CN100421398C - Method for guaranteeing end-to-end business service quality and switching in network - Google Patents
Method for guaranteeing end-to-end business service quality and switching in network Download PDFInfo
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Abstract
The present invention discloses a method for ensuring the quality of service of end-to-end business, which is applied to an access network provided with a network resource manager (ACM) of access side load carrying and a business controlling function entity (SCF). The method comprises procedures that the business connection parameter of this time is determined after a business connection request transmitted by a user terminal (UE) is received by the SCF, and a resource request which comprises the business connection parameter of this time is sent to the ACM; the resource request is received by the ACM, a QoS strategy is calculated according to the topology information of the access network and the business connection parameter of this time, QoS installation messages which comprise QoS strategies are respectively sent to access nodes of the business connection governed by the ACM per se, the QoS strategies are stored by each access node so that the business connection of this time is established, and a business flow is forwarded among access node devices according to the QoS strategies. The present invention also discloses an access network for ensuring the quality of service of end-to-end business. Different QoS assurance and bandwidth requirements can be provided for different kinds of business by the present invention. Thus, the efficiency of network operation is improved, and network maintenance and management are convenient.
Description
Technical field
The present invention relates to communication technical field, be meant a kind of method and access network system that guarantees end-to-end business service quality especially.
Background technology
As shown in Figure 1, the access side of network generally includes customer premises equipment, CPE (CPE), Digital Subscriber Line access server (DSLAM), Broadband Remote Access Server (BRAS) and other convergence device composition at present, as router, switch (LAN SWITCH) etc.
Traditional CPE is exactly an xDSL MODEM who simply has bridge joint and routing function, do not have bandwidth control and diffserv functionality, also can't realize traffic policing, but it supports many permanent virtual to connect the configuration of (PVC)/Virtual Local Area Network, supports the learning functionality of multiport address.More and more abundanter along with the user side business, in order to support data service, packet voice business and packet video business simultaneously, at present novel enhancement mode CPE function is more and more perfect, can carry out traffic identification by port, have heavily functions such as sign, traffic policing, shaping and queue scheduling of traffic classification, priority simultaneously, provide perfect service quality to guarantee.
DSLAM has two kinds of asynchronous transfer mode (ATM) working method and IP working methods usually, and service quality (QoS) characteristic that the former can utilize ATM itself to have realizes relevant QoS control.Such as, the PVC of CBR, VBR form has bandwidth safeguard and Supervision Measures, is fit to handle high priority telecommunication service data flow; UBR PVC does not have certain bandwidth and guarantees that it works in BE (BestEffort) mode, can be used for transmitting common INTERNET Internet data stream.But such DSLAM can not " go deep into " VCC inside seeks and visits payload, can't carry out meticulousr classification and scheduling based on message characteristic, so when using wall scroll VCC carrying multi-service, when (mixed service VCC), need this point to guarantee to cooperate qos policy enforcement by the bandwidth of misconvergence.The ATM DSLAM of enhancement function can support cluster management, and reports topology, IP and link bundling relation and bandwidth information.
IP DSLAM equipment termination user's ATM PVC changes the user service data circulation into the IP/MAC bag then and forwards.Can realize functions such as traffic classification, CAR, message priority scheduling and 802.1P on IP DSLAM, the QoS that solves service with different priority levels stream guarantees.But these strategies of legacy equipment can not dynamically change, so generally do not realize traffic monitoring at this point, only finish classification and priority scheduling.If the user surfs the Net with multiple pvcs, IP DSLAM can be by providing multiple VLAN with different priorities, and user's multiple pvcs is mapped on the different VLAN, and the traffic classification function all can not need.Under wall scroll PVC uplink situation, it may need to support by the message characteristic dispatch service then of classifying.On the IP of enhancement function DSLAM, it can also support cluster management, and reports topology, IP and link bundling relation and bandwidth information.
LANSWITCH dispatches by 802.1P or VLAN with different priorities as convergence device the time, also can select by supporting the CAR function to realize the bandwidth constraints to user traffic flow.If as user's incoming end equipment, because the bag text body that the user comes is not with VLAN, LANSWITCH can't distinguish the business packet literary composition type of different priorities, therefore needs LANSWITCH to realize complicated traffic classification, traffic policing and based on the scheduling feature of different priorities Bao Wen; When beating the VLAN sign to message, provide of the encapsulation of multiple priority to multiple VLAN at flows of telecommunications traffic and INTERNET online stream.
