JP4187083B2 - Individual information transmission method, and transmitter and receiver used in the individual information transmission method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a television transmission system, and in particular, to provide a transmission system for individual information (for example, individual information (EMM) or an EMM individual message) to a reception apparatus in a limited reception system and a control system for the reception apparatus. The present invention relates to a possible individual information transmission method, and a transmission device and a reception device used for the individual information transmission method.
[0002]
[Prior art]
Conventionally, when broadcasting is performed using a limited reception method, as basic functions of the system, a program information (ECM) including a scramble key (Ks) as a parameter of a method for scrambling a signal and attribute information of each program Related information called EMM and related information called individual information (EMM) consisting of a work key (Kw) that is a key for encrypting and sending this ECM to the receiving device and contract information of each individual, etc. There is a function to do.
[0003]
Here, the ECM is sent to all receiving apparatuses in common, but the EMM is encrypted with a master key (Km) unique to each receiving apparatus and sent individually.
[0004]
Also, it has been put to practical use to send individual messages for each receiving apparatus using this function.
[0005]
These technologies are described in, for example, the standard “BS digital broadcast limited reception system” (ARIB STD-B25) of the Radio Industries Association (ARIB).
[0006]
FIG. 3 shows a configuration example of a conventional transmission system for transmitting individual information.
[0007]
The transmission apparatus 1 repeatedly transmits the individual information (EMM) 10 for each reception apparatus 100 using the limited reception method.
[0008]
The individual information 10 is generated by the individual information generation unit 2 and then multiplexed by the transmission unit 3 into a transport stream (TS) of MPEG-2 Systems and transmitted via various transmission paths.
[0009]
Thus, the conventional individual information 10 is repeatedly transmitted to all the receiving apparatuses during a certain period. Each receiving device 100 can be equipped with an IC card 200 for identifying the receiving device.
[0010]
[Problems to be solved by the invention]
In the case where information (individual information 10 or the like) is individually sent to each receiving device 100, a transmission method that uses radio waves, which is one of the methods for sending the information, is inexpensive.
[0011]
However, such a transmission method cannot be communicated unless all receivers 100 are turned on and tuned, and therefore it is necessary to repeatedly transmit to all receivers 100 for a certain period of time. In addition, it cannot be surely transmitted unless each receiving apparatus 100 is continuously powered on.
[0012]
In general, in the standard of the limited reception system for digital broadcasting, the receiver is provided with an energy saving measure called an energization control system, and is received in order to receive radio waves when updating individual information (EMM). Measures have been taken to reduce the time to energize the device.
[0013]
However, since it is impossible for the sending side to know whether or not the receiving device has received the EMM, regardless of whether or not the receiving device has received the EMM, each receiving device receives each individual message for a certain period of time. It was necessary to send information repeatedly.
[0014]
As a result, the capacity of individual information occupies a considerable proportion of the total transmission capacity, which hinders efficient use of the transmission path.
[0015]
For example, the EMM transmission cycle to the same receiving apparatus is set to 1 hour, and the data is sent continuously for about one month. This is based on the premise that there is always once a month that the broadcast channel is received continuously for about an hour.
[0016]
In the case of this example, even if it is received by the first transmission, it is continuously sent 24 × 30 = 720 times to the receiving device, resulting in a large loss in transmission capacity.
[0017]
Such a situation is particularly problematic in a system with limited data transmission capacity such as terrestrial digital audio broadcasting.
[0018]
As described above, since the individual information (EMM) transmitted using the conventional limited reception method cannot be determined whether the transmitting apparatus on the transmission side has received the individual information, the individual information Whether it has already been received or not, it is necessary to repeatedly transmit each piece of information to all receiving apparatuses for a certain period of time, and as a result, the efficient use of the transmission path has been hindered.
[0019]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an individual information transmission method capable of reducing the number of times individual information is repeatedly transmitted and improving the utilization efficiency of the transmission path, and a transmitting apparatus and a receiver used in the individual information transmission method. To provide an apparatus.
[0020]
[Means for Solving the Problems]
The present invention is an individual information transmission method for transmitting individual information by limited reception broadcasting, and at least individual information including business entity identification information and update information is transmitted from a transmission device to a plurality of reception devices to which an IC card can be attached. And a plurality of receiving devices including a receiving device installed in a mobile body, wherein each receiving device receives the individual information from the transmitting device, and Information processing means for processing the individual information and the information of the IC card by acquiring information stored in the IC card, wherein the information processing means is configured such that the individual information is a predetermined receiving device. Means for determining whether or not the information matches the information of the IC card attached to the card, and if the individual information is determined to match the information of the IC card, the information is included in the individual information Means for comparing the updated information with the information on the IC card and determining whether the updated information is newly updated information not included in the information on the IC card, and the newly updated information, If it is determined, means for generating acquisition confirmation information including identification information of the IC card, and the generated acquisition confirmation information are encrypted using a key unique to the IC card to the transmitting device. And a transmission control means for controlling transmission of the individual information to each receiving device based on an analysis result of the acquisition confirmation information transmitted from each receiving device. Here, the transmission control means decrypts the acquisition confirmation information from each receiving device with a key corresponding to the encryption processing, and the decrypted acquisition confirmation information is stored in a predetermined receiving device. Send from Means for confirming whether or not the received information has already been acquired, and determining the receiving device that has already acquired the individual information, and the individual information for the receiving device that has already acquired the individual information as a result of the determination And a means for controlling to reduce the number of transmissions over a certain period of time.
