WO2013097614A1 - 为ue分配ip地址的方法、系统及tnan、ue - Google Patents

为ue分配ip地址的方法、系统及tnan、ue Download PDF

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Publication number
WO2013097614A1
WO2013097614A1 PCT/CN2012/086558 CN2012086558W WO2013097614A1 WO 2013097614 A1 WO2013097614 A1 WO 2013097614A1 CN 2012086558 W CN2012086558 W CN 2012086558W WO 2013097614 A1 WO2013097614 A1 WO 2013097614A1
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Prior art keywords
address
address request
tnan
attribute
request message
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PCT/CN2012/086558
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English (en)
French (fr)
Inventor
刘国燕
朱春晖
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中兴通讯股份有限公司
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Publication of WO2013097614A1 publication Critical patent/WO2013097614A1/zh

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Classifications

    • 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

Definitions

  • the present invention relates to the field of mobile communications, and in particular, to a method, a system for assigning an IP address to a user equipment (UE), and a trusted non-3 GPP IP access network (TNAN), UE .
  • UE user equipment
  • TNAN trusted non-3 GPP IP access network
  • the Evolved Packet System (EPS) of the 3rd Generation Partnership Project (3GPP) is evolved by Evolved Universal Terrestrial Radio Access Network (E-UTRAN), mobile management.
  • a component Mobility Management Entity, MME
  • S-GW Serving Gateway
  • P-GW Packet Data Network Gateway
  • HSS Home Subscriber Server
  • FIG. 1 is a network structure diagram of the interworking between the 3GPP network and the non-3GPP network in the prior art. As shown in FIG. 1, the interworking between the EPS and the non-3GPP system is implemented through the S2a/b/c interface. The P-GW acts as an anchor between the 3GPP and the non-3GPP system.
  • non-3GPP system access is divided into untrusted non-3GPP access and trusted non-3GPP access; wherein, untrusted non-3GPP access requires evolved packet data gateway (Evolved Packet Data Gateway) , ePDG) is connected to the P-GW, the interface between the ePDG and the P-GW is S2b; the trusted non-3GPP access can be directly connected to the P-GW through the S2a interface, and the S2a interface uses the PMIP protocol for information exchange; in addition, the S2c interface Provides user plane-related control and mobility support between the UE and the P-GW.
  • Evolved Packet Data Gateway Evolved Packet Data Gateway
  • the supported mobility management protocol is Moblie IPv6 Support for Dual Stack Hosts and Routers (DSMIPv6), which is available. Untrusted non-3GPP and trusted non-3GPP access.
  • the Wireless Local Area Network can be used as a trusted non-3 GPP IP access network (TNAN) to access the evolved Evolved Packet Core (EPC).
  • EPC evolved Evolved Packet Core
  • the UE supports the process of accessing the EPC through the TNAN, as shown in FIG. 2 .
  • S2a Mobility based On GTP & WLAN access to EPC (SaMOG) is mainly to study the interconnection and interworking problem of WLAN as TNAN and UE accessing EPC through S2a interface.
  • the research program of the SaMOG project is mainly divided into a scheme that has no impact on the UE and a scheme that affects the UE.
  • the so-called UE-affected solution is that the UE can support the 3GPP-specific information such as the Access Point Name (APN) to the mobile core network. In particular, it can simultaneously support access to the EPC network and directly pass The TNAN local network service is offloaded. Therefore, the PDN GW needs to allocate an IP address to the UE.
  • the TNAN also assigns a local IP address to the UE.
  • the TDNAN receives the same DHCP message as an example.
  • the PDN GW allocates a UE to the UE.
  • steps 306-310 in FIG. 3 the specific steps of the TNAN for assigning a local IP address to the UE, refer to steps 303-305 in FIG. 3, which are specifically described as follows:
  • the UE requests the local IP address from the TNAN involves steps 303-305: the UE requests the TNAN to allocate an IP address through the DHCP message; if the UE is to be authenticated by the TNAN, the step may also occur before step 302;
  • the case where the UE requests the PDN GW to allocate an IP address to the mobile network involves steps 306-310: the UE forwards through the TNAN through the DHCP message, and requests the PDN GW of the 3GPP core network to allocate an IP address.
  • the UE sends two IP address request messages to the TNAN, as in steps 306 and 303. These two IP addresses request cancellation The following conditions may exist:
  • the two IP address request messages are the same message type, such as the same DHCP message or route request message, but the message sequence numbers are different;
  • the two IP address request messages are different, such as: one is a DHCP message and the other is a route request message.
  • the TNAN cannot determine which specific message is the UE requesting the TNAN to assign a local IP address to it, and which message is the UE triggering the TNAN requesting the PDN GW to allocate an IP for the UE.
  • the address is. Therefore, in the prior art, the TNAN cannot implement the foregoing determination, and further decides whether to locally assign an IP address to the UE or request the PDN GW to allocate an IP address to the UE, thereby affecting system stability.
  • the main purpose of the present invention is to provide a method, a system, and a TNAN, a UE for allocating an IP address to a UE.
  • the TNAN can decide whether to locally allocate an IP address for the UE or request the PDN GW to allocate an IP address for the UE, thereby improving System stability.
  • a method for allocating an IP address to a UE including:
  • the TNAN receives an IP address request message from the user equipment UE, the IP address request message containing or implicitly including an IP address request attribute;
  • the packet core network EPC requesting the evolution allocates an IP address to the UE, and then executes the decision result.
  • the IP address request message contains or implicitly includes an IP address request attribute as:
  • the type of the IP address request message implicitly indicates the IP address request attribute, different cancellation
  • the interest type corresponds to different IP address request attributes.
  • the IP address request message indicates an IP address request attribute by carrying an IP address request attribute flag.
  • the IP address request message implicitly indicates an IP address request attribute by not carrying an IP address request attribute flag.
  • the IP address requesting attribute is: supporting access to the EPC, and/or, supporting service offloading, where the preset routing policy is: allowing access to the EPC, and/or, allowing the service to be offloaded.
  • the TNAN makes a decision according to the IP address request attribute included or implicitly included in the IP address request message and a preset routing policy:
  • the IP address request attribute supports access to the EPC, and the routing policy allows access to the EPC, and the decision is made by the TNAN requesting the EPC to allocate an IP address to the UE;
  • the IP address request attribute supports the service offload, and the routing policy allows the service to be offloaded, and the decision is made by the TNAN to allocate an IP address to the UE.
  • the TNAN After the IP address request message is a route request message or a dynamic host configuration protocol (DHCP), the TNAN performs a decision result, and the method further includes:
  • the TNAN replies to the UE with a DHCP response message, and the message carries the negotiated IP address attribute while carrying the IP address.
  • the TNAN is a wireless local area network WLAN.
  • the pre-configured routing policy is configured locally by the TNAN or obtained from the HSS/AAA. If there is no pre-configured routing policy, the default routing policy supports the IP address requesting attribute carried by the UE.
  • a method for allocating an IP address to a UE including:
  • the UE sends an IP address request message to the TNAN, where the IP address request message includes or implicitly includes an IP address request attribute.
  • the IP address request message includes or implicitly includes an IP address request attribute: the type of the IP address request message implicitly indicates an IP address request attribute, and different message types correspond to different IP address request attributes,
  • the IP address request message indicates an IP address request attribute by carrying an IP address request attribute flag.
  • the IP address request message implicitly indicates an IP address request attribute by not carrying an IP address request attribute flag.
