CN100450138C - Method for controlling fax and modulation demodulation in NGN - Google Patents
Method for controlling fax and modulation demodulation in NGN Download PDFInfo
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- CN100450138C CN100450138C CNB200310124105XA CN200310124105A CN100450138C CN 100450138 C CN100450138 C CN 100450138C CN B200310124105X A CNB200310124105X A CN B200310124105XA CN 200310124105 A CN200310124105 A CN 200310124105A CN 100450138 C CN100450138 C CN 100450138C
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Abstract
The present invention discloses a method for controlling a fax and a modulation and demodulation process in a next generation network. The method for controlling a fax and a modulation and demodulation process in a next generation network comprises the following steps: a gateway appliance reports a detected user event signal to soft exchange; the soft exchange judges the user event signal and particularly judges a CM signal and an ANS signal in a combined mode so as to accurately determine that a user event is the starting process of the fax or MODEM, a telephone channel between gateways is switched to T. 38 if the user event is the starting process of the fax, and the telephone channel between the gateways is switched to an MOIP mode if the user event is the starting process of MODEM.
Description
Technical field
The present invention relates to next generation network (NGN) technology, relate in particular to a kind of method of in the NGN network, reliably controlling fax and modulation.
Background technology
Under the NGN network, because voice carry by IP, there are factors such as time delay, compression, when carrying facsimile service or MODEM data service, can produce distorted signals and cause fax or MODEM failure.
For addressing this problem, relevant criterion is formulated and has been organized to set up T.38 and MOIP (MODEM OVER[P, i.e. carrying MODEM signal on IP network) standard, is applicable to upload to pass at IP network to state application.Use the gateway that this standard just requires in the NGN network carrying and service detach, and want and in normal voice call, to detect fax or MODEM signal, and to report soft switch, thereby start T.38 or the flow process of MOIP.
The signal that can identify fax has: CNG single-tone, CED, V21 FLAG, the fax in the CM signal, data indications (only high-speed facsimile support).
Can identify having of MODEM: ANS (identical) with CED or/the ANS ANS of phasing back (band), the fax in the CM signal, data indication (only high speed MODEM supports).
Detection control master to facsimile signal and MODEM in the prior art has following two kinds of schemes:
Scheme one: gateway detects any signal, promptly thinks fax or MODEM to occur, immediately the IP of voice channel is connected G.711 encoding and decoding, transparently-transmitted fax or the MODEM signal that is converted to lossless compress.
This scheme can't embody the requirement at different aspects such as redundancy packet, JITTERBUFFER of fax, MODEM, and can't use and T.38 wait agreement for what fax was formulated specially.
Scheme two: gateway is promptly thought fax after detecting the CNG single-tone, and detects other arbitrary signals earlier, promptly thinks MODEM.
Because the CNG sound is a single-tone, be used to point out telefax to begin, this audio frequency is comparatively general, and the also existence in some MODEM of CNG single-tone, surveys so this scheme is easy to generate flase drop.For example under the experimental situation, whistle taking place sometimes be detected as the CNG single-tone, causes speech channel to be interrupted.
Summary of the invention
The object of the present invention is to provide a kind of method of in the NGN network, controlling fax and modulation, to solve in the prior art because of not judging accurately that there are the not high problem of quality of service in facsimile signal and MODEM signal.
Realize technical scheme of the present invention:
A kind of method of in the NGN network, controlling fax and modulation, described NGN network comprises the soft switch of key-course face and the gateway of access aspect; The method comprising the steps of:
Gateway device reports detected customer incident signal to soft switch;
Soft switch is judged the customer incident signal:
If this customer incident signal is the CM signal, then further judge the parameter of indication business datum in this CM signal,, this parameter determines customer incident if being designated as data DATA for starting modem, if be designated as fax FAX then determine that customer incident is for starting fax;
If this customer incident signal is ANS or CED signal, then further judge whether to receive the CNG signal, if determine that then customer incident is the startup fax, otherwise determine that customer incident is for starting MODEM;
Soft switch is switched speech channel between the gateway according to customer incident, if customer incident is for starting fax then T.38 the speech channel between the gateway is switched to, if customer incident is for starting MODEM then the speech channel between the gateway is switched to the MOIP mode.
If described customer incident signal is the V21FLAG signal, determine that then customer incident is for starting fax.
If described customer incident is the ANS signal of signal band phasing back, determine that then customer incident is for starting MODEM.
The present invention prevents to fail to report by the reliable judgement to fax and MODEM, misrepresents deliberately, thereby allows the better present traditional voice service of carrying of NGN.
Description of drawings
Fig. 1 is a NGN network architecture schematic diagram;
Fig. 2 is a flow chart of the present invention.
Embodiment
Consult shown in Figure 1ly, under the NGN framework, the gateway of the soft switch of control aspect and access aspect is separated.Soft switch is by packet oriented protocol, and control gateway is finished continuing of calling, the foundation of Media Stream (speech, video).Under standard N GN framework, the Media Stream between the gateway also is based on packet network, be different under the traditional PSTN based on time division circuit carrying.
When the user of band under the gateway started fax or MODEM in conversation, gateway must detect corresponding event, and reports soft switch.T.38 or MOIP (MODEM OVER IP promptly carries the MODEM signal on IP network) mode the soft switch meeting is MODEM or fax according to certain rule judgment, and further switches IP speech channel between the gateway for.
Consult shown in Figure 2ly, handling process of the present invention is as follows:
Step 10: gateway device reports detected customer incident signal to soft switch.
