Multiplex communications – Communication over free space – Repeater
Reexamination Certificate
2006-11-07
2006-11-07
Vu, Huy D. (Department: 2616)
Multiplex communications
Communication over free space
Repeater
C370S326000, C370S442000
Reexamination Certificate
active
07133377
ABSTRACT:
In a satellite mobile telecommunications system based on the GSM standard, and using a TDMA frame structure, discontinuous transmission (DTX) mode is used to take advantage of the substantial silences which occur during normal speech. In this mode, traffic channel (TCH) data is not sent, but control of the link between a ground station and a user terminal is maintained by sending control channel data bursts (SACCH) together with silence descriptor (SID) frames. To avoid high peak to mean values of transmission power at the satellite, the emission time of the bursts is controlled so as to be uniform over the available sending opportunities. Conventional techniques for doing this cannot be used in a system which includes diversity operation. Therefore, the burst transmission time at the ground station is set in dependence on a reference provided by the user terminal which is a modified version of the reference generated for contention resolution of random access requests.
REFERENCES:
patent: 5394561 (1995-02-01), Freeburg
patent: 6035209 (2000-03-01), Tiedemann et al.
patent: 6138012 (2000-10-01), Krutz et al.
patent: 6788917 (2004-09-01), Refai et al.
patent: 2004/0170148 (2004-09-01), Parkkinen et al.
patent: 0365885 (1990-05-01), None
patent: 0837568 (1996-10-01), None
patent: 0869628 (1997-04-01), None
patent: 2288913 (1995-11-01), None
patent: 2293725 (1996-04-01), None
patent: 2295296 (1996-05-01), None
patent: WO 9621987 (1996-07-01), None
patent: WO 9809391 (1998-03-01), None
John V. Evans, “New Satellites for Personal Communications”, Scientific American, Apr. 1998, pp. 60-67.
Grayson Mark
Mullins Dennis Roy
Davis , Wright, Tremaine, LLP
Donohue Michael J.
ICO Services Ltd.
Ryman Daniel J.
Vu Huy D.
LandOfFree
Data multiplexing for diversity operation does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Data multiplexing for diversity operation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Data multiplexing for diversity operation will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3695059