JP2008263348A - Mobile terminal with broadcast receiving function, and method for controlling ic card access by mobile terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mobile terminal with a broadcast receiving function, and a method for controlling IC card access by the mobile terminal, such that when the mobile terminal having a communication function and the broadcast receiving function access an IC card provided with a storage area for a master key for scramble broadcast decoding, as well as, subscriber information and an area for decoding processing on a scramble key, a collision of data at an IC card interface can be avoided. <P>SOLUTION: An access monitor unit 108 of the mobile terminal monitors a buffer a106 storing data from a communication function unit 101 and a buffer b107 storing data from a broadcast receiving function unit 102, and controls a buffer, from which data is transferred to the IC card I/F 105 in accordance with the priority. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a technique for controlling access to an IC card mounted on a portable terminal having a broadcast receiving function.

  In recent years, mobile terminals equipped with a communication function include a voice call function, a data communication function, which are original functions, a function for taking a still image or a movie with a camera, a music data playback function, a game function, a schedule. Various products having many functions such as a management function and an electronic settlement function equipped with an IC chip for using electronic money have been developed.

  In addition, a mobile terminal equipped with a TV tuner as one of the additional functions and having a function of allowing TV video to be viewed on the screen and speaker of the mobile terminal using a TV broadcast video viewing application has been developed.

Some of the television broadcasts received by these portable terminals are currently being broadcast by several means such as terrestrial broadcasts and satellite broadcasts.
In particular, in digital television broadcasting using satellites, the broadcast signal is scrambled and encrypted on the broadcast side, and the reception side can only view it if it is an authorized subscriber with a scramble key for decoding. Generally, a limited reception method is adopted. In Japan, ARIB STD-B25 (access control system in digital broadcasting) is defined as a standard for this limited reception system.

  In this standard, an encryption method, handling of a scramble key, and the like are defined, and the so-called B-CAS (BS Conditional Access System) method is called. In this standard, a master key for decoding a scramble key is stored in advance in an IC card called a B-CAS card. This IC card is inserted into a digital tuner, and when the scrambled broadcast is decoded, the scramble key is read out using the master key inside the IC card, and the scramble key is delivered to the broadcast receiver for descrambling.

  By the way, in actual operation, this scramble key is changed in units of several seconds on the broadcast station side in order to prevent unauthorized viewing by a person who is not an official subscriber. That is, the reading of the scramble key is continuously repeated every few seconds by the IC card.

  On the other hand, in a mobile terminal, particularly a GSM (Global System for Mobile Communications) mobile phone and a third generation (3G, 3rd Generation) mobile phone, which are standard in digital mobile phones, an IC for recording subscriber information By inserting the card into the mobile terminal body, the mobile phone functions as a mobile phone.

  This IC card is called a SIM (Subscriber Identity Module) or USIM (Universal Subscriber Identity Module) card, and has a phone book and SMS (Short Message Service) function in addition to mobile phone subscriber information. ing. By inserting this IC card into the portable terminal, a plurality of portable terminals can be used with the same contractor number. That is, it is the IC card itself that manages and specifies the subscriber information, not the mobile terminal body.

  Here, in the case of a portable terminal having the above-described television broadcast receiving function, it is reasonable to integrate the B-CAS card and the IC card when it is assumed to cope with scrambled broadcasting. Providing a mechanism for newly inserting a B-CAS card is not practical because it involves changing the hardware of the terminal and increases the size. When registering a subscriber to scrambled broadcasting, the user's effort can be reduced and the user can be easily promoted by using the cellular phone subscriber information stored in the IC card.

  Furthermore, the mobile terminal ID using the SAT (SIM Application Talkit) and USAT (USIM Application Talkit) functions defined by the 3GPP (3rd Generation Partnership Project) specification, which is the standard of the third generation mobile communication system. IC card that stores a master key for decoding a scramble key from a server through a communication network and stores subscriber information of each user by means of an OTA (Over The Air) rewrite function that enables writing and erasing (SIM, USIM) can also be downloaded inside.

  However, considering the case where the IC card is simply provided with a B-CAS master key storage area and a scramble key read function, there arises an access collision problem with access related to the conventional communication function. it is conceivable that.

