KR20090088565A - Smart card, mobile communication terminal using the same and method for channel setting thereof - Google Patents

Abstract

A smart card, a mobile communication terminal in which the same is mounted and a channel establishing method thereof are provided to guarantee the normal operation of an application applet constructed on the smart card through the security of channel resources. A terminal body unit(100) receives a channel correspondingly to a channel establishment request. After performing a data communications process through the allocated channel, the terminal body unit generates a channel release request. A smart card unit(200) assigns a channel in response to the channel establishment request, and releases the allocated channel in response to the channel release request. In case channel resources are insufficient, after releasing a channel which is firstly established, the smart card unit newly allocates the released channel.

Description

Smart card, mobile communication terminal equipped with the same and its channel setting method

The present invention relates to a smart card, a mobile communication terminal equipped with the same, and a channel setting method thereof, and more particularly, to an application applet that can efficiently operate a channel resource and is built on a smart card through securing channel resources. The present invention relates to a smart card, a mobile communication terminal equipped with the same, and a channel setting method thereof, which can ensure correct operation of a smart card.

The mobile terminal is a combination of smart cards such as subscriber identity module (SIM), user identity module (UIM), universal subscriber identity module (USIM), and mobile communication terminal through second generation and 2.5 generation, starting with the first generation analog service. Has evolved into a third generation service.

As described above, smart cards such as SIM, UIM, and USIM are modules for storing personal information (communication service provider and user password, roaming information, user's personal phone number, etc.) of the mobile terminal user for the purpose of user authentication. It is easy to carry, allowing users to use mobile phones and e-commerce services, including international roaming, regardless of device type or carrier.

In addition, smart card not only protects personal information when a mobile terminal is lost or replaced due to its strong security function, but also provides a payment and authentication function that requires security. wide.

As an example of a smart card that can be mounted in a mobile communication terminal, a USIM card will be described below.

The USIM card is a type of smart card that is capable of storing and computing data and information used in a WCDMA terminal. Smart card is also called UICC (Universal Integrated Circuit Card) and is a COB (Chip On Board) type card with its own operation processing and mass storage because it has a microprocessor, memory, card operating system and security algorithm. .

The user can remove the smart card from the main body of the mobile communication terminal and insert the smart card into another mobile communication terminal, thereby providing a conventional service using a new mobile communication terminal without a separate subscription procedure.

Since the smart card is portable and easy to configure, the available channel resources are very limited compared to other devices. Therefore, it is difficult to secure channel resources during data communication with a mobile communication terminal or an external card reader. There is a problem that is difficult.

In addition, when a specific service (for example, payment / payment service) is to be used by using a mobile communication terminal, an application applet for providing a service on a smart card may be implemented. It can cause an applet to fail.

Accordingly, an aspect of the present invention is to provide a smart card for efficiently operating channel resources, a mobile communication terminal equipped with the same, and a channel setting method thereof.

Another object of the present invention is to provide a smart card, a mobile communication terminal equipped with the same, and a channel setting method thereof, which can ensure correct operation of an application applet built on a smart card by securing channel resources.

Technical problems to be achieved by the present invention are not limited to the above-mentioned technical problems, and other technical problems not mentioned above may be clearly understood by those skilled in the art from the following description. There will be.

According to an aspect of the present invention, a mobile communication terminal generates a channel setting request, receives a channel corresponding to the channel setting request, and performs a data communication process through the assigned channel. After that, the terminal body for generating a channel release request for releasing the allocated channel; And allocating a channel in response to the channel setting request and releasing the allocated channel in response to the channel releasing request, and releasing the first set channel among the plurality of channels provided when the channel resource is insufficient. It includes a smart card unit for allocating a newly allocated channel.

According to another aspect of the present invention, a mobile communication terminal generates a channel setting request, receives a channel according to the channel setting request, performs a data communication process through the assigned channel, and then allocates the allocated channel. A terminal body unit generating a channel release request for release; And allocating a channel in response to the channel setting request, releasing the allocated channel in response to the channel release request, updating time stamps for a plurality of channels provided at each data exchange point, and when channel resources are insufficient. And selecting a channel to be released based on time stamps for the plurality of channels, and releasing the selected channel and then newly assigning the channel.

In addition, a smart card according to an aspect of the present invention, the channel information database for storing the setting time each time the channel is allocated; An interface unit for receiving a channel setting request and a channel release request from the outside; A channel manager for checking whether there is an assignable channel among a plurality of channels in response to the channel setting request; A first channel allocator configured to allocate a channel in response to the channel setting request when there is an assignable channel as a result of the channel manager; And when there is no channel assignable due to lack of channel resources as a result of the channel manager's investigation, search the channel information database to release the first set channel among the plurality of channels, and release the released channel in response to the channel setting request. It includes a second channel allocator for assigning.

