CN1419394A - Method for realizing roaming local telephone number business of mobile telephone user - Google Patents

Abstract

A method for realizing the "roaming local number" service for mobile phone users, comprising the following steps: (1) In addition to the original number of the SIM card, the mobile user applies for a local number to the roaming operator; the operator loads the newly added number in the network ; (2) The user accesses the system management number by means of a service call: disable or activate any number without shutting down the phone; (3) Other users can dial any number of the "roaming local number" user to make a call; if When the number is closed, the system will play a voice prompt; (4) The user can choose a different number to call out and display it to the called party; (5) When the called "roaming local number" user is in the same network as the calling party, the system will directly Connect the calling and called users to achieve routing optimization; (6) The user can choose to charge the outgoing and/or incoming calls of different numbers separately, or uniformly; and the original number in the home network and the roaming location The billing mode for local numbers can be different.

Description

Implementation method of "roaming local number" service for mobile phone users

technical field

The present invention relates to a method for realizing the "roaming local number" service of a mobile phone user. Specifically, it relates to a method for users using the same mobile phone and MSISDN (Mobile Station International ISDN Number) number in a different place ( Access to the network) mobile phone users who roam into the local network are allocated a local mobile phone number to realize the method of "roaming local number" service, so as to save expensive roaming charges and long-distance charges, and the user does not need to purchase and register another SIM card and mobile phone. The invention belongs to the technical field of the value-added service of the telecommunication mobile network.

Background technique

At present, in the existing mobile telecommunications network, a SIM card is assigned a mobile station international ISDN number MSISDN (Mobile Station International ISDN Number) number, which is commonly referred to as a mobile phone number, that is, a user can only have one mobile phone number. For mobile users who often travel long-distance business, the cost of roaming calls in different places (accessing the network) using the same mobile phone and number is high, and the local users who access the network also need to dial a long-distance access code when calling the user, such as domestic long-distance Access codes, even international access codes. In this way, even when a local user calls a local roaming user, because the long-distance access code is used, the actual voice connection is still a long-distance call, and the calling and called users are charged for the long-distance call respectively. For example, Hong Kong mobile user 91111111 roams to Beijing, China, and the Beijing user needs to dial "00-852-91111111" to call the Hong Kong user. The call includes two sections of calls from Beijing to Hong Kong and Hong Kong to Beijing. The Beijing user has to pay the call fee from Beijing to Hong Kong, while the Hong Kong user has to pay the call fee from Hong Kong to Beijing.

If the user wants to obtain a local mobile phone number while roaming, he must purchase a new SIM card, and when using the local MSISDN number, insert the corresponding SIM card in the mobile terminal. If the user uses a mobile phone that can only be inserted into a SIM card, the original number of the user cannot be used at this moment. Like this, when the user returns to the home network and wishes to use the original MSISDN number, the original SIM card needs to be replaced. At this time, the local number applied by the user in the roaming place is not available. It is true that if the user uses a mobile phone that can insert multiple SIM cards at the same time, he can use several different MSISDN numbers corresponding to these SIMs at the same time; but the number of numbers is still limited, and the biggest disadvantage of this method of use is It is mobile users who have to spend a lot of money on expensive multi-SIM phones and multiple SIM cards. This high expense limits and hinders the application and popularization of many SIM card mobile phones.

Contents of the invention

The purpose of the present invention is to provide a method for realizing the "roaming local number" service for mobile phone users. The method allows users of the "roaming local number" service to be in different cities at the same time when they have a SIM card and a mobile phone. Or the country's mobile network operator to apply for a local MSISDN phone number, no need to buy a new SIM card. Moreover, no matter which network the user is roaming in. These numbers can all be used at the same time. When the called party is in the same network as the calling party, the "roaming local number" service has the function of optimizing routing, directly connecting the calling party to the called party in the same network without establishing two long-distance calls. It can not only improve the connection efficiency of the voice channel, but also save the cost of the long-distance voice channel. However, when a "roaming local number" user serves as a calling party to call a called party in the same network, he can directly dial the called number in the same network according to the numbering plan of the calling network. The system provides a direct link for the calling party and the called party. Therefore, the method can provide mobile phone users with greater convenience, and also provide mobile network operators with a new value-added service, which can create better benefits.

The object of the present invention is achieved like this: a kind of implementation method of mobile phone user " roaming local number " service, it is characterized in that: this method comprises the following steps:

(1) Use application: In addition to the original MSISDN number of the SIM card, the mobile user applies for a local MSISDN number from one or more mobile network operators in different roaming places, and has multiple MSISDN numbers of different networks at the same time; The added number is loaded in the related equipment of the network;

(2) Number management: mobile phone users with "roaming local numbers" can use service calls provided by operators, WWW webpages, SMS or WAP/GPRS methods to access their management systems, close or activate any MSISDN number without shutting down the phone;

(3) Incoming call: Other users can dial any MSISDN number of the mobile phone user of the "roaming local number" to realize the conversation with the "roaming local number" user; and if other users dial the number that is closed , the system will play the corresponding voice prompt to the user;

(4) Outgoing calls: When a "roaming local number" user calls out, he can choose to use a different MSISDN number to display to the called user;

(5) Routing optimization: When the "roaming local number" user is in the same network as the called party and the calling party, the system network can provide the function of optimizing the route, directly connecting the calling party to the called party in the same network without Establish two long-distance calls;

and , The charging mode of the original number of the "roaming local number" user in the home network and the charging mode of the local number of the user in the roaming place may be different.

In the step (1), the operation steps for the operator to load the new local number of the "roaming local number" user in the relevant equipment of the network system are:

(11) Add a user record for the newly added local MSISDN number in the home location register HLR (Home Location Register) of the roaming mobile network;

(12) In the user record, in addition to including the newly added local MSISDN number, the terminal CAMEL user information T-CSI (Terminating CAMEL Subscription Information) parameter of the user is also set. The service control point SCP (Service Control Point) address information of the "local number" function and the keyword information of the "roaming local number" function; other mandatory parameters required by the HLR can be filled with virtual parameters; the T-CSI of the MSISDN number The information is used to trigger an incoming call to the newly added MSISDN number;

(13) If the user wants the phone to be called out, use a different MSISDN number as the calling number displayed to the called party, set the originating CAMEL user information in the record of the original MSISDN number in the home location register HLR of the user's home network. -CSI (Originating CAMELSubscription Information,) parameter, which contains the service control point SCP address information and keyword information of the "roaming local number" service used to control and process the "roaming local number" function; the user's phone calls through Triggered by the O-CSI information of the user's original number;

(14) Store the user's original MSISDN number and the newly added MSISDN number in the roaming area in the database of the intelligent network system of the roaming network.

In the described step (3), the call processing process when other users dial the original MSISDN number of the "roaming local number" mobile phone user is the same as the existing mobile phone incoming call process; the operation steps of the processing process are: when When other users dial the original MSISDN number of the "roaming local number" mobile phone user, the mobile switching center MSC obtains the user's current roaming number from the user's HLR; then according to the roaming number, the call is connected to the user's current The local MSC, and connected to the user's mobile phone.

In the described step (3), when other users dial the newly added local MSISDN number of the "roaming local number" mobile phone user, the specific operation steps of its call processing process are as follows:

(31) Other users directly dial the roaming local number of the "local roaming number" mobile phone user in the roaming network without dialing the international/domestic long-distance access code specified by the roaming network;

(32) The mobile switching center MSC of the roaming network obtains the terminal CAMEL user information T-CSI parameter registered by the roaming local number dialed from the home location register HLR of the "roaming local number" user in the roaming network, and the MSC according to the T-CSI parameter -CSI parameter, report the call to the service control point SCP (Service Control Point) or service capability server SCS (Service Capability Server) specified in the T-CSI parameter;

(33) The SCP/SCS inquires the user information of the "roaming local number" stored in the roaming network database, and obtains that the current state of the roaming local number is closed, then proceed to the operations of steps (34) and (35) in sequence; if obtained The current state of the roaming local number is open, then perform the operations of steps (36) to (38);

(34) The SCP/SCS instructs the MSC to play a voice prompt to the calling user and release the call;

(35) MSC releases the call;

(36) The SCP/SCS converts the roaming local number dialed by the caller to its original MSISDN number according to the user information stored in the database;

(37) The SCP/SCS returns the converted original MSISDN number to the MSC, and instructs the MSC to connect the call to the mobile phone of the "roaming local number" user according to the original MSISDN number;

(38) The MSC performs connection processing according to the basic call flow of the mobile network, and connects the call.

In the step (4), when the "roaming local number" user applies for the service, he can choose to set the original MSISDN number as the default calling number. When the user calls out, the connection process is the same as the normal mobile phone call out process , without the control and processing of SCP/SCS, the default number will be sent to the called user and displayed on the called user's terminal.

In the step (4), when the "roaming local number" user calls out, he can choose to use different MSISDN numbers through the SIM card menu, SCP/SCS voice prompts and preset calling number three different methods to display to The called user, and charges the MSISDN number used in the call.

The described calling out selection method that uses different MSISDN numbers through the SIM card menu selection is that the calling number selection menu is provided by the SIM card, and the "roaming local number" user selects and uses it when calling out; the specific operation steps of its processing process as follows:

(411) The "roaming local number" user selects the calling number used for this outgoing call from the calling number menu of the SIM card;

(412) The user dials the called user's phone number. The SIM card will automatically add a prefix symbol before the original MSISDN number, which indicates the calling number used for this call;

(413) The mobile switching center MSC obtains the originating CAMEL user information O-CSI parameter of the user's original MSISDN number from the visitor location register VLR, and the MSC reports this call to the specified in the O-CSI parameter according to the O-CSI parameter Service Control Point SCP or Service Capability Server SCS;

(414) The SCP/SCS queries the user's information according to the calling number, and converts the calling number into a number specified by the user according to the prefix symbol;

(415) The SCS/SCP returns the converted calling number to the MSC, and instructs the MSC to use the converted number as the calling number to connect the call to the called user; in addition, this call will The calling number is billed.

(416) The call is connected, and the roaming local number selected by the user is displayed on the called terminal.

The described calling out selection method that selects to use different MSISDN numbers by SCP/SCS voice prompt is to be that SCP/SCS provides voice prompt, is selected and used by this "roaming local number" user when calling out; The concrete operation step of its process as follows:

(421) The "roaming local number" user dials the called user's phone number;

(422) The mobile switching center MSC obtains the originating CAMEL user information O-CSI parameter of the original MSISDN number of the user from the visitor location register VLR; the MSC reports this call to the specified in the O-CSI parameter according to the O-CSI parameter service control point SCP;

(423) The SCP controls relevant network equipment to play a prompt tone to the calling user, asking the user to select a calling number to make a call;

(424) The SCP returns the corresponding roaming local MSISDN number or other numbers as the calling number to the MSC according to the calling user's selection;

(425) The MSC connects the call to the called user according to the roaming local MSISDN number or other numbers returned by the SCP as the calling number;

(426) The call is connected, and the roaming local MSISDN number or other numbers selected by the user are displayed on the called terminal, and at the same time, the calling number selected for this call will be billed.

The method of selecting and using different MSISDN numbers by presetting the calling number is that the user of the "roaming local number" accesses the "roaming number" through the service telephone, WWW web page, short message and WAP/GPRS method provided by the operator. "local number" management system, pre-set the sent calling number; there are many kinds of setting contents: any number it belongs to can be set as the default calling number, when the "roaming local number" When the user makes an outgoing call, the default number will be sent to the called user's mobile phone; different numbers can also be set as the calling number according to different calling positions; different numbers can also be set as the calling number according to different time periods. calling number.

In the step (5), when the "roaming local number" user is located in the same network as the called party and the calling party, the system network provides the function of optimizing routing, directly connecting the calling party to the called party located in the same network , and no longer establish two long-distance calls, the specific operation steps are as follows:

(51) Other users on the same network directly dial the roaming local number of the "roaming local number" user without dialing the international/domestic long-distance access code stipulated by the network;

(52) The originating mobile switching center MSC obtains the T-CSI parameter of the terminal CAMEL user information registered by the dialed roaming local number from the home location register HLR of the roaming network user of the "roaming local number", and the MSC according to the T-CSI parameter , report this call to the service control point SCP or service capability server SCS in the roaming network specified in the T-CSI parameter;

(53) The SCP/SCS converts the roaming local number dialed by the caller to its original MSISDN number according to the "roaming local number" user information stored in the roaming network database;

(54) The SCP/SCS interacts with the HLR of the "roaming local number" user in the home network according to the converted original MSISDN number, and queries the current location information of the user;

(55) The SCP/SCS returns the inquired current location information of the "roaming local number" user to the MSC, and instructs the originating MSC to connect the call to the mobile phone of the "roaming local number" user according to the number;

(56) The originating MSC connects the call to the MSC at the user's current location according to the current location information of the "roaming local number" user, and connects the user's mobile phone; the call is connected.

The implementation method of the "roaming local number" service can realize the call screening function, that is, each MSISDN number can be set to be limited to receiving calls from users in certain areas, and reject calls from other areas; Receive calls from users in certain regions, and only allow calls from other regions.

The implementation method of the "roaming local number" service can set its own off/on time period for each MSISDN number.

The "roaming local number" service for mobile phone users in the GMS network provided by the present invention is a telecom mobile network value-added service developed on the basis of the intelligent network, just like other services provided on the intelligent network to provide users with diversified services. Services can also bring win-win benefits to mobile users and mobile network operators.

First, mobile users can still use their existing mobile phones and SIM cards, without spending additional fees to purchase and register new mobile phones and SIM cards. Mobile users can tell their local MSISDN numbers in different locations to local people (such as customers, friends, family members, etc.), and through the number management function, all numbers (including original numbers and new roaming numbers) can be activated at the same time. Local number) enters the use state, or closes any number, selects and formulates the place and time to receive calls from different groups of people; when calling out, the user can use the SIM card menu selection or intelligent network voice prompts to select the calling number, The selected calling number is displayed on the called user's mobile phone. Therefore, the present invention can more conveniently, flexibly, economically and effectively meet the call demands of various users. In this way, the mobile user is more willing to tell others the number, and can keep the phone on all the time. Naturally, the traffic volume will be increased, which will bring more benefits to mobile network operators. Because the original number and the newly added roaming local number can be billed separately, various enterprises and institutions will be more willing to equip their employees with mobile phones. This will also increase the traffic volume and bring greater benefits to mobile network operators.

In addition, the implementation method of the present invention mainly relies on the software system developed on the intelligent network, and the investment cost on the hardware equipment is very small, and the newly added roaming local number does not involve the access authentication, roaming location management, cell switching and Call control and other functions, all these functions are still implemented through the user's original MSISDN number, so there is no need to change the current mobile phone network and its related protocols, therefore. The application and popularization of the present invention is relatively convenient, easy to realize and promising in prospect.

Description of drawings

Fig. 1 is a flow chart of the operation steps of the implementation method of the "roaming local number" service for mobile phone users.

Fig. 2 is a schematic diagram of an embodiment when other users dial the MSISDN number newly added by the "roaming local number" mobile phone user in the implementation method of the present invention.

Fig. 3 is a schematic diagram of an embodiment of the call-out process in which the "roaming local number" mobile phone user uses the SIM card menu to select the calling number in the implementation method of the present invention.

Fig. 4 is a schematic diagram of an embodiment of the operation steps of implementing "optimized routing" in the implementation method of the present invention.

Detailed ways

Referring to Fig. 1, the present invention is a kind of implementation method of mobile phone user " roaming local number " service, and this method comprises the following steps:

(1) Use application: In addition to the original MSISDN number of the SIM card, the mobile user applies for a local MSISDN number from one or more mobile network operators in different roaming places, and has multiple MSISDN numbers of different networks at the same time; The added number is loaded in the related equipment of the network;

(2) Number management: mobile phone users with "roaming local numbers" can use service calls provided by operators, WWW webpages, SMS or WAP/GPRS methods to access their management systems, close or activate any MSISDN number without shutting down the phone;

(3) Incoming call: Other users can dial any MSISDN number of the mobile phone user of the "roaming local number" to realize the conversation with the "roaming local number" user; and if other users dial the number that is closed , the system will play the corresponding voice prompt to the user;

(4) Outgoing calls: When a "roaming local number" user calls out, he can choose to use a different MSISDN number to display to the called user;

(5) Routing optimization: When the "roaming local number" user is in the same network as the called party and the calling party, the system network can provide the function of optimizing the route, directly connecting the calling party to the called party in the same network without Establish two long-distance calls;

(6) Independent billing: "Local roaming number" users can choose to bill separately for the MSISDN numbers used in calls to and/or from different MSISDN numbers, or they can calculate the charges uniformly on one of the numbers, for example The original number of the user; moreover, the charging mode of the original number of the "roaming local number" user in the home network and the charging mode of the local number of the user in the roaming place may be different. For example, the original number is a postpaid user, while its roaming local number can adopt the prepaid mode.

Referring to Fig. 2, in the step of introducing the method of the present invention, calling user B and C use their own numbers to dial and call a newly added MSISDN number of "roaming local number" user A's call-in embodiment. In the figure: user A is a "local roaming number" user, has the original number, roaming number 1 applied for in roaming network 1 and roaming number 2 applied for in roaming network 2, of which roaming network 1 has been closed. User B and user C are located in roaming network 1 and roaming network 2 respectively. The specific operation steps of its call-in processing process are:

①User B directly dials the local roaming number 1 of user A in roaming network 1, without dialing the international/domestic long-distance access code specified in network 1;

② The mobile switching center MSC of the roaming network 1 obtains the T-CSI parameter of the terminal CAMEL user information registered by the dialed roaming local number 1 from the home location register HLR of the roaming network 1 of the user A. The MSC reports the call to the service control point SCP or service capability server SCS specified in the T-CSI parameter according to the T-CSI parameter;

③ The SCP/SCS queries the user information stored in the database, and obtains that the current state of the roaming local number 1 is closed;

④ The SCP/SCS instructs the MSC to play a voice prompt to user B and release the call;

⑤ Call release.

⑥User C directly dials the roaming local number 2 of user A in roaming network 2, without dialing the international/domestic long-distance access code specified by network 2;

⑦ The mobile switching center MSC of the roaming network 2 acquires the T-CSI parameter registered by the dialed roaming local MSISDN number 2 from the HLR in the roaming network 2 of the user A. The MSC reports the call to the SCP or SCS in the roaming network 2 specified in the T-CSI parameter according to the T-CSI parameter;

⑧SCP/SCS converts the roaming local number 2 dialed by the caller into the original MSISDN number of user A according to the user information stored in the SCP or SCS database in the roaming network 2;

⑨SCP/SCS returns the converted MSISDN number of user A to MSC, and instructs MSC to connect the call to the mobile phone of user A with the "roaming local number" according to the number;

⑩MSC connects according to the basic call flow of the current mobile network, and connects the call.

Therefore, the present invention can realize that the caller can make an incoming call through any number owned by the "roaming local number" user.

The present invention can choose to set the original MSISDN number as the default calling number during the outgoing connection process of the "roaming local number" telephone user, and can also set three different calling numbers through the SIM card menu, SCP/SCS voice prompt and preset calling number. Method Select to use a different MSISDN number as the calling number and display it to the called user.

Referring to Fig. 3, only one of the methods will be introduced below: when "roaming local number" user A calls user B, the embodiment of using the SIM card menu to select the calling number. The user A has a business number (namely the original number: 243333), a family number (roaming number 1: 241111) and a friend number (roaming number 2: 242222).

①User A selects the calling number used for this outgoing call from the calling number menu of the SIM card;

②User A dials the phone number 249999 of user B. The SIM card automatically adds a prefix symbol before its original MSISDN number, such as ###0#243333. The prefix symbol indicates the calling number type used by user A for this call, such as roaming local number 1;

③ The mobile switching center MSC obtains the O-CSI parameter of the original MSISDN number of user A from the visitor location register VLR. The MSC reports the call to the service control point SCP or service capability server SCS specified in the O-CSI parameter according to the O-CSI parameter;

④SCP/SCS queries the information of user A according to the calling number, and converts the calling number to the number specified by user A according to the prefix symbol, such as roaming local number 1: 241111;

⑤ The SCS/SCP returns the converted calling number, that is, the roaming local number 1: 241111, to the MSC, and instructs the MSC to use the 241111 number as the calling number to connect the call to user B. In addition, this call will be billed to the roaming local number 1.

⑥The call is connected, and the roaming local number 1:241111 selected by user A is displayed on the called terminal.

An important feature of the present invention is that it can optimize call routing. It will also be briefly described below in conjunction with an embodiment shown in FIG. 3 . Referring to Fig. 3, in the figure: user A is a "roaming local number" user, has the original number 243333, the roaming local number 1: 241111 applied in the roaming network 1 and the roaming local number 2: 242222 applied in the roaming network 2. User B is located in roaming network 1. When the user A roams into the roaming network 1, the processing process of the present invention to realize route optimization is as follows:

①User B in the roaming network 1 directly dials the roaming local number 1 of user A: 241111, without dialing the international/domestic long-distance access code specified in network 1;

② The originating mobile switching center MSC obtains the T-CSI parameter registered by the roaming local number 1 from the home location register HLR of the roaming network 1 of the user A. The MSC reports the call to the service control point SCP or service capability server SCS in the roaming network 1 specified in the T-CSI parameter according to the T-CSI parameter;

③ The SCP/SCS converts the roaming local number 1 dialed by user B into its original MSISDN number: 243333 according to the information of user A stored in the database of roaming network 1;

④ The SCP/SCS interacts with the HLR of user A in the home network according to the converted original MSISDN number: 243333, and queries the current location information of user A;

⑤ The SCP/SCS returns the inquired current location information of user A to the MSC in the roaming network 1, and instructs the originating MSC to connect the call to the mobile phone of the "roaming local number" user according to the number;

⑥ The originating MSC connects the call to the MSC in the roaming network 1 where user A is currently located according to the current location information of user A, and connects to user A's mobile phone; the call is connected.

The mobile phone "roaming local number" service of the present invention can also be used in conjunction with other service characteristics, for example, the call screening function can be realized, that is, a black/white list can be set respectively for each MSISDN number: wherein the white list is only limited to receiving Calls from users in certain regions are rejected, while calls from other regions are rejected; blacklist refers to users in certain regions who reject calls and are only allowed to receive calls from other regions. It is also possible to set a respective off/on time period for each MSISDN number. The billing mode of the present invention is also quite flexible, and the billing mode of the local number applied for by the roaming network has nothing to do with the billing mode of the user in its home network: after the prepaid mobile subscriber applies for the service of using the "roaming local number", You can apply for local MSISDN numbers in multiple roaming networks; post-paid mobile users can apply for local prepaid MSISDN numbers in roaming networks.

Claims (12)

1. A method for realizing the "roaming local number" service for mobile phone users, characterized in that: the method comprises the following steps: (1) Use application: In addition to the original MSISDN number of the SIM card, the mobile user applies for a local MSISDN number from one or more mobile network operators in different roaming places, and has multiple MSISDN numbers of different networks at the same time; The added number is loaded in the related equipment of the network; (2) Number management: mobile phone users with "roaming local numbers" can use service calls provided by operators, WWW webpages, SMS or WAP/GPRS methods to access their management systems, close or activate any MSISDN number without shutting down the phone; (3) Incoming call: Other users can dial any MSISDN number of the mobile phone user of the "roaming local number" to realize the conversation with the "roaming local number" user; and if other users dial the number that is closed , the system will play the corresponding voice prompt to the user; (4) Outgoing calls: When a "roaming local number" user calls out, he can choose to use a different MSISDN number to display to the called user; (5) Routing optimization: When the "roaming local number" user is in the same network as the called party and the calling party, the system network can provide the function of optimizing the route, directly connecting the calling party to the called party in the same network without Establish two long-distance calls; and , The charging mode of the original number of the "roaming local number" user in the home network and the charging mode of the local number of the user in the roaming place may be different. 2. The method for realizing the "roaming local number" service according to claim 1, characterized in that: in the step (1), the operator loads the new local number of the "roaming local number" user into the network system The operation steps in the relevant equipment are: (11) Add a user record for the newly added local MSISDN number in the home location register HLR of the roaming mobile network; (12) In the user record, in addition to including the newly added local MSISDN number, the user's terminal CAMEL user information T-CSI parameter is also set, which includes the "roaming local number" function for incoming call control processing The SCP address information of the service control point and the keyword information of the "roaming local number" function; other mandatory parameters required by the HLR can be filled with virtual parameters; the T-CSI information of the MSISDN number is used to trigger the newly added local number Incoming calls from MSISDN numbers; (13) If the user wants the phone to be called out, use a different MSISDN number as the calling number displayed to the called party, set the originating CAMEL user information in the record of the original MSISDN number in the home location register HLR of the user's home network. -CSI parameter, which contains the SCP address information of the service control point and the keyword information of the "roaming local number" service used to control and process the "roaming local number" function; the user's call is made through the O- CSI information trigger; (14) Store the user's original MSISDN number and the newly added MSISDN number in the roaming area in the database of the intelligent network system of the roaming network. 3. The method for realizing the "roaming local number" service according to claim 1, characterized in that: in the step (3), when other users dial the original MSISDN number of the "roaming local number" mobile phone user The processing process is the same as the existing mobile phone call-in process; the operation steps of the processing process are: when other users dial the original MSISDN number of the "roaming local number" mobile phone user, the mobile switching center MSC from the user's HLR Obtain the current roaming number of the user; then connect the call to the MSC at the user's current location according to the roaming number, and connect the user's mobile phone. 4. The method for realizing the "roaming local number" service according to claim 1, characterized in that: in the step (3), when other users dial the new local MSISDN number of the "roaming local number" mobile phone user , the specific operation steps of the call processing process are as follows: (31) Other users directly dial the roaming local number of the "local roaming number" mobile phone user in the roaming network without dialing the international/domestic long-distance access code specified by the roaming network; (32) The mobile switching center MSC of the roaming network obtains the terminal CAMEL user information T-CSI parameter registered by the roaming local number dialed from the home location register HLR of the "roaming local number" user in the roaming network, and the MSC according to T-CSI parameter, report the call to the service control point SCP or service capability server SCS specified in the T-CSI parameter; (33) The SCP/SCS inquires the user information of the "roaming local number" stored in the roaming network database, and obtains that the current state of the roaming local number is closed, then proceed to the operations of steps (34) and (35) in sequence; if obtained The current state of the roaming local number is open, then perform the operations of steps (36) to (38); (34) The SCP/SCS instructs the MSC to play a voice prompt to the calling user and release the call; (35) MSC releases the call; (36) The SCP/SCS converts the roaming local number dialed by the caller to its original MSISDN number according to the user information stored in the database; (37) The SCP/SCS returns the converted original MSISDN number to the MSC, and instructs the MSC to connect the call to the mobile phone of the "roaming local number" user according to the original MSISDN number; (38) The MSC performs connection processing according to the basic call flow of the mobile network, and connects the call. 5. The method for realizing the "roaming local number" service according to claim 1, characterized in that: in the step (4), when applying for the "roaming local number" user service, the original MSISDN number can be selected as the default Provincial calling number, when the user makes an outgoing call, the connection process is the same as the normal mobile phone outgoing call process, without the control and processing of SCP/SCS, the default number will be sent to the called user and displayed on the called call the user's terminal. 