WO2011160509A1 - 在分流网络中实现地址分配的方法和装置 - Google Patents

在分流网络中实现地址分配的方法和装置 Download PDF

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Publication number
WO2011160509A1
WO2011160509A1 PCT/CN2011/074126 CN2011074126W WO2011160509A1 WO 2011160509 A1 WO2011160509 A1 WO 2011160509A1 CN 2011074126 W CN2011074126 W CN 2011074126W WO 2011160509 A1 WO2011160509 A1 WO 2011160509A1
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Prior art keywords
address
pdn connection
connection type
gateway
core network
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PCT/CN2011/074126
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English (en)
French (fr)
Inventor
霍玉臻
周娜
王静
梁爽
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中兴通讯股份有限公司
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Publication of WO2011160509A1 publication Critical patent/WO2011160509A1/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

Definitions

  • the present invention relates to the field of communications, and in particular to a method and apparatus for implementing address allocation in a shunt network. Background technique
  • EPS Evolved Packet System
  • 3GPP 3rd Generation Partnership Project
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • MME Mobility Management Entity
  • S-GW Serving Gateway
  • P-GW Packet Data Network Gateway
  • HSS Home Subscriber Server
  • AAA GPP Authentication, Authorization and Accounting
  • PCRF Policy and Charging Rules Function
  • S-GW is an access gateway device connected to E-UTRAN, which forwards data between E-UTRAN and P-GW, and is responsible for buffering paging waiting data
  • P-GW is EPS and packet data network ( Packet Data Network (PDN)
  • PDN Packet Data Network
  • the border gateway of the network which is responsible for PDN access and forwarding data between EPS and PDN.
  • S-GW and P-GW belong to the core network gateway.
  • the core network gateway can be a GGSN.
  • the home base station is a small, low-power base station deployed in indoor places such as homes and offices.
  • the main purpose is to provide users with higher service rates and lower use of high-speed services. The cost required, while making up for the lack of coverage of existing distributed cellular wireless communication systems.
  • the advantages of home base stations are affordable, convenient, low power output, plug and play, and more.
  • the home base station is a wireless side network element.
  • the home base station can access the core network through the logical gateway of the home base station gateway, or can directly connect to the core network (as shown in FIG. 1). .
  • the main functions of the home base station gateway are: verifying the security of the home base station, handling the registration of the home base station, performing operation and maintenance management on the home base station, configuring and controlling the home base station according to the operator's requirements, and exchanging data of the core network and the home base station.
  • the mobile communication system (including the home base station system) can also support the IP offload function, and the terminal can be implemented under the condition that the wireless side network element has the IP offload capability and the user subscribes to allow the IP offload. Local access to other IP devices or the Internet on the home network.
  • the local gateway can be added to provide strong support for IP offload technology.
  • the local gateway provides address allocation, accounting, packet filtering, policy control, data offloading, and NAS/S 1 - AP/radio access network application (Radios Access).
  • Radios Access Network Application Part
  • GTP General Tunneling Protocol
  • PMIP Proxy Mobile IP
  • MIP Mobile IP
  • the local gateway can be combined with the wireless side network element.
  • the local gateway can be set up not only with the home base station (as shown in FIG. 2) or separately, but also with the home base station gateway (as shown in FIG. 3) or separately.
  • the local gateway may be a brand new functional entity, or may be a local service gateway (L-SGW, Local SGW), a local PGW (L-PGW, Local PGW), or a virtual SGW.
  • L-SGW, Local SGW local service gateway
  • PGW local PGW
  • V-SGW, Virtual SGW virtual PGW
  • V-PGW Virtual PGW
  • L-GGSN Local GGSN
  • data offloading function entity data offloading function entity.
  • an Extension Tunnel is also introduced in the architecture.
  • Figures 4 through 7 show the data flow paths for different IP offloads, respectively.
  • a direct tunnel is used to transfer data between the wireless side network element and the local gateway to ensure efficient data transmission.
  • the newly accessed wireless side network element and the local gateway cannot use the direct tunnel to transfer data, and the extended tunnel can continue to transmit data, thereby ensuring service continuity.
  • the downlink data received by the local gateway also needs to be transmitted through the extended tunnel, and the core network gateway triggers the paging.
  • the core network gateway In the process of establishing an IP-split connection, for a UE supporting a single PDN connection, the core network gateway (P-GW, GGSN) needs to allocate an address for the UE; and for a UE supporting multiple PDN connections, the local gateway needs to allocate the UE for the UE. address.
  • the address of any type of UE is allocated by the core network gateway, and there is currently no related technical support to correctly determine the subject that performs UE address allocation, so it is not reasonable and effective in the shunt network. The address is assigned to the UE. Summary of the invention
  • a method for implementing address allocation in a traffic distribution network includes: acquiring a capability of a terminal UE for determining an address assignment body; and determining, according to the acquired UE capability, a function entity that allocates an address for the UE.
  • the method for obtaining the capability of the UE is: providing UE-supported points in the process of attaching the UE Group data network PDN connection type; or,
  • the PDN connection type supported by the UE is provided; or, during the PDP context activation process, the PDN connection type supported by the UE is provided.
  • the process of determining the function entity of the UE to allocate an address includes: checking a PDN connection type supported by the UE, and if the UE does not support the multiple PDN connection, determining that the core network gateway is The UE allocates an address; if the UE supports multiple PDN connections, it is determined that the local gateway allocates an address for the UE.
  • the process of determining that the local gateway allocates an address for the UE includes: the core network gateway instructing the local gateway to allocate an address for the UE; or
  • the core network gateway sends the PDN connection type supported by the UE to the local gateway, and the local gateway determines that the UE allocates an address for the UE.
  • the method further includes: the functional entity that has been determined to allocate an address for the UE,
  • the UE allocates an address.
  • An apparatus for implementing address allocation in a split network includes a terminal capability providing unit and an address allocation decision unit;
  • the terminal capability providing unit is configured to acquire a UE capability capable of determining an address allocation body, and the address allocation determining unit is configured to determine, according to the UE capability acquired by the terminal capability providing unit, a functional entity that allocates an address to the UE.
  • the terminal capability providing unit is configured to: provide UE-supported during the attaching process of the UE
  • the PDN connection type supported by the UE is provided; or, during the PDP context activation process, the PDN connection type supported by the UE is provided.
  • the address allocation decision unit is configured to: check a PDN connection type supported by the UE, and if the UE does not support the multiple PDN connection, determine that the core network gateway allocates an address for the UE; The UE supports multiple PDN connections, and then determines the The gateway allocates an address to the UE.
  • the address allocation decision unit is configured to: when the local gateway allocates an address for the UE, to: indicate that the local gateway allocates an address for the UE; or
  • the PDN connection type supported by the UE is sent to the local gateway, and the local gateway is notified to determine that the address is allocated to the UE by itself.
  • the device further includes an address allocation execution unit, which is disposed in a functional entity that has been determined to allocate an address for the UE, where the functional entity is a local gateway or a core network gateway;
  • the address allocation execution unit is configured to allocate an address to the UE.