According to another aspect of the present invention, a smart card includes: a channel information database for updating a time stamp for each data exchange time for a plurality of channels that can be provided during communication; An interface unit for receiving a channel setting request and a channel release request from the outside; A channel manager for checking whether there is an assignable channel among the plurality of channels in response to the channel setting request; A first channel allocator configured to allocate a channel in response to the channel setting request when there is an assignable channel as a result of the channel manager; And when there is no channel that can be allocated due to lack of channel resources, as a result of the channel manager's investigation, the channel information database is searched to release a channel having the longest data exchange time among the plurality of channels, and in response to the channel setting request, And a second channel allocator for allocating the released channel.

In the smart card according to the above and other aspects of the present invention, the interface unit may be a contactless interface unit for performing wireless data communication with an external device, or a contact interface unit that is physically directly connected to the external device.

Meanwhile, in the channel setting method of the mobile communication terminal according to an aspect of the present invention, the smart card unit allocates a channel in response to a channel setting request, and releases the first set channel among the plurality of channels that can be provided when channel resources are insufficient. Allocating the released channel newly; A data communication process occurs over the assigned channel; Receiving, by the smart card unit, a channel release request as the data communication process is completed; And the smart card releasing the assigned channel in response to the channel release request.

In a channel setting method of a mobile communication terminal according to another aspect of the present invention, the smart card unit allocates a channel in response to a channel setting request, but selects a channel to be released based on a time stamp updated at each data exchange time when channel resources are insufficient. Releasing and then allocating the selected channel; A data communication process occurs over the assigned channel; Receiving, by the smart card unit, a channel release request as the data communication process is completed; And the smart card releasing the assigned channel in response to the channel release request.

The smart card according to the present invention made as described above, a mobile communication terminal equipped with the same, and a channel setting method thereof can efficiently operate channel resources, and ensure that application applets built on the smart card are secured through channel resources. Operation can be guaranteed.

Hereinafter, a mobile communication terminal equipped with a smart card according to preferred embodiments of the present invention will be described in detail with reference to FIGS. 1 to 5.

1 is a block diagram of a mobile communication terminal according to an embodiment of the present invention.

Referring to FIG. 1, a mobile communication terminal according to an embodiment of the present invention includes a terminal body part 100 and a smart card unit 200. The smart card unit 200 performs a data communication process through a logical channel formed between the terminal body unit 100 or an external card reader 300.

First, a detailed configuration of the terminal main body 100 is as follows.

The terminal body 100 includes four layers of the terminal software layer 110, the HAL 120, the terminal / service platform 130, and the application program layer 140.

The terminal software layer 110 includes various device drivers for controlling various devices for a mobile terminal service and a wireless Internet service such as a simple terminal operating system and communication basic functions, a processor or a modem, and vary in function or size depending on the manufacturer. Do. Handset operating systems include Microsoft's Windows CE and Symbian's Symbian. In particular, a smart card driver 111 for operating the smart card unit 200 is built in the terminal software layer 110.

The HAL 120 is a part where the terminal software layer 110 and the terminal / service platform 130 are interfaced, and is a layer that is responsible for porting to the terminal. The HAL 120 supports various types of terminal operating systems, thereby supporting hardware independence in platform porting. Abstraction (abstraction) for the terminal is made through the HAL 120, and the platform is configured independently of the hardware.

The terminal / service platform 130 is a terminal platform corresponding to a standard that standardizes an application execution environment of a mobile communication terminal, and a service platform that is built on a terminal platform to provide a specific service (for example, payment / payment service). (Eg, financial services platform).

As a terminal platform for operating a mobile communication terminal, Wireless Internet Platform for Interoperability (WIPI), Binary Runtime Environment for Wireless (BREW), Kilobyte Virtual Machine (KMV), or the like may be applied.

Since the WIPI platform has an independent and open nature for terminal and content development, developers can follow the WIPI standard specification in order to write an application that operates in common regardless of the type of mobile communication terminal.

The application program layer 140 is a layer in which various applications generated by a developer, such as a sound player, a map viewer, and a game, are implemented. Each application is executed by an operation of a mobile communication terminal. Can be. In particular, the application layer 140 performs a data communication process with the smart card unit 200 to provide a specific service (eg payment / payment service) 141 (eg payment / payment). Application).

The terminal main body 100 is equipped with a smart card unit 200 for storing personal information of a mobile communication terminal user for the purpose of user authentication. The developer may install the applet 230 in the smart card unit 200 to provide a specific service (eg, payment / payment service, transportation card service, etc.). The application 141 or the external card reader 300 of the terminal body 100 selects the applet 230 in the smart card unit 200 through a contact / contactless interface to provide a desired service. In this case, data communication is performed through a logical channel provided by the smart card unit 200.

