Protection against multiple senders in a multipoint to point data funnel
US5926474A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 6, 1996 |
| Grant date | Jul 20, 1999 |
| Priority date | — |
| Expiry date | Jun 6, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2012/5679
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system includes protection against multiple senders in a multipoint to point data funnel that connects multiple data sources with a single data sink. The protection is afforded by employing tokens and by adopting a token protocol. In particular, a data source must be in possession of a token in order to send data on to a data funnel. The token exhibits that the data source has permission to output the data to the data funnel. The system may operate in the scheduled mode of operation where the system knows a priori when each data source will send data over the data funnel for a data sequence. The system may also operate in a nonscheduled mode where multiple data sources have data that they wish to send but the schedule of data transmissions from the data sources is not known a priori. The token protocol is adaptable to both scheduled mode and nonscheduled mode of operation. The token protocol also facilitates regeneration of tokens if tokens do not arrive at a destination that expects a token within a predetermined period of time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.