JPH0553953A - Network connection processing device - Google Patents

Abstract

PURPOSE:To transmit/receive a telegraphic message and to hold the distribution of traffic without being conscious of the difference of a network and the existence of the network connection control processing device in the case of communication mutual between terminals on the various networks and communication for the terminals on the respective networks. CONSTITUTION:While holding the address information of the terminals connected onto the respective networks to which a network connection control processing device 10 is connected, transmission/reception control processing parts 11a and 11b compares and judges whether the address of a communicating party in the telegraphic message is same as the address of the terminal on the other network or not in the case of receiving the telegraphic message and when it is confirmed that those addresses are coincident, the response of an OSI at a layer-2 level is returned. The telegraphic message returning the response is dispatched to the transmission/reception control processing part of the telegraphic message on the other network and at the other transmission/reception control processing part to which the telegraphic message is dispatched, the telegraphic message is transmitted to the terminal having the same address as the address of the communicating party in the telegraphic message.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to communication between terminals on different networks and communication on the respective networks when physically different networks are connected so that the presence or absence of connected terminals can be confirmed at the layer 2 level of OSI. It relates to communication of terminals.

[0002]

2. Description of the Related Art A conventional technique will be described with reference to FIGS. 22 is a diagram showing an example of a network configuration to which the present invention is applied, FIG. 23 is a diagram showing an example of a message format when the network shown in FIG. 22 is an HBS, and FIG. FIG. 25 is a diagram showing an example of designating an address in a message when transmitting a message, and FIG. 25 is a diagram showing a configuration example of a network connection processing device according to a conventional technique.

A conventional example is shown by taking the case where the network shown in FIG. 22 is an HBS as an example. According to the standard, the HBS sends and receives a telegram 230 of the format shown in FIG. 23 on the control channel (for details of the meaning of each code, see EIAJ standard E).
See T-2101). The source address SA231,
Address DA232 of the other party, its address SA'233 when the sender is on another network (called a sub bus in HBS) connected via the network connection control device, and also on another network The electronic statement 230 includes the information of the address DA'234 when there is a destination. For example, it is assumed that both the network A 221a and the network B 221b in FIG. 22 are HBS. When exchanging a message having the configuration shown in FIG. 23 between terminals connected to the network A221a, the source address SA231 and the destination address DA232 are both the addresses of the terminals on the network A221a, and at this time, transmission on another network. Original address SA'2
33 and the destination address DA'234 are not necessary.

Now, the terminal Aa on the network A221a
A transmission / reception process between different networks according to the conventional example will be described by taking an example in which 222 sends a message to the terminal Ba 226 on the network B 221b. First, network A
The terminal Aa 222 on 221a needs to recognize the address (11H) of the terminal Ba 226, which is the recipient of the electronic message, and the address (FFH) of the network connection processing device 10. The terminal Aa 222 connects its own address code (01H) 241 as the source address SA and the address code (FFH) 242 of the network connection processing device 10 as the destination address DA on the same network by the network connection processing device 10. The address code (11
H) 244 is set as a telegram and transmitted to the network A 221a. In the network connection processing device 10 that has received this message, the message is transmitted / received by the transmission / reception control processing unit A251a.
Is passed to the self-addressed electronic message control processing unit A 252a via.
When confirming that the designation DA ′ indicating that it is a message to the terminal on the sub-bus is added in the received message, the message is passed to the gateway message control processing unit 253. In the gateway message control processing unit 253, the address code (01H) of the source address SA in the message is set as the source address code 247 on the sub bus, and the destination address code (11H) on the sub bus in the message is set. A telegram is set as the destination address code 256 on the same network, and the self-address code (FFH) is set as the source address to form a telegram.
1b is sent to the transmission / reception control processing unit B251b. In this way, messages have been exchanged between terminals on different networks.

In such a conventional example, when a message is transmitted from one terminal to another terminal, it is recognized whether the destination terminal is on the same network, the address of the destination terminal is recognized, If they are on different networks, the source terminal needs to retain a lot of information, such as recognition of the address of the network connection control processor, and if the two networks have the same specifications, they are initially the same. There is a problem that it is necessary to re-enter the information for transmission when the connection of the terminal connected to the network is changed to a different network.

[0006]

DISCLOSURE OF THE INVENTION The present invention is intended to solve the following problems based on the above-mentioned prior art. (1) When transmitting / receiving a message, the message can be transmitted / received without being aware of the fact that the partner terminal exists on a different network and the presence of the network connection control processing device. (2) It is possible to always obtain the latest information of the address of the terminal connected to each network to which the network connection processing device is connected. (3) The distribution of traffic, which is an advantage of different networks, can be measured (telegrams that do not need to be transmitted on different networks can be cut).

