Retry filter and circulating echo method and apparatus
US5469446A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 1994 |
| Grant date | Nov 21, 1995 |
| Priority date | — |
| Expiry date | Jan 26, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2001/0095
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A retry filter and circulating echo apparatus and method are provided for a digital processing system of the type having multiple nodes that communicate via one or more unidirectional rings. The nodes of a digital processing system communicate packets to each other over a unidirectional ring bus. An origination node allocates a sequence identification and transmits a packet to a destination node, which generates a first echo packet and also sets a packet filter indication to drop any further copies of that packet. The first echo packet is sent to the origination node as a confirmation. The origination node generates a second echo packet and sends the generated second echo packet onward to the destination node again as an indication that the packet will not be retransmitted. The destination node transmits a third echo packet as an indication that the sequence can be deallocated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.