WO2014179928A1 - 运营商共享网络的流量控制方法及装置 - Google Patents

运营商共享网络的流量控制方法及装置 Download PDF

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Publication number
WO2014179928A1
WO2014179928A1 PCT/CN2013/075214 CN2013075214W WO2014179928A1 WO 2014179928 A1 WO2014179928 A1 WO 2014179928A1 CN 2013075214 W CN2013075214 W CN 2013075214W WO 2014179928 A1 WO2014179928 A1 WO 2014179928A1
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Prior art keywords
session
serving gateway
plmn
information
under
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PCT/CN2013/075214
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English (en)
French (fr)
Inventor
汤斌淞
张宏卓
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201380001943.XA priority Critical patent/CN104303473B/zh
Priority to PCT/CN2013/075214 priority patent/WO2014179928A1/zh
Publication of WO2014179928A1 publication Critical patent/WO2014179928A1/zh

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Classifications

    • 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
    • H04W28/10—Flow control between communication endpoints

Definitions

  • the present invention relates to the field of communications, and more particularly to a flow control method and apparatus for an operator shared network. Background technique
  • the radio access network constructed by the operator X is leased to the core network operators A, B and C by a lease method, and each core network operator rents a certain capacity share of the shared network. For example, A and B each rent 30%, and C rents the remaining 40%.
  • the UE can be switched to load balancing by the base station X2 to control the air interface resource share of an operator on the base station of an area.
  • SGW service gateway
  • the embodiments of the present invention provide a traffic control method and device for an operator shared network, which can implement load balancing of resources according to an operator share in the SGW.
  • a traffic control method for an operator shared network includes: acquiring current load information and a load threshold of a public land mobile network PLMN to which a user equipment session belongs to a serving gateway; The traffic information, the current load information of the PLMN under the serving gateway, and the load threshold of the PLMN under the serving gateway control load balancing of the PLMN under the serving gateway.
  • the specific implementation is: the load threshold of the PLMN in the serving gateway is a predetermined threshold or a threshold adjusted according to an operation policy.
  • the current load information of the public land mobile network PLMN to which the session of the user equipment belongs is located in the serving gateway is specifically implemented as
  • the service gateway receives the establishment request of the session sent by the MME, and the establishment request of the session carries the identification information of the PLMN, and the service gateway acquires the current load information of the PLMN according to the identification information of the PLMN.
  • the load balancing of the PLMN under the serving gateway is controlled according to the service traffic information of the session, the current load information of the PLMN under the serving gateway, and the load threshold of the PLMN under the serving gateway.
  • the service gateway is configured according to the service of the session.
  • the traffic information, the current load information of the PLMN under the serving gateway, and the load threshold of the PLMN under the serving gateway determine whether to allow the bearer of the session to be established under the serving gateway.
  • the serving gateway according to the service traffic information of the session, the current load information of the PLMN under the serving gateway, and the PLMN under the serving gateway
  • the load threshold determines whether the bearer that allows the session to be established under the serving gateway is specifically implemented as follows: if the traffic of the session and the current load of the PLMN under the serving gateway are less than the load threshold of the PLMN under the serving gateway, the service is implemented.
  • the gateway sends a setup confirmation message of the session to the MME, so that the MME establishes a bearer of the session; or if the traffic of the session and the current load of the PLMN under the serving gateway are greater than a load threshold of the PLMN under the serving gateway,
  • the serving gateway sends a setup reject message for the session to the MME for the MME to reselect the serving gateway to send a setup request for the session.
  • the method further includes: if If the PLMN exceeds the traffic of the serving gateway, the serving gateway sends the indication information of the PLMN traffic overrun to the MME, so that the MME switches at least one session of the PLMN connected to the serving gateway to the service gateway. Service gateway.
  • the current load information of the public land mobile network PLMN to which the session of the user equipment belongs is located in the serving gateway is specifically implemented as The MME receives the current load information of the PLMN sent by the at least one serving gateway; or the MME receives the load information sent by the server according to the load query request of the MME, where the load information includes the current status of the PLMN recorded under the at least one serving gateway of the server. Load information.
  • the service traffic information of the session, the current load information of the PLMN under the serving gateway, and the load of the PLMN under the serving gateway Threshold control The load balancing of the PLMN under the serving gateway is implemented as follows: the MME is configured according to the service traffic information of the session, the current load information of the PLMN under the serving gateway, and the load threshold of the PLMN under the serving gateway from the at least one service. Selecting a service gateway in the gateway that meets the traffic demand of the session, and the service flow conforming to the session The demanding service gateway sends a setup request for the session to establish a bearer for the session.
  • a service gateway including: a receiving unit, configured to receive session establishment request information sent by a mobility management entity MME, where the session establishment request information includes identifier information of a public land mobile network PLMN to which the session belongs The service flow information of the session, the determining unit, configured to determine, according to the load threshold of the PLMN, the current load information of the PLMN, and the service traffic information of the session, the feedback information of the session establishment request, where the feedback information includes the establishment of the session The confirmation information or the establishment rejection information of the session; the sending unit, configured to send the feedback information to the MME.
  • the specific implementation is: if the service traffic of the session and the current load of the PLMN under the serving gateway are smaller than the load threshold of the PLMN under the serving gateway, the determining unit Determining a setup confirmation message for the session to indicate that the MME establishes a bearer for the session; or determining if the traffic of the session and the current load of the PLMN under the serving gateway are greater than a load threshold of the PLMN under the serving gateway.
  • the unit is configured to determine a setup reject message for the session to instruct the MME to reselect the serving gateway to send a setup request for the session.
  • the specific implementation is: if the PLMN is out of traffic of the serving gateway, the sending unit is further used to: The indication information of the PLMN traffic overrun is sent to the MME, so that the MME switches at least one session of the PLMN connected to the serving gateway to a serving gateway other than the serving gateway.
  • a mobility management entity device including: a receiving unit, configured to receive current load information and a load threshold of a public land mobile network PLMN under at least one serving gateway; and a selecting unit, configured to use the PLMN according to the session The current load information, the load threshold, and the service traffic information of the session in the at least one serving gateway, selecting, from the at least one serving gateway, a serving gateway that meets the traffic demand requirement of the session; and sending, for the The service gateway of the session's service traffic needs to send a setup request for the session.
  • the specific implementation is: The current load information and the load threshold of the PLMN under the at least one serving gateway are actively sent by the at least one serving gateway.
  • the sending unit is further configured to: send, by the sending unit, a first load query request to the at least one serving gateway, so that the receiving unit receives Current load information and load threshold of the PLMN under the at least one month of the service gateway.
  • the sending unit is further configured to send a second load query request to the server, so that the receiving unit receives current load information of the PLMN under the at least one serving gateway.
  • a load threshold wherein the server records current load information and load thresholds of each PLMN under the at least one serving gateway.
  • FIG. 1 is a flowchart of a flow control method for an operator shared network according to an embodiment of the present invention.
  • FIG. 2 is a flow chart of interaction of a traffic control method for an operator shared network according to an embodiment of the present invention.
  • FIG. 3 is another interaction flow diagram of a flow control method for an operator shared network according to an embodiment of the present invention.
  • FIG. 4 is another interaction flow diagram of a flow control method for an operator shared network according to an embodiment of the present invention.
  • FIG. 5 is another interaction flow diagram of a flow control method for an operator shared network according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a service gateway according to an embodiment of the present invention.
  • FIG. 7 is another schematic structural diagram of a mobility management entity device according to an embodiment of the present invention.
  • FIG. 8 is another schematic structural diagram of a service gateway according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a mobility management entity device according to an embodiment of the present invention. detailed description
  • GSM Global System of Mobile Communication
  • CDMA Code Division Multiple Access
  • WCDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • the base station may be a base station (BTS, Base Transceiver Station) in GSM or CDMA, or may be a base station (NodeB) in WCDMA, or may be an evolved base station (eNB or e-NodeB, evolutional Node B) in LTE.
  • BTS Base Transceiver Station
  • NodeB base station
  • eNB evolved base station
  • e-NodeB evolutional Node B
  • FIG. 1 is a flowchart of a flow control method for an operator shared network according to an embodiment of the present invention. The method of FIG. 1 is performed by a Mobility Management Entity (MME).
  • MME Mobility Management Entity
  • PLMN Packe Mobility Network
  • PLMN a carrier's cellular mobile communication network
  • PLMN is a network established and operated by the government or its approved operators to provide the public with the purpose of land mobile communications services.
  • the network can be interconnected with other communication networks such as the Public Swithed Telephone Network (PSTN) to form a regional or national-scale communication network.
  • PSTN Public Swithed Telephone Network
  • the PLMN can be considered as an operator.
  • the load threshold of the PLMN refers to the threshold of the traffic that the PLMN is allowed to use in the serving gateway.
  • the load balancing of the PLMN under the serving gateway is controlled according to the service traffic of the session, the current load of the PLMN under the serving gateway, and the load threshold of the PLMN under the serving gateway, thereby avoiding resources of the operator under the serving gateway. overload.