  • the method and device for realizing address allocation in the shunt network can realize reasonable and effective UE address allocation by the appropriate subject in the shunt network, which is beneficial to the UE to smoothly carry out the subsequent communication process and improve user satisfaction.
  • FIG. 1 is a schematic diagram of a wireless communication network architecture of the prior art
  • FIG. 2 is a structural diagram of a wireless communication network of the prior art 2;
  • 3 is a structural diagram of a wireless communication network of the prior art 3;
  • FIG. 4 is a schematic diagram of IP splitting of a wireless communication system according to prior art 1;
  • FIG. 5 is a schematic diagram of IP splitting of a wireless communication system according to prior art 2;
  • FIG. 6 is a schematic diagram of IP splitting of a wireless communication system of the prior art 3.
  • FIG. 7 is a schematic diagram of IP splitting of a wireless communication system of the prior art 4.
  • FIG. 8 is a flowchart of implementing address allocation according to Embodiment 1 of the present invention.
  • FIG. 9 is a flowchart of implementing address allocation according to Embodiment 2 of the present invention.
  • FIG. 10 is a flowchart of implementing address allocation according to Embodiment 3 of the present invention.
  • FIG. 11 is a schematic flow chart of implementing address allocation according to the present invention.
  • FIG. 12 is a diagram of an apparatus for implementing address allocation according to an embodiment of the present invention. detailed description
  • the core network gateway needs to be notified to the core network gateway, such as:
  • the UE notifies the mobility management entity of the supported PDN connection type in the attaching process, and the mobility management entity notifies the core network of the PDN connection type supported by the UE in the default bearer setup or PDN connection setup or PDP context activation process.
  • the gateway determines whether the address is allocated by the core network gateway to the UE by itself or by the local gateway according to the PDN connection type supported by the UE; or
  • the UE notifies the mobility management entity of the PDN connection type supported by the UE in the PDN connection establishment or the PDP context activation process, and then the mobility management entity forwards the PDN connection type supported by the UE to the core network gateway, and the core network gateway according to the UE
  • the supported PDN connection type determines whether the UE is assigned an address by itself or by the local gateway.
  • the UE notifies the mobility management entity of the supported PDN connection type in the attaching process, and the UE notifies the mobility management entity of the supported PDN connection type in the PDN connection establishment or PDP context activation process, and then the mobility management The entity forwards the PDN connection type supported by the UE to the core network gateway, and the core network gateway determines whether the address is allocated to the UE by itself or by the local gateway according to the PDN connection type supported by the UE.
  • the base station refers to a common base station or a home base station
  • the mobility management entity refers to the MME
  • the core network gateway is an SGW and a PGW.
  • the home base station is applied in the architecture and there is a home base station gateway, the message transmitted between the base station and the mobility management entity also needs to pass through the home base station gateway, but the home base station gateway does not modify the parameters related to the present invention, so The architecture is not specifically described here, but the present invention is applicable to scenarios where there is a home base station gateway.
  • the base station refers to the RNC or HNB GW
  • the mobility management entity refers to the SGSN
  • the core network gateway refers to the GGSN.
  • Figure 8 for the address allocation method in the EPS system attachment process, which is applicable to the EPS access system attachment process.
  • Step 801 The UE needs to establish an RRC (Radio Resource Control) connection before performing communication, so as to connect the bearer as a signaling message or service data.
  • the UE sends an Initialization NAS (Non-Access-Stratume) message attachment request to perform an attach operation.
  • the PDN connection type parameter supported by the UE is carried.
  • the PDN connection type parameter supported by the UE can be implemented in multiple ways. It can be different whether the UE supports multiple PDN connections or single PDN connections by different values of the same parameter. For example, when the UE supports multiple PDN connections, the parameter is 1. When the single PDN connection is supported, the parameter is 2; or the parameter is an indication, and the parameter is carried only when the UE supports the multi-PDN connection; or the parameter is an indication, and only when the UE supports the single PDN connection. Parameter; or the parameter is two indications, one of the indications is carried when the UE does not support the multi-PDN connection, and the other indication is carried when the UE supports the multiple PDN connection.
  • Step 802 The wireless side network element sends the initial user message to the mobility management entity, and forwards the attach request message to the mobility management entity.
  • the attach request message carries the PDN connection type parameter supported by the UE.
  • the mobility management entity may save the PDN connection type parameters supported by the UE.
  • Step 803 The mobility management entity starts the authentication and security process to authenticate the user.
  • Step 804 The mobility management entity sends a session establishment to the core network gateway after determining that an IP offload connection needs to be established according to an APN (Access Point Name) or a local access identifier (which may be carried in the message in step 802).
  • APN Access Point Name
  • the request needs to include the PDN connection type supported by the UE carried in the attach request by the UE in the session establishment request.
  • the core network gateway includes the S-GW and the P-GW, and the message interaction path between the mobility management entity and the core network gateway is: a mobility management entity-S-GW-P-GW, where, the S-GW Responsible for forwarding information between the mobility management entity and the P-GW.
  • Step 805 After receiving the session establishment request message, the core network gateway obtains the PDN connection type parameter supported by the UE, and determines the PDN connection type supported by the UE according to the parameter.
  • the core network gateway can save this parameter.
  • the PDN connection type parameter supported by the UE is a parameter, and different values are used to distinguish whether the UE supports multiple PDN connections or supports single PDN connections, the core network gateway can determine the UE support according to the specific value of the parameter.
  • PDN connection type PDN connection type
  • the core network gateway can determine the PDN connection type supported by the UE according to whether the parameter carries the parameter.
  • the core network gateway may determine, according to whether the message carries the parameter, the PDN connection type supported by the UE;
  • the core network gateway can determine, according to the specific indication carried in the message, that the UE supports The type of PDN connection.
  • the core network gateway in this step is the P-GW.
  • the P-GW determines the PDN connection type supported by the UE according to the PDN connection type parameter supported by the UE, and determines the subject of the UE address allocation according to the PDN connection type supported by the UE.
  • step 806a to step 809a are performed, and then steps 810 to 816 are performed; if the UE supports multiple PDN connections, step 806b to step 809b are performed, and then steps 810 to 816 are performed.
  • Step 806a If the core network gateway determines that the UE supports only a single PDN connection and does not support multiple PDN connections, it needs to allocate an IP address for the UE by itself.
  • Step 807a The core network gateway sends a tunnel configuration request to the local gateway to request the establishment of the extended tunnel.
  • the tunnel configuration request carries the address assigned to the UE.
  • the tunnel configuration request may further carry the PDN connection type supported by the UE.
  • the core network gateway in this step is a P-GW.
  • the extended tunnel is established between the P-GW and the local gateway, and the creation flow of the extended tunnel is performed between the P-GW and the local gateway. Cheng.
  • Step 808a The local gateway obtains the address allocated by the core network gateway for the UE, and according to this, the UE supports a single PDN connection, and does not need the local gateway to allocate an address for the UE.
  • the local gateway may also determine, according to the PDN connection type supported by the UE carried in the tunnel configuration request, whether an address needs to be allocated for the UE.
  • the local gateway can save the PDN connection type supported by the UE carried in the tunnel configuration request.
