CN1801874A - Method for realizing voice service switching to fax service - Google Patents
Method for realizing voice service switching to fax service Download PDFInfo
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- CN1801874A CN1801874A CN 200510006628 CN200510006628A CN1801874A CN 1801874 A CN1801874 A CN 1801874A CN 200510006628 CN200510006628 CN 200510006628 CN 200510006628 A CN200510006628 A CN 200510006628A CN 1801874 A CN1801874 A CN 1801874A
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Abstract
Present invention discloses method to realize switching voice service to facsimile service. Said method includes transmitting pre - configured indicating facsimile service feature code to soft exchange server ( MSCe ) through base station controller ( BSC ), MSCe notifying current voice service link hung source facsimile network gateway entity to switch, said hung source facsimile gateway entity opening source facsimile gateway, MSCe or said MS notifying hung target facsimile gateway entity to switch facsimile service, said hung target facsimile gateway entity opening target facsimile gateway, establishing facsimile service channel. Said invention can switch current voice service to facsimile service.
Description
Technical field
The present invention relates to facsimile service realization technology, particularly based on realizing the method that speech business is switched to facsimile service in the mobile communications network of soft switch
Background technology
At present, sending a fax by portable terminal (MS) is application circuit type data service (CSD) more widely, the user need switch to facsimile service from current speech business when initiating facsimile service, that is: the user is in communication process, if the needs that send fax are arranged, just under the situation of not cutting off calling, set up the facsimile service passage, thereby switch to facsimile service, use the facsimile service passage of being set up to send fax then.
Wherein, when facsimile service switches, need a kind of facsimile service testing mechanism, after detecting the user and initiating facsimile service, open the relevant device of facsimile service, set up the facsimile service passage in speech business.Be example with CDMA/CDMA 2000/CDMA 1X system below, present speech business is illustrated to the method that facsimile service switches.
In CDMA/CDMA 2000/CDMA 1X legacy circuit-switched system, detect the initiation situation of facsimile service by audio coder ﹠ decoder (codec) (TC), and after detecting terminal initiation facsimile service, open fax gateway.Wherein, described TC is arranged in the base station controller (BSC) usually; Described fax gateway is realized by data interchange unit (IWF) usually, and be connected with mobile switching centre (MSC), be used for the digital signal of facsimile machine output by International Telecommunication Union T.30 agreement carry out data transaction, it can be transmitted on analog channel.When the user initiates facsimile service, TC can detect facsimile signal and notify BSC, BSC sets up radio link protocol (RLP) layer link subsequently between self and MS, and notify MSC in speech channel, to be connected in series fax gateway IWF equipment, so just finished the handoff procedure of speech business to facsimile service.
At present, in the CDMA/CDMA 2000/CDMA1X system based on all internet protocol (IP) Softswitch technology, facsimile signal at network side by the IP link bearer, like this, at the two ends of IP link source fax gateway IWF and purpose fax gateway IWF need be set respectively, when switching, facsimile service must open fax gateway IWF, when the facsimile service media flow transmission, described fax gateway IWF will be used for by ITU T.38 agreement carry out the T.30 mutual conversion between the Fax over IP signal of the circuit type facsimile signal of agreement and Internet Facsimile Protocol (IFP) of ITU.But, based on the CDMA/CDMA 2000/CDMA 1X system of all-IP Softswitch technology encoding and decoding speech operation (Trfo) function is exempted from application, that is: do not use TC.Like this, just can not rely on TC to detect facsimile signal, open IWF, also just can't switch to facsimile service.
Therefore, existing CDMA/CDMA 2000/CDMA 1X system based on the all-IP Softswitch technology, the neither one reasonable mechanism determines whether the user initiates facsimile service, also just can't determine when to carry out the switching of speech business to facsimile service.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of and realizes speech business to the method that facsimile service switches, can determine when the user initiates facsimile service, and opens fax gateway, thereby finishes the switching to facsimile service.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention discloses a kind of method that realizes that speech business is switched to facsimile service, this method comprises:
When the current portable terminal (MS) of having set up the speech business link is initiated facsimile service, the condition code of predefined indication facsimile service is sent to soft switching server (MSCe) by base station controller (BSC);
Switched to facsimile service by the entity that articulates the source fax gateway in the MSCe notice current speech service link, this entity that articulates the source fax gateway is opened the source fax gateway;
The entity that is articulated the purpose fax gateway by MSCe or described MS notice switches to facsimile service, and this articulates the entity purpose of opening fax gateway of purpose fax gateway, sets up the facsimile service passage.
Wherein, the terminal of non-initiation facsimile service side is the Public Switched Telephone Network terminal in the described current speech service link; The entity that the described entity that articulates the source fax gateway connects when carrying section for the IP that initiates facsimile service MS access current speech service link at first, this entity is for initiating facsimile service MS affiliated BSC or media gateway (MGW); The described entity that articulates the purpose fax gateway is that described PSTN terminal inserts the MGW that connects at first when described IP carries section.
Wherein, the terminal of non-initiation facsimile service side is MS in the described current speech service link; The entity that the IP of the MS access current speech service link that the described entity that articulates the source fax gateway is the initiation facsimile service connects when carrying section at first, this entity is affiliated BSC or MGW of this MS; The entity that the IP of the MS access current speech service link that the described entity that articulates the purpose fax gateway is non-initiation facsimile service connects when carrying section at first, this entity is BSC or the MGW under this MS.
Wherein, when notifying the entity that articulates the purpose fax gateway when facsimile service switches by MSCe, this method further comprises: the MS of non-initiation facsimile service sends described condition code to MSCe by the BSC under self; The MSCe that described notice articulates source fax gateway entity is: the MSCe that receives condition code from the MS that initiates facsimile service; The MSCe that described notice articulates purpose fax gateway entity is: the MSCe that receives condition code from the MS of non-initiation facsimile service; Described MSCe notice articulates source fax gateway entity: the MSCe that described notice articulates source fax gateway entity notifies the entity that articulates the source fax gateway to switch to facsimile service after receiving condition code; The MSCe that described notice articulates purpose fax gateway entity notifies the entity that articulates the purpose fax gateway to switch to facsimile service after receiving condition code.
Wherein, when notifying the entity that articulates the purpose fax gateway when facsimile service switches by MSCe, this method further comprises: the MS of non-initiation facsimile service sends described condition code to MSCe by the BSC under self; The MSCe that described notice articulates source fax gateway entity is: the MSCe that receives condition code from the MS that initiates facsimile service; The MSCe that described notice articulates purpose fax gateway entity is: the MSCe that receives condition code from the MS of non-initiation facsimile service; Described notice articulates the MSCe of source fax gateway entity and notifies the MSCe that articulates purpose fax gateway entity is different entities, the method that described MSCe notice articulates source fax gateway entity and articulates purpose fax gateway entity is: the MSCe notice opposite end MSCe that at first receives condition code switches to facsimile service, and is receiving the entity that the back notice articulates the fax gateway of self control of replying of this opposite end MSCe; This opposite end MSCe learns that after facsimile service switched and receives condition code, notice articulated the entity of the fax gateway of self controlling; The described MSCe that at first receives condition code articulates source fax gateway entity for notice or articulates the MSCe of purpose fax gateway entity; Corresponding, described opposite end MSCe articulates purpose fax gateway entity for notice or articulates the MSCe of source fax gateway entity.
