JP6925889B2 - Relay device, transmission processing program - Google Patents

Description

An embodiment of the present invention relates to a relay device and a transmission processing program.

In a client-server type control system, if access from a large number of client terminal devices to a single server communication device is concentrated at the same time, the network load may increase and it may be difficult to perform real-time control. be. In particular, when processing a large number of small-sized packets, the processing load on the server network interface increases. Therefore, for example, in order to reduce the load on the network, the communication protocol is changed from TCP (Transmission Control Protocol) to UDP (User Data) in the relay path of the network.
A method of converting to gram Protocol) is known. However, in this method, real-time control may not be possible due to a delay due to arithmetic processing in the communication device.

Japanese Patent No. 5046161

An object to be solved by the present invention is to provide a relay device, a transmission processing system, a transmission processing program, and a transmission processing method excellent in shortening the response time between the terminal device and the communication device.

The relay device of the embodiment includes a first receiving unit, a calculation method buffer, a processing determination table, a processing determination unit, a calculation execution unit, and a second transmission unit. The first receiving unit receives the calculation request packet for requesting the calculation process from the terminal device. The calculation method buffer stores a calculation method for arithmetically processing the calculation request packet received by the first receiving unit. In the processing determination table, buffer data indicating whether or not the calculation method is stored in the calculation method buffer is recorded.
The processing determination unit refers to the buffer data recorded in the processing determination table, and determines whether or not to execute arithmetic processing on the arithmetic request packet received by the first receiving unit based on the buffer data. The arithmetic execution unit executes arithmetic processing on the arithmetic request packet received by the first receiving unit based on the determination of the processing determination unit. The second transmission unit transmits an operation response packet in which the operation processing result of the operation processing performed by the operation execution unit is stored to the terminal device.

The block diagram which shows an example of the apparatus configuration of the transmission processing system which concerns on Embodiment 1. FIG. The block diagram which shows an example of the functional structure of each apparatus in the transmission processing system which concerns on Embodiment 1. FIG. The figure which shows an example of the data recorded in the process determination table which concerns on Embodiment 1. FIG. The figure which shows an example of the structure of the calculation request packet which concerns on Embodiment 1. FIG. The figure which shows an example of the structure of the operation reply packet which concerns on Embodiment 1. FIG. The figure which shows an example of the structure of the calculation method request packet which concerns on Embodiment 1. FIG. The figure which shows an example of the structure of the calculation method reply packet which concerns on Embodiment 1. FIG. FIG. 5 is a flowchart showing an example of a determination flow executed by the processing determination unit according to the first embodiment. The block diagram which shows an example of the functional structure of each apparatus in the transmission processing system which concerns on Embodiment 2. FIG. The figure which shows an example of the data measured by the load measuring part which concerns on Embodiment 2.

Hereinafter, the transmission processing system according to each embodiment and the relay device constituting the transmission processing system will be described with reference to the drawings. The transmission processing system consists of a terminal device that is a plurality of client devices installed in each area, a relay device installed in each area, and a communication device that is a server connected to the relay device in each area via a wide area network. Will be done.

(Embodiment 1)
FIG. 1 is a diagram showing an example of an apparatus configuration of the transmission processing system 4 according to the first embodiment.

For example, as shown in FIG. 1, the transmission processing system 4 has a plurality of terminal devices 3a1 and 3a2 installed in the area A, a relay device 1a installed in the area A, and a plurality of terminal devices 3b1 installed in the area B. , B2, the relay device 1b installed in the area B, the relay devices 1a and 1b installed in the area A and the area B, and the communication device 2 connected via the wide area network NW2. Further, the terminal devices 3a1 and a2 are connected to the relay device 1a via the local network NW1a, and the terminal devices 3b1 and b2 are connected to the relay device 1b via the local network NW1b.
Connected via.

In order to make the explanation easier to understand, the terminal devices 3a1, a2, b1, and b2 may be abbreviated as the terminal device 3, and the relay devices 1a and 1b may be abbreviated as the relay device 1. Further, as an example, the case where the terminal device 3 and the relay device 1 are connected will be described, but the terminal device 3 and the relay device 1 may be configured by one device.

In the transmission processing system 4, a detection signal is received from a controlled object (not shown) which is an information processing device, arithmetic processing based on the detection signal is executed by the communication device 2 or the relay device 1, and the result is output from the terminal device 3. It is transmitted to the control target as a control signal.

The terminal device 3 creates a calculation request packet 50 for requesting the communication device 2 to perform a calculation based on the detection signal, and transmits the calculation request packet 50 to the relay device 1. On the other hand, the terminal device 3 receives the calculation response packet 51 storing the result of the calculation processing for the calculation request packet 50 from the relay device 1, and transmits a control signal to the control target based on the calculation reply packet 51.

