JP2001069193A - Data transmission / reception system via communication satellite - Google Patents

Abstract

(57) [Summary] PROBLEM TO BE SOLVED: To quickly and accurately transmit / receive information on a result of data transmission / reception via a communication satellite using another communication means between a receiving station side and a transmitting station side. SOLUTION: A transmitting station side (10, 20) transmits data (D).
The header-attached data to which a different serial number (N) is added every time is formed so that it can be transmitted to each receiving station side (30) via the communication satellite 50, and each receiving station side (30) has a serial number code (N). N3)
Is received, the serial number code (N) stored in the code memory 33FM before receiving the data with the header.
1, N3), it is possible to determine whether or not there is a missing serial number code (N2) older than that received this time. If it is determined that there is a missing serial number code (N2), the missing serial number code is used. The undelivered information to which (N2) is added can be transmitted to the transmitting station side (10) by using another communication means (39).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for receiving data transmitted from a transmitting station and passing through a communication satellite at each receiving station, and between each receiving station and the transmitting station and the communication satellite. The present invention relates to a data transmission / reception system via a communication satellite formed so as to be able to transmit / receive information on data transmission / reception results using another communication means that does not pass through.

[0002]

2. Description of the Related Art In FIG. 27, a merchandise sales data system, which is an example of a data transmission / reception system having a data transmission / reception function via a communication satellite, performs a merchandise sales operation from a headquarters side, that is, a transmitting station side (transmitting station 20P). The data (D) necessary for performing and the like is transmitted to a communication satellite (for example, a geostationary satellite)
The data is transmitted to the store side, that is, the receiving station side (the receiving stations 30PA, 30PB), and is received from the receiving station side (30PA, 30PB) that receives the data. It is possible to transmit the received information (delivery acknowledgment information) to the transmitting station side (20P) using a communication means (for example, a wired ground line 39) and to transmit to the transmitting station side (2P).
0P) is configured to be able to confirm the end of delivery using the received information received.

More specifically, for example, various headquarters (host computer) (not shown) provided in the headquarters on the transmitting station side connect to the transmitting station 20P on the same transmitting station side via a wired line (such as a telephone line). Send master data. Upon receiving the data, the transmitting station (transmitting station 20P) distributes (transmits) the data to the receiving stations (receiving stations 30PA, 30PB) in each store when there is a transmission request (S in FIG. 28).
YES in T150, ST151).

Each of the receiving stations 30PA, 30PB has a plurality of terminals (not shown) (electronic cash register,
Credit processing machine).

[0005] Each store (the receiving station side) as each chain store concerned
Of the receiving stations (for example, 30PB) temporarily store the received data (YES in ST170 of FIG. 30) (ST17).
1) If the data is complete (N in ST172)
O), this is registered in a memory (for example, HDD) (ST1)
73) At the same time, transmission confirmation information (received information ... success) is transmitted (responded) to the transmitting station side using another communication means (the land line 39) (ST174).

If data (D) cannot be received (ST
170 (NO in ST170), the receiving station (for example, 30PA) that has determined that the received data is incomplete or unsuccessful (YES in ST172), the reception line failed, so The transmission confirmation information (received information ... success) used is not transmitted (ST174).

The transmitting station (transmitting station 20P) that has received the acknowledgment information via the land line 39 (YES in ST152 of FIG. 28) uses the receiving station (receiving station 30PB) as a delivery confirmed station. Stored in the delivered table (ST15
3 is YES, ST154). The data is collected and stored for all receiving stations (receiving stations) to be transmitted. ST
156 is other processing.

[0008] Thus, when there is a request to extract an undelivered station (reception station) (YES in ST157 of FIG. 29), the control unit refers to the reception station list table and the transmitted table (ST1).
58, ST159) to extract the undelivered station, that is, the receiving station 30PA (receiving station side) not stored in the transmitted table (ST160), and extract the undelivered station (30P
A) is stored in the undelivered station table (ST161, ST161).
162).

Then, a retransmission request (YE of ST163)
When S) is performed, the non-delivery station table is referred to (ST16).
4) Then, the undelivered station (the receiving station 3
0PA) while retransmitting the data using a land line, that is, performing backup transmission (ST165). It transmits to all undelivered stations (YES in ST166).

The undelivered station (receiver station 30PA) temporarily stores (ST171) the data received via the land line 39 (YES in ST175 in FIG. 30) and when the data is complete (YES in ST172). Is registered in a memory (for example, HDD) (ST173), and acknowledgment information (received information ...
Is transmitted to the transmitting station side (20PA) (ST17).
4). The reliability of the terrestrial line 39 is higher than the case where the ground line 39 passes through the communication satellite 50.

Receiving the acknowledgment information via the ground line 39 (YES in ST152 in FIG. 28, YE in ST153)
S), the transmitting station side (transmitting station 20P) stores the receiving station 30PA (receiving station side) in the delivered table (S).
T154). Therefore, it is deleted from the undelivered station table (ST155). The contents of the delivered table are cleared at the appropriate time thereafter.

[0012]

The transmission via the communication satellite 50, which can transmit a large amount of data to a large number of receiving stations (30) at a time, is fixed in the contract time zone. In many cases, the so-called land line (wired / wireless) 39 for this satellite communication is
It is often a pay-as-you-go system.

Here, in the conventional system, in order to confirm data transmission from the headquarters (transmitting station side) to each store (receiving station side) via the communication satellite 50, each store (receiving station) from which data could be received was confirmed. Side) to the headquarters (transmitting station side) to report (delivery acknowledgment information) that data could be received using other communication means (39).

The headquarters (transmitting station side) analyzes the collected acknowledgment information, extracts each store (receiving station side) that cannot receive the acknowledgment information, and extracts each of the extracted receiving stations, ie, the communication satellites 50. Undelivered stations that cannot receive the data by communication via the network will send the data to other communication means (ground line 39).
The backup transmission is performed by using the above.

Thus, since reports from a large number (for example, 5000) of stores (receiving stations) are concentrated on the other communication means (39) at one time, the land line 39 and the transmitting station are busy, and the delivery confirmation is made. Information transmission delays and information loss are likely to occur. That is, since the data cannot be backed up to the undelivered station, the overall operation is hindered.

Further, other communication means (39) are expensive due to the pay-as-you-go system, and are disadvantageous in terms of management. In addition, as the scale increases, the number of stores (receiver stations) where transmission was overwhelmingly larger than the number of stores (receiver stations) that could not transmit via the communication satellite 50 was overwhelmingly large. The imposition of obligations is also considered extremely disadvantageous in terms of data processing burden and time.

An object of the present invention is to significantly reduce the amount and time of data transmitted / received by other communication means not via a communication satellite, and to reduce the amount of data transmitted / received between each receiving station and the transmitting station via a communication satellite. It is an object of the present invention to provide a data transmission / reception system capable of quickly and accurately transmitting / receiving information on a result using another communication means.

[0018]

According to a first aspect of the present invention, each receiving station receives data transmitted from a transmitting station and passed through a communication satellite, and the data is transmitted between each receiving station and the transmitting station. In a data transmission / reception system via a communication satellite formed so as to be able to transmit / receive information on a data transmission / reception result using another communication means that does not pass through the communication satellite,
The transmitting station is configured to be able to transmit the data with a header to which a different serial code is added to each data to each of the receiving stations via the communication satellite, and each of the receiving stations is configured to perform the communication When the data with the header to which the serial number is added is received via the satellite, the serial number can be stored in the code memory, and the current number is received in the serial number previously stored in the code memory. It is possible to determine whether or not there is a missing serial number older than the one, and when it is determined that there is a missing serial number, the undelivered information added with the missing serial number is transmitted to the transmitting station side. A data transmission / reception system via a communication satellite formed so as to be able to transmit using the other communication means.

According to this invention, the transmitting station side prepares data with a header (for example, N1, N2, N3,...) To which different serial numbers (for example, N1, N2, N3,. For example, N3 with D3) is transmitted to each receiving station via a communication satellite. When each receiving station receives data (D3) with a header to which a serial number (for example, N3) is added via a communication satellite, the serial number (N3)
Is stored in the code memory. Further, it is determined whether or not the serial number (N1, N3) stored in the code memory before that includes a serial number (N2) that is older and missing than that received this time (serial number... N3). Is determined.

When it is determined that there is a missing serial number code (N2), the non-delivery information added with the missing serial number code (N2) is transmitted to the transmitting station using another communication means. That is, the transmitting station has serial numbers (N1, N2, N
(3,...) (D1, D2, D3,...)
Among them, only the receiving station that has self-diagnosed that there was data (D2) that could not be received before is reported via other communication means (undelivered information). Reports from the majority of receiving stations that do not have missing serial numbers are omitted. That is, with respect to such a response, the load on other communication means can be significantly reduced.

Therefore, each receiving station can retroactively detect that data has not been delivered,
Data transmission / reception results between each receiving station and transmitting station and via communication satellites, while avoiding report concentration of other communication means that do not go through communication satellites and greatly reducing the amount and time of transmitted / received data It is possible to quickly and accurately transmit and receive the information about other communication means.

Also, the invention of claim 2 enables the transmitting station side to transmit the header to which the data is omitted and the serial number code is added to the receiving station side via the communication satellite. When each of the receiving stations receives the header to which the data is omitted and the serial number is added via the communication satellite, the serial number is formed so as to be stored in the code memory. After receiving the header to which the data is omitted and to which the serial number code is added, whether or not any of the serial number codes stored in the code memory before that is missing and older than the one received this time. It is also possible to determine whether there is a missing serial number code, and to transmit the undelivered information added with the missing serial number code to the transmitting station using the other communication means. Communication satellite A data transmitting and receiving system through.

