JPH09102992A - Method for housing analog idsn subscriber into exchange for analog isdn - Google Patents

Abstract

PROBLEM TO BE SOLVED: To economically house a certain subscriber through a subscriber distributor into an exchange for an ISDN subscriber after housing a certain subscriber in a remote multiplex transmitter while being mixed with the other subscriber. SOLUTION: When converting a supervisory/control signal related to a subscriber I at a subscriber distributor 2, the quantity of the hardwares for supervisory/control converting circuits 9 and 14 for subscriber I is provided corresponding to the number of really housed subscribers I-22. Then, the signal is economically converted while being supported by line concentration switches 8 and 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote multiplexing transmission apparatus in which analog subscribers and ISDN subscribers scattered in remote areas are mixedly accommodated, and a time division multiplexing transmission line and subscriber distribution apparatus are provided. Through an analog subscriber exchange, respectively
Analogs adapted to be accommodated in the ISDN subscriber exchanges / ISDN subscriber analogs /
The number of ISDN subscribers accommodated in the ISDN switch, particularly, the ISDN subscriber monitor / control signal conversion hardware provided in the subscriber distribution device is the number of ISDN subscribers actually accommodated. The present invention relates to a method of accommodating an analog / ISDN subscriber in an analog / ISDN exchange, which can be completed according to the above.

[0002]

2. Description of the Related Art FIG. 2 shows a case where an analog subscriber (hereinafter referred to as an A subscriber) and an ISDN subscriber (hereinafter referred to as an I subscriber) are accommodated in an analog subscriber exchange and an ISDN subscriber exchange, respectively. Here is a general accommodation method. As shown in the figure, each of the A subscriber 101 and the I subscriber 102 scattered at remote locations is once housed together in the remote multiplex transmission equipment 200, and further, the time division multiplexing optical transmission line 300 and the subscriber distribution equipment 400 are provided. The subscribers are accommodated as distributed states to the analog subscriber exchanges 501 and 502 and the ISDN subscriber exchange 503, respectively. By the way, the remote multiplex transmission device is referred to as "A / I subscriber line single station device for optical subscriber line multiplex transmission system"("NTT R & D
In accordance with the method disclosed in Vol. 40 No. 6 1991), the A subscriber and the I subscriber are accommodated in itself, and the voices from the A subscriber and the I subscriber are transmitted on one upstream transmission path. Functions to time-division-multiplex data and supervisory signals and send them to the subscriber distribution device, while receiving data and control signals sent from the subscriber distribution device in a multiplexed state via one downlink transmission path. It is supposed to do.

FIG. 3 also shows a concrete accommodating method in an example according to the prior art when accommodating A subscribers and I subscribers respectively in an analog subscriber exchange and an ISDN subscriber exchange. It is a thing. As shown in the figure, on the upstream time division multiplexing optical transmission line 301 which constitutes the time division multiplexing optical transmission line 300, the data and the supervisory signal are time-division multiplexed as a separated state on the time slot (TS). In particular, regarding the supervisory signal, in order to improve the accommodation efficiency of the subscribers on the transmission path, the supervisory signal for a plurality of subscribers is in the multi-frame (MF) direction within 1TS for each subscriber type. It is sent to the subscriber distribution device 400 in a multiplexed state. In the example shown in FIG. 3, it is assumed that the TSs in which the supervisory signals from the A and I subscribers are multiplexed are different, but the supervisory signals from the A subscribers are for 16 subscribers in 1 TS, and I subscribers. The supervisory signal from the person is sent to the subscriber distribution device 400 as a state in which two subscribers are accommodated in one TS. Therefore, if the positions of the TSs in which the supervisory signals from the A subscribers and the I subscribers are multiplexed are known in advance, the subscriber distribution device 400 can use the TSs.
Each can be easily separated and extracted by the A / I separation unit for each subscriber type. TS separated and extracted for each subscriber type
After that, each of them is decomposed into a supervisory signal for each subscriber by each of the A subscriber signal conversion circuit and the I subscriber signal conversion circuit. The supervisory signal for each subscriber from the A subscriber signal conversion circuit is MF-free, and the supervisory signal for each subscriber from the I subscriber signal conversion circuit is 4MF (effectively 3MF configuration, 1MF). The signal is converted into a signal indicating that the data from the same subscriber and the time position (corresponding to the TS number) are made to correspond to each other, and then the A / I signal is converted. It is distributed and accommodated in each of the analog subscriber exchange 501 and the ISDN subscriber exchange 503 through a multiplexer (not shown) and a time switch (not shown).

The above description is for the up direction, but for the down direction, the analog subscriber switch 5 is used.
2M per subscriber from 01 to subscriber distribution device 400
The control signal of F is multiplexed for 16 subscribers in the MF direction in 1TS on the time division multiplexed optical transmission line 302 via a time switch (not shown), a subscriber signal conversion circuit, and an A / I multiplexer. It is to be sent out in a converted state. Further, a control signal of 4 MF per subscriber from the ISDN subscriber switch 503 is transmitted through a time switch (not shown), an I subscriber signal conversion circuit, and an A / I multiplexer, and a downstream time division multiplexing optical transmission line is provided. On the 302, it is transmitted as a state in which two subscribers are multiplexed in the MF direction in one TS.

Incidentally, regarding this kind of technology,
For example, Japanese Examined Patent Publication No. 7-56961 (subscriber line multiplexing system) is known. In this case, at least one virtual container accommodates a plurality of analog subscriber line signals or a plurality of digital subscriber line signals and signaling information, and is provided with a virtual container multiplexing means and a control channel multiplexing means. As a result, the analog subscriber line signal or the digital subscriber line signal can be efficiently accommodated, and the transition from the analog subscriber to the digital subscriber can be easily performed.

[0006]

By the way, the subscriber A,
It is said that I subscribers are mixedly accommodated in the remote multiplex transmission equipment, and are separately accommodated in the analog subscriber exchange and the ISDN subscriber exchange through the time division multiplexing optical transmission line and the subscriber distribution equipment, respectively. Up to now, the I / subscriber monitoring / control signal conversion circuit provided in the subscriber distribution device has been required to have a large amount of hardware. Generally, the amount of hardware of these signal conversion circuits is I
This is because the hardware amount of these signal conversion circuits is determined on the assumption that only the I subscribers are fully accommodated, although it is necessary and sufficient according to the number of accommodated subscribers. is there. This is because I subscribers are not actually accommodated at all at present, or their accommodation capacity is small, but it is considered that the accommodation capacity tends to increase gradually in the future. . That is, the conventional method of accommodating the A / I subscriber in the analog / ISDN exchange cannot accommodate the I subscriber economically.

Therefore, an object of the present invention is to accommodate both A subscribers and I subscribers in the remote multiplex transmission equipment in a mixed manner, and to provide an analog subscriber exchange through the time division multiplex transmission line and the subscriber distribution equipment, respectively. An object of the present invention is to provide a method for accommodating an analog / ISDN subscriber in an analog / ISDN exchange so that an I subscriber can be economically accommodated in the ISDN exchange when the ISDN subscriber exchange is distributed and accommodated.

[0008]

SUMMARY OF THE INVENTION The above object is to provide a subscriber distribution device in which each time slot for supervisory signal multiplexing from an upstream time division multiplexing transmission line is once for each subscriber type according to the time slot position. After being separated and extracted, the signal is converted into a supervisory signal of one time slot per one subscriber, and then, when multiplexed again, of the supervisory signal multiplexing time slots separated and extracted as the I subscriber type, Signal conversion for time slots in the vacant state is not performed via the time switch, and for time slots other than the time slots in the vacant state, the time slot positions are exchanged and one time slot per subscriber A supervisory signal converted into a supervisory signal and converted into one time slot per subscriber for each subscriber type Each analog subscriber exchange via a time switch in a state that is multiplexed again, I
The control signals of one time slot per subscriber from each of the analog subscriber exchange and the ISDN subscriber exchange are input to the SDN subscriber exchange according to the time slot position via the time switch. When signals are converted into control signal multiplexing time slots in which multiple control signals are multiplexed in the same time slot for each subscriber type, and then transmitted on the downlink time division multiplexing transmission line in a multiplexed state. The control signal multiplexing time slots of the I subscriber type are multiplexed with the control signal multiplexing time slots of the analog subscriber type in a state where the time slot positions are exchanged except for the time slot in the empty state. It is achieved by

[0009]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described below with reference to FIG. Now, FIG. 1 shows a concrete accommodating method in an example according to the present invention when accommodating the A subscriber and the I subscriber respectively in an analog subscriber exchange and an ISDN subscriber exchange. In this case, A subscribers (analog terminals) 21 and I subscribers (ISDN terminals) 2 scattered in remote areas
2 are mixedly accommodated in the remote multiplex transmission apparatus 1, and are also respectively exchanged for analog subscribers 3 via time division multiplexed optical transmission lines (optical fibers) 19 and 20 and subscriber distribution apparatus 2,
It is distributed and accommodated in the exchange 4 for ISDN subscribers. By the way, the practical difference from that shown in FIG. 3 is that in the subscriber distribution apparatus 2 according to the present invention, the signal conversion capacities of the I subscriber signal conversion circuits 9 and 14 are actually accommodated. The number of I-subscribers 21 accommodated depends on the number of the I-subscribers 21 accommodated, and the line concentrator switches 8 and 15 as time switches are provided in the vicinity thereof. As described above, the subscriber distribution device 2 is directly related to the present invention, and the main components inside thereof will be described below including the meaning of confirmation.

