QoS provisioning in micro-cellular networks supporting multiple classes of traffic
Wireless Networks - Special issue on wireless multimedia networking
On optimal call admission control in cellular networks
Wireless Networks
Channel Occupancy Times and Handoff Rate for Mobile Computing and PCS Networks
IEEE Transactions on Computers
WCDMA for UMTS: Radio Access for Third Generation Mobile Communications
WCDMA for UMTS: Radio Access for Third Generation Mobile Communications
Adaptive guard channel allocation and blocking probability estimation in PCS networks
Computer Networks: The International Journal of Computer and Telecommunications Networking
Modeling and performance analysis for wireless mobile networks: a new analytical approach
IEEE/ACM Transactions on Networking (TON)
Mobility Patterns in Microcellular Wireless Networks
IEEE Transactions on Mobile Computing
VoIP over WLAN: voice capacity, admission control, QoS, and MAC: Research Articles
International Journal of Communication Systems - Voice Over IP–Theory and Practice
Handoff trigger table for integrated 3G/WLAN networks
Proceedings of the 2006 international conference on Wireless communications and mobile computing
Signal threshold adaptation for vertical handoff in heterogeneous wireless networks
Mobile Networks and Applications
A Neighbor Caching Mechanism for Handoff in IEEE 802.11 Wireless Networks
MUE '07 Proceedings of the 2007 International Conference on Multimedia and Ubiquitous Engineering
FAST-HANDOFF SUPPORT IN IEEE 802.11 WIRELESS NETWORKS
IEEE Communications Surveys & Tutorials
An Analytic Model for the Delay in IEEE 802.11 PCF MAC-Based Wireless Networks
IEEE Transactions on Wireless Communications
Performance Analysis of the WLAN-First Scheme in Cellular/WLAN Interworking
IEEE Transactions on Wireless Communications
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Soft vertical handoff (VHO) and admission control are usually considered as two independent mechanisms ensuring respectively packet-level QoS and call-level QoS for voice calls in loosely coupled 3G/WLAN networks. In this paper, we evaluate the impact of the soft VHO on the blocking performance of the optimal voice admission control in different mobility environments where the WLAN operates the Point Coordination Function (PCF). For this purpose, we propose an accurate analytical mobility model for the soft VHO region. Then, based on the proposed model, we derive and analyze the blocking and dropping probability expressions of the optimal voice admission control algorithm in the 3G network loosely coupled to the PCF-based WLAN. Results show us that a resource-efficient soft handoff (RESHO) performs significantly better than a static-threshold soft handoff (STSHO) particularly in WLAN mobility environments. In fact, the 3G new call blocking probability reduction gained by using RESHO compared to STSHO is largely increased when mobile station (MS) velocities have low mean and high variability which typically characterizes the WLAN mobility environment. Besides, results show us that RESHO reduces all blocking and dropping probabilities. We believe that the provided model and the presented results could help design efficient MS controlled soft VHO algorithms for emergent loosely coupled 3G/WLAN networks.