CN102111738A - Method, mobile switching centre (MSC) and system for preventing voice calling forward trap at calling side - Google Patents

Method, mobile switching centre (MSC) and system for preventing voice calling forward trap at calling side Download PDF

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Publication number
CN102111738A
CN102111738A CN2011100447789A CN201110044778A CN102111738A CN 102111738 A CN102111738 A CN 102111738A CN 2011100447789 A CN2011100447789 A CN 2011100447789A CN 201110044778 A CN201110044778 A CN 201110044778A CN 102111738 A CN102111738 A CN 102111738A
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China
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called
hlr
information
audio call
caller
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CN2011100447789A
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Chinese (zh)
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CN102111738B (en
Inventor
肖杰
张振华
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ZTE Corp
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ZTE Corp
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Priority to CN201110044778.9A priority Critical patent/CN102111738B/en
Publication of CN102111738A publication Critical patent/CN102111738A/en
Priority to PCT/CN2012/071372 priority patent/WO2012113321A1/en
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Publication of CN102111738B publication Critical patent/CN102111738B/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/54—Arrangements for diverting calls for one subscriber to another predetermined subscriber
    • H04M3/541—Arrangements for diverting calls for one subscriber to another predetermined subscriber based on information specified by the calling party
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/38—Graded-service arrangements, i.e. some subscribers prevented from establishing certain connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2203/00—Aspects of automatic or semi-automatic exchanges
    • H04M2203/20—Aspects of automatic or semi-automatic exchanges related to features of supplementary services
    • H04M2203/2005—Temporarily overriding a service configuration
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2203/00—Aspects of automatic or semi-automatic exchanges
    • H04M2203/20—Aspects of automatic or semi-automatic exchanges related to features of supplementary services
    • H04M2203/2033—Call handling or answering restrictions, e.g. specified by the calling party

Abstract

The invention relates to a method, mobile switching centre (MSC) and system for preventing a voice calling forward trap at a calling side. The method comprises the following steps: acquiring intercept voice calling forwarding functional signature information from a calling home location register (HLR) by a calling MSC; acquiring called user forwarding information from a called HLR; and controlling the voice calling of a calling user according to the signature information and the forwarding information. In the invention, a user-stage voice calling forwarding intercept signature function is provided by utilizing the HLRs; the HLRs are combined with MSC/visitor location register (VLR), once the calling user signs the function and dials other numbers, the calling MSC/VLR finds that the calling user signs voice calling forwarding intercept if based on the fact that a called number is forwarded or is to be forwarded, the calling is terminated and is not connected, thereby avoiding the voice calling forwarding trap; and the HLP also provides an temporarily opened or exceeded intercept voice calling forwarding function, service can be convenient for application and popularization, the existing network resources are fully utilized, and the cost is saved.

Description

The method, MSC and the system that change trap before the Calling Side prevention audio call
Technical field
The present invention relates to the mobile communication technology field, relate in particular to a kind of Calling Side and initiatively prevent preceding method, MSC and the system that changes trap of audio call.
Background technology
In daily life; people receive the phone that some are strange through regular meeting; these phones often ring once with regard to on-hook; this class telephone number and domestic common number are without any difference; when people press this telephone number clawback; can hear that then some advertisements, prize-winning or the like advertisement information or possibility are before forwarded on certain information service center, such as being access in into external pornographic chat or reaction referral centre, some lawless person can therefrom collect transit rate usefulness.Change one's profession before these malice to the life to people not only brings harassing and wrecking, also can produce loss individual telephone expenses and operator's telephone expenses.
At present, equipment of the core network (comprising HLR, MSC etc.) according to change one's profession before the uncontrollable this malice of standard agreement into.For HLR, only be responsible for judging before whether the called subscriber has and change authority whether authorize, transferred number had or not call out authority etc. such as preceding commentaries on classics, and can't judge whether this called number may be the malice number; For MSC, only be responsible for called route and continue, whether suspicious powerless especially to detecting called number.Therefore, can't prevent especially to change trap before the audio call for Calling Side.
Summary of the invention
Main purpose of the present invention is to provide method, MSC and the system that changes trap before a kind of Calling Side prevention audio call, the fail safe that is intended to improve calling subscriber's audio call.
In order to achieve the above object, the present invention proposes the preceding method of changeing trap of a kind of Calling Side prevention audio call, comprising:
Calling mobile exchanging center MSC from caller attaching position register HLR obtain the interception audio call before the rotating function CAMEL-Subscription-Information; Obtain called subscriber's Redirection Information from called HLR; Audio call according to described CAMEL-Subscription-Information and Redirection Information control calling subscriber.
Preferably, described CAMEL-Subscription-Information comprises: whether the calling subscriber authorizes is opened or closes the preceding rotating function of interception audio call and authorize ability information; Described mandate ability information comprise temporary unlatching or close, permanent unlatching or close, activate temporarily or deactivation interception audio call before rotating function.
Preferably, the mode of rotating function CAMEL-Subscription-Information comprised before described caller MSC obtained the interception audio call from caller HLR: caller MSC/VLR initiates enroll in notifications or qualification application to caller HLR, and perhaps described caller HLR initiates the qualification instruction to caller MSC/VLR.
Preferably, describedly obtain called subscriber's Redirection Information from called HLR; Step according to described CAMEL-Subscription-Information and Redirection Information control calling subscriber's audio call comprises:
When the calling subscriber initiated audio call, described caller MSC initiated the position solicitation message to called HLR;
Receive the position application response message that carries preceding commentaries on classics indication and destination Mobile Station International ISDN Number that described called HLR is returned;
Change being designated as when changeing before called before described, from described CAMEL-Subscription-Information, obtain the calling subscriber and whether open rotating function before the interception audio call, if then end call discharges described destination Mobile Station International ISDN Number; Otherwise, continue to described destination Mobile Station International ISDN Number.
