Method of transmitting call information in a short range mobile telephone system and a radio unit for carrying out the method
US5134710A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 8, 1989 |
| Grant date | Jul 28, 1992 |
| Priority date | — |
| Expiry date | Jun 8, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W88/08
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method of transmitting calls between a radio base station (FS) and one or more portable radio telephones (PS) which are at a short distance from the base station. The base stations of the mobile radio system all have access to all carrier frequencies (f.sub.1 -f.sub.4) and transmit/receive call information with the aid of time division multiple access (TDMA). The transmission from a base station (FS) to a radio telephone (PS) occupies time slots (CH1-CH16) within one half of a frame interval and the reception occupies time slots within the other half. When a channel occupies a time slot (CH1) for transmission/reception over a given carrier frequency (f.sub.1) the remaining carrier frequencies are blocked for precisely this time slot, and a second time slot with the same (f.sub.1) or a second carrier frequency (f.sub.1 -f.sub.4) shall be used for a second channel. A radio unit for carrying out the method is described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.