  • the IP address requesting attribute is: supporting access to the EPC, and/or, supporting service offloading, where the preset routing policy is: allowing access to the EPC, and/or, allowing the service to be offloaded.
  • the IP address request message is a route request message or a dynamic host configuration protocol (DHCP), and includes a receiving module, a decision module, and an IP address allocation module.
  • the receiving module is configured to receive an IP from the user equipment UE.
  • An address request message, the IP address request message includes or implicitly includes an IP address request attribute;
  • the decision module is configured to perform a decision according to an IP address request attribute that is received or implicitly included in the IP address request message received by the receiving module, and a preset routing policy, where the TNAN allocates an IP address to the UE. And/or, the packet core network EPC requested by the TNAN to request an IP address for the UE, and then notify the corresponding IP address allocation module and/or EPC;
  • the IP address allocation module is configured to allocate an IP address to the UE according to the notification of the decision module.
  • the IP address request message received by the receiving module includes or implicitly includes an IP address request attribute:
  • the type of the IP address request message implicitly indicates an IP address request attribute, and different message types correspond to different IP address request attributes. Or the IP address request message indicates an IP address request attribute by carrying an IP address request attribute flag.
  • the IP address request message implicitly indicates an IP address request attribute by not carrying an IP address request attribute flag.
  • the IP address request message received by the receiving module includes or implicitly includes an IP address request attribute: supporting access to the EPC, and/or, supporting service offloading,
  • the routing policy preset by the decision module is: allowing access to the EPC, and/or, allowing traffic to be offloaded.
  • the decision module makes a decision according to the IP address request attribute included in the IP address request message or implicitly included and a preset routing policy:
  • the IP address request attribute supports access to the EPC, and the routing policy allows access to the EPC, and the decision is made by the TNAN requesting the EPC to allocate an IP address to the UE;
  • the IP address request attribute supports the service offload, and the routing policy allows the service to be offloaded, and the decision is made by the TNAN to allocate an IP address to the UE.
  • the IP address request message received by the receiving module is a route request message or a DHCP message.
  • the TNAN further includes a sending module, configured to reply to the UE with a DHCPv6 response or a DHCPv4 response message, and the message carries the negotiated IP address attribute while carrying the IP address.
  • the TNAN is a WLAN.
  • the pre-configured routing policy is configured locally by the TNAN or obtained from the HSS/AAA. If there is no pre-configured routing policy, the default routing policy supports the IP address requesting attribute carried by the UE.
  • a UE including a sending module
  • the sending module is configured to send an IP address request message to the TNAN, where the IP address request message includes or implicitly includes an IP address request attribute.
  • the method, system, and TNAN, UE, and TNAN of the present invention receive an IP address request message from a UE, where the IP address request message includes or implicitly includes an IP address request attribute; and the TNAN is based on the IP address.
  • the request message includes or implicitly includes an IP address request attribute and a preset routing policy for making a decision, the decision is to assign an IP address to the UE by the TNAN, and/or, the TNAN requests the EPC to allocate an IP to the UE. Address, then execute the decision result.
  • the TNAN can decide whether to locally assign an IP address to the UE or request the PDN GW to allocate an IP address to the UE, thereby improving system stability.
  • FIG. 1 is a network structure diagram of interworking between a 3GPP network and a non-3GPP network in the prior art
  • FIG. 2 is a schematic diagram of a process in which a UE accesses an EPC through a TNAN in the prior art
  • FIG. 3 is a schematic diagram of a UE requesting a TNAN in the prior art. a local IP address, and a schematic diagram of a process for requesting the mobile network to assign an IP address to the PDN GW;
  • FIG. 4 is a schematic flowchart of a method for allocating an IP address for a UE according to the present invention
  • FIG. 5 is a schematic flowchart of an IP address allocation process according to Embodiment 1 of the present invention.
  • FIG. 6 is a schematic diagram of an IP address allocation process according to Embodiment 2 of the present invention. detailed description
  • the TNAN receives an IP address request message from the UE, the IP address request message includes or implicitly includes an IP address request attribute; and the TNAN includes or implicitly includes an IP according to the IP address request message.
  • the address request attribute and the preset routing policy are determined, the decision is made by the TNAN to allocate an IP address to the UE, and/or, the TNAN requests the EPC to allocate an IP address to the UE, and then the decision result is executed.
  • the present invention provides a specific solution for how to allocate an IP address to a UE in a scenario in which the UE supports the access to the EPC network and directly distributes the traffic through the local network.
  • FIG. 4 is a schematic flowchart of a method for allocating an IP address for a UE according to the present invention, as shown in FIG. 4, Methods include:
  • Step 401 The TNAN receives an IP address request message from the user equipment UE, where the IP address request message includes or implicitly includes an IP address request attribute.
  • the IP address request message includes or implicitly includes an IP address request attribute, which may be: the type of the IP address request message implicitly indicates an IP address request attribute, and different message types correspond to different IP address request attributes,
  • the IP address request message indicates an IP address request attribute by carrying an IP address request attribute flag.
  • the IP address request message implicitly indicates an IP address request attribute by not carrying an IP address request attribute flag.
  • the present invention may also indicate an IP address request attribute in other ways than the flag bit.
  • IP address request attribute may be: Supporting access to the EPC, and/or, supporting service offloading
  • routing policy may be: Allow access to the EPC, and/or, allow the service to be offloaded.
  • Step 402 The TNAN determines, according to the IP address request message that is included or implicitly included in the IP address request message, and a preset routing policy, where the TNAN allocates an IP address to the UE, and/or The TNAN requests the evolved packet core network EPC to assign an IP address to the UE.
  • the pre-configured routing policy can be locally configured by the TNAN or obtained from HSS/AAA. If there is no pre-configured routing policy, the default pre-set routing policy supports the IP address request attribute carried by the UE.
  • the step may specifically be: the IP address request attribute supports accessing the EPC, and the routing policy allows access to the EPC, and the decision is requested by the TNAN to allocate an IP address to the UE by the EPC;
  • the IP address request attribute supports the service offload, and the routing policy allows the service to be offloaded. Then, the TNAN allocates an IP address to the UE. Step 403: The TNAN performs a decision result.
  • the TNAN will inform the UE of the assigned IP address attribute, so that the UE encapsulates different IP addresses according to the data routing policy.
  • the IP address request message may be a route request message or a dynamic host configuration protocol DHCP message (such as a DHCPv4 or DHCPv6 message).
  • a dynamic host configuration protocol DHCP message such as a DHCPv4 or DHCPv6 message.
  • the method may further include: the TNAN replies to the UE with a DHCPv6 response or a DHCPv4 response message, where the message carries the IP address and also carries the negotiated IP address attribute. .
  • the present invention also correspondingly proposes a method for allocating an IP address to a UE, including:
  • the UE sends an IP address request message to the TNAN, where the IP address request message includes or implicitly includes an IP address request attribute.
  • the IP address request message includes or implicitly includes an IP address request attribute: the type of the IP address request message implicitly indicates an IP address request attribute, and different message types correspond to different IP address request attributes,
  • the IP address request message indicates an IP address request attribute by carrying an IP address request attribute flag.
  • the IP address request message implicitly indicates an IP address request attribute by not carrying an IP address request attribute flag.
  • the IP address request attribute is: supporting access to an EPC, and/or, supporting service offloading,
  • the preset routing policy is: allowing access to the EPC, and/or, allowing traffic to be offloaded.
  • the IP address request message is a route request message or a dynamic host configuration protocol (DHCP) message.
  • DHCP dynamic host configuration protocol
  • the present invention also correspondingly proposes a TNAN, including: a receiving module, a decision module, and an IP address allocation module;
  • the receiving module is configured to receive an IP address request message from the user equipment UE, where the IP address request message includes or implicitly includes an IP address request attribute;
  • the decision module is configured to perform a decision according to an IP address request attribute that is received or implicitly included in the IP address request message received by the receiving module, and a preset routing policy, where the TNAN allocates an IP address to the UE. And/or, the packet core network EPC requested by the TNAN to request an IP address for the UE, and then notify the corresponding IP address allocation module and/or EPC;
  • the IP address allocation module is configured to allocate an IP address to the UE according to the notification of the decision module.
  • the IP address request message received by the receiving module includes or implicitly includes an IP address request attribute:
  • the type of the IP address request message implicitly indicates an IP address request attribute, and different message types correspond to different IP address request attributes.
  • the IP address request message indicates an IP address request attribute by carrying an IP address request attribute flag.
  • the IP address request message implicitly indicates an IP address request attribute by not carrying an IP address request attribute flag.
  • the IP address request message received by the receiving module includes or implicitly includes an IP address request attribute: supporting access to the EPC, and/or, supporting service offloading,
  • the routing policy preset by the decision module is: allowing access to the EPC, and/or, allowing traffic to be offloaded.
  • the determining module determines, according to the IP address request attribute that is included or implicitly included in the IP address request message, and a preset routing policy to:
  • the IP address request attribute supports accessing the EPC, and the routing policy allows access to the EPC, and then the TNAN requests the EPC to allocate an IP address to the UE;
  • the IP address request attribute supports the service offload, and the routing policy allows the service to be offloaded. Then, the TNAN allocates an IP address to the UE.
  • the IP address request message received by the receiving module is a route request message or a DHCP message.
  • the TNAN further includes a sending module, configured to reply to the UE with a DHCPv6 response or a DHCPv4 response message, where the message carries the IP address and the negotiated IP address attribute.
  • a sending module configured to reply to the UE with a DHCPv6 response or a DHCPv4 response message, where the message carries the IP address and the negotiated IP address attribute.
  • the TNAN is a WLAN.
  • the pre-configured routing policy is configured locally by the TNAN or obtained from the HSS/AAA. If there is no pre-configured routing policy, the default routing policy supports the IP address requesting attribute carried by the UE.
  • the present invention also correspondingly proposes a UE, where the UE includes a sending module.
  • the sending module is configured to send an IP address request message to the TNAN, where the IP address request message includes or implicitly includes an IP address request attribute.
  • the TNAN when the TNAN allows the UE to access the EPC or the direct service is offloaded, when the TNAN receives the IP address request message (such as a DHCP address request message), the TNAN may first allocate one according to the deployment priority. The IP address is given to the UE, and when the IP address request message (such as a DHCP address request message) is received again, the remaining IP address is allocated to the UE.
  • the IP address request message such as a DHCP address request message
  • the TNAN comprehensively decides the IP address allocation mode according to the IP address request attribute and the local routing policy carried by the UE when the UE supports access to the EPC network or directly offloads the local network service.
  • the DHCP message is taken as an example.
  • FIG. 5 is a schematic diagram of an IP address allocation process according to Embodiment 1 of the present invention. As shown in FIG. 5, the method includes: Step 501: The UE performs a non-3GPP specific process with the TNAN.
  • Step 502 The TNAN, as an Extensible Authentication Protocol (EAP) Authenticator, triggers an EAP authentication process to the UE.
  • EAP Extensible Authentication Protocol
  • Step 503 If the TNAN receives the DHCPv6 request message or the DHCPv4 discovery message, obtain the IP address request attribute from the message, and the TNAN requests the attribute and the locally saved routing policy according to the IP address carried by the UE, and the integrated decision requests the EPC to allocate the IP to the UE. The address is still requested by the TNAN to locally assign an IP address to the UE.
  • the locally saved routing policy (that is, the preset routing policy) can be locally configured by the TNAN or obtained from HSS/AAA. If there is no locally saved routing policy, the default locally saved routing policy supports the IP address request attribute carried by the UE.
  • the IP address request attribute may be specifically expressed as: 1 indicates that the request TNAN locally allocates an IP address to the UE, and 0 indicates that the EPC can be accessed, and the TNAN requests the EPC to allocate an IP address to the UE, and the specific value is not limited to this type. the way.
  • This information may be extended or newly extended as an option in the IP address option in the DHCP message.
  • the TNAN locally saved routing policy can determine whether to allow access to the EPC, including: allowing only traffic splitting, allowing traffic splitting and accessing EPC, and allowing only access to EPC. This may be the result of the UE's request to allow access to the EPC and the network side to allow access to the EPC. It may also be the local configuration result of the TNAN. If the access to the EPC is allowed, the TNAN shall trigger the request to the EPC. The UE assigns an IP address.
  • the routing policy on the network side takes precedence.
  • the TNAN performs the following specific operations according to the comprehensive consideration of the IP address request attribute and the locally saved routing policy carried by the UE:
  • mode 1 is executed, and the TNAN locally allocates an IP address to the UE; If the result of the TNAN decision is to allow access to the EPC, then mode 2 is executed, and the TNAN triggers an EPC request to allocate an IP address to the UE;
  • the TNAN locally allocates an IP address to the UE, and the TNAN triggers an EPC request to allocate an IP address to the UE.
  • Step 504 The TNAN obtains the corresponding IP address according to the IP address allocation process, and returns a DHCPv6 advertisement or a DHCPv4 providing message to the UE.
  • the message carries the IP address and the negotiated IP address attribute, which represents the IP address. Allocation.
  • the UE After receiving the message, the UE saves the IP address and the negotiated IP address request attribute, and needs to send subsequent data packets.
  • Step 505 The UE and the TNAN complete the DHCPv6 request and reply process or the DHCPv4 request and confirmation process to confirm the validity of the assigned IP address. If the negotiated IP address request attribute is not carried in step 504, it is carried in the DHCPv6 reply message or the DHCPv4 acknowledgement message in this step.
  • the UE sends a DHCP message and a route request message respectively, where the DHCP message requests the TNAN to locally assign an IP address on behalf of the UE, and the route request message triggers the TNAN to request the PDN GW to allocate an IP address for the UE, and vice versa.
  • the TNAN judges according to the IP address request attribute implicitly indicated by the IP address request message type, and combines the locally saved routing policy, and the comprehensive decision requests the EPC to allocate an IP address to the UE or requests the TNAN to locally allocate an IP address to the UE.
  • the difference between the method and the flow of FIG. 5 is that the steps 503 and 505 do not need to carry the information of the IP address attribute, and the TNAN distinguishes the decision by the message type. Similarly, the UE distinguishes the received IP address according to the message type.
  • the TNAN decides the IP address allocation mode according to the local routing policy when the UE supports the access to the EPC network and the traffic is directly transmitted through the local network.
  • the TNAN allows the UE to access the EPC or the direct traffic splitting
  • the TNAN receives the DHCP address request message, it also allocates two IP addresses to the UE, respectively, and an IP address assigned by the TNAN to the UE locally, and The TNAN triggers an EPC request for an IP address assigned to the UE.
  • the difference from the embodiment 1 is that the TNAN does not need to be based on the UE's request for the IP address attribute.
  • FIG. 6 is a schematic diagram of the IP address allocation process according to the second embodiment of the present invention. Taking a DHCP message as an example, the embodiment is also applicable to routing. Request message, as shown in Figure 6, the method includes:
  • Steps 601-602 Same steps 501-502.
  • Step 603 If the TNAN receives the DHCPv6 request message or the DHCPv4 discovery message, the TNAN requests the EPC to allocate an IP address to the UE according to the locally saved routing policy or requests the TNAN to locally allocate an IP address for the UE.
  • Embodiment 1 For the specific policy negotiation principle, refer to the corresponding description of Embodiment 1.
  • the TNAN performs the following specific operations according to the locally saved routing policy:
  • the TNAN locally assigns an IP address to the UE
  • the TNAN triggers an EPC request to allocate an IP address to the UE
  • the execution manners 1 and 2 are respectively assigned an IP address by the TNAN to the UE, and the TNAN triggers an EPC request to allocate an IP address to the UE.
  • Step 604 The TNAN obtains the corresponding IP address according to the foregoing IP address allocation process, and returns a DHCPv6 advertisement or a DHCPv4 providing message to the UE.
  • the message carries the IP address and the negotiated IP address request attribute, which represents the IP address. origin of. If the TNAN obtains two IP addresses, the DHCP advertisement message needs to carry two IP addresses and corresponding negotiated IP address attributes. After receiving the message, the UE saves the IP address and negotiates The IP address request attribute is required for subsequent data packet transmission.
  • Step 605 The UE and the TNAN complete the DHCPv6 request and reply process or the DHCPv4 request and confirmation process to confirm the validity of the assigned IP address. If the negotiated IP address request attribute is not carried in step 604, it is carried in the DHCPv6 reply message or the DHCPv4 acknowledgement message in this step.
  • the above embodiment may be based on establishing a GTP tunnel between the non-3GPP access network element and the PDN GW.
  • the present invention is also applicable to the establishment of a PMIP tunnel, and the corresponding message may be replaced, for example: proxy binding update message replacement
  • the session request message is created, and the proxy binding acknowledgement message replaces the create session response message.
  • the parameters that need to be added also apply to the PMIP message.

Abstract

本发明公开了一种为UE分配IP地址的方法,包括:TNAN接收来自UE的IP地址请求消息,IP地址请求消息包含或者隐式包含IP地址请求属性;TNAN根据所述IP地址请求消息包含或者隐式包含的IP地址请求属性和预先设置的路由策略进行决策,决策由所述TNAN为所述UE分配IP地址,和/或,由TNAN请求EPC为所述UE分配IP地址,之后执行决策结果。本发明还相应地公开了一种为UE分配IP地址的系统及TNAN、UE。通过本发明,TNAN能够决策是本地为UE分配IP地址,还是请求PDN GW为UE配IP地址,从而提高系统稳定性。

Description

为 UE分配 IP地址的方法、 系统及 TNAN、 UE 技术领域
本发明涉及移动通信领域,尤其涉及一种为用户设备 ( User Equipment, UE ) 分配 IP 地址的方法、 系统及可信任的非 3GPP 接入网络 (trusted non-3 GPP IP access network, TNAN )、 UE。 背景技术
第三代合作伙伴计划 ( 3rd Generation Partnership Project, 3GPP ) 的演 进的分组系统( Evolved Packet System, EPS ) 由演进的通用地面无线接入 网 ( Evolved Universal Terrestrial Radio Access Network, E-UTRAN )、 移动 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 )和归 属用户服务器( Home Subscriber Server, HSS )组成。
