Recent technology on satellite. 4 Mobile communication services via satellite.
نویسندگان
چکیده
منابع مشابه
Provision of Electronic Healthcare Services via DVB-RCS Satellite Communication Technology
The advent of broadband communications technologies has paved the way to the wide application of innovative, yet resource-demanding electronic healthcare services like real time telemedicine or high bandwidth store and forward transmission of medical data from underserved locations. Satellite broadband communications technologies, such as the Digital Video Broadcasting with Return Channel via S...
متن کاملSatellite Personal Communication Services (S-PCS)
Satellite personal communication services (S-PCS) are one of the recent systems available to global mobile user. The benefits with using satellites are greater coverage, especially in remote areas such as the poles or in the middle of the oceans. However, satellite communication is expensive and for personal use still in its infancy. Today there exist a number of operators delivering more or le...
متن کاملCellular Networks, Satellite Communication 1 Satellite Communication
A satellite communications system is based on antennas in a stable orbit above the earth. Satellites serve as relay stations in the sky. The basic idea of satellite communications is that two stations on earth discuss via one or more satellites. So a little bit of satellite-related terminology: 1. Earth station is an antenna on or near the surface of the earth. 2. Uplink is a transmission from ...
متن کاملResource Reservation Protocol for Mobile Satellite Communication
The Internet Engineering Task Force is working on extending the traditional TCP/IP model for supporting multimedia and real-time applications on the Internet. Thus, new protocols have been developed such as the Resource Reservation Protocol. With the rapid growth of mobile networks, the IETF is also working on creating and extending the existing protocols to support mobile users. This has led t...
متن کاملBuilding Obstruction in Satellite Mobile Communication Systems
This paper presents a simple model for the evaluation of obstruction caused by multiple buildings in satellite mobile communication systems, or in high-altitude platform (HAP) coverage. The proposed model can be useful for integration into propagation prediction tools. It is based on the KichhoffHuygens formulation, and includes the effect of ground reflections and reflections on a facing build...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Journal of the Institute of Television Engineers of Japan
سال: 1987
ISSN: 0386-6831,1884-9652
DOI: 10.3169/itej1978.41.328