Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...
Patent
1995-06-06
1997-10-14
Chin, Wellington
Multiplex communications
Communication over free space
Having a plurality of contiguous regions served by...
370350, 370507, 370516, 375356, 375362, 375371, 455 332, H04J 306
Patent
active
056779089
ABSTRACT:
If a mobile station or a base station considers it necessary to perform a hand-over, a new base station is selected as a hand-over receiving base station and a hand-over supplying base station is defined as a master base station whereas the hand-over receiving base station is defined as a slave base station depending on the master base station. The slave base station receives a signal from the master base station, compares it with a frame timing signal of the master base station, adjusts a frame phase of the slave base station into a frame phase of the master base station, and adjusts a frame phase of a down link line from the slave base station to the mobile station into a frame phase of a down link line from them aster base station to the mobile station. Further, the slave base station adjusts, in response to a signal from a mobile station targeted to be handed over, a frame phase of an up link line from the targeted mobile station to the slave base station so that a hand-over without break can be performed.
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patent: 5258980 (1993-11-01), Maebara et al.
patent: 5363376 (1994-11-01), Chuang et al.
patent: 5483537 (1996-01-01), Dupuy
Y. Akaiwa, H. Andoh and T. Kohama, "Autonomous Decentralized Inter-Base Station Synchronization for TDMA Microcellular Systems", 1991, IEEE, pp. 257-262.
"A Study of TDMA Frame Synchronous System Between Plural Cell Stations in a Street Microcell", pp. 2-247, Autumnal Convention in 1993 of Electro Information & Communication Society.
"A Network Synchronization for TDMA Frame Synchronization Between Plural Cell Stations", pp. 2-346, Spring Convention, 1991 of Electro Information & Communication Society.
Chin Wellington
OKI Electric Industry Co., Ltd.
Vu Huy D.
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