JP2986508B2 - Multi-connection method for time series signals - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Summary] Regarding a multi-connection system of a time series signal of a digital exchange, the distribution of a common resource signal used by a plurality of devices in a system can be performed without being affected by a phase difference between the devices and by a hardware amount. The purpose of the present invention is to provide a multi-connection method of time-series signals that can be realized without increasing the number of signals, and switch the signals of the time-division multiplex transmission lines on the input side and output the signals to the time-division multiplex transmission lines on the output side A plurality of switching devices having a reference phase, a plurality of phase adjusters for adjusting the phase by receiving time-division multiplexed signals including signals for common resources output from the plurality of switching devices, respectively; The output of the phase adjuster is sequentially shifted by a predetermined phase difference, and a time-series signal in which signals for common resources of each switch device are sequentially arranged is output. And a time-division switch for a common resource interface to which an output from the selector is input. The time-division switch accommodates common resources such as a common sound source and an additional service device, and receives a time series input from the selector. For switching between the signal and the common resource signal, outputting a time-series signal including the signal of the common resource to the transmission line on the output side, and adjusting the output time-series signal to the reference phase of a plurality of switch devices. Is input to each switch device via a phase adjuster provided in each switch device.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-connection system for a time series signal of a digital exchange.

In the technology of digital exchanges, sound sources such as various tones (busy tone, dial tone, ring back tone) and talkie, and devices for additional services (three-party communication, etc.) are provided as common resources in a communication path device. Channels of such resources are distributed to channels on a multiplex transmission line for communication (multiple connection of signals to multiple channels is called multi-connection). At this time, the reference phase of each time-division switch and the common resource It is necessary to match with the channel of this.

[Prior Art] In a digital exchange, common resources in a communication path device are usually arranged in a centralized manner, and as a conventional signal distribution method for distributing those signals to a plurality of necessary devices in the communication path device (double connection). There are the following methods.

The first conventional method is shown in FIG. 5 as an explanatory diagram of a conventional example.

In FIG. 5, reference numeral 50 denotes a forward time-division switch (LCSW).
F), 51 is a distribution switch (DSW), 52 is a time division switch (LCSWB) in the reverse direction, 53 is a common resource including various common sound sources and additional service devices for performing three-party calls, etc., 54, 56
Represents an inserter, and 55 and 57 represent droppers.

To the inserters 54 and 56 on the time division multiplex transmission line connected to the input side of the time division switches 50 and 52, the channel of the sound source data and the channel for the supplementary service are supplied from the common resource by the multiple connection (multiple connection). Distribution switch 51
Signals of necessary channels are extracted from droppers 55 and 57 provided on the time-division multiplex transmission path on the input side of the input and the output side of the time-division switch 52 and input to the common resource. Channel signals extracted from these droppers are used to perform supplementary services.

In such a configuration, the signal from the common resource is transmitted to the transmission path from the common resource without matching the reference phase in each of the time division switches 50 and 52 (for example, 531, FIG.
532). Second conventional method (not shown)
Is a method in which a time-division multiplex transmission line whose phase is adjusted for each device (time-division switch) is provided for each device and connected from a centrally arranged common resource.

[Problem to be Solved by the Invention] Among the conventional methods described above, the first method (FIG. 5) is as follows.
Time slot sequence integrity (abbreviated to TSSI) in communication using a plurality of time slots (for example, a three-party call service) is not guaranteed. That is, since the reference phase of the time switch and the phase of the common resource are not matched, there is a problem that the order of the time slots (the order of the time slots) is out of order and the original signal order cannot be maintained. In addition, when required signals are different among a plurality of devices, there is a case that a time slot position of a signal accommodated in a time division multiplex transmission path is restricted, and there is a disadvantage that accommodation of a time slot is insufficient.

Next, the second method has a disadvantage that the amount of hardware of the time division multiplex transmission line is enlarged.

The present invention provides a multi-connection of time-series signals that enables distribution of a common resource signal used by a plurality of devices in a system without being affected by a phase difference between the devices and without increasing the amount of hardware. The purpose is to do.

[Means for Solving the Problems] FIG. 1 is a basic configuration diagram of the present invention.

In FIG. 1, reference numeral 1 denotes a time-division switch for a common resource interface, 2 denotes a common resource in a system including an additional service device 21 and a common sound source 22, and 3 denotes a second phase adjuster (an elastic store: ES). Display, 8 is the first phase adjuster (displayed as elastic store: ES), 4 is the selector, 5 is the transmission line selection circuit, 6 is the multi-connection of the input side (input side of the switch for the common resource interface) Time-division multiplex transmission line, 7 is the output-side multi-connection time-division multiplex transmission line, 9
Denotes a plurality (n) of devices (# 1 to #n), and 10 denotes a time-division multiplex transmission line for collection of each device 9.