The access related to the conventional communication function is an access for authentication with a carrier communication network, an access for saving or reading in a telephone directory or SMS, or a regular period for monitoring the presence of an IC card. There is access.
On the other hand, as to the reading of the B-CAS scramble key, as described above, there is access every few seconds because the key is changed every few seconds. Furthermore, IC card access is half-duplex communication, and transmission and reception are performed alternately, and the next processing is performed after one set of transmission / reception access processing is completed. Can not do it.
Since the communication function and the broadcast receiving function are functions that are essentially unrelated, there is a possibility that access related to the conventional communication function and reading of the scramble key may collide.

As a method for solving the problem of multiple processing of an IC card, a technique for performing multiple processing by task scheduling inside the IC card is disclosed (for example, see Patent Document 1).
JP 2006-127361 A

  However, in the technology of Patent Document 1, assuming a broadcast receiving terminal that stores a master key in an IC card and considering receiving a scrambled digital TV broadcast, as described above, it prevents unauthorized analysis. Therefore, since the scramble key is updated in a few seconds, the access frequency to the IC card interface is high only by the task scheduling process inside the IC card, and the access related to the conventional communication function and the reading of the scramble key are performed. Access is likely to be simultaneous timing access. That is, there is a possibility that a collision occurs when data arrives at the IC card interface.

  Furthermore, IC cards called SIM and USIM cards, which are generally used in GSM mobile phones or third generation mobile phones, employ half duplex communication. In this case, the method of processing by the task scheduling inside the IC card of Patent Document 1 does not solve the problem, and it is highly likely that reading of the scramble key will fail due to access collision, and the decoding process of the scramble broadcast cannot be performed. For this reason, the TV image is disturbed, and viewing is hindered.

  Also, if access related to the communication function collides with access due to reading of the scramble key, for example, access for authentication cannot be performed, and it takes time to connect to the carrier network, or the presence of the IC card is confirmed. It is not possible to do this, and it may be determined that the card has been removed during use and a malfunction may occur, such as a terminal reset.

  The present invention is to solve the above problems, and a mobile terminal having a communication function and a broadcast receiving function decrypts a scrambled broadcast decoding master key storage area and a scramble key together with subscriber information. By providing a mobile terminal having a broadcast receiving function capable of avoiding data collision at the IC card interface when accessing an IC card provided with a region, and an IC card access control method by the mobile terminal is there.

In view of such circumstances, the portable terminal having the broadcast receiving function according to the first invention is a portable terminal having a communication function and a broadcast receiving function,
First temporary storage means for temporarily storing data regarding the communication function, second temporary storage means for temporarily storing data regarding the broadcast receiving function, and the first and second temporary storages An IC card interface for outputting data to an IC card attached to the portable terminal, and an access monitoring means for monitoring the first and second temporary storage means, wherein the access monitoring means comprises the IC card The temporary storage means for outputting data to the interface is controlled.

  Further, in the portable terminal having a broadcast receiving function according to the second invention, the communication function includes a subscriber information authentication process, and the broadcast reception function includes a scrambled broadcast decoding process, The IC card stores the subscriber information and a master key for the decoding process.

  According to a third aspect of the present invention, there is provided a portable terminal having a broadcast receiving function, comprising an input processing section, wherein the priority of the temporary storage means is set from the input processing section to the access monitoring means.

  According to a fourth aspect of the present invention, there is provided a portable terminal having a broadcast receiving function, wherein the IC card interface multiplexes data commands stored in the first and second temporary storage means, The data of the second temporary storage means are combined and output to the IC card.

  According to a fifth aspect of the present invention, in the portable terminal having the broadcast receiving function, the IC card interface performs demultiplexing of the response of the data input from the IC card, and the first temporary storage means and the first The data is separated and output to two temporary storage means.

  According to a sixth aspect of the present invention, there is provided a portable terminal having a broadcast receiving function, wherein when the IC card interface multiplexes the command, the command having a higher priority is multiplexed first. To do.

