Computer-communications concentrator for transmission and switching of packetized data
US4354263A · kind A · utility
Inventors
Key dates
| Filing date | Jun 11, 1980 |
| Grant date | Oct 12, 1982 |
| Priority date | — |
| Expiry date | Jun 11, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/40
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A computer-communications concentrator for establishing connections between a plurality of asynchronous computer-communications terminals and a two-way computer-communications channel for transmission and switching of packetized data. The concentrator is comprised of one processing unit which is operated asynchronously and is connected to the computer-communications terminals. One X25 interface normalizing function processing unit is connected to the two-way computer-communication channel, with, between the two processing units, a communication system comprised of one memory unit having a first part in which each packet transmitted in one or the other direction is stored, and a second part comprised of forward and return cell pairs. Each cell is provided to store a packet header during a transfer into the communication system, each local header containing the address of the packet stored in the first part of the memory unit, its length, and some data relevant to the type of packet, the interpretation of which is used to determine in the processing unit which reads it, the appropriate processing to be done for the packet at hand. Each link between a terminal and the two-way channel …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.