Wherein, when the entity that is articulated the purpose fax gateway by the MSCe notice switches to facsimile service, and when notifying the MSCe that articulates source fax gateway entity and notifying the MSCe that articulates purpose fax gateway entity to be different entities, the MSCe that described notice articulates source fax gateway entity is: the MSCe that receives condition code from the MS that initiates facsimile service; Described MSCe notice articulates source fax gateway entity: the MSCe that described notice articulates source fax gateway entity receives after the condition code, notifies described notice MSCe that articulates purpose fax gateway entity and the entity that articulates the source fax gateway to switch to facsimile service; The MSCe that this notice articulates purpose fax gateway entity learns that after facsimile service switched, the entity that notice articulates the purpose fax gateway switched to facsimile service.
Wherein, when the entity that is articulated the purpose fax gateway by the MSCe notice switches to facsimile service, and when notifying the MSCe that articulates source fax gateway entity and notifying the MSCe that articulates purpose fax gateway entity to be different entities, the MSCe that described notice articulates source fax gateway entity is: the MSCe that receives condition code from the MS that initiates facsimile service; Described MSCe notice articulates source fax gateway entity: the MSCe that described notice articulates source fax gateway entity receives after the condition code, the MSCe that notifies described notice to articulate purpose fax gateway entity switches to facsimile service, and receive this notice articulate purpose fax gateway entity MSCe reply the entity that back notice articulates the source fax gateway; The MSCe that this notice articulates purpose fax gateway entity learns after facsimile service switches, and articulates the MSCe echo reply of source fax gateway entity to described notice, and notifies the entity that articulates the purpose fax gateway to switch to facsimile service.
Wherein, described notice articulates the MSCe of source fax gateway entity and MSCe that notice articulates purpose fax gateway entity is same entity.
Wherein, when notifying the entity that articulates the purpose fax gateway when facsimile service switches by described MS, the MSCe that described notice articulates source fax gateway entity is: the MSCe that receives condition code from the MS that initiates facsimile service; After the entity that articulates the source fax gateway is opened the source fax gateway, articulate the entity purpose of opening fax gateway of purpose fax gateway again by this MS notice.
Wherein, facsimile signal is notified the entity that articulates the purpose fax gateway in the band that sends of the facsimile equipment that connects by self of described MS.
Wherein, described terminal, BSC, MSCe, articulate the entity of source fax gateway and articulate and use out-of-band signalling to communicate between the entity of purpose fax gateway.
Wherein, when the MS of described initiation facsimile service sent condition code to MSCe by BSC, employed out-of-band signalling was that service attribute changes request.
Wherein, when described MSCe notice articulated the entity of source fax gateway and/or articulates the entity of purpose fax gateway, employed out-of-band signalling was the service attribute update request.
Wherein, Media Stream switching equipment in the current speech service link is learnt to facsimile service and is switched, and when self having used echo canceller function (EC) and/or remote speech codec functions (RTO), this method further comprises: the Media Stream switching equipment in the described current speech service link is closed self employed EC and/or RTO.
By such scheme as can be seen, key of the present invention is: notify the MSCe of Controlling Source fax gateway to switch to facsimile service by the condition code of predefined indication facsimile service when the current MS that sets up the speech business link initiates facsimile service, this MSCe notifies the entity unlatching that articulates source fax gateway and purpose fax gateway fax gateway separately more respectively.
Therefore, realization speech business provided by the present invention can utilize the out-of-band signalling between the soft switchcall server entity to determine whether to switch to facsimile service to the method that facsimile service switches, thereby open fax gateway the current speech business is switched to facsimile service, a kind of execution mode among the present invention can also be realized the switching to facsimile service under the incompatible situation of the soft switching server of Controlling Source fax gateway and purpose fax gateway, the inventive method needn't be made amendment to the standard agreement of existing soft switchcall server, the implementation that a kind of the most practical and effective and feasible facsimile service of can yet be regarded as switches.
Description of drawings
Fig. 1 is that the cellular logic between MS and the Public Switched Telephone Network terminal concerns schematic diagram in the CDMA all-IP soft switchcall server;
Fig. 2 is MS shown in Figure 1 first kind of execution mode of the present invention, one a preferred embodiment handling process schematic diagram when initiating facsimile service;
Fig. 3 uses the inventive method from speech business overall process flow schematic diagram when facsimile service switches between MS and the PSTN terminal;
Fig. 4 is that the cellular logic between MS and the MS concerns schematic diagram in the CDMA all-IP soft switchcall server;
Fig. 5 is MS shown in Figure 4 first kind of execution mode of the present invention, one a preferred embodiment handling process schematic diagram when initiating facsimile service;
Fig. 6 uses the inventive method from speech business overall process flow schematic diagram when facsimile service switches between the MS.
Embodiment
The present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
Realization speech business provided by the present invention provides two kinds of execution modes to the method that facsimile service switches, these two kinds of execution modes are identical for the processing of initiating facsimile service side, that is: the MS that initiates facsimile service will indicate the condition code of facsimile service to be sent to the MSCe of Controlling Source fax gateway by BSC, and this MSCe opens the source fax gateway according to the entity that the condition code notice that receives articulates the source fax gateway; But the processing at non-initiation facsimile service side is different, and described processing is respectively: one, the MSCe of described Controlling Source fax gateway notice articulates the entity purpose of opening fax gateway of purpose fax gateway; Two, the MS of described initiation facsimile service side notifies the entity purpose of opening fax gateway that articulates the purpose fax gateway after the source fax gateway is opened.Wherein, in first kind of execution mode of the present invention, described terminal, BSC, MSCe, articulate the entity of source fax gateway and articulate and use out-of-band signalling to communicate between the entity of purpose fax gateway; In second kind of execution mode of the present invention, BSC and MSCe under the MS of described initiation facsimile service, this MS, articulate between the entity of source fax gateway and use out-of-band signalling to communicate, notify the entity that articulates the purpose fax gateway and send in the band facsimile signal by the facsimile equipment that self connects by the MS that initiates facsimile service.
Here, described source fax gateway is articulated on the entity that connects at first when initiating IP carrying section that facsimile service MS inserts the current speech service link, and described purpose fax gateway is articulated on the entity that connects at first when non-initiation facsimile service MS/PSTN terminal inserts the IP carrying section of current speech service link.
