CN102791000B - A kind of method of control load transfer - Google Patents
A kind of method of control load transfer Download PDFInfo
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- CN102791000B CN102791000B CN201210238092.8A CN201210238092A CN102791000B CN 102791000 B CN102791000 B CN 102791000B CN 201210238092 A CN201210238092 A CN 201210238092A CN 102791000 B CN102791000 B CN 102791000B
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Abstract
The embodiment of the invention discloses the method for a kind of control load transfer, first described method obtains the information of chain of command node overload, then will send to the signaling buffer memory of described chain of command node, or descend signaling to chain of command node selectively according to business information.The method of the control load transfer provided by the embodiment of the present invention, can when network node overload, the signaling that selectable processing priority is not high, or all signalings that should be handed down to network node of buffer memory, again successively by the transmitting signaling downwards of buffer memory after network node load restoration is normal, effectively alleviate the load of network node.
Description
The application is the applying date is on September 28th, 2008, and application number is 200810200804.0, and invention and created name is the divisional application of " a kind of method and device realizing load transfer ".
Technical field
The present invention relates to communication technical field, be specifically related to the method for a kind of control load transfer.
Background technology
At present in 3 gpp, each manufacturer active research long-term evolving network (LTE, LongTermEvolved)/System Architecture Evolution network (SAE, SystemArchitectureEvolved), the object of LTE is to provide a kind of network that can reduce time delay, improve user data rate, the power system capacity of improvement and the low cost of covering, use PS territory business, bearer network is all IP carrying.The fixed LTE/SAE network architecture as shown.
In the packet-based core networks of evolution, Mobility Management Entity (MME, MobilityManagementEntity) function preserves the MM Context of UE, as the mark of user, mobility management states, positional information etc., and Non-Access Stratum (NAS, NonAccessStratum) signaling is processed, be responsible for the safety etc. of NAS signaling.
SAE gateway (SAEGW) comprises gateway (S-GW, ServingGateway) and grouped data network gateway (P-GW, PDNGateway) two parts.S-GW and P-GW is two logic entities, may reside on same or different physical entities.
Gateway S-GW preserves the user face context of UE, as IP address and the routing iinformation of UE, perform Lawful Interception, packet routing function etc.Interface between S-GW and MME is S11, is responsible for communicating between MME, S-GW, and the mobility management information carrying out UE and session control information etc. are alternately.
MME is connected by S1-U and E-UTRAN network by S1-MME, S-GW, is responsible for the function in chain of command and user face respectively.Simultaneously MME is by S3 interface, and S-GW is connected with 2G/3GSGSN respectively by S4 interface, respectively the mobility chain of command anchor point of responsible UE between 3G and SAE network and user face anchor point function.
P-GW is responsible for the user face anchor point function that UE is linked into Packet Data Network, communicated with external packet data net by SGi reference point, there is the function of Packet routing and forwarding, and be responsible for policy, billing and strengthen function, packet filtering function etc. based on each user.P-GW is connected with S-GW by S5 interface, transmits carrying foundation/amendment/deletion and waits control information, and packet routing etc.
Policy charging rule function (PCRF, PolicyandChargingRulesFunction) entity passes through S7 interface to P-GW---as policy and charging enforcement function PCEF(PolicyandChargingEnforcementFunction)---transmit QoS and charging policy control information etc.
Inventor finds in prior art, when overload MME, after MME receives downlink signaling, can not trigger and send out beep-page message with the quantity of control UE response beep-page message to UE, thus reduce the heavy burdens, but, even if the MME of overload does not trigger beep-page message, also need to receive the downlink signaling message that S-GW sends, if there is a large amount of signalings to be sent to MME in the short time, still can causes larger impact to MME and can not reach and subtract underloaded object.In addition, the load transfer processing of prior art to service node is confined to MME, and the load transfer for user face nodes S-GW does not relate to.To sum up, inventor finds, load transfer scheme of the prior art effectively can not alleviate the load of network node.
Summary of the invention
In view of this, the invention provides method and the device of a kind of control load transfer, effectively can alleviate the load of network node.
The method of a kind of control load transfer that the embodiment of the present invention provides, comprising:
Obtain the information of chain of command node overload;
To the signaling buffer memory of chain of command node be sent to, or descend signaling to chain of command node selectively according to business information.
In the technical scheme of the control load transfer that the embodiment of the present invention provides, first obtain the information of chain of command node overload, then will send to the signaling buffer memory of described chain of command node, or descend signaling to chain of command node selectively according to business information.The method of the control load transfer provided by the embodiment of the present invention, can when network node overload, the signaling that selectable processing priority is not high, or buffer memory should be handed down to the signaling of network node, again successively by the transmitting signaling downwards of buffer memory after network node load restoration is normal, effectively alleviate the load of network node.
When judging to need to shift the load of gateway S-GW, select a new S-GW to UE to be transferred and the correspondence carrying being established to new S-GW to complete transfer.Load code reassignment like this by carrying out user face nodes S-GW, gateway S-GW realizes load transfer, avoids gateway to transship, be convenient to attended operation and management.
Accompanying drawing explanation
The load transfer flow schematic diagram of Fig. 1 for providing in the embodiment of the present invention one;
The load transfer flow schematic diagram of Fig. 2 for providing in the embodiment of the present invention two;
The load transfer flow schematic diagram of Fig. 3 for providing in the embodiment of the present invention three;
The load transfer flow schematic diagram of Fig. 4 for providing in the embodiment of the present invention four;
The device realizing load transfer that Fig. 5 provides for the embodiment of the present invention forms schematic diagram;
Fig. 6 is LTE/SAE SNA schematic diagram of the prior art;
The method flow diagram of Fig. 7 control load transfer disclosed in the embodiment of the present invention.
Embodiment
Effectively can not alleviate the problem of the load of network node for load transfer scheme of the prior art, for fundamentally alleviating the load of MME, various embodiments of the present invention provide the load transfer scheme of process network node overload.
Based on the LTE/SAE network architecture, specific embodiments of the invention are described below.
Embodiment one
The load transfer scheme of the gateway S-GW that the present embodiment provides carries out load transfer when user terminal UE carries out tracing section updating (TAU, TrackingAreaUpdate), and with reference to Fig. 1, its flow process comprises the steps:
101, UE sends tracing section updating TAU request message to Mobility Management Entity MME.
Because Mobility Management Entity MME had known the load state information of gateway S-GW, specifically by following manner before receiving TAU request message:
By explicit message informing MME after S-GW overload; Or by " load-balancing mechanism that S-GW selects ", MME judges that S-GW transships.
In addition, even if S-GW does not transship, for operation maintenance management also can determine to shift the load of S-GW, now S-GW is by explicit message informing MME, such as, and load transfer request message.
102, MME receives the TAU request that UE sends, judge that S-GW has transshipped or S-GW requires to shift the load of certain or some UE, even then MME to the UE of this execution TAU select a new S-GW(do not transshipped periodically TAU also to select a new S-GW, in prior art, periodically TAU can not change S-GW) load transfer is carried out to former S-GW.
103, MME sends and creates bearing request message to new S-GW, and this new S-GW and grouped data network gateway P-GW carries out alternately, upgrades corresponding beared information.
104, MME can perform step 106 after receiving the establishment bearing response message of new S-GW, to the deletion (if the load transfer under S-GW overload situations, can not perform this step) of former S-GW correspondence carrying; If the load transfer that S-GW is triggered by explicit message, MME also can feedback response message confirm that load is shifted to former S-GW, does not now need to perform deleting load-bearing flow process.
105, MME responds TAU to UE and accepts message;
Step 106, deletes the carrying corresponding with between former S-GW.
Step 105 and 106 does not have strict sequential restriction.
Embodiment two
The load transfer scheme of the gateway S-GW that the present embodiment provides carries out load transfer when user terminal UE carries out service request (ServiceRequest), and with reference to Fig. 2, its flow process comprises the steps:
201, UE sends service request ServiceRequest message to MME;
Mobility Management Entity MME had known the load state information of gateway S-GW before receiving business request information, specifically by following manner:
By explicit message informing MME after S-GW overload; Or by " load-balancing mechanism that S-GW selects ", MME judges that S-GW transships.
In addition, even if S-GW does not transship, for operation maintenance management also can determine to shift the load of S-GW, now S-GW is by explicit message informing MME, such as, and load transfer request message.
202, MME receives business request information, judges that S-GW has transshipped or S-GW requires to shift the load of certain or some UE, then MME selects a new S-GW do not transshipped to carry out load transfer to former S-GW to described UE.
203, MME sends and creates bearing request message to the beared information of new S-GW, S-GW renewal correspondence to P-GW.
204, MME carries out the foundation of RAB (RAB, RadioAccessBearer) after receiving the establishment bearing response message of new S-GW, and eNB is MME allocation of downlink beared information;
205, after RAB RAB is successfully established, MME is initiated to the bearer update of S-GW, by the downlink bearing message notice S-GW that eNB in step 204 distributes.
206, (optional) deletes the carrying of former S-GW correspondence.
If the load transfer under S-GW overload situations, this step can not be performed; If the load transfer that S-GW is triggered by explicit signaling, MME also can feedback response message confirm that load is shifted to former S-GW, does not now need to perform deleting load-bearing.
Embodiment three
The load transfer scheme of the gateway S-GW that the present embodiment provides is that user terminal UE carries out load transfer under idle Idle state, and with reference to Fig. 3, its flow process comprises the steps:
301, MME knows the loading condition of S-GW in advance;
By explicit message informing MME after S-GW overload; Or by " load-balancing mechanism that S-GW selects ", MME judges that S-GW transships; When S-GW does not transship, S-GW also can determine to shift load as required, and now S-GW is by explicit message informing MME, such as, and load transfer request message.
302, MME judges that S-GW has transshipped or S-GW requires to shift the load of certain or some UE, then MME selects a new S-GW do not transshipped to shift the load on former S-GW to this UE, now UE is in Idle state, and UE does not need the transfer process participating in load completely;
303, MME sends establishment bearing request message and carries out alternately to new S-GW, S-GW and described P-GW, upgrades corresponding beared information;
After 304, MME receives the establishment bearing response message of new S-GW, by the deletion of former S-GW correspondence carrying.
If the load transfer under S-GW overload situations, this step can not be performed; If the load transfer that S-GW is triggered by explicit signaling, MME also can feedback response message confirm that load is shifted to former S-GW, does not now need to perform deleting load-bearing.
Embodiment four
The load transfer scheme of the gateway S-GW that the present embodiment provides carries out load transfer to the UE be under connection mode, and with reference to Fig. 4, its flow process comprises the steps:
401, when MME judges to need to shift the load of S-GW, if UE is in connection status, at this moment MME can discharge S1 and connects, and discharges in release message at S1 that to carry the instruction of cause specific value be S-GW load transfer or TAU again; The RRC connection that eNB release is corresponding, and in RRC connection release message, indicate UE to initiate TAU;
402, UE initiates TAU flow process, and follow-up flow process is identical to 105 with step 101 in embodiment one, does not repeat them here.
In the above embodiment, MME obtain S-GW load information mode can also create or more new bearer process in, S-GW is by response message notice MME load information.If S-GW overload, MME can select new S-GW to create or more new bearer.
In the response message returned, carry cause value instruction when MME transmission establishment bearing request message is transshipped to S-GW, S-GW to transship, carrying is transferred to new S-GW by the S-GW that after MME receives response message, selection one is new.Above establishment carrying request/response also can be more new bearer request/response.
Embodiment five
With reference to figure, the embodiment of the present invention also provides a kind of device 500 realizing load transfer, comprising:
First receiving element 510, for receiving load information or the load transfer request of first service gateway;
Overload judging unit 520, for judging according to load information whether described first service gateway transships;
Load dispatching unit 530, for the load of dispatch service gateway;
Load creating unit 540, for creating the carrying between gateway;
When described overload judging unit 520 judges that first service gateway transships; Or described first receiving element 510 receives the load transfer request of first service gateway; User equipment (UE) is transferred to the second service gateway do not transshipped by described load dispatching unit 530, and described load creating unit 540 creates the carrying between described second service gateway.
Bearer update unit 550, for upgrading the beared information of gateway;
After described load creating unit 540 creates the carrying between described second service gateway, described bearer update unit 550 upgrades the described second service gateway beared information corresponding with between grouped data network gateway.
Further, when user equipment (UE) is assigned to the second service gateway S-GW II do not transshipped be receive user equipment (UE) send tracing section updating TAU ask after carry out time, this device also comprises:
Second receiving element 560, for receiving the request message from user equipment (UE), this request message comprises one of the following: tracing section updating TAU asks, service request;
First transmitting element 570, for sending response message to this user equipment (UE);
Described second receiving element 560 receives the request message of user equipment (UE), and after creating the carrying between this second service gateway S-GW II, the first transmitting element 570 sends corresponding response message to this user equipment (UE).
This device also comprises:
Connection control unit 580, for controlling the connection between base station;
Second transmitting element 590, for sending message to this base station;
When UE is in connection status, the first receiving element 510 receives overload messages or the load transfer request of first service gateway S-GW I, and control unit 580 indicates the connection between release and base station and indicates described user equipment (UE) to carry out tracing section updating TAU; And the cause information carrying S-GW load transfer is sent in the release connection message of base station at the second transmitting element 590;
Connection control unit 580 indicates base station to discharge corresponding RRC connection, and in RRC connection release message, carry the command information being used to indicate UE initiating updating of tracking area TAU.
Embodiment six
The method flow diagram of Fig. 7 control load transfer disclosed in the embodiment of the present invention, shown in Figure 7, in the method for a kind of control load transfer that the present embodiment provides, when overload MME, restriction transmission data or signaling are to described MME, and concrete handling process is as follows:
Step S601, obtains the information of overload MME;
After overload MME, notice S-GW.
MME notifies that the mode of S-GW overload can be by new message, such as load Indication message notice S-GW; After MME load is normal, also notify S-GW by explicit message, such as, load restoration message; Also can be confirm to carry cause specific value or parameter notifications S-GW in DownlinkDataNotificationACK message in downlink data notification.Accordingly, when after MME load is normal by DownlinkDataNotificationACK message in carry cause specific value or parameter notifications S-GW.
Step S602, will send to downlink data or the signaling buffer memory of MME, or descend signaling to MME selectively according to business information;
The downlink data or signaling that send to MME are limited;
S-GW, after obtaining the information of overload MME, when having downlink data or signaling to arrive S-GW, temporarily do not send described downlink data or signaling to MME, or S-GW sends downlink signaling to MME selectively according to business information, to alleviate the load of MME.
After P-GW has downlink data or signaling arrives S-GW, if S-GW has obtained the information of overload MME, then S-GW can issue downlink data or the signaling buffer memory of MME, or selectively alleviate the load of MME to signaling under MME according to business information, such as, only allow the transmitting signaling downwards of urgent call to MME.
All for MME above in all embodiments, but applicable equally to the SGSN in universal mobile telecommunications system UMTS network, do not repeat them here.
In the present embodiment, first the method for control load transfer obtains the information of chain of command node overload, then will send to the signaling buffer memory of described chain of command node, or descends signaling to chain of command node selectively according to business information.The method of the control load transfer provided by the embodiment of the present invention, can when network node overload, the signaling that selectable processing priority is not high, or buffer memory should be handed down to the signaling of network node, again successively by the transmitting signaling downwards of buffer memory after network node load restoration is normal, effectively alleviate the load of network node.