That is, the subscriber distribution device 2 converts the optical interface with the remote multiplex transmission device 1 into an electrical interface, an optical-to-electrical interface section 5, a clock signal C in the system, and an A / I based on a reference frame signal F. T
By the A / I designating circuit 18 that creates the S position information, and the I designating information (a) from the A / I designating circuit 18, the A / I from the highway (HW) received by the optical → electrical interface unit 5
A that separates I data and supervisory signals into dedicated HWs
A / I separation unit 6, A / W HW for A separated by 16 MF format for 1 TS per TS (accommodating 16 subscribers) A subscriber supervisory signal for 1 TS per subscriber, 1 MF format A subscriber signal conversion circuit 7 for converting into a signal, a concentrator switch 8 as a time switch for accommodating the I-dedicated HW separated by the A / I separator 6 and connecting with an arbitrary TS, and I connected by the concentrator switch 8 6MF per TS of HW for use
Monitoring signals from I-subscriber signal conversion circuit 9 and A-subscriber signal conversion circuit 7 for converting the monitoring signal for I-subscribers of the type (accommodating two subscribers) into the monitoring signal of 1TS / 4MF format per subscriber And the supervisory signal from the I subscriber signal conversion circuit 9
A / I multiplexer 10 for multiplexing on HW, time switch 11 for connecting TS in HW from A / I multiplexer 10 to an arbitrary exchange, time switch 12 for connecting TS from an arbitrary exchange to arbitrary TS , H from the time switch 12 by the I designation information (b) from the A / I designation circuit 18
Recognizing the position of A subscriber in W, 1TS per subscriber, 2
MF type A subscriber control signal is transmitted by 32 MF (1
A subscriber signal conversion circuit 13 for converting into a control signal for 6 subscribers), A / H from the HW from the time switch 13
The I-subscriber position in the HW is recognized by the I-designation information (b) from the I-designation circuit 18, and 1 TS per subscriber and 4 MF format I-subscriber control signal is 6 MF per TS (accommodating 2 subscribers). I subscriber signal conversion circuit 1 for converting into control signals
4. I Concentration switch 1 as a time switch for connecting the TS in the HW from the subscriber signal conversion circuit 14 to an arbitrary TS
5. A / I multiplexer 16 that multiplexes the HW from the concentrator switch 15 and the HW from the A subscriber signal converter 13, and the remote multiplex transmission device 1 by optically converting the electrical signal from the A / I multiplexer 16. It is composed of an optical interface 17 to be connected.

On the time division multiplexed optical transmission lines 19 and 20 between the remote multiplex transmission device 1 and the subscriber distribution device 2, A
The subscriber TS area and the I subscriber TS area are secured. Specifically, on the upstream time division multiplexing optical transmission line 19, in a state where the B channel for accommodating the voice / data from each of the subscribers 21 and 22 and the supervisory signal for notifying the calling etc. are multiplexed. While being transmitted from the remote multiplex transmission device 1 to the subscriber distribution device 2, on the downlink time division multiplexing optical transmission line 20, ringing a B channel and a bell for accommodating voice / data from each of the other subscribers, etc. The control signal is transmitted from the subscriber distribution device 2 to the remote multiplex transmission device 1 in a multiplexed state. Among them, since the monitoring / control signal has a slow change rate, the monitoring / control signals for a plurality of subscribers are transmitted / received in the MF format in one TS, which allows the time division multiplexing optical transmission line. On the 19 and 20, many B channels can be secured accordingly. Further, the number of MFs at that time varies depending not only on the sending direction between the remote multiplex transmission apparatus 1 and the subscriber distribution apparatus 2 but also on the subscriber type. In the example shown in FIG. Has been adopted.

(1) Remote multiplex transmission device 1 → subscriber distribution device 2 direction A subscriber: 1 MF accommodates 16 subscriptions in 1 TS (1
6MF configuration) I subscriber: 3MF / subscription accommodates 2 subscriptions within 1TS (6M
(F configuration) (2) Subscriber distribution device 2 → remote multiplex transmission device 1 direction A subscriber: 1 MF accommodates 2 MF / subscription for 16 subscriptions (3
2MF configuration) I subscriber: 2 subscription of 3MF / subscription in 1TS (6M
F configuration) The operation of each of the above (1) and (2) will be described below.

