WO2015106565A1 - 通过twan接入核心网时的拥塞控制方法及装置 - Google Patents

通过twan接入核心网时的拥塞控制方法及装置 Download PDF

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Publication number
WO2015106565A1
WO2015106565A1 PCT/CN2014/084552 CN2014084552W WO2015106565A1 WO 2015106565 A1 WO2015106565 A1 WO 2015106565A1 CN 2014084552 W CN2014084552 W CN 2014084552W WO 2015106565 A1 WO2015106565 A1 WO 2015106565A1
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Prior art keywords
twan
congestion
eap
message
pgw
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PCT/CN2014/084552
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English (en)
French (fr)
Inventor
周星月
梁爽
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中兴通讯股份有限公司
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Publication of WO2015106565A1 publication Critical patent/WO2015106565A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W12/00Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/06Authentication
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W28/00Network traffic management; Network resource management
    • H04W28/02Traffic management, e.g. flow control or congestion control
    • H04W28/0215Traffic management, e.g. flow control or congestion control based on user or device properties, e.g. MTC-capable devices
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W28/00Network traffic management; Network resource management
    • H04W28/02Traffic management, e.g. flow control or congestion control
    • H04W28/0231Traffic management, e.g. flow control or congestion control based on communication conditions
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W28/00Network traffic management; Network resource management
    • H04W28/02Traffic management, e.g. flow control or congestion control
    • H04W28/0289Congestion control

Definitions

  • the present invention relates to the field of communications, and in particular to a trusted WLAN access network (TWAN) for accessing a core network.
  • TWAN trusted WLAN access network
  • EPS Evolved Packet System
  • 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
  • PCRF Policy and Charging Rules Function
  • 3GPP began researching support from Rel-11.
  • WLAN as a trusted access network provides user equipment with connectivity to EPC.
  • the user equipment can only establish a single packet data connection through the WLAN network, and does not support the user equipment to perform packet data connection between the WLAN access network and the 3GPP access network. Switching.
  • This data connection can be a packet data connection to the EPC or a NSWO (Non-seamless WLAN offload) connection directly from the WLAN network to the data network.
  • 3GPP is conducting Rel-12 trusted WLAN access.
  • the EPC network has an impact on user equipment. The specific requirements include:
  • FIG. 1 is an architectural diagram of a trusted WLAN access to an EPC network deployment according to the related art.
  • a user equipment is connected to an EPC through a Trusted WLAN access network (TWAN).
  • TWAN Trusted WLAN access network
  • the TWAN supports the S2a GTP/PMIPv6 interface to the PDN GW.
  • the process by which the UE connects to the TWAN is not within the scope of the 3GPP study.
  • 3GPP defines the main functional modules of the TWAN.
  • 2 is a structural block diagram of main functional modules of a TWAN according to the related art, as shown in FIG. 2:
  • a WLAN access network (WLAN Access Network, hereinafter referred to as WLAN AN), which includes one or more WLAN access points (APs) that support 802.11-2007 defined 802.11 links.
  • WLAN AN WLAN Access Network
  • a Trusted WLAN Access Gateway (TWAG) is responsible for forwarding user data forwarding between the UE-TWAG point-to-point link and the S2a tunnel. It is also a specific implementation device for the S2a interface on the TWAN. At the same time, TWAG acts as the default router on the UE access link and acts as the DHCP server of the UE.
  • Trusted WLAN AAA Proxy TWAP
  • TWAP Trusted WLAN AAA Proxy
  • Congestion control includes two situations, one is a control scheme for the overall resource shortage of the network, and the other is a session management congestion control based on APN.
  • the network side initiates a process of controlling the UE to subsequently access the network or the request connected to the APN. Based on how the above congestion control mechanism operates under the trusted WLAN access EPC scenario, no effective solution has been proposed yet.
  • Embodiments of the present invention provide a congestion control method and apparatus when accessing a core network through a TWAN, so as to at least solve the problem of congestion control when a UE accesses a core network through a TWAN.
  • a congestion control method when accessing a core network through a TWAN including: The TWAN indicates a congestion cause to the UE in an EAP-AKA' authentication process with the UE. The method further includes: sending back timer information to the UE in the EAP-AKA' authentication process, where the back timer information is used to indicate that the UE is no longer accessing the current network within a predetermined time.
  • the indicating, by the TWAN, the congestion cause to the UE in the EAP-AKA' authentication process includes: determining, by the TWAN, whether to perform congestion control according to a current network congestion condition in the EAP-AKA' authentication process; If the result of the decision is yes, the TWAN sends an extensible authentication protocol EAP message carrying the congestion cause to the UE.
  • the EAP message further carries the back-off timer information, where the back-off timer information is used to indicate that the UE does not access the current network within a predetermined time.
  • Determining whether to perform congestion control according to a current network congestion condition includes: the TWAN determining whether to perform congestion control according to a local policy.
  • Determining whether the TWAN performs congestion control according to the local policy includes: after receiving the EAP-RSP/Identity message sent by the UE, the TWAN determines whether to perform congestion control according to the local policy; or, the TWAN receives 3GPP After the AAA-Answer message sent by the AAA or the HSS, it is determined according to the local policy whether congestion control is performed.
  • the sending, by the TWAN, the EAP message carrying the congestion cause to the UE includes: sending, by the TWAN, an EAP-REQ/AKA'-Challenge message to the UE, where the EAP-REQ/AKA'-Challenge message carries There is a reason for the congestion.
  • Determining whether to perform congestion control according to the congestion condition of the current network includes: obtaining, by the TWAN, the congestion condition from the PGW, and determining whether to perform congestion control according to the obtained congestion situation information.
  • the message carries the parameter information of the connection request of the UE; the TWAN receives a create session response message or a proxy binding acknowledgement message sent by the PGW, where the create session response message or the proxy binding acknowledge message indicates State the congestion situation.
