JPH05227163A - Repeating control system - Google Patents

Abstract

PURPOSE:To shorten the retrieval processing time for repeating processing by selecting and registering one path to register the replied path information and address information. CONSTITUTION:Based on the address value of the destination address section of an incoming search telegraph, repeaters 11(n-1)n selects one of the search telegraphs to register the content of the path information in a storage section 15. Then the address value of the repeater 1112 is set to the destination address section of the information telegraph as a response for the search telegraph, sets the address value of the repeater at the sending source address, sets the path registered in the storage section to the path information section, and sets the address value of communication equipments 6n1-61nm housed in a communication system 60n to the information section, which is transmitted to the communication system passing it to the path information section along the recorded path. Then a coupling device 12 repeats only when a mark show passing self coupling device exists in the pathe information section, and disuses the information telegram when not exists.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a relay control system in a relay device installed at a connection point of a communication system including a transmission system accommodating a communication device and a transmission system executing only relaying.

[0002]

2. Description of the Related Art FIG. 6 is a block diagram showing the overall configuration of a conventional communication system. In the figure, individual communication systems 60 ₁ , ..., 60 _n are respectively connected to communication devices 61 ₁₁ ....
61 _{1 m,} ..., accommodates 61 _n1 to 61 _nm, each of the communication systems the relay device 62 _12, ..., it is connected via the 62 _{(n1) n.} The communication devices 61 _{11 to} 61 _1m are communication systems 60.
₁ shows m communication devices accommodated in ₁ , and the relay device 62 ₁₂
Indicates that it is placed at the junction between the communication system 60 ₁ and the communication system 60 ₂ . The same applies to the notations of other communication devices and relay devices. Each relay device 62
Is composed of transmission / reception units 63 and 64 for performing transmission / reception processing with the communication systems on both sides to be coupled, and a storage unit 65 for separately registering address values of all communication devices on the input / output side.

The relay operation in communication from the communication device 61 ₁₁ accommodated in the communication system 60 ₁ to the communication device 61 _nm accommodated in the communication system 60 _n will be described below. The message sent from the communication device 61 ₁₁ reaches the other communication devices 61 _{12 to} 61 _1m and the relay device 62 ₁₂ accommodated in the communication system 60 ₁ . Here, since the destination of the message is the communication device 61 _nm accommodated in the communication system other than the communication system 60 ₁ , it is not registered in the input side of the storage unit 65 of the relay device 62 ₁₂ . At that time, the relay device 62 ₁₂ examines the output side of the storage unit 65, and if there is an address value indicating the communication device 61 _nm , the telegram is transmitted to the transmission system of the next communication system 60 ₂ via the transmission / reception unit 64. Send out. The telegrams thus relayed one after another finally reach the communication device 61 _nm accommodated in the communication system 60 _n via the relay device 61 _{(n-1) n} .

[0004]

By the way, since the storage unit 65 of each relay device 62 needs to register the address value of the communication device accommodated in each communication system, it is large depending on the scale of the communication system. Capacity was needed. In addition, since the destination of the electronic message is collated in the storage unit 65 of each relay device 62 for each relay process, the number of collations of the entire communication system becomes the maximum number of all the communication devices belonging to it, which is a major factor that causes transmission delay. Was becoming.

Further, this is not only a problem of the relay processing performance, but also affects the superiority and inferiority of the design of the entire communication system such as how to optimally arrange the relay devices.
Therefore, the design and construction of the communication system must rely on a skilled person, which causes a problem that the construction cost of the communication system and the cost for changing the communication system increase.

The present invention is applicable to relay processing in an entire communication system including a relay apparatus which is connected to a communication system accommodating a communication apparatus to perform relay processing with another communication system, and a coupling apparatus which couples the communication systems. An object of the present invention is to provide a relay control method capable of shortening the processing time of the related search and improving the relay processing capacity.

[0007]

According to the present invention, a storage means for registering address information of a communication device accommodated in each communication system, and a search for finding a shortest path for transmitting the address information to another communication system. Sends a message, selects and registers one of the routes obtained from the reached search message, and returns the route information and the address information of the communication device accommodated in the communication system to the source of the search message. In addition, route search means for registering the returned route information and address information, and at each relay point through which the search telegram passes, as route information to the search telegram, a mark unique to each relay point is added and transmitted, Further, it is characterized in that it is provided with a coupling means for passing only a message having a unique mark among the messages relayed based on the route information.

