PERFORMANCE STUDY OF AN INTEGRATED SATELLITE TERRESTRIAL MOBILE COMMUNICATION-SYSTEM/

Terrestrial cellular networks and mobile satellite systems are expecte d to converge towards a future integrated satellite/terrestrial mobile communication network. Besides a system globalization, the integratio n of terrestrial and satellite mobile systems will lead to the unloadi ng of the fixed part of the mobile network. This paper proposes an int egrated satellite/terrestrial mobile communication system and evaluate s its performance in terms of the blocking probability for new call at tempts, the call dropping probability and the probability of unsuccess ful call. This communication system was simulated and its performence compared with that of a stand-alone terrestrial mobile system. In the terrestrial part of the system we have considered fixed channel alloca tion (FCA) and dynamic channel allocation (DCA) techniques. Satellite channels can have equal or lower priority compared to terrestrial chan nels. The improvement of the system performance by means of satellite- to-terrestrial handovers was also estimated.