  • the WAN-Answer message sent by the 3GPP AAA or the HSS is sent by the TWAN, where the AAA-Answer message carries the APN requested by the UE.
  • the TWAN further includes: the TWAN receiving an EAP-RSP/AKA'-Challenge message sent by the UE and carrying the APN requested by the UE.
  • the congestion cause includes at least one of the following: traffic congestion on the TWAN, congestion caused by too many sessions of the specific APN, PGW restart or recovery, recovery for a specific APN on the PGW, and PGW traffic congestion.
  • a congestion control method when accessing a core network through a TWAN including: the UE is in an extensible authentication protocol-authentication and key agreement EAP-AKA' authentication with the TWAN Receiving the congestion reason indicated by the TWAN in the process; the UE accessing the 3GPP core network according to the congestion reason.
  • the method further includes: receiving the back-off timer information sent by the TWAN in the EAP-AKA' authentication process, where the back-off timer information is used to indicate that the UE does not access the current network within a predetermined time.
  • the UE accessing the 3GPP core network according to the congestion reason includes: the UE is no longer accessing the current network within the predetermined time.
  • the congestion cause includes at least one of the following: traffic congestion on the TWAN, congestion caused by too many sessions of the specific APN, PGW restart or recovery, recovery for a specific APN on the PGW, and PGW traffic congestion.
  • a congestion control apparatus when accessing a core network through a TWAN, including: an indication module, configured to be in the EAP-AKA' authentication process of the TWAN and the UE to the UE Indicate the cause of congestion.
  • the indication module is further configured to send back timer information to the UE in the EAP-AKA' authentication process, where the back timer information is used to indicate that the UE does not access the current network within a predetermined time. .
  • the indication module includes: a decision unit, configured to determine whether to perform congestion control according to a current network congestion condition in the EAP-AKA' authentication process; and an indication unit, configured to be in a case where the result of the decision is yes Sending, to the UE, an EAP message carrying the cause of the congestion.
  • the EAP message further carries the back-off timer information, where the back-off timer information is used to indicate that the UE does not access the current network within a predetermined time.
  • the congestion cause includes at least one of the following: traffic congestion on the TWAN, congestion caused by too many sessions of the specific APN, PGW restart or recovery, recovery for a specific APN on the PGW, and PGW traffic congestion.
  • a congestion control apparatus when accessing a core network through a TWAN, including: a receiving module, configured to be an extensible authentication protocol at the user equipment UE and the TWAN - authentication and key The congestion reason for receiving the TWAN indication in the protocol EAP-AKA' authentication process; the access module is configured to access the 3GPP core network according to the congestion cause.
  • the receiving module is further configured to receive the back-off timer information sent by the TWAN in the EAP-AKA' authentication process, where the back-off timer information is used to indicate that the UE does not access the current time within a predetermined time.
  • the internet The access module is configured to prevent the UE from accessing the current network within the predetermined time.
  • the congestion cause includes at least one of the following: traffic congestion on the TWAN, congestion caused by too many sessions of the specific APN, PGW restart or recovery, recovery for a specific APN on the PGW, and PGW traffic congestion.
  • the TWAN indicates the congestion cause to the UE in the EAP-AKA' authentication process of the UE, and solves the problem of congestion control when the UE accesses the core network through the TWAN, and implements the scenario in the above scenario. Congestion control.
  • FIG. 1 is an architectural diagram of a trusted WLAN access to an EPC network deployment according to the related art
  • FIG. 2 is a structural block diagram of main functional modules of a TWAN according to the related art
  • FIG. 1 is an architectural diagram of a trusted WLAN access to an EPC network deployment according to the related art
  • FIG. 2 is a structural block diagram of main functional modules of a TWAN according to the related art
  • FIG. 1 is an architectural diagram of a trusted WLAN access to an EPC network deployment according to the related art
  • FIG. 2 is a structural block diagram of main functional modules of a TWAN according to the related art
  • FIG. 1 is an architectural diagram of a trusted WLAN access to an EPC network deployment according to the related art
  • FIG. 2 is a structural block diagram of main functional modules of a TWAN according to the related art
  • FIG. 1 is an architectural diagram of a trusted WLAN access to an EPC network deployment according to the related art
  • FIG. 2 is a structural block diagram of main functional modules of a TWAN according to the related art
  • Flow chart of congestion control method when accessing core network through TWAN 4 is a flowchart of a congestion control method when accessing a core network through a TWAN according to an embodiment of the present invention
  • FIG. 5 is a flow chart of a congestion control method according to a preferred embodiment 1 of the present invention
  • FIG. 6 is a signaling flow chart of a congestion control method according to a preferred embodiment 2 of the present invention
  • FIG. 7 is a congestion according to a preferred embodiment 3 of the present invention.
  • FIG. 8 is a structural block diagram 1 of a congestion control apparatus when accessing a 3GPP core network through a TWAN according to an embodiment of the present invention
  • FIG. 9 is a 3GPP core accessing through a TWAN according to an embodiment of the present invention.
  • Block diagram 2 of the congestion control device for the network
  • the embodiment of the present invention provides a congestion control method when accessing a core network through a TWAN, including:
  • the TWAN indicates a congestion cause to the UE in an EAP-AKA' authentication process with the UE.
  • the TWAN indicates the congestion cause to the UE in the EAP-AKA' authentication process of the UE, and solves the problem of congestion control when the UE accesses the core network through the TWAN, and implements the scenario in the above scenario. Congestion control.
  • the UE may also send the back-off timer information to the UE in the EAP-AKA' authentication process, where the back-off timer information is used to indicate that the UE does not access the current network within a predetermined time.
  • the congestion cause and the back-off timer information may be indicated in the same message, and the congestion cause and the back-off timer information may be respectively indicated in different messages.
  • the foregoing congestion causes at least one of the following: traffic congestion on the TWAN, congestion caused by excessive number of sessions of the specific APN, PGW restart or recovery, recovery for a specific APN on the PGW, and PGW traffic congestion.
