CN101998515B - The implementation method of control PCRF load balancing and realize system - Google Patents
The implementation method of control PCRF load balancing and realize system Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/08—Load balancing or load distribution
- H04W28/088—Load balancing or load distribution among core entities
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
- H04L67/1036—Load balancing of requests to servers for services different from user content provisioning, e.g. load balancing across domain name servers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/18—Service support devices; Network management devices
Abstract
The implementation method of the present invention's control PCRF load balancing comprises: information gathering procedure, Diameter route agent DRA from DRA binding point to strategy and charge execution function PCRF obtain described PCRF current loading condition information; PCRF selects step, and described DRA, according to all PCRF current loading condition information obtained, is the PCRF that newly-built diameter session selects load lower.The implementation method of the present invention's control PCRF load balancing and realize the load balancing that system can realize PCRF.
Description
Technical field
The communications field of the present invention, especially a kind of implementation method of control PCRF load balancing and realize system.
Background technology
3GPP (3rdGenerationPartnershipProject, third generation partner program) EPS by E-UTRAN (EvolvedUniversalTerrestrialRadioAccessNetwork, the Universal Terrestrial Radio Access Network of evolution), MME (MobilityManagementEntity, mobile management unit), S-GW (ServingGateway, gateway), P-GW (PacketDataNetworkGateWay, data network gateway), HSS (HomeSubscriberServer, home subscriber server), 3GPPAAA server (3GPP authentication and authorization charging server), PCRF (PolicyandChargingRulesFunction, "Policy and Charging Rules Function) and other support nodes composition.Wherein, S-GW is the accessing gateway equipment be connected with E-UTRAN, forwarding data between E-UTRAN and P-GW, and is responsible for carrying out buffer memory to pending datas such as pagings; P-GW is then the borde gateway of EPS and PDN (PacketDataNetwork, Packet Data Network), is responsible for the access of PDN, forwarding data etc. between EPS and PDN; PCRF is by Rx interface and operator IP (InternetProtocol, Internet protocol) business network interface, obtain business information, another side it be connected with the gateway device in network by Gx/Gxa/Gxc interface, be responsible for the foundation initiating IP carrying, ensure the QoS (QualityofService, service quality) of business datum, and carry out charging control.
In 3GPP network between EPS, PCEF (Policyandchargingenforcementfunction, strategy and charge execution function) be present in P-GW, as long as PCRF with P-GW is connected the control that can complete all functions, by Gx interface exchange message between PCRF and P-GW.Interface when between P-GW and S-GW is based on PMIP (ProxyMobileIP, proxy-mobile IP) time, bearing binding and event reporting function is there is in S-GW, be called BBERF (BearerBindingandEventReportFunction), by Gxc interface exchange message between S-GW and PCRF.When trusted non-3 GPP network accesses, the trusted non-3 GPP access network Central Shanxi Plain also resident BBERF, by Gxa interface exchange message between trusted non-3 GPP network IAD and PCRF.UE (UserEquipment, subscriber equipment) when roaming, S9 interface is as the interface of ownership place PCRF and visited place PCRF, simultaneously, for UE provides the AF (ApplicationFunction of business, application function) sent for generating the tactful business information of PCC (PolicyandChargingControl, policy and charging control) to PCRF by Rx+ interface.
A PLMN (PublicLandMobileNetwork of EPS, public land mobile telephone network) in there is multiple PCRF node, and all PCRF node belong to one or more Diameter (PCRF) territory, all PCRF in same Diameter (PCRF) territory have identical ability.The connection of UE to a PDN network is called an IP-CAN (IPConnectivityAccessNetwork, IP connect Access Network) session.The PCC strategy of an IP-CAN session is only determined by a PCRF.All PCEF or BBERF be correlated with in order to ensure an IP-CAN session and provide the AF of business to be all associated with same PCRF for this IP-CAN session, EPS introduces a logic functional block DRA (DiameterRoutingAgent in each Diameter (PCRF) territory, Diameter route agent), as Fig. 1, 2, shown in 3, wherein, Fig. 1 is the roaming architecture figure of the local route of EPS, the local break-out that Fig. 2 is EPS home network operator provide the roaming architecture figure of IP operation, the local break-out that Fig. 3 is EPS access zone network operator provide the roaming architecture figure of IP operation.