  According to a seventh aspect of the present invention, a portable terminal having a broadcast receiving function includes a broadcast viewing function monitoring unit that monitors whether or not the broadcast receiving function is operating, and the broadcast viewing function monitoring unit includes the broadcast viewing function. When the reception function is activated, priority is given to the output of the data in the second temporary storage means to the IC card interface.

  According to an eighth aspect of the present invention, there is provided a portable terminal having a broadcast receiving function, comprising a broadcast viewing function monitoring unit that monitors whether or not the broadcast receiving function is operating, and the IC card interface includes the broadcast receiving function. Is operated, the command of the data stored in the first and second temporary storage means is multiplexed, the data of the first and second temporary storage means are combined, and the IC Output to a card.

  According to a ninth aspect of the present invention, there is provided a portable terminal having a broadcast receiving function, wherein when the IC card interface multiplexes a command, the command for the broadcast receiving function is multiplexed first. And

According to a tenth aspect of the present invention, there is provided an IC card access control method by a portable terminal, wherein a portable terminal having a communication function and a broadcast receiving function acquires data from an IC card attached to the portable terminal, thereby An IC card access control method by a portable terminal that operates a broadcast receiving function,
The portable terminal storing data on the communication function or the broadcast receiving function in the first or second temporary storage means, and monitoring the data storage of the first and second temporary storage means; And a step of controlling the temporary storage means for outputting data to the IC card interface.

  According to an eleventh aspect of the present invention, there is provided an IC card access control method by a portable terminal, wherein the portable terminal multiplexes data commands stored in the first and second temporary storage means at the IC card interface. And the data of the first and second temporary storage means are combined and output to the IC card.

  An IC card access control method by a portable terminal according to a twelfth aspect is characterized in that when the portable terminal multiplexes the command, the command having a higher priority is multiplexed first. .

  According to a thirteenth aspect of the present invention, there is provided an IC card access control method for a portable terminal, wherein the portable terminal monitors whether or not the broadcast receiving function is activated, and when the broadcast receiving function is activated. Priority is given to the output of the data in the second temporary storage means to the IC card interface.

  According to a fourteenth aspect of the present invention, there is provided an IC card access control method by a portable terminal, wherein the portable terminal monitors whether or not the broadcast receiving function is activated, and when the broadcast receiving function is activated. The IC card interface multiplexes the commands of the data stored in the first and second temporary storage means, and synthesizes the data in the first and second temporary storage means to form the IC card. It is characterized by being output to.

  An IC card access control method by a portable terminal according to a fifteenth aspect of the invention is characterized in that when the portable terminal multiplexes the command, the command for the broadcast receiving function is multiplexed first. And

  According to the present invention, separate buffers are provided in front of the IC card interface for access related to the communication function, for example, access for authentication of subscriber information and access for acquiring a scramble key related to the broadcast reception function. The access monitoring unit monitors the states of both buffers and processes one of the buffers first, thereby preventing an access collision and enabling both the communication function and the broadcast receiving function without any trouble.

  In addition, the access monitoring unit is provided with a means for setting which of the buffer for access related to the communication function and the buffer for access related to the broadcast reception function should be prioritized so that the terminal user can receive the broadcast. When priority is given to the function, it is possible to select and selectively use the case where priority is given to the communication function.

  If the access monitoring unit determines that data exists in both the buffer for access related to the communication function and the buffer for access related to the broadcast reception function, the data command is multiplexed (concatenated). , Handing over to the IC card through the IC card interface, and further separating the multiplexed response from the IC card and sending each request to each requester through each buffer, almost simultaneously without prioritizing one of the processes It becomes possible to process.

  In addition, the IC card interface arranges the access whose priority is set above by the access monitoring unit at the head of the multiplexed command and delivers it to the IC card, so that the data arranged first in the IC card is transferred. Prioritize processing and place it at the beginning of the response, or if the other processing takes time, send the processed response first to speed up access or processing that you want to prioritize. The access time for the access person can be shortened.