  • Step S302 In the EAP-AKA' authentication process of the UE, the TWAN decides whether to perform congestion control according to the current network congestion condition.
  • Step S304 If the result of the decision is yes, the TWAN sends the EAP carrying the congestion cause to the UE. Message.
  • the EAP message sent in step S304 may further carry back timer information, where the back timer information is used to indicate that the UE does not access the current network within a predetermined time.
  • the TWAN determines whether congestion control is performed according to the local policy.
  • the TWAN determines whether to perform congestion control according to the local policy, including: after receiving the EAP-RSP/Identity message sent by the UE, the TWAN determines whether to perform congestion control according to the local policy; or, the TWAN receives the AAA sent by the 3GPP AAA or the HSS. After the Answer message, decide whether to perform congestion control according to the local policy.
  • the TWAN sending the EAP message carrying the congestion cause to the UE includes: The TWAN sends an EAP-REQ/AKA'-Challenge message to the UE, where the EAP-REQ/AKA'-Challenge message carries the foregoing congestion cause.
  • the TWAN obtains the congestion condition from the PGW, and determines whether to perform congestion control according to the obtained congestion situation information.
  • the TWAN obtaining the foregoing congestion condition from the PGW includes: the TWAN sending a create session request message or a proxy binding update message to the PGW, where the create session request message or the proxy binding update message carries parameter information of the connection request of the UE; TWAN And receiving a create session response message or a proxy binding acknowledgement message sent by the PGW, where the congestion condition is indicated in the create session response message or the proxy binding acknowledgement message. Further, before the TWAN sends a create session request message or a proxy binding update message to the PGW,
  • the TWAN may acquire parameter information of the connection request of the UE from the 3GPP AAA or the HSS. Way three In the EAP-AKA' authentication process of the UE, the TWAN obtains the APN requested by the UE through the 3GPP AAA, and performs congestion control according to the APN decision.
  • the TWAN obtains the APN requested by the UE through the 3GPP AAA, and the TWAN sends an AAA-Request message to the 3GPP AAA or the HSS, where the AAA-Request message carries the EAP-RSP/Identity message of the APN requested by the UE; Receiving an AAA-Answer message sent by the 3GPP AAA or the HSS, where the AAA-Answer message carries the APN requested by the UE. Further, before the TWAN sends the AAA-Request message to the 3GPP AAA or the HSS, the TWAN may further receive an EAP-RSP/AKA'-Challenge message sent by the UE and carrying the APN requested by the UE.
  • the embodiment of the present invention further provides a congestion control method when accessing a 3GPP core network through a TWAN, where the method is a processing flow of the user equipment.
  • 4 is a second flowchart of a congestion control method when accessing a core network through a TWAN according to an embodiment of the present invention.
  • the method includes the following steps (step S402 to step S404): Step S402, the UE is in The congestion reason of the TWAN indication is received in the EAP-AKA' authentication process of the TWAN; in step S404, the UE accesses the 3GPP core network according to the received congestion reason.
  • the UE receives the congestion reason indicated by the TWAN in the EAP-AKA' authentication process with the TWAN, and accesses the 3GPP core network according to the received congestion reason, and solves the problem that when the UE accesses the core network through the TWAN.
  • the congestion control problem achieves congestion control in the above scenario.
  • the back-off timer information sent by the TWAN is received in the EAP-AKA' authentication process, where the back-off timer information is used to indicate that the UE is no longer accessing the current network within a predetermined time. Further, the UE may not access the current network within the predetermined time.
  • FIG. 5 is a flowchart of a congestion control method according to a preferred embodiment 1 of the present invention, which depicts a signaling flow of EAP authentication and authorization performed by a UE from a TWAN to a 3GPP core network.
  • the UE The TWAN and the 3GPP AAA participate in the process.
  • This embodiment describes that the TWAN local determines that the traffic congestion is directly informing the UE of the access failure cause value.
  • the process may include the following steps: Step S502: The user equipment discovers the WLAN coverage signal and attaches to the WLAN network.
  • Steps S504-S510 The TWAN and the user equipment exchange EAP Identity messages, and perform identity authentication access configuration information interaction and the like. Wherein, when the TWAN local policy decides to directly reject the UE EAP message, steps S508-S510 may not be performed.
  • Step S512 The TWAN determines whether the network resource congestion load is overloaded according to the local policy or the configured or updated information.
  • Step S514 Because the TWAN determines that the current network traffic congestion load is overloaded, the EAP message sent to the UE includes a corresponding cause value, and the cause value indicates that the network resource is insufficient, and the message may also include back timer information. The information is used to indicate that the UE does not continue to try to access the current network for a certain period of time.
  • Steps S516-S518 The UE sends an EAP response message corresponding to step S512 to the TWAN, and the TWAN sends an EAP failure message to the UE to notify the access failure.
  • FIG. 6 is a signaling flow chart of a congestion control method according to a preferred embodiment 2 of the present invention.
  • a UE connects to a 3GPP core network from a trusted WLAN access network because a session corresponding to the APN requested by the UE The number of overloads or traffic congestion on the PDN GW, the network startup congestion control refuses the user to establish a connection. As shown in FIG.
  • the method may include the following steps: Step S602: The UE discovers a WLAN coverage signal and attaches to the WLAN network.
  • S604-S618 The TWAN and the user equipment exchange EAP Identity messages, perform identity authentication access configuration information, and the like, and the TWAN serves as an intermediate authentication point to include the user equipment EAP message in the AAA message to the 3GPP AAA/HSS, in the process After the negotiation of the user access mode is completed, the TWAN obtains the PDN connection related information that the UE sends to the network through the 3GPP AAA, including but not limited to the user equipment connection mode, the initial attach/switch indication, the requested APN, the PDN connection type, the PCO, and the like. information.