When UE will be established to the IP-CAN session of a PDN, select a PCRF by DRA for this IP-CAN session, PCEF, BBERF and the AF (be referred to as client) relevant to this IP-CAN session by DRA to be associated with on selected PCRF.PCEF, BBERF and AF set up Diameter session with the PCRF chosen respectively, and transmit the strategy that controls IP-CAN session and business information etc. by these Diameter sessions.Correctly PCEF, BBERF and AF are associated with a PCRF in order to ensure DRA, DRA will preserve can this IP-CAN session of unique identification information of being correlated with and corresponding PCRF mark or IP address, the information of mark IP-CAN session has the NAI of UE, and the IP address of UE and UE will access the APN etc. of PDN.When PCEF, BBERF and AF of same IP-CAN session is when setting up the Diameter session with PCRF, provide these information to DRA, DRA searches the information of preservation, just can select same PCRF for it.The information of the Diameter session of PCEF, BBERF or AF and PCRF foundation can be preserved, as the session identification etc. of the Diameter session of foundation in DRA.Such DRA just can know the Diameter session that it manages for IP-CAN session.When the Diameter session that PCEF, BBERF or AF and PCRF set up is deleted, PCEF, BBERF or AF will notify that this Diameter of DRA deletes, and DRA can delete the information (as session identification) of this Diameter session.After DRA is all Diameter session deletions of certain IP-CAN session management, DRA will delete all information of this IP-CAN session.
DRA specific implementation can have three kinds of modes:
(1) Redirect mode.When PCEF, BBERF and AF send Diameter session establishment request message to PCRF, first this message be sent to DRA.If during the information that DRA does not also have this IP-CAN session relevant, DRA can select a PCRF for this IP-CAN session.And the mark of selected PCRF or address are returned to transmit leg.If there has been the information that this IP-CAN session is relevant in DAR, then the mark of the PCRF of correspondence or address have been returned to transmit leg by DRA.Transmit leg obtains the address of PCRF or sends Diameter session establishment request message to selected PCRF again after identifying.
(2) Proxy mode.When PCEF, BBERF and AF send Diameter session establishment request message to PCRF, first this message be sent to DRA.If during the information that DRA does not also have this IP-CAN session relevant, DRA can select a PCRF for this IP-CAN session, and this message is transmitted to selected PCRF.If there has been the information that this IP-CAN session is relevant in DRA, then this message has been transmitted to corresponding PCRF by DRA.The acknowledge message of PCRF is also transmitted to PCEF, BBERF or AF by DRA.
(3) distortion of Proxy mode.Similar with Proxy mode, difference is that DRA also can send to PCEF, BBERF or AF the address of PCRF when forwarding the acknowledge message that PCRF returns.Like this in interacting message subsequently, PCEF, BBERF or AF can directly and PCRF need alternately and not through DRA.
For mode (2) and (3), in current standard, proxyDRA selects PCRF to be random when creating DRA binding, does not ensure the load balancing between each PCRF.Under the condition not changing existing framework, need a kind of method and obtain PCRF load information to make DRA, calculate the dynamic load factor and regulate and control PCRF load balancing.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of implementation method of control PCRF load balancing and realizes system, to realize the load balancing of PCRF.
For solving above technical problem, the invention provides a kind of implementation method of control PCRF load balancing, the method comprises:
Information gathering procedure, Diameter route agent DRA from DRA binding point to strategy and charge execution function PCRF obtain described PCRF current loading condition information;
PCRF selects step, and described DRA, according to all PCRF current loading condition information obtained, is the PCRF that newly-built diameter session selects load lower.
Further, described information gathering step performs after creating, verify or delete described DRA binding, specifically comprises:
Described DRA sends Diameter conversation message to PCRF, wherein carries PCRF status poll instruction;
Described PCRF returns response message to described DRA, wherein carries described PCRF current loading condition information after receiving inquiry instruction;
Described DRA receives described response message, obtains described PCRF current loading condition information.
Further, described DRA arranges and inquires about timer for each PCRF or all PCRF, before described DRA sends described Diameter conversation message to described PCRF, judge timer expiry and in timing cycle and when not yet sending PCRF status poll instruction to described PCRF after time-out, in described Diameter conversation message, carry described PCRF status poll instruction; Described DRA restarts the inquiry timer of described PCRF after receiving the response message of described PCRF transmission.
Further, after described DRA receives described response message, described load state information is wherein deleted, be transmitted to the network element relevant to described diameter session again, described network element comprises strategy and charge execution function PCEF, bearing binding and event reporting function BBERF or application function AF network element.
Further, described Diameter conversation message is Diameter conversation request message, Diameter session updates message or Diameter session termination message.
Further, described method is applicable to roaming scence and non-roaming scene.
For solving above technical problem, what present invention also offers a kind of control PCRF load balancing realizes system, and this system comprises connected Diameter route agent DRA and several PCRF, wherein:
Described DRA comprises the message processing module and PCRF selection module that are connected, and the messaging interface to be connected with described message processing module, wherein, described message processing module is used for sending in diameter message at the PCRF pointed to DRA binding inserting load condition inquiry instruction, and resolves the current loading condition information that described PCRF returns;
Described PCRF selects module, for according to all PCRF current loading condition information obtained, uses Dynamic Load-balancing Algorithm, newly-built diameter session is directed to the lower PCRF of load;
Described messaging interface is used for sending diameter message to described PCRF and receives the response message that described PCRF returns;
Described PCRF, for receiving the diameter message that described DRA sends, and returns to described DRA the response message carrying current loading condition information according to described load condition inquiry instruction.
Further, described DRA also comprises the time block be connected with described message processing module, described time block is used for notifying described message processing module when timing arrives, described message processing module judges timer expiry and in timing cycle and when not sending PCRF status poll instruction to described PCRF after time-out, carries described PCRF status poll instruction in described Diameter message; Described message processing module also for receive described PCRF send response message after, restart described time block.
Further, described message processing module also deletes current loading condition information in the response message that returns from PCRF, described messaging interface is also for sending to diameter session related network elements or receiving diameter message, and described related network elements comprises strategy and charge execution function PCEF, bearing binding and event reporting function BBERF or application function AF network element.
Further, described message processing module inserts described load condition inquiry instruction sending in the Diameter session request of described PCRF, renewal or ending message, and described PCRF sends current loading condition information by response message to described DRA.
The inventive method and system are by the current loading condition information by DRA active obtaining PCRF, and the idle capacity ratio of all PCRF is obtained according to dynamic algorithm, newly-built diameter session is directed to the lower PCRF of load, thus achieves the load balancing realizing between multiple PCRF under DRA regulation and control.
Accompanying drawing explanation
Fig. 1 is the roaming architecture figure of the local route of EPS.
The local break-out that Fig. 2 is EPS home network operator provide the roaming architecture figure of IP operation.
The local break-out that Fig. 3 is EPS access zone network operator provide the roaming architecture figure of IP operation.
Fig. 4 is the flow chart of the implementation method embodiment one of the present invention's control PCRF load balancing.
Fig. 5 is the flow chart of the implementation method embodiment two of the present invention's control PCRF load balancing.
Fig. 6 is the flow chart of the implementation method embodiment three of the present invention's control PCRF load balancing.
Fig. 7 is the flow chart of the implementation method embodiment four of the present invention's control PCRF load balancing.
Fig. 8 is the flow chart of the implementation method embodiment five of the present invention's control PCRF load balancing.
Fig. 9 is the flow chart of the implementation method embodiment six of the present invention's control PCRF load balancing.
Figure 10 is the schematic diagram of the system that realizes of the present invention's control PCRF load balancing.
Embodiment
The implementation method of the present invention's control PCRF load balancing, comprises the following steps:
Information gathering procedure, the PCRF that Diameter route agent DRA points to from DRA binding obtains described PCRF current loading condition information;
PCRF selects step, and described DRA, according to all PCRF current loading condition information obtained, obtains the idle capacity ratio of all PCRF, newly-built diameter session is directed to the lower PCRF of load according to dynamic algorithm.
