JPS6313492A - Router cell - Google Patents

Abstract

PURPOSE:To transmit data with high speed by processing a data to be transmitted as an optical signal, and executing the change-over of the data route between input and output ports with a spatial optical switch. CONSTITUTION:The followings are provided: an input device 1 to input data signals DI1-DI3 from respective input ports through an optical fiber 71, the spatial switch 2, an output device 3 to output data signals DO1-DO3 form respective output ports through an optical fiber 72, an input controller 4, a switch controller 5, and an output controller 6. To the input device 1, optical detectors 11-13 to detect the data signals DI1-DI3 are provided. To the spatial optical switch 2, diffraction gratings 21 23 are provided, and to the output device optical memories 31-33 to output the data signals DO1-DO3 are provided. By replacing the processing inside the system with a light, the data can be transmitted at high speed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a router cell, and particularly to a router cell used to connect a plurality of processors to form a multiprocessor.

[Conventional technology]

For example, in large-scale information processing such as logical simulation required for the development of LSIs and large-scale systems, sequential processing by a single processor is no longer sufficient. In order to solve such problems,
A method of configuring multiple processors to achieve high-speed processing has been proposed.

A router cell is used to combine multiple processors to form such a network. A router cell has a plurality of sets of input/output ports, and each input port is switched and connected to each output port. If a router cell has two sets of input/output ports for configuring a network in addition to a processor directly connected to it and one set of input/output ports for transmitting signals, it is possible to use multiple router cells. They can be connected to form any complex network.

Details of the TJ multiprocessor can be found, for example, in Information Processing Society of Japan Transactions (1984) P, 864-872.
The paper “Logical simulation machine A-f” written in
- Technique”.

FIG. 2 is a block diagram showing an example of such a conventional Lou9 cell.

The conventional example shown in FIG.
Output port) POI, input port PI2, output port PO2, and input/output port that connects directly to the processor,
That is, it has a manual port PIF and an output port POP.

For example, data is transferred from a source router cell (not shown) connected to an input port PO1 to a destination router cell (not shown) connected to an output port PO1 via the conventional example shown in FIG. Regarding the case of transfer, the operation of the conventional example shown in FIG. 2 will be explained.

When the input control device 111 receives the 5END signal 8It (from the transfer source) and the input buffer 101 becomes empty,
Data signal D1 (from the transfer source) is input to the input buffer 101.
1 is latched, and then a Busy signal B (signal metalwork 1) is sent to the source indicating the completion of reception. Output discrimination device 211
When the input control device 111 outputs the Husy signal BIt and the output buffer 201 is empty, the data latched by the input buffer 101 is latched by the output buffer 201, the transfer destination address is decoded by the decoder, and the data is transferred to the output port. Select Po1e and send the data latched to the output buffer 201 as data signal 1)01 (to the transfer destination)
At the same time, an 8END signal S01 indicating data transfer is sent from the output control device 301 (to the transfer destination). The preparation for data transfer is now complete. Output control device 3
When 01 receives the Busy signal BOI (from the transfer destination), the output discriminator 211 erases the latched data in the output buffer 201, and the data transfer is completed. Note that when the output buffer 201 completes latching data, the input control device 111 causes the input buffer 101 to erase the data latched. As explained above, the second
In the conventional example shown in the figure, data is transferred by handshaking between the 5END signal and the Busy signal.

[Problem that the invention seeks to solve]

Conventional Rou7cells perform all of the data transfer operations described above electrically, so their operating speed is slow, and it takes a lot more time to transfer data within the network than it does to process data within each individual processor. The drawback is that the high-speed capabilities of the system are not fully utilized.

SUMMARY OF THE INVENTION An object of the present invention is to provide a router cell that can solve the above drawbacks and transfer data at high speed by replacing internal processing with light.

[Failure to solve the problem]

According to the present invention, there is provided an input device including a plurality of sets of a photodetector and a monochromatic light source for detecting an input data optical signal from a data transfer source; an output device including a plurality of source memories that sends data optical signals to data transfer destinations; and an output device that decodes address electric signals input from each of the data transfer sources and sends the addresses to each of the data transfer destinations corresponding to the decoding results. a switch control device that transmits an electrical signal and generates a grating control signal; a spatial light switch that switches between a plurality of variable pitch grating optical connections whose grating pitch is controlled by the grating control signal; and a spatial light switch in which the monochromatic light source is driven. , when the optical memory completes storage, transmits a first control electrical signal indicating that data has been transferred to the data transfer destination, and receives a second control electrical signal indicating that the data transfer destination has completed data reception. an output control device that erases the memory of the source memory and stops sending out the first control electrical signal; and an output control device that receives a third control electrical signal that indicates that the data transfer destination has transferred the data and outputs the data. When the control device is not transmitting the first control electric signal, the monochromatic light source is driven by the detection output of the photodetector, and when the detection output indicates that the input data optical signal is present, the control device drives the monochromatic light source. fourth 1b control control electricity in the form of a pulse to cause the monochromatic light source to emit light, and to stop the emission of the monochromatic light source when the first control electrical signal is sent, and to notify the data transfer source that data reception has been completed; A router cell is obtained which is characterized in that it is equipped with an input screen 19Pi for sending out a pipe.