Preferably, describedly obtain called subscriber's Redirection Information from called HLR; Step according to described CAMEL-Subscription-Information and Redirection Information control calling subscriber's audio call comprises:
When the calling subscriber initiated audio call, described caller MSC initiated the position solicitation message to called HLR;
Receive the position application response message that carries routing information that described called HLR is returned;
Be set up to the speech path of called MS C according to described position application response message;
When called subscriber busy or no response and called subscriber activate the Call Forwarding ability, receive the changed course that carries that called MS C sends and exhale the changed course of reason to exhale solicitation message more again;
From described CAMEL-Subscription-Information, obtain the calling subscriber whether open the interception audio call before rotating function, if, then end call; Otherwise, send the transferred number solicitation message to called HLR, obtain corresponding transferred number.
Preferably, describedly obtain called subscriber's Redirection Information from called HLR; Step according to CAMEL-Subscription-Information and Redirection Information control calling subscriber's audio call comprises:
Rotating function transient state activates or during the deactivation Supplementary Service Code, caller MSC initiates to carry the supplementary service solicitation message of dialed digit to caller HLR before the calling subscriber provides the interception audio call;
Receive described caller HLR and carry the supplementary service application response message that changes extended field information before the interception audio call according to what described supplementary service solicitation message and CAMEL-Subscription-Information returned;
Make a call to the called subscriber according to described supplementary service application response message and by called HLR;
When before the called subscriber is taken place, changeing, from described supplementary service application response message, obtain the calling subscriber and whether open rotating function before the interception audio call; If, then end call; Otherwise, continue to transferred number or obtain transferred number.
The present invention also proposes the preceding MSC that changes trap of a kind of Calling Side prevention audio call, comprising:
The CAMEL-Subscription-Information acquisition module, be used for from caller HLR obtain the interception audio call before the rotating function CAMEL-Subscription-Information;
The preceding control module of changeing is used for obtaining called subscriber's Redirection Information from called HLR; Audio call according to described CAMEL-Subscription-Information and Redirection Information control calling subscriber.
Preferably, the mode of rotating function CAMEL-Subscription-Information comprised before described caller MSC obtained the interception audio call from caller HLR: caller MSC/VLR initiates enroll in notifications or qualification application to caller HLR, and perhaps described caller HLR initiates the qualification instruction to caller MSC/VLR.
Preferably, the described preceding control module of changeing comprises:
First transmitting element is used for when the calling subscriber initiates audio call, initiates the position solicitation message to called HLR;
First receiving element is used to receive the position application response message that carries preceding commentaries on classics indication and destination Mobile Station International ISDN Number that described called HLR is returned;
First acquiring unit is used for changeing before described being designated as when changeing before called, obtains the calling subscriber and whether open rotating function before the interception audio call from described CAMEL-Subscription-Information;
Change control unit before first, be used for changeing before described being designated as and change before called and calling subscriber when opening the preceding rotating function of interception audio call, end call discharges described destination Mobile Station International ISDN Number; Otherwise, continue to described destination Mobile Station International ISDN Number.
Preferably, the described preceding control module of changeing comprises:
Second transmitting element is used for when the calling subscriber initiates audio call, initiates the position solicitation message to called HLR;
Second receiving element is used to receive the position application response message that carries routing information that described called HLR is returned; And, receive the changed course that carries that called MS C sends and exhale the changed course of reason to exhale solicitation message more again when after the speech path of setting up with called MS C, when called subscriber busy or no response and called subscriber activate the Call Forwarding ability;
The first call setup unit is used for applying for that according to described position response message is set up to the speech path of called MS C;
Second acquisition unit, be used for from described CAMEL-Subscription-Information obtain the calling subscriber whether open the interception audio call before rotating function;
Change control unit before second, be used for when the calling subscriber opens the preceding rotating function of interception audio call end call; Otherwise, send the transferred number solicitation message to called HLR, obtain corresponding transferred number.
Preferably, the described preceding control module of changeing comprises:
The 3rd transmitting element is used for initiating to carry the supplementary service solicitation message of dialed digit to caller HLR when the calling subscriber provides the preceding rotating function transient state of interception audio call to activate or deactivates Supplementary Service Code;
The 3rd receiving element is used to receive described caller HLR and carries the supplementary service application response message that changes extended field information before the interception audio call according to what described supplementary service solicitation message and CAMEL-Subscription-Information returned;
The second call setup unit is used for making a call to the called subscriber according to described supplementary service response message and by called HLR;
The 3rd acquiring unit when being used for changeing before the called subscriber is taken place, obtaining the calling subscriber and whether opens rotating function before the interception audio call from described supplementary service application response message;
Change control unit before the 3rd, be used for when the calling subscriber opens the preceding rotating function of interception audio call end call; Otherwise, continue to transferred number or obtain transferred number.
The present invention also proposes the preceding system that changes trap of a kind of Calling Side prevention audio call, comprising: HLR and MSC/VLR, wherein:
Described HLR is used for the registered user and tackles the preceding rotating function CAMEL-Subscription-Information of audio call;
Described MSC/VLR is used for obtaining the user from described HLR and tackles rotating function CAMEL-Subscription-Information before the audio call, obtains called subscriber's Redirection Information from called HLR; And control described user's voice according to described CAMEL-Subscription-Information and Redirection Information and call out.
Preferably, described MSC comprises:
The CAMEL-Subscription-Information acquisition module is used for changeing CAMEL-Subscription-Information before caller HLR obtains the interception voice call function;
The preceding control module of changeing is used for obtaining called subscriber's Redirection Information from called HLR; Audio call according to described CAMEL-Subscription-Information and Redirection Information control calling subscriber.
