CN100493217C - Call forwarding method and system - Google Patents
Call forwarding method and system Download PDFInfo
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- CN100493217C CN100493217C CNB2007101043767A CN200710104376A CN100493217C CN 100493217 C CN100493217 C CN 100493217C CN B2007101043767 A CNB2007101043767 A CN B2007101043767A CN 200710104376 A CN200710104376 A CN 200710104376A CN 100493217 C CN100493217 C CN 100493217C
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Abstract
The invention is used for saving network resources when a call-forward is made. In the invention, when receiving a calling from calling side, the MSC requests the subscription information of called side to the HLR; after receiving a first confirmation message not comprising the subscription information used for triggering the intelligent service from HLR, according to the first confirmation message, the MSC requests to get the route information of the called side, and receives the second confirmation message comprising the route information of the called side from the HLR, according to the route information, the MSC makes the call connection to the destination number. The invention can avoid the unnecessary signaling interaction between the MSC and the control device when the called party at network side is free charge. The subscription information of the intelligent service comprises: Initial Termination, Called_Routing_Address Available etc.
Description
Technical field
The present invention relates to the communications field, particularly call forwarding method and system.
Background technology
Mobile intelligent net is to introduce the intelligent network functional entity in the mobile network, to finish a kind of network to the Based Intelligent Control of mobile calls.It is existing mobile network and the combining of intelligent network.Can be with (the Mobile Switching Center of mobile switching centre, abbreviation " MSC ") transform Service Switching Point (ServiceSwitch Point as, be called for short " SSP "), make the mobile network and high-rise intelligent network of bottom, as Service Control Point of intelligent network (Service Control Point, abbreviation " SCP "), service creation environment (ServiceCreation Environment, be called for short " SCE ") wait continuous, thereby will move exchange and professional realization, the formation mobile intelligent net of separating.
Mobile intelligent net can provide many business, below mainly wherein Call Forwarding services are described.Call Forwarding comprises that Forwarded-to Voice Mailbox and Call Forwarding to another number, forward another number before said Call Forwarding mainly refers to here.According to the condition of Call Forwarding, Call Forwarding can also be divided into unconditioned call connection, no-answer call connection and call forwarding on busy, respectively this process of changeing before in three is described below.
Based on attaching position register (Home Location Register, abbreviation " HLR ") Call Forwarding Unconditional process as shown in Figure 1, (the Mobile Directory Number that comprises terminal called in this calling when MSCa receives the call of calling terminal, claim movable address numeral (Mobile Directory Number again, be called for short " MDN ")), shown in step 101, MSCa triggers the Mobile_Termination trigger, send LOCREQ message to the HLRb under the terminal called, comprise the TRIGTYPE parameter in this LOCREQ message, this parameter is used to indicate the current Mobile_Termination trigger that triggered of MSCa.
Shown in step 102, HLRb determines that terminal called has activated IN service, send locreq return results message to MSCa, be provided with the TRIGADDRLIST parameter in this message, this parameter is used to indicate the trigger (comprising Initial_Termination trigger, Location trigger, Calling_Routing_Address_Available trigger) of needs setting.
MSCa enters step 103 when triggering the Initial_Termination trigger, MSCa sends the SCPa of ANLYZD message to appointment in the TRIGADDRLIST parameter.The TRIGTYPE parameter that is provided with in this ANLYZD message indicates and has triggered the Initial_Termination trigger.
Then enter step 104, after SCPa carries out specific processing, after the prepayment service activation of SCPa judgement terminal called and remaining sum being arranged, send anlyzd return results message to MSCa.
When MSCa obtains the routing iinformation of terminal called at needs, enter step 105, trigger the Location trigger, send LOCREQ message, the routing iinformation of request terminal called to HLRb.The TRIGTYPE parameter that is provided with in this LOCREQ message indicates and has triggered the Location trigger.
Then enter step 106, after HLRb receives this LOCREQ message, determine current Call Forwarding Unconditional (CFU) business that activated of terminal called, then in the locreq response message, indicate the number of Call Forwarding to appointment.Comprise parameter TRIGADDRLIST in this locreq response message, be used for being provided for the trigger (as: Calling_Routing_Address_Available, O_Answer, O_Disconnect) of Call Forwarding, the trigger that will be provided with before these triggers will replace.
