JPH0644398B2 - Information processing system - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information processing system, and more particularly to an information processing system capable of storing and reading information without using an address and allowing unnecessary information to be naturally erased while leaving important information. It is a thing.

In storing information, frequently used information is saved for a long time, and conversely, unused information is deleted,
It is necessary to store the information generated one after another within the limited capacity of the storage medium. Also, in the use of information, it is desirable that the information can be retrieved without recognizing where the information is stored in order to simplify the processing.

Conventionally, magnetic recording media and the like have been used to store information, but these have fixed information storage locations, and in writing and reading information, the location must be recognized in advance. . Also, once you remember the memory, it will not fade away unless you turn off the power or erase the information at once. Therefore, when the amount of information is large or the information is used by multiple processors,
There is a drawback in that management of information storage addresses and management of conflicts between processors for writing and reading information become complicated.
In addition, when erasing information, it is necessary to manage the time of erasing for each individual information, and as the amount of information increases, the storage and processing of the information becomes enormous and complicated. .

In order to solve the drawbacks of the prior art, the present invention uses a data transmission line as a storage medium, sends the data onto the transmission line, and then keeps the data as it is. If necessary, the address is not specified. Extracting the fetched data, and gradually erasing the data with low utilization while the data is repeatedly circulating on the transmission line, and changing the transmission line to keep the data depending on the content and importance of the data. The present invention provides a novel information processing system that can easily control the period until data is erased.

Hereinafter, the present invention will be described based on Examples.

FIG. 1 shows the overall configuration of the information storage system according to the present invention. This system includes a loop storage transmission line 1 or 2 for storing data to be stored, a plurality of transmission control devices 11, 12, 13 on a loop having the same structure.
And 21 to 28, the control devices 31, 32, 33 and 41 to 45 for sending the processed data to the loop transmission line and processing the data read from the loop transmission line, and the paired transmission control device and the control device. Bidirectional transmission line 51 to be connected
-53, 61-63, 71-75, and bidirectional transmission line 81 for connecting the control device and an external terminal device (not shown)
It consists of ~ 85. Here, the control devices 31 to 33 are referred to as level 1 control devices and 41 to 45 are referred to as level 2 control devices. The level 2 control devices 41 to 45 process the data collected from the external terminal device and send the data to the transmission control devices 21 to 25 of the loop 2 in order to store the result. Also, collect necessary data from the memory loop 2,
Process and send the result to the external terminal device. On the other hand, the level 1 control devices 31 to 33 select and collect from the data flowing in the storage loop 2 important data such as important data, collect and process the data, and Is sent to the storage loop 1.

A method in which the control devices 31 to 33, 41 to 45 fetch necessary data from the transmission control devices 11 to 13 or 21 to 28 will be described with reference to FIGS.

FIG. 2 shows a message format 100 flowing over loops 1, 2. The message 100 includes fields of a head flag 110, an end flag 140, a content code 120 indicating the content of data, and data 130. The content code 120 is attached by the control devices 31 to 33, 41 to 45 that generated the data 130. Each of the transmission control devices 11 to 13 and 21 to 28 determines whether or not to receive by looking at the content code 120 of the message 100 flowing through the loop. Which content code the transmission control device should receive depends on the content code registered in advance in the table in each transmission control device from the corresponding control device. The loop performed by each control device and the exchange of data from the external terminal device and the registration of the content code in the transmission control device are as follows.

FIG. 3 shows a concrete structure of one control device, for example, 41. This device comprises a processing device 400, an interface 410 with the transmission control device 21, and an interface 420 with the terminal device. In the case of the level 1 control device, the interface 420 serves as a connection interface with the transmission control device on the loop 2 side.
The processing device 400 has a memory, and the memory includes a first reception buffer 430 for storing the reception data from the interface 410 side, a second reception buffer 440 for storing the reception data from the interface 420 side, and an interface. A first content code table 450 storing the content code of the data to be received from the 410 side, a second content code table 460 storing the content code of the data to be received from the interface 420 side, and data to be sent to the interface 410 side. And a second transmission buffer 480 for storing data to be sent to the interface 420 side.

