JP2009246703A - Reception device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the following problem: even though the OADL and the net DL are used usually as a means for version upgrading of software, it takes time for data to be received when the size of version upgrading image is large in OADL because the version upgrading image is divided into block units and superposed in data broadcasting for transmission; and the receiving speed by net DL is slower than that of OADL while its transfer rate is not fixed uniformly, and there is a higher risk of line service stop in the middle of download than in OADL. <P>SOLUTION: A control means for switching data to be received in OADL or/and net DL according to the condition is provided. At the same time, data received in OADL or/and net DL in common is managed and OADL or/and net DL data are received simultaneously, thereby eliminating the time and effort for re-receiving data received by one means by the other means. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  As means for receiving software upgrade images, means for receiving OADL or / and net DL data, means for switching data received according to the situation of OADL or / and net DL, and common to OADL and net DL Means for managing the received data identification information and the received block, a temporary storage area for storing the received block or / and the file on the memory, and the module or / and the file for which reception of all the blocks has been completed on the HDD The present invention relates to a device comprising a storage area to be stored above and means for reading and writing data from and to the storage area.

In recent years, along with an increase in the scale of software incorporated in devices, software defects are often found after the product is released. Therefore, it is necessary to upgrade the software at each home. As a means for this, there is a method of writing a version upgrade image on a medium such as a CD or an SD card and performing the version upgrade using the medium. In addition, other means such as OADL (ON AIR DOWNLOAD) and net DL (net download) are used (for example, see Patent Document 1). In the OADL, the upgrade image is divided into modules of a specified size on the transmission side (there may be one module), and further divided into blocks of a specified size for each module. Thereafter, the upgrade image divided into blocks is superimposed on the data broadcast, and the device receives the block to reconstruct the upgrade image. On the other hand, in the net DL, a file obtained by dividing the upgrade image into a specified size is placed on the server, and the upgrade image is reconstructed by accessing and downloading the file via the network. By using these means, it is possible to upgrade the device without using a special medium such as an upgrade CD. In addition, if a system that automatically receives OADL and / or net DL data is incorporated in the receiving device, it is possible to keep the device at the latest version without imposing a burden on the user at every version upgrade. Become.
JP 2006-345303 A

  However, in the case of OADL, there is an upper limit on the data transfer speed from the broadcasting station side for the convenience of transmitting the upgrade image divided into block units superimposed on the data broadcast. Therefore, when the size of the upgrade image is large, it takes a very long time to receive data. On the other hand, in the case of the net DL, the transfer speed is not fixed depending on the connection method to the network, the degree of congestion of the line, and the like. In addition, since data is transferred using a mechanism similar to the Internet, the risk that the line is interrupted during download is higher than that of OADL.

  In view of the above problems, an object of the present invention is to provide a system for receiving a version-up image in a shorter time by simultaneously receiving both OADL and / or net DL data.

  Identification of receiving means for receiving OADL or / and net DL data, control means for switching data of receiving means according to the situation of OADL or / and net DL, and data received by receiving means for both OADL and net DL Block management means for managing information and reception blocks, and when the reception means receives both OADL and net DL data, the control means starts from the file to which the block from which OADL starts reception belongs. The OADL is controlled so that the net DL starts to receive a file in the reverse direction of the carousel.

  Further, when the reception means cancels the reception of data in the net DL in the middle and restarts the reception in the net DL, or starts receiving data in the net DL while receiving data in the OADL, block By referring to the information managed by the management means, the net DL has not acquired the data and the file to which the block that can be received by the OADL belongs at the time when the data reception is resumed, is opposite to the carousel from the OADL. Have the function of selecting the nearest file and restarting reception.

  By simultaneously receiving both OADL and / or net DL data, it is possible to shorten the time until the completion of the upgrade image reception. In addition, even if it becomes difficult to receive either OADL or / and net DL data due to changes in the receiving environment, etc., the reception success rate of the upgrade image is improved by continuing to receive the other data. To do.

  Hereinafter, embodiments of an apparatus for receiving a version-up image according to the present invention will be described with reference to the drawings.

(Embodiment)
FIG. 1 is a configuration diagram of an embodiment of an apparatus for receiving an upgrade image according to the present invention. The control means 10 determines whether or not OADL or / and net DL data can be received. At this time, the OADL determines whether or not a PAT (program association table) and a PMT (program map table) can be received from the stream, and determines whether the net DL can be connected to the server. In addition, when the net DL starts to receive data, by referring to the information managed by the block management means 30, blocks that can be received by OADL at the time when data reception is started, and blocks that have already been received To start receiving from the optimal file.

