CN101166300B - Service switching method and system - Google Patents
Service switching method and system Download PDFInfo
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- CN101166300B CN101166300B CN200610149955A CN200610149955A CN101166300B CN 101166300 B CN101166300 B CN 101166300B CN 200610149955 A CN200610149955 A CN 200610149955A CN 200610149955 A CN200610149955 A CN 200610149955A CN 101166300 B CN101166300 B CN 101166300B
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Abstract
The method for switching services includes steps: step S102, in procedure of voice call, when receiving signal tone for switching services from equipment at called user, the mobile station at the called party carries out service negotiation and hard switching through the base station controller at the called party to establish connection to network intercommunication function unit (NIFU) at the called party; step S106, through receiving in-band message, the base station controller at calling party starts switching services, establishes connection between the calling party and NIFU at the calling party so as to complete switching services. The invention also discloses the system for switching services. The invention also discloses another method and system for switching services. Without changing habit user uses, the invention implements function for switching IWF services between voice service and facsimile service so as to be convenient for user to do operations.
Description
Technical field
The present invention relates to the communications field, relate more specifically to business switch method and system.
Background technology
Interworking Function (Interworking Function, be called for short IWF), be a kind of equipment in the wireless network, it supports the circuit domain data business communicating function of wireless network and other network (as PSTN, ISDN, Internet, other PLMN), adopts asynchronous data to carry out long-range access, Email visit, Intranet access, ISP access, common data library searching, two business such as data terminal interconnect.
Position according to the IWF resource can be divided into IWF CDMA intercommunication function unit (CAMA Interworking Function is called for short CIWF) and The Shared InterWorking Function unit (Shared Interworking Function is called for short SIWF).Wherein, CIWF is based on the base station controller IWF function of (Base Station Controller is called for short BSC), and IWF equipment is connected on the BSC; SIWF is based on mobile switching centre's IWF function of (Mobile SwitchCenter is called for short MSC), and IWF equipment is connected on the MSC.Fig. 1 and Fig. 2 are respectively CIWF and SIWF networking diagram.
At present, IWF is mainly used in facsimile service, the main directly mode of fax that adopts of faxing in the CDMA mobile communication system, and promptly at caller input special prefix and called number, network side is directly set up facsimile service and is called out.In actual applications, exist advanced lang sound business to carry out the demand of facsimile service, main cause then:
1) with in once calling out, can't notify the other user to carry out to receive faxes preparation in advance, the other side's facsimile machine is not necessarily supported automated facsimile;
2) if be set to direct fax, then this number and facsimile machine can only if make a phone call, need be reset in order to facsimile service, troublesome poeration, and can't bring into play the function of voice call, circuit and utilization rate of equipment and installations are low.
3) Yi Qian method can't re-use after A mouth IPization.Before A mouth IPization, be time division multiplexing (Time Division Multiplexing is called for short TDM) carrying, there is encoding and decoding conversion (Transcoder is called for short TC) resource can detect the facsimile signal sound of core-network side on the BSC.After A mouth IPization, move on to MSC core net place on the TC resource, there has not been TC to detect resource among the BSC, the facsimile signal in the time of can't detecting voice and switch to fax; BSC just is forwarded to the wireless side message media gateway (MediaGateway is called for short MGW) after handling wireless protocols; In addition, at the long-range coding-decoding operation of encode/decode-free (Transcoder FreeOperation) TrFO/ (Remote Transcoder Operation, be called for short RTO) when activating, cause in the voice channel no TC resource or TC resource not in end office (EO), end office (EO) possibly can't detect, that is to say that MGW is under the situation of TrFO, because there is not the TC resource, can't detect voice and switch to the facsimile signal that facsimile machine sends when faxing, at this moment, facsimile signal does not have the place to detect except outside the travelling carriage (Mobile Station is called for short MS).Therefore, former operation flow needs to change.
Under separation architecture, MSC is divided into MGC and MGW, and Fig. 3 shows the structural representation of MSC under separation architecture.
Realized that in fixed communication network speech business switches to facsimile service, method is: the called fax of calling user dials PSTN number, connect back calling subscriber's advise called subscriber and need fax, on facsimile machine, send facsimile control signal by the called subscriber, Calling Side sends fax by the facsimile transmission key after receiving facsimile control signal, finishes voice to the service switch process of faxing.
Because most of fixed stations do not support Calling Side to initiate the IWF service negotiation at present, under the situation of original TDM, need to rely on the TC of BSC one side to detect, thereby initiate the professional change flow of IWF of caller from called CED signal.After A mouth IPization, the professional implementation of switching of voice facsimile realizes by the scheme of prior art one, and is as follows:
Can't initiate in the fixed station caller under the situation of professional change, the user can initiate FLASH operation (hooking), consults by being with outer dialing to initiate a FAX, and needs BSC and MSC to support the outer negotiation process of this band.
By mode: [Flash key: on facsimile machine, have individual button to be called the Flash key, the effect of the similar hooking of the effect of this key by the Flash key.Because the time duration of common hooking is uncertain, so, by the Flash key, can produce the hooking time of a standard of comparison.Hooking, be exactly phone under talking state, short time on-hook, and then off-hook.]
After the networking of A mouth IPization, IP-BSC can't detect the CED signal of fax, and caller MS can't finish the switching of voice to fax automatically.At present the design that fax cut in voice is a configuration flash prefix on MGC, and manually flash switches to fax from voice.Test at present finds that this scheme has following two fatal shortcomings:
1) operation does not meet custom:
After voice are connected, when facsimile service switches, the called switching that can finish voice to fax; The calling subscriber must manually come manual switchover (if facsimile machine does not have the flash button, can only switch by hooking), client's poor operability of this scheme by flash prefix+flash key+send.
2) the very bad assurance of the time point of manual switchover:
If it is too early that caller is manually cut, caller meeting etc. will discharge facsimile service less than called DIS facsimile signal.If cut too late, called grade also can discharge facsimile service less than the DCS facsimile signal of caller.Laboratory tests tens times, the time point that seek to switch, could successful switch several times, so success rate is very low.Yet DIS and DCS message, because of different fixed stations different with facsimile machine, so actual commercialization is impossible certainly.
In the prior art two, come support voice fax changing method by the signaling plane extended mode.Here carry the iwf business information by changing encoding and decoding message, making BSC switch its encoding and decoding is the corresponding encoding and decoding of IWF, and BSC initiates notice MS service switch process, and then notifies MSC to carry out handoff request, inserts IWF by MSC then.This method can be applied on the network of CDMA IPization, comprises A mouth IPization and IP core networkization.
Mainly comprise the comprehensive of following flow process: service negotiation flow process of eating dishes without rice or wine and direct-cut operation flow process, carrying switching flow between the MGC and encoding and decoding are switched (the professional switching) flow process.
Prior art two need be expanded signaling plane, and introduces the expansion of SDP.Need the message content between expansion MSC and the BS.
Summary of the invention
The objective of the invention is to, in mobile communication system, in CDMA mobile communication system, after A mouth IPization, realize the handoff functionality of speech business to the IWF business of facsimile service, and can make the variation that the user can't sensing network, so the present invention proposes a kind of business switch method and system.
According to an aspect of the present invention, a kind of business switch method has been proposed.This method comprises: step S102, in the voice call process, when callee's travelling carriage receives the professional switching signal sound of called subscriber equipment, carry out service negotiation and direct-cut operation by callee's base station controller, set up being connected of callee and Interworking Function; Step S106, calling party's base station controller are by message in the receiving belt, and beginning is professional switches, and sets up the connection between calling party and the calling party's Interworking Function, finishes professional the switching; All set up respectively under the situation about being connected of described calling party/callee's Interworking Function described calling party and described callee, when described calling party was in identical end office (EO) with described callee, callee and/or calling party's Media Gateway Controller was according to judging the fax direction from described callee and/or calling party's the base station controller or the business request information of callee and/or the reception of calling party media gateway; And when described calling party was in different end office (EO) with described callee, whether described callee and/or calling party media gateway controller basis receive described calling party and/or callee's described business request information was determined facsimile transmission side.
In above-mentioned business switch method, between step S102 and step S106, comprising: step S104, callee mobile switching centre initiates the carrying handoff request to calling party mobile exchange center, and calling party mobile exchange center is carried switching.
Alternatively, in above-mentioned business switch method, may further comprise the steps among the step S106: calling party's base station controller is judged fax calling and called direction by message in the receiving belt, sends handoff request message to calling party mobile exchange center; Callee mobile switching centre initiates the carrying handoff request to calling party mobile exchange center, and calling party mobile exchange center is carried switching; And, after calling party's base station controller is received replying of calling party mobile exchange center, begin to carry out business and switch, set up being connected of calling party and calling party's Interworking Function, finish professional switching.
In above-mentioned business switch method, further may further comprise the steps among the step S102: before callee's Interworking Function activates, callee's base station controller breaks into message with the CED fax tone message that callee's travelling carriage sends, and sends to callee mobile switching centre by Media layer; Perhaps, after callee's Interworking Function activated, media gateway broke into message with the fax tone that callee's Interworking Function sends, and sends to calling party's base station controller.
In above-mentioned business switch method, message is at least among 2833/ced, 2833/v21flag, the 2833/cng.
In above-mentioned business switch method, among the step S104, by in carrying is switched, describing the beared information that corresponding fax requires, indicate to switch on the bearer types that is fit to facsimile service, wherein comprise following describing method at least: the attribute description during the expansion Session Description Protocol is described, adopt description in the V152 agreement, and in the expansion Session Description Protocol is described, increase privately owned description.
In above-mentioned business switch method, step S106 comprises: step S1062, and after calling party mobile exchange center is received the carrying handoff request, switching carrier; Step S1064, calling party's base station controller judge fax calling and called direction by message in the receiving belt, send handoff request message to calling party mobile exchange center; And step S1066, after calling party's base station controller is received replying of calling party mobile exchange center, begin to carry out business and switch, set up being connected of calling party and calling party's Interworking Function, finish professional switching.