That is, first, in the case of (1), each TS from the remote multiplex transmission device 1 is converted into an electric signal by the optical → electrical interface unit 5, and then an I designation signal ( According to a), the HW dedicated to the A subscriber and the HW dedicated to the I subscriber are separated and extracted. Of these, the A subscriber monitoring signal accommodating 16 subscriptions per 1 TS (16 MF configuration) is processed by the A subscriber signal conversion circuit 7 to 1 subscriber per 1 TS.
It is converted into a supervisory signal of (1MF configuration). At that time, the supervisory signal HW and the B channel HW are separated and the supervisory signal and voice / data per subscriber are converted to have the same TS number. It This allows the time switch 11 to control the supervisory signal and the B channel in pairs.

Hereinafter, regardless of the distinction between A / I and the directions of (1) and (2), it is assumed that the correspondence between the supervisory signal and the B channel is maintained. The number of I subscriber supervisory signals accommodated in the dedicated HW is 2 per TS
Although it is possible to accommodate a subscription (6MF configuration), the supervisory signal is not necessarily multiplexed in each of the plurality of TSs set for supervisory signal multiplexing.
When the number of I subscribers is small, there is a TS in which the supervisory signal for one subscriber is not multiplexed. In such a case, only a TS in which a supervisory signal for at least one subscriber is multiplexed by a concentration switch (concentration ratio (the number of incoming subscribers: the number of outgoing subscribers) in this example is 2: 1) 8. Is connected to the I subscriber signal conversion circuit 9. In other words, the TS in which the supervisory signals for at least one subscriber are multiplexed is passed through the concentrator switch 8,
A TS for which the supervisory signals for the subscribers are not multiplexed is not passed through the concentrator switch 8. Each TS from the concentrator switch 8 is normally set to 1 by the I subscriber signal conversion circuit 9.
It is converted into 1 subscription per TS (4 MF configuration: effectively 3 MF, 1 MF is empty). At this time, the MF phase of the 4 MF supervisory signal from the I subscriber signal conversion circuit 9 is I subscription. All subscribers input to the personal signal conversion circuit 9 have the same phase. After that, the A-subscriber dedicated HW from the A-subscriber signal conversion circuit 7 and the I-subscriber dedicated HW from the I-subscriber signal conversion circuit 9 are A / I in a predetermined A / I area according to the in-device reference phase. After being multiplexed by the multiplexing unit 10, it is connected to the analog subscriber exchange 3 or the ISDN subscriber exchange 4 via the time switch 11 by A / I subscription identification. By the way, the concentration switch 8
The time switch 11 is controlled by software having A / I management information.

In the case of (2), the control signal from each of the analog subscriber exchange 3 and the ISDN subscriber exchange 4 is a predetermined A according to the in-device reference phase.
The / I region is connected by the time switch 12. These control signals are multi-connected to the A subscriber signal conversion circuit 13 and the I subscriber signal conversion circuit 14, whereby A
In the subscriber signal conversion circuit 13, the A subscriber accommodating position is identified from the I designation information (b) from the A / I designation circuit 18, and the control signal of 1 subscription (2MF configuration) per 1TS is 1TS.
16 subscribers are multiplexed in the MF direction (32 MF configuration, all MF phases are the same as other TS), while I
In the subscriber signal conversion circuit 14, the I subscriber accommodating position is identified from the I designation information (b) from the A / I designation circuit 18, and one subscription per 1 TS (4MF configuration: effectively 3MF
The control signal of 1 MF is vacant) is multiplexed in one TS in the MF direction for two subscribers (6 MF configuration, all MF phases are the same as other TS), and then remote multiplexing is performed by the concentrator switch 15. The processed TS is connected to the TS corresponding to the accommodation position of the I subscriber accommodated in the transmission device 1. Therefore, the A-subscriber signal and the I-subscriber signal from the A-subscriber signal conversion circuit 13 and the concentrator switch 15 respectively are sent to the A / I multiplexer 1
5 is multiplexed in the A / I designated area in accordance with the A / I designation information (c) designated by the A / I designation circuit 18 and the optical ←
After being converted into an optical signal by the electrical interface unit 17, it is sent to the remote multiplex transmission apparatus 1 via the downlink time division multiplexing optical transmission line 19.

[0016]

As described above, according to the first aspect, the A-subscriber and the I-subscriber are mixedly accommodated in the remote multiplex transmission equipment, and the time division multiplex transmission line and the subscriber distribution equipment are provided. The I subscribers can be economically accommodated in the ISDN exchanges when distributed and accommodated in the analog exchanges and the ISDN subscriber exchanges, respectively.

