CN101005400B - Report gateway service switching method - Google Patents
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- CN101005400B CN101005400B CN200610033208A CN200610033208A CN101005400B CN 101005400 B CN101005400 B CN 101005400B CN 200610033208 A CN200610033208 A CN 200610033208A CN 200610033208 A CN200610033208 A CN 200610033208A CN 101005400 B CN101005400 B CN 101005400B
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Abstract
New added event is defined in new H.248 packet or incurrent packet. Through Notify command defined in H.248 protocol, gateway informs gateway controller the new added event. In mode of gateway carrying out service switching controlled by the gateway controller, the event is in use for reporting gateway that a new type of service is received to let gateway controller know new type service more accurately so as to avoid carrying out analytical judging type of service from complicated signal combination by the gateway controller. Thus, risk caused by misjudge can be avoided. Based on the reportedtype of service, the gateway controller can arrange new capability. Under mode that gateway automatic switches type of service, the new event is in use for reporting change of service of gateway, andutilized attributes of RTP resources. Thus, gateway controller knows service state of gateway in order to satisfy charging requirement.
Description
Technical field
The present invention relates to next generation network (Next Generation Network is called for short NGN) technical field, more particularly, relate to the professional method of switching of a kind of report gateway (Media Gateway is called for short MG).
Background technology
Realize under the NGN framework in facsimile service, the modulation data service processes such as (Modem) that gateway generally reports gateway server (Media GatewayController is called for short MGC) by following dual mode with the business switching:
First kind, gateway reports gateway controller by the various signal tones that the variety of event (for example, signal tone V.21 and sign (being called for short V21flag) incident) that produces in the input incident that defines in the agreement H.248.2 and the reporting of user Fax/Modem/Text process sends the Fax/Modem/Text equipment of receiving.
In fact, signal tone itself can not be corresponding one by one with type of service, and some signal tones can be used for multiple business.H.248.2 mention in:, also need further logic to judge type of service according to these signal tones.So, needs gateway controller to analyze and judge type of service, and the indication gateway switches to this type of service according to these signal tones.
ITU-T V.152 in, though defined the professional flow process of gateway automatic switchover, do not need gateway controller to judge type of service by analyzing these signal tones, but, because this flow process is the decision logic of a more complicated, gateway may analyze different types of service with gateway controller.Therefore, this flow process can cause the type of service of charging and the actual type of service of using not to meet.And, because gateway had been analyzed type of service (in fact also having automatically switched to this business), allow gateway controller analyze one time more again and also there is no need.
In addition, above-mentioned this mode can't provide the quiet lotus type (payload type) of charging.
Second kind, real time transport protocol (the Real-time TransportProtocol of gateway by defining in the agreement H.248.1, abbreviation RTP) the pltrans incident of bag is wrapped RTP and is offered gateway controller, is used to notify the change of the carrying quiet lotus type that used RTP wraps.Like this, gateway controller just can recognize by this incident gateway switches to which kind of encoding and decoding (coding and decoding is called for short Codec).
Though also can only negotiate speech capability at call establishment stage.When fax or Modem business takes place, the reported event notification gateway controller of gateway by defining in the agreement H.248.2, gateway controller is analyzed these signals and is judged type of service, again carry out capability negotiation according to concrete type of service then, negotiate and be fit to these professional encoding and decoding, the business that gateway uses new ability to be correlated with.But, though this mode provides the variation of the quiet lotus type of chargeing, can't the reporting service type.
If use this mode of voice-band data (Voice-band Data is called for short VBD), Fax/Modern/Text also can switch to the Codec of VBD, still, but can not judge concrete type of service from payload type.
If use T.38 this mode, T.38 can use TCP mode or UDPTL mode, still, this dual mode does not all have quiet lotus type, so can't switch by reporting service yet.In addition, not IP but ATM does not have quiet lotus type to report yet if carrying uses.
In addition, if gateway uses the reporting events that defines in the agreement H.248.2 to give gateway controller, but sometimes gateway controller also is difficult to analyze concrete type of service. for example, the low speed Modem business, just directly send data after having sent ANS message, it is low speed Modem that gateway controller is difficult to judge, even because follow-up not dependent event reports. it is low speed Modem that gateway is judged, and does not also have ready-made reporting events to give gateway controller.