  • Steps S620-S622 The TWAN sends a create session request message to the PGW, where the message includes the parameter information of the received PDN connection request, and the PGW replies to the TWAN to create a session response message, indicating that the resource is insufficient, the device session is congested, or based on the current APN. Congestion is congested.
  • Step S624 The TWAN obtains current congestion related information from the message of the PGW, and determines whether the network resource congestion load is overloaded.
  • Steps S626-S630 The TWAN sends an EAP message to the user equipment after obtaining the current congestion-related information from the message of the PGW, and the message includes a cause value, indicating a current cause of congestion, including but not limited to session congestion, device congestion, and requesting APN.
  • the session is congested.
  • the message may also include back-off timer information, which is used to indicate that the UE does not continue to try to access the current network for a certain period of time; the TWAN sends an EAP failure message to the UE.
  • FIG. 7 is a signaling flow chart of a congestion control method according to a preferred embodiment 3 of the present invention. In FIG.
  • a UE is connected from a trusted WLAN access network to a 3GPP core network because the network initiates congestion control TWAN. Directly initiate the process of denying the user to establish a connection.
  • the method may include the following steps: Step S702: The user equipment discovers a WLAN coverage signal and attaches to the WLAN network. Steps S704-S718: The TWAN and the user equipment exchange EAP Identity messages, perform identity authentication access configuration information, and the like, and the TWAN serves as an intermediate authentication point to include the user equipment EAP message in the AAA message to the 3GPP AAA/HSS. The user access mode negotiation is also completed.
  • the TWAN obtains the PDN connection related information sent by the UE to the network through the 3GPP AAA, including but not limited to the user equipment connection mode, the initial attach/switch indication, the requested APN, the PDN connection type, the PCO, and the like. information.
  • Step S720 The TWAN determines whether the current related session or network resource is congested according to the received APN to determine whether the network resource congestion load is overloaded.
  • Steps S722-S726 The TWAN sends an EAP message to the user equipment, where the message includes a cause value indicating a current cause of congestion, including but not limited to session congestion, device congestion, and session congestion based on the requested APN, and the message may also include a backoff.
  • the timer information is used to indicate that the UE does not continue to try to access the current network within a certain period of time; the TWAN sends an EAP failure message to the UE, and the access fails.
  • the steps shown in the flowchart of the accompanying drawings may be performed in a computer system such as a set of computer executable instructions, and, although the logical order is shown in the flowchart, in some cases, The steps shown or described may be performed in an order different than that herein.
  • the embodiment of the present invention further provides a congestion control apparatus when accessing a 3GPP core network through a TWAN, where the apparatus is located in a network node, preferably in a TWAN device, and may be configured to implement the foregoing method.
  • the method includes: an indication module 10, configured to be in an EAP-AKA' authentication process of the TWAN and the UE
  • the UE indicates the cause of congestion.
  • the indication module 10 is further configured to send the back-off timer information to the UE in the EAP-AKA' authentication process, where the back-off timer information is used to indicate that the UE is no longer accessing the current network within a predetermined time.
  • the indication module 10 may include: a decision unit, configured to decide whether to perform congestion control according to a current network congestion condition in an EAP-AKA' authentication process; and an indication unit, configured to be in a case where the result of the decision is yes, The EAP message carrying the cause of congestion is sent to the UE.
  • the EAP message further includes the back-off timer information, where the back-off timer information is used to indicate that the UE does not access the current network within a predetermined time.
  • the embodiment of the present invention further provides a congestion control apparatus when accessing a 3GPP core network through a TWAN, where the apparatus is located in a user equipment, and the foregoing method can be implemented.
  • 9 is a structural block diagram 2 of a congestion control apparatus when accessing a 3GPP core network through a TWAN according to an embodiment of the present invention. As shown in FIG. 9, the method includes: a receiving module 20 configured to perform EAP-AKA authentication on a UE and a TWAN.
  • the congestion threshold of the TWAN indication is received in the process; the access module 30 is connected to the receiving module 20, and is configured to access the 3GPP core network according to the foregoing congestion reason.
  • the receiving module 20 is further configured to receive the back-off timer information sent by the TWAN in the EAP-AKA' authentication process, where the back-off timer information is used to indicate that the UE does not access the current network within a predetermined time.
  • the TWAN indicates the congestion cause to the UE in the EAP-AKA' authentication process with the UE, and the UE receives the congestion reason indicated by the TWAN in the EAP-AKA' authentication process with the TWAN, and according to the received congestion.
  • the reason for accessing the 3GPP core network solves the problem of congestion control when the UE accesses the core network through the TWAN, and implements congestion control in the above scenario.
  • the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices.
  • the congestion control method and apparatus for accessing a core network through a TWAN may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device, or they may be separately fabricated into individual integrated circuit modules, or they may be Multiple modules or steps are made into a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.
  • Industrial Applicability As described above, the congestion control method and apparatus for accessing a core network through a TWAN according to an embodiment of the present invention have the following beneficial effects: Congestion control under the TWAN access EPC scenario is implemented.

