On the impact of soft hand-off in cellular systems

Authors:
Nidhi Hegde;Khosrow Sohraby
Affiliations:
Computer Science Telecommunications, University of Missouri-Kansas City, 5100 Rockhill Rd., Kansas City, MO;Computer Science Telecommunications, University of Missouri-Kansas City, 5100 Rockhill Rd., Kansas City, MO
Venue:
Proceedings of the 2000 ACM SIGMETRICS international conference on Measurement and modeling of computer systems
Year:
2000

Citing 2
Cited 1

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Modelling of the WCDMA interface in the UMTS network with soft handoff mechanism

GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications

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Abstract

We present a model for soft, hand-off in wireless cellular networks. In such networks, due to overlapping cells, hand-offs are not instantaneous and multiple channels may be occupied by a single mobile for a non-zero freeze time period.We provide a mathematical model of wireless cellular networks with soft hand-offs. We examine different performance measures and show that freeze time may have a major impact on the system performance if the mobility rate is not negligible. Both exact and approximate formulations are given. Different fixed-point approximation methods are used to reduce the complexity of the exact solution. Various performance measures such as new and hand-off blocking and probability of a call dropout are carefully examined.