In sum, in the technical scheme of load that what the embodiment of the present invention provided realize transfer, when judging to need to shift the load of S-GW, select a new S-GW to UE to be transferred and the correspondence carrying being established to new S-GW to complete transfer.Load code reassignment like this by carrying out user face nodes S-GW, realizing load transfer on gateway S-GW, avoiding gateway to transship, being convenient to attended operation and management.
It will be appreciated by those skilled in the art that all or part of step realized in above-described embodiment method is that the hardware that can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium mentioned can be read-only memory, disk or CD etc.
It will be understood by those skilled in the art that each functional unit in each embodiment of the present invention can be integrated in a processing module, also can be that the independent physics of unit exists, also can be integrated in a module by two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, and the form of software function module also can be adopted to realize.If described integrated module using the form of software function module realize and as independently production marketing or use time, also can be stored in a computer read/write memory medium.The above-mentioned storage medium mentioned can be read-only memory, disk or CD etc.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.All any amendments done within the spirit and principles in the present invention, equivalent replacement, improvement etc., be all included in protection scope of the present invention.
Claims (2)
1. a method for control load, is characterized in that, comprising:
Gateway SGW obtains the information of chain of command node overload; Wherein, the information of described acquisition chain of command node overload is obtained by following manner:
Obtain the particular message of carrying the overload messages of described chain of command node; Or
Obtain the downlink data notification acknowledge message of carrying cause information or parameter;
Described SGW descends signaling to chain of command node according to business information selectively;
Wherein, described chain of command node is mobile management entity MME or Serving GPRS Support Node SGSN.
2. a device for control load, is characterized in that, comprising:
For the module making gateway SGW obtain the information of chain of command node overload;
Descend signaling to the module of chain of command node for making described SGW selectively according to business information;
Wherein, the module of the described information for obtaining chain of command node overload comprises:
For obtaining the module of the particular message of the overload messages carrying described chain of command node; Or
For obtaining the module of the downlink data notification acknowledge message of carrying cause information or parameter;
Wherein, described chain of command node is mobile management entity MME or Serving GPRS Support Node SGSN.
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| CN 200810200804 CN101686498B (en) | 2008-09-28 | 2008-09-28 | Method and device for realizing load transfer |
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| US8848516B2 (en) * | 2010-09-15 | 2014-09-30 | Telefonaktiebolaget L M Ericsson (Publ) | Methods and apparatus for relocating and restoring connections through a failed serving gateway and traffic offloading |
| CN102811462A (en) * | 2011-05-31 | 2012-12-05 | 普天信息技术研究院有限公司 | Overload processing method and system for mobility management entity |
| CN103139023A (en) * | 2011-11-25 | 2013-06-05 | 华为技术有限公司 | User access control method, network equipment and system |
| CN104869660A (en) * | 2014-02-21 | 2015-08-26 | 中兴通讯股份有限公司 | Method, controller and gateway capable of ensuring continuity of business data |
| DK3417556T3 (en) * | 2016-02-18 | 2022-10-03 | Ericsson Telefon Ab L M | Systems, methods and devices for controlling data rate for control plane optimization |
| CN112492574B (en) | 2016-06-28 | 2022-12-06 | 华为技术有限公司 | Load migration method, device and system |
| JP7026622B2 (en) * | 2016-08-15 | 2022-02-28 | 株式会社Ｎｔｔドコモ | Communication system, processing server and bearer establishment control method |
| EP3313114B1 (en) * | 2016-10-18 | 2021-06-09 | Nokia Solutions and Networks Oy | Detection and mitigation of signalling anomalies in wireless network |
| CN106452966A (en) * | 2016-11-02 | 2017-02-22 | 河南智业科技发展有限公司 | Multi-gateway management realization method for OpenStack cloud desktop |
| CN108924879B (en) * | 2018-06-22 | 2021-07-30 | 北京格瑞空间科技有限公司 | Load balancing method for wireless Internet of things |
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| CN102791000A (en) | 2012-11-21 |
| CN101686498B (en) | 2013-02-27 |
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