System and method for processing passenger service system information
US5854591A · kind A · utility
Assignees
Inventor
Key dates
| Filing date | Sep 13, 1996 |
| Grant date | Dec 29, 1998 |
| Priority date | — |
| Expiry date | Sep 13, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2012/4028
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Implemented on a vehicle, a digital in-transit entertainment system that assists in providing passenger services to a plurality of end nodes of a vehicle. The system includes a multi-drop digital communication bus, preferably configured to support RS-485 standards. A plurality of zone bridge units ("ZBUs") and a system manager unit ("SMU") are coupled to the digital communication bus. At least one ZBU is responsible for signaling headend equipment to perform a requested passenger service. The SMU is also designed to signal another type of equipment if implemented in lieu of the first type. Both the ZBUs as well as the SMU are designed to contain PSS status information for every end node of the vehicle to maintain coherency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.