BRAS is last except aaa functionality, also realize some qos features, functions such as heavy label, traffic policing, congested control and queue scheduling as traffic classification, priority tag, it can also have the management of station address, user's access topology information in addition, and these are to guaranteeing to provide necessary base for user QOS.
In sum, can realize that in some access device inside part QoS ensures in the prior art, and some equipment also can provide certain differential service, but, therefore can't carry out bandwidth control and differential service is provided at different business because these equipment do not have the ability of identification services type.And the qos policy of these legacy equipments can not dynamically change along with the resource situation of network, more can't realize traffic policing.It is more and more abundanter to face current Network, such as: traditional data service, novel speech business, IPTV business and other multimedia service, the business tine of using simultaneously along with the increase and the user of the number of users of reaching the standard grade more and more abundanter, these a series of Internet resources problems of business that Access Network has been faced with and how has solved bandwidth utilization, how to have guaranteed qos requirement.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of method and system that guarantee QoS, make it in access network, can provide different differential service at different business.
A kind of method that guarantees QoS provided by the invention is to realize like this.
A kind of method that guarantees end-to-end business service quality is applied in the access network, and described access network has the side of access bearer network explorer ACM, business control function body SCF and access node apparatus, and this method comprises:
A. user terminal UE sends service connection request to SCF;
After b.SCF receives this service connection request, determine this professional parameter that connects, and send the resource request that contains this professional connection parameter that described this professional parameter that connects comprises qos parameter and IP five-tuple information to ACM;
After c.ACM receives resource request, topology information and described this professional calculation of parameter that connects according to Access Network go out qos policy, and connect institute to this business of self administration respectively and send the QoS installation message that contains this qos policy through access node apparatus, described qos policy comprise professional route, path resource and should the business connection through the qos parameter of access node apparatus;
D. each access node apparatus is preserved the qos policy at this this service request of UE, and this professional connection sets up;
E. Business Stream is transmitted between access node apparatus according to qos policy.
As SCF and Broadband Remote Access Server BRAS is non-conterminous when connecing, ACM described in the step c sends resource request by the bearer network explorer CCM to core side, and the resource response that sends according to CCM calculates qos policy.
When SCF and Broadband Remote Access Server BRAS were adjacent, ACM described in the step c directly went out qos policy according to topology information and described this professional calculation of parameter that connects of Access Network.
UE described in the step a sends service connection request by customer premises equipment, CPE CPE to service control function SCF.
Steps d further comprises: d1, described ACM send the connection resource response message to SCF after receiving that the qos policy of all access node apparatus is installed response;
After d2, SCF received the connection resource response message, beginning sent service traffics to CPE.
When user's connection request was uplink service, described access node apparatus comprised CPE and BRAS;
When user's connection request was downlink business, described access node apparatus was BRAS;
When user's connection request was up-downgoing professional, described access node apparatus comprised CPE, DSLAM and BRAS.
This method further comprises:
By management logic passage fixing between DSLAM and the CPE priority is set, perhaps be provided with in the enterprising industry affair of CPE priority by hand, each professional corresponding priorities that connects is mapped on corresponding PVC or the VLAN, and carries out professional link sort and sign by DSLAM.
If the node device in the described Access Network is supported the MPLS technology, described path resource all is a label switched path (LSP);
If DSLAM and BRAS support the MPLS technology in the described access network, CPE does not support the MPLS technology, and then described path resource comprises tunnel and LSP.
The topology information of Access Network described in the step c is pre-configured among the ACM, or in the network equipment that is configured in except that ACM and can communicates with ACM.
A kind of access network system that guarantees QoS provided by the invention is to realize like this.