The inventive method can be applied to the CDMA/CDMA 2000/CDMA 1X system based on soft switch, is that example is described in detail two kinds of methods of the present invention with the CDMA soft switchcall server below.In cdma system framework based on Softswitch technology, calling out control realizes separating with exchange of media/carrying, MSC in the legacy circuit-switched system is divided into soft switching server (MSCe) and media gateway (MGW), be responsible for calling out control by MSCe, be responsible for media flow transmission by MGW, use IP to connect media stream between the MGW, and in system, realize the IP link bearer between BSC and the MGW based on the all-IP soft switch.Because, described source fax gateway and purpose fax gateway are separately positioned on the IP both link ends in the facsimile service link, therefore, facsimile service for the MS initiation, source fax gateway based on facsimile service link in the soft switchcall server of all-IP is BSC, and whether according to the opposite end is MS, and the entity that the purpose fax gateway of this facsimile service link is articulated is BSC or MGW.IWF described herein all refers to fax gateway, and the IWF that is articulated on the BSC is called B-IWF, and the IWF that is articulated on the MGW is called M-IWF.
Fig. 1 is that the cellular logic between MS and the PSTN terminal concerns schematic diagram in the CDMA all-IP soft switchcall server.As shown in Figure 1, the Signalling exchange relation between the dotted line presentation-entity among the figure, the Media Stream interactive relation between the solid line presentation-entity.Wherein, described MS communicates by point to point protocol (PPP) and the BSC under self, this BSC carries out Signalling exchange by the MSCe under A interface protocol 5.0 versions (IOS5.0) link and this MS, and the MGW interactive media that is connected with this MSCe by the IP link flows.Described PSTN terminal communicates by two wires analog circuit signal (2W) and the PSTN switch under self, the MSCe that this PSTN switch is connected with self realizes mutual by ISUP (ISUP) signaling, the MGW interactive media that is connected with this MSCe by time division multiplexing (TDM) link flows.MSCe passes through the MGW that H.248 protocol signaling control connects self, and, MSCe under the MS can be same or different entities with the MSCe that the PSTN switch connects, if the MSCe that the MSCe under the MS is connected with the PSTN switch is a different entities, then undertaken alternately by soft switch interoffice (SIP-T) signaling between each MSCe, then flow between the MGW that each MSCe connects by IP link interactive media based on initial session protocol.Here be depicted as cellular logic and concern schematic diagram, close in physical connection and fasten, the MGW transparent transmission that MSCe and information interaction between the external entity all are connected by self.
Among Fig. 1,, so can carry out facsimile service between this MS and this PSTN terminal because MS is mounted with fax (FAX) equipment, the PSTN terminal also possesses the FAX function.When carrying out the facsimile service media flow transmission, the two ends of IP in facsimile service link carrying section need be connected in series IWF equipment and finish conversion between circuit type facsimile signal and the packet-type facsimile signal, among Fig. 1, facsimile service link from MS to the PSTN terminal, because, the entity that MS and PSTN terminal are connected when inserting the IP carrying section of this service link at first is respectively BSC and MGW, therefore, the source fax gateway is articulated on the BSC, be expressed as B-IWF, the purpose fax gateway is articulated on the MGW, is expressed as M-IWF.
Fig. 2 is MS shown in Figure 1 first kind of execution mode of the present invention, one a preferred embodiment handling process schematic diagram when initiating facsimile service.In the present embodiment, each entity is divided to two systems, and wherein, system A comprises: B-IWF that BSC and MGW, this BSC are articulated under MS, this MS and the MSCe that controls this B-IWF; System B comprises: PSTN switch, MGW and the M-IWF that is articulated thereof under the PSTN terminal, this PSTN terminal, control the MSCe of this M-IWF.Here, the MSCe of described control B-IWF is the MSCe that connects this BSC; The MSCe of described control M-IWF is the MSCe that connects this MGW.In this paper accompanying drawing, MS/FAX represents to be mounted with the MS of FAX equipment, and PSTN terminal/FAX represents to possess the PSTN terminal of FAX function, all MS/FAX is called MS below simplifying title, and PSTN terminal/FAX is called the PSTN terminal.
As shown in Figure 2, set up after the speech business link between MS and the PSTN terminal, the concrete processing comprises:
The BSC of the condition code that step 201～step 202:MS sends predefined indication facsimile service under self, thus facsimile service initiated, and this BSC transmits the MSCe of this condition code under this MS again.Here, because B-IWF is articulated in the affiliated BSC of MS, therefore the MSCe under the described MS is the MSCe of control B-IWF.
Wherein, MS changes order by service attribute and sends described condition code, BSC changes the described condition code of request forwarding by the service attribute of A interface more then, and this service attribute changes request and can be carried by (Flash Withinfo) message of flashing of the information of carrying.Such as: be provided with described condition code for "
*88 ", the user at first dial condition code "
*88 ", press transmission (Send) key of MS then, so just sent a kind of service attribute and changed order to BSC, this order comprise described condition code "
*88 ", then BSC will comprise condition code "
*88 " Flash Withinfo message is sent to MSCe; Perhaps, the user at first press the Send key again the condition code of follow-up dial-out "
*88 "; when pressing the Send key, send service attribute like this and change order to BSC; subsequently BSC send comprise the spacing sign indicating number Flash Withinfo message to MSCe, this MSCe receive the condition code that will keep current business after this message and begin to receive the follow-up dial-out of MS "
*88 ".Here, described service attribute changes order, service attribute changes request and is specially which kind of message, and which kind of code described condition code specifically be set to, and the present invention does not limit.
Step 203～step 204: after the described MSCe of step 202 receives the condition code of described indication facsimile service, determine that the professional beginning of current speech switches to facsimile service, send invitation (INVITE) message that indication the opens IWF MSCe to the described system B; MSCe among the system B returns affirmation (OK) message again to the MSCe among the A of system.
Here, the MSCe of system B receives after the described INVITE, and the MGW among the reporting system B is opened M-IWF, and concrete the processing seen below continuous the description.
The MSCe of step 205: system A sends the service attribute update request to BSC, and this request indication BSC opens the B-IWF equipment that self articulates.Here, this service attribute update request can be the A interface signaling: bearer update request (Bear Update Req), it specifically is that the present invention does not limit for which kind of message.
Step 206～step 207: the described BSC of step 205 sends and opens the B-IWF that IWF order (Open IWF) articulates to self, return after this B-IWF successfully opens to open and confirm (Open Ack) message, thereby the source fax gateway is serially connected in the current business link to BSC.
Step 208～step 209:BSC and MS carry out bearer update to be consulted, as: between BSC and MS, set up RLP link etc., and after bearer update is consulted successfully, return bearer update and reply (Bear Update Rsp) and notify MSCe with negotiation result, as: whether set up RLP link etc.
