KR20040058422A - Method for using main services of phone as failing registration of mobile phone - Google Patents

Abstract

PURPOSE: A method for maintaining main functions of a phone while a mobile communication terminal fails in a registration is provided to differentiate an SIM message from an existing specification even though a GPRS(General Packet Raido Service) fails in a registration and to periodically transmit a routing area update request to a network. CONSTITUTION: If a terminal(10) transmits a location area update request message(301), a network(20) transmits a location area update accept message(302). If the terminal(10) transmits a routing area update request message(303), the network(20) transmits a routing area update accept message(304). The terminal(10) attempts a call(305), and the network(20) completes the call(306). If the terminal transmits a general location area update request message(307), the network(20) transmits a general location area update accept message(308). If the terminal(10) transmits a routing area update request message(309), the network(20) transmits a routing area update accept message(310). A GSM service is normally performed(311). Parameters of a GPRS are deleted(312), and a routing area timer is started(313). The routing area timer is completed(314), and a routing area update request is repeatedly carried out(315).

Description

Method for using main services of phone as failing registration of mobile phone}

The present invention relates to a method of maintaining the main function of GSM to provide the important services of the phone when the GPRS registration rejection of the mobile communication terminal, in particular, using both the CS (Circuit Switch) and PS (Packet Switch) method How to maintain the main functions of the phone when the registration failure of the mobile communication terminal to use the GSM function, which is the main service function of the phone service, even if the registration of the GPRS is rejected due to the failure of the registration of the PS type GPRS in the GSM / GPRS type terminal It is about.

In the case of Global Systems for Mobile communication (GSM), which is commercially available as a second generation mobile communication system in Europe, and General Packet Radio Service (GPRS), which is commercially available as a 2.5 generation mobile communication system, user authentication and encryption procedures are used.

In the user authentication and encryption process, whenever the power of the mobile communication terminal is turned on, the terminal must unconditionally register the user's intention to use the terminal in the network.

This registration procedure operation is the main function that the GSM terminal performs as an initial operation.

The registration procedure includes an attach registration procedure, a location area update registration procedure, and a routing area update registration procedure.

While going through the above registration process, the network undergoes user authentication and encryption if necessary.

By performing the user authentication and encryption process on the network as described above, when a mobile station (MS) requests registration on the network, an authentication procedure (Authentication) confirms whether the corresponding terminal is an authenticated terminal on the network, and the terminal and the network. It goes through a ciphering process that decides whether to encrypt the data transmitted between them.

The authentication procedure and encryption procedure as described above may be referred to as a procedure for preventing the case of eavesdropping and exploitation of the transmitted wireless voice or wireless data by others.

If the encryption is decided through the encryption process between the terminal and the network, the data transmitted between each other is encrypted with the promise of each other.

There are two ways to decide whether or not to encrypt this.

The first is due to the process occurring during the process of registering to the network by the GSM method after the terminal is powered on.

Secondly, the first operation is performed by the GPRS method when receiving a service such as SMS.

Speaking of the specific service, a voice call for voice call, a short message service (SMS) for short message transmission, a supplementary service (SS), and a PDP context activation (Packet Data Protocol Context Activation) for GPRS packet transmission Etc. belong to this.

In the above case, if the data transmission process is not promised between the terminal and the network, that is, even if the data is transmitted without encryption because no encryption procedure is performed during network registration, the data is encrypted and encrypted by the network at the time of service. Related procedures can be made.

In this case, the terminal and the network encrypt data transmitted from this point and then transmit the data.

In the transmission data encryption technique of the GSM mobile communication terminal as described above, a general schematic system configuration is as shown in FIG.

In FIG. 1, a mobile communication terminal 10 commonly used by a user is provided, and there are a plurality of base stations 11 that exchange voice and data with the terminal 10, and collectively control a plurality of base stations 11. There is a base station controller 12, which consists of a switching device 13 connected to the base station controller 12.

The exchange device 13 may be represented by a mobile switching center (MSC) in the case of GSM, which is the existing second generation service, and may be represented by a serving GPRS support node (SGSN) in the case of GPRS, which is a 2.5 generation service.