[0008]

According to the present invention, when the route searching means of the relay device sends a search message to the relay device of each communication system and the search message reaches the relay device of the target communication system through each coupling means. , Store the route information up to that point. That is, in the present invention, by adding a mark unique to each relay point as route information to the search message at each relay point, this can be achieved. The relay device receiving this search message informs the route information to the transmission source relay device. Further, by performing this search for all the relay devices, it is possible to automatically register the relay route for each relay device.

After that, each relay device extracts the route information corresponding to the destination of the received electronic message, and the coupling means at each relay point performs the relay process while determining the presence or absence of the mark included in the route information, thereby performing the route processing. The telegram can be relayed according to the information.

[0010]

FIG. 1 is a block diagram showing the configuration of a first embodiment of the entire communication system to which the relay control system of the present invention is applied.

In the figure, individual communication systems 60 ₁ ,
..., 60 _n are communication devices 61 _{11 to} 61 _1m , ..., respectively.
61 _{n1 to} 61 _nm are accommodated, and each communication system includes the relay device 1
_{1 12, ..., 11 (n} -1) n or coupling device 12 _pq, are connected ... through. Note that the communication devices 61 _{11 to} 61 _1m represent _m communication devices accommodated in the communication system 60 ₁ , and the relay device 11 ₁₂ represents the communication system 60 ₁ and the communication system 60 _1.
It is shown to be placed at the junction between the _two and the coupling device 12
_pq indicates that it is placed at the junction between communication system 60 _p and communication system 60 _q . The same applies to the notations of other communication devices and relay devices.

Each relay device 11 includes transmission / reception units 13 and 14 for performing transmission / reception processing with the communication systems on both sides to be coupled, and a storage unit 15 for registering information (details will be described later) necessary for the relay processing of the present invention. It is composed of Each coupling device 12
Is a transmission / reception unit 13 and 14 that performs transmission / reception processing with the communication systems on both sides to be connected, and a mark indicating that the received search message has passed through the combination device, and an information message to which the mark is attached. Judgment unit 16 for making relay judgment
Composed of and.

Here, a search telegram 20 used in the relay control system of the present invention, an information telegram 30 used for exchanging information between relay devices, and a general communication telegram 40 used between the relay device and the communication device. Each frame configuration will be described with reference to FIGS. 2, 3, and 4, respectively.

In FIG. 2, the frame of the search message 20 is composed of a header portion 21, a destination address portion 22, a source address portion 23, a route information portion 24, an information portion 25 and a check portion 26 which are added as necessary. To be done.

In FIG. 3, the frame of the information telegram 30 is composed of a header part 31, a destination address part 32, a source address part 33, a route information part 34, an information part 35 containing actual communication information, and a check part 36. It

In FIG. 4, the frame of the communication message 40 is composed of a header part 41, a destination address part 42, a source address part 43, an information part 45 containing actual communication information, and a check part 46.

A relay operation according to the present invention will be described below when communicating from the communication device 61 ₁₁ accommodated in the communication system 60 ₁ to the communication device 61 _nm accommodated in the communication system 60 _n . However, as a premise, the storage unit 15 of the relay device 11 ₁₂ stores the address values of the communication devices 61 _{11 to} 61 _1m accommodated in the communication system 60 ₁ .
The address value of the communication device accommodated in the other communication system is the same as that written in the route information unit 34 of the information telegram 30 used between the relay devices determined by the search telegram 20, and each information It is stored in units. Also,
The mark added to the route information section 24 of the search message 20 when passing through the coupling device 12 interposed between the relay devices is unique in the entire communication system.

First, the procedure for storing the address values of the communication devices 61 _{11 to} 61 _1m accommodated in the communication system 60 ₁ in the storage unit 15 of the relay device 11 ₁₂ will be described. The communication devices 61 _{11 to} 61 _1m set the address value of the relay device 11 ₁₂ in the destination address part 42 of the communication message 40 sent when entering the communication system 60 ₁ , and the source address part 43
Set the address value of the communication device to. Relay device 11
_{In the case of 12} , if the own address value is written in the destination address part 42 when the communication message 40 arrives, naturally there is no source address value in the storage part 15, so it is in the source address part 43. Register the address value. Since the communication message 40 is for registering the address value, the relay process is not executed like the communication in the same communication system.

As described above, the address value of the newly entered communication device is stored in the storage unit 15 of the relay device 11 ₁₂ by receiving the address value of the source address unit 43 of the communication telegram 40. Registered as a communication device.