[0007]

As means for solving the first problem, the following network connection control processing device is provided. (1-1) Address information of terminals connected to each network to which the network connection control processing device is connected is held, and the transmission / reception control processing unit receives the destination address in the message on the other network when receiving the message. When it is confirmed that they match with each other, it is configured to return a response at the layer 2 level of OSI, and the message returning the response is a message on the other network. The transmission / reception control processing unit is configured to transmit the message to the terminal having the same address as the destination address in the message in the other transmission / reception control processing unit.

As means for solving the second problem, the following network control processing device is provided. (2-1) The transmission / reception control processing unit that transmits / receives a telegram to the network is set to the OS when the telegram is transmitted to the network.
When the delivery of I at the layer 2 level cannot be confirmed, the destination address in the transmission message is deleted from the connection terminal address storage unit. (2-2) A non-self-addressed message control processing unit that monitors a message on each network, wherein the non-self-addressed message control processing unit further includes a connection terminal address registration processing unit, and the connection terminal address The registration processing unit is configured to store the source address in the non-self-addressed message from the transmission / reception control processing unit of the first network in the address storage unit of the terminal connected to the first network. (2-3) In the non-self-addressed message control processing unit, the destination address of the message for which a normal reception (ACK) response at the layer 2 level of OSI is received by the message from the first network is set to the second network. When the value does not match the value stored in the connected connection terminal address storage unit, the value of the destination address is stored in the connection terminal address storage unit connected to the first network. (2-4) The terminal connection confirmation processing unit is a terminal address collection processing unit that executes address collection processing for all addresses, and a connection terminal that confirms connection of the terminals stored in the connection terminal address storage unit. From a confirmation processing unit, an address collection mode control processing unit that controls the processing of the address collection processing unit and the connection terminal confirmation processing unit, a mode setting unit that sets the address collection mode, and a self-addressed message control processing unit. A confirmation response message processing unit that activates either the terminal address collection processing unit or the connection terminal confirmation processing unit depending on the contents of the mode setting unit when a message is received, and the contents of the connection terminal address storage unit are temporarily transferred during confirmation work. And a connection terminal address confirmation memory unit for use. (2-5) The confirmation response message processing unit confirms the contents of the mode setting unit, and when the address collection processing unit and the connection terminal confirmation processing unit are in the active mode, activates the processing units of the specified modes. , When no processing unit is running,
The source address in the message is stored in the connected terminal address storage unit. (2-6) The address collection mode control processing unit includes a start control timer for starting the terminal address collection processing unit or the connected terminal confirmation processing unit, and a start control counter for counting the number of times the start control timer interrupt occurs.
When the activation control timer is interrupted, the activation control counter is counted up, and when the activation control counter does not overflow, the connected terminal confirmation processing unit is activated and the mode of the mode setting unit is set to the connected terminal confirmation processing unit in-operation mode. When the activation control counter overflows, the terminal address collection processing unit is activated and the mode of the mode setting unit is set to the terminal address collection processing unit activation mode, and the activation control counter is initialized. (2-7) The terminal address collection processing unit is provided with a processing end timer, and at the start of processing, the transmission / reception control processing unit is instructed to transmit a broadcast message for confirmation of the connected terminal, and then stored in the connected terminal address storage unit. After copying the connected terminal information stored in the connected terminal address confirmation memory, the timer is started, and when the timer overflows, it is confirmed whether or not the connected terminal address remains in the connected terminal address confirmation memory. If not, return the mode to the initial state, but if there is any remaining, start the connected terminal confirmation processing unit and set the mode of the mode setting unit to the connected terminal confirmation processing unit starting mode, and acknowledge before the timer overflows. When a message is passed from the message processing unit, the source address in the message is stored in the connected terminal address storage unit and then the connected terminal address is added. To restart the processing termination timer from to check for memory delete the setting of the source address. (2-8) The connection terminal confirmation processing unit has a confirmation response waiting timer, and at the start of the processing, the connection terminal information stored in the connection terminal address storage unit is copied to the connection terminal address confirmation memory before the connection is established. After requesting the transmission / reception control processing unit to send a connection confirmation message to the first address in the terminal address confirmation memory, store the destination address in the message in the confirmation requesting address storage unit. The timer for confirmation response is started from, and when the confirmation response timer overflows, the address stored in the confirmation requesting address storage unit is deleted from the connection terminal address confirmation memory and the connection terminal address storage unit, When the remaining address in the connected terminal address confirmation memory is not confirmed, the mode is returned to the initial state. When there are remaining addresses remaining in the authorization memory, a confirmation message is sent to the terminal at the next address to restart the confirmation wait timer, and the confirmation message is returned before the timer overflows. Sometimes the source address in the message is deleted from the connected terminal address backup storage unit and the mode is returned to the initial state when the remaining address in the connected terminal address confirmation memory is no longer confirmed. When the remaining address remains, the confirmation telegram is transmitted to the terminal of the next address and the confirmation response waiting timer is restarted.

