CN105592494A - Method of equalizing pool capacity of mobility management entity - Google Patents

Abstract

The invention discloses a method of equalizing the pool capacity of a mobility management entity (MME), aiming at solving the problem that a current method based on a static distribution service request requires one to modify data manually or adjust device configuration to solve the capacity or load equalization problem when a network capacity or load changes. The method of the invention can not only be applied to a 2G/3G network, but also can be applied to a 4G network. The method comprises: 1, starting up user equipment (UE), and monitoring the measuring value of a serving cell and an adjacent cell so as to trigger cell selection and cell reselection, thereby guaranteeing a cell to stay in a best cell as much as possible, and after the cell stays in an appropriate cell, first initializing a random access process, i.e., message 1; and a radio network node base station controller (BSC)/radio network controller (RNC) sending an uplink NAS transport message to a serving GPRS support node (SGSN), including 17 steps of NAS attach complete, and activate default EPS bearer context accept messages.

Description

A kind of method of balanced mobility management apparatus tankage

Technical field

The present invention relates to one and belong to wireless communication field data service capacity equalization methods, more particularly,The present invention relates to the method for the balanced mobility management apparatus tankage of a kind of core network packet-domain.

Background technology

Long Term Evolution (LTE, LongtermEvolution) is the third generation cooperation partner of International Organization for standardizationCompanion's plan (3GPP, ThirdgenerationpartnershipProject) is formulated, and is considering nextFor network architecture aspect, require network flattening, Internet protocol (IP, InternetProtocol) pointGroupization, thus realize the demand of the large capacity of communication network, high bandwidth, high efficiency exchange evolution, therefore LTESystem adopts Internet protocol.

GPRS (GPRS, GeneralPacketRadioService) mainly provides and movesMoving 2G/3G data service, supporting node (SGSN, ServingGPRS in GPRSSupportNode) be GPRS core net important component part, mainly complete packet data package routing forwarding,The functions such as mobile management, session management, Logical Link Management, authentication and encryption, ticket generation and output.In tradition mobile communications network, wireless network node base station controller (BSC, a BaseStationController)/radio network controller (RNC, RadioNetworkController) can only connectA supporting node SGSN.

Along with mobile broadbandization is accelerated, GPRS is also in continuous evolution, the block core of evolutionNet (EPC, EvolvedPacketCore) mainly provides the 4th third-generation mobile communication technology (4G) data service,Mobility management apparatus (MME, MobilityManagementEntity) is that Long Term Evolution core net is importantPart, is mainly responsible for the management of user's chain of command. 4G base station (eNodeB) is multi-to-multi with MMEFully connected topology, MME need manage thousands of network elements simultaneously.

Maximize for reaching existing network apparatus value, common carrier generally adopts and shares 2G/3G/4G core netMode, to existing network 2G/3G device upgrade and transformation, has unified chain of command and user's face, simplified network structure,Existing network SGSN upgrading becomes to support 2G/3G/4G converged CN equipment SGSN/MME.

Resources of core network pond is that 3GPP is organized in the R5 stage and proposes, and has been widely used at present among existing network.SGSN/MMEPool (converged CN resource pool) forms multiple SGSN/MME (converged CN equipment)A SGSN/MME pond (Pool), each SGSN/MME in the BSC/RNC/eNodeB that pond covers and pondConnecting respectively, is its BSC/RNC/eNodeB covering by all SGSN/MME in SGSN/MMEPool jointlyService. The networking mode of resources of core network stored reservoir has changed original network topology structure, can be by oneWireless network node is connected on many cover SGSN/MME. SGSN to the management of 2G/3G base station be by BSC andRNC node is realized; 4G base station (eNodeB) is directly connected with MME, configuring MME Pool on eNodeBIn the services addresses data of each MME.

NAS Node Selection Function (NNSF, NASNodeSelectionFunction), wirelessAccess Network (RAN, RadioAccessNetwork) node is subscriber equipment (UE, User by NNSF functionEquipment) initial Non-Access Stratum (NAS, the NonAccessStratum) signaling of putting forward is selected oneSuitable route, sends it to suitable SGSN/MME node, and SGSN/MME network exists two kinds of node choosingsSelection method:

It is according to each in pond that 2G/3G service node selection mode: BSC/RNC acts on behalf of NAS node selection functionSGSN capacity is manually set capacity factor measure by webmaster, when UE is registered in SGSNPool for the first timeWhen SGSN, this SGSN will contain local exchange network resource identifier (NRI, NetworkResourceIdentifier) user's temporary mark is distributed to UE. When initiating business again, UE will carry NRI information,The mapping relations of the each NRI of configuration and SGSN in BSC/RNC, BSC/RNC receives after upper message of UE, obtainsGet NRI value, if NRI has corresponding SGSN, be forwarded to corresponding SGSN, otherwise by each SGSN loadThe ratio of sharing is selected at random, and the SGSN of " unloading " or " forbidding " state is not in range of choice.The business of utilizing NRI information that UE is initiated is routed to the SGSN that NRI is corresponding by BSC/RNC. BSC/RNC rootDetermine load sharing ratio according to configuration SGSN node capacity.

4G service node selection mode a: eNodeB is connected with the multiple MME in MMEPool, when buildingWhen vertical special S1 (interface name between eNodeB and MME) is connected, need to select a serving MME for UE.ENodeB selects according to " load weight " ratio corresponding to each MME, and the load weighted value of MME passes throughS1 sends to eNodeB in the district of pond. MME load weighted value adds according to other MME node active volume in PoolTo arrange, load weighted value carries to eNodeB by S1. MMEPool characteristic is that multiple MME are simultaneouslyIdentical wireless zone service, realizes resource-sharing, traffic load sharing between MME in Pool. UE accessWhich MME is relevant with the load balancing strategy of eNodeB, and therefore eNodeB needs the equipment state of perception MME.If it is unavailable to detect MME, need to adjust in time load balancing strategy, by new access service request messageDistribute to the MME of other normal condition.

Because the load information of core network node is generally among dynamic change, and prior art providesWhich is the mode of a kind of " static state ", and the weight setting can temporal evolution, allows to according to coreLoad information after heart network node changes is adjusted weight, also needs manually to reconfigure, and has oneFixed hysteresis quality. What as can be seen here, prior art provided determines core network joint according to pre-assigned weightThe mode of some load information is difficult to determine the real-time load information of core network node, and makes network structure moreFor complexity, data creating is more complicated, and engineering cutover is more complicated.