Similar to the terminal main body 100, the card reader 300 reads the smart card unit 200 by performing a data communication process with the smart card unit 200 when a request of an internal application (not shown) is performed. Data is used to provide a particular service (eg payment / payment service).

The type of smart card unit 200 may vary depending on the type of terminal platform. For example, when the terminal platform is a WIPI standard, the smart card unit 200 may be constructed as a USIM card.

Smart card unit 200 is a maximum of N so that the applet 230 in the smart card unit 200 can communicate with the application 141 or the card reader 300 of the terminal body unit 100 through the contact / contactless interface (N may provide any number of natural numbers) at the same time.

The terminal main body 100 and the card reader 300 generate a channel setting request for securing channel resources during the data communication process, transmit the generated channel setting request to the smart card unit 200, and receive a corresponding channel. After performing the data communication process with the smart card unit 200 through the assigned channel, when the data communication process is completed, a channel release request for releasing the allocated channel is generated and transmitted to the smart card unit 200. . After receiving the channel release request, the smart card unit 200 terminates and releases the set channel to secure channel resources.

In this process, if an error occurs before the channel release request is transmitted and the channel is not terminated, the smart card unit 200 maintains the corresponding channel. Then, if such a channel is not released due to such an error, the smart card unit 200 can no longer allocate a new channel, and thus a situation in which the card cannot be used occurs.

That is, after the application 141 or the card reader 300 of the terminal main body 100 selects the applet 230 in the smart card unit 200 to exchange data, the channel resource used for data communication is closed. The channel resource set between the application 141 and the applet 230 must be released. By the way, when the communication between the application 141 and the applet 230 is abnormally terminated or when the channel is selected after the channel is selected by an external device approaching with an impure intention, the closing operation is not performed. It can happen that a resource is occupied without being released.

In this case, in order to correct when the communication is abnormally terminated in the smart card unit 200, channel resources are returned assuming abnormal termination of some channels, and the returned channel can be newly allocated.

Looking at the operation of the smart card unit 200 in more detail as follows.

The smart card unit 200 allocates a channel in response to a channel setting request transmitted from the terminal main body 100 or the card reader 300, and releases the allocated channel in response to the channel release request after the data communication process is completed. do.

When attempting to allocate a channel in response to a channel setting request, the smart card unit 200 detects whether the previous data communication process is abnormally terminated and allocates a channel according to the detection result. More specifically, the smart card unit 200 considers the first set channel among the plurality of channels that it can provide as an abnormally terminated channel when the channel resource is insufficient, releases the channel, and sets the released channel as a received channel. A new allocation will be made for the request.

As such, the smart card unit 200 is not allocated properly and is not terminated properly after being allocated to an application to detect a state in which channel resources are unnecessarily occupied, thereby preventing a situation in which channel resources become insufficient and correcting the proper operation of the applet 230. I can guarantee it.

FIG. 2 is a detailed configuration diagram of a smart card unit according to an embodiment of the present invention, and FIG. 3 is a diagram illustrating a data configuration stored in the channel information database of FIG. 2.

First, referring to FIG. 2, in order to provide a logical channel used for a data communication process, the smart card unit 200 may include an interface unit 211_1 and 211_2, a channel manager 212, a first channel allocator 213, The second channel allocator 214 and the channel information database 215 are included.

The interface units 211_1 and 211_2 receive the channel setting request and the channel release request transmitted from the terminal main body 100 or the card reader 300. Here, the interface units 211_1 and 211_2 may be a contactless interface unit 211_2 for performing wireless data communication with an external card reader 300 or may be physically connected to the terminal body unit 100 to perform direct data communication. It may also be a contact interface 211_1 to perform.

The channel manager 212 checks whether there is an assignable channel among the plurality of channels provided by the smart card unit 200 in response to the channel setting request.

The first channel allocator 213 allocates a channel in response to the channel setting request when there is an assignable channel as a result of the channel manager 212.

If there is no channel that can be allocated due to lack of channel resources, the second channel allocator 214 assumes an abnormally terminated channel among a plurality of available channels and selects an abnormally terminated channel. Releases the newly released channel in response to the channel setting request.

In detail, when all channel resources are occupied and there is no assignable channel, the second channel allocator 214 searches the channel information database 215 to allocate the first channel among the plurality of channels, that is, the longest allocated time. Investigate the channel, and release it by determining that the channel has abnormally terminated in a previous data communication process. Then, the released channel is newly allocated as a channel for the received channel setting request.

