WO2012075751A1

WO2012075751A1 - System and method for realizing cross-protocol voice-to-fax

Info

Publication number: WO2012075751A1
Application number: PCT/CN2011/071866
Authority: WO
Inventors: 马甄; 李平华
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-12-10
Filing date: 2011-03-16
Publication date: 2012-06-14
Also published as: CN102547634A; CN102547634B

Abstract

The present invention discloses a method for realizing a cross-protocol voice-to-fax service. The method includes the following steps: during the process of voice communication between a first mobile terminal (MT) and a second MT, the first MT initiates, according to a voice-to-fax indication, fax service negotiation to a first base station controller (BSC) connecting with the first MT and switches to the fax service after completing the negotiation; the first BSC transmits the voice-to-fax indication to a second BSC connecting with the second MT; according to the voice-to-fax indication, the second BSC initiates fax service negotiation to the second MT on the basis of multiple fax protocols one by one until the negotiation succeeds, and then switches to the fax service on the basis of the fax protocol agreed by both sides, wherein the multiples fax protocols are supported by the second BSC. The invention also discloses a system and BSC for realizing a cross-protocol voice-to-fax service. Applying the invention improves the success rate of the voice-to-fax service in a mobile communication system.

Description

System and method for realizing cross-protocol voice-to-fax

TECHNICAL FIELD The present invention relates to the field of mobile communications technologies, and in particular, to a system, method, and base station controller for implementing voice-to-fax communication across protocols in a mobile communication system.

BACKGROUND OF THE INVENTION The Code Division Multiple Access (CDMA) 2000 system not only provides voice services, but also provides fax services. With the widespread application of CDMA2000 systems, basic voice services or fax services can no longer meet the needs of users. Therefore, CDMA2000 systems need to be able to provide voice-to-fax services, that is, via voice to fax, and users are in the process of voice calls. You can send a fax with a convenient operation without having to re-fax the fax. For the voice-to-fax service, the mobile terminal (MS) needs to negotiate the air interface service with the base station controller (BSC) to complete the transition from voice service to fax service. For example, during a voice call, if a party to the voice callee wants to receive a fax, the receiver user presses the start button on the fax machine to initiate a voice-to-fax, or the sender user may press the button first. Here is an example for subsequent description. Clear, in fact, the receiver first button or the sender button, there is no special requirement. After the button is pressed, the mobile terminal at the fax receiving end detects the fax tone, and initiates the fax service negotiation of the air interface of the fax receiving end. On the other hand, the fax receiving end BSC instructs the BSC of the fax transmitting end to start voice-to-fax through the switching side, and the BSC of the fax transmitting end receives the instruction, and initiates the fax service negotiation of the air interface of the fax transmitting end. After the MSs at both ends and the respective BSCs respectively negotiate and pass, the voice service can be successfully transferred to the fax service. The basic fax service is divided into analog fax service and digital fax service. The fax protocol they implement is different. The wireless configuration such as the service option (SO) is different, such as analog fax SO is 20, 21, digital. The fax SO is 4101, 13. The so-called cross-protocol voice-to-fax refers to both sides of the fax, supporting analog fax while supporting digital fax. At this time, voice to fax, the success rate will be very low. As described above, when the BSC of the fax transmitting end initiates the fax service negotiation by voice to fax, the fax protocol supported by the MS at the fax transmitting end is unknown, and the wireless configuration used for initiating the negotiation with the MS fax service is determined by the BSC. The fax wireless configuration of the receiving end may be used. If the fax protocols implemented by the MSs at both ends are inconsistent, the transmitting MS will not accept the service if the wireless configuration carried in the local BSC negotiation request message is not supported. Negotiation, the result of the negotiation to the BSC, either directly refused, or even if the new wireless configuration is recommended, it will not be the fax configuration, because it is a voice call and there is no indication of the fax, the proposed new configuration is still wireless. The configuration will eventually fail to negotiate, causing the voice to fax to fail. In addition, for non-cross-protocol voice-to-fax, or the fax sender BSC does not use the fax wireless configuration of the receiving end to initiate the negotiation with the fax sender MS, and otherwise determines the fax implemented by the sender MS. In the case of an agreement, the possibility of negotiation failure still exists. Therefore, the risk of such negotiation is huge, and the failure rate of voice-to-fax will be high. To sum up, in the mobile communication system supporting the multi-protocol fax service, when implementing voice-to-fax, how to avoid inaccurate negotiation during cross-protocol switching and high failure rate becomes a technical problem to be solved.

