KR20060003613A - Method of searching service band in wireless communication terminal - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a service band search method in a wireless communication terminal.

2. The technical problem to be solved by the invention

The present invention reads the wireless communication service provider information (MCC, MNC) from the identification module card in the wireless communication terminal, and then stores the wireless communication service provider information (MCC, MNC) from the previously stored service band database. It is an object of the present invention to provide a method for searching a service band in a wireless communication terminal, so that a service band can be set faster by performing a search by selecting a corresponding service band value.

3. Summary of the Solution of the Invention

According to an aspect of the present invention, there is provided a method for searching a service band in a wireless communication terminal, comprising: a service band database storing step of storing wireless service provider information and a service band value corresponding to each other; A wireless communication service provider information loading step of reading wireless communication service provider information from the identification module card; A service band database searching step of searching for a service band value corresponding to the read wireless communication service provider information from the service band database; A first service band search step of searching for a service band using the service band value if a service band value corresponding to the wireless communication service provider information exists as a result of the search; And a second service band searching step of searching for a service band for all bands when there is no service band value corresponding to the wireless communication service provider information as a result of the search.

4. Important uses of the invention

The present invention is used in a wireless communication terminal.

Wireless communication terminal, subscriber identity module (SIM), user identity module (UIM), wireless service provider information, service band search

Description

Method of Searching Service Band in Wireless Communication Terminal             

1 is a flowchart illustrating a service band search method in a conventional wireless communication terminal;

2 is a configuration diagram of an embodiment of a wireless communication terminal to which the present invention is applied;

3 is a flowchart illustrating a service band search method in a wireless communication terminal according to the present invention.

* Explanation of symbols on the main parts of the drawing

21: wireless transmission and reception device 22: operation / control device

23: Codec 24: Storage device

25: audio output device (speaker) 26: display (LCD)

27: input device (keypad) 28: voice input device (microphone)

29: subscriber identity module (SIM) card

The present invention relates to a method for searching a service band in a wireless communication terminal, and more particularly, after reading wireless communication service provider information (MCC, MNC) from an identification module card in a wireless communication terminal, the service band is stored in advance. A service in a wireless communication terminal for selecting a service band value corresponding to the wireless communication service provider information (MCC, MNC) from a (band) database and performing a search so that the service band can be set faster. A band search method.

In the present invention, a wireless communication terminal refers to a mobile communication terminal, a personal portable communication terminal (PCS), a personal digital terminal (PDA), a smartphone, a mobile terminal capable of wireless communication while being carried by an individual such as a next generation mobile communication terminal (IMT-2000). Say.

In the present invention, the identity module card is a concept including a subscriber identity module (SIM) card, a user identity module (UIM) card, and a universal subscriber identity module (USIM) card. Is the term of.

Recently, IC (Integrated Circuit) cards, which are being used in various fields such as telecommunications, finance, transportation, and e-commerce, are showing rapid growth due to the rapid increase in the use of the Internet and changes in the information and communication environment. In particular, based on the development of semiconductor and software technology, the application field is expanding due to the large amount of information recording capability and high security that the existing magnetic card does not have.

The IC card has a memory card and a smart card according to the chip functions. The memory card is a card that only stores data. The smart card has a built-in logic circuit and a central processing unit (CPU) to perform a small computer function. have. Smart cards are used in various ways, such as IC cards, chip cards, microprocessor cards, and CPU cards, depending on the scope of application.In general, smart cards are equipped with "microprocessors, operating systems, security modules, memory, etc. Credit card sized plastic card with integrated IC chip. " Smart cards are usually the most in the form of credit cards, and there are also quite a few cards that are inserted into wireless communication terminals.

Smart card modules used in wireless communication terminals are typical of Subscriber Identity Module (SIM), User Identity Module (UIM), Universal Subscriber Identity Module (USIM), etc. There is this.