The control device 41 sends out the data of the first content code table 450 to the transmission control device 21 via the interface 410 when the power is turned on or when the content code of the data to be received is changed. In the case of the level 1 control device, for example 31, the data of the second content code table 460 is further sent out to the other transmission control device 28 via the interface 420.

The content code of the message to be received sent from the control device 41 is written in the content code registration table 270 in the transmission control device 21 shown in FIG. The transmission control device 21 takes in if the content code 120 of the message 100 received from the loop 2 matches any one of the codes registered in the content code registration table 270, and takes the received message through the interface 290 to the control device 41 side. Send to. The message taken into the control device 41 from the transmission control device 21 via the interface 410 is stored in the first reception buffer by the processing device 400. On the other hand, the message taken in from the external terminal device (the other transmission control device in the case of level 1) via the interface 420 is stored in the second reception buffer. When the message is stored in the first and second reception buffers 430 and 440, the processing device performs a process according to the content code and the data, and then erases the corresponding message in the buffer 430 and 440. The processing result of the data may be the first or second transmission buffer 47 depending on the direction to be transmitted.
It is stored in 0,480. The processing device 400 includes the first and second processing units.
If there are messages in the transmission buffers 470 and 480,
Interface these 41 messages
Buffers 470, 48 after sending through 0, 420
Erase the corresponding message in 0.

Next, how the message sent from the control device is sent on the loop in the transmission control device, how the data on the loop is taken in the transmission control device,
How to transfer onto the loop and how to delete unnecessary data will be described with reference to FIG. 4 showing the configuration of the transmission control device. Note that all the transmission control devices 11 to 13 and 21 to 28 have the same configuration,
Here, the transmission control device 21 will be described as an example.

The message sent from the loop 2 is sent via an interface 210 to an amplitude detection device 220 for measuring the signal amplitude of the message and a second reception buffer 250 for temporarily storing the message. The message that has passed through the amplitude detection device 220 is the first reception buffer 2
It is stored in 30. The transmission control device 21 has a processing device 200 for controlling the entire device, an interface 290 for taking in a message sent from the control device 41,
A send buffer 280 for storing the message,
A content code registration table 270 for storing the content code of the data to be received, a signal attenuator 240 for attenuating the signal level of the message output to the loop 2,
A signal reproducing device 260 and a signal attenuating device 2 for reproducing the signal level of the message output to the loop 2 to a reference value.
40 or the signal reproducing device 260, the switching switch 30 for selectively sending the output to the loop 2.
0, a check timer 370 for determining the message transmission timing. In FIG. 4, control signals 310 and 320 from the interfaces 210 and 290 to the processor 200, and the switch 30 from the processor 200.
A control signal 330 output for controlling 0, a control signal 360 for notifying the signal attenuator of the amplitude of the signal received from the loop 2 from the amplitude detector 220, and a control signal 380 for activating the amplitude detector. Each is indicated by a dotted line.

The operation inside the transmission control device 21 is as follows. Loop 2
When a message is sent from the interface 2
10 sends this message to the amplitude detector 220 and the second receiving buffer. In this case, when the interface 210 detects the flags 110 and 140 in the message 100, it outputs a control signal 310 indicating that the message has been received and that the reception of the message has ended.
When the processing device 200 knows that the message is received by the control signal 310, the processing device 200 activates the amplitude detection device 220.

The amplitude detector 220 measures the amplitude A _S0 of the received signal, and outputs a signal 360 indicating the measured value A _S to the signal attenuator 2
40 and sends the message to the first receiving buffer 23
Store in 0. The processing device 200 uses the content code 1 of the message 100 stored in the first or second reception buffer.
Check whether 20 is already registered in the content code registration table 270, and if 20 is already registered,
Taking in the message erases the message in the first reception buffer. Further, when receiving the signal 310 indicating the end of the message from the interface 210, the processing device 200 sets the message sending check timer (T ₁ ) 370. On the other hand, the control device 4
Interface 290 from 1 via data bus 71
When a message is sent to the interface 29
A signal 320 indicating the start and end of reception of a message is issued from 0 to the processing device 200. At this time, the interface 290 sends the reception message to the transmission buffer 280.

