KR20000039226A - Service searching method of mobile phone in roaming - Google Patents

Abstract

PURPOSE: A service searching method of a mobile phone in roaming is provided to restrict a mobile communication service for a mobile phone in case that the mobile phone is in an unregistered service area. CONSTITUTION: A home location register searches a geographic authorization table according to a geographic authorization service of a mobile phone by using a system ID, a mobile switching center ID and a location authorization ID of the mobile phone. Upon searching the table, in case that it is an authorized area for all service provider/a corresponding service provider/a corresponding mobile switching center/a corresponding location, it is judged whether a geographic authorization parameter is requested. If the geographic authorization parameter is requested, the geographic authorization searching result and the home service searching result are matched to be identical. According to the geographic authorization table searching result, in case that it is a service available area, the home location register searches the home service table. Upon searching the home service table, in case that it is a service available area, or in case that it is an authorized area for all service provider/a corresponding service provider/a corresponding mobile switching center/a corresponding location, it returns to the judging step in which a geographic authorization parameter is judged to be requested, Meanwhile, upon searching the home service table, in case that it is not a service area, a service for the mobile phone is restricted.

Description

How to search for service of roaming mobile phone

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cellular mobile telecommunication system. In particular, the present invention relates to a roaming mobile telephone for limiting a mobile communication service provided to a mobile telephone in a non-registered service area. It relates to a service search method of.

The cellular mobile communication system divides the entire service area into a plurality of base station areas to form cells, which are small service areas, and centrally controls these base stations with a mobile switching center (MSC). This allows the subscriber to continue the call while moving from cell to cell. The cellular system allows the call to be continued by the handoff function when the mobile phone leaves the cell of one base station and enters a new cell.

The subscriber of the mobile phone first registers his information in the Home Location Register of the Home MSC. The state of a mobile phone moving out of the home mobile switching center area to another mobile switching area is called roaming, and the roaming mobile phone is a system that automatically identifies the mobile phone information, that is, the mobile operator, to the mobile switching center. Register an ID (System ID: SID) and a mobile phone ID (Mobile ID: MID or International Mobile Station ID: IMSI) that distinguish the mobile phone.

The mobile switching center determines if a mobile telephone that has entered its area is registered in its home location register, and if not, the mobile switching center notifies the mobile switching center of the location information of the mobile telephone. It receives various information and stores it in the Visitor Location Register (VLR).

An operator operating a communication network by a cellular system provides a roaming service of an extended meaning, allowing a mobile phone registered in its communication network to receive a mobile communication service even in a communication network operated by another operator. . Therefore, home locator provides Geographic Authorization service that registers service provision area by subscriber. This service registers service areas, sets Geographic Authorization Parameters, and selects Tolerance Limits for application outside the service area, by selecting the Tolerance Limit. Restrict incoming calls.

The home location register according to the prior art provides the local authentication service according to the local authentication parameter and the subscriber's profile. This is because the purpose of the local authentication service is to set an origination indicator and an incoming call to set up the local authentication parameter and prohibit incoming / outgoing calls. This is because the mobile switching center is restricted by the setting of the termination restriction code.

The mobile phone is a mobile switching center, which includes a location registration (REG), a Qualification Directive (QUD), or a Qualification Request, including the mobile phone's SID, MSCID, and Location Authorization ID (LAID). request: QUL), the visitor locator of the mobile switching center sends a message to the home locator, including various information (SID, MIN, MSCID, LAID) included in the message received from the mobile telephone, to the service information of the mobile telephone. Search for. The home locator retrieves information about the service of the mobile phone and retrieves the area for local authentication of the mobile phone.

1 is a flowchart illustrating a service searching method of a home location register according to the prior art. When the visitor locator receives REG, QUD, QUL messages from the mobile phone, it requests a search from the home locator. If the MSCID is included in the message (REG, QUL) received from the mobile phone through the visitor location register (s102), the home location register checks whether the local authentication service of the mobile phone subscriber is activated (s104). If is not activated, the local authentication service is not used and is set in the parameter (s106) to deliver a message to the mobile phone through the visitor locator.