SUMMARY OF THE INVENTION The technical problem to be solved by the present invention is to provide a system, method, and base station controller for implementing voice-to-fax communication across protocols, which are used to solve the problem of inter-protocol voice-to-fax service processing in an existing mobile communication system. The failure rate is high, and the problem of easy error is negotiated to improve the success rate of the cross-protocol voice-to-fax service. In order to solve the above problem, the present invention provides a method for implementing a cross-protocol voice-to-fax service, the method comprising: during a voice call between a first mobile terminal and a second mobile terminal, the first mobile terminal transmits a fax according to a voice Instructing to initiate a fax service negotiation to the first base station controller connected to the first mobile terminal, and after the negotiation is completed, transferring the fax service; the first base station controller sends the second base station controller connected to the second mobile terminal Voice to fax instructions; The second base station controller initiates a fax service negotiation to the second mobile terminal one by one according to the multiple fax protocols supported by the second base station controller, until the negotiation is successful, and the fax service is transferred to the fax service according to the mutually agreed fax protocol.

In the step of initiating a fax service negotiation with the first base station controller connected to the first mobile terminal, the first mobile terminal initiates a fax service negotiation to the first base station controller by using a wireless configuration that supports the fax protocol. . among them,

In the step of the second base station controller and the second mobile terminal initiating the fax service negotiation, the fax service negotiation is initiated from the plurality of fax protocols supported by the second base station controller to the second mobile terminal: The wireless configuration of the protocol is consistent with the wireless configuration of the fax protocol supported by the second mobile terminal, and then the fax service is transferred after the negotiation is completed; if not, the next remaining fax protocol is selected to continue the negotiation with the second mobile terminal. By analogy, until the negotiation is successful, the fax service is transferred to the fax service according to the fax agreement agreed by both parties. among them,

The fax protocol includes: an analog fax service protocol and/or a digital fax service protocol. among them,

The first mobile terminal is a calling end of a voice call, and the second mobile terminal is a called end of a voice call; or the first mobile terminal is a called end of a voice call, and the second mobile terminal is a voice call. Calling end. In order to solve the above problem, the present invention also provides a system for implementing a cross-protocol voice-to-fax service, the system comprising: a first mobile terminal and a first base station controller connected to the first mobile terminal, and a second mobile terminal and a second base station controller connected to the second mobile terminal; the first mobile terminal is configured to: in a voice call with the second mobile terminal, according to a language The instruction of the tone-to-send fax, the fax service negotiation is initiated to the first base station controller, and the fax service is transferred to the first base station controller; the first base station controller is configured to: perform fax service negotiation with the first mobile terminal, after the negotiation is completed. And transmitting, by the second base station controller, an indication of voice to fax; the second base station controller is configured to: initiate, according to the voice fax to the second mobile terminal, one by one according to the multiple fax protocols supported by the second base station controller Fax service negotiation until the negotiation is successful;

The second mobile terminal is configured to: perform a fax service negotiation with the second base station controller, until the negotiation is successful, and transfer the fax service according to the fax protocol agreed by both parties. The first mobile terminal is configured to initiate a fax service negotiation to the first base station controller in a wireless configuration that supports the fax protocol. among them,

The second base station controller is configured to initiate a fax service negotiation to the second mobile terminal one by one according to a plurality of fax protocols supported by the second base station controller as follows: multiple faxes supported from the second base station controller In the agreement, the second mobile terminal initiates a fax service negotiation; if the wireless configuration of the selected fax protocol is consistent with the wireless configuration of the fax protocol supported by the second mobile terminal, the fax service is transferred to the fax service; if not, the remaining The fax protocol further selects to continue to negotiate with the second mobile terminal, and so on, until the negotiation is successful, and the fax service is transferred to the fax service according to the agreed fax protocol. among them,