In this invention, the transmitting station receives each data header (eg, D1, D2, D3,...) And adds a serial number (eg, N1, N2, N3,. It is transmitted to the station via a communication satellite. When each receiving station side receives a header to which a serial number (for example, N3) is added via a communication satellite, the receiving station uses the serial number (N3).
3) is stored in the code memory. Further, it is determined whether or not the serial number (N1, N3) stored in the code memory before that includes a serial number (N2) that is older and missing than that received this time (serial number... N3). Is determined.

When it is determined that there is a missing serial number (N2), the non-delivery information added with the missing serial number (N2) is transmitted to the transmitting station using another communication means. In other words, only the receiving station that has self-diagnosed that the header added with the missing serial number code (N2) could not be received before has received a report (undelivered information) via other communication means. Done. The report from the majority of receiving stations that the serial number code is not missing is omitted.

Therefore, in addition to providing the same operation and effect as the case of the first aspect of the present invention, since the data amount of the header transmission from the transmitting station to each receiving station via the communication satellite is small, the transmission is performed. Time can be greatly reduced, and untransmitted information from each receiving station can be quickly collected at the transmitting station. For example, before transmitting each data, only the header is transmitted and the communication status via the communication satellite is transmitted. Therefore, it can be executed frequently because the usability such as percussion is improved and short-time communication is sufficient.

According to a third aspect of the present invention, each of the receiving stations receives data transmitted from the transmitting station and passing through a communication satellite, and the communication between the receiving station and the transmitting station is performed. In a data transmission / reception system via a communication satellite formed so as to be able to transmit / receive information on a data transmission / reception result using another communication means not via a satellite, the transmitting station side may set a header to which a set next scheduled transmission date and time is added. The data with the header is formed so as to be transmittable to the respective receiving stations via the communication satellite, and each of the receiving stations is provided with a header to which the next scheduled transmission date and time is added via the communication satellite. When the next transmission is scheduled, the next scheduled transmission date and time can be stored in the scheduled date and time memory, and the next transmission scheduled date and time corresponding to the next scheduled transmission date and time stored in the scheduled date and time memory. It is possible to determine whether the data with the header with the date and time has been received or not, and the data with the header with the next scheduled transmission date and time until the date and time corresponding to the next scheduled transmission date and time stored in the scheduled date and time memory. A data transmission / reception system via a communication satellite which is configured to be able to transmit undelivered information to the transmitting station side by using the other communication means when it is determined that the information has not been received.

In this invention, the transmitting station side, for example,
At 1:00, the set next scheduled transmission date and time (for example, 1
2:00) (for example, D
11) is transmitted to each receiving station via a communication satellite. Each receiving station transmits the next scheduled transmission date and time (1
2:00), the next scheduled transmission date and time (12:00) is stored in the scheduled date and time memory. Data is stored.

Next, the next scheduled transmission date and time (12:00) stored in the scheduled date and time memory is monitored, and the date and time (for example, 1) corresponding to the next scheduled transmission date and time (12:00) is monitored.
By 2:00 to 12:05), it is determined whether or not the data with the header to which the next scheduled transmission date and time (for example, 13:00) is added has been received.

Then, the next scheduled transmission date and time (13:00)
The next transmission scheduled date / time (12:00) stored in the scheduled date / time memory with the header-added data (D12) to which
If it is determined that the information has not been received by the date and time (12:00 to 12:05) corresponding to the non-delivery information, the non-delivery information is transmitted to the transmitting station using another communication means.

That is, the transmitting station reports (undelivered information) via other communication means only from the receiving station that failed to receive the next data managed at the next scheduled transmission date and time. Reports from the majority of receiving stations that have been received by the next scheduled transmission date and time are omitted. That is,
With respect to such a response, the load on other communication means can be significantly reduced.

Since the undelivered information is generated at each next scheduled transmission date and time, for example, a serial number code or the like for specifying an undelivered target is added to the undelivered information without adding it to the undelivered information. There is no problem sending to.

Therefore, each receiving station can detect in real time that data has not been delivered at the time corresponding to the next scheduled transmission date and time, and can avoid concentration of reports by other communication means without passing through a communication satellite. While greatly reducing the amount and time of transmitted / received data, the transmission / reception using other communication means between each receiving station and the transmitting station and information on the result of data transmission / reception via a communication satellite can be performed quickly and accurately. I can do it. In addition, if data can be transmitted only once from the transmitting station to the receiving station for the first time, even if the antenna of the receiving station falls down due to strong wind, the receiving station can help other communication means ( By borrowing (data backup transmission), it is possible to know that data has not been delivered at each scheduled transmission date and time.

According to a fourth aspect of the present invention, the transmitting station can transmit the header to which the data is omitted and the next scheduled transmission date and time are added to the receiving stations via the communication satellite. Formed in

When each of the receiving stations receives the header to which the data is omitted and the next scheduled transmission date and time is added, the next scheduled transmission date and time can be stored in the scheduled date and time memory. Whether the data with the header with the next scheduled transmission date and time or the data with the header omitted and the header with the next scheduled transmission date and time added by the date and time corresponding to the next scheduled transmission date and time stored in The next scheduled transmission date and time in which the header-attached data to which it is possible to determine whether or not and the next scheduled transmission date and time is added or the header to which the data is omitted and the next scheduled transmission date and time is stored in the scheduled date and time memory If it is determined that the data could not be received by the date and time corresponding to, the undelivered information can be transmitted to the transmitting station using the other communication means. A data transmission and reception system via the communication satellite is formed.

In this invention, the transmitting station side, for example,
At 1:00, a header in which the data (D11) is omitted and a set next scheduled transmission date and time (for example, 12:00) is added is transmitted to each receiving station via a communication satellite.
When each receiving station receives a header to which the next scheduled transmission date and time (12:00) is added via a communication satellite,
The next scheduled transmission date and time (12:00) is stored in the scheduled date and time memory.

Next, the next scheduled transmission date / time (12:00) stored in the scheduled date / time memory is monitored, and the date / time (for example, 1) corresponding to the next scheduled transmission date / time (12:00) is monitored.
It is determined whether or not data with a header to which the next scheduled transmission date and time (for example, 13:00) is added (or a header from which data is omitted) has been received by 2:00 to 12:05).

The next scheduled transmission date and time (13:00)
Is added to the data with the header (or the header in which the data is omitted and the next scheduled transmission date and time is added) in the next scheduled transmission date and time (12:
If it is determined that the data could not be received by the date and time corresponding to (00), the undelivered information is transmitted to the transmitting station using another communication means.

That is, the transmitting station reports (undelivered information) via other communication means only from the receiving station that could not receive the next data managed at the next scheduled transmission date and time. Reports from the majority of receiving stations that have been received by the next scheduled transmission date and time are omitted. That is,
With respect to such a response, the load on other communication means can be significantly reduced.

Therefore, in addition to providing the same operation and effect as the case of the third aspect of the present invention, since the data amount of the header transmission from the transmitting station to each receiving station via the communication satellite is small, the transmission is performed. Time can be greatly reduced, and untransmitted information from each receiving station can be quickly collected at the transmitting station. For example, before transmitting each data, only the header is transmitted and the communication status via the communication satellite is transmitted. Therefore, it can be executed frequently because the usability such as percussion is improved and short-time communication is sufficient.

Further, in the invention according to claim 5, the next transmission scheduled date and time are added to the undelivered information transmitted from each of the receiving stations to the transmitting station using the other communication means. This is a data transmission / reception system via a communication satellite.

In this invention, each receiving station transmits the undelivered information to which the next scheduled transmission date and time is added to the transmitting station using another communication means. Therefore, in addition to providing the same operation and effect as in the case of each of the inventions of claims 3 and 4, the transmitting station can accurately grasp the undelivered station and the data for the undelivered station can be obtained. Backup transmission using other transmission means can be performed more reliably.

Further, according to a sixth aspect of the present invention, each of the receiving stations receives data transmitted from the transmitting station and passing through the communication satellite, and the communication between the receiving station and the transmitting station is performed. In a data transmission / reception system via a communication satellite formed so as to be able to transmit / receive information on a data transmission / reception result using another communication means that does not pass through a satellite, the transmitting station side sets a next scheduled transmission date and time and each of the data. The data with the header to which a different serial number code is added is formed so as to be transmittable to each of the receiving stations via the communication satellite, and each of the receiving stations is set to the next time via the communication satellite. When the data with a header to which a different serial number code is added for each of the data and the scheduled transmission date and time is received, the next scheduled transmission date and time can be stored in the scheduled date and time memory and the serial number The code number can be stored in the code memory, and it is possible to determine whether the serial code stored earlier in the code memory includes a missing serial number code that is older than that received this time and is missing. When it is determined that there is a number code, the undelivered information added with the missing serial number code is formed to be transmittable to the transmitting station side using the other communication means. It is possible to determine whether or not the data with the header with the next scheduled transmission date and time added thereto by the date and time corresponding to the next scheduled transmission date and time stored in the memory has been received via the communication satellite, and the next scheduled transmission date and time If it is determined that the data with the header to which was added could not be received by the date and time corresponding to the next scheduled transmission date and time stored in the scheduled date and time memory, the next scheduled transmission date and time or the corresponding serial number code The undelivered information added is a data transmission and reception system via the communications satellite that is transmittable formed by using the other communication means to the transmitting station.

In this invention, the transmitting station side, for example,
At 1:00, the set next scheduled transmission date and time (for example, 1
2:00) and data (eg, D1, D2, D3,
..) Are different from each other (for example, N1, N2, N3,
..) Is added to the data with a header (for example, N3 attached D
3) is transmitted to each receiving station via a communication satellite.

