JP3237617B2 - Delivery method and device for digital communication file - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention multiplexes and arranges file data (abbreviated as a file) as transmission data on a transmission band and a time axis in PCM multiplex transmission of satellite digital broadcasting. The present invention relates to a method and apparatus for distributing a file in digital communication for distributing to a reception target, and in particular, in digital communication in which one file is multiplexed and arranged on a transmission band and a time axis in a vacant band. The present invention relates to a file distribution method and a file distribution device.

[0002]

2. Description of the Related Art Conventionally, in digital communication, for example, a line interface (I / F) unit for accommodating a digital line, a multiplex connection unit, a data terminal, a terminal I / O for accommodating a computer, a PBX, etc. There is known an example configured by an F unit, a control device including a control device, a clock signal supply circuit, and the like. In such a digital communication device, transmission data (file data) from the terminal I / F unit is multiplexed and arranged on a transmission band and a time axis (denoted as file distribution as appropriate) by multiplex connection. Transmitting from digital line to destination.

FIG. 28 is a diagram showing a file distribution state in conventional digital communication, and FIG. 29 is a diagram showing another file distribution state in conventional digital communication. In FIG. 28, this file distribution state shows an example in which files are multiplexed and arranged (file distribution) on the transmission band and the time axis, and the files 1, 2, 3, 4, 5, 6
Are multiplexed on the transmission band (Y) and the time (X). In the transmission band (Y), files (data) 1 to
6 occupies a fixed band. As shown in FIG. 29, at the transmission start time S2, there is one usable band. Here, the new file 7 requires two bands, and the file 7 cannot be multiplexed and arranged at the transmission start time S2.

[0004] As an example corresponding to such an effective use of the free transmission band, there is a conventional example of Japanese Patent Application Laid-Open No. 4-98918, "Digital multiplexing method". Time slots are dynamically allocated for transmission data. Also, JP-A-6-225266
In the conventional example of the publication "Audio-Video Communication Processor System", the bandwidth is dynamically allocated in conformity with the quality constraints of the video and audio data. Further, in the conventional example of Japanese Patent Publication No. Hei 7-73254, "Line Assignment Method", channel assignment is edited and assigned by time division.

[0005]

In the above-described conventional file distribution, for each file, the file is arranged at a unique position on the transmission band and on the time axis. For this reason, every time a new file is added and multiplexed and arranged, it is necessary to perform a troublesome comparison of the multiplexing position with all the files already multiplexed and arranged. That is, the area on the transmission band and the time axis of the file to be newly multiplexed and arranged is detected, and the troublesome area is detected so that the already registered file does not overlap on the transmission band and the time axis. However, there is a disadvantage that a multiplexing arrangement processing operation is required for this.

Further, when files for which multiplexing is requested are sequentially multiplexed and arranged, the positions on the transmission band and the time axis are determined in advance for each file. When executed, there is a problem that vacant areas occur frequently on the transmission band and on the time axis, so that the transmission band cannot be used effectively.

The present invention solves the above-mentioned problems in the prior art. When multiplexing and arranging files on a transmission band and a time axis, the transmission band can be effectively used and the transmission band can be effectively used. In digital communication, it is possible to determine the transmission bandwidth duplication of a file already multiplexed and arranged on the top and the time axis with minimum processing operations, and it is easy to determine the adjustability of the file transmission start time An object of the present invention is to provide a file distribution method and a device therefor.

[0008]

In order to achieve the above-mentioned object, a file distribution method in digital communication according to the present invention is a digital distribution method for multiplexing and arranging a plurality of files on a transmission band and a time axis for transmission. In the file distribution method in communication, obtain information on required bandwidth, transmission start time, and communication time according to the order of file numbers from information on each file distributed within a unit time,
Based on the sequence information consisting of the transmission start time and the bandwidth used, each of the files from the transmission start time to the transmission end time
Determine the available bandwidth in the time zone and
For each time period from the transmission start time to the transmission end time,
Vacant band on the transmission band found by the above-mentioned index
File distribution processing for sequentially multiplexing and arranging files in an area .