The method, MSC and the system that change trap before a kind of Calling Side prevention audio call that the present invention proposes, change the interception sign on function before using HLR that the user class audio call is provided, and with HLR and MSC/VLR associating, this function in case the calling subscriber contracts, when dialing other number, if preceding commentaries on classics has taken place or preceding the commentaries on classics will have been taken place based on this called number, caller MSC/VLR finds to change interception before the signatory audio call of calling subscriber, then active termination is called out, do not continue, avoided changeing trap before the audio call, improved the fail safe of calling subscriber's audio call; Simultaneously, rotating function before HLR also provides interim unlatching or crosses the interception audio call makes things convenient for this professional application.The present invention is very little for core network element HLR and MSC/VLR transformation, is easy to realize, makes full use of conventional network resources, saves cost.
Description of drawings
Fig. 1 is the NO7 schematic network structure that the embodiment of the invention relates to;
Fig. 2 is the method one embodiment schematic flow sheet that changes trap before the Calling Side prevention audio call of the present invention;
Fig. 3 is that HLR cooperates with MSC/VLR and supports the REGNOT schematic flow sheet of rotating function before the interception audio call in the foregoing description;
Fig. 4 is that HLR cooperates with MSC/VLR and supports the QUALREQ schematic flow sheet of rotating function before the interception audio call in the foregoing description;
Fig. 5 is the QUALDIR schematic flow sheet that rotating function before the interception audio call is supported in HLR and MSC/VLR cooperation in the foregoing description;
Fig. 6 obtains called subscriber's Redirection Information from called HLR in the foregoing description; A kind of execution mode schematic flow sheet according to CAMEL-Subscription-Information and Redirection Information control calling subscriber's audio call;
The HLR that Fig. 7 is based on execution mode shown in Figure 6 cooperates with MSC/VLR and supports the LOCREQ schematic flow sheet of rotating function before the interception audio call;
Fig. 8 obtains called subscriber's Redirection Information from called HLR in the foregoing description; Another kind of execution mode schematic flow sheet according to CAMEL-Subscription-Information and Redirection Information control calling subscriber's audio call;
Fig. 9 is based on the REDREQ schematic flow sheet that rotating function before the interception audio call is supported in cooperation between the MSC/VLR of execution mode shown in Figure 8;
Figure 10 obtains called subscriber's Redirection Information from called HLR in the foregoing description; Another execution mode schematic flow sheet according to CAMEL-Subscription-Information and Redirection Information control calling subscriber's audio call;
Figure 11 is based on that the HLR of execution mode shown in Figure 10 and MSC/VLR cooperation support that rotating function activates before the interception audio call, deactivation or revise interception mandate ability the FEATREQ schematic flow sheet;
Figure 12 is based on the HLR and the MSC/VLR cooperation of execution mode shown in Figure 10 and supports the transient state of the preceding rotating function of interception audio call to activate or deactivation FEATREQ flow chart;
Figure 13 is the MSC one example structure journey schematic diagram that changes trap before the Calling Side prevention audio call of the present invention;
Figure 14 changes a kind of structure journey of control module schematic diagram before changeing among MSC one embodiment of trap before the Calling Side of the present invention prevention audio call;
Figure 15 changes the another kind of structure journey of control module schematic diagram before changeing among MSC one embodiment of trap before the Calling Side of the present invention prevention audio call;
Figure 16 changes another structure journey schematic diagram of control module before changeing among MSC one embodiment of trap before the Calling Side of the present invention prevention audio call;
Figure 17 is the system's one example structure schematic diagram that changes trap before the Calling Side prevention audio call of the present invention.
In order to make technical scheme of the present invention clearer, clear, be described in further detail below in conjunction with accompanying drawing.
Embodiment
Solution for embodiment of the invention mainly is to provide the user to tackle rotating function CAMEL-Subscription-Information before the audio call by HLR, when the user carries out audio call, MSC/VLR controls this user's voice Call Forwarding to change trap avoiding before, raising user safety in utilization according to obtain the dial mode that the user tackles rotating function CAMEL-Subscription-Information before the audio call and user from HLR at Calling Side.
Embodiment of the invention running environment relates to based on NO7 server net, and in the NO7 network structure as shown in Figure 1, MT (portable terminal) accesses to core net by wireless network; MSC (Mobile Switching Center, mobile switching centre), VLR (Visitor Location Register, VLR Visitor Location Register), HLR (Home Location Register, attaching position register) is the standard network element of core net in the NO7 network with AUC (AUC), MSC is a mobile switching centre, be responsible for to call out, the user continues, VLR is a VLR Visitor Location Register, be used for storing user's CAMEL-Subscription-Information temporarily, HLR is an attaching position register, is used for forever preserving user's CAMEL-Subscription-Information and preserves user position information in real time; Carry out communication by the NO7 signaling network between core network element MSC, VLR and the HLR.
As shown in Figure 2, one embodiment of the invention proposes a kind of method based on commentaries on classics trap before the Calling Side prevention audio call of above-mentioned network configuration, associating HLR and MSC/VLR, comprising:
Step S101, caller MSC from caller HLR obtain the interception audio call before the rotating function CAMEL-Subscription-Information;
HLR changes sign on function before user class interception audio call is provided in the present embodiment, and the user can select to authorize and open this function, and clearly is temporary On/Off, still permanent On/Off; HLR also provides preceding rotating function activation/deactivation stable state of interception audio call and transient state Supplementary Service Code simultaneously, so that the user can independently open or close this function, activates temporarily/deactivate the preceding rotating function of interception audio call when perhaps calling out.
The user can be by portable terminal rotating function before the signatory interception of HLR registration audio call, also can handle this function by the business information desk, HLR will preserve the preceding rotating function CAMEL-Subscription-Information of interception audio call of user's registration, and this CAMEL-Subscription-Information comprises: whether the calling subscriber authorizes is opened or closes the preceding rotating function of interception audio call and authorize ability information; Authorize ability information to comprise temporary unlatching or close, permanent unlatching or close, activate temporarily or deactivation interception audio call before rotating function.Simultaneously, when user's start or other scenes, HLR correctly carries these CAMEL-Subscription-Information and gives MSC/VLR in other parameter of service item inventory (Profile) or expansion, notify MSC/VLR user's the preceding rotating function CAMEL-Subscription-Information of interception audio call, maintenance in real time is synchronous with the MSC/VLR CAMEL-Subscription-Information.
The present embodiment user is the caller user, caller MSC obtains before calling subscriber's the interception audio call rotating function CAMEL-Subscription-Information and preserves from caller HLR in conjunction with VLR, caller MSC obtains the calling subscriber from caller HLR and tackles that the mode of rotating function CAMEL-Subscription-Information comprises before the audio call: caller MSC/VLR initiates enroll in notifications (REGNOT) or qualification application (QUALREQ) to caller HLR, and perhaps caller HLR initiatively initiates qualification instruction (QUALDIR) to caller MSC/VLR.
Step S102 obtains called subscriber's Redirection Information from called HLR; Audio call according to CAMEL-Subscription-Information and Redirection Information control calling subscriber.
In the present embodiment, when the calling user dials called number, if based on this called number preceding commentaries on classics has taken place, in the time of perhaps will going to obtain transferred number, caller MSC in conjunction with VLR according to the user's of calling subscriber's dial mode and preservation interception audio call before the signatory situation of rotating function tackle, in the Call Forwarding of Calling Side control user's voice, realize changeing permanent interception before the audio call, permanently not tackling; Change before the perhaps interim audio call of tackling or not tackling in this communication process etc.
Calling subscriber's dial mode comprises common dial mode and special dial mode, and special dial mode is meant that the user dials and carries in the numeral that transient state activates or deactivation audio call forward-shifting service sign indicating number adds called number.
In the present embodiment, according to the CDMA41D agreement, the rotating function CAMEL-Subscription-Information is that the rotating function CAMEL-Subscription-Information related to REGNOT, QUALDIR and three kinds of application scenarioss of QUALREQ before caller MSC/VLR obtained the calling subscriber and tackles audio call before caller HLR notice caller MSC/VLR user's the interception audio call, respectively corresponding diagram 3, Fig. 4 and Fig. 5.
As shown in Figure 3, for cooperating with caller MSC/VLR, caller HLR supports REGNOT (enroll in notifications) flow chart of rotating function before the interception audio call.
Suppose calling subscriber's rotating function before caller HLR authorizes the interception audio call of registration, and open and activate that its flow process is as follows:
Step 21, caller HLR receives the enroll in notifications message REGNOT of caller VLR-1;
Step 22, caller HLR finds that the active user in caller VLR-2 registration, sends the cancellation registration message to caller VLR-2;
Step 23, caller VLR-2 returns response message;
Step 24, caller HLR finds the preceding rotating function of the signatory interception of user audio call, correctly carries these CAMEL-Subscription-Information and give caller VLR-1 in service item inventory (Profile), caller VLR-1 preserves this CAMEL-Subscription-Information.
As shown in Figure 4, for cooperating with caller MSC/VLR, caller HLR supports QUALREQ (qualification application) flow chart of rotating function before the interception audio call.
Suppose calling subscriber's rotating function before caller HLR authorizes the interception audio call of registration, and open and activate that its flow process is as follows:
Step 31, caller HLR receives the qualification solicitation message QUALREQ of caller VLR.
Step 32, caller HLR finds the preceding rotating function of the signatory interception of user audio call, correctly carries these CAMEL-Subscription-Information and give caller VLR in service item inventory (Profile), caller VLR preserves this CAMEL-Subscription-Information.
As shown in Figure 4, for cooperating with caller MSC/VLR, caller HLR supports QUALDIR (qualification instruction) flow chart of rotating function before the interception audio call.
Suppose calling subscriber's rotating function before caller HLR authorizes the interception audio call of registration, and open and activate that its flow process is as follows:
Step 41, caller HLR finds the preceding rotating function of the signatory interception of user audio call, correctly carries these CAMEL-Subscription-Information and give caller VLR in service item inventory (Profile);
Step 42, caller VLR preserves this CAMEL-Subscription-Information, and caller VLR returns qualdir qualification commanded response message and gives caller HLR.
As shown in Figure 6, as a kind of execution mode that changes control before the audio call, above-mentioned steps S102 comprises:
Step S1021, when the calling subscriber initiated audio call, caller MSC initiated the position solicitation message to called HLR;
Step S1022 receives the position application response message that carries preceding commentaries on classics indication and destination Mobile Station International ISDN Number that called HLR is returned;
Step S1023, current commentaries on classics is designated as when changeing before called, obtains the calling subscriber and whether open rotating function before the interception audio call from CAMEL-Subscription-Information, if then enter step S1024; Otherwise, enter step S1025;
Caller MSC from caller VLR, obtain the calling subscriber whether open the interception audio call before rotating function.
Step S1024, end call discharges destination Mobile Station International ISDN Number;
Step S1025 continues to destination Mobile Station International ISDN Number.
As shown in Figure 7, as the LOCREQ application scenarios of above-mentioned execution mode shown in Figure 6, be specially called HLR and caller MSC/VLR cooperation and support that LOCREQ (position application) flow process of the preceding rotating function of interception audio call is as follows:
Step 51, called HLR receive the position application LOCREQ message that caller MSC1 initiates;
Step 52 if called HLR finds it is station to station call, sends route application ROUTREQ to the VLR2 of called subscriber's registration, otherwise changes step 54;
Step 53, VLR2 returns route numeral TLDN to called HLR;
Commentaries on classics condition before step 54, called HLR satisfy according to existing 41D agreement judgement called subscriber, home position application response message is given caller MSC1, if called HLR is directly judged when preceding the commentaries on classics taken place, changes indication before can carrying to caller MSC1.
