JP3129196B2 - D-channel packet concentrator method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an ISDN (integr)
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exchange for accommodating subscribers, and more particularly to an office exchange having a function of multiplexing a D-channel packet in a frame and sending the multiplexed packet to an external packet handler.

[0002]

2. Description of the Related Art Conventionally, in this kind of ISDN exchange, as described in, for example, Japanese Patent Application Laid-Open No. 62-90065, the influence on the subscriber exchange is minimized on the same subscriber line. There have been proposed ones that can commonly receive services such as circuit switching and packet switching.

FIG. 3 is a block diagram showing a schematic configuration of a conventional ISDN exchange described in the above-mentioned Japanese Patent Application Laid-Open No. 62-90065.

Referring to FIG. 3, a packet terminal 1 is accommodated in a subscriber's circuit 2 and is separated by a demultiplexing / multiplexing circuit 3 from a B / B
The channel and the D channel are separated, and the B channel and the D channel of a plurality of subscribers are respectively multiplexed. The multiplexed B channels are stored as they are in the line concentrator switch 4b and are condensed here. On the other hand, the multiplexed D channel is directly accommodated in the D channel terminating device 5b without passing through the concentrator switch 4b, where the D channel layer 2 protocol LAPD (link access procedure) is used.
ure on the D channel), and the packet data is transmitted to the packet handler interface device 6 through the frame multiplex line 7.

[0005]

Generally, in the case of D-channel packets, the usage rate per subscriber is not so large, and even when a large number of ISDN subscribers are accommodated, the D-channel packets actually processed inside the exchange. And the utilization rate of the data line after frame multiplexing transmitted from one D-channel terminator is low.

However, the conventional IS as described above
In the DN switch, since the D channel terminating device 5b is installed in each of the demultiplexing / multiplexing circuits 3, if the number of ISDN subscribers is large, even if the traffic per subscriber is low, the D channel termination device 5b becomes
The number of the channel terminating devices 5b required is equal to the number of the demultiplexing / multiplexing circuits 3.

In the conventional ISDN exchange as described above, replacement of the subscriber circuit 2 and replacement of the MDF jumper are required in order to concentrate packet subscribers on a specific D channel terminator 5b.

Accordingly, the present invention has been made in view of the above-mentioned circumstances, and even when a large number of low-traffic packet subscribers are dispersed and accommodated, a specific D-channel termination device can be used without performing any work or the like. It is an object of the present invention to provide a D-channel packet concentrating method that enables frame multiplexing of D-channel packets.

[0009]

In order to achieve the above object, the present invention separates a plurality of ISDN subscriber accommodating apparatuses, a B channel and a D channel on a line, and time-multiplexes the plurality of channels. A demultiplexer / multiplexer, a concentrator switch accommodating the multiplexed B and D channels,
A D-channel terminator for terminating the D-channel from the concentrator switch; and a packet for transmitting B-channel data from the concentrator switch and D-channel data transmitted by frame multiplexing from the D-channel terminator to an external packet handler. and handlers interface device, wherein the D
Traffic information of ISDN subscribers from channel termination equipment
And a management device for collecting resources and managing resources.
When multiplexing channel packets and sending them to the external packet handler, the D channel data sent from the demultiplexing / multiplexing circuit is passed through the concentrator switch, and the D channel terminating device performs LAPD processing and frame multiplexing processing. D-channel packet concentrator
And the management device communicates with the D-channel termination device.
Based on the traffic information of the ISDN subscriber being monitored
One D-channel termination device lacks processing capacity
When it becomes, set the path of the concentrator switch to another D
The ISDN subscriber is also accommodated in the channel terminating device .

[0010] The D-channel packet concentrator according to the present invention further includes a management device for collecting traffic information of ISDN subscribers from the D-channel termination device and managing resources.

According to the D-channel packet concentrating method of the present invention, the ISDN exchange having a frame multiplexing function and a packet handler interface function is accommodated in a plurality of demultiplexing / multiplexing circuits. By processing the D-channel packet data by one D-channel terminating device, it becomes possible to effectively use the line inside the exchange.

[0012]

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing a system configuration of a D-channel packet concentrator system according to an embodiment of the present invention.

Referring to FIG. 1, a preferred embodiment of the present invention comprises a plurality of packet terminals 1, a plurality of subscriber circuits 2 accommodating each of the plurality of packet terminals 1, a B channel on a line, and A demultiplexing / multiplexing circuit 3 for demultiplexing the D channel and time-division multiplexing a plurality of channels;
Concentrator switch 4a accommodating channel and D channel
And a D-channel terminator 5 for terminating the switched D-channel in a time division multiplexed manner from the concentrator switch 4a.
a, the B channel data from the concentrator switch 4a and the D multiplexed by the D channel terminating device 5a and transmitted.
A packet handler interface device 6 for sending channel data to an external packet handler; and a management device 8 including online software for collecting ISDN subscriber traffic information from the D channel terminating device 5a and performing resource management.

