In order to provide the guaranteed mobile QoS (Quality-of-service) for arriving multi-class calls, we need to minimize the dropping rate of handoff calls while at the same time controlling the blocking rate of new calls. This paper proposed a new multi-class call admission control mechanism that is based on dynamically formed reservation pool for handoff requests. The simulation results show th...

This paper investigates the performance of an integrated voice/data wireless mobile network where a finite buffer is provided for voice calls since they can endure a tolerable time, or the reneging time, for service. Based on a given humanistic reneging time, we analyze the voice traffic blocking probability. The probability distribution of receiving service within the reneging time is obtained...

In this paper we evaluate the performance of an hybrid and adaptive call admission control protocol for UMTS cellular networks with underlying tunnel-WLANs. either at the cell periphery or elsewhere within the UMTS coverage area. This CAC policy is proposed to limit the occurrence of hard IEEE 802.11 WLAN-UMTS handovers to mobiles using real time applications. It is based on the service class d...

Next Generation Networks (NGNs) are primarily propelled by huge potential market for systems of communication and services to suit individuals, which yield ubiquitous and tether-less access to users. Providing seamless handover and ubiquitous services in NGN presents many new research challenges. Priority based call management scheme is necessary to provide low call dropping probability for hig...

Two important Quality of Service (QOS) parameters in cellular networks are call blocking probability (CBP) and handoff dropping probability (HDP). CBP represents the probability that a new call is blocked due to unavailability of channels. HDP represents the probability that a handoff call is dropped if no channel is available in the new cell. How to keep the probability of handoff drops within...

Actual call connection time (ACCT) is the total time that a mobile user engages in communications over a wireless network during a call connection. Due to limited network resources of wireless mobile networks, a call connection may be prematurely disconnected and the ACCT for the call in general may not be the same as the requested call connection time (RCCT). The ACCT depends not only on the R...

Wireless multimedia networks are becoming increasingly popular as they provide users the convenience of access to information and services anytime, anywhere and in any format. The upcoming wireless cellular infrastructures such as third generation (3G) and fourth generation (4G) are deemed to support new high-speed services with different Quality-of-Service (QOS) and their respective traffic pr...

In this study, a new handoff strategy to improve the performance of wireless mobile networks is presented. It has been found form this study that the dropping probability of handoff calls is drastically reduced compared to the existing method of channel reservation strategy of handoff calls and the performance of new calls can be improved. The strategy is that the new call should be delayed the...

The paper considers the computation method in the performance evaluation of cellular network in the phase-type distribution assumptions that the channel holding times induced from mobility are modeled by well-fitted distributions to reflect an actual situation. When ww consider a phase-type distribution model instead of exponential distribution, the complexity of the computation increase expone...

In this paper, the arrival of calls (i.e., new and handoff calls) in a personal communications services (PCS) network is modeled by a Markov arrival process (MAP) in which we allow correlation of the interarrival times among new calls, among handoff calls, as well as between these two kinds of calls. The PCS network consists of homogeneous cells and each cell consists of a finite number of chan...