JP3272234B2 - High-speed connection setting method for ATM communication network - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection setting method for data transfer by setting a VCC (virtual channel connection) or a VPC (virtual path connection) between terminal devices in an ATM (Asynchronous Transfer Mode) communication network. In particular, the present invention is applied to communication services for applications that do not require bandwidth guarantee.

[0002]

2. Description of the Related Art FIG. 7 shows a conventional VP / V described in, for example, IEICE technical report IN93-110, "High-speed VCC setting method in wide area private ATM network".
FIG. 8 is a functional block diagram showing an example of the configuration of an ATM switching device for performing VC setting according to the signal sequence shown in FIG. 7, and FIG. 2 is a premise of the signal sequence diagram in FIG. FIG. 3 is a diagram showing an example of an ATM communication network configuration.

First, in FIG. 2, 1 and 1a to 1e
Are ATM switching devices, and 2 and 2a to 2e are
Connection links for connecting M switching devices and transmitting ATM cells, 3 and 3a to 3h are terminal devices accommodated in the ATM network, 4 is a network management device connected to the ATM network and managing and controlling the ATM network, Reference numerals 5 and 5a to 5i denote subscriber lines for connecting the above-mentioned terminal device or network management device to the ATM switching device and transmitting ATM cells. Also, in FIG.
Is a call signal sent from the calling terminal to the ATM switching device, 62 is a call signal sent from the ATM switching device to the called terminal, and 63 is a call signal sent from the called terminal to the ATM switching device. An incoming call response signal 64 is a call response signal sent from the ATM switching device to the calling terminal device 65a.
65a to 65c are VCC setting request signals transferred between ATM switching devices, 66a to 66c are VCC setting response signals transferred between ATM switching devices, 67 is an ATM switching device from a calling terminal to a called terminal. This is a data transfer performed via. In FIG. 8, reference numeral 12 denotes a subscriber line interface function unit for terminating a subscriber line, 13 denotes a connection link interface function unit for terminating a connection link, and 11
Is a VP / VC connection function unit for connecting between VPs or VCs by exchanging ATM cells between the subscriber line interface function unit 12 and the connection link interface function unit 13, and 112 is a VP level and VC level connection VP / VC connection data holding the relationship, 111
ATM cell exchange function for exchanging ATM cells in accordance with P / VC connection data, 14 is a control function unit for performing various control signal processing and device management, and 141 is for various management in the device and communication with a network management device. Device management function, 142 is V
CC setting control function; 143, network configuration information exchange function;
Reference numeral 4 denotes a routing table, and 145 denotes a terminal device accommodating terminal apparatus table.

[0004] A connection setting method according to a conventional VC setting method will be described below.

[0005] In FIG. 2, for example, a terminal device 3 a that has issued a data transmission request to the terminal device 3 g has a destination address of the terminal device 3 g as a destination address unless VCC has been set between itself and the terminal device 3 g at that time. A call signal 61 designating an ATM network address is sent to the ATM exchange 1a (see FIG. 7). Upon determining that the destination address is not a terminal device that directly accommodates itself, the ATM switching apparatus 1a that has received the call signal 61 determines that the routing table 1
The ATM switch 1c is selected as the next transit point with reference to 44, and the VCC setting request signal 65a is sent to this. The ATM switching device 1c, which has received the VCC setting request signal 65a, performs the same processing as the VCC setting request signal 65a.
b to the ATM exchange 1d,
The exchange 1d sends a VCC setting request signal 65c to the ATM exchange 1e. The ATM switching device 1e receiving the VCC setting request signal 65c determines that the terminal device 3g directly accommodates the destination terminal device 3g, and connects the terminal device with reference to its own device accommodation terminal device table 145 held by itself. The incoming call signal 62 is sent to the terminal device 3g. Further, upon receiving the call response signal 63 from the terminal device 3g, the ATM switching device 1e sets the connection data of the VCC in its own VP / VC connection data, and sends the VCC setting response signal 66a to the ATM switching device 1d. I do. By the same processing, the VCC setting signals 66b and 66c are sent to the ATM switching devices 1c and 1a, and finally, the call response signal 64 is sent from the ATM switching device 1a to the terminal device 3a, and the terminal device 3a and the terminal device VCC setting for 3g is completed. When the VCC setting is completed, the terminal device 3a transmits data to the terminal device 3g by transmitting the data transfer signal 67 on the set VCC.

