CN1303802C - Method for processing fax service - Google Patents
Method for processing fax service Download PDFInfo
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- CN1303802C CN1303802C CNB2004100884812A CN200410088481A CN1303802C CN 1303802 C CN1303802 C CN 1303802C CN B2004100884812 A CNB2004100884812 A CN B2004100884812A CN 200410088481 A CN200410088481 A CN 200410088481A CN 1303802 C CN1303802 C CN 1303802C
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Abstract
The present invention discloses a method for processing a fax service. After receiving EOP message sent by a transmitting fax machine, an IWF module responds MCF message to the transmitting fax machine, and meanwhile, the IWF module stores the EOP message locally and retransmits the EOP message to a receiving fax machine; then, an IWF waiting timer is started in order to wait for the MCF message returned by the receiving fax machine. After receiving DCN message transmitted by the transmitting fax machine, the IWF module does not retransmit the DCN message, but stores the DCN message in the IWF module; the IWF module retransmits the DCN message to the fax machine on a receiving end until receiving the MCF message transmitted by the receiving fax machine. The method has the advantage that the probability of not receiving the MCF message due to the overtime of the waiting timer of the transmitting fax machine is largely reduced, and thus, a communication error caused by too large time delay of transmission is overcome.
Description
Technical field
The present invention relates to facsimile art, refer to a kind of method of handling facsimile service especially.
Background technology
Facsimile is to utilize scanning and light-to-current inversion technology, and still images such as literal, picture, photo are sent to receiving end by making a start through wired or wireless channel, and reappears the communication mode of rest image in receiving end.Since the seventies in 20th century, owing to open the document facsimile business on public switched telephone network, facsimile has obtained greatly developing, and becomes people and transmits one of means of information.
Using facsimile by portable terminal is a business in the mobile communication system.The client can as the PCMCIA plug-in card, be called for short the PC card by the cellular data card after application, utilize the socket and the corresponding interface equipment fax sending and receiving of mobile phone.
In order in as mobile communication system such as CDMA2000, CDMA WLL, to support facsimile service, need be in base station (BS) or mobile switching centre (MSC) integrated interoperability function (IWF) module that is used for handling facsimile service specially.The IWF module be a kind of by with the state of network and customer service with protocol conversion or be mapped to consistent, thereby the device of the difference on shielding physical link and the network technology, the IWF module has been equivalent to the effect of a relaying to facsimile call signaling and transfer of data.Fig. 1 is prior art is handled facsimile service in mobile communication system a system configuration schematic diagram, and the IWF module can be integrated among the BS, also can be integrated among the MSC, because of specific implementation is decided.As can be seen from Figure 1, sending facsimile machine is connected with portable terminal, the machine of receiving faxes is connected with public switched telephone network (PSTN), and for facsimile machine, portable terminal, BS or MSC, IWF module and PSTN have constituted the bottom bearer channel of facsimile service.Fax standard on traditional fixed network is still followed in the control of point-to-point facsimile service itself and transmission between the facsimile machine, as ITU-T agreement T.30.
Fig. 2 is the facsimile service process chart of prior art in mobile communication system.Whole process comprises that call setup, file transmit and the release three phases, and the system configuration schematic diagram in conjunction with handling facsimile service in the mobile communication system of Fig. 1 specifically is achieved like this:
Step 200 is to step 201: finish call setup and file respectively and transmit, call setup is to reply by sending facsimile machine dialing and the machine of receiving faxes, and process connects on mobile radio communication and PSTN; File transmits and promptly finishes the process from the transmission facsimile machine to the machine of receiving faxes that needs to transmit data.T.30, this step is stipulated work according to ITU-T fully.
Step 202: after the transmission facsimile machine distributes the All Files page, send process to the IWF module and finish (EOP) message, start transmission facsimile machine waiting timer Tsender_wait_mcf then, suppose that the Tsender_wait_mcf duration is t.
Step 203:IWF module is transmitted to the machine of receiving faxes after receiving EOP message.
Step 204: the machine of receiving faxes is confirmed (MCF, Message Confirmation) message to IWF module return messages after receiving the next EOP message of IWF module forwards.
After step 205:IWF module was received the MCF message that the machine of receiving faxes sends, if it is not overtime to send facsimile machine waiting timer Tsender_wait_mcf, promptly in Tsender_wait_mcf duration t, the IWF module was given this forwards and is sent facsimile machine.
In this step, if the Tsender_wait_mcf timer expiry, promptly MCF message sends facsimile machine and just receives after duration t, then is mistaken as garble to occur.