If the local authentication service is activated in step S104, the local authentication (GA) table of the mobile phone is searched using the SID, MSCID and LAID received from the mobile phone. (S108) Only the SID of the search result is registered in the table. If the same value is matched (s110), it is determined that all the service areas of the service provider corresponding to the SID are available, and the local authentication search result (GeoAuth) is updated as follows (s112).

GeoAuth = ThisMarketID

If the MSCID consisting of the search result SID and the switch number SWNO (SWNO) of the mobile switching center matches the value registered in the table in step S108 (s114), service is possible for all service areas of the switch number. In response to the determination, the local certification search result is updated as follows (s116).

GeoAuth = ThisSWNO

If the search result SID and the LAID match the values registered in the table at step S108 (s118), it is determined that both the service area of the LAID is available, and the local authentication search result is updated as follows. )

GeoAuth = ThisLAID

If there is no region registered as a result of the search in step S108 (s122), it is determined that the service is available for all service areas, and the result of the regional authentication search is updated as follows.

GeoAuth = ALLMarketID

If there is no region matching the search result in step s108 (s126), it is determined that the mobile phone is in the out-of-service area, and the local authentication search result is updated to GeoAuth = NotAuth, and the local authentication limit value for calling / receiving restriction (GA Tolerance). Limit) is put on the message to be answered by the mobile phone (s128).

In step s102, if the MSQID is not included in the message QUL received from the mobile phone, the previously searched result is used. (S130) The home locator retrieves the local authentication search result (GeoAuth) from the local authentication table. (S132)

If the local authentication search result in the out-of-service area in step (s132) (s134), the local authentication allowance value for incoming / outgoing call restriction is put on the message to be answered by the mobile phone (s136), and the existing local authentication search result is added to the message. (S142) If the local authentication search result is ALLMarketID, ThisMarketID, ThisSWNO, or ThisLAID (s138), or if the service is allowed in all regions (s140), the existing local authentication search result is answered by the mobile phone. Put on the message. (S142)

If the local location search result is not out of service (NotAuth), the home location register sends the local authentication search result to the visitor location register as it is in the local authentication parameter, and in the case of the out of service area, the local authentication allowance value. Control the parameters accordingly. If the local authentication limit is Npermission, the value of the local authentication parameter is out of service (NotAuth), and the originating caller (OI) and the call restriction code (TD) are denied to prevent incoming / outgoing calls. To send. If outgoing or incoming calls are allowed, the local authentication parameter is ThisLAIDAuth for minimal local permission, and the value of the calling indicator and call restriction code parameter is sent to the visitor locator depending on each permission.

In the conventional mobile phone service search method of a home location register operating as described above, a service according to a region by transmitting a parameter to a home location register to control the origination / reception of a mobile phone according to a local authentication search result. Control of the mobile switching center. Therefore, the service search method according to the prior art has a lot of influences on the operation of the mobile switching center, and there is a problem that the outgoing service has a limit in the outgoing / incoming control. In addition, only two restriction methods could be provided, called and incoming, and because they were used for regional restrictions by subscribers, all subscribers requiring local service restrictions had to register the service and register the area. In other words, there is a problem in that the area authentication table having the same value must be managed separately for the same subscriber.

Accordingly, an object of the present invention, which was devised to solve the problems of the prior art operating as described above, defines a range of a mobile telephone number (MIN) of a mobile phone so as to register an area for each MIN area and apply the same restriction. It is to provide a service searching method of a roaming mobile phone, which is a service and a local authentication service.

1 is a flowchart illustrating a service searching method of a home location register according to the prior art.

2 is a flowchart illustrating a service searching method of a home location register according to the present invention;

3 is a flowchart showing a service restriction method according to the present invention;

4 is a subscriber table for local authentication and home service.

5 is a table for subscriber-specific regional authentication registration area information.

