JPH08139748A - Broadcast communication processing method for store-and-forward switching device - Google Patents

Abstract

PURPOSE: To perform effective transmission of messages by providing a constitution where each store-and-forward switching device receives the broadcast communication messages addressed to all store-and-forward switching devices and then transfers the received messages to all the adjacent store-and-forward switching devices excluding the one that transmitted the messages. CONSTITUTION: An originating store-and-forward switching device 4 adds 1 to the number, e.g. 4010 that is recorded on its own message number 32 of a reception table 30 and then updates the number 32 to 4011. Then the device 4 changes its own identification code D into an originating identification code 21. The updated number 4011 of the number 32 is used as a message number 22 and adds this number to the broadcast messages 23 addressed to all store-and-forward switching devices 1 to 6 to generates a transmitting broadcast message 20. This message 20 is sent to the adjacent store and forward switching devices 1 and 5. Each store-and-forward switching devices excluding the ordinary outgoing one uses the code D of the code 21 added to the message 20 as a key word and compares it with the number 32 of the table 30 of a memory 10 in its own device. If the number 32 is smaller than the received message number, the number 32 is updated to 4011 of the received number 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a broadcast communication processing method for all storage and switching devices in a composite switching network composed of a plurality of storage and switching devices, and more particularly to a storage and switching device having at least two adjacent storage and switching devices. The present invention relates to improvement of a broadcast communication processing method for all storage and switching devices in a switching network.

[0002]

2. Description of the Related Art Regarding distribution of received broadcast communication messages, for example, in Japanese Examined Patent Publication No. Sho 63-31971, in a multi-beam satellite communication system, a satellite relay station exchanges broadcast bursts for bursts at arbitrary time positions. A method of allocating broadcast communication to each beam according to Japanese Patent Laid-Open No. 63-169849
The publication discloses a packet broadcast communication method in which a broadcast packet is copied and transferred in an internal network, and selection and sorting of broadcast packets and header replacement are processed in parallel on the outgoing line side.

In general, a switching network is provided with a direct line and a trunk line based on a ring network, a star network, a hierarchical network, etc. according to the traffic between the switching stations, and a detour via several switching stations. It is formed by compounding various networks by a relay route and a bypass direct route. The communication between the two stations is transmitted on this switching network directly or by a route specified by software and hardware. Even in the case of transmitting a broadcast communication message transmitted from any one storage switching device to all the other switching devices in such a switching network of the storage switching device, conventionally, the transmission of the broadcast communication message is conventionally performed in advance. A relay route is defined, and the transmitted broadcast communication message is transmitted according to the designated relay route and transmission direction.

For example, in FIG. 1, the transmission path of the broadcast communication message transmitted from the storage and exchange device 4 to all devices is as follows:
The broadcast communication message originating from the storage and exchange apparatus 4 which is defined as the storage and exchange apparatus 4-1-2-3, 4-5-6, etc. and received by the storage and exchange apparatus 2 via the storage and exchange apparatus 1 is the storage exchange. The same message received by the store-and-forward apparatus 5 from the store-and-forward apparatus 4 is transferred to the apparatus 3 and then transferred to the store-and-forward apparatus 6. The same applies to the other storage and exchange devices 1 to 6.

[0005]

In the transfer processing method of the conventional broadcast communication described above, the transmission path including the backup path is fixedly fixed in advance like the normal two-point communication. When it is necessary to temporarily change the transmission route due to line failure or new storage or switching equipment,
There was a drawback that it took time to switch or change software or hardware, and it was not possible to respond quickly.

That is, in the above-mentioned example, the storage exchange device 1-
When the line between the two is disconnected, the broadcast communication message from the storage and exchange device 4 is not transferred to the storage and exchange devices 2 and 3 until the line between the storage and exchange devices 5-2 is newly set.

The object of the present invention is to remedy the above-mentioned drawbacks,
It is an object of the present invention to provide a broadcast communication processing method in a storage and exchange device capable of automatically setting a broadcast communication transmission path to all devices and quickly transmitting a broadcast communication message to each device.

[0008]

According to the broadcast communication processing method in the storage and exchange apparatus of the present invention, each storage and exchange apparatus that receives the broadcast communication message to all the storage and exchange apparatuses first receives the message. At this time, this broadcast communication message is transferred to all the adjacent storage and switching devices other than the storage and switching device which has transmitted.

For this purpose, preferably, the storage exchange device of the transmission source adds a message identification code to the broadcast communication message and transmits the message.
The storage exchange device that has received this broadcast communication message determines whether or not the broadcast communication message is the first one by the identification code of the broadcast communication message, and in the case of the first received broadcast communication message,
The broadcast communication message is recorded in the own device, and the broadcast communication message is transferred to all the other adjacent storage exchange devices except the storage exchange device which has transmitted.

Further, it is desirable that the identification code of the broadcast communication message includes the identification code of the transmission / reception switching device and the message number.

[0011]

When each storage / exchange device first receives a broadcast communication message addressed to all the storage / exchange devices, it broadcasts to all the other adjacent storage / exchange devices except the storage / exchange device which has directly transmitted. Since the communication message is transferred, it is not necessary to specify the transmission route in advance, and even if any section becomes unreachable, it automatically goes through the bypass route,
Broadcast messages are quickly transmitted to all storage and switching devices.

No matter how many times each storage / exchange device receives the broadcast message, the transfer process is performed only at the first reception.
The broadcast message will not be repeatedly transferred through the same route.

[0013]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 shows a storage / exchange device 1 according to an embodiment of the present invention.
6 is a diagram showing a configuration of a switching network connected in a lattice type, FIG. 2 is a configuration diagram of a broadcast communication message 20 to be transmitted, and FIG. 3 shows an example of a reception table 30 of each of the storage switching devices 1-6. Figure, Figure 4
3 is a flow chart of processing of the storage and exchange devices 1 to 6 which relay the broadcast communication message 20.

In the embodiment shown in FIG. 1, it is assumed that the broadcast communication message 20 is transmitted from the storage and switching device 4, and the broadcast communication message 2
The transmission path of 0 is indicated by a mark. Each of the storage / exchange devices 1 to 6 has a memory 10 to which identification codes A to F are assigned and which stores a received broadcast communication message 20 and a reception table 30 indicating a reception history of the broadcast communication message.
As shown in FIG. 2, the broadcast communication message 20 to be transmitted has a device identification code 21 and a message number 22 that represent the storage switching device of the transmission source as the message identification code 23 in the message content 23 of the broadcast message.
Is added. As shown in FIG. 3, the reception table 30 includes a device identification code column 31 of the storage exchange device of the transmission source for each electronic message and a received electronic message number column 32.

Next, the operation of this embodiment will be described with reference to FIG. First, the store-and-forward device 4 of the transmission source sets the reception table 3
0 is added to the number recorded in the message number 32 of the own device, for example, 4010, and the message number 32 is set to “4011”.
And update. After that, the identification code “D” of the own device is set as the transmission source identification code 21, and the updated message number 32 “401” is set.
1 ”as the message number 22 and all other storage and exchange devices 1 to 6
(However, except 4) A broadcast communication message 20 for transmission is generated by adding it to a telegram message 23 for destination communication, and this transmission message 20 is sent to the adjacent storage and switching devices 1, 5.

When a storage / exchange device other than a general sender receives a transmission message 20, the storage table of the memory 10 in its own device uses the D of the sender identification code 21 added to the message 20 as a keyword. 30 is searched (step S1), and 4011 of the message number 22 of the received message 20 and the message number 32 of the reception table 30 are compared (step S2). If the message number 32 in the memory is smaller than the received message number 22, the message number 32 in the memory is rewritten to 4011 of the received message number 22 and updated (step S3). After that, the message is sent to all the adjacent devices except the storage and switching device that has directly sent the message (step S4).

When the message number 22 in the message and the message number 32 in the memory are compared in step S2, if the message number 32 in the memory is equal to or greater than the received message number 22, the message 20 Is received, but a message is not transferred to another device.

That is, the storage exchange device 4 of the transmission source increments the message number 4010 in the memory of its own device by 1 and updates it to 4011, and in the broadcast message 23, the identification code of its own device is added. The transmission message 20 is generated by adding "D" and "4011" having the same number as the new message number 32 to the message number 22, and the transmission message 20 is sent to the adjacent storage exchange devices 1 and 5.

The storage / exchange devices 1 and 5 use the transmission message 2
When 0 is received, the reception table 3 in the own device is set using the data “D” of the transmission source identification code 21 of the electronic message 20 as a keyword.
0 is searched (step S1). Then, the received message 20
And the data of the message numbers 22 and 32 of the reception table 30 are compared. (Step S2). Storage and exchange device column 31
If the electronic message number 32 corresponding to “D” is smaller than the received electronic message number 22, the electronic message number 32 of the memory is rewritten to “4011” of the electronic message number 22 of the received electronic message and updated (step S3). After that, the storage exchange device 1, 5
Is an adjoining storage and exchange device other than the storage and exchange device 4 of the other party who received the transmission message 20, that is, only the storage and exchange device 2 in the case of the storage and exchange device 1 and the storage and exchange device 2 in the case of the storage and exchange device 5. And 6 (step S4).

The storage / exchange device 2 that has received the message 20 from each of the two storage / exchange devices 1 and 5 is
As in the case of 5, the electronic mail number comparison processing is performed, and the storage exchange device 1
The electronic message 20 received from the storage and switching device 3 and 5 is transferred to the storage and switching device 3 and 5, and the electronic message 20 received from the storage and switching device 5 is transferred to the storage and switching device 1 and 6. In this case, since the received message numbers 22 are the same, the transfer process is performed only for the message received from the storage and exchange device 1 or 5 whichever is received first, and the message received later is not transferred. Perform only confirmation processing.

