JPS62144495A - Remote line concentrating device - Google Patents

Abstract

PURPOSE:To reduce the number of expensive photoelectric converters and to obtain an economical remote radio equipment by providing a high speed line concentrating switch unit in a subscriber's line terminating office, concentrating the lines and connecting it with a common high speed distribution switch part. CONSTITUTION:In respective station terminating circuits 111, high speed digital information is separated from a signal channel. The high speed digital information is inputted to the high speed line collecting switch unit 112 and transmitted to a connection cable 40 between the units through the line concentrating photoelectric converter 60. The signal channel is accommodated in a signal channel multiplex separation circuit 113 and multiplexed to one signal highway 45. In a high speed line concentrating switch control information extracting circuit 114, a specific time slot from the high way 45 is extracted, the control order of the unit 112 is supplied to a switch control part 115, and the control part 115 controls the unit 112 based on this order. The high speed distribution switch part 120 draws the high speed digital information from the respective subscriber's line terminating office device 110 through the cable 40 and distributes the high speed digital information.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention is a method of concentrating subscriber terminal devices that handle image information and high-speed digital information using a remote concentrator, and then transmitting them to a master station via a relay transmission path. This invention relates to improvements in remote line concentrators that are used in distributed remote control electronic switching systems, and in particular are capable of connection within their own station.

[) Already required]

The present invention provides a remote line concentrator that is equipped with a plurality of subscriber line terminal devices accommodating a plurality of subscriber terminal devices and has a self-internal connection means, in which the subscriber line terminal device is separated from the subscriber line in the subscriber line terminal device. It includes a high-speed concentrator switch unit that concentrates high-speed digital information, and the high-speed concentrator switch unit is controlled by a switch control order extracted from a signal highway that is separated from the subscriber line and multiplexed, and the high-speed concentrator switch unit is controlled via an inter-frame connection cable. By sending the data to the in-office reading means that is commonly located in each subscriber line terminal equipment, the number of inter-frame connection cables can be reduced in accordance with the concentration ratio of the high-speed line concentration switch unit, and This makes it possible to reduce the number of photoelectric converters required when an optical fiber cable is used for the cable.

[Conventional technology]

Conventionally, an economical and small-scale high-speed/broadband switching network connects a subscriber terminal device 2 such as a high-speed, wideband image terminal device to a remote concentrator 100 via an optical subscriber line cable 30, as shown in FIG. Once accommodated and concentrated here,
A method has been adopted in which distribution is performed by the master station distribution device 3 via the relay transmission line 50.

FIG. 4 is a block diagram showing the inside of a conventional remote line concentrator 100'.

In FIG. 4, a remote line concentrator 100' includes a plurality of subscriber line terminal devices 110', a high-speed line concentrator switch section 130,
It is composed of a signal processing device 140 and a common control device 150. The subscriber line terminal equipment 110' and the high-speed line concentrator switch section 130 are each constructed of dedicated racks, and an optical fiber cable is adopted as the inter-frame connection cable 40 in consideration of transmission characteristics. Therefore, opto-electrical converters 60 are installed on the high-speed line concentration switch section 130 side and the subscriber line terminal equipment 110' side, respectively, corresponding to the optical fiber cables. The high-speed digital information condensed by the high-speed concentrator switch section 130 is converted into an optical signal by the opto-electrical converter 60 and then accommodated in the master station distribution device 3 via the digital information relay transmission line 51.

The subscriber line terminal equipment 110' includes an intra-office termination circuit 111 and a signal channel multiplexing/demultiplexing circuit 113. Local termination circuit 1
11 is installed on a one-to-one basis via the subscriber terminal device 2 and the optical subscriber line cable 30, and has an optical multiplexing/demultiplexing function, a photoelectric conversion function, a multiplexing/demultiplexing function of high-speed digital information and signal channels, and a function for sending and receiving calls. It has line setting functions, etc. The signal channel multiplexing/demultiplexing circuit 113 multiplexes only the signal channels separated by the intra-office termination circuit 111 onto one low-speed signal highway 45. The signal highway 45 created from each subscriber line terminal device 110' is connected to the signal processing device 14.
It is stored all at once in 0. The signal processing device 140 detects outgoing/incoming call signals, connection numbers, etc. sent from each subscriber terminal device 2, and executes call processing. The common control device 150 performs switch control of the high-speed line concentrator switch section 130, and controls the signal processing device 1.
40 and a dedicated signal relay transmission path 52, communication control with the master station distribution device 3 is executed.

[Problem that the invention seeks to solve]

A plurality of such remote concentrators 1oO' are connected to a relay transmission line 5.
0 (51, 52) in the master station distribution device 3, the key point is how to economically configure the remote line concentrator 100'.