After the data transfer is completed, the VCC may be released immediately by a release procedure, or may be held for a while in preparation for the next data transfer.

[0007] The routing table 144 held by the ATM switching device 1 stores information sufficient to determine the next ATM switching device to be passed through from the destination address information as described above. There is a case where device connection relation information is held. In the latter case, V
In some cases, the CC setting request signal 65 has VCC setting path information in which the ATM switching devices that pass through are specified in order. The contents of the routing table 144 are transmitted from the network management device 4 to each ATM switching device 1 and set.
There is a case where the routing information is exchanged between the TM switching devices 1 for setting.

FIG. 9 is a diagram showing an example in which the network management device 4 sends each ATM.
VP / VC connection data setting signal 68
The signal sequence when VPC or VCC is set in advance between all the terminal devices in the network by transmitting the. In the figure, 68a to 68d
Is VP / sent from the network management unit to each ATM switching unit.
This is a VC connection data setting signal. In this case, the terminal device 3
The data transfer can be immediately performed to the terminal device 3g without performing the VCC setting process when the data transmission request is generated in a.

[0009]

Since the prior art is configured as described above, all the ATs on the VCC setting path are
In the M exchange, the VCC setting request signal 65 and the VCC
Since the transmission / reception processing of the setting response signal 66, the accompanying routing determination processing, and the VP / VC connection data setting processing are performed, it takes time until the VCC setting is completed, and a data transmission request is generated on the calling terminal device. After that, there was a problem that data transfer could not be started easily.

In the connection setting method based on the signal sequence of FIG. 9, although the time from when a data transfer request is generated on a terminal device to when data transfer is started is short, VPC / VPC is previously established between all terminal devices. VC
Setting C requires a large amount of resources such as VP identifiers / VC identifiers, and is difficult to implement in a large-scale communication network. The switching device receives a VP /
Since the VC connection data cannot be set, there is a problem that it is difficult to apply to communication over a plurality of communication networks of different network operators.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has been made to reduce the time from the occurrence of a data transfer request on a terminal device to the start of data transfer, and to reduce the time. An object of the present invention is to obtain an ATM communication network that can be applied to communication over a plurality of communication networks of different scale networks and different network operators.

[0012]

In order to achieve the above object, a first aspect of the present invention provides a plurality of ATM switching devices interconnected by a connection link and a plurality of terminals accommodated in these ATM switching devices. consists device, in a high speed connection setting method of ATM communication network by exchanging VCC setting signal performs a connection setup between the terminal device between the ATM switching device during a call from these terminals, VP to arbitrary
C on a path composed of a connection link that can be set up and a relay ATM switching device, prior to a call from the terminal device.
In order to exchange VPC setting signals between ATM exchanges,
Wherein the row Ukoto the VPC setting more a logical connection link between the ATM switch.

According to a second aspect of the present invention, in the first aspect, each ATM switching device has connection link option information for reaching each address corresponding to each address. By referring to the routing table, the next connection link to be routed is selected and the VP
The VPC setting is performed by transferring a C setting request signal.

According to a third aspect of the present invention, in the first aspect of the present invention, each of the ATM switching devices comprises:
By referring to a routing table having connection information between all ATM switching devices within a specific range of the TM communication network, a VPC setting request signal including routing information to the ATM switching device to which the VPC is connected is generated. The VPC setting is performed by exchanging between ATM switching devices.

According to a fourth aspect of the present invention, in the first aspect of the present invention, each of the ATs is transmitted from a network management device locally connected to an ATM switching device.
The transmission of the control command of the VPC setting instruction to the M switching device is triggered, and each ATM switching device performs the VPC setting according to designated conditions.

According to a fifth aspect of the present invention, in order to achieve the above object, in any one of the first to third aspects, the routing table is periodically exchanged between the ATM switching devices to exchange the network configuration information. When generating or updating, the VPC setting is performed on the ATM switching device, triggered by detecting an ATM switching device that satisfies a condition specified in advance and has not yet been set with the VPC. It is characterized by.

According to a sixth aspect of the present invention, in accordance with the fourth aspect of the present invention, the address information for directly designating the destination ATM switching device for the VPC setting is specified as a VPC setting condition. It is characterized by doing.