In addition, the degree of support difference of different manufacturers to weight, the support of most producers equipment is saved according to core networkSelection percentage is shared in some SGSN/MME capacity configuration; But indivedual producers equipment only supports to wait capacity pro rate,Cannot manual configuration weight, for this reason, there are non-capacity and two kinds of patterns such as the capacity of grade of waiting in prior art. The appearance such as non-Amount pattern is by each network element in SGSN/MMEpool according to capacity planning such as non-grade, and wireless side is held according to SGSN/MMEAmount ratio is selected node. SGSN/MME dilatation or capacity adjustment, while causing load sharing ratio to change, synchronousCause that wireless BSC/RNC/eNodeB configuration shares operation sequential. The non-capacity model that waits can increase joining of wireless sidePut operation, and be unfavorable for capacity equilibrium. Deng capacity planning by hardware handles ability and the access customer number of equipmentIdentical, corresponding wireless side equal proportion is selected SGSN/MME node. In the time of SGSN/MME dilatation or capacity adjustment,Require hardware handles ability and the software of each network element identical, need to be to all network element unified planning capacity. When newlyWhile building SGSN/MME, require newly-built SGSN/MME and existing network SGSN/MME to there is identical hardware handles ability,Invest huge. Deng capacity model be to non-wait capacity improve, but can bring network planning complexity andInvest huge problem.

If new SGSN/MME network element enters Pool, or the services addresses of SGSN/MME changes, or SGSN/MMEPlace capacity change, all BSC/RNC/eNodeB nodes interconnected with this SGSN/MMEPool are completeConfiguration data need to be revised by portion, thinks by analysis, and existing network adopts the side based on static distributing data service requestMethod quantities is very big, and accuracy is difficult to guarantee, and is difficult to revise at short notice, has SGSN/MMEWith the inconsistent hidden network danger of BSC/RNC/eNodeB data configuration, affect user awareness. Transform based on existing network" static state " mode, bring networking mode underaction, the network planning and safeguard comparatively complicatedly, invests high.

Summary of the invention

Technical problem to be solved by this invention is the method based on static distribution service request in prior art,In the time that network capacity or load change, need manual modification data or adjustment equipment configuration solution capacity orThe problem of load balancing, provides a kind of method of balanced mobility management apparatus tankage.

For solving the problems of the technologies described above, the present invention adopts following technical scheme to realize: described 2G/3GIn network, a kind of step of method of balanced mobility management apparatus tankage is as follows:

1) subscriber equipment start, by the monitoring to Serving cell and measurements of neighboring cells value, comes triggering cellSelect and cell reselection, at utmost to ensure that subscriber equipment resides in a best community, resident arrivingBehind suitable community, first initiating random access procedure, i.e. message 1;

2) wireless network node base station controller/radio network controller detects after message 1, establishes to userPreparation is sent accidental access response message 2;

3) subscriber equipment is received after random response message 2, to wireless network node base station controller/wireless networkNetwork controller sends radio resource request message;

4) wireless network node base station controller/radio network controller please to subscriber equipment transmission Radio ResourceAsk response message, comprise and set up Signaling Radio Bearer, beared information and wireless resource configuration;

5) subscriber equipment completes and sets up Signaling Radio Bearer and radio-resource-configuration, to wireless network node base stationController/radio network controller sends radio resource request and completes message, comprises Non-Access Stratum and adheres to request letterBreath;

6) the automatic disaster tolerance switch function module Real-Time Monitoring PSMG duty of management function module PSMG,If primary PSMG breaks down, start PSMG for subsequent use, the control of wireless network node base station controller/wireless networkDevice processed sends access request message 3 to the PSMG virtual address management function of normal work, and PSMG detectsAfter message 3, PSMG triggers business balance module, according to serving support node load in resources of core network pondSituation is distributed to negative by the service request of newly receiving wireless network node base station controller/radio network controllerThe supporting node that lotus is lower;

7) on supporting node sends initially to wireless network node base station controller/radio network controllerBelow set up request message, request set up default bearing, comprise Non-Access Stratum adhere to receptions, activate give tacit consent toGPRS bearer context request message;

8) wireless network node base station controller/radio network controller receives initial context and sets up requestMessage, if do not comprise capability information of user facility, wireless network node base station controller/wireless network controlDevice processed sends capabilities of user devices apply for information, inquiring user capacity of equipment to subscriber equipment;

9) subscriber equipment sends subscriber equipment energy to wireless network node base station controller/radio network controllerForce information message, reporting user facility ability information;

10) wireless network node base station controller/radio network controller is established to supporting node transmission userStandby ability information Indication message, the capability information of user facility of renewal supporting node;

11) according to initial context, the request of setting up disappears wireless network node base station controller/radio network controllerThe security information that in breath, subscriber equipment is supported, sends safe mode to subscriber equipment and completes message, carries out safetyActivate;

12) subscriber equipment is complete to wireless network node base station controller/radio network controller transmission safe modeBecome message, represent that safe activation completes;

13) according to initial context, the request of setting up disappears wireless network node base station controller/radio network controllerThe RAB of the evolution in breath is set up information, and send and carry out resources for user equipment reprovision to subscriber equipment,Comprise reprovision Signaling Radio Bearer 1 and radio-resource-configuration, set up Signaling Radio Bearer 2, Data Radio Bearer,Comprise default bearing;

14) subscriber equipment sends Radio Resource control to wireless network node base station controller/radio network controllerThe reconstruct that system connects completes message, represents that resource distribution completes;

15) on wireless network node base station controller/radio network controller sends initially to supporting nodeBelow set up response message, show that customer equipment context set up;

16) subscriber equipment sends on subscriber equipment to wireless network node base station controller/radio network controllerRow transmission of messages message, comprising Non-Access Stratum, to have adhered to, activated the evolved packet system carrying of acquiescence upper and lowerLiterary composition request message;

17) wireless network node base station controller/radio network controller sends up non-to supporting nodeAccess Layer message transfer, comprising Non-Access Stratum, to have adhered to, activated the evolved packet system carrying of acquiescence upper and lowerLiterary composition message.