6 is a table for applying a home service for each telephone number (MIN) area.

7 is a table for service area information for each home area.

A preferred embodiment of a service searching method of a roaming mobile phone according to the present invention, which was created to achieve the above object,

Receiving a request for retrieving service information of the mobile telephone from the visitor locator;

Confirming whether a mobile switching center ID (MSCID) has been transmitted from the visitor locator;

If the MSCID has been transmitted from the visitor locator, checking whether a geographic authorization service is activated;

If the local authentication service is activated, searching for a local authentication table using an MSCID and a location authorization ID (LAID) received from the mobile phone;

Storing a local authentication table search result;

Setting the area authentication service not to be used in a response message to be sent to the mobile phone if the area authentication service is not activated, and confirming that the mobile phone number (MIN) has a home service area;

Setting home service not used for a response message to be sent to the mobile phone if the MIN of the mobile phone does not have a home service area;

Retrieving a home service table using the MSCID and LAID received from the mobile phone if the MIN of the mobile phone has a home service area;

Storing a home service table search result;

Retrieving pre-stored local authentication search results if the MSCID has not been transmitted from the visitor locator;

Setting service restriction parameters in a response message to be sent to the mobile phone if the search result is out of service area;

Searching for a home service search result if the search result service area is available;

Setting a local authentication or home service search result in a response message to be sent to the mobile telephone.

A preferred embodiment of the service searching method of a roaming mobile phone according to the present invention,

A home location register searching the area authentication table by the area authentication service of the mobile phone using the SID of the mobile phone and the MSCID and LAID;

Determining whether the local authentication parameter is required when the local authentication table search result is an area that is authenticated for all operators / applicants / applicable mobile switching centers / applicable locations;

Matching a local authentication search result with a home service search result if a local authentication parameter is required;

Limiting service of the mobile telephone when the area authentication table search result is a serviceable area;

Searching for a home service table by the home location register when the local authentication table search result is a serviceable area;

Returning to a step of determining whether a local authentication parameter is required if the home service table search result is a serviceable area or if the home service table is a serviceable area, or if the service area is authenticated with respect to all operators / applicants / applicable mobile switching centers / applicable locations; And

Limiting service of the mobile telephone when the home service table search result is out of service.

Hereinafter, with reference to the accompanying drawings will be described in detail the operating principle of the preferred embodiment of the present invention.

The present invention combines a home service with a local authentication service. Home service classifies the service area of mobile phone by MIN. Therefore, the home location registration system first retrieves the service information of the mobile phone from the local authentication table, and then retrieves the service information of the mobile phone from the home service table again if the mobile phone is available in all areas.

In addition, the present invention limits the service range of the mobile telephone in various ways. The home location register according to the present invention prohibits the incoming or outgoing of the mobile phone, prohibits outgoing service, prohibits the service for a certain time, restricts the incoming / outgoing of the mobile phone by personal number and password, or The visitor locator allows the service to be restricted, limited by additional services, or by the search results and roaming status.

2 is a flowchart illustrating a service searching method of a home location register according to the present invention. When the visitor locator receives REG, QUD, QUL messages from the mobile phone, it requests a search from the home locator. If the MSCID is included in the message (REG, QUL) received from the mobile phone through the visitor location register (s202), the home location register checks whether the local authentication service of the mobile phone subscriber is activated (s204).

If the local authentication service is activated in step s204, the local authentication (GA) table of the mobile phone is searched using the MSCID and LAID received from the mobile phone. (S206) Only the SID of the search result is registered in the local authentication table. If the same value is matched (s208), it is determined that all the service areas of the service provider corresponding to the SID are available, and the local authentication search result is updated as follows (s210).

GeoAuth = ThisMarketID

If the search result MSCID (SID + SWNO) matches the value registered in the local authentication table in step s206 (s212), it is determined that all the service areas of the mobile switching center switch number are available, and the local authentication search result is determined. Update as follows (s214).