As means for solving the third problem, the following network control processing device is provided. (3-1) In addition to the process of claim 4, before requesting the transmission of a message from the message transmission / reception processing unit of the first network to the message transmission / reception processing unit of the second network, the layer 2 of OSI is added.
Connection to the first network when the destination address of the telegram that received a normal reception (ACK) response at the level does not match the value stored in the connection terminal address storage unit connected to the second network After storing the value of the destination address in the terminal address storage unit, the message is discarded, and when they match, the message is requested to be sent to the message transmission / reception processing unit of the second network. (3-2) The non-self-addressed message control processing unit stores the source address in the non-self-addressed message from the transmission / reception control processing unit of the first network in the address storage unit of the terminal connected to the first network. A connection terminal address registration processing unit that stores the data in the first network, and a transmission determination processing unit that determines whether or not to transmit the message to the second network. When the destination address of the message from the transmission / reception control processing unit matches the value stored in the connection terminal address storage unit connected to the first network, the message is discarded, and when it does not match, the OSI corresponding to the message is discarded. Confirm whether there is a normal reception (ACK) response at the layer 2 level, discard the non-broadcast message with no response, and discard the other message with the second net. Sending a request to the message transmission and reception processing section of the chromatography click.

[0010]

With the above-mentioned means, the following actions are exerted in the mutual communication of physically different networks in which the presence / absence of a connection terminal can be confirmed at the layer 2 level of OSI. (1) In the transmission / reception of a message, it is possible to perform the transmission / reception of the message without being aware of the existence of the partner terminal on different networks and the presence of the network connection control processing device. (2) When the number of connected units is limited to the number of logical address spaces or less due to physical restrictions, the number of connected units can be provisionally increased. (3) The latest information of the terminal address connected on each network to which the network connection processing device is connected can always be obtained. (4) Traffic distribution, which is an advantage of different networks, is also measured.

[0011]

EXAMPLE An example of the present invention will be described with reference to FIGS. FIG. 1 is a diagram showing a first configuration example of a network connection processing device according to the present invention, FIG. 2 is a diagram showing a first configuration example of a non-self-addressed message control processing unit according to the present invention, and FIG. The figure which shows the 2nd structural example of a self-addressed message control processing part,
4 is a diagram showing a second configuration example of a network connection processing device according to the present invention, FIG. 5 is a diagram showing a configuration example of a terminal connection confirmation processing unit according to the present invention, and FIG. 6 is an address collection mode control process according to the present invention. FIG. 7 is a diagram showing a configuration example of a terminal address collection processing unit according to the present invention, FIG. 8 is a diagram showing a configuration example of a connection terminal confirmation processing unit according to the present invention, and FIG. The figure which shows the setting of the address of the transmission message from the terminal on one network to the terminal on the other network by this invention, FIG. 10: of the processing flow for the response return when a transmission / reception processing part received a message. FIG. 11 is a diagram showing an example, FIG. 11 is a diagram showing an example of a processing flow in the connection terminal address registration processing unit, FIG. 12 is a diagram showing an example of a first processing flow in the transmission determination processing unit, and FIG. 13 is a transmission determination process. Second processing flow in the department Illustrates an example, FIG. 14 is a diagram showing an example of a process flow during message transmission in the transmission and reception control unit,
15 is a diagram showing an example of a processing flow in the address collection mode control processing unit, FIG. 16 is a diagram showing an example of a processing flow in the attribute response message processing unit, and FIG. 17 is an attribute response reception in the terminal address collection control unit. 19 is a diagram showing an example of a processing flow at the time, FIG. 18 is a diagram showing an example of a processing flow at the time of the processing end timer overflow in the terminal address collection control unit, FIG.
FIG. 20 is a diagram showing an example of a processing flow at the time of receiving a confirmation response of the connection terminal confirmation control unit, FIG. 20 is a diagram showing an example of a processing flow at the time of overflow of the attribute response waiting timer of the connection terminal confirmation control unit, and FIG. 21 is a self-addressed message. It is a figure which shows an example of the processing flow of a control processing part.

