CN1801873A

CN1801873A - Fax service data transmission method

Info

Publication number: CN1801873A
Application number: CN 200510006627
Authority: CN
Inventors: 王备
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2005-01-07
Filing date: 2005-01-07
Publication date: 2006-07-12
Anticipated expiration: 2025-01-07
Also published as: CN100366040C

Abstract

Present invention discloses transmission method for facsimile service data, which sets respectively source facsimile gateway and target facsimile gateway. Said method includes A, facsimile set in transmitting end transmitting circuit type facsimile signal to source facsimile gateway which converts it into internet digital facsimile signal and transmitting it to target facsimile gateway through soft switching system IP link, B, said target facsimile gateway converting received internet digital facsimile signal to circuit facsimile signal and transmitting to receiving terminal facsimile set. Said invention can realize facsimile service facsimile service data transmission in soft switching system.

Description

A kind of transmission method of fax service data

Technical field

The present invention relates to facsimile service realization technology, particularly based on the transmission method of fax service data in the mobile communications network of soft switch.

Background technology

At present, sending a fax by portable terminal is application circuit type data service (CSD) more widely.In the legacy circuit-switched system, the T.30 facsimile protocol that International Telecommunications Union formulates is followed in the transmission of fax service data.The mutual conversion that fax gateway is used to carry out the digital signal and the analog signal of facsimile service usually also will be set in the system.Such as: in code division multiple access (CDMA) system, fax gateway can be articulated in base station controller (BSC) or mobile switching centre (MSC).Here, described fax gateway realizes that by data interchange unit (IWF) IWF described herein all refers to fax gateway usually.

But in the mobile communication system based on Softswitch technology, the transfer of data of core net realizes IPization, therefore, if soft switchcall server will be realized facsimile service, fax service data in core net by the IP link bearer.But, if facsimile service continues to continue to use original T.30 agreement in IP carrying section, will problems such as fax weak effect, mortality height appear owing to the difference of circuit switching and packet switching, therefore should adopt the T.38 facsimile protocol that is fit to the IP transmission accordingly.Wherein, Wideband Code Division Multiple Access (WCDMA) (WCDMA) soft switchcall server has defined a cover facsimile service and has realized standard.According to this standard, will at mobile terminal side and network side fax gateway be set respectively, by fax gateway facsimile signal is carried out data transaction, it can be transmitted on the IP of soft switch link.But, because the fax gateway of end side is arranged between portable terminal and the facsimile machine, the user need change original portable terminal or facsimile machine or increase independently fax gateway equipment, the user can't use original communication apparatus to send fax like this, that is: the realization of facsimile service can't compatible original subscriber equipment.And, also be difficult to all realize compatible between the mobile terminal side fax gateway that network side fax gateway and each terminal producer produce.

In addition,, also the data transmission procedure of facsimile service is not stipulated at present, being comprised: the set position of IWF, the protocol stack or the like of fax business data transmission on IWF for CDMA/CDMA 2000/CDMA 1X soft switchcall server.Though WCDMA has had complete definition to the facsimile service standard, WCDMA is different with the realization mechanism of CDMA serial system, and it is far from each other that the protocol stack of each entity is formed structure in the system.Therefore, if the incompatibility of equipment when not considering that the WCDMA soft switchcall server is realized facsimile service, even CDMA/CDMA 2000/CDMA 1X soft switchcall server would adopt the treatment mechanism of WCDMA soft switch also can't realize facsimile service.

In sum, existing CDMA/CDMA 2000/CDMA 1X soft switchcall server based on the IP technology also neither one reasonable mechanism comes the transmitting facsimile business datum, still can't realize facsimile service at present.

Summary of the invention

In view of this, main purpose of the present invention is to provide a kind of transmission method of fax service data, can realize the transmission of fax service data in CDMA/CDMA 2000/CDMA 1X soft switchcall server.

For achieving the above object, technical scheme of the present invention is achieved in that

The invention discloses a kind of transmission method of fax service data, source fax gateway and purpose fax gateway are set respectively at the IP of soft switchcall server both link ends; This method comprises:

A. transmitting terminal facsimile machine transtation mission circuit type facsimile signal is to the source fax gateway, the source fax gateway converts the circuit type facsimile signal that receives to internet digital fax signal, and by the IP link of soft switchcall server internet digital fax signal is sent to the purpose fax gateway;

B. described purpose fax gateway becomes the circuit type facsimile signal with the internet digital fax conversion of signals that receives, and the circuit type facsimile signal is sent to the receiving terminal facsimile machine.

Wherein, described transmitting terminal is connected MS and Public Switched Telephone Network terminal respectively with the receiving terminal facsimile machine; The entity that the described entity that articulates the source fax gateway connects during described IP link at first for this MS inserts, this entity is BSC or the media gateway (MGW) under this MS; The MGW that the described entity that articulates the purpose fax gateway connects during described IP link at first for this PSTN terminal inserts; In the steps A, the circuit type facsimile signal that described source fax gateway receives is the digital signal of circuit type fax; Among the step B, the circuit type facsimile signal that described purpose fax gateway converts to is the analog signal of circuit type fax.

Among the step B, described purpose fax gateway becomes the method for the analog signal of circuit type fax to comprise the internet digital fax conversion of signals that receives:

B11. decompose Internet Facsimile Protocol (IFP) packet that the purpose fax gateway is uploaded from the MGW that self articulates and obtain internet digital fax signal;

B12. the described internet of step B11 digital fax conversion of signals is become the T.30/T.4 discernible circuit type fax of protocol layer digital signal, by agreement T.30/T.4 this circuit type fax Digital Signal Processing is become circuit type fax analog signal again, the analog signal transmission channel that obtains this MGW is prepared the circuit type fax analog signal handled.

Wherein, described transmitting terminal is connected PSTN terminal and MS respectively with the receiving terminal facsimile machine; The MGW that the described entity that articulates the source fax gateway connects during described IP link at first for this PSTN terminal inserts; The entity that the described entity that articulates the purpose fax gateway connects during described IP link at first for this MS inserts, this entity is BSC or the MGW under the described MS; In the steps A, the circuit type facsimile signal that described source fax gateway receives is the analog signal of circuit type fax; Among the step B, the circuit type facsimile signal that described purpose fax gateway converts to is the digital signal of circuit type fax.