In described 4G network, a kind of step of method of balanced mobility management apparatus tankage is as follows:

1) subscriber equipment start, by the monitoring to Serving cell and measurements of neighboring cells value, comes triggering cellSelect and cell reselection, at utmost to ensure that subscriber equipment resides in a best community, resident arrivingBehind suitable community, first initiating random access procedure, i.e. message 1;

2) 4G base station detects after message 1, sends accidental access response message, i.e. message 2 to subscriber equipment;

3) subscriber equipment is received after random response message 2, sends radio resource request message to 4G base station;

4) 4G base station sends radio resource request response message to subscriber equipment, comprises and sets up Signaling Radio Bearer1 beared information and wireless resource configuration;

5) subscriber equipment completes Signaling Radio Bearer 1 and carries and radio-resource-configuration, sends nothing to 4G base stationLine resource request message, comprises Non-Access Stratum and adheres to solicited message;

6) disaster tolerance switch function is realized Real-Time Monitoring management functional module PSMG duty, normal work automaticallyThe PSMG doing implements virtual address function, and 4G base station sends access request message 3 to this PSMG, and PSMG touchesSending service balance module, newly receives wireless side according to mobility management apparatus load condition in resources of core network pondThe service request of 4G base station is distributed to the mobility management apparatus that load is lower, and 4G establishes to mobile management base stationPreparation send initial context to set up request message, comprises Non-Access Stratum and adheres to solicited message;

7) mobility management apparatus sends initial context and sets up request message to 4G base station, and request is set up silentRecognize carrying, comprise that Non-Access Stratum adheres to reception, the packet-based core networks service bearer of evolution that activates acquiescence is upper and lowerLiterary composition request message;

8) 4G base station receives initial context and sets up request message, if do not comprise capability information of user facility,4G base station sends capabilities of user devices apply for information, inquiring user equipment message to subscriber equipment;

9) subscriber equipment sends capability information of user facility, reporting user facility ability information to 4G base station;

10) 4G base station sends capability information of user facility Indication message to mobility management apparatus, upgrades mobileThe capability information of user facility of property management equipment;

11) security information that in request message, subscriber equipment is supported is set up according to initial context in 4G base station, toSubscriber equipment sends safe mode and completes message, carries out safe activation;

12) subscriber equipment sends safe mode and completes message to 4G base station, represents that safe activation completes;

13) RAB that the evolution in request message is set up according to initial context in 4G base station is set up letterBreath, completes message to subscriber equipment transmission safe mode and carries out resources for user equipment reprovision, comprises reprovision signalingRadio bearer 1 and radio-resource-configuration, set up Signaling Radio Bearer 2, Data Radio Bearer, comprise giving tacit consent to and holdCarry;

14) subscriber equipment completes message to the reconstruct of 4G base station transmission Radio Resource control connection, represents resourceConfiguration completes;

15) 4G base station sends initial context to mobility management apparatus and sets up response message, shows that user establishesStandby context has been set up;

16) subscriber equipment sends subscriber equipment upstream message to 4G base station, comprise Non-Access Stratum adhered to,Activate the evolved packet system bearer context request message of acquiescence;

17) 4G base station sends up Non-Access Stratum message transfer to mobility management apparatus, comprises Non-Access StratumAdhere to, activated the evolved packet system loading context information of acquiescence.

Compared with prior art the invention has the beneficial effects as follows:

1. the method for existing network based on static distribution service request, cannot automatic equalization MME/SGSN pond in network elementLoad and capacity, can only rely on webmaster manual modification data or adjust capacity factor measure to reach equally loaded, the partyMethod maintenance cost is high, and data configuration consistent is poor, affects user awareness. Balanced mobility of the present inventionThe method of management equipment tankage provides a kind of method of automatic distributing service request, can be according to carrying virtuallyLocation and algorithm automatic equalization capacity and load, the method has been simplified network structure and handling process, has reduced dimensionProtect cost, improved the uniformity of data, promoted user awareness, guaranteed brand value.

2. due to the degree of support difference of producer to weight, wait capacity planning mode can cause utilization rate of equipment and installations low,Invest high. The method of balanced mobility management apparatus tankage of the present invention is by newly-increased packet domain managementFunctional module (PSMG, PacketServiceManagementGateway), has realized automatic mixing and has meltedClose SGSN/MME network element in core net resource pool and share business proportion, improved equipment equilibrium degree and utilization rate.

Brief description of the drawings

Below in conjunction with accompanying drawing, the present invention is further illustrated:

Fig. 1 is PSMG hardware configuration schematic diagram;

Fig. 2 is the network structure logical schematic that adds PSMG;

Fig. 3 is for adding after PSMG business attachment flow figure in 2G/3G network;

Fig. 4 is for adding after PSMG business attachment flow figure in 4G network;

Fig. 5 is BSC/RNC and eNodeB and SGSN/MME interface schematic diagram;

Fig. 6 is the networking structure schematic diagram that adds the SGSN/MMEPool of virtual address management function module;

Fig. 7 is that two kinds of wireless network nodes of 2G/3G/4G network are selected SGSN/MME schematic diagram;

Fig. 8 is the networking structure schematic diagram that adds the SGSN/MMEPool of business balance module;

Fig. 9 is the interconnected schematic diagram of PSMG heartbeat;

Figure 10 is the networking structure schematic diagram of the SGSN/MMEPool of automatic disaster tolerance switch function module

Detailed description of the invention

Below in conjunction with accompanying drawing, the present invention is explained in detail:

Consult Fig. 1, have manually-operated static allocation load weight to carry out balanced core net in order to solve prior artThe method of node load, solves capacity increase and causes dilatation complexity, data configuration complexity, network to adjust complexityAnd invest the problems such as large. The method of balanced mobility management apparatus tankage of the present invention is at network listNewly-increased packet domain management function module (PSMG, PacketServiceManagementGateway) in unit,This module is divided into virtual address management function, automatic service equaliser function, disaster tolerance is switched merit automaticallyEnergy unit three parts, hardware platform is industry interchangeable blade processor platform, comprises power module EGME0, voidPlan address management function unit business disposable plates GEP3, automatic service equaliser function service processing board SCXB,Automatically disaster tolerance switch function unit business disposable plates NWI, 4 blocks of GEP3 plates of standard configuration maximum configured, 8SCXB and 4 NWI. Can be integrated in SGSN/MME frame, in SGSN/MME frame, increase machine frameOr plate card, also can be used as independently unit module.

For reaching goal of the invention, provide function to comprise:

1. virtual address management function: for a SGSN/MMEPool (core that comprises multiple SGSN/MMEHeart net resource pool), for all SGSN/MME in Pool create out a unified virtual service address, allThe BSC/RNC/eNodeB node of access SGSN/MMEPool only need to carry out with this virtual service address alternately.This virtual address is managed by virtual address to the mapping of the practical business address of the each SGSN/MME in PoolModule completes automatically.

2. automatic service equalization function: according to the each SGSN/MME in SGSN/MMEPool (resources of core network pond)(converged CN equipment) is loading condition in real time, automatically calculates proportioning parameter, the distribution of finishing service stream.This function combines with virtual address administration module, carrying out virtual address to the each SGSN/MME in PoolPractical business address mapping time, add proportioning parameter tags, ensure each SGSN/MME's in PoolLoad balancing.

3. automatic disaster tolerance switch function unit: have automatic disaster tolerance switch function unit on each PSMG,Primary, one for subsequent use, adopts the disaster tolerance pattern of " 1+1 is standby mutually ". Once main PSMG occurs abnormal, canAutomatically switch to PSMG for subsequent use and manage, can not have any impact to the business of SGSN/MMEPool,Promote the disaster tolerance ability of SGSN/MMEPool.

For more clear explanation technical scheme of the present invention, Fig. 2 shows and adds PSMG network structure logical schematic.

Respectively for three concrete functions, be described as follows below:

1. virtual address management function module:

When BSC/RNC/eNodeB and SGSN/MME set up business data transmission link, BSC/RNC adopts Gb(interface between BSC and SGSN)/IU (interface between RNC and SGSN) interface carries out transfer of data;ENodeB adopts S1 interface to transmit. BSC/RNC/eNodeB configuration local terminal service IP address and opposite end industryBusiness IP address (SGSN/MME service IP address) completes the foundation of transmission channel. Complete transfer of data logicalAfter the foundation in road, between BSC/RNC/eNodeB and MME, can realize the adhering to of LTE network, tracking area moreThe new regular traffic flow process that waits, Fig. 8 shows BSC/RNC/eNodeB and SGSN/MME interface schematic diagram.

Virtual address management function module can be by the multiple SGSN/MME services addresses in SGSN/MMEPoolVirtual is an empty services addresses, like this BSC/RNC/eNodeB in the time of configuration Gb/Iu/S1 interface data,Only need to carry out data configuration for this virtual address. In the time carrying out data interaction, BSC/RNC/eNodeBService request is sent to virtual address management function module, is accomplished to by virtual address management function moduleThe mapping of the services addresses of each SGSN/MME in Pool. Fig. 6 illustrates and adds virtual address management function moduleThe networking structure schematic diagram of SGSN/MMEPool.

Operation flow is as follows:

Step 1: wireless side BSC/RNC/eNodeB initiating business request flow process, is sent to void by service requestAddress 100.88.255.1.

Step 2: virtual address administration module is received after the service request of BSC/RNC/eNodeB transmission, completedVirtual address is to the mapping of SGSN/MME services addresses.

Step 3: virtual address administration module obtains the SGSN/MME services addresses after mapping, supposes after mappingAddress be 100.88.255.n, be the services addresses of corresponding SGSN/MMEn, administration module is by thisService request is transmitted to this corresponding SGSN/MMEn network element and processes.

Step 4: this SGSN/MMEn (converged CN equipment) network element, will after finishing service request is processedReplying of service request sends to BSC/RNC/eNodeB, completes this operation flow.

2. business equalization function module:

BSC/RNC sets capacity factor measure, root according to each SGSN (setting up Signaling Radio Bearer) capacity in PoolSet up data according to capacity factor measure with each SGSN in Pool and be connected, to reach each SGSN load balancing in Pool.MME issues weight according to each MME capacity in Pool to eNodeB, and eNodeB is according to each in weight and PoolMME sets up data and connects, to reach each MME load balancing in Pool.

BSC/RNC/eNodeB initiating business request is to SGSN/MMEPool, and business balance module can basisIn Pool, each SGSN/MME load condition is carried out data connection, and can be according to the equilibrium of SGSN/MMEPoolDegree situation is fed back to business balance module, automatically carries out the calculating adjustment of capacity factor measure. Fig. 8 showsAdd the networking structure schematic diagram of the SGSN/MMEPool of business equalization function module.

Operation flow is as follows:

Step 1: wireless side BSC/RNC/eNodeB initiating business request SGSN/MMEPool (core net moneyPond, source), business balance module is set up data according to capacity factor measure, and to suitable SGSN/MME, (converged CN is establishedStandby).

Step 2:SGSN/MME is by information on load Real-time Feedback to business balance module, and business balance module willThe information on load of receiving carries out the calculating of Pool equilibrium degree, and result and setting limit value are compared.

Step 3: in the time that Pool equilibrium degree exceedes setting limit value, informing business balance module carries out business automaticallyThe calculating adjustment of distribution, on the contrary distribute by former capacity factor measure.

The volume load parameter of weighing SGSN/MME is " attached users ", and business equalization function module canAutomatically according to the capacity of each SGSN/MME in Pool, adopt load sharing algorithm flexibly to determine load pointLoad ratio, and need in 4G base station eNodeB, not do any configuration, adopt algorithm as follows:

Pool equilibrium degree is the population standard deviation of SGSN/MME utilization rate, reflection be each in PoolThe deviation size of SGSN/MME utilization rate, computing formula is as follows in detail:

If the utilization rate of SGSNn/MMEn is γ n, the actual attached users of γ n=SGSNn/MMEn/SGSN/MMEn software capacity * 100%;

The average utilization of SGSN/MMEn is that (γ 1+ γ 2+ γ n) for γ a=average;

Pool equilibrium degree=(sum ((a) ^2 of γ n-γ)/n) ^ (1/2).

3, automatic disaster tolerance switch function module

In order to ensure the robustness of the automatic management function module of Pool, except every automatic administration module self bladeOutside formula disaster tolerance mechanism, active and standby automatic management function module adopts the mode of " heartbeat " to monitor, once send outExisting primary module operation is undesired, can enable spare module and carry out service bearer, realizes disaster tolerance ability. Fig. 9Show the interconnected schematic diagram of PSMG heartbeat.

