Multiplex system for a personal handy phone system
US5602837A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 8, 1996 |
| Grant date | Feb 11, 1997 |
| Priority date | — |
| Expiry date | Apr 8, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W88/181
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.