  In addition, a television viewing function monitoring unit is provided, and the access monitoring unit monitors the buffer only when the television broadcasting function is operating, so that the access monitoring unit does not need to constantly monitor the buffer. In the invention, power saving can be realized. On the other hand, since the power consumption of the portable terminal is small and the power consumption is increased by using the TV viewing function, a configuration that saves power is useful.

  In addition, when the television viewing function monitoring unit is provided and the television broadcasting function is operating, the television broadcasting viewing can be performed without any trouble by automatically giving priority to the access for reading the scramble key.

  In addition, when a TV viewing function monitoring unit is provided and the TV broadcasting function is operating and there are simultaneous access related to the communication function and access related to the broadcast receiving function, the data command is automatically multiplexed. By processing, it becomes possible to use the communication function, the broadcast receiving function, and both functions at the same time without causing problems.

  In addition, when a TV viewing function monitoring unit is provided and the TV broadcasting function is activated, when there is simultaneous access related to the communication function and access related to the broadcast receiving function, the scramble related to the broadcast receiving function is automatically performed. By placing a key read command at the beginning of multiplexing and preferentially processing it inside the IC card, it is possible to view television broadcasts without any obstacles.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a schematic configuration diagram of means for performing IC card access control of a portable terminal according to the present invention in the present embodiment.
The communication function unit 101, the broadcast reception function unit 102, and the IC card access control unit 103 illustrated in FIG. 1 are constituent elements of a mobile terminal having a broadcast reception function.

  The communication function unit 101 performs wireless communication such as voice communication or data communication with a base station (not shown) of a mobile phone communication network according to a predetermined communication method.

  The broadcast receiving function unit 102 has a digital TV broadcast tuner function, and obtains a scramble key from an IC card, thereby decoding the scrambled broadcast signal and enabling viewing of the scrambled TV broadcast.

  The IC card 104 stores subscriber information necessary for communication between the mobile terminal and the communication network, and generally functions as a SIM or USIM card in a GSM mobile phone or a third generation mobile phone. In addition, in the present invention, the IC card stores a user-specific master key used in the conditional access system (CAS), and the following related information multiplexed on the digital television broadcast wave, that is, individual information It is assumed that it also has a function of decoding a scramble key by decoding each of (Element Management Management Message, hereinafter referred to as “EMM”) and common information (Entity Control Message, hereinafter referred to as “ECM”).

  The EMM is information such as individual contract information and key information (work key) for decrypting the encryption, and the ECM is program information used when descrambling, key information, and control information for the descrambling function. It is.

  The function related to the conditional access system is currently implemented as a B-CAS card in the satellite digital broadcasting system. However, as an application range of the present invention, only the master key is stored in the IC card 104 and the scramble key is stored. The decoding function may be realized by an application or hardware on the mobile terminal side, and does not necessarily have the same configuration as the B-CAS card. The IC card 104 communicates with the communication function unit 101 or the broadcast reception function unit 102 of the portable terminal through the IC card access control unit 103.

  The IC card access control unit 103 includes an IC card I / F (interface) 105, a buffer a 106, a buffer b 107, and an access monitoring unit 108.

  The IC card I / F 105 communicates with the IC card 104 by, for example, a half-duplex communication method implemented in conventional USIM and SIM cards.

  The buffer a106 and the buffer b107 temporarily store each data exchanged with the communication function unit 101 and the broadcast reception function unit 102.

  The access monitoring unit 108 checks the presence / absence of data in the buffer a106 and the buffer b107, and when data is present at the same time, the communication of one buffer is executed first.

  FIG. 2 is a schematic configuration diagram of a portable terminal 200 having a broadcast receiving function in which means for performing the IC card access control of FIG. 1 is installed. In the figure, the same reference numerals as those in FIG. 1 denote the same parts.

  The mobile terminal 200 includes an antenna 201 for receiving a television broadcast and an antenna 202 for mobile terminal communication as antennas.

  The control unit 203 includes, for example, a CPU, a memory, and the like. The control unit 203 operates the communication function unit 101 according to a control program to execute a voice call and data communication, and allows a TV broadcast to be viewed through the broadcast reception function unit 102. It also controls functions that are responsible for external human interfaces, such as a voice processing unit 204 that processes calls such as microphones and speakers, an image processing unit 205 that controls the display of a mobile phone, and an input processing unit 206 that controls key operation devices. is doing.