The relay device 1 determines whether or not the arithmetic processing requested by the arithmetic request packet 50 can be executed by itself, and transmits the arithmetic request packet 50 to the communication device 2 according to the determination result, or calculates by itself. The operation response packet 51, which is the result of executing the process, is transmitted to the terminal device 3.

Further, when the relay device 1 determines that it cannot execute the arithmetic processing by itself, the relay device 1 requests an arithmetic method 43 for executing the arithmetic processing on the communication device 2, for example, a program or the like. The packet 52 is transmitted. Next, the relay device 1 executes the calculation process based on the calculation method 43 received from the communication device 2.

When the communication device 2 receives the calculation request packet 50 from the relay device 1, it executes the calculation process and transmits the calculation response packet 51 storing the result to the relay device 1. Further, when the communication device 2 receives the calculation method request packet 52 from the relay device 1, the calculation method 43
The calculation method in which is stored is transmitted to the relay device 1.

The wide area network NW2 may be a wide area wired communication line such as the Internet or a dedicated line, or may be a wide area wireless communication line such as 3G. Local network N
W1 is, for example, a fieldbus such as Profibus, Modbus, TC-net, etc.
Alternatively, a local wired communication line may be used, or a local wireless communication line such as a wireless LAN or a 920 MHz band may be used.

The detection signal is environmental information related to the environment in which the controlled object is installed, state information related to the state of the controlled object, or read information read from various storage media. For example, environmental information includes information indicating brightness, temperature, humidity, atmospheric pressure, weather, etc., location information such as latitude, longitude, and altitude, and
Physical information such as velocity, acceleration, and pressure, and multidimensional information such as character strings, images, videos, and sounds. The state information includes, for example, the on / off state of the power to be controlled, the current value, the voltage value, and the pressure value.
Information indicating the operating status and digital information such as bit values and byte values. The lead information will be described later.

The control signal is a signal for operating a controlled object, and is information indicating a power supply state, a current value, a voltage value, a pressure value, an operating state, or the like, or digital information such as a bit value or a byte value. Further, the detection signal and the control signal may be transaction processing in which the detection signal and the control signal are exchanged a certain number of times to operate the control target.

For example, when the transmission processing system 4 according to the present embodiment is applied to a transportation system, the terminal device 3 becomes a station service device. For example, station affairs equipment includes automatic ticket gates, automatic checkout machines, automatic ticket vending machines, and the like. When the terminal device 3 is an automatic ticket gate, for example, the detection signal is a wireless communication medium (for example, I
It is read information or the like read from the C card), and the control signal is a drive signal or the like of a gate that controls passage. The lead information in this case is at least one of the identification information of the wireless communication medium, the entry record (entrance station and entry date and time), the entry record (entry station and entry time), and the amount information.

Generally, in the case of an automatic ticket gate, a high-speed response of a control signal to a detection signal is required. Further, in the case of a cloud settlement system in which the terminal device 3 is an automatic settlement machine and the communication device 2 performs settlement processing, the detection signal is the read information read from the wireless communication medium, and the control signal is calculated from the read information. Information on the amount of shortage. The response of the control signal required by the automatic checkout machine may be slower than the response of the control signal required by the automatic ticket gate. It should be noted that the automatic ticket gate and the automatic checkout machine also include a case where a plurality of processes having different request times for response signals are executed.

In the transportation system, a large number of automatic ticket gates are installed in each region, a large number of detection signals are frequently transmitted from each of these many automatic ticket gates, and a large number of automatic checkout machines are installed in each region. A large number of detection signals are transmitted from each of a large number of automatic payment machines. The transmission processing system 4 according to the present embodiment can shorten the response time and perform real-time control in the traffic system under such conditions.

FIG. 2 is a block diagram showing an example of the functional configuration of each device in the transmission processing system 4 according to the first embodiment.

The terminal device 3 includes an input unit, a transmission unit, a reception unit, and an output unit. The input unit receives the detection signal from the control target. The transmission unit transmits the calculation request packet 50 generated based on the detection signal to the relay device 1. Further, the receiving unit receives the calculation response packet 51 from the relay device 1. The output unit outputs the calculation result 42 to the control target based on the calculation response packet 51.

The communication protocol in the communication between the terminal device 3 and the relay device 1 may be a highly reliable one having an acknowledgment such as TCP.

The relay device 1 includes a first receiving unit 10, a processing determination unit 11, a processing determination table 12, a calculation execution unit 13, a calculation method buffer 14, a calculation method request unit 15, a first transmission unit 16, and the like. The request standby buffer 17, the second receiving unit 18, the packet type determining unit 19, and the second transmitting unit 20.
And.