Have again,, therefore, can be used as the foundation of differentiated service type by the time interval between the signal because H.248.2 some signals that report in the agreement have sequential.But, need the follow-up signal of wait could determine type of service.If big time-delay appears in the H.248 communication between gateway and the gateway controller, then can cause the re-transmission of losing of reporting events, also can cause the erroneous judgement of type of service.
Summary of the invention
The technical problem to be solved in the present invention is, at the above-mentioned defective of prior art, provides a kind of method of report gateway service switching.
The technical solution adopted for the present invention to solve the technical problems is: construct the method that a kind of report gateway service switches, comprise that media gateway controller for controlling media gateway carries out professional switch mode and media gateway automatic switchover type of service pattern, carry out under the professional switch mode at media gateway controller for controlling media gateway, if media gateway receives new business, media gateway reports to Media Gateway Controller by first parameter of predeterminable event with the new business type; Under media gateway automatic switchover type of service pattern, if media gateway receives new business, media gateway reports to Media Gateway Controller by first parameter and second parameter of predeterminable event with new business type and business information; Wherein, described predeterminable event comprises following field:
Event name: the expression indicating services changes;
First parameter: the type of service that switches to of expression, comprise in voice, fax, modulation, text, the video one or more combination and one or more combination of the enciphered data of these types of service;
Second parameter: the code/decode type after expression is switched;
The 3rd parameter: the parameter that the encoding and decoding after expression is switched need remark additionally.
In method of the present invention, carry out under the professional pattern of switching at media gateway controller for controlling media gateway, comprise the following steps: a. at call establishment stage, carry out the capability negotiation of current business between the current calling and called media gateway, and set up current business; B. in carrying out current business,, then the new business type is reported to described Media Gateway Controller by described predeterminable event if media gateway receives new business; C. described Media Gateway Controller carries out new capability negotiation according to the described predeterminable event that receives between new calling and called media gateway, to realize the switching of current business to new business.
In method of the present invention, under the pattern of media gateway automatic switchover type of service, comprise the following steps: a. at call establishment stage, carry out all professional capability negotiations between the current calling and called media gateway, and set up current business; B. in carrying out current business, if media gateway receives new business, then switch to the ability that is used for new business that has consulted automatically, and new business type and business information are reported to described Media Gateway Controller by described predeterminable event.
In method of the present invention, further comprise after the described step b:
After new business finished, described media gateway automatically switched to original business, and by described predeterminable event original type of service and business information is reported to described Media Gateway Controller.
In method of the present invention, in described first parameter, type of service is described with the mode of enumerated list.
In method of the present invention, in described second parameter,, then list the tabulation that used all encoding and decoding are enumerated if type of service is used a plurality of encoding and decoding.
In method of the present invention, described predeterminable event is defined in the H.248 new bag or is defined in the existing bag.
In method of the present invention, described existing bag comprises ctyp bag H.248.2.
In method of the present invention, described business information comprises the attribute that uses the RTP resource, and this attribute comprises code/decode type and relevant parameters.
In method of the present invention, among the described step a, described all business comprise voice, fax, modulation and text services.
The invention has the beneficial effects as follows, under media gateway controller for controlling media gateway service switchover pattern, Media Gateway Controller can be understood new type of service more exactly, avoided the sets of signals merging analysis and judgement type of service of Media Gateway Controller to complexity, can avoid like this owing to the caused risk of erroneous judgement, and Media Gateway Controller can directly be consulted new ability according to the type of service of medium gateway to report; Under the media gateway automatic switchover business model, Media Gateway Controller can be understood the service condition of media gateway, satisfies the requirement of chargeing.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is that gateway of the present invention will increase the sequential chart that reporting events is given gateway controller newly;
To be the present invention carry out flow chart under the professional pattern of switching in the gateway controller control gateway to Fig. 2;
Fig. 3 is the flow chart of the present invention under the pattern of gateway automatic switchover type of service.
Embodiment
As shown in Figure 1, new H.248 bag or in existing bag the newly-increased incident (being the predeterminable event among Fig. 2,3) of definition, gateway by the Notify order that defines in the agreement H.248 with described newly-increased event notice gateway controller.Carry out under the professional pattern of switching in the gateway controller control gateway, this incident is used for the new business type that report gateway receives, gateway controller can be understood the new business type more exactly, avoided gateway controller the signal combination of complexity to be carried out the analysis and judgement of type of service, can avoid like this owing to the caused risk of erroneous judgement, and the type of service that gateway controller can directly report according to gateway is consulted new ability; Under gateway automatic switchover type of service pattern, this incident is used for the business change of report gateway and the RTP Resource Properties that uses, and gateway controller can be understood the service condition of gateway, satisfies the requirement of chargeing.