When the message is received in the second reception buffer 250, the processing device 200, if the message is to be received, receives the message from the control device 41 via the interface 290.
To the flag area corresponding to the above-mentioned transmission message in the second reception buffer, and a bit indicating the end of transmission is set. If there is a message in the transmission buffer 280, the processing device 200 sends this message to the loop 2.
As for the message in the second reception buffer 250, the value of the transmission check timer (T ₁ ) 370 is the predetermined value T.
_{When the} value reaches _{1 max} or more, the second reception buffer for which the transmission end flag is already set is transmitted to the loop 2. The transmission of the message in the second reception buffer 280 is performed after the transmission of all the messages in the transmission buffer 280 is completed. The processing device 200 sends the transmission buffer 28 to the loop 2.
When 0 or the message in the second receiving buffer 250 is transmitted, these messages are output to the signal reproducing device 260 and the control signal 330 is generated to connect the switching switch 300 to the terminal 350 side. When the message in the first reception buffer is transmitted, the message is output to the signal attenuator 240 and the switching switch 3 is used.
A control signal 330 is generated to connect 00 to the terminal 340 side. After sending the message onto the loop 2, the processing device 200 sends the sent message to each buffer 28.
It erases from 0, 250, 230 and resets the message sending check timer 370 corresponding to each message.

The conversion of the signal amplitude by the signal attenuator 240 and the signal regenerator 260 will be described with reference to FIGS. 5 and 6, respectively.

Now, the signal input by the loop is the amplitude detection device 220.
And the amplitude value is detected as A _S0 as shown in FIG. 5 (A). The signal attenuator 240 multiplies the input signal by a predetermined attenuation rate γ ₂ , converts it into a signal of amplitude A _S1 A _S1 = A _S0 · γ ₂ , and sends it out. Now, assuming that the signal amplitude of the message when it is first sent out on the loop is A _S2 and the attenuation rate of the signal between the respective transmission control devices is α, n transmission control devices always pass through the signal attenuator 240. The amplitude A of the message sent to the loop transmission line is A = A _S2 (1-nαγ ₂ ). Therefore, if the threshold value of the amplitude that allows the interface 210 to discriminate the signal is taken, when A <, the message sent by the interface 210 cannot be identified, and this message is regarded as noise. Will be erased.

On the other hand, the signal reproducing device 260 determines the amplitude of the initial value A _S2 shown in FIG. 6 (B) regardless of the amplitude A _S0 (where A _S0 ) of the input signal from the loop shown in FIG. 6 (A). Is reproduced and output.

From the above, the message on the loop attenuates in amplitude every time it passes through the transmission control device and disappears spontaneously during transmission unless it is received by the transmission control device and taken in by the control device side. However, the message that is repeatedly received is stored in the loop for a long period because the amplitude of the signal is reproduced by the transmission control device each time it is received.

In the system described above, important information among the information flowing through the loop 2 is described on the loop 1, and the number of transmission control devices connected to the loop 1 is smaller than the number of transmission control devices connected to the loop 2, and If the attenuation rate γ ₁ of the signal attenuator 240 in each transmission control device on the loop 1 is set to be smaller than the signal attenuator γ ₂ of the transmission control device on the loop 2, the message storage period on the loop 1 is reduced. It can be longer than the message storage period on loop 2.

Next, the level 2 control devices 41 to 45 cause the content code F
When a message of C ₁ is required and the message cannot be found on the loop 2 even after waiting for a certain period of time, the transmission control devices 21 to 25 cause the transmission control devices 21 to 25 to output the content code FC _{1 of the} message.
It is sufficient to request any of the transmission control devices 26 to 28 to request the message of No. 2 through the loop 2. Now, assuming that the transmission control device 26 is in charge of the content code FC ₁ , the transmission control device 26 sends the content code registration table 270 of the transmission control device 13 via the control device 33.
Register code FC ₁ at. If Metsuseji the content code FC ₁ on loop 1 if this Metsuseji the transmission control unit 13, the control device 33, is read out on the loop 2 via a transmission control unit 26, via the transmission control unit 21 to 25 Any of the control devices 41 to 4 that requested the message
Taken in 5.