Above-mentioned steps 205 is to the processing of step 209 for unlatching source fax gateway, and in the fax gateway of the source of unlatching, the entity among the system B is also at the purpose of opening fax gateway.Above-mentioned steps 203, step 204 can with step 205 to step 209 executed in parallel, and the MSCe of the B of system will continue to carry out the following stated step 205 after executing described step 204 ' to step 208 ', open and know MGW unlatching M-IWF.
Step 205 ': the MSCe of system B sends service attribute and updates request to the MGW that self connects, and this MGW of this request indication opens the purpose fax gateway M-IWF that self articulates.Here, described service attribute update request can be signaling H.248: the modification order (Modify) of IWF is opened in indication.
Here, above-mentioned service attribute changes order, service attribute changes request, service attribute update request etc. and all belongs to out-of-band signalling; The mode that IWF equipment is opened in described application INVITE, Bear Update Req message and the indication of Modify message is: the field that indicates whether to open IWF is set in INVITE, Bear Update Req message and Modify message.
Step 206 '～step 207 ': step 205 ' described MGW sends the M-IWF that Open IWF articulates to self, and return Open Ack after this M-IWF successfully opens and give MGW, thereby the purpose fax gateway is serially connected in the current business link.
The described MGW of step 208 ': step 207 ' returns H.248 signaling to MSCe: reply (Reply) message, notice MSCe purpose fax gateway is successfully opened.
After the source fax gateway at IP carrying section two ends and purpose fax gateway were all opened in the current business link, the facsimile service passage was set up, and realizes the switching of speech business to facsimile service.After this, MS and PSTN terminal facsimile signal alternately are with interior facsimile service to consult, negotiation comprises: the performance label of two ends facsimile equipment, operating state, the confirmation that can receive etc., concrete negotiations process is referring to the ITUT.30 agreement, this paper no longer describes in detail, after finishing the facsimile service negotiation, the content that both sides can carry out facsimile service transmits.
In the processing shown in Figure 2, step 205 is to the processing of step 209 for unlatching source fax gateway, with step 203, step 204, the described purpose of opening fax gateway of and step 205 ' to step 208 ' is handled relatively independent, can executed in parallel, but, can not guarantee carrying out synchronously of source fax gateway and purpose fax gateway unlatching, therefore also can with step 203 to step 204 as a kind of synchronization mechanism, that is: the MSCe of the B of system execution in step 205 ' and after sending the described message of step 204 in the message that receives step 203, and the MSCe of the A of system execution in step 205 after receiving the described message of step 204, like this, the unlatching of source fax gateway and purpose fax gateway can basic synchronization, makes the switching of facsimile service more meet user's business experience needs.
In the foregoing description, the soft switching server of Controlling Source fax gateway and purpose fax gateway all belongs to cdma network, therefore can communicate by the SIP-T signaling between each soft switching server, but when two communication networks that the speech business terminal attaching is different, the soft switching server that is used for controlling the fax gateway at speech business link IP carrying section two ends may belong to different communication networks, differ between the soft switching server like this and discern signaling surely mutually, therefore, the soft switching server of initiating facsimile service side can't notify the entity that articulate the purpose fax gateway to switch to facsimile service by the soft switching server of opposite end.
First kind of execution mode of the invention described above is applied to the situation of soft switching server compatibility.Second kind of execution mode of the present invention can be applied to the incompatible situation of soft switching server between the different communication network, and the facsimile signal notice articulates the entity purpose of opening fax gateway of purpose fax gateway in the band that the MS that initiates facsimile service side after the source fax gateway is opened directly sends by the facsimile equipment that self connects; Certainly, this second kind of execution mode also can be applied to the situation of soft switching server compatibility.
When adopting second kind of execution mode of the present invention, described processing and shown in Figure 2 basic identical, different is: since this method by the MS that initiates facsimile service by with in the facsimile signal notice articulate the entity purpose of opening fax gateway of purpose fax gateway, therefore step 203 and step 204 needn't be carried out, especially ' and step 208 ' notifies the MGW unlatching that articulates purpose fax gateway M-IWF more can't execution in step 203 and step 204 when the soft switching server of Controlling Source fax gateway and purpose fax gateway is incompatible, also just not by step 205; After having opened the source fax gateway, because MS can send the entity that facsimile signal to opposite end articulates the purpose fax gateway, therefore MS generates (CNG) signal etc. by facsimile signal in the band as pleasing sound, the MGW purpose of opening fax gateway of reporting system B, the MGW execution in step 206 ' of the B of system is to step 207 then ' come the purpose of opening fax gateway.
Use the difference that the inventive method is handled between the above MS and the PSTN terminal under detailed process process that facsimile service switches and various situation, because it is more to relate to situation, for ease of the overall process thought of explanation the inventive method, in conjunction with Fig. 3 the overall process process summary of the inventive method is described below here.
Fig. 3 uses the inventive method from speech business overall process flow schematic diagram when facsimile service switches between MS and the PSTN terminal.Among Fig. 3, facsimile signal flowed in solid line was represented to be with, and dotted line represents that out-of-band signalling flows to; MSCe1 is the affiliated MSCe of MS for the MSCe of control B-IWF, and MGW1 is the MGW that MSCe1 connected, and MSCe2 is the MSCe of control purpose fax gateway M-IWF, and MGW2 is the MGW that MSCe2 connected; Because the network annexation between MS and the PSTN terminal is described in detail in Fig. 1, so the annexation between each entity no longer describes among Fig. 3.Here, described MSCe1 can be same or different entities with MSCe2.
When using first kind of execution mode of the present invention, and described MSCe1 and MSCe2 be when being different entities, and as shown in Figure 3, processing procedure comprises:
Step 301:MS will indicate the facsimile service condition code to be sent to MSCe1 by out-of-band signalling.
Step 302:MSCe1 switches to facsimile service by out-of-band signalling notice MSCe2 again.
Step 303～step 304:MSCe1 and MSCe2 notify BSC and MGW2 to open source fax gateway B-IWF and the purpose fax gateway M-IWF that articulates separately respectively by out-of-band signalling separately, thereby set up the facsimile service passage.
Here, execute directly execution in step 304 of described step 302, step 302 also can with step 303 executed in parallel, so the described processing of step 303, with step 302 and the described processing of step 304 can executed in parallel.In addition, if make the unlatching of source fax gateway and purpose fax gateway synchronous, that is: make the processing basic synchronization of step 303 and step 304, then can be with described step 302 as a kind of synchronous signaling, MSCe2 is by step 302 ' signaling the signaling of step 302 is replied, MSCe1 is receiving step 302 ' execution in step 303 again after the described signaling, and MSCe2 execution in step 304 again after forwarding step 302 ' described signaling.
If described MSCe1 and MSCe2 are same entity, then the Signalling exchange between MSCe1 and the MSCe2 need not to carry out, and promptly need not execution in step 302 and step 302 ', other processing is same as described above.
When using second kind of execution mode of the present invention, as shown in Figure 3, processing procedure comprises:
Step 301:MS will indicate the facsimile service condition code to be sent to MSCe1 by out-of-band signalling, execution in step 303.