An embodiment of the present invention will be described by taking as an example the case where both the network A 221a and the network B 221b shown in FIG. 22 are HBSs. According to the invention,
When the terminal Aa222 on the network A221a sends a message to the terminal Ba226 on the network B221b, the own address 01H is set as the source address SA231 as shown in FIG. 9 (91), and the terminal Ba226 is set as the destination address DA232. 11H is set (11), and the sub-bus source address SA'233 is set.
And sub bus destination address DA'234
No setting (93, 94) is sent.

At this time, in the network A transmission / reception control processing section 11a of the network connection processing device 10 for connecting the two networks, it is judged whether or not it is a broadcast message when the message is received (101). If there is no response, it is treated as no response (105), but since the above-mentioned telegram is a non-broadcast telegram, it is next determined whether it is a self-addressed telegram (1).
02). If it is a self-addressed message (a message in which the value stored in the self-address storage unit 12 matches the value of DA232 in the message), an ACK response is returned (107) and the message is passed to the self-addressed message control processing unit A14a. Since the message is a non-self addressed message, the following processing according to the present invention is performed. In the process according to the present invention, first, it is checked whether or not the address of the terminal specified by the destination address DA232 in the electronic message exists in the network B connection terminal address storage unit 13b (103). If the address exists, some response will be returned, but if the address does not exist, the non-response process (105) is performed. Terminal Ba specified in the message
Since 226 exists on the network B 221b, it performs a process of returning a response. When returning the response, it is further checked whether or not the address of the terminal specified by the transmission source address SA231 in the electronic message exists in the network B connection terminal address storage unit 13b (104). If the address exists, the NAK response indicating the address duplication is returned (106), and if it does not exist, the ACK response is returned (107). By this processing, terminals on different networks that actually exist at the level of OSI layer 2 can be controlled to be on the same network.

After such a series of response processing is completed, the electronic message is passed to the non-self addressed electronic message (monitor electronic message) control processing section A15a.
In the non-self addressed message (monitor message) control processing unit A15a,
The telegram from the network A transmission / reception control processing unit 11a is first passed to the network A connection terminal address registration processing unit 21. Network A connection terminal address registration processing unit 2
In 1, the transmission source address SA231 in the delivered message is registered in the network A connection terminal address storage unit 13a (111), and the message is delivered to the transmission determination processing unit 22 for the network B (112).

When the non-self addressed message control processing unit A15a has the first configuration example shown in FIG. 2, the transmission determination processing unit 22 to the network B confirms the response of the received message from the other party (121). , ACK response, it is further confirmed whether or not the destination address DA232 exists in the network A connection terminal address storage unit 13a (12
4) When it exists, the message is discarded because it is a message that is unnecessary for transmission to the network B 221b (12)
3). Destination address DA2 when ACK response is received
If 32 does not exist in the network A connection terminal address storage unit 13a, the message is passed to the network B transmission / reception control processing unit 11b (125). When there is no ACK response, it is judged whether it is a broadcast message (122), and when it is not a broadcast message, the message is discarded (123).
Further, when there is no ACK response and when it is a broadcast telegram, the telegram is sent to the network B transmission / reception control processing unit 11
Pass to b (125). By the processing of the present invention, only the necessary telegram is transmitted to the other network, and it is possible to suppress the increase of unnecessary traffic due to the connection of the two networks.

When the non-self-addressed message control processing unit A15a has the second configuration example shown in FIG. 3, the difference from the first configuration example is that the transmission determination processing unit 22 for the network B is further connected to the network B connection terminal. This is a point of accessing the address storage unit 13b. In the configuration example shown in FIG. 3, the following processing is added. After checking whether the destination address DA232 exists in the network A connection terminal address storage unit 13a (124), if it does not exist, whether the destination address DA232 further exists in the network B connection terminal address storage unit. It is confirmed whether or not (131). If it exists, the processing is the same as that described above, but if it does not exist, the address of the destination address DA232 in the message is stored in the network A connection terminal address storage unit (132) and then the Discard the message. By the processing of the present invention, it is possible to suppress an increase in unnecessary traffic caused by connecting two networks, and it is possible to maintain the latest terminal connection state on the network A 221a.