In the steps A, described source fax gateway comprises the method for the special netting index word of the analog signal conversion origin cause of formation facsimile signal that the circuit type that receives is faxed:

A11. the source fax gateway is pressed T.30/T.4 agreement, and the circuit type fax analog signal conversion that the MGW that self is articulated uploads is a digital signal, is the discernible internet of IFP layer digital fax signal again with this Digital Signal Processing;

A12. by the IFP agreement steps A 11 described internet digital fax signals are packaged into the IFP packet, the IP layer that obtains this MGW is prepared the internet digital fax signal of processing.

Wherein, described transmitting terminal is connected MS respectively with the receiving terminal facsimile machine; The entity that the MS that the described entity that articulates the source fax gateway connects for the transmitting terminal facsimile machine connects when inserting described IP link at first, this entity be affiliated BSC or MGW of this MS; The entity that the MS that the described entity that articulates the purpose fax gateway connects for the receiving terminal facsimile machine connects when inserting described IP link at first, this entity be affiliated BSC or MGW of this MS; In the steps A, the circuit type facsimile signal that described source fax gateway receives is the digital signal of circuit type fax; Among the step B, the circuit type facsimile signal that described purpose fax gateway converts to is the digital signal of circuit type fax.

When wherein, the described entity that articulates the source fax gateway is BSC under the MS; In the steps A, the method that the digital signal that described source fax gateway is faxed the circuit type that receives converts internet digital fax signal to comprises:

A21. radio link protocol (RLP) the layer circuit type fax digital signal uploaded of source fax gateway BSC that self the is articulated data payload of separating that carries out link layer, IP layer is successively handled, and obtains the digital signal of circuit type fax;

A22. the digital signal with the described circuit types fax of steps A 21 converts the T.30/T.4 discernible circuit type fax of protocol layer digital signal to, again with this T.30/T.4 the discernible circuit type fax of protocol layer digital signal convert the discernible internet of IFP layer digital fax signal to;

A23. by the IFP agreement steps A 22 described internet digital fax signals are packaged into the IFP packet, the IP layer that obtains this BSC is prepared the internet digital fax signal of processing.

When wherein, the described entity that articulates the source fax gateway is MGW under the MS; In the steps A, the method that the digital signal that described source fax gateway is faxed the circuit type that receives converts internet digital fax signal to comprises:

A31. the IP layer circuit type fax digital signal uploaded of source fax gateway MGW that self is articulated is converted to the T.30/T.4 discernible circuit type fax of protocol layer digital signal, and the digital signal with this circuit type fax converts the discernible internet of IFP layer digital fax signal to again;

A32. by the IFP agreement steps A 31 described internet digital fax digital signals are packaged into the IFP packet, the IP layer that obtains this MGW is prepared the internet digital fax signal of processing.

When wherein, the described entity that articulates the purpose fax gateway is BSC under the MS; Among the step B, described purpose fax gateway will receive internet digital fax conversion of signals and become the method for the digital signal of circuit type fax to comprise:

B21. the purpose fax gateway decomposes from the IFP packet that the IP layer of the BSC that self articulates is uploaded and obtains internet digital fax signal;

B22. the described internet of step B21 digital fax conversion of signals is the discernible circuit type fax of protocol layer T.30/T.4 digital signal, again this circuit type fax Digital Signal Processing is become the discernible circuit type fax of IP layer digital signal;

B23. the digital signal of the discernible circuit type fax of this IP layer is carried out successively the encapsulation process of IP layer, link layer, the RLP layer that obtains this BSC is prepared the digital signal of the circuit type fax of processing.

When wherein, the described entity that articulates the purpose fax gateway is MGW under the MS; Among the step B, described purpose fax gateway becomes the method for the digital signal of circuit type fax to comprise the internet digital fax conversion of signals that receives:

B31. the purpose fax gateway decomposes from the IFP packet that the IP layer of the MGW that self articulates is uploaded and obtains internet digital fax signal;

B32. with the described internet of step B31 digital fax conversion of signals the digital signal of the discernible circuit type of protocol layer fax T.30/T.4, this circuit type facsimile signal is processed into the discernible circuit type fax of IP layer digital signal, the IP layer that obtains this MGW is prepared the circuit type fax digital signal of processing again.

By such scheme as can be seen, key of the present invention is: the IP both link ends in soft switchcall server is provided with fax gateway, be used to carry out the mutual conversion of circuit type facsimile signal and internet digital fax signal, the IFP packet that will be packaged into the internet digital fax from the circuit type facsimile signal of facsimile machine transmits on the IP link, the IFP packet that receives on the IP link is converted to the circuit type facsimile signal sends to facsimile machine.

Therefore, the transmission method of fax service data provided by the present invention can be realized the transmission of fax service data in the soft switchcall server of CDMA series, for the realization of facsimile service provides important support.And, because fax gateway is arranged on network side, therefore can there be the equipment incompatibility problem that occurs in the WCDMA soft switchcall server, the user need not to change or increase equipment when realizing facsimile service, and the compatibility between the easier realization fax gateway, like this for operator facsimile service be easier to promote and operation cost lower.

Description of drawings

Fig. 1 concerns schematic diagram for the cellular logic between MS and the Public Switched Telephone Network terminal in application the inventive method CDMA all-IP soft switchcall server;

Each entity protocol stack composition structural representation in service link when Fig. 2 is MS shown in Figure 1 and PSTN terminal transmission fax service data;

Fig. 3 concerns schematic diagram for the cellular logic between MS and the MS in application the inventive method CDMA all-IP soft switchcall server;

Fig. 4 be between the MS shown in Figure 3 during the transmitting facsimile business datum in the service link each entity protocol stack form structural representation;

Fig. 5 concerns schematic diagram for the cellular logic between MS and the MS in the CDMA soft switchcall server of using the non-all-IP of the inventive method;

Fig. 6 be between the MS shown in Figure 5 during the transmitting facsimile business datum in the service link each entity protocol stack form structural representation.

Embodiment

The present invention is further described in more detail below in conjunction with drawings and the specific embodiments.

The invention discloses a kind of transmission method of fax service data, this method is provided with source fax gateway and purpose fax gateway respectively at the IP of soft switchcall server both link ends; The main processing thought of this method is: when sending fax, the source fax gateway will convert internet digital fax signal from the circuit type facsimile signal of transmitting terminal facsimile machine to, and by the IP link of soft switchcall server internet digital fax signal will be sent to the purpose fax gateway; The purpose fax gateway becomes the circuit type facsimile signal with the internet digital fax conversion of signals that receives again, and sends the circuit type facsimile signal to the receiving terminal facsimile machine.Be that example is described in detail the inventive method below with the cdma system.

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, in the service link of different type of calls, the distribution of IP carrying section is different, therefore, the position that IWF is set and protocol stack are formed structure also can some difference, this paper is that example is described the transmission method of fax service data of the present invention with four representational type of calls, the service data transmission method of other type of calls similarly, this paper no longer describes.Here, described type of call comprises: the calling in the all-IP soft switchcall server between MS and the PSTN terminal, calling in the all-IP soft switchcall server between the MS, the calling in the calling in the soft switchcall server of non-all-IP between the MS, the soft switchcall server of non-all-IP between MS and the PSTN terminal.

Fig. 1 concerns schematic diagram for the cellular logic between MS and the PSTN terminal in application the inventive method 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 MSCe1 under A interface protocol 5.0 versions (IOS5.0) link and this MS, by the MGW1 interactive media stream of IP link and this MSCe1 control.Described PSTN terminal communicates by two wires analog circuit signal (2W) and the PSTN switch under self, this PSTN terminal is the IP link by this PSTN switch access softswitch system also, and wherein the entity that at first connects during the IP link of PSTN terminal access softswitch system is the MGW2 shown in the figure.Described PSTN switch carries out Signalling exchange by ISUP (ISUP) signaling with the MSCe2 that controls MGW2, by time division multiplexing (TDM) link and MGW2 interactive media stream.MSCe1 and MSCe2 control MGW1 and MGW2 respectively by protocol signaling H.248.Wherein, MSCe1 can be same or different entities with MSCe2, if be different entities, then undertaken alternately by soft switch interoffice (SIP-T) signaling between MSCe1 and the MSCe2 based on initial session protocol, then flow between MGW1 and the MGW2 by IP link interactive media.Here be depicted as cellular logic and concern schematic diagram, close in physical connection and fasten, the information interaction between MSCe and the external entity is the MGW transparent transmission by self controlling all.

Among Fig. 1, MS is mounted with FAX1, and PSTN terminal/FAX2 represents to possess the PSTN terminal of facsimile function, so MS and PSTN terminal can be set up facsimile service passage, mutual fax service data.As seen from Figure 1, in the facsimile service link between MS and PSTN terminal, IP carrying section is BSC to MGW2.Therefore, if the FAX1 that MS articulates is the transmitting terminal facsimile machine, the entity that connects at first when then BSC inserts this IP link for this MS, thus source fax gateway IWF is articulated on this BSC; And the entity that MGW2 connects when inserting this IP link for this PSTN terminal at first, thereby purpose fax gateway IWF is articulated on the MGW2.

Below in conjunction with Fig. 2 the fax service data transmission method of type of call shown in Figure 1 is described in detail.Each entity protocol stack composition structural representation in service link when Fig. 2 is MS shown in Figure 1 and PSTN terminal transmission fax service data.

Among Fig. 2, Lower Half is depicted as the distribution situation of each entity in the facsimile service link.As shown in Figure 2, the entity on the facsimile service link is followed successively by from left to right: FAX1, MS, BSC, MGW1, MGW2, PSTN switch and PSTN terminal/FAX2.Wherein, for 2W is connected, setting up ppp link between MS and the BSC between FAX1 and the MS, is the IP link bearer between BSC, MGW1, the MGW2, between MGW2 and the PSTN switch for being connected for 2W between TDM carrying, PSTN switch and the PSTN terminal.Articulate fax gateway IWF on BSC and the MGW2 respectively.

Among Fig. 2, the first half is depicted as each entity corresponding protocols stack composition structure of Lower Half among the figure, and the protocol stack of the IWF that articulates in the dash area presentation-entity is wherein formed.Here, setting FAX1 is the transmitting terminal facsimile machine, and at this moment, the IWF on the BSC is the source fax gateway, and the IWF on the MGW2 is the purpose fax gateway.

Wherein, described source fax gateway IWF at first handles as the data payload of separating of PPP layer, IP layer carry out link layer (Link Layer) successively from the circuit type facsimile signal of BSC radio link protocol (RLP) layer, obtains the digital signal of circuit type fax; The circuit type fax digital signal that to be somebody's turn to do then from the IP layer converts the T.30/T.4 discernible fax digital signal of protocol layer to, converts this fax digital signal T.30/T.4 to IFP layer discernible fax digital signal again; By Internet Facsimile Protocol (IFP) agreement this digital signal is packaged into the IFP packet at last, the IP layer that obtains this BSC is prepared the internet digital fax signal of processing.Described purpose fax gateway IWF at first decomposes the fax digital signal that obtains IFP by the IFP agreement from the IFP packet that MGW2 uploads; Then the fax digital signal of this IFP is converted to fax digital signal T.30/T.4, the 2W transmission channel that converts this digital signal T.30/T.4 to MGW2 by agreement is T.30/T.4 prepared the circuit type fax analog signal handled again.Here, mutual conversion between the discernible fax digital signal of described T.30/T.4 protocol layer and IFP layer, the process that the IFP packet transmits on the IP link and the encapsulation and the decomposable process of IFP packet, belong to the T.38 internet digital fax implementation procedure of agreement defined, therefore T.38 agreement regulation is followed in the concrete processing of this process inside, and this paper is not described further.The fax digital signal of IFP described herein belongs to internet digital fax signal, and described fax digital signal T.30/T.4 belongs to the digital signal of circuit type fax.

Form structure below in conjunction with the protocol stack shown in Fig. 2 first half, the transmission course of data in the current facsimile service link is described in detail.

When FAX1 is the transmitting terminal facsimile machine, data transmission procedure can be divided into three sections: one, the IWF that articulates to BSC of FAX1, two, the IWF that articulates of the IWF to MGW2 that articulates of BSC, three, IWF to PSTN terminal/FAX2 of articulating of MGW2, then the data of description transmission course is as follows piecemeal:

One, the IWF that articulates to BSC of FAX1:

FAX1 converts the digital signal of circuit type fax to analog signal by agreement T.30/T.4, and the facsimile signal of this simulation is sent to MS by the analog signal transmission channel of 2W/RS-232.The 2W/RS-232 channel of MS receives the 2W/RS-232 analog facsimile signal, the application programming interfaces on upper strata (APP.Int) convert the 2W/RS-232 analog facsimile signal that receives to the accessible circuit type fax of IP link digital signal, comprise: this analog signal is modulated into processing such as digital signal, data compression, by IP/ transmission control protocol (TCP) layer this digital signal is packaged into the IP packet again.Then, be packaged into the encapsulation process that the digital fax signal of IP packet passes through PPP layer, RLP layer successively, again by the BSC that eats dishes without rice or wine to be sent to based on the IS-95/2000 standard.BSC is from the IS-95/2000 received signal of eating dishes without rice or wine, the processing of separating rlp frame to the received signal, and the payload user data of the rlp frame that processing is obtained is uploaded to the IWF that self articulates again.FAX described herein is group 3 teletypewriter sets (G3FE), T.30 G3FE possesses or the entity of circuit type facsimile protocol communication interface T.4, therefore described FAX1 sends is the facsimile signal of agreement T.30 or T.4, and this paper is expressed as T.30/T.4 agreement with the circuit type facsimile protocol.

Two, the IWF that articulates of the IWF to MGW2 that articulates of BSC:

Described IWF receives data from the RLP layer of BSC, and the data payload of separating that these data are carried out PPP layer, IP/TCP layer is handled successively, and the IP payload user data that will decomposite from the IP layer is that the digital signal of circuit type fax is sent to the APP.Int layer; The APP.Int layer will be somebody's turn to do from the circuit type of IP layer fax digital signal and be converted to T.30/T.4 fax digital signal, comprise: processing such as data decompression; T.30/T.4 the protocol layer fax digital signal that will receive is converted to the discernible fax digital signal of IFP layer and exports IFP/ internet facsimile transmission agreement (IFT) layer to then; The fax digital signal that the IFP/IFT layer will receive is packaged into the IFP packet and is sent to BSC.IP/TCP/ User Datagram Protoco (UDP) (UDP) layer of this BSC further is encapsulated as the IP packet with the IFP packet that receives, and reaches link layer and the physical layer (Link﹠amp of BSC then down; Physical Layer), and by this Link﹠amp; Physical Layer is sent to MGW1 with fax service data.Data are from the Link﹠amp of MGW1; Physical Layer is uploaded to the IP/TCP/UDP layer, is issued to Link﹠amp by the IP/TCP/UDP layer again; Physical Layer is sent to MGW2 then.Data are process Link﹠amp in MGW2; The processing of Physical Layer, IP/TCP/UDP layer finally is sent to the IWF that MGW2 articulates.Here, described Link﹠amp; Physical Layer comprises: link layer such as PPP layer, RLP layer and physical layer, because this processing of three layers belongs to known technology, describe for simplifying protocol stack of the present invention, and therefore use Link﹠amp; Physical Layer represents.

Three, IWF to PSTN terminal/FAX2 of articulating of MGW2:

Described IWF receives IP packet payload from the IP/TCP/UDP layer of MGW2, it is the IFP packet, this IFP packet is carried out the IFP/IFT layer handle, from the IFP packet, decompose and obtain the digital signal of faxing, and the fax digital signal of this IFP is converted to T.30/T.4 fax digital signal; The analog signal that this fax digital signal T.30/T.4 is converted to the circuit type fax by protocol layer T.30/T.4 is sent to the 2W transmission channel of MGW2 then.MGW2 by and the PSTN switch between the 2W transmission channel send the analog signal of this circuit type fax to PSTN terminal/FAX2.PSTN terminal/FAX2 is from the analog signal of the 2W transmission channel receiving circuit type fax of self and be uploaded to T.30/T.4 protocol layer and handle, obtain the digital signal of circuit type fax, thereby FAX2 can be converted into outputs such as literal, image with the digital signal of this circuit type fax.

Said process is primarily aimed at the service surface data processing of facsimile service.Wherein, described TCP, UDP are the chain of command protocol layer, are used for the transmission of IP packet is controlled; Described T.30/T.4 protocol layer also relates to the processing of chain of command, mainly comprise: the transmission to the circuit type facsimile signal is monitored, to the part that receives T.30/T.4 fax signaling carry out this locality and handle or be converted to the IFP facsimile signal and between IWF, send or the like.Because the processing of these chains of command does not belong to emphasis of the present invention, so this paper is not described further.

When FAX2 was the transmitting terminal facsimile machine, the processing with above-mentioned FAX1 during as the transmitting terminal facsimile machine was just the opposite.Therefore, the IWF that BSC articulates is the purpose fax gateway, and the IWF that MGW2 articulates is the source fax gateway; Data transmission procedure also is divided into three sections: one, the IWF that articulates to MGW2 of PSTN terminal/FAX2, two, the IWF that articulates of the IWF to BSC that articulates of MGW2, three, the IWF to FAX1 that articulates of BSC, then the data transmission procedure of describing piecemeal is also opposite with above-mentioned transmission course, and concrete processing method is as follows:

One, the IWF that articulates to MGW2 of PSTN terminal/FAX2:

PSTN terminal/FAX2 converts the digital signal of circuit type fax to analog signal by agreement T.30/T.4, and the facsimile signal that will simulate by 2W analog signal transmission channel is sent to the PSTN switch; The analog signal of this circuit type being faxed by the 2W channel of this PSTN switch is sent to MGW2 then.MGW2 receives the 2W analog facsimile signal from the 2W transmission channel of self, and is uploaded to the IWF that MGW2 articulates; The T.30/T.4 protocol layer of this IWF receives this analog facsimile signal, convert thereof into digital signal by agreement T.30/T.4, and convert this fax digital signal T.30/T.4 the fax digital signal of IFP to, be packaged into the IFP packet and be sent to MGW2 by the fax digital signal of IFP/IFT layer again this IFP.

Two, the IWF that articulates of the IWF to BSC that articulates of MGW2:

The IP/TCP/UDP layer of described MGW2 receives the IFP packet from the IWF that self articulates, and further it is packaged into the IP packet and passes through Link﹠amp; Physical Layer is sent to MGW1 with data; These data are passed through Link﹠amp successively at MGW1; The data payload of separating of Physical Layer, IP/TCP/UDP layer is handled, and passes through IP/TCP/UDP layer, Link﹠amp more successively; The encapsulation process of Physical Layer is sent to BSC then.Data are passed through Link﹠amp successively at BSC; The data payload of separating of Physical Layer, IP/TCP/UDP layer is handled and to be obtained the IFP packet, the IWF that this IFP packet is addressed to BSC subsequently and is articulated.The IFP/IFT layer of this IWF decomposes the fax digital signal that obtains IFP from the IFP packet that receives, convert the fax digital signal of this IFP the fax digital signal of agreement T.30/T.4 to by protocol layer T.30/T.4 then and be sent to the APP.Int layer of IWF, the fax Digital Signal Processing T.30/T.4 that the APP.Int layer will receive again becomes the accessible circuit type of IP link fax digital signal, successively the digital signal of this circuit type fax is carried out encapsulation process by IP/TCP layer, the PPP layer of lower floor again and is sent to BSC.