Each receiving station monitors the next scheduled transmission date and time (12:00) stored in the scheduled date and time memory, and checks the date and time (for example, 12:00) corresponding to the next scheduled transmission date and time.
To 12:05), the next scheduled transmission date and time (for example, 1
It is determined whether or not the data (D3) with the header added with (3:00) has been received via the communication satellite.

The data (D3) with the header to which the next scheduled transmission date and time (13:00) is added is stored in the scheduled date and time memory and corresponds to the next scheduled transmission date and time (12:00). If it is determined that the reception was not possible by 12:05), the next scheduled transmission date and time (12: 0)
0) or the undelivered information to which the serial number (N3) has been added is transmitted to the transmitting station using another communication means.

The data (D3) with the header to which the next scheduled transmission date and time (13:00) is added is stored in the scheduled date and time memory at the date and time (12:00) corresponding to the next scheduled transmission date and time (12:00). If it is determined that the reception has been completed by the time of the next transmission scheduled date and time (13: 12: 05: 00: 12: 05).
00) is stored in the scheduled date and time memory. Data is stored.

On the other hand, each receiving station transmits the data (D3) with a header to which the set next scheduled transmission date and time (12:00) and a different serial number (N3) are added for each data via a communication satellite. Then, the next scheduled transmission date and time (12:00) is stored in the scheduled date and time memory, and the serial number code (N3) is stored in the code memory.

Thereafter, it is determined whether or not there is a missing serial number code (N2) older than that received this time (N3) among serial number codes (N1, N3) stored in the code memory before that. Determine. When it is determined that there is a missing serial number code (N2), the non-delivery information added with the missing serial number code (N2) is transmitted to the transmitting station using another communication means.

That is, only the receiving station that failed to receive the next data managed at the next scheduled transmission date and time is reported to the transmitting station via another communication means (undelivered information). Reports from the majority of receiving stations that have been received by the next scheduled transmission date and time are omitted. Also,
The transmitting station reports (undelivered information) via other communication means only from the receiving station that has self-diagnosed that there was data that could not be received before among the data managed by the serial code. You. Reports from the majority of receiving stations that do not have missing serial numbers are omitted. That is, with respect to such a response, the load on other communication means can be significantly reduced.

Therefore, while avoiding the concentration of reports of other communication means that do not pass through the communication satellite, the amount and time of transmitted / received data are greatly reduced, and the communication satellite is connected between each receiving station and the transmitting station. It is possible to quickly and accurately transmit and receive information on the result of data transmission and reception using another communication means.
In addition, each receiving station can detect in real time that data has not been delivered at the time corresponding to the next scheduled transmission date and time. Furthermore, if data can be transmitted only once from the transmitting station to the receiving station for the first time, even if the antenna of the receiving station falls down due to a strong wind, the receiving station can help other communication means. If borrowed, it is possible to know that data has not been delivered at each scheduled transmission date and time. Further, since each receiving station side can retroactively detect that data has not been transmitted using the serial number code, the reliability is high.

Further, in the invention according to claim 7, the transmitting station side may include a header in which the data is omitted, a set next scheduled transmission date and time, and a different serial number added to each data. Side so that the data can be transmitted via the communication satellite, and each of the receiving stations receives a header in which the data is omitted and a set next scheduled transmission date and time and a serial number code added to each data are added. In this case, the next scheduled transmission date and time can be stored in the scheduled date and time memory and the serial number code can be stored in the code memory, and the serial number code previously stored in the code memory has a smaller number than the one received this time. It is also possible to determine whether there is an old missing serial number code and if it is determined that there is a missing serial number code, the undelivered information added with the missing serial number code is sent to the transmitting station side to the other The data with a header, which is formed so as to be transmittable using communication means, and wherein each of the receiving stations has a next transmission scheduled date and time added by the date and time corresponding to the next transmission scheduled date and time stored in the scheduled date and time memory. Or it is possible to determine whether the data has been omitted and the header with the next scheduled transmission date and time has been received, and the data with the header with the next scheduled transmission date and time or the data has been omitted. If it is determined that the header with the next scheduled transmission date and time cannot be received by the date and time corresponding to the next scheduled transmission date and time stored in the scheduled date and time memory, the next scheduled transmission date and time or the serial number code is added. Data transmission / reception system via a communication satellite formed so as to be able to transmit the undelivered information to the transmitting station using the other communication means. It is a non.

In this invention, the transmitting station side, for example,
At 1:00, a different serial number (for example, N3) is added for each data (for example, D1, D2, D3,...) For which data is omitted and the next scheduled transmission date and time (for example, 12:00) and data (for example, D1, D2, D3,...). The received header is transmitted to each receiving station via a communication satellite.

When each receiving station receives a header in which the data is omitted and the set next scheduled transmission date and time (12:00) and a different serial number (N3) is added to each data, the next reception is performed. The scheduled transmission date and time (12:00) is stored in the scheduled date and time memory, and the serial number (N3) is stored in the code memory. Data is stored.

Each receiving station monitors the next scheduled transmission date and time (12:00) stored in the scheduled date and time memory, and determines the date and time (for example, 12:00) corresponding to the next scheduled transmission date and time.
To 12:05), the next scheduled transmission date and time (for example, 1
3:00) (or data with the header) has been received.

The data with the header to which the next scheduled transmission date and time (13:00) is added (or the header to which the next scheduled transmission date and time is added) corresponds to the next scheduled transmission date and time stored in the scheduled date and time memory. Date and time (12:00 to 1
2:05), if it is determined that the data could not be received, the next transmission scheduled date and time (13:00) or the undelivered information added with the serial number (N3) is transmitted to the transmitting station by the other communication means. Send using.

On the other hand, it is determined whether or not the serial number (N1, N3) previously stored in the code memory includes a serial number code (N2) that is older than that received this time and is missing. When it is determined that there is a missing serial number code (N2), the non-delivery information added with the missing serial number code (N2) is transmitted to the transmitting station using another communication means.

Therefore, in addition to providing the same operation and effect as the case of the sixth aspect of the present invention, since the data amount of the header transmission from the transmitting station side to each receiving station side via the communication satellite is small, the transmission is performed. Time can be greatly reduced, and untransmitted information from each receiving station can be quickly collected at the transmitting station.For example, before transmitting data, only the header is transmitted and the communication status via the communication satellite can be reduced. Since the usability such as percussion is improved and the time is short, it can be frequently executed.

[0058]

Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) This data transmission / reception system has the same basic configuration (20, 30, 50, etc.) as the product sales data (20P, 30P, 50, etc.) in the case of the conventional example (FIG. 27). It is a processing system.
As shown in FIG. 8, the transmitting station side (10, 20) transmits the data with the header added with a different serial number (N) for each data (D) to each receiving station side (30) via the communication satellite 50. When each receiving station side (30) receives data with a header to which a serial number code is added, the serial number code can be stored in the code memory 33FM, and before that, it can be stored in the code memory 33FM. It is possible to determine whether or not the stored serial number includes a missing serial number that is older than that received this time, and when it is determined that there is a missing serial number, the missing serial number code is used. The non-delivery information to which the information is added can be transmitted to the transmitting station (10) by using another communication means (39).

That is, a sequence number (serial number code) N is additionally transmitted from the transmitting station side (10, 20) to the receiving station side (30) using the data transmission via the communication satellite 50, and the receiving station side. The non-delivery of data is formed retroactively in (30), and only the receiving station (30) that has detected the non-delivery detects the transmitting station (10, 10) using other communication means (39).
20) The non-delivery information to the side is formed to be transmittable.

Further, in the first embodiment, the transmitting station (10, 20) transmits a header to which data is omitted and a serial number code is added to each receiving station (30) via the communication satellite 50. When each receiving station side (30) receives a header to which data is omitted and a serial number code is added via the communication satellite 50, the receiving station side (30) is similar to the case where the data with the header is received. To the serial number code in the code memory 33FM
It is possible to determine whether there is a missing serial number code that can be stored and older than the one received this time, and if it is determined that there is a missing serial number code, the undelivered information added with the missing serial number code is It is formed so as to be able to transmit to the transmitting station side (10) by using another communication means (39).

In other words, only a header having a small data amount to which a sequence number is added is transmitted, so that the data transmission time via the communication satellite 50 is greatly reduced, and the data can be repeatedly transmitted.

In FIG. 1, a head office (host computer) 10 provided in the head office comprises a CPU 11, a ROM 1
2, RAM 13, keyboard (KB) 14, display (I
ND) 15, HDD 16, wired line (for example, ISD)
N) a wired communication circuit 17 for 19 and a wired communication circuit 18 for a land line [wired line (for example, ISDN)] 39 forming other communication means, and each store (store machine ... receiving station 30) It has a function of distributing various master data (for example, file data) related to merchandise sales operations.

The RAM 13 has a data table 13 for each N
NT, a non-delivery table 13 MST is provided. Both tables 13NT and 13MST are backed up by the HDD 16.

The headquarters unit 10 is connected via a wired line 19 to a transmitting station 20 as a transmitting station. In the present invention, the headquarters 10 (headquarters) and / or the transmitting station 20
Is defined as the transmitting station. In the first embodiment, the transmitting station 20 is defined as the transmitting station in relation to the communication satellite 50, and the main unit 10 is defined as the transmitting station in relation to the other communication means (39). .

The transmitting station 20 comprises a CPU 21 and a ROM 2
2, RAM 23, wired communication circuit 27 and antenna 28
A, which includes a wireless communication circuit 28 connected to A, can wirelessly transmit data relating to merchandise sales business transmitted from the headquarters 10 by wire to the receiving station 30 via the communication satellite 50.

Store machines arranged in each store (receiving station side)
The receiving station 30 is a CPU 31, a ROM 32, a RAM,
33, keyboard (KB) 34, display (IND) 3
5, HDD 36, network (for example, LAN) 49
A wire line (for example, an interface (I / F) 37) to which a plurality of terminals (electronic cash registers) 40 are connected via a wireless communication circuit 38 connected to an antenna 38 A and other communication means (39) It includes a wired communication circuit 45 for ISDN, constitutes a top-level device in a store, and has a collective management function for each terminal 40.

The other communication means is for transmitting data via the communication satellite 50 (satellite communication).
Ground line 39. However, other communication means (ground line 39)
Is not limited to wired, and wireless may be employed for a part or all of the wired.

The receiving station 30 constitutes a receiving station side with respect to the transmitting station side (headquarters 10), and can manage various received master data (file data) to each terminal 40 as necessary. It is.

Here, if there is a transmission request (YES in ST10 of FIG. 2), the transmitting station side (10, 20) increments the serial number code (case number N) (N = N + 1) (ST1).
1), a data (for example, D) message with a head added with the sequence number (number) N (“00001”) shown in FIG. 4 is transmitted to the communication satellite 50 as shown in FIG.
(ST13). The data D of the sequence number N (“00001”) is stored in the N-by-N data table 13NT shown in FIG. 1 (ST14).

When only the header is selected (YES in ST12), only the header in which the data (D) is omitted from the data message shown in FIG. Send via ST (ST
15) is performed. Also in this case, the data non-sequence number N is stored in the memory (in this embodiment, the N-based data table 13NT) (ST16).

The receiving station side (30) receiving this (YES in ST30 of FIG. 7) temporarily stores (ST31) and determines whether or not the data message is complete. If the data is incomplete or if all data cannot be received, the reception has failed (YES in ST32).

If the data message is complete (N in ST32)
O), the storage control means (CPU 31, ROM 32) stores the data (D) with the sequence number (N = "00001") in the code memory 33FM (ST34). The data (D) is stored in a dedicated data memory (RAM, HDD,
, Etc.).

When data is omitted (YES in ST33)
Stores only the sequence number (N = “00001”) in the code memory 33FM (ST35).

Thereafter, the transmitting station (transmitting station 20)
As shown in FIG. 6, the sequence number (N = “0000”)
The data (D) with 2 ″) is transmitted via the communication satellite 50 (ST13 in FIG. 2).

On the other hand, the receiving station side (receiving station 30
B) was able to receive the data and store it in the code memory 33FM (ST34 in FIG. 7). However, since the receiving station side (receiving station 30A) has failed in receiving (YES in ST32 of FIG. 7) as represented by the dotted line in FIG. 6, the data (N = “00002”) with the sequence number (N = “00002”) D) cannot be stored in the code memory 33FM.

After that, the transmitting station side (transmitting station 20)
Is a sequence number (N = “0000”) as shown in FIG.
The data (D) attached with 3 ″) is transmitted via the communication satellite 50 (ST13 in FIG. 2). On the other hand, the receiving station side (the receiving stations 30A and 30B) can receive the data and code It is assumed that the data is stored in the memory 33FM (ST34 in FIG. 7).

Here, in the receiving station 30B, the sequence number N is serially stored in the code memory 33FM (“00001”,
Since it is stored as “00002”, “00003”), there is no problem. However, the receiving station 30A is configured as shown in FIG.
As shown by the dotted line, the reception failed (Y in ST32 of FIG. 7).
ES), the sequence number (N = “00002”) is missing in the code memory 33FM (FIG. 7).
Of ST36).

Thus, the receiving station 30A transmits the undelivered information indicating that the data (D) of the sequence number ("00002") could not be received to another communication means (the ground line 39).
Is transmitted as shown in FIG. 8 (ST37).

The transmitting station (10) receives the undelivered information from the receiving station 30A (YES in ST17 of FIG. 2, ST18).
If YES, the storage control means (CPU 11, ROM
12) shows the corresponding device (30A) and the sequence number N (“00002”) in the non-delivery table 13MST shown in FIG.
Is stored (ST19). Note that ST20 is another process.

When the transmitting station (10) issues a retransmission request (YES in ST21 of FIG. 3), retransmission control means (CPU11, ROM12, CPU21, ROM2)
2) refers to the non-delivery table 13MST and the N-by-N data table 13NT (ST22, ST23), extracts data (D) corresponding to the sequence number N ("00002") (ST24), and sets the data as a backup line. Undelivered station (3) using land line 39 (other communication means)
0A), the data is retransmitted, that is, backed up (ST25).

Since the undelivered station (30A) has thus become a transmitted station, the storage is deleted from the undelivered table 13MST (ST26). Undelivered table 13 MST
(Step ST27: YES).

In the first embodiment, the transmitting station (1
0, 20) is data (for example, D1, D2, D3,
..) (For example, N1 = “0000”)
1 ", N2 =" 00002 ", N3 =" 00003 ",
..) Is added to the data with a header (for example, N3 with D
3) to each receiving station side (30A, 30B,...)
0 (YES to ST10 in FIG. 2).
13).

Each receiving station side (30A, 30B) sends a serial code (for example, N3 = “0000”) via the communication satellite 50.
When the data (D3) with the header to which "3") is added is received, the serial number (N3 = "00003") is stored in the code memory 33FM (YES in ST30 of FIG. 7).
To ST34).

Further, the serial numbers (N1 = “00001”, N3) stored in the code memory 33FM before that.
= “00003”), the one received this time (serial number code N)
3 = “00003”) and whether or not there is a missing serial number (N2 = “00002”).

Then, the missing serial number code (N2 = “00
002 ") (YES in ST36)
The non-delivery information added with the missing serial number code (N2 = “00002”) is transmitted to the transmitting station side (10) by another communication means (3).
The transmission is performed using 9) (ST37). That is, on the transmitting station side (10), the data (D2) which could not be received before among the data (D1, D2, D3,...) Managed by the serial number codes (N1, N2, N3,. Only the receiving station (30A) that has self-diagnosed that there is another communication means (39)
(Undelivered information). Reports from the majority of receiving stations (30B,...) In which serial numbers are not missing are omitted. In other words, with respect to such a response, the load on other communication means (the land line 39) can be significantly reduced.

Therefore, each receiving station (30) can retroactively detect that data has not been delivered, and can use other communication means (39) not via the communication satellite 50.
Of each receiving station (30) and the transmitting station (1) while avoiding the report concentration and greatly reducing the amount and time of transmitted / received data.
0, 20) and information on the result of data transmission / reception via the communication satellite 50 can be transmitted / received using other communication means (39) quickly and accurately.

The transmitting station (10, 20) has a header in which data (eg, D1, D2, D3,...) Are omitted and serial numbers (eg, N1, N2, N3,...) Are added. Only the message can be transmitted to each receiving station side (30) via the communication satellite 50 (YES in ST12 of FIG. 2).

When each receiving station side (30) receives a header to which a serial number (for example, N3) is added via the communication satellite 50 (YES in ST33 of FIG. 7), the serial number is (N3) is stored in the code memory 33FM (ST3).
5).

Further, among the serial numbers (N1, N3) stored in the code memory 33FM before that, the serial number code (N2) that is older and missing than that received this time (serial number... N3). It is determined whether or not there is (St36).

When it is determined that there is a missing serial number code (N2), the non-delivery information added with the missing serial number code (N2) is transmitted to the transmitting station (10) by another communication means (3).
The transmission is performed using 9) (ST37).

That is, similarly to the case of the data with the header, the transmitting station (10) self-diagnoses that the header to which the missing serial number (N2) has been added could not be received before, as in the case of the data with the header. ), A report (undelivered information) is made via another communication means (39). Reports from the majority of receiving stations (30B,...) That the serial number code is not missing are omitted.

Thus, since the amount of data for header transmission from the transmitting station side (10, 20) to each receiving station side (30) via the communication satellite 50 is small, the transmission time can be greatly reduced, and the transmission can be greatly reduced. Each receiving station side (30) at the station side (10)
Since the undelivered information can be quickly collected, for example, only the header is transmitted before transmission of each data to check the communication state via the communication satellite 50. Can be performed.

(Second Embodiment) The second embodiment has a basic configuration similar to that of the first embodiment (FIG. 1), but differs from that of the first embodiment. Transmits a serial number (N) from the transmitting station side (10, 20) to each receiving station side (30) and makes each receiving station side (30) perform self-diagnosis so that retroactive data loss can be detected. Had been
In the second embodiment, the next transmission scheduled date and time is transmitted from the transmitting station side (10, 20) to each receiving station side (30), and each receiving station side (30) performs self-management, and data is lost at each scheduled time. Is formed so as to be able to detect the presence or absence in real time.

That is, in this embodiment, FIGS.
As shown in FIG. 7, the transmitting station (10, 20) is configured to be able to transmit the data with a header to which the scheduled transmission date and time is added to each receiving station (30) via the communication satellite 50, When each receiving station side (30) receives data with a header to which the next scheduled transmission date and time is added via the communication satellite 50, the next scheduled transmission date and time is stored in the scheduled date and time memory (33NJ).
M) and a scheduled date and time memory (33
NJM), it is possible to determine whether or not the header-added data with the next scheduled transmission date and time has been received by the date and time corresponding to the next scheduled transmission date and time, and the header-added data with the next scheduled transmission date and time added. Scheduled date and time memory (33N
If it is determined that the data could not be received by the date and time corresponding to the next scheduled transmission date and time stored in the JM), the undelivered information can be transmitted to the transmitting station (10) using another communication means (39). Have been.

That is, the next data transmission schedule is added in advance from the transmitting station side (10, 20) to the receiving station side (30) using the data transmission via the communication satellite 50, and the receiving station is added. The side (30) monitors the schedule and forms data non-delivery in a real-time detectable manner, and the transmitting station using other communication means (39) only from the receiving station side (30) that has detected non-delivery. Side (10,2
The non-delivery information to the 0) side can be transmitted.

In the second embodiment, the transmitting station (20) sends a header to which data is omitted and the next scheduled transmission date and time is added to each receiving station (30) via the communication satellite 50. When the receiving station side (30) receives the header with the data omitted and the next scheduled transmission date and time added, the next scheduled transmission date and time can be stored in the scheduled date and time memory (33NJM). At the same time, data with a header to which the next scheduled transmission date and time is added by the date and time corresponding to the next scheduled transmission date and time stored in the scheduled date and time memory (33NJM) (or the data is omitted and the next scheduled transmission date and time is added) It is possible to determine whether or not the header has been received and to add the header-attached data to which the next scheduled transmission date and time has been added (or to omit the data and add the next scheduled transmission date and time). Scheduled to da) date and time memory (33NJ
If it is determined that reception has not been completed by the date and time corresponding to the next scheduled transmission date and time stored in M), the undelivered information is formed to be transmittable to the transmitting station (10) by using another communication means (39). Have been.

Further, the next scheduled transmission date and time are added to the undelivered information transmitted from each receiving station side (30) to the transmitting station side (10) using another communication means (39). The scheduled date and time memory (33NJM) is formed in the RAM 33 in the same manner as the code memory 33FM of the first embodiment.

Here, when there is a transmission request (YES in ST40 of FIG. 9), the transmitting station side (10, 20) refers to the scheduled transmission date and time table (13SYNT) (ST41) and transmits the transmission date and time (for example, 1999). / 11 / 01-12: 00)
(YES in ST42), the next scheduled transmission date and time (1999/11 / 01-12: 45) is read (ST42).
43), the next scheduled transmission date and time (for example, 1999/1
The data message with the header shown in FIG. 12 to which "1 / 01-12: 45" is added is transmitted via the communication satellite 50 as shown in FIG. 13 (ST45).

The scheduled transmission date and time table (13SYN)
The next scheduled transmission date and time stored in T) is entered by key input (FIG. 1).
1 (YES in ST58, YES in ST59)
Can be updated. The next scheduled transmission date and time of a plurality of stages may be set and stored in advance, and the system may be configured to be automatically updated.

The next scheduled transmission date and time (for example, 1999
/ 11 / 01-12: 45) is added to the data with header shown in FIG.
It is stored in the date and time data table (13NJT) similar to NT (ST46).

When only the header is selected (YES in ST44), only the header in which the data (D) is omitted from the data message shown in FIG. 12 and the next transmission scheduled date and time is added is transmitted. Transmission via satellite 50 (S
T47). Also in this case, the data non-date / time is stored in the date / time data table (13NJT) (ST48).

This is received (YES in ST70 of FIG. 15).
The receiving station side (30) temporarily stores (ST71) and determines whether or not the data message is complete. If the data is incomplete or if all data cannot be received, the reception has failed (YES in ST72).

If the data message is complete (N in ST72)
O), the storage control means (CPU 31, ROM 32) stores the data (D) with the next scheduled transmission date and time (1999/11 / 01-12: 45) in the scheduled date and time memory (33NJM) (ST74). When data is omitted (YE in ST73)
S) is the next scheduled transmission date and time (1999/11 / 01-1).
2:45) is stored (ST75). Data (D)
May be formed so as to be stored in a special memory.

After that, the transmitting station side (transmitting station 20)
As shown in FIG. 14, the next scheduled transmission date and time (1999/11
/ 01-12: 45), the next scheduled transmission date and time (19) read from the scheduled transmission date and time table (13SYNT).
The data (D) attached with the data is transmitted via the communication satellite 50 (ST45 in FIG. 9).

On the other hand, the receiving station side (receiving station 30
B) can receive the data and the scheduled date and time memory (33)
NJM) (ST74 in FIG. 15). But,
As indicated by the dotted line in FIG. 14, the receiving station side (receiving station 30A) has failed in receiving (YES in ST72 of FIG. 15), so the next scheduled transmission date and time (1999/11 / 01-).
14:00) is stored in the scheduled date and time memory (33).
NJM).

Here, the receiving station 30B was able to receive data at the next scheduled transmission date and time (1999/11 / 01-12: 45) stored in the scheduled date and time memory (33NJM) (ST76 in FIG. 16). YES, ST77, S
There is no problem (YES in T78, YES in ST79).

However, the receiving station 30A failed to receive the data (YE in ST72 of FIG. 15) as indicated by the dotted line in FIG.
S), that is, the next scheduled transmission date and time (199)
Since data could not be received by 9/11 / 01-12: 45) (YES in ST76, ST77,
The non-delivery information indicating that the data (D) could not be received is transmitted as shown in FIG. 17 using another communication means (the ground line 39) (ST80 in FIG. 16). ).

Thus, the transmitting station (10) receives the undelivered information from the receiving station 30A (YE in ST49 of FIG. 10).
If S (YES in ST50), the storage control means (CPU
11, ROM 12) is the non-delivery table 13M shown in FIG.
The ST (30A) and the date and time (1999/1
(1 / 01-12: 45) is stored (ST51). Note that ST52 is another process.

When the transmitting station (10) issues a retransmission request (YES in ST53 of FIG. 11), retransmission control means (CPU11, ROM12, CPU21, ROM
22) refers to the non-delivery table 13MST and the date / time data table (13NJT) (ST54, ST5).
5) Then, the date and time (1999/11 / 01-12: 4)
Data (D) corresponding to 5) is extracted (ST55), and the data is retransmitted to the non-delivery station (30A) using the ground line 39 (other communication means) as a backup line, that is, backup transmission (ST56). I do.

Since the undelivered station (30A) has thus become a delivered station, it is erased from the undelivered table 13MST (ST57). Undelivered table 13 MST
Is executed for all the receiving station sides (30) stored in.

In the second embodiment, the transmitting station (1
0, 20), for example, at 11:00, the data with a header (for example, D11) to which the set next scheduled transmission date and time (for example, 12:00) is added to each receiving station side (30). (YE of ST40 in FIG. 9)
S to ST45).

Each receiving station side (30) receives, via the communication satellite 50, the data with header (D11) to which the next scheduled transmission date and time (12:00) is added (ST in FIG. 15).
70), the next scheduled transmission date and time (12: 0)
0) is stored in the scheduled date and time memory (33NJM). Data is stored.

Next, the next scheduled transmission date / time (12:00) stored in the scheduled date / time memory (33NJM) is monitored, and the date / time (eg, 12:00) corresponding to the next scheduled transmission date / time (12:00) is monitored. It is determined whether or not the data with the header (D12) to which the next scheduled transmission date and time (for example, 13:00) is added by 12:05) (FIG. 1).
(YES at ST76 of ST6 to ST79).

Then, the next scheduled transmission date and time (13:00)
Is added to the header-attached data (D12) with the date and time (for example, 12:00 to 00) corresponding to the next scheduled transmission date and time (12:00) stored in the scheduled date and time memory (33NJM).
If it is determined that reception has not been completed by 12:05) (YES in ST78, NO in ST79), the non-delivery information is transmitted to the transmitting station (10) using another communication means (ground line 39) (ST80). ).

That is, only the receiving station (30A), which could not receive the next data managed at the next scheduled transmission date and time, reports to the transmitting station (10) via another communication means (38). Undelivered information). Most of the receiving stations (30
B, ...) are omitted. That is, with respect to such a response, the load on other communication means can be significantly reduced.

Since the undelivered information is generated at each scheduled transmission date and time, the transmitting station side does not add, for example, a serial number or the like for identifying the undelivered object to the undelivered information. There is no problem even if it is transmitted to (10).

Therefore, each receiving station (30) can detect in real time that data has not been delivered at the time corresponding to the next scheduled transmission date and time, and the communication satellite 5
Between the receiving station side (30) and the transmitting station side (10) while avoiding the report concentration of the other communication means (39) that does not pass through 0 and greatly reducing the amount and time of the transmitted / received data. Information about the result of data transmission / reception via the communication satellite 50 can be quickly and accurately transmitted / received using other communication means (39). Moreover, the transmitting station side (20) to the receiving station side (30)
If the data can be transmitted only once at the first time, even if, for example, the antenna 38A of the receiving station side (30) falls down due to strong wind, unlike the case of the first embodiment (sequential code transmission method), With the help of another communication means (39) (backup transmission of data), the receiving station side (30) can know that data has not been delivered at each scheduled transmission date and time.

(Third Embodiment) The third embodiment has the same basic configuration as that of the first embodiment (FIG. 1), but differs from the first embodiment. Is formed to transmit a serial code from the transmitting station side (10, 20) to each receiving station side (30) and to make each receiving station side (30) perform self-diagnosis to detect retroactive data loss. In the second embodiment, the transmitting station side (10, 20) to each receiving station side (30)
The next transmission scheduled date and time is transmitted to each receiving station side (30) and self-managed by the receiving station (30) so that the presence or absence of data loss can be detected in real time at each scheduled time. Both the number code and the next scheduled transmission date and time are transmitted to each receiving station side (30), and each receiving station side (30) is formed to be capable of self-diagnosis and self-management.