Network B transmission / reception control processing unit 11 receiving a message from transmission determination processing unit 22 for network B
In step b, a message is transmitted (141) and a response is awaited.
Check if there was an ACK response (142), then AC
When there is a K response, the destination address DA23 in the message
The address No. 2 is stored in the network B connection terminal address storage unit 13b (143), and the process is terminated. If there is no ACK response, check whether it is a broadcast message (144).
If it is a broadcast message, the process is terminated. If it is a non-broadcast message, it is confirmed whether or not the retransmission process is completed (145). The message transmission process is performed again. When the resend process is completed and there is no response and no broadcast, the address of the destination address DA is deleted from the network B connection terminal address storage unit (146). By the processing of the present invention, the latest terminal connection state on the network B 221b when connecting two networks can be held.

One of the points of the present invention is to retain the address on each network connected to the device, but in the first embodiment shown in FIG. The address of the connected terminal is based on the source address SA231 and the destination address DA232 in the telegram transmitted and received on each network. In this way, if there is a terminal that is connected but does not frequently output a message from itself, or does not receive a message frequently, for example, even if the terminal exists in the network connected by the device, It happens that you can't send and receive. Therefore,
As a second configuration example of the network connection processing device of the present invention, as shown in FIG. 4, a terminal connection confirmation processing unit A41a for confirming a terminal connected to the network A221a.
And a terminal connection confirmation processing unit B41b for confirming the terminals connected to the network B221b are added to the configuration shown in FIG. This terminal connection confirmation processing unit A41
Regarding the operations of a and B41b, an example will be shown in which the terminal connected to the network A221a is confirmed.

The terminal connection confirmation processing unit A41a is stored as a connection terminal in the terminal address collection processing unit 53, which periodically collects terminal addresses by broadcast, and the network A connection terminal address storage unit 13a. Collecting processing is performed by the connection terminal individual confirmation processing unit 54 that individually confirms the response from the terminal having the address that has not been collected by the address collecting processing. Which of the two processing units is being activated is indicated as a mode. When the terminal address collection processing unit 53 is being activated, it is in mode 2, when the connected terminal individual confirmation processing unit 54 is being activated, it is in mode 1, both are on standby. Mode 0 is set to the middle time.

The activation of the two processing units is performed by the address collection mode control processing unit 51. For the processing, the address collection mode control processing unit 51 holds the activation control timer 61. In the processing unit 51, the activation control timer 61
Overflows (timer interrupt), the terminal address collection processing unit 53 is activated (151), and the mode setting unit 5
The setting mode of 2 is set to mode 2 (152). As shown in FIG. 7, the terminal address collection processing unit 53 has a terminal address collection control unit 72 and a processing end timer 71, and at the time of activation from the address collection mode control processing unit 51, a message for connection confirmation response request (By the way, , HBS, HBS standard [ET-210]
1], there is an attribute request / response message, which can be used. ) Is the network A transmission / reception control processing unit 11
a, a content of the network A connection terminal address storage unit 13a is transferred to the connection terminal address confirmation memory 56, a processing end timer 71 is started, and a confirmation response from the confirmation response processing unit 55 is addressed to itself. Wait for

When the network A transmission / reception control processing unit 11a receives a telegram addressed to itself, the self-addressed telegram control processing unit A
Hand over the message to 14a. When receiving a message, the self-addressed message control processing unit A14a confirms whether or not it is a confirmation response message (21
1) If the message is a confirmation response message, the message is passed to the confirmation response message processing unit 55 of the terminal connection confirmation processing unit A41a (21
2). The confirmation response message processing unit 55 receives the confirmation response message from the self-addressed message control processing unit A14a, and sets the mode setting unit 5
It is confirmed whether or not the mode is 0 according to the contents of 2 (161). When the mode is 0, the address of the transmission source address SA231 in the electronic message is set to the network A connection terminal address storage unit 13a
(163) and the process ends. If it is not mode 0, it is confirmed whether or not it is mode 1 (162), and when it is mode 1, a message is passed to the connection terminal confirmation control unit 83 of the connection terminal confirmation processing unit 54 (164), and the processing ends. When neither mode 0 nor mode 1 is present, a message is passed to the terminal address collection control unit 72 of the terminal address collection processing unit 53 (165) and the process is terminated.