Then enter step 107, the routing iinformation of the number that MSCa forwards to before analyzing, and be prepared as call routing, after route is determined, MSCa triggers the Calling_Routing_Address_Available trigger, send ANLYZD message to the SCPa relevant, notified this SCPa terminal called calling transfer with this trigger.
Then enter step 108, SCPa returns the anlyzd response message to MSCa.
In step 109, change current the calling before the MSCa.
When called party answer, as step 110, MSCa detects the O_Answer trigger, sends OANSWER message to SCPa, and notice SCPa conversation beginning can begin to charge.
When the calling terminal on-hook, as step 111, MSCa triggers the O_Disconnect trigger, sends ODISCONNECT message to SCPa, notice SCPa end of conversation, and charging stops.
As step 112, SCPa returns empty odisconnect response message and gives MSCa, and MSCa receives call release after this message.
Call Forwarding No Reply and Call Forwarding Unconditional are similar, and its difference is, in the Call Forwarding Unconditional flow process, HLRb can be when the MSCa request route information, directly notify the number that forwards appointment before this MSCa to, and the trigger that changes before being used in for its branch; And in the Call Forwarding No Reply flow process, it is that this terminal called distributes roaming number by the MSCb of this terminal called that HLRb needs elder generation, MSCa determines route according to this roaming number again, when preparing this calling of terminating, also can trigger the Called_Routing_Address_Available trigger, MSCa sends ANLYZD message to SCPa, notifies the roaming number of this SCPa terminal called, so that SCPa can carry out corresponding charging according to this roaming number.After the terminal called jingle bell was overtime, MSCa carried out unresponsive Call Forwarding to HLRb request, and HLRb this moment is the number of commentaries on classics and be used for the trigger of Call Forwarding to it returns before.
It is also similar with unconditioned call connection to call forwarding on busy, and its difference mainly also is number that changes before HLRb returns and the opportunity that is used for the trigger of Call Forwarding.In the flow process of calling forwarding on busy, HLRb can determine the current busy condition that is in of this terminal called by the MSCb of this terminal called, and can not use Call Waiting after the message of receiving MSCa request route, number that this moment, HLRb changeed before MSCa returns and the trigger that is used for Call Forwarding.
The present inventor states in realization in the process of flow process and finds, no matter the preceding commentaries on classics of what type takes place, MSCa need trigger called flow on intelligent network, comprise and trigger the Initial_Termination trigger, MSCa notice SCPa is checked the information such as pre-payment of terminal called and judge.In the Call Forwarding No Reply flow process, also need to trigger the Called_Routing_Address_Available trigger, make the roaming number of MSCa notice SCPa terminal called, so that SCPa can carry out corresponding charging according to this roaming number.Yet, in the comparatively fierce country of some Telecom Competition, operator is in order to attract more user-network access, often take called free tariff policy, under called free situation, trigger on the intelligent network there is no need, only can cause a large amount of wastes of Internet resources, strengthened the cost of investment of operator with the relevant called flow that charges.
Summary of the invention
Embodiment of the present invention provides a kind of call forwarding method and system, does not carry out billing operation to called for free user's calling, and according to preceding commentaries on classics condition with call proceeding to preceding commentaries on classics destination Mobile Station International ISDN Number, conserve network resources takies in Call Forwarding services.
Embodiments of the present invention provide a kind of call forwarding method, may further comprise the steps:
After the calling of receiving caller, to the called CAMEL-Subscription-Information of HLR request;
Reception does not comprise the CAMEL-Subscription-Information of trigger intelligent business from first response message of HLR in first response message;
According to this first response message, to the called routing iinformation of HLR acquisition request;
Reception is from second response message of HLR, and second response message comprises called routing iinformation, according to this routing iinformation destination Mobile Station International ISDN Number is arrived in call proceeding.
Embodiments of the present invention also provide a kind of switching equipment, comprising:
The CAMEL-Subscription-Information request unit is used for after the calling of receiving caller, to the called CAMEL-Subscription-Information of HLR request;
First receiving element is used to receive first response message from HLR, does not comprise the CAMEL-Subscription-Information of trigger intelligent business in first response message;
The route requests unit is used for first response message received according to receiving element, to the called routing iinformation of HLR acquisition request;
Second receiving element is used to receive second response message from HLR;
The preceding unit that changes is used for when second response message that receiving element is received comprises the routing iinformation of terminal called, according to routing iinformation destination Mobile Station International ISDN Number is arrived in call proceeding.