Hereinafter, processing when the IC card 104 is attached to the portable terminal 200 will be described.
First, when an IC card 104 having an area for storing a master key for scrambled broadcast decoding and a mechanism for extracting a scramble key using the master key is attached to the portable terminal 200 having a television broadcast receiving function, The IC card I / F 105 in the IC card access control unit 103 reads, from the IC card 104, subscriber information related to the communication function, telephone book data, and the like to the buffer a106 by an initial reading operation when the mobile terminal 200 is started up.

  The buffer a 106 transmits subscriber information to a server or the like through the communication function unit 101. The mobile terminal 200 becomes communicable when the subscriber information is authenticated by a server or the like managed by the business operator.

Next, descrambling of scrambled television broadcasting will be described.
First, the control unit 203 receives a control signal instructing reception of the scrambled television broadcast from the input processing unit 206, determines whether or not the broadcast reception function is turned on, and if the control signal is received. The broadcast reception function unit 102 reads EMM, ECM, and the like from the received television broadcast signal and stores them in the buffer b107.

  Next, the buffer b 107 delivers the EMM and ECM to the IC card 104 via the IC card I / F 105.

  Inside the IC card 104, a scramble key is extracted from the EMM and ECM using the master key stored in the IC card 104. The IC card I / F 105 outputs the scramble key from the IC card 104 to the buffer b 107, and the broadcast receiving function unit 102 receives the scramble key. The broadcast receiving function unit 102 can view the scrambled broadcast by performing descrambling with the scramble key.

  FIG. 3 is a flowchart showing the access control procedure of the IC card 104 in this embodiment. The following description is based on this flowchart.

  In S11, the control unit 203 determines whether or not the broadcast receiving function is turned on. When the broadcast reception function is turned on and the determination is “YES”, in S12, the broadcast reception function unit 102 receives EMM and ECM necessary for acquiring a scramble key for releasing scrambled broadcast from the broadcast signal. Is output to the buffer b107. If the control unit 203 determines that the broadcast reception function is not ON, the control unit 203 returns to S11 and repeats the determination.

  On the other hand, when the communication function is used, when the phone book data is written to the IC card 104, or in the normal standby state, the communication function unit 101 periodically accesses the IC card 104 for confirming the presence of the IC card 104. There is communication function related access. The access related to the communication function is delivered from the communication function unit 101 to the IC card 104 via the buffer a106 and the IC card I / F 105, and the response from the IC card 104 is also delivered through the reverse path.

  Here, when there is data simultaneously in the buffer a106 and the buffer b107 and the data is transferred as it is and a collision occurs in the IC card I / F 105, the access monitoring unit 108 first sets the data in one of the buffers to the IC card I / F. An instruction is given to hand it over to the IC card 104 through F105.

  After the EMM and ECM are stored in the buffer b107 in S12, in S13, the access monitoring unit 108 inquires whether data is stored in the buffer a106. When data is also stored in the buffer a106, in S14, for example, the access monitoring unit 108 temporarily stops the transfer of the buffer a106 to the IC card 104 and prioritizes the transfer of the buffer b107 to the IC card 104. . The buffer a <b> 106 maintains a state where data is stored until transfer permission is issued from the access monitoring unit 108.

  Next, in S <b> 15, the buffer b <b> 107 transfers the stored EMM and ECM to the IC card 104.

  In S16, the IC card 104 acquires the scramble key, and the IC card 104 outputs the scramble key to the buffer b 107 via the IC card I / F 105.

  In S17, the access monitoring unit 108 monitors whether data has been output to the buffer b107 and makes a determination. If no data is output to the buffer b107 and the determination is “NO”, the process returns to S17, the determination is repeated, and the transfer of the buffer a is stopped.

  If the data is output to the buffer b107 in S17 and “YES”, the data in the buffer a106 is transferred to the IC card 104 in S18.

  With the above access control method, it is possible to avoid collision even when access associated with reading the scramble key and access related to the communication function are simultaneous.