The present invention adjusts the phase of a time-series signal group from a plurality of devices by a phase adjuster using a well-known elastic store for phase adjustment, and then aggregates the same into one time-division multiplex transmission line. It is input to a time division switch for a common resource interface, distributes (or collects) a signal of a common resource required for each device, and supplies the signal to each device from a time division multiplex transmission line for multi-connection.

[Operation] Each of the plurality of (n) devices 9 has an input time division multiplex transmission line and an output time division multiplex transmission line, and a certain number of time slots among them are allocated to a common resource, and The time slots are accommodated with a certain phase difference between the devices. A signal including a time slot allocated for a common resource of each device 9 is output to a time-division multiplexing transmission line 10 for collection, and a phase difference between each device is determined in each phase adjuster (ES) 3 by a reference phase. The phase is adjusted so as to match. Next, the output of each phase adjuster (ES) 3 whose phase has been adjusted to have the same phase is input to the selector 4. The selector 4 sequentially selects a time-series signal including a time slot for a common resource accommodated with a predetermined phase difference shifted from each time division multiplex transmission line 10 by the transmission line selection circuit 5.

As a result, the time division multiplex transmission line 6
Contains time slots of time-series signals from respective devices and are input to the time-division switch 1 for the common resource interface.

The time-division switch 1 has a function of a time switch, and as shown by a dotted line, a supplementary service device 21 or a common sound source 22.
, And outputs the switched output to the time-division multiplex transmission path 7 on the output side.

In this way, a common resource signal for each of the devices 9 is set in the time-division multiplex transmission path 7 for multi-connection of the time-division switch 1 and supplied to each device 9 by multi-connection. At this time, the phase is adjusted by a phase adjuster (ES) 8 provided on the input side of each device 9. The transmission line connected to the supplementary service device 21 on the transmission line on the output side of the time division switch 1 is for extracting a time slot in which the supplementary service is executed from the time slot of the time division multiplex transmission line 7. is there.

Each device 9 extracts a time slot for a common resource assigned to each device from the time-division multiplexed signal output from the time-division switch 1 by switch control of each device, and extracts the time slot of the transmission line on the output side. Convert to slot and output.

Embodiment FIG. 2 is a diagram showing a timing relationship and a signal configuration of the embodiment.

FIG. 2 shows the number n of devices 9 in the basic configuration of FIG.
= 4, the number of time slots in the time division multiplex transmission line = 51
This is an example in which 2 (0 to 511) is set.

FIG. 3 (a) shows the accommodation of the time division multiplex transmission line (6 in FIG. 1) on the input side of the multi-connection, and FIG. 3 (b) shows the time division multiplex transmission line (6) on the output side of the multi connection. Fig. 7 shows the accommodation of 7) in Fig. 1.

Each of the four devices (9 in FIG. 1) is hereinafter referred to as a device #
The operation of FIG. 2 will be described as 1 to apparatus # 4. The reference numerals of the respective parts referred to in the description are the same as those shown in FIG.

The time-division multiplexing transmission line 10 for collection provided on the output side of each of these devices # 1 to # 4 has 512 time slots 0 having different phases as shown in FIG.
Signals from (TS0) to time slot 511 (TS511) are output.

FIG. 3 (a) shows how these devices are accommodated on the time division multiplex transmission line 10. That is, in the case of the device # 1, the time slots 0 to 7 and the time slots 18 to 31 are communication time slots of the supplementary service device, and the time slots 8 to 17 and 48 contain a sound source such as a tone talker. In addition, the time division multiplex transmission line 10
In the case of, a sound source such as a communication time slot or a tone talker of a similar additional service device is accommodated at a position shifted by 128 time slots from the time slot of the device # 1. Further, each of the time division multiplex transmission lines 10 of the devices # 3 and # 4 similarly contains similar signals in time slots shifted by 128 time slots.

The time division multiplex transmission line 10 of these devices # 1 to # 4
Are input to a phase adjuster (ES) 3 and the respective phases are adjusted, so that the state matches the reference phase as shown in FIG. 2B, and the phase difference between the devices is eliminated.

The output of the phase adjuster (ES) 3 is input to the selector 4,
The selector 4 is controlled by an output from the transmission line selection circuit 5 to select one of the four inputs in order (every 128 time slots) and output it to the time division multiplex transmission line 6 on the input side.

The transmission path selection circuit 5 generates a 2-bit output signal having a waveform as shown in FIG. 2C. That is, two bits “0” and “0” are generated during the time slots 0 to 127 in synchronization with the reference phase of FIG. 2B. Then, the selector selects and outputs the time slot output from the device # 1 (passing through the phase adjuster (ES) 3) as shown in FIG. 2D. This period includes the service and sound source time slots allocated to the device # 1 as described above.

During the next time slots 128 to 255, the transmission line selection circuit 5 generates "1" and "0", and the selector selects and outputs the output of the device # 2. In this time slot,
Similarly, service and sound source time slots included in the device # 2 are included. Other time slots 256-383
In each of the time slots 384 to 511, the output of the devices # 3 and # 4 is selected, and as shown in FIG. Are serially output to the time-division multiplex transmission line 6 on the input side.

