JPH02280441A - Hybrid type exchange - Google Patents

Abstract

PURPOSE:To use a high speed channel switching function and reconnection function with a high speed channel switch in common and to easily cope with the revision of the line classification by arranging a low speed channel switch and a cell switch to the post-stage of the high speed channel switch. CONSTITUTION:A line among lines accommodating a high speed channel is connected at first to a line interface 2, in which the data passing through the line is converted to a data suitable for an internal link interface and the output connects to an outgoing line by a high speed channel switch 3 and connected to an output line via the line interface 2 again. As to a line accommodating a low speed channel, the lines enter a low speed channel switch 4 entirely via the high speed channel switch 3 and are connected to the outgoing line via the high speed channel switch 3 and the line interface 2 again, the switching processing to a cell is also similar in the case of switching of the low speed channel. When the line class accommodated in an exchange is changed, the desired switching processing is attained by having only to change the connection to the high speed channel switch 3 and post-stage switches 4, 5.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a hybrid switching system.

[Conventional technology]

As a conventional method for accommodating different types of lines that require different switching operations, it is common to group lines of the same type and connect them to different exchanges to perform switching processing. Ta.

[Problem to be solved by the invention]

According to the above-mentioned method of performing switching processing using multiple exchanges, it is necessary to group the lines by line type in advance, and to change the line type later, it is necessary to physically change the connection of the line. It takes time and effort. moreover,
Since each switch has peripheral hardware attached to the switch, there is a problem in that the amount of hardware becomes large and expensive.

[Means to solve the problem]

The hybrid switching system of the present invention includes a line that accommodates only one high-speed channel within a fixed frame format on the line, a line that accommodates a large number of multiplexed relatively low-speed channels, and a line that indicates the destination at the beginning. A high-speed system that performs exchange processing in correspondence with a cell that has a header containing an address and a fixed-length information storage part, and a line that accommodates multiplexed cells each with a different destination. channel switch, low speed channel switch,
It is equipped with three types of cell switches, and performs high-speed channel switching processing for lines that accommodate high-speed channels, and does not perform switching operations for each low-speed channel or individual cell. The high-speed channel switch that performs the switching operation is placed at the forefront, and the low-speed channel switch that performs the switching operation for each channel for low-speed channels is placed after the high-speed channel switch, and a plurality of cells with different destinations are multiplexed. This configuration includes a cell switch that performs a switching operation for each cell.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

Referring to FIG. 1 showing one embodiment of the present invention, line group 1
is a mixture of lines that require various types of switching processing.

The line interface 2 terminates the line and converts it into an internal interface of a type that is easy to process. The high-speed channel switch 3 performs switching processing for a line in which only one high-speed channel is accommodated in a frame.

That is, a logical connection is made between an incoming line and an outgoing line, and the input digital information transparently goes out. The low-speed channel switch 4 is a switch that performs channel-by-channel switching for a plurality of low-speed channels multiplexed within a frame, and is configured, for example, as a time-division switch. This switch 4 performs an exchange operation by putting data on a particular channel on the incoming line into a position within a required time slot on the outgoing line. The cell switch 5 is a switch that performs switching processing for cells, which are composed of a header section for storing fixed-length destination information multiplexed within a line frame and a section for accommodating fixed-length information. This switch 5 has a function of checking the destination information of the input cell and outputting it to the line corresponding to the destination. Among the lines accommodated in this exchange, those that accommodate high-speed channels are first converted to internal link interfaces by line interface 2, then connected to outgoing lines by high-speed channel switch 3, and then passed through line interface 2 again. and connected to the outgoing line. All lines accommodating low-speed channels are connected to the low-speed channel switch 4 by the high-speed channel switch 3. That is, data from a line accommodating a low-speed channel passes through the line interface 2 and enters the low-speed channel switch 4 through a connection established for each line by the high-speed channel switch 3. The low-speed channel switch 4 performs switching for each low-speed channel and outputs it to the outgoing internal link. The output data is again connected to the outgoing line via the high speed channel switch 4 and the line interface 2. The switching process for cells is also similar to the switching for low-speed channels. Each line is connected to a cell switch 5 via a line interface 2 and a high-speed channel switch 3, and the cell switch 5 performs switching processing on a cell-by-cell basis. When the type of line accommodated in this exchange is changed, desired exchange processing can be performed simply by changing the connection to the subsequent switch secured by the high-speed channel switch.

〔Effect of the invention〕

As described above, according to the present invention, the high-speed channel exchange function by the high-speed channel switch and the connection change function for the switch can be used together, so that changes in line type can be easily handled.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention. 1... Line group, 2... Line interface, 3...
- High-speed channel switch, 4...low-speed channel switch, 5... cell switch.

Claims (1)

[Claims] One high-speed channel in a fixed frame format.
A line that accommodates a channel, a line that accommodates a plurality of low-speed channels, and a line that accommodates a multiplexed number of fixed-length cells each having a fixed-length information section and a header indicating the destination of the information at the beginning. In addition to performing different switching processes depending on the line type, channel switching operations are performed for the line that accommodates the high-speed channel, and individual switching operations are performed for the line that accommodates the low-speed channel and the line that accommodates the cell. A high-speed channel switch that performs a switching operation for the entire frame format rather than a switching operation for channels and individual cells is placed at the forefront, and a low-speed channel switch that performs a switching operation for each channel for low-speed channels is placed after the high-speed channel switch. A switch and a cell switch that performs switching operations for each cell with a different destination are installed, and the three types of lines that require different switching processes are connected without being aware of the line type, and the switching process for the requested information is performed. This is a hybrid type switching machine that is characterized by: