WO2013010415A1 - 一种实现ip地址属性通知的方法、系统和sgw - Google Patents

一种实现ip地址属性通知的方法、系统和sgw Download PDF

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Publication number
WO2013010415A1
WO2013010415A1 PCT/CN2012/076824 CN2012076824W WO2013010415A1 WO 2013010415 A1 WO2013010415 A1 WO 2013010415A1 CN 2012076824 W CN2012076824 W CN 2012076824W WO 2013010415 A1 WO2013010415 A1 WO 2013010415A1
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Prior art keywords
sgw
address
address attribute
new
pgw
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PCT/CN2012/076824
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English (en)
French (fr)
Inventor
卢飞
陈刚
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中兴通讯股份有限公司
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Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=47535430&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2013010415(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
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
Priority to ES12814512.5T priority Critical patent/ES2685674T3/es
Priority to US14/233,808 priority patent/US9713042B2/en
Priority to EP12814512.5A priority patent/EP2736282B1/en
Publication of WO2013010415A1 publication Critical patent/WO2013010415A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W8/00Network data management
    • H04W8/26Network addressing or numbering for mobility support
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/02Details
    • H04L12/14Charging, metering or billing arrangements for data wireline or wireless communications
    • H04L12/1403Architecture for metering, charging or billing
    • H04L12/1407Policy-and-charging control [PCC] architecture
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00Network arrangements, protocols or services for addressing or naming
    • H04L61/50Address allocation
    • H04L61/5076Update or notification mechanisms, e.g. DynDNS
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M15/00Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/83Notification aspects
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M15/00Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/83Notification aspects
    • H04M15/84Types of notifications
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M15/00Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/83Notification aspects
    • H04M15/85Notification aspects characterised by the type of condition triggering a notification
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0011Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0019Control or signalling for completing the hand-off for data sessions of end-to-end connection adapted for mobile IP [MIP]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/12Reselecting a serving backbone network switching or routing node
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/24Accounting or billing
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/02Details
    • H04L12/14Charging, metering or billing arrangements for data wireline or wireless communications
    • H04L12/1425Charging, metering or billing arrangements for data wireline or wireless communications involving dedicated fields in the data packet for billing purposes
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00Network arrangements, protocols or services for addressing or naming
    • H04L61/50Address allocation
    • H04L61/5007Internet protocol [IP] addresses
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0011Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W88/00Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/16Gateway arrangements

Definitions

  • the present invention relates to the field of communications, and in particular, to a method, a system, and a Serving Gateway (SGW) for implementing IP address attribute notification.
  • SGW Serving Gateway
  • SAE System Architecture Evolution
  • the current SAE architecture is shown in Figure 1, which includes the following network elements:
  • Evolved RAN Provides higher uplink/downlink rates, lower transmission delays, and more reliable wireless transmission.
  • the network element included in the E-RAN is an eNodeB (Evolved NodeB), which is used to provide radio resources for user access.
  • Packet Data Network A network that provides services to users.
  • E-Packet Core which provides lower latency and allows for more Line access system access. It contains the following network elements:
  • Mobility Management Entity A control plane function entity that temporarily stores user data. It is responsible for managing and storing the context of User Equipment (UE) (such as UE/user ID, mobility management status, user). Security parameters, etc.), assigning a temporary identifier to the user, when the UE is camped in the tracking area or the network, is responsible for authenticating the user; processing all non-access stratum messages between the MME and the UE; triggering the search in the SAE call.
  • UE User Equipment
  • the MME is the mobility management unit of the S AE system. In the UMTS system, the mobility management unit is an SGSN (Serving GPRS Support Node).
  • the SGW is a user plane entity, which is responsible for user plane data routing processing, and terminates downlink data of UEs in an idle (ECMJDLE) state. Manage and store the SAE bearer context of the UE, such as IP bearer service parameters and network internal routing information.
  • the SGW is an anchor point of the internal user plane of the 3GPP system, and a user can only have one SGW at a time;
  • the PDN Gateway which is responsible for the UE accessing the PDN, assigns the user IP address, and is the mobility anchor of the 3GPP and non-3GPP access systems.
  • the PGW functions include policy implementation and charging support. . Users can access multiple PGWs at the same time.
  • the PCEF Policy and Charging Enforcement Function is also located in the PGW.
  • the Policy and Charging Rules Function (PCRF) is responsible for providing policy control and charging rules to the PCEF.
  • the Home Subscriber Server permanently stores the user subscription data.
  • the content stored in the HSS includes the IMSI (International Mobile Subscriber Identification) of the UE and the IP address of the PGW.
  • IMSI International Mobile Subscriber Identification
  • the Charging Gateway Function (CGF) is responsible for collecting user billing data.
  • the SGW and the PGW may be one.
  • EPC system user plane network element includes SGW And PGW.
  • a network may allocate a dynamic Internet Protocol (IP) to a UE, or may assign a static IP address to a UE.
  • IP Internet Protocol
  • the UE attaches and assigns a static IP address during the attach process, including the following steps:
  • Step 201 The UE sends an attach request message to the eNodeB, where the message carries parameters such as IMSI and UE network capability.
  • Step 202 The eNodeB selects an MME for the UE, and forwards an attach request message to the MME.
  • Step 203 The MME sends a location update request message to the HSS, where the message carries the update type and the MME address.
  • Step 204 The HSS returns a location update response message to the MME, where the message carries user data, where the user data includes an Access Point Name (APN), a default Quality of Service (QoS), and a corresponding static IP address.
  • APN Access Point Name
  • QoS Quality of Service
  • Step 205 The MME selects an SGW for the UE according to the location information of the UE, and sends a setup session request message to the selected SGW, where the message carries the IP address of the MME and the Tunnel Endpoint Identifier (TEID), and the control plane IP address of the PGW. , default bearer QoS,
  • Step 206 The SGW sends a setup session request message to the PGW, where the message carries the control plane IP address and TEID of the SGW, the user plane IP address and TEID of the SGW, the control plane IP address of the PGW, the default bearer QoS, the EPS bearer ID, and the static IP. Address, etc.
  • Step 207 The PGW returns a session establishment response message to the SGW, where the message carries the IP address and TEID of the PGW, the user plane IP address and the TEID of the PGW, the QoS, and the IP address.
  • Step 208 The SGW returns a session establishment response message to the MME, where the message carries the control plane IP address and TEID of the PGW, the user plane IP address and TEID of the PGW, the user plane IP address and TEID of the SGW, the bearer QoS, and the user IP address.
  • GUI Globally Unique Temporary Identity
  • TAI Tracking Area Identity
  • Step 210 the eNodeB sends an RRC (Radio Resource Connection) reconfiguration message to the UE, where the message carries the EPS radio bearer ID, and sends an attach accept message to the UE;
  • RRC Radio Resource Connection
  • Step 211 The UE sends an RRC reconfiguration complete message to the eNodeB.
  • Step 212 The eNodeB sends an initial context setup response message to the MME, where the message carries the eNodeB user plane IP address and the TEID.
  • Step 213 The UE sends a direct transmission message to the eNodeB, where the message carries an attach complete message.
  • Step 214 The eNodeB sends an attach complete message to the MME.
  • Step 215 The MME sends a modify bearer request message to the SGW, where the message carries the eNodeB user plane IP address, the TEID, and the EPS bearer ID.
  • Step 216 The SGW returns a bearer response message to the MME.
  • the main purpose of the present invention is to provide a method, system, and SGW for implementing IP address attribute notification, so as to ensure that the new SGW can know the IP address attribute of the UE in time when the SGW changes.
  • a method for implementing an Internet Protocol IP address attribute notification comprising: When the serving gateway SGW changes, the IP address attribute of the user equipment UE is notified to the new SGW.
  • the method for notifying the new SGW is at least one of the following:
  • the mobility management unit transmits the IP address attribute of the UE to the SGW in the establishment session request message;
  • the method further includes: the mobility management unit acquiring the IP address attribute by using at least one of an attach, a UE request packet data network PDN connection establishment process, and a PDP context activation process;
  • the PGW passes the IP address attribute in the modify bearer response message.
  • the method further includes: the PGW carrying the IP address attribute in the setup session response message to the mobility management unit by using the SGW; and transmitting the UE to the new mobility management unit when the UE moves to the new mobility management unit;
  • the method further includes: in a process of including at least one of an attach procedure, a UE requesting a PDN connection establishment process, and a PDP context activation process, the PGW stores the IP address attribute in a PGW context.
  • the IP address attribute includes whether the IP address of the UE is a dynamic IP address or a static IP address.
  • the mobility management unit is a mobility management entity MME or a serving GPRS support node SGSN.
  • the method further includes:
  • the charging gateway function entity CGF connected to the SGW performs charging for the UE according to the IP address attribute.
