Performance Analysis of Adaptive Joint Call Admission Control to Support QoS in Heterogeneous 4G Wireless Networks

Call admission control (CAC) is one of the basic mechanisms for ensuring high quality of service (QoS) offered to the user in Wireless Heterogeneous Networks (HetNet). Based on the available network resources, it estimates the impact of accepting or blocking a new session request. Many CAC algorithms have been proposed in the literature but they were all limited by the available bandwidth. This paper analyses the bandwidth adaptation technique for the Adaptive Joint CAC (AJCAC) algorithm; it is proposed as a solution for congestion; where the AJCAC algorithm degrades the bandwidth of some ongoing users to make room for new incoming ones. A restoration process must take place when the network is underutilized; where the algorithm restores the maximum bandwidth service to the degraded users. In this paper the bandwidth degradation process was investigated and evaluated using a system-level MatLab simulation. The results showed that as the degradation in the bandwidth increases the adaption required in the network increases. On the other hand, degradation in the QoS results in a decrease in the blocking probability

A New Integrated Mobile Architecture for Heterogeneous Wireless Networks

本書目待補正[[abstract]]In wireless heterogeneous environment, the integration of wireless access network will be accomplished by seamless handover which contains many challenges i.e. service mobility, vertical handover, common authentication, unified accounting/billing, security mechanisms, QoS and service provisioning, etc. Toward this direction, our research aims to provide a complete integration of heterogeneous network architecture and support a fit mobility management for network to seamless handover. This paper offers an HIP-based vertical handover idea in heterogeneous wireless network. We propose a mobile integrated architecture in personal communication system. Moreover, we hope to contribute our research to beyond 4G (B4G) wireless networks.[[notice]]補正完畢[[conferencetype]]國際[[conferencedate]]20101015~2010101