A file delivery device in digital communication according to the present invention is a file delivery device in digital communication for multiplexing and arranging a plurality of files on a transmission band and a time axis for transmission. First storage means for storing a band configuration table for storing a multiplexing arrangement state on a transmission band and a time axis;
Second storage means for storing file information for each file delivered within a unit time, and transmission of the file
The time zone from the start time to the transmission end time, and this time zone
The third that stores the array information indicating the used bandwidth for
Based on information from the storage means and the file information and the sequence information , each file is transferred to the file.
For each time zone from the transmission start time to the transmission end time,
And file distribution processing means for executing a process of sequentially multiplexing and arranging them on the transmission band of the band configuration table .

The bandwidth configuration table includes information on time and transmission bandwidth, wherein the time is the transmission start time and communication time of each file, and the transmission bandwidth indicates the bandwidth required by each file. This bandwidth is configured to be the transmission capacity assigned to each file within a unit time.

Further, the file information is configured as a file number, a required band, a transmission start time, a communication time, a transmission start time coordinate, an end time coordinate, a start point band coordinate, and an end point band coordinate.

Further, the file number is an identification number assigned to each file in the order in which the file distribution request is received, the required bandwidth is a bandwidth required by each file, and a transmission start time. Is the time to start transmission of each file, the communication time is the time required for communication of each file, and the transmission start time coordinate is the multiplexing arrangement in the band configuration table of the transmission start time of each file. The end time coordinate is the position in the band configuration table of the end time of each file, and the start point band coordinate is the position of the multiplexing arrangement in the band configuration table of the band start point used by each file. The end point band coordinates are used as the position of the multiplexing arrangement in the band configuration table of the band end point used by each file. .

Further, in the file information, the used bandwidth is a used bandwidth corresponding to a time zone from a transmission start time to a transmission end time .

Further, the first, second and third storage means may include at least a line interface unit, a multiplex connection unit,
This is a memory in a multiplex connection unit in a digital communication system including a terminal interface unit and a control device, and the file distribution processing means is configured to be a multiplex connection unit and a control device.

Further, the file distribution device in the digital communication is configured to be applied to a satellite digital broadcasting system.

The file distribution method and apparatus for digital communication according to the invention having such a configuration obtains information in accordance with the order of file numbers from information for each file distributed within a unit time. Then, an available bandwidth at the transmission start time of the file is determined based on the information on the transmission start time and the used bandwidth, and the files are sequentially multiplexed and arranged in the free transmission bandwidth on the transmission bandwidth and the time axis.

Therefore, when files are sequentially distributed, the files are multiplexed and arranged in vacant bands without occupying each unique band. As a result, the vacant area when multiplexing the files on the transmission band and the time axis is reduced, and the limited transmission band can be effectively used.

In the multiplexing arrangement of a new file, the file is multiplexed and arranged in an empty area (band) after the transmission start time is determined. As a result, it is possible to determine the transmission band overlap of the multiplexed and arranged files on the transmission band and the time axis with a minimum processing operation.

Furthermore, since it is possible to determine the transmission band overlap of the multiplexed file on the transmission band and on the time axis with a minimum processing operation, it is easy to adjust the transmission start time of the file. Be able to judge.

Further, when this file distribution is applied to satellite digital broadcasting, more bands can be used, and effective program organization can be achieved.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a file distribution method and apparatus for digital communication according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a digital communication file distribution system according to an embodiment of the present invention. This file distribution system includes a line interface (I / F) unit 1 for accommodating a digital line.
Multiplex connection unit 2, data terminal 3, computer 4
And a terminal I / F unit 6 accommodating the PBX 5 and the like, and a control device 7 including a control circuit, a clock signal supply circuit, and the like.

The file distribution system includes a data terminal 3 through a terminal I / F unit 6 by processing of multiplex arrangement on a transmission band and a time axis in a multiplex connection unit 2 and control of a control unit 7. The transmission data (file data) of the computer 4 and the PBX 5 are multiplexed and arranged (file distribution) on the transmission band and the time axis, and are transmitted to the digital line through the terminal I / F unit 6.