According to a seventh aspect of the present invention, in accordance with the fourth aspect of the present invention, the number of relay stages specified by the VPC is specified as a VPC setting condition. VPC setting is performed with all ATM switching devices that can be reached by VPC and can be VPC set.

According to an eighth aspect of the present invention, in the ATM communication network having the hierarchical structure according to any one of the fourth and fifth aspects, each of the ATM switching devices transmits a VPC signal.
Specify the upper layer to be set as the VPC setting condition,
V between the ATM switch and the designated upper layer connection port
PC setting is performed.

According to a ninth aspect of the present invention, in accordance with any one of the first to third aspects of the present invention, the destination address information is continuously monitored when a VCC is set by a call from a terminal device. A called ATM whose VCC is set at a frequency or a cumulative frequency higher than a predetermined standard.
When a switching device is detected, this is used as a trigger for the ATM.
It is characterized in that the VPC setting is performed with the exchange device.

Further, in order to achieve the above object, the first
0 is the invention according to the ninth invention, wherein V
After setting the PC, the usage status of the VPC is continuously monitored, and when it is detected that the usage status is lower than a predetermined reference, the VPC is released.

[0022]

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

<Embodiment 1> FIG. 1 is a signal sequence diagram showing a connection setting sequence in this embodiment, FIG. 2 is a diagram showing a configuration example of an ATM communication network which is a premise of the signal sequence of FIG. 1, and FIG. Is the AT in the present embodiment.
FIG. 4 is a diagram showing a configuration of an M switching device, and FIG. 4 is a diagram showing a configuration example of a routing table shown in FIG. In the drawings, the same or corresponding members as those in the related art are denoted by the same reference numerals, and description thereof will be omitted.

In FIG. 1, reference numerals 71a and 71b denote ATs.
VPC setting request signal transferred between M switching devices, 72a
And 72b are VPC setting response signals transferred between ATM exchanges. In FIG. 3, reference numeral 8 denotes a routing table, and 146 denotes a VPC setting control function unit held by the control function unit 14 in the ATM switching device 1.

The connection setting operation in the present embodiment will be described below with reference to FIGS. 1, 2, 3 and 4. The ATM switching device 1a, for example,
The reception of a VPC setting instruction command from a control console connected to the TM switching device 1a or a network management means such as the network management device 4 triggers an AT corresponding to the VPC setting condition specified by the VPC setting instruction command.
A VPC setting operation with the M exchange is started.

Here, there are several methods for designating VPC setting conditions. For example, (A) address information for directly designating a destination ATM exchange is designated and a VPC is set between the ATM exchange and the ATM exchange. Method (B) There is a method in which the number of relay stages of the VPC is specified, and the VPC can be set with all the ATM switching devices which can be reached by the number of relay stages and which can be set VPC.

In an ATM communication network having a hierarchical structure (an ordinary communication network often has a hierarchical structure), (C) an upper layer in which VPC setting is performed from the ATM switching device is specified. A method of setting a VPC with an ATM switching device serving as a connection port of a designated upper layer will be particularly effective. Using any of the above methods (A) to (C), for example, a VPC
VPC of the ATM exchange 1a specified to set
The setting control function 146 refers to its own routing table 144.

FIG. 4 is a diagram showing an example of the configuration of a routing table in the present embodiment. Here, the routing table is indicated by reference numeral 8 for convenience. Although several formats of the routing table 8 are conceivable, in this embodiment, the connection link interface function unit accommodating the connection link as option information of the connection link to be passed next to reach the destination address. Number, a connection link type indicating whether the connection link can arbitrarily set a VP thereon, or whether a usable VP identifier has already been determined and a VP cannot be additionally set, a usable VP identifier Using a routing table in which one or a plurality of pieces of connection link information, each of which includes a connection cost based on some evaluation criterion such as the value of the VP identifier when the link is already determined and the number of relay stages when the link is used, are stored. ing. The case where a routing table of another format is used will be described later.