Next, the relay device 11 ₁₂ which has registered the address values of the communication devices 61 _{11 to} 61 _1m accommodated in the communication system 60 ₁ searches for a relay route and registers the address value corresponding to the route. To do. Repeater 11 ₁₂
So every time there is a change in the communication device accommodated in the preset time interval or the communication system _601, a search message 20 via the transmission and reception unit 14 to set the path between the relay apparatus, the communication system 60 ₁ To the communication system 60 ₂ other than the above. This operation is repeated by the number of combinations of relay devices.

Here, the relay device 11 ₁₂ is the relay device 11 _12.
In order to set a route to _{(n-1) n} , the address value of the relay device 11 _{(n-1) n} is set in the destination address part 22 of the search message 20 and the relay is set in the source address part 23. The address value of the device is set and sent to a communication system other than the communication system 60 ₁ . When the search message 20 passes through the coupling device 12 _pq , the determination unit 16 checks the route information unit 24 of the search message 20. If there is no mark indicating that the search message 20 has passed through the coupling device 12 _pq , the input side is detected. Communication system 60
_p identifier p, and sends to the communication system 60 _q writes an identifier q of all communication systems only mark x, and the output side of the communication system 60 _q indicating that it has passed through the coupling device 12 _pq. Also, when the determination unit 16 of the coupling device 12 _{pq examines} the route information unit 24 of the search telegram 20 and there is a mark x indicating that the coupling device 12 has passed through this coupling device, it means that the route forms a loop. Therefore, the search message 20 is discarded.

The search message 20 Such an operation is comprised in reaching the relay device 11 _{(n-1) n} to be any object, the search message 20 to reach the relay unit 11 _{(n-1) n} There may be more than one. This indicates that it is possible to take a plurality of different routes depending on the coupling device or the like. Therefore, in the relay device 11 _{(n-1) n} , based on the address value of the destination address part 22 of the arriving search message 20, from among the plurality of search messages 20 addressed to the own relay device,
Select the one that is most convenient (eg, the one that arrives earliest, or the one that has the fewest coupling devices in the path),
The contents of the route information section 24 are registered in the storage section 15.

Then, in the relay device 11 _{(n-1) n} , the address value of the relay device 11 ₁₂ is set in the destination address part 32 of the information message 30 as a response of the search message 20 and the source address part 33 is set in the source address part 33. The address value of the relay device is set, the route registered in the storage unit 15 is further set in the route information unit 34, and the address values of the communication devices 61 _{n1 to} 61 _nm accommodated in the communication system 60 _n are set in the information unit 35. It is set and sent to a communication system capable of flowing along the route recorded in the route information section 34. This information telegram 30 will be routed through the coupling device 12 similarly to the search telegram 20, but the coupling device 12 relays only when there is a mark in the route information section 34 indicating that it has passed through its own coupling device. If not, the information telegram 30 is discarded. By this operation, the information telegram 30 flows on the route registered in the relay device 11 _{(n-1) n} and reaches the target relay device 11 ₁₂ . In this case, unlike the case of the search telegram 20, only one reaches the relay device 11 ₁₂ .

In the relay device 11 ₁₂ , the received information message 3
The contents of the source address unit 33 (address value of the final relay device) of 0, the contents of the route information unit 34 (shortest route information), and the contents of the information unit 35 (address value of the communication device accommodated in the final relay device) It is stored in the storage unit 15. Further, as in the case of the relay device 11 _{(n-1) n} , the address values of the communication devices 61 _{11 to} 61 _1m accommodated in the communication system 60 ₁ are set in the information section 35 of the return information telegram 30. , To a communication system capable of flowing along the route recorded in the route information section 34. Thereby, the relay device 11
_{Even in (n-1) n} , the communication device 6 accommodated in the communication system 60 _1.
Address values of 1 _{11 to} 61 _1m can be registered.

The above operation determines the route between the relay devices.
Then, the route is registered in each relay device. This process
After passing, the relay process of the actual communication message 40 is started.
It Communication device 61₁₁Is the destination address part of the communication message 40
42 to communication device 61_nmSet the address value of
The address value is set in the dress section 43, and the information section 45 is set.
Communication contents 60 by setting the contents of the message to communicate₁Sent to
To do. Relay device 11 ₁₂Receives this communication message 40
And is the destination of this communication message 40 in the storage unit 15.
Communication device 61_nmThe address value of the
The relay route of the communication telegram 40 according to the recorded information
To decide. Relay device 11₁₂Here is a new information telegram
In the destination address section 32 of 30, the communication device 61_nmAddress of
A value is set, and the communication device 61 is set in the source address section 33.₁₁of
The route determined by setting the address value in the route information section 34
The information is set, and the information part 35 has the information part 45 of the communication telegram 40.
Communication system 6 according to the route information
0₂It is sent to the side via the transmitting / receiving unit 14.