According to a further aspect in the invention, a kind of service switchover system is provided, this system comprises: the callee connects apparatus for establishing, be positioned at callee's side, be used in the voice call process, when callee's travelling carriage received the professional switching signal sound of called subscriber equipment, the base station controller by the callee carried out service negotiation and direct-cut operation, sets up being connected of callee and callee's Interworking Function; And the calling party connects apparatus for establishing, is positioned at calling party's side, is used to make calling party's base station controller by professional switching of start of heading in the receiving belt, sets up the connection between calling party and the calling party's Interworking Function, finishes professional the switching; All set up under the situation of the connection of arriving described calling party/callee's Interworking Function described calling party and/or callee, when described calling party was in identical end office (EO) with described callee, callee and/or calling party media gateway controller were according to judging the fax direction from the business request information of described callee and/or callee's base station controller or callee and/or the reception of calling party media gateway; And when described calling party was in different end office (EO) with described callee, whether described callee and/or calling party media gateway controller basis receive described calling party and/or callee's described business request information was determined facsimile transmission side.
In above-mentioned service switchover system, comprise: carrying handoff request apparatus for initiating, between calling party and callee, be used to make callee mobile switching centre to initiate the carrying handoff request to calling party mobile exchange center, calling party mobile exchange center is carried switching.
Alternatively, in above-mentioned service switchover system, the calling party connects apparatus for establishing and comprises: the professional trigger module of calling party is used to make calling party's base station controller by message in the receiving belt, judge fax calling and called direction, send professional handoff request to calling party mobile exchange center; The calling party is carried the handoff request initiation module, is used for after calling party's base station controller triggers professional switching flow, makes callee mobile switching centre initiate the carrying handoff request to calling party mobile exchange center, and calling party mobile exchange center is carried switching; And the professional handover module of calling party, be used for after calling party's base station controller is received replying of calling party mobile exchange center, begin to carry out business and switch, set up being connected of calling party and calling party's Interworking Function, finish the business switching.
In above-mentioned service switchover system, the callee connects in the apparatus for establishing and further comprises: base station controller message sending module, be used for before callee's Interworking Function activates, the CED fax tone message that callee's base station controller is sent travelling carriage breaks into message and sends to callee mobile switching centre by Media layer; Perhaps, media gateway message sending module is used for after callee's Interworking Function activates, and the fax tone that media gateway is sent callee's Interworking Function breaks into message and sends to calling party's base station controller.
In above-mentioned service switchover system, calling party's base station controller receives in the following message at least one: 2833/ced, 2833/v21flag, 2833/cng.
In the above-mentioned service switchover system, the calling party is carried the handoff request apparatus for initiating, by in carrying is switched, describing the beared information that corresponding fax requires, indicate to switch on the bearer types that is fit to facsimile service, wherein comprise following describing method at least: the attribute description during the expansion Session Description Protocol is described, adopt description in the V152 agreement, and in the expansion Session Description Protocol is described, increase privately owned description.
In above-mentioned service switchover system, the calling party connects apparatus for establishing and comprises: the calling party is carried the handoff request module, is used for after calling party mobile exchange center is received the carrying handoff request switching carrier; The professional trigger module of calling party is used to make calling party's base station controller by message in the receiving belt, judges fax calling and called direction, sends professional handoff request to calling party mobile exchange center; And the professional handover module of calling party, be used for after calling party's base station controller is received replying of calling party mobile exchange center, begin to carry out business and switch, set up being connected of calling party and calling party's Interworking Function, finish the business switching.
The present invention also provides another business switch method, comprise: step S702, in the voice call process, when callee's travelling carriage receives the professional switching signal sound of called subscriber equipment, carry out service negotiation and direct-cut operation by callee's base station controller, set up being connected of callee and callee's Interworking Function; Step S704, switching is carried in calling party mobile exchange center and callee mobile switching centre, and after switching finished and activates callee's Interworking Function, callee's base station controller inserted the fax tone signal that the encoding and decoding resource detects the IP side; And step S706, detect the fax tone signal of IP side when calling party's base station controller after, calling party's base station controller is initiated professional the switching, sets up the connection between calling party and the calling party's Interworking Function, finishes professional the switching.
The present invention also provides another service switchover system, comprise: the callee connects apparatus for establishing, be positioned at callee's side, be used in the voice call process, when callee's travelling carriage receives the professional switching signal sound of called subscriber equipment, carry out service negotiation and direct-cut operation by callee's base station controller, set up being connected of callee and callee's Interworking Function; IP side fax tone signal supervisory instrument is used for the calling party and switching is carried in callee mobile switching centre, and after switching finished and activates callee's Interworking Function, callee's base station controller inserted the fax tone signal that the encoding and decoding resource detects the IP side; And the calling party connects apparatus for establishing, be positioned at calling party's side, be used for after calling party's base station controller detects the fax tone signal of IP side, calling party's base station controller is initiated professional the switching, set up the connection between calling party and the calling party's Interworking Function, finish professional the switching.