Above information gathering step performs after creating, verify or delete described DRA binding, can obtain to PCRF by sending independently message, preferably, the present invention realizes under being recommended in the condition not changing existing framework, specifically comprise: described DRA sends Diameter session request, renewal or ending message to PCRF, wherein carry PCRF status poll instruction; Described PCRF returns response message to described DRA, wherein carries described PCRF current loading condition information after receiving inquiry instruction; Described DRA receives described response message, obtains described PCRF current loading condition information.
In order to the frequency that suitable control DRA inquires about to PCRF, at DRA, the timer of inquiry for each PCRF or all PCRF can be set, periodically to trigger the load condition that DRA inquires about certain PCRF.Before described DRA sends described Diameter session request, renewal or ending message to described PCRF, judge timer expiry and in timing cycle and when not sending PCRF status poll instruction to described PCRF after time-out, in described Diameter session request, renewal or ending message, carry described PCRF status poll instruction; Described DRA restarts the inquiry timer of described PCRF after receiving the response message of described PCRF transmission.When not meeting above-mentioned condition, DRA only serves as forwarding function, does not carry out any processing or parsing to diameter message.In addition, if do not use described timer, then need DRA forward every bar newly-built/amendment/termination diameter conversation request message time, insert PCRF status poll instruction, and resolve the response message that every bar PCRF replys, obtain PCRF state information.
After described DRA receives described response message, described load state information is wherein deleted, then is transmitted to the network elements such as PCEF, BBERF or the AF relevant to described diameter session.
Technical scheme provided by the invention achieves under roaming or non-roaming scene, when BBERF, PCEF or AF set up Diameter session between PCRF, and the load balancing that can be regulated and controled realize between multiple PCRF by DRA.
Below in conjunction with accompanying drawing, the method for the invention is further described.
Embodiment considers following scene: (1) proxyDRA under non-roaming scene controls to low load P CRF and sets up diameter session, as embodiment one; (2) under roaming scence, proxyDRA controls to low load P CRF and sets up diameter session, as embodiment two; (3) under non-roaming scene, proxyDRA obtains PCRF load state information, as embodiment three in termination diameter session flow process; (4) under roaming scence, proxyDRA obtains PCRF load state information, as embodiment four in termination diameter session flow process; (5) the amendment diameter session flow process that under non-roaming scene, client initiates, proxyDRA obtains PCRF load state information, as embodiment five; (6) the amendment diameter session flow process that under roaming scence, V-PCRF initiates, proxyDRA obtains PCRF load state information, as embodiment six.
In following flow process, PCEF, BBERF and AF are referred to as client.
Embodiment one
Present embodiment describes client and proxyDRA and PCRF all when belonging area network, trigger diameter session establishment flow process by external event, and obtain PCRF load information by DRA and control diameter session establishment to the lower PCRF of load.The present embodiment is equally applicable to network element shown in all Fig. 4 all in the scene of access zone network.As shown in Figure 4, each step is described below:
The client of step 401:proxyDRA receives external trigger (such as the request of IP-CAN session establishment), needs to set up a diameter session with PCRF;
Step 402:Client has the diameter of user profile (as UE-NAI) to set up request to proxyDRA transmit band;
User profile preserves by step 403:DRA, and check current whether exist to should user DRA binding.If there is no, DRA can create dynamic DRA binding (be each UE or each IP-CAN and assign a PCRF).DRA assign PCRF be Network Based in the load percentage of each PCRF select the minimum PCRF of load, in the present embodiment, DRA have selected PCRF-1;
Step 404:proxyDRA forwards diameter request message to PCRF-1.If the inquiry timer of the PCRF-1 now in DRA is overtime, and DRA not yet sends inquiry request, then DRA also should add band PCRF status poll instruction in diameter request message;
Step 405: the status poll instruction in diameter request message detected, PCRF-1 returns diameter response message (comprising the current state information of PCRF-1, as idle capacity etc.) to DRA;
The diameter response message of step 406:ProxyDRA analyzing step 405, obtains the state information of PCRF-1, and from message, delete this part, then message is transmitted to client.DRA restarts the status poll timer of PCRF-1;
Step 407: if be configured with PA2, the address of PCRF-1 can store by client, and follow-up diameter conversation message is skipped proxyDRA, directly issues PCRF-1;
Configuration PA2 and DRA also can send to PCEF, BBERF or AF the address of PCRF when forwarding the acknowledge message that PCRF returns.In interacting message subsequently, PCEF, BBERF or AF directly and PCRF need alternately and not through DRA.
So far, DRA have updated the load information of PCRF-1, after this calculates PCRF relative free ratio according to the load state of PCRF all in network, the PCRF that the diameter session for newly-built IP-CAN session selects load lower.
Embodiment two
Present embodiment describes visited place PCRF and locate ownership place PCRF through ownership place proxyDRA, set up the signaling process of diameter session, wherein DRA obtain PCRF load information and control diameter session establishment to the lower PCRF of load.As shown in Figure 5, each step is described below:
Step 501: visited place V-PCRF receives external trigger (the session establishment request on such as s9 interface), needs to set up a diameter session with ownership place H-PCRF;
Step 502:V-PCRF has the diameter of user profile (as UE-NAI) to set up request to ownership place H-DRA transmit band;
User profile preserves by step 503:H-DRA, and check current whether exist to should user DRA binding.If there is no, DRA can create dynamic DRA binding (be each UE or each IP-CAN and assign a PCRF).H-DRA assigns PCRF to be that in the present embodiment, H-DRA have selected H-PCRF-1 based on the load percentage selection load of PCRF each in home network minimum PCRF;
Step 504:proxyH-DRA forwards diameter request message to H-PCRF-1.If the inquiry timer of the H-PCRF-1 now in DRA is overtime, and H-DRA not yet sends inquiry request, then H-DRA also should add band PCRF status poll instruction in diameter request message;
Step 505: the status poll instruction in diameter request message detected, H-PCRF-1 returns diameter response message (comprising the current state information of H-PCRF-1, as idle capacity etc.) to H-DRA;
The diameter response message of step 506:H-DRA analyzing step 505, obtains the state information of H-PCRF-1, and from message, delete this part, then message is transmitted to V-PCRF.H-DRA restarts the status poll timer of H-PCRF-1;
Step 507: if be configured with PA2, the address of H-PCRF-1 can store by V-PCRF, and follow-up diameter conversation message is skipped proxyDRA, directly issues H-PCRF-1;
So far, H-DRA have updated the load information of H-PCRF-1, after this calculates PCRF relative free ratio according to the load state of PCRF all in home network, the PCRF that the diameter session for newly-built IP-CAN session selects load lower.
Embodiment three
The client of what the present embodiment described is proxyDRA terminates the flow process of diameter session, and wherein DRA gets the load information of PCRF by client.The present embodiment is equally applicable to the scene of visited place client by visited place DRA termination diameter session.As shown in Figure 6, each step is described below:
The client of step 601:proxyDRA receives external trigger (the IP-CAN session termination request that such as UE or PCRF initiates), needs to terminate with PCRF diameter session;
Step 602:Client sends the request of diameter termination to proxyDRA, and message uses the Session-IDAVP (session identification ID) identical with the diameter session of having set up between client and PCRF-1;
Step 603: by checking the Session-IDAVP of step 602 message, ProxyDRA authenticates to a DRA for this IP-CAN session and binds (pointing to PCRF-1);
Step 604:proxyDRA forwards diameter termination request message to PCRF-1.If the inquiry timer of the PCRF-1 now in DRA is overtime, and DRA not yet sends inquiry request, then DRA also should add band PCRF status poll instruction in diameter terminates request message;
Step 605: the status poll instruction that diameter terminates in request message detected, the session that PCRF-1 termination is corresponding also returns diameter response message (comprising the current state information of PCRF-1, as idle capacity etc.) to DRA;
Step 606:ProxyDRA by diameter session tokens for terminate.If DRA binding is for each IP-CAN conversation establishing, and the diameter session under this IP-CAN sessions all is terminated all, if or create for each UE during DRA binding, and the diameter session of this UE all is terminated all, and so DRA binding will be deleted;
The diameter response message of step 607:DRA analyzing step 605, obtains the state information of PCRF-1, and from message, delete this part, then message is transmitted to client.DRA restarts the status poll timer of PCRF-1.
So far, proxyDRA have updated the load information of PCRF-1, after this calculates PCRF relative free ratio according to the load state of PCRF all in network, the PCRF that the diameter session for newly-built IP-CAN session selects load lower.
Embodiment four
Present embodiment describes visited place PCRF mutual by ownership place proxyDRA and ownership place PCRF, the signaling process of termination diameter session.As shown in Figure 7, each step is described below:
Step 701: visited place V-PCRF receives external trigger (the session termination request of such as BBERF or PCEF request), needs to terminate with ownership place H-PCRF diameter session;
Step 702:V-PCRF sends the request of diameter termination to ownership place proxyH-DRA, and message uses the Session-IdAVP identical with the diameter session of having set up between client and PCRF-1;
Step 703: by checking the Session-IDAVP of step 702 message, H-DRA authenticates to a DRA for this IP-CAN session and binds (pointing to H-PCRF-1);
Step 704:H-DRA forwards diameter termination request message to target H-PCRF-1.If the inquiry timer of the H-PCRF-1 now in H-DRA is overtime, and H-DRA not yet sends inquiry request, then H-DRA also should add band PCRF status poll instruction in diameter terminates request message;
Step 705: the status poll instruction that diameter terminates in request message detected, the session that H-PCRF-1 termination is corresponding also returns S9diameter response message (comprising the current state information of H-PCRF-1, as idle capacity etc.) to H-DRA;
Step 706:H-DRA by corresponding diameter session tokens for terminate.If the diameter session of this UE is terminated all, so DRA binding also can be deleted;
The S9diameter response message of step 707:H-DRA analyzing step 705, obtains the state information of H-PCRF-1, and from message, delete this part, then message is transmitted to the V-PCRF of visited place.H-DRA restarts the status poll timer of H-PCRF-1.
So far, proxyH-DRA have updated the load information of H-PCRF-1, after this calculates PCRF relative free ratio according to the load state of PCRF all in home network, the PCRF that the diameter session for newly-built IP-CAN session selects load lower.
Embodiment five
Under present embodiment describes non-roaming scene, perform PA1 (namely client is always mutual by proxyDRA and PCRF), the signaling process of amendment diameter session.The present embodiment is equally applicable to visited place client revises diameter session scene by visited place DRA.As shown in Figure 8, each step is described below:
The client of step 801:proxyDRA receives external trigger (such as IP-CAN session modification request), needs to send amendment diameter request message to corresponding PCRF;
Step 802:Client sends amendment diameter request message to proxyDRA;
Step 803:ProxyDRA authenticates to the DRA binding (pointing to PCRF-1) of a step 802 queued session association;
Step 804:DRA forwards diameter request message to target P CRF-1.If the inquiry timer of the PCRF-1 now in DRA is overtime, and DRA not yet sends inquiry request, then DRA also should add band PCRF status poll instruction in diameter request message;
Step 805: the status poll instruction in diameter request message detected, PCRF-1 returns diameter response message (comprising the current state information of PCRF-1, as idle capacity etc.) to DRA;
The diameter response message of step 806:DRA analyzing step 805, obtains the state information of PCRF-1, and from message, delete this part, then message is transmitted to client.DRA restarts the status poll timer of PCRF-1.
So far, proxyDRA have updated the load information of PCRF-1, after this calculates PCRF relative free ratio according to the load state of PCRF all in network, the PCRF that the diameter session for newly-built IP-CAN session selects load lower.
Embodiment six
Under present embodiment describes roaming scence, perform PA1, visited place V-PCRF mutual by ownership place proxyH-DRA and ownership place H-PCRF, the signaling process of amendment diameter session.As shown in Figure 9, each step is described below:
Step 901: visited place V-PCRF receives inside or external trigger, needs to send diameter message to ownership place PCRF on S9 interface;
Step 902:V-PCRF sends diameter session updates (such as S9 session modification request) message on S9 interface, and is received by the proxyH-DRA of ownership place;
The DRA that step 903:ProxyH-DRA authenticates to the session association that is asked with step 902 binds (pointing to H-PCRF-1);
Step 904:H-DRA forwards diameter session updates message to target H-PCRF-1.If the inquiry timer of the H-PCRF-1 now in H-DRA is overtime, and H-DRA not yet sends inquiry request, then H-DRA also should add band PCRF status poll instruction in diameter session updates message;
Step 905: the status poll instruction in diameter session updates message detected, H-PCRF-1 returns diameter response message (comprising the current state information of H-PCRF-1, as idle capacity etc.) to H-DRA;
The diameter response message of step 906:H-DRA analyzing step 905, obtains the state information of H-PCRF-1, and from message, delete this part, then message is transmitted to the V-PCRF of visited place.H-DRA restarts the status poll timer of H-PCRF-1.