Step 55, caller MSC1 obtains caller and whether opens rotating function before the interception audio call from caller VLR, if open, then end call if open interception, then continues to continue to transferred number.
As shown in Figure 8, as the another kind of execution mode that changes control before the audio call, above-mentioned steps S102 comprises:
Step S1026, when the calling subscriber initiated audio call, caller MSC initiated the position solicitation message to called HLR;
Step S1027 receives the position application response message that carries routing information that called HLR is returned;
Step S1028 applies for that according to the position response message is set up to the speech path of called MS C;
Step S1029 when called subscriber busy or no response and called subscriber activate the Call Forwarding ability, receives the changed course that carries that called MS C sends and exhales the changed course of reason to exhale solicitation message more again;
Step S1030, from CAMEL-Subscription-Information, obtain the calling subscriber whether open the interception audio call before rotating function, if then enter step S1031; Otherwise, enter step S1032;
Caller MSC from caller VLR, obtain the calling subscriber whether open the interception audio call before rotating function.
Step S1031, end call;
Step S1032 sends the transferred number solicitation message to called HLR, obtains corresponding transferred number.
As shown in Figure 9, as LOCREQ, the REDREQ application scenarios of above-mentioned execution mode shown in Figure 8, the REDREQ flow process that is specially the preceding rotating function of cooperation support interception audio call between caller MSC/VLR is as follows:
Step 61, called HLR receive the position application LOCREQ message that caller MSC1 initiates;
Step 62 if called HLR finds it is station to station call, sends route solicitation message ROUTREQ to the VLR2 of called subscriber's registration, otherwise changes step 65;
Step 63, called VLR2 sends route solicitation message ROUTREQ to called MS C2;
Step 64, called MS C2 distributes a TLDN (interim local directory number) and return route numeral TLDN to called VLR2 in route response message routreq;
Step 65, called VLR2 returns route numeral TLDN to called HLR;
Step 66, called HLR are returned locreq position application response message and are given caller MSC1, comprising the routing information with the terminal list parametric form according to existing 41D agreement;
Step 67, caller MSC1 is according to the locreq that receives, and originating MS C1 adopts the speech path that is set up to called MS C2 by the rules of signalling system No.7 regulation;
Step 68, after called MS C2 receives calling between the caller MSC1, calling called subscriber, if receive page response, then ring.If the called subscriber do not respond do not reply after paging or the ring or the user busy, called MS C2 according to called service item inventory (Profile) determine nothing page reply do not have the page response state or when busy the called subscriber activated the Call Forwarding ability;
Step 69, called MS C2 sends a changed course to caller originating MS C1 and exhales solicitation message (REDREQ) again, and indication is because no page response or no response or the busy Call Forwarding that causes;
Step 70, caller MSC1 from caller VLR, obtain caller whether open the interception audio call before rotating function, if open, then end call, give calling number playback prompting simultaneously, if do not open interception, then caller originating MS C1 continues to send transferred number solicitation message (TRANUMREQ) to called HLR, the application calling forwarding number.
As shown in figure 10, as another execution mode that changes control before the audio call, above-mentioned steps S102 comprises:
Step S1033, rotating function transient state activates or during the deactivation Supplementary Service Code, caller MSC initiates to carry the supplementary service solicitation message of dialed digit to caller HLR before the calling subscriber provides the interception audio call;
Step S1034 receives caller HLR and carries the supplementary service application response message that changes extended field information before the interception audio call according to what supplementary service solicitation message and CAMEL-Subscription-Information returned;
Step S1035 makes a call to the called subscriber according to supplementary service application response message and by called HLR;
Step S1036, from supplementary service application response message, obtain the calling subscriber whether open the interception audio call before rotating function; If then enter step S1037; Otherwise enter step S1038;
Step S1037, end call;
Step S1038 continues to transferred number or obtains transferred number.
As shown in figure 11, according to CDMA 41D agreement, based on above-mentioned execution mode shown in Figure 10, HLR supports the user independently by the signatory related FEATREQ application scenarios of situation of rotating function before the current individual's interception of the Supplementary Service Code modification audio call, supposing changes sign on function before current called subscriber authorizes the interception audio call, and idiographic flow is as follows:
Step 71, caller MSC initiates supplementary service solicitation message (FEATREQ) to caller HLR, comprises dialed digit in this message.
Step 72, if caller HLR discovery user dials only to carry in the numeral and activates or the preceding rotating function Supplementary Service Code of deactivation interception audio call,, such as being * 111, caller HLR correctly preserve the calling subscriber tackle audio call before the rotating function CAMEL-Subscription-Information advance customer data base;
Step 73, caller HLR send and sends out qualification instruction message (QUALDIR), in service item inventory (Profile) rotating function CAMEL-Subscription-Information before the up-to-date interception audio call is carried to caller MSC;
Step 74, caller MSC preserves this CAMEL-Subscription-Information, and caller MSC returns the qualdir response message and gives caller HLR.
As shown in figure 12, according to CDMA 41D agreement, based on above-mentioned execution mode shown in Figure 10, HLR supports the autonomous transient state of user to activate or the preceding rotating function of deactivation interception audio call, MSC/VLR cooperates changes related FEATREQ (professional application) application scenarios before finishing interim interception or not tackling audio call in this communication process, supposing changes sign on function before current called subscriber authorizes the interception audio call, and rotating function transient state activated or the deactivation Supplementary Service Code before the interception audio call was provided, and its idiographic flow is as follows:
Step 81, caller MSC1 comprises dialed digit to initiating supplementary service solicitation message (FEATREQ) with current called HLR in this message.
Step 82, if caller HLR discovery user dials and carries transient state activation or preceding rotating function Supplementary Service Code of deactivation interception audio call and called number in the numeral, as * 110#13888888888, and current called subscriber changes sign on function before authorizing the interception audio call, and open this function transient state and activate or deactivate authority, then in the featreq response message, carry extended field, correspondence indicates whether to open the preceding rotating function of interception audio call, other parameter is correctly carried according to CDMA 41D agreement regulation, returns to caller MSC1;
Step 83, caller MSC1 changes extended field before finding to tackle audio call in the indication in the featreq response message, preserves;
Step 84, caller MSC1 initiates the calling to called number, change before taking place based on called number, the similar Fig. 7 of flow process step 51 to step 54 or Fig. 9 step 61 to step 69;
Step 85, change extended field information before the interception audio call of preserving before caller MSC1 obtains that from the featreq response message, obtains, interception if desired, then end call, give calling number playback prompting simultaneously, if do not need interception, then let pass, be routed to the response transferred number or remove to obtain transferred number.
In sum; present embodiment is by attaching position register (HLR) and the integration and cooperation of mobile switching center (MSC/VLR) equipment; provide the complete Calling Side of a cover initiatively to solve the method for changeing trap before the audio call, can initiatively protect the mobile subscriber not fall into the preceding trap that changes of audio call to greatest extent.And to the not influence of existing system performance, only need existing system is simply developed transformation and upgrade, can not increase system loading, make full use of existing resource, save cost, and greatly increase customer satisfaction degree, more help professional popularization.
As shown in figure 13, one embodiment of the invention proposes the preceding MSC that changes trap of a kind of Calling Side prevention audio call, comprising: CAMEL-Subscription-Information acquisition module 701 and preceding commentaries on classics control module 702, wherein:
CAMEL-Subscription-Information acquisition module 701, be used for from caller HLR obtain the interception audio call before the rotating function CAMEL-Subscription-Information;
The preceding control module 702 of changeing is used for obtaining called subscriber's Redirection Information from called HLR; Audio call according to CAMEL-Subscription-Information and Redirection Information control calling subscriber.
HLR changes sign on function before user class interception audio call is provided in the present embodiment, and the user can select to authorize and open this function, and clearly is temporary On/Off, still permanent On/Off; HLR also provides preceding rotating function activation/deactivation stable state of interception audio call and transient state Supplementary Service Code simultaneously, so that the user can independently open or close this function, activates temporarily/deactivate the preceding rotating function of interception audio call when perhaps calling out.
The user can be by portable terminal rotating function before the signatory interception of HLR registration audio call, also can handle this function by the business information desk, HLR will preserve the preceding rotating function CAMEL-Subscription-Information of interception audio call of user's registration, and this CAMEL-Subscription-Information comprises: whether the calling subscriber authorizes is opened or closes the preceding rotating function of interception audio call and authorize ability information; Authorize ability information to comprise temporary unlatching or close, permanent unlatching or close, activate temporarily or deactivation interception audio call before rotating function.Simultaneously, when user's start or other scenes, HLR correctly carries these CAMEL-Subscription-Information and gives MSC/VLR in other parameter of service item inventory (Profile) or expansion, notify MSC/VLR user's the preceding rotating function CAMEL-Subscription-Information of interception audio call, maintenance in real time is synchronous with the MSC/VLR CAMEL-Subscription-Information.
The present embodiment user is the caller user, caller MSC specifically obtains before calling subscriber's the interception audio call rotating function CAMEL-Subscription-Information by CAMEL-Subscription-Information acquisition module 701 in conjunction with VLR and preserves from caller HLR, caller MSC obtains the calling subscriber from caller HLR and tackles that the mode of rotating function CAMEL-Subscription-Information comprises before the audio call: caller MSC/VLR initiates enroll in notifications (REGNOT) or qualification application (QUALREQ) to caller HLR, and perhaps caller HLR initiatively initiates qualification instruction (QUALDIR) to caller MSC/VLR.
When the calling user dials called number, if based on this called number preceding commentaries on classics has taken place, in the time of perhaps will going to obtain transferred number, caller MSC in conjunction with VLR specifically by preceding commentaries on classics control module 702 according to the user's of calling subscriber's dial mode and preservation interception audio call before the signatory situation of rotating function tackle, in the Call Forwarding of Calling Side control user's voice, realize changeing permanent interception before the audio call, permanently not tackling; Change before the perhaps interim audio call of tackling or not tackling in this communication process etc.
Calling subscriber's dial mode comprises common dial mode and special dial mode, and special dial mode is meant that the user dials and carries in the numeral that transient state activates or deactivation audio call forward-shifting service sign indicating number adds called number.
As shown in figure 14, as a kind of execution mode of preceding commentaries on classics control, preceding commentaries on classics control module 702 comprises: change control unit 7024 before first transmitting element 7021, first receiving element 7022, first acquiring unit 7023 and first, wherein:
First transmitting element 7021 is used for when the calling subscriber initiates audio call, initiates the position solicitation message to called HLR;
First receiving element 7022 is used to receive the position application response message that carries preceding commentaries on classics indication and destination Mobile Station International ISDN Number that called HLR is returned;
First acquiring unit 7023 is used for current commentaries on classics and is designated as when changeing before called, obtains the calling subscriber and whether open rotating function before the interception audio call from CAMEL-Subscription-Information;
Change control unit 7024 before first, be used for when current commentaries on classics be designated as change before called and the calling subscriber open the interception audio call before during rotating function, end call, release destination Mobile Station International ISDN Number; Otherwise, continue to destination Mobile Station International ISDN Number.
