Transmission system of a packet signal in an integrated network system using a frame format flexible for various forms of the integrated network system
US4926420A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 6, 1989 |
| Grant date | May 15, 1990 |
| Priority date | — |
| Expiry date | Mar 6, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/56
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
For integration of ISDN system and LAN system, a flexible frame format is provided which comprises a frame identifier (FID) field, an address (ADDRESS) field, an data (DATA) field, and a frame check sequence (FCS) field. In a transmitting portion in the integrated system, a desired one of an ISDN data unit and an LAN data unit, an address information of a destination address DA and a source address SA, the FID indicating a type of the data unit, and the FCS are inserted in the data field, the address field, the FID field and the FCS field, respectively, to form a packet signal which is transmitted therefrom. In the receiving portion for the packet signal in the integrated system, the type of the data unit is discriminated from the FID and the address information in the packet signal, and the packet signal is processed at a corresponding one of ISDN data and LAN data processor. The use of the frame format enables to form the integrated network system in various forms. The frame format allows modification by addition of any control field. Therefore, the frame format is also used in an integrated LAN system of different type LAN systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.