Analysing Integrated Terrestrial-satellite Networks

A. Jayasuriya (Australia)


Network Modelling and Simulation, Overflow traffic fromcellular networks, Phase-type distributions, TerrestrialSatellite network integration


-- Third generation mobile communication networks promise to provide a variety of high data rate services with higher Quality of Service (QoS) than second-generation systems. Satellite networks, which will be integrated with terrestrial networks, are a major feature in third generation networks. Satellite networks intend to provide coverage for rural areas and to act as an overlay network in urban areas. These overlay networks can be used to support the users blocked in terrestrial handover. It is important to carefully analyse and dimension the satellite network to optimise the expensive satellite resources while providing the required QoS for users. Channel holding time of a cell is one of the major parameters that needs to accurately modelled in theses teletraffic analyses. This paper focuses on using Phase-type distributions of Generalised Erlang form to model channel holding in satellite networks. In this paper it is assumed that the traffic in satellite network is sorely consist of overflow traffic due to blocking in terrestrial networks. We also present the Quasi-Birth-Death (QBD) process that results from queuing models in satellite networks with Generalised Erlang service and exponential interarrival distributions. We then use the properties of Erlang distributions and characteristics of channel allocation process of satellite networks to simplify the queues used to model satellite networks. The use of these simplifications provide a significant reduction in computation time required to solve these QBD processes.

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