux Cedex 9, France;INRIA BP93, 2004 Route des Lucioles, 06902 Sophia-Antipolis Cedex, France;INRIA BP93, 2004 Route des Lucioles, 06902 Sophia-Antipolis Cedex, France
Venue:
Computer Networks: The International Journal of Computer and Telecommunications Networking
Year:
2007

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Abstract

We consider in this paper a WCDMA system with two types of calls: real time (RT) calls that have dedicated resources, and data non-real time (NRT) calls that are treated using a time-shared channel (such as the HDR or the HSDPA). We consider reservation of some resources for the NRT traffic and assume that this traffic is further assigned the resources left over from the RT traffic. The grade of service (GoS) of RT traffic is also controlled in order to allow for handling more RT calls during congestion periods, at the cost of degraded transmission rates. We consider both the downlink (with and without macrodiversity) as well as the uplink and study the blocking probabilities of RT traffic as well as the expected sojourn time of NRT traffic. We further study the conditional expected sojourn time of a data connection given its size and the state of the system. Finally, we extend our framework to handle handover calls.