JPH10294775A - Subscriber line d-channel signal monitoring method in isdn - Google Patents

Abstract

PROBLEM TO BE SOLVED: To monitor a D-channel signal of a specific ISDN subscriber's line by drawing only the D-channel signal of an ISDN subscriber's line desired to monitor to a B-channel on a digital transmission path that connects a host station and an access network. SOLUTION: An access network 2 draws a D-channel of a D-channel signal monitored subscriber line 20 to a B-channel for monitoring on a V 5.2 digital transmission path from the information of a capacity position of a B-channel for monitoring in an ALLOCATION message, sent from a host station 1 and the information of a capacity position of the line 20. A B-channel for monitoring on a V 5.22 Mbits/second digital transmission path is connected to a monitor device 50, by connecting a path 30 of in a time-sharing switch 3. In this way, a D-channel signal of the D-channel signal monitored subscribed 20 is outputted to the device 50.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a specific ISN among a plurality of ISDN subscriber lines accommodated in an access network.
The present invention relates to a method for monitoring a D channel signal of an SDN subscriber line.

[0002]

2. Description of the Related Art Conventionally, ISDN (Integrated Services)
Digital Network) An example of a method for monitoring a D channel signal on a subscriber line is disclosed in Japanese Patent Laid-Open No. 2-292.
As disclosed in Japanese Unexamined Patent Publication No. 937 (hereinafter, a conventional example), there is a method performed for ISDN subscribers accommodated in a digital exchange.

[0003] The D channel signal monitoring method in the conventional example uses a dedicated D channel signal selection device to specify a D channel to be monitored. More specifically, the designation of the D channel has been performed by inputting selection information from the maintenance terminal and transmitting the selection information to the D channel signal selection device via the D channel signal selection control.

[0004]

However, the interface between the host station and the access network is a communication channel, and signals other than the D channel signal flow. Has a problem that it is not possible to monitor the D channel signal of a specific ISDN subscriber line accommodated in an access network. For example, an access network accommodating an ISDN subscriber line and a host station are ETSI (Europe)
an Telecommunication Standards Institute) V5.
If the communication channel on the V5.2 interface is monitored when monitoring the D channel information of the ISDN subscriber line in the case where the communication channel is connected by the E.2 interface (ETS 3003477-1), it is accommodated in the access network. The D channel information of all ISDN subscriber lines being monitored will be monitored.

Further, in the technology disclosed in the prior art, there is a problem that it is impossible to designate and monitor a desired D channel signal of an ISDN subscriber line without a dedicated D channel signal selection device. there were.

Therefore, an object of the present invention is to specify a specific ISDN subscriber line among ISDN subscriber lines accommodated in an access network without using a dedicated D-channel signal selection device as in the prior art. And that particular I
It is an object of the present invention to provide a subscriber line D channel signal monitoring method capable of monitoring an SDN subscriber line D channel signal.

[0007]

SUMMARY OF THE INVENTION A subscriber line D-channel signal monitoring method in an ISDN according to the present invention comprises a D-channel monitored signal ISDN accommodated in an access network.
V channel captured at the time of a monitor request for the D channel signal of the subscriber line
5.2 Pull in to B channel on 2M bits / sec digital transmission line. Therefore, the present invention provides, for example, V5.2.
Means for connecting B channel of 2M bits / sec digital transmission line and D channel of subscriber line (see FIG. 2)
And means for connecting the B channel and the D channel of the subscriber line, particularly a means for specifying the D channel of the subscriber line (see FIG. 3).

That is, according to the present invention, for an access network accommodating a plurality of ISDN subscriber lines and a B channel on a digital transmission line connecting a host station,
The plurality of ISDs accommodated by the access network
It is possible to monitor the D channel signal of the D channel by pulling in the D channel of the specific ISDN subscriber line to be monitored out of the N subscriber lines and monitoring the B channel into which the D channel is drawn. And a method for monitoring a subscriber line D-channel signal in ISDN.

More specifically, according to the present invention, the ETS
Digital transmission path for IV5.2 (or ETSI
V5.2 interface or ETS300 347
-1) IS which allocates the above B channel for D channel signal monitoring of a specific ISDN subscriber line
A method of monitoring a subscriber line D channel signal in a DN is obtained.

According to the present invention, there is provided a method for monitoring a subscriber line D-channel signal in the ISDN.
ALL used in SI V5.2 BCC protocol
I is characterized in that a change is made in the OCATION message so that the D channel can be specified as a parameter
A method of monitoring a subscriber line D channel signal in SDN is obtained.

Conventionally, as a method of monitoring a subscriber line D-channel signal in ISDN, in addition to the above-described conventional example,
For example, Japanese Patent Application Laid-Open Nos. 1-162034 and 1-2
70436, JP-A-2-94751, JP-A-2-210937, JP-A-3-99552, JP-A-5-136782, and JP-A-5-15
The technology disclosed in Japanese Patent No. 3245 is cited,
Since none of the technologies presupposes a network system provided with an access network and a host station, it is needless to say that the problems solved by the present invention cannot be achieved.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The following is a description of an embodiment of the present invention.
A method of monitoring a subscriber line D channel signal in SDN will be described with reference to the drawings.