  Further, in the above description, after outputting data to the buffer b107, the access monitoring unit 108 inquires whether there is data in the buffer a106. If there is data in the buffer a106, the IC card 104 in the buffer a106. However, the data transfer from the buffer b 106 to the IC card 104 may be prioritized and the data transfer from the buffer b 107 to the IC card 104 may be temporarily stopped.

  On the contrary, when data is output to the buffer a106, the access monitoring unit 108 may inquire whether there is data in the buffer b107.

  In the above description, when data is stored in the buffer a106 or the buffer b107, the access monitoring unit 108 inquires whether data is stored in another buffer, and gives priority to either one. Although the transfer to the IC card I / F 105 and the IC card 104 is configured, the access monitoring unit 108 periodically monitors the buffer a106 and the buffer b107, and data is stored in both buffers. The transfer may be performed according to the priority order set in advance in the access monitoring unit 108.

  Here, the previously delivered data is processed inside the IC card 104 and becomes a response. When this response is issued from the IC card 104, it is first transferred and stored in an empty buffer and sent to the data request source. In the access monitoring unit 108, after the response stored in the previously transferred buffer is sent to the request source, transfer permission is issued to the other buffer in which the transfer is temporarily stopped, and the IC card I / F 105 is similarly used. Then, data transfer to the IC card 104 and response reception are performed, and processing similar to that during priority data processing is performed.

(Second Embodiment)
FIG. 4 is a schematic block diagram of a means for performing IC card access control of the portable terminal according to the present invention in the second embodiment.
In the present embodiment, an interface for selecting which of the broadcast reception function, the communication function, and both functions is used with priority is provided.

  In the figure, the same reference numerals as those in FIG. 1 denote the same parts. The difference from the first embodiment is that an access priority setting unit 301 for setting the priority of access to the IC card 104 of the buffer is provided. The selected priority setting is stored in the access monitoring unit 108.

  In the present embodiment, the IC card I / F 302 is assumed to have a command multiplexing function. The overall configuration of the mobile terminal is the same as that shown in FIG.

  FIG. 5 illustrates a process for multiplexing commands in communication between the IC card I / F 302 and the IC card 104.

  In the first embodiment, a pair of responses to access is executed one by one. In the second embodiment, access from the communication function unit 101 stored in the buffer a106 and the buffer b107, for example, authentication is performed. A command a including a command, a telephone book writing command, a command for confirming the presence of an IC card, and the like, and a command b including EMM and ECM as data from the broadcast receiving function unit 102 are transmitted to the IC card I / F 302. Multiplexed and transferred to the IC card 104 together.

  As shown in FIG. 5A, when the command a and communication function related data and the command b and broadcast related data are stored in the buffer a 106 and the buffer b 107, respectively, in the IC card I / F 302, FIG. As shown, the command a and the command b are multiplexed to become the command b + a, and the command b + a, the broadcast related data and the communication function related data are combined and output to the IC card 104.

  After data processing is performed inside the IC card 104, the responses a and b are multiplexed as shown in FIG. 5C, resulting in a response b + a, the response b + a, the scramble key, and the communication function related response. The data is synthesized and output to the IC card I / F 302. In this way, the multiplexed command is processed inside the IC card 104, and the response is multiplexed in the same way as the command and passed to the buffer a106 and the buffer b107 through the IC card I / F 302 to process two accesses at a time. Thus, both accesses can be processed with almost no time difference.

  In the IC card I / F 302, as shown in FIG. 5D, the demultiplexing of the responses a and b is performed to become the response a and the response b, and the response a and the communication function related response are respectively stored in the buffer a106 and the buffer b107. Output as data, response b and scramble key.

  By the way, at the time of command multiplexing, an option or the like that indicates that the command is multiplexed may be defined, or a dedicated command may be defined in advance, and the method is not particularly limited.

  The data delimiter is not particularly limited as long as it can be processed in the IC card 104 by defining a header indicating the data length in advance. The same applies to the multiplexing of responses from the IC card 104 and the like.

