Node apparatus and communication network
US4885742A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 27, 1989 |
| Grant date | Dec 5, 1989 |
| Priority date | — |
| Expiry date | Jan 27, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/44
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A node apparatus is used in a communication network having a hierarchical structure and transmission paths each coupling one node apparatus to another node apparatus or a terminal device. The node apparatus has at least one high order direction port, low order direction ports, and a control unit for controlling the coupling of the high order direction port and the low order direction ports. When signals are transmitted from the terminal devices approximately at the same time, one of the signals which first reaches the node apparatus provided in a highest order layer is broadcasted within the communication network and remaining signals are eliminated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.