Embodiments of the present invention also provide a kind of attaching position register, comprising:
The 3rd receiving element is used for receiving the message of asking called CAMEL-Subscription-Information from the equipment of receiving calling;
First response unit is used for returning first response message to equipment after the message of the called CAMEL-Subscription-Information of first receiving element request of receiving, does not comprise the CAMEL-Subscription-Information of trigger intelligent business in first response message;
The 4th receiving element is used for the message that slave unit receives the called routing iinformation of acquisition request;
Second response unit is used for returning second response message to equipment, comprises called routing iinformation in this second response message.
Because in embodiment of the present invention, if network side is called free, then HLR is when the called CAMEL-Subscription-Information of switching equipment such as MSC request, do not return the CAMEL-Subscription-Information of trigger intelligent business, guarantee that this switching equipment can not trigger control appliance such as SCP and carry out called charging associative operation, directly when satisfying the Call Forwarding condition, with call proceeding to destination Mobile Station International ISDN Number (being transferred number), thereby avoided unnecessary signaling interaction between this switching equipment and the control appliance, and avoid control appliance to carry out unnecessary called charging inspection, saved Internet resources.
Description of drawings
Fig. 1 is based on the flow chart of the unconditioned call connection of HLR in the prior art;
Fig. 2 is the Call Forwarding principle schematic according to embodiment of the present invention;
Fig. 3 is the unconditioned call connection method flow diagram based on HLR according to first embodiment of the invention;
Fig. 4 is the no-answer call connection method flow diagram based on HLR according to second embodiment of the invention;
Fig. 5 is the busy calling forwarding method flow chart based on HLR according to third embodiment of the invention;
Fig. 6 is the Call Forwarding system construction drawing according to four embodiment of the invention.
Embodiment
For the technical scheme and the advantage that make embodiment of the present invention is clearer, embodiments of the present invention are described in further detail below in conjunction with accompanying drawing.
As shown in Figure 2, in embodiments of the present invention, receive under its linchpin at MSCa shown in step 210, to send the HLRb of message after the calling of caller, ask this called CAMEL-Subscription-Information to HLRb to called ownership.
Shown in step 220, HLRb returns first response message to MSCa.Because current is called free, therefore do not comprise among the HLRb trigger intelligent business that this is called CAMEL-Subscription-Information, thereby HLRb only is provided with the Location parameter in returning to first response message of MSCa, and do not comprise the CAMEL-Subscription-Information of trigger intelligent business, as Initial_Termination parameter (initial terminal parameter) and Called_Routing_Address_Available parameter (called route can reach parameter).Thereby avoided unnecessary signaling interaction between MSCa and the control appliance SCP, and avoided SCP to carry out unnecessary called charging inspection, saved Internet resources.
Shown in step 230, MSCa when needs are determined called route, sends the message of this called routing iinformation of acquisition request according to this Location parameter to this HLRb.
Shown in step 240, after HLRb receives this message, when satisfying this called Call Forwarding condition, return second response message to this MSCa, in this second response message, comprise called routing iinformation (as transferred number) and forward-transfer charging parameter.This forward-transfer charging parameter is used for indication notice SCP and carries out the forward-transfer charging associative operation, comprises Calling_Routing_Address_Available parameter (being that the caller route can reach parameter), O_Answer parameter (promptly answering parameter), O_Disconnect parameter (promptly disconnecting parameter).
Shown in step 250, MSCa is according to the called routing iinformation that comprises in this second response message, this call proceeding to this destination Mobile Station International ISDN Number (being transferred number), and is carried out the forward-transfer charging associative operation according to the forward-transfer charging parameter that comprises in this second response message notice SCP.
Respectively unconditioned call connection, no-answer call connection and the three kinds of situations of calling forwarding on busy are specifically described below.In following each execution mode, with the Location parameter, the Initial_Termination parameter, the Called_Routing_Address_Available parameter, the Calling_Routing_Address_Available parameter, the O_Answer parameter, the O_Disconnect parameter is called the Location trigger, the Initial_Termination trigger, the Called_Routing_Address_Available trigger, the Calling_Routing_Address_Available trigger, the O_Answer trigger, the O_Disconnect trigger, though it is slightly different on expressing, but its implication is identical with effect, and said here trigger is not an equipment physically.
First embodiment of the invention relates to a kind of method of the unconditioned call connection based on HLR, as shown in Figure 3.
