JPH01231543A - Exchange system - Google Patents

Abstract

PURPOSE:To shorten the processing time for communication of data of large capacity by separating each layer header of the OSI(open system intercommunication) from the data to deliver these headers on the different wavelengths respectively and performing the batch optical exchange operation via a wavelength dividing/exchanging means. CONSTITUTION:A frame dividing means 1 divides a data frame of the OSI into six headers of layers 2-7 excluding the physical layers and one data part. These headers and the data part are delivered on seven different types of wavelengths lambda1-lambda7 respectively. Thus a wavelength dividing OSI optical packet exchange 2 can perform approximately the batch optical exchange. As a result, a header processor 3 can process the headers individually and the internal delay time of a packet network can be shortened.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to open system intercommunication (hereinafter simply OSI).
It relates to an exchange method that can shorten the communication processing time according to the standard.

[Conventional technology]

Conventionally, a time division switching system is a typical example of this type of switching system. This time-division switching system performs switching operations by time-division multiplexing the digital signals of each line and changing the time order at the time position of a predetermined outgoing line.

The signal train after this switching (exchange) is then separated again for each outgoing line.

[Problem to be solved by the invention]

The above-mentioned conventional exchange methods, especially the time division exchange method, are subject to constraints on the "time axis", and this becomes noticeable when exchanging large amounts of data. For example, the processing time for a header for packet exchange is only a part of the time required for packet exchange, and as the amount of transmitted data increases, real-time communication processing becomes difficult.

This is common to all OSI headers, and there is a drawback that shortening of processing time cannot be expected and real-time communication processing is difficult.

[Means to solve the problem]

The switching system of the present invention separates each OSI layer header from data, outputs each layer on a different wavelength, and then performs an optical switching operation all at once using wavelength division optical switching means.

[Effect]

The present invention can shorten the OSI-compliant exchange processing time.

〔Example〕

FIG. 1 is a block diagram showing an embodiment of the switching system according to the present invention. In the same figure, 1 divides the OSI data frame into 7 pieces, each consisting of 6 layer headers from layer 2 to layer I excluding the physical layer, and 7 different data parts, as shown in figure 2. wavelength λ
, .about.λ7, 2 is a wavelength division OSI optical packet switch, and 3 is a header processing device.0 Next, the operation of the switching system with the above configuration will be explained.

First, the frame dividing device 1 divides a 50SI data frame into 6 layers from layer 2 to layer 7 excluding the physical layer.
After dividing into a total of seven layer headers and data parts, the data are outputted at seven different wavelengths λ1 to λ7. Thereby, the wavelength division OSI optical packet switch 2 can perform optical switching almost simultaneously all at once.

Therefore, the header processing device 3 can process the headers individually, and the internal delay time of the packet network can be shortened.

〔Effect of the invention〕

As explained in detail above, according to the exchange method according to the present invention, the headers of each layer of O8 can be processed separately from the data, so communication processing is hardly affected by the time axis. The time can be significantly reduced,
It is possible to perform communication processing with high real-time performance. Moreover, since OSI header processing can be performed simultaneously with data exchange processing, the processing time for large-capacity data communication can be significantly shortened.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the switching system according to the present invention, and FIG. 2 is a diagram showing the relationship between the structure of the data frame shown in FIG. 1 and the carrier wave λm. 1...Frame decomposition device, 2...Wavelength division OS
I-optical packet switch, 3...Header processing device.

Claims (1)

[Claims] In a communication processing device that complies with Open System Intercommunication (OSI), each layer header of OSI is separated from data, and after outputting each layer on a different wavelength,
An exchange method characterized by performing optical exchange operations all at once using a wavelength division optical exchange means.