The channel information database 215 stores the time at which the channel is set whenever a new channel setting request is received from the terminal main body 100 or the card reader 300 to set the channel. Data stored in the channel information database 215 may be configured as shown in FIG. 3.

The configuration of the channel information database 215 and the channel management standard of the smart card unit 200 will be described with reference to FIG. 3 as follows.

The channel information database 215 includes channel numbers of logical channels that the smart card unit 200 can provide, a status indicating whether each channel is activated or deactivated, a device number of a device (or application) assigned to each channel, Each channel includes a set time of setting.

The smart card unit 200 supports up to four logical channels, and channel 0 is used for a communication function from terminal booting to termination. Channel 0 is activated every time the terminal is booted, and keeps it until the terminal is terminated. Channel 0 is always in use by an application in the smart card unit 200. Therefore, when the smart card unit 200 is to be read or terminated by the application 141 or the card reader 300 of the terminal body unit 100 in connection with a specific purpose service such as finance, the smart card unit ( Instead of activating / deactivating 200), logical channels 1, 2 and 3 should be allocated / released.

When the channel resource for the channel setting request is insufficient, the smart card unit 200 searches the channel information database 215 to check the setting time of each channel, and the first set channel based on the setting time, that is, the longest time. Releases a previously set channel and allocates a new one. In the case of Figure 3, channel 0 is used by the application of the smart card unit itself, and channel 1 is the longest since the channel 1 is set compared to the channel 2, channel 3, channel 1 is insufficient when the channel resources are insufficient. It will be freed up and allocated again.

4 is a detailed configuration diagram of a smart card unit according to another embodiment of the present invention, and FIG. 5 is a diagram illustrating a data configuration stored in the channel information database of FIG. 4.

Referring to FIG. 4, the smart card unit 200 according to another embodiment of the present invention may include an interface unit 221_1 and 221_2, a channel manager 222, a first channel allocator 223, and a second channel allocator ( 224, a channel information database 225.

The smart card unit 200 allocates a channel in response to the channel setting request sent from the application 141 and releases the allocated channel in response to the channel release request sent after the data communication process is completed.

Here, the smart card unit 200 according to another embodiment of the present invention updates the time stamps for the plurality of channels at each data exchange time point, and when the channel resources are insufficient, the smart card unit 200 refers to the time stamps for the plurality of channels. Select a channel to be released, and release the selected channel and allocate a new one.

The channel information database 225 updates and stores a time stamp for each of the data exchange points for the plurality of channels that can be provided by the smart card unit 200.

Data stored in the channel information database 225 may be configured as shown in FIG.

The interface units 221_1 and 221_2 receive a channel setting request and a channel release request from an external application 141. As in the exemplary embodiment, the interface units 221_1 and 221_2 may be contactless interface units 221_2 for performing wireless data communication with an external card reader 300 or may be physically connected to the terminal body unit 100. The contact interface unit 221_1 may be provided.

The channel manager 222 examines whether there is an assignable channel among the plurality of channels provided by the smart card unit 200 in response to the received channel setting request.

If there is an assignable channel as a result of the channel manager 222 investigation, the first channel allocator 223 allocates the channel according to the channel setting request.

If there is no channel that can be allocated due to the lack of channel resources, the second channel allocator 224 searches the channel information database 225 to find out which channel has the longest data exchange point among the plurality of channels. Releases and allocates newly released channel according to channel setup request.

As in the case of the exemplary embodiment, the terminal main body 100 or the external card reader 300 generates a channel setting request for the data communication process and transmits it to the smart card unit 200 and a channel corresponding to the channel setting request. Gets assigned. After performing a data communication process through the assigned channel, a channel release request for releasing the allocated channel is generated.

Referring to FIG. 5, the channel information database 225 displays channel numbers of logical channels that the smart card unit 200 can provide, states indicating whether each channel is activated or deactivated, and a device assigned to each channel (or Application), a setting time at which each channel is set, a time stamp indicating a data exchange time of each channel, and the like.

In FIG. 5, the smart card unit 200 supports up to four logical channels, and channel 0 is activated at boot time to control the smart card unit 200 to be used by an application in the smart card unit 200. When a channel allocation / release request is received from the terminal body unit 100 or the card reader 300, the smart card unit 200 allocates / releases channels 1, 2, and 3 except for channel 0.

The smart card unit 200 manages while updating the time stamp each time data is exchanged, and if the channel resource is insufficient, the smart card unit 200 searches the channel information database 225 and checks the time stamp for each channel, so that each channel finally receives the data. Investigate the time of exchange. Based on the time stamp, the channel with the oldest data exchange time point is released and newly allocated.