The subscriber line D channel signal monitoring method of the present embodiment is applied to a network system including a host station 1 and an access network 2 as shown in FIG.

The host station 1 includes a time division switch 3, an operation / maintenance / call processing control device 4, a V5.2 digital transmission line control device 5, and a digital transmission line control device 6. The operation / maintenance / call processing control device 4 is configured to use V5.2 2
It manages “empty” and “blocked” of the B channel on the M bits / sec digital transmission lines 10 to 13. V5.
2, the digital transmission path control device 5 includes a plurality of V5.2.
It is connected to the access network 2 via 2M bits / sec digital transmission lines 10 to 13. The digital transmission path control device 6 houses a monitor device 50. A maintenance terminal 60 is connected to the operation / maintenance / call processing control device 4.

The access network 2 accommodates an ISDN subscriber line 20. In addition, ISDN subscriber line 20
Is connected to an ISDN subscriber terminal 40 of the ISDN subscriber.

In such a network system, the subscriber line D channel signal monitoring method in the ISDN according to the present embodiment is performed as follows with reference to FIGS. 1, 2 and 4.

First, the maintenance terminal 60 designates an ISDN subscriber terminal 40 whose D channel signal is to be monitored from the subscribers (terminals) accommodated in the access network 2 (step S101).

Next, the operation / maintenance / call processing control device 4 captures two B channels out of the vacant B channels for use in monitoring the upstream and downstream of the D channel signal, and captures the two B channels. Change the state of the B channel from “empty” to “in use (blocked)” (step S
102).

Further, information on the accommodating positions of the two captured B-channels for monitoring and the ISDN subscriber line 20 to be monitored by the D-channel signal (D-channel signal monitor subscriber line 20; Same in the form of.)
Is transmitted to the access network 2 (step S103).

In the access network 2, the host station 1
Based on the information on the accommodation positions of the two B channels for monitoring and the information on the accommodation positions of the D-channel signal monitor subscriber line 20 sent from the V5.22M bit for monitoring,
The D channel of the D-channel signal monitor subscriber line 20 is pulled into the B channel on the s / sec digital transmission line (step S104). Here, the connection between the B channel and the D channel in step S104 is performed twice, for monitoring in the up direction and for monitoring in the down direction.

Finally, by connecting the path 30 in the time division switch 3, the B channel captured for monitoring on the V5.22M bits / sec digital transmission line is connected to the monitor device 50 (step S10).
5).

In this way, the D channel to be monitored is drawn into the B channel captured for monitoring, and the B channel is connected to the monitor device 50, whereby the D channel of the D channel signal monitor subscriber line 20 is connected. The channel signal is output to the monitor device 50. That is,
D-Channel Signal Monitor The D-channel signal of the subscriber line 20 can be monitored.

[0023]

EXAMPLES The above-described embodiment will be described more specifically as an example.

The subscriber line D channel signal monitoring method of this embodiment is applied to a network system including a host station 1 and an access network 2 as shown in FIG.

The host station 1 includes a time division switch 3, an operation / maintenance / call processing control device 4, a V5.2 digital transmission line control device 5, and a digital transmission line control device 6. The operation / maintenance / call processing control device 4 is configured to use V5.2 2
It manages “empty” and “blocked” of the B channel on the M bits / sec digital transmission lines 10 to 13. V5.
The digital transmission line control device 5 for 2 is composed of four V5.2
It is connected to the access network 2 via 2M bits / sec digital transmission lines 10 to 13. V5.2 2M
The time slot of the bits / second digital transmission line 10 is used for a communication channel. Used to carry the D-channel signal of the accommodated ISDN subscriber. The digital transmission path control device 6 includes a monitor device 5
Contains 0. The operation / maintenance / call processing control device 4
Is connected to a maintenance terminal 60. The access network 2 includes an analog subscriber line, an ISDN basic (2B + D) subscriber line, and an ISDN primary (30
B + D) Can accommodate subscriber lines. In this embodiment, an ISDN basic subscriber (terminal) whose D-channel signal monitoring is to be performed is indicated by reference numeral 40 in the figure, and the ISDN subscriber line is indicated by reference numeral 20.

The operation of this embodiment will be described below.
This will be described with reference to FIGS.

First, the maintenance terminal 60 uses the ISD of the access network 2 to monitor the D channel signal.
The N subscriber terminal 40 is designated by a telephone number (step S1).
01).

Next, the operation / maintenance / call processing controller 4 captures two B channels out of the vacant B channels for use in monitoring the upstream direction and the downstream direction of the D channel signal. Change the state of the B channel from “empty” to “in use (blocked)” (step S
102).