Step 206: after the transmission facsimile machine is received MCF message, tear chain (DCN, Disconnect) message open to the transmission of IWF module;
Step 207:IWF module is transmitted to the machine of receiving faxes after receiving DCN message, thereby finishes a facsimile service.
From such scheme as can be seen, in step 202, after the transmission facsimile machine sends EOP message, can start the Tsender_wait_mcf timer, to wait for MCF message.In mobile communication system, the path of process is more between two facsimile terminals, as in system shown in Figure 1, need through portable terminal, eat dishes without rice or wine, BS or MSC, IWF module, PSTN etc., therefore protocol stack to be processed is also a lot, and the propagation delay time between two facsimile terminals has increased much compared with the fax time delay on the conventional fixed telephone network.This system time delay is to be difficult to shorten sometimes.
In step 205,, be garble so and be mistaken as because the influence of time delay when faxing in mobile system, sends facsimile machine and just can not receive MCF message before the Tsender_wait_mcf timer expiry.Though the facsimile machine that has can be retransmitted EOP message one time, the setting that sends facsimile machine timer Tsender_wait_mcf duration is to have configured when facsimile machine dispatches from the factory and unalterable, still can not receive MCF message at the appointed time.
In reality test, the stand-by period of just sending out existing facsimile machine and sending after the EOP message had only about 3 seconds, and from transmission EOP message to the propagation delay time of receiving the MCF message that the opposite end facsimile machine responds above 3 seconds.Sending facsimile machine because of timer expiry can't normally receive MCF message, is garble and be mistaken as.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method of handling facsimile service, and this method can solve the garble that causes too greatly because of propagation delay time.
For achieving the above object, technical scheme of the present invention specifically is achieved in that
A kind of method of handling facsimile service sends facsimile machine and transmits data by the IWF module between the machine with receiving faxes, and it is characterized in that after the transmission facsimile machine sent all data, this method may further comprise the steps:
The a.IWF module stores is from the EOP message that sends facsimile machine, and returns MCF message to sending facsimile machine;
The b.IWF module starts the IWF waiting timer after the machine of receiving faxes is transmitted the current EOP message of receiving;
If the c.IWF module receives from the DCN message that sends facsimile machine, it is stored in this locality; The IWF module judges whether to receive the MCF message from the machine of receiving faxes simultaneously, if receive, the IWF module stops the IWF waiting timer, enters step e; Otherwise enter steps d;
The d.IWF module judges whether the IWF waiting timer is overtime, if not overtime, returns step c; Otherwise enter step e;
The e.IWF module judges whether this locality stores DCN message, if DCN message has been stored in this locality, then will be stored in local DCN forwards and give the machine of receiving faxes; Otherwise respectively to sending facsimile machine and receiving faxes machine transmission DCN message.
Before step a, this method comprises that further the propagation delay time according to system's reality is provided with described IWF waiting timer duration.
Before the steps d, this method further comprises: the maximum number of starts of IWF waiting timer is set; If then the IWF waiting timer is overtime in the steps d, steps d further comprises: judge that whether the IWF waiting timer number of starts equals the maximum number of starts of timer, if equal, then enters described step e; Otherwise, return described step b.
Among the step c before the IWF module judges whether to receive MCF message from the machine of receiving faxes, step c further comprises: judge whether the IWF module is received from the EOP message that sends facsimile machine, and before receiving EOP message, do not received from the DCN message that sends facsimile machine, if, then store EOP message, and send MCF message to sending facsimile machine once more, enter the judgement of whether receiving then from the MCF message of the machine of receiving faxes; Otherwise directly enter the judgement of whether receiving from the MCF message of the machine of receiving faxes.
One end facsimile machine of this method is connected with portable terminal, and other end facsimile machine is connected with PSTN; Perhaps the two ends facsimile machine all is connected with portable terminal; Perhaps the two ends facsimile machine all is connected with PSTN.
As seen from the above technical solution, the inventive method is the release stage of handling at facsimile service, by IWF module stores and forwarding related news, after the IWF module is receiving from the EOP message that sends facsimile machine, the IWF module is responded MCF message to sending facsimile machine immediately, simultaneously the IWF module with the EOP message stores received in this locality, and transmit the EOP message that this is stored in the IWF module to the machine of receiving faxes, be provided with then and start IWF waiting timer Tiwf_wait_mcf, the MCF message of returning with the wait machine of receiving faxes.The IWF module receives from after the DCN message that sends facsimile machine, do not transmit at once but it is stored in the IWF module, and after receiving the MCF message that the machine of receiving faxes is sent, the IWF module just is transmitted to the receiving terminal facsimile machine to DCN.This method has reduced greatly to wait for that because of sending facsimile machine the Tsender_wait_mcf timer expiry does not receive the probability of MCF message, thereby has solved the garble that causes too greatly because of propagation delay time.