GeoAuth = ThisSWNO

If the search result SID and the LAID match the values registered in the area authentication table in step s206 (s216), it is determined that all the service areas of the LAID are available, and the area authentication search result is updated as follows. (s218)

GeoAuth = ThisLAID

If there is no region registered as a result of the search in step s206 (s220), it is determined that the service is available for all service areas, and the local authentication search result is updated as follows (s222).

GeoAuth = ALLMarketID

If there is no region matching the search result in step s206 (s224), it is determined that the mobile phone is in the out-of-service area, and the local authentication search result is updated to GeoAuth = NotAuth, and the service restriction related parameters (sending, incoming, rejecting, personal Number confirmation service, password call service) is put on the message to be answered by the mobile phone (s226).

If the local authentication service is not activated in step s204, the home location register sets the parameter of the response message that the local authentication service is not in use (s228) and checks whether the MIN of the mobile phone has the home service area. (S230) If the MIN of the mobile telephone does not have a home service area, it sets the response parameter that home service is not in use (s232) and sends a response message to the visitor locator.

If the MIN of the mobile phone has the home service area in step S230, the home location register retrieves the service information of the mobile phone from the home service (HA) table using the MSCID and the LAID (s234). If only matches the value registered in the home service table (s208), it is determined that the service is available to all service areas of the service provider corresponding to the SID, and the home service search result (RoamGeoAuth) is updated as follows.

RoamGeoAuth = ThisMarketID

If the search result MSCID matches the value registered in the home service table in step s206 (s212), it is determined that all the service areas of the mobile switching center switch number are available, and the home service search result is updated as follows. (s214)

RoamGeoAuth = ThisSWNO

If the search result SID and the LAID match the values registered in the home service table in step s206 (s216), it is determined that both the service area of the LAID is available and the home service search result is updated as follows. (s218)

RoamGeoAuth = ThisLAID

If there is no region registered as a result of the search in step s206 (s220), it is determined that the service is available for all service areas, and the home service search result is updated as follows (s222).

RoamGeoAuth = ALLMarketID

If there is no region matching the search result in step s206 (s224), it is determined that the mobile phone is in an out-of-service area, and the home service search result is updated to RoamGeoAuth = NotAuth, and the service restriction related parameters (sending, incoming, rejecting, personal Number confirmation service, password call service) is put on the message to be answered by the mobile phone (s226).

In step s202, if the MSQID is not included in the message QUL received from the mobile phone, the previously searched result is used. (S236) First, the home location register obtains the local authentication result (GeoAuth) from the local authentication table. Search (s238)

If the local authentication search result in the out-of-service area in step (s238) (s240), the service restriction parameter is loaded into the message to be answered by the mobile phone (s242), and the existing local authentication search result is loaded into the message (s250). In S238, if the local certification search result is ALLMarketID, ThisMarketID, ThisSWNO, or ThisLAID (s244), the existing local certification search result is put in a message to be answered by the mobile phone (s250).

If the local authentication search result is available for all areas in step (s238), the home location register searches for the home service search result again. (S248) If the home service search result is out of service area (s240), service restriction The parameter is loaded into the message to be answered by the mobile phone (s242), and the existing home service search result is loaded into the message (s250). In step s248, the home service search result is ALLMarketID, ThisMarketID, ThisSWNO or ThisLAID (s244), If service is available for all areas, the home location register loads the existing home service search result in a message to be answered by the mobile phone (s250).

In the case where the location of the mobile phone is determined to be out of service by the area authentication table and the home service table in step s226 or step s242, a method for limiting the service may include calling, incoming, authentication rejection, and personal number verification. Services (Subscriber Personal Identification Number Intercept (SPINI)), password call service (PCA). 3 is a flowchart illustrating a service restriction method according to the present invention.

If the area is authenticated to all operators / applicants / applicable mobile switching centers / appropriate locations by the local authentication service in step s302, (s304), the home location register determines whether a local authentication parameter is required (s306). If the parameter is required, the local certification search result matches the home service search result (s308).

In the case of the serviceable area by the local authentication service in step s302, (s310), the home location register searches the home service search result. (S312) In the case of the serviceable area by the home service (s314), or If the home service is the authorized area for all operators / applicants / applicable mobile switching centers / applicable locations (s316), the process returns to step s306.

If it is the out-of-service area by the home service in step S312 (s318) or when it is the out-of-service area by the local authentication service in step s302 (s332), the home location register restricts the service of the mobile telephone.

For the service restriction, the home location register checks whether a parameter for service restriction is required (s320), and if required, puts the parameter as a parameter for home service or local authentication service restriction in a message (s322).

Among the service restriction parameters, the originating indicator (OI) restricts the origination, the incoming call restriction code (TD) restricts the incoming call, and the authentication period controls how often the mobile phone should authenticate for service permission from the home service system. . The home location register provides the service only until the service certification period, and periodically requests authentication of the service, and determines whether to allow the service in the next cycle according to the result of the re-authentication.

The DeAuthorization Period indicates the period during which the mobile phone must obtain service authentication from the home service system after the service is prohibited, including the authentication deny parameter, and the home service system prohibits the service until the reauthentication succeeds.

The home location register determines whether the service restriction is required by the SPINI (s324), and if the service restriction is necessary, performs the SPINI for restricting the home service or the local authentication service. (S326) The SPINI service is the SPINI Personal Identification Number. : It is used with PIN) and SPINI trigger. If the calling subscriber is located in the out-of-service area, the calling party receives the personal number from the caller and only allows the calling service if the personal number matches.

In addition, if it is determined that the service location limitation by the PCA is necessary (s328), the home location register performs a PCA for home service or local authentication service restriction (s330). The PCA service is used together with a password (PWD) and is called. When the subscriber is located in the out-of-service area, the incoming service is allowed only when the password is input from the calling subscriber.

This restriction parameter is stored in the local authentication table for local authentication and in the home service table for home service, and exists as a different item from the actual subscriber parameter. That is, if a subscriber is located in a serviceable area, the service is generally provided by using a subscriber parameter for application, and in the case of an out-of-service area by a local authentication service, the service may be used by using local authentication related parameters. In the case of the non-service area by the home service, the service is restricted by using the roaming related parameters stored in the home service table of the corresponding home ID.

4 shows the items of the subscriber information table for local authentication and home service, where GEO AUTH shows the subscriber's local authentication search result, and GA_FLINDEX is an index for searching the local authentication area table for each local certification registered operator, and GNA OI GNA TC, GNA AUTH PRD, GNA AUTH PRDVAL, GNA DEAUTH PRD, GNA DEAUTH PRDVAL, GNA SPINI, GNA SPINI TRG, GNA PIN, GNA PCA, GNA PWD are the values applied for service restriction by local certification. HOMEID is the ID of the home service system in which the subscriber is registered, and ROAMING STATE indicates the location of the subscriber by searching the home service system.

FIG. 5 shows a table for subscriber-specific regional authentication registration area information. The subscriber information of FIG. 4 is connected through GA_INDEX. GeoAuthArea is classified by SID, SWNO, and LAID.

FIG. 6 shows a table for applying a home service for each MIN area, which is connected to subscriber information of FIG. 4 through a HOMEID. MIN RANGE and MAX RANGE represent the range of MIN to distinguish MIN area. , ROAMING PCA and ROAMING PWD are the values that are applied when the service is restricted by the home service system. HA_FLINDEX is an index for searching a home service system by HOME ID.

7 is a table for service area information for each home area, and the home service area information table is connected to HA_INDEX of FIG. 6. The home area is also divided into SID, SWNO, and LAID.

Hereinafter, a service method of a mobile telephone to which the present invention is applied will be described in detail with reference to embodiments.

If the area where the mobile phone is located is an out-of-service area by local authentication or home service system search, the home location register restricts the service of the mobile phone. In the case of non-service area by local certification, the selected service restriction method is applied while registering the area certification, and in the case of non-service area by home service system, the selected service restriction method is applied while registering MIN area for the home service system. do. To do this, call restriction code, originator, Authorization Denied, Authorization Period, Denied Authorization Period, Personal Number Verification Service (SPINI), Personal Number Verification Service Trigger (SPINI Triggers), Set Origin Triggers and Local Authentication parameters to the registered values and send them to the Visitor Locator, and change the status of the service-related subscribers.

When a call-allowed mobile phone reaches a mobile phone in an out-of-service area, if the called party's mobile phone previously stored in the database when searching for a local authentication or home service system, the incoming call is stored. If the subscriber is prohibited from receiving by local authentication and home service, the home location register sets the access denied reason to do not receive and restricts the incoming call. If the called party is registered to be restricted through PCA service when roaming, ask the caller for the password of the connecting roaming party for connection, and if the incoming call matches, the caller connects. .

If the visitor locator of the mobile switching center requires the subscriber's profile while processing the call and requests the subscriber's profile from the home locator, if there is an MSCID in the QUL message, then the received MSCID is used to provide the local authentication service and home. Search for a service. If the location is not registered by the local authentication service or home service, the home location register registers the call restriction code and the originating caller, the authentication rejection, the authentication cycle, the authentication rejection cycle, the personal number, the personal number verification service trigger, the origination trigger, and the local authentication. Respond to the mobile phone with an Ack message that sets a parameter or the like to a value registered for restriction. At this time, the subscriber's information is not changed. If there is no MSCID, the previous subscriber status is retrieved from the database and the service restriction parameter is set in the case of a service limited area.

If service restrictions by SPINI are required for subscribers in the out-of-service area, i.e., the mobile switching center is unable to provide personal identification verification services, the mobile switching center will receive trigger information previously received from the home location register when the mobile telephone makes an outgoing call. Send to home locator using (SPINI Triggers). When the home location register searches for the subscriber's information and determines that the subscriber is roaming and restricts the service to the SPINI, the home location register requests a personal number for providing the service when roaming to the mobile phone through the RUI. When the mobile phone enters a number, the home locator compares the entered number with the personal number, provides a service if it matches, and restricts the service using a reason for access denial if it does not match.

If a local SPINI is provided by the mobile switching center for the roaming mobile telephone, the mobile switching center will use the SPINI trigger and personal number of the subscriber information previously received from the home location register to determine if the mobile telephone attempted to make a job call. I believe that I have joined. The mobile switching center requests a personal number from the mobile telephone, and compares the input number with the personal number received from the home location register and permits the call if it does not match. In the above two cases, the trigger and the personal number for the personal number verification service are values applied when roaming.

If the subscriber's information has changed and needs to send the QUD to the visitor locator, the home locator keeps track of the subscriber's location. If it is determined that the subscriber's location is roaming, the home location register sends values for service restriction in the relevant profile information parameter.

If a Transfer To Number request is made to obtain a transfer number for the called party after the incoming call fails, the home locator retrieves the previous location information, and the state of the mobile phone is roaming. If the call is received, the incoming call is prohibited.

For this operation, the home location register registers a home service range for each MIN area and restricts the service out of the service area for each home (calling indicator, call restriction code, authentication cycle, authentication value, authentication rejection cycle, authentication). Rejection value, personal number verification service, personal number, PCA, password) and home service area should be registered, and new information should be able to apply not only the information but also subscriber information when it is changed. It should be able to save the service information and the subscriber's status accordingly, search the area and status, and limit the service according to the search result and registration service restriction information.

Regional certification services that can restrict service areas for individual subscribers are the same as home services except that they are applied on a per subscriber basis. If home service and regional certification service overlap, regional certification service is applied first.

The present invention can be variously modified and can take various forms and only the specific embodiments thereof are described in the detailed description of the invention. It is to be understood, however, that the present invention is not limited to the specific forms mentioned in the detailed description of the invention, but rather includes all modifications, equivalents, and substitutions within the spirit and scope of the invention as defined by the appended claims. It should be understood to do.

In the present invention operating as described in detail above, the effects obtained by the representative ones of the disclosed inventions will be briefly described as follows.

The present invention uses a home service system that is generally applicable to all subscribers by phone number (MIN) area to register areas by MIN area and apply the same service restriction, and the area authentication service is a service area on a subscriber basis. This has the effect of defining a service for. In addition, for mobile phones that are determined to be roaming by a home service system or a local authentication service, the user may not only receive / receive calls, but also may refuse authentication for a certain period of time, or may apply SPIN or password call service (PCA). By doing so, more various service restriction methods can be applied.

Claims (6)

Receiving a request for retrieving service information of the mobile telephone from the visitor locator; Confirming whether a mobile switching center ID (MSCID) has been transmitted from the visitor locator; If the MSCID has been transmitted from the visitor locator, checking whether a geographic authorization service is activated; If the local authentication service is activated, searching for a local authentication table using an MSCID and a location authorization ID (LAID) received from the mobile phone; Storing a local authentication table search result; Setting the area authentication service not to be used in a response message to be sent to the mobile phone if the area authentication service is not activated, and confirming that the mobile phone number (MIN) has a home service area; Setting home service not used for a response message to be sent to the mobile phone if the MIN of the mobile phone does not have a home service area; Retrieving a home service table using the MSCID and LAID received from the mobile phone if the MIN of the mobile phone has a home service area; Storing a home service table search result; Retrieving pre-stored local authentication search results if the MSCID has not been transmitted from the visitor locator; Setting service restriction parameters in a response message to be sent to the mobile phone if the search result is out of service area; Searching for a home service search result if the search result service area is available; Setting a local authentication or home service search result in a response message to be sent to the mobile phone. A home location register searching the area authentication table by the area authentication service of the mobile phone using the SID of the mobile phone and the MSCID and LAID; Determining whether the local authentication parameter is required when the local authentication table search result is an area that is authenticated for all operators / applicants / applicable mobile switching centers / applicable locations; Matching a local authentication search result with a home service search result if a local authentication parameter is required; Limiting service of the mobile telephone when the area authentication table search result is a serviceable area; Searching for a home service table by the home location register when the local authentication table search result is a serviceable area; Returning to a step of determining whether a local authentication parameter is required if the home service table search result is a serviceable area or if the home service table is a serviceable area, or if the service area is authenticated with respect to all operators / applicants / applicable mobile switching centers / applicable locations; And A home service table search result, if the service area is out of service, including the step of limiting the service of the mobile telephone, the service searching method of the roaming mobile telephone. The method of claim 2, wherein limiting the service comprises: Confirming whether a parameter for service restriction is required; If a parameter for service restriction is required, setting, by the home locator, the parameter as a parameter for home service or local authentication service restriction in a response message to be sent to the mobile telephone; If service restriction is required by the personal number verification service (SPINI), performing a SPINI for home service or local authentication service restriction; And If the service restriction is required by the password calling service (PCA), performing a PCA for home service or local authentication service restriction, the service search method of a roaming mobile phone. The method of claim 3, wherein the service restriction parameter, An origination indicator (OI) for limiting the origination of the mobile telephone; Call restriction code (TD) to limit incoming calls; An authentication period for controlling a period during which the mobile telephone should authenticate for service permission from a home service system; And A service retrieval method for roaming mobile phones, comprising a DeAuthorization Period for controlling a period during which the mobile phone should obtain service authentication from a home service system after service is prohibited. The method of claim 3, wherein the SPINI, Used by SPINI Personal Identification Number (PIN) and SPINI trigger, roaming to receive outgoing personal information from caller when outgoing subscriber is located in out-of-service area, and to allow outgoing service only when personal number matches How do I search for services on my mobile phone? The method of claim 3, wherein the PCA, A service search method of a roaming mobile phone, which is used by a password (PWD), and permits an incoming service only when a matching password is received from an outgoing subscriber when the called subscriber is located in an out-of-service area.