  • a system for implementing IP address attribute notification the system includes a service gateway confirmation unit and an IP address attribute notification unit;
  • the service gateway confirming unit is configured to confirm that the service gateway changes, and notify the IP address attribute notification unit to the situation;
  • the IP address attribute notification unit is configured to notify the new serving gateway of the IP address attribute of the UE according to the notification of the serving gateway confirmation unit.
  • the IP address attribute notification unit is configured to apply at least one of the following manners when notifying the new SGW:
  • Manner 1 The mobile management unit controls the IP address attribute of the UE to be sent to the SGW in the establishment session request message;
  • the mobility management unit is further configured to: obtain the IP address attribute by using at least one of an attach, a UE requesting a PDN connection establishment process, and a PDP context activation process; The IP address attribute is passed in the response message.
  • the PGW is further configured to carry the IP address attribute in the setup session response message to the mobility management unit by using the SGW; when the UE moves to the new mobility management unit coverage area, the new mobility management unit;
  • the PGW is further configured to store the IP address attribute in the PGW context in a process including at least one of an attach procedure, a UE requesting a PDN connection establishment process, and a PDP context activation process.
  • the system further includes a CGF connected to the SGW, configured to perform charging for the UE according to the IP address attribute.
  • the IP address attribute includes the IP address of the UE being a dynamic IP address or a static IP address. address.
  • the mobility management unit is an MME or an SGSN.
  • An SGW configured to receive an IP address attribute of the UE
  • the SGW is a new SGW after the UE changes the SGW.
  • the IP address attribute is sent by the IP address attribute notification unit.
  • the IP address attribute notification unit is configured to apply at least one of the following manners when notifying the new SGW:
  • Manner 1 The mobile management unit controls the IP address attribute of the UE to be sent to the SGW in the establishment session request message;
  • the mobility management unit is further configured to: obtain the IP address attribute by using at least one of an attach, a UE requesting a PDN connection establishment process, and a PDP context activation process; The IP address attribute is passed in the response message.
  • the PGW is further configured to carry the IP address attribute in the setup session response message to the mobility management unit by using the SGW; when the UE moves to the new mobility management unit coverage area, the new mobility management unit;
  • the PGW is further configured to store the IP address attribute in the PGW context in a process including at least one of an attach procedure, a UE requesting a PDN connection establishment process, and a PDP context activation process.
  • the SGW is connected to the CGF, and the CGF is configured to perform charging for the UE according to the IP address attribute.
  • the IP address attribute includes whether the IP address of the UE is a dynamic IP address or a static IP address.
  • the mobility management unit is an MME or an SGSN.
  • the technology for implementing the IP address attribute notification can ensure that the new SGW can know the IP address attribute of the UE in time when the SGW changes. Therefore, the CGF connected to the SGW can perform accurate charging for the UE according to the IP address attribute.
  • FIG. 1 is a schematic diagram of a structure of an evolved packet network system of the prior art
  • FIG. 3 is a flowchart of implementing an IP address attribute notification according to an embodiment of the present invention.
  • FIG. 5 is a flowchart of obtaining an IP address attribute by an SGW in an attach process according to Embodiment 1 of the present invention
  • TAU tracking area update
  • FIG. 7 is a flowchart of a UE switching and moving to a new MME according to Embodiment 1 of the present invention
  • FIG. 8 is a flowchart of a UE moving to a new MME and generating a TAU according to Embodiment 2 of the present invention
  • FIG. 10 is a schematic flowchart of implementing an IP address attribute notification according to an embodiment of the present invention
  • FIG. 11 is a system diagram of implementing IP address attribute notification according to an embodiment of the present invention. detailed description
  • the mobility management unit may forward the IP address attribute of the UE to the SGW in the setup session request message, so that the CGF connected to the SGW can perform accurate charging for the UE according to the IP address attribute.
  • the mobility management unit may obtain an IP address attribute in a process such as attaching, requesting a PDN connection establishment process, and a PDP context activation process.
  • the PGW may carry the IP address attribute through the SGW to establish a session response cancellation. Transfer to the mobility management unit; when the UE moves to the new mobility management unit coverage area, the original migration unit; if the new mobility management unit decides that the SGW needs to change, the new management unit may send a setup session request message to the new SGW. Carrying the IP address attribute.
  • the PGW can also transfer the IP address attribute of the UE to the new SGW.
  • the PGW may deliver the IP address attribute in the modify bearer response message; and, in the process of attaching, the UE requesting the PDN connection establishment process, the PDP context activation process, etc., the PGW may store the IP address attribute in the In the context of the PGW.
  • FIG. 3 is a flowchart of implementing an IP address attribute notification according to an embodiment of the present invention, where the process includes the following steps:
  • Step 301 During the attach, the UE requests the PDN establishment process, or the PDP context establishment process, the PGW notifies the mobility management unit of the IP address attribute in the establishment session response message.
  • the IP address attribute may include a static IP address and a dynamic IP address, which may be identified by a tag.
  • the tag may be represented by a separate information element (IE), or may be indicated by a "1" in the IE. IP address, using "0" to indicate a static IP address;
  • the mobility management unit stores the received IP address attribute and passes the IP address attribute to the new mobility management unit during TAU/Routing Area Update (RAU) or handover.
  • RAU Radio Access Area Update
  • FIG. 4 is a flowchart of implementing IP address attribute notification according to Embodiment 2 of the present invention, where the process includes the following steps:
  • Step 401 in the attach, the UE requests the PDN establishment process or the PDP context establishment process
  • the PGW notifies the SGW of the IP address attribute in the establishment session response message, and the IP address attribute exists in the PGW context;
  • Step 402 In the process of the TAU/RAU or the handover, if the SGW changes, the PGW carries the IP address attribute in the update bearer response message sent to the new SGW.
  • FIG. 5 is a flowchart of obtaining an IP address attribute by an SGW in an attach process according to Embodiment 1 of the present invention, where the process includes the following steps:
  • Step 501 The UE sends an attach request message to the eNodeB, where the message carries parameters such as IMSI and UE network capability.
  • Step 502 The eNodeB selects an MME for the UE, and forwards an attach request message to the MME.
  • Step 503 The MME sends a location update request message to the HSS, where the message carries the update type and the MME address.
  • Step 504 The HSS returns a location update response message to the MME, where the message carries user data, where the user data includes an APN, a default bearer QoS, and a corresponding static IP address.
  • Step 505 The MME selects an SGW for the UE according to the location information of the UE, and sends a setup session request message to the selected SGW, where the message carries the IP address and TEID of the MME, the control plane IP address of the PGW, the default bearer QoS, and the EPS bearer ID. If the corresponding static IP address is obtained in step 504, the static IP address may also be carried in the setup session request message in this step.
  • Step 506 The SGW sends a setup session request message to the PGW, where the message carries the control plane IP address and TEID of the SGW, the user plane IP address and TEID of the SGW, the control plane IP address of the PGW, the default bearer QoS, and the EPS bearer ID. If the static IP address is obtained in the step 504, the static IP address may be carried in the setup session request message in this step.
  • Step 507 The PGW returns a session establishment response message to the SGW, where the message carries the control plane IP address and TEID of the PGW, the user plane IP address and TEID of the PGW, the QoS, and the IP address.
  • the address; the IP address attribute is also required to be carried in the message; the IP address attribute may include a static IP address and a dynamic IP address, which may be identified by a tag, which may be represented by a separate IE, or may be "1" in IE.
  • Step 508 the SGW returns a session establishment response message to the MME, the message carrying the control plane IP address and TEID of the PGW, the user plane IP address and the TEID of the PGW, The user plane IP address and TEID of the SGW, the bearer QoS, and the user IP address; etc.; the IP address attribute also needs to be carried in the message;
  • Step 509 The MME sends an initial context setup request message to the eNodeB, where the message carries the SGW user plane IP address and TEID, the bearer QoS and the EPS bearer ID, and the message further includes an attach accept message, where the attach accept message carries the APN, the user IP address, GUTI, TAI list, etc.;
  • Step 510 The eNodeB sends an RRC reconfiguration message to the UE, where the message carries an EPS radio bearer ID, and sends an attach accept message to the UE.
  • Step 511 The UE sends an RRC reconfiguration complete message to the eNodeB.
  • Step 512 The eNodeB sends an initial context setup response message to the MME, where the message carries the eNodeB user plane IP address and the TEID.
  • Step 513 The UE sends a direct transmission message to the eNodeB, where the message carries an attach complete message.
  • Step 514 The eNodeB sends an attach complete message to the MME.
  • Step 515 The MME sends a modify bearer request message to the SGW, where the message carries the eNodeB user plane IP address, the TEID, and the EPS bearer ID.
  • Step 516 The SGW returns a bearer response message to the MME.
  • This embodiment is described by taking the attaching process as an example.
  • the method for the UE to request the PDN connection establishment process or the PDP context establishment process is similar to that of this embodiment, and details are not described herein again.
