KR20090112668A - Call transferring association method - Google Patents

Abstract

A call transferring association method is disclosed in the present invention, which includes: in the first step, a terminal receives a command inputting by the terminal user, for changing call transferring state for a waiting user; in the second step, the terminal transmits a call transferring function message to the HLR that the waiting user belongs to so as to change the call transferring state; in the third step, the terminal checks information of the other users therein; and in the fourth step, once other users existing, the terminal determines whether transmitting a call transferring function message to the HLRs of the other users so asto change the call transferring state according to call transferring association strategy of the terminal and the call transferring information state of the other users. With the present invention, the following beneficial effect would be realized: without changing the protocol of the network side and setting of the HLR, independence between the call transferring association of different mode users (or different users in the same mode) in dual/multi mode terminal and holding different user call transferring setting could be achieved.

Description

Call Transfer Correlation Method {CALL TRANSFERRING ASSOCIATION METHOD}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of call switching in the field of mobile communication, and more particularly, to a call switching correlation method for realizing call correlation in a dual mode / multi-mode terminal. It is about.

With the development of third generation mobile communication technology, third generation mobile technologies such as TD-SCDMA, code division multiple access (CDMA), and wireless CDMA (WCDMA) have gradually entered the practical stage.

However, since the third generation mobile technology inevitably presents problems such as a network cover in the initial stage of network construction, the third generation mobile terminal needs to support the second generation mobile communication technology. At the same time, according to the development of technologies such as wireless LAN, it is necessary for a terminal to support two-mode or multi-mode communication technology. Recently, a dual mode or a multi-mode terminal is already produced by many companies, and some operators are also used.

The call switching function may divert an incoming call to one terminal to a designated mobile terminal or a fixed network communication device. The realization of the mobile switching function provides a viable processing method for a mobile terminal user who is uncomfortable or unable to receive a telephone call using the mobile terminal. It is universal and mature.

There are four main types of call diversion: unconditional call diversion, call diversion if busy, call diversion if not arrived, and call diversion if no response. These four types met the different needs of terminal users. There are five operations for call switching in the terminal, such as registration, activation, deactivation, deletion, and checking. These five operations provided the user with the ability to check and call the call diversion function.

As multi-mode and dual-mode terminals are used and disseminated, new requests are being made for the call transfer function. For example, when the dual mode terminal user activates the call switching function in one mode, the call switching function is activated even when the user calls the user of the other mode of the terminal. However, the current correlation between user call switching under different modes is realized through the mutual communication of HLRs (Home Location Registers) of different users (networks). This requires not only to modify the interface negotiation on the network side, but also to ensure that call switching settings of the users communicating with each other are consistent and cannot maintain mutually independent settings under the conditions of communicating with each other. The terminal user may not set different call diversion information for different users.

Accordingly, in a multi-mode terminal, call switching between users of different modes (or different users under the same mode) is correlated with each other, but a technical scheme capable of maintaining independence of call switching settings of different users is required.

SUMMARY OF THE INVENTION In order to solve the above problem, an object of the present invention is to provide a call switching correlation method for realizing call switching correlation of a dual mode / multi mode terminal.

According to an embodiment of the present invention, a call divert correlation method is provided.

First of all, the contents of the present invention are information registered in the mobile network, which corresponds to one mobile number and is identified by one user identification, and is not the same as the user of the terminal. A terminal using one physical member may have a plurality of different user identifiers at the same time. The terminal user refers to a physical person who uses the mobile terminal.

The call transfer correlation method according to the present invention includes the following steps: Step 1, the terminal receives a command to change the call transfer state to the standby user input by the terminal user, Step 2, the terminal Sends a call diversion function message to the home location register to which the standby user belongs to change the call diversion state. In step 3, the terminal examines information of other users in the terminal, and in step 4, other users exist. In addition, when the call switching function state meets the call switching correlation scheme setting request, the terminal changes the call switching state by transmitting the call switching function message to the home location register to which the other user belongs.

In the first step, the command for modifying the call switching state includes a registration command, an activation command, a deactivation command, and a delete command. In the second step, the call transfer function message transmitted from the terminal includes a call transfer registration message, a call transfer activation message, a call transfer deactivation message, a call transfer deletion message.

