Title :
Elevation angle dependent Markov model for LEO satellite communication systems
Author :
Kwon, Young Hoon ; Sung, Dan Keun
Author_Institution :
Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Seoul, South Korea
Abstract :
Most low Earth orbit (LEO) satellite communication systems provide multiple satellite visibility in order to reduce call dropping due to the shadowing effect. When a satellite communicating with a mobile terminal (MT) is shadowed or when the coverage area of a satellite moves out of range of an MT, a handoff occurs. The handoff problem of LEO satellite communication systems is analyzed. The shadowing process of each satellite is modeled as an elevation angle dependent two-state continuous time Markov model. The probability distribution of multiple satellite visibility, which is used in the analysis, is also analytically obtained. The performance of the proposed model is evaluated in terms of the call blocking probability and the average number of handoffs during a call
Keywords :
Markov processes; mobile satellite communication; probability; telecommunication channels; LEO satellite communication systems; call blocking probability; call dropping; coverage area; elevation angle dependent Markov model; handoff problem; low Earth orbit; mobile terminal; multiple satellite visibility; performance; probability distribution; shadowing effect; two-state continuous time Markov model; Artificial satellites; Availability; Low earth orbit satellites; Mobile communication; Probability distribution; Road transportation; Satellite communication; Satellite constellations; Shadow mapping; Urban areas;
Conference_Titel :
Global Telecommunications Conference, 1999. GLOBECOM '99
Conference_Location :
Rio de Janeireo
Print_ISBN :
0-7803-5796-5
DOI :
10.1109/GLOCOM.1999.831649