  • FIG. 6 is a flowchart of a tracking area update (TAU) when a UE moves to a new MME according to Embodiment 1 of the present invention, where the process includes the following steps: Step 601: The UE moves to the E-UTRAN coverage area of the MME, and the UE needs to carry its own capability information in addition to the GUTI allocated by the UE under the original MME in the tracking area update request message sent to the MME.
  • TAU tracking area update
  • Step 602 The new MME finds the original MME according to the received GUTI identifier, and sends context request signaling to the original MME to perform a context acquisition process.
  • Step 603 The original MME sends the mobility management information and the information of the user to the new MME, and carries the IP address attribute in the returned context response message.
  • Step 604 the new MME returns a context confirmation message to the original MME.
  • Step 605 The new MME initiates a session establishment request to the new SGW, where the request message carries the General Packet Radio Service Tunneling Protocol-Control Plane (GTP-C) tunnel endpoint identifier and the destination GTP-C.
  • GTP-C General Packet Radio Service Tunneling Protocol-Control Plane
  • the tunnel identifier, the SGW control plane address, and the TEID, and the location information of the UE, the message also needs to carry an IP address attribute;
  • Step 606 The SGW sends an update bearer request to the PGW, where the request message carries the location information of the UE.
  • Step 607 The PGW updates its own context and returns an update bearer response message to the SGW.
  • Step 608 The SGW returns a session establishment response to the new MME, the destination GTP-C tunnel identifier specified by the SGW, its own address, and the PGW address and tunnel information.
  • the MME is sent to the MME;
  • Step 609 the new MME notifies the change of the HSS location by using the location update message;
  • Step 611 The original MME returns a location cancellation response to the HSS.
  • Step 612 the HSS confirms the location update of the new MME, and transmits the user subscription data to the new MME.
  • Step 613 If the new MME confirms that the UE is valid in the current tracking area, send a tracking area update accept message to the UE.
  • Step 614 If the new MME allocates a new GUTI identifier to the UE through the TAU procedure, the UE returns a trace area update complete message to confirm to the MME.
  • Step 615 The original MME sends a release session request message to the original SGW, and notifies the SGW to delete the context of the user.
  • Step 616 The original SGW returns a release session response message to the original MME.
  • This embodiment is described by taking the UE to the new MME coverage area as an example.
  • the processing method of the UE moving to the new SGSN is similar to that in this embodiment, and details are not described herein again.
  • FIG. 7 is a flowchart of a UE switching and moving to a new MME according to Embodiment 1 of the present invention, where the process includes the following steps:
  • Step 701 The original eNodeB decides to initiate a handover between the eNodeB and the core network node to the new eNodeB.
  • Step 702 The original eNodeB sends a handover request message to the original MME.
  • Step 703 The original MME selects a new MME according to the MME selection function, and sends a node re-allocation request message to the new MME, where the message includes the address of the PGW and the uplink TEID, the address of the SGW, and the uplink TEID, and carries the IP address attribute in the message. ;
  • the IP address attribute can include a static IP address and a dynamic IP address, which can be identified by a tag.
  • the tag can be represented by a separate IE, or a "1" in IE can be used to indicate a dynamic IP address, and a "0" is used to indicate Static IP address.
  • Step 704 The new MME sends a session establishment request message to the SGW, where the request message carries the GTP-C tunnel identifier and the IP address of the PGW, the bearer QoS, and the like; the message also needs to carry the IP address attribute.
  • Step 705 The SGW returns a session establishment response message to the MME, where the response message carries the GTP-C tunnel identifier of the SGW and its own address.
  • Step 706 The new MME sends a handover request message to the new eNodeB to request to establish a UE context in the new eNodeB.
  • Step 707 The new eNodeB sends a handover request acknowledgement message to the new MME.
  • Step 708 The new MME sends a node re-allocation response message to the original MME.
  • Step 709 The original MME sends a handover indication message to the original eNodeB.
  • Step 710 The original eNodeB forwards the handover indication message to the UE.
  • Step 711 After performing cell synchronization with the new eNodeB, the UE sends a handover confirmation message to the new eNodeB.
  • Step 712 The new eNodeB sends a handover notification message to the new MME.
  • Step 713 The new MME sends a message that the node re-allocation is completed to the original MME.
  • Step 714 The original MME returns a confirmation message that the node re-allocation is completed to the new MME.
  • Step 715 The new MME initiates an update bearer request to the SGW, where the request message carries the user plane tunnel identifier and the IP address of the new eNodeB.
  • Step 716 The SGW sends an update bearer request to the PGW, and sends the SGW address information, the tunnel identifier information, and the location information of the UE to the PGW.
  • Step 717 The PGW updates its own context, and returns an update bearer response to the SGW.
  • Step 718 the SGW returns an update bearer response message to the new MME.
  • the UE is moved to the new MME coverage area as an example.
  • the processing method of the UE moving to the new SGSN is similar to that in this embodiment, and details are not described herein again.
  • FIG. 8 is a flowchart of a UE moving to a new MME and generating a TAU according to Embodiment 2 of the present invention, where the process includes the following steps:
  • Step 801 The UE moves to the E-UTRAN coverage area of the MME, and the UE needs to carry its own capability information in addition to the GUTI allocated by the UE under the original MME in the tracking area update request message sent to the MME.
  • Step 802 The new MME finds the original MME according to the received GUTI identifier, and sends context request signaling to the original MME to perform a context acquisition process.
  • Step 803 The original MME sends the mobility management and the bearer information of the user to the new MME.
  • Step 804 The new MME returns a context confirmation message to the original MME.
  • Step 805 The new MME initiates a session establishment request to the new SGW, where the request message carries the source GTP-C tunnel identifier and the destination GTP-C tunnel identifier, the SGW control plane address, the TEID, and the location information of the UE.
  • Step 806 The SGW sends an update bearer request to the PGW, where the request message carries the location information of the UE.
  • Step 807 The PGW updates its own context and returns an update bearer response message to the SGW, where the message carries an IP address attribute.
  • Step 808 The SGW returns a session establishment response to the new MME, and sends the destination GTP-C tunnel identifier, the address of the PGW, and the address and tunnel information of the PGW to the MME.
  • Step 809 The new MME notifies the HSS location by using the location update message. Change 810, the HSS sends location cancellation signaling to the original MME;
  • Step 811 The original MME returns a location cancellation response to the HSS.
  • Step 812 the HSS confirms the location update of the new MME, and transmits the user subscription data to the new MME.
  • Step 813 If the new MME confirms that the UE is valid in the current tracking area, send a tracking area update accept message to the UE.
  • Step 814 If the new MME allocates a new GUTI identifier to the UE through the TAU procedure, the UE returns a trace area update complete message to confirm to the MME.
  • Step 815 The original MME sends a release session request message to the original SGW, and notifies the SGW to delete the context of the user.
  • Step 816 The original SGW returns a release session response message to the original MME.
  • FIG. 9 is a flowchart of a UE switching and moving to a new MME according to Embodiment 2 of the present invention, where the process includes the following steps:
  • Step 901 The original eNodeB decides to initiate a handover between the eNodeB and the core network node to the new eNodeB.
  • Step 902 The original eNodeB sends a handover request message to the original MME.
  • Step 903 The original MME selects a new MME according to the MME selection function, and sends a node re-allocation request message to the new MME, where the message includes the address of the PGW, the uplink TEID, the address of the SGW, and the uplink TEID.
  • Step 904 The new MME sends a session establishment request message to the SGW, where the request message carries the GTP-C tunnel identifier and the IP address of the PGW, the bearer QoS, and the like; the message also needs to carry the IP address attribute;
  • Step 905 The SGW returns a session establishment response message to the MME, where the response message carries the GTP-C tunnel identifier of the SGW and its own address.
  • Step 906 The new MME sends a handover request message to the new eNodeB to request to establish a UE context in the new eNodeB.
  • Step 907 The new eNodeB sends a handover request acknowledgement message to the new MME.
  • Step 908 The new MME sends a node re-allocation response message to the original MME.
  • Step 909 The original MME sends a handover indication message to the original eNodeB.
  • Step 910 The original eNodeB forwards the handover indication message to the UE.
  • Step 911 After performing cell synchronization with the new eNodeB, the UE sends a handover confirmation message to the new eNodeB.
  • Step 912 The new eNodeB sends a handover notification message to the new MME.
  • Step 913 The new MME sends a message that the node re-allocation is completed to the original MME.
  • Step 914 The original MME returns a confirmation message that the node re-allocation is completed to the new MME.
  • Step 915 The new MME initiates an update bearer request to the SGW, and the request message carries a new message.
  • Step 916 The SGW sends an update bearer request to the PGW, and sends parameters such as address information, tunnel identifier information, and location information of the UE to the PGW.
  • Step 917 the PGW updates its own context, and returns an update bearer response message to the SGW.