[For production]

The input device is equipped with a photodetector and monochromatic light source corresponding to each transfer source, and the photodetector detects the input data optical signal from the transfer source, and is controlled by the input control device to detect the photodetector. The output drives a monochromatic light source.

At this time, if there is an input data optical signal, the monochromatic light source emits light,
Without it, it won't emit light.

The output device includes a source memory corresponding to each transfer destination.

The spatial optical switch is equipped with a variable pitch diffraction grating corresponding to each monochromatic light source of the input device, and is controlled by the switch control device to optically connect the monochromatic light source corresponding to the transfer source and the source memory corresponding to the transfer destination. do.

The input control device receives a third control electrical signal (SE
ND signal), the output control device confirms that the source memory corresponding to the transfer destination is not in a storage state because it has not sent the first control electrical signal to the transfer destination, and then
Drives the monochromatic light source of the input device (corresponding to the transfer source). As a result, if the input data optical signal is input from the transfer source at this time, the output data optical signal is sent to the transfer destination, and if it is not input, the output data optical signal is not sent.

The output control device sends a first control electric signal (8ENL signal) to the transfer destination when the optical memory completes storage, and erases the memory of the optical memory when receiving a second control electric signal (Busy signal) from the transfer destination. At the same time, the transmission of the first control electric signal is stopped, and the data transfer is completed. The input control IT confirms the completion of storage in the optical memory by sending the first control electric signal from the output control device, stops the monochromatic light source from emitting light, and sends a pulsed fourth control electric signal ( Busy signal).

The spatial optical switch switches optical connections as described below.

Diffraction grating 1: When monochromatic light with a wavelength λ is incident, the diffraction angle θ of the +1st-order diffraction source changes as expressed by the following equation, corresponding to the grating pitch d.

sinθ=λ/d (1
) The switch control device causes the monochromatic light output from the monochromatic light source corresponding to the electrical transfer source to enter the source memory corresponding to the transfer destination.

As explained above, the router cell of the present invention uses light to temporarily store and transfer data, and electrically performs transmission of the 5END signal, Busy signal, address signal, and transfer processing using these signals.

〔Example〕

The present invention will be described in detail below with reference to drawings showing embodiments.

FIG. 1 is a configuration diagram of an embodiment of a router cell of the present invention.

The embodiment shown in FIG. 1 has three sets of input/output ports, in which data signals D11-1)I3t are input from each input port via an optical fiber 71, a manually operated input device 1, and a spatial optical switch 2. and an output device 3 that outputs data signals D01 to DO3 from each output port via the optical 7-eyeper 72.
, an input control device 4 which inputs 5END signals S11 to S3 from each input port and outputs Busy signals BII to BI3, and address signals AIL to AI3 from each input port.
Input address signals AOI to AO3 from each output port.
A switch control device 5 that outputs 5 and 5 from each output port.
Outputs END signals 801 to S03 and outputs Busy signal BO
It is configured to include an output control device 6 that inputs I to BO3.

The input device 1 includes photodetectors 11 to 13 that detect data signals DII to DI3, semiconductor lasers 14 to 16 driven by the detection outputs of the photodetectors 11 to 13, and a semiconductor laser 1.
It is configured to include lenses 17 to 19 that collimate the output lights 4 to 16. The spatial optical switch 2 includes diffraction gratings 21-23. The output device is the data signal L)0
It is provided with optical memories 31 to 33 that output DU1 to DU3.

Data signal DIl-5END signal SI 1- Bus
From the transfer source (not shown) connected to the input port where the y signal BII is input/output to the transfer destination (not shown) connected to the output port where the data signal DO3/5ENL) signal 803/Busy signal BO3 is input/output The operation of the embodiment shown in FIG. 1 will be explained by taking as an example the case where data is transferred to.

FIG. 3 is a time chart of each signal in this case.

The switch control device 5 receives the address signal AI from the transfer source.
I is decoded to determine the transfer destination, the address signal A11 is sent to the transfer destination as the address signal AO3, and a lattice control signal indicating the correspondence between the transfer source input port and the transfer destination output port is generated, and the space optical switch 2 Output to.