Step 20: soft switch is judged the customer incident signal:
If this customer incident signal is the CM signal, then carry out step 30;
If this customer incident signal is ANS or CED signal, then carry out step 40;
If this customer incident is the V21FLAG signal, determine that then customer incident is for starting fax and going on foot 50;
If this customer incident is that (promptly/ANS) signal determines that then customer incident is for starting MODEM and carry out step 60 to the ANS that is with phasing back.
Step 30: the parameter of judging indication business datum in this CM signal,, this parameter determines customer incident if being designated as data (DATA) for starting modulator-demodulator (MODEM) and carry out step 60, if be designated as fax (FAX) then determine that customer incident faxes and carry out step 50 for starting.
DATA is a parameter of CM signal.This parameter can be TEXT, DATA, FAX.DATA identification data business, FAX is expressed as fax.
Step 40: judge whether to receive the CNG signal,, otherwise determine that customer incident is to start MODEM and carry out step 60 if then definite customer incident is for the startup fax and carry out step 50.
Step 50: the user starts fax, and soft switch switches to T.38 mode with the speech channel between the gateway.
Step 60: the user starts MODEM, and soft switch switches to the MOIP mode with the speech channel between the gateway.
In the present invention, require gateway can detect V21, CM, ANS and, the CED signal.Because the DSP reason if gateway can't guarantee to detect this type of incident, then is modeled as V21 by gateway with CNG and reports, and, be used as CM (DATA) and report other signals of thinking MODEM.To guarantee unified interface to soft switch.
Claims (3)
1, a kind of method of in next generation network, controlling fax and modulation, described NGN network of future generation comprises the soft switch of key-course face and the gateway of access aspect; It is characterized in that the method comprising the steps of:
Gateway device reports detected customer incident signal to soft switch;
Soft switch is judged the customer incident signal:
If this customer incident signal is the CM signal, then further judge the parameter of indication business datum in this CM signal,, this parameter determines customer incident if being designated as data DATA for starting modem, if be designated as fax FAX then determine that customer incident is for starting fax;
If this customer incident signal is ANS or CED signal, then further judge whether to receive the CNG signal, if determine that then customer incident is the startup fax, otherwise determine that customer incident is for starting MODEM;
Soft switch is switched speech channel between the gateway according to the customer incident signal, if customer incident is for starting fax then T.38 the speech channel between the gateway is switched to, if customer incident is for starting MODEM then the speech channel between the gateway is switched to the MOIP mode.
2, the method for claim 1 is characterized in that, if described customer incident signal is the V21FLAG signal, determines that then customer incident is for starting fax.
3, method as claimed in claim 1 or 2 is characterized in that, if described customer incident signal is the ANS signal of band phasing back, determines that then customer incident is for starting MODEM.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200310124105XA CN100450138C (en) | 2003-12-16 | 2003-12-16 | Method for controlling fax and modulation demodulation in NGN |
| US10/554,958 US20060285171A1 (en) | 2003-11-28 | 2004-11-08 | Method of performing fax in next generation network |
| PCT/CN2004/001266 WO2005053232A1 (en) | 2003-11-28 | 2004-11-08 | A method of performing fax in the next generation network |
| BRPI0408860-3A BRPI0408860A (en) | 2003-11-28 | 2004-11-08 | Method for Implementing Next-Generation Network Fax Services |
| RU2005129326/09A RU2005129326A (en) | 2003-11-28 | 2004-11-08 | METHOD FOR FAX IMPLEMENTATION IN THE NEXT GENERATION NETWORK |
| AU2004310476A AU2004310476A1 (en) | 2003-11-28 | 2004-11-08 | A method of performing fax in the next generation network |
| HK05110801.3A HK1079018A1 (en) | 2003-12-16 | 2005-11-28 | A method for controlling facsimile and modem in next generation network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200310124105XA CN100450138C (en) | 2003-12-16 | 2003-12-16 | Method for controlling fax and modulation demodulation in NGN |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1630325A CN1630325A (en) | 2005-06-22 |
| CN100450138C true CN100450138C (en) | 2009-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200310124105XA Expired - Lifetime CN100450138C (en) | 2003-11-28 | 2003-12-16 | Method for controlling fax and modulation demodulation in NGN |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN100450138C (en) |
| HK (1) | HK1079018A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100366043C (en) * | 2005-08-26 | 2008-01-30 | 华为技术有限公司 | Low-speed modulation/demodulation and fax service recognizing and switching method |
| CN101005400B (en) * | 2006-01-20 | 2010-05-12 | 华为技术有限公司 | Report gateway service switching method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1222285A (en) * | 1996-06-20 | 1999-07-07 | 艾利森电话股份有限公司 | Connecting telephones, faxmachines and computers in intelligent network |
| CN1441337A (en) * | 2002-02-27 | 2003-09-10 | 英业达股份有限公司 | Automatic facscimile management system and method |
| US20030193696A1 (en) * | 2002-01-24 | 2003-10-16 | Dominic Walker | Voice and fax over IP call establishment in a communications network |
-
2003
- 2003-12-16 CN CNB200310124105XA patent/CN100450138C/en not_active Expired - Lifetime
-
2005
- 2005-11-28 HK HK05110801.3A patent/HK1079018A1/en not_active IP Right Cessation
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1222285A (en) * | 1996-06-20 | 1999-07-07 | 艾利森电话股份有限公司 | Connecting telephones, faxmachines and computers in intelligent network |
| US20030193696A1 (en) * | 2002-01-24 | 2003-10-16 | Dominic Walker | Voice and fax over IP call establishment in a communications network |
| CN1441337A (en) * | 2002-02-27 | 2003-09-10 | 英业达股份有限公司 | Automatic facscimile management system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1630325A (en) | 2005-06-22 |
| HK1079018A1 (en) | 2006-03-24 |
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