  • the load threshold of the PLMN at the serving gateway is a predetermined threshold or a threshold adjusted according to an operation policy.
  • the operation strategy can be a control strategy of the bandwidth share, or an adjustment strategy based on the temporary needs of each operator. Of course, other circumstances that may cause the share to change are not excluded.
  • Transport Business A is the network bandwidth share configured by operators C and D. It can be that all service gateways share the same share ratio, and different service gateways can be assigned different share proportions.
  • operators B, C, and D are Service gateways 1, 2 and 3 are 40%, 30%, 30%, or operators C and D are 40%, 30%, 30% at service gateway 1, and 30%, 35%, 35 at service gateway 2 %, at service gateway 3 is 20%, 30%, 50%.
  • the operator A can flexibly adjust the share of each operator in the service gateway according to the control strategy of the bandwidth share.
  • acquiring the current load information of the public land mobile network PLMN to which the session of the user equipment belongs to the serving gateway may include: the serving gateway receiving the establishment request of the session sent by the MME, the establishment request of the session Carrying the identification information of the PLMN, the serving gateway acquires the current load information of the PLMN according to the identification information of the PLMN.
  • the identification information of the PLMN to which the session belongs may be information for distinguishing different PLMNs, for example, a PLMN name, an ID number of the PLMN, a number, and the like, and the present invention is not limited thereto.
  • the session establishment request may further carry service flow information of the session.
  • controlling the load balancing of the PLMN under the serving gateway according to the service traffic information of the session, the current load information of the PLMN under the serving gateway, and the load threshold of the PLMN under the serving gateway may include: the service network according to the session The service traffic information, the current load information of the PLMN under the serving gateway, and the load threshold of the PLMN under the serving gateway determine whether to allow the bearer of the session to be established under the serving gateway.
  • determining, by the serving gateway, whether to allow the bearer to establish the session under the serving gateway according to the service traffic information of the session, the current load information of the PLMN under the serving gateway, and the load threshold of the PLMN under the serving gateway may include: If the service traffic of the session and the current load of the PLMN under the serving gateway are smaller than the load threshold of the PLMN under the serving gateway, the serving gateway sends a setup confirmation message of the session to the MME, so that the MME establishes 7 sessions of the session; Or, if the traffic of the session and the current load of the PLMN under the serving gateway are greater than the load threshold of the PLMN under the serving gateway, the serving gateway sends a setup reject message of the session to the MME, so that the MME reselects the serving gateway. To send a setup request for the session.
  • the method may further include: if the traffic of the PLMN at the serving gateway is exceeded, the serving gateway sends an indication that the PLMN traffic exceeds the limit, so that the MME is connected to At least one session of the PLMN of the serving gateway switches to another serving gateway other than the serving gateway. Further, the MME may switch the at least one session to the outside of the serving gateway by using a location area update process or a handover procedure of the user equipment to which the session belongs. It serves the gateway to implement the service redirection of the user equipment to which the session belongs.
  • acquiring the current load information of the public land mobile network PLMN to which the user equipment session belongs to the serving gateway may include: receiving, by the MME, current load information of the PLMN sent by the at least one serving gateway; or The MME receives load information sent by the server according to the load query request of the MME, and the load information includes current load information of the PLMN recorded under the at least one serving gateway of the server.
  • controlling the load balancing of the PLMN under the serving gateway according to the service traffic information of the session, the current load information of the PLMN under the serving gateway, and the load threshold of the PLMN under the serving gateway may include: the MME according to the session
  • the service traffic information, the current load information of the PLMN under the serving gateway, and the load threshold of the PLMN under the serving gateway select a serving gateway that meets the load threshold requirement of the PLMN from the at least one serving gateway, and send the session to Create a request.
  • FIG. 2 is a flow chart of interaction of a traffic control method for an operator shared network according to an embodiment of the present invention.
  • the UE sends an attach request to the MME by using the eNB.
  • the MME sends a security authentication request to the home subscriber server (HSS) according to the UE attach request.
  • HSS home subscriber server
  • the HSS sends a security authentication feedback message according to the security authentication request.
  • the MME passes the security authentication of the UE.
  • the UE initiates a location area update process.
  • the MME sends a session establishment request to a serving gateway (SGW) according to the user's attach request.
  • SGW serving gateway
  • the session establishment request carries the identifier information of the operator to which the session belongs and the service flow information of the session.
  • the identification information of the operator may be the name of the operator, the code, or other information that can identify the operator to which the session belongs. The present invention is not limited herein.
  • the SGW obtains a load threshold and current load information of the operator to which the session belongs according to the session establishment request, and determines whether to allow session establishment according to the service flow information of the current session.
  • the relationship between the service traffic of the session and the current load of the operator and the load threshold of the operator can be determined to determine whether establishing the current session may cause the service traffic of the operator to exceed the limit. If built If the current session does not cause the service traffic of the operator to exceed the load threshold, the establishment of the bearer corresponding to the session is accepted, and a session establishment confirmation message is sent to the MME.
  • the UE initiates an RRC establishment reconfiguration process.
  • Step 208 and step 209 are also related to the prior art, and the present invention will not be described in detail herein.
  • the MME sends the service information of the user to the service gateway and the service traffic information of the session, so that the service gateway can determine whether to establish a user session according to the load condition of the operator, thereby realizing the share of the operator in the service gateway. Load balancing.
  • FIG. 3 is another interaction flow diagram of a flow control method for an operator shared network according to an embodiment of the present invention.
  • the steps 301-306 are similar to the steps 201-206 of FIG. 2, and the embodiments of the present invention are not described in detail herein.
  • the SGW1 obtains a load threshold and current load information of the operator to which the session belongs according to the session establishment request, and determines whether the session establishment is allowed according to the service flow information of the current session.
  • the relationship between the service traffic of the session and the current load of the operator and the load threshold of the operator can be determined to determine whether the establishment of the current session may cause the service traffic of the operator to exceed the limit. If the establishment of the session causes the service traffic of the operator to exceed the load threshold, the establishment of the bearer corresponding to the current session is rejected, and a session establishment rejection message is sent to the MME.
  • the MME After receiving the session establishment reject message, the MME sends a session establishment request to the SGW2.
  • the SGW2 is a serving gateway different from the SGW1, and the MME sends the session establishment request to the SGW2, which is similar to the step of sending the session establishment request to the serving gateway for the first time, and the details are not described in detail herein.
  • the MME may reselect the serving gateway to establish a session request.
  • FIG. 4 is another interaction flow diagram of a flow control method for an operator shared network according to an embodiment of the present invention.
  • the UE sends an attach request to the MME by using the eNB.
  • the serving gateway sends, to the MME, current load information and a load threshold of each PLMN under the serving gateway.
  • the serving gateway sends the load related information such as the current load information and the load threshold of each PLMN in the serving gateway to the MME.
  • the load threshold does not change, the load threshold only needs to be It is sent when the load related information is sent for the first time, and the current load information needs to be sent every time the load related information is sent.
  • the serving gateway may actively send load related information to the MME, for example, periodically send load related information to the MME.
  • the serving gateway may send the load related information to the MME according to the load query request sent by the MME.
  • step 401 and step 402 have no temporal relationship. However, if the serving gateway sends load related information to the MME according to the load query request sent by the MME, step 402 is after step 401.
  • the MME selects the SGW1 according to the current load information of the PLMN to which the session belongs, the load threshold, and the service traffic information of the session.
  • the unshared bandwidth share of the PLMN to which the session belongs in the SGW1 meets the service traffic requirement of the session.
  • the MME selects a serving gateway that meets the service traffic requirements of the session according to the received load related information.
  • the unallocated bandwidth share (load threshold - current load) of the PLMN in the serving gateway is greater than or equal to the traffic of the session.
  • SGW1 is a service gateway that meets the traffic requirements of the session.
  • the MME sends a session establishment request to the SGW1.
  • SGW1 sends a setup confirmation message to the MME.
  • Step 404 and step 405 are the content of the prior art, and the embodiments of the present invention are not described in detail herein.
  • FIG. 5 is another interaction flow diagram of a flow control method for an operator shared network according to an embodiment of the present invention.
  • the UE sends an attach request to the MME by using the eNB.
  • the service gateway sends a current load information and a load threshold of each PLMN under the serving gateway to a dynamic host configuration protocol (DHCP) server.
  • DHCP dynamic host configuration protocol
  • the load-related information of the at least one serving gateway is recorded on the DCHP server, where the load-related information includes current load information and a load threshold of each PLMN under the serving gateway.
  • DHCP server in the embodiment of the present invention, which is used to record the current load information and the load threshold of each PLMN under each service gateway, which is not limited herein.
  • step 501 and step 502 do not have a temporal relationship.
  • the MME sends a load query request to the DHCP server.
  • the MME initiates a load query request to the DHCP server according to the attach request of the UE, so as to obtain the current load information and the load threshold of the PLMN under each service gateway.
  • the DHCP server sends, to the MME, current load information and a load threshold of the PLMN to which the session under the at least one serving gateway belongs.
  • the DHCP server may choose to send load related information of all service gateways, or may only select load related information of the qualified service gateways.
  • the load-related information of the serving gateway may include only the current load information and the load threshold of the PLMN to which the session belongs, and may also include the current load information and load threshold of each PLMN under the serving gateway.
  • the MME selects the SGW1 according to the current load information of the PLMN to which the session belongs, the load threshold, and the service traffic information of the session.
  • the unshared bandwidth share of the PLMN to which the session belongs in the SGW1 meets the service traffic requirement of the session.
  • the MME selects a serving gateway that meets the service traffic requirements of the session according to the received load related information.
  • the unallocated bandwidth share (load threshold - current load) of the PLMN in the serving gateway is greater than or equal to the traffic of the session.
  • SGW1 is a service gateway that meets the traffic requirements of the session.
  • the MME sends a session establishment request to the SGW1.
  • the SGW1 sends a setup confirmation message to the MME.
  • Step 506 and step 507 are related to the prior art, and the embodiments of the present invention are not described in detail herein.
  • FIG. 6 is a schematic structural diagram of a service gateway 600 according to an embodiment of the present invention.
  • the serving gateway 600 may include: a receiving unit 601, a determining unit 602, and a transmitting unit 603.
  • the receiving unit 601 can receive the session establishment request information sent by the mobility management entity MME, where the session establishment request information includes the identity information of the public land mobile network PLMN to which the session belongs and the service flow information of the session.
  • the determining unit 602 may determine, according to the load threshold of the PLMN, the current load information of the PLMN, and the service traffic information of the session, the feedback information of the session establishment request, where the feedback information includes the establishment confirmation information of the session or the session. Establish a rejection message.
  • the sending unit 603 can send the feedback information to the MME.
  • the serving gateway 600 obtains the service flow information of the PLMN (operator) and the session to which the current session belongs according to the session establishment request of the MME, and determines whether to allow the establishment of the session according to the load condition of the current PLMN. Control the negative of the PLMN under the service gateway Load balancing, avoiding resource overload of PLMN under the service gateway.
  • the load threshold of the PLMN is a predetermined threshold or a threshold adjusted according to an operation policy.
  • the determining unit 602 may determine a setup confirmation message of the session to indicate The MME establishes a bearer for the session.
  • the determining unit 602 may determine a setup reject message of the session. Instructing the MME to reselect the serving gateway to send a setup request for the session.
  • the sending unit 603 may further send, to the MME, indication information that the PLMN traffic is out of limits, so that the MME will connect to the serving gateway. At least one session of the PLMN switches to a serving gateway outside the serving gateway.
  • the service gateway 600 can also implement the SGW in the embodiment shown in FIG. 2 or the embodiment shown in FIG.
  • FIG. 7 is a schematic structural diagram of a mobility management entity 700 according to an embodiment of the present invention.
  • the mobility management entity device 700 may include: a receiving unit 701, a selecting unit 702, and a transmitting unit 703.
  • the receiving unit 701 can receive current load information and a load threshold of the public land mobile network PLMN under the at least one serving gateway.
  • the selecting unit 702 may select, from the at least one serving gateway, a serving gateway that meets the service traffic requirement of the session according to the current load information, the load threshold, and the service traffic information of the session of the PLMN to which the session belongs.
  • the sending unit 703 may send the establishment request of the session to the serving gateway that meets the service traffic demand of the session.
  • the mobility management entity 700 obtains the current load information and the load threshold of the PLMNs of the session to which the session belongs, and selects the service gateway that meets the service traffic demand of the session to send the session establishment request, thereby Controlling the load balancing of the PLMN under the serving gateway avoids the resource overload of the PLMN under the serving gateway.
  • the current load information and the load threshold of the PLMN under the at least one serving gateway are actively sent by the at least one serving gateway.
  • the sending unit 703 may further send a first load query request to the at least one serving gateway, so that the receiving unit 701 receives current load information and a load threshold of the PLMN under the at least one serving gateway.
  • the sending unit 703 may further send a second load query request to the server, so that the receiving unit 701 receives current load information and a load threshold of the PLMN under the at least one serving gateway, where the server records at least Current load information and load threshold of each PLMN under a serving gateway.
  • the embodiment of the mobility management entity 700 may also implement the functions of the MME in the embodiment shown in FIG. 4 or FIG. 5, and details are not described herein.
  • FIG. 8 is a schematic structural diagram of a service gateway 800 according to an embodiment of the present invention.
  • Serving gateway 800 can include: transmit circuitry 801, processor 802 and memory 803 and receive circuitry 804.
  • the receiving circuit 804 can receive the session establishment request information sent by the mobility management entity MME, where the session establishment request information includes the identity information of the public land mobile network PLMN to which the session belongs and the service flow information of the session.
  • the processor 802 according to the load threshold of the PLMN, the current load information of the PLMN, and the service traffic information of the session, determining feedback information about the session establishment request, where the feedback information includes establishment confirmation information of the session or establishment of the session. Reject information.
  • the memory 803 can store an instruction that causes the processor 802 to determine feedback information for the session establishment request according to the load threshold of the PLMN, the current load information of the PLMN, and the traffic flow information of the session.
  • the transmitting circuit 801 can send the feedback information to the MME.
  • the service gateway 800 obtains the service flow information of the PLMN (operator) and the session to which the current session belongs according to the session establishment request of the MME, and determines whether to allow the establishment of the session according to the load condition of the current PLMN. Controlling the load balancing of the PLMN under the serving gateway avoids the resource overload of the PLMN under the serving gateway.
  • the processor 802 controls the operation of the service gateway 800, which may also be referred to as a CPU (Central Processing Unit).
  • Memory 803 can include read only memory and random access memory and provides instructions and data to processor 802. A portion of the memory 803 may also include non-volatile random access memory (NVRAM).
  • transmit circuitry 801 and receive circuitry 804 can be coupled to antenna 805.
  • the various components of the service gateway 800 are coupled together by a bus system 806, which may include, in addition to the data bus. Including the power bus, control bus and status signal bus. However, for clarity of description, various buses are labeled as bus system 806 in the figure.
  • Processor 802 may be an integrated circuit chip with signal processing capabilities. In the implementation process, the steps of the above method may be completed by an integrated logic circuit of hardware in the processor 802 or an instruction in the form of software.
  • the processor 802 described above may be a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware. Component.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA off-the-shelf programmable gate array
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present invention may be implemented or carried out.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by the hardware decoding processor, or by a combination of hardware and software modules in the decoding processor.
  • the software modules can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory 803, and the processor 802 reads the information in the memory 803 and combines the hardware to perform the steps of the above method.
  • the load threshold of the PLMN is a predetermined threshold or a threshold adjusted according to an operation policy.
  • the processor 802 may determine a setup confirmation message of the session to indicate The MME establishes a bearer for the session.
  • the processor 802 may determine a setup reject message of the session. Instructing the MME to reselect the serving gateway to send a setup request for the session.
  • the transmitting circuit 804 may further send the indication information of the PLMN traffic overrun to the MME, so that the MME will connect to the serving gateway. At least one session of the PLMN switches to a serving gateway outside the serving gateway.
  • the service gateway 800 can also implement the functions of the SGW in the embodiment shown in FIG. 2 or the SGW1 and SGW2 in the embodiment shown in FIG. 3, and the details are not described herein again.
  • FIG. 9 is a schematic structural diagram of a mobility management entity device 900 according to an embodiment of the present invention.
  • Mobility tube The physical device 900 can include a transmit circuit 901, a receive circuit 904, a processor 902, and a memory 903.
  • the receiving circuit 904 can receive current load information and a load threshold of the public land mobile network PLMN under the at least one serving gateway.
  • the processor 902 can select, from the at least one serving gateway, a serving gateway that meets the service traffic requirement of the session according to the current bearer information of the PLMN to which the session belongs, the load threshold, and the service traffic information of the session.
  • the memory 903 is configured to enable the processor 902 to select, according to the current load information of the PLMN of the session to the at least one serving gateway, the load threshold, and the traffic flow information of the session, select, from the at least one serving gateway, the service traffic requirement that meets the session.
  • the instructions of the service gateway are configured to enable the processor 902 to select, according to the current load information of the PLMN of the session to the at least one serving gateway, the load threshold, and the traffic flow information of the session, select, from the at least one serving gateway, the service traffic requirement that meets the session.
  • the transmitting circuit 901 can send a request for establishing the session to the serving gateway that meets the traffic demand of the session.
  • the mobility management entity device 900 obtains the current load information and the load threshold of the PLMNs of the session to which the session belongs, and selects the service gateway that meets the service traffic demand of the session to send the session establishment request. Thereby controlling the load balancing of the PLMN under the serving gateway, and avoiding resource overload of the PLMN under the serving gateway.
  • the processor 902 controls the operation of the mobility management entity device 900, which may also be referred to as a CPU (Central Processing Unit).
  • Memory 903 can include read only memory and random access memory and provides instructions and data to processor 902.
