WO2017063402A1 - Station de base, entité de gestion de mobilité, procédé et système de délestage - Google Patents

Station de base, entité de gestion de mobilité, procédé et système de délestage Download PDF

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Publication number
WO2017063402A1
WO2017063402A1 PCT/CN2016/089224 CN2016089224W WO2017063402A1 WO 2017063402 A1 WO2017063402 A1 WO 2017063402A1 CN 2016089224 W CN2016089224 W CN 2016089224W WO 2017063402 A1 WO2017063402 A1 WO 2017063402A1
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WO
WIPO (PCT)
Prior art keywords
management entity
mobility management
load
base station
target
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Application number
PCT/CN2016/089224
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English (en)
Chinese (zh)
Inventor
卜翘楚
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中兴通讯股份有限公司
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Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2017063402A1 publication Critical patent/WO2017063402A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/08—Load balancing or load distribution
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/22—Performing reselection for specific purposes for handling the traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information

Definitions

  • This document relates to, but is not limited to, the field of communication technologies, and in particular, to a base station, a mobility management entity, a load offloading method and system.
  • the load offload function can be used to Users of the MME or some MMEs are offloaded to other MMEs to achieve the effect of MME load balancing in the resource pool.
  • the user's S1 connection is released, so the user's service is affected.
  • the user is uninstalled. After the service is interrupted, the user immediately accesses the other MME to re-establish the user plane recovery data service. Therefore, the uninstallation has less impact on the users who use the data service.
  • VOLTE Voice Over LTE
  • the user is uninstalled, which will cause the voice service to be interrupted. , affecting the user experience, so the uninstallation has a greater impact on users who are using voice services.
  • the present invention provides a base station, a mobility management entity, a load offloading method, and a system, which can solve the problem that the MME load offloading method needs to interrupt user services in the related art.
  • This document provides a mobile management entity load offloading method, which includes:
  • the mobile management entity sends a load offload request message to the home base station of the user terminal if the user terminal performs communication service when performing load offloading;
  • the mobility management entity performs handover with the target mobility management entity.
  • the method further includes:
  • the communication service includes a data service and a voice service.
  • the foregoing method further includes:
  • the mobility management entity does not release the communication service of the user terminal.
  • This paper also provides a mobile management entity load offloading method, including:
  • the base station determines a target mobility management entity for load offloading
  • the base station sends an identifier of the target mobility management entity to the mobility management entity.
  • the target mobile management entity that determines, by the base station, that the load is offloaded includes:
  • the target mobility management entity is determined according to a weight ratio of each mobility management entity in the mobility management entity resource pool.
  • This paper also provides a mobile management entity load offloading method, including:
  • the mobile management entity sends a load offload request message to the home base station of the user terminal if the user terminal performs communication service when performing load offloading;
  • the mobility management entity receives an identifier of the target mobility management entity sent by the home base station; according to the identifier, the mobility management entity performs handover with the target mobility management entity.
  • This article also provides a mobile management entity that includes:
  • the first sending module is configured to: when the mobile management entity performs load unloading, if there is a user terminal performing communication service, sending a load offloading request message to the home base station of the user terminal;
  • the first receiving module is configured to receive an identifier of the target mobility management entity sent by the home base station;
  • the switching module is configured to perform switching with the target mobility management entity according to the identifier received by the first receiving module.
  • the switching module is further configured to notify the user terminal to perform a tracking area update operation to the target mobility management entity after performing handover with the target mobility management entity.
  • the communication service includes a data service and a voice service.
  • the switching module is further configured to not receive the identifier, or not to release the communication service of the user terminal when the handover with the target mobility management entity fails.
  • This document also provides a base station, including:
  • a first receiving module configured to receive a load offloading request message sent by the mobility management entity
  • a determination module configured to determine a target mobility management entity for load offloading
  • a first sending module configured to send an identifier of the target mobility management entity to the mobility management entity.
  • the determining, by the determining module, the target mobility management entity that determines the load offloading includes:
  • the target mobility management entity is determined according to a weight ratio of each mobility management entity in the mobility management entity resource pool.