That is, the third embodiment is different from FIG.
As shown in FIG. 26, the next transmission scheduled date and time set by the transmitting station (10, 20) and data with a header to which a different serial number (N) is added for each data are transmitted to each receiving station (3, 20).
0) via the communication satellite 50 so as to be transmittable, and each receiving station side (30) adds a different serial number code to the next scheduled transmission date and time and data set via the communication satellite 50. When the data with the header is received, the next scheduled transmission date and time can be stored in the scheduled date and time memory 33NJM, and the serial number can be stored in the code memory 33FM, and the serial number previously stored in the code memory 33FM. It is possible to determine whether there is a missing serial number code older than the code received this time, and if it is determined that there is a missing serial number code, the transmitting station transmits the undelivered information added with the missing serial number code. It is formed so as to be able to transmit to the side (10) using another communication means (39), and each receiving station side (30) corresponds to the next scheduled transmission date and time stored in the scheduled date and time memory (33NJM). By the time, it is possible to determine whether or not the data with the header to which the next scheduled transmission date and time has been added via the communication satellite 50, and the data with the header to which the next scheduled transmission date and time has been added is stored in the scheduled date and time memory (33NJM). If it is determined that the data could not be received by the date and time corresponding to the stored next scheduled transmission date and time, the next scheduled transmission date and time or the undelivered information added with the serial number code is transmitted to the transmitting station (1).
0) using another communication means (39).

Further, in the third embodiment, the transmitting station side (10, 20) receives the header with the data omitted and the set next scheduled transmission date and time and with a different serial number added for each data. The receiving station side (30) is formed so as to be able to transmit to the station side (30) via the communication satellite 50, and the receiving station side (30) omits the data and adds a different serial number to each set next scheduled transmission date and time and data. When the received header is received, the next scheduled transmission date and time is stored in the scheduled date and time memory (33N
JM) and the serial number is stored in the code memory 33F.
M and can be stored before the code memory 3
It is possible to determine whether or not there is a missing serial number older than the one received this time among the serial numbers stored in the 3FM, and if it is determined that there is a missing serial number, the missing serial number is replaced with the missing serial number. The added undelivered information is formed so as to be transmittable to the transmitting station (10) by using another communication means (39), and each receiving station (10) is stored in the scheduled date and time memory (33NJM). By the date and time corresponding to the scheduled transmission date and time, it is possible to determine whether the data with the header to which the next scheduled transmission date and time is added (or the header where the data is omitted and the next scheduled transmission date and time is added) has been received. At the same time, data with a header to which the next transmission scheduled date and time is added (or a header with the data omitted and the next transmission scheduled date and time added) is stored in the scheduled date and time memory (33NJM). If it is determined that the data could not be received by the date and time corresponding to the fixed date and time, the next scheduled transmission date and time or the undelivered information added with the serial number code is transmitted to the transmitting station (10) using another communication means (39). It is formed so that transmission is possible.

Here, if there is a transmission request (YES in ST90 of FIG. 18), the transmitting station side (10, 20) refers to the scheduled transmission date and time table (13SYNT) (ST91),
Transmission date and time (for example, 1999/11 / 01-12: 0)
0) (YES in ST92), read the next scheduled transmission date and time (1999/11 / 01-12: 45) (ST93), update the sequence number N (serial number code) (ST94), and FIG. 22 shows a data message with a header shown in FIG. 21 to which a number N (serial number code, for example, “00001”) and the next scheduled transmission date and time (for example, 1999/11 / 01-12: 45) are added. As shown, transmission is performed via the communication satellite 50 (ST96).

Note that the scheduled transmission date and time table (13SYN
The next scheduled transmission date and time stored in (T) is entered by key input (YE in ST109 in FIG. 20) as in the second embodiment.
S (YES in ST110), update (ST11)
1) Yes. The next scheduled transmission date and time of a plurality of stages may be set and stored in advance, and the system may be configured to be automatically updated.

The sequence number N (serial number code: "00"
001 ") and the next scheduled transmission date and time (Nov.
The data with the header shown in FIG. 21 to which "01-12: 45" is added is stored in the N-by-N data table 13NT shown in FIG. 1 (ST97).

If only the header is selected (YES in ST95), data (D) in the data message shown in FIG. 21 is omitted, and the serial number code and the next scheduled transmission date and time are added. Only the header is transmitted via the communication satellite 50 (ST98). Also in this case, the data non-sequential number code is stored in the N-by-N data table 13NT (S
T99). Since the serial number (N) is added to the message, the date / time data table (13) of the second embodiment is used.
It does not matter if it is not NJT).

This is received (YE in ST120 of FIG. 24).
The receiving station side (30) that performed S) temporarily stores the data (ST12).
1) and determine whether the data message is complete. If it is incomplete or cannot receive all,
The reception has failed (YES in ST122).

If the data message is complete (NO in ST122), the storage control means (CPU 31, ROM 32) stores the data (D) with the serial number (N = “00001”) in the code memory 33FM (ST124). I do. The data may be configured to be stored in a special memory. If the data is omitted (YES in ST123), the serial number code (N =
Only “00001”) is stored in the code memory 33FM (S
T125).

If the data message is complete (ST1)
22; NO), storage control means (CPU 31, ROM 3
2) is the scheduled transmission date and time (1999/11 / 01-1)
2:45) The attached data (D) is stored in the scheduled date and time memory (33NJ).
M) (ST124). When data is omitted (S
Similarly, the scheduled date and time memory (33NJ)
M) (ST125).

Thereafter, the transmitting station side (transmitting station 20)
As shown in FIG. 23, the next scheduled transmission date and time (1999/11
/ 01-12: 45), the sequence number (N =
“00002”) and the next scheduled transmission date and time (1999 /
11 / 01-14: 00) is transmitted via the communication satellite 50 (ST96 in FIG. 18).

On the other hand, the receiving station side (receiving station 30
B) is capable of receiving the data and has a scheduled date and time memory (3
3NJM) (ST124 in FIG. 24). However, the receiving station side (the receiving station 30A) fails to receive as indicated by the dotted line in FIG. 23 (YES in ST122 of FIG. 24).
It is. The next scheduled transmission date and time (1999)
/ 11 / 01-14: 00) cannot be stored in the scheduled date and time memory (33NJM).

That is, in the receiving station 30B, the data could be received at the next scheduled transmission date and time (1999/11 / 01-12: 45) stored in the scheduled date and time memory (33NJM) (ST128 in FIG. 25). YES, ST12
9, ST130 YES, ST131 YES), no problem.

However, as shown by the dotted line in FIG. 23, the receiving station 30A fails to receive (YE in ST122 in FIG. 24).
S), that is, the next scheduled transmission date and time (199)
Since data (D) could not be received by 9/11 / 01-12: 45) (YES in S128 in FIG. 25, S
T129, ST130 YES, ST131 NO),
The non-delivery information indicating that the data (D) could not be received is transmitted using another communication means (the land line 39) as shown in FIG. 26 (ST132 in FIG. 25).

Thus, the transmitting station (10) receives the undelivered information from the receiving station 30A (Y in ST100 of FIG. 19).
If ES and ST101 are YES), the storage control means (C
PU11, ROM12) is the non-delivery table 1 shown in FIG.
The device (30A) and the sequence number ("00002") are stored in the 3MST (ST102). In addition,
ST103 is other processing.

When the transmitting station (10) makes a retransmission request (YES in ST104 of FIG. 20), retransmission control means (CPU 11, ROM 12, CPU 21, RO)
M22) refers to the non-delivery table 13MST and the N-by-N data table 13NT (ST105, ST106).
And the date and time (1999/11 / 01-12: 45)
That is, data (D) corresponding to the sequence number N (= "00002") is extracted (ST106), and the undelivered station (30A) is transmitted to the undelivered station (30A) by using the terrestrial line 39 (other communication means) as a backup line. The data is retransmitted, that is, backup transmitted (ST107).

Since the undelivered station (30A) has thus become a delivered station, its storage is deleted from the undelivered table 13MST (ST108). Undelivered table 13M
The process is executed for all the receiving stations (30) stored in the ST.

Further, 1999/11 / 01-12: 4
5, the sequence number N (serial number code “00003”) and the next scheduled transmission date and time (for example, 1999/11 / 01-14: 00) are added from the transmitting station side (20) as shown in FIG. A data message with a header is transmitted via a communication satellite 50 as shown in FIG. 22 (ST9).
6) Consider a case where the receiving station side (30B) is normal and the receiving station side (30A) is above.

That is, in the receiving station 30B, the sequence number N is serially stored in the code memory 33FM (“0000”).
1 "," 00002 ", and" 00003 "), there is no problem, but the receiving station 30A
Has a reception failure (YES in ST122 of FIG. 24) as represented by a dotted line in FIG.
It is assumed that the sequence number (N = “00002”) is missing (YES in ST126 of FIG. 24).

Then, the receiving station 30A transmits the undelivered information indicating that the data (D) of the sequence number (“00002”) could not be received to another receiving means (the land line 39) as shown in FIG. It transmits as shown (ST127).

The transmitting station side (10) receives the undelivered information from the receiving station 30A (YES in ST100 of FIG. 19, ST
If YES in step 101, the storage control means (CPU 11,
The ROM 12) stores the device (30A) and the sequence number N (“0000”) in the non-delivery table 13MST shown in FIG.
2 ") is stored (ST102). ST103 is other processing.

Therefore, even if the real-time schedule management is unsuccessful, data transmission can be detected retrospectively by serial number code management.
The predetermined data can be quickly and reliably delivered to all of the receiving station sides (30) while eliminating the congestion of 9).

In the third embodiment, the transmitting station side (1
0, 20) is, for example, data with a header (eg, 12:00) to which a different serial number (N1) for each data (D1) and a preset next scheduled transmission date and time (eg, 12:45) are added. , N1 with D1) on each receiving station side (30)
Via the communication satellite 50 (ST9 in FIG. 18).
6).

Each receiving station side (30) sets the next scheduled transmission date and time (12:45) and the header-attached data (N1 with D1 with different serial number (N1 = “00001)) added to each data. ) Is received via the communication satellite 50 (YES in ST120 of FIG. 24), the next scheduled transmission date / time (12:45) is stored in the scheduled date / time memory (33NJ).
M) and stores the serial number (N1) in the code memory 3
It is stored in the 3FM (ST124). Data is stored.

