Multiplex communications – Duplex – Communication over free space
Patent
1996-04-08
1997-02-11
Hsu, Alpus H.
Multiplex communications
Duplex
Communication over free space
375240, 379 63, 455 541, 370385, 370435, 370524, 395 291, H04B 726, H04J 312
Patent
active
056028377
ABSTRACT:
Disclosed is a personal handy phone system subjected to improvements over the prior art system by disposing an ADPCM/PCM converter necessarily required in a base station on an exchange side, notifying error information utilizing each slot, performing interpolation processing on the exchange side. The B channel having a transmission rate of 64 kbps of ISDN is divided into the first half of 32 kbps and the latter half of 32 kbps. The voice data of 32 kbps ADPCM prepared on a radio section of the system is multiplexed on either half of the B channel divided into two halves and the system information is multiplexed on the remaining half of the channel. Processing procedures by means of an ordinary D channel can thereby be carried out as it is, independent of the PHS condition on the line exchange of ISDN and without touching entirely on a network.
REFERENCES:
patent: 4922490 (1990-05-01), Blakley
patent: 4970723 (1990-11-01), Lin
patent: 5159594 (1992-10-01), Bales et al.
patent: 5228026 (1993-07-01), Albrow et al.
patent: 5267245 (1993-11-01), Maruyama et al.
patent: 5325419 (1994-06-01), Connolly et al.
patent: 5436889 (1995-07-01), Matsumoto et al.
Hsu Alpus H.
NEC Corporation
LandOfFree
Multiplex system for a personal handy phone system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Multiplex system for a personal handy phone system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiplex system for a personal handy phone system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-348386