Message repeater and method of operation
US8310979B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 2008 |
| Grant date | Nov 13, 2012 |
| Priority date | — |
| Expiry date | May 6, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W84/005
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method is provided for operating a distributed power repeater for a train system. The method includes: (a) monitoring all radio traffic on a wireless communications channel used by the repeater to relay distributed power commands between a plurality of transmitters and receivers disposed on a plurality of trains for distributed power control of the trains; (b) determining the level of channel loading on the communications channel; (c) comparing the channel loading to a predetermined limit; (d) if the channel loading is less than the predetermined limit, relaying messages over the wireless communications channel at a first activity level; and (e) if the channel loading exceeds the predetermined limit, relaying messages over the wireless communications channel at a second activity level less than the first activity level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.