  • This article also provides a mobile management entity load offloading system, including:
  • a mobility management entity configured to: when a user terminal performs a communication service, send a load offload request message to the home base station of the user terminal, and receive an identifier of the target mobility management entity sent by the home base station; Switching with the target mobility management entity according to the identifier;
  • a base station configured to receive a load offload request message sent by the mobility management entity; determine a target mobility management entity for load offloading; and send an identifier of the target mobility management entity to the mobility management entity.
  • This document provides an MME load offloading method.
  • the MME performs load offloading, it detects whether the user terminal in the attached user terminal has a communication service in progress, and sends a load offload request to the home base station for the user terminal that is performing the communication service. The message is switched according to the target MME that is sent by the base station, and is switched to the target MME.
  • the MME load unloading in the related art can be solved in the related process, because the target MME belongs to the resource pool under the same base station, and the communication service of the user is not interrupted during the handover process.
  • the method needs to interrupt the user's business and enhance the user's experience.
  • the MME does not release the service connection of the user terminal, and thus does not cause service interruption.
  • FIG. 1 is a schematic structural diagram of an MME load offloading system according to Embodiment 1 of the present invention.
  • FIG. 3 is a schematic structural diagram of an MME load offloading system according to Embodiment 3 of the present invention.
  • FIG. 4 is a flowchart of an MME load offloading method according to Embodiment 4 of the present invention.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • FIG. 1 is a schematic structural diagram of an MME load offloading system according to Embodiment 1 of the present invention.
  • the MME load offloading system provided in this embodiment includes an MME 100 and a base station 200, where:
  • the MME 100 is configured to send a load offload request message to the home base station of the user terminal if there is a user terminal performing communication service when performing load offloading;
  • the base station 200 is configured to receive a load offloading request message sent by the mobility management entity, determine a target mobility management entity for load offloading, and send an identifier of the target mobility management entity to the MME 100;
  • the MME 100 is further configured to receive an identifier of the target mobility management entity sent by the home base station 200; according to the identifier, the mobility management entity performs handover with the target MME.
  • the MME 100 and the base station 200 provided herein will be described with reference to FIG. 1 .
  • the MME 100 may include:
  • the first sending module 110 is configured to: when the mobile management entity performs load unloading, if there is a user terminal performing communication service, send a load offloading request message to the home base station of the user terminal;
  • the first receiving module 120 is configured to receive an identifier of the target mobility management entity sent by the home base station;
  • the switching module 130 is configured to switch to the target mobility management entity according to the identifier.
  • the switching module 130 in the foregoing embodiment may be further configured to notify the user terminal to perform a tracking area update operation to the target mobility management entity after performing handover with the target mobility management entity.
  • the communication service in the foregoing embodiment may include a data service and a voice service.
  • the switching module 130 in the foregoing embodiment may be further configured to: if the identifier is not received, or the handover with the target mobility management entity fails, the communication service of the user terminal is not released.
  • the base station 200 may include:
  • the first receiving module 210 is configured to receive a load offloading request message sent by the mobility management entity
  • a determining module 220 configured to determine a target mobility management entity for load offloading
  • the first sending module 230 is configured to send an identifier of the target mobility management entity to the mobility management entity.
  • the determining module 220 determining that the target mobility management entity of the load offloading may include determining the target mobility management entity according to a weight ratio of each mobility management entity in the mobility management entity resource pool.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • FIG. 2 is a flowchart of an MME load offloading method according to Embodiment 2 of the present invention, which may be performed by FIG. 2 It is to be understood that, in this embodiment, the MME load offloading method includes the following steps S201 to S203:
  • the mobile management entity sends a load offload request message to the home base station of the user terminal if the user terminal performs communication service when performing load offloading;
  • the base station receives the load offloading request message sent by the mobility management entity, determines the target mobility management entity of the load offloading, and sends the identifier of the target mobility management entity to the mobility management entity.
  • the mobility management entity receives the identifier of the target mobility management entity sent by the home base station; according to the identifier, the mobility management entity performs handover with the target mobility management entity.