In above-mentioned, newly-increased incident (being the predeterminable event among Fig. 2,3) is used for the change of report gateway service, the encoding and decoding of switching back practicality and some of encoding and decoding and can be used for the information that gateway controller charges.Can be by new H.248 bag of definition, and in this bag the newly-increased incident ServiceInfo of definition, perhaps realize that at the newly-increased incident ServiceInfo of existing bag (for example ctyp bag H.248.2) this incident ServiceInfo specifically may be defined as:
Event name: ServCng, the expression indicating services changes;
First parameter: ServType, the type of service that switches to of expression, comprise in voice, fax, modulation, text, the video one or more combination and one or more combination of the enciphered data of these types of service.These types of service can be described by the mode of enumerated list;
Second parameter: CodecType, the code/decode type after expression is switched, if type of service is used a plurality of encoding and decoding, for example, video calling uses the encoding and decoding of video and speech simultaneously, can list the tabulation that used all encoding and decoding are enumerated so;
The 3rd parameter: CodecInfo, the encoding and decoding after expression is switched may need the parameter that remarks additionally, and for example, that T.38 use is UDPTL, RTP or TCP, and redundant, the configuring condition of error correction parameter.
Be that example describes switching by the predeterminable event report gateway service with above-mentioned two kinds of patterns below:
Carry out under the professional pattern of switching in the gateway controller control gateway, as shown in Figure 2, among the step S200, V.152 ITU-T provides the implementation method of VBD, at call establishment stage, carry out the capability negotiation of current business between current caller gateway and the called gateway, not only negotiate the encoding and decoding (for example, encoding and decoding G.729, G.711) that are used for voice, the encoding and decoding that also negotiate VBD simultaneously (for example, encoding and decoding are G.711), negotiation result comprises encoding and decoding, quiet lotus type, IP address and port.If necessary, also need negotiate RFC2198, RFC2733 and RFC2833 ability.Suppose that current business is speech business, the gateway controller control gateway is carried out the speech capability negotiation so, and sets up voice call.
Among the step S202, when gateway receives the signal that terminal sends, then this signal is analyzed, when analyzing concrete type of service when being new business (supposing that new business is facsimile service), gateway will report to gateway control (among the step S204) with new business type (being facsimile service) by the ServType parameter of ServCng incident.If do not receive new business, gateway can be proceeded voice call, and continues to detect whether receive new business.
Among the step S206, after gateway controller is received this incident, between caller gateway and called gateway, carry out new capability negotiation (capability negotiation of promptly faxing).Among the step S208,, then carry out new business and transmit when new capability negotiation finishes.Thereby realized switching from original business (being speech business) to new business (being facsimile service).Like this, gateway controller just can charge according to the parameter information that the ServCng incident is carried.
Under gateway automatic switchover type of service pattern, as shown in Figure 3, among the step S300, in calling out (being assumed to be audio call) establishment stage, carry out the capability negotiation of all business (be speech capability and be used for other business) between current caller gateway and the called gateway, comprise the capability negotiation that voice, modulation, fax and text etc. are professional.But current is to use speech capability to carry out voice call.
Among the step S302, when gateway receives the signal that terminal sends, then this signal is analyzed, when analyzing concrete type of service when being new business (supposing that new business is facsimile service), ability that consulted and that be used for new business (being facsimile service) before gateway will automatically switch to, ServType parameter and the CodecType parameter by the ServCng incident reports to gateway control (among the step S304) with new business type (being facsimile service) and business information (being the code/decode type that facsimile service uses) simultaneously.If do not receive new business, gateway is proceeded voice call, and continues to detect whether receive new business.
For example, in this encoding and decoding G.711, gateway controller receives this ServCng incident, does not need control gateway to carry out capability negotiation again.So, directly can utilize passage after the switching to carry out new business (being facsimile service) and transmit (among the step S306).Among the step S308, after new business (being facsimile service) finishes, gateway can automatically switch to original business (being speech business), and by the ServType parameter and the CodecType parameter of ServCng incident original type of service (being speech business) and business information (being the code/decode type that speech business is used) is reported to gateway control.Thereby realized from the switching of original business (being speech business)-new business (being facsimile service)-original business (being speech business).Like this, gateway controller just can charge according to the parameter information that the ServCng incident is carried.