  • a portion of memory 903 may also include non-volatile random access memory (NVRAM).
  • transmit circuitry 901 and receive circuitry 904 can be coupled to antenna 905.
  • the various components of the mobility management entity device 900 are coupled together by a bus system 906, which may include, in addition to the data bus, a power bus, a control bus, a status signal bus, and the like. However, for clarity of description, various buses are labeled as bus system 906 in the figure.
  • the method disclosed in the above embodiments of the present invention may be applied to the processor 902 or by the processor.
  • Processor 902 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the foregoing method may be completed by an integrated logic circuit of hardware in the processor 902 or an instruction in a form of software.
  • the processor 902 described above may be a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware. Component.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA off-the-shelf programmable gate array
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present invention may be implemented or executed.
  • General processing The device can be a microprocessor or the processor can be any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware decoding processor, or may be performed by a combination of hardware and software modules in the decoding processor.
  • the software modules can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory 903, and the processor 902 reads the information in the memory 903 and completes the steps of the above method in combination with the hardware thereof.
  • the current load information and the load threshold of the PLMN under the at least one serving gateway are actively sent by the at least one serving gateway.
  • the transmitting circuit 901 may further send a first load query request to the at least one serving gateway, so that the receiving circuit 904 receives current load information and a load threshold of the PLMN under the at least one serving gateway.
  • the transmitting circuit 901 may further send a second load query request to the server, so that the receiving circuit 904 receives current load information and a load threshold of the PLMN under the at least one serving gateway, where the server records at least Current load information and load threshold of each PLMN under a serving gateway.
  • the embodiment of the mobility management entity 900 may also implement the functions of the MME in the embodiment shown in FIG. 4 or FIG. 5, and the details are not described herein again.
  • the size of the sequence numbers of the above processes does not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not be taken to the embodiments of the present invention.
  • the implementation process constitutes any limitation.
  • the disclosed systems, devices, and methods may be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division, and may be implemented in actual implementation.
  • multiple units or components may be combined or integrated into another system, or some features may be omitted or not implemented.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the functions, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium.
  • the technical solution of the present invention which is essential to the prior art or part of the technical solution, may be embodied in the form of a software product stored in a storage medium, including
  • the instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program codes. .

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Abstract

本发明实施例提供一种运营商共享网络的流量控制方法及装置。该方法包括：获取用户设备（UE）的会话所属的公共陆地移动网络（PLMN）在服务网关（SGW）下的当前负载信息和负载门限（101）；根据该会话的业务流量信息、该PLMN在SGW下的当前负载信息和该PLMN在SGW下的负载门限控制该PLMN在SGW下的负载均衡（102）。通过根据会话的业务流量、PLMN在SGW下的当前负载及PLMN在SGW下的负载门限控制PLMN在SGW下的负载均衡，避免了运营商在SGW下的资源过载。

Description

运营商共享网络的流量控制方法及装置 技术领域
本发明涉及通信领域， 更具体地， 涉及运营商共享网络的流量控制方法 及装置。 背景技术
随着移动通信技术的发展， 运营商提出了一种新的网络共享商业模式， 此处称之为增强的网络共享。例如，运营商 X建设的无线接入网通过租用方 式租借给核心网运营商 A, B和 C, 每个核心网运营商租用该共享网络的一 定容量份额。 例如 A, B各租用 30%, C租用剩余的 40%份额。
现有技术中，可以通过基站 X2切换 UE达到负载均衡（ Load balancing ), 以控制一个区域的基站上某个运营商的空口资源份额。 但在某一服务网关 ( Severing Gateway, SGW ) 下， 有可能出现某个运营商的资源过载。 发明内容
本发明实施例提供了一种运营商共享网络的流量控制方法及装置， 能够 在 SGW内实现资源的按运营商份额的负载均衡。
第一方面， 提出了一种运营商共享网络的流量控制方法， 该方法包括： 获取用户设备的会话所属的公共陆地移动网络 PLMN在服务网关下的当前 负载信息和负载门限；根据该会话的业务流量信息、该 PLMN在服务网关下 的当前负载信息和该 PLMN在服务网关下的负载门限控制该 PLMN在服务 网关下的负载均衡。
在第一种可能的实现方式中， 结合第一方面， 具体实现为： 该 PLMN 在该服务网关的负载门限为预定的门限或根据运营策略调整的门限。
在第二种可能的实现方式中，结合第一方面或第一方面的第一种可能的 实现方式，获取用户设备的会话所属的公共陆地移动网络 PLMN在服务网关 下的当前负载信息具体实现为： 该服务网关接收 MME发送的该会话的建立 请求，该会话的建立请求携带该 PLMN的标识信息，服务网关根据该 PLMN 的标识信息获取该 PLMN的当前负载信息
在第三种可能的实现方式中， 结合第一方面的第二种可能的实现方式， 根据该会话的业务流量信息、 该 PLMN在服务网关下的当前负载信息和该 PLMN在服务网关下的负载门限控制该 PLMN在服务网关下的负载均衡具 体实现为： 该服务网关根据该会话的业务流量信息、该 PLMN在服务网关下 的当前负载信息和该 PLMN在服务网关下的负载门限确定是否允许在该服 务网关下建立该会话的承载。
在第四种可能的实现方式中， 结合第一方面的第三种可能的实现方式， 服务网关根据该会话的业务流量信息、该 PLMN在服务网关下的当前负载信 息和该 PLMN在服务网关下的负载门限确定是否允许在该服务网关下建立 该会话的承载具体实现为：如果该会话的业务流量与该 PLMN在服务网关下 的当前负载小于该 PLMN 在服务网关下的负载门限， 则该服务网关向该 MME发送该会话的建立确认消息以便该 MME建立该会话的承载； 或者如 果该会话的业务流量与该 PLMN在服务网关下的当前负载大于该 PLMN在 服务网关下的负载门限， 则该服务网关向该 MME发送该会话的建立拒绝消 息以便该 MME重新选择服务网关以发送该会话的建立请求。
在第五种可能的实现方式中，结合第一方面的第二种可能的实现方式至 第一方面的第四种可能的实现方式中任一种可能的实现方式， 该方法还包 括： 如果该 PLMN在该服务网关的流量超限， 则该服务网关向该 MME发送 该 PLMN 流量超限的指示信息， 以便该 MME将连接到该服务网关的该 PLMN的至少一个会话切换到该服务网关之外的服务网关。
在第六种可能的实现方式中， 结合第一方面或第一方面的第一种可能的 实现方式，获取用户设备的会话所属的公共陆地移动网络 PLMN在服务网关 下的当前负载信息具体实现为： MME接收至少一个服务网关发送的 PLMN 的当前负载信息； 或者该 MME接收服务器根据该 MME的负载查询请求发 送的负载信息， 该负载信息包括记录在该服务器的至少一个服务网关下的 PLMN的当前负载信息。
在第七种可能的实现方式中， 结合第一方面的第六种可能的实现方式， 根据该会话的业务流量信息、 该 PLMN在服务网关下的当前负载信息和该 PLMN在服务网关下的负载门限控制该 PLMN在服务网关下的负载均衡具 体实现为： 该 MME根据该会话的业务流量信息、该 PLMN在服务网关下的 当前负载信息和该 PLMN在服务网关下的负载门限从该至少一个服务网关 中选择符合该会话的业务流量需求的服务网关， 并向该符合该会话的业务流 量需求的服务网关发送该会话的建立请求以建立该会话的承载。 第二方面， 提出了一种服务网关， 包括： 接收单元， 用于接收移动性管 理实体 MME发送的会话建立请求信息， 该会话建立请求信息包括该会话所 属的公共陆地移动网络 PLMN的标识信息和该会话的业务流量信息；确定单 元， 用于根据该 PLMN的负载门限、 该 PLMN的当前负载信息和该会话的 业务流量信息确定对该会话建立请求的反馈信息，该反馈信息包括该会话的 建立确认信息或者该会话的建立拒绝信息； 发送单元， 用于向该 MME发送 该反馈信息。
在第一种可能的实现方式中， 结合第二方面， 具体实现为： 如果该会话 的业务流量与该 PLMN在服务网关下的当前负载小于该 PLMN在服务网关 下的负载门限， 则该确定单元用于确定该会话的建立确认消息以便指示该 MME建立该会话的承载； 或者如果该会话的业务流量与该 PLMN在服务网 关下的当前负载大于该 PLMN在服务网关下的负载门限，则该确定单元用于 确定该会话的建立拒绝消息以便指示该 MME重新选择服务网关以发送该会 话的建立请求。
在第二种可能的实现方式中，结合第二方面或第二方面的第一种可能的 实现方式， 具体实现为： 如果该 PLMN在该服务网关的流量超限， 则该发送 单元还用于向该 MME发送该 PLMN流量超限的指示信息，以便该 MME将 连接到该服务网关的该 PLMN 的至少一个会话切换到该服务网关之外的服 务网关。
第三方面， 提出了一种移动性管理实体装置， 包括： 接收单元， 用于接 收至少一个服务网关下的公共陆地移动网络 PLMN 的当前负载信息和负载 门限；选择单元，用于根据会话所属 PLMN在该至少一个服务网关中的当前 负载信息、 负载门限和该会话的业务流量信息， 从该至少一个服务网关中选 择符合该会话的业务流量需求的服务网关； 发送单元， 用于向该符合该会话 的业务流量需求的服务网关发送该会话的建立请求。
在第一种可能的实现方式中， 结合第三方面， 具体实现为： 该至少一个 服务网关下的 PLMN 的当前负载信息和负载门限由该至少一个服务网关主 动发送。
在第二种可能的实现方式中， 结合第三方面， 具体实现为： 该发送单元 还用于向该至少一个服务网关发送第一负载查询请求以便该接收单元接收 该至少一个月良务网关下的 PLMN的当前负载信息和负载门限。
在第三种可能的实现方式中， 结合第三方面， 具体实现为： 该发送单元 还用于向服务器发送第二负载查询请求以便该接收单元接收该至少一个服 务网关下的 PLMN的当前负载信息和负载门限，其中该服务器中记录至少一 个服务网关下各 PLMN的当前负载信息和负载门限。 附图说明
为了更清楚地说明本发明实施例的技术方案， 下面将对实施例或现有技 术描述中所需要使用的附图作筒单地介绍， 显而易见地， 下面描述中的附图 仅仅是本发明的一些实施例， 对于本领域普通技术人员来讲， 在不付出创造 性劳动的前提下， 还可以根据这些附图获得其他的附图。
图 1是本发明实施例运营商共享网络的流量控制方法流程图。
图 2是本发明实施例运营商共享网络的流量控制方法交互流程图。 图 3 是本发明实施例运营商共享网络的流量控制方法的另一交互流程 图。
图 4 是本发明实施例运营商共享网络的流量控制方法的另一交互流程 图。
图 5 是本发明实施例运营商共享网络的流量控制方法的另一交互流程 图。
图 6是本发明实施例服务网关的结构示意图。
图 7是本发明实施例移动性管理实体装置的另一结构示意图。
图 8是本发明实施例服务网关的另一结构示意图。
图 9是本发明实施例移动性管理实体装置的结构示意图。 具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行 清楚、 完整地描述， 显然， 所描述的实施例是本发明一部分实施例， 而不是 全部的实施例。 基于本发明中的实施例， 本领域普通技术人员在没有做出创 造性劳动前提下所获得的所有其他实施例， 都属于本发明保护的范围。
本发明的技术方案， 可以应用于各种通信***， 例如： 全球移动通讯系 统（ GSM, Global System of Mobile communication ), 码分多址（ CDMA, Code Division Multiple Access ) ***， 宽带码分多址（ WCDMA, Wideband Code Division Multiple Access Wireless ),通用分组无线业务 ( GPRS, General Packet Radio Service ), 长期演进 ( LTE, Long Term Evolution )等。
基站，可以是 GSM或 CDMA中的基站（ BTS, Base Transceiver Station ), 也可以是 WCDMA中的基站（NodeB ),还可以是 LTE中的演进型基站（ eNB 或 e-NodeB, evolutional Node B ), 本发明并不限定， 但为描述方便， 下述实 施例以 eNB为例进行说明。
图 1是本发明实施例运营商共享网络的流量控制方法流程图， 图 1的方 法由移动性管理实体 ( Mobility Management Entity, MME )执行。
101 , 获取用户设备的会话所属的公共陆地移动网络 （Public Land
Mobility Network , PLMN )在服务网关下的当前负载信息和负载门限。
在一个国家或地区，一个运营商的一种制式的蜂窝移动通信网络被称为 PLMN。 PLMN由政府或它所批准的经营者， 为公众提供陆地移动通信业务 目的而建立和经营的网络。 该网络可以与公共交换电话网络 （Public Swithed Telephone Network, PSTN)等其他通信网络互联互通， 形成整个地区或国家 规模的通信网。 目前， 由于一种业务对应的制式蜂窝移动通信网络有一种， 因此， 本发明实施例中， PLMN可以筒单地认为是运营商。
102, 根据该会话的业务流量信息、 该 PLMN在服务网关下的当前负载 信息和该 PLMN在服务网关下的负载门限控制该 PLMN在服务网关下的负 载均衡。
该 PLMN的负载门限， 指该 PLMN在服务网关中允许使用的业务流量 的门限值。
本发明实施例中， 通过根据会话的业务流量、 PLMN在服务网关下的当 前负载及 PLMN在服务网关下的负载门限控制 PLMN在服务网关下的负载 均衡， 避免了运营商在服务网关下的资源过载。
可选地，该 PLMN在该服务网关的负载门限为预定的门限或根据运营策 略调整的门限。 运营策略， 可以是带宽份额的控制策略， 或者是根据各运营 商的临时需求做的调整策略， 当然， 也不排除其它可能导致份额发生变化的 情况。
不妨支设运营商 A运营管理的通信网络中，为运营商 C和 D分配一 定的网络带宽份额， 并假设运营商 A下至少管理着服务网关 1、 2和 3。 运 营商 A为运营商 C和 D配置的网络带宽份额，可以是所有服务网关都按 照相同的份额比例， 也可以为不同的服务网关分配不同的份额比例， 例如， 运营商 B、 C和 D在服务网关 1、 2和 3均是 40%、 30%、 30%, 或者运营 商 C和 D在服务网关 1是 40%、 30%、 30%,在服务网关 2是 30%、 35%、 35%, 在服务网关 3是 20%、 30%、 50%。 另外， 运营商 A还可根据带宽份 额的控制策略， 灵活调整各运营商在服务网关中占据的份额。
