CN1889566B - Resource requesting method of business layer to transmitting layer in next generation network - Google Patents
Resource requesting method of business layer to transmitting layer in next generation network Download PDFInfo
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- CN1889566B CN1889566B CN2006100053409A CN200610005340A CN1889566B CN 1889566 B CN1889566 B CN 1889566B CN 2006100053409 A CN2006100053409 A CN 2006100053409A CN 200610005340 A CN200610005340 A CN 200610005340A CN 1889566 B CN1889566 B CN 1889566B
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Abstract
A method for transmitting request resource from service layer to transmission layer in next generation network includes adding refusal reason and helping to regulate resource request information when resource distribution request of service layer device is refused by transmission layer device, regulating resource to be requested by service layer device according to newly added information in response message and consulting with CPE protocol if it is necessary then reissuing request, reporting current resource state to service layer device by transmission layer device and deciding to regulate resource requirement or not by service layer device according to current resource state when session is set up.
Description
Technical field
The present invention relates to next generation network technology, particularly in the next generation network operation layer to the method for transport layer request resource.
Background technology
Next generation network (Next Generation Network is called for short " NGN ") is a milestone of telecommunication history, and it indicates the arrival in new generation telecommunication network epoch.Angle from development, NGN is from traditional public switched telephone network based on circuit switching (Public Switched TelephoneNetwork, abbreviation " PSTN ") stepped gradually to paces in based on packet switching, it has carried all business of original PSTN network, great amount of data transmission is unloaded to internetworking agreement (Internet Protocol, be called for short " IP ") in the network to alleviate the heavy burden of PSTN network, the new features with the IP technology increase and have strengthened many old and new's business again.
In this sense, NGN is based on time division multiplexing (Time DivisionMultiplexing, be called for short " TDM ") the PSTN speech network and the product that merges based on the packet network of internetworking agreement/asynchronous transfer mode (IP/ATM), it makes that integrated services such as voice, video, data become possibility on new generation network.
At present, ITU Telecommunication Standardization Sector (International Telecommunication UnionTelecommunication Standardization Sector, be called for short " ITU-T ") and be used for the telecommunications of advanced networks and business and agreement (Telecommunications and Internetconverged Services and Protocols for Advanced Networking) that the internet merges are organized all at the following NGN network of network framework of formulation as telecommunication standard international and Europe respectively.As shown in Figure 1, the network architecture of NGN generally speaking can be divided into operation layer and transport layer two big levels.
Operation layer is mainly finished such as internet protocol multimedia subsystem (IP Multimedia Subsystem, abbreviation " IMS "), public switched telephone network (Public Switched Telephone Network, be called for short " PSTN ")/integrated services digital network (Integrated Services Digital Network, the service control function of various application such as emulation abbreviation " ISDN "), Streaming Media, and miscellaneous service is provided.
Transport layer is mainly finished user's the network insertion and the transmitting function of diverse network message.The function that transport layer is finished can be subdivided into resource admission control function (Resource Admission ControlFunctions again, abbreviation " RACF "), network insertion attached function (Network Access AttachmentFunctions is called for short " NAAF "), transmitting function three parts.Wherein, NAAF mainly finishes the network configuration of Certificate Authority, address assignment, the management of user's accessing position information and the terminal of network access layer; Transmitting function is mainly finished the transmission of various information under the control of above-mentioned subsystem; RACF mainly finishes control, distribution, the management function of bearer network resource based on business demand, guarantee professional service quality.
Next highlight RACF.
RACF is used to be implemented in the arbitration function of carrying out resource negotiation and distribution between operation layer and the transport layer, and its position in the whole framework of NGN as shown in Figure 2.In the ITU-T normal structure, the major function of RACF is the QoS control such as resource reservation, access control and gate, wherein, access control refers to can determine whether authorized user inserts with situation etc. according to user's subscription data with based on the policing rule of operator and Internet resources.Another major function of RACF is that NAPT/FW passes through control.
The correlation of each functional entity among the NGN is described below with reference to Fig. 2.At first, service control function and RACF carry out information interaction and finish professional resource control at the NGN transport layer; The second, CPE and service control function and transmitting function realize resource request and negotiation functionality alternately; The 3rd, RACF and transmitting function realize packet filtering alternately, information classification, mark and policing rule, and RSVP and distribution, the network address port conversion, the IP address anti-spoofing, NAT/FW passes through, and uses functions such as metering; The 4th, RACF and NAAF check user's CAMEL-Subscription-Information alternately; The 5th, the part that service control function and NAAF obtain the user alternately inserts information such as CAMEL-Subscription-Information, on-position (access device sign and line identification), access authentication result.
In ITU-T and TISPAN relevant criterion, service control function and RACF realize the resource control of customer service at transport layer alternately, should realize alternately by Gq ' interface, just realize on the interface between the strategy decisive function PDF among session control agent functionality in service control function (Session Control Proxy Function is called for short " SCPF ") and the RACF.Fig. 3 illustrates Gq ' interface position.Persons skilled in the art know that all interfaces all are Gq ' interfaces between service control function and the PDF.
The following describes in the prior art session and set up the method for request resource in the process.
At first, operation layer can be according to service request from user, the required resource of decision session; Also can obtain the required resource that determines by CPE by expansion of application layer signaling or special application layer resource signaling according to CPE.
After this, initiate resource request by the PDF of SCPF in RACF.
Then, PDF is according to the subscription data of user in NAAF, determines whether that based on the policing rule and the existing resource situation of operator authorization resources uses.
At this moment, if determine to authorize, RACF will send orders such as gate, bag label and medium control to transmitting function, send the resource admission message by PDF to service control function simultaneously.If determine not authorize, then send refuse information to service control function.
In actual applications, there is following problem in such scheme: in case unsuccessful, then set up and get nowhere, and influences session and be created as power by whole session to the transport layer request resource for operation layer.
Cause the main cause of this situation to be, at service control function after the RACF request resource, only return request and be accepted or rejected two states to service control function, do not report Reason For Denial and relevant help service control function to adjust information such as conventional network resources situation, the CAMEL-Subscription-Information of user in NAAF etc. of resource request, in this case, service control function can not adjusted resource request once more, but directly removes session, and it is not high to cause session to be created as power.。
Summary of the invention
In view of this, main purpose of the present invention is to provide in a kind of next generation network operation layer to the method for transport layer request resource, makes operation layer improve to the success rate of transport layer request resource.
For achieving the above object, the invention provides that operation layer comprises following steps to the method for transport layer request resource in a kind of next generation network:
When the A session was set up, operation layer equipment was to transport layer device request Resources allocation;
If the described transport layer equipment of B uses through decision-making refusal authorization resources, then send response message to described operation layer equipment, wherein comprise the information that resource request is adjusted in Reason For Denial and/or help;
The described operation layer equipment of C is according to the information of Reason For Denial in the described response message and/or help adjustment resource request, again to transport layer device request Resources allocation.
Wherein, also comprise following steps:
Session if described transport layer device discovery conventional network resources situation is not enough to support described session, then can report the conventional network resources situation to described operation layer equipment after setting up.
In this external described method, described operation layer equipment can be service control function or professional control and application subsystem.
In this external described method, described transport layer equipment can be resource admission control function or resource admission control subsystem.
In this external described method, among the described step B, described resource admission control function is according to the subscription data of user in the network insertion attached function, whether authorization resources uses based on the policing rule of operator and the decision-making of existing resource situation.
In this external described method, described step B also comprises following substep:
If described resource admission control function uses through the decision-making authorization resources, then send gate, bag label and medium control command to transmitting function, send the response message of resource access success simultaneously to service control function by strategy decision function.
In this external described method, described Reason For Denial and the information that helps to adjust resource request can comprise one of following information or its combination:
Conventional network resources situation, the CAMEL-Subscription-Information of user in the network insertion attached function.
In this external described method, described conventional network resources situation comprises one of following information or its combination:
The business-level information that the present available bandwidth of network, network can be served.
In this external described method, described operation layer equipment is according to the described response message that receives, remove session, or adjust the information of resource request according to described help, after the resource that former request is distributed is adjusted again to described transport layer device request Resources allocation.
In this external described method, described operation layer equipment is removed session according to the described conventional network resources situation that receives, or corresponding resource requirement adjustment is carried out in described session.
In this external described method, the resource that described operation layer equipment distributes request also can comprise the substep of holding consultation with the customer premises equipment, CPE of initiating described session when adjusting.
In this external described method, described next generation network meets the standard of ITU Telecommunication Standardization Sector or is used for the telecommunications of advanced networks and business and the consensus standard that the internet merges.
The present invention provides also that operation layer comprises following steps to the method for transport layer request resource in a kind of next generation network:
After session was set up, described transport layer equipment reported the conventional network resources situation to described operation layer equipment;
The resource situation that described operation layer equipment reports according to described transport layer equipment, whether decision is carried out corresponding resource requirement adjustment or is removed session connection described session.
By relatively finding, the main distinction of technical scheme of the present invention and prior art is, in the first string, transport layer equipment is when the resource allocation request of refusal operation layer equipment, in response message, increase Reason For Denial and help operation layer equipment to adjust the information of resource request, for example conventional network resources situation, the user signatory resource information in NAAF etc.; Operation layer equipment, needs to consult with CPE to wanting requested resource adjustment according to information newly-increased in the response message in case of necessity, after this initiates request again.
In second scheme, after session was set up, transport layer equipment can report current resource situation to operation layer equipment, and operation layer equipment determines whether to carry out the resource requirement adjustment in view of the above or removes session connection.
One of above-mentioned two scheme are used for session when setting up, one be used for session and set up after, but all be based on the design that Gq ' interface is expanded, can use separately also and can unite use.
Difference on this technical scheme, brought comparatively significantly beneficial effect, that is, because operation layer equipment can adjust to resource request next time in the zone of reasonableness according to information newly-increased in the response message, so probability of successful improves greatly in request next time.A typical example is that CPE passes through service control function (operation layer equipment) to RACF (transport layer equipment) request resource according to the ability of self, but behind the user signing contract information among the RACF inquiry NAAF, find that this user does not have authority to use so many resources, so refusal.If according to prior art, service control function can direct dismantling call.And according to the solution of the present invention, RACF can be in response message with on user's signatory resource information, service control function can be adjusted to requested resource quantity in the signatory resource information scope of user like this, once success is created as power thereby help improving session next time when asking.
Because operation layer equipment can in time be known the variation of current resource situation, thus can make corresponding adjustment to the resource requirement of already-existing session, thus session can not interrupted easily when the unexpected anxiety of resource.
Description of drawings
Fig. 1 is a NGN network architecture schematic diagram;
Fig. 2 is the RACF position view among the NGN;
Fig. 3 is the Gq ' interface schematic diagram among the NGN;
Fig. 4 be among the NGN according to an embodiment of the invention operation layer to the method signaling process schematic diagram of transport layer request resource.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
Generally speaking, principle of the present invention is, when session is set up, if the resource of transport layer equipment refusal operation layer equipment is used, then feeds back the response message that comprises Reason For Denial and help to adjust the information of resource request to this operation layer equipment.In this case, because operation layer equipment can be adjusted to resource request next time in the zone of reasonableness according to information newly-increased in the response message, improved probability of successful in request next time greatly.In addition, the present invention is after session is set up, transport layer equipment can further report current resource situation to operation layer equipment, make operation layer equipment can in time know the variation of current resource situation, so can make corresponding adjustment to the resource requirement of already-existing session, thereby session can not interrupted easily when the unexpected anxiety of resource.
Next operation layer is described among the NGN of one embodiment of the present of invention to the method for transport layer request resource.Need to prove that in the present embodiment, operation layer equipment is service control function, transport layer equipment is RACF, but is not limited thereto, in other embodiments of the invention, operation layer equipment can be professional control and application subsystem, and transport layer equipment can be resource admission control subsystem.And NGN meets standard or " TISPAN " standard of ITU Telecommunication Standardization Sector.
Be to relate among clear outstanding the present invention the request resource mode under the refusal authorization conditions, therefore, present embodiment be divided into transport layer device authorization resource is used and two kinds of situations of transport layer equipment refusal authorization resources use describe.At first, the situation when the refusal authorization resources uses is described with reference to Fig. 4.
As shown in Figure 4, when session is set up, send service request (or resource request) to service control function at step 401:CPE.
After this, in step 402: operation layer determines the required resource of session according to service request, and asks Resources allocation to RACF.Specifically, referring to Fig. 3, this step is realized by the SCPF in the service control function.
Then, at step 403:RACF according to the subscription data of user in the network insertion attached function, based on the policing rule of operator, and existing resource situation, making a strategic decision, whether authorization resources uses, and, respond to the request of service control function feedback resources according to the result of decision.This response can be to accept or refusal.If refusal is authorized, then expand Gq ' interface.Specifically, RACF sends response message to service control function, comprises the Reason For Denial value in this response message and helps service control function to adjust the information of resource request.In the present invention, the information of Reason For Denial and help adjustment resource request can comprise one of following information or its combination in any: conventional network resources situation, the CAMEL-Subscription-Information of user in the network insertion attached function.Wherein, the conventional network resources situation further comprises: business-level information that the present available bandwidth of network, network can be served or the like.
Then, in step 404: after service control function is received the response message of RACF,, directly institute's requested resource is adjusted, made it in the available resource scope according to the information that comprises in this message.Can understand, owing to be in course of adjustment, the Reason For Denial value arranged and help information that service control function adjusts resource request as a reference, it is higher to adjust accuracy rate.
Then, in step 405: service control function is initiated resource request to RACF again through after the resource of service request is adjusted.
Subsequently, at step 406:RACF once more according to the subscription data of user in the network insertion attached function, based on the policing rule of operator, and existing resource situation, making a strategic decision, whether authorization resources uses.Because in step 404, service control function is adjusted required resource according to the information in the response message, it is in the available resource scope, therefore in this step, RACF will determine authorization resources to use, and send the resource admission message by strategy decision function to service control function.
Situation when having illustrated that with reference to Fig. 4 RACF refusal authorization resources uses in the method for request resource of the present invention above.Situation when following brief description RACF authorization resources uses.When carrying out step 403 from step 401, RACF is according to the subscription data of user in the network insertion attached function, based on the policing rule of operator, and existing resource situation, when the decision authorization resources uses, RACF sends gate, bag label and medium control command to service control function, sends the resource admission message by strategy decision function to service control function simultaneously.
In according to a second embodiment of the present invention, be different from first embodiment, be by the required resource of CPE decision session, and CPE send to service control function by expansion of application layer signaling or special application layer resource signaling.In this case, when the CPE initiation session, service control function has the institute's requested resource by the CPE decision in the request that RACF reports.Accordingly, the processing of step 404 has following modification: if in the step 403, RACF is according to the subscription data of user in the network insertion attached function, based on the policing rule of operator, and existing resource situation, decision-making refusal authorization resources uses, and send the response message of the information that comprises Reason For Denial value and help service control function adjustment resource request to service control function after, then mutual by service control function and CPE, consult definite adjustment to institute's requested resource, after finishing adjustment, initiate resource request to RACF again by service control function again.After this step is identical with first embodiment, does not do at this and gives unnecessary details.
In the third embodiment of the present invention, the request resource process of setting up in the session is identical with first or second embodiment, do not do at this and give unnecessary details, but the 3rd embodiment has done further refinement on the basis of first or second embodiment.Specifically, after session was set up, RACF can report current resource situation to service control function at any time by Gq ' interface.After this, the resource situation that service control function reports according to RACF, whether decision is carried out corresponding resource requirement adjustment or is removed session connection session.For instance, because minimizing has taken place in the total bandwidth of the employed circuit of problem session on the circuit, perhaps the employed backlog of session is serious, and this moment, RACF reported resource situation to service control function, and service control function will be specified the higher coding of another kind of compression ratio for this session.In the present embodiment, because operation layer equipment can in time be known the variation of current resource situation, thus can make corresponding adjustment to the resource requirement of already-existing session, thus session can not interrupted easily when the unexpected anxiety of resource.
In the fourth embodiment of the present invention, has only the step after session is set up among the 3rd embodiment, the step when not having session to set up.
Can know by foregoing description, the present invention has provided in the general raising NGN network operation layer to the solution of transport layer application resource success rate, be convenient to the information interaction of standard relevant interface, help improving session and set up efficient, improve the conveying capacity of network effective information, and improve the conversation switching time delay.
Though by with reference to some preferred embodiment of the present invention, the present invention is illustrated and describes, those of ordinary skill in the art should be understood that and can do various changes to it in the form and details, and without departing from the spirit and scope of the present invention.
Claims (12)
1. operation layer is characterized in that to the method for transport layer request resource in the next generation network, comprises following steps:
When the A session was set up, operation layer equipment was to transport layer device request Resources allocation;
If the described transport layer equipment of B uses through decision-making refusal authorization resources, then send response message to described operation layer equipment, wherein comprise the information that resource request is adjusted in Reason For Denial and/or help;
The described operation layer equipment of C is according to the information of Reason For Denial in the described response message and/or help adjustment resource request, again to transport layer device request Resources allocation.