A kind of assurance access network system of QoS end to end comprises: operation controlling entity, access side entity of carrying control function and access loading network,
Wherein, after operation controlling entity receives the service connection request of user terminal UE transmission, send resource request to inserting the side entity of carrying control function, described this professional parameter that connects comprises service quality QoS parameter and IP five-tuple information; Begin to send Business Stream according to the connection resource response message that receives to CPE;
After access side entity of carrying control function is received resource request, topology information and described this professional parameter that connects according to Access Network calculate qos policy for this UE, and the QoS installation message that will contain this qos policy sends to the access node apparatus in the access loading network, described qos policy comprise professional route, path resource and should business connect through the qos parameter of access node apparatus;
Each access node apparatus in the bearer network is preserved described qos policy; Transmit this UE corresponding service stream according to this qos policy.
Described carrying Access Network comprises BRAS, DSLAM and the CPE that is connected with UE, and wherein, CPE links to each other with access side entity of carrying control function with BRAS by DSLAM, and described DSLAM links to each other with BRAS by ATM or IP network.
The present invention utilizes ACM to carry out network topology and the path resource is calculated, and issues qos policy to bearer network equipment and terminal, thereby guarantees and bandwidth requirement for miscellaneous service provides QoS.This method can be carried out bandwidth control and differential service is provided at different business, also can dynamically change along with the resource situation of network.This method can better improve client's satisfaction, has improved the efficient of network operation greatly, makes things convenient for the network operation management of operator.
Description of drawings
Fig. 1 is the access network hierarchical chart;
Fig. 2 is for realizing access network framework map of the present invention;
Fig. 3 is for realizing the schematic flow sheet of the inventive method;
Fig. 4 is the schematic flow sheet of the specific embodiment one of realization the inventive method;
Fig. 5 is the schematic flow sheet of the specific embodiment of realization the inventive method.
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.
In order to realize the present invention proposes a kind of access network structure at each professional purpose that differential service is provided that connects.
Referring to shown in Figure 2, access network of the present invention comprises business control function body (SCF), inserts side bearer network explorer (ACM), access node apparatus.Access node apparatus comprises CPE, DSLAM, BRAS etc.
Wherein, SCF is used for the miscellaneous service of customer service application is controlled, determine this professional required parameter according to service request from user: qos parameter, IP five-tuple, be source IP address, purpose IP address, protocol number, source port number, destination slogan, then to the bearer channel of bearer control layer application Business Stream.And logically SCF can comprise a plurality ofly, and each SCF that is to say that at a kind of type of service each SCF handles a kind of service request.
ACM is in charge of the bearing bed Internet resources that insert side with service logic, and sets up the end-to-end bearer channel that accord with Q oS requires for the QoS request from SCF, and this bearer channel is to represent by the MPLS label stack.Like this, the present invention utilizes ACM to carry out network topology and the path resource is calculated, and issues qos policy to bearer network equipment and terminal, thereby guarantees for miscellaneous service provides QoS.And ACM links to each other with resources of core network manager (CCM), resources of core network manager (CCM).And the applicant had proposed the processing procedure of core net portion C CM, was not therefore describing here.
Need to prove, the present invention need be kept at network side in advance with access topology information, such as, access topology information can be kept among the ACM, also access topology information can be kept in the miscellaneous equipment in the Access Network, such as, among the BRAS, as long as ACM can obtain these access topology information by communicating with this equipment.
Referring to shown in Figure 3, realize that method of the present invention may further comprise the steps:
Step 301:UE sends service connection request to SCF, wherein, comprises requested service type information etc.
After step 302:SCF receives this service connection request, determine this professional parameter that connects, and send the resource request that contains this professional connection parameter to ACM according to this service connection request.Here, this professional parameter that connects comprises this professional corresponding qos parameter, IP five-tuple information, IP five-tuple information comprises source IP address, purpose IP address, protocol number, source port number, destination slogan, and the acquisition mode of IP five-tuple information is identical with obtain manner in other IP network.In actual application, can in SCF, preserve the corresponding relation of type of service and QOS parameter, above-mentioned this professional corresponding qos parameter can obtain according to this corresponding relation of the type of service index in this service connection request.Certainly, also can utilize certain strategy or formula to calculate.
After step 303:ACM receives resource request, access topology information according to this user's correspondence, the professional calculation of parameter that connects of in access topology information and the resource request this goes out qos policy, and the access node apparatus that connects required process to this business respectively sends the QoS installation message that contains this qos policy.Here, described this professional qos policy that connects comprises professional route, path resource and qos parameter.