As a result of referring to such a routing table 8, if a connection link connected to the ATM switching device 1c is selected as a connection link to which the VP can be arbitrarily set and to be passed next, the ATM switching device 1a A VPC setting request signal 71a specifying the ATM switching device 1d as a destination address is transmitted to the ATM switching device 1c (see FIG. 1). Upon receiving the VPC setting request signal 71a, the ATM switching device 1c similarly refers to its own routing table 8, selects a connection link to be passed next, and sends the VPC setting request signal 71b to the ATM switching device 1d. Send it out. A receiving VPC setting request signal 71b
Since the TM switching device 1d is the destination, the VP
The C setting response signal 72a is returned to the ATM switching device 1c, and the routing table 8 held by itself is returned.
Is additionally registered. The ATM switching device 1c receiving the VPC setting response signal 72a
The VPC information is set in the P / VC connection data 112, and a VPC setting response signal 72b is transmitted to the ATM switching device 1a. The ATM switching device 1a
Upon receiving the C setting response signal 72b, the VPC is additionally registered in the routing table 8, and the VPC setting is completed. The VPC setting request signal 71 and the VPC setting response signal 72 are transmitted from the VPC setting control function 146 to the connection link 2 via the connection link interface function unit 13, and the connection of the connection destination ATM switching apparatus by the connection link 2 is performed. The data is received by the link interface function unit 13 and transferred to the VPC setting control function in the ATM switching device. Incidentally, in the case of the VCC setting, the processing is performed in the same procedure except that the processing is performed by the VCC setting control function.

When the number of relay stages is specified as the VPC setting condition, the VPC setting request signal 71 includes, in place of the destination address, the number of relay stages until reaching the final destination ATM switching device, For example, means for providing information on the number of relay stages may be used.

Further, when the upper layer of the VPC setting destination is specified, information for specifying the upper layer is provided instead of the destination address in the VPC setting request signal 71, or the ATM switching device is specified in the destination address. Means may be used such as designating partial address information that can specify up to a specified hierarchy instead of an address.

It is assumed that data to be transmitted from the terminal device 3a to the terminal device 3g is generated after the VPC is set between the ATM switching devices 1a and 1d as described above. In this case, the terminal device 3a transmits the call signal 61 to the ATM in the same manner as in the case of the conventional connection setting.
It is sent out to the exchange 1a. Then, the call signal 61
The subscriber line interface function unit 12 of the ATM switching device 1a that has received the information is connected to the routing table 8 as in the conventional case.
In this embodiment, as described above, the VPC
Since a connection link directly leading to the ATM switching device 1d is generated by the setting, by referring to the connection cost and the like, the link is selected as a connection list to be passed next, and a VCC setting request is sent to the ATM switching device 1d. Signal 6
5d will be transmitted. These operations in the ATM switching apparatus 1a are basically the same as the processing at the time of receiving a call signal in the conventional connection setting. And V
The CC setting request signal 65d is not terminated in the ATM switching device 1c,
The data is transferred to the ATM switching device 1d through the TM cell as it is. Thereafter, the same processing as in the case of the conventional connection setting is performed, and the VCC setting request signal 65, the incoming call signal 62, the incoming call response signal 63, the VCC setting response signal 6
6. After the call response signal 64 is sequentially transferred and a VCC is set between the terminal devices 3a and 3g, the data transfer 6
7 is executed.

As described above, in the present embodiment, the VCC is set using the VPC set in advance between the ATM exchanges.
In order to perform the setting, the ATM switching device 1c existing between the ATM switching device 1a and the ATM switching device 1d functions as a mere transmission device, whereby the number of relay processing stages at the time of setting the VCC can be reduced, and The time required for connection setting is reduced as compared with the case where relay processing is performed in all ATM switching devices.

Further, compared with the case where VPC / VCC is set in advance among all the terminal devices, the required amount of VP identifier / VC identifier is small, so that application to a large-scale network is possible. Yes, and VP
Since the VPC setting is performed by exchanging the VPC setting signal between the ATM switching devices instead of performing the C setting, the present invention can be applied to communication over a plurality of communication networks of different network operators.

<Embodiment 2> In Embodiment 1 described above, the routing table 8 having the option information of the connection link to be passed next corresponding to the destination address is used.
By using a routing table having connection information between all the ATM switching devices within a specific range of the ATM communication network, the route information to the destination ATM switching device is included in the VPC setting request signal in advance, so that the relay point can be used. VP that reduces processing time and ensures that paths do not loop
It is also possible to perform a C setting process.