The first receiving unit 10 receives a packet such as a calculation request packet 50 for requesting a calculation process from the terminal device 3. The processing determination unit 11 receives the calculation request packet 50 received by the first reception unit 10.
It is determined whether or not the operation processing can be performed by the relay device 1 with reference to. Further, the processing determination unit 11 refers to the processing determination table 12 in order to determine whether or not the operation processing can be performed by the relay device 1.

Here, the processing determination table 12 will be described with reference to FIG. 3 in addition to FIG. Figure 3
Is a diagram showing an example of data recorded in the processing determination table 12 according to the first embodiment.

The processing determination table 12 is, for example, data (buffer data 3) indicating whether or not the calculation method 43 is stored in the calculation method buffer 14 in association with the calculation ID 31 of the calculation method 43.
2), the calculation time 33, the number of references 34, the size 35, and other data are recorded. again,
The processing determination table 12 may have a list structure for sequentially recording data, or a ring buffer structure for cyclically recording data. Further, the information of the processing determination table 12 may be stored in the calculation method buffer 14 and both may be integrated.

The calculation ID 31 is a number, a character, or a symbol assigned to identify the calculation method 43. The buffer data 32 records data indicating whether or not the calculation method 43 is stored in the calculation method buffer 14. For example, in the case of FIG. 3, 0 and 1 are used, and the calculation method 43
Is recorded as 1 if is stored in the calculation method buffer 14, and 0 if the calculation method 43 is not stored in the calculation method buffer 14. Although 0 and 1 are used in the figure as information for determining whether or not the calculation method 43 is stored in the calculation method buffer 14, the present invention is not limited to this.

The calculation time 33 indicates the time required when the calculation process is executed in the relay device 1. The reference number 34 indicates the number of times that the processing determination unit 11 refers to the buffer data 32 in the processing determination table 12. That is, the number of references 34 indicates the frequency of use or the ratio of use of each calculation method 43 used for the calculation request from the terminal device 3. The size 35 indicates the size 35 of the data of the calculation method 43.

The processing determination unit 11 refers to the buffer data 32 recorded in the processing determination table 12, and based on the buffer data 32, whether or not to execute arithmetic processing on the arithmetic request packet 50 received by the first receiving unit 10. Is determined. That is, the processing determination unit 11 refers to the processing determination table 12 to determine whether or not the calculation method 43 having the calculation ID 31 stored in the calculation request packet 50 is stored in the calculation method buffer 14, and performs the calculation. If the calculation method 43 having the calculation ID 31 stored in the request packet 50 is stored in the calculation method buffer 14, it is determined that the relay device 1 can perform the calculation process.

On the other hand, if the calculation method 43 having the calculation ID 31 stored in the calculation request packet 50 is not stored in the calculation method buffer 14, the relay device 1 determines that the calculation process is impossible.

Further, the processing determination unit 11 determines whether or not to request the calculation method 43 from the communication device 2 when the relay device 1 determines that the calculation processing is impossible. That is, the processing determination unit 11 determines whether or not the calculation method request unit 15 generates the calculation method request packet 52, for example, based on the number of references 34. Further, for determining whether or not to request the calculation method 43, for example, the number of references 34 recorded in the processing determination table 12 or the calculation method request standard using the size 35 may be used.

The calculation method requirement standard is a standard used for determining whether or not the calculation method 43 is requested from the communication device 2, and is an arbitrary condition set in advance. For example, the calculation method may be requested when the number of references 34 exceeds 10 times, or the calculation method 43 may be requested when the number of references 34 exceeds 10 times and the size 35 does not exceed 100 kB. Is also good.

That is, the calculation method requirement standard is the relay device 1 rather than executing the calculation process in the communication device 2.
It is a criterion for selecting the calculation method 43, which is assumed to be able to perform real-time control because the response time is shortened when the calculation process is executed by.

Further, the calculation method requirement standard may be stored in a storage unit (not shown) of the relay device 1, recorded in the processing determination table 12, and an item of whether or not the calculation method requirement standard is satisfied is added. Is also good.

The calculation execution unit 13 executes a calculation process for the calculation request packet 50 received by the first reception unit 10 based on the determination of the processing judgment unit 11. The calculation execution unit 13 is a calculation request packet 5
Based on the calculation ID 31 stored in 0, the corresponding calculation method 4 is performed from the calculation method buffer 14.
With reference to No. 3, the arithmetic processing is executed on the arithmetic data 41 stored in the arithmetic request packet 50. In addition, the calculation execution unit 13 generates a calculation response packet 51 for storing the calculation execution result.

