Data networks
An efficient scheme to reduce handoff dropping in LEO satellite systems
Wireless Networks
UMTS Networks: Architecture, Mobility and Services
UMTS Networks: Architecture, Mobility and Services
Traffic characteristics of LEOS-based global personal communications networks
IEEE Communications Magazine
Satellite UMTS/IMT2000 W-CDMA air interfaces
IEEE Communications Magazine
Open-loop power control error in a land mobile satellite system
IEEE Journal on Selected Areas in Communications
Multiple-access capacity in mobile user satellite systems
IEEE Journal on Selected Areas in Communications
Personal communication systems using multiple hierarchical cellular overlays
IEEE Journal on Selected Areas in Communications
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The continuous growth of subscribers and the large variety of requested services in cellular communication networks are driving the telecommunication industry to provide ubiquitous information access and diversified services by requiring different bandwidth and Quality of Service (QoS). Proposals being pursued in several studies and field implementations address these needs using hierarchical architectures integrating satellite and terrestrial networks in a single advanced infrastructure. In this paper a two levels hierarchical cellular communication network has been analyzed, integrating Low Earth Orbit (LEO) satellite and terrestrial layers. DS/CDMA multiple access is employed in both layers of this integrated telecommunication infrastructure. An original analytical model, based on queueing networks, has been developed for analysis of traffic. Analytical results evaluate the main system performance parameters in terms of new calls blocking probability and forced termination probability, for two classes of users.