  Here, when the control means 10 reads information from the block management means 30, it is performed via the means 101.

  The receiving unit 20 receives data determined to be received by the control unit 10. Since the processing for receiving data is different between the OADL and the net DL, the receiving means 20 has a function capable of receiving both the OADL data and the net DL data.

  The block management unit 30 manages the identification information of the data received by the reception unit 20 and the block in common with the OADL and / or the net DL. In the case of the net DL, the unit for receiving data is not a block unit but a file unit as in OADL. When a file is received, it is managed by the block management means 30 as if all the blocks corresponding to the file have been received. Let The received data identification information is checked if it is the same as the last received data when the data reception is canceled in the middle, and when the next data reception is resumed. This is used to start reception from the continuation of data, and uses the manufacturer code, model code, data version, etc. of the receiving device, but any other data can be used as long as the data can be identified.

  By managing the data received in common with OADL and / or net DL using the block management means 30, it is possible to save the trouble of receiving the data received by one means again. Here, since OADL receives blocks superimposed on data broadcasting, it is not possible to arbitrarily select a block to be received every time, but net DL accesses a file existing on the server and downloads data. Since it is structured, for example, it is possible to receive a carousel for one round with OADL, select only the file to which the block that has failed to receive belongs, and receive it with the net DL.

  Note that when the receiving unit 20 reads / writes the received data information from / to the block managing unit 30, it is performed via the unit 102.

  The temporary storage area 40 is an area for temporarily storing received data on a memory, and the storage area 50 is an area for storing received data on an HDD. The data read / write means 60 reads / writes data from / to the storage area 50. Here, since the unit for receiving data is different between the OADL and the net DL, the storage area 50 is used in common, but the temporary storage area 40 is provided separately.

  When data is read / written from / to the temporary storage area 40, the data is read / written via the means 103, and for the storage area 50, the data read / write means 60 is read via the means 104, 105.

  In OADL or / and net DL, compression / encryption may be performed in module or / and file units on the transmission side in order to shorten reception time and enhance security. In the case of the net DL, when one file is received in the temporary storage area 40, the file is decrypted / decompressed and then written in the storage area 50 to access the next file. However, in the case of OADL, since the block superimposed on the data broadcast is received, when decoding / decompression is performed in module units, the data transfer rate may not be in time. Therefore, when a module is received in the temporary storage area 40, it is written in the storage area 50 as it is, and after all modules have been received in the storage area 50, decryption / decompression is performed in the storage area 50.

  Here, since the storage area 50 is an HDD, even if the power of the receiving apparatus is turned off, the written data will not be lost. However, in the temporary storage area 40, when the power of the receiving apparatus is turned off, the written data is lost. Therefore, when the power of the receiving apparatus is turned off, the block management means 30 writes the identification information of the upgraded image flowing in the stream at that time and the information of the received data in the file and is written in the temporary storage area 40. Is written in the storage area 50 together with the data. When data reception is resumed next time, the control means 10 refers to the file created by the block management means 30 when the power was turned off last time from the storage area 50 and compares it with the identification information of the data flowing in the current stream. If they match, the data written in the temporary storage area 40 using the file is written from the storage area 50 to the temporary storage area 40, and the reception information of the block at the previous power-off is again sent to the block management means 30. Let them manage.

  FIG. 2 is a flowchart for receiving OADL data. When data reception is started by OADL, module accumulation is started. If no data acquisition error occurs until all data accumulation is completed, data acquisition is completed at that time. If a data acquisition error occurs before the accumulation of all data is completed, the control means 10 first checks whether data is being acquired on the net DL at that time. If acquisition is in progress, the control means 10 periodically checks whether the OADL data can be received, taking into consideration the possibility of recovery of the OADL data acquisition error while acquiring data on the net DL, and receives the data. When it becomes possible, reception of data is resumed by OADL. If data is not being acquired on the net DL, the data acquisition is terminated as a download failure.

  FIG. 3 is a flowchart for receiving net DL data. When data reception is started on the network DL, file accumulation is started. If no connection error occurs until all data accumulation is completed, the data acquisition is completed at that point. If a connection error occurs before the accumulation of all data is completed, the control means 10 first checks whether data is being acquired by OADL at that time. If the data is being acquired, the controller of the control means 10 periodically checks whether the data of the net DL can be received in consideration of the possibility that the connection error of the net DL will be recovered while acquiring the data with OADL. When reception becomes possible, data reception is resumed on the net DL. If the data is not being acquired by OADL, the acquisition of data is terminated as a download failure.