(this calling comprises called mobile number when MSCa receives the calling of calling terminal under its linchpin, or be called MDN), shown in step 301, MSCa triggers the Mobile_Termination trigger, send LOCREQ message to the HLRb under first terminal called of this calling terminal calling, to the called CAMEL-Subscription-Information of its request.Comprise the TRIGTYPE parameter in this LOCREQ message, this parameter is used to indicate the current Mobile_Termination trigger that triggered of MSCa.
Shown in step 302, HLRb determines that this first terminal called has activated IN service, and the tariff policy of current network side setting is called free (this first terminal called need not signatory called party information in this case), therefore send locreq return results message to MSCa, in the TRIGADDRLIST of this message parameter, only be provided with the Location trigger, and do not comprise the CAMEL-Subscription-Information of trigger intelligent business, promptly be not provided for triggering control appliance SCP this first terminal called is carried out the first kind trigger of called charging associative operation, comprise Initial_Termination trigger and Called_Routing_Address_Available trigger.Thereby called when free, MSCa can be because of triggering the Initial_Termination trigger, and transmission ANLYZD message is to the SCPa of appointment, SCPa can be to this first terminal called coherence check that charges yet, as remain the verification of pre-payment, saved the transfer resource between MSCa and the SCPa, and the corresponding operating resource of SCPa.
When MSCa obtains the routing iinformation of first terminal called at needs, shown in step 303, trigger the Location trigger, send LOCREQ message, the routing iinformation of request terminal called to HLRb.The TRIGTYPE parameter that is provided with in this LOCREQ message indicates and has triggered the Location trigger.
Shown in step 304, after HLRb receives this LOCREQ message, if determine current Call Forwarding Unconditional (CFU) business that activated of first terminal called, then in the locreq response message that returns to MSCa, comprise called routing iinformation, promptly indicate the number of Call Forwarding to appointment.Comprise parameter TRIGADDRLIST in this locreq response message, be used for being provided for triggering SCP carries out the forward-transfer charging associative operation to this first terminal called trigger (i.e. the second class trigger), comprise Calling_Routing_Address_Available, O_Answer and O_Disconnect, if before this step, this MSCa has been provided with above-mentioned trigger in other flow process, the trigger that will be provided with before then these triggers of being provided with in this step of HLRb will replace.
Wherein, Calling_Routing_Address_Available is used for after the route of the calling after the preceding commentaries on classics is determined, and triggers MSCa notice SCPa first terminal called and carries out Call Forwarding; The O_Answer trigger triggers MSCa notice SCPa when being used for calling after preceding commentaries on classics and being switched on and calls out beginning; When the O_Disconnect trigger is used for end of calling after preceding commentaries on classics, trigger MSCa notice SCPa end of calling.
Shown in step 305, the routing iinformation of the number that MSCa forwards to before analyzing, and be prepared as call routing, after route is determined, MSCa triggers Calling_Routing_Address_Available, send ANLYZD message to the SCPa relevant, notified this SCPa first terminal called calling transfer with this trigger.
Shown in step 306, SCPa returns the anlyzd response message to MSCa.
Shown in step 307, MSCa arrives this transferred number with current call proceeding.
When second terminal called after Call Forwarding was replied, shown in step 308, MSCa triggered the O_Answer trigger, sent OANSWER message to SCPa, and notice SCPa conversation beginning can begin to charge.
When the calling terminal on-hook, shown in step 309, MSCa triggers the O_Disconnect trigger, sends ODISCONNECT message to SCPa, notice SCPa end of conversation, and charging stops.
Shown in step 310, SCPa returns empty odisconnect response message and gives MSCa, and MSCa receives call release after this message.
By above-mentioned flow process as can be seen, in the present embodiment, under called free situation, when HLRb asks called CAMEL-Subscription-Information at MSCa, only return the Location trigger, and do not return the CAMEL-Subscription-Information of trigger intelligent business, promptly do not return and be used to trigger MSCa notice control appliance SCPa carries out called charging associative operation to this first terminal called Initial_Termination trigger and Called_Routing_Address_Available trigger.Thereby MSCa can be because of being triggered to the Initial_Termination trigger, and transmission ANLYZD message is to the SCPa of appointment, SCPa can be to this first terminal called coherence check that charges yet, as remain the verification of pre-payment, saved the transfer resource between MSCa and the SCPa, and the corresponding operating resource of SCPa.And when economizing on resources, can finish this unconditioned call connection flow process equally, can not influence the business demand of terminal.