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Abstract

本发明公开了一种通过信任的WLAN接入网(TWAN)接入核心网时的拥塞控制方法及装置,其中,该方法包括:TWAN在与用户设备(UE)的可扩展的认证协议-认证和密钥协议(EAP-AKA')认证流程中向UE指示拥塞原因。通过本发明,实现了UE通过TWAN接入核心网时的拥塞控制问题。

Description

通过 TWAN接入核心网时的拥塞控制方法及装置 技术领域 本发明涉及通信领域, 具体而言, 涉及一种通过信任的 WLAN接入网 (Trusted WLAN access network, 简称为 TWAN) 接入核心网时的拥塞控制方法及装置。 背景技术
3GPP演进的分组系统 (Evolved Packet System, 简称为 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, 简称为 E-UTRAN) 移动管理单元 (Mobility Management Entity, 简称为 MME)、 服务网关 ( Serving Gateway,简称为 S-GW)、分组数据网络网关(Packet Data Network Gateway, 简称为 P-GW或者 PDN GW)、归属用户服务器(Home Subscriber Server,简称为 HSS)、 策略和计费规则功能(Policy and Charging Rules Function, 简称为 PCRF) 实体及其他 支撑节点组成。 随着 WLAN接入技术的日益成熟和普及, 以及用户对高速无线接入的需求, 国内 外运营商都在大力发展 WLAN业务。 WLAN业务作为蜂窝数据网络的分流手段, 作 用越来越重要。
3GPP从 Rel-11开始研究支持 WLAN作为信任的接入网络为用户设备提供到 EPC 的连接。 Rel-11阶段, 主要研究对用户设备没用影响的方案, 用户设备通过 WLAN网 络只能建立单条分组数据连接,且不支持用户设备在 WLAN接入网和 3GPP接入网之 间进行分组数据连接的切换。这条数据连接可以是到 EPC的分组数据连接, 也可以是 从 WLAN网络直接连到数据网络的 NSWO (Non-seamless WLAN offload) 连接。 目前, 3GPP正在进行 Rel-12信任的 WLAN接入 EPC网络对用户设备有影响方 案的研究, 具体需求包括:
1 ) 兼容 Rl l SaMOG的方案;
2) 支持多分组数据网络 (Packet Data Network, PDN) 连接、 切换等流程; 3 ) 支持传递接入点 (Access Point Name, 简称为 APN)、 PDN类型等信息;
4) 支持同时通过 WLAN接入 EPC和 WLAN业务分流的场景。 UE能够向网络侧指示其是否支持接入 EPC或者 NSWO, 且网络侧也会向 UE指 示决策的接入 EPC或者 NSWO的结果。 图 1是根据相关技术的信任的 WLAN接入到 EPC网络部署的架构图, 如图 1所 示, 用户设备通过信任的 WLAN接入网络 (Trusted WLAN access network, 简称为 TWAN) 连接到 EPC。 TWAN支持到 PDN GW的 S2a GTP/PMIPv6接口。 UE连接到 TWAN内部的流程不在 3GPP研究范围内。但 3GPP定义了组成的 TWAN的主要功能 模块。 图 2是根据相关技术的 TWAN的主要功能模块的结构框图, 如图 2所示:
WLAN接入网 (WLAN Access Network, 简称为 WLAN AN), 包含一个或者多个 支持 802.11-2007定义的 802.11链路的 WLAN接入点 (Access Point, 简称为 AP;)。 信任的 WLAN接入网关 (Trusted WLAN Access Gateway, 简称为 TWAG), 负责 转发 UE-TWAG点到点链路和 S2a隧道之间的用户数据转发,也是 TWAN上 S2a接口 的具体实现功能设备。 同时, TWAG作为 UE接入链路上的默认路由器, 并且作为 UE 的 DHCP服务器。 信任的 WLAN接入代理 (Trusted WLAN AAA Proxy, 简称为 TWAP), 该功能模 块主要在 WLAN接入网络和 3GPP验证、授权和记账(Authentication Authorization Accounting, 简称为 AAA) 之间传递认证授权计费信息。 拥塞控制包括两种情况, 一种是针对网络整体资源紧张采取的控制方案, 一种是 基于 APN的会话管理拥塞控制。 当网络流量变大资源紧张或者某个 APN下的会话数 过大导致流量拥塞或即将导致拥塞时, 网络侧发起的控制 UE后续接入网络或连接到 该 APN的请求的过程。而基于上述拥塞控制机制如何在信任的 WLAN接入 EPC场景 下运作, 目前尚未提出有效的解决方案。 发明内容 本发明实施例提供了一种通过 TWAN接入核心网时的拥塞控制方法及装置, 以至 少解决在 UE通过 TWAN接入核心网时的拥塞控制的问题。 根据本发明的一个实施例, 提供了一种通过 TWAN接入核心网时的拥塞控制方 法, 包括: TWAN在与 UE的 EAP-AKA'认证流程中向所述 UE指示拥塞原因。 上述方法还包括: 在所述 EAP-AKA'认证流程中向所述 UE发送后退定时器信息, 其中所述后退定时器信息用于指示所述 UE在预定时间内不再接入当前网络。 所述 TWAN在所述 EAP-AKA'认证流程中向所述 UE指示拥塞原因包括: 所述 TWAN在所述 EAP-AKA'认证流程中, 根据当前网络的拥塞情况决策是否进行拥塞控 制; 在所述决策的结果为是的情况下, 所述 TWAN向所述 UE发送携带有所述拥塞原 因的可扩展的认证协议 EAP消息。 所述 EAP消息中还携带有后退定时器信息,其中所述后退定时器信息用于指示所 述 UE在预定时间内不再接入当前网络。 所述根据当前网络的拥塞情况决策是否进行拥塞控制包括:所述 TWAN根据本地 策略决策是否进行拥塞控制。 所述 TWAN根据本地策略决策是否进行拥塞控制包括: 所述 TWAN接收到所述 UE发送的 EAP-RSP/Identity消息后,根据所述本地策略决策是否进行拥塞控制;或者, 所述 TWAN接收到 3GPP AAA或 HSS发送的 AAA-Answer 消息后, 根据所述本地策 略决策是否进行拥塞控制。 所述 TWAN向所述 UE发送携带有所述拥塞原因的 EAP消息包括: 所述 TWAN 向所述 UE发送 EAP-REQ/AKA'-Challenge消息, 其中所述 EAP-REQ/AKA'-Challenge 消息携带有所述拥塞原因。 所述根据当前网络的拥塞情况决策是否进行拥塞控制包括: 所述 TWAN从 PGW 获取所述拥塞情况, 根据获取到的所述拥塞情况信息决策是否进行拥塞控制。 所述 TWAN从 PGW获取所述拥塞情况包括: 所述 TWAN向所述 PGW发送所述 创建会话请求消息或所述代理绑定更新消息, 其中, 所述创建会话请求消息或所述代 理绑定更新消息携带有所述 UE的连接请求的参数信息; 所述 TWAN接收所述 PGW 发送的创建会话响应消息或代理绑定确认消息, 其中, 所述创建会话响应消息或代理 绑定确认消息中指示所述拥塞情况。 所述 TWAN向 PGW发送创建会话请求消息或代理绑定更新消息之前还包括: 所 述 TWAN从 3GPP AAA或 HSS获取所述 UE的所述参数信息。 所述根据当前网络的拥塞情况决策是否进行拥塞控制包括:所述 TWAN通过 3GPP AAA或 HSS获得所述 UE请求的 APN, 根据所述 APN决策是否进行拥塞控制。 所述 TWAN通过 3GPP AAA获得所述 UE请求的 APN包括:所述 TWAN向 3GPP AAA或 HSS发送 AAA-Request消息, 其中所述 AAA-Request消息中携带有所述 UE 请求的 APN的 EAP-RSP/Identity消息; 所述 TWAN接收所述 3GPP AAA或 HSS发送 的 AAA-Answer消息, 其中所述 AAA-Answer消息中携带有所述 UE请求的 APN。 所述 TWAN向 3GPP AAA或 HSS发送 AAA-Request消息之前还包括:所述 TWAN 接收所述 UE发送的携带有所述 UE请求的 APN的 EAP-RSP/AKA'-Challenge消息。 所述拥塞原因包括以下至少之一: TWAN上的流量拥塞、 特定 APN的会话数过 多引起的拥塞、 PGW重启或恢复、 PGW上为某个特定 APN进行的恢复、 PGW流量 拥塞。 根据本发明的另一实施例, 提供了一种通过 TWAN接入核心网时的拥塞控制方 法, 包括: UE在与所述 TWAN的可扩展的认证协议-认证和密钥协议 EAP-AKA'认证 流程中接收所述 TWAN指示的拥塞原因; 所述 UE根据所述拥塞原因接入所述 3GPP 核心网。 上述方法还包括: 在所述 EAP-AKA'认证流程中接收所述 TWAN发送的后退定时 器信息,其中所述后退定时器信息用于指示所述 UE在预定时间内不再接入当前网络。 所述 UE根据所述拥塞原因接入所述 3GPP核心网包括:所述 UE在所述预定时间 内不再接入所述当前网络。 所述拥塞原因包括以下至少之一: TWAN上的流量拥塞、 特定 APN的会话数过 多引起的拥塞、 PGW重启或恢复、 PGW上为某个特定 APN进行的恢复、 PGW流量 拥塞。 根据本发明的另一实施例, 提供了一种通过 TWAN接入核心网时的拥塞控制装 置,包括: 指示模块, 设置为在所述 TWAN与 UE的 EAP-AKA'认证流程中向所述 UE 指示拥塞原因。 所述指示模块还设置为在所述 EAP-AKA'认证流程中向所述 UE发送后退定时器 信息, 其中所述后退定时器信息用于指示所述 UE在预定时间内不再接入当前网络。 所述指示模块包括: 决策单元, 设置为在所述 EAP-AKA'认证流程中, 根据当前 网络的拥塞情况决策是否进行拥塞控制; 指示单元, 设置为在所述决策的结果为是的 情况下, 向所述 UE发送携带有所述拥塞原因的 EAP消息。 所述 EAP消息中还携带有后退定时器信息,其中所述后退定时器信息用于指示所 述 UE在预定时间内不再接入当前网络。 所述拥塞原因包括以下至少之一: TWAN上的流量拥塞、 特定 APN的会话数过 多引起的拥塞、 PGW重启或恢复、 PGW上为某个特定 APN进行的恢复、 PGW流量 拥塞。 根据本发明的一个实施例, 提供了一种通过 TWAN接入核心网时的拥塞控制装 置, 包括: 接收模块, 设置为在用户设备 UE与所述 TWAN的可扩展的认证协议 -认证 和密钥协议 EAP-AKA'认证流程中接收所述 TWAN指示的拥塞原因; 接入模块, 设置 为根据所述拥塞原因接入所述 3GPP核心网。 所述接收模块还设置为在所述 EAP-AKA'认证流程中接收所述 TWAN发送的后退 定时器信息, 其中所述后退定时器信息用于指示所述 UE在预定时间内不再接入当前 网络。 所述接入模块设置为使所述 UE在所述预定时间内不再接入所述当前网络。 所述拥塞原因包括以下至少之一: TWAN上的流量拥塞、 特定 APN的会话数过 多引起的拥塞、 PGW重启或恢复、 PGW上为某个特定 APN进行的恢复、 PGW流量 拥塞。 通过本发明实施例, TWAN在与 UE的 EAP-AKA'认证流程中向所述 UE指示拥 塞原因, 解决了在 UE通过 TWAN接入核心网时的拥塞控制的问题, 实现了在上述场 景下的拥塞控制。 附图说明 此处所说明的附图用来提供对本发明的进一步理解, 构成本申请的一部分, 本发 明的示意性实施例及其说明用于解释本发明, 并不构成对本发明的不当限定。 在附图 中: 图 1是根据相关技术的信任的 WLAN接入到 EPC网络部署的架构图; 图 2是根据相关技术的 TWAN的主要功能模块的结构框图; 图 3 是根据本发明实施例的通过 TWAN接入核心网时的拥塞控制方法的流程图 图 4是根据本发明实施例的通过 TWAN接入核心网时的拥塞控制方法的流程图