However, in the configuration of the conventional remote line concentrator 100', the subscriber line terminal unit 110' and the high-speed line concentrator switch section 130 are
If an optical fiber is used for the interconnection cable 40 between the It was a disadvantageous configuration.

The present invention solves these conventional problems,
The purpose of the present invention is to reduce the number of expensive photoelectric converters and provide a remote line concentrator with an economical configuration.

[Means for solving problems]

The present invention provides an in-office termination circuit that is installed for subscriber lines and separates and multiplexes high-speed digital information signals and signal channels of the subscriber line, and a signal channel demultiplexer that connects the signal channels and a single signal highway. A plurality of subscriber line terminal devices including circuits, a means for accommodating high-speed digital information signals of each subscriber line terminal device and connecting within the local station and to the master station distribution device, and connecting to the signal highway. In a remote line concentrator including a signal processing means for executing call processing, and a control means for controlling communication between the signal processing means and the above-mentioned master station distribution device, the subscriber line terminal device has the high-speed The present invention is characterized by comprising a high-speed line concentration switch unit that concentrates digital information, a switch control section that controls this high-speed line concentration switch unit, and an extraction means that extracts a switch control order from the signal highway to this switch control section. do.

[For production]

The present invention separates a high-speed line concentration and distribution switch section common to each conventional subscriber line terminal unit into a high-speed line concentration switch section and a high-speed distribution switch section. This high-speed line concentrator switch unit is installed in each subscriber line terminal equipment, and after concentrating the high-speed digital information signals separated by the in-office termination circuit, they are sent to each subscriber line terminal equipment via an interframe connection cable. By sending out to a common high-speed distribution switch section, the number of interframe connection cables can be reduced according to the concentration ratio.

In addition, the control of the high-speed line concentrator switch unit inserts a control order into the empty time slot of the signal highway separated and multiplexed by the in-office termination circuit, and extracts only a simple specific time slot in the subscriber line end station equipment. This can be easily realized by providing a means to extract it and controlling it with a switch.

This device concentrates bidirectional communications sent and received from subscriber terminals.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention. In FIG. 1, a plurality of subscriber terminal bags R2 are accommodated in a subscriber line terminal equipment 110 via respective optical subscriber line cables 30. In FIG.

The subscriber line terminal device 110 connects each optical subscriber line cable 30
an in-office termination circuit 111 corresponding to the in-office termination circuit 111, a high-speed concentrator switch unit 112 to which the output of the in-office termination circuit 111 is connected, a signal channel demultiplexer circuit 113, and a high-speed concentrator switch control information extraction circuit connected to the output of the signal channel demultiplexer circuit 113. 114 and a switch control section 115 that controls the high-speed concentrator switch unit 112 using this output.
Consisted of.

The output of the high-speed concentrator switch unit 112 is connected to the high-speed distribution switch unit 120 via a photoelectric converter 60 and an interframe connection cable 40 . Further, a high-speed digital information relay transmission line 51 is connected to the high-speed distribution switch section 120 via a photoelectric converter 60.

The output of the signal channel multiplexing/demultiplexing circuit 113 is sent to the high-speed concentrator switch control information extraction circuit 114 and the signal highway 4.
A signal processing unit 140 is connected via 5.

The common control unit 150 connected to the signal relay transmission line 52 includes a high-speed distribution switch unit 120 and a signal processing unit 140.
is connected.

Each in-office termination circuit 111 separates high-speed digital information and signal channels. The high-speed digital information is input to the high-speed concentrator switch unit 112, condensed, and sent to the interframe connection cable 40 via the opto-electrical converter 60. The signal channels are accommodated in a signal channel demultiplexing circuit 113 and multiplexed into one signal highway 45.

A high-speed concentrator control information extraction circuit 114 inserted into the signal highway 45 extracts a specific time slot from the signal highway 45 and supplies a control order for the high-speed concentrator switch unit 112 to the switch control section 115. The switch control unit 115 performs editing based on this control order and executes control of the high-speed line concentration switch unit 112.

The high-speed distribution switch section 120 transfers high-speed digital information from the plurality of subscriber line terminal devices 110 to the inter-frame connection cable 4.
0 through which high-speed digital information is distributed.

In FIG. 1, the number of interframe connection cables 40 for high-speed digital information transmission between one subscriber line terminal unit 110 and the high-speed distribution switch unit 120 is shown as one, but the line concentration ratio of the high-speed line concentration switch unit 112 is It is clear that the number of cables varies depending on the subscriber line terminal equipment 110.