In the GSM mobile communication system of the above two methods, and registered in the network through the Location Area Update (GSM) procedure of the GSM (Combined Routing Area Update) at the time of combined Routing Area Update (GPS) In the case of GPRS, a route region update procedure is performed.

At this time, if the combined route region update process transmitted from the terminal to the network is not approved in the network, the route region update rejection message indicating that the route region update cannot be transmitted is sent to the terminal.

When the terminal receives the update rejection message from the network, the terminal deletes all registration parameter variables such as an encryption procedure and a key number.

In this case, the GPRS service as well as the GPRS service will be unavailable until the terminal power is turned off or the SIM is unblocked.

If the SIM is erased, if there is a mistake in GPRS approval after CS registration, there is a problem that no service such as the main function service of GSM is received while rejecting the use of the main function of GSM.

In addition, after the data service call is blocked, a routing area update registration procedure must be performed. In this case, an encryption procedure and an authentication procedure are performed to approve the route area update registration procedure. You will be rejected by.

For example, if the user terminal receives a rejection message from the network such as the terminal unavailable or GPRS service unavailable or the GPRS service unavailable or the GSM main service cannot be used, the user terminal is disabled until the terminal is reinitialized. there is a problem.

Therefore, the present invention has been proposed to solve the above-mentioned problems, and even if the CS is blocked due to the registration failure during registration of the PS method in the terminal using both the GSM method and the GPRS of the PS method, The purpose of the present invention is to provide a method for maintaining the main functions of a phone when the registration of a mobile communication terminal for using a service function fails.

In order to achieve the above object, when the GPRS registration is rejected when using the terminal of the GSM / GPRS, the terminal and the network request the main region of the GSM to receive the main function services other than the GPRS. Function processing steps,

A GPRS route region update processing step of requesting, approving, and processing a GPRS route region update after the main function service location region update process of the GSM;

A user location area update processing step of processing a call request for service after the GPRS path area update process and requesting and approving an update of a location area to receive important data service;

And a user route region update processing step of requesting and approving an update of the route region to which an important service is exchanged after the update of the user location region.

The critical service location area update processing step uses IMSI approved in a normal state,

Even if GPRS registration is rejected in the user path region update processing step, the transmission parameters are maintained as valid.

After the user route region update processing step, a route region timer for a user data service is set.

The user route region update process may be repeatedly executed for a predetermined time set in a timer.

Ensure that critical services maintain data for registration on the network.

1 is a schematic schematic system diagram of a GPRS mobile communication system.

Figure 2 is a flow chart showing a registration rejection process of GPRS to which the present invention is applied.

Figure 3 is a flow chart showing the important service available processing of the phone when the GPRS registration rejection of the present invention.

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

2 is a flowchart illustrating an operation flow between a terminal and a network of the present invention. When a user who uses mobile communication turns on the terminal 10, the terminal 10 requests a network 20 to register. Done.

The mobile communication terminal 10 transmits a location area registration request message 202 to the base station 11 of the network 20 via wireless, and the base station 11 transmits the location area registration request message ( 202 is transmitted to the exchange apparatus 13 through the base station controller 12.

The network 20 receives the location area registration request message 202 from the terminal 10 to determine whether to use encryption, and when it is determined that encryption is used, an encryption authorization request message (Authentication and Ciphering Request) ( 203 is transmitted to the terminal 10.

The terminal 10 transmits, to the network 20, an authentication and ciphering response 204 appropriate to the encryption approval request message 203 received from the network 20.

The network 20 receives the encryption approval response message 204 from the terminal 10 and then sends a location area registration completion message 205 indicating that the registration procedure is completed to the terminal 10. 10) the initial process for encryption between the network 20 is complete.

As described above, when the initial process between the terminal 10 and the network 20 is completed, the terminal 10 may request a service call from the network 20 at any time thereafter.

Thus, when the terminal 10 requests 206 a data service call to the network 20 to perform wireless communication from now on, an immediate connection 207 is established.

When a connection 207 to the data service call is made, a service call is initiated (Call Clearing) 208.

