Computer interconnect coupler employing crossbar switching
US4845722A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 16, 1987 |
| Grant date | Jul 4, 1989 |
| Priority date | — |
| Expiry date | Oct 16, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/2007
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A computer interconnect coupler has a set of junctors which are assigned to channel transmitters and channel receivers for the routing of messages from the channel receivers which are addressed to the channel transmitters. When a message is received by a channel receiver, the channel receiver stores the beginning portion of the message in a first-in-first-out buffer, and sends a route message request to central switch logic. If the destination transmitter or receiver is busy, the central logic places the message request on a destination queue and returns a signal to the requesting source transmitter to turn on a flow control signal which is transmitted back to the data processing device having originated the message. Any message addressed to this data processing device, however, is inserted into the flow control carrier with pauses both before and after the message, and provisions are also made to allow the data processing device to return an acknowledgment code responsive to the imcoming message. To permit incremental expansion of the coupler to accommodate an increased number of channels, additional channel interface boards may be added and a hierarchical rotating priority scheme…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.