[0023]
The present invention is used in the individual information transmission method, and constitutes a transmission device by including the sending means and the transmission control means in the individual information transmission method.
[0024]
The present invention is used in the individual information transmission method described above, and constitutes a receiving apparatus by including the information processing means in the individual information transmission method.
[0025]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
(Overview)
First, an outline of the present invention will be described.
[0026]
The present invention relates to a transmission method for repeatedly transmitting individual information to a receiving device in conditional access broadcasting, and control of a transmitting device and a receiving device applied to the transmission method.
[0027]
That is, the receiving device that receives the individual information (hereinafter referred to as individual information) sends back confirmation information that the individual information has been received to the transmitting device that is the sending side using some transmission means, and on the sending side, By controlling the subsequent repeated transmission of individual information to the receiving apparatus based on the confirmation information, the transmission amount of the entire individual information can be suppressed.
[0028]
The present invention is also directed to an in-vehicle receiving device (that is, a receiving device in which a communication path for transmitting information to the transmitting device side is not always connected) as a main application of terrestrial digital audio broadcasting. In such a case, it is necessary to shorten the repetition cycle of information transmission from the relationship with the driving time of the car, and the relationship with the data transmission capacity becomes important.
[0029]
(Concrete example)
Hereinafter, a specific example will be described.
[0030]
An example of the individual information transmission system according to the present invention will be described with reference to FIGS.
[0031]
(System configuration)
FIG. 1 shows a configuration example of an individual information transmission system. The description of the same parts as those in the system of FIG. 3 described above is omitted, and the same reference numerals are given.
[0032]
This system includes a transmitting apparatus 1 that repeatedly transmits individual information 10 and a plurality of receiving apparatuses 100 that return acquisition confirmation information 50 indicating that the transmitted individual information 10 has been acquired.
[0033]
(Sender)
The transmission device 1 includes an individual information generation unit 2 that generates the individual information 10, a transmission unit 3 that performs control to transmit the generated individual information 10, and an aggregation server 4 that totals the acquisition confirmation information 50. Composed.
[0034]
The transmitting unit 3 has a function of transmitting the individual information 10 generated by the individual information generating unit 2 based on the determination result totaled by the totaling server 4. In this case, it has a function of reducing the transmission frequency of the individual information 10 or ending the transmission with respect to the receiving apparatus 100 that has already acquired the individual information 10.
[0035]
The transmission unit 3 is used as an area for performing overall control of the entire apparatus, a control program according to the present invention (see FIG. 2 described later) and data, and performing various arithmetic processes. A storage area (ROM / RAM, etc.) is provided.
[0036]
The tabulation server 4 tabulates the acquisition confirmation information 50 returned from each receiving device 100 and interprets the acquisition confirmation information 50 to determine whether there is an already acquired receiving device 100 that has acquired the individual information 10. It has a function of determining whether or not and transmitting the determination result to the transmission unit 3.
[0037]
(Receiver)
The receiving apparatus 100 includes a receiving unit 101, an acquisition determining unit 102, a generating unit 103, and a confirmation information sending unit 104.
[0038]
The reception unit 101 has a function of receiving the individual information 10 sent from the transmission device 1. The receiving unit 101 is also provided with a storage area for storing a CPU, a control program according to the present invention (see FIG. 2 described later), and the like, like the transmitting unit 3.
[0039]
The acquisition determination unit 102 has a function of comparing the received individual information 10 with identification information and determining whether or not to acquire it in the apparatus.
[0040]
When it is determined that the individual information 10 is acquired, the generation unit 103 has a function of generating acquisition confirmation information 50 indicating that the individual information 10 has been acquired.
[0041]
The confirmation information transmission unit 104 has a function of transmitting the generated acquisition confirmation information 50 from the reception device 100 to the transmission device 1. The acquisition confirmation information 50 is sent to the transmitting apparatus 1 side via the uplink 60 or the like.
[0042]
(System operation)
Next, the operation of this transmission system will be described.
[0043]
Here, an example of transmission control of the individual information 10 using the acquisition confirmation information 50 is shown.