Second embodiment of the invention relates to a kind of method of the no-answer call connection based on HLR, as shown in Figure 4.
Step 401 is identical respectively to step 303 with step 301 to step 403, HLRb equally only is provided with the Location trigger, and is not provided for triggering MSCa notice control appliance SCPa carries out called charging associative operation to this first terminal called Initial_Termination trigger and Called_Routing_Address_Available trigger.Thereby MSCa can be because of being triggered to the Initial_Termination trigger, and transmission ANLYZD message is to the SCPa of appointment, SCPa can be to this first terminal called coherence check that charges, as remain the verification of pre-payment, saved the transfer resource between M SCa and the SCPa, and the corresponding operating resource of SCPa.
Shown in step 404, after HLRb receives LOCREQ message from MSCa, determine that call treatment should continue (Call Forwarding No Reply needs earlier first terminal called to be called out), send ROUTREQ message to the service MSCb under first terminal called, ask to distribute roaming number into this first terminal called.
Shown in step 405, service MSCb is that this first terminal called distributes roaming number TLDN, and by routreq message the roaming number that distributes is returned to HLRb.HLRb sends locreq message and indicates the calling that is established to first terminal called to MSCa.Because HLRb is not provided with the Called_Routing_Address_Available trigger, therefore in this step, after MSCa determines the first terminal called route, can not trigger the Called_Routing_Address_Available trigger, notify the roaming number of this first terminal called of SCPa (because called free, therefore SCPa need not to carry out corresponding charging according to the roaming number of first terminal called), thus network transmission resource further saved.
Shown in step 406, first terminal called begins ring, if the MSCb under first terminal called detects replying timer expiry and having the place ahead office to exist of this terminal, change request message REDREQ before then the MSCa of MSCb under calling terminal sends, in this message, comprise parameters R EDREASON, be used to indicate Call Forwarding No Reply taken place.MSCa returns response message redreq, call release to MSCb.
Need to prove, MSCa is after receiving the preceding commentaries on classics request message of MSCb in this step, can temporarily not return response message yet, MSCa can after send response message to MSCb when changing into merit before confirming, MSCa can change failed message before service MSCb returns if the preceding commentaries on classics of this time is unsuccessful, initiates the preceding request of changeing once more by serving MSCb.Corresponding to the situation of request again after the preceding commentaries on classics failure, trigger Calling_Routing_Address_Available, the O_Answer and the O_Disconnect that are provided with when changeing before once before needing service MSCb/SSP to handle.
Shown in step 407, MSCa sends number request message TRANUMREQ to HLRb.After HLRb receives this message, if determining the Call Forwarding No Reply CFNA of this first terminal called activates, then return the tranumreq response message to MSCa, in this response message, comprise TERMILIST parameter and TRIGADDRLIST parameter, in this TERMILIST parameter, indicate the number of Call Forwarding to appointment; This TRIGADDRLIST parameter is used for being provided for triggering SCP carries out the forward-transfer charging associative operation to this first terminal called trigger (i.e. the second class trigger), comprise Calling_Routing_Address_Available trigger, O_Answer trigger, O_Disconnect trigger, if before this step, this MSCa has been provided with above-mentioned trigger in other flow process, the trigger that will be provided with before then these triggers of being provided with in this step of HLRb will replace.
Wherein, the Calling_Routing_Address_Available trigger is used for after the route of the calling after the preceding commentaries on classics is determined, and triggers MSCa notice SCPa first terminal called and carries out Call Forwarding; The O_Answer trigger triggers MSCa notice SCPa when being used for calling after preceding commentaries on classics and being switched on and calls out beginning; When the O_Disconnect trigger is used for end of calling after preceding commentaries on classics, trigger MSCa notice SCPa end of calling.
Step 408 is identical to step 310 with step 305 to step 413, does not repeat them here.
By above-mentioned flow process as can be seen, in the present embodiment, under called free situation, when HLRb asks called CAMEL-Subscription-Information at MSCa, only return the Location trigger, and do not return the CAMEL-Subscription-Information of trigger intelligent business, promptly do not return and be used to trigger MSCa notice control appliance SCPa carries out called charging associative operation to this first terminal called Initial_Termination trigger and Called_Routing_Address_Available trigger.Thereby MSCa can be because of being triggered to the Initial_Termination trigger, and transmission ANLYZD message is to the SCPa of appointment, SCPa can be to this first terminal called coherence check that charges yet, as remain the verification of pre-payment, saved the transfer resource between MSCa and the SCPa, and the corresponding operating resource of SCPa.After MSCa determines the route of first terminal called, can not trigger the Called_Routing_Address_Available trigger equally, notify the roaming number of this first terminal called of SCPa (because called free, therefore SCPa need not to carry out corresponding charging according to the roaming number of first terminal called), thus network transmission resource further saved.Present embodiment can be finished the no-answer call connection flow process equally in conserve network resources, can not influence the business demand of terminal.
