Train radio telephone system using home location register (HLR)
US5937350A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 28, 1996 |
| Grant date | Aug 10, 1999 |
| Priority date | — |
| Expiry date | Mar 28, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W84/005
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A train radio system with a simple network structure that is suitable for a safe radio transmission. The train radio system comprises radio stations (R), which are arranged along a route, and a mobile station (MS) which is mounted in a vehicle moving along the route, and comprises a transceiver (TRX) and a data bank (HLR) that is connected thereto, into which identification codes (IDn, IDn+1) for the radio stations (R) can be entered. A signalling channel (ACH) is provided, through which each radio station (R) transmits its identification code to the mobile station to establish the radio link for checking into the data bank (HLR). In this way the mobile station (MS) forms a single traveling radio cell to provide radio to those radio stations (R) that are located inside this radio cell. The infrastructure, which essentially comprises the radio stations, can be realized simply and requires no costly network structure. Furthermore, two and more radio stations (R) can simultaneously check into the traveling radio cell, which makes a safe radio transmission possible.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.