Abstract
This paper addresses cross-layer quality-of-service (QoS) provisioning in the uplink of CDMA cellular mobile networks. Each mobile can take up to four UMTS traffic classes in our model. At the data link layer and the network layer, the QoS performances are defined in terms of signal-to-interference-plus-noise ratio and outage probability, and packet loss rate and delay, respectively. A call admission control scheme which fulfills these QoS metrics is developed to maximize the system capacity. The novelty of this paper is that the effect of the lengthening of the on-periods of non-real-time traffic classes is investigated by using the Go-Back-N automatic retransmission request mechanism with finite buffer size and limited number of retransmissions in the event of transmission errors. Simulation results for a specific example demonstrate the reasonableness of the analytical formulation.
Highlights
The currently deployed universal mobile telecommunications system (UMTS) network is characterized by its ability to support multimedia communications with different bit rates and quality-of-service (QoS) requirements
Packet loss rate and delay performances are studied for Code division multiple access (CDMA) systems [7, 8]
In order to demonstrate the reasonableness of our analytical formulation presented in previous sections, numerical results are presented
Summary
The currently deployed universal mobile telecommunications system (UMTS) network is characterized by its ability to support multimedia communications with different bit rates and quality-of-service (QoS) requirements. Voice, video, web-browsing, and data are used as typical applications of these four traffic classes. Their QoS performances in the uplink are investigated and their QoS metrics are formulated at both the data link layer and the packet level of the network layer. At the data link layer, Gilhousen et al [2] studied the outage probability for a single class on/off source in CDMA networks. Packet loss rate and delay performances are studied for CDMA systems [7, 8]. Reference [8] investigated packet loss rate and delay performances in CDMA networks for voice, video, and data services. Analytical QoS formulation is given only for voice services, while video and data services are only obtained through computer simulations
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