FIG. 5 is a diagram showing an example of the configuration of a routing table according to the present embodiment, which is indicated by reference numeral 9 for convenience. Along with the address of the ATM switch connected to each ATM switch within a specific range, an interface number specifying the connection link interface function unit, and a VP identifier on which the connection link can arbitrarily set a VP or use a VP Is already determined and a VP cannot be arbitrarily added, a connection link type, a value of the VP identifier when a usable VP identifier is already determined, the number of relay stages when the link is used, and some evaluation criteria. Is stored as connection link information. Therefore, in the case of the present embodiment, since each ATM switching device knows the entire ATM network configuration within a specific range, the VPC setting is started even when the number of relay stages or the upper layer is specified as the VPC setting condition. In the ATM switching device, a final connection destination is searched in advance by referring to a routing table, and VPC setting can be performed by a normal VPC setting request signal.

The specific processing is as follows. That is, the ATM switching device 1a, for example,
When a VPC setting instruction command is received from a network management device such as a control console or a network management device 4 connected to the M switching device 1a, this signal is used as a trigger to trigger a VPC setting condition specified by the VPC setting instruction command. A VPC setting operation with the ATM switching device corresponding to the above is started. Any of the above-described methods (A) to (C) can be used as the method for specifying the VPC setting conditions, as in the first embodiment. When the ATM switching device 1d corresponds to the VPC setting condition, the ATM switching device 1a refers to its own routing table 9.

As a result of referring to the routing table 9,
If a connection link connected to the ATM switching device 1c is selected as a connection link to be arbitrarily set and to be passed next, the ATM switching device 1a sends a VPC setting request signal specifying the ATM switching device 1d as a destination address. 71a
To the ATM exchange 1c (see FIG. 1).
ATM switching device 1c receiving VPC setting request signal 71a
Similarly, referring to its own routing table 9, it selects a connection link to be passed next, and sends a PC setting request signal 71b to the ATM exchange 1d. The ATM switching device 1d that has received the VPC setting request signal 71b returns the VPC setting response signal 72a to the ATM switching device 1c because it is the destination, and is set in its own routing table 8. VPC contents are additionally registered. VPC setting response signal 72
The ATM switching device 1c that has received the a sets the information of the VPC in its own VP / VC connection data 112 and transmits a VPC setting response signal 72b to the ATM switching device 1a. Upon receiving the VPC setting response signal 72b, the ATM switching device 1a additionally registers the VPC in the routing table 8, and completes the VPC setting.

Thereafter, as in the first embodiment, when data to be transmitted from the terminal device 3a to the terminal device 3g is generated, the ATM switching device 1a receiving the call signal 61
Already has a VPC
Since a connection link directly leading to the ATM switching device 1d is generated by the setting, by referring to the connection cost and the like, the link is selected as a connection list to be passed next, and a VCC setting request is sent to the ATM switching device 1d. Signal 6
5d will be transmitted.

<Embodiment 3> In Embodiments 1 and 2 described above, the case where routing tables of different formats are used has been described. However, such routing information is transmitted from a local control console or a network management device. The batch setting can be performed by the same procedure as RIP or OSPF standardized by IETF, for example.
It is also possible to generate and update information by exchanging information periodically between the TM exchanges. In this case, the network configuration information exchange function 143 in each ATM exchange is also connected via the connection link interface function unit 13. Communication with each other, and based on the obtained information, the routing table 144 in the own device.
To update.

In the case of a communication network in which the routing table is generated and updated by the latter means, the VPC setting conditions as described in the first embodiment are set in advance from the local control console or the network management device to each ATM switching device. It is necessary to set V when creating / updating the routing table.
The detection of an ATM switching device that satisfies the PC setting conditions and has not yet been set with the VPC may be used as a trigger to perform a VPC setting operation with the ATM switching device.

In the first or second embodiment, even when the network configuration changes, the VPC setting is not performed unless a VPC setting instruction command is sent from the network management device each time. However, as in this embodiment, By using the time of generation / update of the routing table as the trigger of VPC setting,
Once the VPC setting conditions are set once, there is an effect that the VPC setting can be automatically performed according to a change in the network configuration. A specific VPC setting method is the same as in the first and second embodiments.

<Fourth Embodiment> In the third embodiment described above, the case where the generation / update of the routing table is used as a trigger for VPC setting is described. The destination address information at the time of the VCC setting by the call is continuously monitored, and the called-side ATM switching device for which the VCC setting has been performed at a frequency or a cumulative frequency higher than a reference specified in advance from a local control console or a network management device is determined. When the detection is detected, the detection may be used as a trigger to set the VPC with the ATM switching equipment. This is to selectively perform VPC setting only between terminals that are frequently used, thereby further improving efficiency.