  • Step 809a The local gateway creates a user context, saves the UE address, and performs NAT processing on the address to perform IP offloading operations for the user.
  • the local gateway responds to the tunnel configuration response to the core network gateway. Go to step 810.
  • Step 806b If the core network gateway determines that the UE supports multiple PDN connections, it does not need to allocate an address for the UE, and needs to instruct the local gateway to allocate an address for the UE.
  • Step 807b The core network gateway sends a tunnel configuration request to the local gateway to request the establishment of the extended tunnel.
  • the tunnel configuration request may further carry the UE supporting the PDN connection type.
  • the core network gateway does not carry the address of the UE in the tunnel configuration request message to indicate that the local gateway UE supports multiple PDN connections, and the local gateway needs to allocate an address for the UE.
  • the local gateway is indicated by a PDN connection type parameter supported by the UE.
  • Step 808b The local gateway finds that the core network gateway does not allocate an address for the UE. According to this, the UE supports multiple PDN connections, and the local gateway needs to allocate an address for the UE. Optionally, the local gateway may also determine, according to the PDN connection type supported by the UE carried in the tunnel configuration request, whether to allocate an address for the UE. The local gateway can save the PDN connection type supported by the UE. The local gateway assigns an address to the UE.
  • Step 809b The local gateway creates a user context and saves it as the address allocated by the UE.
  • the local gateway responds to the tunnel configuration response to the core network gateway, where it carries the address assigned to the UE.
  • Step 810 The core network gateway sends a session establishment response to the mobility management entity.
  • Step 812 Perform an RRC connection configuration process.
  • Step 813 The wireless side network element replies to the mobility management entity with a context establishment response.
  • Step 814 The UE sends a direct transmission message to the radio side network element, including the attachment completion information.
  • Step 815 The wireless side network element sends an attach complete message to the mobility management entity.
  • Step 816 The mobility management entity requests an update bearer from the core network gateway, and the core network gateway performs bearer update with the mobility management entity accordingly.
  • Figure 9 illustrates the address allocation method in the PDN connection establishment process of the EPS system, which is applicable to the PDN connection establishment process initiated by the UE in the EPS system.
  • the process shown in Figure 9 includes the following steps:
  • Step 901 The UE has attached to the network and has a core network PDN connection.
  • the UE sends a PDN connection establishment request to the mobility management entity through the wireless side network element, requesting to establish a PDN connection.
  • the PDN connection establishment request message carries the PDN connection type parameter supported by the UE.
  • the mobility management entity can save the PDN connection type parameters supported by the UE.
  • Step 902 The mobility management entity sends a session establishment request to the core network gateway according to the APN or the local access identifier (the identifiers may be carried in the step 901), and the UE needs to be carried in the attach request.
  • the PDN connection type supported by the UE is included in the session establishment request.
  • Step 903 After receiving the session establishment request message, the core network gateway obtains the PDN connection type parameter supported by the UE, and determines the PDN connection type supported by the UE according to the parameter.
  • step 904a to step 907a are performed, and then steps 908 to 914 are performed; if the UE supports the multiple PDN connection, step 904b to step 907b are performed, and then steps 908 to 914 are performed.
  • Step 904a to step 907a The core network gateway allocates an address to the UE, and the specific operation content is the same as steps 806a to 809a. Proceed to step 908.
  • Step 904b to step 907b The local gateway allocates an address to the UE, and the specific operation content is the same as step 806b to step 809b.
  • Step 908 The core network gateway sends a session establishment response to the mobility management entity.
  • Step 909 The mobility management entity initiates a bearer setup request to the radio side network element.
  • Step 910 Perform an RRC connection configuration process.
  • Step 911 The wireless side network element returns a bearer setup response to the mobility management entity.
  • Step 912 The UE sends a direct transmission message to the radio side network element, and includes PDN connection establishment completion information.
  • Step 913 The radio side network element sends a PDN connection establishment complete message to the mobility management entity.
  • the PDN connection establishment request message carries the PDN connection type supported by the UE.
  • the carrying of the parameter is optional, that is, the PDN connection establishment request initiated by the UE may not carry the parameter, and the parameter that is obtained and saved in the attaching process by the mobility management entity (that is, the PDN connection type supported by the UE) ) Not notified to the core network gateway in step 902.
  • FIG. 10 illustrates an address allocation method in a PDP context activation procedure of a UTRAN/GERAN system, which is applicable to a PDP context activation procedure of a UTRAN/GERAN system.
  • the process shown in Figure 10 includes the following steps:
  • Step 1001 The UE successfully attaches to the network by performing an attach procedure.
  • Step 1002 The UE sends a PDP context activation request message to the mobility management entity by using the radio side network element, and carries the PDN connection type parameter supported by the UE.
  • the mobility management entity may save the PDN connection type parameters supported by the UE.
  • the implementation manner of the PDN connection type parameter supported by the UE is consistent with the description in FIG. 8.
  • Step 1003 The mobility management entity sends a PDP context establishment request to the core network gateway, and needs to carry the UE in the request, after determining that the IP offload connection needs to be established according to the APN or the local access identifier (the identifiers may be carried in the message in step 1002). Supported PDN connection type parameters.
  • the core network gateway is the GGSN.
  • Step 1004 After receiving the message, the core network gateway obtains the PDN connection type parameter supported by the UE, and determines the PDN connection type supported by the UE according to the parameter. The core network gateway can save this parameter.
  • the core network gateway can determine the UE according to the specific value of the parameter. Supported PDN connection types;
  • the core network gateway can determine the PDN connection type supported by the UE according to whether the parameter carries the parameter.
  • the core network gateway may determine, according to whether the message carries the parameter, the PDN connection type supported by the UE;
  • the core network gateway can determine, according to the specific indication carried in the message, that the UE supports The type of PDN connection.
  • step 1005a to step 1008a is performed, and then steps 1009 to 1012 are performed; if the UE supports a single PDN connection, step 1005b to step 1008b is performed, and then steps 1009 to 1012 are performed.
  • Step 1005a If the core network gateway determines that the UE supports only a single PDN connection and does not support multiple For a PDN connection, it is necessary to assign an IP address to the UE by itself.
  • Step 1006a The core network gateway sends a tunnel configuration request to the local gateway to request the establishment of the extended tunnel, and the tunnel configuration request also needs to carry the address allocated for the UE.
  • the tunnel configuration request may further carry a PDN connection type supported by the UE.
  • Step 1007a The local gateway obtains an address assigned by the core network gateway to the UE, and according to this, the UE supports a single PDN connection, and does not need the local gateway to allocate an address for the UE.
  • the local gateway may also determine whether the UE needs to be assigned an address according to the PDN connection type supported by the UE carried in the tunnel configuration request. The local gateway can save the PDN connection type supported by the UE.
  • Step 1008a The local gateway creates a user context, saves the address assigned to the UE, and performs NAT processing on the address to perform IP offloading for the user.
  • the local gateway responds to the tunnel configuration response to the core network gateway. Go to step 1009.
  • Step 1005b If the core network gateway determines that the UE supports multiple PDN connections, it does not need to allocate an address for the UE by itself, and needs to instruct the local gateway to allocate an address for the UE.