The calculation method buffer 14 stores a calculation method 43 for arithmetically processing the calculation request packet 50 received by the first receiving unit 10. Further, when the second receiving unit 18 described later receives the calculation method 43, the calculation method 43 is newly stored. The calculation method buffer 14 may have a list structure for sequentially recording data, or a ring buffer structure for cyclically recording data.
The information of the processing determination table 12 may be stored in the calculation method buffer 14 and both may be integrated.

The calculation method request unit 15 makes a request for receiving the calculation method of the calculation process requested by the calculation request packet 50 received by the first reception unit 10 from the communication device 2. The calculation method request packet 52.
To generate. That is, the calculation method request unit 15 refers to the calculation ID 31 from the calculation request packet 50, and generates the calculation method request packet 52 for requesting the calculation method 43 from the communication device 2. Further, the calculation method request unit 15 transmits the generated calculation method request packet 52 to the first transmission unit 16, and stores the calculation request packet 50 in the request standby buffer 17.

The first transmission unit 16 transmits the packet to the communication device 2. The first transmission unit 16 transmits the calculation request packet 50 received from the processing determination unit 11 or the calculation method request packet 52 received from the calculation method request unit 15 to the communication device 2. For example, the first transmission unit 16 is the processing determination unit 1.
When 1 determines that the calculation method request packet 52 is not generated based on the number of references 34, the calculation request packet 50 received by the first receiving unit 10 is transmitted to the communication device 2.

The request standby buffer 17 requests the calculation method 43 from the communication device 2 for the calculation request packet 50.
Is temporarily stored. When the calculation method 43 is newly stored in the calculation method buffer 14,
The calculation execution unit 13 takes out the calculation request packet 50 in which the calculation ID 31 of the newly stored calculation method 43 is stored from the request standby buffer 17, and executes the calculation process. Further, the request standby buffer 17 may have a list structure for sequentially recording data, or a ring buffer structure for cyclically recording data.

The second receiving unit 18 receives the packet from the communication device 2. The second receiver 18, for example,
Based on the calculation method request packet 52 generated by the calculation method request unit 15, the calculation method reply packet in which the calculation method 43 is stored is received from the communication device 2.

The packet type determination unit 19 determines the packet type by referring to the packet ID 40 for identifying the packet type stored in the packet received by the second receiving unit 18.
For example, when the packet is an arithmetic response packet 51, the packet type determination unit 19 transmits the arithmetic response packet 51 to the second transmission unit 20. Further, for example, when the packet is the calculation method reply packet 53, the packet type determination unit 19 stores the calculation method 43 stored in the calculation method reply packet 53 in the calculation method buffer 14, and the buffer of the processing determination table 12 The data 32 is rewritten with data indicating that the calculation method 43 is stored in the calculation method buffer 14.

When transmitting the calculation execution content from the communication device 2 to the relay device 1, a program or reading that can be executed by both the relay device 1 and the communication device 2 such as a program execution file or a CSV (Comma-Separated Values) file. A compilation unit that compiles the source code of the program on the relay device 1 in order to avoid being limited to possible data files.
(Not shown) may be provided.

The second transmission unit 20 transmits the packet to the terminal device 3. The second communication unit transmits, for example, an arithmetic response packet 51 in which the arithmetic processing result of the arithmetic processing performed by the arithmetic execution unit 13 is stored to the terminal device 3.

The communication device 2 includes a communication device reception unit 21, a communication device packet type determination unit 22, a communication device calculation execution unit 23, a communication device calculation method buffer 24, a calculation method response unit 25, and a communication device transmission unit 26. To be equipped.

The communication device receiving unit 21 receives a packet such as a calculation request packet 50 or a calculation method request packet 52 from the relay device 1.

The communication device packet type determination unit 22 determines the packet type by referring to the packet ID 40 for identifying the packet type stored in the packet received by the communication device reception unit 21. For example, when the packet is the calculation request packet 50, the communication device packet type determination unit 22 transmits the packet to the communication device calculation execution unit 23. When the packet is the calculation method request packet 52, the communication device packet type determination unit 22 transmits the packet to the calculation method response unit 25.

The communication device calculation execution unit 23 refers to the corresponding calculation method 43 from the communication device calculation method buffer 24 based on the calculation ID 31 stored in the calculation request packet 50, and displays the calculation data 41 stored in the calculation request packet 50. On the other hand, the arithmetic processing is executed. Further, the communication device calculation execution unit 23 generates an calculation response packet 51 for storing the calculation execution result.

The calculation ID 31 and the calculation method 43 are stored in association with each other in the communication device calculation method buffer 24. The communication device calculation method buffer 24 may have a list structure for sequentially recording data, or a ring buffer structure for cyclically recording data.