图 5是根据本发明优选实施例 1的拥塞控制方法的流程图; 图 6是根据本发明优选实施例 2的拥塞控制方法的信令流程图; 图 7是根据本发明优选实施例 3的拥塞控制方法的信令流程图; 图 8是根据本发明实施例的通过 TWAN接入 3GPP核心网时的拥塞控制装置的结 构框图一; 以及 图 9是根据本发明实施例的通过 TWAN接入 3GPP核心网时的拥塞控制装置的结 构框图二。 具体实施方式 需要说明的是, 在不冲突的情况下, 本申请中的实施例及实施例中的特征可以相 互组合。 下面将参考附图并结合实施例来详细说明本发明。 本发明实施例提供了一种通过 TWAN接入核心网时的拥塞控制方法,包括: TWAN 在与 UE的 EAP-AKA'认证流程中向所述 UE指示拥塞原因。 通过本发明实施例, TWAN在与 UE的 EAP-AKA'认证流程中向所述 UE指示拥 塞原因, 解决了在 UE通过 TWAN接入核心网时的拥塞控制的问题, 实现了在上述场 景下的拥塞控制。 在本发明实施例的一个优选实施方式中, 还可以在 EAP-AKA'认证流程中向 UE 发送后退定时器信息, 该后退定时器信息用于指示 UE在预定时间内不再接入当前网 络。 进一步的, 可以在同一个消息中指示拥塞原因和后退定时器信息, 也可以在不同 的消息中分别指示拥塞原因和后退定时器信息。 优选地, 上述拥塞原因包括以下至少之一: TWAN上的流量拥塞、 特定 APN的 会话数过多引起的拥塞、 PGW重启或恢复、 PGW上为某个特定 APN进行的恢复、 PGW 流量拥塞。 图 3 是根据本发明实施例的通过 TWAN接入核心网时的拥塞控制方法的流程图 一, 如图 3所示, 该方法包括以下步骤 (步骤 S302至步骤 S304): 步骤 S302, TWAN在 UE的 EAP-AKA'认证流程中, 根据当前网络的拥塞情况决 策是否进行拥塞控制; 步骤 S304, 在决策的结果为是的情况下, TWAN 向 UE发送携带有拥塞原因的 EAP消息。 优选地, 步骤 S304中发送的 EAP消息中还可以携带后退定时器信息, 该后退定 时器信息用于指示 UE在预定时间内不再接入当前网络。 在本发明实施例中, 以以下三种方式为例对本发明实施例的上述方法进行说明, 需要说明的是本发明实施例并不限于以下方式。 方式一 TWAN在 UE的 EAP-AKA'认证流程中, 根据本地策略决策是否进行拥塞控制。 优选地, TWAN根据本地策略决策是否进行拥塞控制包括: TWAN接收到 UE发 送的 EAP-RSP/Identity消息后, 根据本地策略决策是否进行拥塞控制; 或者, TWAN 接收到 3GPP AAA或 HSS发送的 AAA-Answer消息后, 根据本地策略决策是否进行 拥塞控制。 进一步的, TWAN向 UE发送携带有拥塞原因的 EAP消息包括: TWAN向 UE 发送 EAP-REQ/AKA'-Challenge消息,其中 EAP-REQ/AKA'-Challenge消息携带有上述 拥塞原因。 方式二 在 UE的 EAP-AKA'认证流程中, TWAN从 PGW获取上述拥塞情况,根据获取到 的拥塞情况信息决策是否进行拥塞控制。 优选地, TWAN从 PGW获取上述拥塞情况包括: TWAN向 PGW发送创建会话 请求消息或代理绑定更新消息, 其中, 创建会话请求消息或代理绑定更新消息携带有 UE的连接请求的参数信息; TWAN接收 PGW发送的创建会话响应消息或代理绑定确 认消息, 其中, 创建会话响应消息或代理绑定确认消息中指示有上述拥塞情况。 进一步的, 在 TWAN向 PGW发送创建会话请求消息或代理绑定更新消息之前,
TWAN可以从 3GPP AAA或 HSS获取 UE的的连接请求的参数信息。 方式三 在 UE的 EAP-AKA'认证流程中, TWAN通过 3GPP AAA获得 UE请求的 APN, 根据 APN决策是否进行拥塞控制。 优选地, TWAN通过 3GPP AAA获得 UE请求的 APN包括: TWAN向 3GPP AAA 或 HSS发送 AAA-Request消息, 其中该 AAA-Request消息中携带有 UE请求的 APN 的 EAP-RSP/Identity消息; 所述 TWAN接收 3GPP AAA或 HSS发送的 AAA- Answer 消息, 其中 AAA- Answer消息中携带有所述 UE请求的 APN。 进一步的, 在 TWAN向 3GPP AAA或 HSS发送 AAA-Request消息之前, TWAN 还可以接收 UE发送的携带有该 UE请求的 APN的 EAP-RSP/AKA'-Challenge消息。 与上述方法对应, 本发明实施例还提供了一种通过 TWAN接入 3GPP核心网时的 拥塞控制方法, 该方法为用户设备的处理流程。 图 4是根据本发明实施例的通过 TWAN接入核心网时的拥塞控制方法的流程图 二, 如图 4所示, 该方法包括以下步骤 (步骤 S402至步骤 S404): 步骤 S402,UE在与 TWAN的 EAP-AKA'认证流程中接收 TWAN指示的拥塞原因; 步骤 S404, UE根据接收到的拥塞原因接入 3GPP核心网。 通过本发明实施例, UE在与 TWAN的 EAP-AKA'认证流程中接收 TWAN指示的 拥塞原因, 并根据接收到的拥塞原因接入 3GPP核心网, 解决了在 UE通过 TWAN接 入核心网时的拥塞控制的问题, 实现了在上述场景下的拥塞控制。 