Description of drawings
Fig. 1 is prior art is handled facsimile service in mobile communication system a system configuration schematic diagram;
Fig. 2 is the facsimile service process chart of prior art in mobile communication system;
Fig. 3 is IWF module of the present invention discharges the stage at facsimile service a process chart;
Fig. 4 is the facsimile service process chart of the present invention in mobile communication system.
Embodiment
Core concept of the present invention is: the IWF module is after receiving from the EOP message that sends facsimile machine, respond MCF message to sending facsimile machine immediately, simultaneously the IWF module with the EOP message stores in this locality, and transmit this EOP message to the machine of receiving faxes, be provided with then and start IWF waiting timer Tiwf_wait_mcf, the MCF message of returning with the wait machine of receiving faxes.The IWF module can repeatedly be transmitted EOP message to the machine of receiving faxes, and the duration of Tiwf_wait_mcf can be provided with according to the propagation delay time of system's reality.The IWF module receives from after the DCN message that sends facsimile machine, do not transmit at once but it be stored in the IWF module, after receiving the MCF message that the machine of receiving faxes is sent, the IWF module just the DCN forwards to the receiving terminal facsimile machine.
To be IWF module of the present invention discharge the process chart in stage at facsimile service to Fig. 3, and concrete workflow is as follows:
Step 300:IWF module receives from after the EOP message that sends facsimile machine, and this message stores in this locality, and is sent MCF message to sending facsimile machine.
In this step, after the IWF module receives to send the EOP message that facsimile machine sends, directly return MCF message and give and send facsimile machine, like this by the IWF module, this process can be finished in sending facsimile machine timer Tsender_wait_mcf duration t, can not cause garble because of propagation delay time.
Step 301:IWF module sends to the machine of receiving faxes and is stored in local EOP message and starts IWF waiting timer Tiwf_wait_mcf, the MCF message of returning with the wait machine of receiving faxes.
The setting of Tsender_wait_mcf is to have configured when facsimile machine dispatches from the factory and unalterable in the prior art, and the duration of the Tiwf_wait_mcf among the present invention can reasonably be provided with according to the propagation delay time of reality, effectively avoid the garble that causes owing to propagation delay time, also guaranteed the operate as normal of the machine of receiving faxes simultaneously.
Step 304:IWF module judges whether to receive the EOP message from sending facsimile machine, if do not receive, then enters step 307; Otherwise, execution in step 305.
Here, step 304 to the processing of step 306 is a kind of abnormal protection processing modes, is in order effectively to prevent owing to eat dishes without rice or wine to retransmit the situation of EOP message under the abnormal conditions.If need not consider this special abnormal conditions, it can be omitted, can solve the problem that the present invention need solve equally.
Step 311:IWF module sends DCN message to the machine of receiving faxes.
Step 312: judge whether Tiwf_wait_mcf is overtime, if the not overtime step 302 of returning; Otherwise execution in step 313.
Step 313: judge that whether the Tiwf_wait_mcf number of starts reaches the maximum number of starts of permission, if do not reach, returns step 301; Otherwise return step 309.
In this step, the maximum number of starts of Tiwf_wait_mcf can be set, mainly be when not receiving the MCF message from the machine of receiving faxes in the IWF module, repeatedly return the chance of MCF message on the one hand the machine of receiving faxes, chance for the machine of receiving faxes has a maximum number of starts degree on the other hand, prevents that the IWF module from unrestrictedly waiting for.
From above-mentioned flow processing as can be seen, the IWF module is received from after the EOP message that sends facsimile machine, it is stored in this locality and returns MCF message to sending facsimile machine immediately, promptly finish corresponding storage and forwarding, can avoid some unnecessary mistakes of bringing owing to propagation delay time so to a great extent by the IWF module.And the IWF module is received and it is not transmitted to the machine of receiving faxes at once, but is stored in this locality from after the DCN message that sends facsimile machine, is transmitted to the machine of receiving faxes after the machine of receiving faxes returns MCF message again, has guaranteed the operate as normal of the machine of receiving faxes.
If the IWF waiting timer Tiwf_wait_mcf number of starts reaches n time and do not receive MCF message from the machine of receiving faxes, the IWF module will be stored in local DCN message and send to the machine of receiving faxes so, to finish the processing of a facsimile service; If still do not receive this moment from the DCN message that sends facsimile machine, then the IWF module is respectively to sending facsimile machine and the machine transmission DCN message of receiving faxes, to finish the processing of a facsimile service.That is, send the EOP message that facsimile machine is sent as long as the IWF module is received, the method by IWF module stores and forwarding related news of the present invention has just guaranteed the successful end in the stage that discharges, and has also promptly guaranteed the successful end of the processing procedure of once faxing.
For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing preferred embodiment that develops simultaneously, the present invention is described in more detail.
Fig. 4 is the present invention's facsimile service process chart in mobile communication system, it is n that but the IWF waiting timer Tiwf_wait_mcf number of starts is set here, the Tiwf_wait_mcf duration can be within the specific limits rationally be provided with according to the propagation delay time of system, is made as t1 here.Handle the system configuration schematic diagram of facsimile service in conjunction with Fig. 1 in mobile communication system, concrete steps are as follows:
Step 400 is to step 401: finish call setup and file transmission between the machine with receiving faxes sending facsimile machine.This step is fully according to ITU-T regulation work T.30.
Step 402: after the transmission facsimile machine distributes the All Files page, send EOP message to the IWF module, start transmission facsimile machine waiting timer Tsender_wait_mcf then, supposing to send facsimile machine waiting timer Tsender_wait_mcf duration is t.
Step 403: after the IWF module is received EOP message from the transmitting terminal facsimile machine, with the EOP message stores in this locality, and return MCF message to sending facsimile machine immediately, the IWF module sends to the receiving terminal facsimile machine and is stored in local EOP message simultaneously, start IWF waiting timer Tiwf_wait_mcf then, and note the Tiwf_wait_mcf timer number of starts.Here, suppose that IWF waiting timer Tiwf_wait_mcf duration is t1.
Step 404: after sending facsimile machine and receiving MCF message, send DCN message to the IWF module, the IWF module with the DCN message stores received in this locality.
Step 405: in IWF waiting timer Tiwf_wait_mcf duration t1, the IWF module does not receive the MCF message that the machine of receiving faxes returns, if this moment, the Tiwf_wait_mcf number of starts did not exceed the value of setting n, then the IWF module is retransmitted EOP message to the machine of receiving faxes, and restart IWF waiting timer Tiwf_wait_mcf, the Tiwf_wait_mcf number of starts is added one; Otherwise carry out next step.
Step 406: in the present embodiment, in next IWF waiting timer Tiwf_wait_mcf duration t1, IWF has received the MCF message that sends over from the machine of receiving faxes.
Step 407:IWF module is to the machine of receiving faxes and send facsimile machine transmission DCN information, thereby finishes the processing of a facsimile service.
From above job step as can be seen, the IWF module is separated control in the facsimile service processing release stage to sending facsimile machine and the machine of receiving faxes.The IWF module is responded MCF message at once after receiving from the EOP message that sends facsimile machine, and be transmitted to the transmission facsimile machine again after need not to receive by the time the MCF message that the machine of receiving faxes sends, thereby reduced greatly because of sending the probability that facsimile machine Tsender_wait_mcf timer expiry does not receive MCF message.Simultaneously, IWF wait and reception are from the MCF message of the machine of receiving faxes, and forwarding DCN message, have guaranteed the proper communication of the machine of receiving faxes.
In the foregoing description, send facsimile machine and be connected with portable terminal, the machine of receiving faxes is connected with PSTN, is connected with PSTN for sending facsimile machine, and the machine of receiving faxes is connected with portable terminal; Perhaps sending facsimile machine all is connected with portable terminal with the machine of receiving faxes; Perhaps sending facsimile machine all is connected with PSTN with the machine of receiving faxes; And various integrated IWF modules and realize that the communication system of facsimile service all is suitable for method of the present invention.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (5)
1, a kind of method of handling facsimile service sends facsimile machine and transmits data by the interoperability functional module between the machine with receiving faxes, and it is characterized in that after the transmission facsimile machine sent all data, this method may further comprise the steps:
A. the interoperability functional module is stored from the process end that sends facsimile machine, and to sending facsimile machine return messages acknowledge message;
B. the interoperability functional module starts interoperability function waiting timer after the machine of receiving faxes is transmitted the current process end of receiving;
If c. the interoperability functional module receives from what send facsimile machine and tears chain message open, it is stored in this locality; The interoperability functional module judges whether to receive the message authentication message from the machine of receiving faxes simultaneously, if receive, the interoperability functional module stops interoperability function waiting timer, enters step e; Otherwise enter steps d;
D. the interoperability functional module judges whether interoperability function waiting timer is overtime, if not overtime, returns step c; Otherwise enter step e;
E. the interoperability functional module is judged whether this locality stores and is torn chain message open, if this locality has been stored and torn chain message open, then will be stored in the local chain forwards of tearing open and give the machine of receiving faxes; Otherwise tear chain message to sending facsimile machine open with the machine transmission of receiving faxes respectively.