Next, the operation of the file distribution processing in this embodiment will be described. FIG. 2 is a diagram for explaining a file distribution function, and FIG. 3 is a diagram for explaining a band configuration table. 2 and 3, the band configuration table A is stored, for example, in a memory (not shown) provided in the multiplex connection unit 2 in FIG. The band configuration table A indicates a time schedule of each file when performing multiplex transmission by using two-dimensional coordinates, and includes a time axis X and a transmission band Y. The time axis X indicates the transmission start time and the communication time of each file. The transmission band Y indicates a bandwidth required by each file. This band is the transmission capacity allocated to a specific file within a unit time. Therefore, it is impossible to multiplex and arrange a plurality of files in the same band within a certain unit time.

The file information B shown in FIG.
The file information B is detailed information of each file distributed within a certain unit time. The file information B includes a file number N, a required band H, a transmission start time S, a communication time T, a transmission start time coordinate SX, an end time coordinate EX, a start point band coordinate SY, and an end point band coordinate EY. Here, the file number N is an identification number assigned to each file in the order in which the file distribution request was received, and the required bandwidth H indicates the bandwidth required by each file. The transmission start time S indicates the transmission start time of each file.

Further, the communication time T indicates the communication time of each file, and the transmission start time coordinate SX indicates the position of the multiplex arrangement in the band configuration table A of the transmission start time of each file. Further, the end time coordinate EX indicates the position of the multiplexing arrangement in the band configuration table A of the end time of each file, and the start point band coordinate SY indicates the multiplexing arrangement in the band configuration table A of the band start point used by each file. Indicates the position. The end point band coordinates EY indicate the position of the multiplexing arrangement in the band configuration table A of the band end point used by each file.

The arrangement information C in FIG. 2 is stored, for example, in a memory (not shown) provided in the multiplex connection unit 2 in FIG. Consists of The transmission start time S indicates the transmission start time of each file, and the used bandwidth U indicates the used bandwidth with respect to the transmission start time S.

The file distribution processing D in FIG.
The file distribution processing D is a control processing by the CPU provided in the multiplex connection unit 2 of FIG.
Then, a process of acquiring file information from the array information C and multiplexing and delivering the file on the transmission band and the time axis is executed. As a result of this distribution processing, the multiplexing arrangement of each file is stored in the band configuration table A. This file distribution processing D is performed by using the band information used result in the file information B.
Then, a process of updating the array information C is performed.

FIG. 4 is a diagram for explaining file information B, and FIG. 5 is a diagram for explaining array information C.
The bandwidth configuration table A shown in FIG. 3 obtains information on the required bandwidth H, the transmission start time S, and the communication time T from the file information B in FIG. . In this case, the sequence information C shown in FIG.
Using the bandwidth U at the transmission start time S of the file
And files are sequentially multiplexed and arranged in the vacant transmission band Y. Here, the time axis X of the band configuration table A
Is in the range of 0 to 24, and the transmission band Y is in the range of 0 to 9.

Next, the first file distribution processing D will be described. FIG. 6 is a diagram for explaining the band configuration table A on which the first file distribution process D has been performed, and FIG. 7 is a diagram for explaining file information B on which the first file distribution process D has been performed. . FIG. 8 is a diagram for explaining the array information C that has been subjected to the first file distribution processing D.

In the band configuration table A, from the file information B,
The information of the value (1) of the required bandwidth H, the value (0) of the transmission start time S, and the value (12) of the communication time T of the file number 1 are obtained, and the file distribution processing D for the file number 1 is executed. This file is multiplexed and arranged on the transmission band and the time axis. In this case, the value (0) of the used band U in the time (0 to 11) from the start to the end of the file is obtained using the array information C, and the vacant transmission band Y (0 to 0) is obtained.
In 1), files are multiplexed and arranged.

After this processing, the time in the sequence information C
The value of the used band U corresponding to the band (0 to 11) is the value of the used bandwidth, and is (1). Similarly, the value of the band coordinate (SY, EY) corresponding to the value (0, 12) of the time coordinate (SX, EX) of the file information B is (0, 1). The result of the multiplexing arrangement by the first file distribution processing D is the band configuration table A shown in FIG. 6, the file information B shown in FIG. 7, and the array information C shown in FIG. It is.