First, the subscriber identity module (SIM) is a smart card module inserted into a European wireless communication (GSM) terminal for wireless communication network authentication, and complies with ISO 7816 and stores non-volatile data (telephone number, subscriber's wireless communication service provider). , Personal phonebooks, etc.) and limited cryptographic functions and software execution. In addition, a SIM card using a subscriber identity module (SIM) includes a telephone number, a personal security key, and data necessary for operating a wireless communication terminal. When the card is installed in a new wireless communication terminal, the call can be made to the new wireless communication terminal. In addition to the security function, this card can store all the information stored in the existing wireless communication terminal and can also be used as a debit card, credit card, bus card. The subscriber identity module (SIM) card is currently being developed as a core platform for implementing future revenue-based data services centered on European wireless communication service providers based on GSM.

In contrast, the User Identity Module (UIM) is a smart card module that conforms to ISO 7816. It is inserted into multiple modes of Code Division Multiple Access (CDMA) and European wireless communication (GSM) terminals, and is a European wireless communication (GSM) network. Roaming is possible at. A user identification module (UIM) card using a user identification module (UIM) is a type of CDMA Subscriber Identity Module (SIM) card. The Universal Subscriber Identity Module (USIM) is also a smart card module that conforms to ISO 7816. It is inserted into the 3rd generation wireless communication terminal to provide network authentication and additional functions. It is standardized for mounting.

Meanwhile, in the current European wireless communication (GSM) method, a wireless communication service provider may be selected by using a subscriber identity module (SIM) card. That is, when a user purchases a subscriber identity module (SIM) card of a wireless communication service provider and installs it in a wireless communication terminal, the user can receive a service from the wireless communication service provider. When the SIM card is purchased and installed in the wireless communication terminal, the service can be received from the B wireless service provider.

However, in order to perform an overseas roaming service using a wireless communication terminal used in Korea, a service band is first searched using a default band value stored in a nonvolatile memory (NV RAM or EPROM). After searching, if the service band search fails by using the default band value, it takes a long time because the service band is found by searching all bands. A service band search method in a conventional wireless communication terminal will be described in more detail with reference to FIG. 1.

1 is a flowchart illustrating a service band search method in a conventional wireless communication terminal.

First, in operation 101, a default band value stored in a storage device is read and searched.

As a result, it is confirmed whether the service band search is successful (102). If the service band search is successful, the default band which is successful in the search is set as the service band (105), and the service band search is performed. If it fails, search is performed for all bands in turn (103).

As a result, it is confirmed whether the service band search is successful (104). If the service band search is successful, the band which succeeded in the search is set as the service band (105), and the service band search fails. If so, a signal indicating that the current service is unavailable is output (106).

As described above, in the prior art, a search is performed using a pre-stored dividing band value in order to search for a service band, and as a result, if the service band search fails, the sequential search is performed for the entire band. In addition to the band, there was a problem that a lot of searching time is required.

The present invention has been proposed to solve the above problems, and after reading the wireless communication service provider information (MCC, MNC) from the identification module card in the wireless communication terminal, from the pre-stored service band database (band) database By selecting a service band value corresponding to the wireless communication service provider information (MCC, MNC) and performing a search, a service band search method is provided in a wireless communication terminal so that the service band can be set more quickly. Its purpose is to.

Other objects and advantages of the present invention can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. Also, it will be readily appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

According to an aspect of the present invention, there is provided a service band retrieval method in a wireless communication terminal, the service band database storing step of storing wireless service provider information and service band values so as to correspond to each other; A wireless communication service provider information loading step of reading wireless communication service provider information from the identification module card; A service band database searching step of searching for a service band value corresponding to the read wireless communication service provider information from the service band database; A first service band search step of searching for a service band using the service band value if a service band value corresponding to the wireless communication service provider information exists as a result of the search; And a second service band search step of searching for a service band for all bands when there is no service band value corresponding to the wireless communication service provider information as a result of the search.

The present invention may further include a service band database updating step of storing a service band value obtained as a result of performing a service band search for all bands in the service band database so as to correspond to the wireless communication service provider information. It features.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, whereby those skilled in the art may easily implement the technical idea of the present invention. There will be. In addition, in describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following embodiment, a subscriber identity module (SIM) card will be described as an example.

2 is a configuration diagram of an embodiment of a wireless communication terminal to which the present invention is applied.