  • the message carries an IP address attribute, and the IP address attribute may include a static IP address and a dynamic IP address, which may be identified by a mark, and the mark may be used separately.
  • IE indicates that you can also use "1," in IE to indicate a dynamic IP address, and "0" to indicate a static IP address.
  • Step 918 The SGW returns an update bearer response message to the new MME.
  • the UE is moved to the new MME coverage area as an example.
  • the processing method of the UE moving to the new SGSN is similar to that in this embodiment, and details are not described herein again.
  • the CGF connected to the new SGW can perform accurate charging for the UE according to the IP address attribute.
  • the operation of the IP address attribute notification in the present invention may represent the process shown in FIG. 10, and the process includes the following steps:
  • Step 1001 Confirm that the service gateway has changed.
  • Step 1002 Notify the new service gateway of the UE's IP address attribute.
  • FIG. 11 is a system diagram for implementing IP address attribute notification according to an embodiment of the present invention, where the system includes a connected service gateway confirmation unit and an IP address attribute notification unit.
  • the service gateway confirming unit can confirm that the service gateway changes, and notifies the IP address attribute notification unit of the situation, and the IP address attribute notification unit notifies the new service gateway of the IP address attribute of the UE.
  • the IP address attribute notification unit is configured to apply at least one of the following manners when notifying the new SGW:
  • Manner 1 The mobile management unit controls the IP address of the UE in the establishment session request message. Passing to the SGW;
  • the mobility management unit is further configured to: obtain the IP address attribute by using at least one of an attaching, a UE requesting a PDN connection establishing process, and a PDP context activating process; and for the second mode, the PGW is used to modify the bearer response message. Pass the IP address attribute in .
  • the PGW is further configured to carry the IP address attribute in the setup session response message to the mobility management unit by using the SGW; when the UE moves to the new mobility management unit coverage area, the new mobility management unit;
  • the PGW is further configured to store the IP address attribute in the PGW context in a process including at least one of an attach procedure, a UE requesting a PDN connection establishment process, and a PDP context activation process.
  • the method may further include: a CGF connected to the SGW, configured to perform charging for the UE according to the IP address attribute;
  • the IP address attribute includes whether the IP address of the UE is a dynamic IP address or a static IP address.
  • the mobility management unit is an MME or an SGSN.
  • the SGW in the embodiment of the present invention can receive the IP address attribute of the UE; the SGW is a new SGW after the UE changes the SGW.
  • the IP address attribute is sent by the IP address attribute notification unit; the IP address attribute notification unit is configured to apply at least one of the following manners when notifying the new SGW:
  • Manner 1 The mobile management unit controls the IP address attribute of the UE to be sent to the SGW in the establishment session request message;
  • the control PGW transmits the IP address attribute of the UE to the new SGW.
  • the mobility management unit is further configured to: obtain the IP address attribute by using at least one of an attach, a UE requesting a PDN connection establishment process, and a PDP context activation process; The IP address attribute is passed in the response message.
  • the mode 1 is used by the PGW to carry the IP address attribute in the setup session response message to the mobility management unit by using the SGW; when the UE moves to the new mobility management unit coverage area new mobility management unit;
  • the PGW is further configured to store the IP address attribute in the PGW context in a process including at least one of an attach procedure, a UE requesting a PDN connection establishment process, and a PDP context activation process.
  • the SGW is connected to the CGF, and the CGF is configured to perform charging for the UE according to the IP address attribute.
  • the IP address attribute includes whether the IP address of the UE is a dynamic IP address or a static IP address.
  • the mobility management unit is an MME or an SGSN.
  • the technology for implementing IP address attribute notification in the present invention can ensure that when the SGW changes, the new SGW can know the IP address attribute of the UE in time, and thus the CGF connected to the SGW can be seen.
  • the UE can be accurately charged according to the IP address attribute.

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Abstract

本发明公开了一种实现IP地址属性通知的方法、系统和SGW,均可在服务网关发生变化时,将用户设备的IP地址属性通知给新服务网关。本发明实现IP地址属性通知的技术,能够保证当服务网关发生变化时,新服务网关能够及时获知用户设备的IP地址属性,因而与服务网关相连接的计费网关功能实体能够根据所述IP地址属性为用户设备进行精确计费。

Description

一种实现 IP地址属性通知的方法、 系统和 SGW 技术领域
本发明涉及通信领域, 具体涉及一种实现 IP地址属性通知的方法、 系 统和服务网关 ( Serving Gateway, SGW )。 背景技术
随着 WiMax ( World Interoperability for Microwave Access , 全求 波接 入互通) 的异军突起, 第三代移动通信系统要保持其在移动通信领域的强 有力的竟争力, 必须提高其网络性能和降低网络建设及运营成本。 因此, 3GPP ( 3rd Generation Partnership Project, 第三代合作伙伴计划) 的标准化 工作组, 目前正致力于研究 PS Core ( Packet Switch Core, 包交换核心网) 和 UTRAN ( Universal Mobile Telecommunication System Radio Access Network, 全球移动通信系统无线接入网 )的演进, 这个研究的课题叫做系 统架构演进(System Architecture Evolution, SAE ), 目的是使得演进的分组 网 ( Evolved Packet Core , EPC )可提供更高的传输速率, 更短的传输延时, 优化分组 ,及支持 E-UTRAN ( Evolved UTRAN ,演进的 UTRAN )、 UTRAN、 WLAN ( Wireless Local Area Network, 无线局域网 )及其他非 3GPP的接入 网络之间的移动性管理。
目前 SAE的架构如图 1所示, 其中包含了如下网元:
演进的无线接入网 (Evolved RAN, E-RAN ): 可以提供更高的上 /下行 速率、 更低的传输延迟和更加可靠的无线传输。 E-RAN 中包含的网元是 eNodeB ( Evolved NodeB , 演进节点 Β ), 用于为用户的接入提供无线资源。
分组数据网 (Packet Data Network, PDN ): 为用户提供业务的网络。 演进的分组网 ( E-Packet Core ), 提供了更低的延迟, 并允许更多的无 线接入系统接入。 其包含如下网元:
移动管理实体( Mobility Management Entity, MME ):控制面功能实体, 临时存储用户数据的服务器, 负责管理和存储用户设备 ( User Equipment, UE ) 的上下文(比如 UE/用户标识, 移动性管理状态, 用户安全参数等), 为用户分配临时标识, 当 UE驻扎在该跟踪区域或者该网络时, 负责对该用 户进行鉴权; 处理 MME和 UE之间的所有非接入层消息; 触发在 SAE的 寻呼。 MME是 S AE系统的移动管理单元。 在 UMTS系统中, 移动管理单 元是 SGSN ( Serving GPRS Support Node, 服务 GPRS支持节点)。
SGW 是用户面实体, 负责用户面数据路由处理, 终结处于空闲 ( ECMJDLE )状态的 UE的下行数据。管理和存储 UE的 SAE承载( bearer ) 上下文, 比如 IP承载业务参数和网络内部路由信息等。 SGW是 3GPP系统 内部用户面的锚点, 一个用户在一个时刻只能有一个 SGW;
分组数据网网关( PDN Gateway, PGW ), 负责 UE接入 PDN的网关, 分配用户 IP地址, 同时是 3GPP和非 3GPP接入系统的移动性锚点, PGW 的功能还包括策略实施、 计费支持。 用户在同一时刻能够接入多个 PGW。 PCEF( Policy and Charging Enforcement Function ,策略与计费实施功能实体) 也位于 PGW中。
策略与计费规则功能实体( Policy and Charging Rules Function, PCRF ) 负责向 PCEF提供策略控制与计费规则。
归属用户服务器( Home Subscriber Server, HSS )永久存储用户签约数 据, HSS 存储的内容包括 UE 的 IMSI ( International Mobile Subscriber Identification, 国际移动用户识别码 )、 PGW的 IP地址。
计费网关功能实体( Charging Gateway Function, CGF ), 负责收集用户 的计费数据。
在物理上, SGW和 PGW可能合一。 EPC系统用户面网元包括 SGW 和 PGW。
在 EPC系统中,网络可以为 UE分配动态因特网协议( Internet Protocol , IP ), 也可以为 UE分配静态 IP地址。 如图 2所示, UE附着并在附着过程 中分配静态 IP地址, 包括以下步驟:
步驟 201 , UE向 eNodeB发送附着请求消息, 消息中携带 IMSI、 UE 网络能力等参数;
步驟 202, eNodeB为 UE选择 MME, 并向 MME转发附着请求消息; 步驟 203 , MME向 HSS发送位置更新请求消息,消息中携带更新类型、 MME地址;
步驟 204, HSS向 MME返回位置更新响应消息,消息中携带用户数据, 用户数据中包括接入点名称( Access Point Name, APN )、 默认承载服务质 量( Quality of Service, QoS ) 以及对应的静态 IP地址;
步驟 205 , MME根据 UE的位置信息为 UE选择 SGW,并向选择的 SGW 发送建立会话请求消息, 消息中携带 MME 的 IP 地址和隧道端点标识 ( Tunnel Endpoint Identifier, TEID ), PGW的控制面 IP地址、默认承载 QoS、
EPS承载 ID、 静态 IP地址等;
步驟 206 , SGW向 PGW发送建立会话请求消息, 消息中携带 SGW的 控制面 IP地址和 TEID、 SGW的用户面 IP地址和 TEID、 PGW的控制面 IP 地址、 默认承载 QoS、 EPS承载 ID、 静态 IP地址等;
步驟 207 , PGW向 SGW返回建立会话响应消息, 消息中携带 PGW的 控制面 IP地址和 TEID、 PGW的用户面 IP地址和 TEID、 载 QoS以及 IP 地址;
步驟 208 , SGW向 MME返回建立会话响应消息, 消息中携带 PGW的 控制面 IP地址和 TEID、 PGW的用户面 IP地址和 TEID、 SGW的用户面 IP 地址和 TEID、 承载 QoS以及用户 IP地址等; 步驟 209, MME向 eNodeB发送初始上下文建立请求消息, 消息中携 带 SGW用户面 IP地址和 TEID、 承载 QoS和 EPS承载 ID , 消息中还包括 附着接受消息, 附着接受消息中携带 APN、 用户 IP地址、 全球唯一临时标 识 ( Globally Unique Temporary Identity, GUTI )、跟踪区标识 ( Tracking Area Identity, TAI ) 列表等;
步驟 210, eNodeB向 UE发送 RRC ( Radio Resource Connection, 无线 承载连接)重配置消息, 消息中携带 EPS无线承载 ID, 并将附着接受消息 发送至 UE;
步驟 211 , UE向 eNodeB发送 RRC重配置完成消息;
步驟 212, eNodeB向 MME发送初始上下文建立响应消息, 消息中携 带 eNodeB用户面 IP地址和 TEID;
步驟 213 , UE向 eNodeB发送直传消息, 消息中携带附着完成消息; 步驟 214, eNodeB向 MME发送附着完成消息;
步驟 215 , MME向 SGW发送修改承载请求消息, 消息中携带 eNodeB 用户面 IP地址和 TEID , EPS承载 ID;
步驟 216 , SGW向 MME会回修改承载响应消息。
由上述内容可见, 目前, 当 SGW发生变化时, 新 SGW无法及时获知 UE的 IP地址属性, 因此与 SGW连接的 CGF无法根据 IP地址属性为 UE 进行精确计费。 发明内容
有鉴于此, 本发明的主要目的在于提供一种实现 IP地址属性通知的方 法、 系统和 SGW, 以保证当 SGW发生变化时, 新 SGW能够及时获知 UE 的 IP地址属性。
为达到上述目的, 本发明的技术方案是这样实现的:
一种实现因特网协议 IP地址属性通知的方法, 该方法包括: 当服务网关 SGW发生变化时, 将用户设备 UE的 IP地址属性通知给 新 SGW。
其中, 通知所述新 SGW的方法为以下方式中至少之一:
方式一、 移动管理单元在建立会话请求消息中将 UE的 IP地址属性传 递至 SGW;
方式二、当 UE发生移动并且 SGW发生变化后,分组数据网网关 PGW 将 UE的 IP地址属性传递给新 SGW。
其中, 针对方式一, 所述方法还包括: 移动管理单元通过包括附着、 UE请求分组数据网 PDN连接建立过程、 PDP上下文激活过程中至少之一, 获取所述 IP地址属性;
针对方式二, PGW在修改承载响应消息中传递所述 IP地址属性。
其中, 针对方式一, 所述方法还包括: PGW通过 SGW将 IP地址属性 携带于建立会话响应消息中传递至移动管理单元;当 UE移动至新移动管理 传递至新移动管理单元;
针对方式二, 所述方法还包括: 在包括附着过程、 UE请求 PDN连接 建立过程、 PDP上下文激活过程中至少之一的处理过程中, PGW将所述 IP 地址属性存储在 PGW上下文中。
其中, 所述 IP地址属性包括 UE的 IP地址是动态 IP地址或是静态 IP 地址。
其中,所述移动管理单元为移动管理实体 MME或服务 GPRS支持节点 SGSN。
其中, 该方法还包括:
与所述 SGW连接的计费网关功能实体 CGF根据所述 IP地址属性为 UE进行计费。 一种实现 IP地址属性通知的系统 , 该系统包括服务网关确认单元、 IP 地址属性通知单元; 其中,
所述服务网关确认单元, 用于确认服务网关发生变化, 并将该情况通 知给 IP地址属性通知单元;
所述 IP地址属性通知单元, 用于根据所述服务网关确认单元的通知, 将 UE的 IP地址属性通知给新的服务网关。
其中, 所述 IP地址属性通知单元在通知所述新 SGW时, 用于应用以 下方式中至少之一:
方式一、 控制移动管理单元在建立会话请求消息中将 UE的 IP地址属 性传递至 SGW;
方式二、 当 UE发生移动并且 SGW发生变化后, 控制 PGW将 UE的 IP地址属性传递给新 SGW。
其中,针对方式一,移动管理单元还用于:通过包括附着、 UE请求 PDN 连接建立过程、 PDP上下文激活过程中至少之一, 获取所述 IP地址属性; 针对方式二, PGW用于在修改承载响应消息中传递所述 IP地址属性。 其中, 针对方式一, PGW还用于通过 SGW将 IP地址属性携带于建立 会话响应消息中传递至移动管理单元;当 UE移动至新移动管理单元覆盖区 新移动管理单元;
针对方式二, 在包括附着过程、 UE请求 PDN连接建立过程、 PDP上 下文激活过程中至少之一的处理过程中 , PGW还用于将所述 IP地址属性存 储在 PGW上下文中。
其中, 该系统还包括与所述 SGW连接的 CGF, 用于根据所述 IP地址 属性为 UE进行计费。
其中, 所述 IP地址属性包括 UE的 IP地址是动态 IP地址或是静态 IP 地址。
其中, 所述移动管理单元为 MME或 SGSN。
一种 SGW, 用于接收 UE的 IP地址属性;
所述 SGW为 UE发生 SGW变化后的新的 SGW。
其中, 所述 IP地址属性由 IP地址属性通知单元发送; 所述 IP地址属 性通知单元在通知所述新 SGW时, 用于应用以下方式中至少之一:
方式一、 控制移动管理单元在建立会话请求消息中将 UE的 IP地址属 性传递至 SGW;
方式二、 当 UE发生移动并且 SGW发生变化后, 控制 PGW将 UE的 IP地址属性传递给新 SGW。
其中,针对方式一,移动管理单元还用于:通过包括附着、 UE请求 PDN 连接建立过程、 PDP上下文激活过程中至少之一, 获取所述 IP地址属性; 针对方式二, PGW用于在修改承载响应消息中传递所述 IP地址属性。 其中, 针对方式一, PGW还用于通过 SGW将 IP地址属性携带于建立 会话响应消息中传递至移动管理单元;当 UE移动至新移动管理单元覆盖区 新移动管理单元;
针对方式二, 在包括附着过程、 UE请求 PDN连接建立过程、 PDP上 下文激活过程中至少之一的处理过程中 , PGW还用于将所述 IP地址属性存 储在 PGW上下文中。
其中, 所述 SGW与 CGF连接; 所述 CGF用于根据所述 IP地址属性 为 UE进行计费。
其中, 所述 IP地址属性包括 UE的 IP地址是动态 IP地址或是静态 IP 地址。
其中, 所述移动管理单元为 MME或 SGSN。 本发明实现 IP地址属性通知的技术, 能够保证当 SGW发生变化时, 新 SGW能够及时获知 UE的 IP地址属性, 因而与 SGW相连接的 CGF能 够根据所述 IP地址属性为 UE进行精确计费。 附图说明
图 1为现有技术的演进分组网络系统结构的示意图;
图 2为现有技术的静态 IP地址分配的信令流程图;
图 3为本发明实施例一实现 IP地址属性通知的流程图;
图 4为本发明实施例二实现 IP地址属性通知的流程图;
图 5为本发明实施例一中, SGW在附着过程中获取 IP地址属性的流程 图;
图 6为本发明实施例一中, UE移动至新 MME时发生跟踪区更新( TAU ) 的流程图;
图 7为本发明实施例一中, UE发生切换并移动至新 MME的流程图; 图 8为本发明实施例二中, UE移动至新 MME并发生 TAU的流程图; 图 9为本发明实施例二中, UE发生切换并移动至新 MME的流程图; 图 10为本发明实施例实现 IP地址属性通知的流程简图;
图 11为本发明实施例实现 IP地址属性通知的系统图。 具体实施方式
在实际应用时, 移动管理单元可以在建立会话请求消息中将 UE的 IP 地址属性传递至 SGW, 使得与 SGW连接的 CGF能够根据所述 IP地址属 性为 UE进行精确计费。
需要说明的是, 移动管理单元可以在附着、 UE请求 PDN连接建立过 程、 PDP上下文激活过程等处理过程中获取 IP地址属性;
进一步地, PGW可以通过 SGW将 IP地址属性携带于建立会话响应消 息中传递至移动管理单元; 当 UE移动至新移动管理单元覆盖区域时,原移 单元; 如果新移动管理单元决定 SGW需要发生变化, 那么新管理单元可以 在发送至新 SGW的建立会话请求消息中携带所述 IP地址属性。
另外, 当 UE发生移动并且 SGW发生变化后, PGW同样可以将 UE 的 IP地址属性传递给新 SGW。
需要说明的是, PGW可以在修改承载响应消息中传递所述 IP地址属 性; 并且, 在附着过程、 UE请求 PDN连接建立过程、 PDP上下文激活过 程等处理过程中, PGW可以将 IP地址属性存储在 PGW上下文中。
以下结合附图对本发明的优选实施例进行说明。 应当理解, 此处所描 述的优选实施例仅用于说明和解释本发明, 并不用于限定本发明。
参见图 3, 图 3为本发明实施例一实现 IP地址属性通知的流程图, 该 流程包括以下步驟:
步驟 301 , 在附着、 UE请求 PDN建立过程或者 PDP上下文建立过程 中, PGW在建立会话响应消息中将 IP地址属性通知到移动管理单元。所述 IP地址属性可以包括静态 IP地址和动态 IP地址, 可以采用标记进行标识, 该标记可以用单独的信息单元(Information Element, IE )来表示, 也可以 用 IE中的 "1 "来指示动态 IP地址, 用 "0"来表示静态 IP地址;
步驟 302, 移动管理单元存储收到的 IP地址属性, 并在 TAU/路由区更 新 (RAU )或者切换的过程中将所述 IP地址属性传递至新移动管理单元。 这样, 当新移动管理单元决定 SGW改变时, 需要在新移动管理单元发向新 SGW的建立会话请求消息中携带所述 IP地址属性。
参见图 4, 图 4为本发明实施例二实现 IP地址属性通知的流程图, 该 流程包括以下步驟:
步驟 401 , 在附着、 UE请求 PDN建立过程或者 PDP上下文建立过程 中, PGW在建立会话响应消息中将 IP地址属性通知到 SGW, 并将所述 IP 地址属性存在 PGW上下文中;
步驟 402,在 TAU/RAU或者切换的过程中 ,如果 SGW发生改变, PGW 在发送至新 SGW的更新承载响应消息中携带所述 IP地址属性。
参见图 5, 图 5为本发明实施例一中, SGW在附着过程中获取 IP地址 属性的流程图, 该流程包括以下步驟:
步驟 501 , UE向 eNodeB发送附着请求消息, 消息中携带 IMSI、 UE 网络能力等参数;
步驟 502, eNodeB为 UE选择 MME, 并向 MME转发附着请求消息; 步驟 503, MME向 HSS发送位置更新请求消息,消息中携带更新类型、 MME地址;
步驟 504, HSS向 MME返回位置更新响应消息,消息中携带用户数据, 用户数据中包括 APN、 默认承载 QoS以及对应的静态 IP地址;
步驟 505 , MME根据 UE的位置信息为 UE选择 SGW,并向选择的 SGW 发送建立会话请求消息 , 消息中携带 MME的 IP地址和 TEID、 PGW的控 制面 IP地址、 默认承载 QoS、 EPS承载 ID; 如果在步驟 504中获取了对应 的静态 IP地址, 那么也可以在本步驟中的建立会话请求消息中携带所述静 态 IP地址;
步驟 506, SGW向 PGW发送建立会话请求消息, 消息中携带 SGW的 控制面 IP地址和 TEID、 SGW的用户面 IP地址和 TEID、 PGW的控制面 IP 地址、 默认承载 QoS、 EPS承载 ID; 如果在步驟 504中获取了对应的静态 IP地址, 那么也可以在本步驟中的建立会话请求消息中携带所述静态 IP地 址;
步驟 507, PGW向 SGW返回建立会话响应消息, 消息中携带 PGW的 控制面 IP地址和 TEID、 PGW的用户面 IP地址和 TEID、 载 QoS以及 IP 地址; 在该消息中还需要携带 IP地址属性; IP地址属性可以包括静态 IP 地址和动态 IP地址,可以采用标记进行标识,该标记可以用单独的 IE来表 示, 也可以用 IE中的 "1"来指示动态 IP地址, 用 "0"来表示静态 IP地址; 步驟 508 , SGW向 MME返回建立会话响应消息, 消息中携带 PGW的 控制面 IP地址和 TEID、 PGW的用户面 IP地址和 TEID、 SGW的用户面 IP 地址和 TEID、 承载 QoS以及用户 IP地址等; 在该消息中还需要携带 IP地 址属性;
步驟 509, MME向 eNodeB发送初始上下文建立请求消息, 消息中携 带 SGW用户面 IP地址和 TEID、 承载 QoS和 EPS承载 ID, 消息中还包括 附着接受消息, 附着接受消息中携带 APN、 用户 IP地址、 GUTI、 TAI列表 等;
步驟 510, eNodeB向 UE发送 RRC重配置消息, 消息中携带 EPS无线 承载 ID, 并将附着接受消息发送至 UE;
步驟 511 , UE向 eNodeB发送 RRC重配置完成消息;
步驟 512, eNodeB向 MME发送初始上下文建立响应消息, 消息中携 带 eNodeB用户面 IP地址和 TEID;
步驟 513 , UE向 eNodeB发送直传消息, 消息中携带附着完成消息; 步驟 514, eNodeB向 MME发送附着完成消息;
步驟 515 , MME向 SGW发送修改承载请求消息, 消息中携带 eNodeB 用户面 IP地址和 TEID、 EPS承载 ID;
步驟 516, SGW向 MME会回修改承载响应消息。
本实施例是以附着过程为例说明的; UE请求 PDN连接建立过程或者 PDP上下文建立过程的处理方法与本实施例类似, 在此不再赘述。
参见图 6, 图 6为本发明实施例一中, UE移动至新 MME时发生跟踪 区更新 ( TAU ) 的流程图, 该流程包括以下步驟: 步驟 601 , UE移动到 MME下的 E-UTRAN覆盖区, 在向 MME发送 的跟踪区更新请求消息中除了携带 UE在原 MME下分配的 GUTI, UE还 需要携带自身的能力信息;
步驟 602, 新 MME根据收到的 GUTI标识找到原 MME, 向原 MME 发送上下文请求信令以进行上下文获取过程;
步驟 603, 原 MME将用户的移动管理和 载信息发送给新 MME, 并 在返回的上下文响应消息中携带 IP地址属性;
步驟 604, 新 MME向原 MME回复上下文确认消息;
步驟 605 , 新 MME向新 SGW发起会话建立请求, 请求消息中携带源 控制面的通用数据无线服务隧道协议 ( General Packet Radio Service Tunnelling Protocol-Control Plane, GTP-C ) 隧道端点标识和目的 GTP-C隧 道标识、 SGW控制面地址和 TEID、 UE的位置信息, 该消息还需要携带 IP 地址属性;
步驟 606, SGW向 PGW发送更新承载请求,请求消息中携带 UE的位 置信息;
步驟 607, PGW更新自身的上下文并向 SGW返回更新承载响应消息; 步驟 608, SGW向新 MME返回会话建立响应, 将 SGW指定的目的 GTP-C隧道标识、 自身的地址以及 PGW的地址和隧道信息等带给 MME; 步驟 609 , 新 MME通过位置更新消息通知 HSS位置的改变; 步驟 610, HSS向原 MME发送位置取消信令;
步驟 611 , 原 MME向 HSS返回位置取消响应;
步驟 612, HSS对新 MME的位置更新进行确认, 并将用户签约数据传 递至新 MME;
步驟 613 , 如果新 MME确认 UE在当前的跟踪区内有效, 则向 UE发 送跟踪区更新接受消息; 步驟 614,如果新 MME通过 TAU流程为 UE分配了新 GUTI标识,那 么 UE会返回艮踪区更新完成消息以向 MME进行确认;
步驟 615, 原 MME向原 SGW发送释放会话请求消息, 通知 SGW删 除用户的上下文;
步驟 616, 原 SGW向原 MME返回释放会话响应消息。
本实施例是以 UE移动至新 MME覆盖区域为例说明的; UE移动至新 SGSN的处理方法与本实施例类似, 在此不再赘述。
参见图 7, 图 7为本发明实施例一中, UE发生切换并移动至新 MME 的流程图, 该流程包括以下步驟:
步驟 701 , 原 eNodeB决定向新 eNodeB发起 eNodeB间、 核心网节点 重分配的切换。
步驟 702 , 原 eNodeB向原 MME发送切换请求消息。
步驟 703, 原 MME根据 MME选择功能选择新 MME, 并向新 MME 发送节点重分配请求消息, 该消息中包括 PGW的地址和上行 TEID、 SGW 的地址和上行 TEID; 并在消息中携带 IP地址属性;
IP地址属性可以包括静态 IP地址和动态 IP地址, 可以采用标记进行 标识, 该标记可以用单独的 IE来表示, 也可以用 IE中的 "1"来指示动态 IP 地址, 用 "0"来表示静态 IP地址。
步驟 704 , 新 MME向 SGW发送会话建立请求消息, 请求消息中携带 PGW的 GTP-C隧道标识和 IP地址、 承载 QoS等; 该消息还需要携带 IP 地址属性;
步驟 705, SGW向 MME返回会话建立响应消息, 响应消息中携带有 SGW的 GTP-C隧道标识和自身的地址;
步驟 706,新 MME向新 eNodeB发送切换请求消息,以请求在新 eNodeB 中建立 UE上下文。 步驟 707 , 新 eNodeB向新 MME发送切换请求确认消息。
步驟 708 , 新 MME向原 MME发送节点重分配响应消息。
步驟 709 , 原 MME向原 eNodeB发送切换指示消息。
步驟 710, 原 eNodeB将切换指示消息转发至 UE。
步驟 711 , UE与新 eNodeB进行小区同步后, 向新 eNodeB发送切换确 认消息。
步驟 712 , 新 eNodeB向新 MME发送切换通知消息。
步驟 713, 新 MME向原 MME发送节点重分配完成的消息。
步驟 714, 原 MME向新 MME返回节点重分配完成的确认消息。
步驟 715, 新 MME向 SGW发起更新承载请求, 请求消息中携带新 eNodeB的用户面隧道标识和 IP地址;
步驟 716, SGW向 PGW发送更新承载请求, 将 SGW的地址信息、 隧 道标识信息、 UE的位置信息等参数发送给 PGW;
步驟 717, PGW更新自身的上下文, 并向 SGW返回更新承载响应消 步驟 718, SGW向新 MME返回更新承载响应消息。
本实施例是以 UE移动至新 MME覆盖区或为例说明的; UE移动至新 SGSN的处理方法与本实施例类似, 在此不再赘述。
参见图 8, 图 8为本发明实施例二中, UE移动至新 MME并发生 TAU 的流程图, 该流程包括以下步驟:
步驟 801 , UE移动到 MME下的 E-UTRAN覆盖区, 在向 MME发送 的跟踪区更新请求消息中除了携带 UE在原 MME下分配的 GUTI, UE还 需要携带自身的能力信息;
步驟 802, 新 MME根据收到的 GUTI标识找到原 MME, 向原 MME 发送上下文请求信令以进行上下文获取过程; 步驟 803 , 原 MME将用户的移动管理和 载信息发送给新 MME; 步驟 804, 新 MME向原 MME回复上下文确认消息;
步驟 805 , 新 MME向新 SGW发起会话建立请求, 请求消息中携带源 GTP-C隧道标识和目的 GTP-C隧道标识、 SGW控制面地址和 TEID、 UE 的位置信息;
步驟 806, SGW向 PGW发送更新承载请求,请求消息中携带 UE的位 置信息;
步驟 807, PGW更新自身的上下文并向 SGW返回更新承载响应消息, 消息中携带 IP地址属性;
步驟 808, SGW向新 MME返回会话建立响应, 将 SGW指定的目的 GTP-C隧道标识、 自身的地址以及 PGW的地址和隧道信息等带给 MME; 步驟 809 , 新 MME通过位置更新消息通知 HSS位置的改变; 步驟 810, HSS向原 MME发送位置取消信令;
步驟 811 , 原 MME向 HSS返回位置取消响应;
步驟 812, HSS对新 MME的位置更新进行确认, 并将用户签约数据传 递至新 MME;
步驟 813 , 如果新 MME确认 UE在当前的跟踪区内有效, 则向 UE发 送跟踪区更新接受消息;
步驟 814,如果新 MME通过 TAU流程为 UE分配了新 GUTI标识,那 么 UE会返回艮踪区更新完成消息以向 MME进行确认;
步驟 815, 原 MME向原 SGW发送释放会话请求消息, 通知 SGW删 除用户的上下文;
步驟 816, 原 SGW向原 MME返回释放会话响应消息。
本实施例是以 UE移动至新 MME覆盖区域为例说明的; UE移动至新 SGSN的处理方法与本实施例类似, 在此不再赘述。 参见图 9, 图 9为本发明实施例二中, UE发生切换并移动至新 MME 的流程图, 该流程包括以下步驟:
步驟 901 , 原 eNodeB决定向新 eNodeB发起 eNodeB间、 核心网节点 重分配的切换。
步驟 902 , 原 eNodeB向原 MME发送切换请求消息。
步驟 903, 原 MME根据 MME选择功能选择新 MME, 并向新 MME 发送节点重分配请求消息, 该消息中包括 PGW的地址和上行 TEID、 SGW 的地址和上行 TEID;
步驟 904 , 新 MME向 SGW发送会话建立请求消息, 请求消息中携带 PGW的 GTP-C隧道标识和 IP地址、 承载 QoS等; 该消息还需要携带 IP 地址属性;
步驟 905, SGW向 MME返回会话建立响应消息, 响应消息中携带有 SGW的 GTP-C隧道标识和自身的地址;
步驟 906,新 MME向新 eNodeB发送切换请求消息,以请求在新 eNodeB 中建立 UE上下文。
步驟 907 , 新 eNodeB向新 MME发送切换请求确认消息。
步驟 908 , 新 MME向原 MME发送节点重分配响应消息。
步驟 909, 原 MME向原 eNodeB发送切换指示消息。
步驟 910, 原 eNodeB将切换指示消息转发至 UE。
步驟 911 , UE与新 eNodeB进行小区同步后, 向新 eNodeB发送切换确 认消息。
步驟 912 , 新 eNodeB向新 MME发送切换通知消息。
步驟 913, 新 MME向原 MME发送节点重分配完成的消息。
步驟 914, 原 MME向新 MME返回节点重分配完成的确认消息。
步驟 915, 新 MME向 SGW发起更新承载请求, 请求消息中携带新 eNodeB的用户面隧道标识和 IP地址;
步驟 916, SGW向 PGW发送更新承载请求, 将 SGW的地址信息、 隧 道标识信息、 UE的位置信息等参数发送给 PGW;
步驟 917, PGW更新自身的上下文, 并向 SGW返回更新承载响应消 息; 消息中携带 IP地址属性, IP地址属性可以包括静态 IP地址和动态 IP 地址, 可以采用标记进行标识, 该标记可以用单独的 IE来表示, 也可以用 IE中的 "1,,来指示动态 IP地址, 用 "0"来表示静态 IP地址;
步驟 918 , SGW向新 MME返回更新承载响应消息。
本实施例是以 UE移动至新 MME覆盖区或为例说明的; UE移动至新 SGSN的处理方法与本实施例类似, 在此不再赘述。
上述各实施例中, 当新 SGW获知 UE的 IP地址属性之后, 与新 SGW 连接的 CGF即可根据所述 IP地址属性为 UE进行精确计费。
结合以上各实施例可见, 本发明实现 IP地址属性通知的操作思路可以 表示如图 10所示的流程, 该流程包括以下步驟:
步驟 1001 : 确认服务网关发生变化。
步驟 1002: 将 UE的 IP地址属性通知给新的服务网关。
为了保证上述各实施例以及操作思路能够顺利实现, 可以进行如图 11 所示的设置。 参见图 11 , 图 11为本发明实施例实现 IP地址属性通知的系 统图, 该系统包括相连的服务网关确认单元、 IP地址属性通知单元。
在实际应用时, 服务网关确认单元能够确认服务网关发生变化, 并将 该情况通知给 IP地址属性通知单元, 由 IP地址属性通知单元将 UE的 IP 地址属性通知给新的服务网关。
并且, 所述 IP地址属性通知单元在通知所述新 SGW时, 用于应用以 下方式中至少之一:
方式一、 控制移动管理单元在建立会话请求消息中将 UE的 IP地址属 性传递至 SGW;
方式二、 当 UE发生移动并且 SGW发生变化后, 控制 PGW将 UE的 IP地址属性传递给新 SGW。
针对方式一, 移动管理单元还用于: 通过包括附着、 UE请求 PDN连 接建立过程、 PDP上下文激活过程中至少之一, 获取所述 IP地址属性; 针对方式二, PGW用于在修改承载响应消息中传递所述 IP地址属性。 再有, 针对方式一, PGW还用于通过 SGW将 IP地址属性携带于建立 会话响应消息中传递至移动管理单元;当 UE移动至新移动管理单元覆盖区 新移动管理单元;
针对方式二, 在包括附着过程、 UE请求 PDN连接建立过程、 PDP上 下文激活过程中至少之一的处理过程中 , PGW还用于将所述 IP地址属性存 储在 PGW上下文中。
还可以包括与所述 SGW连接的 CGF,用于根据所述 IP地址属性为 UE 进行计费;
所述 IP地址属性包括 UE的 IP地址是动态 IP地址或是静态 IP地址。 所述移动管理单元为 MME或 SGSN。
另外, 还可以看出, 本发明实施例中的 SGW能够接收 UE的 IP地址 属性; 所述 SGW为 UE发生 SGW变化后的新的 SGW。
所述 IP地址属性由 IP地址属性通知单元发送; 所述 IP地址属性通知 单元在通知所述新 SGW时, 用于应用以下方式中至少之一:
方式一、 控制移动管理单元在建立会话请求消息中将 UE的 IP地址属 性传递至 SGW;
方式二、 当 UE发生移动并且 SGW发生变化后, 控制 PGW将 UE的 IP地址属性传递给新 SGW。 其中,针对方式一,移动管理单元还用于:通过包括附着、 UE请求 PDN 连接建立过程、 PDP上下文激活过程中至少之一, 获取所述 IP地址属性; 针对方式二, PGW用于在修改承载响应消息中传递所述 IP地址属性。 其中, 针对方式一, PGW还用于通过 SGW将 IP地址属性携带于建立 会话响应消息中传递至移动管理单元;当 UE移动至新移动管理单元覆盖区 新移动管理单元;
针对方式二, 在包括附着过程、 UE请求 PDN连接建立过程、 PDP上 下文激活过程中至少之一的处理过程中 , PGW还用于将所述 IP地址属性存 储在 PGW上下文中。
其中, 所述 SGW与 CGF连接; 所述 CGF用于根据所述 IP地址属性 为 UE进行计费。
其中, 所述 IP地址属性包括 UE的 IP地址是动态 IP地址或是静态 IP 地址。
其中, 所述移动管理单元为 MME或 SGSN。
综上所述可见, 无论是方法、 系统还是 SGW, 本发明实现 IP地址属性 通知的技术, 能够保证当 SGW发生变化时, 新 SGW能够及时获知 UE的 IP地址属性, 因而与 SGW相连接的 CGF能够根据所述 IP地址属性为 UE 进行精确计费。
以上所述, 仅为本发明的较佳实施例而已, 并非用于限定本发明的保 护范围。

Claims

权利要求书
1、 一种实现因特网协议 IP地址属性通知的方法, 该方法包括: 当服务网关 SGW发生变化时, 将用户设备 UE的 IP地址属性通知给 新 SGW。
2、 根据权利要求 1所述的方法, 其中, 通知所述新 SGW的方法为以 下方式中至少之一:
方式一、 移动管理单元在建立会话请求消息中将 UE的 IP地址属性传 递至 SGW;
方式二、当 UE发生移动并且 SGW发生变化后,分组数据网网关 PGW 将 UE的 IP地址属性传递给新 SGW。
3、 根据权利要求 2所述的方法, 其中,
针对方式一, 所述方法还包括: 移动管理单元通过包括附着、 UE请求 分组数据网 PDN连接建立过程、 PDP上下文激活过程中至少之一, 获取所 述 IP地址属性;
针对方式二, PGW在修改承载响应消息中传递所述 IP地址属性。
4、 根据权利要求 2所述的方法, 其中,
针对方式一, 所述方法还包括: PGW通过 SGW将 IP地址属性携带于 建立会话响应消息中传递至移动管理单元;当 UE移动至新移动管理单元覆 盖区域时, 原移动管理单元在上下文传递过程中将上述 IP地址属性传递至 新移动管理单元;
针对方式二, 所述方法还包括: 在包括附着过程、 UE请求 PDN连接 建立过程、 PDP上下文激活过程中至少之一的处理过程中, PGW将所述 IP 地址属性存储在 PGW上下文中。
5、根据权利要求 1至 4任一项所述的方法, 其中, 所述 IP地址属性包 括 UE的 IP地址是动态 IP地址或是静态 IP地址。
6、 根据权利要求 2至 4任一项所述的方法, 其中, 所述移动管理单元 为移动管理实体 MME或服务 GPRS支持节点 SGSN。
7、 根据权利要求 1至 4任一项所述的方法, 其中, 该方法还包括: 与所述 SGW连接的计费网关功能实体 CGF根据所述 IP地址属性为
UE进行计费。
8、 一种实现 IP地址属性通知的系统, 该系统包括服务网关确认单元、 IP地址属性通知单元; 其中,
所述服务网关确认单元, 用于确认服务网关发生变化, 并将该情况通 知给 IP地址属性通知单元;
所述 IP地址属性通知单元, 用于根据所述服务网关确认单元的通知, 将 UE的 IP地址属性通知给新的服务网关。
9、根据权利要求 8所述的系统, 其中, 所述 IP地址属性通知单元在通 知所述新 SGW时, 用于应用以下方式中至少之一:
方式一、 控制移动管理单元在建立会话请求消息中将 UE的 IP地址属 性传递至 SGW;
方式二、 当 UE发生移动并且 SGW发生变化后, 控制 PGW将 UE的 IP地址属性传递给新 SGW。
10、 根据权利要求 9所述的系统, 其中,
针对方式一, 移动管理单元还用于: 通过包括附着、 UE请求 PDN连 接建立过程、 PDP上下文激活过程中至少之一, 获取所述 IP地址属性; 针对方式二, PGW用于在修改承载响应消息中传递所述 IP地址属性。
11、 根据权利要求 9所述的系统, 其中,
针对方式一, PGW还用于通过 SGW将 IP地址属性携带于建立会话响 应消息中传递至移动管理单元; 当 UE移动至新移动管理单元覆盖区域时, 管理单元;
针对方式二, 在包括附着过程、 UE请求 PDN连接建立过程、 PDP上 下文激活过程中至少之一的处理过程中 , PGW还用于将所述 IP地址属性存 储在 PGW上下文中。
12、 根据权利要求 8至 11任一项所述的系统, 其中, 该系统还包括与 所述 SGW连接的 CGF, 用于根据所述 IP地址属性为 UE进行计费。
13、根据权利要求 8至 11任一项所述的系统, 其中, 所述 IP地址属性 包括 UE的 IP地址是动态 IP地址或是静态 IP地址。
14、 根据权利要求 9至 11任一项所述的系统, 其中, 所述移动管理单 元为 MME或 SGSN。
15、 一种 SGW, 用于接收 UE的 IP地址属性;
所述 SGW为 UE发生 SGW变化后的新的 SGW。
16、 根据权利要求 15所述的 SGW, 其中, 所述 IP地址属性由 IP地址 属性通知单元发送; 所述 IP地址属性通知单元在通知所述新 SGW时, 用 于应用以下方式中至少之一:
方式一、 控制移动管理单元在建立会话请求消息中将 UE的 IP地址属 性传递至 SGW;
方式二、 当 UE发生移动并且 SGW发生变化后, 控制 PGW将 UE的 IP地址属性传递给新 SGW。
17、 根据权利要求 16所述的 SGW, 其中,
针对方式一, 移动管理单元还用于: 通过包括附着、 UE请求 PDN连 接建立过程、 PDP上下文激活过程中至少之一, 获取所述 IP地址属性; 针对方式二, PGW用于在修改承载响应消息中传递所述 IP地址属性。
18、 根据权利要求 16所述的 SGW, 其中,
针对方式一, PGW还用于通过 SGW将 IP地址属性携带于建立会话响 应消息中传递至移动管理单元; 当 UE移动至新移动管理单元覆盖区域时, 管理单元;
针对方式二, 在包括附着过程、 UE请求 PDN连接建立过程、 PDP上 下文激活过程中至少之一的处理过程中 , PGW还用于将所述 IP地址属性存 储在 PGW上下文中。
19、 根据权利要求 15至 18任一项所述的 SGW, 其中, 所述 SGW与 CGF连接; 所述 CGF用于根据所述 IP地址属性为 UE进行计费。
20、根据权利要求 15至 18任一项所述的 SGW, 其中, 所述 IP地址属 性包括 UE的 IP地址是动态 IP地址或是静态 IP地址。
21、 根据权利要求 16至 18任一项所述的 SGW, 其中, 所述移动管理 单元为 MME或 SGSN。
PCT/CN2012/076824 2011-07-21 2012-06-13 一种实现ip地址属性通知的方法、系统和sgw WO2013010415A1 (zh)

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