Next, the second file distribution processing D will be described. FIG. 9 is a diagram for explaining the band configuration table A in which the second file distribution processing D has been performed, and FIG.
It is a figure for explaining file information B which performed the file distribution processing D of the 2nd. FIG. 11 is a diagram for explaining the array information C that has been subjected to the second file distribution processing D.

In the band configuration table A, from the file information B,
The information of the value (3) of the required band H, the value (0) of the transmission start time S, and the value (2) of the communication time T of the file number 2 are obtained, and the file distribution processing D for the file number 2 is executed. This file is multiplexed and arranged on the transmission band and the time axis. In this case, using the array information C, the used bandwidth U in the time (0 to 1) from the start to the end of the file
Of the transmission band Y (0-4)
Multiplex files.

After this processing, the value of the used band U corresponding to the time zone (0 to 1) in the array information C becomes the value of the used bandwidth, and becomes (4). Similarly, the value of the band coordinate (SY, EY) corresponding to the value (0, 2) of the time coordinate (SX, EX) of the file information B is (0, 4). The result of performing the multiplexing arrangement by the second file distribution processing D is the band configuration table A shown in FIG.
And the array information C shown in FIG.

Next, the third file distribution processing D will be described. FIG. 12 is a diagram for explaining the band configuration table A on which the third file distribution process D has been performed, and FIG. 13 is a diagram for explaining file information B on which the third file distribution process D has been performed. . FIG. 14 is a diagram for explaining the array information C that has been subjected to the third file distribution processing D. In the bandwidth configuration table A, from the file information B, information of the required bandwidth H of the file number 3 (1), the value of the transmission start time S (4), and the value of the communication time T (12) are obtained,
The file distribution process D for the file number 3 is executed.

In this case, using the array information C, the used bandwidth U in the time (0 to 1) from the start to the end of the file
Is obtained (1), but according to the file information B, the time
For the bands (4 to 11), the second band is used because the used band U is (1). However, in the present invention, since the file is distributed with the transmission band shifted, the file is multiplexed to the transmission band Y (0 to 1) in the time period (12 to 15) when the first band is unused. Deploy. After this processing, the time zone (4-1 to 1) in the sequence information C
The value of the used bandwidth U corresponding to 1) becomes the value of the used bandwidth, and becomes (2).

The value of the used band U corresponding to the time zone (12 to 15) is (1) because it is the used bandwidth. Similarly, time coordinates (SX, EX) of file information B
The value of the band coordinates (SY, EY) corresponding to the value (4, 12) is (1, 2). Time coordinates (SX, EX)
Coordinates (SY, EY) corresponding to the values (12, 16)
Is (0, 1). The result of performing the multiplexing arrangement by the third file distribution processing D is the band configuration table A shown in FIG. 12, and the file information B shown in FIG.
And the array information C shown in FIG.

Next, the fourth file distribution processing D is the same as described above. FIG. 15 is a diagram for explaining the band configuration table A in which the fourth file distribution processing D has been performed.
Is the file information B that performed the fourth file distribution processing D
FIG. FIG. 17 is a diagram for explaining the array information C that has been subjected to the fourth file distribution processing D.

Next, the fifth file distribution processing D is the same as described above. FIG. 18 is a diagram for explaining the band configuration table A in which the fifth file distribution processing D has been performed.
Is the file information B that has performed the fifth file distribution processing D
FIG. FIG. 20 is a diagram for explaining the array information C obtained by performing the fifth file distribution processing D.

Next, the sixth file distribution processing D is the same as described above. FIG. 21 is a diagram for explaining the band configuration table A in which the sixth file distribution processing D has been performed.
Is the file information B that performed the sixth file distribution processing D
FIG. FIG. 23 is a diagram for explaining the array information C obtained by performing the sixth file distribution processing D.

Next, the seventh file distribution processing D will be described. FIG. 24 is a diagram for explaining the band configuration table A in which the seventh file distribution process D has been performed, and FIG. 25 is a diagram for explaining file information B in which the seventh file distribution process D has been performed. . FIG. 26 is a diagram for explaining the array information C that has been subjected to the seventh file distribution process D. In the bandwidth configuration table A, from the file information B, the information of the value (2) of the required bandwidth H, the value (2) of the transmission start time S, and the value (6) of the communication time T of the file number 7 are obtained. The file distribution process D for the number 7 is executed.