This method selects a channel to be released based on the last time data is exchanged, not the time at which the channel is set, so that the terminal body 100 or the card reader 300 sets the channel in the smart card unit 200. This can be useful when you want to provide a service that sends data after waiting for a long time.

Hereinafter, a channel setting method of a mobile communication terminal equipped with a smart card according to preferred embodiments of the present invention will be described in detail with reference to FIGS. 6 and 7.

6 is a flowchart illustrating a channel setting method of a mobile communication terminal according to an embodiment of the present invention, and is illustrated based on the configuration of FIGS. 1 and 2. For convenience of description, it is assumed that a communication is performed between the application 141 and the smart card unit 200 in the terminal main body unit 100, and will be described using ISO 7816, an international standard for smart cards.

First, in step S110, the smart card unit 200 allocates a channel in response to a channel setting request (MANAGE Channel (open)) transmitted from the terminal body unit 100, but when the channel resources are insufficient abnormal termination of some channels Assuming that the channel is released, new allocation is made. At this time, the smart card unit 200 regards the first channel among the plurality of logical channels that can be supported as an abnormally terminated channel and releases it, and newly allocates the released channel to the received channel setting request.

That is, when all N channels that the smart card unit 200 can support are in use, and when a new channel setting request (MANAGE Channel (open)) is received, there is an abnormally terminated channel among all N channels. Assume, after releasing the oldest channel that has been established, the released channel is allocated to a new channel establishment request (MANAGE Channel (open)).

The step S110 for allocating channel resources may be subdivided into steps S111 to S119.

In operation S111, the smart card unit 200 continuously manages the channel setting time in the channel information database 215 whenever a plurality of supportable channels are allocated.

Since the smart card unit 200 may provide several logical channels for data communication, the smart card unit 200 allocates different channels according to the device number (devnum), and the device number (devnum) and the corresponding channel number (Channel Number). The mapping table is stored in the channel information database 215 and managed to allow the control of the corresponding channel by the device number devnum.

Whenever a channel setting request (MANAGE Channel (open)) is received, the smart card unit 200 stores the setting time of the corresponding channel in the channel information database 215.

In step S112_1, the application 141 of the terminal main body 100 transmits a card open command (IC Card OPEN) for using the smart card unit 200 to the smart card driver 111.

In step S112_2, the smart card driver 111 generates a channel setting request (MANAGE Channel (open)) for a card open command (IC Card OPEN) and transmits it to the smart card unit 200, and the smart card unit 200. Receives the transmitted channel setup request (MANAGE Channel (open)).

In step S113, when a channel setting request (MANAGE Channel (open)) is received, the smart card unit 200 checks whether there is a channel that can be currently allocated.

If there is an assignable channel resource, in order to allocate a channel for the channel setting request, the smart card unit 200 proceeds to step S115 to obtain a channel number to be allocated.

If all channel resources are occupied and thus channel allocation is impossible, the smart card unit 200 proceeds to step S114. In operation S114, the smart card unit 200 searches the channel information database 215 to identify and release the first allocated channel among the plurality of channels that can be provided. Thereafter, the method proceeds to step S115 to acquire a released channel number, thereby newly assigning the released channel to the channel setting request MANAGE Channel (open).

In operation S116, the smart card unit 200 transmits the channel number obtained in operation S115 to the smart card driver 111 of the terminal main body unit 100.

In step S117, the smart card driver 111 maps the received channel number with the device number devnum and stores it in the mapping table, and together with the terminal / service platform (ATR: Answer To Reset) 130). The reset response ATR is a response signal of the smart card unit 200 to the reset signal of the terminal body unit 100.

In step S118, the terminal / service platform 130 transmits the device number fvd corresponding to the device number devvnum to the application 141 which transmitted the IC card OPEN together with the reset response ATR. do.

In operation S119, the application 141 of the terminal main body 100 obtains the device identifier fd together with the reset response ATR as a result of the card open command IC Card OPEN.

As such, when the card open command (IC Card OPEN) is transmitted from the application 141 in the terminal main body unit 100, the smart card driver 111 uses the channel setting request (MANAGE Channel (open)). Obtain a channel number from 200.

The smart card driver 111 maps the acquired channel number with a device number (devnum) to be returned as a result of the card open command (IC Card OPEN) and manages it with a mapping table. The device number (devnum) is returned as a result of the IC card OPEN along with the reset response (ATR) obtained at initial activation.

In operation S120, a data communication process is performed between the smart card unit 200 and the application 141 of the terminal body unit 100 through the allocated channel.

An APDU (Application Protocol Data Unit) command is used for communication between the terminal main body 100 and the smart card unit 200.

The APDU command delivered to the returned device number devnum is transmitted to the smart card unit 200 through a channel mapped with the corresponding device number devnum on the mapping table. At this time, since channel 0 is always used in the application of the smart card unit 200, the case where channel 0 is allocated to the application 141 of the terminal body unit 100 does not occur.