Call correlation strategy 1: The operations in steps 3 and 4 correlate only if the first step is an operation that initiated the call divert function and requires that call divert correlation operations be performed only if the current state of the other user is not active. do. In the case of call correlation strategy 1 below, a method of performing call switch correlation will be described in detail.

When the call transfer function of the scheme 1 needs to start the call transfer function: in the first step, the terminal receives a command to start the call transfer function for the standby user input by the terminal user; In step 2, the terminal transmits a call switch registration message to the home location register to which the standby user belongs, and starts the call switch function. In step 3, the terminal checks other user information in the terminal, In step 4, the call transfer function message is started by sending a call transfer function message to the home location register to which the other user belongs, in the situation where the other user exists and the same call transfer function is not started.

Thus, the following operation is performed to realize call divert correlation for the user who is at the same time in standby state:

In the first step, the terminal receives a command to start a call switching function for the standby user input by the terminal user, and in the second step, the terminal transfers the call to the home location register to which the standby user belongs. The call transfer function is started by sending a registration message, and in the third step, the terminal checks other user information therein and determines whether there are other users in the waiting state. Then, perform the following steps: Step A: Each uses the standby user's own network to check the status of the same kind of call divert function of each other standby user, and in step A, the state of the call divert function is deactivated. Under the situation judged as the state, in step 4, the call switching registration message of the standby user is set according to the call switching registration message in the second stage, and the registration message is sent to the home location register to which these other users belong. Start the call diversion function.

If you need to automatically switch to the idle user's network to achieve call divert correlation, perform the following steps:

In the first step, the terminal receives a command to start a call switching function for the standby user input by the terminal user, and in the second step, the terminal transfers the call to the home location register to which the standby user belongs. Initiating a call switching function by sending a registration message, and in the third step, the terminal checks other user information in the terminal to determine whether other users exist, and then performs the following steps: Step A, In the presence of other users, switches to the network corresponding to each other user in the predetermined order and switches the standby state of the other users, and in step B, each other user's own call is switched using the other user's own network. Examine the current state of the function, and in Step B, determine that the state of the call switching function is inactive. Stand and sets the second switch a call to other users in accordance with call switching registration message in the step 2, a registration message is noted that in the step 4 and initiates a call switching function to transmit the same message to the groups registered home position this other user belonging.

After initiating the call divert function, the terminal preserves existing call diversion information so that the user automatically switches other network users manually or due to other reasons, so as not to affect the call of the network in standby state at the time. If so, the corresponding call switching process is performed. Thus, after performing the second step, it is checked whether the call diversion information is preserved. If the call diversion information is preserved, the previously stored call diversion information is deleted. On the contrary, if the call diversion information is not stored, the current call is not stored. Preserve the conversion information and do not perform the third and fourth steps.

In addition, if the user switches the network manually or for other reasons, perform the following operation to realize the call divert correlation of the idle user:

In step A, the terminal switches to the new non-waiting user and waits, and in step B, it is checked whether the call switching setting information is stored in the terminal, and if the call switching setting information is stored, the following steps are performed: Examine the state of the new standby user's call diversion function, which is the same as the call diversion setting information saved using the new standby user's network, and save it under the condition that the state of the call diversion function checked in steps D and C is inactive. Set the call switching function of the current user according to the call switching setting information and start the call switching function by sending a call switching registration message to the home location register to which the current user belongs.

In addition, for each of the above processes of the scheme 1, when the call switching state is checked as the activated state, no operation is performed and the related processes are bound. At the same time, when a command for changing the other call switching state is input to the standby user, the operation is performed only for the call switching function of the current user, and no processing is performed for other users.

BRIEF DESCRIPTION OF THE DRAWINGS The drawings described herein are intended to further understand the present invention and are a part of the present invention, and the examples and descriptions thereof described are for interpreting the present invention and not to unduly limit the present invention.

1 is a flowchart of a call divert correlation method according to an embodiment of the present invention;

2 is a flowchart of a call transfer correlation method according to a first embodiment of the present invention;

3 is a flowchart of a call transfer correlation method according to a second embodiment of the present invention;

4 is a flowchart of a call transfer correlation method according to a third embodiment of the present invention;

5 is a flowchart of a call transfer correlation method according to a fourth embodiment of the present invention;

6 is a flowchart of a call transfer correlation method according to a fifth embodiment of the present invention;

7 is a flowchart of a call transfer correlation method according to a sixth embodiment of the present invention;

8 is a flowchart of a call transfer correlation method according to a seventh embodiment of the present invention;

9 is a flowchart of a call transfer correlation method according to an eighth embodiment of the present invention.