In this case, the used band U is
Is determined by the file information B.Time zone
Regarding (2-3), since the used band U is (2),
Files are multiplexed and arranged in transmission bands (2-4). Ma
WasTime zoneRegarding (4), the used band U is (6).
Multiplex files in the transmission band (6-8)
I do. Regarding (5) of the transmission start time S,
Since the band U is (5), the transmission band (5-7)
Files are multiplexed. Also,Time zone(6-7)
Then, since the used band U is (43), the transmission band
The files are multiplexed and arranged in (4 to 6).

The value of the used bandwidth U in the array information C after this processing is updated to the value of the used bandwidth every transmission start time S. Similarly, the value of the time coordinate (SX, EX) of the file information B and the corresponding band coordinate (S
Y, EY) is also updated. The result of performing the seventh file distribution process D is the band configuration table A shown in FIG. 24, the file information B shown in FIG. 25, and the array information C shown in FIG.

FIG. 27 is a diagram showing the contents of the band configuration table A in which the multiplexing arrangement has been completed. By dividing the transmission bandwidth for one file as shown in the bandwidth configuration table A and adding the required bandwidth to the free transmission bandwidth per unit time, the duplication judgment of the already registered files is minimized. In addition, useless free space in the band configuration is reduced.

[0045]

As is clear from the above description, according to the file distribution method and apparatus for digital communication of the present invention, when files are sequentially distributed, each file does not occupy its own band and becomes free. Are multiplexed and arranged in the band. As a result, the vacant area when sequentially multiplexing the files on the transmission band and the time axis is reduced, and the limited transmission band can be effectively used.

In the multiplexing arrangement of a new file, the file is multiplexed and arranged in an empty area (band) after the transmission start time is determined. Therefore, the multiplexing on the transmission band and the time axis is performed. It is possible to determine the transmission bandwidth duplication of the already placed files with a minimum processing operation.

Further, since it is possible to determine the transmission band overlap of the multiplexed file on the transmission band and the time axis with a minimum processing operation, it is possible to determine the possibility of adjusting the transmission start time of the file. You will be able to do it easily.

Further, when this file distribution is applied to satellite digital broadcasting, more bands can be used, and effective program organization can be achieved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a digital communication file distribution system according to an embodiment of the present invention.

FIG. 2 is a block diagram for explaining a file distribution function in the embodiment.

FIG. 3 is an explanatory diagram of a band configuration table in the embodiment.

FIG. 4 is an explanatory diagram of file information in the embodiment.

FIG. 5 is an explanatory diagram of array information in the embodiment.

FIG. 6 is an explanatory diagram of a band configuration table in a file distribution process according to the embodiment.

FIG. 7 is an explanatory diagram of file information in a file distribution process according to the embodiment.

FIG. 8 is an explanatory diagram of array information in a file distribution process according to the embodiment.

FIG. 9 is an explanatory diagram of a band configuration table in another file distribution process in the embodiment.

FIG. 10 is an explanatory diagram of file information in another file distribution process in the embodiment.

FIG. 11 is an explanatory diagram of array information in another file distribution process in the embodiment.

FIG. 12 is an explanatory diagram of a band configuration table in another file distribution process in the embodiment.

FIG. 13 is an explanatory diagram of file information in another file distribution process in the embodiment.

FIG. 14 is an explanatory diagram of array information in another file distribution process in the embodiment.

FIG. 15 is an explanatory diagram of a band configuration table in another file distribution process according to the embodiment.

FIG. 16 is an explanatory diagram of file information in another file distribution process in the embodiment.

FIG. 17 is an explanatory diagram of array information in another file distribution process in the embodiment.

FIG. 18 is an explanatory diagram of a band configuration table in another file distribution process in the embodiment.

FIG. 19 is an explanatory diagram of file information in another file distribution process in the embodiment.

FIG. 20 is an explanatory diagram of array information in another file distribution process in the embodiment.