  In addition, for smooth broadcast viewing, it is generally considered that priority is given to reading of a scramble key that requires more real-time performance, and a scramble key retrieval command (command b) is brought to the head of command multiplexing. Thus, it is possible to preferentially process the scramble key extraction inside the IC card 104. In addition, since the response from the IC card 104 is given priority to the scramble key, smooth broadcast viewing can be performed.

  FIG. 6 illustrates a process in which scrambled encryption key reading is a priority response when command multiplexing is performed in communication between the IC card I / F 302 and the IC card 104.

  As shown in FIG. 6A, when the command a and communication function related data and the command b and broadcast related data are stored in the buffer a106 and the buffer b107, the IC card I / F 302 multiplexes the commands. The command b + a is generated, and the command b + a, broadcast-related data, and communication function-related data are combined and output to the IC card 104 as shown in FIG. 6B.

  In the IC card 104, the scramble key reading process is performed first, and the response b and scramble key data are output to the IC card I / F 302 as shown in FIG. Thus, it is stored in the buffer b107. Next, the communication function related data is processed in the IC card 104, and as shown in FIG. 6E, the response a and the communication function related response data are output to the IC card I / F 302, as shown in FIG. As described above, the response a and communication function related response data are stored in the buffer a106.

  As described above, the process of extracting the scramble key inside the IC card 104 is performed first, and the transfer to the IC card I / F 302 is performed first without waiting for the response process of the communication function related data. It becomes possible.

  When such processing is necessary, for example, a case where the response time limit as defined in the 3GPP specification is exceeded, or a case where the scramble key change timing every few seconds is exceeded is considered. .

  As described above, the second embodiment has been described. However, it is not necessary to perform all of them at the same time, and a combination of implementation methods may be selected as necessary.

(Third embodiment)
FIG. 7 is a schematic configuration diagram of a portable terminal 400 having a broadcast receiving function in the present embodiment. In the figure, the same reference numerals as those in FIG. 2 denote the same parts.

  The difference from FIG. 2 is that a TV viewing function monitoring unit 401 is newly provided, and the IC card access control function described in the first embodiment is operated only when the TV viewing function is ON. Is.

  When the TV viewing function is OFF by monitoring the TV viewing function ON / OFF by the TV viewing function monitoring unit 401, only the communication function-related processing, for example, the phone book data to the IC card 104 is performed. Processing such as writing and periodic access to the IC card 104 for confirming the presence of the IC card 104 is performed. For example, in this embodiment, only the buffer a106 is used. There is no collision in communication between the I / F 105 and the IC card 104, and the access monitoring unit 108 does not need to monitor the buffer.

  That is, in the present embodiment, there is a possibility that the output to the IC card 104 may collide only when the TV viewing function is ON, so the access monitoring unit 108 is configured to monitor the buffer.

  With such a configuration, the access monitoring unit 108 does not need to constantly monitor the buffer, and can realize power saving in the present invention. On the other hand, since the power consumption of the portable terminal is small and the power consumption is increased by using the TV viewing function, a configuration that saves power is useful.

  Here, the IC card access control function in the first embodiment is operated. However, the IC card access control function in the second embodiment may be operated, or these implementation methods are performed as necessary. May be selected in combination.

  Note that the portable terminal having the broadcast receiving function of the present invention and the IC card access control method by the portable terminal are not limited to the above illustrated examples, and various modifications can be made without departing from the gist of the present invention. Of course, it can be added.

It is a schematic block diagram about the means to perform IC card access control of the portable terminal which concerns on this invention in 1st Embodiment. It is a schematic block diagram of the portable terminal in 1st and 2nd embodiment. It is the flowchart figure shown about the procedure of the access control of the IC card in 1st Embodiment. It is a schematic block diagram about the means to perform IC card access control of the portable terminal which concerns on this invention in 2nd Embodiment. It is the figure explaining one Embodiment in the case of multiplexing a command by communication between IC card I / F and IC card in a 2nd embodiment. An embodiment for multiplexing commands in the communication between the IC card I / F and the IC card in the second embodiment has been described. It is a schematic block diagram of the portable terminal in 3rd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 Communication function part 102 Broadcast reception function part 103 IC card access control part 104 IC card 105, 302 IC card interface 106, 107 Buffer 108 Access monitoring part 200, 400 Portable terminal 201 Television broadcast receiving antenna 202 Cell phone communication antenna 203 Control unit 204 Audio processing unit 205 Image processing unit 206 Input processing unit 301 Access priority setting unit 401 TV viewing function monitoring unit