Here, the application 141 of the terminal main body 100 generates a message authentication code (MAC) and transmits it with the APDU command for security in the communication process. In this case, when the application 141 converts the channel number included in the CLA (Class byte) of the APDU header to 00 to calculate the MAC and transmits the MAC to the smart card unit 200, the smart card unit 200 is transmitted. When verifying the MAC received from the application 141 of the terminal main body 100, the channel number (Channel Number) included in the CLA is converted to 00 and verified.

In step S130, after the data communication process is completed, the smart card unit 200 releases the channel allocated to the corresponding device number devnum to return the channel resource. Step S130 includes step S131 and step S132.

In operation S131, the application 141 transmits an IC card CLOSE command to end the use of the smart card unit 200 to the smart card driver 111. The IC card CLOSE includes information necessary for the termination of the smart card unit 200, such as a device number devnum or a device identifier fd.

In step S132, the smart card driver 111 generates a channel release request (MANAGE Channel (close)) for the card end command (IC Card CLOSE) to transmit to the smart card unit 200, smart card unit 200 Receives the transmitted channel release request (MANAGE Channel (close)).

In operation S140, the smart card unit 200 releases the channel resource allocated to the corresponding device number devnum in response to the channel release request (MANAGE Channel (close)).

Here, the smart card driver 111 of the terminal main body 100 transmits the device number received by using the channel release request (MANAGE Channel (close)) when the application 141 transmits the card termination request (IC Card CLOSE). The channel mapped to devnum) is released, and the terminated device number (devnum) is returned to the application 141. When the application 141 requests the termination of channel 0, the smart card driver 111 does not transmit the corresponding APDU command to the smart card unit 200, and responds as having been normally terminated.

The above-described data communication process and command-response transmission and reception may be performed through a contact channel that physically connects the terminal main body 100 and the smart card unit 200. The channel control method as shown in FIG. 6 may be applied between the card reader 300 and the smart card unit 200. In this case, the contactless channel formed between the smart card unit 200 and the external card reader 300 may be used. Communication can be made through.

7 is a data flow diagram illustrating a channel setting method of a mobile communication terminal according to another embodiment of the present invention, and illustrates a series of processes occurring in the smart card unit 200 of FIG.

First, in step S210, the smart card unit 200 receives a channel setting request from the terminal main body 100 or the card reader 300, and allocates a channel in response to the received channel setting request. If there is no channel that can be allocated due to lack of channel resources, the channel information database 225 is searched to select a channel to be released based on a time stamp updated at each data exchange time point, and the selected channel is released and then newly allocated.

The step S210 for channel allocation may be subdivided into steps S211 to S215.

In operation S211, the smart card unit 200 stores and manages a time stamp for each channel in the channel information database 225 for a plurality of channels that can be provided. When each channel is first assigned, the set time of that channel is stored in the channel information database 225, and each time a data exchange occurs over that channel, i.e. each time an APDU command is received, the time stamp of that channel. Is updated.

In operation S212, the smart card unit 200 receives a channel setting request transmitted from the terminal body unit 100 or the card reader 300.

In step S213, the smart card unit 200 checks whether there is a currently assignable channel among a plurality of supportable channels in response to the received channel setting request.

If there is an assignable channel, the smart card unit 200 proceeds to step S215 and allocates a channel to the channel setting request.

If there is no assignable channel, the smart card unit 200 proceeds to step S214 to search the channel information database 225. After selecting a channel to be released based on the time stamp for each channel stored in the channel information database 225 to release the selected channel, the process proceeds to step S215 to newly allocate the released channel. Here, the time stamp indicates the time of data exchange, and the smart card unit 200 releases the channel having the longest time when data was last exchanged among all the channels based on the time stamps of a plurality of channels. The channel will be allocated for a new channel setup request.

Next, in step S220, a data communication process is performed between the smart card unit 200 and the terminal body unit 100, or between the smart card unit 200 and the card reader 300 through the assigned channel. In this case, the smart card unit 200 performs data communication by transmitting an APDU command through an assigned channel and receiving a response. When the APDU command is received, the smart card unit 200 stores the time for each channel stored in the channel information database 225. Update the stamp.

In operation S230, the smart card unit 200 releases the allocated channel to secure channel resources.

The step S230 may be subdivided into steps S231 to S233.

In operation S231, as the data communication process is completed, the smart card unit 200 determines whether a channel release request is transmitted from the terminal body unit 100 or the card reader 300.

When the channel release request is received, the smart card unit 200 proceeds to step S233 in response to release the channel allocated to the channel setting request.