The line data of the packet terminal 1 is accommodated in a subscriber circuit 2, a plurality of subscriber circuits 2 are grouped together, and a demultiplexing / multiplexing circuit 3 separates B channels / D channels. The subscriber's B and D channels are each multiplexed. Further, the plurality of demultiplexing / multiplexing circuits 3 are line-sharing switches 4 which are time-division switches.
a and is concentrated here. In this case, an appropriate value is set in advance for the line concentration ratio according to the traffic data of the ISDN subscriber. For the packet subscribers among the ISDN subscribers, a specific D-channel termination device is determined by the station data of the software. The path of the concentrator switch 4a is set so as to concentrate on the path 5a.

FIG. 2 is a block diagram showing the configuration of the D-channel termination device 5a shown in FIG. Referring to FIG. 2, the D-channel termination device 5a
Frame multiplexing means 10 and traffic monitoring means 11
And

Referring to FIG. 1 and FIG. 2, the D channel terminating device 5a terminates the D channel from the concentrator switch 4a by the LAPD terminating means 9, and the SAPI (service access point identifier) in the address field. The call control signal (SA
PI = 0) and a D channel packet (SAPI = 16). For the D channel packet, after converting the address field, the frame multiplexing means 10
, And sends out a D-channel packet frame to the packet handler interface device 6 through the frame multiplexing line 7.

The packet handler interface device 6 multiplexes the D channel packet frame from the D channel terminating device 5a and the B channel data from the concentrator switch 4a and sends them to the external packet handler.

When there is a change in the subscriber information of the packet terminal 1, the management device 8 recognizes the change and changes the path to the concentrator switch 4a so that the D is always changed.
Packet subscribers are concentrated and accommodated in the channel terminating device 5a.

The traffic of the packet subscriber is D
The traffic is continuously monitored by the traffic monitoring means 11 of the channel terminating device 5a. When one D-channel terminating device runs out of processing capacity, the information is notified to the management device 8, and the path of the concentrator switch 4a is notified by the management device 8. May be set to accommodate packet subscribers in other D-channel terminating devices.

[0021]

As described above, according to the present invention,
In an ISDN exchange having a frame multiplexing function and a packet handler interface function, even if the traffic of the D channel packet per packet subscriber is low, one D channel terminator concentrates the frame multiplexing of the D channel packet. In addition, even when the accommodation of the subscriber is changed, it is possible to deal with the order from online software or the like without changing the construction.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a system configuration of a D-channel packet concentration system according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating a configuration of a D-channel termination device according to an embodiment of the present invention.

FIG. 3 is a block diagram showing a configuration of a conventional ISDN exchange.

[Explanation of symbols]

 Reference Signs List 1 packet terminal 2 (ISDN) subscriber circuit 3 separation / multiplexing circuit 4a (common for B channel / D channel) concentrator switch 4b (for B channel) concentrator switch 5a, 5b D channel termination device 6 packet handler interface device 7 frame multiplexing Line 8 Management device 9 LAPD terminating means 10 Frame multiplexing means 11 Traffic monitoring means

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04L 12/56 H04L 12/02 H04Q 11/04

Claims (1)

(57) [Claims] An apparatus for accommodating a plurality of ISDN subscribers, a separation / multiplexing circuit for separating a B channel and a D channel on a line and time-division multiplexing the plurality of channels, a multiplexed B channel and a D channel A D-channel terminator for terminating the D-channel from the concentrator switch; B-channel data from the concentrator switch; and D-channel data transmitted by frame multiplexing from the D-channel terminator. A packet handler interface device for sending a packet to an external packet handler; and a management device for collecting traffic information of ISDN subscribers from the D channel terminating device and managing resources. When transmitting to the packet handler, the D channel transmitted from the demultiplexing / multiplexing circuit A D-channel packet concentrator system in which data passes through the concentrator switch and performs LAPD processing and frame multiplexing processing by the D-channel terminating device, wherein the management device is configured to monitor an ISDN subscriber monitored by the D-channel terminating device. Based on the traffic information, when one D-channel termination device runs out of processing capacity, the path of the concentrator switch is set so that other D-channel termination devices can accommodate ISDN subscribers. D-channel packet concentrator method.