System for communication between sub-transmission units under control of main transmission unit
US6459691B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 30, 1998 |
| Grant date | Oct 1, 2002 |
| Priority date | — |
| Expiry date | Nov 30, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W68/00
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A radio communication system such as a mobile communication system is provided which establishes communications between a main transmission unit and sub-transmission units. The main transmission unit transmits to the sub-transmission units simultaneously a frame including a data slot to which paging data on a call made by one of the sub-transmission units to another is added and a preamble to which a bit stream to be subjected to double spreading is added for informing the sub-transmission units of a call request. Each of the sub-transmission units includes a reproducing circuit reproducing the paging data of the received frame. The reproducing circuit is allowed to operate only when the preamble of the received frame indicates the presence of the paging data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.