Performance Enhancement of End-to-end Quality of Service in Wcdma Wireless Networks

1 Computer Engineering Department, UET Taxila, Electronic Engineering Department, MAJU Islamabad, Computer Engineering Department, UET Taxila Pakistan [[email protected], [email protected], [email protected]] ABSTRACT: In this paper we proposed user satisfaction architecture for packed-switched services in 3 generation cellular networks for end-to-end Quality of Service (QoS) provisioning in Diffserv IP network environment. The paper focuses on mapping of QoS classes from Diffserv to UMTS, Admission control, Buffering and scheduling. The Diffserv code point was utilized in the end-to-end quality of service provisioning to differentiate various type of multimedia real time traffic. This paper proposes the WCDMA based prioritized uplink call admission control that combines the QoS tolerance and service differentiation for data and multimedia traffic by priority. This algorithm reserves some bandwidth margin, number of users and power consumption to decrease handoff failures to give preference to high priority calls, such as handoff calls additionally Low latency queuing (LLQ) is implemented to improve the quality of service. LLQ is used with the key idea of mapping voice and video traffic in two different queues but at the same time using priority queuing within LLQ for both voice and video traffic for all other QoS classes. The results obtained from simulations demonstrate that proposed algorithm meet the QoS requirement.