In the implementation procedure of the present invention, operation to the report gateway service switching, the business that is not limited to speech business and facsimile service under two kinds of cited in above execution mode patterns is switched, the business that also can be other business is switched, and by predeterminable event the business switching is reported gateway controller as long as can realize gateway.
Claims (10)
1. the method that report gateway service switches comprises that media gateway controller for controlling media gateway carries out professional switch mode and media gateway automatic switchover type of service pattern, it is characterized in that,
Carry out under the professional switch mode at media gateway controller for controlling media gateway, if media gateway receives new business, media gateway reports to Media Gateway Controller by first parameter of predeterminable event with the new business type; Under media gateway automatic switchover type of service pattern, if media gateway receives new business, media gateway reports to Media Gateway Controller by first parameter and second parameter of predeterminable event with new business type and business information; Wherein, described predeterminable event comprises following field:
Event name: the expression indicating services changes;
First parameter: the type of service that switches to of expression, comprise in voice, fax, modulation, text, the video one or more combination and one or more combination of the enciphered data of these types of service;
Second parameter: the code/decode type after expression is switched;
The 3rd parameter: the parameter that the encoding and decoding after expression is switched need remark additionally.
2. method according to claim 1 is characterized in that, carries out comprising the following steps: under the professional pattern of switching at media gateway controller for controlling media gateway
A. at call establishment stage, carry out the capability negotiation of current business between the current calling and called media gateway, and set up current business;
B. in carrying out current business,, then the new business type is reported to described Media Gateway Controller by described predeterminable event if media gateway receives new business;
C. described Media Gateway Controller carries out new capability negotiation according to the described predeterminable event that receives between new calling and called media gateway, to realize the switching of current business to new business.
3. method according to claim 1 is characterized in that, under the pattern of media gateway automatic switchover type of service, comprises the following steps:
A. at call establishment stage, carry out all professional capability negotiations between the current calling and called media gateway, and set up current business;
B. in carrying out current business, if media gateway receives new business, then switch to the ability that is used for new business that has consulted automatically, and new business type and business information are reported to described Media Gateway Controller by described predeterminable event.
4. method according to claim 3 is characterized in that, further comprises after the described step b:
After new business finished, described media gateway automatically switched to original business, and by described predeterminable event original type of service and business information is reported to described Media Gateway Controller.
5. method according to claim 1 is characterized in that, in described first parameter, type of service is described with the mode of enumerated list.
6. method according to claim 1 is characterized in that, in described second parameter, if type of service is used a plurality of encoding and decoding, then lists the tabulation that used all encoding and decoding are enumerated.
7. method according to claim 1 is characterized in that, described predeterminable event is defined in the H.248 new bag or is defined in the existing bag.
8. method according to claim 7 is characterized in that, described existing bag comprises ctyp bag H.248.2.
9. method according to claim 4 is characterized in that, described business information comprises the attribute that uses the RTP resource, and this attribute comprises code/decode type and relevant parameters.
10. method according to claim 3 is characterized in that, among the described step a, described all business comprise voice, fax, modulation and text services.
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| CN200610033208A CN101005400B (en) | 2006-01-20 | 2006-01-20 | Report gateway service switching method |
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| CN200610033208A CN101005400B (en) | 2006-01-20 | 2006-01-20 | Report gateway service switching method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1533113A (en) * | 2003-03-20 | 2004-09-29 | 华为技术有限公司 | Method for detecting transmission link state by using medium gateway control protocol |
| CN1630325A (en) * | 2003-12-16 | 2005-06-22 | 华为技术有限公司 | Method for controlling fax and modulation demodulation in NGN |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1533113A (en) * | 2003-03-20 | 2004-09-29 | 华为技术有限公司 | Method for detecting transmission link state by using medium gateway control protocol |
| CN1630325A (en) * | 2003-12-16 | 2005-06-22 | 华为技术有限公司 | Method for controlling fax and modulation demodulation in NGN |
Non-Patent Citations (1)
| Title |
|---|
| ITU-T.V系列：电话网上的数据通信与其它网络互通 支持IP网上话音频带数据的程序.ITU-T V.152建议书.2005,7-9,19-21. * |
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