[Brief description of the drawings]

FIG. 1 is a diagram showing a concrete accommodating method in an example according to the present invention when accommodating an analog subscriber and an ISDN subscriber respectively in an analog subscriber exchange and an ISDN subscriber exchange.

FIG. 2 is a diagram showing a general accommodation method when accommodating an analog subscriber and an ISDN subscriber in an analog subscriber exchange and an ISDN subscriber exchange, respectively.

FIG. 3 is a diagram showing a specific accommodating method in an example according to the prior art when accommodating an analog subscriber and an ISDN subscriber in an analog subscriber exchange and an ISDN subscriber exchange, respectively.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Remote multiplex transmission device, 2 ... Subscriber distribution device, 3 ... Analog subscriber exchange, 4 ... ISDN subscriber exchange,
5 ... Optical → electrical interface section, 6 ... A / I separation section, 7
... A subscriber signal conversion circuit, 8 ... concentration switch, 9 ... I subscriber signal conversion circuit, 10 ... A / I multiplexer, 11 ... time switch, 12 ... time switch, 13 ... A subscriber signal conversion circuit, 14 ... I subscriber signal conversion circuit, 15 ... Concentration switch, 16 ... A / I multiplexing section, 17 ... Optical ← electrical interface section, 18 ... A / I designating circuit, 19 ... Uplink time division multiplexing optical transmission line, 20 ... Downstream time division multiplexed optical transmission line, 21 ... A
Subscriber (analog terminal), 22 ... I subscriber (ISDN terminal)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Makoto Hashimoto, 216 Totsuka-cho, Totsuka-ku, Yokohama-shi, Kanagawa, Ltd. Information & Communication Division, Hitachi, Ltd. (72) Inventor Junji Takayama 1-6, Uchisaiwai-cho, Chiyoda-ku, Tokyo No. Japan Telegraph and Telephone Corporation (72) Inventor Hirofumi Horikoshi 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Japan Telegraph and Telephone Corporation (72) Inventor Yoshihiro Sato 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo No. Japan Telegraph and Telephone Corporation (72) Inventor Makoto Nakajima 5-7-1 Shiba, Minato-ku, Tokyo Inside NEC Corporation

Claims (1)

[Claims] 1. Analog subscribers scattered at remote locations,
The ISDN subscribers are accommodated in the remote multiplex transmission equipment in a mixed manner, and are also accommodated in a state where they are distributed to the analog subscriber exchange and the ISDN subscriber exchange via the time division multiplexing transmission line and the subscriber distribution equipment, respectively. A method of accommodating an analog / ISDN subscriber in an analog / ISDN switch as described above, wherein a supervisory signal from each analog subscriber is provided in a time slot on the upstream time division multiplexing transmission line,
A supervisory signal multiplexing time slot for multiplexing a plurality of subscribers with supervisory signals from each ISDN subscriber in the same time slot, and a time slot on the downlink time division multiplexing transmission line has analog subscribers respectively. Control signals for ISDN subscribers, and control signals for ISDN subscribers are set in advance so that the time slot positions are known in advance for control signal multiplexing time slots for multiplexing a plurality of subscribers in the same time slot. In the state, in the subscriber distribution device, each time slot for supervisory signal multiplexing from the upstream time division multiplexing transmission line is once separated and extracted for each subscriber type according to the time slot position,
After the signal is converted into the supervisory signal of one time slot per subscriber and then multiplexed again, the supervisory signal multiplexing time slot separated and extracted as the ISDN subscriber type is idle through the time switch. While preventing the signal conversion for the time slot in
For the time slots other than the empty time slots, the signal is converted into a supervisory signal of one time slot per subscriber with the time slot positions interchanged, and one time per subscriber per subscriber type. The supervisory signals converted into the slots are separated and input to the exchanges for analog subscribers and the exchanges for ISDN subscribers through the time switch in the multiplexed state, while the supervisory signals are input to the exchanges for analog subscribers and ISDN subscribers. The control signal of one time slot per subscriber from each exchange is for control signal multiplexing in which a plurality of control signals are multiplexed in the same time slot for each subscriber type according to the time slot position via the time switch. The signal is converted as a time slot and then sent out on the downlink time division multiplexing transmission line in a multiplexed state. At this time, the control signal multiplexing time slots of the ISDN subscriber type are multiplexed with the control signal multiplexing time slots of the analog subscriber type in a state where the time slot positions are replaced except for the idle time slot. Analog / ISD
How to accommodate N subscribers in analog / ISDN exchanges.