If the channel release request is not received even after a certain time, step S232 may be performed.

The smart card unit 200 presets the maximum allowable time in seconds or minutes until the channel is released from the last data exchange, and then waits for the maximum allowable time in step S232. Here, the smart card unit 200 may secure the channel resource by releasing the channel by determining that the channel without data exchange is abnormally terminated even after a predetermined maximum allowable time.

In operation S233, the smart card unit 200 releases the allocated channel in response to the channel release request.

The embodiment of FIG. 7 selects a channel to be released based on a data exchange time instead of a channel setting time when channel resources are insufficient. Therefore, the embodiment of FIG.

In addition, if the maximum allowable time is arbitrarily designated and the channel without data exchange is automatically released after the designated maximum allowable time, channel resource shortage can be improved.

The above-described processes of FIG. 7 may be performed through a contactless channel formed between the smart card unit 200 and the external card reader 300, and physically attached to the smart card unit 200 and the smart card unit 200. It may be made through a contact channel formed between the terminal body portion 100 is directly connected.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. I can understand that.

Therefore, since the embodiments described above are provided to completely inform the scope of the invention to those skilled in the art, it should be understood that they are exemplary in all respects and not limited. The invention is only defined by the scope of the claims.

The present invention can be usefully applied to a mobile communication terminal equipped with a smart card and a channel setting method thereof.

In addition, the present invention can efficiently operate channel resources in the data communication process, and can ensure the correct operation of the application applet built on the smart card.

1 is a block diagram of a mobile communication terminal according to an embodiment of the present invention.

2 is a detailed configuration diagram of a smart card unit according to an embodiment of the present invention.

3 is a diagram illustrating a data configuration stored in the channel information database of FIG.

4 is a detailed configuration diagram of a smart card unit according to another embodiment of the present invention.

FIG. 5 is a diagram illustrating a data configuration stored in the channel information database of FIG. 4. FIG.

6 is a data flow diagram illustrating a channel setting method of a mobile communication terminal according to an embodiment of the present invention.

7 is a data flow diagram illustrating a channel setting method of a mobile communication terminal according to another embodiment of the present invention.

*** Explanation of symbols for the main parts of the drawing ***

100: terminal body 111: smart card driver

141: Application 200: smart card unit

230: Applet 300: Card Reader

Claims (21)

