JPH09284277A - Data multiple address system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the transmission efficiency by relieving the load of a multiple address transmission station. SOLUTION: The system is provided with a multiple address transmission station 11 sending prescribed data, and plural reception stations 12, 13, 14 receiving data sent from the multiple address transmission station 11. The multiple address transmission-station 11 is provided with a transmission function that sends a data frame obtained by adding an address of the plural reception stations 12, 13, 14 to received the prescribed data to the data to an optional single reception station 2 among the plural reception stations 12, 13, 14. On the other hand, each of the plural reception stations 12, 13, 14 is provided with a relay transmission function that copies data from the received data frame, retrieves an address of a reception station of a succeeding stage from the address of the plural reception stations added to the data frame and sends the data frame to the retrieved address.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data broadcasting system, and more particularly to a data broadcasting system for transmitting the same data from a broadcasting transmitting station to a plurality of receiving stations.

[0002]

2. Description of the Related Art FIG. 5 shows a conventional example. As shown in FIG. 5A or FIG. 5B, the broadcast transmitting stations 51 and 61 are
Forward line 53 for transmitting data for broadcasting,
, 63 _A , ... Are connected to a plurality of receiving stations 52 _A , ..., 62 _A ,. Further, the broadcast transmitting stations 51 and 61 and the plurality of receiving stations 52 _A , ...
, 62 _A , ... Are connected via backward lines 54, 64 (dedicated lines or public lines) to return a data reception confirmation signal from the receiving station.

In a data broadcasting system in which a broadcasting transmitter station and each receiving station are connected using a public line, the same data is received by one-to-one communication between the broadcasting transmitter station and each receiving station. It was supposed to be transmitted repeatedly for the number of stations.

[0004]

However, the above-mentioned prior art has the following disadvantages.

The first disadvantage is that all backward lines connected to a plurality of receiving stations are controlled by a single broadcast transmitting station, and the same data must be repeatedly transmitted. Therefore, the processing load on the broadcast transmitting station becomes large.

The second disadvantage is that the equipment for using the branch dedicated line and the satellite line must be large in scale.
The equipment of the whole system becomes large-scale. Especially,
There is the inconvenience that the initial capital investment will also increase.

A third disadvantage is that since a branch dedicated line or a satellite line is used as the forward line, even if the receiving station that needs data broadcasting is a part of all the receiving stations, the forward line is exclusively occupied. However, because the broadcast destination is fixed,
It is inevitable that the line operation will be inefficient.

[0008]

It is an object of the present invention to improve the inconveniences of the conventional example, in particular, to simplify the construction of the equipment and equipment, to reduce the load of the broadcast transmitting station, to improve the transmission efficiency, and to further improve the dynamic performance. It is an object of the present invention to provide a data broadcasting system capable of changing a broadcasting destination and a broadcasting route.

[0009]

In order to achieve the above object, in the invention according to claim 1, a broadcast transmitting station transmitting predetermined data and a plurality of receiving the data transmitted from this broadcast transmitting station. And a receiving station. Among these, the broadcast transmitting station is a transmission function that transmits a data frame in which the addresses of a plurality of receiving stations to which the data should be transmitted are added to predetermined data to any single receiving station of the plurality of receiving stations. Is equipped with. On the other hand, each receiving station copies the data from the received data frame and retrieves the address of the receiving station of the next stage from the addresses of the plurality of receiving stations added to the data frame and sends the data to the retrieved address. It is configured to have a relay transmission function for transmitting frames.

According to the present invention, when a data frame is transmitted from a broadcast transmitting station to a single receiving station, the first receiving station that receives this data frame acquires the data, and then the data frame is transmitted to the first receiving station. It is transmitted by the receiving station of the first stage to the receiving station of the next stage. After that, each receiving station having a preset address sequentially serves as a relay point, and the data frame is transmitted in a relay manner.

According to the second aspect of the invention, a public line is used as the data frame communication means. In the present invention, the broadcast transmitting station and each receiving station perform relay transmission of the data frame while connecting the call to the receiving station of the next stage according to the address added to the data frame.

In the invention of claim 3, the broadcast transmitting station is
The configuration is such that it is provided with an input means capable of freely setting addresses of a plurality of receiving stations to which predetermined data should be transmitted. In the present invention, the broadcast route of a data frame is arbitrarily determined by arbitrarily setting the addresses of a plurality of receiving stations to which the broadcast transmitting station should transmit data.

The above aims to achieve the above-mentioned object.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIG.
It will be described with reference to FIG.

In the data broadcasting system shown in FIG. 1, a broadcasting transmission station 11 for transmitting data for broadcasting and a plurality of receiving stations 12, 13, 14 for receiving the broadcasting data are connected to a public line 15. Are connected to each other via. Broadcasting station 1
Reference numeral 1 denotes a terminal adapter 112 for controlling data transmission / reception by the public line 15, and a broadcast transmission control unit 111 for generating data for broadcast and controlling the terminal adapter 112 to control transmission of the broadcast data. It has and.

On the other hand, the receiving stations 12 and 13 have terminal adapters 123 and 133 for communication with the preceding station, respectively.
And a terminal adapter 12 for communication with the latter station
4, 134 and a broadcast communication line control unit 122, 1 for controlling the terminal adapter and receiving broadcast data from the preceding station.
32, and data reception control units 121 and 131 for logically interpreting the broadcast data transferred from the broadcast communication line control units 122 and 132. In addition, the receiving station 14
Indicates a bundle of all the receiving stations connected after the receiving station 13, which is also configured similarly to the receiving stations 12 and 13.

Here, each receiving station 12, 13, 14 is not a specific receiving station which is always fixed to the broadcast transmitting station 11, but an arbitrary receiving station to which a "call" is connected through the public line 15. Becomes the receiving station 12, and the receiving stations in the subsequent stages are not the specified receiving stations.

Next, the operation of this embodiment will be described with reference to FIGS.

First, the broadcast transmission control unit 1 of the broadcast transmission station 11
The terminal 11 controls the terminal adapter 112 to make a call to an arbitrary single receiving station in a group of a plurality of receiving stations that broadcasts data, and connects the call. As a result, the connected receiving station becomes the receiving station 12 in FIG.

Upon completion of the call connection, the broadcast transmitting station 11 sends to the receiving station 12 a data frame (1) in which broadcast destination identification information is added to data obtained by dividing the broadcast data into appropriate sizes. FIG. 2B shows the format of the data frame. Broadcast destination identification information S includes broadcast source identification information, first broadcast destination identification information, second broadcast destination identification information, ..., Nth broadcast destination identification information, respectively. It is included as address information (telephone number).

Terminal adapter 123 of receiving station 12
When receiving an incoming call from the broadcast transmitting station 11, after connecting the call, the data frame (1) is received and a reception notification is output to the broadcast communication line control unit 122.

Upon receiving the reception notification, the broadcast communication line control unit 122 transfers the data contained in the data frame (1) to the data reception control unit 121.

Thereafter, the broadcast communication line controller 122 completes the delivery of data to the data reception controller 121,
Upon receiving the confirmation response from the data reception control unit 121, the confirmation frame (1, 0) is transmitted to the broadcast transmitting station 11 via the terminal adapter 123.

Further, the broadcast communication line control unit 122 searches for the address of the receiving station at the next stage from the broadcast destination identification information S added to the data frame (1) in parallel with the above processing. Then, the terminal adapter 124 is controlled according to the retrieved address to make a call to the receiving station and connect the call. As a result, the connected receiving station becomes the receiving station 13 in FIG. After that, the broadcast communication line control unit 122
When the terminal adapter 124 is notified that the call connection is completed, sends the data frame (1) to the receiving station 13.

The broadcast communication line control unit 122 controls the receiving station 12
When the confirmation frame (1) from the receiving station 13 that operates in the same manner as the above is received through the terminal adapter 124, the confirmation frame obtained by combining the confirmation response received from the data reception control unit 121 and the content of the confirmation frame (1). (3,
1) is generated and sent to the broadcast transmitting station 11 via the terminal adapter 123.

Here, the receiving station designated as the last stage receiving station by the broadcast destination identification information S only controls the reception of the data frame. That is, receiving a data frame from the preceding station,
Also, only the confirmation frame is sent to the preceding station, and the data frame is not sent to the succeeding station.

The broadcast transmission control unit 111 receives the confirmation frame from the receiving station 12 via the terminal adapter 112, knows the data reception status at all the receiving stations, and controls the broadcast transmission.

[0028]

EXAMPLES Next, examples based on the above embodiment will be described in detail with reference to FIGS.

First, in FIG. 3, the transmitting station 31, the receiving station 32, and the receiving station 33 are connected to each other via an INS net 34.

The transmitting station 31 is input from the image editing device 311 which edits and generates an image for the purpose of broadcast distribution, the destination input device 312 for the operator to specify the broadcast destination, and the image editing device 311. Destination image input device 312
A broadcast transmission control device 313 that performs communication control for broadcast transmission to a destination instructed more, and the I
A terminal adapter (hereinafter abbreviated as TA) 314 for controlling data transmission / reception by the NS net 34 is provided.

On the other hand, the receiving station 32 performs TA325 for data communication with the transmitting station 31 via the INS net 34.
And TA3 for performing data communication with the receiving station 33 in the subsequent stage.
26 and a TA 325, 326 respectively to control communication for receiving broadcast image data, a broadcast reception control device 324, and image data passed from the broadcast reception control device 324 to receive a CRT 321 or a printer. A computer 323 for outputting to 322, a CRT 321 for reproducing image data, and a printer 322 are provided.

The receiving station 33 has the same structure as the receiving station 32, and is a receiving station positioned as a subsequent stage of the receiving station 32. Reference numeral 34 indicates an INS net.

Next, FIG. 4 shows the broadcast reception control device 32 of FIG.
4 is a diagram showing an internal configuration of FIG. The broadcast reception control device 324 shown in FIG. 4 controls the interface with the computer 323, and at the same time, the broadcast reception control device 324.
Main control unit 41 for controlling the overall operation of
1, a forward control unit 42 that controls the transfer of the image data according to the instruction from 1, and a backward control unit 43 that controls the transfer of the image data reception confirmation signal according to the instruction from the main control unit 41. TA325 in accordance with instructions from both of the word control units 43
And a TA control unit 44 for controlling the TA 326.

Next, the operation of this embodiment will be described in detail with reference to FIGS. 3 and 4.

First, in the transmission station 31, the broadcast transmission control device 313 receives input of image data from the image editing device 311 and stores it in the internal image storage memory. Also,
When the broadcast transmission control device 313 completes the reception of the destination information from the destination input device 312, the destination input device 3
The destination information received from 12 is analyzed, the receiving station 32 is selected as the receiving station of the first stage, the telephone number is instructed to the TA 314, and then a call is requested.

The TA 314 makes a call to the receiving station 32 via the INS net 34 in accordance with the instructed telephone number.

Next, at the receiving station 32, the TA 325
When an incoming call from the TA 314 is detected, an incoming call instruction is sent to the broadcast reception control device 324.

TA control unit 4 in the broadcast reception control device 324
4 (FIG. 4) receives the incoming call instruction from the TA 325, and when confirming that it is in a receivable state, returns an incoming call confirmation to the TA 325. In FIG. 4, a thick solid line indicates the flow of data frames, a thin solid line indicates the flow of control signals, and a dotted line indicates the flow of acknowledgment frames.

When the TA 325 receives this incoming call confirmation, it
An incoming call from 314 is accepted. As a result, TA31
A call is connected between the 4 and the TA 325.

Next, in the transmitting station 31, when the broadcast transmission control device 313 is notified of the call connection from the TA 314,
Of the image data already acquired from the image editing device 311, the image data within the specified amount range is read from the image storage memory from the beginning, and this is read out from the image storage memory, and the communication buffer memory (not shown)
Transfer to Then, the destination information received from the destination input device 312 is added as the broadcast destination identification information S to the image data on the communication buffer memory to generate a data frame. The broadcast transmission control device 313 transmits this data frame to the receiving station 32 via the TA 314.

Next, in the receiving station 32, the TA control unit 44 of FIG. 4 receives the data frame from the transmitting station 31 from the TA 32.
When received via 5, the data frame is transferred to the forward control unit 42. The forward control unit 42 copies the image data portion in the data frame to an internal image receiving memory (not shown) and outputs an image input notification to the main control unit 41. Further, the forward control unit 42 analyzes the broadcast destination identification information in the data frame and selects the receiving station 33 as the receiving station of the second stage. Then, the telephone number is instructed to the TA control unit 44 to request the connection to the next stage receiving station.

When the TA control unit 44 is requested to connect to the next-stage receiving station, the TA controlling unit 44 instructs the telephone number to the TA 326, and the receiving station 3
Make a call to 3. Then, the call is connected to the receiving station 33 and the forward control unit 42 is notified of the call connection.
The forward control unit 42, which has been notified of the call connection, instructs the TA control unit 44 to transmit the data frame. Upon receiving this instruction, the TA control unit 44 transmits the data frame to the receiving station 33 via the TA 326.

On the other hand, when the main control unit 41 receives the image input notification, it transfers the image data in the image receiving memory to the computer 323. When the transfer to the computer 323 is completed and the confirmation response from the computer 323 is received,
The main control unit 41 sends a confirmation response output request to the backward control unit 43. When receiving the confirmation response output request, the backward control unit 43 edits the confirmation frame and requests the TA control unit 44 to transmit the confirmation frame.

At this time, if the confirmation frame from the receiving station 33 has already been received, the backward control unit 43 edits the confirmation frame in which the contents of the confirmation frame from the receiving station 33 are combined, and the TA control unit 44 receives the confirmation frame. Request the transmission of a confirmation frame. After that, the communication operation is performed according to the procedure described in the embodiment of the invention, and the broadcast transmission of the image data is completed.

When the computer 323 completes the reception of the image data from the broadcast reception control device 324, the CR
The image data is reproduced by outputting the image data to T321 or the printer 322.

As described above, according to the present embodiment and the example, the data transmitted by the broadcast transmitting station is transmitted to the data frame to which the address of the receiving station to which the data should be transmitted is added, and the data received by each receiving station. Since the frame is transferred in a relay manner according to the specified address, the same data can be transmitted by the broadcasting station only once.
Since the line control with the receiving station at the next stage can be distributed to each receiving station, the processing load on the broadcast transmitting station can be reduced. Further, since the public line is used as the communication means, a general-purpose device can be used as the line facility, and the scale of facility and investment can be reduced as compared with the conventional example using the satellite line or the branch dedicated line.

Furthermore, since the address input device of the transmitting station can arbitrarily set the address of the receiving station for data transmission, the characteristics of the general public line can be utilized to dynamically change the broadcast destination and the broadcast route. It is also possible to add a new receiving station easily. Therefore, it is possible to improve flexibility regarding the operability of the system.

Here, in the case where a call is not connected to each receiving station due to a call made to a preset receiving station at the next stage,
The connection destination of the call is changed to another unconnected receiving station, the fact that the connection destination is changed is described in the data frame, and the data frame is sent to the connectable receiving station, and the data frame is received. It may be configured that the receiving station refers to the change of connection destination and tries to transmit the data frame again to the receiving station to which the call is not connected. According to this, the broadcast route is flexibly changed in the process of transmitting the data frame, and the data can be transmitted quickly.

[0049]

Since the present invention is constructed and functions as described above, according to this, the broadcast transmitting station transmits the data frame to which the address of the receiving station to which the data should be transmitted is added, and each receiving station Since the data frame received by the relay is transferred in a relay manner according to the specified address, it is possible to transmit the same data by the broadcast transmitting station only once and control the line between the receiving station at the next stage. Since it can be distributed to each receiving station, the processing load on the broadcast transmitting station can be reduced.

According to the second aspect of the present invention, since the public line is used as the communication means, a general-purpose device can be used as the line facility, and the facility and investment can be reduced as compared with the conventional example using the satellite line or the branch dedicated line. The scale can be reduced.

According to the third aspect of the invention, since the address of the receiving station to which data transmission is to be performed can be arbitrarily set by the destination input device of the transmitting station, the characteristics of the general public line can be utilized
The broadcast destination and the broadcast route can be dynamically changed, and a new receiving station can be easily added. For this reason, it is possible to provide an unprecedented excellent data broadcasting system in which the flexibility regarding the operability of the system can be improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

2A and 2B are explanatory diagrams showing a data communication method in the embodiment of FIG. 1, FIG. 2A shows a data communication procedure, and FIG. 2B shows a structure of a data frame.

FIG. 3 is a block diagram illustrating an example based on the embodiment of FIG.

4 is a block diagram showing an internal configuration of a broadcast reception control device in FIG.

5 is a block diagram showing a conventional example, FIG. 5 (a) shows an example using a branch dedicated line, and FIG. 5 (b) shows an example using a sanitary line.

[Explanation of symbols]

11 broadcast transmission station 12, 13, 14 reception station 15 public line 31 transmission station 32, 33 reception station 34 INS net 121, 131 data reception control unit 122, 132 broadcast communication line control unit 111 broadcast transmission control unit 112, 123, 124, 133, 134 Terminal adapter 311 Image editing device 312 Destination input device (address input means) 313 Broadcast transmission control device 314, 325, 326 Terminal adapter (TA) 321 CRT 322 Printer 323 Computer 324 Broadcast reception control apparatus

Claims (3)

[Claims] 1. A broadcast transmitting station for transmitting predetermined data,
In a data broadcasting system comprising a plurality of receiving stations for receiving the data transmitted from the broadcast transmitting station, the broadcast transmitting station is a plurality of receiving stations to which the predetermined data is to be transmitted. A transmitting function is provided for transmitting a data frame to which an address is added to any single receiving station among the plurality of receiving stations, wherein each receiving station copies the data from the received data frame and Data broadcasting characterized by having a relay transmission function of searching the address of the receiving station of the next stage from the addresses of the plurality of receiving stations added to and sending the data frame to the searched address. system. 2. The data broadcasting system according to claim 1, wherein a public line is used as a communication means for the data frame. 3. The broadcast transmitting station comprises an input means capable of freely setting addresses of a plurality of receiving stations to which the predetermined data should be transmitted.
Described data broadcasting system.