Third embodiment of the invention relates to a kind of method of calling forwarding on busy based on HLR, as shown in Figure 5.
Step 501 is identical to step 303 with step 301 to step 503, does not repeat them here.
Shown in step 504, HLRb sends out route request information ROUTREQ to the service MSCb of first terminal called after receiving LOCREQ message from MSCa.MSCb receives this first terminal called of paging behind this request message, if determine that this first terminal called is in busy condition, and Call Waiting is unavailable, and then MSCb returns response message routreq to HLRb, and it is busy to comprise that in this response message parameter A CCDEN indicates the user.
Shown in step 505, HLRb returns the locreq response message to MSCa.If HLRb determines that this first terminal called is current and has activated the CFB supplementary service of calling forwarding on busy, then in this locreq response message, indicate the number of Call Forwarding to appointment, and in this response message, comprise the TRIGADDRLIST parameter, be used for being provided for triggering SCP this first terminal called is carried out the trigger (i.e. the second class trigger) of forward-transfer charging associative operation, comprise Calling_Routing_Address_Available trigger, O_Answer trigger, O_Disconncct trigger.If before this step, this MSCa has been provided with above-mentioned trigger in other flow process, the trigger that will be provided with before then these triggers of being provided with in this step of HLRb will replace.
Step 506 is identical to step 310 with step 305 to step 511, does not repeat them here.
By above-mentioned flow process as can be seen, in the present embodiment, under called free situation, when HLRb asks called CAMEL-Subscription-Information at MSCa, only return the Location trigger, and do not return the CAMEL-Subscription-Information of trigger intelligent business, promptly do not return and be used to trigger MSCa notice control appliance SCPa carries out called charging associative operation to this first terminal called Initial_Termination trigger and Called_Routing_Address_Available trigger.Thereby MSCa can be because of being triggered to the Initial_Termination trigger, and transmission ANLYZD message is to the SCPa of appointment, SCPa can be to this first terminal called coherence check that charges yet, as remain the verification of pre-payment, saved the transfer resource between MSCa and the SCPa, and the corresponding operating resource of SCPa.And when economizing on resources, can finish this flow process of calling forwarding on busy equally, can not influence the business demand of terminal.
Four embodiment of the invention relates to a kind of Call Forwarding system, as shown in Figure 6, comprises MSC and HLR.This MSC comprises: CAMEL-Subscription-Information request unit, first receiving element, route requests unit, second receiving element and preceding commentaries on classics unit; This HLR comprises: the 3rd receiving element, the 4th receiving element, judging unit and first response unit, second response unit.
Wherein, the CAMEL-Subscription-Information request unit of MSC is used for after the calling of receiving caller, to the called CAMEL-Subscription-Information of HLR request; The 3rd receiving element of HLR is used to receive the request message of the Terminating CAMEL Subscription Information that MSC sends; First response unit of HLR is used for returning first response message according to the request message of this Terminating CAMEL Subscription Information to this MSC, does not comprise the CAMEL-Subscription-Information of trigger intelligent business in this first response message; First receiving element of MSC is used to receive first response message from this HLR; The route requests unit of MSC is used for according to this first response message, to the called routing iinformation of HLR acquisition request; The 4th receiving element of HLR is used to receive the request message that obtains called routing iinformation that MSC sends; The judging unit of HLR is used to judge the called Call Forwarding condition that whether satisfies; Second response unit of HLR is used for judging at this judging unit called when satisfying the Call Forwarding condition, returns second response message to MSC, and this second response message comprises called routing iinformation; Second receiving element of MSC is used to receive second response message from this HLR; The preceding commentaries on classics unit of MSC is used for according to the routing iinformation of this second response message destination Mobile Station International ISDN Number being arrived in this call proceeding.