The calculation method response unit 25 refers to the calculation ID 31 from the calculation method request packet 52, and duplicates the corresponding calculation method 43 from the communication device calculation method buffer 24. In addition, the calculation method response unit 2
5 generates a calculation method reply packet 53 storing the duplicated calculation method 43 and transmits it to the communication device transmission unit 26.

The communication device transmission unit 26 transmits a packet such as a calculation reply packet 51 or a calculation method reply packet 53 to the relay device 1.

Each function of the terminal device 3, the relay device 1, and the communication device 2 is a CPU (Central) connected by a bus.
It may be realized by software that uses a processing unit), memory, auxiliary storage device, etc., or it may be realized by ASIC (Application Specific Integrated Circuit) or PLD (Programmabl).
It may be realized by using hardware such as e Logic Device) or FPGA (Field Programmable Gate Array). Further, it may be realized by a combination of software and hardware.

The communication device 2 may be configured as a cloud server that is virtually constructed on the Internet and can dynamically increase or decrease resources such as a CPU and memory. The medium for storing the software of each device is the HDD (Hard Disc Drive) or SS built in the computer system.
It may be realized by using an auxiliary storage device such as D (Solid State Drive), or RAM (Rando).
It may be realized by using a main storage device such as m Access Memory).

Next, the configuration of each packet will be described with reference to FIGS. 4 to 7. The duplicated description will be omitted as appropriate. FIG. 4 is a diagram showing an example of the configuration of the calculation request packet 50 according to the first embodiment.

The calculation request packet 50 is a packet for requesting a calculation from the terminal device 3 to the communication device 2, and includes a field for storing the packet ID 40, a field for storing the calculation ID 31, and a field for storing the calculation data 41. ..

The packet ID 40 is a number or symbol for identifying the type of packet. Further, the packet ID 40 may use numbers, characters, and symbols not only for identifying the packet type but also for identifying individual packets.

The calculation ID 31 is a number, a character, or a symbol for identifying the calculation method 43. The arithmetic data 41 is data that is the target of arithmetic processing or data that is necessary for arithmetic processing.

FIG. 5 is a diagram showing an example of the configuration of the operation response packet 51 according to the first embodiment. The calculation response packet 51 uses the calculation result 42 executed by the communication device 2 or the relay device 1 as the terminal device 3.
It is a packet to be transmitted to, and includes a field for storing the packet ID 40 and a field for storing the calculation result 42. The calculation result 42 is the result of the calculation processing executed by the communication device 2 or the relay device 1.

FIG. 6 is a diagram showing an example of the configuration of the calculation method request packet 52 according to the first embodiment. The calculation method request packet 52 is a packet for the relay device 1 to request the calculation method 43 from the communication device 2, and includes a field for storing the packet ID 40 and a field for storing the calculation ID 31.

FIG. 7 is a diagram showing an example of the configuration of the calculation method response packet according to the first embodiment. The calculation method reply packet 53 is a packet for the communication device 2 to transmit the calculation method 43 to the relay device 1, and is a field for storing the packet ID 40, a field for storing the calculation ID 31, and a field for storing the calculation method 43. And. The calculation method 43 is a method for performing a calculation, such as a program.

For example, when the transmission processing system 4 is applied to the station affairs system and data communication related to the fare calculation processing is performed, the IDs of the entrance station and the exit station are stored in the calculation data 41, and the amount is stored in the calculation result 42. The fare calculation program is stored in the method. For transmission of the calculation method 43 such as a fare calculation program, the program may be stored in the calculation method 43, or FTP (Fil) may be stored.
Files may be transmitted using a file transfer protocol such as e Transfer Protocol) or FTPP (SSH File Transfer Protocol). When the program is transferred using the file transfer protocol, the file name is stored in the calculation method 43.

Next, the flow of determination performed by the processing determination unit 11 will be described with reference to FIG. FIG. 8 is a flowchart showing an example of a determination flow executed by the processing determination unit 11 according to the first embodiment.

First, the processing determination unit 11 determines whether or not the calculation request packet 50 has been received (step S100). When the processing determination unit 11 receives the calculation request packet 50 (step S1)
00, Yes), the calculation ID 31 stored in the calculation request packet 50 is referred to (step S101). On the other hand, when the calculation request packet 50 is not received (steps S100, N).
o) Return the process to the start step.

Next, the processing determination unit 11 determines whether or not the operation can be performed by the relay device 1 (step S10).
2). The processing determination unit 11 refers to the processing determination table 12, and data indicating whether or not the calculation method 43 associated with the calculation ID 31 referred to in step S101 is stored in the calculation method buffer 14 (buffer data 32). It is determined whether or not the calculation method 43 is stored in the calculation method buffer 14 with reference to.