EPS支持与非 3GPP系统的互通, 图 1为现有技术中, 3GPP网络与非 3GPP网络互通的网络结构图, 如图 1所示, EPS与非 3GPP系统的互通通 过 S2a/b/c接口实现, P-GW作为 3GPP与非 3GPP系统间的锚点。 在 EPS 的系统架构图中,非 3GPP系统接入被分为不可信任非 3GPP接入和可信任 非 3GPP接入; 其中, 不可信任非 3GPP接入需经过演进的分组数据网关 ( Evolved Packet Data Gateway, ePDG )与 P-GW相连, ePDG与 P-GW间 的接口为 S2b;可信任非 3GPP接入可直接通过 S2a接口与 P-GW连接, S2a 接口采用 PMIP协议进行信息交互; 另外, S2c接口提供了 UE与 P-GW之 间的用户面相关的控制和移动性支持, 其支持的移动性管理协议为支持双 栈的移动 IPv6 ( Moblie IPv6 Support for Dual Stack Hosts and Routers, DSMIPv6), 其可用于不可信任非 3GPP和可信任非 3GPP接入。 无线局域网络( Wireless Local Area Network , WLAN )可以作为可信 任的非 3GPP接入网络( trusted non-3 GPP IP access network, TNAN )接入 演进的分组核心网 (Evolved Packet Core, EPC ), 现有技术中, UE支持通 过 TNAN接入 EPC的流程, 如图 2所示。
目前, 对于 S2b、 S2c接口的流程和策略互通的研究很多, 而对于 S2a 接口的研究很少。 S2a移动性研究 ( Study on S2a Mobility based On GTP & WLAN access to EPC, SaMOG )课题主要是研究 WLAN作为 TNAN, UE 通过 S2a接口接入 EPC的互连互通问题。
SaMOG课题的研究方案主要分为对 UE没有影响的方案和对 UE有影 响的方案。 所谓对 UE有影响的方案, 即是 UE可以支持传递请求的接入点 名称(Access Point Name, APN )等 3GPP特有的信息给移动核心网, 尤其, 其可以同时支持接入 EPC网络和直接通过 TNAN本地网络业务分流,因此, 这不仅需要 PDN GW为 UE分配一个 IP地址, 而且, TNAN也要为 UE分 配一个本地 IP地址, 以 TNAN收到相同的 DHCP消息为例 , PDN GW为 UE分配一个 IP地址的具体步驟, 可参见图 3中的步驟 306-310; TNAN为 UE分配一个本地 IP地址的具体步驟, 可参见图 3中的步驟 303-305, 具体 描述如下:
UE向 TNAN请求本地 IP地址的情况涉及步驟 303-305: UE通过 DHCP 消息 , 向 TNAN请求分配 IP地址; 如果 UE要经过 TNAN的认证的话, 该 步驟也可能在步驟 302之前发生;
UE 向 PDN GW 请求移动网络为其分配 IP 地址的情况涉及步驟 306-310: UE通过 DHCP消息 ,经 TNAN转发,向 3GPP核心网的 PDN GW 请求分配 IP地址。
如果 UE同时需要这两种 IP地址分配方式的话, UE会分别向 TNAN 发送两个 IP地址请求消息, 如步驟 306和步驟 303。 这两个 IP地址请求消 息可能存在下列情况:
1 ) 两个 IP地址请求消息为相同的消息类型, 比如为相同的 DHCP消 息或者路由请求消息, 但是消息序号不同;
2 ) 两个 IP地址请求消息不同, 比如: 一个为 DHCP消息, 另一个为 路由请求消息。
这时, TNAN如果收到上述两种情况的 IP地址请求消息的话, TNAN 无法判断具体哪个消息是 UE请求 TNAN为其分配一个本地 IP地址, 哪个 消息是 UE触发 TNAN请求 PDN GW为 UE分配一个 IP地址, 所以 , 在现 有技术中, TNAN无法实现上述判断, 并进一步决策是本地为 UE分配 IP 地址, 还是请求 PDN GW为 UE分配 IP地址, 从而影响系统稳定性。 发明内容
有鉴于此,本发明的主要目的在于提供一种为 UE分配 IP地址的方法、 系统及 TNAN、 UE, TNAN能够决策是本地为 UE分配 IP地址, 还是请求 PDN GW为 UE分配 IP地址, 从而提高系统稳定性。
为达到上述目的, 本发明的技术方案是这样实现的:
一种为 UE分配 IP地址的方法, 包括:
可信任的非第三代合作伙伴计划接入网络 TNAN接收来自用户设备 UE的 IP地址请求消息,所述 IP地址请求消息包含或者隐式包含 IP地址请 求属性;
所述 TNAN根据所述 IP地址请求消息包含或者隐式包含的 IP地址请 求属性和预先设置的路由策略进行决策, 决策由所述 TNAN为所述 UE分 配 IP地址, 和 /或, 由所述 TNAN请求演进的分组核心网 EPC为所述 UE 分配 IP地址, 之后执行决策结果。
所述 IP地址请求消息包含或者隐式包含 IP地址请求属性为:
通过所述 IP地址请求消息的类型隐含指示 IP地址请求属性,不同的消 息类型对应不同的 IP地址请求属性,
或者, 所述 IP地址请求消息通过携带 IP地址请求属性标志位指示 IP 地址请求属性,
或者,所述 IP地址请求消息通过不携带 IP地址请求属性标志位隐含指 示 IP地址请求属性。
所述 IP地址请求属性为: 支持接入 EPC, 和 /或, 支持业务分流, 所述预先设置的路由策略为: 允许接入 EPC, 和 /或, 允许业务分流。 所述 TNAN根据所述 IP地址请求消息包含或者隐式包含的 IP地址请 求属性和预先设置的路由策略进行决策为:
IP地址请求属性支持接入 EPC, 且路由策略允许接入 EPC, 则决策由 所述 TNAN请求 EPC为所述 UE分配 IP地址;
IP地址请求属性支持业务分流, 且路由策略允许业务分流, 则决策由 所述 TNAN为所述 UE分配 IP地址。
所述 IP地址请求消息为路由请求消息或动态主机配置协议 DHCP 消 所述 TNAN执行决策结果之后, 该方法还包括:
所述 TNAN向所述 UE回复 DHCP响应消息,该消息在携带 IP地址的 同时 , 也携带协商的 IP地址属性。
所述 TNAN为无线局域网络 WLAN。
所述预先设置的路由策略由 TNAN本地配置, 或者从 HSS/AAA获取, 如果没有预先设置的路由策略的话, 则默认为预先设置的路由策略支持 UE 携带的 IP地址请求属性。
一种为 UE分配 IP地址的方法, 包括:
UE向 TNAN发送 IP地址请求消息, 其中, 所述 IP地址请求消息包含 或者隐式包含 IP地址请求属性。 所述 IP地址请求消息包含或者隐式包含 IP地址请求属性为: 通过所述 IP地址请求消息的类型隐含指示 IP地址请求属性,不同的消 息类型对应不同的 IP地址请求属性,
或者, 所述 IP地址请求消息通过携带 IP地址请求属性标志位指示 IP 地址请求属性,
或者,所述 IP地址请求消息通过不携带 IP地址请求属性标志位隐含指 示 IP地址请求属性。
所述 IP地址请求属性为: 支持接入 EPC, 和 /或, 支持业务分流, 所述预先设置的路由策略为: 允许接入 EPC, 和 /或, 允许业务分流。 所述 IP地址请求消息为路由请求消息或动态主机配置协议 DHCP 消 一种 TNAN, 包括: 接收模块、 决策模块和 IP地址分配模块; 其中, 所述接收模块, 设置为接收来自用户设备 UE的 IP地址请求消息, 所 述 IP地址请求消息包含或者隐式包含 IP地址请求属性;
所述决策模块, 设置为根据所述接收模块接收的 IP地址请求消息包含 或者隐式包含的 IP地址请求属性和预先设置的路由策略进行决策, 决策由 所述 TNAN为所述 UE分配 IP地址 , 和 /或 , 由所述 TNAN请求演进的分 组核心网 EPC为所述 UE分配 IP地址, 之后通知相应的 IP地址分配模块 和 /或 EPC;
所述 IP地址分配模块, 设置为根据所述决策模块的通知, 为所述 UE 分配 IP地址。
所述接收模块接收的 IP地址请求消息包含或者隐式包含 IP地址请求属 性为:
通过所述 IP地址请求消息的类型隐含指示 IP地址请求属性,不同的消 息类型对应不同的 IP地址请求属性, 或者, 所述 IP地址请求消息通过携带 IP地址请求属性标志位指示 IP 地址请求属性,
或者,所述 IP地址请求消息通过不携带 IP地址请求属性标志位隐含指 示 IP地址请求属性。
所述接收模块接收的 IP地址请求消息包含或者隐式包含的 IP地址请求 属性为: 支持接入 EPC, 和 /或, 支持业务分流,
所述决策模块预先设置的路由策略为: 允许接入 EPC, 和 /或, 允许业 务分流。
所述决策模块根据所述 IP地址请求消息包含或者隐式包含的 IP地址请 求属性和预先设置的路由策略进行决策为:
IP地址请求属性支持接入 EPC, 且路由策略允许接入 EPC, 则决策由 所述 TNAN请求 EPC为所述 UE分配 IP地址;
IP地址请求属性支持业务分流, 且路由策略允许业务分流, 则决策由 所述 TNAN为所述 UE分配 IP地址。
所述接收模块接收的 IP地址请求消息为路由请求消息或 DHCP消息。 所述 TNAN还包括发送模块, 设置为向所述 UE回复 DHCPv6响应或 者 DHCPv4响应消息, 该消息在携带 IP地址的同时, 也携带协商的 IP地 址属性。
所述 TNAN为 WLAN。
所述预先设置的路由策略由 TNAN本地配置, 或者从 HSS/AAA获取, 如果没有预先设置的路由策略的话, 则默认为预先设置的路由策略支持 UE 携带的 IP地址请求属性。
一种 UE, 包括发送模块,
所述发送模块, 设置为向 TNAN发送 IP地址请求消息, 其中, 所述 IP 地址请求消息包含或者隐式包含 IP地址请求属性。 本发明为 UE分配 IP地址的方法、 系统及 TNAN、 UE , TNAN接收 来自 UE的 IP地址请求消息, 所述 IP地址请求消息包含或者隐式包含 IP 地址请求属性;所述 TNAN根据所述 IP地址请求消息包含或者隐式包含的 IP地址请求属性和预先设置的路由策略进行决策, 决策由所述 TNAN为所 述 UE分配 IP地址 , 和 /或 , 由所述 TNAN请求 EPC为所述 UE分配 IP地 址, 之后执行决策结果。 通过本发明, TNAN能够决策是本地为 UE分配 IP地址, 还是请求 PDN GW为 UE分配 IP地址, 从而提高系统稳定性。 附图说明
图 1为现有技术中, 3GPP网络与非 3GPP网络互通的网络结构图; 图 2为现有技术中, UE通过 TNAN接入 EPC的流程示意图; 图 3为现有技术中, UE向 TNAN请求本地 IP地址、 以及向 PDN GW 请求移动网络为其分配 IP地址的流程示意图;
图 4为本发明为 UE分配 IP地址的方法流程示意图;
图 5为本发明实施例 1所述的 IP地址分配流程示意图;
图 6为本发明实施例 2所述的 IP地址分配流程示意图。 具体实施方式
本发明的基本思想是: TNAN接收来自 UE的 IP地址请求消息, 所述 IP地址请求消息包含或者隐式包含 IP地址请求属性;所述 TNAN根据所述 IP地址请求消息包含或者隐式包含的 IP地址请求属性和预先设置的路由策 略进行决策, 决策由所述 TNAN为所述 UE分配 IP地址, 和 /或, 由所述 TNAN请求 EPC为所述 UE分配 IP地址, 之后执行决策结果。
本发明针对 UE同时支持接入 EPC网络和直接通过本地网络业务分流 的场景下, 如何为 UE分配 IP地址, 给出具体的解决方案。
图 4为本发明为 UE分配 IP地址的方法流程示意图, 如图 4所示, 该 方法包括:
步驟 401: TNAN接收来自用户设备 UE的 IP地址请求消息, 所述 IP 地址请求消息包含或者隐式包含 IP地址请求属性。
这里,所述 IP地址请求消息包含或者隐式包含 IP地址请求属性可以为: 通过所述 IP地址请求消息的类型隐含指示 IP地址请求属性,不同的消 息类型对应不同的 IP地址请求属性,
或者, 所述 IP地址请求消息通过携带 IP地址请求属性标志位指示 IP 地址请求属性,
或者,所述 IP地址请求消息通过不携带 IP地址请求属性标志位隐含指 示 IP地址请求属性。
需要说明的是, 本发明并也可以采用标志位之外的其他方式指示 IP地 址请求属性。
需要说明的是, IP地址请求属性可以为: 支持接入 EPC, 和 /或, 支持 业务分流, 路由策略可以为: 允许接入 EPC, 和 /或, 允许业务分流。
步驟 402: 所述 TNAN根据所述 IP地址请求消息包含或者隐式包含的 IP地址请求属性和预先设置的路由策略进行决策, 决策由所述 TNAN为所 述 UE分配 IP地址 , 和 /或 , 由所述 TNAN请求演进的分组核心网 EPC为 所述 UE分配 IP地址。
其中, 预先设置的路由策略可以为 TNAN 本地配置的, 或者从 HSS/AAA等获取。 如果没有预先设置的路由策略的话, 则默认为预先设置 的路由策略支持 UE携带的 IP地址请求属性。
该步驟具体可以为: IP地址请求属性支持接入 EPC , 且路由策略允许 接入 EPC, 则决策由所述 TNAN请求 EPC为所述 UE分配 IP地址;
IP地址请求属性支持业务分流, 且路由策略允许业务分流, 则决策由 所述 TNAN为所述 UE分配 IP地址。 步驟 403: 所述 TNAN执行决策结果。
需要说明的是, TNAN或 EPC为 UE分配 IP地址后, TNAN会将分配 的 IP地址属性告诉 UE, 以供 UE根据数据路由策略, 封装不同的 IP地址。
本发明中, IP地址请求消息可以为路由请求消息或动态主机配置协议 DHCP消息 (如 DHCPv4或者 DHCPv6消息)。
需要说明的是, 所述 TNAN执行决策结果之后, 该方法还可以包括: 所述 TNAN向所述 UE回复 DHCPv6响应或者 DHCPv4响应消息 , 该消息 在携带 IP地址的同时, 也携带协商的 IP地址属性。
本发明还相应地提出了一种为 UE分配 IP地址的方法, 包括:
UE向 TNAN发送 IP地址请求消息, 其中, 所述 IP地址请求消息包含 或者隐式包含 IP地址请求属性。
可选的, 所述 IP地址请求消息包含或者隐式包含 IP地址请求属性为: 通过所述 IP地址请求消息的类型隐含指示 IP地址请求属性,不同的消 息类型对应不同的 IP地址请求属性,
或者, 所述 IP地址请求消息通过携带 IP地址请求属性标志位指示 IP 地址请求属性,
或者,所述 IP地址请求消息通过不携带 IP地址请求属性标志位隐含指 示 IP地址请求属性。
可选的, 所述 IP地址请求属性为: 支持接入 EPC, 和 /或, 支持业务分 流,
所述预先设置的路由策略为: 允许接入 EPC, 和 /或, 允许业务分流。 可选的, 所述 IP地址请求消息为路由请求消息或动态主机配置协议 DHCP消息。
本发明还相应地提出了一种 TNAN, 包括: 接收模块、 决策模块和 IP 地址分配模块; 其中, 所述接收模块, 设置为接收来自用户设备 UE的 IP地址请求消息, 所 述 IP地址请求消息包含或者隐式包含 IP地址请求属性;
所述决策模块, 设置为根据所述接收模块接收的 IP地址请求消息包含 或者隐式包含的 IP地址请求属性和预先设置的路由策略进行决策, 决策由 所述 TNAN为所述 UE分配 IP地址 , 和 /或 , 由所述 TNAN请求演进的分 组核心网 EPC为所述 UE分配 IP地址, 之后通知相应的 IP地址分配模块 和 /或 EPC;
所述 IP地址分配模块, 设置为根据所述决策模块的通知, 为所述 UE 分配 IP地址。
可选的,所述接收模块接收的 IP地址请求消息包含或者隐式包含 IP地 址请求属性为:
通过所述 IP地址请求消息的类型隐含指示 IP地址请求属性,不同的消 息类型对应不同的 IP地址请求属性,
或者, 所述 IP地址请求消息通过携带 IP地址请求属性标志位指示 IP 地址请求属性,
或者,所述 IP地址请求消息通过不携带 IP地址请求属性标志位隐含指 示 IP地址请求属性。