Primary automatic administration module and automatic administration module for subsequent use configure identical virtual address data and function,Adopt the mode of " heartbeat " to monitor, undesired when primary module operation, enable immediately spare moduleCarry out service bearer, " smoothly " takes over the whole business of primary automatic administration module. Figure 10 shows and adds certainlyThe networking structure schematic diagram of the SGSN/MMEPool of visibly moved calamity switch function module.

Operation flow

Step 1: wireless side BSC/RNC/eNodeB initiating business request SGSN/MMEPool (core net moneyPond, source).

Step 2: service request is set up (the fusion core to suitable SGSN/MME by primary automatic administration moduleNet equipment), automatic administration module for subsequent use adopts the mode of " heartbeat " to carry out primary automatic administration module monitoring,And synchronize with primary automatic administration module data.

Step 3: once find that primary automatic administration module breaks down, enable in real time automatic administration module for subsequent use,Keep former data link working properly.

Consult Fig. 3, the side of (in 2G/3G network) balanced mobility management apparatus tankage of the present inventionThe step of method is as follows:

1. user equipment (UE) (UserEquipment) start, by Serving cell and measurements of neighboring cells valueMonitoring, come triggering cell and select and cell reselection, at utmost to ensure that subscriber equipment resides in oneIn Hao community, resident behind suitable community, first initiating random access procedure, i.e. message1(Message1)；

2.BSC (wireless network node base station controller)/RNC (radio network controller) detects Message1After, send accidental access response message 2, i.e. Message2 to UE;

3.UE receives after random response Message2, sends radio resource request (RRC to BSC/RNCConnectionRequest) message;

4.BSC/RNC sends radio resource request response message to UE, comprise set up Signaling Radio Bearer (SRB,SignallingRadioBearers), beared information and wireless resource configuration;

5.UE completes SRB (setting up Signaling Radio Bearer) and radio-resource-configuration, sends nothing to BSC/RNCLine resource request completes (RRCConnectionSetupComplete) message, comprise NAS layer adhere to pleaseAsk (Attachrequest) information;

6.PSMG (management function module) is disaster tolerance switch function module Real-Time Monitoring PSMG duty automatically,If primary PSMG breaks down, start PSMG for subsequent use, BSC/RNC is to the PSMG virtual address of normal workManagement function sends access request (ConnectionRequest) message 3 (Message3), PSMGDetect after Message3, PSMG triggers business balance module, will be new according to SGSN load condition in PoolThe service request of receiving wireless side BSC/RNC is distributed to the SGSN that load is lower;

7.SGSN (supporting node) is to BSC (wireless network node base station controller)/RNC (wireless networkNetwork controller) transmission initial context foundation request (INITIALCONTEXTSETUPREQUEST) message,Default bearing is set up in request, comprises the GPRS that NAS layer adheres to reception (AttachAccept), activates acquiescenceBearer context request (ActivatedefaultEPSbearercontextrequest) message;

8.BSC/RNC receives initial context and sets up request (INITIALCONTEXTSETUPREQUEST)Message, if do not comprise UE ability information, BSC/RNC sends UE performance inquiry (UECapability to UEEnquiry) message, inquiry UE ability;

9.UE sends UE ability information (UECapabilityInformation) message to BSC/RNC,Report UE ability information;

10.BSC (wireless network node base station controller)/RNC (radio network controller) is to SGSN (clothesBusiness support node) transmission UE ability information instruction (UECAPABILITYINFOINDICATION) message,Upgrade the UE ability information of SGSN;

11.BSC/RNC sets up request (INITIALCONTEXTSETUPREQUEST) according to initial contextThe security information that in message, UE supports, sends safe mode to UE and completes (SecurityModeComplete)Message, carries out safe activation;

12.UE sends safe mode to BSC/RNC and completes (SecurityModeComplete) message, representsSafe activation completes;

13.BSC/RNC sets up request (INITIALCONTEXTSETUPREQUEST) according to initial contextThe RAB (ERAB, EvolvedRadioAccessBearer) of the evolution in message is set up letterBreath, reconstruct (RRCConnectionReconfiguration) message that sends RRC connection to UE is carried out UEResource reprovision, comprises reprovision SRB1 and radio-resource-configuration, sets up SRB2, Data Radio Bearer (DRB, DataRadioBearer) (comprise default bearing);

The reconstruct that 14.UE sends RRC connection to BSC/RNC completes (RRCConnectionReconfigurationComplete) message, represents that resource distribution completes;

15.BSC/RNC sends initial context to SGSN (supporting node) and sets up response (INITIALCONTEXTSETUPRESPONSE) message, shows that UE context set up;

16.UE sends UE upstream message transmission (ULInformationTransfer) message to BSC/RNC,Comprise the EPS bearer context request that NAS layer has adhered to (AttachComplete), activated acquiescence(ActivatedefaultEPSbearercontextaccept) message;

17.BSC/RNC sends up NAS transmission (UPLINKNASTRANSPORT) message to SGSN, comprisesNAS layer has adhered to (AttachComplete), has activated the EPS bearer context (Activate of acquiescenceDefaultEPSbearercontextaccept) message.

Consult Fig. 4, the method for (in 4G network) balanced mobility management apparatus tankage of the present inventionStep is as follows: mobility management apparatus (MME, MobilityManagementEntity) is Long Term EvolutionCore net important component part, is mainly responsible for the management of user's chain of command.