FIG. 21 is an explanatory diagram of a band configuration table in another file distribution process in the embodiment.

FIG. 22 is an explanatory diagram of file information in another file distribution process in the embodiment.

FIG. 23 is an explanatory diagram of array information in another file distribution process according to the embodiment.

FIG. 24 is an explanatory diagram of a band configuration table in another file distribution process in the embodiment.

FIG. 25 is an explanatory diagram of file information in another file distribution process in the embodiment.

FIG. 26 is an explanatory diagram of array information in another file distribution process in the embodiment.

FIG. 27 is a diagram illustrating the contents of a band configuration table in which multiplexing arrangement has been completed in the embodiment.

FIG. 28 is a diagram showing a file distribution state in conventional digital communication.

FIG. 29 is a diagram showing another file distribution state in conventional digital communication.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Line interface part 2 Multiplexing connection part 3 Data terminal 4 Computer 5 PBX 6 Terminal interface part 7 Control device A Band structure table B File information C Sequence information D File distribution processing

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04L 12/58 H04L 12/56 G06F 13/00

Claims (8)

(57) [Claims] 1. A file distribution method in digital communication for multiplexing and arranging a plurality of files on a transmission band and a time axis and transmitting the multiplexed files, wherein a file number is determined from information of each file distributed within a unit time. Obtain information on the required bandwidth, transmission start time, and communication time according to the order, and then, based on the array information consisting of the transmission start time and used bandwidth, from the file transmission start time to the transmission end time.
The available bandwidth in each time zone is calculated, and each time from the file transmission start time to the transmission end time
For the band, a vacancy on the transmission band found by the above-mentioned index
A file distribution method in digital communication, comprising performing a file distribution process of sequentially multiplexing and arranging files in a band in which the file is transmitted. 2. A file distribution apparatus in digital communication for multiplexing and arranging a plurality of files on a transmission band and a time axis and transmitting the multiplexed files on a transmission band and a time axis of each file to be transmitted. First storage means for storing a band configuration table for storing a multiplexed arrangement state, second storage means for storing file information for each file distributed within a unit time, and transmission end from the transmission start time of the file Time zone until time
And array information indicating the used bandwidth for this time zone
A third storage means for storing, based on information from the file information and sequence information,
For each file , specify the transmission start time of that file.
For each time zone from the transmission to the transmission end time,
File distribution processing means for performing a process of sequentially multiplexing and arranging the data on the transmission band shown in the table . 3. The bandwidth configuration table includes time and transmission bandwidth information, where time is the transmission start time and communication time of each file, and the transmission bandwidth is the bandwidth required by each file. 3. The file delivery device according to claim 2, wherein the bandwidth is a transmission capacity allocated to each file within a unit time. 4. The file information according to claim 2, wherein the file information includes a file number, a required band, a transmission start time, a communication time, a transmission start time coordinate, an end time coordinate, a start point band coordinate, and an end point band coordinate. File distribution device in digital communication. 5. The file number according to claim 4, wherein the file number is an identification number assigned to each file in the order in which the file distribution request is received, and the required bandwidth is a bandwidth required by each file. Yes, the transmission start time is the time to start transmission of each file, the communication time is the time required for communication of each file, and the transmission start time coordinate is the band configuration of the transmission start time of each file The end time coordinate is the position of the end time of each file in the band configuration table, and the start point band coordinate is the multiplexing in the band configuration table of the band start point used by each file. The end point band coordinates are the position of the multiplexing arrangement in the band configuration table of the band end point used by each file. File delivery device in a digital communication, characterized in that. 6. In the file information, the used bandwidth is a time from a transmission start time to a transmission end time.
File delivery apparatus in a digital communication according to claim 2, characterized in that the spent bandwidth for the band. 7. The first, second and third embodiments according to claim 2.
The storage unit is a memory in the multiplex connection unit in the digital communication system including at least a line interface unit, a multiplex connection unit, a terminal interface unit, and a control device, and the file distribution processing unit is the multiplex connection unit and the control device. A file distribution device in digital communication, characterized in that: 8. A file distribution device for digital communication according to claim 2, wherein the file distribution device for digital communication is applied to a digital satellite broadcasting system.