A terminal main body unit generating a channel setting request, receiving a channel according to the channel setting request, performing a data communication process through the assigned channel, and generating a channel release request for releasing the allocated channel. ; And Allocate a channel in response to the channel setting request, and release the allocated channel in response to the channel release request, and release the first set channel among the plurality of channels provided when the channel resource is insufficient. Smart card section to allocate new channel Mobile communication terminal comprising a. The method of claim 1, wherein the smart card unit, A channel information database for storing a set time every time a channel is allocated; An interface unit for receiving the channel establishment request and the channel release request; A channel manager for checking whether there is an assignable channel among the plurality of channels in response to the channel setting request; A first channel allocator configured to allocate a channel in response to the channel setting request when there is an assignable channel as a result of the channel manager; And As a result of the channel manager's investigation, when no channel is allocated due to lack of channel resources, the channel information database is searched to release the first set channel among the plurality of channels, and the released channel is determined in response to the channel setting request. Allocating second channel allocator Mobile communication terminal comprising a. The method of claim 2, wherein the interface unit of the smart card unit, A mobile communication terminal comprising a contactless interface unit for performing wireless data communication with an external card reader. The method of claim 2, wherein the interface unit of the smart card unit, And a contact interface unit physically connected to the terminal body unit. A terminal main body unit generating a channel setting request, receiving a channel according to the channel setting request, performing a data communication process through the assigned channel, and generating a channel release request for releasing the allocated channel. ; And Allocate a channel in response to the channel setting request, release the allocated channel in response to the channel release request, update time stamps for a plurality of channels provided at each data exchange point, and when the channel resource is insufficient, A smart card unit that selects a channel to be released based on time stamps for a plurality of channels, and releases the selected channel and newly allocates the channel. Mobile communication terminal comprising a. The method of claim 5, wherein the smart card unit, A channel information database for updating the time stamp for each of the data exchange points for the plurality of channels; An interface unit for receiving the channel establishment request and the channel release request; A channel manager for checking whether there is an assignable channel among the plurality of channels in response to the channel setting request; A first channel allocator configured to allocate a channel in response to the channel setting request when there is an assignable channel as a result of the channel manager; And As a result of the channel manager's investigation, if there is no channel that can be allocated due to lack of channel resources, the channel information database is searched to release a channel having the longest data exchange time among the plurality of channels, and in response to the channel setting request, Second channel allocator for allocating the released channel Mobile communication terminal comprising a. The method of claim 6, wherein the interface unit of the smart card unit, A mobile communication terminal comprising a contactless interface unit for performing wireless data communication with an external card reader. The method of claim 6, wherein the interface unit of the smart card unit, And a contact interface unit physically connected to the terminal body unit. A channel information database for storing a set time every time a channel is allocated; An interface unit for receiving a channel setting request and a channel release request from the outside; A channel manager for checking whether there is an assignable channel among a plurality of channels in response to the channel setting request; A first channel allocator configured to allocate a channel in response to the channel setting request when there is an assignable channel as a result of the channel manager; And As a result of the channel manager's investigation, if there is no channel that can be allocated due to lack of channel resources, the channel information database is searched to release the first set channel among the plurality of channels, and the released channel in response to the channel setting request is performed. Second channel allocator for assigning Smart card that includes. A channel information database for updating a time stamp for each of the data exchange points for a plurality of channels that can be provided during communication; An interface unit for receiving a channel setting request and a channel release request from the outside; A channel manager for checking whether there is an assignable channel among the plurality of channels in response to the channel setting request; A first channel allocator configured to allocate a channel in response to the channel setting request when there is an assignable channel as a result of the channel manager; And As a result of the channel manager's investigation, if there is no channel that can be allocated due to lack of channel resources, the channel information database is searched to release a channel having the longest data exchange time among the plurality of channels, and in response to the channel setting request, Second channel allocator for allocating the released channel Smart card that includes. The method of claim 9 or 10, wherein the interface unit, Smart card, characterized in that the contactless interface for performing wireless data communication with the external device, or a contact interface that is physically directly connected to the external device. Allocating a channel in response to a channel setting request by the smart card unit, releasing a channel set first among a plurality of channels that can be provided when channel resources are insufficient, and then newly allocating the released channel; A data communication process occurs over the assigned channel; Receiving, by the smart card unit, a channel release request as the data communication process is completed; And The smart card releasing the assigned channel in response to the channel release request Channel setting method of the mobile communication terminal comprising a. The method of claim 12, wherein the channel assignment step, Storing the set time in a channel information database each time the channel is allocated to the smart card unit; Receiving, by the smart card unit, the channel setting request; Examining, by the smart card unit, whether there is an assignable channel among the plurality of channels in response to the channel setting request; Allocating a channel in response to the channel setting request by the smart card unit when there is an assignable channel; If there is no assignable channel, retrieving the channel information database by the smart card unit and releasing the first set channel among the plurality of channels; And The smart card unit allocating the released channel in response to the channel setting request Channel setting method of the mobile communication terminal comprising a. The method of claim 12, wherein the data communication process, The channel setting method of the mobile communication terminal, characterized in that made via a contactless channel formed between the smart card unit and an external card reader. The method of claim 12, wherein the data communication process, The channel setting method of the mobile communication terminal, characterized in that made through the contact channel formed between the smart card unit and the terminal body. Allocating a channel in response to a channel setting request by the smart card unit, selecting a channel to be released based on a time stamp updated at each data exchange time when the channel resource is insufficient, releasing the selected channel and newly assigning the channel; A data communication process occurs over the assigned channel; Receiving, by the smart card unit, a channel release request as the data communication process is completed; And The smart card releasing the assigned channel in response to the channel release request Channel setting method of the mobile communication terminal comprising a. The method of claim 16, wherein the channel assignment step, Updating a time stamp for each of the data exchange points for a plurality of channels that can be provided by the smart card unit; Receiving, by the smart card unit, the channel setting request; Examining, by the smart card unit, whether there is an assignable channel among the plurality of channels in response to the channel setting request; Allocating a channel in response to the channel setting request by the smart card unit when there is an assignable channel; If there is no assignable channel, the smart card unit searching the channel information database to select a channel to be released based on time stamps for the plurality of channels and releasing the selected channel; The smart card unit allocating the released channel in response to the channel setting request Channel setting method of the mobile communication terminal comprising a. The method of claim 17, wherein in the channel release step, The smart card unit releases a channel having the longest data exchange point among the plurality of channels based on time stamps of the plurality of channels. The method of claim 17, wherein in the channel release step, The smart card unit presets a maximum allowable time from the time of last data exchange until the channel is released, and determines that the channel without data exchange after the maximum allowable time is abnormally terminated. A channel setting method of a mobile communication terminal, characterized in that. The method of claim 16, wherein the data communication process, The channel setting method of the mobile communication terminal, characterized in that made via a contactless channel formed between the smart card unit and an external card reader. The method of claim 16, wherein the data communication process, And a contact channel formed between the smart card unit and a terminal main body unit which is directly connected to the smart card unit.

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