1. user equipment (UE) (UserEquipment) start, by Serving cell and measurements of neighboring cells valueMonitoring, come triggering cell and select and cell reselection, at utmost to ensure that subscriber equipment resides in oneIn Hao community, resident behind suitable community, first initiating random access procedure, i.e. message 1(Message1)；

2.4G base station (eNodeB) detects after Message1, sends accidental access response message to UE,Be Message2 message;

3.UE receives after random response message Message2, sends radio resource request (RRC to eNodeBConnectionRequest) message;

4.eNodeB sends radio resource request (RRCConnectionSetup) response message to UE, bagContaining setting up SRB1 beared information and wireless resource configuration;

5.UE completes SRB1 carrying and radio-resource-configuration, sends radio resource request (RRC to eNodeBConnectionSetupComplete) message, comprises NAS layer Attachrequest information;

6. disaster tolerance switch function is realized Real-Time Monitoring PSMG (management function module) duty automatically, normalThe PSMG of work implements virtual address function, and eNodeB sends ConnectionRequest to this PSMG and disappearsBreath, PSMG triggers business balance module, newly receives wireless side eNodeB according to SGSN load condition in PoolService request be distributed to the MME that load is lower (mobility management apparatus), eNodeB sends to MMEINITIALUEMESSAGE message, comprises NAS layer Attachrequest information;

7. mobility management apparatus (MME, MobilityManagementEntity) is to 4G base station (eNodeB)Send INITIALCONTEXTSETUPREQUEST message, default bearing is set up in request, comprises NAS layerAttachAccept, ActivatedefaultEPSbearercontextrequest message;

8.eNodeB receives INITIALCONTEXTSETUPREQUEST message, if do not comprise UE energyForce information, eNodeB sends UECapabilityEnquiry message to UE, inquiry UE ability;

9.UE sends UECapabilityInformation message to eNodeB, report UE ability information;

10.eNodeB sends UECAPABILITYINFOINDICATION message to MME, upgrades MME'sUE ability information;

The safety letter that 11.eNodeB supports according to UE in INITIALCONTEXTSETUPREQUEST messageBreath, sends SecurityModeComplete message to UE, carries out safe activation;

12.UE sends safe mode to eNodeB and completes (SecurityModeComplete) message, representsSafe activation completes;

13.eNodeB sets up request (INITIALCONTEXTSETUPREQUEST) according to initial contextERAB in message sets up information, sends RRCConnectionReconfiguration message enter to UERow UE resource reprovision, comprises reprovision SRB1 and radio-resource-configuration, sets up SRB2, DRB and (comprises giving tacit consent to and holdCarry);

14.UE sends to eNodeB the reconstruct connecting and completes (RRCConnectionReconfigurationComplete) message, represents that resource distribution completes;

15.eNodeB sends INITIALCONTEXTSETUPRESPONSE response message to MME, showsUE context has been set up;

16.UE sends ULInformationTransfer message to eNodeB, comprises NAS layer AttachComplete, ActivatedefaultEPSbearercontextaccept message;

17.eNodeB sends to mobility management apparatus (MME, MobilityManagementEntity)The up UPLINKNASTRANSPORT message that direct transfers, comprises NAS layer AttachComplete, ActivateDefaultEPSbearercontextaccept message.

For make this programme technical problem to be solved, technical scheme and effect is clearer, understand, withUnder this programme is further elaborated in conjunction with the embodiments. Should be appreciated that concrete reality described hereinExecute example only in order to explain this programme, and be not used in restriction this programme.

Describe the preferred embodiments of the present invention in detail below in conjunction with figure, in embodiment of the present invention Chi district, realize certainlyThe structural representation of moving equalization function system, comprises a PSMG equipment and at least two SGSN nodes.Figure 10 shows the networking structure schematic diagram of the SGSN/MMEPool that adds PSMG.

The business balance module of PSMG (management function module) obtains SGSN/MMEPool (resources of core network pond)The utilization rate of all SGSN/MME (converged CN equipment), calculates now according to Pool equilibrium degree algorithmPool equilibrium degree, if do not exceed limit value, distributes in former ratio, otherwise change distribution ratio,New user is set up to service chaining to the lower SGSN/MME of utilization rate, to reach Pool equilibrium degree at limit valueInterior object.

Embodiment 1 (2G/3G user):

1.2G/3GUE start, selects and cell reselection by community, resident behind suitable community, firstInitiating random access procedure, i.e. MSG1 message;

2.BSC/RNC detects after MSG1 message, sends accidental access response message to UE, and MSG2 disappearsBreath;

3.UE receives after random response message, sends RRCConnectionRequest message to BSC/RNC;

4.BSC/RNC sends RRCConnectionSetup response message to UE, comprises to set up SRB1 and holdInformation carrying breath and wireless resource configuration;

5.UE completes SRB1 carrying and radio-resource-configuration, sends RRCConnectionSetup to BSC/RNCComplete message, comprises NAS layer Attachrequest information;

Step 1～5 complete RRC and connect foundation.

When 6.UE is registered to a SGSN in SGSNPool for the first time, PSMG is according to the distribution ratio of preservingSelect SGSN, BSC/RNC sends INITIALUEMESSAGE message to SGSN, comprises NAS layer AttachRequest information; This SGSN sends INITIALCONTEXTSETUPREQUEST to BSC/RNC and disappearsBreath, default bearing is set up in request, comprises NAS layer AttachAccept, ActivatedefaultGPRSBearercontextrequest message, user's temporary mark (P-TMSI) that distribution is contained to local exchange NRIGive UE. Follow-up, when initiating business again, UE will carry NRI information, and BSC/RNC will utilize NRI information to incite somebody to actionThe business that UE initiates is routed to the SGSN that NRI is corresponding.

7.PSMG completes the route of wireless non-access side gusset BSC/RNC to Pool inner core net node SGSNSelect, and the load condition of the interior each SGSN of PSMG Real-time Obtaining Pool, and calculate Pool equilibrium degree knotReally, by result and setting value (can establish group's challenging value) relatively, when Pool equilibrium degree is during higher than setting value,PSMG triggers business balance module, automatically resets distribution ratio according to SGSN load condition in Pool,The service request of newly receiving wireless side BSC/RNC is distributed to the SGSN that load is lower, has reached negative in PoolLotus equilibrium.

Can find out by case step 7 that PSMG has solved cannot automatic equalization SGSN pond Intranet in prior artLoad and the capacity of unit, realized the automatic equalization between SGSN, thereby avoided certain SGSN to loadCarry, ensured communication network quality, affect user awareness. The PSMG equipment of core-network side in example of the present inventionThe load balancing for the treatment of S GSN node device that can be autonomous, thus realize load balancing between SGSN at coreHeart net side completes, and without changing or upgrading Access Network side apparatus, has reduced terminal and existing wireless accessThe impact of net, is more conducive to the evolution of wireless network.