The time division switch 1 for the common resource interface is a common resource (additional service device 21 or common sound source 22)
The output from each is switched by the control of a control device (by a program) using a known time switch.
An operation of supplying a sound source and a time-series signal of an additional service device required for the service and sound source slots for each of the devices # 1 to # 4 is performed.

FIG. 3B shows the accommodation state of the time-division multiplex transmission path 7 for multi-connection on the output side from the time-division switch 1. Each arrangement in this is the same as FIG. 3 (a) except for a part.

 FIG. 4 shows an application example in a switching system.

In FIG. 4, 31 is a common resource interface switch, 32 is a common tone generator, additional service device, and 33 is provided corresponding to the output of the time division multiplex transmission line branched from each switch, and is used for adjusting the phase to the reference phase. Elastic store, 34 is a selector, 35 is a transmission line selection circuit (SEL), 36 is an input side time division multiplex transmission line, 37 is a multi connection time division multiplex transmission line, 38 is a phase adjustment with each time division switch Elastic store, 39 indicates a forward (forward) time division switch (LCSWF), 40 indicates a distribution switch (DSW), and 41 indicates a reverse (backward) time division switch (LCSWB).

The configuration shown in FIG. 4 also operates according to the same principle as described in the above embodiment. In brief, the signals from the time division multiplex transmission lines input from the switches 39 to 41 are adjusted to the same phase by the elastic store 33, and then sequentially selected by the selector 34 under the control of the transmission line selection circuit 35. Are combined into one time-division multiplex transmission path, and the common resource interface switch 31
The connection (switch) with the supplementary service device 32 is made, and the time division multiplex transmission line 37 for multi-connection connects to each time division switch 39.
To 41 through the elastic store 38.

[Effects of the Invention] According to the present invention, it is possible to unify a distribution interface to each device of a common resource in the system such as a tone source and a talker used in a plurality of devices in the system and a supplementary service in the system.

Addition and modification of resource types and accommodation locations by performing multi-connection using a time-division multiplex transmission line using a large-capacity elastic store that uses memory technology that is realizing large capacity and low cost. It is possible to respond flexibly to software, and at the same time, it is possible to effectively use the capacity of the time division multiplex transmission line while guaranteeing TSSI.

Further, the multiple connection of the time division multiplex transmission line can reduce the hardware amount of the device interface required in the conventional method.

[Brief description of the drawings]

1 is a diagram showing a basic configuration of the present invention, FIG. 2 is a diagram showing a timing relationship and a signal configuration of the embodiment, and FIG. 3 (a) is a diagram showing accommodation of a time-division multiplex transmission line on an input side of a multi-connection. 3 (b) is a diagram showing the accommodation of a time division multiplex transmission line on the output side of the multi-connection, FIG. 4 is a diagram showing an application example in an exchange system, and FIG. 5 is an explanatory diagram of a conventional example. In FIG. 1, 1: time division switch for common resource interface 2: common resource 21: supplementary service device 22: common sound source 3, 8: second and first phase adjusters (elastic store: E
S) 4: Selector 5: Transmission line selection circuit 6: Input-side multi-connection time division multiplex transmission line 7: Output-side multi connection time division multiplex transmission line 9: Device 10: Collection time division multiplex transmission line

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kiyohiko Kuroda 1015 Uedanaka, Nakahara-ku, Kawasaki-shi, Kanagawa Prefecture Inside Fujitsu Limited (72) Inventor Tomikan 1-6-1 Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone (72) Inventor Harutoshi Kameda 1-7-12 Toranomon, Minato-ku, Tokyo Oki Electric Industry Co., Ltd. (72) Inventor Hiroshi Takagi 216 Totsukacho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Totsuka Hitachi, Ltd. In-plant (58) Field surveyed (Int. Cl. ⁶ , DB name) H04Q 11/00-11/08 H04M 3/42

Claims (1)

(57) [Claims] In a multi-connection method of a time series signal of a digital exchange, a plurality of signals having different reference phases, each of which switches a signal of a time division multiplex transmission line on an input side and outputs the signal to a time division multiplex transmission line on an output side. A plurality of phase adjusters, each of which receives a time-division multiplexed signal including a signal for a common resource output from each of the plurality of switch devices and adjusts a phase, and the plurality of phase adjusters And a selector for outputting a time-series signal in which signals for common resources of the respective switch devices are sequentially arranged by shifting the outputs of the switch devices by a predetermined phase difference, and a common resource interface for receiving an output from the selector. A time-division switch, wherein the time-division switch accommodates common resources such as a common sound source and an additional service device, and Switching between the input time-series signal and the common resource signal to output a time-series signal including a signal of the common resource to an output-side transmission path, and transmitting the output time-series signal to the plurality of switches. A multi-connection method of a time-series signal, which is input to each switch device via a phase adjuster provided in each switch device for adjusting to a reference phase of the device.