Step 303:MSCe1 opens source fax gateway B-IWF by the BSC that the out-of-band signalling notice articulates the source fax gateway, and BSC opens B-IWF, execution in step 304 ' again.
Step 304 ': the FAX that MS connects by self sends facsimile signal in the band, and to MGW2, MGW2 receives purpose of opening fax gateway M-IWF after the facsimile signal, thereby sets up the facsimile service passage by facsimile signal in BSC, B-IWF, the MGW1 conveyer belt successively.
Wherein, the transport process of facsimile signal is divided into two sections in the above-mentioned band: the transmission of the transmission of circuit type facsimile signal and Fax over IP signal.The transmission of described circuit type facsimile signal starts from the FAX that MS connects, and ends at B-IWF, and described Fax over IP signal starts from B-IWF, and ends at MGW2.Described B-IWF receives from the ITU of FAX and T.30 converts thereof into IFP protocol of I P facsimile signal after the circuit type facsimile signal of agreement, this Fax over IP signal transmits on the IP link between BSC, MGW1 and the MGW2 then, and MGW2 opens M-IWF after recognizing IFP protocol of I P facsimile signal.How to recognize the Fax over IP signal about MGW2 and belong to known technology, be not described further here.
Below in conjunction with Fig. 4 to Fig. 6 the processing of using the inventive method between the MS is described in detail.
Fig. 4 is that the cellular logic between MS and the MS concerns schematic diagram in the CDMA all-IP soft switchcall server.With shown in Figure 1 similar, the Signalling exchange relation between the dotted line presentation-entity, the Media Stream interactive relation between the solid line presentation-entity.Wherein, described MS by PPP connect with separately under BSC communicate, each BSC carries out Signalling exchange by IOS5.0 link and each self-corresponding MSCe, the MGW interactive media that is connected with each self-corresponding MSCe by the IP link flows.Each MSCe passes through the MGW that H.248 protocol signaling control connects separately, and, MSCe under each MS can be same or different entities, if the MSCe under each MS is a different entities, then undertaken alternately by the SIP-T signaling between its affiliated separately MSCe, then flow between the MGW that each MSCe connects by IP link interactive media.Described MS all is mounted with FAX, so can carry out facsimile service between this MS.In the facsimile service link between MS, the source fax gateway is articulated in initiation facsimile service MS respectively with the purpose fax gateway and inserts on the entity that is connected at first when IP carries section in this service link with non-initiation facsimile service MS, this entity is exactly the BSC under each MS, therefore, all be expressed as B-IWF among source fax gateway and the purpose fax gateway figure, and the MSCe under each MS also is exactly the MSCe of Controlling Source fax gateway B-IWF and purpose fax gateway B-IWF respectively.
Fig. 5 is MS shown in Figure 4 first kind of execution mode of the present invention, one a preferred embodiment handling process schematic diagram when initiating facsimile service.In the present embodiment, each entity is divided to two systems, and wherein, system A comprises: the B-IWF that MSCe and MGW and this BSC are articulated under BSC, this MS under MS, this MS; System B comprises: the B-IWF that MSCe and MGW and this BSC are articulated under BSC, this another MS under another MS, this another MS.MSCe under the MS of system A and the B of system is sent to condition code separately by affiliated separately BSC respectively notifies the entity unlatching fax gateway separately that articulates the entity of source fax gateway or articulate the purpose fax gateway by affiliated separately MSCe again.As shown in Figure 5, execution in step 501, step 502, step 505 be to step 509 between BSC under the MS of system A and self and the MSCe, execution in step 501 ', step 502 between the MS of system B and self affiliated BSC and the MSCe ', step 505 ' to step 509 '.
The following stated step 501, step 502, step 505 be to step 509, and identical to step 209 with the described step 201 of Fig. 2, step 202, step 205, the concrete processing comprises:
The BSC of the condition code that the MS of step 501～step 502: system A sends the indication facsimile service that sets in advance under self, thus initiate facsimile service, this BSC again by comprise condition code "
*88 " MSCe of this condition code of Flash Withinfo forwards under this MS, execution in step 505.
The MSCe of step 505: system A sends Bear Update Req to BSC, and this request indication BSC opens the B-IWF equipment that self articulates.
Step 506～step 507: the described BSC of step 405 sends the B-IWF that Open IWF articulates to self, returns Open Ack message after this B-IWF successfully opens and gives BSC, thereby the purpose fax gateway is serially connected in the current business link.
Step 508～step 509:BSC and MS carry out bearer update to be consulted, and returns Bear Update Rsp and notify MSCe with negotiation result after bearer update is consulted successfully.
Described step 501 ' with step 502 ', identical, described step 505 ' with step 509 ', identical to step 509 with step 505 with step 501 and step 502, the concrete processing comprises:
The BSC of the condition code that the MS of step 501 '～step 502 ': system B sends the indication facsimile service that sets in advance under self, thereby initiation facsimile service, this BSC is the MSCe of this condition code of Flash Withinfo forwards by comprising condition code " * 88 " under this MS again, execution in step 505 '.
Step 505 ': the MSCe of system B is to step 502 ' described BSC transmission Bear Update Req, this BSC of this request indication opens the B-IWF equipment that self articulates.
Step 506 '～step 507 ': step 505 ' described BSC sends the B-IWF that Open IWF articulates to self, and return Open Ack message after this B-IWF successfully opens and give BSC, thereby the source fax gateway is serially connected in the current business link.
Step 508 '～step 509 ': this BSC and MS carry out bearer update to be consulted, and returns Bear Update Rsp and notify MSCe with negotiation result after bearer update is consulted successfully.After the source fax gateway at IP carrying section two ends and purpose fax gateway were all opened in the current business link, the facsimile service passage was set up, and finishes the switching of facsimile service.After this, the MS of A of system and the B of system in facsimile signal is with alternately facsimile service consult.
In the above-mentioned processing, the fax gateway that system A and the separate unlatching of the B of system articulate separately, if make the unlatching basic synchronization of source fax gateway and purpose fax gateway, and then described similar with Fig. 2, between step 502 and step 505, increase step 503 and step 504.Being treated to of described step 503～step 504: after the described MSCe of step 502 receives the condition code of described indication facsimile service, determine that the current speech business begins to switch to facsimile service, send INVITE that indication the opens IWF MSCe to the described system B, thereby the notice opposite end prepares to switch to facsimile service; MSCe among the system B returns OK message again to the MSCe among the A of system.And, when the MSCe of the B of system had both received step 502 ' described condition code, also receiving after the described message of step 503 just can execution in step 504, and while execution in step 505 ', the MSCe of system A receives the described message of step 504 and just understands execution in step 505, thereby A of system and the B of system can distinguish substantially and start source fax gateway and purpose fax gateway synchronously.Here, present embodiment is set: the MS of system A initiates facsimile service, and the then MSCe Controlling Source fax gateway of the A of system, and this MSCe at first receives condition code, so the message of step 503 is sent by this MSCe; The MSCe that at first receives condition code among the present invention can be the MSCe of Controlling Source fax gateway, also can be the MSCe of control purpose fax gateway, but not influence validity of the present invention.
Certainly, the MS of A of system and the B of system is when facsimile service switches among Fig. 5, also can be by the MS that initiates facsimile service side, send the MSCe of condition code under self, open fax gateway by this MSCe by the entity that MSCe notice under the opposite end articulates the purpose fax gateway again, here setting the MS that initiates facsimile service side is the MS of the A of system, like this, and step 501 ' and step 502 ' just needn't carry out.At this moment, if requiring source fax gateway and purpose fax gateway opens synchronously, after then the MSCe of the B of system receives the described message of step 503, execution in step 505 ' in forwarding step 504 described message, and the MSCe of the A of system execution in step 505 after receiving the described message of step 504; If do not require synchronous unlatching source fax gateway and purpose fax gateway, the MSCe of the A of system execution in step 505 in execution in step 503 then, the MSCe of system B is execution in step 505 ' after receiving the described message of step 503.Here, about above-mentioned which kind of implementation of concrete employing, determine that according to facsimile service demand and soft switchcall server realization situation the present invention does not limit, but does not influence validity of the present invention.
In addition, when adopting second kind of execution mode of the present invention, described processing and shown in Figure 5 basic identical, different is: because the facsimile signal notice articulates the entity purpose of opening fax gateway of purpose fax gateway in the band that this method is sent by the FAX that self connects by the MS that initiates facsimile service, therefore step 503 and step 504 needn't be carried out, ' and step 509 ' notifies the unlatching that articulates purpose fax gateway B-IWF more can't execution in step 503 and step 504 when especially the soft switching server under two terminals is incompatible, also just not by step 505; After having opened the source fax gateway, because MS can send the entity that facsimile signal to opposite end articulates the purpose fax gateway, therefore the MS of the A of system can be by the BSC purpose of opening fax gateway of facsimile signal reporting system B in the band, and the BSC execution in step 506 ' of the B of system is to step 508 then ' come the purpose of opening fax gateway.
Fig. 6 uses the inventive method from speech business overall process flow schematic diagram when facsimile service switches between the MS.Among Fig. 6, facsimile signal flowed in solid line was represented to be with, and dotted line represents that out-of-band signalling flows to; BSC under MS1 and the MS2 is respectively BSC1 and BSC2; MSCe1 is the MSCe under the MS1, and MGW1 is the MGW that MSCe1 connected, and MSCe2 is the MSCe under the MS2, and MGW2 is the MGW that MSCe2 connected; Because the network annexation is described in detail in Fig. 4 between MS and the MS, so the annexation between each entity no longer describes among Fig. 6.Here, described MSCe1 can be same or different entities with MSCe2.
When using first kind of execution mode of the present invention, and described MSCe1 and MSCe2 be when being different entities, and as shown in Figure 6, processing procedure comprises:
Step 601:MS1 will indicate the facsimile service condition code to be sent to MSCe1 by out-of-band signalling.
Step 602:MSCe1 switches to facsimile service by out-of-band signalling notice MSCe2 again.
The BSC2 that step 603～step 604:MSCe1 and MSCe2 notify the BSC1 that articulates the source fax gateway respectively by out-of-band signalling separately and articulate the purpose fax gateway opens the B-IWF articulate separately, thereby sets up the facsimile service passage.
Here, described step 602 and step 604 order is carried out, the described processing of step 603, with step 602 and the described processing of step 604 can executed in parallel.In addition, if make the unlatching of source fax gateway and purpose fax gateway synchronous, that is: make the processing basic synchronization of step 603 and step 604, then can be with described step 602 as a kind of synchronous signaling, MSCe2 is by step 602 ' signaling the signaling of step 602 is replied, MSCe1 is receiving step 602 ' execution in step 603 again after the described signaling, and MSCe2 execution in step 604 again after forwarding step 602 ' described signaling.
Because MS1 and MS2 all possess the ability of condition code to MSCe that send, therefore also can send condition code respectively to affiliated separately MSCe by MS1 and MS2, processing procedure is:
MS1, MSCe1 and BSC1 execution in step 601 and step 603; Concurrently, MS2, MSCe2 and BSC2 execution in step 601 ' and step 604.Wherein, described step 601 ' be: MS2 will indicate the facsimile service condition code to be sent to MSCe2 by out-of-band signalling.Other step shown in Figure 6 need not to carry out.
Equally, when MS1 and MS2 send condition code to MSCe1 and MSCe2 respectively, also may need synchronous execution in step 603 of MSCe1 and MSCe2 and step 604; At this moment, then need to carry out described step 602 and step 602 '.Wherein, the MSCe that at first receives condition code is with execution in step 602, and setting this MSCe here is MSCe1; Step 602 ' be to replying that the signaling of step 602 is carried out; MSCe2 is receiving step 601 ' condition code and the signaling of step 602 after, by step 602 ' signaling reply and then execution in step 604; MSCe1 is receiving step 602 ' signaling after execution in step 603 again; Thereby can make BSC1 and BSC2 open B-IWF synchronously.
If described MSCe1 and MSCe2 are same entity, then the Signalling exchange between MSCe1 and the MSCe2 need not to carry out, and promptly need not execution in step 602 and step 602 ', other processing is same as described above.
When using second kind of execution mode of the present invention, as shown in Figure 6, processing procedure comprises:
Step 601:MS1 will indicate the facsimile service condition code to be sent to MSCe1 by out-of-band signalling, execution in step 603.
Step 603:MSCe1 opens source fax gateway B-IWF by the BSC that the out-of-band signalling notice articulates the source fax gateway, and BSC opens B-IWF, execution in step 604 ' again.
Step 604 ': MS1 sends facsimile signal in the band by the FAX that self connects, by facsimile signal in B-IWF, MGW1 that BSC1, BSC1 articulated, the MGW2 conveyer belt successively to BSC2, BSC2 receives purpose of opening fax gateway B-IWF after the facsimile signal, thereby sets up the facsimile service passage.
Wherein, step 604 ' transport process of facsimile signal is divided into two sections in the described band: the transmission of the transmission of circuit type facsimile signal and Fax over IP signal.The transmission of described circuit type facsimile signal starts from the FAX that MS1 connects, and ends at the B-IWF that BSC1 articulates, and described Fax over IP signal starts from the B-IWF that BSC1 articulates, and ends at BSC2.The B-IWF that described BSC2 articulates receives from the ITU of FAX and T.30 converts thereof into IFP protocol of I P facsimile signal after the circuit type facsimile signal of agreement, this Fax over IP signal transmits on the IP link between BSC1, MGW1, MGW2 and the BSC2 then, and BSC2 opens the B-IWF that self articulates after recognizing IFP protocol of I P facsimile signal.How to recognize the Fax over IP signal about BSC2 and belong to known technology, be not described further here.
The described processing that is applied to the all-IP soft switchcall server for the inventive method of above Fig. 1 to Fig. 6, when two kinds of methods of the present invention are applied to the soft switchcall server of non-all-IP, described source fax gateway and purpose fax gateway all should be articulated on the affiliated MGW of MS, are expressed as M-IWF.Therefore, between MS and the PSTN terminal from speech business to facsimile service switching processing and shown in Figure 2 basic identical, the processing that different is: above-mentioned steps 205 becomes similar step 205 to the processing of step 209 is corresponding ' to step 208 ', only the entity of Chu Liing becomes MSCe, MGW and the M-IWF of the A of system from MSCe, MGW and the M-IWF of the B of system; Equally, the process of switching to facsimile service from speech business between the MS and shown in Figure 5 basic identical, different is: above-mentioned steps 505 is to step 509 and step 505 ' to step 509 ', and the homogeneous phase strain is a step 205 ' to step 208 ' described processing.
In addition, in the speech business link, usually use echo canceller function (EC) elimination echo to disturb on the Media Stream switching equipment and guarantee speech quality, perhaps use the encoding and decoding speech mechanism of remote speech codec functions (RTO), and fax service data will produce data degradation after handling through EC and/or RTO, cause the distortions such as image, literal of fax.Therefore, be to guarantee the facsimile service quality, the Media Stream switching equipment is learning that the current speech business also should close presently used EC and/or RTO when facsimile service switches.Described Media Stream switching equipment comprises: the various switches on MGW, the service link such as PSTN switch, Ethernet switch etc.
Wherein, described MGW can be when receiving the unlatching fax gateway order that MSCe sends or when receiving facsimile signal, close self employed EC and/or RTO, described switch can be closed self employed EC and/or RTO when receiving facsimile signal.Here, can receive facsimile signal when facsimile service was consulted in MGW and switch were with between terminal, when using second kind of execution mode of the present invention, also can the MS that initiates facsimile service by with in facsimile signal receive facsimile signal when notifying the entity that articulates the purpose fax gateway.
In sum, use the inventive method and can utilize the out-of-band signalling between each entity in the current speech service link, the entity that notice articulates fax gateway is serially connected in fax gateway in the service link, thereby switch to facsimile service, and need not to revise standard signaling interface, change less to existing network; In addition, second kind of execution mode of the present invention also considered the compatibling problem between the soft switch of heterogeneous networks, all can successful switch when making the terminal of CDMA/CDMA 2000/CDMA 1X network and various its network termination carry out voice call to facsimile service.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.All any modifications of being done within the spirit and principles in the present invention, be equal to replacement, improvement etc., all be included in protection scope of the present invention.
Claims (14)
1, a kind of method that realizes speech business to the facsimile service switching is characterized in that this method comprises:
When the current mobile terminal MS of having set up the speech business link is initiated facsimile service, the condition code of predefined indication facsimile service is sent to soft switching server MSCe by base station controller BSC;
Switched to facsimile service by the entity that articulates the source fax gateway in the MSCe notice current speech service link, this entity that articulates the source fax gateway is opened the source fax gateway;
The entity that is articulated the purpose fax gateway by MSCe or described MS notice switches to facsimile service, and this articulates the entity purpose of opening fax gateway of purpose fax gateway, sets up the facsimile service passage.
2, method according to claim 1 is characterized in that, the terminal of non-initiation facsimile service side is a public switched telephone network (PSTN) PSTN terminal in the described current speech service link;
The entity that the described entity that articulates the source fax gateway connects when carrying section for the IP that initiates facsimile service MS access current speech service link at first, this entity is for initiating facsimile service MS affiliated BSC or media gateway MGW; The described entity that articulates the purpose fax gateway is that described PSTN terminal inserts the MGW that connects at first when described IP carries section.
3, method according to claim 1 is characterized in that, the terminal of non-initiation facsimile service side is MS in the described current speech service link;
The entity that the IP of the MS access current speech service link that the described entity that articulates the source fax gateway is the initiation facsimile service connects when carrying section at first, this entity is affiliated BSC or MGW of this MS; The entity that the IP of the MS access current speech service link that the described entity that articulates the purpose fax gateway is non-initiation facsimile service connects when carrying section at first, this entity is BSC or the MGW under this MS.
4, method according to claim 3, it is characterized in that, when notifying the entity that articulates the purpose fax gateway when facsimile service switches by MSCe, this method further comprises: the MS of non-initiation facsimile service sends described condition code to MSCe by the BSC under self;
The MSCe that described notice articulates source fax gateway entity is: the MSCe that receives condition code from the MS that initiates facsimile service; The MSCe that described notice articulates purpose fax gateway entity is: the MSCe that receives condition code from the MS of non-initiation facsimile service;
Described MSCe notice articulates source fax gateway entity:
The MSCe that described notice articulates source fax gateway entity notifies the entity that articulates the source fax gateway to switch to facsimile service after receiving condition code; The MSCe that described notice articulates purpose fax gateway entity notifies the entity that articulates the purpose fax gateway to switch to facsimile service after receiving condition code.
5, method according to claim 3, it is characterized in that, when notifying the entity that articulates the purpose fax gateway when facsimile service switches by MSCe, this method further comprises: the MS of non-initiation facsimile service sends described condition code to MSCe by the BSC under self;
The MSCe that described notice articulates source fax gateway entity is: the MSCe that receives condition code from the MS that initiates facsimile service; The MSCe that described notice articulates purpose fax gateway entity is: the MSCe that receives condition code from the MS of non-initiation facsimile service;
Described notice articulates the MSCe of source fax gateway entity and notifies the MSCe that articulates purpose fax gateway entity is different entities, and described MSCe notice articulates source fax gateway entity and with the method that articulates purpose fax gateway entity is:
The MSCe notice opposite end MSCe that at first receives condition code switches to facsimile service, and is receiving the entity that the back notice articulates the fax gateway of self controlling of replying of this opposite end MSCe; This opposite end MSCe learns that after facsimile service switched and receives condition code, notice articulated the entity of the fax gateway of self controlling;
The described MSCe that at first receives condition code articulates source fax gateway entity for notice or articulates the MSCe of purpose fax gateway entity; Corresponding, described opposite end MSCe articulates purpose fax gateway entity for notice or articulates the MSCe of source fax gateway entity.
6, according to each described method of claim 1 to 3, it is characterized in that, when the entity that is articulated the purpose fax gateway by MSCe notice switches to facsimile service, and notice is when articulating the MSCe of source fax gateway entity and MSCe that notice articulates purpose fax gateway entity and being different entities
The MSCe that described notice articulates source fax gateway entity is: the MSCe that receives condition code from the MS that initiates facsimile service;
Described MSCe notice articulates source fax gateway entity:
The MSCe that described notice articulates source fax gateway entity receives after the condition code, notifies described notice MSCe that articulates purpose fax gateway entity and the entity that articulates the source fax gateway to switch to facsimile service; The MSCe that this notice articulates purpose fax gateway entity learns that after facsimile service switched, the entity that notice articulates the purpose fax gateway switched to facsimile service.