Because under called free situation, when HLR asks called CAMEL-Subscription-Information at MSC, do not return the CAMEL-Subscription-Information of trigger intelligent business, thereby can not trigger MSC notice control appliance such as SCP and carry out called charging associative operation called, can be when carrying out the Call Forwarding flow process, avoid MSC and the control appliance of the associative operation that charges between unnecessary signaling interaction, and avoid control appliance to carry out unnecessary charging inspection, saved Internet resources.
Need to prove that it is one of following that the CAMEL-Subscription-Information of above-mentioned IN service comprises at least: initial terminal parameter (Initial_Termination), called route can reach parameter (Called_Routing_Address_Available).
It is one of following that the Call Forwarding condition that this HLR judges comprises at least: called unconditioned call connection; Or, Call Forwarding during called no response; Or, change before the called chance busy hour call, use very extensive.
Also comprise the forward-transfer charging parameter in second response message that this second receiving element is received, this forward-transfer charging parameter is used for indication notice SCP and carries out the forward-transfer charging associative operation; It is one of following that this forward-transfer charging parameter comprises at least: the caller route can reach parameter (being the Calling_Routing_Address_Available trigger), answers parameter (being the O_Answer trigger), disconnect parameter (being the O_Disconnect trigger).
This MSC also comprises: trigger element is used for caller route according to this second response message and can reaches parameter calling is triggered to control appliance SCP; Conversation beginning notification unit be used for according to the parameter of answering of second response message destination number being arrived in call proceeding, and notice SCP charges when call through; Conversation expiry notification unit is used for stopping to charge according to the disconnection parameter notice SCP of second response message.By above-mentioned three unit, guarantee that SCP after this Call Forwarding, can correctly charge.
In sum, in embodiments of the present invention, in the process of Call Forwarding, for the called free situation of network side, when HLR asks called CAMEL-Subscription-Information at MSC, do not return the CAMEL-Subscription-Information of trigger intelligent business, thereby can not carry out the Signalling exchange relevant between the control appliance SCP of MSC and the associative operation that charges, avoid unnecessarily taking internetwork transfer resource with called charging to it.Simultaneously, do not carry out the Signalling exchange relevant between MSC and the SCP, make SCP can not carry out unnecessary called charging checked operation, reduced the burden of SCP with called charging.
Wherein, the CAMEL-Subscription-Information of above-mentioned non-return trigger intelligent business comprises Initial_Termination and Called_Routing_Address_Available.Whether MSC does not receive Initial_Termination, then can not notify SCP to the called detecting operation that charges, as detect and calledly have enough funds to carry out this calling.Because the charging detecting operation is insignificant under called free situation, cancel this operation and can avoid SCP to carry out unnecessary operation, reduce the burden of SCP.Equally, because SCP does not need to charge to called, therefore need not to know that called roaming number, HLR do not return Called_Routing_Address_Available and make that MSC can this operation of exercise notice SCP called roaming number, saved the transfer resource between the network equipment.Aforesaid operations for single call before then the speech, the cost of its saving is small, but for whole network, has then saved limited transfer resource significantly, and has reduced the burden of SCP.
In addition, the range of application of embodiments of the present invention is wider, can be suitable for and existing turn of tidal stream journeys before all, and as called unconditioned call connection, called no-answer call connection, called call forwarding on busy etc., practical value is higher.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (10)
1. a call forwarding method is characterized in that, comprises step:
After the calling of receiving caller, to the called CAMEL-Subscription-Information of attaching position register HLR request;
Reception does not comprise the CAMEL-Subscription-Information of trigger intelligent business from first response message of described HLR in described first response message;
According to described first response message, to the described called routing iinformation of described HLR acquisition request;
Reception is from second response message of described HLR, and described second response message comprises described called routing iinformation, according to described routing iinformation destination Mobile Station International ISDN Number is arrived in described call proceeding.
2. call forwarding method according to claim 1 is characterized in that, receives before second response message from described HLR, also comprises: described HLR determines the described called Call Forwarding condition that satisfies.
3. call forwarding method according to claim 2 is characterized in that, it is one of following that described Call Forwarding condition comprises at least:
Called unconditioned call connection; Or, Call Forwarding during called no response; Or, change before the called chance busy hour call.
4. call forwarding method according to claim 1 is characterized in that, also comprises the forward-transfer charging parameter in described second response message, and this forward-transfer charging parameter is used for indication notice control appliance and carries out the forward-transfer charging associative operation.
