Communication line setting method

Description: TECHNICAL FIELD [Detailed description of the invention]

【0001】

[Industrial application field]

The present invention is used when connecting between premises networks such as a local area network (LAN) via a communication network that requires a communication line to be set prior to communication, such as a public telephone network, or between a communication network and a premises network. Regarding the communication line setting method when the destination specification method (number planning, addressing) and the connection procedure are different, especially for conversion of the destination specification format at the network connection point, acquisition of destination information, and network connection. The present invention relates to a communication line setting method suitable for communication line setting.

【0002】

[Conventional technology]

In the conventional communication line setting method, when connecting networks with different destination specification formats (addressing), it is not possible to interpret multiple destination specification formats in each network, so set a communication line for each destination. There is a method of interpreting the destination and delivering the information using the corresponding communication line, or a method of broadcasting the information to all communication devices and delivering the information to the target destination. For example, in a communication network such as a public network where a procedure for setting a communication line exists, the address of the communication network is assigned to each physical connection position of the terminal, the route is selected based on the communication network address, and the communication line is set. The communication network address is not set in the terminal. On the other hand, in a LAN, the terminal itself has a MAC (Media Access Control) address or IP (Inter) regardless of its physical location. A personal address, etc. (hereinafter referred to as a device address) is set, and information is delivered to the destination with this device address. Therefore, when the information whose destination is specified by the LAN device address is communicated via another communication network such as a public network, the connection device at the connection point between the communication network and the LAN is used as the connection device for each destination. It is necessary to acquire the address of the assigned communication network and manage the correspondence with the device address. In addition, LAN communication devices are subject to changes such as movement, expansion, and removal, and the device addresses are also changed, such as movement, new installation, and deletion. It is not fixed, but changes from moment to moment.

【0003】

[Problems to be Solved by the Invention]

In the above-mentioned conventional technology, it is necessary to acquire the address of the communication network assigned to the connection device for each destination by the connection device at the connection point between the communication network and the LAN, and manage the correspondence with the device address. The process was complicated and could not be easily realized. In addition, the method of following the correspondence between the device address and the public network address, which changes every moment as the device address of the LAN communication device changes, is complicated in processing and cannot be easily realized. An object of the present invention is to improve such a problem by acquiring address information each time communication is performed and setting an individual communication line using the address information at the time of the next communication to improve communication. An object of the present invention is to provide a communication line connection method capable of simplifying the process for setting a line and improving the amount of communication communication between premises networks.

【0004】

[Means for solving problems]

In order to achieve the above object, the communication line setting method of the present invention includes a broadcast communication line that can be received by all communication devices (in the embodiment, a connection device at a connection point between the communication network and the premises network). In a communication network provided with an individual communication line set between the source connection device and the destination connection device by the connection request signal, the transmission side connection device is the same when the destination communication network address is unknown. A communication packet with the communication network address of the source connection device, the source device address, and the destination device address is broadcasted using the information communication line, and the connection device on the receiving side is the broadcast communication line. By repeating the operation of writing the communication network address of the source of the information received via the device and the device address to the destination address management table (DA management table) managed by the connection device, each connection device has the address of the destination communication network. The correspondence between and the device address is created in the address management table (SA management table, DA management table), and the destination device address and the device address held in the address management table are set at the next connection request. If there is a match, the individual communication line is set using the address of the communication network held there, and the information is transferred.

【0005】

[Action]

In the present invention, each communication device is provided with an address management table managed by the own device, and when an individual communication line to the destination communication device is not set, the transmitting side sets the information to be transferred to the source communication device. The identification information is added and transferred using the broadcast communication line. On the other hand, when the receiving side receives the information on the broadcast communication line, the receiving side takes out and holds the identification information of the communication device of the source. As a result, the communication device side automatically acquires and manages the correspondence between the communication network address and the device address. Then, when transferring information, based on the correspondence, a connection request signal is sent to the communication network to set an individual communication line, and the information is transferred using the individual communication line. Therefore, the communication line setting process for the communication device of the destination whose address of the communication network is unknown is simplified, and individual communication lines are set one after another. Therefore, the communication request is distributed from the broadcast communication line and between the premises networks. Communication volume can be improved.

【0006】

[Example]

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 2 is a configuration diagram of a communication system according to an embodiment of the present invention. In FIG. 2, 1 is a communication network such as a public network, 2 is a broadcast communication line set in the communication network 1, and 3 is an individual communication line in the communication network 1 set between the connection device 4 and the connection device 5. , 4 to 6 are communication devices that connect the premises networks 7 to 9 and the communication network 1 (connection devices at the connection point between the communication network 1 and the premises networks 7 to 9), 7 to 9 are the premises networks such as LAN, 10 ~ 18 is a communication terminal connected to any of the premises networks 7 ~ 8. This embodiment shows a case where the premises network is connected by a communication network, and the address formats, coding rules, and communication procedures of the premises networks 7 to 9 and the communication network 1 are different. Further, the connecting devices 4 to 6 know in advance the identifier B of the broadcast communication line 2 and the communication network address of the connection point of the own communication network 1. In this case, the addresses of the communication networks of the connecting devices 4 to 6 are indicated by A4 to A6. The device addresses of the communication terminals 10 to 18 are α to ι. In addition, the connection devices 4 to 6 include a source address (hereinafter referred to as SA) management table for registering and managing the device address of the source, the device address of the destination communication terminal, and the premises network and communication network to which the communication terminal belongs. Destination address for registering and managing the communication network address of the connecting device connecting to 1 (hereinafter, the communication network address of the connecting device is referred to as the device ID in the DA management table) and the identifier (line ID) of the line in the communication network 1. It has an address management table composed of a management table (hereinafter referred to as DA).

【0007】

Here, the communication procedure between the connecting devices will be described. First, a case where the communication terminal 10 connected to the premises network 7 communicates with the communication terminal 13 connected to the premises network 8 will be described. FIG. 1 is a flowchart showing the operation of a transmitting side connecting device according to an embodiment of the present invention, FIG. 3 is an explanatory view showing a communication procedure between connecting devices according to an embodiment of the present invention, and FIG. 4 is an embodiment of the present invention. An example diagram of the address management table of the connecting device 4 in the example, FIG. 5 is an example diagram of the address management table of the connecting device 5 in one embodiment of the present invention, and FIG. 6 shows the operation of the receiving side connecting device in one embodiment of the present invention. It is a flowchart. In this embodiment, as shown by the dotted line in FIG. 3, communication is performed using the broadcast communication line. In this case, the communication terminal 10 sends out information to the destination communication terminal 13 according to the communication procedure of the premises network 7, and this information reaches the connecting device 4 based on the routing of the premises network 7. When the connecting device 4 receives the information, it takes out the destination device address (δ) and the source device address (α) as shown in FIG. 1, and sets the source device address (α) in the SA management table of FIG. Write to and hold. Also, the device address (δ) is compared with the retained information in the DA management table (101). The arrows in FIGS. 4 and 5 indicate the writing of information. As a result, if there is no match (102), a communication packet in which the communication network address (A4) of the connecting device 4, the source device address (α), and the destination device address (δ) are set is sent. Send to the broadcast communication line according to the connection procedure of communication network 1 (103). In this embodiment, it is assumed that the information does not exist in the DA management table. On the other hand, the connecting device 5 that receives the communication packet to the communication terminal 13 via the broadcast communication line 2 relays the communication packet as it is to the premises network 8 (601 to 603) as shown in FIG. At that time, the connecting device 5 compares the information held in its own DA management table shown in FIG. 5 with the address (A4) of the communication network of the connecting device of the source set in the communication packet (604). As a result, if there is no match (605), the communication Write the device address (α) of the source of the packet and the communication network address (A5) of the connection device of the source (606). However, when a communication packet using the broadcast communication line 2 is received, the information is not written in the individual line identifier (line ID). In the connecting device 6, the same processing as in steps 601 to 606 is performed.

【0008】

Next, a case where the communication terminal 14 sends information to the communication terminal 10 will be described following FIG. In this case, the connecting device 5 has already acquired the address information regarding the communication terminal 10. FIG. 7 is an explanatory diagram showing a communication procedure between connecting devices according to an embodiment of the present invention. In this embodiment, as shown by the dotted line in FIG. 7, communication is performed by the individual signal line 3. In this case, when the connecting device 5 receives the information addressed to the communication terminal 10 from the communication terminal 14, it takes out the destination device address (α) and the source device address (ε), and performs the process of step 101 in FIG. Do. In this process, the connecting device 5 finds the destination device address (α) written in the processing at the time of receiving the broadcast communication (steps 601 to 606 in FIG. 6) in its own DA management table (102). And since the individual communication line to the destination is not set (a valid line ID is not set in the line ID column) (104), the destination is set for the individual communication line setting for the connection device 4. A connection request signal for which the communication network address (A4) of the connection device 4 is set is sent to the communication network 1 (105). The identifier (a) of the individual communication line 3 set as a result is written to the line ID section in the corresponding DA management table (106). As a result, a communication packet addressed to the communication terminal 10 is transmitted using the individual communication line 3 (107). On the other hand, as shown in FIG. 6, the connecting device 4 sets the destination device address (α) of the communication packet received via the individual communication line 3 and the retained information in the SA management table of FIG. 4 managed by itself. Compare (601,602, 607) If there is no match (608), disconnect the individual communication line (609). In the normal case, since the connecting device 4 holds the information written in the process before the broadcast communication (step 101 in FIG. 1), the individual communication lines are not disconnected. Further, the connecting device 4 compares the device address (ε) of the source set in the communication packet with the holding information of the DA management table in FIG. 4 (610). As a result, if there is no matching information (611), the source device address (ε) and the device ID (A5) of the source connection device of the individual communication line are written and held (612). Even if there is matching information, if valid information is not set for the line ID (613), the individual communication line identifier (a) is written to the line ID (614). In steps 611 and 613, if there is a match and the line ID information is a (615), nothing is written. If the line ID is another value other than a (for example, d), the DA, device ID, and line ID are written as in the case where there is no matching holding information in steps 611 and 613 (616).

【0009】

Next, a case where the communication terminal 11 (β) sends information to the communication terminal 14 (ε) following the above communication will be described. FIG. 8 is an explanatory diagram showing a communication procedure between connecting devices according to an embodiment of the present invention. In this embodiment, as shown by the dotted line in FIG. 8, communication is performed by the individual signal line 3. When the connecting device 4 receives the information addressed to the communication terminal 14, it takes out the destination device address (ε) and the source device address (β), and performs the process of step 101 in FIG. In this case, since the destination device address (ε) has already been written to the DA management table in FIG. 4 in the process of FIG. 7 (steps 610 to 616 in FIG. 6), the connection device 4 matches in the DA management table. Since it is found that the identifier of the individual communication line reaching the destination is a (102,104), the individual communication line 3 is used to send a communication packet addressed to the communication terminal 14 (107). .. On the other hand, when the connecting device 5 receives the communication packet on the individual communication line 3, the connecting device 5 performs the same operation as in the case of FIG. 7 (steps 607 and 608 in FIG. 6). Further, the connecting device 5 compares the device address (β) of the source of the communication packet with the holding information of the DA management table of FIG. 5 (610), and if they do not match, the device address (β) of the source and the transmission device 5 are transmitted. Write the original communication network address (A4) and individual communication line (a) to the DA management table (611 to 614).

【0010】

[Effect of the invention]

According to the present invention, the connecting device can instruct a communication request by the device address, and the connecting device performs a process for setting a communication line for the connecting device whose destination communication network address is unknown. Individual communication lines are set one after another as the communication is simplified and actively performed, and the communication volume between the broadcast communication lines is distributed to the individual communication lines to improve the communication communication volume between the premises networks. can do.

【0011】

[Simple explanation of drawings]

[Figure 1]

It is a flowchart which shows the operation of the transmission side connection device in one Example of this invention.

[Figure 2]

It is a block diagram of the communication system in one Example of this invention.

[Fig. 3]

It is explanatory drawing which shows the communication procedure between connection devices in one Example of this invention.

[Fig. 4]

It is an example figure of the address management table of the connection device 4 in one Example of this invention.

[Fig. 5]

It is an example figure of the address management table of the connection device 5 in one Example of this invention.

[Fig. 6]

It is a flowchart which shows the operation of the receiving side connection device in one Example of this invention.

[Fig. 7]

It is explanatory drawing which shows the communication procedure between connection devices in one Example of this invention.

[Fig. 8]

It is explanatory drawing which shows the communication procedure between connection devices in one Example of this invention.

[Explanation of symbols]

1 Communication network 2 Broadcast communication line 3 Individual communication line 4 Communication device (connection device) 5 Communication device (connection device) 6 Communication device (connection device) 7 Campus network 8 Campus net 9 Campus network 10 Communication terminal 11 Communication terminal 12 Communication terminal 13 Communication terminal 14 Communication terminal 15 Communication terminal 16 Communication terminal 17 Communication terminal 18 Communication terminal