NETWORK SWITCHING SYSTEM WITH ASYNCHRONOUS AND ISOCHRONOUS INTERFACE

• US 20090092130A1
• Filed: 12/09/2008
• Published: 04/09/2009
• Est. Priority Date: 04/07/1999
• Status: Active Grant

• Current Assignee: Juniper Networks Incorporated
• Original Assignee: Juniper Networks Incorporated
• Inventors: KOYAMA, Akira
• Granted Patent: US 8,249,061 B2
• Time in Patent Office: Days
• US Class Current: 370/352
• CPC Class Codes: H04L 12/40097 Interconnection with other networks LAN interconnection over a bridge based backbone H04L12/462; single bridge functionality H04L12/462
• CPC Class Codes: H04L 12/4013 Management of data rate on the bus systems modifying transmission characteristics according to link quality H04L1/0001
• CPC Class Codes: H04L 12/403 with centralised control, e.g. polling
• CPC Class Codes: H04L 12/66 Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
• CPC Class Codes: H04M 7/121 Details of network access arrangements or protocols

Abstract

To provide a switching system with telephone switching function mainly on the basis of hardware processing by using isochronous channel which is a real time communication channel. The switching system comprises a gateway node connected with ISDN (Integrated Services Digital Network) and PSTN (Public Switched Telephone Network), and one or more extension nodes, and a serial bus such as IEEE 1394 bus. The gateway node transforms data rate of outside line into data rate of extension node, and the other way around, and secure a seamless communication channel. Concretely, the gateway node secures an isochronous channel, according to a request from the extension nodes or the outside line, and executes switching such as transfer or reservation. A resource manager holds a table for managing the gateway node and extension node.

Claims

1. A network switching system wherein stream data transferred on a serial bus are exchanged through a gateway between an outside line and an extension node, or between an extension node and the other extension node, wherein said extension node comprises:

control/memory unit for storing physical identifiers and telephone numbers of said gateway node and extension nodes and for controlling said network;

an asynchronous interface, for selecting said extension node and controlling a switching timing, connected with said control/memory unit;

a rate conversation unit for converting data rate of said stream data in said network into that in said outside line, or converting the other way around; and

an isochronous interface, for transmitting and receiving said stream data, connected with said rate conversion unit.

2-9. -9. (canceled)