Step 304: each access node apparatus is preserved the qos policy at this this service request of UE, and sends the policy installation response to ACM.
Step 305:ACM sends the connection resource response message to SCF after receiving that the qos policy of all access devices is installed response.
After step 306:SCF receives the connection resource response message, send the connection resource response to CPE, after this terminal can and network side between begin to carry out normal business.
Certainly, usually because Virtual network operator and content service provider are independently, there are the adjacent and two kinds of situations of adjacency not of SCF and BRAS.That is to say, if the business end to end of user's request may be only through Access Network, the i.e. adjacent situation of SCF and BRAS; The business end to end of user request may be passed through Access Network and core net, also may pass through Access Network, core net and Access Network, and this is SCF and the BRAS situation of adjacency not just.For the processing procedure in the core net, the applicant had proposed related application, and the part that relates to the Resources allocation in the core net here repeats no more.
Therefore, with above-mentioned two kinds of situations the present invention is described in further detail respectively below.
As shown in Figure 4, if SCF and BRAS are adjacent, it is as follows to realize setting up the professional detailed process that connects of QoS:
Behind the terminal equipment of step 400:CPE side (END1) power-up initializing, initiate to contain the user authentication request of user account number to BRAS, after BRAS receives this user authentication request, for this user distributes the address, and write down user basic information such as this user's account number and address and this user's access topology information, and after authentication is passed through, allow the user to insert.Here, can comprise authentification of user and be not limited to following mode: DHCP, PPPOE, PORTAL, 802.1x.
After step 401:CPE receives and connects the request of foundation from one type of END1 business, can be according to the physical port number or the IP address field differentiated service type of this service connection request that receives, and send to such professional corresponding SCF and to connect the request of foundation.Wherein, the professional subscriber identity information that carries traffic type information, self Subscriber Number, source IP address and purpose IP address and source user terminal and purpose user terminal in the request of foundation etc. that connects.And and different, as the IPTV business, terminal can have specific client and server and privately owned agreement to the communication protocol between CPE and the SCF according to different SCF.
After step 402:SCF receives that request is set up in this connection, determine this professional parameter that connects, promptly qos parameter, IP five-tuple information are initiated resource request message to ACM then.
Here, this is professional to connect the identification information that parameter can also comprise other unique this END1 of identification, as the Subscriber Number of source user terminal, in the source user terminal SIM CARD number etc.Described resource request message can adopt the resource request agreement of defined standard, as RCIP, and perhaps self-defining resource request agreement etc.
After step 403:ACM receives this resource request, obtain this user's access topology information, carry out this professional professional route that connects and the calculating of path resource by this user's access topology information, draw the qos parameter of CPE, DSLAM and BRAS, and send the QoS installation message that contains the qos parameter that calculates to CPE, DSLAM and BRAS respectively.Here, the QOS installation message can be used SNMP standard agreement or other qos policy installation code agreement, as the COPS agreement.
And because access topology information can be pre-configured among the ACM, this moment, ACM can directly obtain, and also can be arranged in the miscellaneous equipment, as BRAS, as long as ACM can get access to by communication mode with these equipment.
After step 404:CPE, DSLAM and BRAS receive the QoS installation message that contains qos policy, preserve the qos policy of receiving, and send the installation response to ACM respectively.
Step 405:ACM sends the connection resource response message to SCF after receiving that the qos policy of all access devices is installed response.
After step 406:SCF receives the connection resource response message, send the connection resource response to CPE, after this terminal can and network side between begin to carry out normal business.
As shown in Figure 5, if SCF and BRAS is non-conterminous connects, it is as follows to realize setting up the professional detailed process that connects of QoS:
Step 500～502 are identical with step 400～402.
Briefly, behind the terminal equipment of cpe side (END1) power-up initializing, initiate to contain the user authentication request of user account number to BRAS, after BRAS receives this user authentication request, for this user distributes the address, and write down user basic information and access topology information such as this user's account number and address.After CPE receives and connects the request of foundation from END1 a kind of professional, send to the SCF of correspondence at this business and to connect the request of foundation.After SCF receives that request is set up in this connection, determine this professional parameter that connects: qos parameter, IP five-tuple information send to ACM then and contain this professional resource request message that connects parameter.