Further, information on the accommodation position of the ISDN subscriber line 20 to be monitored by the D-channel signal (D-channel signal monitor subscriber line 20; hereinafter the same in this embodiment) and the two captured The information on the accommodation position of the monitor B channel is sent to the access network 2 (step S103). Here, in this embodiment, it is assumed that the identification number of the digital transmission path for V5.2 and the B channel number on the digital transmission path for V5.2 are transmitted as information of the accommodation position of the B channel. In addition, the transmission method includes, as shown in FIG. 3, ETSI V5.2.
BCC (Bearer Channel Connection: Bearer C
HANnel Connection) ALLOCATION / ALLOCATION messages used in the protocol
COMPLETE is used. 2 times ALL
OCATION-ALLOCATION COMPLE
In the TE sequence, as described above, the pull-in to the two B channels for monitoring the upstream D-channel signal and for monitoring the downstream D-channel signal is completed.

In this embodiment, in order to perform this pull-in, as shown in FIG.
ISDN Port, an information element in the ON message
Time Slot Identification
Will be added to the field. The field to be added is D channel info in FIG.
motion field (* 1) and D channel
el This is a pull-in information field (* 2). Also,
In FIG. 3, A for monitoring the upstream D-channel signal
In the LLOCATION message, D c
"1" is specified in the channelinformation field, and "0" is specified in the D channel pull-in information field. On the other hand, in the ALLOCATION message for monitoring the D-channel signal in the downlink direction, the D channel information is included.
"1" is designated in the field and "1" is designated in the D channel pull-in information field.

In the access network 2, the host station 1
From the information on the accommodation position of the monitoring B channel in the ALLOCATION message transmitted from the host and the information on the accommodation position of the D-channel signal monitor subscriber line 20, V5.
The D channel of the D-channel signal monitor subscriber line 20 is pulled into the monitoring B channel on the digital transmission line for 2 (step S104).

Finally, by connecting the path 30 in the time division switch 3, the monitor B channel on the V5.22M bits / sec digital transmission line is connected to the monitor device 50 (step S105).

In this way, the D channel signal of the D channel signal monitor subscriber 20 is output to the monitor device 50.

In this embodiment, the maintenance terminal 6 relating to the ISDN subscriber terminal whose D channel signal is to be monitored.
Although the designation from 0 is performed according to the telephone number, the designation may be made using the accommodation position as shown below. That is, in ETSI V5.2, the accommodation position of the ISDN subscriber line 20 accommodated in the access network 2 is represented by an EF address (Envelpe Function Address). Also, the ISD of the D-channel signal monitor
The N subscriber (terminal) 40 may be not only an ISDN basic subscriber but also an ISDN primary subscriber, and may be specified by a telephone number and / or an accommodation location (EF address).

[0035]

As described above, according to the present invention, only the D channel signal of the ISDN subscriber line to be monitored is transmitted to a digital transmission line for connecting a host station and an access network, for example, V5.2. Of the ISDN subscriber line accommodated in the access network by monitoring the D channel signal of the subscriber line by pulling in the B channel on the digital transmission path of The D channel signal of the line can be monitored.

At this time, a special D like a conventional example is used.
There is no need to have a channel signal selection device.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of an access network and a host station for explaining a subscriber line D channel signal monitoring method in an ISDN according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a subscriber line D channel signal monitoring method in the ISDN of the present embodiment.

FIG. 3 is a diagram showing an ETIs V5.2 bearer channel allocation sequence.

FIG. 4 is an information element ISDN Port Time Slot Id in an ALLOCATION message.
It is a figure which shows the content of the identification.

[Explanation of symbols]

Reference Signs List 1 host station 2 access network 3 time division switch 4 operation / maintenance / call processing controller 5 digital transmission path controller for V5.2 6 digital transmission path controller 10 V5.2 2M bits / sec digital transmission path (with C channel) Reference Signs List 11 V5.2 2M bits / sec digital transmission line 12 V5.2 2M bits / sec digital transmission line 13 V5.2 2M bits / sec digital transmission line 20 ISDN subscriber line 30 path 40 ISDN subscriber terminal 50 monitoring device 60 maintenance Terminal

Claims (3)

[Claims] 1. A method of monitoring a subscriber line D-channel signal in ISDN, wherein a B channel on a digital transmission line for ETSI V5.2 is allocated for monitoring a D-channel signal of a specific ISDN subscriber line. 2. The method for monitoring a subscriber line D-channel signal in ISDN according to claim 1, wherein A used in an ETSI V5.2 BCC protocol.
D as a parameter in the LLOCATION message
A method for monitoring a subscriber line D-channel signal in ISDN, wherein a change is made to designate a channel. 3. An access network accommodating a plurality of ISDN subscriber lines and a B channel on a digital transmission line connecting a host station, among the plurality of ISDN subscriber lines accommodated by the access network, An ISDN characterized in that a D channel of a specific ISDN subscriber line to be monitored is pulled in and a D channel signal of the D channel is monitored by monitoring a B channel in which the D channel is drawn.
The method of monitoring the subscriber line D channel signal in the above.