FIG. 6 is a diagram showing an example of the configuration of an ATM switching device according to the present embodiment. In the drawing, reference numeral 147 continuously monitors destination ATM switching device information when a VCC is set by a call from a terminal device. This is a destination address monitoring function. V that receives a call signal via the subscriber line interface function unit 12
The CC setting control function 142 controls the routing table 14
4 and transmits a VCC setting request signal to the next ATM switching device, and notifies destination address monitoring function unit 147 of destination address information. The destination address monitoring function unit 147 collects the destination address information, and performs the ATM setting where the VCC setting is performed beyond the specified reference.
When a switching device is detected, it is sent to the VPC setting control function 14.
6 to start the VPC setting process.
In this case, the VPC setting can be effectively and automatically performed between ATM switching devices having a large communication frequency or a large number of times.

Further, in the case of the present embodiment, how much the VPC after the setting is used at the time of setting the VCC is continuously monitored, and when the VPC is used under a reference condition specified in advance from a local control console or a network management device. If it is detected that there is, the VPC may be released. In FIG. 6, reference numeral 148 denotes a VPC usage status monitoring function for monitoring the usage status of the VPC. In this case, when the VPC setting control function unit 146 receives the VPC setting response signal and ends the VPC setting process, the VPC setting information
The specification status monitoring function unit 148 is notified. Further, the VCC setting control function unit 142 sends the VCC setting request signal to the next AT.
When transmitting to the M exchange, or when the VCC setting response signal is received and the VCC setting process is completed,
The used connection link information is notified to the PC usage monitoring function unit 148. VPC usage status monitoring function unit 14
8 is the VP notified from the VPC setting control function unit 146.
The C setting information is held, and the use information of each VPC holding the setting information is counted and monitored based on the connection link information notified from the VCC setting control function unit 142. Furthermore, V
When the PC usage status monitoring function unit 148 detects a VPC whose usage status is lower than the reference as a result of the periodic check, the PC usage status monitoring function unit 148 notifies the VPC setting control function unit 146 of this, and the release process of the VPC starts. Is done.

According to this processing, when communication traffic conditions in the ATM network change, it is possible to prevent wasteful consumption of resources such as VP identifiers by maintaining unnecessary VPCs.

Although the embodiments of the present invention have been described above, it goes without saying that the present invention can be applied not only to a so-called local area network (ATM-LAN) but also to a wide area network (WAN).

[0048]

As described above, according to the present invention,
Since the VPC setting is completed between the ATM switching devices in advance, the time from when a data transfer request is generated on the terminal device to when the data transfer is started can be shortened.

Also, as a connection link for completing the VPC setting, a connection with an ATM switching device serving as a connection port of an upper layer is selected, or A where VCC setting is frequently performed is performed.
By selecting a connection with the TM exchange, an efficient and lean connection can be set. If the frequency of connection decreases, the VP
Since the C setting is appropriately canceled, a dynamic (flexible) connection can be set instead of a static (fixed) one like the conventional VPC setting.

Further, according to the present invention, instead of the network management apparatus performing the VPC setting collectively as in the prior art, a signal from the network management apparatus is used as a simple trigger and the actual VPC is set.
Since the setting is performed by exchanging the VPC setting signal between the respective ATM switching devices, there is an effect that the present invention can be easily applied to communication over a plurality of communication networks of different network operators.

[Brief description of the drawings]

FIG. 1 is a signal sequence diagram in Embodiments 1 to 4 of the present invention.

FIG. 2 is a diagram illustrating an example of an ATM communication network configuration.

FIG. 3 is an ATM according to the first to third embodiments of the present invention.
FIG. 3 is a diagram illustrating a configuration of an exchange device.

FIG. 4 is a diagram showing a configuration example of a routing table according to the first embodiment of the present invention.

FIG. 5 is a diagram showing a configuration example of a routing table according to the second embodiment of the present invention.

FIG. 6 is a diagram showing a configuration of an ATM switching device according to a fourth embodiment of the present invention.

FIG. 7 is a signal sequence diagram showing a conventional VCC setting method.

FIG. 8 is a diagram showing a configuration of a conventional ATM switching device.

FIG. 9 is a signal sequence diagram showing another conventional connection setting method.