After step 503:ACM receives resource request, get access to the access topology information of this user's correspondence, determine that according to topology information the purpose terminal then do not carry out resource request to CCM in compass of competency, distribute the QOS strategy such as route, bandwidth in its field of administering by CCM.
After step 504:ACM receives the resource response of the QOS strategy that contains the CCM distribution that CCM sends, ACM carries out this professional professional route that connects by the Access Network topology information and the path resource is calculated, draw the qos policy of CPE, DSLAM and BRAS, and send the QoS installation message that contains qos policy to CPE, DSLAM and BRAS respectively.
Here, the mode of qos parameter is installed uses SNMP standard agreement or other qos policy installation code agreement, as the COPS agreement.
Step 505～508 are identical with step 703～706.Briefly, after CPE, DSLAM and BRAS receive the installation message that contains qos parameter, preserve the qos policy of receiving, and send the installation response to ACM respectively.ACM sends the connection resource response message to SCF after receiving that the qos policy of all access devices is installed response.After SCF receives the connection resource response message, send the connection resource response to CPE, after this terminal can and network side between begin to carry out normal business.Transmit in the path that comprises in the QOS strategy that Business Stream issues according to ACM.
Above-mentioned two embodiment all support the MPLS technology based on all access node apparatus, and therefore, ACM is issued to CPE with the QoS mounting strategy.If the still early stage tradition of CPE, simple CPE do not support the MPLS technology, can between DSLAM and CPE, user bandwidth be provided with enough well-to-doly, qos policy is issued to DSLAM and gets final product like this.And, consider that CPE is relatively near user resident, can also be provided with in the enterprising industry affair of CPE priority by management logic passage fixing between DSLAM and the CPE, the priority mapping that this is professional is carried out professional link sort and sign by DSLAM to corresponding PVC/VLAN.
And above-mentioned two embodiment have applied for the professional situation about connecting of uplink and downlink at UE the present invention will be described.If UE only applies for uplink service, this professional access node apparatus need pass through CPE, BRAS, and ACM only needs to issue QoS to these two access node apparatus and installs and get final product so; When if the user only applies for downlink business, the access node of process be BRAS, ACM only needs to issue QoS to BRAS and installs and get final product so.
In addition, consider that the MPLS technology shields traditional IP and atm network, and provide perfect traffic engineering and OAM(Operation Administration Maintenance), point out that DSLAM is ATM DSLAM or IP is DSLAM so be indifferent among the present invention, for a kind of mode of the convergence device of those LAN SWITCH and so on is that different VLAN carries out professional classification transmission, can dispose the link and the exchange capacity of not restraining in addition and solve.
Therefore, the present invention can distribute qos policy at each professional connection by ACM, and then the business that can provide different QoS to require at different business provides differential service and bandwidth to guarantee service.And access network of the present invention is not limited to the network of concrete any access form, and it can as xDSL, LAN and following xPON, provide based on the otherness service of IP operation and the QoS and the bandwidth of multimedia service to guarantee to multiple access network.
In a word, the above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (10)
1. method that guarantees end-to-end business service quality, be applied in the access network, it is characterized in that described access network has the side of access bearer network explorer ACM, business control function body SCF and access node apparatus, this method may further comprise the steps:
A. user terminal UE sends service connection request to SCF;
After b.SCF receives this service connection request, determine this professional parameter that connects, and send the resource request that contains this professional connection parameter that described this professional parameter that connects comprises service quality QoS parameter and IP five-tuple information to ACM;
After c.ACM receives resource request, topology information and described this professional calculation of parameter that connects according to Access Network go out qos policy, and connect institute to this business of self administration respectively and send the QoS installation message that contains this qos policy through access node apparatus, described qos policy comprise professional route, path resource and should the business connection through the qos parameter of access node apparatus;
Wherein, when non-conterminous the connecing of Broadband Remote Access Server BRAS in SCF and the Access Network, ACM described in the step c sends resource request by the bearer network explorer CCM to core side, and the resource response that sends according to CCM calculates qos policy;
D. each access node apparatus is preserved the qos policy at this this service request of UE, and this professional connection sets up;
E. Business Stream is transmitted between access node apparatus according to qos policy.
2. method according to claim 1, it is characterized in that, described step c further comprises: when BRAS was adjacent in SCF and the Access Network, described ACM was that direct topology information and described this professional calculation of parameter that connects according to Access Network goes out qos policy.
