Local area communication network
US4451827A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 22, 1981 |
| Grant date | May 29, 1984 |
| Priority date | — |
| Expiry date | Sep 22, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/44
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A communications network for providing full-duplex data transfer between any two network interface units on a one-to-all-others contention bus. Network interface units (NIUs) send and receive data signals on outgoing and incoming links, respectively, which are connected to junction boxes which couple the incoming link connected to one network interface unit to the outgoing links of only the other NIUs. The data signals have source address codes and destination address codes applied thereto, which codes are examined by each NIU receiving a data signal to determine (1) if the NIU will accept the data signal for processing and (2) if full duplex data transfer is occurring. Transmission of all data signals in the network is temporarily aborted when any two NIUs are transmitting data signals and at least the signal transmitted by one of the NIUs is not addressed to the other NIU.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.