JPS6236997A - Two-way catv system - Google Patents

Abstract

PURPOSE:To improve the processing speed of a system even when many subscriber terminal equipment are employed by providing a sub-center and allowing a main center to apply collection processing of data of the subscriber terminal equipments through the said sub-center. CONSTITUTION:When the sub-center 2 polls a relevant subscriber terminal equipment 3 via a polling device 23 at first, the equipment 3 sends a subscriber identification number 35 and subscriber data 36 obtained from a meter while using a data sender 31. The center 2 uses a processor 21 to process the data obtained by polling and stores the required data in a data bank 24. When the main center 1 applies polling to the center 2, the center 2 sends a sub-center identification number 25 and sub-center data 26 to the center 1. The center 1 uses a CPU 13 to process the data obtained by the polling, sends the required data to a security center and stores it in a data bank 15.

Description

DETAILED DESCRIPTION OF THE INVENTION [Summary] In a two-way CATV system having a large number of subscriber terminals.

By providing a sub-center that can collect and process data by directly polling a plurality of subscriber terminal devices, the main center can quickly process subscriber data in a short time.

[Industrial application field]

The present invention relates to a two-way CATV system that can quickly provide subscriber services such as security services and automatic meter reading services in a short period of time.

The two-way CATV system not only provides information services from the center to the subscribers, but also allows the center to receive information or data from the subscribers, making it extremely useful as a means of exchanging regional information and providing various services. used for.

At this time, regardless of the size of the number of subscriber terminal devices.

It is desirable that subscriber information and data can be collected quickly and reliably at the center.

[Conventional technology]

In conventional two-way CATV systems, when performing automatic meter reading services, the center collects subscriber information by directly polling subscriber terminal devices.

That is, a data terminal device and various sensor devices with meters are installed on the subscriber terminal side, and when a polling signal arrives from the center, each subscriber terminal device responds to the call by sequentially collecting the accumulated data shown on the meter. is sent to the center.

The same applies to security services, where the center directly polls each subscriber terminal device.

[Problem that the invention seeks to solve]

In the conventional two-way CATV system mentioned above, as the number of subscriber terminals increases, it takes a long time to finish polling all the subscriber terminals from the center, especially for emergency services such as the latter security service. When something is needed, it becomes a serious problem if subscriber information cannot be collected quickly and in a short time.

[Means for solving problems]

What are the problems with the above conventional methods?

Boring device (23) for subscriber terminal device (3)
and a sub-center (2) having a processing device (21) capable of processing collected data from subscriber terminals.

This can be solved by the two-way CATV system of the present invention, which is provided with a main center (1) equipped with a boring device (11) for a sub-center and a central processing unit (13) for collecting and processing processing data at the sub-center. I can do it.

(Operation) According to the present invention, the subcenter has a data processing device,
Since the data of subscriber terminal devices collected through polling can be processed in advance, the main center can collect only the required data that has already been processed during subcenter polling, so the number of subscriber terminal devices is extremely large. This provides an effective system that can perform data processing in a short period of time even in cases where

〔Example〕

The present invention will be explained below with reference to the drawings.

Fig. 1 is a block diagram of one embodiment of the configuration of the bidirectional CATV system of the present invention, Fig. 2 is a block diagram of the equipment in each block of Fig. 1, and Fig. 3 is a block diagram of an embodiment of the configuration of the bidirectional CATV system of the present invention. FIG. 4, which shows an example of the data format used, is a time chart of signal transmission and reception for explaining the present invention.

In Figure 1, l is the main center, 2-1 to 2-m
is a sub-center provided according to the present invention.

3-1 to 3-n indicate subscriber terminals, and the main center is connected to a plurality of subcenters, and each subcenter is connected to a plurality of subscriber terminals by cables. Signals can be directed from the main center to the subscriber terminal as well as from the subscriber terminal to the main center, ie in both directions.

In FIG. 2, the main center 1 includes a head end and a polling device 11. Central processing unit (host computer) 13.11 Interface device between 13 and 12. Data sending device to security center 14. It has 15 data banks.

The subcenter 2 has a data processing device 21. Data sending device to the main center 22. Polling device 23 for subscriber terminal equipment. It is equipped with 24 data banks.

Further, the subscriber terminal device 3 is a home terminal data transmitting device 31. Various sensors 33. Various meters 34 degrees have an ink face device 32 placed between the data sending device 31 and the sensors and meters.

FIG. 3 (+) shows the data format sent from the subscriber terminal device 3 to the subcenter.

When the subcenter polls the subscriber terminal device 3 to which it belongs via the boring device 23, the terminal device 3 sends out the data shown in FIG. 3(1) from the data sending device 31. This data consists of a subscriber identification number 35 and subscriber data 36 obtained from a sensor or meter.The equipment subcenter processes the data obtained through polling in a data processing device 21 and stores the necessary data. FIG. 3 (i+) shows the format of data sent from the sub-center to the main center.

When the main center 1 polls the subcenter 2, the subcenter sends a signal in a data format consisting of a subcenter identification number 25 and subcenter data 26 to the main center 1.

The main center processes the data obtained through polling in the central processing unit 13, and sends the required data to the data sending device 1.
4 to the security center.

Moreover, it can be stored in the data bank 15 of the storage device.

Figure 4 is a time chart showing the flow of signals between the main center, sub-center, and subscriber terminal equipment. Shows only relationships.

First, each subcenter polls its affiliated subscriber terminals.

The subscriber terminal devices transmit data in numerical order, which is collected and processed at each subcenter to prepare for data transmission from the subcenter, and a response signal is issued when the preparation is complete.

The main center polls the sub-center (2), and the sub-center that has completed the process polls the subscriber terminal again.

The main center processes the collected data.

〔Effect of the invention〕

According to the present invention, even when there are many subscriber terminal devices, center-to-end polling time can be shortened and system processing speed can be increased.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the bidirectional CATV system of the present invention. FIG. 2 is a configuration diagram of devices in each block of FIG. 1. FIG. 3 shows an embodiment of the data format used in the bidirectional CATV system of the present invention. FIG. 4 is a time chart of signal transmission and reception for explaining the present invention. In fig. 1 is the main center. 2, 2-1 to 2-m are subcenters. 3, 3-1 to 3-n are subscriber terminal devices. 11.23 is a polling device. 12.32 is an interface device. 13 is a central processing unit (host computer). 14.22.31 is a data sending device. 15.24 is a data bank. 21 is a data processing device. 33 is a sensor. 34 is a meter.

Claims (1)

[Claims] Polling device (23) for subscriber terminal device (3)
and a sub-center (2) having a processing device (21) for processing data collected from subscriber terminal devices, a polling device (11) for the sub-center, and a central processing unit (2) for collecting and processing data processed at the sub-center. 13) A two-way CATV system comprising: a main center (1) provided with a main center (1);