Mobile communication system
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United States of America Patent
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Oct 19, 2004
Grant Date -
N/A
app pub date -
May 12, 2000
filing date -
May 14, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An optical transmission system for mobile communication compensates for disadvantages of the star type and the multicipital type systems. In the system, a radio modem for per forming modulation/demodulation between a circuit frequency electrical signal and a radio frequency electrical signal is connected to a network through an electrical signal transmission cable, a central station for performing conversion between a radio frequency electrical signal and an optical signal is connected to a relay-transmitting station for distributing and coupling optical signals through downward and upward optical fiber cables, a plurality of terminal stations for performing radio communication with a mobile communication unit and conversion between an electrical signal and an optical signal are connected to the relay-transmitting station through downward and upward optical fiber cables, the central station is connected with the relay-transmitting station by a small number of optical fiber cables, and the relay-transmitting station is connected with a plurality of terminal stations by optical fiber cables so that the terminal stations are independent from each other.
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