So far, proxyH-DRA have updated the load information of H-PCRF-1, after this calculates PCRF relative free ratio according to the load state of PCRF all in home network, the PCRF that the diameter session for newly-built IP-CAN session selects load lower.
In order to realize above method, flow process, what the present invention also provided a kind of control PCRF load balancing realizes system, and as shown in Figure 10, this system comprises connected Diameter route agent DRA and several PCRF, wherein:
Described DRA comprises the message processing module, the PCRF that are connected and selects module, the time block be connected with described message processing module and the messaging interface be connected with described message processing module, wherein, described message processing module is used for inserting load condition inquiry instruction in the diameter message sent at the PCRF pointed to DRA binding, resolve the current loading condition information that described PCRF returns, and therefrom delete PCRF load state information;
Described message processing module inserts described load condition inquiry instruction sending in the Diameter session request of PCRF, renewal or ending message, and described PCRF sends current loading condition information by response message to described DRA.
Described PCRF selects module, for according to all PCRF current loading condition information obtained, applies mechanically Dynamic Load-balancing Algorithm, newly-built diameter session is directed to the lower PCRF of load.Under initialized state, it is zero load that this module all gives tacit consent to all PCRF;
Described time block, for notifying described message processing module when timing arrives, described message processing module judges timer expiry and in timing cycle and when not sending PCRF status poll instruction to described PCRF after time-out, in described Diameter request, upgrades or carry described PCRF status poll instruction in termination conversation message; Also for receive described PCRF send response message after, restart described time block.
Described messaging interface is used for sending to diameter session related network elements and PCRF or receiving diameter message, and described network element comprises strategy and charge execution function PCEF, bearing binding and event reporting function BBERF, application function AF network element.
Described PCRF, for receiving the diameter message that described DRA sends, and returns to described DRA the response message carrying current loading condition information according to load condition inquiry instruction wherein.
The inventive method and system are by the current loading condition information by DRA active obtaining PCRF, and the idle capacity ratio of all PCRF is obtained according to dynamic algorithm, newly-built diameter session is directed to the lower PCRF of load, thus achieves the load balancing between the multiple PCRF under DRA regulation and control.
Claims (7)
1. an implementation method for control PCRF load balancing, is characterized in that, the method comprises:
Information gathering procedure, Diameter route agent DRA from DRA binding point to strategy and charge execution function PCRF obtain described PCRF current loading condition information;
PCRF selects step, and described DRA, according to all PCRF current loading condition information obtained, uses Dynamic Load-balancing Algorithm, is the PCRF that newly-built diameter session selects load lower;
Wherein, described information gathering step performs after creating, verify or delete described DRA binding, specifically comprises:
Described DRA sends Diameter conversation message to PCRF, wherein carries PCRF status poll instruction;
Described PCRF returns response message to described DRA, wherein carries described PCRF current loading condition information after receiving inquiry instruction;
Described DRA receives described response message, obtains described PCRF current loading condition information;
After described DRA receives described response message, described load state information is wherein deleted, be transmitted to the network element relevant to described diameter session again, described network element comprises strategy and charge execution function PCEF, bearing binding and event reporting function BBERF or application function AF network element.
2. the method for claim 1, it is characterized in that: described DRA arranges and inquires about timer for each PCRF or all PCRF, before described DRA sends described Diameter conversation message to described PCRF, judge timer expiry and in timing cycle and when not sending PCRF status poll instruction to described PCRF after time-out, in described Diameter conversation message, carry described PCRF status poll instruction; Described DRA restarts the inquiry timer of described PCRF after receiving the response message of described PCRF transmission.