The signal highway 45 created from each subscriber line terminal device 110 is collectively accommodated in the signal processing device 140.

The common control device 150 has functions of controlling the high-speed distribution switch Sochi section 120, controlling the signal processing device 140, and communicating with the master station distribution device 3 via the dedicated signal relay transmission path 52.

FIG. 3 is a diagram showing an example of the highway format of the signal highway 45. In FIG. 3, one frame includes a time slot F for frame synchronization, and a time slot S for controlling the high-speed line concentrator switch unit 112.
W, n time slots S O, S corresponding to the number of subscriber terminal devices accommodated in one subscriber line terminal device 110;
I, '-1Sfi-1. Each time slot s
, , s, , -1Sn-1 indicates subscriber line signal information for each subscriber terminal device.

By drawing in all the signal highways 45, the signal processing device 140 can know the calling status and connection number of each subscriber terminal device. As a result, it is determined which subscriber terminal device accommodated in which subscriber line terminal device 110 is to be connected, and the control order of the high-speed line concentrator switch unit 112 is sent to the time slot SW of the corresponding signal highway 45. Once set, it becomes possible to easily control the concentration of subscriber lines. Communication between terminals accommodated in subscriber line terminal equipment 110, that is, remote line concentrator 10
When performing an intra-office connection within 0, it is performed via the high-speed distribution switch section 120.

In this way, a dedicated high-speed line concentrator switch unit 112 is installed in the subscriber line terminal equipment 110 to only concentrate high-speed digital information, and connections within the local office between subscriber line terminal equipment or between subscriber terminal equipment are made. , by a commonly installed high-speed distribution switch section 120. Therefore, even if subscriber line terminal equipment 110 and high-speed distribution switch section 120 are configured in different racks, the number of inter-frame connection cables can be reduced to the number of wires condensed by high-speed line concentrator switch unit 112.

〔Effect of the invention〕

As explained above, in the present invention, when optical fiber cables are used as interframe connection cables, the number of expensive opto-electrical converters can also be reduced by reducing the number of fiber optic cables.

In addition, the control order sending method for controlling the high-speed concentrator switch unit in each subscriber line terminal equipment uses empty time slots on the signal highway, and only a simple specific time slot is placed in the subscriber line terminal equipment. This can be easily realized by simply installing a high-speed concentrator switch control information extraction circuit that extracts the information.

In this way, rather than providing a high-speed line concentrator switch unit with a connection function within its own station, a small high-speed line concentrator switch unit is installed in the subscriber line terminal equipment, and after concentrating the lines, it is possible to perform high-speed distribution common to each subscriber line terminal equipment. By connecting to the switch section, it is possible to reduce the number of interframe connection cables, which has the effect of making it possible to construct an economical remote line concentrator.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention. FIG. 2 is a block configuration diagram showing the communication network configuration of the high-speed broadband switching system. FIG. 3 is a diagram showing an example of a highway format of a signal highway. FIG. 4 is a block diagram showing an example of a conventional remote line concentrator. 2... Subscriber terminal device, 3... Master station distribution device, 3o
... Optical subscriber line cable, 40... Interframe connection cable, 45... Signal highway, 50... Relay transmission line, 51... Relay transmission line for digital information, 52...
Signal relay transmission line, 6°...optoelectric converter, 100.1
00'...Remote line concentrator, 110.110'...
・Subscriber line terminal equipment, 111... In-office termination circuit, 11
2... High-speed line concentration switch unit, 113... Signal channel multiplexing and separation circuit, 114... High-speed line concentration switch unit.
Sochi control information extraction circuit, 115... switch control unit,
120... High-speed distribution switch unit, 130... High-speed line concentration switch unit, 140... Signal processing device, 150...
・Common control device. Patent applicant NEC Corporation,. Representative Patent Attorney Nao Ide 〒, Pa.

Claims (1)

[Claims] (1) An in-office termination circuit (111) that is installed for subscriber lines and separates and multiplexes subscriber line high-speed digital information signals and signal channels, and a signal channel that connects the above signal channels and a single signal highway. Demultiplexing circuit (1
13), a means for accommodating high-speed digital information signals of each subscriber line terminal device, and connecting within the local station and with the master station distribution device; In a remote line concentrator (100) connected to a signal highway and including a signal processing means (140) for executing call processing, and a control means (150) for controlling communication between this signal processing means and the above-mentioned master station distribution device. The subscriber line terminal equipment (110) includes a high-speed line concentration switch unit (112) for concentrating the high-speed digital information, a switch control section (115) for controlling the high-speed line concentration switch unit, and a switch from the signal highway. A remote line concentrator comprising an extracting means (114) for extracting a switch control order to the switch control unit.