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

First, the contents to be described are information registered in the mobile network of the user in the present invention, which corresponds to one mobile number and is identified by one user identifier, and is not the same as the user of the terminal. A terminal used by one physical person may simultaneously have a plurality of different / identical user identifiers. The terminal user refers to a physical person who uses the mobile terminal.

The main idea of the present invention is as follows: When a user initiates a kind of call switching state modification for the user under a situation in which the user is in a waiting state, a message for changing the call switching function in the terminal is sent. After transmitting to the HLR to which the user belongs, the terminal detects information of other users in the terminal. If other users are present, they will be billed to the HLR to which they belong via the network of other users and according to the existing call diversion settings and the call diversion scheme set by the previous user based on the current call diversion state Determine whether to send a change message of the call diversion function status to this user's home location register.

As shown in Fig. 1, the call switching correlation method provided in the embodiment of the present invention includes the following steps: Step S102, the terminal receives a command to change the call switching state to a standby user sent by the terminal user. In step S104, the terminal transmits a call switching function message to a home location register to which the standby user belongs to change the call switching state. In step S106, the terminal checks information of other users in the terminal, and in step S108, other In the situation where the user exists and the call switching function state meets the call switching correlation scheme setting condition, the terminal changes the call switching state by sending a call forwarding function message to the home location register to which the other user belongs.

Among them, in step S102, the instruction for modifying the call switching state includes a registration instruction, an activation instruction, an inactivation instruction, and a deletion instruction. In step S104, the call transfer function message transmitted from the terminal includes a call transfer registration message, a call transfer activation message, a call transfer deactivation message, and a call transfer deletion message.

In order to completely match the call switching settings of different users in the same dual mode / multi mode terminal, in step S108 the terminal transmits the same call switching function message as in step S104 to realize the same call switching function operation.

It is determined whether or not to perform steps S106 and S108 based on different call divert correlation demands at the end of step S104 in order to set different call divert correlation classes of the dual / multi mode terminal. The call switching correlation demand herein may include correlating only to an operation for changing the call switching state to one or several of them.

In order to realize different call switching correlation classes of the dual mode / multi mode terminal, in step S106, it is determined whether or not to check the existing call switching state of the correlated user based on different call switching correlation demands. In step S108, it is determined whether or not to perform the operation for changing the call switching state to the correlated user based on the demand of the call switching correlation. The call divert correlation demand referred to herein means that the same call divert function status of the other user is transmitted to the target state (the state where the HLR is to switch after receiving the call divert information) or when the call divert state modification information is not defined. Or sending direct call diversion state information without performing an examination of the current call diversion state of the correlated user.

In the following, a process of realizing a call switching correlation method according to the present invention by combining specific embodiments will be described.

First embodiment

First, a process for realizing the technical solution of the present invention for a user who is waiting at the same time in accordance with the above-described strategy 1 under the situation of the multi-mode and the multi-standby terminal will be described. As shown in Fig. 2, the following steps are included:

In step S202, the terminal receives a command to start the call switching state for the standby user input by the terminal user, and in step S204, the terminal transmits the call switching registration message to the home location register to which the standby user belongs. In step S206, the terminal examines other user information therein to determine whether there is a standby user, and in step S208, the standby state of each call user's call switching function through the standby user's own network. Step S210 is performed under the situation where the state of the call switching function is determined to be inactive. In step S210, the terminal sets the call divert registration message of the standby user according to the call divert registration message in step S204 and transmits a call divert function message to the home location register to which the standby user belongs to starts the call divert function. In addition, in the situation where the call switching state is determined to be activated in step S208, the processing ends.

Second embodiment

For other non-waiting users under the same call correlation strategy of the first embodiment, according to the operation in this embodiment, the network is automatically switched to the network to which such user belongs, Allow registration on the network and then perform call diversion processing.