Upon receiving the confirmation response message, the terminal address collection controller 72 receives the source address SA231 in the message.
The address of the above is stored in the network A connection terminal address storage section (171), and the address is deleted from the connection terminal address confirmation memory 56 (172).
The processing end timer 71 is restarted (173).
In the terminal address collection control unit 72, the processing end timer 7
When 1 overflows, it is confirmed whether the address is still stored in the connected terminal address confirmation memory 56 (183), and if not stored, the mode is set to 0 (184) and the process is ended. However, if it is stored, the connection terminal individual confirmation processing unit 54 is activated (18
1), mode 1 is set in the mode setting unit 52 (182)
The process ends.

The connection terminal confirmation control unit 83 of the connection terminal confirmation processing unit 54 individually transmits a connection confirmation request message to the first address in the connection terminal address confirmation memory 56 at startup and waits for a confirmation response. Start the timer 81. When receiving a telegram of a telegram from the confirmation response telegram processing unit 55, the connection terminal confirmation control unit 83 stores the address of the source address SA231 in the telegram in the network A connection terminal address storage unit 13a (191) and confirms the connection terminal address. The setting deletion of the address is performed from the memory section 56 (192). After that, it is confirmed whether or not there is a remaining address in the connection terminal address confirmation memory unit 56 (193), and when there is no remaining address, the mode of the mode setting unit 52 is set to 0 (194), and the process is terminated. ,
If there is a remaining address, the confirmation request message for the next address is transmitted (195), and the confirmation response waiting timer 81 is restarted (196). The connection terminal confirmation control unit 83 did not receive a confirmation response when the confirmation response waiting timer 81 overflowed (requested a confirmation response now).
Connect the terminal address to the connected terminal address confirmation memory unit 56
(201), and also from the network A connection terminal address storage unit (202). After that, it is confirmed whether or not there is any remaining address in the connection terminal address confirmation memory unit 56 (203), and when there is no remaining address, the mode of the mode setting unit 52 is set to 0 (204), and the process is terminated. If there is a remaining address, the confirmation request message for the next address is sent (20
5) Restart the acknowledgment waiting timer 81 (2
06).

With the provision of the connection terminal confirmation processing unit 54, even if there is a terminal which is connected but does not frequently output a message from itself or does not receive a message frequently, the device of the present invention is used for connection. It can be confirmed that the terminal exists in the established network, and the message can be transmitted and received more accurately.

[0025]

According to the present invention, the following effects can be obtained in mutual communication of physically different networks in which presence / absence of a connection terminal can be confirmed at the layer 2 level of OSI. (1) When sending and receiving a message, it becomes possible to send and receive a message without being aware of the fact that the destination terminal is on a different network and the existence of the network connection control processing device, and the load on the terminal software is reduced. .. (2) When the number of connected units is limited to the number of logical address spaces or less due to physical restrictions, it is possible to tentatively increase the number of connected units without changing the communication specifications. The load on is reduced. (3) The latest information of the address of the terminal connected to each network to which the network connection processing device is connected can always be obtained, and the loss of control can be minimized. (4) Traffic distribution, which is an advantage of different networks, is achieved, and it is possible to easily realize a service with a traffic amount that cannot be realized with one network. (5) Especially in the HBS, both HBSs can operate as the main bus by using the HBS as a connecting device between the HBS by the coaxial control channel and the HBS by the pair line control channel. (6) Especially in HBS, table taps of control channels can be realized.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a network connection processing device according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of a non-self-addressed message control processing unit of an embodiment in the same device.

FIG. 3 is a configuration diagram of a non-self-addressed message control processing unit of a different embodiment in the same apparatus.

FIG. 4 is a configuration diagram of a network connection processing device according to another embodiment of the present invention.

FIG. 5 is a configuration diagram of a terminal connection confirmation processing unit of the embodiment in the same device.

FIG. 6 is a configuration diagram of an address collection mode control processing unit according to an embodiment of the device.

FIG. 7 is a configuration diagram of a terminal address collection processing unit of the embodiment in the apparatus.

FIG. 8 is a configuration diagram of a connection terminal confirmation processing unit of the embodiment in the same device.

FIG. 9 is an explanatory diagram of address setting of a transmission message from a terminal on one network to a terminal on another network according to the present invention.

FIG. 10 is a flow chart of response return processing when the transmission / reception processing unit receives a message.

FIG. 11 is a process flow chart in a connection terminal address registration processing unit.

FIG. 12 is a first processing flow chart in a transmission determination processing section.
To

FIG. 13 is a second processing flow chart in the transmission determination processing unit.
To

FIG. 14 is a process flow chart when a message is transmitted by the transmission / reception control processing unit.