3. method as claimed in claim 1 or 2, is characterized in that: described Diameter conversation message is Diameter conversation request message, Diameter session updates message or Diameter session termination message.
4. method as claimed in claim 1 or 2, is characterized in that: described method is applicable to roaming scence and non-roaming scene.
5. control PCRF load balancing realize a system, it is characterized in that, this system comprise connected Diameter route agent DRA and several strategy and charge execution function PCRF, wherein:
Described DRA comprises the message processing module and PCRF selection module that are connected, and the messaging interface be connected with described message processing module, wherein,
Described message processing module is used for inserting load condition inquiry instruction in the diameter message sent at the PCRF pointed to DRA binding, and resolves the current loading condition information that described PCRF returns; Also delete current loading condition information in the response message that returns from PCRF;
Described PCRF selects module, for according to all PCRF current loading condition information obtained, uses Dynamic Load-balancing Algorithm, newly-built diameter session is directed to the lower PCRF of load;
Described messaging interface is used for sending diameter message to described PCRF and receives the response message that described PCRF returns; Also for sending to diameter session related network elements or receiving diameter message, described related network elements comprises strategy and charge execution function PCEF, bearing binding and event reporting function BBERF or application function AF network element;
Described PCRF, for receiving the diameter message that described DRA sends, and returns to described DRA the response message carrying current loading condition information according to described load condition inquiry instruction.
6. realize system as claimed in claim 5, it is characterized in that: described DRA also comprises the time block be connected with described message processing module, described time block is used for notifying described message processing module when timing arrives, described message processing module judges timer expiry and in timing cycle and when not sending PCRF status poll instruction to described PCRF after time-out, carries described PCRF status poll instruction in described Diameter message; Described message processing module also for receive described PCRF send response message after, restart described time block.
7. as described in claim 5 or 6, realize system, it is characterized in that: described message processing module send in the Diameter session request of described PCRF, renewal or ending message insert described load condition inquiry instruction, described PCRF sends its current loading condition information by response message to described DRA.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN200910165689.2A CN101998515B (en) | 2009-08-18 | 2009-08-18 | The implementation method of control PCRF load balancing and realize system |
| PCT/CN2010/075949 WO2011020419A1 (en) | 2009-08-18 | 2010-08-12 | Implementation method, system and diameter routing agent (dra) for controlling load balance of policy and charging rules function (pcrf) entity |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910165689.2A CN101998515B (en) | 2009-08-18 | 2009-08-18 | The implementation method of control PCRF load balancing and realize system |
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| CN101998515A CN101998515A (en) | 2011-03-30 |
| CN101998515B true CN101998515B (en) | 2015-12-16 |
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| WO2013059957A1 (en) * | 2011-10-25 | 2013-05-02 | Hewlett-Packard Development Company, L.P. | Load balancing for charging system clusters |
| CN104303473B (en) * | 2013-05-06 | 2019-02-05 | 华为技术有限公司 | The flow control methods and device of network are shared by operator |
| CN105591930A (en) * | 2014-10-24 | 2016-05-18 | 中兴通讯股份有限公司 | Method and equipment for routing forwarding |
| CN110944361B (en) * | 2018-09-21 | 2022-02-11 | 华为技术有限公司 | Method and network element for load balancing |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101399746A (en) * | 2007-09-26 | 2009-04-01 | 华为技术有限公司 | Packet routing method, system, device and method, system for selecting backup resource |
| CN101499919A (en) * | 2008-01-28 | 2009-08-05 | 华为技术有限公司 | Managing method, network element and network system for policy decision entity |
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| TW595159B (en) * | 2003-04-04 | 2004-06-21 | Admtek Inc | Load balancing method of wireless local area network |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101399746A (en) * | 2007-09-26 | 2009-04-01 | 华为技术有限公司 | Packet routing method, system, device and method, system for selecting backup resource |
| CN101499919A (en) * | 2008-01-28 | 2009-08-05 | 华为技术有限公司 | Managing method, network element and network system for policy decision entity |
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| CN101998515A (en) | 2011-03-30 |
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