Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Patent
1997-12-01
2000-08-22
Tsang, Fan
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
455 121, 370316, H04Q 720, H04B 7185
Patent
active
061085383
ABSTRACT:
In cellular communication systems, hand-offs are performed to maintain links as subscriber units (110) and beams move relative to each other. The hand-off determination procedure (500) is performed in overlap regions (240, 340). Candidate beams are identified and hand-off types are determined based on the satellite (120) associated with the candidate beam. Thresholds are established and changed to optimize a hand-off request determination procedure (500). Two hand-off types are considered. An inter-satellite hand-off is requested (514) when the current beam and the candidate beam are on different satellites (120). An intra-satellite hand-off is requested (510) when the current beam and the candidate beam are on the same satellite (120). Thresholds are dynamically changed and algorithms are used to minimize the number of inter-satellite hand-offs.
REFERENCES:
patent: 5161248 (1992-11-01), Bertiger et al.
patent: 5241685 (1993-08-01), Bodin et al.
patent: 5257402 (1993-10-01), Crisler
patent: 5276906 (1994-01-01), Felix
patent: 5408237 (1995-04-01), Patterson et al.
patent: 5574968 (1996-11-01), Olds et al.
patent: 5649291 (1997-07-01), Tayloe
patent: 5784695 (1998-07-01), Upton et al.
patent: 5884164 (1999-03-01), Gerard et al.
Bakke Bradley B.
Blasiak Dariusz Andrzej
Christian Paul Robert
Frank Mark Steven
Klekotka James E.
Motorola Inc.
Smith Sheila
Tsang Fan
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