A coupling device 1 is provided on the way of the information telegram 30.
When there is 2, the determination unit 16 of the coupling device examines the route information unit 34 of the information telegram 30, and only when there is a mark indicating the coupling device, the determination is made on the communication system side indicated by the route information unit 34. The communication message 30 is transmitted. Information message 30 in this way, the relay device 11 _(n-1) is connected to the communication system 60 _n for accommodating the communication device 61 _nm, which is the final goal _n
To reach. In the relay device 11 _{(n-1) n} , the information telegram 3
Since 0 is the final stop, communication message 40
The address value of the communication device 61 _nm is set in the destination address part 42 of the communication device 61, the address value of the communication device 61 ₁₁ is set in the source address part 43, and the information part 3 of the information telegram 30 is set in the information part 45.
5 is set and transmitted to the communication system 60 _n side, the communication message 40 is transmitted to the target communication device 61.
reach _nm .

Thus, in the relay control system of the present invention,
Since the relay route to the target communication system is automatically determined in advance, the time required for the relay process in the entire communication system can be significantly shortened and the processing capability can be improved.

FIG. 5 is a block diagram showing the configuration of a second embodiment of the entire communication system to which the relay control system of the present invention is applied. The feature of this embodiment is that the relay device 51 has both functions of the relay device 11 and the coupling device 12 shown in the first embodiment. That is, the relay device 51 includes the transmission / reception units 13 and 14, the storage unit 15, and the determination unit 1 shown in the first embodiment.
6 is provided. Therefore, when the information telegram 30 reaches the relay device 51, if there is a mark indicating that the route information section 34 is examined and the relay device 51 is passed, the same operation as that of the coupling device 12 shown in the first embodiment is performed. I do. Further, if the search message 20 or information message 30 addressed to the relay device 51, the same operation as the relay device 11 shown in the first embodiment is performed.

With such a configuration, in addition to the effect of the configuration of the first embodiment, it is not necessary to distinguish between the relay device and the coupling device, so that the design and construction of the communication system by making the configuration devices uniform. -It is possible to realize a significant reduction in maintenance costs and other costs.

[0030]

As described above, according to the present invention, only the relay device connected to the communication system accommodating the communication device stores the address information of the communication device, and in the coupling device only relaying the message, the message is transmitted. Since it suffices to have only the function of determining whether or not to relay, the storage capacity of the entire communication system can be significantly reduced. Further, since the coupling device performs routing according to the route information, the relay processing time can be significantly shortened.

Therefore, it is possible to improve the relay processing capability, eliminate the need to consider the relay route and the like in the design, and construct a communication system that can flexibly cope with a large scale and high traffic at low cost. it can.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a first embodiment of an entire communication system to which a relay control method of the present invention is applied.

FIG. 2 is a diagram showing a frame structure of a search message 20.

FIG. 3 is a diagram showing a frame configuration of an information telegram 30.

FIG. 4 is a diagram showing a frame configuration of a communication message 40.

FIG. 5 is a block diagram showing a second embodiment configuration of the entire communication system to which the relay control method of the present invention is applied.

FIG. 6 is a block diagram showing an overall configuration of a conventional communication system.

[Explanation of symbols]

 11 Relay Device 12 Coupling Device 13, 14 Transmission / Reception Unit 15 Storage Unit 16 Judgment Unit 20 Search Telegram 30 Information Telegram 40 Communication Telegram 21, 31, 41 Header Part 22, 32, 42 Destination Address Part 23, 33, 43 Source Address Part 24,34 Route information part 25,35,45 Information part 26,36,46 Check part 51 Relay device 60 Communication system 61 Communication device 62 Relay device 63,64 Transmission / reception part 65 Storage part

Claims (1)

[Claims] 1. A storage unit for registering address information of a communication device accommodated in each communication system, and a search message for sending a search message for finding a shortest route for transmitting the address information to another communication system to arrive at the search. One of the routes obtained from the message is selected and registered, the route information and the address information of the communication device accommodated in the communication system are returned to the originator of the search message, and the returned route information is also returned. And route search means for registering the address information, and at each relay point through which the search message passes, as a route information, a mark unique to each relay point is sent to the search message, and the route is relayed based on the route information. And a coupling means for allowing only a message having a unique mark to pass therethrough.