The spatial optical switch 2 reads the voltage value addressed by the grating control signal from the built-in ROM and applies this voltage to the diffraction grating 21 . The diffraction gratings 21 to 23 are, for example,
It consists of a variable grating mode liquid crystal, and the spatial frequency of the grating is set by the applied voltage.

When the 5END signal 811 is input in this state, the input control device 4 confirms via the output control device 6 and the switch control device 5 that the 5END signal S03 is not sent out, and then controls the input device 1. A semiconductor laser 14 is driven by the detection output of the photodetector 11. As illustrated in FIG. 3, if data signal 1) II is input at this time,
The semiconductor laser 14 emits light. In this case, the diffraction grating 21
The spatial frequency is set so that the light output from the semiconductor laser 14 and collimated by the lens 17 is diffracted and input to the optical memory 33 of the output device 3.

The source memory 33 latches the input light based on the principle of optical character stability, and also sends out a data signal DO3.

When the latching of the optical memory 33 is completed, the output control device 6 outputs a 5END signal 803, and data transfer preparation is completed.

Input control device! 14 confirms the transmission of the signal S03 (8ENL) and then stops the semiconductor laser 140 from emitting light, and also sends a pulse-shaped Busy signal BI as shown in FIG.
Send I.

When the Busy signal BO3 is input, the output control device 6 erases the memory of the original memory 33 (as a result, the sending of the data signal DO3 is stopped) and stops sending the 5END signal S03, thereby completing the data transfer. .

On the other hand, the 5END signal BII is received by the transfer source, and the transfer source similarly stops sending out the data signal Dll/5END signal 811.

Note that when the 5END signal S11 is input, the data signal 1
) II is not input, the semiconductor laser 14 does not emit light, and the source memory 33 stores that there is no input light, and as a result, the data signal 1) 03 during transmission of the 5END signal 803
is not sent.

By arranging a plurality of the embodiments shown in FIG. 1 in parallel, parallel data transfer is possible.

Using the present invention, it is possible to realize a router cell having, for example, 50 sets of input/output ports.

A network can be created to transfer data between such router cells. In a conventional router cell, which is composed entirely of electrical circuits, the circuit is complicated, and a router cell with such a large number of input/output ports is unrealistic.The data transfer rate per port in a conventional router cell is 1
0MHz, but the router cell of the present invention has IGHz
Data transfer rates above are achievable.

〔Effect of the invention〕

As explained in detail above, the router cell of the present invention processes the data to be transferred as an optical signal and switches the data path between the input and output ports using a spatial optical switch, so it is possible to transfer data at high speed. Another advantage is that even if the number of input/output ports increases, it can be configured easily.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of a router cell of the present invention; FIG. 2 is a block diagram showing an example of a conventional router cell; FIG. 3 explains the operation of the embodiment shown in FIG. 1. This is a time chart for 1...Input device, 2...Space optical switch, 3...Output device, 4...Input control'j! <Placement, 5...Switch control device, 6...
...Output control device, 11-13...Photodetector, 14-16...Semiconductor laser, 21-23
... Diffraction grating, 31-33 ... Original memory. ,,4:>-. Agent Patent Attorney Uchihara "Shin 1' / -1"

Claims (1)

[Claims] An input device comprising a plurality of sets of a photodetector and a monochromatic light source that detect an input data optical signal from a data transfer source; an output device comprising a plurality of optical memories that sends data optical signals to data transfer destinations; and an output device that decodes address electric signals input from each of the data transfer sources and sends the address electric signals to each of the data transfer destinations corresponding to the decoding results. a switch control device that transmits a signal and generates a grating control signal; and a plurality of variable pitch diffraction gratings whose grating pitch is controlled by the grating control signal, each of the monochromatic light sources of the input device and the output device a spatial optical switch for switching optical connections between each of the optical memories; and a first control electrical signal for driving the monochromatic light source and transmitting a first control electrical signal indicating that data has been transferred to the data transfer destination when the optical memory has completed storage. an output control device that receives a second control electrical signal indicating that the data transfer destination has completed data reception, erases the memory of the optical memory, and stops sending out the first control electrical signal; When the data transfer source receives a third control electrical signal indicating that data has been transferred and the output control device is not transmitting the first control electrical signal, the monochromatic light source is activated by the detection output of the photodetector. and when the detection output indicates that the input data optical signal is present, the monochromatic light source emits light, and when the first control electrical signal is sent, the monochromatic light source stops emitting light and the monochromatic light source emits light when the first control electrical signal is sent. A router cell comprising: an input control device that sends a pulsed fourth control electrical signal to notify a data transfer source that data reception has been completed.