8.BSC/RNC receives INITIALCONTEXTSETUPREQUEST message, if do not comprise UEAbility information, BSC/RNC sends UECapabilityEnquiry message to UE, inquiry UE ability;

9.UE sends UECapabilityInformation message to BSC/RNC, report UE ability letterBreath;

10.BSC/RNC sends UECAPABILITYINFOINDICATION message to SGSN, upgrades SGSNUE ability information;

The safety letter that 11.BSC/RNC supports according to UE in INITIALCONTEXTSETUPREQUEST messageBreath, sends SecurityModeComplete message to UE, carries out safe activation;

12.UE sends SecurityModeComplete message to BSC/RNC, represents that safe activation completes;

13.BSC/RNC sets up information according to the ERAB in INITIALCONTEXTSETUPREQUEST message,Send RRCConnectionReconfiguration message to UE and carry out UE resource reprovision, comprise reprovisionSRB1 and radio-resource-configuration, set up SRB2, DRB (comprising default bearing);

14.UE sends RRCConnectionReconfigurationComplete message to BSC/RNC,Represent that resource distribution completes;

15.BSC/RNC sends INITIALCONTEXTSETUPRESPONSE response message to SGSN, tableBright UE context has been set up;

16.UE sends ULInformationTransfer message to BSC/RNC, comprises NAS layer AttachComplete, ActivatedefaultEPSbearercontextaccept message;

17.BSC/RNC sends the up UPLINKNASTRANSPORT message that direct transfers to SGSN, comprises NASLayer AttachComplete, ActivatedefaultEPSbearercontextaccept message.

Embodiment 2 (4G user):

1.4GUE start, selects and cell reselection by community, resident behind suitable community, first initiatesRandom access procedure, i.e. message 1 (MSG1);

2.eNodeB detects after MSG1 message, sends accidental access response message, i.e. MSG2 message to UE;

3.UE receives after random response message, sends RRCConnectionRequest message to eNodeB;

4.eNodeB sends RRCConnectionSetup response message to UE, comprises to set up SRB1 and holdInformation carrying breath and wireless resource configuration;

5.UE completes SRB1 carrying and radio-resource-configuration, sends RRCConnectionSetup to eNodeBComplete message, comprises NAS layer Attachrequest information;

Step 1～5 complete RRC and connect foundation.

When 6.4GUE is registered to a MME in MMEPool for the first time, PSMG is according to the distribution ratio of preservingSelect MME, eNodeB sends INITIALUEMESSAGE message to MME, comprises NAS layer AttachRequest information; This MME sends INITIALCONTEXTSETUPREQUEST message to eNodeB,Default bearing is set up in request, comprises NAS layer AttachAccept, ActivatedefaultEPSbearerContextrequest message, user's temporary mark (P-TMSI) that distribution is contained to local exchange NRI is given UE.Follow-up, when initiating business again, UE will carry NRI information, and eNodeB will utilize NRI information that UE is initiatedBusiness be routed to the MME that NRI is corresponding.

7.PSMG completes the route choosing of wireless non-access side gusset eNodeB to Pool inner core net node M MESelect, and the load condition of the interior each MME of PSMG Real-time Obtaining Pool, and calculate Pool equilibrium degree result,By result and setting value (can establish group's challenging value) relatively, when Pool equilibrium degree is during higher than setting value, PSMGTriggering business balance module, resets distribution ratio automatically according to MME load condition in Pool, will newly connectBe distributed to the service request of wireless side eNodeB the MME that load is lower, reached the equilibrium of Pool internal loading.

By case step 7 can find out PSMG solved in prior art cannot automatic equalization MME pond in network elementLoad and capacity, realized the automatic equalization between MME, thereby avoided certain MME traffic overload,Ensure communication network quality, affected user awareness. In example of the present invention, the PSMG equipment of core-network side can be certainlyThe load balancing of main processing MME node device, thus realize load balancing between MME in core-network sideComplete, without changing or upgrading Access Network side apparatus, reduced the shadow to terminal and existing wireless access networkRing, be more conducive to the evolution of wireless network.

8.eNodeB receives INITIALCONTEXTSETUPREQUEST message, if do not comprise UE energyForce information, eNodeB sends UECapabilityEnquiry message to UE, inquiry UE ability;

9.UE sends UECapabilityInformation message to eNodeB, report UE ability information;

10.eNodeB sends UECAPABILITYINFOINDICATION message to MME, upgrades MME'sUE ability information;

The safety letter that 11.eNodeB supports according to UE in INITIALCONTEXTSETUPREQUEST messageBreath, sends SecurityModeComplete message to UE, carries out safe activation;

12.UE sends SecurityModeComplete message to eNodeB, represents that safe activation completes;

13.eNodeB sets up information according to the ERAB in INITIALCONTEXTSETUPREQUEST message,Send RRCConnectionReconfiguration message to UE and carry out UE resource reprovision, comprise reprovisionSRB1 and radio-resource-configuration, set up SRB2, DRB (comprising default bearing);

14.UE sends RRCConnectionReconfigurationComplete message to eNodeB,Represent that resource distribution completes;

15.eNodeB sends INITIALCONTEXTSETUPRESPONSE response message to MME, showsUE context has been set up;

16.UE sends ULInformationTransfer message to eNodeB, comprises NAS layer AttachComplete, ActivatedefaultEPSbearercontextaccept message;

17.eNodeB sends the up UPLINKNASTRANSPORT message that direct transfers to MME, comprises NAS layerAttachComplete, ActivatedefaultEPSbearercontextaccept message.

Claims (2)

1. In 1.2G/3G network, a kind of method of balanced mobility management apparatus tankage, is characterized in that, described inThe step of method of a kind of balanced mobility management apparatus tankage as follows:

   1) subscriber equipment start, by the monitoring to Serving cell and measurements of neighboring cells value, comes triggering cellSelect and cell reselection, at utmost to ensure that subscriber equipment resides in a best community, resident arrivingBehind suitable community, first initiating random access procedure, i.e. message 1;

   2) wireless network node base station controller/radio network controller detects after message 1, establishes to userPreparation is sent accidental access response message 2;

   3) subscriber equipment is received after random response message 2, to wireless network node base station controller/wireless networkNetwork controller sends radio resource request message;

   4) wireless network node base station controller/radio network controller please to subscriber equipment transmission Radio ResourceAsk response message, comprise and set up Signaling Radio Bearer, beared information and wireless resource configuration;