Three, the IWF that articulates of BSC is to FAX1:

Data eat dishes without rice or wine to be sent to MS by IS-95/2000 after the encapsulation of described BSC through the RLP layer.MS carries out the data payload of separating of RLP layer, PPP layer, IP/TCP layer successively and handles from the IS-95/2000 business datum of receiving faxes of eating dishes without rice or wine to these data, obtain the digital signal of circuit type fax; APP.Int layer by the upper strata will be an analog signal from the circuit type fax Digital Signal Processing of IP layer again, comprise: data decompression, digital demodulation signal is become analog signal or the like, the analog signal of this circuit type fax is sent to FAX1 by the 2W/RS-232 transmission channel between MS and the FAX1 more then.FAX1 is from the analog signal of the transmission channel receiving circuit type of 2W/RS-232 fax, be the digital signal of circuit type fax by agreement T.30/T.4 with this analog signal conversion, thereby FAX1 can be converted into this digital signal literal, image output.

Fig. 3 concerns schematic diagram for the cellular logic between MS and the MS in application the inventive method CDMA all-IP soft switchcall server.As shown in Figure 3, 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, MS1 and MS2 by PPP be connected respectively with separately under BSC1 and BSC2 communicate, BSC1 and BSC2 by the IOS5.0 link respectively with each MS under MSCe1 and MSCe2 carry out Signalling exchange, by the IP link respectively with the MGW1 and the MGW2 interactive media stream of MSCe1 and MSCe2 control.MSCe1 and MSCe2 pass through H.248 protocol signaling control MGW1 and MGW2 respectively.Wherein, MSCe1 can be same or different entities with MSCe2, if be different entities, is then undertaken alternately by the SIP-T signaling between MSCe1 and the MSCe2, then flows by IP link interactive media between MGW1 and the MGW2.

Among Fig. 3, MS1 and MS2 are mounted with FAX1 and FAX2 respectively, thus can set up the facsimile service passage between MS1 and the MS2, mutual fax service data.As seen from Figure 3, in the facsimile service link between MS1 and MS2, IP carrying section is the link between BSC1 and the BSC2.Therefore BSC1 is respectively the entity that is connected at first when MS1 inserts this IP link with MS2 with BSC2, thereby, if FAX1 as the transmitting terminal facsimile machine, then source fax gateway IWF and purpose fax gateway IWF are articulated in respectively on BSC1 and the BSC2.

Below in conjunction with Fig. 4 the method for the fax service data transmission of type of call shown in Figure 3 is described in detail.Fig. 4 be between the MS shown in Figure 3 during the transmitting facsimile business datum in the service link each entity protocol stack form structural representation.

Among Fig. 4, Lower Half is the distribution situation of each entity in the facsimile service link shown in Figure 3, and the entity on the facsimile service link is followed successively by from left to right: FAX1, MS1, BSC1, MGW1, MGW2, BSC2, MS2 and FAX2.Between FAX1 and the MS1, be 2W between FAX2 and the MS2 and be connected, all set up ppp link between MS1 and the BSC1 and between MS2 and the BSC2, be the IP link bearer between BSC1, MGW1, MGW2, the BSC2, BSC1 and BSC2 are mounted with fax gateway IWF respectively.

Among Fig. 4, the first half is depicted as each entity corresponding protocols stack composition structure of Lower Half among the figure, and the protocol stack of the IWF that articulates in the dash area presentation-entity is wherein formed.Here, setting FAX1 is the transmitting terminal facsimile machine, and at this moment, the IWF on the BSC1 is the source fax gateway, and the IWF on the BSC2 is the purpose fax gateway.

Wherein, described source fax gateway IWF at first handles the data payload of separating that carries out PPP layer, IP layer from the circuit type fax digital signal of RLP layer among the BSC1 successively, obtains the digital signal of circuit type fax; The circuit type fax digital signal that to be somebody's turn to do then from the IP layer converts the T.30/T.4 discernible fax digital signal of layer to, again this fax digital translation is T.30/T.4 become the discernible fax digital signal of IFP layer; By the IFP agreement the discernible digital signal of this IFP layer is packaged into the IFP packet at last, the IP layer that obtains BSC1 is prepared the internet digital fax signal of processing.Described purpose fax gateway IWF at first decomposes the fax digital signal that obtains IFP by the IFP agreement from the IFP packet that BSC2 uploads; Then the fax digital signal of this IFP is converted to fax digital signal T.30/T.4, the digital signal with this circuit type fax converts the accessible fax digital signal of IP link to again; At last this digital signal is carried out successively the encapsulation process of IP layer, PPP layer, the RLP layer that obtains BSC2 is prepared the circuit type fax digital signal of processing.

Form structure below in conjunction with the protocol stack shown in Fig. 4 first half, the transmission course of data in the current facsimile service link is described in detail.

Described similar with Fig. 2, when FAX1 was the transmitting terminal facsimile machine, data transmission procedure also can be divided into three sections: one, the IWF that articulates to BSC1 of FAX1, two, the IWF that articulates of the IWF to BSC2 that articulates of BSC1, three, the IWF to FAX2 that articulates of BSC2, then the data of description transmission course is as follows piecemeal:

One, the IWF that articulates to BSC1 of FAX1:

The processing of the IWF that articulates to BSC with the described FAX1 of Fig. 2 is identical.The circuit type facsimile signal that FAX1 sends is processed to be analog signal through protocol layer T.30/T.4, and is sent to MS1 by the analog channel of 2W/RS-232.The 2W/RS-232 channel of MS1 receives analog facsimile signal, and this analog facsimile signal eats dishes without rice or wine to be sent to BSC1 by IS-95/2000 again in the processing that MS1 passes through APP.Int layer, IP/TCP layer, PPP layer, RLP layer successively.BSC1 is from the IS-95/2000 received signal of eating dishes without rice or wine, the processing of separating rlp frame to the received signal, and the payload user data of the rlp frame that processing is obtained is uploaded to the IWF that self articulates again.This IWF receives data from the RLP layer of BSC1, and the data payload of separating that these data are carried out PPP layer, IP/TCP layer is handled successively, by the APP.Int layer data is converted to the T.30/T.4 discernible fax digital signal of layer again; This fax digital signal T.30/T.4 through T.30/T.4 protocol layer, the processing of IFP/IFT layer, obtains the IFP packet and is sent to BSC1 successively then.

Two, the IWF that articulates of the IWF to BSC2 that articulates of BSC1:

The data that the IWF that BSC1 articulates self sends are carried out IP/TCP/UDP layer Link﹠amp successively; The encapsulation process of Physical Layer, and by this Link﹠amp; Physical Layer is sent to MGW1 with fax service data, by MGW2 data is sent to BSC2 by MGW1 again.BSC2 carries out Link﹠amp successively to data; The data payload of separating of Physical Layer, IP/TCP/UDP layer is handled, and then the IFP packet that obtains is sent to the IWF that BSC2 articulates.Wherein, data are identical with the processing among the MGW2 at MGW1, all pass through Link﹠amp successively; The data payload of separating of Physical Layer, IP/TCP/UDP layer is handled, and passes through IP/TCP/UDP layer, Link﹠amp more successively; The encapsulation process of Physical Layer.

Three, the IWF to FAX2 that articulates of BSC2:

The processing of the IWF that data articulate at BSC2 and the processing of the IWF that above-mentioned BSC1 articulates are just the opposite.The IFP/IFT layer of the IWF that BSC2 articulates decomposes from the IFP packet that receives and obtains internet digital fax signal, then with the internet digital fax conversion of signals of this IFP for the discernible fax digital signal of protocol layer T.30/T.4 and be sent to the APP.Int layer of IWF, the digital signal of T.30/T.4 faxing that the APP.Int layer will receive converts the digital signal of the accessible circuit type fax of IP link to, comprising: processing such as data compression; Successively the digital signal of this circuit type fax is carried out encapsulation process by the IP/TCP layer of lower floor, PPP layer again and be sent to BSC2.Data eat dishes without rice or wine to be sent to MS2 by IS-95/2000 after the encapsulation of BSC2 through the RLP layer.MS2 carries out the data payload of separating of RLP layer, PPP layer, IP/TCP layer successively and handles from the IS-95/2000 business datum of receiving faxes of eating dishes without rice or wine to these data, obtain the digital signal of circuit type fax; APP.Int layer by the upper strata will change analog facsimile signal into from the facsimile data biography of IP layer again, comprise: data are decompressed, are analog signal or the like with digital demodulation signal the analog signal of this circuit type fax is sent to FAX2 by the 2W/RS-232 transmission channel between MS2 and the FAX2 more then.FAX2 is from the analog signal of the transmission channel receiving circuit type of 2W/RS-232 fax, be the digital signal of circuit type fax by agreement T.30/T.4 with this analog signal conversion, thereby FAX2 can be converted into this digital signal literal, image output.

When FAX2 was the transmitting terminal facsimile machine, the processing with above-mentioned FAX1 during as the transmitting terminal facsimile machine was just the opposite.The IWF that BSC1 articulates is the purpose fax gateway, and the IWF that BSC2 articulates is the source fax gateway; Data transmission procedure also is divided into three sections: one, the IWF that articulates to BSC2 of FAX2, two, the IWF that articulates of the IWF to BSC1 that articulates of BSC2, three, the IWF to FAX1 that articulates of BSC1.According to protocol stack shown in Figure 4, the composition structure of each FAX, each MS, each BSC and each MGW protocol stack is identical, and the protocol stack equity of the IWF that articulates on BSC1 and the BSC2.As seen, the transfer of data of the IWF that FAX2 articulates to BSC2, the processing of the IWF that articulates to BSC1 with above-mentioned FAX1 is identical; The transfer of data of the IWF that the IWF to BSC1 that BSC2 articulates articulates, the processing of the IWF that articulates with IWF to BSC2 that above-mentioned BSC1 articulates is identical; The data transmission procedure of the IWF to FAX1 that BSC1 articulates, the processing of the IWF to FAX2 that articulates with above-mentioned BSC2 is also identical.Therefore, here each stage in the data transmission procedure is not described in detail.

Above Fig. 1 is to Figure 4 shows that the inventive method is applied to the processing in the all-IP soft switchcall server.In the soft switchcall server of non-all-IP, the A interface is IPization not also, and link is the TDM carrying between BSC and the MGW.Therefore, during the transmitting facsimile business datum, the setting of IWF and data transmission method are slightly different with the processing in the above-mentioned all-IP soft switchcall server in the soft switchcall server of non-all-IP.

Fig. 5 concerns schematic diagram for the cellular logic between MS and the MS in the CDMA soft switchcall server of using the non-all-IP of the inventive method.As shown in Figure 5, 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, MS1 and MS2 by PPP be connected respectively with separately under BSC1 and BSC2 communicate, BSC1 and BSC2 respectively with each MS under MSCe1 and MSCe2 carry out Signalling exchange, by the TDM link respectively with the MGW1 and the MGW2 interactive media stream of MSCe1 and MSCe2 control.MSCe1 and MSCe2 pass through H.248 protocol signaling control MGW1 and MGW2 respectively.Wherein, MSCe1 can be same or different entities with MSCe2, if be different entities, is then undertaken alternately by the SIP-T signaling between MSCe1 and the MSCe2, then flows by IP link interactive media between MGW1 and the MGW2.

Among Fig. 5, MS1 and MS2 are mounted with FAX1 and FAX2 respectively, thus can set up the facsimile service passage between MS1 and the MS2, mutual fax service data.As seen from Figure 5, in the facsimile service link between MS1 and MS2, IP carrying section is the link between MGW1 and the MGW2.Therefore MGW1 is respectively the entity that is connected at first when MS1 inserts this IP link with MS2 with MGW2, thereby, if FAX1 as the transmitting terminal facsimile machine, then source fax gateway IWF and purpose fax gateway IWF are articulated in respectively on MGW1 and the MGW2.

Below in conjunction with Fig. 6 the method for the fax service data transmission of type of call shown in Figure 5 is described in detail.Fig. 6 be between the MS shown in Figure 5 during the transmitting facsimile business datum in the service link each entity protocol stack form structural representation.

Among Fig. 6, Lower Half is the distribution situation of each entity in the facsimile service link shown in Figure 5, and the entity on the facsimile service link is followed successively by from left to right: FAX1, MS1, BSC1, MGW1, MGW2, BSC2, MS2 and FAX2.Between FAX1 and the MS1, be 2W between FAX2 and the MS2 and be connected, all set up the RLP link between MS1 and the BSC1 and between MS2 and the BSC2, be the TDM link bearer between BSC1 and the MGW1 and between BSC2 and the MGW2, connect for IP between MGW1 and the MGW2 and be mounted with fax gateway IWF respectively.

Among Fig. 6, the first half is depicted as each entity corresponding protocols stack composition structure of Lower Half among the figure, and the protocol stack of the IWF that articulates in the dash area presentation-entity is wherein formed.Here, setting FAX1 is the transmitting terminal facsimile machine, and at this moment, the IWF on the MGW1 is the source fax gateway, and the IWF on the MGW2 is the purpose fax gateway.

Wherein, described source fax gateway IWF is from the IP/TCP layer receiving circuit type fax digital signal of MGW1, this digital signal from the IP layer is converted to the T.30/T.4 discernible fax digital signal of layer, converts this fax digital signal T.30/T.4 to IFP layer discernible fax digital signal again; By the IFP agreement the discernible fax digital signal of this IFP layer is packaged into the IFP packet at last, the IP layer that obtains MGW1 is prepared the internet digital fax signal of processing.Described purpose fax gateway IWF at first decomposes from the IFP packet that MGW2 uploads by the IFP agreement and obtains internet digital fax signal; Then the internet digital fax conversion of signals of this IFP is the discernible fax digital signal of layer T.30/T.4, again this fax Digital Signal Processing is T.30/T.4 become the discernible fax digital signal of IP link, the IP layer that obtains MGW2 is prepared the circuit type fax digital signal of processing.

Form structure below in conjunction with the protocol stack shown in Fig. 6 first half, the transmission course of data in the current facsimile service link is described in detail.

With noted earlier similar, when FAX1 was the transmitting terminal facsimile machine, data transmission procedure also can be divided into three sections: one, the IWF that articulates to MGW1 of FAX1, two, the IWF that articulates of the IWF to MGW2 that articulates of MGW1, three, the IWF to FAX2 that articulates of MGW2, then the data of description transmission course is as follows piecemeal:

One, the IWF that articulates to MGW1 of FAX1:

FAX1 described here is identical to the processing of BSC1 with the described FAX1 of Fig. 4 to the processing of BSC1.The circuit type facsimile signal that FAX1 sends is processed to be analog signal through protocol layer T.30/T.4, and is sent to MS1 by the analog channel of 2W/RS-232.The 2W/RS-232 channel of MS1 receives the 2W/RS-232 analog facsimile signal, and this analog facsimile signal eats dishes without rice or wine to be sent to BSC1 by IS-95/2000 again in the processing that MS1 passes through APP.Int layer, IP/TCP layer, PPP layer, RLP layer successively.BSC1 is from the IS-95/2000 received signal of eating dishes without rice or wine, the processing of separating rlp frame to the received signal, and the payload user data of the rlp frame that processing is obtained is uploaded to MGW1 by relay layer (Relay Layer) then.MGW1 handles the data payload of separating that the data that receive are carried out PPP layer, IP/TCP layer successively, obtains the digital signal that IWF that MGW1 articulates prepares the circuit type fax handled.This IWF receives data from the IP/TCP layer of MGW1, by the APP.Int layer data that receive is converted to the T.30/T.4 discernible fax digital signal of layer; This fax digital signal T.30/T.4 through T.30/T.4 protocol layer, the processing of IFP/IFT layer, obtains the IFP packet and is sent to MGW1 successively then

Two, the IWF that articulates of the IWF to BSC2 that articulates of BSC1:

The data that the IWF that MGW1 articulates self sends are carried out IP/TCP/UDP layer, Link﹠amp successively; The encapsulation process of Physical Layer, and by this Link﹠amp; Physical Layer is sent to MGW2 with fax service data.By MGW2 data are carried out Link﹠amp successively; The data payload of separating of Physical Layer, IP/TCP/UDP layer is handled, and the IFP packet that obtains also is sent to the IWF that MGW2 articulates.

Three, the IWF to FAX2 that articulates of MGW2:

Processing and the IWF that articulates of above-mentioned MGW1 in the IWF that MGW2 articulates is just the opposite to the processing of data for data.The IFP/IFT layer of the IWF that MGW2 articulates decomposes from the IFP packet that receives and obtains internet digital fax signal, then with the internet digital fax signal processing of this IFP for the discernible fax digital signal of protocol layer T.30/T.4 and be sent to the APP.Int layer of IWF, the digital signal of T.30/T.4 faxing that the APP.Int layer will receive converts the digital signal of the manageable circuit type fax of IP link to and exports MGW2 to.MGW2 carries out the encapsulation process of IP/TCP layer, PPP layer successively to data, by Relay Layer data is sent to BSC2 again.Then, data eat dishes without rice or wine to be sent to MS2 by IS-95/2000 after the encapsulation of BSC2 through the RLP layer.MS2 carries out the data payload of separating of RLP layer, PPP layer, IP/TCP layer successively and handles from the IS-95/2000 business datum of receiving faxes of eating dishes without rice or wine to these data, obtain the digital signal of circuit type fax; To be converted to the analog signal of circuit type fax again from the fax digital signal of IP layer by the APP.Int layer on upper strata, the analog signal of this circuit type fax is sent to FAX2 by the 2W/RS-232 transmission channel between MS2 and the FAX2 more then.FAX2 is from the analog signal of the transmission channel receiving circuit type of 2W/RS-232 fax, be the digital signal of circuit type fax by agreement T.30/T.4 with this analog signal conversion, thereby FAX2 can be converted into this digital signal literal, image output.

When FAX2 was the transmitting terminal facsimile machine, the processing with above-mentioned FAX1 during as the transmitting terminal facsimile machine was just the opposite.The IWF that MGW1 articulates is the purpose fax gateway, and the IWF that MGW2 articulates is the fax gateway in source; Data transmission procedure is also corresponding to be divided into three sections: one, the IWF that articulates to MGW2 of FAX2, two, the IWF that articulates of the IWF to MGW1 that articulates of MGW2, three, the IWF to FAX1 that articulates of MGW1.According among Fig. 4 shown in the protocol stack, the composition structure of each FAX, each MS, each BSC and each MGW protocol stack is identical, and the protocol stack equity of the IWF that articulates on MGW1 and the MGW2.As seen, the transfer of data of the IWF that FAX2 articulates to MGW2, the processing of the IWF that articulates to MGW1 with above-mentioned FAX1 is identical; The transfer of data of the IWF that the IWF to MGW1 that MGW2 articulates articulates, the processing of the IWF that articulates with IWF to MGW2 that above-mentioned MGW1 articulates is identical; The data transmission procedure of the IWF to FAX1 that MGW1 articulates, the processing of the IWF to FAX2 that articulates with above-mentioned MGW2 is also identical.Therefore, here each stage in the data transmission procedure is not described in detail.