[0044]
When performing broadcast in which the individual information 10 is repeatedly transmitted from the transmission device 1 to each reception device 100 using the limited reception method, each reception device 100 confirms that the reception unit 101 has received the individual information 10. After that, the acquisition determination unit 102 compares the received business entity identification information and update number information of the individual information 10 with the previous one, and determines whether to acquire and process in the apparatus based on the comparison result. When it is determined that the individual information 10 is to be acquired, acquisition confirmation information 50 indicating that the individual information 10 has been acquired is generated by the generation unit 103, and acquisition indicating that the transmission apparatus 1 has received the confirmation information transmission unit 104. Confirmation information 50 is notified.
[0045]
Along with this notification, in the transmitting apparatus 1, the acquisition server 50 collects the acquisition confirmation information 50 from each receiving apparatus 100 and deciphers the contents thereof, thereby acquiring the individual information 10 already acquired. It is determined whether 100 exists.
[0046]
Based on the determination result, whether the individual information 10 generated by the individual information generation unit 2 has the transmission unit 3 reduce the frequency of sending the individual information 10 to the receiving device 100 that has already acquired the individual information 10. Or the transmission is terminated.
[0047]
(Individual information)
Here, the individual information 10 will be described.
[0048]
In an example of a transmission system that performs transmission control of the individual information 10 using the acquisition confirmation information 50, the receiving device 100 that has received the individual information 10 uses the uplink 60 to make sure that the individual information 10 is transmitted to the transmitting device 1 side. The acquisition confirmation information 50 that the information has been acquired is sent out. In order to send back the acquisition confirmation information 50, the individual information 10 transmitted from the transmission device 1 side to the reception device 100 includes information having the following contents, for example. a) Information for identifying that the individual information 10 has been updated in the receiving apparatus 100 b) Information for identifying the return destination of information related to reception confirmation in the receiving apparatus 100 c) Tampering of the acquisition confirmation information 50 On the information transmitting apparatus 1 side for prevention, after confirming that the individual information 10 for the receiving apparatus 100 has been correctly received by the acquisition confirmation information 50, the frequency of repeated transmission of the individual information 10 to the receiving apparatus 100 is lowered. Alternatively, the transmission amount of the entire individual information 10 can be suppressed by terminating the transmission.
[0049]
(Example of processing)
Next, the transmission control processing of this system will be described based on the flowchart of FIG.
[0050]
Each process of transmission of the individual information 10 based on the acquisition confirmation information 50 in the transmission device 1 and reception of the individual information 10 and generation of the acquisition confirmation information 50 in the reception device 100 will be described.
[0051]
First, processing on the transmission device 1 side will be described.
[0052]
In step S1, information (= destination information) required for sending back the acquisition confirmation information 50 in the receiving apparatus 100 is set in a descriptor format, for example, in a variable part (= EMM function information arrangement part) of the individual information 10.
[0053]
In step S2, the individual information 10 including the destination information is repeatedly sent to each receiving device 100.
[0054]
Next, processing on the receiving device 100 side will be described.
[0055]
In step S3, the individual information 10 sent repeatedly is received.
[0056]
In step S4, it is checked whether or not there is information matching the card ID among the individual information 10 received and temporarily stored. If there is a match, the process proceeds to step S5, and if not, the process proceeds to another process.
[0057]
In step S5, the business entity identification information and the update number of the received individual information 10 are temporarily stored in the storage area.
[0058]
In step S6, the update number of the stored individual information is confirmed.
[0059]
In step S7, it is checked whether or not the confirmed update number is updated as compared with the previous one. If updated, the process proceeds to step S8, and if not updated, the process proceeds to another process.
[0060]
In step S8, if updated, the broadcast entity to which the updated information belongs and the update number of the individual information 10 are stored in the receiving apparatus 100.
[0061]
Thereafter, the stored data is transferred to the IC card 200 loaded in the receiving device 100. When the transferred data is correctly decrypted in the IC card 200, the updated information is stored in the IC card 200. Then, the IC card 200 responds to the receiving apparatus 100 that the processing has been normally completed.
[0062]
If normal processing is performed on the IC card 200, acquisition confirmation information 50 is generated in step S9. The acquisition confirmation information 50 includes, for example, a card ID, a charged business entity identification, an update number at that time, and the like.
[0063]
In step S10, for example, with reference to the destination information arranged in the descriptor format in the variable part of the individual information 10, the acquisition confirmation information 50 is sent to the transmitting apparatus 1 side using some uplink 60. In this case, it can also be transmitted after being encrypted with the encryption key of the IC card 200.
[0064]
The processing on the transmission device 1 side will be described again.
[0065]
In step S <b> 11, if the acquisition confirmation information 50 is encrypted on the transmission device 1 side, it is decrypted with the same encryption key as that of the reception device 100.
[0066]
In step S12, after confirming whether or not the decrypted acquisition confirmation information 50 is surely sent from the predetermined receiving apparatus 100, the receiving apparatus that has already acquired the individual information 10 100 distinctions are made.
[0067]
In step S13, the transmission frequency of the individual information 10 to the receiving apparatus 100 that has already acquired the individual information 10 is decreased, or control for terminating the transmission is performed.
[0068]
Transmission control is executed by the processing described above.
[0069]
Further, the following processing may be added.
[0070]
When a communication path is connected to the receiving apparatus 100 in a receiving apparatus 100 in which a communication path for transmitting information to the broadcast transmitting apparatus 1 side is not always connected, for example, a receiving apparatus installed in a moving body such as a car. Then, after the latest information stored in the receiving device 100 is transmitted and confirmed on the transmitting device 1 side, a process of reducing or ending the frequency of repeated transmissions to the receiving device 100 thereafter is executed. be able to.
[0071]
【The invention's effect】
As described above, according to the present invention, on the receiving device side, it is determined whether or not the individual information received from the transmitting device is acquired and processed in the device. On the other hand, on the transmitting device side, it is determined whether or not there is a receiving device that has already acquired the individual information by decoding the acquired confirmation information, and based on the determination result Thus, the transmission control of the individual information is performed with respect to the receiving device that has already acquired the individual information. Therefore, on the transmission device side, based on the acquisition confirmation information returned from the receiving device, the receiving device thereafter By suppressing or terminating transmission of individual information, the number of receivers to which individual information is sent can be reduced as necessary, thereby reducing the number of repeated transmissions of individual information. It becomes possible to suppress the transmission of the entire alternative information, it is possible to improve the utilization efficiency of the transmission path.
[0072]
In addition, according to the present invention, depending on the viewing mode of the receiver, if only the person who has not viewed remains, if the same data transmission rate is used, the transmission cycle of the individual information to the remaining person is shortened, It is possible to obtain an effect that reception is easier.
[0073]
Furthermore, according to the present invention, when fixed reception such as terrestrial digital audio broadcasting and reception by a vehicle-mounted receiving device are mixed, by terminating the repeated transmission of information reliably received by fixed reception, The allocation of transmission capacity for in-vehicle receivers can be relatively increased, and a further effect of ease of reception can be expected.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a configuration example of an individual information transmission system using acquisition confirmation information according to the present invention.
FIG. 2 is a flowchart illustrating a processing example of a transmission system.
FIG. 3 is a block diagram showing a configuration example of a conventional individual information transmission system.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Transmission apparatus 2 Individual information generation part 3 Transmission part 4 Total server 10 Individual information 50 Acquisition confirmation information 60 Uplink 100 Reception apparatus 101 Reception part 102 Acquisition determination part 103 Generation part 104 Confirmation information transmission part 200 IC card

Claims (3)

An individual information transmission method for transmitting individual information by limited reception broadcasting,
Means out feed you sent repeatedly to the individual information, the plurality of receiving devices IC card can be mounted from the transmitting device that includes the updated information to at least business identification information,
Here, the plurality of receiving devices include a fixed receiving device that is fixed and can use the same data transmission rate, and an in-vehicle receiving device that is installed on a moving body,
Information processing means for processing the individual information and the information of the IC card by receiving the individual information from the transmission device and acquiring the information stored in the IC card in each receiving device ,
Here, the information processing means
Means for determining whether or not the individual information matches information of an IC card attached to a predetermined receiving device;
When it is determined that the individual information matches the information on the IC card, the update information included in the individual information is compared with the information on the IC card, and the update information is not included in the information on the IC card. Means for determining whether the information has been updated;
Means for generating acquisition confirmation information including identification information of the IC card when it is determined that the information is newly updated;
Means for transmitting the generated acquisition confirmation information to the transmitter by performing an encryption process using a key unique to the IC card,
Transmission control means for controlling transmission of the individual information to each receiving device based on the analysis result of the acquisition confirmation information transmitted from each receiving device in the transmitting device.
With
Here, the transmission control means is
Whether the acquisition confirmation information from each receiving apparatus is decrypted with a key corresponding to the encryption process, and the decrypted acquisition confirmation information is transmitted from a predetermined receiving apparatus. Means for confirming whether or not to determine a receiving apparatus that has already acquired individual information;
As a result of the determination, when the receiving apparatus that has already acquired the individual information is the fixing receiving apparatus, the number of transmissions of the individual information to the fixing receiving apparatus over a certain period is reduced, and the fixing is performed. And a means for performing control to relatively increase the allocation of transmission capacity to the in-vehicle receiver that can use the same transmission speed as that of the receiver . It is used for the individual information transmission method according to claim 1 ,
In the individual information transmission system, a transmission device comprising the sending means and the transmission control means. It is used for the individual information transmission method according to claim 1,
A receiving apparatus comprising the information processing means in the individual information transmission system.

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