可选的, 所述接收模块接收的 IP地址请求消息包含或者隐式包含的 IP 地址请求属性为: 支持接入 EPC, 和 /或, 支持业务分流,
所述决策模块预先设置的路由策略为: 允许接入 EPC, 和 /或, 允许业 务分流。
可选的, 所述决策模块根据所述 IP地址请求消息包含或者隐式包含的 IP地址请求属性和预先设置的路由策略进行决策为:
IP地址请求属性支持接入 EPC, 且路由策略允许接入 EPC, 则决策由 所述 TNAN请求 EPC为所述 UE分配 IP地址; IP地址请求属性支持业务分流, 且路由策略允许业务分流, 则决策由 所述 TNAN为所述 UE分配 IP地址。
可选的, 所述接收模块接收的 IP 地址请求消息为路由请求消息或 DHCP消息。
可选的,所述 TNAN还包括发送模块,设置为向所述 UE回复 DHCPv6 响应或者 DHCPv4响应消息, 该消息在携带 IP地址的同时, 也携带协商的 IP地址属性。
可选的 , 所述 TNAN为 WLAN。
可选的, 所述预先设置的路由策略由 TNAN 本地配置, 或者从 HSS/AAA获取, 如果没有预先设置的路由策略的话, 则默认为预先设置的 路由策略支持 UE携带的 IP地址请求属性。
本发明还相应地提出了一种 UE, 该 UE包括发送模块,
所述发送模块, 设置为向 TNAN发送 IP地址请求消息, 其中, 所述 IP 地址请求消息包含或者隐式包含 IP地址请求属性。
需要说明的是, TNAN允许 UE即可以接入 EPC, 也可以直接业务分 流的情况下 , TNAN收到 IP地址请求消息 (如 DHCP地址请求消息 ) 时 , 也可以先根据部署优先级, 分配其中一个 IP地址给 UE, 后续再次收到 IP 地址请求消息(如 DHCP地址请求消息) 时, 分配剩下的一个 IP地址给 UE。
下面结合具体实施例对本发明的技术方案作进一步详细说明。 实施例 1
该实施例中, 主要是描述 UE支持接入 EPC网络或直接通过本地网络 业务分流时, TNAN根据 UE携带的 IP地址请求属性和本地的路由策略, 综合决策 IP地址分配方式。 以 DHCP消息为例来说明, 图 5为本发明实施 例 1所述的 IP地址分配流程示意图, 如图 5所示, 该方法包括: 步驟 501 : UE与 TNAN执行非 3GPP特有的流程;
步驟 502: TNAN作为可扩展的认证协议 ( Extensible Authentication Protocol, EAP )认证者, 会向 UE触发 EAP认证流程。
步驟 503: 如果 TNAN收到 DHCPv6请求消息或者 DHCPv4发现消息 的话, 从消息中获取 IP地址请求属性, TNAN根据 UE携带的 IP地址请求 属性和本地保存的路由策略, 综合决策向 EPC请求为 UE分配 IP地址还是 请求 TNAN本地为 UE分配 IP地址。
其中, 本地保存的路由策略(即预先设置的路由策略)可以为 TNAN 本地配置的,或者从 HSS/AAA等获取。如果没有本地保存的路由策略的话, 则默认为本地保存的路由策略支持 UE携带的 IP地址请求属性。
其中, IP地址请求属性具体可以表示为, 1代表请求 TNAN本地为 UE 分配 IP地址, 0代表可以接入 EPC, 则由 TNAN向 EPC请求为 UE分配 IP 地址, 具体如何取值不限制这一种方式。 该信息可能作为 DHCP消息中的 IP地址选项中进行扩展或者新扩展一个选项。
TNAN本地保存的路由策略可以为决定是否允许接入 EPC,具体包括: 只允许业务分流、 允许业务分流和接入 EPC、 以及只允许接入 EPC三种中 的任意一种。 这可能是 UE请求的是否允许接入 EPC和网络侧的是否允许 接入 EPC的共同协商结果, 也可能是 TNAN本地的配置结果; 如果允许接 入 EPC的话, 则代表 TNAN要触发向 EPC请求为 UE分配 IP地址。
如果 UE携带的 IP地址请求属性与 TNAN本地保存的路由策略不一致 的话, 则以网络侧的路由策略优先。
TNAN根据 UE携带的 IP地址请求属性和本地保存的路由策略的综合 考虑, 执行下面的具体操作:
如果 TNAN 决策的结果为允许业务分流的话, 那么执行方式 1 , 由 TNAN本地为 UE分配 IP地址; 如果 TNAN决策的结果为允许接入 EPC 的话, 那么执行方式 2, 由 TNAN触发向 EPC请求为 UE分配 IP地址;
如果 TNAN决策的结果为允许业务分流且允许接入 EPC的话,那么执 行方式 1和方式 2, 由 TNAN本地为 UE分配 IP地址, 并由 TNAN触发向 EPC请求为 UE分配 IP地址。
步驟 504: TNAN根据上述的 IP地址分配流程获取相应的 IP地址, 向 UE回复 DHCPv6通告或者 DHCPv4提供消息, 该消息中在携带 IP地址的 同时, 也携带协商的 IP地址属性, 代表该 IP地址的分配方式。 UE收到该 消息后,保存该 IP地址和协商的 IP地址请求属性, 为后续数据报文发送需 要。
步驟 505: UE和 TNAN完成 DHCPv6请求和回答流程或者 DHCPv4 请求和确认流程, 以确认被分配的 IP地址有效性。 如果步驟 504中, 没有 携带协商的 IP地址请求属性的话, 则在该步驟的 DHCPv6 回答消息或者 DHCPv4确认消息中携带。
可选地, UE分别发送 DHCP消息和路由请求消息, 其中, DHCP消息 代表 UE请求 TNAN为其本地分配 IP地址 , 而路由请求消息代表 UE触发 TNAN请求 PDN GW为其分配 IP地址, 反之亦然。 这时, TNAN根据 IP 地址请求消息类型隐含指示的 IP地址请求属性来判断, 并结合本地保存的 路由策略,综合决策向 EPC请求为 UE分配 IP地址还是请求 TNAN本地为 UE分配 IP地址。 这种方式与图 5的流程区别在于, 步驟 503和 505不需 要携带 IP地址属性的信息, TNAN通过消息类型来区分决策, 同样, UE 根据消息类型来区分收到的 IP地址。
实施例 2
该实施例中, 主要是描述 UE同时支持接入 EPC网络和直接通过本地 网络业务分流时, TNAN根据本地的路由策略, 决策 IP地址分配方式。 当 TNAN允许 UE即可以接入 EPC, 也可以直接业务分流的情况时, TNAN 收到 DHCP地址请求消息时 , 同时分配两个 IP地址给 UE , 分别由 TNAN 本地为 UE分配的一个 IP地址,和由 TNAN触发向 EPC请求为 UE分配的 一个 IP地址。与实施例 1 的区别在于 , TNAN不需要根据 UE请求 IP地址 属性的意愿, 图 6为本发明实施例 2所述的 IP地址分配流程示意图, 以 DHCP消息为例, 该实施例同样适用于路由请求消息, 如图 6所示, 该方 法包括:
步驟 601-602: 同步驟 501-502。
步驟 603: 如果 TNAN收到 DHCPv6请求消息或者 DHCPv4发现消息 的话, TNAN根据本地保存的路由策略, 综合决策向 EPC请求为 UE分配 IP地址还是请求 TNAN本地为 UE分配 IP地址。
具体的策略协商原则参见实施例 1的相应描述。
TNAN根据本地保存的路由策略, 执行下面的具体操作:
如果 TNAN本地保存的路由策略为允许业务分流的话, 那么执行方式
1 , 由 TNAN本地为 UE分配 IP地址;
如果 TNAN本地保存的路由策略为允许接入 EPC的话,那么执行方式
2, 由 TNAN触发向 EPC请求为 UE分配 IP地址;
如果 TNAN本地保存的路由策略为允许接入 EPC和业务分流的话,那 么执行方式 1和 2,分别由 TNAN本地为 UE分配一个 IP地址,和由 TNAN 触发向 EPC请求为 UE分配一个 IP地址。
步驟 604: TNAN根据上述的 IP地址分配流程获取相应的 IP地址, 向 UE回复 DHCPv6通告或者 DHCPv4提供消息, 该消息中在携带 IP地址的 同时, 也携带协商的 IP地址请求属性, 代表该 IP地址的来源。 如果 TNAN 获取两个 IP地址的话, 那么在 DHCP通告消息中, 需要携带两个 IP地址 和相应的协商的 IP地址属性。 UE收到该消息后, 保存该 IP地址和协商的 IP地址请求属性, 为后续数据报文发送需要。