Claims (15)

A mobile terminal having a communication function and a broadcast receiving function,
First temporary storage means for temporarily storing data about the communication function;
Second temporary storage means for temporarily storing data relating to the broadcast receiving function;
An IC card interface for outputting data from the first and second temporary storage means to an IC card attached to the portable terminal;
Access monitoring means for monitoring the first and second temporary storage means,
A portable terminal having a broadcast receiving function, wherein the access monitoring means controls the temporary storage means for outputting data to the IC card interface.   The communication function includes a subscriber information authentication process, the broadcast reception function includes a scrambled broadcast decoding process, and the IC card includes the subscriber information and a master for the decoding process. The mobile terminal having a broadcast receiving function according to claim 1, wherein a key is stored. With an input processing unit,
The mobile terminal having the broadcast receiving function according to claim 1 or 2, wherein priority of the temporary storage unit is set from the input processing unit to the access monitoring unit.   The IC card interface multiplexes the commands of the data stored in the first and second temporary storage means, synthesizes the data of the first and second temporary storage means, and outputs to the IC card A portable terminal having the broadcast receiving function according to any one of claims 1 to 3.   The IC card interface demultiplexes responses of data input from the IC card, and separates and outputs the data to the first temporary storage means and the second temporary storage means. A portable terminal having the broadcast receiving function according to claim 4.   6. The broadcast receiving function according to claim 4, wherein the IC card interface multiplexes the command having a higher priority first when the command is multiplexed. Mobile device. A broadcast viewing function monitoring unit that monitors whether or not the broadcast reception function is operating,
2. The broadcast viewing function monitoring unit prioritizes output of data in the second temporary storage means to an IC card interface when the broadcast reception function is operating. Item 3. A portable terminal having the broadcast receiving function according to Item 2. A broadcast viewing function monitoring unit that monitors whether or not the broadcast reception function is operating,
The IC card interface multiplexes the commands of the data stored in the first and second temporary storage means when the broadcast receiving function is in operation, and the first and second temporary 3. A portable terminal having a broadcast receiving function according to claim 1, wherein the data in the storage means are combined and output to the IC card.   9. The mobile terminal having a broadcast receiving function according to claim 8, wherein when the command is multiplexed, the IC card interface multiplexes the command for the broadcast receiving function first. An IC card access control method by a mobile terminal that activates the communication function and the broadcast receiving function when a mobile terminal having a communication function and a broadcast receiving function acquires data from an IC card attached to the mobile terminal. ,
The portable terminal storing data on the communication function or the broadcast receiving function in the first or second temporary storage means;
Monitoring the data storage of the first and second temporary storage means;
And a step of controlling said temporary storage means for outputting data to an IC card interface.   The portable terminal multiplexes the commands of the data stored in the first and second temporary storage means at the IC card interface, and synthesizes the data in the first and second temporary storage means. 11. The IC card access control method by a portable terminal according to claim 10, wherein the IC card is output to the IC card.   12. The IC card access control method according to claim 11, wherein when the command is multiplexed, the command is multiplexed with the command having a higher priority first.   The portable terminal monitors whether or not the broadcast receiving function is operating. If the broadcast receiving function is operating, the portable terminal transmits the data in the second temporary storage means to the IC card interface. 11. The IC card access control method by a portable terminal according to claim 10, wherein output is prioritized.   The portable terminal monitors whether or not the broadcast receiving function is operating. When the broadcast receiving function is operating, the first and second temporary storages are performed by the IC card interface. 11. The portable terminal according to claim 10, wherein the command of the data stored in the means is multiplexed, the data in the first and second temporary storage means are combined and output to the IC card. IC card access control method.   15. The IC card access control method according to claim 14, wherein the portable terminal multiplexes the command for the broadcast reception function first when multiplexing the command.

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