By the present invention, realized under the cdma mobile communication environment, under the situation of A mouth IPization or IP core networkization, realize the handoff functionality of speech business, and do not change user's use habit to the IWF business of facsimile service, be very easy to user's operation.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the block diagram that the CIWF networking structure is shown;
Fig. 2 is the block diagram that the SIWF networking structure is shown;
Fig. 3 shows the structural representation of MSC under separation architecture;
Fig. 4 is the flow chart that illustrates according to a kind of business switch method of the present invention;
Fig. 5 is the flow chart that the business switch method of a specific embodiment of the present invention is shown;
Fig. 6 is the block diagram that illustrates according to a kind of service switchover system of the present invention;
Fig. 7 is the flow chart that illustrates according to another kind of business switch method of the present invention; And
Fig. 8 is the block diagram that illustrates according to another kind of service switchover system of the present invention.
Embodiment
Below with reference to accompanying drawing, describe the specific embodiment of the present invention in detail.
With reference to figure 4, illustrate according to business switch method of the present invention.This method comprises: step S102, in the voice call process, when callee's travelling carriage received the professional switching signal sound of called subscriber equipment, the base station controller by the callee carried out service negotiation and direct-cut operation, sets up being connected of callee and Interworking Function; And step S106, calling party's base station controller is by message in the receiving belt, and beginning is professional switches, and sets up the connection between calling party and the calling party's Interworking Function, finishes professional the switching.
Wherein, between step S102 and step S106, comprising: step S104, callee mobile switching centre initiates the carrying handoff request to calling party mobile exchange center, and calling party mobile exchange center is carried switching.
Alternatively, may further comprise the steps among the step S106: calling party's base station controller is judged fax calling and called direction by message in the receiving belt, sends handoff request message to calling party mobile exchange center; Callee mobile switching centre initiates the carrying handoff request to calling party mobile exchange center, and calling party mobile exchange center is carried switching; And, after calling party's base station controller is received replying of calling party mobile exchange center, begin to carry out business and switch, set up being connected of calling party and calling party's Interworking Function, finish professional switching.
Wherein, further may further comprise the steps among the step S102: before callee's Interworking Function activates, callee's base station controller breaks into message with the fax tone message such as CED that callee's travelling carriage sends, and sends to callee mobile switching centre by Media layer; Perhaps, after callee's Interworking Function activated, media gateway broke into message with the fax tone that Interworking Function sends, and sends to calling party's base station controller.
Wherein, message is at least among 2833/ced, 2833/v21flag, the 2833/cng one.
Wherein, among the step S104, by in carrying is switched, describing the beared information that corresponding fax requires, indicate to switch on the bearer types that is fit to facsimile service, wherein comprise following describing method at least: the attribute description during the expansion Session Description Protocol is described, adopt description in the V152 agreement, and in the expansion Session Description Protocol is described, increase privately owned description.
Wherein, step S106 comprises the following steps: step S1062, after calling party mobile exchange center is received the carrying handoff request, and switching carrier; Step S1064, calling party's base station controller judge fax calling and called direction by message in the receiving belt, send handoff request message to calling party mobile exchange center; And step S1066, after calling party's base station controller is received replying of calling party mobile exchange center, begin to carry out business and switch, set up being connected of calling party and calling party's Interworking Function, finish professional switching.
Wherein, all set up respectively under the situation about being connected of calling party/callee's Interworking Function calling party and callee: when the calling party was in identical end office (EO) with the callee, callee and/or calling party's Media Gateway Controller was according to judging the fax direction from callee and/or calling party's the base station controller or the business request information of callee and/or the reception of calling party media gateway; And when the calling party was in different end office (EO) with the callee, whether callee and/or calling party media gateway controller basis receive calling party and/or callee's business request information was determined facsimile transmission side.