When the inventive method is applied in the CDMA soft switchcall server of non-all-IP the facsimile service between the MS and PSTN terminal, because, be the TDM carrying between BSC under the MS and the MGW, therefore, the facsimile service link from FAX that MS articulates to PSTN terminal/FAX, IP carrying section MGW under the MS is till the MGW that connects at first during to the IP link of PSTN terminal access softswitch system.Articulate fax gateway IWF respectively on the MGW that is connected at first when like this, the MGW under the MS inserts this IP link with the PSTN terminal.

In such cases, the present invention combines the protocol stack that Fig. 2 and the described two kinds of technical schemes of Fig. 6 are come the construction data transmission.In the MS side, the protocol stack of the IWF that MGW and this MGW articulate under BSC, the MS under FAX, MS, the MS is formed structure and FAX1 shown in Figure 6, MS1, BSC1, MGW1/IWF are identical; In the PSTN end side, the protocol stack of the IWF that the MGW that connects at first when PSTN terminal/FAX, PSTN switch, PSTN terminal accessing IP link and this MGW articulate is formed structure and PSTN terminal/FAX2 shown in Figure 2, PSTN switch, MGW2/IWF is identical.

Because, in the MGW1/IWF protocol stack shown in Figure 6, the MGW1 protocol stack ends at the IP/TCP/UDP layer, in the MGW2/IWF protocol stack shown in Figure 2, the MGW2 protocol stack also ends at the IP/TCP/UDP layer, therefore in conjunction with Fig. 2 and two kinds of MGW/IWF protocol stack structures shown in Figure 6, can realize between the MGW sending based on the IP data carried by data.And, according to data transmission procedure noted earlier as can be known, adopt the protocol stack structure of each entity of the described PSTN side of Fig. 2, can realize the facsimile data transmission between MGW/IWF and the PSTN terminal/FAX; Adopt the protocol stack structure of each entity of the described MS side of Fig. 6, also can realize the facsimile data transmission between FAX that MS articulates and the MGW/IWF.As seen, can realize the facsimile data transmission between the MS and PSTN terminal in the non-all-IP soft switchcall server in conjunction with Fig. 2 and two kinds of execution modes shown in Figure 6.Because the front is described in detail the transmission of fax service data in conjunction with Fig. 2 and the described protocol stack composition of Fig. 6 structure, therefore, no longer specifically describes data transmission procedure here.

In sum, use the inventive method and can realize the transmission of fax service data in the CDMA/CDMA 2000/CDMA 1X soft switchcall server, thereby further make the realization of soft switchcall server facsimile service become possibility.

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

1, a kind of transmission method of fax service data is characterized in that, at the Internet Protocol IP of soft switchcall server both link ends source fax gateway and purpose fax gateway is set respectively; This method comprises:

2, method according to claim 1 is characterized in that, described transmitting terminal is connected mobile terminal MS and public switched telephone network (PSTN) PSTN terminal respectively with the receiving terminal facsimile machine; The entity that the described entity that articulates the source fax gateway connects during described IP link at first for this MS inserts, this entity is base station controller BSC or the media gateway MGW under this MS; The MGW that the described entity that articulates the purpose fax gateway connects during described IP link at first for this PSTN terminal inserts;

In the steps A, the circuit type facsimile signal that described source fax gateway receives is the digital signal of circuit type fax;

Among the step B, the circuit type facsimile signal that described purpose fax gateway converts to is the analog signal of circuit type fax.

3, method according to claim 2 is characterized in that, among the step B, described purpose fax gateway becomes the method for the analog signal of circuit type fax to comprise the internet digital fax conversion of signals that receives:

B11. the purpose fax gateway decomposes from the Internet Facsimile Protocol IFP packet that the MGW that self articulates uploads and obtains internet digital fax signal;

4, method according to claim 1 is characterized in that, described transmitting terminal is connected PSTN terminal and MS respectively with the receiving terminal facsimile machine; The MGW that the described entity that articulates the source fax gateway connects during described IP link at first for this PSTN terminal inserts; The entity that the described entity that articulates the purpose fax gateway connects during described IP link at first for this MS inserts, this entity is BSC or the MGW under the described MS;

In the steps A, the circuit type facsimile signal that described source fax gateway receives is the analog signal of circuit type fax;

Among the step B, the circuit type facsimile signal that described purpose fax gateway converts to is the digital signal of circuit type fax.

5, method according to claim 4 is characterized in that, in the steps A, described source fax gateway comprises the method for the special netting index word of the analog signal conversion origin cause of formation facsimile signal that the circuit type that receives is faxed:

6, method according to claim 1 is characterized in that, described transmitting terminal is connected MS respectively with the receiving terminal facsimile machine; The entity that the MS that the described entity that articulates the source fax gateway connects for the transmitting terminal facsimile machine connects when inserting described IP link at first, this entity be affiliated BSC or MGW of this MS; The entity that the MS that the described entity that articulates the purpose fax gateway connects for the receiving terminal facsimile machine connects when inserting described IP link at first, this entity be affiliated BSC or MGW of this MS;

7, according to claim 2,3 or 6 described methods, it is characterized in that, when the described entity that articulates the source fax gateway is BSC under the MS;

In the steps A, the method that the digital signal that described source fax gateway is faxed the circuit type that receives converts internet digital fax signal to comprises:

A21. the radio link protocol RLP layer circuit type fax digital signal uploaded of source fax gateway BSC that self the is articulated data payload of separating that carries out link layer, IP layer is successively handled, and obtains the digital signal of circuit type fax;

8, according to claim 2,3 or 6 described methods, it is characterized in that, when the described entity that articulates the source fax gateway is MGW under the MS;

9, according to each described method of claim 4 to 6, it is characterized in that, when the described entity that articulates the purpose fax gateway is BSC under the MS;

Among the step B, described purpose fax gateway will receive internet digital fax conversion of signals and become the method for the digital signal of circuit type fax to comprise:

10, according to each described method of claim 4 to 6, it is characterized in that, when the described entity that articulates the purpose fax gateway is MGW under the MS;

Among the step B, described purpose fax gateway becomes the method for the digital signal of circuit type fax to comprise the internet digital fax conversion of signals that receives: