CN100417272C - A method for number portability between mobile communication systems - Google Patents

Abstract

The invention discloses a number portability method between mobile communication networks. Firstly, the user applies for the setting of the number portability service, and then processes the incoming call and the outgoing call respectively. The incoming call step is: the user dials the user's original number, calls Connect to the exchange that the original number of the user belongs to; the exchange unconditionally transfers the call to the gateway mobile switching center/signaling switching point of the CDMA network, indicating that this call is a forwarded call; sends a location request command to the home location register; the home location register returns to the user The trigger address parameter; the signaling switching point sends an originating request command to the signaling control point to which the user’s new number belongs according to the signaling control point address specified in the parameter, and the parameter in the command indicates that the call is a forwarding call and the forwarding call Number transfer; the present invention utilizes the existing signaling process and parameters: the display number can carry the function of the user's original phone number. The implementation method is simple and easy, without any modification to the existing network.

Description

A method for number portability between mobile communication systems

technical field

The invention relates to a method for number portability after mobile phone transfer between networks in a mobile communication system, in particular to a method for number portability between a GSM network and a Code Division Multiple Access (CDMA) network.

Background technique

Number portability, referred to as Number Portability, includes the following meanings: the number remains unchanged after changing the geographical location, that is, the user still uses the original phone number when calling after changing the geographical location; the number after changing the operator Unchanged: that is, in a multi-operator environment, the user changes the operator and still uses the original phone number when making a call; the number remains unchanged after changing the service: after the user changes from one service to another, the The original phone number is still used when called.

For the CDMA system, the number portability mainly refers to the second aspect, that is, the number portability service after changing the operator.

The opening of China Unicom's CDMA network makes China Unicom a communication operator with both GSM and CDMA networks. The users of the original GSM network may choose to join the CDMA network due to various considerations. At the same time, these users do not want to bring various inconveniences to them due to changing the network number. Therefore, after the user switches to the CDMA network, he hopes to allow the user to continue to use the previous number as his called number, or to notify the calling party within a period of time that the called user has moved to a new number. It is impossible for a mature communication operator to turn a blind eye to the above-mentioned needs of users. Therefore, the operator must actively respond technically and find a feasible technical solution.

Contents of the invention

The technical problem to be solved by the present invention is to propose a method for number portability between mobile communication networks, especially a method for number portability between a GSM network and a Code Division Multiple Access (CDMA) network. The original user can move the phone without changing the number, or can not change the number for a period of time, and minimize the inconvenience caused to the original user after moving the phone.

The invention proposes a method for number portability between mobile communication networks. Firstly, the user applies for the setting of the number portability service, and then separately processes the number portability incoming call and the number portability outgoing call. The number portability of the number portability The steps are:

1) The number dialed by the user can carry the original number of the user, and the exchange will transfer the call unconditionally to the gateway mobile switching center/signaling switching point of the CDMA network, and the instruction indicates that the call is a forwarding call;

2) The signaling exchange point sends a location request instruction to the home location register, and the home location register returns the trigger address parameter of the user to the signaling exchange point;

3) The signaling switching point sends an originating request instruction to the signaling control point to which the user's new number belongs according to the address of the signaling control point specified in the parameter, and the instruction uses the parameter to indicate that this call is a forwarding call and a forwarding number;

4) The signaling control point returns an information analysis response to the signaling switching point, and the parameter terminal list in the response contains a number that can carry the user's new number. The signaling switching point connects the call according to the user's new number; The control point sends a command indicating the start of the call

5) After the call is completed, the user hangs up, the signaling switching point sends the called party disconnection instruction to the signaling control point, and the signaling control point returns the called party disconnection response;

The steps that the number can be carried as the calling party are:

A number can carry the user to initiate a call, the call is connected to the signaling switching point, the signaling switching point triggers the intelligent service, and sends the originating request command to the signaling control point to which the user belongs;

B The signaling control point returns the originating request response, and the signaling switching point continues to send information analysis instructions;

C The signaling control point returns an information analysis response, indicating that the number can carry the original number of the user, and the signaling switching point will connect the call to the called party. During the connection process, the calling number is a number that can carry the original number of the user;

D If the connection is successful, the called party answers, and the signaling switching point sends the called party's answering command to the signaling control point.

The method for number portability from the CDMA network to the GSM network as mentioned above is characterized in that: if the user has applied for the recording notification prompt service (that is, in a certain period of time, prompting the caller user to change the number), then in the above In step 3), also include

a The signaling control point decides to play the number change notice to the caller according to the forwarding instruction and the forwarding number in the parameters, and sends a resource application command to the IP, and the intelligent peripheral returns resource response information with intelligent peripheral routing;

b The signaling control point sends the routing information of the smart peripheral to the signaling switching point through the resource connection command, and the signaling switching point connects the call to the smart peripheral according to the routing information of the smart peripheral;

c The connection is successful, and the intelligent peripheral device sends an instruction to the signaling control point to request the recording notification parameters;

d The signaling control point returns a resource command to the smart peripheral, which includes a recording notification parameter, and the smart peripheral plays the number change notification tone to the caller accordingly.

The method proposed by the present invention skillfully utilizes the existing signaling process and parameters: utilizes the combination of incoming call screening process and parameter forwarding indication (DMH_REDIND) and forwarding number (REDNUMDIGITS) in the information analysis request (ANLYZD) message to realize forwarding to The user provides the notification tone function for number change, and uses the parameter display text (DISPLAYTXT) in the information analysis response (anlyzd) message to realize the function that the displayed number can carry the user's original phone number. This implementation is simple and easy, without any modification to the existing network.

Description of drawings

Fig. 1 is the flow chart of incoming call (as called) in the mobile method of number described in the present invention:

Fig. 2 is a flow chart of an outgoing call (as a calling party) in the number moving method of the present invention.

Detailed ways

The present invention is mainly realized by adopting an intelligent business mode, and its core task is to utilize this intelligent business mode to provide the following business functions:

Incoming call function: the call to the original phone number of the number portability user is transferred to the new number of the number portability user;

Outgoing call function (optional): When the user chooses this service, the original phone number of the number portability user will be displayed when the number portability user initiates a call, this function is optional;

Validity period: Determine the length of time that the number can carry the user's original phone number, whether it is a short time or a long time;

Recording notification prompt (optional): If you only keep the original phone number of the portable number user for a short time, when the user dials the portable number user as the original number, it is necessary to play a recording notification to the calling user to inform the calling user that the number is portable User's new number. This feature is optional.

Fig. 1 and Fig. 2 are a specific embodiment of the present invention. Figure 1 shows the process steps of an incoming number portability call. Here, it is assumed that user B needs to apply for the number portability service for mobile phone migration from the GSM network to the CDMA network, and the following application steps must be completed:

1) Set call forwarding unconditionally to number C (CDMA user) in the user attributes of user B;

2) Set user C as a smart user in the user attributes of user C;

3) Store user B's number in the signaling control point corresponding to user C, and set service characteristics, which indicate whether to play a number change notification tone to the calling party.

Referring to Figure 1, the steps for portability of incoming calls from the GSM network to the CDMA network are as follows:

The following signaling abbreviations come from the is771 and is826 protocols. For the convenience of the following description, a comparison table is specially listed.

LOCREQ: Location Request

Locreq: Location Request Response

ANLYZD: Information Analysis Request

anlyzd: information analysis response

ORREQ: originating request

Orreq: originating response

SEIZERES: Resource Application

seizeres: resource response

CONNRES: resource connection

INSTREQ: instruction request

instreq: command response

IAI: Initial address message with additional information

Number portability is available for incoming calls, and the call is connected to the switch to which the original number of the number portability user belongs; the switch unconditionally transfers the call to the CDMA gateway mobile switching center/signaling switching point, and sends IAI signaling to the gateway mobile switching center/signaling switching point , the instruction indicates that this call is a forwarded call;

The signaling exchange point sends a LOCREQ instruction to the home location register, and the value of the parameter TRIGETYPE in the instruction is set to Mobile_Term;

The HLR returns the user's TRIGADDRLIST;

The signaling switching point sends an ORREQ command to the signaling control point to which the user's new number belongs according to the signaling control point address specified in the parameter TRIGADDRLIST, and the parameter DMA_REDIND in the command indicates that this call is a forwarding call;

The signaling control point decides to play the number change notification to the calling party, and sends the SEIZERES command to the smart peripheral;

The intelligent peripheral sends back the seizeres response, and the response contains the routing information of the intelligent peripheral;

The signaling control point sends the routing information of the intelligent peripheral to the signaling switching point through the CONNRES command;

The signaling switching point connects the call to the smart peripheral according to the routing information of the smart peripheral;

The intelligent peripheral device sends the INSTREQ instruction to the signaling control point to request to play the sound to the user;

The signaling control point sends the SRFDIR command to the smart peripheral, and the command contains a number change notification tone;

The smart peripheral plays a notification tone to the calling user;

After playing the sound, the smart peripheral sends back the srfdir response;

The signaling control point returns the anlyzd response to the signaling switching point, and returns the instreq response to the intelligent peripheral;

The signaling exchange point is removed to the intelligent peripheral voice channel, and the voice channel to the number that can carry the user's new number is established;

If the connection is successful, the signaling exchange point sends a TANSWER command to the signaling control point to indicate the start of the call;

After the call is completed, the user hangs up, and the signaling switching point sends the called disconnection command TDISCONNECT to the signaling control point;

The signaling control point returns the called disconnection response command tdisconnect.

The above is assuming that user B requests to keep the original number for a period of time, and at this time, it is necessary to play a number change notification tone to the calling party.

Combined with Figure 2, at this time the number can be ported for outgoing calls, and user B has registered the outgoing call function. The specific steps are:

The number can carry the user to make a call, and the call is connected to the signaling switching point;

The signaling switching point triggers the intelligent service and sends an ORREQ command to the signaling control point to which the user belongs;

The signaling control point sends back an orreq response;

The signaling switching point continues to send the ANLYZDREQ command;

The signaling control point sends back the anlyzdreq response, which contains the parameter DISPLAYTXT, indicating that the number can carry the original number of the user;

The signaling switching point connects the call to the called party. During the connection process, the calling number is the number and can carry the original number of the user;

The connection is successful, the called party answers, and the signaling switching point sends the command TANSWER to the signaling control point;

After the call is completed, the user hangs up, and the signaling switching point sends the called disconnection command TDISCONNECT to the signaling control point;

The signaling control point sends back the called disconnection response command tdisconnect.

Claims (3)

1. the method capable of carrying number between a mobile communication network at first carries out the setting of user applies number portability business, handles calling of number portability and the outgoing of number portability then respectively, and the step of described number portability calling is:

1) calling user dials number portability user original number, switch will be called out the service switch point of unconditional branch to the CDMA net, indicate this calling in the instruction and be forwarded calls;

2) service switch point sends the position requests instruction to called subscriber's new digit place attaching position register, and attaching position register returns called subscriber's trigger address parameter and gives the service switch point;

3) service switch point sends the origination request instruction according to signaling control point under called subscriber's new digit, address, signaling control point specified in the parameter, and indicating this calling with parameter in the instruction is forwarded calls and transferred number;

4) write in reply to the service switch point and cease analyzing responding in the signaling control point, carries called subscriber's new digit in the response, and the service switch point is according to called subscriber's new digit replay call; Continue successfully, the service switch point sends the instruction of indication conversation beginning to the signaling control point;

5) talk-through, user's on-hook, the service switch point sends the called instruction of taking out stitches to the signaling control point, and the called response of taking out stitches is returned at the signaling control point;

Described number portability outgoing step is:

A number portability user makes a call, and call proceeding is to the service switch point, the service switch point trigger intelligent business, and the signaling control point sends the origination request instruction under number portability user;

The response of B signaling control point loopback origination request, service switch point continue to send the information analysis instruction;

The loopback information analysis response of C signaling control point indicates number portability user original number, and to called, calling number is a number portability user original number in the handshaking procedure with call proceeding in the service switch point;

D continues successfully, called party answer, and the service switch point sends the called party answer instruction to the signaling control point.

2. method capable of carrying number according to claim 1 is characterized in that: in above-mentioned steps 3) in, also comprise

Changed number notification should be play to caller according to preceding commentaries on classics indication in the parameter and transferred number decision in a signaling control point, sends resource bid instruction, the resource response information of ip intelligent peripherals loopback band ip intelligent peripherals route to ip intelligent peripherals;

B signaling control point brings the service switch point with the routing iinformation of ip intelligent peripherals by the resource link order, the service switch point according to the routing iinformation of ip intelligent peripherals with call proceeding to ip intelligent peripherals;

C continues successfully, and ip intelligent peripherals sends instruction to the signaling control point, request recorded announcement parameter;

The resource instruction is returned to ip intelligent peripherals in d signaling control point, band recorded announcement parameter in the instruction, and ip intelligent peripherals is play the changed number notification sound to caller in view of the above.

3. method capable of carrying number according to claim 1 is characterized in that: the described setting of carrying out the user applies number portability business, need finish following procedure to apply:

1) the number C of calling Call Forwarding Unconditional to CDMA user is set in the user property of GSM network users B;

2) user property of CDMA user's number C is set to intelligent subscriber;

3) preserve the number of GSM network users B in the pairing signaling of user C control point, and traffic performance is set, whether characteristic indicates needs to play the changed number notification sound to caller.

Images