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Title:
BEAM STEP METHOD AND EQUIPMENT IN SATELLITE CELLULAR COMMUNICATION SYSTEM
Document Type and Number:
Japanese Patent JP3845158
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To provide a method and equipment for unnecessitating a channel for hand off by reducing processings necessary for hand off between cells.
SOLUTION: In a satellite cellular communication system 10, a phase adjusting array antenna includes a dynamic beam forming device generating individual antenna beam 35 for communication between with a subscriber's a unit. Satellites 12 are arranged within plural orbits 14. When a satellite travels with respect to the surface of the earth, each antenna beam 35 is made to inversely step to compensate for the traveling of the satellite 12. After each satellite 12 travels by a distance equal to the prescribed part of the interval of the satellites within the orbit, the antenna beam of each satellite 12 is made to step forward to replace the foot print of a later satellite 12. Consequently, the subscriber's unit communicating within an antenna beam unnecesitates hand off between the cells.


Inventors:
イー・グアン・ジャン
ケネス・メイナード・ピーターソン
Application Number:
JP1996000318811
Publication Date:
November 15, 2006
Filing Date:
November 13, 1996
Export Citation:
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Assignee:
MOTOROLA INCORPORATED
International Classes:
H01Q3/26; H04B7/195; H01Q21/00; H04B7/15; H04B7/204; H04B7/26; H04Q7/36; (IPC1-7): H04B7/195; H01Q3/26; H01Q21/00; H04B7/15; H04B7/26; H04Q7/36
Domestic Patent References:
JP7162351A
JP4268474A
JP2085380U
Foreign References:
WO1995028747A1
Attorney, Agent or Firm:
池内 義明
大貫 進介
本城 雅則



 
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