As shown in figure 15, another kind of execution mode as preceding commentaries on classics control, the preceding control module 702 of changeing comprises: change control unit 7029 before second transmitting element 7025, second receiving element 7026, the first call setup unit 7027, the second acquisition unit 7028 and second, wherein:
Second transmitting element 7025 is used for when the calling subscriber initiates audio call, initiates the position solicitation message to called HLR;
Second receiving element 7026 is used to receive the position application response message that carries routing information that called HLR is returned; And, receive the changed course that carries that called MS C sends and exhale the changed course of reason to exhale solicitation message more again when after the speech path of setting up with called MS C, when called subscriber busy or no response and called subscriber activate the Call Forwarding ability;
The first call setup unit 7027 is used for being set up to according to the position response message speech path of called MS C;
Second acquisition unit 7028, be used for from CAMEL-Subscription-Information obtain the calling subscriber whether open the interception audio call before rotating function;
Change control unit 7029 before second, be used for when the calling subscriber opens the preceding rotating function of interception audio call end call; Otherwise, send the transferred number solicitation message to called HLR, obtain corresponding transferred number.
As shown in figure 16, another execution mode as preceding commentaries on classics control, the preceding control module 702 of changeing comprises: change control unit 7034 before the 3rd transmitting element 7030, the 3rd receiving element 7031, the second call setup unit 7032, the 3rd acquiring unit 7033 and the 3rd, wherein:
The 3rd transmitting element 7030 is used for initiating to carry the supplementary service solicitation message of dialed digit to caller HLR when the calling subscriber provides the preceding rotating function transient state of interception audio call to activate or deactivates Supplementary Service Code;
The 3rd receiving element 7031 is used to receive caller HLR and carries the supplementary service application response message that changes extended field information before the interception audio call according to what supplementary service solicitation message and CAMEL-Subscription-Information returned;
The second call setup unit 7032 is used for making a call to the called subscriber according to the supplementary service response message and by called HLR;
The 3rd acquiring unit 7033 when being used for changeing before the called subscriber is taken place, obtaining the calling subscriber and whether opens rotating function before the interception audio call from the supplementary service solicitation message;
Change control unit 7034 before the 3rd, be used for when the calling subscriber opens the preceding rotating function of interception audio call end call; Otherwise, continue to transferred number or obtain transferred number.
As shown in figure 17, one embodiment of the invention proposes the preceding system that changes trap of a kind of Calling Side prevention audio call, comprising: HLR1101 and MSC/VLR1102, wherein:
HLR1101 is used for the registered user and tackles the preceding rotating function CAMEL-Subscription-Information of audio call;
MSC/VLR1102 is used for obtaining the user from HLR1101 and tackles rotating function CAMEL-Subscription-Information before the audio call, obtains called subscriber's Redirection Information from called HLR; And according to CAMEL-Subscription-Information and the calling of Redirection Information control user's voice.
MSC1102 can be the MSC described in the foregoing description in the present embodiment.
The method, MSC and the system that change trap before the embodiment of the invention Calling Side prevention audio call, change sign on function before using HLR that the user class audio call is provided, and with HLR and MSC/VLR associating, this function in case the calling subscriber contracts, when dialing other number, if preceding commentaries on classics has taken place or preceding the commentaries on classics will have been taken place based on this called number, caller MSC/VLR finds to change interception before the signatory audio call of calling subscriber, then active termination is called out, do not continue, avoided changeing trap before the audio call, improved the fail safe of calling subscriber's audio call; Simultaneously, rotating function before HLR also provides interim unlatching or crosses the interception audio call makes things convenient for this professional application.The present invention is very little for core network element HLR and MSC/VLR transformation, is easy to realize, makes full use of conventional network resources, saves cost.
The above only is the preferred embodiments of the present invention; be not so limit claim of the present invention; every equivalent structure or flow process conversion that utilizes specification of the present invention and accompanying drawing content to be done; or directly or indirectly be used in other relevant technical field, all in like manner be included in the scope of patent protection of the present invention.

Claims (13)

1. the preceding method of changeing trap of Calling Side prevention audio call is characterized in that, comprising:
Calling mobile exchanging center MSC from caller attaching position register HLR obtain the interception audio call before the rotating function CAMEL-Subscription-Information;
Obtain called subscriber's Redirection Information from called HLR; Audio call according to described CAMEL-Subscription-Information and Redirection Information control calling subscriber.
2. method according to claim 1 is characterized in that, described CAMEL-Subscription-Information comprises: whether the calling subscriber authorizes is opened or closes the preceding rotating function of interception audio call and authorize ability information; Described mandate ability information comprise temporary unlatching or close, permanent unlatching or close, activate temporarily or deactivation interception audio call before rotating function.
3. method according to claim 2, it is characterized in that, the mode of rotating function CAMEL-Subscription-Information comprised before described caller MSC obtained the interception audio call from caller HLR: caller MSC/VLR initiates enroll in notifications or qualification application to caller HLR, and perhaps described caller HLR initiates the qualification instruction to caller MSC/VLR.
4. method according to claim 3 is characterized in that, describedly obtains called subscriber's Redirection Information from called HLR; Step according to described CAMEL-Subscription-Information and Redirection Information control calling subscriber's audio call comprises:
When the calling subscriber initiated audio call, described caller MSC initiated the position solicitation message to called HLR;
Receive the position application response message that carries preceding commentaries on classics indication and destination Mobile Station International ISDN Number that described called HLR is returned;
Change being designated as when changeing before called before described, from described CAMEL-Subscription-Information, obtain the calling subscriber and whether open rotating function before the interception audio call, if then end call discharges described destination Mobile Station International ISDN Number; Otherwise, continue to described destination Mobile Station International ISDN Number.