As shown in Figure 2, the wireless communication terminal to which the present invention is applied, the wireless transmission and reception apparatus 21 for transmitting and receiving a signal wirelessly through an antenna, and driving and controlling the wireless communication terminal, subscriber identification module (SIM) ) Read wireless communication service provider information (MCC, MNC) from the card 29, and then read from the subscriber identity module (SIM) card 29 from the service band database previously stored in the storage device 24 Computation / control device 22 for performing a service band search by selecting a service band value corresponding to communication service provider information, and the wireless transmission / reception device 21 under the control of the computation / control device 22. Converts the signal received from the voice to the voice output device (speaker) 25, and converts the voice received from the voice input device (microphone) 28 into a signal to the operation / control field A codec (23) for transmitting to the wireless communication device (21) for transmission through the wireless transmission / reception device 21, a program and file system (image, character, icon) for driving the wireless communication terminal, and a service band Screen under control of the storage device 24 storing the database, the audio output device (speaker) 25 for outputting the voice received from the codec 23, and the operation / control device 22 A display device (LCD) 26 for outputting a signal, an input device (keypad) 27 for receiving a phone number, menu selection information, etc. through a button, and a voice received and transmitted to the codec 23 Voice input device (microphone) 28, and a subscriber identity module (SIM) card 29 that stores wireless communication service provider information (MCC, MNC).

At this time, the wireless communication service provider information (MCC, MNC) includes a country code (MCC: Mobile Country Code) for identifying a country and a network code (MNC: Mobile Network Code) for identifying a wireless communication service provider. And is stored in a subscriber identity module (SIM) card 29 mounted (inserted) in the wireless communication terminal.

The storage device 24 is a non-volatile memory (NV-MEMORY), and is stored so that wireless communication service provider information (MCC, MNC) and service band values correspond to each other.

The overall operation of the present invention will be described in detail with reference to FIG. 3.

3 is a flowchart illustrating a service band search method in a wireless communication terminal according to the present invention.

First, the operation / control device 22 of the wireless communication terminal reads wireless communication service provider information (MCC, MNC) from the subscriber identity module (SIM) card 29 mounted (inserted) in the wireless communication terminal ( 301).

The service band value corresponding to the read wireless communication service provider information (MCC, MNC) is retrieved from the service band database stored in the storage device 24 (302).

The search result 302 confirms whether a service band value corresponding to the read wireless communication service provider information (MCC, MNC) exists (303), and the service corresponding to the wireless communication service provider information (MCC, MNC). If there is a band value, service band search is performed using a service band value corresponding to the wireless communication service provider information (MCC, MNC) (304). After that, if the service band search is successful, the corresponding band is set as the service band.

On the other hand, if there is no service band value corresponding to the wireless communication service provider information (MCC, MNC), as a result of the check 303, the service band search for all bands are sequentially performed as in the conventional method ( 305). As a result, when the serviceable band is found, the service band is set using the service band, and the service band database stored in the storage device 24 is upgraded (306). That is, the serviceable band searched in step 305 is stored in the service band database so as to correspond to the wireless communication service provider information (MCC, MNC).

The present invention described above is capable of various substitutions, modifications, and changes without departing from the spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by the drawings.

As described above, the present invention reads the wireless communication service provider information (MCC, MNC) from the identification module card in the wireless communication terminal, and then the wireless communication service provider information (MCC, By performing a search by selecting a service band value corresponding to the MNC), the service band can be set more quickly.

Claims (2)

In the service band search method in a wireless communication terminal, A service band database storing step of storing the wireless communication service provider information and the service band value so as to correspond to each other; A wireless communication service provider information loading step of reading wireless communication service provider information from the identification module card; A service band database searching step of searching for a service band value corresponding to the read wireless communication service provider information from the service band database; A first service band search step of searching for a service band using the service band value if a service band value corresponding to the wireless communication service provider information exists as a result of the search; And A second service band search step of searching for a service band for all bands when there is no service band value corresponding to the wireless communication service provider information as a result of the search; Service band search method in a wireless communication terminal comprising a. The method of claim 1, A service band database updating step of storing a service band value obtained as a result of performing a service band search for all bands in the service band database so as to correspond to the wireless service provider information; Service band search method in a wireless communication terminal further comprising.

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