If the calculation method 43 is stored in the calculation method buffer 14, the processing determination unit 11 determines that the relay device 1 can perform the calculation (step S102, Yes), and the calculation method 43 must be stored in the calculation method buffer 14. For example, it is determined that the relay device 1 cannot perform the calculation (step S).
102, No).

Further, when referring to the processing determination table 12, the processing determination unit 11 counts up the data of the number of references 34 associated with the calculation ID 31 referenced in step S101 (not shown). The function of counting up may be provided in the processing determination table 12 instead of the processing determination unit 11.

When the processing determination unit 11 determines that the relay device 1 can perform the calculation (step S102, Yes).
), The calculation request packet 50 is transmitted to the calculation execution unit 13 (step S103), and the process is terminated. On the other hand, when the processing determination unit 11 determines that the relay device 1 cannot perform the calculation (step S).
102, No), the data in the processing determination table 12 is referred to, and it is determined whether or not to request the calculation method 43 from the communication device 2 according to the calculation method request standard (step S104).

When the processing determination unit 11 determines that the calculation method 43 is requested according to the calculation method request standard (step S104, Yes), the processing determination unit 11 transmits the calculation request packet 50 to the calculation method request unit 15 and ends the processing (step S105). .. On the other hand, when the processing determination unit 11 determines that the calculation method 43 is not requested according to the calculation method request standard (step S104, No), the processing determination unit 11 transmits the calculation request packet 50 to the first transmission unit 16 and ends the processing.

According to the transmission processing system 4 of the first embodiment described above, the load on the communication device 2 can be reduced by executing a part of the arithmetic processing executed by the communication device 2 on the relay device 1. Further, the amount of communication between the relay device 1 and the communication device 2 can be reduced. As a result, the response time is excellently shortened, and real-time control can be performed.

(Embodiment 2)
Next, the second embodiment will be described. The same components as those in the first embodiment are designated by the same reference numerals, and duplicate description will be omitted as appropriate. The second embodiment has a configuration in which the load measuring unit 90 is added to the functional configuration of the relay device 1 shown in FIG.

FIG. 9 is a block diagram showing an example of the functional configuration of each device in the transmission processing system 4 according to the second embodiment. The load measuring unit 90 measures the load applied to the network between the relay device 1 and the communication device 2, and transmits the measurement result to the processing determination unit 11. The processing determination unit 11 makes the determination described in the first embodiment based on the network load data measured by the load measurement unit 90 in addition to the data in the processing determination table 12.

The load measurement unit 90 sets the communication time until the first transmission unit 16 transmits a packet such as a calculation request packet or a calculation method request packet, and the second reception unit 18 receives a packet that is a response to the packet. measure. Further, the load measuring unit 90 calculates the packet loss rate by measuring the communication time.

Therefore, when the processing determination unit 11 refers to the measurement data of the load measurement unit 90, the second reception is performed even if a certain time elapses from the time when the first transmission unit 16 transmits the packet, for example, 100 ms elapses. When the unit 18 does not receive the packet including the reply to the packet, it is determined that the packet is lost (packet loss). That is, the processing determination unit 11 has a communication time of 63.
Packets for which is not calculated are determined to be lost.

Here, the measurement data measured by the load measuring unit 90 will be described with reference to FIG.
FIG. 10 is a diagram showing an example of measurement data measured by the load measuring unit 90 according to the second embodiment. For example, the load measurement unit 90 associates the packet ID 40 with the time when the first transmission unit 16 transmits the packet (first transmission unit transmission time 61) and the second reception unit 18 includes a response to the packet. The reception time (second receiver reception time 62) is recorded.

In this case, the packet ID 40 includes a number or symbol for identifying the type of packet and a number, character or symbol for identifying each packet, and the packet transmitted by the first transmission unit 16 and a response to the packet. Packets containing are having numbers, letters, or symbols to identify the same individual packet.

Further, the load measuring unit 90 records the time calculated from the time difference between the first transmitting unit transmitting time 61 and the second receiving unit receiving time 62 as the communication time 63.

The processing determination unit 11 determines whether or not the calculation method request unit 15 generates the calculation method request packet 52 based on the communication time 63 measured by the load measurement unit 90. The processing determination unit 11 refers to the measurement data of the load measurement unit 90 when performing the determination in step S104 described with reference to FIG. For example, the processing determination unit 11 may determine whether or not to request the calculation method 43 from the communication device 2 based on at least one of the communication time 63 and the packet loss in addition to the calculation method request standard. ..