As shown in Fig. 3, the processing in this embodiment includes the following steps:

In step S302, the terminal receives a command to start a call switching state for a standby user input by the terminal user, and in step S304, the terminal sends a call switching registration message to a home location register to which the standby user belongs to call switching. In step S306, the terminal examines other user information therein, and in step S308, in the presence of other users, switches to networks corresponding to other users in a predetermined order and changes the standby state of other users. In step S310, each other user's own network is used to check the current state of the call switching function of each other user, and in step S312, the terminal calls the call switching registration message of the standby user according to the call switching registration message in step S304. A call switch function message to the home location register to which the standby user belongs Send a call to start the call diversion function. In addition, in the situation where the call switching state is determined to be activated in step S310, the processing ends.

Third embodiment

When the terminal user starts the call switching function of the current standby user, the operation in this embodiment is performed. The call correlation strategy is the same as in the first embodiment.

As shown in Fig. 4, the following processing is included:

In step S402, the terminal receives a command to start a call divert function for one standby user input by the terminal user, and in step S404, the terminal transmits a call divert registration message to an HLR to which the standby user belongs. Starts the state, and checks whether the existing call switching information is stored in step S406, deletes the previously stored call switching information under the situation that it is determined in step S408 and step S406 that the call switching information is saved; Preserve call diversion information. Otherwise, in the situation where it is determined in step S406 that call conversion information has not been saved, the process directly goes to step S410.

Fourth embodiment

When the terminal switches the standby user, call switching processing is performed according to the operation shown in Fig. 5, and the call switching correlation scheme is the same as in the first embodiment.

As shown in Fig. 5, in step S502, the terminal switches to a new non-waiting user and waits. In step S504, it is checked whether the terminal has stored call switching setting information, and in the situation where call switching setting information is present. Step S506, using the existing new standby user's network, checks the state of the call switching function of the new standby user which is identical to the stored call switching setting information, and checks the call switching function checked in steps S508 and S506. Set the call switching function of the current user according to the stored call switching setting information under the condition that the state of the inactive state is deactivated, and start the call switching function by sending a call switching registration message to the home location register to which the current user belongs. In addition, the operation is bound in a situation in which the state examined in step S506 is in an activated state.

In addition, call transfer settings of users of different modes of the same terminal (which may be different users of the same mode) need to be kept completely consistent under some terminal demand. In order to realize such a function, the call switching correlation method provided by the embodiment of the present invention is further simplified and modified to realize perfect correspondence of call switching settings of different users of the same dual mode or multi mode terminal.

When a user arbitrarily performs a correlation operation (registration, activation, deactivation, deletion, etc.) that can change the user call switching state for the user in a waiting state, the call switching message (registration) correlated by the terminal is registered. , Activation, deactivation, deletion, etc.) to the HLR to which the user belongs, and the terminal detects the information of the other users in the terminal, and if the other user exists, the terminal according to the call conversion setting set by the previous user. Perform the same operation on the user's call diversion function and send the same information to the user's HLR.

The following fifth, sixth, seventh, and eighth embodiments are methods for realizing call switch correlation operation under the condition that call switch settings of different users of the same terminal described above maintain perfect correspondence.

Fifth Embodiment

In the case of the multi-standby terminal in the multi-mode, the operation of realizing the call switching correlation method of the present invention for users in other simultaneous standby states includes the following steps as shown in FIG.

Step S602, the terminal receives any command to change the state of any one call switching function for a user in the standby state input by the user, and in step S604, the terminal switches the call to the HLR to which the user belongs. Send a corresponding message to change the functional state to change the call switching state, step S606, check the standby user information under the current state of the terminal and determine whether there are other users in the waiting state in the terminal, step S608, step In a situation where it is determined in S606 that the other user is in a waiting state, the call switching function of the current user is set according to the call divert setting information of the user in step S602, and the same message as in step S604 is sent to the HLR to which each of them belongs. Change the state that invokes this switch function. In addition, in the situation where it is determined in step S606 that no other user is in the waiting state, the process ends.

Sixth embodiment

A user who is not in the other standby state of this device can automatically switch the standby network to the network to which this user belongs according to the method in this embodiment, register with this user, and perform call switching processing.

As shown in Fig. 7, the following steps are included:

Step S702, the terminal receives a command to change the state of any one kind of call switching function for a user in the standby state input by the user, and in step S704, the terminal transfers the call switching function to the HLR to which the user belongs. Sending a corresponding message to change the state to change the call transfer state, and in step S706, check whether there is information of the non-waiting user in the terminal, and in a situation where it is determined that there is information of the non-waiting user in steps S708 and S706, Each of them switches to the network corresponding to these users in a certain order to switch the standby state of these users, and sets the call switching function of the current user according to the user call switching setting information in steps S710 and S702, and The state of invoking the switching function by sending the same message to each HLR to which it belongs is developed. Change. In addition, in the situation where it is determined in step S706 that there is no information of the non-waiting user, the processing is bound.

Seventh embodiment

In order to prevent the terminal from affecting the call of the network in the standby state after starting the call transfer function, the existing call transfer information is stored in the terminal so that the user can manually or manually for other reasons. When switching network users, call switching is performed.

As shown in Fig. 8, the following processing is included:

Step S802, the terminal receives any command for changing any one call switching function state for a user in the standby state input by the user, and in step S804, the terminal switches the call to the HLR to which the user belongs. Sending a corresponding message to change the function state to modify the call switching state, and check whether the existing call switching information is stored in step S806, and in a situation where it is determined that the call switching information is stored in steps S808 and S806, The call switching information stored before is deleted, and the existing call switching information is stored in step S810. Among them, in a situation where it is determined in step S806 that call conversion information has not been saved, the process directly goes to step S810.

Eighth Embodiment

When the terminal switches the network standby user, the process shown in Fig. 9 is performed:

In step S902, the terminal switches to the new non-waiting user and waits, and in step S904, the call switch setting information stored in the terminal is checked, and in step S906 and step S904, the call switch setting information is determined to be saved. Set the call diversion function of the current user according to the call diversion information, and change the state of the call diversion function by sending the same call diversion message to the HLR to which it belongs.

The above various treatments will be described in combination with the specific examples below.

Example 1

Dual Card Slots In a GSM / TD-SCDMA dual mode terminal, a GSM SIM card and a TD-SCDMA USIM card are inserted, respectively. The MSISDN numbers for these two cards are 139 ******** and 188 ******** respectively. The UE is currently in the GSM / TD dual standby mode and is busy with the user 1 with the number 139 ********. If set to, then the terminal transmits a message of registration and activation call switching service to the HLR to which User1 belongs. At the same time, the terminal transmits a call switching status check message to the HLR to which User 2 with the number 188 ******** belongs to obtain the current call switching service status. At this time, if the 188 ******** user finds that the call transfer is inactive, the terminal transmits registration and activation information to the HLR through the 188 ******** network and the user 2 is busy. When the call transition starts work. If the other end user calls the user with the number 188 ********, if the 188 ******** user finds that he is busy, the system starts the call divert task and makes the call. Switch to the terminal whose MSISDN number is 138 ********. At this time, a mutually correlated function of call switching tasks under different modes of a dual mode (multi-mode) terminal is realized.

Example 2

In the dual mode terminal in the first embodiment, when the user 2 is busy with the number 188 ********, the call transfer task is set and the call transfer number is set to 137 ********. At this time, the terminal transmits a registration and activation call conversion work message to the HLR to which user2 belongs. At the same time, the terminal transmits a call switching status check message to the HLR to which User 1 having the number 139 ******** belongs to obtain the current call switching service status. At this time, when the user finds that the call transfer is activated when the user is busy, the terminal maintains the standby state without performing any other operation. At this time, when 139 ******** of the user 1 is busy, the other terminal calls the user 1. At this time, if the 139 ******** user finds that the user is busy, the system starts the call switching task and switches the call to the terminal whose MSISDN number is 138 ********. At this time, if the 188 ******** number of the user 2 is busy, the other terminal calls the user 2. At this time, if the 188 ******** user finds that the user is busy, the system starts the call transfer task and switches the call to the terminal whose MSISDN number is 137 ********. At this time, the cross-correlation and independent operation functions of call switching tasks under different modes of the dual mode (multi-mode) terminal are realized.

The above description is an optimized embodiment of the present invention, which does not limit the present invention, and those skilled in the art can bring various modifications and changes to the present invention. All modifications, equivalent replacements, improvements, and the like, which are made without departing from the spirit and principles of the present invention, fall within the protection scope of the present invention.

Through the above technical solution, the present invention may bring the following effects. In other words, under the condition of negotiating network side and modifying HLR setting, it is possible to realize the correlation of call switching between users in different modes (or different users under the same mode) among dual / multimode terminals. You can maintain the independence of your call divert settings.

