Adaptive bandwidth allocation for handover multimedia services for quality of service performance in mobile cellular networks

Abstract

With the explosive growth of multimedia services in the telecommunication industry due to the increase in the role of communication in the recent past, Quality of Service (QoS) provisioning and ensuring fair bandwidth allocation has become more and more challenging. Moreover, bandwidth being a valuable and a scarce resource, it should be used efficiently. It has emerged that use of small cells is a better solution for achieving a higher capacity but it has its limitations. The consequence of using small cell sizes is the increased rate of call handovers as mobile users move between cells. In a network supporting multimedia services, frequent handovers not only result in network overload, but, and more importantly, may adversely affect the QoS of the calls due to handover failures. Therefore it cannot be argued that in a congested environment efficiency can be increased by increasing capacity. The best solution is to administer good resource management schemes. This necessitates for methods to manage handovers so that the mentioned problems do not occur. To reduce handover failures and achieve high bandwidth utilization, a design of an efficient multi-class integrated framework for Call Admission Control (CAC) and adaptive bandwidth allocation for multimedia services in mobile cellular networks is presented. The scheme exploits a new prioritized adaptive bandwidth-allocation strategy that allows the reclamation of more bandwidth from on-going non-real time calls up to an optimally determined threshold. From the simulations, the result obtained in this thesis report shows that under the adaptive bandwidth allocation scheme developed, the quality of service parameters such as throughput, packet loss, end to end delay and jitter can be controlled to satisfy the QoS requirement according to users’ requirements compared to Conventional

Internet Protocol(IP) only scheme.