   5) subscriber equipment completes and sets up Signaling Radio Bearer and radio-resource-configuration, to wireless network node base stationController/radio network controller sends radio resource request and completes message, comprises Non-Access Stratum and adheres to request letterBreath;

   6) the automatic disaster tolerance switch function module Real-Time Monitoring PSMG duty of management function module PSMG,If primary PSMG breaks down, start PSMG for subsequent use, the control of wireless network node base station controller/wireless networkDevice processed sends access request message 3 to the PSMG virtual address management function of normal work, and PSMG detectsAfter message 3, PSMG triggers business balance module, according to serving support node load in resources of core network pondSituation is distributed to negative by the service request of newly receiving wireless network node base station controller/radio network controllerThe supporting node that lotus is lower;

   7) on supporting node sends initially to wireless network node base station controller/radio network controllerBelow set up request message, request set up default bearing, comprise Non-Access Stratum adhere to receptions, activate give tacit consent toGPRS bearer context request message;

   8) wireless network node base station controller/radio network controller receives initial context and sets up requestMessage, if do not comprise capability information of user facility, wireless network node base station controller/wireless network controlDevice processed sends capabilities of user devices apply for information, inquiring user capacity of equipment to subscriber equipment;

   9) subscriber equipment sends subscriber equipment energy to wireless network node base station controller/radio network controllerForce information message, reporting user facility ability information;

   10) wireless network node base station controller/radio network controller is established to supporting node transmission userStandby ability information Indication message, the capability information of user facility of renewal supporting node;

   11) according to initial context, the request of setting up disappears wireless network node base station controller/radio network controllerThe security information that in breath, subscriber equipment is supported, sends safe mode to subscriber equipment and completes message, carries out safetyActivate;

   12) subscriber equipment is complete to wireless network node base station controller/radio network controller transmission safe modeBecome message, represent that safe activation completes;

   13) according to initial context, the request of setting up disappears wireless network node base station controller/radio network controllerThe RAB of the evolution in breath is set up information, and send and carry out resources for user equipment reprovision to subscriber equipment,Comprise reprovision Signaling Radio Bearer 1 and radio-resource-configuration, set up Signaling Radio Bearer 2, Data Radio Bearer,Comprise default bearing;

   14) subscriber equipment sends Radio Resource control to wireless network node base station controller/radio network controllerThe reconstruct that system connects completes message, represents that resource distribution completes;

   15) on wireless network node base station controller/radio network controller sends initially to supporting nodeBelow set up response message, show that customer equipment context set up;

   16) subscriber equipment sends on subscriber equipment to wireless network node base station controller/radio network controllerRow transmission of messages message, comprising Non-Access Stratum, to have adhered to, activated the evolved packet system carrying of acquiescence upper and lowerLiterary composition request message;

   17) wireless network node base station controller/radio network controller sends up non-to supporting nodeAccess Layer message transfer, comprising Non-Access Stratum, to have adhered to, activated the evolved packet system carrying of acquiescence upper and lowerLiterary composition message.
2. In 2.4G network, a kind of method of balanced mobility management apparatus tankage, is characterized in that, describedA kind of step of method of balanced mobility management apparatus tankage is as follows:

   1) subscriber equipment start, by the monitoring to Serving cell and measurements of neighboring cells value, comes triggering cellSelect and cell reselection, at utmost to ensure that subscriber equipment resides in a best community, resident arrivingBehind suitable community, first initiating random access procedure, i.e. message 1;

   2) 4G base station detects after message 1, sends accidental access response message, i.e. message 2 to subscriber equipment;

   3) subscriber equipment is received after random response message 2, sends radio resource request message to 4G base station;

   4) 4G base station sends radio resource request response message to subscriber equipment, comprises and sets up Signaling Radio Bearer1 beared information and wireless resource configuration;

   5) subscriber equipment completes Signaling Radio Bearer 1 and carries and radio-resource-configuration, sends nothing to 4G base stationLine resource request message, comprises Non-Access Stratum and adheres to solicited message;

   6) disaster tolerance switch function is realized Real-Time Monitoring management functional module PSMG duty, normal work automaticallyThe PSMG doing implements virtual address function, and 4G base station sends access request message 3 to this PSMG, and PSMG touchesSending service balance module, newly receives wireless side according to mobility management apparatus load condition in resources of core network pondThe service request of 4G base station is distributed to the mobility management apparatus that load is lower, and 4G establishes to mobile management base stationPreparation send initial context to set up request message, comprises Non-Access Stratum and adheres to solicited message;

   7) mobility management apparatus sends initial context and sets up request message to 4G base station, and request is set up silentRecognize carrying, comprise that Non-Access Stratum adheres to reception, the packet-based core networks service bearer of evolution that activates acquiescence is upper and lowerLiterary composition request message;

   8) 4G base station receives initial context and sets up request message, if do not comprise capability information of user facility,4G base station sends capabilities of user devices apply for information, inquiring user equipment message to subscriber equipment;

   9) subscriber equipment sends capability information of user facility, reporting user facility ability information to 4G base station;

   10) 4G base station sends capability information of user facility Indication message to mobility management apparatus, upgrades mobileThe capability information of user facility of property management equipment;

   11) security information that in request message, subscriber equipment is supported is set up according to initial context in 4G base station, toSubscriber equipment sends safe mode and completes message, carries out safe activation;

   12) subscriber equipment sends safe mode and completes message to 4G base station, represents that safe activation completes;

   13) RAB that the evolution in request message is set up according to initial context in 4G base station is set up letterBreath, completes message to subscriber equipment transmission safe mode and carries out resources for user equipment reprovision, comprises reprovision signalingRadio bearer 1 and radio-resource-configuration, set up Signaling Radio Bearer 2, Data Radio Bearer, comprise giving tacit consent to and holdCarry;

   14) subscriber equipment completes message to the reconstruct of 4G base station transmission Radio Resource control connection, represents resourceConfiguration completes;

   15) 4G base station sends initial context to mobility management apparatus and sets up response message, shows that user establishesStandby context has been set up;

   16) subscriber equipment sends subscriber equipment upstream message to 4G base station, comprise Non-Access Stratum adhered to,Activate the evolved packet system bearer context request message of acquiescence;

   17) 4G base station sends up Non-Access Stratum message transfer to mobility management apparatus, comprises Non-Access StratumAdhere to, activated the evolved packet system loading context information of acquiescence.