For example, the processing determination unit 11 may determine whether or not the calculation method 43 is requested from the communication device 2 based on whether or not the average value of the communication time 63 in a certain time exceeds the threshold value.

Further, for example, the processing determination unit 11 may determine whether or not to request the communication device 2 for the calculation method based on whether or not the packet loss rate in a certain time exceeds the threshold value.

Further, for example, the processing determination unit 11 uses the communication device 2 as a calculation method based on whether or not the average value of the communication time 63 in a certain time exceeds the threshold value and whether or not the packet loss rate in a certain time exceeds the threshold value. It may be determined whether or not the request is made to.

According to the transmission processing system 4 of the second embodiment described above, when the load related to the communication between the relay device 1 and the communication device 2 is large by measuring the load related to the communication between the relay device 1 and the communication device 2. The packet communication amount between the relay device 1 and the communication device 2 can be reduced, and as a result, the response time can be shortened and real-time control can be performed.

The processing in the transmission processing system 4 according to the above-described first and second embodiments can be executed by some software. Therefore, the above-mentioned processing can be easily realized only by installing and executing these programs in the relay device 1 through a computer-readable storage medium in which some programs for executing the above-mentioned processing procedure are stored. For example, the relay device 1 can download the above program via the network, store the downloaded program, and complete the installation of the program. Alternatively, the relay device 1 can read the program from the information storage medium, store the read program, and complete the installation of the program.

Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, as well as in the scope of the invention described in the claims and the equivalent scope thereof.
Hereinafter, the inventions described in the claims at the time of filing the application of the present application will be added.
[C1]
A relay device that relays communication between a terminal device and a communication device that performs a desired operation on a received packet.
A first receiving unit that receives an arithmetic request packet for requesting arithmetic processing from the terminal device,
An arithmetic method buffer that stores an arithmetic method for arithmetically processing an arithmetic request packet received by the first receiving unit, and an arithmetic method buffer.
A processing determination table in which buffer data indicating whether or not the calculation method is stored in the calculation method buffer is recorded, and
With reference to the buffer data recorded in the processing determination table, a processing determination unit that determines whether or not to execute arithmetic processing on the arithmetic request packet received by the first receiving unit based on the buffer data. ,
Based on the determination of the processing determination unit, the calculation execution unit that executes the calculation processing for the calculation request packet received by the first reception unit, and the calculation execution unit.
A second transmission unit that transmits an operation response packet in which the operation processing result processed by the operation execution unit is stored to the terminal device, and a second transmission unit.
A relay device equipped with.
[C2]
An arithmetic method requesting unit for generating an arithmetic method request packet for requesting to receive an arithmetic processing arithmetic method requested by the arithmetic request packet received by the first receiving unit from the communication device, and an arithmetic method requesting unit.
The first transmission unit that transmits the calculation method request packet generated by the calculation method request unit to the communication device, and
Based on the calculation method request packet, a second receiving unit that receives the calculation method reply packet in which the calculation method is stored from the communication device, and
The relay device according to [C1].
[C3]
The processing determination table further records the number of references indicating the number of times the buffer data has been referenced in association with the calculation ID for identifying the calculation method.
The processing determination unit determines whether or not the calculation method request unit generates the calculation method request packet based on the number of references.
The relay device according to [C2].
[C4]
When the processing determination unit determines that the calculation method request packet is not generated based on the number of references, the first transmission unit transmits the calculation request packet received by the first reception unit to the communication device.
The relay device according to [C3].
[C5]
The load measuring unit further includes a load measuring unit that measures the communication time until the first transmitting unit transmits a packet and the second receiving unit receives a packet that is a response to the packet.
The relay device according to [C4].
[C6]
The processing determination unit determines whether or not the calculation method request unit generates the calculation method request packet based on the communication time measured by the load measurement unit.
The relay device according to [C5].
[C7]
For a computer that operates as a relay device that relays communication between a terminal device and a communication device that performs a desired operation on a received packet.
A means for receiving an operation request packet for requesting an operation process from the terminal device, and
A means for storing the calculation method for processing the calculation request packet in the calculation method buffer, and
A means for recording buffer data indicating whether or not the calculation method is stored in the calculation method buffer in the processing determination table, and
A means for determining whether or not to execute arithmetic processing on an arithmetic request packet based on the buffer data by referring to the buffer data recorded in the processing determination table.
A means for executing arithmetic processing on the arithmetic request packet based on the determination, and
A means for transmitting an arithmetic response packet that stores an arithmetic processing result that has been arithmetically processed to a terminal device,
Transmission processing program to execute.