4, 5, and 6 show the acquisition order of net DL files. With regard to OADL, since the block superimposed on the data broadcast is received, the block acquisition order cannot be determined. Here, modules and files that are not colored are not received, and those that are painted gray are received. 4, 5, and 6, for easy understanding, the OADL module and the net DL file are drawn with the same size, but for the OADL data, the net DL file on the receiving device side is drawn. It is only necessary to perform processing assuming that the same size is divided, and even if there is only one module, there is no problem.
First, as a case where the file acquisition order must be considered, the following can be considered.

(1) When receiving both OADL and net DL data at the same time (2) When starting data reception with only net DL (3) While receiving data with OADL, start receiving data with net DL, In the case of (1), the net DL starts reception from the file to which the block that starts reception by OADL belongs as shown in FIG. 4, and the reverse direction of the carousel is different from OADL, that is, the reception start file number is a Then, after a, the a-1th file is received. Here, with respect to module a (file a), there is a partial overlap of data received by OADL and net DL, but if the block from which OADL starts reception is the b-th block of module a, OADL uses carousel. As long as is not one round, blocks before b cannot be received.
The reception from the file a is also started in the net DL. In addition, the module or / and file can be received from the temporary storage device 40 to the storage device 50. If all the blocks of the module a are received by OADL, the reception of the file a by the network DL is completed. In this case, the block of module a received by OADL may be discarded. If the block b is the first block of the module a, it is possible to receive all the blocks of the module a by OADL without going around the carousel. Start receiving from.

  In the case of (2), when the reception of all data is completed only by the net DL, from which file the reception is started does not affect the time until the reception is completed. However, it is conceivable that the reception of OADL data is started and resumed while the data of net DL is being received. However, since it is not known from which block the reception is started, it is possible to receive data only with net DL. When starting, as shown in FIG. 5, data reception is started from the last file in the direction opposite to the carousel from OADL.

  In the case of (3), the block that can be received by OADL at the start of reception in the net DL as shown in FIG. 6 is block b, the module to which the block b belongs is module a, and the reception of the module a has already been completed. The data c is not acquired and the file c corresponding to the closest module is selected in the reverse direction of the carousel from the module a to the OADL, and reception is started and resumed. If reception of the block prior to block b of module a has not been completed, reception from file a is started as in FIG. 4, and reception is completed in the reverse direction of the carousel from module a to OADL. Select the file corresponding to the module to receive.

  The receiving apparatus according to the present invention can be applied to devices that can receive data broadcasts such as digital televisions and recorders and that can be connected to a network and that require software upgrades.

Embodiment of the present invention Flow chart of data reception by OADL Flow chart of data reception by net DL Diagram showing the file acquisition order when both OADL and net DL data can be received simultaneously Diagram showing the file acquisition order when data reception starts only on the net DL A diagram showing the file acquisition order when data reception is restarted on the net DL and when data reception is started on the net DL during data reception on the OADL

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Control means 20 Receiving means 30 Block management means 40 Temporary storage area 50 Storage area 60 Data read / write means

Claims (4)

An apparatus for receiving a software upgrade image from data broadcasting and a network,
Receiving means for receiving OADL or / and net DL data;
Control means for switching data of the receiving means according to the situation of OADL or / and net DL;
OADL, network DL common data identification information received by the receiving means, and block management means for managing the received block,
When the receiving means receives both OADL and net DL data, the control means starts from the file to which the block where the OADL starts receiving, and the net DL is the reverse of the carousel. A receiving apparatus that controls to start reception. When the reception means cancels the data reception of the net DL in the middle and restarts the reception by the net DL, or when the data reception by the OADL starts to receive the data by the net DL, the block management By referring to the information managed by the means, the net DL has not acquired the data and starts receiving data from the file to which the block that can be received by OADL belongs. The reception apparatus according to claim 1, wherein reception is resumed by selecting the closest file. If it is difficult to acquire data by one of the receiving means of OADL or / and net DL, and the data can be received by the other receiving means, the remaining receiving data is received by the other receiving means. The receiving apparatus according to claim 1, wherein the receiving apparatus is a receiver. When data acquisition by one of the receiving means of OADL and / or net DL becomes difficult on the way, data acquisition by one receiving means is possible again while another data is being received by the other receiving means. The receiving apparatus according to claim 1 or 2, wherein when it becomes possible, the remaining data is received by one receiving means.

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