可选地， 作为一个实施例， 获取用户设备的会话所属的公共陆地移动网 络 PLMN在服务网关下的当前负载信息可包括：该服务网关接收 MME发送 的该会话的建立请求，该会话的建立请求携带该 PLMN的标识信息，服务网 关根据该 PLMN的标识信息获取该 PLMN的当前负载信息。
会话所属的 PLMN的标识信息， 可以是用于区别不同 PLMN的信息， 例如， PLMN名称， PLMN的 ID号、 编号， 等等， 本发明在此并不作限制。
进一步地， 该会话的建立请求中还可携带该会话的业务流量信息。
进一步地，根据该会话的业务流量信息、该 PLMN在服务网关下的当前 负载信息和该 PLMN在服务网关下的负载门限控制该 PLMN在服务网关下 的负载均衡可包括： 该服务网根据该会话的业务流量信息、该 PLMN在服务 网关下的当前负载信息和该 PLMN在服务网关下的负载门限确定是否允许 在该服务网关下建立该会话的承载。
进一步地，服务网关根据该会话的业务流量信息、该 PLMN在服务网关 下的当前负载信息和该 PLMN在服务网关下的负载门限确定是否允许在该 服务网关下建立该会话的承载可包括：如果该会话的业务流量与该 PLMN在 服务网关下的当前负载小于该 PLMN在服务网关下的负载门限，则该服务网 关向该 MME发送该会话的建立确认消息以便该 MME建立该会话的 7 载； 或者， 如果该会话的业务流量与该 PLMN在服务网关下的当前负载大于该 PLMN在服务网关下的负载门限， 则该服务网关向该 MME发送该会话的建 立拒绝消息以便该 MME重新选择服务网关以发送该会话的建立请求。
可选地，作为一个实施例， 该方法还可包括： 如果该 PLMN在该服务网 关的流量超限，则该服务网关向该 MME发送该 PLMN流量超限的指示信息， 以便该 MME将连接到该服务网关的该 PLMN的至少一个会话切换到该服务 网关之外的其它服务网关。 进一步地， MME可通过会话所属的用户设备的 位置区更新过程或切换过程，将该至少一个会话切换到该服务网关之外的其 它服务网关， 以实现会话所属用户设备的业务重定向。
可选地， 作为另一个实施例， 获取用户设备的会话所属的公共陆地移动 网络 PLMN在服务网关下的当前负载信息可包括： MME接收至少一个服务 网关发送的 PLMN的当前负载信息；或者，该 MME接收服务器根据该 MME 的负载查询请求发送的负载信息， 该负载信息包括记录在该服务器的至少一 个服务网关下的 PLMN的当前负载信息。
进一步地，根据该会话的业务流量信息、该 PLMN在服务网关下的当前 负载信息和该 PLMN在服务网关下的负载门限控制该 PLMN在服务网关下 的负载均衡可包括： 该 MME根据该会话的业务流量信息、该 PLMN在服务 网关下的当前负载信息和该 PLMN在服务网关下的负载门限从该至少一个 服务网关中选择符合该 PLMN的负载门限要求的服务网关，并向以发送该会 话的建立请求。
下面结合具体例子， 更加详细的描述本发明的具体实施例。
图 2是本发明实施例运营商共享网络的流量控制方法交互流程图。
201 , UE通过 eNB向 MME发送附着请求。
202, MME根据 UE 的附着请求向归属用户服务器 (Home Subscriber Server, HSS)发送安全认证请求。
203 , HSS根据安全认证请求发送安全认证反馈消息。
204, 当安全认证反馈消息指示安全认证通过时， MME通过 UE的安全 认证。
205, UE发起位置区更新过程。
上述步骤 201-205属于现有技术的内容， 本发明实施例在此不再详细赘 述。
206, MME根据用户的附着请求向服务网关（Severing Gateway, SGW ) 发送会话建立请求。 其中， 该会话建立请求携带会话所属的运营商的标识信 息及会话的业务流量信息。 运营商的标识信息， 可以是运营商的名称， 编码 或者其它能够标识会话归属的运行商的信息， 本发明在此不作限制。
207, SGW根据会话建立请求， 获取会话所属运行商的负载门限和当前 负载信息， 并结合当前会话的业务流量信息判断是否允许会话建立。 可通过 判断该会话的业务流量与运营商的当前负载之和与运营商的负载门限之间 的关系， 从而判断建立当前会话是否会导致运营商的业务流量超限。 如果建 立当前会话不会导致运营商的业务流量超出负载门限， 则接纳该会话所对应 的承载的建立， 并向 MME发送会话建立确认消息。
208 , UE发起 RRC建立重配置过程。
209, 附着流程（可参考 3GPP TS23.401 5.3,2 )。
步骤 208和步骤 209也属于现有技术的内容，本发明在此不再详细赘述。 本发明实施例中， MME通过向服务网关发送用户的运营商信息及会话 的业务流量信息，使得服务网关能够根据运营商的负载情况决定是否建立用 户的会话， 从而实现服务网关内按运营商份额的负载均衡。
图 3 是本发明实施例运营商共享网络的流量控制方法的另一交互流程 图。
步骤 301-306与图 2的步骤 201-206类似， 本发明实施例在此不再详细 赘述。
307 , SGW1 根据会话建立请求， 获取会话所属运营商的负载门限和当 前负载信息， 并结合当前会话的业务流量信息判断是否允许会话建立。 可通 过判断该会话的业务流量与运营商的当前负载之和与运营商的负载门限之 间的关系， 从而判断建立当前会话是否会导致运营商的业务流量超限。 如果 建立该会话会导致运营商的业务流量超出负载门限， 则拒绝当前会话对应的 承载的建立， 并向 MME发送会话建立拒绝消息。
308 , MME在收到会话建立拒绝消息后， 向 SGW2发送会话建立请求。 其中， SGW2是不同于 SGW1的服务网关， MME向 SGW2发送会话建立请 求后的步骤， 与第一次向服务网关发送会话建立请求后的步骤类似， 本发明 实施例在此不再详细赘述。
本发明实施例中， 在收到服务网关的会话建立请求拒绝消息后， MME 可重新选择服务网关以建立会话请求。
图 4 是本发明实施例运营商共享网络的流量控制方法的另一交互流程 图。
401 , UE通过 eNB向 MME发送附着请求。
402, 服务网关向 MME发送服务网关下各 PLMN的当前负载信息及负 载门限。
服务网关将各 PLMN在服务网关中的当前负载信息及负载门限等负载 相关信息发送给 MME。 在负载门限没有发生变化的情况下， 负载门限只需 在第一次发送负载相关信息时发送， 而当前负载信息在每次发送负载相关信 息时都需要发送。 可选地， 服务网关可主动向 MME发送负载相关信息， 例 如， 定时向 MME发送负载相关信息。或者， 可选地，服务网关可根据 MME 发送的负载查询请求向 MME发送负载相关信息。
另外， 如果服务网关是主动向 MME发送负载相关信息， 则步骤 401和 步骤 402没有时间上的先后关系。 但如果服务网关是根据 MME发送的负载 查询请求向 MME发送负载相关信息， 则步骤 402在步骤 401之后。
403, MME根据会话所属 PLMN的当前负载信息及负载门限、 会话的 业务流量信息选择 SGW1 , 其中 SGW1中的该会话所属 PLMN未分配的带 宽份额符合会话的业务流量要求。
MME根据接收到的负载相关信息， 从中选择符合会话的业务流量要求 的服务网关。 该服务网关中会话所述 PLMN的未分配带宽份额 (负载门限- 当前负载）大于或等于会话的业务流量。 图 4中， 不妨假设 SGW1为符合会 话的业务流量要求的服务网关。
404, MME向 SGW1发送会话的建立请求。
405 , SGW1向 MME发送建立确认消息。
步骤 404和步骤 405属于现有技术的内容，本发明实施例在此不再详细 赘述。
图 5 是本发明实施例运营商共享网络的流量控制方法的另一交互流程 图。
501 , UE通过 eNB向 MME发送附着请求。
502 , 服务网关向动态主机设置协议 （ Dynamic Host Configuration Protocol, DHCP )服务器发送服务网关下各 PLMN 的当前负载信息及负载 门限。
其中， DCHP服务器上记录至少一个服务网关的负载相关信息， 该负载 相关信息包括服务网关下各 PLMN的当前负载信息及负载门限。
应理解， 还可能有其它的服务器取代本发明实施例中的 DHCP服务器， 用以记录各个服务网关下各 PLMN的当前负载信息及负载门限，本发明在此 不作限制。
需要特别指出， 步骤 501和步骤 502并没有时间上的先后关系。
503, MME向 DHCP服务器发送负载查询请求。 根据 UE的附着请求， MME向 DHCP服务器发起负载查询请求， 以便 获取各个服务网关下的 PLMN的当前负载信息及负载门限。
504, DHCP服务器向 MME发送至少一个服务网关下的会话所属 PLMN 的当前负载信息及负载门限。
DHCP服务器可以选择发送全部服务网关的负载相关信息， 也可以只选 择符合条件的服务网关的负载相关信息。 服务网关的负载相关信息， 可以只 包括会话所属的 PLMN在服务网关下的当前负载信息及负载门限，也可以包 括服务网关下各 PLMN的当前负载信息及负载门限。
505 , MME根据会话所属 PLMN的当前负载信息及负载门限、 会话的 业务流量信息选择 SGW1 , 其中 SGW1中的该会话所属 PLMN未分配的带 宽份额符合会话的业务流量要求。
MME根据接收到的负载相关信息， 从中选择符合会话的业务流量要求 的服务网关。 该服务网关中会话所述 PLMN的未分配带宽份额 (负载门限- 当前负载）大于或等于会话的业务流量。 图 5中， 不妨假设 SGW1为符合会 话的业务流量要求的服务网关。
506, MME向 SGW1发送会话的建立请求。
507, SGW1向 MME发送建立确认消息。
步骤 506和步骤 507属于现有技术的内容，本发明实施例在此不再详细 赘述。
图 6是本发明实施例服务网关 600的结构示意图。服务网关 600可包括： 接收单元 601、 确定单元 602和发送单元 603。
接收单元 601 ,可接收移动性管理实体 MME发送的会话建立请求信息， 该会话建立请求信息包括该会话所属的公共陆地移动网络 PLMN 的标识信 息和该会话的业务流量信息。
确定单元 602 , 可才艮据该 PLMN的负载门限、 该 PLMN的当前负载信 息和该会话的业务流量信息确定对该会话建立请求的反馈信息，该反馈信息 包括该会话的建立确认信息或者该会话的建立拒绝信息。
发送单元 603 , 可向该 MME发送该反馈信息。
本发明实施例中， 服务网关 600通过根据 MME的会话建立请求， 获取 当前会话所属 PLMN(运营商）及会话的业务流量信息，并可根据当前 PLMN 的负载情况决定是否允许该会话的建立，从而控制 PLMN在服务网关下的负 载均衡， 避免了 PLMN在服务网关下的资源过载。
可选地，该 PLMN的负载门限为预定的门限或者根据运营策略调整的门 限。
可选地，作为一个实施例，如果该会话的业务流量与该 PLMN在服务网 关下的当前负载小于该 PLMN在服务网关下的负载门限， 则确定单元 602 可确定该会话的建立确认消息以便指示该 MME建立该会话的承载。
可选地，作为另一个实施例，如果该会话的业务流量与该 PLMN在服务 网关下的当前负载大于该 PLMN在服务网关下的负载门限，则确定单元 602 可确定该会话的建立拒绝消息以便指示该 MME重新选择服务网关以发送该 会话的建立请求。
可选地， 作为另一个实施例， 如果该 PLMN在该服务网关的流量超限， 则发送单元 603还可向该 MME发送该 PLMN流量超限的指示信息，以便该 MME将连接到该服务网关的该 PLMN的至少一个会话切换到该服务网关之 外的服务网关。
服务网关 600还可实现图 2所示实施例中的 SGW或图 3所示实施例中
SGW1、 SGW2的功能， 本发明在此不再赘述。
图 7是本发明实施例移动性管理实体 700的结构示意图。移动性管理实 体装置 700可包括： 接收单元 701 , 选择单元 702和发送单元 703。
接收单元 701 , 可接收至少一个服务网关下的公共陆地移动网络 PLMN 的当前负载信息和负载门限。
选择单元 702,可根据会话所属 PLMN在该至少一个服务网关中的当前 负载信息、 负载门限和该会话的业务流量信息， 从该至少一个服务网关中选 择符合该会话的业务流量需求的服务网关。
发送单元 703, 可向该符合所述会话的业务流量需求的服务网关发送该 会话的建立请求。
本发明实施例中，移动性管理实体 700通过获取会话所属 PLMN在各个 服务网关中的当前负载信息和负载门限， 并从中选择符合会话的业务流量需 求的服务网关以发送该会话的建立请求，从而控制 PLMN在服务网关下的负 载均衡， 避免了 PLMN在服务网关下的资源过载。
可选地，作为一个实施例，该至少一个服务网关下的 PLMN的当前负载 信息和负载门限由该至少一个服务网关主动发送。 可选地， 作为另一个实施例， 发送单元 703还可向该至少一个服务网关 发送第一负载查询请求以便接收单元 701 接收该至少一个服务网关下的 PLMN的当前负载信息和负载门限。
可选地， 作为另一个实施例， 发送单元 703还可向服务器发送第二负载 查询请求以便接收单元 701接收该至少一个服务网关下的 PLMN的当前负载 信息和负载门限，其中该服务器中记录至少一个服务网关下各 PLMN的当前 负载信息和负载门限。
实施例移动性管理实体 700还可实现图 4或图 5所示实施例中的 MME 的功能， 本发明在此不再赘述。
图 8是本发明实施例服务网关 800的结构示意图。服务网关 800可包括： 发射电路 801、 处理器 802和存储器 803和接收电路 804。
接收电路 804,可接收移动性管理实体 MME发送的会话建立请求信息， 该会话建立请求信息包括该会话所属的公共陆地移动网络 PLMN 的标识信 息和该会话的业务流量信息。
处理器 802, 可根据该 PLMN的负载门限、 该 PLMN的当前负载信息 和该会话的业务流量信息确定对该会话建立请求的反馈信息， 该反馈信息包 括该会话的建立确认信息或者该会话的建立拒绝信息。
存储器 803 ,可存储使得处理器 802根据该 PLMN的负载门限、该 PLMN 的当前负载信息和该会话的业务流量信息确定对该会话建立请求的反馈信 息的指令。
发射电路 801 , 可向该 MME发送该反馈信息。
本发明实施例中， 服务网关 800通过根据 MME的会话建立请求， 获取 当前会话所属 PLMN(运营商）及会话的业务流量信息，并可根据当前 PLMN 的负载情况决定是否允许该会话的建立，从而控制 PLMN在服务网关下的负 载均衡， 避免了 PLMN在服务网关下的资源过载。
处理器 802控制服务网关 800 的操作， 处理器 802还可以称为 CPU ( Central Processing Unit, 中央处理单元）。 存储器 803可以包括只读存储器 和随机存取存储器， 并向处理器 802提供指令和数据。 存储器 803的一部分 还可以包括非易失性随机存取存储器（NVRAM )。 具体的应用中， 发射电路 801和接收电路 804可以耦合到天线 805。 服务网关 800的各个组件通过总 线*** 806耦合在一起， 其中总线*** 806除包括数据总线之外， 还可以包 括电源总线、 控制总线和状态信号总线等。 但是为了清楚说明起见， 在图中 将各种总线都标为总线*** 806。
上述本发明实施例揭示的方法可以应用于处理器 802中，或者由处理器 802实现。 处理器 802可能是一种集成电路芯片， 具有信号的处理能力。 在 实现过程中， 上述方法的各步骤可以通过处理器 802中的硬件的集成逻辑电 路或者软件形式的指令完成。 上述的处理器 802可以是通用处理器、 数字信 号处理器（DSP )、 专用集成电路（ASIC )、 现成可编程门阵列 （FPGA )或 者其他可编程逻辑器件、 分立门或者晶体管逻辑器件、 分立硬件组件。 可以 实现或者执行本发明实施例中的公开的各方法、 步骤及逻辑框图。 通用处理 器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本发明 实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成， 或者 用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存 储器， 闪存、 只读存储器， 可编程只读存储器或者电可擦写可编程存储器、 寄存器等本领域成熟的存储介质中。该存储介质位于存储器 803,处理器 802 读取存储器 803中的信息， 结合其硬件完成上述方法的步骤。
可选地，该 PLMN的负载门限为预定的门限或者根据运营策略调整的门 限。
可选地，作为一个实施例，如果该会话的业务流量与该 PLMN在服务网 关下的当前负载小于该 PLMN在服务网关下的负载门限，则处理器 802可确 定该会话的建立确认消息以便指示该 MME建立该会话的承载。
可选地，作为另一个实施例，如果该会话的业务流量与该 PLMN在服务 网关下的当前负载大于该 PLMN在服务网关下的负载门限， 则处理器 802 可确定该会话的建立拒绝消息以便指示该 MME重新选择服务网关以发送该 会话的建立请求。
可选地， 作为另一个实施例， 如果该 PLMN在该服务网关的流量超限， 则发射电路 804还可向该 MME发送该 PLMN流量超限的指示信息，以便该 MME将连接到该服务网关的该 PLMN的至少一个会话切换到该服务网关之 外的服务网关。
服务网关 800还可实现图 2所示实施例中的 SGW或图 3所示实施例中 SGW1、 SGW2的功能， 本发明在此不再赘述。
图 9是本发明实施例移动性管理实体装置 900的结构示意图。移动性管 理实体装置 900可包括发射电路 901、 接收电路 904、 处理器 902和存储器 903。
接收电路 904, 可接收至少一个服务网关下的公共陆地移动网络 PLMN 的当前负载信息和负载门限。
处理器 902,可根据会话所属 PLMN在该至少一个服务网关中的当前负 载信息、 负载门限和该会话的业务流量信息， 从该至少一个服务网关中选择 符合该会话的业务流量需求的服务网关。
存储器 903,可存储使得处理器 902根据会话所属 PLMN在该至少一个 服务网关中的当前负载信息、 负载门限和该会话的业务流量信息， 从该至少 一个服务网关中选择符合该会话的业务流量需求的服务网关的指令。
发射电路 901 , 可向该符合所述会话的业务流量需求的服务网关发送该 会话的建立请求。
本发明实施例中， 移动性管理实体装置 900通过获取会话所属 PLMN 在各个服务网关中的当前负载信息和负载门限， 并从中选择符合会话的业务 流量需求的服务网关以发送该会话的建立请求，从而控制 PLMN在服务网关 下的负载均衡， 避免了 PLMN在服务网关下的资源过载。
处理器 902控制移动性管理实体装置 900的操作，处理器 902还可以称 为 CPU ( Central Processing Unit, 中央处理单元）。 存储器 903可以包括只读 存储器和随机存取存储器， 并向处理器 902提供指令和数据。 存储器 903的 一部分还可以包括非易失性随机存取存储器（ NVRAM )。 具体的应用中， 发 射电路 901和接收电路 904可以耦合到天线 905。 移动性管理实体装置 900 的各个组件通过总线*** 906耦合在一起，其中总线*** 906除包括数据总 线之外， 还可以包括电源总线、 控制总线和状态信号总线等。 但是为了清楚 说明起见， 在图中将各种总线都标为总线*** 906。
上述本发明实施例揭示的方法可以应用于处理器 902中，或者由处理器
902实现。 处理器 902可能是一种集成电路芯片， 具有信号的处理能力。 在 实现过程中， 上述方法的各步骤可以通过处理器 902中的硬件的集成逻辑电 路或者软件形式的指令完成。 上述的处理器 902可以是通用处理器、 数字信 号处理器（DSP )、 专用集成电路（ASIC )、 现成可编程门阵列 （FPGA )或 者其他可编程逻辑器件、 分立门或者晶体管逻辑器件、 分立硬件组件。 可以 实现或者执行本发明实施例中的公开的各方法、 步骤及逻辑框图。 通用处理 器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本发明 实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成， 或者 用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存 储器， 闪存、 只读存储器， 可编程只读存储器或者电可擦写可编程存储器、 寄存器等本领域成熟的存储介质中。该存储介质位于存储器 903,处理器 902 读取存储器 903中的信息， 结合其硬件完成上述方法的步骤。