The first mobile terminal is a calling end of a voice call, and the second mobile terminal is a called end of a voice call; or The first mobile terminal is a called end of a voice call, and the second mobile terminal is a calling end of a voice call. In order to solve the above problem, the present invention also provides a base station controller for implementing a cross-protocol voice-to-fax service, which includes: a receiving module, configured to: when the base station controller is a first mobile-to-fax originator And receiving, by the terminal, the base station controller, when the first mobile terminal performs a voice call with the second mobile terminal of the voice-to-fax receiver, and according to the voice-to-fax indication, initiates the call to the base station controller. Fax service negotiation; when the base station controller is a base station controller accessed by the second mobile terminal, receiving an indication of a voice-to-fax sent by the base station controller accessed by the first mobile terminal; a negotiation module, setting When the base station controller is the base station controller that is accessed by the first mobile terminal initiated by the voice-for-fax, the first mobile terminal performs a fax service negotiation with the first mobile terminal, and after the negotiation is completed, the second mobile terminal is connected. The incoming base station controller sends an indication of voice to fax; when the base station controller is a base station controller accessed by the second mobile terminal And, according to the voice-to-fax instruction sent by the base station controller that is accessed by the first mobile terminal, initiate a fax service negotiation to the second mobile terminal one by one according to multiple fax protocols supported by the base station controller, until the negotiation is successful, so that The second mobile terminal transfers to the fax service according to a fax protocol negotiated by both parties. Wherein, when the base station controller is a base station controller accessed by the second mobile terminal, the base station controller is configured to follow the multiple fax protocols supported by the second base station controller one by one according to the following manner. The mobile terminal initiates the fax service negotiation: first, the fax service negotiation is initiated to the second mobile terminal from the multiple fax protocols supported by the base station controller; if the wireless configuration of the selected fax protocol is supported by the second mobile terminal If the wireless configuration of the fax protocol is consistent, the fax service will be transferred to the fax service if the negotiation is completed. If it is inconsistent, continue to negotiate with the second mobile terminal from the remaining fax protocol, and so on, until the negotiation is successful, according to the fax agreed by both parties. The agreement was transferred to the fax business. The fax protocol includes: an analog fax service protocol and/or a digital fax service protocol. The first mobile terminal is the calling end of the voice call, and the second mobile terminal is the called end of the voice call; or the first mobile terminal is the called end of the voice call, and the second mobile terminal is the voice The calling party of the call.

Compared with the prior art, the present invention proposes a solution that the fax service can be negotiated multiple times across protocols in voice-to-fax, which not only enables the receiving end of the fax and the mobile terminal of the transmitting end in the case of cross-protocol voice-to-fax, respectively. When the base station controller of the respective terminal performs the fax service negotiation, whether the service negotiation initiated by the mobile terminal or the service negotiation initiated by the base station controller, the success rate can be effectively guaranteed, and the success rate of the voice-to-fax without cross-protocol can be made. It has been improved to improve the success rate of the voice-to-fax service of the mobile communication system, especially for improving the success rate of the voice-to-fax service of the entire CDMA2000 system.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of a system and service negotiation for implementing cross-protocol voice-to-fax in an embodiment of the present invention; FIG. 2 is a flow chart of a mobile terminal (MS) initiating service negotiation when trans-protocol voice-to-fax is performed in an embodiment of the present invention; FIG. 3 is a flowchart of a base station controller (BSC) initiating service negotiation when trans-protocol voice-to-fax is performed in an embodiment of the present invention.

The preferred embodiments of the present invention are made to further clarify the objects, technical solutions, and advantages of the present invention. Further details are given. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other. The embodiments of the present invention are directed to the deficiencies of the prior art, and propose a cross-protocol voice-to-fax service processing scheme to improve the success rate of the cross-protocol voice-to-fax service, where the air interface fax service is switched from the voice service to the fax service. During the negotiation process, the fax service can perform multiple cross-protocol negotiations to ensure that the voice service is successfully switched to the fax service when the fax is cross-protocol. The problem of low cross-protocol voice-to-fax success rate caused by the defects of the prior art can be effectively solved, and the success rate of non-cross-protocol voice-to-fax is also improved significantly. FIG. 1 is a schematic diagram of a system and implementation steps for implementing a cross-protocol voice-to-fax service in an embodiment. The system for implementing the cross-protocol voice-to-fax service includes: a first mobile terminal MS1 and a first base station controller BSC1 connected thereto, a second mobile terminal MS2, and a second base station controller BSC2 connected thereto; During the voice call, the MS2 initiates a fax service negotiation to the BSC1 according to the voice-to-fax indication. The MS1 initiates a fax service negotiation with the BSC1 in the wireless configuration of the fax protocol. After the negotiation is completed, the fax service is transferred to the BSC2. Voice-to-fax indication; BSC2 initiates fax service negotiation to MS2 one by one according to the instructions of voice-to-fax, until the negotiation is successful, and the fax service is transferred to the fax service according to the fax protocol agreed by both BSC2 and MS2. The method for implementing the cross-protocol voice-to-fax service includes the following steps: Step 1. During the voice call, the MS of the calling party (remembered as MS1) detects the fax tone and obtains a voice-to-fax indication to the same end BSC. (Remarked as, BSC1) initiates fax service negotiation; Step 2: BSC1 instructs the other end of the BSC (denoted as BSC2) to initiate a voice-to-fax via the exchange side; Step 3: After the negotiation between MS1 and BSC1 is completed, the fax service is transferred; 4. After the BSC2 obtains the voice-to-fax indication through the switching side, select a wireless configuration corresponding to the fax protocol, and initiate a fax service negotiation to the same end MS (recorded as MS2); Step 5: MS2 finds that the fax wireless configuration initiated by BSC2 is consistent with the wireless configuration corresponding to the fax protocol implemented by itself, and then informs BSC2 to accept the negotiation, and proceeds to step 8. If not, go to step 6; Step 6, MS2 finds If the wireless configuration corresponding to the fax protocol initiated by the BSC2 is inconsistent with the wireless configuration corresponding to the fax protocol implemented by itself, the BSC2 is notified not to accept the negotiation, and the process proceeds to step 7. In step 7, the BSC2 selects the wireless configuration corresponding to another fax protocol, and again MS2 initiates fax service negotiation, and proceeds to step 8. Step 8. After the negotiation between BSC2 and MS2 is completed, the fax service is transferred.

Figure 2 shows the specific processing flow of the mobile terminal side that initiates the voice-to-fax service, including the following steps:

201. Establishing a voice service as one end of the voice call main callee;

202. During the voice call, the MS detects the fax tone, obtains a voice-to-fax instruction, and sends a fax service request message to the local BSC to propose a new fax service configuration (including the SO corresponding to the MS fax protocol);

203. After receiving the fax service request message, the BSC obtains a voice-to-fax instruction, and sends a handover indication message to the MS to guide the MS to switch from the current voice service to the fax service.

After receiving the handover indication message, the MS starts to switch from the voice service to the fax service, and sends a handover complete message to the BSC after completion. 205. After receiving the handover complete message, the BSC sends a service connection message to the MS, indicating that the BSC agrees to the new message. The fax service configuration, while instructing the MS to start using the new fax service configuration;

206. After receiving the service connection message, the MS sends a service connection completion message to the BSC, informing the BSC that the new fax service configuration is started, and the process ends.

Figure 3 shows the specific processing flow of the mobile terminal side in response to the voice-to-fax service, including the following steps: 301. Establish a voice service as one end of the voice call main callee;

302. After the BSC obtains the voice-to-fax instruction through the switching side, the BSC selects a wireless configuration corresponding to the fax protocol, sends a fax service request message to the local MS, and proposes a new fax service configuration; 303, the MS receives the fax. After the service request message, the wireless configuration carried in the message is judged. If the wireless configuration (including the SO, etc.) corresponding to the fax protocol implemented by the MS is inconsistent, the service response message is sent to the BSC, indicating that the new service configuration proposed by the BSC is not accepted. ;

304. After receiving the service response message, the BSC finds that the MS does not accept the proposed fax service configuration, and selects the wireless configuration corresponding to another fax protocol. For example, if the analog fax is selected for the first time, the negotiated digital fax is selected again. If the digital fax is selected for the first time, the negotiation analog fax is selected again, and the fax service request message is sent to the MS;

305. After receiving the fax service request message, the MS determines the wireless configuration carried in the message, and finds that the wireless configuration (including the SO and the like) corresponding to the fax protocol implemented by the MS is consistent, and sends a service response message to the BSC, indicating that the BSC is accepted. The proposed new service configuration; 306. After receiving the service response message, the BSC finds that the MS accepts the proposed fax service configuration, and sends a handover indication message to the MS to guide the MS to switch from the current voice service to the fax service.

307. After receiving the handover indication message, the MS starts to switch from the voice service to the fax service, and after the completion, sends a handover completion message to the BSC.

308. After receiving the handover complete message, the BSC sends a service connection message to the MS, indicating that the BSC agrees to the new fax service configuration, and instructs the MS to start using the new fax service configuration.

309. After receiving the service connection message, the MS sends a service connection completion message to the BSC, informing the BSC that the new fax service configuration is started, and the process ends.

The embodiment further provides a base station controller for implementing a cross-protocol voice-to-fax service, which includes: a receiving module, configured to: when the base station controller is accessed by a first mobile terminal of a voice-to-fax originator Receiving the first mobile terminal in receiving a fax-to-fax reception During the voice call of the second mobile terminal, the fax service negotiation initiated by the base station controller according to the voice to fax indication; when the base station controller is the base station controller accessed by the second mobile terminal Receiving an indication of a voice-to-fax transmission sent by the base station controller accessed by the first mobile terminal; and a negotiation module, configured to: when the base station controller is connected by the first mobile terminal initiated by the voice-to-fax The base station controller performs a fax service negotiation with the first mobile terminal, and after the negotiation is completed, sends an indication of the voice to fax to the base station controller accessed by the second mobile terminal; when the base station controller is the second mobile When the base station controller is connected to the terminal, according to the voice-to-fax instruction sent by the base station controller accessed by the first mobile terminal, the fax is initiated to the second mobile terminal one by one according to multiple fax protocols supported by the base station controller. The service is negotiated until the negotiation is successful, so that the second mobile terminal transfers to the fax service according to the mutually agreed fax protocol. among them,

When the base station controller is a base station controller that is accessed by the second mobile terminal, the base station controller is configured to move to the second one by one according to multiple fax protocols supported by the second base station controller as follows The terminal initiates the fax service negotiation: first, selecting one of the multiple fax protocols supported by the base station controller to initiate the fax service negotiation to the second mobile terminal; if the wireless configuration of the selected fax protocol and the fax protocol supported by the second mobile terminal If the wireless configuration is consistent, the fax service will be transferred after the negotiation is completed; if it is inconsistent, continue to negotiate with the second mobile terminal from the remaining fax protocols, and so on, until the negotiation is successful, according to the fax protocol agreed by both parties. Into the fax business. The fax protocol includes: an analog fax service protocol and/or a digital fax service protocol. The first mobile terminal is the calling end of the voice call, and the second mobile terminal is the called end of the voice call; or the first mobile terminal is the called end of the voice call, and the second mobile terminal is the voice Lord of the call One of ordinary skill in the art will appreciate that all or a portion of the above steps may be performed by a program to instruct the associated hardware, such as a read only memory, a magnetic disk, or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module unit in the foregoing embodiment may be implemented in the form of hardware, or may be implemented in the form of a software function module. The invention is not limited to any specific form of combination of hardware and software. The above is only the embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalents, improvements, etc., made within the spirit and scope of the invention are intended to be included within the scope of the appended claims.

INDUSTRIAL APPLICABILITY The present invention proposes a solution in which a fax service can be negotiated multiple times across protocols in a voice-to-fax manner, which not only enables the receiving end of the facsimile and the mobile terminal of the transmitting end to be controlled by the base station of the respective end in the case of cross-protocol voice-to-fax communication. When performing fax service negotiation, whether the service negotiation initiated by the mobile terminal or the service negotiation initiated by the base station controller, the success rate can be effectively guaranteed, and the success rate of the voice-to-fax without cross-protocol can be improved. Improve the success rate of the voice-to-fax service of the mobile communication system, especially for improving the success rate of the voice-to-fax service of the entire CDMA2000 system.

Claims

Claim

A method for implementing a cross-protocol voice-to-fax service, the method comprising: during a voice call between a first mobile terminal and a second mobile terminal, the first mobile terminal according to the voice-to-fax instruction a first base station controller connected to the mobile terminal initiates a fax service negotiation, and after the negotiation is completed, transfers the fax service; the first base station controller sends an indication of the voice to fax to the second base station controller connected to the second mobile terminal; The second base station controller initiates a fax service negotiation to the second mobile terminal one by one according to the multiple fax protocols supported by the second base station controller, until the negotiation is successful, and the fax service is transferred to the fax service according to the mutually agreed fax protocol.

The method according to claim 1, wherein in the step of initiating a fax service negotiation with a first base station controller connected to the first mobile terminal, the first mobile terminal is a wireless device that supports the fax protocol itself The configuration initiates fax service negotiation to the first base station controller.

3. The method according to claim 1, wherein the step of initiating the fax service negotiation between the second base station controller and the second mobile terminal is first selecting one of a plurality of fax protocols supported by the second base station controller The second mobile terminal initiates the fax service negotiation: if the wireless configuration of the selected fax protocol is consistent with the wireless configuration of the fax protocol supported by the second mobile terminal, the fax service is transferred after the negotiation is completed; if not, the remaining fax protocol is Alternatively, the second mobile terminal is negotiated, and so on, until the negotiation is successful, and the fax service is transferred according to the fax protocol agreed by both parties.

4. The method of claims 1 to 3, wherein the fax protocol comprises: an analog fax service protocol and/or a digital fax service protocol.

The method of claim 1, wherein the first mobile terminal is a calling end of a voice call, and the second mobile terminal is a called end of a voice call; or the first mobile terminal is a voice call. The called end, the second mobile terminal is the calling end of the voice call.

A system for implementing a cross-protocol voice-to-fax service, the system comprising: a first mobile terminal and a first base station controller connected to the first mobile terminal, a second mobile terminal, and a second mobile terminal The second base station controller is configured to: initiate a fax service negotiation to the first base station controller according to the voice-to-fax indication during the voice call with the second mobile terminal, and transfer the fax service after the negotiation is completed. ;

The first base station controller is configured to: perform fax service negotiation with the first mobile terminal, and after the negotiation is completed, send an indication of voice to fax to the second base station controller; the second base station controller is configured to: according to the voice transfer Instructing the fax to initiate the fax service negotiation to the second mobile terminal one by one according to the multiple fax protocols supported by the second base station controller, until the negotiation is successful;

The second mobile terminal is configured to: perform a fax service negotiation with the second base station controller, until the negotiation is successful, and transfer the fax service according to the fax protocol agreed by both parties.

7. The system of claim 6, wherein the first mobile terminal is configured to initiate a fax service negotiation with the first base station controller in a wireless configuration that supports the fax protocol itself.

8. The system according to claim 6, wherein the second base station controller is configured to initiate a fax service negotiation to the second mobile terminal one by one according to a plurality of fax protocols supported by the second base station controller as follows: Selecting one of a plurality of fax protocols supported by the second base station controller to the second mobile terminal Fax service negotiation; if the wireless configuration of the selected fax protocol is consistent with the wireless configuration of the fax protocol supported by the second mobile terminal, the fax service is transferred after the negotiation is completed; if not, the next fax protocol is selected and continues. The second mobile terminal performs negotiation, and so on, until the negotiation is successful, and the fax service is transferred to the fax service according to the fax protocol agreed by both parties.

9. The system of claims 6-8, wherein the fax protocol comprises: an analog fax service protocol and/or a digital fax service protocol.

The system of claim 6, wherein the first mobile terminal is a calling end of a voice call, and the second mobile terminal is a called end of a voice call; or the first mobile terminal is a voice call The called end, the second mobile terminal is the calling end of the voice call.

A base station controller for implementing a cross-protocol voice-to-fax service, comprising: a receiving module, configured to: when the base station controller is a base station controller accessed by a first mobile terminal of a voice-to-fax originator Receiving, by the first mobile terminal, a fax service negotiation initiated by the first mobile terminal to the base station controller according to an indication of voice-to-fax during a voice call with the second mobile terminal of the voice-to-fax receiver; When the controller is the base station controller accessed by the second mobile terminal, receiving an indication of the voice-to-fax sent by the base station controller accessed by the first mobile terminal; and the negotiation module is configured to: when the base station controller And performing a fax service negotiation with the first mobile terminal, and transmitting a voice transfer to the base station controller accessed by the second mobile terminal after the negotiation is completed. An indication of the fax; when the base station controller is a base station controller accessed by the second mobile terminal, according to the first mobile terminal accessing The base station controller sends an indication of the speech-to-fax, fax service negotiation initiated by one of the second plurality of mobile terminals according to the present facsimile protocol supported by the base station controller, until the successful negotiation, so that the The second mobile terminal transfers to the fax service according to the fax protocol agreed by both parties.

The base station controller according to claim 11, wherein, when the base station controller is a base station controller that is accessed by the second mobile terminal, the base station controller is configured to follow the And the plurality of fax protocols supported by the second base station controller initiates the fax service negotiation to the second mobile terminal one by one: first selecting one of the plurality of fax protocols supported by the base station controller to initiate the fax service negotiation to the second mobile terminal; The wireless configuration of the fax protocol is the same as the wireless configuration of the fax protocol supported by the second mobile terminal, and then the fax service is transferred after the negotiation is completed; if not, the next remaining fax protocol is selected to continue the negotiation with the second mobile terminal. Such a push, until the negotiation is successful, is transferred to the fax service according to the fax agreement agreed by both parties.

The base station controller according to claim 11 or 12, wherein the fax protocol comprises: an analog fax service protocol and/or a digital fax service protocol.

The base station controller according to claim 11, wherein the first mobile terminal is a calling end of a voice call, and the second mobile terminal is a called end of a voice call; or, the first mobile terminal is The called end of the voice call, and the second mobile terminal is the calling end of the voice call.