  • Step 1006b The core network gateway sends a tunnel configuration request to the local gateway to request the establishment of the extended tunnel.
  • the tunnel configuration request may further carry the UE supporting the PDN connection type.
  • the core network gateway indicates that the local gateway UE supports multiple PDN connections by not carrying the address of the UE in the tunnel configuration request message, and the local gateway needs to allocate an address for the UE.
  • the local gateway is indicated by a PDN connection type parameter supported by the UE.
  • Step 1007b The local gateway learns that the core network gateway does not allocate an address for the UE. According to this, the UE supports multiple PDN connections, and the local gateway needs to allocate an address for the UE. Optionally, the local gateway may also determine, according to the PDN connection type supported by the UE carried in the tunnel configuration request, whether to allocate an address for the UE. The local gateway can save the PDN connection type supported by the UE. The local gateway assigns an address to the UE.
  • Step 1008b The local gateway creates a user context and saves the address assigned to the UE. Local The gateway responds to the tunnel configuration response to the core network gateway, where the address assigned to the UE is carried.
  • Step 1009 The core network gateway responds to the mobility management entity with a PDP context establishment response.
  • Step 1010 Perform a radio access bearer establishment process.
  • Step 1011 The mobility management entity may send a PDP context update request to the core network gateway to notify the core network gateway of the modified QoS parameters.
  • the core network gateway may respond to the mobility management entity with a PDP context update response to complete the PDP context update.
  • Step 1012 The mobility management entity returns a PDP context activation response message to the UE.
  • the PDN connection type supported by the UE is brought to the core network gateway when the PDP context is established; based on this, in the attaching process, the UE may not carry the parameter.
  • the UE may notify the mobility management entity of the PDN connection type supported by the UE in the attach procedure, and the mobility management entity saves the parameter; afterwards, the UE initiates a PDP context activation process, and the UE does not carry
  • the saved parameter may be notified to the core network gateway by the mobility management entity.
  • FIG. 11 is a schematic flowchart of implementing address allocation according to the present invention, where the process includes the following steps:
  • Step 1110 Acquire a UE capability for determining an address allocation body.
  • Step 1120 Determine, according to the acquired UE capability, a functional entity that allocates an address for the UE.
  • the settings shown in Figure 12 can be performed.
  • FIG. 12 is a diagram of an apparatus for implementing address allocation according to an embodiment of the present invention.
  • the apparatus includes an associated terminal capability providing unit, an address allocation decision unit, and an address allocation executing unit.
  • the terminal capability providing unit may be configured in a functional entity such as a UE, a mobility management entity, or the like, and can provide a UE, such as a PDN connection type supported by the UE, to a functional entity in need, such as an address allocation decision unit.
  • the address allocation decision unit may be disposed in a functional entity such as a core network gateway, and is capable of receiving a PDN connection type supported by the UE provided by the terminal capability providing unit. And other terminal capabilities, and based on this, determine the functional entity that assigns an address to the UE, such as: a core network gateway, a local gateway, and the like.
  • the address allocation execution unit may be set in a functional entity capable of assigning an address to the UE, such as a core network gateway and a local gateway. After the address allocation decision unit determines the function entity that allocates the address to the UE, the address allocation execution unit in the function entity may be notified to allocate an address for the UE, and the corresponding address allocation execution unit may allocate an address to the UE according to the received notification. It is further possible to notify the UE of the assigned address.
  • an intermediate entity such as a mobility management entity may be connected between two of the terminal capability providing unit, the address allocation decision unit, and the address allocation executing unit.
  • the terminal capability providing unit may provide the UE capability in the process of attaching, initiating a PDN connection establishment process, and initiating a PDP context activation; and the UE capability may be expressed in one of the foregoing.
  • the present invention can implement a reasonable and effective UE address allocation in an offloaded network by implementing an address allocation technology in a split network, which is beneficial to the UE to smoothly carry out subsequent communication processes. , improved user satisfaction.

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Description

在分流网络中实现地址分配的方法和装置 技术领域
本发明涉及通信领域, 具体涉及在分流网络中实现地址分配的方法和 装置。 背景技术
第三代合作伙伴计划 ( 3rd Generation Partnership Project, 3GPP )演进 的分组系统(Evolved Packet System, EPS ) 由演进的通用移动通信系统陆 地无线接入网 ( Evolved Universal Terrestrial Radio Access Network , E-UTRAN )、 移动性管理单元 ( Mobility Management Entity, MME )、 服务 网关( Serving Gateway, S-GW )、 分组数据网络网关 ( Packet Data Network Gateway, P-GW或者 PDN GW)、归属用户服务器( Home Subscriber Server, HSS )、 3 GPP的认证授权计费 ( Authentication、 Authorization and Accounting, AAA )服务器, 策略和计费规则功能( Policy and Charging Rules Function, PCRF ) 实体及其他支撑节点组成。
图 1为现有技术一的无线通信网络架构图, 如图 1所示, 移动性管理 实体负责移动性管理、 非接入层信令的处理和用户移动管理上下文的管理 等控制面的相关工作; S-GW 是与 E-UTRAN 相连的接入网关设备, 在 E-UTRAN和 P-GW之间转发数据, 并且负责对寻呼等待数据进行緩存; P-GW则是 EPS与分组数据网络( Packet Data Network, PDN ) 网络的边界 网关,负责 PDN的接入及在 EPS与 PDN间转发数据等功能; S-GW和 P-GW 都属于核心网网关。 在 UTRAN系统中, 核心网网关可以为 GGSN。
家用基站是一种小型、 低功率的基站, 部署在家庭及办公室等室内场 所, 主要作用是为了给用户提供更高的业务速率并降低使用高速率服务所 需要的费用, 同时弥补已有分布式蜂窝无线通信系统覆盖的不足。 家用基 站的优点是实惠、 便捷、 低功率输出、 即插即用等。 在家用基站系统中, 家用基站为无线侧网元。
图 2为现有技术二的无线通信网络架构图, 如图 2所示, 家用基站可 以通过家用基站网关这个逻辑网关接入到核心网络, 也可以直接连接到核 心网络(如图 1所示)。 其中, 家用基站网关主要功能为: 验证家用基站的 安全性, 处理家用基站的注册, 对家用基站进行运行维护管理, 根据运营 商要求配置和控制家用基站, 负责交换核心网和家用基站的数据。
除了支持移动核心网络的接入以外, 移动通信系统(包括家用基站系 统)还可支持 IP分流功能, 在无线侧网元具备 IP分流能力以及用户签约允 许 IP分流的条件下, 可实现终端 ( UE )对家用网络其他 IP设备或者互联 网络的本地接入。
图 1、 图 2和图 3所示系统中, 可以通过增设本地网关来提供对 IP分 流技术的有力支持。 本地网关作为本地接入到外部网络(例如 Internet ) 的 网关, 提供地址分配、 计费、 分组包过滤、 策略控制、 数据分流功能、 NAS/S 1 - AP/无线接入网应用部分 ( Radios Access Network Application Part , RANAP ) /通用隧道协议( General Tunneling Protocol, GTP ) /代理移动 IP 协议 ( Proxy Mobile IP, PMIP ) /移动 IP协议 ( Mobile IP, MIP )消息解析、 网络地址转换(Network Address Translation, NAT ), IP分流策略路由和执 行等功能。 本地网关可与无线侧网元进行合设。
当存在家用基站网关的情况下, 本地网关不仅可与家用基站进行合设 (如图 2所示)或分设, 也可与家用基站网关进行合设(如图 3所示)或 分设。
其中, 本地网关除了可以是一个全新的功能实体, 还可以是本地服务 网关( L-SGW, Local SGW )、本地 PGW ( L-PGW, Local PGW )、虚拟 SGW ( V-SGW, Virtual SGW ),虚拟 PGW ( V-PGW, Virtual PGW ),本地 GGSN ( L-GGSN, Local GGSN )、 数据分流功能实体。
为了保证 IP 分流连接在用户位置发生移动的过程中仍然能够保持连 续, 在架构中还引入了扩展隧道( Extension Tunnel )。 图 4至图 7分别示出 了不同的 IP分流的数据流路径。 当 UE初始建立连接时, 在无线侧网元和 本地网关之间使用直接隧道传递数据, 以保证数据传递的高效性。 一旦 UE 的位置发生了移动, 新接入的无线侧网元和本地网关之间不能够使用直接 隧道传递数据, 则可以通过扩展隧道来继续传递数据, 从而保证业务的连 续性。 此外, 当用户进入空闲态后, 本地网关收到的下行数据也需要通过 扩展隧道进行传递, 并由核心网网关触发寻呼。
在 IP分流连接建立的过程中, 对于支持单 PDN连接的 UE, 需要由核 心网网关 (P-GW、 GGSN )为 UE分配地址; 而对于支持多 PDN连接的 UE, 需要由本地网关为 UE分配地址。 然而, 在现有技术中, 任何类型 UE 的地址都是由核心网网关分配的, 并且目前也没有相关的技术支持能够正 确判别进行 UE地址分配的主体, 因此在分流网络中尚不能合理、有效地为 UE分配地址。 发明内容
有鉴于此, 本发明的主要目的在于提供一种在分流网络中实现地址分 配的方法和装置,在分流网络中由恰当的主体实现合理、有效地 UE地址分 配。
为达到上述目的, 本发明的技术方案是这样实现的:
一种在分流网络中实现地址分配的方法, 包括: 获取用于确定地址分 配主体的终端 UE能力; 根据所获取的 UE能力, 确定为 UE分配地址的功 能实体。
获取所述 UE能力的方法为: 在 UE的附着过程中, 提供 UE支持的分 组数据网络 PDN连接类型; 或者,
在 PDN连接建立过程中, 提供 UE支持的 PDN连接类型; 或者, 在 PDP上下文激活过程中, 提供 UE支持的 PDN连接类型。
所述 UE能力为 UE支持的 PDN连接类型时, 所述确定为 UE分配地 址的功能实体的过程包括: 检查 UE支持的 PDN连接类型, 如果 UE不支 持多 PDN连接,则确定由核心网网关为 UE分配地址;如果 UE支持多 PDN 连接, 则确定由本地网关为 UE分配地址。
所述确定由本地网关为 UE分配地址的过程包括:核心网网关指示本地 网关为 UE分配地址; 或者,
核心网网关将 UE支持的 PDN连接类型发送给本地网关, 本地网关据 此确定由自身为 UE分配地址。
该方法进一步包括: 由已经确定的为 UE分配地址的所述功能实体,为
UE分配地址。
一种在分流网络中实现地址分配的装置, 包括终端能力提供单元、 地 址分配决策单元; 其中,
所述终端能力提供单元, 用于获取能够确定地址分配主体的 UE能力; 所述地址分配决策单元,用于根据所述终端能力提供单元所获取的 UE 能力, 确定为 UE分配地址的功能实体。
所述终端能力提供单元用于: 在 UE的附着过程中, 提供 UE支持的
PDN连接类型; 或者,
在 PDN连接建立过程中, 提供 UE支持的 PDN连接类型; 或者, 在 PDP上下文激活过程中, 提供 UE支持的 PDN连接类型。
所述 UE能力为 UE支持的 PDN连接类型时, 所述地址分配决策单元 用于: 检查 UE支持的 PDN连接类型, 如果 UE不支持多 PDN连接, 则确 定由核心网网关为 UE分配地址; 如果 UE支持多 PDN连接, 则确定由本 地网关为 UE分配地址。
所述地址分配决策单元在确定由本地网关为 UE分配地址时,用于:指 示本地网关为 UE分配地址; 或者,
将 UE支持的 PDN连接类型发送给本地网关, 通知本地网关据此确定 由自身为 UE分配地址。
该装置进一步包括地址分配执行单元, 设置于已经确定的用于为 UE 分配地址的功能实体中, 该功能实体为本地网关或核心网网关;
所述地址分配执行单元, 用于为 UE分配地址。
本发明在分流网络中实现地址分配的方法和装置, 能够在分流网络中 由恰当的主体实现合理、有效地 UE地址分配, 有利于 UE顺利进行后续通 信过程, 提高了用户满意度。 附图说明
图 1为现有技术一的无线通信网络架构图;
图 2为现有技术二的无线通信网络架构图;
图 3为现有技术三的无线通信网络架构图;
图 4为现有技术一的无线通信系统 IP分流示意图;
图 5为现有技术二的无线通信系统 IP分流示意图;
图 6为现有技术三的无线通信系统 IP分流示意图;
图 7为现有技术四的无线通信系统 IP分流示意图;
图 8为本发明实施例一的实现地址分配的流程图;
图 9为本发明实施例二的实现地址分配的流程图;
图 10为本发明实施例三的实现地址分配的流程图;
图 11为本发明实现地址分配的流程简图;
图 12为本发明一实施例的实现地址分配的装置图。 具体实施方式
总体而言, 需要将核心网网关所需 UE能力通知核心网网关, 比如:
UE在附着过程中将其支持的 PDN连接类型通知给移动性管理实体, 由移动性管理实体在默认承载建立或 PDN连接建立或 PDP上下文激活过程 中,将 UE支持的 PDN连接类型通知给核心网网关, 由核心网网关根据 UE 支持的 PDN连接类型确定由自身还是由本地网关为 UE分配地址; 或者,
UE在 PDN连接建立或 PDP上下文激活过程中将其支持的 PDN连接 类型通知给移动性管理实体, 再由移动性管理实体将 UE支持的 PDN连接 类型转发给核心网网关, 由核心网网关根据 UE支持的 PDN连接类型确定 由自身还是由本地网关为 UE分配地址。 或者,
UE在附着过程中将其支持的 PDN连接类型通知给移动性管理实体, 且 UE在 PDN连接建立或 PDP上下文激活过程中将其支持的 PDN连接类 型通知给移动性管理实体, 再由移动性管理实体将 UE支持的 PDN连接类 型转发给核心网网关, 由核心网网关根据 UE支持的 PDN连接类型确定由 自身还是由本地网关为 UE分配地址。
在实际应用中, 如果是 LTE接入, 则基站指普通基站或者家用基站, 移动性管理实体指 MME, 核心网网关为 SGW和 PGW。 进一步而言, 如果 架构中应用家用基站并且存在家用基站网关, 则基站和移动性管理实体之 间传递的消息还需要通过家用基站网关, 但是家用基站网关不会修改与本 发明相关的参数, 因此这里不对该架构进行特殊说明, 但是本发明适用于 存在家用基站网关的场景。 如果是 UTRAN/GERAN接入, 则基站指 RNC 或者 HNB GW, 移动性管理实体指 SGSN, 核心网网关指 GGSN。
参见图 8, 图 8描述了 EPS系统附着流程中的地址分配方法, 适用于 EPS接入系统附着流程。
图 8所示流程包括以下步骤: 步骤 801 : UE在进行通信前需要建立 RRC ( Radio Resource Control, 无线资源控制)连接, 以此连接作为信令消息或者业务数据的承载。 UE发 送初始化 NAS ( Non- Access-Stratum, 非接入层)消息附着请求进行附着操 作。 在附着请求消息中, 携带 UE支持的 PDN连接类型参数。
UE支持的 PDN连接类型参数的实现方式有多种, 可以是通过同一个 参数的不同取值来区别 UE是支持多 PDN连接还是支持单 PDN连接, 如 UE支持多 PDN连接时该参数为 1 , 支持单 PDN连接时该参数为 2; 或者, 该参数是一个指示, 只有当 UE支持多 PDN连接时才携带该参数; 或者, 该参数是一个指示, 只有当 UE支持单 PDN连接时才携带该参数; 或者该 参数是两个指示, 当 UE不支持多 PDN连接时携带其中一个指示,而当 UE 支持多 PDN连接时则携带另一个指示。
步骤 802: 无线侧网元将初始的用户消息发给移动性管理实体, 并转发 附着请求消息至移动性管理实体。在附着请求消息中携带有 UE支持的 PDN 连接类型参数。 移动性管理实体可以保存 UE支持的 PDN连接类型参数。
步骤 803: 移动性管理实体开启鉴权以及安全流程, 对用户进行验证。 步骤 804:移动性管理实体根据 APN ( Access Point Name,接入点名称) 或本地访问标识 (这些标识可以在步骤 802 的消息中携带)确定需要建立 IP分流连接后, 向核心网网关发送会话建立请求, 同时需要将 UE在附着 请求中携带的 UE支持的 PDN连接类型包含在会话建立请求中。
对于 EPS系统, 核心网网关包括 S-GW和 P-GW, 移动性管理实体与 核心网网关之间的消息交互路径为: 移动性管理实体一 S-GW— P-GW, 其 中, S-GW负责在移动性管理实体和 P-GW之间转发信息。
步骤 805: 核心网网关收到会话建立请求消息后, 获取其中包含的 UE 支持的 PDN连接类型参数,并根据该参数判断 UE所支持的 PDN连接类型。 核心网网关可以保存该参数。 当 UE支持的 PDN连接类型参数是一个参数,以不同的取值来区别 UE 是支持多 PDN连接还是支持单 PDN连接时, 核心网网关可以根据该参数 的具体取值来判断出 UE所支持的 PDN连接类型;
