Wireless telephone system
US5995844A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 20, 1997 |
| Grant date | Nov 30, 1999 |
| Priority date | — |
| Expiry date | Jun 20, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W88/02
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a wireless telephone system, a wireless section of the base station for informing talking mobile wireless terminals of a connection request through a first frequency and for transmitting/receiving control data to a mobile wireless terminal which is in a reception waiting state through a second frequency during talking between the mobile wireless terminals is further simply constituted. Synchronous information is transmitted from the base station through the first frequency, and the first and the second mobile wireless terminals which have received the synchronous information perform a bi-directional and direct talking in a synchronized manner with the base station on the basis of the synchronous information. In this way, the base station is able to ensure a free period which is allocated to switching of the oscillation frequency of a frequency-selecting oscillators and to transmission/reception of the control data by using the second frequency, in addition to a period for transmitting the synchronous information through the first frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.