FIG. 15 is a processing flow chart in the address collection mode control processing unit.

FIG. 16 is a process flow chart in the attribute response message processing unit.

FIG. 17 is a process flow chart when an attribute response is received by the terminal address collection control unit.

FIG. 18 is a processing flow chart when a processing end timer overflows in the terminal address collection control unit.

FIG. 19 is a flowchart of a process of receiving a confirmation response of the connection terminal confirmation control unit.

FIG. 20 is a process flow chart when the attribute response waiting timer of the connection terminal confirmation control unit overflows.

FIG. 21 is a processing flow chart of a self-addressed message control processing unit.

FIG. 22 is a diagram showing an example of a network configuration to which the present invention is applied.

FIG. 23 is a message format diagram when the network is HBS.

FIG. 24 is a diagram showing an example of designation of an address in a transmission message in the conventional device.

FIG. 25 is a block diagram of a conventional network connection processing device.

Claims (12)

[Claims] 1. A first network for connecting a plurality of terminals via a first transmission path to communicate with each other, and a second network for connecting a plurality of terminals via a second transmission path to communicate with each other. A first transmission / reception control processing unit that performs communication processing on the first network and a second transmission / reception control that performs communication processing on the second network between the first and second networks. A processing unit, a first connection terminal address storage unit that holds an address of a terminal connected to the first network, and a second connection that holds an address of a terminal connected to the second network A terminal address storage unit, a self-address storage unit that holds its own address, and a message reception for an address that is connected to the first transmission / reception control processing unit and is stored in the self-address storage unit. A first self-addressed message control processing unit for performing the above process, and a second self-addressed device for performing a process at the time of receiving a message addressed to an address connected to the second transmission / reception control processing unit and stored in the own address storage unit. A message control processing unit, a first non-self-addressed message control processing unit that is connected to the first transmission / reception control processing unit and performs a process at the time of receiving a message other than a self-address, and a second transmission / reception control processing unit. A second non-self-addressed message control processing unit that performs a process at the time of receiving a message that is connected and is not addressed to its own address; The addresses set in the self-address storage unit and the second connection terminal address storage unit are compared, and a response at the layer 2 level of OSI is returned when the coincidence is confirmed, and the second transmission / reception control processing unit also transmits a message during the message reception processing. Network connection having a function of comparing the other party's address with the addresses set in the self address storage section and the first connection terminal address storage section and returning a response at the layer 2 level of OSI when a match is confirmed. Processing equipment. 2. A transmission / reception control processing unit for transmitting / receiving a telegram to / from a network in which a plurality of terminals are connected by a transmission path and communicate with each other, and when the telegram is transmitted to the network, the delivery at the layer 2 level of OSI is performed. The address of the other party in the transmission message is deleted from the connection terminal address storage unit when the confirmation cannot be made.
The network connection processing device described. 3. A first transmission / reception control processing unit for transmitting / receiving a telegram to / from a first network in which a plurality of terminals are connected by a transmission path and communicate with each other, Monitoring, and when the destination address in the telegram is one of the addresses stored in the second connected terminal address storage unit storing the address of the terminal connected to the second network, 2. The network connection processing device according to claim 1, wherein reception of OSI at a layer 2 level is confirmed for a message. 4. The non-self-addressed message control processing unit stores the source address in the non-self-addressed message from the transmission / reception control processing unit of the first network in the address storage unit of the terminal connected to the first network. The network connection according to claim 1, further comprising: a connection terminal address registration processing unit that stores the data in a storage device, and a transmission determination processing unit that determines whether or not to transmit the message to the second network. Processing equipment. 5. The transmission determination processing unit matches the destination address of the message from the transmission / reception control processing unit of the first network with the value stored in the connection terminal address storage unit connected to the first network. When it does, the message is discarded, and when they do not match, the presence or absence of a normal reception (ACK) response at the layer 2 level of OSI for the message is confirmed, and the non-broadcast message is discarded when there is no response. The network connection processing device according to claim 4, wherein the other electronic message is requested to be sent to an electronic message transmission / reception processing unit of the second network. 6. The transmission determination processing unit, in addition to the processing of claim 4, before requesting a transmission of a message from the message transmission / reception processing unit of the first network to the message transmission / reception processing unit of the second network, an OSI layer Normal reception at 2 levels (AC