7, according to each described method of claim 1 to 3, it is characterized in that, when the entity that is articulated the purpose fax gateway by MSCe notice switches to facsimile service, and notice is when articulating the MSCe of source fax gateway entity and MSCe that notice articulates purpose fax gateway entity and being different entities
The MSCe that described notice articulates source fax gateway entity is: the MSCe that receives condition code from the MS that initiates facsimile service;
Described MSCe notice articulates source fax gateway entity:
The MSCe that described notice articulates source fax gateway entity receives after the condition code, the MSCe that notifies described notice to articulate purpose fax gateway entity switches to facsimile service, and receive this notice articulate purpose fax gateway entity MSCe reply the entity that back notice articulates the source fax gateway; The MSCe that this notice articulates purpose fax gateway entity learns after facsimile service switches, and articulates the MSCe echo reply of source fax gateway entity to described notice, and notifies the entity that articulates the purpose fax gateway to switch to facsimile service.
According to each described method of claim 1 to 4, it is characterized in that 8, described notice articulates the MSCe of source fax gateway entity and notifies the MSCe that articulates purpose fax gateway entity is same entity.
9, according to each described method of claim 1 to 3, it is characterized in that, when notifying the entity that articulates the purpose fax gateway when facsimile service switches by described MS, the MSCe that described notice articulates source fax gateway entity is: the MSCe that receives condition code from the MS that initiates facsimile service;
After the entity that articulates the source fax gateway is opened the source fax gateway, articulate the entity purpose of opening fax gateway of purpose fax gateway again by this MS notice.
10, method according to claim 9 is characterized in that, facsimile signal is notified the entity that articulates the purpose fax gateway in the band that the facsimile equipment that described MS connects by self sends.
11, according to each described method of claim 1 to 5, it is characterized in that, described terminal, BSC, MSCe, articulate the entity of source fax gateway and articulate and use out-of-band signalling to communicate between the entity of purpose fax gateway.
12, method according to claim 11 is characterized in that, when the MS of described initiation facsimile service sent condition code to MSCe by BSC, employed out-of-band signalling was that service attribute changes request.
13, method according to claim 11 is characterized in that, when described MSCe notice articulated the entity of source fax gateway and/or articulates the entity of purpose fax gateway, employed out-of-band signalling was the service attribute update request.
14, according to each described method of claim 1 to 5, it is characterized in that, Media Stream switching equipment in the current speech service link is learnt to facsimile service and is switched, and when self having used echo canceller function EC and/or remote speech codec functions RTO, this method further comprises: the Media Stream switching equipment in the described current speech service link is closed self employed EC and/or RTO.
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| CNB2005100066283A CN100488224C (en) | 2005-01-07 | 2005-01-07 | Method for realizing voice service switching to fax service |
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| CNB2005100066283A CN100488224C (en) | 2005-01-07 | 2005-01-07 | Method for realizing voice service switching to fax service |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2008046346A1 (en) * | 2006-10-16 | 2008-04-24 | Huawei Technologies Co., Ltd. | Service switching method, device and system |
| WO2008055437A1 (en) * | 2006-11-08 | 2008-05-15 | Huawei Technologies Co., Ltd. | Method, device and system for providing inter working function service in mobile communication system |
| WO2008071034A1 (en) * | 2006-12-13 | 2008-06-19 | Zte Corporation | Method for transforming service option into circuit data |
| WO2009015576A1 (en) * | 2007-08-01 | 2009-02-05 | Huawei Technologies Co., Ltd. | Method, system and device for changing voice service to fax service |
| CN101166300B (en) * | 2006-10-19 | 2010-05-19 | 华为技术有限公司 | Service switching method and system |
| CN101217799B (en) * | 2008-01-17 | 2011-10-26 | 中兴通讯股份有限公司 | A method and base station compatible with abnormal terminals |
| WO2012075751A1 (en) * | 2010-12-10 | 2012-06-14 | 中兴通讯股份有限公司 | System and method for realizing cross-protocol voice-to-fax |
| CN101262706B (en) * | 2008-04-21 | 2012-07-18 | 中兴通讯股份有限公司 | Realization method for voice switch to fax service |
| CN101330669B (en) * | 2008-07-24 | 2013-06-05 | 中兴通讯股份有限公司 | Method and system for implementing transfer of voice to fax business based on CDMA2000 mobile communication system |
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2005
- 2005-01-07 CN CNB2005100066283A patent/CN100488224C/en not_active Expired - Fee Related
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| WO2008046346A1 (en) * | 2006-10-16 | 2008-04-24 | Huawei Technologies Co., Ltd. | Service switching method, device and system |
| CN101166302B (en) * | 2006-10-16 | 2010-05-19 | 华为技术有限公司 | Service switching method and system |
| CN101166300B (en) * | 2006-10-19 | 2010-05-19 | 华为技术有限公司 | Service switching method and system |
| WO2008055437A1 (en) * | 2006-11-08 | 2008-05-15 | Huawei Technologies Co., Ltd. | Method, device and system for providing inter working function service in mobile communication system |
| CN1980472B (en) * | 2006-11-08 | 2010-05-12 | 华为技术有限公司 | Method for mobile communication system to provide network inter-communication function business, apparatus and system |
| CN101558670B (en) * | 2006-12-13 | 2011-07-06 | 中兴通讯股份有限公司 | Method for transforming service option into circuit data |
| WO2008071034A1 (en) * | 2006-12-13 | 2008-06-19 | Zte Corporation | Method for transforming service option into circuit data |
| WO2009015576A1 (en) * | 2007-08-01 | 2009-02-05 | Huawei Technologies Co., Ltd. | Method, system and device for changing voice service to fax service |
| CN101132461B (en) * | 2007-08-01 | 2010-09-29 | 华为技术有限公司 | Method, system and equipment for implementing changing from voice business to fax business |
| CN101217799B (en) * | 2008-01-17 | 2011-10-26 | 中兴通讯股份有限公司 | A method and base station compatible with abnormal terminals |
| CN101262706B (en) * | 2008-04-21 | 2012-07-18 | 中兴通讯股份有限公司 | Realization method for voice switch to fax service |
| CN101330669B (en) * | 2008-07-24 | 2013-06-05 | 中兴通讯股份有限公司 | Method and system for implementing transfer of voice to fax business based on CDMA2000 mobile communication system |
| WO2012075751A1 (en) * | 2010-12-10 | 2012-06-14 | 中兴通讯股份有限公司 | System and method for realizing cross-protocol voice-to-fax |
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