  • the embodiment of the MME load offloading method on the MME side may include the following operations:
  • the mobility management entity When the mobility management entity performs load offloading, if there is a user terminal performing communication service, the mobile management entity sends a load offload request message to the home base station of the user terminal;
  • the mobility management entity and the target mobility management entity switch.
  • the method further includes: notifying the user terminal to perform a tracking area update operation to the target mobility management entity.
  • the communication service in the foregoing embodiment includes a data service and a voice service.
  • the method in the foregoing embodiment may further include: if the identifier is not received, or the mobility management entity fails to switch with the target mobility management entity, the communication service of the user terminal is not released.
  • the embodiment of the MME load offloading method on the base station side includes the following operations:
  • the determining the target mobility management entity for load offloading comprises: determining a target mobility management entity according to a weight ratio of each mobility management entity in the mobility management entity resource pool.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • This document relates to the packet domain evolution domain in the mobile communication system, in particular, the VoIP (voice over long term evolution) user terminal in the LTE (Long Term Evolution) network is in the MME (Mobile Management Entity, core network).
  • the mobile management entity is the technology in the load unloading process.
  • the MME load is offloaded, the S1 connection of the user terminal is released, and thus the service of the user terminal is affected. If the user terminal is using the data service, the user terminal is uninstalled, and after the service is interrupted, the user terminal immediately accesses the other MME to re-establish the user plane recovery data service, so the offload has less impact on the user who uses the data service.
  • the voice service may be interrupted, and the user needs to re-call the phone to affect the user experience. Therefore, the uninstallation has a greater impact on the user terminal that is using the voice service.
  • the present embodiment is described by using a VOLTE voice service by a user terminal as an example, and overcomes the problem that the MME load unloading does not distinguish the VOLTE voice user in the related art, and provides a VOLTE voice user load.
  • the method of uninstalling is described by using a VOLTE voice service by a user terminal as an example, and overcomes the problem that the MME load unloading does not distinguish the VOLTE voice user in the related art, and provides a VOLTE voice user load. The method of uninstalling.
  • the method provided in this embodiment includes the following steps S401 to S405:
  • S401 The terminal establishes a dedicated bearer for the voice service.
  • the UE (the user terminal) initiates the attach and accesses the MME network element in the EPC (Evolved Packet Core) network; after the connection is successful, the UE initiates the PDN (Packet Data Network).
  • the call connection is maintained after the UE connects to the phone;
  • the MME (hereinafter referred to as the source MME) performs load offloading to determine that voice service exists.
  • the base station determines the target MME, and sends the identifier of the target MME to the source MME.
  • the eNodeB sends a HO Required message to the source MME, where the caus cause value of the message is “load balancing”; the carried Target ID is the current cell of the UE; and the eNodeB selects according to the weight ratio relationship of each MME in the MME Pool.
  • a suitable target MME, and the GUMMEI (Globally Unique MME Identifier) of the target MME is brought to the source MME in the HO Required message;
  • S404 The source MME performs handover with the target MME.
  • the source MME determines that the causal cause value is "load balancing”, parses the target MME address according to the GUMMEI of the target MME carried in the HO Required message, and sends a Forward Relocation Request message to the target MME;
  • the source MME and the target MME process the handover procedure normally.
  • the source MME does not uninstall the VOLTE voice user terminal, does not release the S1 connection of the user terminal, and maintains the call connection.
  • the embodiment solves the problem that the VOLTE voice user terminal is dropped during the load unloading process, achieves the effect that the voice call is not interrupted during the load unloading process, improves the experience of the VOLTE voice user, and reduces the voice call rate of the operator.
  • the source MME and the target MME are two different MMEs in the same MME resource pool, and the eNodeB is connected to the source and the target MME at the same time.
  • the MME load offloading method includes the following operations:
  • the UE initiates an attach procedure, and initiates an IMS PDN connection establishment after the attachment is completed. After the IMS PDN is established, the registration process of the IMS is initiated;
  • this step may include the following operations:
  • the UE initiates attaching, and sends an Attach Request message to the MME.
  • the MME After receiving the Attach Request, the MME, according to the TA (Tracking Area) and the APN (Access Point Name), the SGW (Serving Gateway), and the PGW (Public Data Network Gateway) address , send Create The session request message is sent to the GW (Gateway, gateway) to create a session;
  • TA Track Area
  • APN Access Point Name
  • SGW Serving Gateway
  • PGW Public Data Network Gateway
  • the Create Session Response message is sent to the MME, and the PDN address allocated to the UE is carried.
