Method of providing priority access to a transmission communication ring
US4726018A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 25, 1986 |
| Grant date | Feb 16, 1988 |
| Priority date | — |
| Expiry date | Aug 25, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/433
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a communication system comprising several stations, access to the ring is granted to one station at a time by circulating a token on the ring and updating the priority of the token is disclosed. This invention provides for a first station to transmit a token immediately after it has finished transmitting a frame containing a packet(s) needed to be transmitted from the first station without waiting for the header of the frame to return to the first station. A priority signalling packet is then transmitted on the ring from the first station after the first station transmits the token on the ring. This priority signalling packet contains information as to the particular priority level that the token should be updated to. Finally, the priority level of the token is updated to correspond to the particular priority level when the priority signalling packet reaches the station that holds the token.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.