Below with reference to Fig. 5 a specific embodiment of the present invention is described.Fig. 5 is that BSC triggers the schematic flow sheet that switching flow realizes that voice switch to the IWF business by detecting the 2833/CED sound, may further comprise the steps:
Both sides are carrying out voice call:
1) callee MS receives the CED sound that facsimile machine sends, and identifies this speech business and need switch facsimile service, sends message informing to called BSC and detects fax tone, and requested service switches;
2) called MS notice BS detects the CED sound, and requested service switches;
3) called BS receives the business switching message that called MS sends, and identifies this speech business and need switch facsimile service, responds professional switching response message;
4) called BS sends Service Request (service request) message to called MS, initiates the service negotiation flow process;
5) called MS sends Service Response message for called BS, accepts the facsimile data business option;
6) called BS sends HandoffRequired (handoff request) message to called MS C, initiates the direct-cut operation flow process, and Target cell is current Active Set, and business option is the facsimile data business;
7) called MS C finishes relevant treatment, sends the HANDOFFREQUEST response message for same called BS;
8) called BS fax tone message such as CED that called MS is sent break into the 2833/CED message and send on the called MS C by Media layer; After perhaps waiting called IWF to activate, the fax tone that called IWF sends by MGW break into the 2833/ced|V21flag message send to BS. see step (27) (called MS finish by called BS and called IWF between voice to the service surface Signalling exchange of fax switching);
9) called MS C finishes the service channel that is established to called IWF network element;
10) called MS C initiates the carrying handoff request to caller MSC;
11) caller MSC waits for that caller BSC initiates handoff request;
12) caller BS receives the 2833/CED message, and it is thought and receives corresponding fax tone from Media layer, judges fax calling and called direction, triggers it and begins professional switching flow;
13) caller BS initiates professional handoff request to caller MS;
14) the professional handoff request of caller MS response caller BS is replied;
15) caller BS sends Handoff Required message to MSC, initiates the direct-cut operation flow process, and Target cell is current Active Set, and business option is the facsimile data business;
16) caller MSC responds switching request response;
17) continue to describe the caller situation below: caller BS returns HandoffRequest Ack message and gives caller MSC;
18) caller MSC sends Handoff Command message to caller BS; (follow-up all is to describe the caller situation);
19) caller BS sends UHDM message for caller MS, carries the facsimile service configuration record;
20) caller MS returns acknowledgement message and gives caller BS;
21) caller BS begins to switch to caller MSC transmission Handoff Commenced message informing MSC travelling carriage;
22) caller MS successful switch sends HandoffCompletion message for caller BS to target traffic channel;
23) caller BS sends HandoffComplete message to caller MSC;
24) caller MSC sends Clear Command release source to caller BS;
25) caller BS sends Clear Complete message to caller MSC after having discharged source;
26) caller MS finish by caller BS and caller IWF between the service surface Signalling exchange that switches to fax of voice;
27) calling and called MS entered the facsimile service transmit data state after the calling and called side all was accomplished to the service surface Signalling exchange of IWF.
The present invention is directed to carrying switching in the core net, wherein, describe the corresponding beared information of faxing and requiring in carrying is switched, indicate to switch on the bearer types that is fit to facsimile service, wherein describing method is as follows:
1. the attribute description a=fax during expansion SDP describes or take description in the V152 agreement:
This mode is existing NGN technology, does not use in cdma network, for the intercommunication of compatible cdma network and NGN, takes the describing mode identical with NGN.
m＝audio?3456RTP/AVP?98
a＝fax
The perhaps description in the V152 agreement
m＝audio?3456RTP/AVP?98
a＝rtpmap:98PCMU/8000
a＝gpmd:98vbd＝yes
2. during expansion SDP describes, increase privately owned description:
m＝audio?3456RTP/AVP?98
a＝fax，
A=fmtp:98CED or a=fmtp:98CNG or a=fmtp:98V21flag
m＝audio?3456RTP/AVP?98
a＝rtpmap:98PCMU/8000
a＝gpmd:98vbd＝yes
A=fmtp:98CED or a=fmtp:98CNG or a=fmtp:98V21flag
Method: by the description of expansion SDP, fmtp is following description in the SDP agreement:
Attribute=fmtp: the concrete parameter of form form
By define CED in concrete parameter, CNG, V21flag come the detected corresponding facsimile signal of indication between MGC, judge it is fax caller or callee by playing a game.CNG wherein: refer to the calling party that faxes; CED: refer to the callee that faxes; V21flag: refer to the at first detected fax calling party that is.For following attribute:
a＝fmtp:<format><format?specific?parameters>
This attribute allows the concrete parameter of special format (format) to transmit in the mode that a kind of SDP need not understand.Form (format) must be to illustrate in the media description (m=).
As seen, carry out business at MGC notice BSC and switch, the present invention has expanded existing encoding and decoding switching flow.
After core net obtains the facsimile service indication, can notify originating switch to carry out business and switch, on Notification Method is seen.When the MSC of end office (EO) received professional handoff request, first switching carrier waited for that then caller BSC carries out business and switches (switching to the facsimile service state).Behind 2833/CED or the 2833/V21flag message, notice MSC carried out business and switches, and notice MS carries out business switching, the flow process when follow-up flow process is the TDM interface with the A mouth in BSC received and is with.
The processing of the fax direction when activating IWF for MGC: for intra-office, MGC can report signal to know the fax direction according to BSC/MGW, and for interoffice, the MGC of end office (EO) can determine facsimile transmission side according to the detected facsimile signal that BS reports.
Below with reference to Fig. 6, illustrate according to service switchover system of the present invention.This system comprises: the callee connects apparatus for establishing 610, be positioned at callee's side, be used in the voice call process, when callee's travelling carriage receives the professional switching signal sound of called subscriber equipment, base station controller by the callee carries out service negotiation and direct-cut operation, sets up being connected of callee and callee's Interworking Function; And the calling party connects apparatus for establishing 620, is positioned at calling party's side, is used to make calling party's base station controller by professional switching of start of heading in the receiving belt, sets up the connection between calling party and the calling party's Interworking Function, finishes professional the switching.
Wherein, comprise in the above-mentioned service switchover system: carrying handoff request apparatus for initiating (not shown), between calling party and callee, be used to make callee mobile switching centre to initiate the carrying handoff request to calling party mobile exchange center, calling party mobile exchange center is carried switching.
Alternatively, the calling party connects in the apparatus for establishing 620 and comprises: the professional trigger module (not shown) of calling party, be used to make calling party's base station controller by message in the receiving belt, judge fax calling and called direction, carry out professional handoff request to calling party mobile exchange center; The calling party is carried handoff request initiation module (not shown), be used for after calling party's base station controller triggers professional switching flow, make callee mobile switching centre initiate the carrying handoff request to calling party mobile exchange center, calling party mobile exchange center is carried switching; And the professional handover module (not shown) of calling party, be used for after calling party's base station controller is received replying of calling party mobile exchange center, begin to carry out business and switch, set up being connected of calling party and calling party's Interworking Function, finish the business switching.
Wherein, the callee connects in the apparatus for establishing 610 and further comprises: base station controller message sending module (not shown), be used for before callee's Interworking Function activates, the fax tone message such as CED that callee's base station controller is sent travelling carriage break into message and send to callee mobile switching centre by Media layer; Perhaps media gateway message sending module (not shown) is used for after callee's Interworking Function activates, and the fax tone that media gateway is sent Interworking Function breaks into message and sends to calling party's base station controller.
Wherein, calling party's base station controller receives in the following message at least one: 2833/ced, 2833/v21flag, 2833/cng.
Wherein, the calling party is carried the handoff request apparatus for initiating, by in carrying is switched, describing the beared information that corresponding fax requires, indicate to switch on the bearer types that is fit to facsimile service, wherein comprise following describing method at least: the attribute description during the expansion Session Description Protocol is described, adopt description in the V152 agreement, and in the expansion Session Description Protocol is described, increase privately owned description.
Alternatively, the calling party connects apparatus for establishing 620 and comprises: the calling party is carried handoff request module (not shown), is used for after calling party mobile exchange center is received the carrying handoff request switching carrier; The professional trigger module (not shown) of calling party is used to make calling party's base station controller by message in the receiving belt, judges fax calling and called direction, carries out professional handoff request to calling party mobile exchange center; And the professional handover module (not shown) of calling party, be used for after calling party's base station controller is received replying of calling party mobile exchange center, begin to carry out business and switch, set up being connected of calling party and calling party's Interworking Function, finish the business switching.
Wherein, all set up under the situation about being connected of calling party/callee's Interworking Function with/callee the calling party, when the calling party was in identical end office (EO) with the callee, callee and/or calling party media gateway controller were according to judging the fax direction from the business request information of callee and/or callee's base station controller or callee and/or the reception of calling party media gateway; And when the calling party was in different end office (EO) with the callee, whether callee and/or calling party media gateway controller basis receive calling party and/or callee's business request information was determined facsimile transmission side.
By as can be known above, in the voice call process, calling subscriber's advise called subscriber sends facsimile control signal and promptly sends fax tone such as CED in Traffic Channel on terminal equipment (te).After the MS at called subscriber place detects fax tone such as CED, notify callee BSC to initiate service request, the side that callee BSC is connected with MGC triggers switching flow, trigger the process of service negotiation in the side of eating dishes without rice or wine, be established to being connected of IWF with eating dishes without rice or wine at the A interface respectively, this moment, MGC notice IWF set up called mode.MGC this moment can switching carrier, until the calling subscriber place, then, Calling Side MGC caller notification BSC initiation business switches to fax.Follow-up flow process is identical with A mouth IPization flow process before.The calling and called user has set up the connection of IWF like this, begins to carry out facsimile service, has realized that voice switch to the business of fax.
Fig. 7 is the flow chart that illustrates according to another kind of business switch method of the present invention, this method may further comprise the steps: step S702, in the voice call process, when callee's travelling carriage receives the professional switching signal sound of called subscriber equipment, carry out service negotiation and direct-cut operation by callee's base station controller, set up being connected of callee and callee's Interworking Function; Step S704, switching is carried in calling party mobile exchange center and callee mobile switching centre, and after switching finished and activates callee's Interworking Function, base station controller inserted the fax tone signal that the encoding and decoding resource detects the IP side; And step S706, detect the fax tone signal of IP side when base station controller after, calling party's base station controller is initiated professional the switching, sets up the connection between calling party and the calling party's Interworking Function, finishes professional the switching.
Fig. 8 is the block diagram that illustrates according to another kind of service switchover system of the present invention, this system comprises: the callee connects apparatus for establishing 810, be positioned at callee's side, be used in the voice call process, when callee's travelling carriage receives the professional switching signal sound of called subscriber equipment, carry out service negotiation and direct-cut operation by callee's base station controller, set up being connected of callee and callee's Interworking Function; IP side fax tone signal supervisory instrument 820 is used to make calling party and callee mobile switching centre to carry switching, and after switching finished and activates callee's Interworking Function, base station controller inserted the fax tone signal that the encoding and decoding resource detects the IP side; And the calling party connects apparatus for establishing 830, be positioned at calling party's side, be used for after base station controller detects the fax tone signal of IP side, calling party's base station controller is initiated professional the switching, set up the connection between calling party and the calling party's Interworking Function, finish professional the switching.
By the above as can be known, the present invention has realized under the cdma mobile communication environment, under the situation of A mouth IPization, realizes the handoff functionality of speech business to the IWF business of facsimile service, and does not change user's use habit, and is greatly user-friendly.And the flow process compatibility is fine.By transmitting facsimile signal in being with, fax switches in time, and success rate improves.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (16)
1. a business switch method is characterized in that, comprising:
Step S102, in the voice call process, when callee's travelling carriage receives the professional switching signal sound of called subscriber equipment, carry out service negotiation and direct-cut operation by callee's base station controller, set up being connected of described callee and callee's Interworking Function; And
Step S106, calling party's base station controller are by message in the receiving belt, and beginning is professional switches, and sets up the connection between described calling party and the described calling party's Interworking Function, finishes professional the switching;
All set up respectively under the situation about being connected of described calling party/callee's Interworking Function described calling party and described callee,
When described calling party was in identical end office (EO) with described callee, callee and/or calling party's Media Gateway Controller was according to judging the fax direction from described callee and/or calling party's the base station controller or the business request information of callee and/or the reception of calling party media gateway; And
When described calling party was in different end office (EO) with described callee, whether described callee and/or calling party media gateway controller basis receive described calling party and/or callee's business request information was determined facsimile transmission side.
2. business switch method according to claim 1 is characterized in that, comprises between described step S102 and step S106:
Step S104, callee mobile switching centre initiates the carrying handoff request to calling party mobile exchange center, and calling party mobile exchange center is carried switching.
3. business switch method according to claim 1 is characterized in that, may further comprise the steps among the described step S106,
Described calling party's base station controller is judged fax calling and called direction by message in the receiving belt, sends handoff request message to calling party mobile exchange center;
Callee mobile switching centre initiates the carrying handoff request to calling party mobile exchange center, and calling party mobile exchange center is carried switching; And
After described calling party's base station controller is received replying of described calling party mobile exchange center, begin to carry out business and switch, set up being connected of described calling party and described calling party's Interworking Function, finish professional switching.
4. business switch method according to claim 2 is characterized in that, further may further comprise the steps among the described step S102,
Before callee's Interworking Function activated, callee's base station controller broke into message with the CED fax tone message that callee's travelling carriage sends, and sends to callee mobile switching centre by Media layer; Perhaps
After callee's Interworking Function activated, media gateway broke into message with the fax tone that callee's Interworking Function sends, and sends to calling party's base station controller.
5. business switch method according to claim 4 is characterized in that, described message is at least among 2833/ced, 2833/v21flag, the 2833/cng.
6. business switch method according to claim 4, it is characterized in that, among the described step S104, by in carrying is switched, describing the beared information that corresponding fax requires, indicate to switch on the bearer types that is fit to facsimile service, wherein comprise following describing method at least:
Attribute description during the expansion Session Description Protocol is described, adopt description in the V152 agreement, and in the expansion Session Description Protocol is described, increase privately owned description.
7. business switch method according to claim 6 is characterized in that described step S106 comprises the following steps:
Step S1062, after described calling party mobile exchange center is received described carrying handoff request, switching carrier;
Step S1064, described calling party's base station controller judge fax calling and called direction by message in the receiving belt, send handoff request message to described calling party mobile exchange center; And
Step S1066 after described calling party's base station controller is received replying of described calling party mobile exchange center, begins to carry out business and switches, and sets up being connected of described calling party and described calling party's Interworking Function, finishes professional switching.
8. a service switchover system is characterized in that comprising,
The callee connects apparatus for establishing, be positioned at callee's side, be used in the voice call process, when described callee's travelling carriage receives the professional switching signal sound of called subscriber equipment, base station controller by the callee carries out service negotiation and direct-cut operation, sets up being connected of callee and callee's Interworking Function; And
The calling party connects apparatus for establishing, is positioned at calling party's side, is used to make calling party's base station controller by professional switching of start of heading in the receiving belt, sets up the connection between described calling party and the described calling party's Interworking Function, finishes professional the switching;
All set up under the situation of the connection of arriving described calling party/callee's Interworking Function described calling party and/or callee,
When described calling party was in identical end office (EO) with described callee, callee and/or calling party media gateway controller were according to judging the fax direction from the business request information of described callee and/or callee's base station controller or callee and/or the reception of calling party media gateway; And
When described calling party was in different end office (EO) with described callee, whether described callee and/or calling party media gateway controller basis receive described calling party and/or callee's business request information was determined facsimile transmission side.
9. service switchover system according to claim 8 is characterized in that comprising,
Carrying handoff request apparatus for initiating between calling party and callee, is used to make callee mobile switching centre to initiate the carrying handoff request to calling party mobile exchange center, and calling party mobile exchange center is carried switching.
10. service switchover system according to claim 8 is characterized in that the calling party connects in the apparatus for establishing and comprises,
The professional trigger module of calling party is used to make described calling party's base station controller by message in the receiving belt, judges fax calling and called direction, sends professional handoff request to calling party mobile exchange center;
The calling party is carried the handoff request initiation module, is used for after calling party's base station controller triggers professional switching flow, makes callee mobile switching centre initiate the carrying handoff request to calling party mobile exchange center, and calling party mobile exchange center is carried switching; And
The professional handover module of calling party, be used for after described calling party's base station controller is received replying of described calling party mobile exchange center, begin to carry out business and switch, set up being connected of described calling party and described calling party's Interworking Function, finish professional switching.
11. service switchover system according to claim 9 is characterized in that, described callee connects in the apparatus for establishing and further comprises,
Base station controller message sending module is used for before callee's Interworking Function activates, and the CED fax tone message that callee's base station controller is sent travelling carriage breaks into message and sends to callee mobile switching centre by Media layer; Perhaps
Media gateway message sending module is used for after callee's Interworking Function activates, and the fax tone that media gateway is sent callee's Interworking Function breaks into message and sends to calling party's base station controller.
12. service switchover system according to claim 11 is characterized in that, described calling party's base station controller receives in the following message at least one: 2833/ced, 2833/v21flag, 2833/cng.
13. service switchover system according to claim 11 is characterized in that,
The calling party is carried the handoff request apparatus for initiating, switches on the bearer types that is fit to facsimile service by describing the beared information that corresponding fax requires in carrying is switched, indicating, and wherein comprises following describing method at least:
Attribute description during the expansion Session Description Protocol is described, adopt description in the V152 agreement, and in the expansion Session Description Protocol is described, increase privately owned description.
14. service switchover system according to claim 13 is characterized in that, described calling party connects apparatus for establishing and comprises:
The calling party is carried the handoff request module, is used for after described calling party mobile exchange center is received described carrying handoff request switching carrier;
The professional trigger module of calling party is used to make described calling party's base station controller by message in the receiving belt, judges fax calling and called direction, sends professional handoff request to described calling party mobile exchange center; And
The professional handover module of calling party, be used for after described calling party's base station controller is received replying of described calling party mobile exchange center, begin to carry out business and switch, set up being connected of described calling party and described calling party's Interworking Function, finish professional switching.
15. a business switch method is characterized in that, comprising:
Step S702, in the voice call process, when callee's travelling carriage receives the professional switching signal sound of called subscriber equipment, carry out service negotiation and direct-cut operation by callee's base station controller, set up being connected of described callee and callee's Interworking Function;
Step S704, switching is carried in calling party mobile exchange center and callee mobile switching centre, and after switching finished and activates callee's Interworking Function, callee's base station controller inserted the fax tone signal that the encoding and decoding resource detects the IP side;
And
Step S706, detect the fax tone signal of IP side when calling party's base station controller after, calling party's base station controller is initiated professional the switching, sets up the connection between described calling party and the described calling party's Interworking Function, finishes professional the switching.
16. a service switchover system is characterized in that, comprising:
The callee connects apparatus for establishing, be positioned at callee's side, be used in the voice call process, when callee's travelling carriage receives the professional switching signal sound of called subscriber equipment, carry out service negotiation and direct-cut operation by callee's base station controller, set up being connected of described callee and callee's Interworking Function;
IP side fax tone signal supervisory instrument is used for the calling party and switching is carried in callee mobile switching centre, and after switching finished and activates callee's Interworking Function, callee's base station controller inserted the fax tone signal that the encoding and decoding resource detects the IP side; And
The calling party connects apparatus for establishing, be positioned at calling party's side, be used for after calling party's base station controller detects the fax tone signal of IP side, calling party's base station controller is initiated professional the switching, set up the connection between described calling party and the described calling party's Interworking Function, finish professional the switching.
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| CN200610149955A CN101166300B (en) | 2006-10-19 | 2006-10-19 | Service switching method and system |
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| CN200610149955A CN101166300B (en) | 2006-10-19 | 2006-10-19 | Service switching method and system |
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| CN101166300A CN101166300A (en) | 2008-04-23 |
| CN101166300B true CN101166300B (en) | 2010-05-19 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101527999B1 (en) | 2009-06-10 | 2015-06-10 | 애플 인크. | Providing an indicator of presence of a first access network that is capable of interworking with a second access network |
| CN102547634B (en) * | 2010-12-10 | 2015-10-28 | 中兴通讯股份有限公司 | Realize the system and method turning fax across the voice of agreement |
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| US5726764A (en) * | 1993-07-21 | 1998-03-10 | Motorola, Inc. | Apparatus and method for providing data and facsimile services in a RF communication system |
| CN1622583A (en) * | 2003-11-28 | 2005-06-01 | 华为技术有限公司 | Method for implementing facsimile in next generation network |
| CN1801874A (en) * | 2005-01-07 | 2006-07-12 | 华为技术有限公司 | Method for realizing voice service switching to fax service |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5726764A (en) * | 1993-07-21 | 1998-03-10 | Motorola, Inc. | Apparatus and method for providing data and facsimile services in a RF communication system |
| CN1622583A (en) * | 2003-11-28 | 2005-06-01 | 华为技术有限公司 | Method for implementing facsimile in next generation network |
| CN1801874A (en) * | 2005-01-07 | 2006-07-12 | 华为技术有限公司 | Method for realizing voice service switching to fax service |
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