5. call forwarding method according to claim 4 is characterized in that, it is one of following that described forward-transfer charging parameter comprises at least: the caller route can reach parameter, answers parameter, disconnect parameter;
Behind second response message of receiving from described HLR, further comprising the steps of:
Can reach parameter according to described caller route, described calling is triggered to described control appliance;
According to the described parameter of answering, after described destination Mobile Station International ISDN Number is arrived in described call proceeding, when this calling is switched on, notify described control appliance to begin to charge;
According to described disconnection parameter, when described end of calling, notify described control appliance to stop to charge.
6. a switching equipment is characterized in that, comprising:
The CAMEL-Subscription-Information request unit is used for after the calling of receiving caller, to the called CAMEL-Subscription-Information of HLR request;
First receiving element is used to receive first response message that described HLR returns according to the CAMEL-Subscription-Information request of CAMEL-Subscription-Information request unit transmission, does not comprise the CAMEL-Subscription-Information of trigger intelligent business in described first response message;
The route requests unit is used for according to described first response message, to the described called routing iinformation of described HLR acquisition request;
Second receiving element is used to receive second response message that described HLR returns according to the routing iinformation request of route requests unit transmission;
The preceding unit that changes is used for according to the routing iinformation of described second response message destination Mobile Station International ISDN Number being arrived in described call proceeding.
7. switching equipment according to claim 6 is characterized in that, also comprises:
Trigger element is used for caller route according to described second response message and can reaches parameter described calling is triggered to control appliance;
Conversation beginning notification unit is used for according to the parameter of answering of described second response message described destination Mobile Station International ISDN Number being arrived in described call proceeding, and notifies described control appliance to charge when described call through;
Conversation expiry notification unit is used for notifying described control appliance to stop to charge according to the disconnection parameter of described second response message.
8. an attaching position register is characterized in that, comprising:
The 3rd receiving element is used to receive the request message of the Terminating CAMEL Subscription Information that switching equipment sends;
First response unit is used for returning first response message according to the request message of described Terminating CAMEL Subscription Information to described switching equipment, does not comprise the CAMEL-Subscription-Information of trigger intelligent business in described first response message;
The 4th receiving element is used to receive the request message that obtains called routing iinformation that switching equipment sends;
Second response unit is used for returning second response message to described switching equipment, and described second response message comprises called routing iinformation.
9. attaching position register according to claim 8, it is characterized in that, also comprise: judging unit is used to judge the described called Call Forwarding condition that whether satisfies, when satisfying the Call Forwarding condition, indicate described second response unit to return called routing iinformation called to described switching equipment.
10. attaching position register according to claim 9 is characterized in that, it is one of following that described Call Forwarding condition comprises at least: called unconditioned call connection; Or, Call Forwarding during called no response; Or, change before the called chance busy hour call.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101043767A CN100493217C (en) | 2007-05-10 | 2007-05-10 | Call forwarding method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101043767A CN100493217C (en) | 2007-05-10 | 2007-05-10 | Call forwarding method and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101052163A CN101052163A (en) | 2007-10-10 |
| CN100493217C true CN100493217C (en) | 2009-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2007101043767A Expired - Fee Related CN100493217C (en) | 2007-05-10 | 2007-05-10 | Call forwarding method and system |
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| Country | Link |
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| CN (1) | CN100493217C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101431738B (en) * | 2007-11-06 | 2012-04-25 | 华为技术有限公司 | Method, system and apparatus for implementing conditional call forwarding |
| CN101883344B (en) * | 2009-05-06 | 2013-09-25 | 华为技术有限公司 | Associated call splicing method among networks and business agent system |
| CN101742004B (en) * | 2009-12-23 | 2013-01-16 | 中兴通讯股份有限公司 | Call transfer method and device in multi-call central system |
| CN103051814B (en) * | 2011-10-11 | 2016-04-27 | 中国移动通信集团江苏有限公司 | Realize the mthods, systems and devices of call forwarding |
| CN108076005A (en) * | 2016-11-09 | 2018-05-25 | 中兴通讯股份有限公司 | A kind of call forwarding method and device |
| EP4233380A1 (en) * | 2020-10-22 | 2023-08-30 | Telefonaktiebolaget LM Ericsson (publ) | Methods, entities, and computer readable media for routing path discovery |
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2007
- 2007-05-10 CN CNB2007101043767A patent/CN100493217C/en not_active Expired - Fee Related
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| 移动智能网中的呼叫前转. 王祥勃.广东通信技术. 2006 |
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| CN101052163A (en) | 2007-10-10 |
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