当该参数是一个指示, 并且只有当 UE支持多 PDN连接时才携带该参 数时, 核心网网关可以根据消息中是否携带该参数来判断出 UE 所支持的 PDN连接类型;
当该参数是一个指示, 并且只有当 UE支持单 PDN连接时才携带该参 数时, 核心网网关可以根据消息中是否携带该参数来判断出 UE 所支持的 PDN连接类型;
当该参数是两个指示,并且当 UE不支持多 PDN连接时携带一个指示, 以及支持多 PDN连接时携带另一个指示时, 核心网网关可以根据消息中携 带的具体指示来判断出 UE所支持的 PDN连接类型。
此步骤中的核心网网关是 P-GW。 对于 EPS系统, P-GW为根据 UE支 持的 PDN连接类型参数判断 UE所支持的 PDN连接类型,并根据 UE所支 持的 PDN连接类型判断进行 UE地址分配的主体。
若 UE支持单 PDN连接, 则执行步骤 806a至步骤 809a, 之后执行步 骤 810至步骤 816;若 UE支持多 PDN连接,则执行步骤 806b至步骤 809b, 之后执行步骤 810至步骤 816。
步骤 806a: 若核心网网关判断出 UE只支持单 PDN连接而不支持多 PDN连接, 则需要由自身为 UE分配 IP地址。
步骤 807a: 核心网网关向本地网关发送隧道配置请求, 以请求扩展隧 道的建立。 隧道配置请求中携带有为 UE分配的地址, 可选的, 隧道配置请 求中还可以进一步携带 UE支持的 PDN连接类型。
此步骤中的核心网网关是 P-GW, 对于 EPS 系统, 扩展隧道是建立在 P-GW和本地网关之间的,由 P-GW和本地网关之间执行扩展隧道的创建流 程。
步骤 808a: 本地网关获得核心网网关为 UE分配的地址, 据此得知 UE 支持单 PDN连接, 不需要本地网关为 UE分配地址。 可选的, 本地网关也 可以根据隧道配置请求中携带的 UE支持的 PDN连接类型来判断是否需要 为 UE分配地址。 本地网关可以保存隧道配置请求中所携带的 UE支持的 PDN连接类型。
步骤 809a: 本地网关创建用户上下文, 保存 UE地址, 并对地址进行 NAT处理, 以便为用户进行 IP分流操作。 本地网关向核心网网关回应隧道 配置响应。 进入步骤 810。
步骤 806b: 若核心网网关判断出 UE支持多 PDN连接, 则不需要由自 身为 UE分配地址, 同时需要指示本地网关为 UE分配地址。
步骤 807b: 核心网网关向本地网关发送隧道配置请求, 请求扩展隧道 的建立。 可选的, 隧道配置请求中还可以进一步携带 UE支持 PDN连接类 型。
此步骤中, 核心网网关通过在隧道配置请求消息中不携带 UE的地址, 以指示本地网关 UE支持多 PDN连接, 需要本地网关为 UE分配地址。 或 者可选的, 通过 UE支持的 PDN连接类型参数来指示本地网关。
步骤 808b: 本地网关发现核心网网关没有为 UE分配地址, 据此得知 UE支持多 PDN连接, 需要本地网关为 UE分配地址。 可选的, 本地网关 也可以根据隧道配置请求中携带的 UE支持的 PDN连接类型来判断是否需 要为 UE分配地址。 本地网关可以保存 UE支持的 PDN连接类型。 本地网 关为 UE分配地址。
步骤 809b: 本地网关创建用户上下文, 保存为 UE所分配的地址。 本 地网关向核心网网关回应隧道配置响应, 在其中携带为 UE分配的地址。
步骤 810: 核心网网关向移动性管理实体发送会话建立响应。 步骤 812: 执行 RRC连接配置过程。
步骤 813: 无线侧网元向移动性管理实体回复上下文建立响应。
步骤 814: UE向无线侧网元发送直传消息, 包含附着完成信息。
步骤 815: 无线侧网元向移动性管理实体发送附着完成消息。
步骤 816: 移动性管理实体向核心网网关请求更新承载, 核心网网关据 此与移动性管理实体进行承载更新。
参见图 9, 图 9描述了 EPS系统的 PDN连接建立流程中的地址分配方 法, 适用于 EPS系统中 UE发起的 PDN连接建立流程。 图 9所示流程包括 以下步骤:
步骤 901 : UE已经附着到网络, 具有核心网 PDN连接。 UE通过无线 侧网元向移动性管理实体发送 PDN连接建立请求, 请求建立 PDN连接。 在 PDN连接建立请求消息中,携带 UE支持的 PDN连接类型参数。移动性 管理实体可以保存 UE支持的 PDN连接类型参数。
其中, UE支持的 PDN连接类型参数的实现方式与图 8中的描述一致。 步骤 902: 移动性管理实体根据 APN或本地访问标识(这些标识可以 在步骤 901中携带)确定需要建立 IP分流连接后, 向核心网网关发送会话 建立请求, 同时需要将 UE在附着请求中携带的 UE支持的 PDN连接类型 包含在会话建立请求中。
步骤 903: 核心网网关收到会话建立请求消息后, 获取其中包含的 UE 支持的 PDN连接类型参数,并根据该参数判断 UE所支持的 PDN连接类型。
本步骤的具体操作内容与步骤 805相同。
若 UE支持单 PDN连接, 则执行步骤 904a至步骤 907a, 之后执行步 骤 908至步骤 914;若 UE支持多 PDN连接,则执行步骤 904b至步骤 907b, 之后执行步骤 908至步骤 914。 步骤 904a至步骤 907a: 核心网网关为 UE分配地址的相关流程, 具体 的操作内容与步骤 806a至步骤 809a相同。 进入步骤 908。
步骤 904b至步骤 907b: 本地网关为 UE分配地址的相关流程, 具体的 操作内容与步骤 806b至步骤 809b相同。
步骤 908: 核心网网关向移动性管理实体发送会话建立响应。
步骤 909: 移动性管理实体向无线侧网元发起承载建立请求。
步骤 910: 执行 RRC连接配置过程。
步骤 911 : 无线侧网元向移动性管理实体回复承载建立响应。
步骤 912: UE向无线侧网元发送直传消息, 包含 PDN连接建立完成信 息。
步骤 913:无线侧网元向移动性管理实体发送 PDN连接建立完成消息。 步骤 914: 移动性管理实体向核心网网关请求更新承载, 核心网网关据 此与移动性管理实体进行承载更新。
本实施例中, UE发起 PDN连接建立流程时, 在 PDN连接建立请求消 息中携带了 UE支持的 PDN连接类型。 该参数的携带是可选的, 即 UE发 起的 PDN连接建立请求中可以不携带该参数, 此时需要由移动性管理实体 将在附着流程中获得并保存的参数 (即 UE支持的 PDN连接类型 )在步骤 902中通知给核心网网关。
参见图 10,图 10描述了 UTRAN/GERAN系统的 PDP上下文激活流程 中的地址分配方法, 适用于 UTRAN/GERAN系统的 PDP上下文激活流程。 图 10所示流程包括以下步骤:
步骤 1001 : UE通过执行附着流程, 成功附着到网络。
步骤 1002: UE通过无线侧网元发送 PDP上下文激活请求消息给移动 性管理实体, 同时携带 UE支持的 PDN连接类型参数。 移动性管理实体可 以保存 UE支持的 PDN连接类型参数。 其中, UE支持的 PDN连接类型参数的实现方式与图 8中的描述一致。 步骤 1003: 移动性管理实体根据 APN或本地访问标识(这些标识可以 在步骤 1002消息中携带)确定需要建立 IP分流连接后,向核心网网关发送 PDP上下文建立请求, 同时需要在该请求中携带 UE支持的 PDN连接类型 参数。
对于 UTRAN/GERAN系统而言, 核心网网关为 GGSN。
步骤 1004: 核心网网关收到该消息后, 获取 UE支持 PDN连接类型参 数, 并根据该参数的判断 UE所支持的 PDN连接类型。 核心网网关可以保 存该参数。
当 UE支持的 PDN连接类型参数是同一个参数, 并且以不同的取值来 区别 UE是支持多 PDN连接还是支持单 PDN连接时,核心网网关可以根据 该参数的具体取值来判断出 UE所支持的 PDN连接类型;
当该参数是一个指示, 并且只有当 UE支持多 PDN连接时才携带该参 数时, 核心网网关可以根据消息中是否携带该参数来判断出 UE 所支持的 PDN连接类型;
当该参数是一个指示, 并且只有当 UE支持单 PDN连接时才携带该参 数时, 核心网网关可以根据消息中是否携带该参数来判断出 UE 所支持的 PDN连接类型;
当该参数是两个指示,并且当 UE不支持多 PDN连接时携带一个指示, 以及支持多 PDN连接时携带另一个指示时, 核心网网关可以根据消息中携 带的具体指示来判断出 UE所支持的 PDN连接类型。