  • the MME sends an Attach Accept message to the UE, and carries the IMS VoPS Support Feature to notify the UE that the network supports the IMS VoPS (Voice Over Packet Service).
  • the UE initiates an IMS PDN connection request, and carries the APN of the IMS;
  • the MME sends a Create Session Request message to the GW to create an IMS session.
  • the GW returns a Create Session Response message, and the IMS session is successfully created.
  • the MME sends an E-RAB Setup Request/Activate Default EPS Bearer Context Request to the eNodeB and the UE to establish an IMS default bearer.
  • the IMS registration process is initiated by using the default bearer of the IMS.
  • the UE initiates an IMS voice call, and triggers a policy and charging rule function (PCRF) to initiate establishment of a voice dedicated bearer.
  • PCRF policy and charging rule function
  • this step may include the following operations:
  • the eNodeB establishes a voice dedicated bearer successfully, and returns an E-RAB Setup Response response message;
  • the UE establishes a voice dedicated bearer successfully, and returns an Activate Dedicated EPS Bearer Context Accept message;
  • the MME returns a successful Create Bearer Response response message, and notifies the GW that the voice bearer is successfully created.
  • the MME (hereinafter referred to as the source MME) performs load offloading, determines that the user terminal is performing VOLTE voice service, and sends a load offload request message to the eNodeB for IMS voice.
  • the bearer initiates the load unloading process
  • this step may include the following operations:
  • the eNodeB After receiving the load offload request message, the eNodeB sends the HO Required carry cause value of "load balancing", and the carried target node identifier Target ID is the current cell of the UE; the eNodeB selects according to the weight ratio relationship of each MME in the MME Pool.
  • a suitable MME is used as the target MME of the handover, and the GUMMEI of the target MME is brought to the source MME through the HO Required message;
  • the source MME After receiving the HO Required, the source MME checks the cause cause value as "load balancing", obtains the GUMMEI of the target MME in the HO Required message, parses the address of the target MME, and sends a Forward Relocation Request to the target MME;
  • the target MME sends an HO Request to the eNodeB to notify the eNodeB to prepare to switch resources.
  • the eNodeB returns a handover response message
  • the target MME returns a Forward Relocation Response message to the source MME.
  • the source MME sends a HO Command to notify the eNodeB to perform handover;
  • the eNodeB sends the HO Notify to notify the target MME that the handover is complete; and the eNodeB sends a load offload indication message to notify the UE to register with the target MME;
  • the target MME sends a Forward Relocation Complete Notification message to the source MME to notify the source MME that the handover is complete.
  • the source MME returns a Forward Relocation Complete Acknowledge message to confirm that the handover is completed.
  • the UE initiates a TAU (tracking area update) process in the connected state, and registers with the target MME.
  • TAU tracking area update
  • the embodiment of the present invention provides an MME load offloading scheme.
  • the MME performs load offloading, it detects whether the user terminal in the attached user terminal has a communication service being performed, and sends a user terminal to the home base station for the communication service.
  • the load offloading request message is switched with the target MME according to the target MME identifier fed back by the base station. Since the target MME belongs to the resource pool set up in the same base station, the communication service of the user terminal is not interrupted during the handover process, and the related technologies are solved.
  • the MME load offloading method needs to interrupt the user service and enhance the user experience.
  • the base station does not perform handover or the handover fails, the MME does not release the service connection of the user terminal, and does not cause service interruption.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne une station de base, une entité de gestion de mobilité (MME), et un procédé et un système de délestage. Le procédé comprend les étapes suivantes : lorsqu'une MME exécute un délestage, si un service de communication est en cours d'exécution par un terminal d'utilisateur, la MME transmet un message de demande de délestage à une station de base domestique du terminal d'utilisateur ; la station de base reçoit le message de demande de délestage transmis par la MME, détermine une MME cible pour le délestage, et transmet un identifiant de la MME cible à la MME ; la MME reçoit l'identifiant de la MME cible transmis par la station de base domestique, et exécute le délestage sur la MME cible d'après l'identifiant.
PCT/CN2016/089224 2015-10-16 2016-07-07 Station de base, entité de gestion de mobilité, procédé et système de délestage WO2017063402A1 (fr)

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CN201510673062.3 2015-10-16
CN201510673062.3A CN106604331A (zh) 2015-10-16 2015-10-16 基站、移动管理实体、负荷卸载方法及系统

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CN109429219B (zh) * 2017-07-20 2021-04-09 华为技术有限公司 切换方法、设备及系统
CN110876137A (zh) * 2018-09-03 2020-03-10 普天信息技术有限公司 轨道交通换线运营中车载终端的切换系统和方法

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CN101553017A (zh) * 2008-04-03 2009-10-07 华为技术有限公司 控制资源释放的方法、网元设备及网络系统
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CN102123464A (zh) * 2011-01-21 2011-07-13 大唐移动通信设备有限公司 一种选择mme的方法及装置

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CN101553017A (zh) * 2008-04-03 2009-10-07 华为技术有限公司 控制资源释放的方法、网元设备及网络系统
CN101583155A (zh) * 2008-05-16 2009-11-18 大唐移动通信设备有限公司 移动性管理实体上的负载迁移方法及通信设备
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