Unlock instant, AI-driven research and patent intelligence for your innovation.

ATM link switching over method and apparatus

A technology for link switching and system switching, which is applied to time division multiplexing selection devices, multiplexing system selection devices, transmission systems, etc., and can solve problems such as delay performance reduction

Inactive Publication Date: 2003-12-10
NEC CORP
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, even a cell with a high delay priority has a large CDVT (Cell Delay Variation Tolerance) and its delay performance degrades

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • ATM link switching over method and apparatus
  • ATM link switching over method and apparatus
  • ATM link switching over method and apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

[0036] figure 1Briefly draw the composition of a double ATM switch according to the present invention, and the principles of the ATM link switching method and device of the present invention.

[0037] exist figure 1 Among them, the ATM switch is set in pairs as a working system at work and a backup system waiting to be switched to the next working system, and each system includes a temporary cell storage unit 20 or 30, a system control unit 21 or 31 and a delay priority selector 40 or 50. The incoming cell flow from the input terminal to the ATM switch is guided to the working system by the input selector 10, and the output cell flow switched by the working system is selected by the output selector 60 to the output terminal.

[0038] The temporary cell storage unit 20 or 30 temporarily stores incoming cells in each storage area according to the dela...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A system switching over method and apparatus for duplicated ATM (asynchronous transfer mode) switch, which enables keeping the delay quality of each cell unchanged without any cell loss, are realized. At the time of system switching over, the system-switching control unit in each system (a system previously in operation and a system newly in operation) mutually communicates each other and manages a temporary cell storage unit, in which cells to be read out are stored in accordance with the delay priority group, in each system, and reads out cells in the order of higher delay priority whichever the system is. A delay priority selector in the system of an operation state is controlled to provide a cell read out path for outputting cells depending on a system from which the cell being read out.

Description

technical field [0001] The invention relates to a system switching process for a dual ATM (Asynchronous Transfer Mode) switch as a working system and a backup system. Background technique [0002] Figure 5 Shows a conventional dual ATM switch disclosed by Japanese Unexamined Patent Publication No. Hei 6-6372. [0003] exist Figure 5 Among them, the ATM exchange is designed as a dual mode, one of which is the working system at work, and the other is a backup system waiting to be switched to the next working system, and each system includes a temporary battery unit 510 or 520 and a monitoring unit 511 or 521. [0004] The input cell stream from the input terminal is directed to the operating system through an input selector, and the output cell stream switched by the operating system selects an output path through an output selector. The temporary cell storage unit stores incoming cells in each storage area according to the delay class each cell has, and reads each cell fo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H04Q3/00H04L12/801H04L12/841H04L12/911H04L12/931H04L12/939H04Q11/04
CPCH04L2012/5627H04L2012/5649H04L2012/562H04Q11/0478
Inventor 松村健次山本透
Owner NEC CORP