若 UE支持单 PDN连接, 则执行步骤 1005a至步骤 1008a, 之后执行 步骤 1009至步骤 1012; 若 UE支持单 PDN连接, 则执行步骤 1005b至步 骤 1008b, 之后执行步骤 1009至步骤 1012。
步骤 1005a: 若核心网网关判断出 UE只支持单 PDN连接而不支持多 PDN连接, 则需要由自身为 UE分配 IP地址。
步骤 1006a: 核心网网关向本地网关发送隧道配置请求, 请求扩展隧道 的建立, 隧道配置请求中还需携带为 UE分配的地址。 可选的, 隧道配置请 求中还可以进一步携带 UE支持的 PDN连接类型。
步骤 1007a: 本地网关获得核心网网关为 UE分配的地址, 据此得知 UE支持单 PDN连接, 不需要本地网关为 UE分配地址。 可选的, 本地网 关也可以根据隧道配置请求中携带的 UE支持的 PDN连接类型来判断是否 需要为 UE分配地址。 本地网关可以保存 UE支持的 PDN连接类型。
步骤 1008a: 本地网关创建用户上下文, 保存为 UE分配的地址, 并对 地址进行 NAT处理, 以便为用户进行 IP分流操作。本地网关向核心网网关 回应隧道配置响应。 进入步骤 1009。
步骤 1005b: 若核心网网关判断出 UE支持多 PDN连接, 则不需要由 自身为 UE分配地址, 同时需要指示本地网关为 UE分配地址。
步骤 1006b: 核心网网关向本地网关发送隧道配置请求, 请求扩展隧道 的建立。 可选的, 隧道配置请求中还可以进一步携带 UE支持 PDN连接类 型。
此步骤中, 核心网网关通过在隧道配置请求消息中不携带 UE的地址, 来指示本地网关 UE支持多 PDN连接, 需要本地网关为 UE分配地址。 或 者可选的, 通过 UE支持的 PDN连接类型参数来指示本地网关。
步骤 1007b: 本地网关获知核心网网关没有为 UE分配地址, 据此得知 UE支持多 PDN连接, 需要本地网关为 UE分配地址。 可选的, 本地网关 也可以根据隧道配置请求中携带的 UE支持的 PDN连接类型来判断是否需 要为 UE分配地址。 本地网关可以保存 UE支持的 PDN连接类型。 本地网 关为 UE分配地址。
步骤 1008b: 本地网关创建用户上下文, 保存为 UE分配的地址。 本地 网关向核心网网关回应隧道配置响应, 其中携带为 UE分配的地址。
步骤 1009: 核心网网关向移动性管理实体回应 PDP上下文建立响应。 步骤 1010: 执行无线接入承载建立流程。
步骤 1011 : 移动性管理实体可能向核心网网关发送 PDP上下文更新请 求, 通知核心网网关修改后的 QoS参数; 核心网网关则可以向移动性管理 实体回应 PDP上下文更新响应, 以完成 PDP上下文更新。
步骤 1012: 移动性管理实体返回 PDP上下文激活响应消息给 UE。 本实施例中, UE支持的 PDN连接类型是在 PDP上下文建立时带给核 心网网关的; 基于此, 在附着流程中, UE 可以不携带该参数。 对于 UTRAN/GERAN系统, UE可以在附着流程中将自身支持的 PDN连接类型 通知给移动性管理实体, 由移动性管理实体保存该参数; 之后, 在 UE发起 PDP上下文激活过程, 并且 UE不再携带所述参数时, 可以由移动性管理 实体将保存的所述参数通知给核心网网关。
结合以上各流程, 可以将本发明实现地址分配的技术思路表示如图 11 所示。 参见图 11 , 图 11为本发明实现地址分配的流程简图, 该流程包括以 下步骤:
步骤 1110: 获取用于确定地址分配主体的 UE能力。
步骤 1120: 根据所获取的 UE能力, 确定为 UE分配地址的功能实体。 为了保证上述各流程能够顺利进行, 可以进行如图 12所示的设置。 参 见图 12, 图 12为本发明一实施例的实现地址分配的装置图, 该装置包括相 连的终端能力提供单元、 地址分配决策单元、 地址分配执行单元。
在具体应用时, 终端能力提供单元可以设置于 UE、 移动性管理实体等 功能实体中,能够向地址分配决策单元等有需要的功能实体提供 UE支持的 PDN连接类型等 UE能力。 地址分配决策单元可以设置于核心网网关等功 能实体中, 能够接收终端能力提供单元所提供的 UE支持的 PDN连接类型 等终端能力, 并据此确定为 UE分配地址的功能实体, 如: 核心网网关、 本 地网关等。
在核心网网关、本地网关等能够为 UE分配地址的功能实体中, 均可设 置地址分配执行单元。当地址分配决策单元确定了为 UE分配地址的功能实 体后,可以通知该功能实体中的地址分配执行单元为 UE分配地址,相应的 地址分配执行单元则可以根据收到的通知为 UE分配地址,进一步还可以将 分配的地址通知给 UE。
需要说明的是, 终端能力提供单元、 地址分配决策单元、 地址分配执 行单元中的两两之间, 可以连接有移动性管理实体等中间实体。 再有, 终 端能力提供单元可以在附着过程、 发起 PDN连接建立流程、 PDP上下文激 活等过程中提供 UE能力; 并且, UE能力的表现方式也可以如前述多种中 的一种。
上述各单元所能实现的操作内容已经在前述各流程中详细描述, 在此 不再赘述。
综上所述可见, 无论是方法还是装置, 本发明在分流网络中实现地址 分配的技术, 能够在分流网络中由恰当的主体实现合理、有效地 UE地址分 配, 有利于 UE顺利进行后续通信过程, 提高了用户满意度。
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, 凡在本发明的精神和原则之内所作的任何修改、 等同替换和改进 等, 均应包含在本发明的保护范围之内。

Claims

权利要求书
1、 在分流网络中实现地址分配的方法, 其特征在于, 该方法包括: 获取用于确定地址分配主体的终端 UE能力; 根据所获取的 UE能力, 确定为 UE分配地址的功能实体。
2、 根据权利要求 1所述的方法, 其特征在于, 获取所述 UE能力的方 法为:
在 UE的附着过程中, 提供 UE支持的分组数据网络 PDN连接类型; 或者,
在 PDN连接建立过程中, 提供 UE支持的 PDN连接类型; 或者, 在 PDP上下文激活过程中, 提供 UE支持的 PDN连接类型。
3、 根据权利要求 1所述的方法, 其特征在于, 所述 UE能力为 UE支 持的 PDN连接类型时, 所述确定为 UE分配地址的功能实体的过程包括: 检查 UE支持的 PDN连接类型, 如果 UE不支持多 PDN连接, 则确定 由核心网网关为 UE分配地址; 如果 UE支持多 PDN连接, 则确定由本地 网关为 UE分配地址。
4、 根据权利要求 3所述的方法, 其特征在于, 所述确定由本地网关为 UE分配地址的过程包括:
核心网网关指示本地网关为 UE分配地址; 或者,
核心网网关将 UE支持的 PDN连接类型发送给本地网关, 本地网关据 此确定由自身为 UE分配地址。
5、 根据权利要求 1至 4任一项所述的方法, 其特征在于, 该方法进一 步包括:
由已经确定的为 UE分配地址的所述功能实体, 为 UE分配地址。
6、 在分流网络中实现地址分配的装置, 其特征在于, 该装置包括终端 能力提供单元、 地址分配决策单元; 其中, 所述终端能力提供单元, 用于获取能够确定地址分配主体的 UE能力; 所述地址分配决策单元,用于根据所述终端能力提供单元所获取的 UE 能力, 确定为 UE分配地址的功能实体。
7、 根据权利要求 6所述的装置, 其特征在于, 所述终端能力提供单元 用于:
在 UE的附着过程中, 提供 UE支持的 PDN连接类型; 或者, 在 PDN连接建立过程中, 提供 UE支持的 PDN连接类型; 或者, 在 PDP上下文激活过程中, 提供 UE支持的 PDN连接类型。
8、 根据权利要求 6所述的装置, 其特征在于, 所述 UE能力为 UE支 持的 PDN连接类型时, 所述地址分配决策单元用于:
检查 UE支持的 PDN连接类型, 如果 UE不支持多 PDN连接, 则确定 由核心网网关为 UE分配地址; 如果 UE支持多 PDN连接, 则确定由本地 网关为 UE分配地址。
9、 根据权利要求 8所述的装置, 其特征在于, 所述地址分配决策单元 在确定由本地网关为 UE分配地址时, 用于:
指示本地网关为 UE分配地址; 或者,
将 UE支持的 PDN连接类型发送给本地网关, 通知本地网关据此确定 由自身为 UE分配地址。
10、 根据权利要求 6至 9任一项所述的装置, 其特征在于, 该装置进 一步包括地址分配执行单元,设置于已经确定的用于为 UE分配地址的功能 实体中, 该功能实体为本地网关或核心网网关;
所述地址分配执行单元, 用于为 UE分配地址。
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