Claims (10)

A call switch correlation method for realizing call switch correlation in a dual mode / multi mode terminal, A first step of receiving, by the terminal, a command for changing a call transfer state for a standby user input by the terminal user; A second step of changing, by the terminal, a call transfer function message to a home location register to which the standby user belongs; A third step of the terminal inspecting information of other users in the terminal; If another user is present and the call transfer function state meets the requirements of the call transfer correlation scheme, the terminal sends the call transfer function message to the home location register to which the other user belongs to change the call transfer state. Call switching correlation method comprising the step of four. The method of claim 1, In the first step, the command for changing the call transfer state includes a registration command, an activation command, a deactivation command, and a delete command. In the second step, the call transfer function message transmitted from the terminal is a call transfer. A call divert correlation method comprising a registration message, a call divert activation message, a call divert disable message, and a call divert delete message. The method of claim 2, In the fourth step, the terminal transmits the same call switching function message as in the second step to realize the same call switching function operation, thereby completely matching the call switching settings of different users in the same dual mode / multi mode terminal. Call switching correlation method, characterized by realization. The method of claim 2, In step 3, it is determined whether or not to check the existing call conversion state of the correlated user based on different call divert correlation demands, and in step 4, the same call divert to the correlated user based on the demand of call divert correlation. And determining whether or not to perform a state modification operation. The method according to any one of claims 1 to 4, If you need to start the call diversion function, In the first step, the terminal receives a command to start the call switching function for the standby user input by the terminal user, In the second step, the terminal starts the call switching function by sending a call switching function registration message to the home location register to which the standby user belongs; In the third step, the terminal checks the other user information in the terminal, In the fourth step, a call transfer function is initiated by sending a call transfer function message to a home location register to which the other user belongs to in a situation where the other user exists and the same call transfer function is not started. Conversion Correlation Method. The method of claim 5, At the same time, if you need to realize call divert correlation for other users who are in a waiting state, In the first step, the terminal receives a command to start the call switching function for the standby user sent by the terminal user, In the second step, the terminal starts a call switching function by transmitting a call switching registration message to the home location register to which the standby user belongs, In the third step, the terminal examines other user information therein and determines whether there is a user in standby state. Step A: Each uses the standby user's own network to examine the status of the call divert function of each standby user, In the step A, under the situation where the state of the call switching function is determined to be inactive, In the fourth step, the call divert registration message of the standby user is set according to the call divert registration message in the second stage, and the call divert registration message is transmitted to a home location register to which the other user belongs. And performing the step of starting a function. The method according to claim 5, If you need to automatically switch to a network of non-waiting users to achieve call divert correlation In the first step, the terminal receives a command to start the call switching function for the standby user sent by the terminal user, In the second step, the terminal starts a call switching function by transmitting a call switching registration message to the home location register to which the standby user belongs, In the third step, the terminal checks other user information in the terminal to determine whether other users exist, and then: In step A, in the presence of other users, switching to a network corresponding to the other users in a predetermined order, and switching standby states of the other users, Step B, each using the other user's own network to check the status of the call divert function of each other user, Under the situation where the state of the call transfer function is determined to be inactive in step B In the fourth step, the call divert registration message of the other user is set according to the call divert registration message in the second stage, and the call divert registration message is transmitted to a home location register to which the other user belongs. Call divergence method, characterized in that it starts a function. The method of claim 5, And initiating a call switching function in the second step, the terminal user switches to another network to perform call switching processing. The method of claim 8, When the terminal user starts the call switching function for the standby user, it is checked whether the existing call switching information is preserved after the second step, and the previously stored call switching information is deleted and the existing call switching information is deleted under the situation where the call switching information is preserved. And preserves call transfer information of the current state and does not perform the third and fourth steps under the situation where call transfer information is not stored. The method of claim 8, If you realize call divert correlation for non-waiting users, Step A, the terminal switches to a new non-waiting user and waits, Step B, it is checked whether the call conversion setting information is stored in the terminal, In step C and step B, if there is call switch setting information, the state of the call standby function of the new standby user which is identical to the call switch setting information stored using the existing new standby user's network is checked, If there is call switch setting information in step D and step B, the call switch function of the current user is set according to the call switch setting information stored under the condition that the state of the call switch function checked in step C is inactive. A call divert correlation method comprising: sending a call divert registration message to a home location register to which an existing user belongs to to start a call divert function.

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