5. method according to claim 3 is characterized in that, describedly obtains called subscriber's Redirection Information from called HLR; Step according to described CAMEL-Subscription-Information and Redirection Information control calling subscriber's audio call comprises:
When the calling subscriber initiated audio call, described caller MSC initiated the position solicitation message to called HLR;
Receive the position application response message that carries routing information that described called HLR is returned;
Be set up to the speech path of called MS C according to described position application response message;
When called subscriber busy or no response and called subscriber activate the Call Forwarding ability, receive the changed course that carries that called MS C sends and exhale the changed course of reason to exhale solicitation message more again;
From described CAMEL-Subscription-Information, obtain the calling subscriber whether open the interception audio call before rotating function, if, then end call; Otherwise, send the transferred number solicitation message to called HLR, obtain corresponding transferred number.
6. method according to claim 3 is characterized in that, describedly obtains called subscriber's Redirection Information from called HLR; Step according to CAMEL-Subscription-Information and Redirection Information control calling subscriber's audio call comprises:
Rotating function transient state activates or during the deactivation Supplementary Service Code, caller MSC initiates to carry the supplementary service solicitation message of dialed digit to caller HLR before the calling subscriber provides the interception audio call;
Receive described caller HLR and carry the supplementary service application response message that changes extended field information before the interception audio call according to what described supplementary service solicitation message and CAMEL-Subscription-Information returned;
Make a call to the called subscriber according to described supplementary service application response message and by called HLR;
When before the called subscriber is taken place, changeing, from described supplementary service application response message, obtain the calling subscriber and whether open rotating function before the interception audio call; If, then end call; Otherwise, continue to transferred number or obtain transferred number.
7. the preceding MSC who changes trap of Calling Side prevention audio call is characterized in that, comprising:
The CAMEL-Subscription-Information acquisition module, be used for from caller HLR obtain the interception audio call before the rotating function CAMEL-Subscription-Information;
The preceding control module of changeing is used for obtaining called subscriber's Redirection Information from called HLR; Audio call according to described CAMEL-Subscription-Information and Redirection Information control calling subscriber.
8. MSC according to claim 7, it is characterized in that, the mode of rotating function CAMEL-Subscription-Information comprised before described caller MSC obtained the interception audio call from caller HLR: caller MSC/VLR initiates enroll in notifications or qualification application to caller HLR, and perhaps described caller HLR initiates the qualification instruction to caller MSC/VLR.
9. according to claim 7 or 8 described MSC, it is characterized in that the described preceding control module of changeing comprises:
First transmitting element is used for when the calling subscriber initiates audio call, initiates the position solicitation message to called HLR;
First receiving element is used to receive the position application response message that carries preceding commentaries on classics indication and destination Mobile Station International ISDN Number that described called HLR is returned;
First acquiring unit is used for changeing before described being designated as when changeing before called, obtains the calling subscriber and whether open rotating function before the interception audio call from described CAMEL-Subscription-Information;
Change control unit before first, be used for changeing before described being designated as and change before called and calling subscriber when opening the preceding rotating function of interception audio call, end call discharges described destination Mobile Station International ISDN Number; Otherwise, continue to described destination Mobile Station International ISDN Number.
10. according to claim 7 or 8 described MSC, it is characterized in that the described preceding control module of changeing comprises:
Second transmitting element is used for when the calling subscriber initiates audio call, initiates the position solicitation message to called HLR;
Second receiving element is used to receive the position application response message that carries routing information that described called HLR is returned; And, receive the changed course that carries that called MS C sends and exhale the changed course of reason to exhale solicitation message more again when after the speech path of setting up with called MS C, when called subscriber busy or no response and called subscriber activate the Call Forwarding ability;
The first call setup unit is used for applying for that according to described position response message is set up to the speech path of called MS C;
Second acquisition unit, be used for from described CAMEL-Subscription-Information obtain the calling subscriber whether open the interception audio call before rotating function;
Change control unit before second, be used for when the calling subscriber opens the preceding rotating function of interception audio call end call; Otherwise, send the transferred number solicitation message to called HLR, obtain corresponding transferred number.
11., it is characterized in that the described preceding control module of changeing comprises according to claim 7 or 8 described MSC:
The 3rd transmitting element is used for initiating to carry the supplementary service solicitation message of dialed digit to caller HLR when the calling subscriber provides the preceding rotating function transient state of interception audio call to activate or deactivates Supplementary Service Code;
The 3rd receiving element is used to receive described caller HLR and carries the supplementary service application response message that changes extended field information before the interception audio call according to what described supplementary service solicitation message and CAMEL-Subscription-Information returned;
The second call setup unit is used for making a call to the called subscriber according to described supplementary service response message and by called HLR;
The 3rd acquiring unit when being used for changeing before the called subscriber is taken place, obtaining the calling subscriber and whether opens rotating function before the interception audio call from described supplementary service application response message;
Change control unit before the 3rd, be used for when the calling subscriber opens the preceding rotating function of interception audio call end call; Otherwise, continue to transferred number or obtain transferred number.
12. the preceding system that changes trap of Calling Side prevention audio call is characterized in that, comprising: HLR and MSC/VLR, wherein:
Described HLR is used for the registered user and tackles the preceding rotating function CAMEL-Subscription-Information of audio call;
Described MSC/VLR is used for obtaining the user from described HLR and tackles rotating function CAMEL-Subscription-Information before the audio call, obtains called subscriber's Redirection Information from called HLR; And control described user's voice according to described CAMEL-Subscription-Information and Redirection Information and call out.
13. system according to claim 12 is characterized in that, described MSC comprises:
The CAMEL-Subscription-Information acquisition module is used for changeing CAMEL-Subscription-Information before caller HLR obtains the interception voice call function;
The preceding control module of changeing is used for obtaining called subscriber's Redirection Information from called HLR; Audio call according to described CAMEL-Subscription-Information and Redirection Information control calling subscriber.
CN201110044778.9A 2011-02-24 2011-02-24 Method, mobile switching centre (MSC) and system for preventing voice calling forward trap at calling side Expired - Fee Related CN102111738B (en)

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