2. operation layer is characterized in that to the method for transport layer request resource in the next generation network according to claim 1, also comprises following steps:
Session if described transport layer device discovery conventional network resources situation is not enough to support described session, then reports the conventional network resources situation to described operation layer equipment after setting up.
3. operation layer is characterized in that to the method for transport layer request resource in the next generation network according to claim 1 and 2, and described operation layer equipment is service control function or professional control and application subsystem.
4. operation layer is characterized in that to the method for transport layer request resource in the next generation network according to claim 3, and described transport layer equipment is resource admission control function or resource admission control subsystem.
5. operation layer is to the method for transport layer request resource in the next generation network according to claim 4, it is characterized in that, among the described step B, described resource admission control function is according to the subscription data of user in the network insertion attached function, whether authorization resources uses based on the policing rule of operator and the decision-making of existing resource situation.
6. operation layer is characterized in that to the method for transport layer request resource in the next generation network according to claim 4, and described step B also comprises following substep:
If described resource admission control function uses through the decision-making authorization resources, then send gate, bag label and medium control command to transmitting function, send the response message of resource access success simultaneously to service control function by strategy decision function.
7. operation layer is characterized in that to the method for transport layer request resource in the next generation network according to claim 4, and described Reason For Denial and the information that helps to adjust resource request comprise one of following information or its combination:
Conventional network resources situation, the CAMEL-Subscription-Information of user in the network insertion attached function.
8. operation layer is characterized in that to the method for transport layer request resource in the next generation network according to claim 7, and described conventional network resources situation comprises one of following information or its combination:
The business-level information that the present available bandwidth of network, network can be served.
9. operation layer is to the method for transport layer request resource in the next generation network according to claim 1, it is characterized in that, described operation layer equipment is according to the described response message that receives, remove session, or adjust the information of resource request according to described help, after the resource that former request is distributed is adjusted again to described transport layer device request Resources allocation.
10. operation layer is to the method for transport layer request resource in the next generation network according to claim 2, it is characterized in that, described operation layer equipment is removed session according to the described conventional network resources situation that receives, or corresponding resource requirement adjustment is carried out in described session.
11. according to operation layer in claim 9 or the 10 described next generation networks to the method for transport layer request resource, it is characterized in that the resource that described operation layer equipment distributes request also comprises the substep of holding consultation with the customer premises equipment, CPE of initiating described session when adjusting.
12. operation layer is to the method for transport layer request resource in the next generation network according to claim 1 and 2, it is characterized in that described next generation network meets the standard of ITU Telecommunication Standardization Sector or is used for the telecommunications of advanced networks and business and the consensus standard that the internet merges.
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| CN2006100053409A CN1889566B (en) | 2005-07-12 | 2006-01-13 | Resource requesting method of business layer to transmitting layer in next generation network |
| PCT/CN2006/001651 WO2007006231A1 (en) | 2005-07-12 | 2006-07-12 | A method for the service stratum requesting resources from the transmission stratum in ngn |
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| CN200510027691 | 2005-07-12 | ||
| CN200510027691.5 | 2005-07-12 | ||
| CN2006100053409A CN1889566B (en) | 2005-07-12 | 2006-01-13 | Resource requesting method of business layer to transmitting layer in next generation network |
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| CN1889566B true CN1889566B (en) | 2010-08-18 |
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| CN101170497A (en) | 2007-11-20 | 2008-04-30 | 中兴通讯股份有限公司 | Method and device for sending network resource information data |
| US8526304B2 (en) | 2007-12-20 | 2013-09-03 | Zte Corporation | Processing method for resource request in NGN |
| CN101631054A (en) * | 2008-07-15 | 2010-01-20 | 中兴通讯股份有限公司 | Method, device and system for processing rejection message |
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| CN1361612A (en) * | 2000-12-29 | 2002-07-31 | 北京邮电大学 | Simple adaptive fast convergence mark exchange path loop preventing technique |
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| CN1361612A (en) * | 2000-12-29 | 2002-07-31 | 北京邮电大学 | Simple adaptive fast convergence mark exchange path loop preventing technique |
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