Decentralized line reservation interface within a local data network
US4739321A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 1983 |
| Grant date | Apr 19, 1988 |
| Priority date | — |
| Expiry date | Feb 28, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/2801
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An interface modem for use in a broadband local area data network with collision avoidance protocol. The data link controller features hardware acknowledge circuitry that acknowledges the receipt of a perfect data packet immediately upon receipt thereof without request to or assistance by the client data processing unit. The DLC prepares the acknowledgement packet from the incoming data packet and places it on the data link without going through a line acquisition protocol. Each received acknowledgment packet is placed in a transmit buffer at a known location relative to the data packet which was just transmitted, for which it is an acknowledgment so that each acknowledgment packet may be located in less time by the client data processing unit. The acknowledgment packets are logically part of the transmit process and are therefore placed in the transmit buffer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.