可选地，作为一个实施例，该至少一个服务网关下的 PLMN的当前负载 信息和负载门限由该至少一个服务网关主动发送。
可选地， 作为另一个实施例， 发射电路 901还可向该至少一个服务网关 发送第一负载查询请求以便接收电路 904 接收该至少一个服务网关下的 PLMN的当前负载信息和负载门限。
可选地， 作为另一个实施例， 发射电路 901还可向服务器发送第二负载 查询请求以便接收电路 904接收该至少一个服务网关下的 PLMN的当前负载 信息和负载门限，其中该服务器中记录至少一个服务网关下各 PLMN的当前 负载信息和负载门限。
实施例移动性管理实体 900还可实现图 4或图 5所示实施例中的 MME 的功能， 本发明在此不再赘述。
应理解， 在本发明的各种实施例中， 上述各过程的序号的大小并不意味 着执行顺序的先后， 各过程的执行顺序应以其功能和内在逻辑确定， 而不应 对本发明实施例的实施过程构成任何限定。
本领域普通技术人员可以意识到， 结合本文中所公开的实施例描述的各 示例的单元及算法步骤， 能够以电子硬件、 或者计算机软件和电子硬件的结 合来实现。 这些功能究竟以硬件还是软件方式来执行， 取决于技术方案的特 定应用和设计约束条件。 专业技术人员可以对每个特定的应用来使用不同方 法来实现所描述的功能， 但是这种实现不应认为超出本发明的范围。
所属领域的技术人员可以清楚地了解到， 为描述的方便和筒洁， 上述描 述的***、 装置和单元的具体工作过程， 可以参考前述方法实施例中的对应 过程， 在此不再赘述。
在本申请所提供的几个实施例中， 应该理解到， 所揭露的***、 装置和 方法， 可以通过其它的方式实现。 例如， 以上所描述的装置实施例仅仅是示 意性的， 例如， 所述单元的划分， 仅仅为一种逻辑功能划分， 实际实现时可 以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个 ***， 或一些特征可以忽略， 或不执行。 另一点， 所显示或讨论的相互之间 的耦合或直接耦合或通信连接可以是通过一些接口， 装置或单元的间接耦合 或通信连接， 可以是电性， 机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作 为单元显示的部件可以是或者也可以不是物理单元， 即可以位于一个地方， 或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或 者全部单元来实现本实施例方案的目的。
另外， 在本发明各个实施例中的各功能单元可以集成在一个处理单元 中， 也可以是各个单元单独物理存在， 也可以两个或两个以上单元集成在一 个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使 用时， 可以存储在一个计算机可读取存储介质中。 基于这样的理解， 本发明 的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部 分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质 中， 包括若干指令用以使得一台计算机设备（可以是个人计算机， 服务器， 或者网络设备等）执行本发明各个实施例所述方法的全部或部分步骤。 而前 述的存储介质包括： U盘、移动硬盘、只读存储器（ ROM, Read-Only Memory )、 随机存取存储器（RAM, Random Access Memory ), 磁碟或者光盘等各种可 以存储程序代码的介质。
以上所述， 仅为本发明的具体实施方式， 但本发明的保护范围并不局限 于此， 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内， 可轻易 想到变化或替换， 都应涵盖在本发明的保护范围之内。 因此， 本发明的保护 范围应以所述权利要求的保护范围为准。

Claims

权利要求
1、 一种运营商共享网络的流量控制方法， 其特征在于， 包括： 获取用户设备的会话所属的公共陆地移动网络 PLMN在服务网关下的 当前负载信息和负载门限；
根据所述会话的业务流量信息、所述 PLMN在服务网关下的当前负载信 息和所述 PLMN在服务网关下的负载门限控制所述 PLMN在服务网关下的 负载均衡。
2、 如权利要求 1所述的方法， 其特征在于， 所述 PLMN在所述服务网 关的负载门限为预定的门限或根据运营策略调整的门限。
3、 如权利要求 1或 2所述的方法， 其特征在于，
所述获取用户设备的会话所属的公共陆地移动网络 PLMN在服务网关 下的当前负载信息包括： 所述服务网关接收 MME发送的所述会话的建立请 求， 所述会话的建立请求携带所述 PLMN的标识信息；
所述服务网关根据所述 PLMN的标识信息获取所述 PLMN的当前负载 信息。
4、 如权利要求 3所述的方法， 其特征在于， 所述根据所述会话的业务 流量信息、 所述 PLMN在服务网关下的当前负载信息和所述 PLMN在服务 网关下的负载门限控制所述 PLMN在服务网关下的负载均衡包括：
所述服务网关根据所述会话的业务流量信息、所述 PLMN在服务网关下 的当前负载信息和所述 PLMN在服务网关下的负载门限确定是否允许在所 述服务网关下建立所述会话的承载。
5、 如权利要求 4所述的方法， 其特征在于， 所述服务网关根据所述会 话的业务流量信息、所述 PLMN在服务网关下的当前负载信息和所述 PLMN 在服务网关下的负载门限确定是否允许在所述服务网关下建立所述会话的 承载包括：
如果所述会话的业务流量与所述 PLMN在服务网关下的当前负载小于 所述 PLMN在服务网关下的负载门限，则所述服务网关向所述 MME发送所 述会话的建立确认消息以便所述 MME建立所述会话的承载； 或者
如果所述会话的业务流量与所述 PLMN在服务网关下的当前负载大于 所述 PLMN在服务网关下的负载门限，则所述服务网关向所述 MME发送所 述会话的建立拒绝消息以便所述 MME重新选择服务网关以发送所述会话的 建立请求。
6、 如权利要求 3至 5任一项所述的方法， 其特征在于， 还包括： 如果 所述 PLMN在所述服务网关的流量超限，则所述服务网关向所述 MME发送 所述 PLMN流量超限的指示信息，以便所述 MME将连接到所述服务网关的 所述 PLMN的至少一个会话切换到所述服务网关之外的服务网关。
7、 如权利要求 1或 2所述的方法， 其特征在于， 所述获取用户设备的 会话所属的公共陆地移动网络 PLMN在服务网关下的当前负载信息包括：
MME接收至少一个服务网关发送的 PLMN的当前负载信息； 或者 所述 MME接收服务器根据所述 MME的负载查询请求发送的负载信息， 所述负载信息包括记录在所述服务器的至少一个服务网关下的 PLMN 的当 前负载信息。
8、 如权利要求 7所述的方法， 其特征在于， 所述根据所述会话的业务 流量信息、 所述 PLMN在服务网关下的当前负载信息和所述 PLMN在服务 网关下的负载门限控制所述 PLMN在服务网关下的负载均衡包括：
所述 MME根据所述会话的业务流量信息、所述 PLMN在服务网关下的 当前负载信息和所述 PLMN在服务网关下的负载门限从所述至少一个服务 网关中选择符合所述会话的业务流量需求的服务网关， 并向所述符合所述会 话的业务流量需求的服务网关发送所述会话的建立请求以建立所述会话的 承载。
9、 一种服务网关， 其特征在于， 包括：
接收单元， 用于接收移动性管理实体 MME发送的会话建立请求信息， 所述会话建立请求信息包括所述会话所属的公共陆地移动网络 PLMN 的标 识信息和所述会话的业务流量信息；
确定单元， 用于根据所述 PLMN的负载门限、 所述 PLMN的当前负载 信息和所述会话的业务流量信息确定对所述会话建立请求的反馈信息， 所述 反馈信息包括所述会话的建立确认信息或者所述会话的建立拒绝信息；
发送单元， 用于向所述 MME发送所述反馈信息。
10、 如权利要求 9所述的服务网关， 其特征在于，
如果所述会话的业务流量与所述 PLMN在服务网关下的当前负载小于 所述 PLMN在服务网关下的负载门限，则所述确定单元用于确定所述会话的 建立确认消息以便指示所述 MME建立所述会话的承载； 或者 如果所述会话的业务流量与所述 PLMN在服务网关下的当前负载大于 所述 PLMN在服务网关下的负载门限，则所述确定单元用于确定所述会话的 建立拒绝消息以便指示所述 MME重新选择服务网关以发送所述会话的建立 请求。
11、如权利要求 9或 10所述的服务网关，其特征在于，如果所述 PLMN 在所述服务网关的流量超限， 则所述发送单元还用于向所述 MME发送所述 PLMN流量超限的指示信息， 以便所述 MME将连接到所述服务网关的所述 PLMN的至少一个会话切换到所述服务网关之外的服务网关。
12、 一种移动性管理实体装置， 其特征在于， 包括：
接收单元， 用于接收至少一个服务网关下的公共陆地移动网络 PLMN 的当前负载信息和负载门限；
选择单元，用于根据会话所属 PLMN在所述至少一个服务网关中的当前 负载信息、 负载门限和所述会话的业务流量信息， 从所述至少一个服务网关 中选择符合所述会话的业务流量需求的服务网关；
发送单元，用于向所述符合所述会话的业务流量需求的服务网关发送所 述会话的建立请求。
13、 如权利要求 12所述的移动性管理实体装置， 其特征在于， 所述至少一个服务网关下的 PLMN 的当前负载信息和负载门限由所述 至少一个服务网关主动发送。
14、 如权利要求 12所述的移动性管理实体装置， 其特征在于， 所述发送单元还用于向所述至少一个服务网关发送第一负载查询请求 以便所述接收单元接收所述至少一个服务网关下的 PLMN 的当前负载信息 和负载门限。
15、 如权利要求 12所述的移动性管理实体装置， 其特征在于， 所述发送单元还用于向服务器发送第二负载查询请求以便所述接收单 元接收所述至少一个服务网关下的 PLMN的当前负载信息和负载门限，其中 所述服务器中记录至少一个服务网关下各 PLMN 的当前负载信息和负载门 限。
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