3. method according to claim 1 is characterized in that, UE described in the step a sends service connection request by customer premises equipment, CPE CPE to service control function SCF.
4. method according to claim 3 is characterized in that steps d further comprises:
D1, described ACM send the connection resource response message to SCF after receiving that the qos policy of all access node apparatus is installed response;
After d2, SCF received the connection resource response message, beginning sent service traffics to CPE.
5. method according to claim 1 is characterized in that,
When user's connection request was uplink service, described access node apparatus comprised CPE and BRAS;
When user's connection request was downlink business, described access node apparatus was BRAS;
When user's connection request was up-downgoing professional, described access node apparatus comprised CPE, Digital Subscriber Line access server DSLAM and BRAS.
6. method according to claim 5 is characterized in that, this method further comprises:
By management logic passage fixing between DSLAM and the CPE priority is set, perhaps be provided with in the enterprising industry affair of CPE priority by hand, each professional corresponding priorities that connects is mapped on corresponding PVC or the VLAN, and carries out professional link sort and sign by DSLAM.
7. method according to claim 1 is characterized in that,
If the node device in the described Access Network is supported the MPLS technology, described path resource all is a label switching path LSP;
If DSLAM and BRAS support the MPLS technology in the described access network, CPE does not support the MPLS technology, and then described path resource comprises tunnel and LSP.
8. method according to claim 1 is characterized in that the topology information of Access Network described in the step c is pre-configured among the ACM, or in the network equipment that is configured in except that ACM and can communicates with ACM.
9. one kind guarantees the access network system of QoS end to end, it is characterized in that this access network system comprises: operation controlling entity, access side entity of carrying control function and access loading network,
Wherein, operation controlling entity is used for after the service connection request that receives user terminal UE transmission, sends resource request to inserting the side entity of carrying control function, and described this professional parameter that connects comprises service quality QoS parameter and IP five-tuple information; Begin to send Business Stream according to the connection resource response message that receives to CPE;
Described access side entity of carrying control function, be used for after receiving described resource request, topology information and described this professional parameter that connects according to Access Network calculate qos policy for this UE, and the QoS installation message that will contain this qos policy sends to the access node apparatus in the access loading network, described qos policy comprise professional route, path resource and should business connect through the qos parameter of access node apparatus;
Wherein, when the BRAS in operation controlling entity and the Access Network is non-conterminous when connecing, this access side entity of carrying control function is to send resource request by the CCM to core side, and calculates qos policy according to the resource response that CCM sends;
Each access node apparatus in the described access loading network is used to preserve described qos policy; Transmit this UE corresponding service stream according to this QOS strategy.
10. access network system according to claim 9, it is characterized in that, described carrying Access Network comprises BRAS, DSLAM and the CPE that is connected with UE, wherein, CPE links to each other with access side entity of carrying control function with BRAS by DSLAM, and described DSLAM links to each other with BRAS by ATM or IP network.
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020131426A1 (en) * | 2000-06-22 | 2002-09-19 | Mati Amit | Scalable virtual channel |
| WO2004014045A1 (en) * | 2002-07-24 | 2004-02-12 | International Business Machines Corporation | Service class dependant asignment of ip addresses for cotrolling access to an d delivery of e-sevices |
| CN1486019A (en) * | 2002-09-23 | 2004-03-31 | ��Ϊ��������˾ | Network management method based on quality of service |
| US20040160979A1 (en) * | 2003-02-14 | 2004-08-19 | Christine Pepin | Source and channel rate adaptation for VoIP |
| CN1523834A (en) * | 2003-02-20 | 2004-08-25 | ��Ϊ��������˾ | IP network service quality assurance method and system |
| CN1525702A (en) * | 2003-02-26 | 2004-09-01 | ��Ϊ��������˾ | Method for ensuring QoS of IP access network service |
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