2, method according to claim 1 is characterized in that: before step a, this method comprises that further the propagation delay time according to system's reality is provided with described interoperability function waiting timer duration.
3, method according to claim 1 is characterized in that, before the steps d, this method further comprises: the maximum number of starts of interoperability function waiting timer is set;
If then interoperability function waiting timer is overtime in the steps d, steps d further comprises: judge that whether the interoperability function waiting timer number of starts equals the maximum number of starts of timer, if equal, then enters described step e; Otherwise, return described step b.
4, method according to claim 1, it is characterized in that, among the step c before the interoperability functional module judges whether to receive message authentication message from the machine of receiving faxes, step c further comprises: judge whether the interoperability functional module is received from the process end that sends facsimile machine, and before receiving the process end, do not received from what send facsimile machine and torn chain message open, if, storing process end then, and send message authentication message to sending facsimile machine once more, enter the judgement of whether receiving then from the message authentication message of the machine of receiving faxes; Otherwise directly enter the judgement of whether receiving from the message authentication message of the machine of receiving faxes.
5, method according to claim 1 is characterized in that: an end facsimile machine is connected with portable terminal, and other end facsimile machine is connected with PSTN; Perhaps the two ends facsimile machine all is connected with portable terminal; Perhaps the two ends facsimile machine all is connected with PSTN.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100884812A CN1303802C (en) | 2004-11-03 | 2004-11-03 | Method for processing fax service |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100884812A CN1303802C (en) | 2004-11-03 | 2004-11-03 | Method for processing fax service |
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| CN1770810A CN1770810A (en) | 2006-05-10 |
| CN1303802C true CN1303802C (en) | 2007-03-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100884812A Expired - Fee Related CN1303802C (en) | 2004-11-03 | 2004-11-03 | Method for processing fax service |
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| CN (1) | CN1303802C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100403762C (en) * | 2006-09-30 | 2008-07-16 | 华为技术有限公司 | Non-real time wireless fax system and method and fax server |
| CN101505354B (en) * | 2009-03-13 | 2011-04-20 | 中兴通讯股份有限公司 | Fax service implementing method, interconnection functional unit and terminal |
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| CN1201316A (en) * | 1997-06-03 | 1998-12-09 | 株式会社理光 | Communication control method and communication data terminal device using same |
| WO1998058492A2 (en) * | 1997-06-19 | 1998-12-23 | Cmr Communications Ltd. | A system and method for real-time facsimile transmission |
| US5877871A (en) * | 1994-02-09 | 1999-03-02 | International Mobile Satellite Organization | Communication method and apparatus |
| CN1298599A (en) * | 1998-04-23 | 2001-06-06 | 艾利森电话股份有限公司 | Method for improving transmission between terminals in a telecommunication system |
| CN1315108A (en) * | 1998-08-27 | 2001-09-26 | 艾利森电话股份有限公司 | Method for handling long delay in telecommunication system |
| US6411689B1 (en) * | 1998-08-17 | 2002-06-25 | Hughes Electronics Corporation | Facsimile call success rates in long delay environments |
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2004
- 2004-11-03 CN CNB2004100884812A patent/CN1303802C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5877871A (en) * | 1994-02-09 | 1999-03-02 | International Mobile Satellite Organization | Communication method and apparatus |
| CN1201316A (en) * | 1997-06-03 | 1998-12-09 | 株式会社理光 | Communication control method and communication data terminal device using same |
| WO1998058492A2 (en) * | 1997-06-19 | 1998-12-23 | Cmr Communications Ltd. | A system and method for real-time facsimile transmission |
| CN1298599A (en) * | 1998-04-23 | 2001-06-06 | 艾利森电话股份有限公司 | Method for improving transmission between terminals in a telecommunication system |
| US6411689B1 (en) * | 1998-08-17 | 2002-06-25 | Hughes Electronics Corporation | Facsimile call success rates in long delay environments |
| CN1315108A (en) * | 1998-08-27 | 2001-09-26 | 艾利森电话股份有限公司 | Method for handling long delay in telecommunication system |
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