Each receiving station side (30) transmits the next scheduled transmission date and time (1) stored in the scheduled date and time memory (33NJM).
2:45), and the data with header (D2) to which the next scheduled transmission date and time (for example, 14:00) is added by the date and time (for example, 12:45 to 12:50) corresponding to the next scheduled transmission date and time. ) Is determined via communication satellite 50 (YES to ST 128 in FIG. 25).
131).

The data with header (D2) to which the scheduled transmission date / time (14:00) is added is stored in the scheduled date / time memory (33N).
JM), the next scheduled transmission date and time (12: 4
When it is determined that reception was not possible by the date and time (12:45 to 12:50) corresponding to 5) (NO in ST131)
The unsent information with the next scheduled transmission date and time (14:00) or the serial number (N2) added to the transmission station side (1
0) using another communication means (39) (ST1).
32).

On the other hand, it is determined whether or not there is a missing serial number (N2) older than that received this time among serial numbers (eg, N1 and N3) stored in the code memory 33FM before that. (ST126 in FIG. 24). When it is determined that there is a missing serial number code (N2) (Y in ST126)
ES), the non-delivery information added with the missing serial number code (N2) is transmitted to the transmitting station side (10) using another communication means (39) (ST127).

In other words, only the receiving station (30A) that could not receive the next data managed at the next scheduled transmission date and time is reported to the transmitting station (10) via another communication means (39) (not yet transmitted). Delivery information). Most of the receiving stations (30
B, ...) are omitted. Also, on the transmitting station side (1
0), only the receiving station side (30A) that has self-diagnosed that there was data that could not be received previously among the data managed by the serial number code, via the other communication means (ground line 39). Undelivered information). Reports from the majority of receiving stations (30B,...) In which serial numbers are not missing are omitted. That is, with respect to such a response, the load on the other communication means (39) can be significantly reduced.

Accordingly, each receiving station (30) can detect in real time that data has not been delivered at the time corresponding to the next scheduled transmission date and time. Moreover, if data can be delivered only once from the transmitting station side (20) to the receiving station side (30), even if the antenna 38A of the receiving station side (30) later falls due to strong wind, for example, With the help of the other communication means (39), the station side (30) can know that data has not been delivered at each scheduled transmission date and time. Further, each receiving station side (30A, 30B,...) Can retroactively detect that data has not been delivered, and can avoid concentration of reports by other communication means (39) not via the communication satellite 50. Means for transmitting and receiving data between each receiving station side (30) and the transmitting station side (20) and via the communication satellite 50, while significantly reducing the amount and time of transmitted / received data. Transmission and reception using (39) can be performed quickly and accurately.

Also, since the amount of data of the header from the transmitting station side (20) to each receiving station side (30) via the communication satellite 50 is small, the transmission time can be greatly reduced, and the transmitting station side ( Since the undelivered information from each receiving station side (30) can be quickly collected in 10), the usability of, for example, transmitting only the header before data transmission and consulting the communication state via the communication satellite 50 is enhanced. It can be executed frequently because it can be performed in a short time.

In the third embodiment, an example has been described in which a real-time non-delivery check based on the next scheduled transmission date and time and a retrospective non-delivery check using a serial code are applied to the same or different data. It is understood that, for the same data, the next scheduled transmission date and time management is prioritized, and the serial number code management is often performed as a backup.

[0150]

According to the first aspect of the present invention, the transmitting station is formed so as to be able to transmit header-attached data added with a different serial number to each data to each receiving station via a communication satellite,
When each receiving station receives data with a header to which a serial number code has been added, the serial number code can be stored in the code memory, and if there is a missing serial number code older than the one received this time in the serial number code. Since the data transmission / reception system via a communication satellite formed to be able to transmit the undelivered information to which the missing serial number code is added to the transmitting station using the other communication means when determined, the other communication means This can significantly reduce the load on the system. Therefore, each receiving station side can detect retroactively that data has not been delivered, and can avoid the concentration of reports of other communication means that do not pass through a communication satellite to greatly reduce the amount and time of transmitted / received data. While shortening the transmission and reception of information on the result of data transmission and reception between each receiving station and the transmitting station and via a communication satellite using other communication means can be performed quickly and accurately.

Further, according to the invention of claim 2, according to claim 1,
A header in which data is omitted and a serial number code is added as compared with the case of the invention of the third aspect is formed so as to be transmittable to each receiving station side via a communication satellite, and has the same function as the invention of the first aspect. Therefore, in addition to providing the same effect as in the case of the first aspect of the present invention, the data amount of the header transmission from the transmitting station to each receiving station via the communication satellite can be reduced. The transmission time can be greatly reduced because of the small number, and the undelivered information from each receiving station can be quickly collected by the transmitting station. Since the usability such as consulting the communication state which has been improved is improved and the communication can be performed in a short time, it can be frequently executed.

According to the third aspect of the present invention, data with a header to which the next scheduled transmission date and time set by the transmitting station is added can be transmitted to each receiving station via a communication satellite. When the receiving station receives the data with the header to which the next scheduled transmission date and time is added, the next scheduled transmission date and time can be stored in the scheduled date and time memory, and the next scheduled transmission date and time is added by the date and time corresponding to the next scheduled transmission date and time. Since it is a data transmission / reception system via a communication satellite formed so as to be able to transmit the undelivered information to the transmitting station side by using other communication means when it is determined that the data with header cannot be received,
This means that the load on other communication means can be significantly reduced. Therefore, each receiving station side can detect that data has not been delivered at the time corresponding to the next scheduled transmission date and time, and can avoid the concentration of reports of other communication means that do not go through a communication satellite, thereby reducing the amount and time of transmitted / received data. Can be quickly and accurately transmitted and received between each receiving station side and the transmitting station side, and information on the result of data transmission / reception via the communication satellite using other communication means. In addition, if data can be transmitted only once from the transmitting station to the receiving station for the first time, even if the antenna of the receiving station falls down due to strong wind, the receiving station can help other communication means ( By borrowing (data backup transmission), it is possible to know that data has not been delivered at each scheduled transmission date and time.

Further, according to the invention of claim 4, according to claim 3,
A header in which data is omitted and the next scheduled transmission date and time are added as compared with the case of the invention of the third aspect is formed so that it can be transmitted to each receiving station side via a communication satellite. Claim 3 because it is formed to function.
In addition to having the same effect as in the case of the invention of the present invention, the transmission time can be greatly reduced because the data amount of header transmission from the transmitting station side to each receiving station side via the communication satellite is small. In addition, since the transmitting station can quickly collect the undelivered information from each receiving station side, the usability of, for example, transmitting only the header before transmitting each data to check the communication state via the communication satellite is increased. In addition, since short-time communication is sufficient, it can be executed frequently.

According to the fifth aspect of the present invention, the next scheduled transmission date and time is added to the undelivered information transmitted from each receiving station to the transmitting station using another communication means.
In addition to the effects similar to those of the inventions of the third and fourth aspects, the transmitting station side can grasp the undelivered station and use another means for transmitting the data to the undelivered station. Backup transmission can be performed more reliably.

Further, according to the invention of claim 6, the next transmission scheduled date / time set by the transmitting station and the data with the header to which the serial number code is added can be transmitted to each receiving station via the communication satellite. When each receiving station receives the data with a header to which the next scheduled transmission date and time and the serial number code are added, the next scheduled transmission date and time can be stored in the scheduled date and time memory and the serial number code can be stored in the code memory. When it is determined that there is a missing serial number code older than the one received this time in the serial number code, the undelivered information added with the missing serial number code is transmitted to the transmitting station using another communication means. If it is determined that the data with the header with the next scheduled transmission date and time added by the date and time corresponding to the next scheduled transmission date and time cannot be received, the next scheduled transmission date and time or the Since the undelivered information added to turn the code is a data transmission and reception system via the communications satellite that is transmittable formed using other communication means to the transmitting station,
Data transmission / reception results between each receiving station and transmitting station and via communication satellites, while avoiding report concentration of other communication means that do not go through communication satellites and greatly reducing the amount and time of transmitted / received data It is possible to quickly and accurately transmit and receive the information about other communication means. In addition, each receiving station can detect in real time that data has not been delivered at the time corresponding to the next scheduled transmission date and time. Furthermore, if data can be transmitted only once from the transmitting station to the receiving station for the first time, even if the antenna of the receiving station falls down due to a strong wind, the receiving station can help other communication means. If borrowed, it is possible to know that data has not been delivered at each scheduled transmission date and time. Further, since each receiving station side can retroactively detect that data has not been delivered using the serial number code, the reliability is high.

Furthermore, according to the invention of claim 7, compared to the case of the invention of claim 6, the header in which the data is omitted and the serial number code and the next scheduled transmission date and time are added to each receiving station side. Since it is formed so as to be able to transmit via a communication satellite and functions in the same manner as in the sixth aspect of the invention, it is possible to provide the same effects as in the sixth aspect of the invention. In addition, since the amount of data for header transmission from the transmitting station to each receiving station via a communication satellite is small, the transmission time can be significantly reduced, and the untransmitted information from each receiving station at the transmitting station can be reduced. Can be collected quickly, so that, for example, only the header is transmitted before data transmission to check the communication state via the communication satellite, and the like, and the operation can be performed frequently because the time is short and the time is short.

[Brief description of the drawings]

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

FIG. 2 is a flowchart (1) for explaining the operation of the transmitting station.

FIG. 3 is a flowchart (2) for explaining the operation of the transmitting station.

FIG. 4 is a view for explaining a data message with a header to which a serial number is added.

FIG. 5 is a diagram for explaining a transmission operation (1) of a data message with a header to which a serial number is added.

FIG. 6 is a diagram for explaining a transmission operation (2) of a data message with a header to which a serial number code is added.

FIG. 7 is a flowchart for explaining the operation of the receiving station.

FIG. 8 is a diagram for explaining a transmission operation of non-delivery confirmation information to which a serial number is added.

FIG. 9 is a flowchart (1) illustrating an operation on the transmitting station side according to the second embodiment of the present invention.

FIG. 10 is a flowchart (2) for explaining the operation of the transmitting station.

FIG. 11 is a flowchart (3) for explaining the operation of the transmitting station.

FIG. 12 is also a diagram for explaining a data message with a header to which a next scheduled transmission date and time are added.

FIG. 13 is a diagram for explaining a transmission operation (1) of a data message with a header to which a scheduled transmission date and time is added next;

FIG. 14 is a diagram for explaining a transmission operation (2) of a data message with a header to which a scheduled transmission date and time is added next;

FIG. 15 is a flowchart (1) for explaining the operation of the receiving station.

FIG. 16 is also a flowchart (2) for explaining the operation on the receiving station side.

FIG. 17 is also a diagram for explaining an operation of transmitting non-delivery confirmation information.

FIG. 18 is a flowchart (1) for describing an operation on the transmitting station side according to the third embodiment of the present invention.

FIG. 19 is also a flowchart (2) for explaining the operation on the transmitting station side.

FIG. 20 is also a flowchart (3) for explaining the operation on the transmitting station side;

FIG. 21 is a view for explaining a data message with a header to which a serial number code and a scheduled transmission date and time are added.

FIG. 22 is a diagram for explaining a transmission operation (1) of a data message with a header to which a serial number code and a next scheduled transmission date and time are added.

FIG. 23 is a view for explaining a transmission operation (2) of a data message with a header to which a serial number code and a next scheduled transmission date and time are added.

FIG. 24 is a flowchart (1) for explaining the operation of the receiving station.

FIG. 25 is also a flowchart (2) for explaining the operation on the receiving station side.

FIG. 26 is a diagram for explaining the operation of transmitting the non-delivery confirmation information.

FIG. 27 is a schematic diagram for explaining a conventional example.

FIG. 28 is also a flowchart (1) for explaining the conventional operation on the transmitting station side.

FIG. 29 is also a flowchart (2) for explaining a conventional operation on the transmitting station side.

FIG. 30 is a flowchart for explaining a conventional operation on the receiving station side.

[Explanation of symbols]

 Reference Signs List 10 Main unit (transmitting station side) 11 CPU 12 ROM 13 RAM 13NT N N data table 13MST Undelivered table 14 Keyboard 15 Display 19 Wired line 20 Transmitting station side device (transmitting station side) 30 Receiving station (receiving station side) 31 CPU 32 ROM 33 RAM 33 FM Code memory 34 Keyboard 35 Display 39 Ground line (other communication means) 40 Terminal 49 Network 50 Communication satellite N Sequence number (serial number code) D data

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) 5K030 HA05 HB12 HB15 HC01 JL02 KA04 KA08 LA02 LD02 LD12 LD18 MA04 MB13 5K033 AA06 BA13 CB03 CB13 DA06 DA18 DB12 EA07 5K034 AA06 EE03 MM03 MM18 BB25 CC03 CC05 CC31 DD01 DD16 DD17 EE05 EE24 FF10 FF24 GG01

Claims (7)

[Claims] 1. A method of causing a receiving station to receive data transmitted from a transmitting station and passing through a communication satellite, and performing another communication between each receiving station and the transmitting station without passing through the communication satellite. In a data transmission / reception system via a communication satellite formed so as to be able to transmit / receive information on a data transmission / reception result using a means, the transmitting station side transmits the data with a header to which a different serial number is added for each data. When each of the receiving stations receives, via the communication satellite, the data with the header to which a serial number is added, the data is transmitted to each of the receiving stations via the communication satellite. The number code can be stored in the code memory, and it is possible to determine whether or not any of the serial numbers stored earlier in the code memory is older than the one received this time and is missing. Data transmission / reception via a communication satellite formed to be able to transmit the undelivered information added with the missing serial number code to the transmitting station side by using the other communication means when it is determined that there is a serial number code system. 2. The transmitting station is configured to be able to transmit the header with the data omitted and the serial number added thereto to each of the receiving stations via the communication satellite. When the data is omitted via the communication satellite and the header to which the serial number is added is received, the serial number is formed so as to be able to be stored in the code memory, and the data is omitted. After receiving the header to which the serial number code is added, it is possible to determine whether any of the serial number codes stored in the code memory before that includes a missing serial number code that is older than that received this time. ,
2. The communication according to claim 1, wherein when it is determined that there is a missing serial number code, the undelivered information added with the missing serial number code can be transmitted to the transmitting station using the other communication means. Data transmission / reception system via satellite. 3. Receiving data transmitted from a transmitting station side and passing through a communication satellite to each receiving station side, and performing another communication between each receiving station side and the transmitting station side and not via the communication satellite side. In a data transmission / reception system via a communication satellite formed so as to be able to transmit / receive information on a data transmission / reception result using a unit, the transmitting station side transmits the data with a header to which a set next scheduled transmission date and time is added to each of the data. When each of the receiving stations receives the data with the header to which the next scheduled transmission date and time is added via the communication satellite, the data is transmitted to the receiving station via the communication satellite. The scheduled transmission date / time can be stored in the scheduled date / time memory, and the next scheduled transmission date / time is added before the date / time corresponding to the next scheduled transmission date / time stored in the scheduled date / time memory. It is possible to determine whether or not the data with the attached date can be received and determine that the data with the header to which the next scheduled transmission date and time is added could not be received by the date and time corresponding to the next scheduled transmission date and time stored in the scheduled date and time memory A data transmission / reception system via a communication satellite formed so as to be able to transmit the undelivered information to the transmitting station side by using the other communication means. 4. The transmitting station is configured to be able to transmit the header with the data omitted and the next scheduled transmission date and time to the receiving stations via the communication satellite, When the station side receives the header to which the data is omitted and the next scheduled transmission date and time is added, the next scheduled transmission date and time can be stored in the scheduled date and time memory, and the next transmission date and time stored in the scheduled date and time memory are stored. By the date and time corresponding to the scheduled transmission date and time, it is possible to determine whether the data with the header to which the next scheduled transmission date and time is added or the data is omitted and the header with the next scheduled transmission date and time added can be received and The data with the header to which the next transmission scheduled date and time is added or the header to which the data is omitted and the next transmission scheduled date and time are added are recorded as the scheduled date and time. 4. The non-delivery information is transmitted to the transmitting station side by using the other communication means when it is determined that the information cannot be received by the date and time corresponding to the next scheduled transmission date and time stored in the transmission station. A data transmission / reception system via the communication satellite described. 5. The non-delivery information transmitted from each of the receiving stations to the transmitting station using the other communication means, the date and time of the next transmission scheduled being added. A data transmission / reception system via the communication satellite described. 6. A method for causing each receiving station to receive data transmitted from a transmitting station and passing through a communication satellite, and performing another communication between each receiving station and the transmitting station without passing through the communication satellite. In a data transmission / reception system via a communication satellite formed so as to be able to transmit / receive information on a data transmission / reception result using a means, the transmitting station side has a set next scheduled transmission date / time and a different serial number added to each data. The data with the header is formed so as to be transmittable to each of the receiving stations via the communication satellite, and each of the receiving stations transmits the next scheduled transmission date and time and each of the data set via the communication satellite. When the data with a header with a different serial number added to the data is received, the next scheduled transmission date and time can be stored in the scheduled date and time memory and the serial number can be stored in the code memory. And it is possible to determine whether or not there is a missing serial number older than the one received this time among the serial numbers stored in the code memory before that, and it is determined that there is a missing serial number. In this case, the non-delivery information added with the missing serial number code is formed so as to be transmittable to the transmitting station using the other communication means. Further, each of the receiving stations is configured to transmit the next transmission stored in the scheduled date and time memory. It is possible to determine whether or not the data with the header to which the next scheduled transmission date and time is added by the date and time corresponding to the scheduled date and time via the communication satellite can be determined, and the data with the header to which the next scheduled transmission date and time are added. If it is determined that reception was not possible by the date and time corresponding to the next scheduled transmission date and time stored in the scheduled date and time memory, the next scheduled transmission date and time or the undelivered information added with the serial number code was added. Data transmission and reception system via the communications satellite that is transmittable formed by using the other communication means to the signal station. 7. The transmitting station sends a header to which the data is omitted and the set next scheduled transmission date and time and a different serial number is added to each data to each of the receiving stations via the communication satellite. When each of the receiving stations receives a header with the data omitted and a set next scheduled transmission date and time and a header with a different serial number added to each data, the next scheduled transmission date and time Can be stored in the scheduled date and time memory and the serial number code can be stored in the code memory, and the serial number code stored earlier in the code memory has a missing serial number code older than that received this time. When it is determined that there is a missing serial number code and it is determined that there is a missing serial number code, the undelivered information added with the missing serial number code can be transmitted to the transmitting station using the other communication means. Further, each receiving station side, the data or the data with a header with the next scheduled transmission date and time added by the date and time corresponding to the next scheduled transmission date and time stored in the scheduled date and time memory is omitted and the It is possible to determine whether or not the header with the next scheduled transmission date and time has been received, and the data with the header with the next scheduled transmission date and time or the data is omitted and the next scheduled transmission date and time is added. If it is determined that the header has not been received by the date and time corresponding to the next scheduled transmission date and time stored in the scheduled date and time memory, the next transmission scheduled date and time or the undelivered information added with the serial number code is transmitted to the transmitting station. 7. The data transmission / reception system via a communication satellite according to claim 6, wherein the data transmission / reception system is formed so as to be able to transmit to the side using the other communication means.