步驟 605: UE和 TNAN完成 DHCPv6请求和回答流程或者 DHCPv4 请求和确认流程, 以确认被分配的 IP地址有效性。 如果步驟 604中, 没有 携带协商的 IP地址请求属性的话, 则在该步驟的 DHCPv6 回答消息或者 DHCPv4确认消息中携带。
以上实施例可以基于在非 3GPP接入网网元和 PDN GW之间建立的是 GTP隧道, 本发明也适用于 PMIP隧道的建立, 相应的消息进行替换即可, 比如: 代理绑定更新消息替换创建会话请求消息, 代理绑定确认消息替换 创建会话响应消息, 需要增加的参数也同样适用于 PMIP消息。
以上所述仅为本发明的优选实施例而已, 并不用于限制本发明, 对于 本领域的技术人员来说, 本发明可以有各种更改和变化。 凡在本发明的精 神和原则之内, 所作的任何修改、 等同替换、 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、 一种为 UE分配 IP地址的方法, 其中, 该方法包括:
可信任的非第三代合作伙伴计划接入网络 TNAN接收来自用户设备 UE的 IP地址请求消息,所述 IP地址请求消息包含或者隐式包含 IP地址请 求属性;
所述 TNAN根据所述 IP地址请求消息包含或者隐式包含的 IP地址请 求属性和预先设置的路由策略进行决策, 决策由所述 TNAN为所述 UE分 配 IP地址, 和 /或, 由所述 TNAN请求演进的分组核心网 EPC为所述 UE 分配 IP地址, 之后执行决策结果。
2、根据权利要求 1所述的方法, 其中, 所述 IP地址请求消息包含或者 隐式包含 IP地址请求属性为:
通过所述 IP地址请求消息的类型隐含指示 IP地址请求属性,不同的消 息类型对应不同的 IP地址请求属性,
或者, 所述 IP地址请求消息通过携带 IP地址请求属性标志位指示 IP 地址请求属性,
或者,所述 IP地址请求消息通过不携带 IP地址请求属性标志位隐含指 示 IP地址请求属性。
3、 根据权利要求 1所述的方法, 其中, 所述 IP地址请求属性为: 支 持接入 EPC, 和 /或, 支持业务分流,
所述预先设置的路由策略为: 允许接入 EPC, 和 /或, 允许业务分流。
4、 根据权利要求 3所述的方法, 其中, 所述 TNAN根据所述 IP地址 请求消息包含或者隐式包含的 IP地址请求属性和预先设置的路由策略进行 决策为:
IP地址请求属性支持接入 EPC, 且路由策略允许接入 EPC, 则决策由 所述 TNAN请求 EPC为所述 UE分配 IP地址; IP地址请求属性支持业务分流, 且路由策略允许业务分流, 则决策由 所述 TNAN为所述 UE分配 IP地址。
5、根据权利要求 1至 4任一项所述的方法, 其中, 所述 IP地址请求消 息为路由请求消息或动态主机配置协议 DHCP消息。
6、 根据权利要求 1至 4任一项所述的方法, 其中, 所述 TNAN执行决 策结果之后, 该方法还包括:
所述 TNAN向所述 UE回复 DHCP响应消息,该消息在携带 IP地址的 同时 , 也携带协商的 IP地址属性。
7、根据权利要求 1至 4任一项所述的方法, 其中, 所述 TNAN为无线 局域网络 WLAN。
8、 根据权利要求 1至 4任一项所述的方法, 其中, 所述预先设置的路 由策略由 TNAN本地配置, 或者从 HSS/AAA获取, 没有预先设置的路由 策略, 则默认为预先设置的路由策略支持 UE携带的 IP地址请求属性。
9、 一种为 UE分配 IP地址的方法, 其中, 该方法包括:
UE向 TNAN发送 IP地址请求消息, 其中, 所述 IP地址请求消息包含 或者隐式包含 IP地址请求属性。
10、 根据权利要求 9所述的方法, 其中, 所述 IP地址请求消息包含或 者隐式包含 IP地址请求属性为:
通过所述 IP地址请求消息的类型隐含指示 IP地址请求属性,不同的消 息类型对应不同的 IP地址请求属性,
或者, 所述 IP地址请求消息通过携带 IP地址请求属性标志位指示 IP 地址请求属性,
或者,所述 IP地址请求消息通过不携带 IP地址请求属性标志位隐含指 示 IP地址请求属性。
11、 根据权利要求 9所述的方法, 其中, 所述 IP地址请求属性为: 支 持接入 EPC, 和 /或, 支持业务分流,
所述预先设置的路由策略为: 允许接入 EPC, 和 /或, 允许业务分流。
12、根据权利要求 9至 11任一项所述的方法, 其中, 所述 IP地址请求 消息为路由请求消息或动态主机配置协议 DHCP消息。
13、 一种 TNAN, 其中, 该 TNAN包括: 接收模块、 决策模块和 IP地 址分配模块; 其中,
所述接收模块, 设置为接收来自用户设备 UE的 IP地址请求消息, 所 述 IP地址请求消息包含或者隐式包含 IP地址请求属性;
所述决策模块, 设置为根据所述接收模块接收的 IP地址请求消息包含 或者隐式包含的 IP地址请求属性和预先设置的路由策略进行决策, 决策由 所述 TNAN为所述 UE分配 IP地址 , 和 /或 , 由所述 TNAN请求演进的分 组核心网 EPC为所述 UE分配 IP地址, 之后通知相应的 IP地址分配模块 和 /或 EPC;
所述 IP地址分配模块, 设置为根据所述决策模块的通知, 为所述 UE 分配 IP地址。
14、 根据权利要求 13 所述的 TNAN, 其中, 所述接收模块接收的 IP 地址请求消息包含或者隐式包含 IP地址请求属性为:
通过所述 IP地址请求消息的类型隐含指示 IP地址请求属性,不同的消 息类型对应不同的 IP地址请求属性,
或者, 所述 IP地址请求消息通过携带 IP地址请求属性标志位指示 IP 地址请求属性,
或者,所述 IP地址请求消息通过不携带 IP地址请求属性标志位隐含指 示 IP地址请求属性。
15、 根据权利要求 13 所述的 TNAN, 其中, 所述接收模块接收的 IP 地址请求消息包含或者隐式包含的 IP地址请求属性为: 支持接入 EPC, 和 /或, 支持业务分流,
所述决策模块预先设置的路由策略为: 允许接入 EPC, 和 /或, 允许业 务分流。
16、 根据权利要求 15所述的 TNAN, 其中, 所述决策模块根据所述 IP 地址请求消息包含或者隐式包含的 IP地址请求属性和预先设置的路由策略 进行决策为:
IP地址请求属性支持接入 EPC, 且路由策略允许接入 EPC, 则决策由 所述 TNAN请求 EPC为所述 UE分配 IP地址;
IP地址请求属性支持业务分流, 且路由策略允许业务分流, 则决策由 所述 TNAN为所述 UE分配 IP地址。
17、 根据权利要求 13至 16任一项所述的 TNAN, 其中, 所述接收模 块接收的 IP地址请求消息为路由请求消息或 DHCP消息。
18、 根据权利要求 13至 16任一项所述的 TNAN, 其中, 所述 TNAN 还包括发送模块 , 设置为向所述 UE回复 DHCPv6响应或者 DHCPv4响应 消息, 该消息在携带 IP地址的同时, 也携带协商的 IP地址属性。
19、 根据权利要求 13至 16任一项所述的 TNAN, 其中, 所述 TNAN 为 WLAN。
20、 根据权利要求 13至 16任一项所述的 TNAN, 其中, 所述预先设 置的路由策略由 TNAN本地配置, 或者从 HSS/AAA获取, 如果没有预先 设置的路由策略的话, 则默认为预先设置的路由策略支持 UE携带的 IP地 址请求属性。
21、 一种 UE, 其中, 该 UE包括发送模块,
所述发送模块, 设置为向 TNAN发送 IP地址请求消息, 其中, 所述 IP 地址请求消息包含或者隐式包含 IP地址请求属性。
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