Therefore, the storage / exchange apparatus 5 receives the broadcast message 20 from the storage / exchange apparatus 1 faster than the storage / exchange apparatus 2 receives it.
When receiving from the storage and exchange device 1, the storage and exchange device 1 receives the broadcast message 20 from the source storage and exchange device 4, and also receives the broadcast message 20 from the storage and exchange device 2 via the storage and exchange device 5. . Similarly, in the case of the storage / exchange device 5, the electronic message from the source storage / exchange device 4 and the electronic message via the storage / exchange devices 1 and 2 are received.

Accordingly, if the line between the storage / exchange devices 4 and 5 is cut off and the broadcast message 20 from the transmission source cannot be received, the storage / exchange device 5 transmits the transmission received from the storage / exchange device 2. The electronic message 20 is transferred to the next storage exchange device 6. Further, when the line between the storage / exchange devices 2 and 5 is also disconnected, conversely, a message sent via the storage / exchange devices 1, 2 and 3 can be received from the storage / exchange device 6.

In the switching network to which the present invention can be applied, it is desirable that all storage and switching devices have at least two adjacent storage and switching devices like a ring network, but a storage and switching device having only one adjacent device is prominent. Even when some of them are mixed, this processing method is effective for the storage and switching apparatus having two or more adjacent storage and switching apparatuses.

[0025]

As described above, according to the present invention, each storage / exchange apparatus that receives the broadcast communication message addressed to all the storage / exchange apparatuses, except for the storage / exchange apparatus that has transmitted the storage / exchange apparatus, has all the neighboring storage exchanges. Since the broadcast communication message is transferred to the device, it is not necessary to set the transmission route in advance, and
Even if any of the sections is not connected, as long as there is a detourable transmission path, there is an effect that the broadcast communication message can be transmitted to all the storage and switching devices.

Further, since the transfer processing of the received electronic message performed by each storage exchange apparatus is not repeated only once when the apparatus receives the electronic message for the first time, the transfer processing of the same electronic message is wastefully circulated in the network. There is an effect that can be prevented.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a switching network of a storage and switching apparatus according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a broadcast communication message 20 to be transmitted.

FIG. 3 is a diagram showing an example of a memory 30 of each storage exchange device 1-6.

FIG. 4 is a storage / exchange device 1 that relays a broadcast communication message 20.
6 is a flowchart of the process of No. 6.

[Explanation of symbols]

 1 to 6 storage exchange device (A to F) 10 memory 20 transmission message 21,30 source device 22,32 message number 23 broadcast communication message 30 reception table S1 to S4 steps

Claims (5)

[Claims] 1. A method of processing a broadcast message to all storage and switching devices, each of which is transmitted by a switching network in which each of the plurality of storage and switching devices is connected adjacent to at least two storage and switching devices. When the store-and-forward device receives the broadcast message for the first time, the store-and-forward device transfers the broadcast message to all other adjacent store-and-exchange devices except the adjacent store-and-exchange device that has directly transmitted to the store-and-exchange device. A broadcast communication processing method in a store-and-forward device. 2. The storage-and-exchange device of the transmission source adds the identification code of the broadcast-and-telecom message to the broadcast-and-telegram messages to all the other storage-and-exchange devices, transmits the message, and receives the broadcast-and-telecom message. The storage exchange apparatus determines whether or not the reception of the broadcast communication message is the first reception by the identification code, and when the broadcast communication message is the first reception message, the broadcast communication message is determined. While receiving the
2. The broadcast communication processing method in a storage and exchange device according to claim 1, wherein the broadcast communication message is transferred to all the adjacent storage and exchange devices other than the adjacent storage and exchange device that has directly transmitted to the storage and exchange device. 3. The identification code of the broadcast communication message includes the device identification code and the message number of the storage / exchange apparatus that is the transmission source, and each storage / exchange apparatus records the identification code of the received broadcast communication message. 2. A broadcast communication processing method in the storage and exchange device as described in 2. 4. In a switching network in which each of a plurality of storage and switching devices is connected adjacent to at least two storage and switching devices, each of the storage and switching devices is broadcast to all of the storage and switching devices. A broadcast communication message generating means for generating a message, a recording means for recording the broadcast communication message transmitted from any storage exchange device of the storage exchange devices, and the broadcast communication Transfer determination means for comparing the message with the record of the broadcast communication message recorded in the recording means to determine whether transfer to the next device is necessary, and the received communication message for the adjacent communication device that has transmitted the broadcast communication message. A broadcast communication processing method for a storage / exchange device, comprising: a transfer unit for transferring to all other adjacent exchange devices except the storage / exchange device. 5. The broadcast communication message addressed to all the storage and switching devices generated by the broadcast communication message generating means includes the identification code of the source storage and switching device and the identification code of the corresponding broadcast communication message. The record of the broadcast communication message recorded by the means includes the identification code of the storage exchange device of the transmission source and the corresponding broadcast communication message, and the transfer determination means determines that the received broadcast communication message matches the record of the recording means. 5. The broadcast communication processing method according to claim 4, wherein the transfer is required when not being performed, and the transfer is not required when being matched.