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A Proposal for Service Satellite Selection over LEO Satellite Networks Using Geographical Location Information
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  • A Proposal for Service Satellite Selection over LEO Satellite Networks Using Geographical Location Information
  • A Proposal for Service Satellite Selection over LEO Satellite Networks Using Geographical Location Information
저자명
Dharmaratna. Umith,Tsunoda. Hiroshi,Kato. Nei,Nemoto. Yoshiaki
간행물명
Joint Conference on Satellite Communications
권/호정보
2003년|2003권 1호|pp.119-124 (6 pages)
발행정보
통신위성우주산업연구회
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정기간행물|ENG|
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기타
이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

Since LEO(Low Earth Orbit) satellite move relative to Earth, handovers are required from time to time. Some LEO satellite networks have satellites orbiting in two different direction. One from north to south and one from south to north. Communication between satellites orbiting in different directions can take place only through the polar region. Therefore when terminals are connected to satellites orbiting in different directions propagation delay in longer than when they are connected to satellites orbiting in the dame direction. Usually two satellites can be seen by a ground terminal, one satellite orbiting in each direction. Conventional service satellite selection method, select the satellite which has the highest angle of elevation to handover a terminal, which can result in two communicating terminal getting connected to satellite orbiting in different directions. In the case of handover between satellites orbiting in different directions the degradation of communication quality is higher due to drastic change in delay. In this paper we propose a satellite selection method to connect communicating terminals to satellites orbiting in the same direction, using geographical location information of the communicating terminals. We show through simulation that the proposed method reduce the delay and jitter, number of hope required for communication as well as congestion in polar region link.