Abstract
Network planning, analysis and design are an iterative process aimed at ensuring that a new network service meets the needs of subscribers and operators. During the initial start-up phase, coverage is the big issue and coverage in telecommunications systems is related to the service area where a bare minimum access in the wireless network is possible. In order to guarantee visibility of at least one satellite above a certain satellite elevation, more satellites are required in the constellation to provide Global network services. Hence, the aim of this paper is to develop wide area network coverage for sparsely distributed earth stations in the world. A hybrid geometrical topology model using spherical coordinate framework was devised to provide wide area network coverage for sparsely distributed earth stations in the world. This topology model ensures Global satellite continuous network coverage for terrestrial networks. A computation of path lengths between any two satellites put in place to provide network services to selected cities in the world was carried out. A consideration of a suitable routing decision mechanism, routing protocols and algorithms were considered in the work while the shortest paths as well as the alternate paths between located nodes were computed. It was observed that a particular satellite with the central angle of 27° can provide services into the diameter of the instantaneous coverage distance of 4081.3 Km which is typical of wide area network coverage. This implies that link-state database routing scheme can be applied, continuous global geographical coverage with minimum span, minimum traffic pattern and latency are guaranteed. Traffic handover rerouting strategies need further research. Also, traffic engineering resources such as channel capacity and bandwidth utilization schemes need to be investigated. Satellite ATM network architecture will benefit and needs further study.
Highlights
Network planning, Analysis and Design is an iterative process encompassing topological design, network syntheses and network realization
It has been noted in [2] that during the initial start-up phase of telecommunications systems, coverage is the big issue and traffic demand is minimal to a small network which will require expansion later. [3] states that coverage in telecommunications systems is related to the service area where a bare minimum access in the wireless network is possible
An in-depth study for the development of the continuous global geographical coverage are for interworking LEO satellite network and terrestrial networks has been presented in this paper
Summary
Analysis and Design is an iterative process encompassing topological design, network syntheses and network realization. A successful development of the one dimensional satellite mobility models were presented as well as the performance evaluation of the satellite mobility models regarding optimum, global terrestrial network coverage, time of geographical earth coverage and coverage angle parameters. Mathematical simulations of their parameters were carried out and it was found that the instantaneous coverage arc lengths were exponentially varying with time and continuously distributed within the four zones (quadrants) around one polar orbit. Real-time connection is required between LEO satellites, a system constellation of satellites will be needed
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