[Explanation of symbols]

1a-1e ATM switching device, 2a-2e connection link, 3a-3h terminal device, 4 network management device, 5a-5
i subscriber line, 11 VP / VC connection function unit, 12 subscriber line interface function unit, 13 connection link interface function unit, 131 VP / VC connection data, 13
2 ATM cell switching function, 14 control function unit, 141
Device management function, 142 VCC setting control function, 143
Network configuration information exchange function, 144 routing table,
145 own device accommodation terminal device table, 146 VPC
Setting control function, 147 Destination address monitoring function, 148
VPC usage monitoring function, 61 outgoing signal, 62 incoming signal, 63 incoming response signal, 64 outgoing response signal, 6
5a to 65c VCC setting request signal, 66a to 66cV
CC setting response signal, 67 data transfer, 68a to 68d
VP / VC connection data setting signal, 71a-71b V
PC setting request signal, 72a-72b VPC setting response signal, 8, 9 Routing table.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Isshin Oshima 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation (56) References JP-A 8-251182 (JP, A) JP-A 7-321798 (JP, A) JP-A-7-283820 (JP, A) JP-A-6-268674 (JP, A) JP-A-2-284543 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04L 12/28 H04Q 3/00

Claims (10)

(57) [Claims] 1. An ATM switching device comprising a plurality of ATM switching devices interconnected by a connection link, and a plurality of terminal devices accommodated in the ATM switching devices. replace the VCC setting signal in the fast connection setup method of ATM communication network for performing connection setting between the terminal apparatus, on the path composed of the ATM switching device of the relay and VPC settable connection link to arbitrary, the terminal For calling from device
Exchange VPC setting signal between the ATM exchanges before
Fast connection setting method of ATM communication network, wherein a logical connection to link VPC make settings Ukoto between the ATM switch by. 2. Each ATM switching device selects a connection link to be passed next by referring to a routing table having connection link option information for reaching each address corresponding to each address, and performs VPC. 2. The high-speed connection setting method for an ATM communication network according to claim 1, wherein the VPC setting is performed by transferring a setting request signal. 3. Each ATM switching device refers to a routing table having connection information between all the ATM switching devices within a specific range of the ATM communication network, so that a route to the ATM switching device to which the VPC is connected can be obtained. VPC containing the specified information
2. The high-speed connection setting method for an ATM communication network according to claim 1, wherein the VPC setting is performed by generating a setting request signal and exchanging between ATM switching devices. 4. A transmission of a control command of a VPC setting instruction from a network management device locally connected to an ATM switching device to each ATM switching device as a trigger causes each A
4. The high-speed connection setting method for an ATM communication network according to claim 1, wherein the TM switching device performs the VPC setting according to designated conditions. 5. When a routing table is generated or updated by periodically exchanging network configuration information between ATM switching devices, a condition specified in advance is satisfied,
4. The method according to claim 1, wherein the VPC setting is performed for the ATM switching device, triggered by detecting an ATM switching device for which the VPC setting has not yet been performed. High-speed connection setting method for an ATM communication network. 6. The method according to claim 4, wherein address information for directly specifying a destination ATM switching device for VPC setting is specified as a condition for VPC setting.
High-speed connection setting method for TM communication network. 7. The VPC setting is performed with all ATM switching devices that can reach the specified number of relay stages and are capable of VPC setting by designating the number of relay stages of the VPC as a VPC setting condition. Item 6. The high-speed connection setting method for an ATM communication network according to any one of Items 4 and 5. 8. In an ATM communication network having a hierarchical structure, each A
The upper layer for performing VPC setting from the TM switching device is designated as a condition of VPC setting, and A as a connection port of the designated upper layer is designated.
6. The high-speed connection setting method for an ATM communication network according to claim 4, wherein VPC setting is performed with the TM switching device. 9. A called side ATM switching apparatus which continuously monitors destination address information at the time of VCC setting by a call from a terminal device and performs VCC setting at a frequency or a cumulative frequency higher than a predetermined reference. 4. The method according to claim 1, further comprising the step of, upon detection of a VPC, triggering the VPC setting with the ATM switching device. 10. The method according to claim 6, wherein after setting the VPC by the trigger, the usage status of the VPC is continuously monitored, and if it is detected that the usage status is lower than a predetermined reference, the VPC is released. The AT according to claim 9, wherein
High-speed connection setting method for M communication network.