K) When the destination address of the response message does not match the value stored in the connection terminal address storage unit connected to the second network, the connection terminal address storage unit connected to the first network stores the address. The network connection processing device according to claim 4, wherein the message is discarded after the value of the destination address is stored, and when the message matches, the message is requested to be transmitted to the message transmission / reception processing unit of the second network. 7. An address of a terminal connected to the first transmission / reception control processing unit and the first self-addressed message control processing unit and connected to the first network is collected and confirmed at a constant time interval.
Connected to the first terminal connection confirmation processing unit, which confirms and updates the contents of the connected terminal address storage unit, the second transmission / reception control processing unit, and the second self-addressed message control processing unit, 2. A second terminal connection confirmation processing unit that collects and confirms addresses of terminals connected to the network and confirms and updates the contents of the second connected terminal address storage unit. The network connection processing device described. 8. The terminal connection confirmation processing unit is a terminal address collection processing unit that executes address collection processing for all addresses, and a connection terminal that confirms connection of terminals stored in the connection terminal address storage unit. From the confirmation processing unit, the address collection processing unit and the address collection mode control processing unit that controls the processing of the connection terminal confirmation processing unit, the mode setting unit that sets the address collection mode, and the self-addressed message control processing unit. A confirmation response message processing unit that activates either the terminal address collection processing unit or the connection terminal confirmation processing unit depending on the contents of the mode setting unit when a message is received, and the contents of the connection terminal address storage unit are temporarily transferred during confirmation work. 8. The network connection processing device according to claim 7, further comprising a memory unit for confirming a connection terminal address to be used for the same. 9. The confirmation response message processing unit confirms the contents of the mode setting unit, and activates the processing unit of the designated mode when the address collection processing unit and the connection terminal confirmation processing unit are in the active mode. 9. The network connection processing device according to claim 8, wherein the source address in the message is stored in the connection terminal address storage unit when none of the processing units is activated. 10. The address collection mode control processing unit includes a start control timer for starting a terminal address collection processing unit or a connection terminal confirmation processing unit, and a start control counter for counting the number of times the start control timer interrupt occurs. When the activation control timer is interrupted, the activation control counter is counted up, and when the activation control counter does not overflow, the connected terminal confirmation processing unit is activated and the mode of the mode setting unit is set to the connected terminal confirmation processing unit in-operation mode. When the activation control counter overflows, the terminal address collection processing unit is activated, and the mode of the mode setting unit is set to the terminal address collection processing unit activation mode, and then the activation control counter is initialized. The network connection according to claim 8. Subsequent processing equipment. 11. The terminal address collection processing unit includes a processing end timer, and at the start of the processing, the transmission / reception control processing unit is instructed to transmit a broadcast message for confirmation of the connected terminal and then stored in the connected terminal address storage unit. The connected terminal information is copied to the connected terminal address confirmation memory, and then the timer is started. When the timer overflows, it is confirmed whether or not the connected terminal address remains in the connected terminal address confirmation memory and it does not remain. In this case, if the mode is returned to the initial state, the connected terminal confirmation processing unit is started and the mode of the mode setting unit is set to the connected terminal confirmation processing unit starting mode, and the confirmation response message is sent before the timer overflows. When a message is passed from the processing unit, the source address in the message is stored in the connection terminal address storage unit and then the connection terminal 9. The network connection processing device according to claim 8, wherein the processing end timer is restarted after the setting of the transmission source address is deleted from the address confirmation memory. 12. The connection terminal confirmation processing unit includes a confirmation response waiting timer, and at the start of processing, the connection terminal information stored in the connection terminal address storage unit is copied to a connection terminal address confirmation memory before the connection terminal is confirmed. After sending the transmission confirmation message to the first address in the address confirmation memory to the transmission / reception control processing unit, the destination address in the message is stored in the confirmation requesting address storage unit. When the confirmation response waiting timer overflows, the address stored in the confirmation requesting address storage unit is deleted from the connection terminal address confirmation memory and the connection terminal address storage unit when the confirmation response waiting timer overflows. When the remaining address in the terminal address confirmation memory is not confirmed, the mode is returned to the initial state. When there are remaining addresses in the confirmation memory, the confirmation message is sent to the terminal at the next address to restart the confirmation wait timer, and the confirmation message is returned before the timer overflows. In this case, the transmission source address in the message is deleted from the connected terminal address backup storage unit, and when the remaining address in the connected terminal address confirmation memory is not confirmed, the mode is returned to the initial state. 9. The network connection processing device according to claim 8, wherein when there are remaining addresses remaining in the memory, a confirmation telegram is transmitted to the terminal having the next address to restart the confirmation response waiting timer.