As is clear from the above description, according to the information processing system of the present invention, a message can be stored and read without knowing the storage address of the message, and a message with high frequency of use or high importance can be stored for a long period of time. On the contrary, the amount of data accumulated can be controlled by spontaneously extinguishing the messages that are less frequently used or less important.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing an example of an information storage system according to the present invention, FIG. 2 is a diagram showing an example of a format of data stored in the system, and FIG. 3 is a control device 31 in FIG. To 33, 41 to 45, and FIG. 4 is a block diagram showing the details of the transmission control devices 11 to 28 in FIG.
5A and 5B and FIGS. 6A and 6B are operation explanatory diagrams of the signal attenuator 240 and the signal regenerator 260, respectively. In FIG. 1, 1 and 2 are loop transmission lines, 11-28 are transmission control devices, and 31-45 are control devices.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masakazu Akiyama, 1099, Ozenji, Tama-ku, Kawasaki, Kanagawa, Ltd. Inside the Hitachi, Ltd. Systems Development Laboratory (72) Inventor, Tadaaki Kakuya, 1099, Ozenji, Tama-ku, Kawasaki, Kanagawa In-house company Hitachi Systems Development Laboratory (72) Inventor Katsumi Kono 1099 Ozenji Temple, Tama-ku, Kawasaki City, Kanagawa Prefecture Incorporated Inside Hitachi Systems Development Laboratory (72) Koji Miyamoto 1099, Ozenji Temple, Tama-ku, Kawasaki City, Kanagawa Prefecture Hitachi Ltd. System Development Laboratory (72) Inventor Makoto Nomi 1099 Ozenji, Tama-ku, Kawasaki City, Kanagawa Prefecture Ltd. System Development Laboratory, Hitachi, Ltd. (72) Inori Sadanori Shintani 1099 Ozenji, Tama-ku, Kawasaki City, Kanagawa Prefecture Hitachi, Ltd. system development In-house (72) Inventor Koichi Ihara 1099, Ozenji, Tama-ku, Kawasaki-shi, Kanagawa Inside Hitachi Systems Development Laboratory, Ltd. (56) Reference JP-A-56-13857 (JP, A) JP-A-56-39654 ( JP, A)

Claims (3)

[Claims] 1. A signal transmission path and a plurality of devices connected to the signal transmission path, wherein data on the signal transmission path is sequentially and repeatedly relayed by the plurality of devices,
Each of the devices comprises a processing device that uses the data and a processing device that uses the data, and a device that transmits the data signal to the signal transmission path according to whether the data is used by the processing device. An information processing system, comprising: a control unit that variably controls a transmission level and relays the data, and a holding time of the data is controlled based on a transmission level of the data signal. 2. Each of the devices attaches a content code representing the content of the data to the data and transmits the data to the signal transmission path, and the data corresponding to the desired content code among the data from other devices. The information processing system according to claim 1, characterized in that only the signal transmission path is taken in. 3. A first signal transmission line and a plurality of first devices connected to the signal transmission line, wherein data is held by sequentially and repeatedly relaying the first device. 1 transmission system, a second signal transmission line and the second signal transmission line
A plurality of second devices connected to the signal transmission line, and the data on the second signal transmission line is sequentially and repeatedly relayed by the plurality of second devices so that the data is held. A second transmission system and a relay device that includes the first and second devices of the first and second transmission systems and transfers data between the first and second transmission systems. The first device transmits data to the signal transmission path according to a processing device that uses the data of the first transmission system and whether or not the data received from the first transmission path is used in the processing device. A relay unit for relaying the data by variably controlling a signal transmission level, and the relay device includes:
A part of the data of the first transmission system, which needs to be stored for a long time, is selectively transferred to the second transmission system and is required by the first device of the first transmission system. Data to be transmitted from the second transmission system to the first transmission system, and the retention time of the data retained in the first transmission system is based on the transmission level of the data signal. An information processing system characterized in that it is controlled by the following.