6. The method for realizing the "roaming local number" service according to claim 1, characterized in that: in the step (4), when the "roaming local number" user calls out, he can use the SIM card menu, SCP/SCS Voice prompt and pre-set calling number three different methods choose to use different MSISDN numbers to display to the called user, and charge for the MSISDN number used in the call. 7. The method for implementing the "roaming local number" service according to claim 6, characterized in that: the method for selecting the outgoing call using a different MSISDN number through the menu of the SIM card is to provide the calling number selection menu by the SIM card , which is selected by the "roaming local number" user when calling out; the specific operation steps of the processing process are as follows: (411) The "roaming local number" user selects the calling number used for this outgoing call from the calling number menu of the SIM card; (412) The user dials the called user's phone number. The SIM card will automatically add a prefix symbol before the original MSISDN number, which indicates the calling number used for this call; (413) The mobile switching center MSC obtains the originating CAMEL user information O-CSI parameter of the user's original MSISDN number from the visitor location register VLR, and the MSC reports this call to the specified in the O-CSI parameter according to the O-CSI parameter Service Control Point SCP or Service Capability Server SCS; (414) The SCP/SCS queries the user's information according to the calling number, and converts the calling number into a number specified by the user according to the prefix symbol; (415) The SCS/SCP returns the converted calling number to the MSC, and instructs the MSC to use the converted number as the calling number to connect the call to the called user; in addition, this call will The calling number is billed. (416) The call is connected, and the roaming local number selected by the user is displayed on the called terminal. 8. The method for implementing the "roaming local number" service according to claim 6, characterized in that: said SCP/SCS voice prompt to select a different MSISDN number for outgoing calls is a voice prompt provided by SCP/SCS , which is selected by the "roaming local number" user when calling out; the specific operation steps of the processing process are as follows: (421) The "roaming local number" user dials the called user's phone number; (422) The mobile switching center MSC obtains the originating CAMEL user information O-CSI parameter of the original MSISDN number of the user from the visitor location register VLR; the MSC reports this call to the specified in the O-CSI parameter according to the O-CSI parameter service control point SCP; (423) The SCP controls relevant network equipment to play a prompt tone to the calling user, asking the user to select a calling number to make a call; (424) According to the selection of the calling user, the SCP returns the corresponding roaming local MSISDN number or other numbers to the MSC as the calling number: (425) The MSC connects the call to the called user according to the roaming local MSISDN number or other numbers returned by the SCP as the calling number; (426) The call is connected, and the roaming local MSISDN number or other numbers selected by the user are displayed on the called terminal, and at the same time, the calling number selected for this call will be billed. 9. The method for realizing the "roaming local number" service according to claim 6, characterized in that: the method of selecting and using a different MSISDN number by presetting the calling number is determined by the "roaming local number" "The user accesses the "roaming local number" management system through the service phone provided by the operator, WWW webpage, SMS and WAP/GPRS, and pre-sets the sent calling number; there are many types of settings: Set any number it belongs to as the default calling number. When the "roaming local number" user makes a call, the default number will be sent to the called user's mobile phone; it can also be used according to different calling positions , set a different number as the calling number; you can also set a different number as the calling number according to different time periods. 10. The method for realizing the "roaming local number" service according to claim 1, characterized in that: in the step (5), when the "roaming local number" user is in the same network as the called party and the calling party , the system network provides the function of optimizing routing, directly connects the caller to the called user in the same network, and does not need to establish two long-distance calls. The specific operation steps are as follows: (51) Other users on the same network directly dial the roaming local number of the "roaming local number" user without dialing the international/domestic long-distance access code stipulated by the network; (52) The originating mobile switching center MSC obtains the T-CSI parameter of the terminal CAMEL user information registered by the dialed roaming local number from the home location register HLR of the roaming network user of the "roaming local number", and the MSC according to the T-CSI parameter , report this call to the service control point SCP or service capability server SCS in the roaming network specified in the T-CSI parameter; (53) The SCP/SCS converts the roaming local number dialed by the caller to its original MSISDN number according to the "roaming local number" user information stored in the roaming network database; (54) The SCP/SCS interacts with the HLR of the "roaming local number" user in the home network according to the converted original MSISDN number, and queries the current location information of the user; (55) The SCP/SCS returns the inquired current location information of the "roaming local number" user to the MSC, and instructs the originating MSC to connect the call to the mobile phone of the "roaming local number" user according to the number; (56) The originating MSC connects the call to the MSC at the user's current location according to the current location information of the "roaming local number" user, and connects the user's mobile phone; the call is connected. 11. The implementation method of "roaming local number" service according to claim 1, characterized in that: the implementation method of "roaming local number" service can realize the call screening function, that is, each MSISDN number can be separately The settings are limited to receiving calls from users in certain regions and rejecting calls from other regions; or rejecting calls from users in certain regions and only allowing calls from other regions. 12. The implementation method of the "roaming local number" service according to claim 1, characterized in that: the implementation method of the "roaming local number" service can set the respective off/on for each MSISDN number time period.

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