After the service call is initialized 208, the user who wants to provide wireless mobile communication data service sends a user location area registration request message to the network to notify the network of his current location area information. A user location area registration process (209) is performed to transmit a location area registration approval message to the terminal to receive and approve the message.

When the user location area registration process 209 is completed, the terminal transmits a user route area registration request message 210 to register a routing area for using a data service to the network.

The network receives the user route region registration request message 210 from the terminal and determines in the route region determination step 211 whether to approve or reject it.

If the route region registration request is rejected as a result of the determination of the route region determination step 211, the SIM is disabled (213) due to the reason of the rejection, that is, the reason 212 such as illegal terminal use or GPRS service failure. The service is limited (214) because it is in a closed state.

As a result of the determination of the route region determination step 211, if the route region registration request is approved, the use of a predetermined service is possible (215), and upon completion of the service, the terminal enters the standby state 216.

If the registration is rejected at the time of GPRS registration as described above, in addition to the GPRS packet data call service, various other important functions of GSM are denied to be used. As it does not affect at all.

In FIG. 3, the terminal 10 sends a location update request message 301 of GSM to the network 20, and the network receives the process and sends a location update update message 302 of the GSM to the terminal.

The process of updating the location area of the GSM between the terminal 10 and the network 20 is subjected to an approved IMSI (International Mobile Station Identity) process in a normal state.

After the location area update process of GSM is performed between the terminal 10 and the network 20, the terminal 10 sends a GPRS routing area update request message 303 to the network 20. After receiving this process, the GPRS routing area update accept message 304 is transmitted to the terminal.

The GPRS path region update process between the terminal 10 and the network 20 goes through an approved GPRS process.

After undergoing a GPRS path region update process between the terminal 10 and the network 20, the terminal 10 attempts a call to the network 20 (305), and then the network processes the call and terminates (306). )

After the call is terminated 306, the terminal 10 sends a normal location area update request message 307 to the network 20, and the network receives and processes the normal location area update approval message 308 to the terminal. do.

Then, the terminal 10 sends a route region update request message 309 to the network 20, and the network receives the process and transmits a route region update approval message 310 to the terminal.

The process of updating the route area between the terminal 10 and the network 20 is a process for handling an error caused by illegal use of the terminal.

After completing the route region update process between the terminal 10 and the network 20, the GPRS service is stopped and the GSM service is normally performed (311).

Among the various transmission parameters of the terminal, the parameters of the GPRS are deleted (312) and the route area timer is started (313) to operate for a predetermined time (for example, 500 seconds) after the route area timer ends (314). The loop process in which the update request 315 is repeatedly performed continues.

If the above process is followed, SIM remains valid even when GPRS route region update is rejected, thereby enabling the use of GSM's main function services and denying only the GPRS packet data service.

The terminal periodically sends the path region update request to the network to maintain the data for the main function of GSM to be normally registered in the network.

As described above, the present invention has a useful effect that does not affect the use of the main functions of the GSM at all, even if the registration of GPRS fails, the SIM message is different from the existing specification and periodically sends a route region update request to the network. To provide.

Claims (5)

When GPRS registration is rejected when using GSM / GPRS terminal, the terminal and network process the main function of GSM to request, approve and process location area update to receive the main function service of GSM other than GPRS; A GPRS route region update processing step of requesting, approving, and processing a GPRS route region update after the main function service location region update process of the GSM; A user location area update processing step of processing a call request for service after the GPRS path area update process and requesting and approving a location area to receive important data service; And a user route region update processing step of updating and requesting and approving a route region for sending and receiving an important service after updating the user location region. The method according to claim 1, The service location area update processing step is to maintain the main function of the phone when the registration failure of the mobile communication terminal, characterized in that using the approved IMSI in a normal state. The method according to claim 1, If the registration of the GPRS is rejected in the user path region update processing step, the transmission parameters are maintained to be effective, the method of maintaining the main function of the phone when the registration failure of the mobile communication terminal. The method according to claim 1, And a path area timer for user service after the user path area update processing step. The method according to claim 1 or 4, The user route region update process may be repeatedly executed for a predetermined time set in a timer. Method of maintaining the main function of the phone when the registration failure of the mobile communication terminal characterized in that the important service to maintain the data for registration in the network.