1 Relay device 2 Communication device 3 Terminal device 4 Transmission processing system 10 First receiving unit 11 Processing judgment unit 12 Processing judgment table 13 Calculation execution unit 14 Calculation method buffer 15 Calculation method request unit 16 First transmission unit 17 Request standby buffer 18th (Ii) Receiver 19 Packet type determination unit 20 Second transmission unit 21 Communication device reception unit 22 Communication device packet type determination unit 23 Communication device calculation execution unit 24 Communication device calculation method buffer 25 Calculation method Response unit 26 Communication device transmission unit 32 Buffer data 33 Calculation time 35 Size 41 Calculation data 42 Calculation result 43 Calculation method 50 Calculation request packet 51 Calculation reply packet 52 Calculation method Request packet 53 Calculation method Reply packet 61 First transmitter transmission time 62 Second receiver reception time 63 Communication time 90 Load measurement unit NW1 Local network NW2 Wide area network

Claims (7)

A relay device that relays communication between a terminal device and a communication device that performs a desired operation on a received packet.
A first receiving unit that receives an arithmetic request packet for requesting arithmetic processing from the terminal device,
An arithmetic method buffer that stores an arithmetic method for arithmetically processing an arithmetic request packet received by the first receiving unit, and an arithmetic method buffer.
A processing determination table in which buffer data indicating whether or not the calculation method is stored in the calculation method buffer is recorded, and
With reference to the buffer data recorded in the processing determination table, it is determined whether or not to execute the arithmetic processing on the arithmetic request packet received by the first receiving unit based on the buffer data, and the arithmetic processing is performed . Whether or not to request the calculation method of the calculation process requested by the calculation request packet received by the first receiving unit based on the calculation method request standard recorded in the processing judgment table when it is determined that the execution is impossible. a determination unit for determining,
An arithmetic execution unit that executes arithmetic processing for an arithmetic request packet received by the first receiving unit based on a determination that enables the arithmetic processing to be executed by the processing determination unit.
A second transmission unit that transmits an operation response packet in which the operation processing result processed by the operation execution unit is stored to the terminal device, and a second transmission unit.
Based on the determination that the processing determination unit makes it impossible to execute the arithmetic processing and the determination that the arithmetic method is not required, the first transmitter that transmits the arithmetic request packet received by the first receiver to the communication device. ,
A relay device equipped with. When the processing determination unit determines that the arithmetic processing cannot be executed and determines that the arithmetic method is requested, the communication performs the arithmetic processing arithmetic method requested by the arithmetic request packet received by the first receiving unit. Calculation method that makes a request to receive from the device Calculation method that generates a request packet The request unit and
The first transmission unit that transmits the calculation method request packet generated by the calculation method request unit to the communication device, and
Based on the calculation method request packet, a second receiving unit that receives the calculation method reply packet in which the calculation method is stored from the communication device, and
The relay device according to claim 1, further comprising. The processing determination table further records the number of references indicating the number of times the buffer data has been referenced in association with the calculation ID for identifying the calculation method.
The processing determination unit determines whether or not the calculation method request unit generates the calculation method request packet based on the number of references.
The relay device according to claim 2. When the processing determination unit determines that the calculation method request packet is not generated based on the number of references, the first transmission unit transmits the calculation request packet received by the first reception unit to the communication device.
The relay device according to claim 3. The load measuring unit further includes a load measuring unit that measures the communication time until the first transmitting unit transmits a packet and the second receiving unit receives a packet that is a response to the packet.
The relay device according to claim 4. The processing determination unit determines whether or not the calculation method request unit generates the calculation method request packet based on the communication time measured by the load measurement unit.
The relay device according to claim 5. For a computer that operates as a relay device that relays communication between a terminal device and a communication device that performs a desired operation on a received packet.
A means for receiving an operation request packet for requesting an operation process from the terminal device, and
A means for storing the calculation method for processing the calculation request packet in the calculation method buffer, and
A means for recording buffer data indicating whether or not the calculation method is stored in the calculation method buffer in the processing determination table, and
With reference to the buffer data recorded in the processing determination table, it is determined whether or not to execute the arithmetic processing on the arithmetic request packet based on the buffer data, and it is determined that the arithmetic processing cannot be executed. means for determining whether the operation request packet based on the calculation method required criteria to be recorded in the process determination table requires a calculation method of calculation processing requested if,
A means for executing arithmetic processing on the arithmetic request packet based on a determination that enables execution of arithmetic processing, and
A means for transmitting an arithmetic response packet that stores an arithmetic processing result that has been arithmetically processed to a terminal device,
A means for transmitting the calculation request packet to the communication device based on a judgment that the calculation processing cannot be executed and a judgment that does not require the calculation method.
Transmission processing program to execute.

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