优选地, 还可以在 EAP-AKA'认证流程中接收 TWAN发送的后退定时器信息, 该 后退定时器信息用于指示所述 UE在预定时间内不再接入当前网络。 进一步的, UE可以在上述预定时间内不再接入当前网络。 为了使本发明的技术方案和实现方法更加清楚, 下面将结合优选的实施例对其实 现过程进行详细描述。 优选实施例 1 图 5 是根据本发明优选实施例 1 的拥塞控制方法的流程图, 该图描述了 UE从 TWAN连接到 3GPP核心网进行的 EAP认证授权的信令流程, 在图 5中, UE、 TWAN 和 3GPP AAA参与到该流程中,本实施例描述的是 TWAN本地判定流量拥塞直接在通 知 UE接入失败原因值。 如图 5所示, 该流程可以包括如下步骤: 步骤 S502: 用户设备发现 WLAN覆盖信号, 附着到 WLAN网络。 步骤 S504-S510: TWAN和用户设备交互 EAP Identity消息,进行身份认证接入配 置信息交互等处理。 其中, 当 TWAN本地策略决定直接拒绝 UE EAP消息时, 步骤 S508-S510也可能 不会执行。 步骤 S512: TWAN根据本地策略或者配置或更新的信息, 判断网络资源拥塞负荷 是否过载。 步骤 S514: 因为 TWAN判定当前网络流量拥塞负荷有过载的情况,在向 UE发送 的 EAP消息中包含了相应的原因值, 原因值指示网络资源不足, 该消息中也可能包含 后退定时器信息, 该信息用于指示 UE在接下来某个时间段内不要继续尝试接入到当 前网络。 步骤 S516-S518: UE向 TWAN发送对应步骤 S512步的 EAP响应消息, TWAN 向 UE发送 EAP失败消息通知接入失败。 优选实施例 2 图 6是根据本发明优选实施例 2的拥塞控制方法的信令流程图, 在图 6中, UE 从信任 WLAN接入网络连接到 3GPP核心网, 因为 UE请求的 APN对应的会话数过 载或 PDN GW上流量拥塞,网络启动拥塞控制拒绝用户建立连接的过程。如图 6所示, 该方法可以包括如下步骤: 步骤 S602: UE发现 WLAN覆盖信号, 附着到 WLAN网络。 S604-S618: TWAN和用户设备交互 EAP Identity消息, 进行身份认证接入配置信 息等处理, TWAN作为中间认证点将用户设备 EAP 的消息包含在 AAA消息传递给 3GPP AAA/HSS, 这一过程中还完成用户接入模式的协商, TWAN通过 3 GPP AAA获 得 UE向网络发送的 PDN连接相关信息, 包括但不限于用户设备连接模式, 初始附着 /切换指示, 请求的 APN, PDN连接类型, PCO等参数信息。 步骤 S620-S622: TWAN向 PGW发送创建会话请求消息,消息中包含收到的 PDN 连接请求各个参数信息, PGW向 TWAN回复创建会话响应消息, 消息中指示资源不 足, 设备会话拥塞或基于当前 APN的会话拥塞。 步骤 S624: TWAN从 PGW的消息中获取当前拥塞相关信息, 判断网络资源拥塞 负荷是否过载。 步骤 S626-S630: TWAN从 PGW的消息中获取当前拥塞相关信息后向用户设备发 送 EAP消息,消息中包含原因值,指示当前拥塞的相关原因,包括但不限于会话拥塞, 设备拥塞, 基于请求 APN的会话拥塞, 该消息中也可能包含后退定时器信息, 该信息 用于指示 UE在接下来某个时间段内不要继续尝试接入到当前网络; TWAN向 UE发 送 EAP失败消息。 优选实施例 3 图 7是根据本发明优选实施例 3的拥塞控制方法的信令流程图, 在图 7中, 描绘 了 UE从信任 WLAN接入网络连接到 3GPP核心网,因为网络启动拥塞控制 TWAN直 接发起拒绝用户建立连接的过程。 如图 7所示, 该方法可以包括如下步骤: 步骤 S702: 用户设备发现 WLAN覆盖信号, 附着到 WLAN网络。 步骤 S704-S718: TWAN和用户设备交互 EAP Identity消息,进行身份认证接入配 置信息等处理, TWAN作为中间认证点将用户设备 EAP的消息包含在 AAA消息传递 给 3GPP AAA/HSS, 这一过程中还完成用户接入模式的协商, TWAN通过 3GPP AAA 获得 UE向网络发送的 PDN连接相关信息, 包括但不限于用户设备连接模式, 初始附 着 /切换指示, 请求的 APN, PDN连接类型, PCO等参数信息。 步骤 S720: TWAN根据收到的 APN判断当前相关会话或网络资源是否拥塞判断 网络资源拥塞负荷是否过载。 步骤 S722-S726: TWAN向用户设备发送 EAP消息, 消息中包含原因值, 指示当 前拥塞的相关原因, 包括但不限于会话拥塞, 设备拥塞, 基于请求 APN的会话拥塞, 该消息中也可能包含后退定时器信息, 该信息用于指示 UE在接下来某个时间段内不 要继续尝试接入到当前网络; TWAN向 UE发送 EAP失败消息, 接入失败。 需要说明的是, 在附图的流程图示出的步骤可以在诸如一组计算机可执行指令的 计算机系统中执行, 并且, 虽然在流程图中示出了逻辑顺序, 但是在某些情况下, 可 以以不同于此处的顺序执行所示出或描述的步骤。 本发明实施例还提供了一种通过 TWAN接入 3GPP核心网时的拥塞控制装置, 该 装置位于网络节点中, 优选地位于 TWAN设备中, 可以设置为实现上述方法。 图 8是 根据本发明实施例的通过 TWAN接入 3GPP核心网时的拥塞控制装置的结构框图一, 如图 8所示, 包括: 指示模块 10, 设置为在 TWAN与 UE的 EAP-AKA'认证流程中向
UE指示拥塞原因。 优选地, 指示模块 10还设置为在 EAP-AKA'认证流程中向 UE发送后退定时器信 息, 其中所述后退定时器信息用于指示所述 UE在预定时间内不再接入当前网络。 优选地, 指示模块 10可以包括: 决策单元, 设置为在 EAP-AKA'认证流程中, 根 据当前网络的拥塞情况决策是否进行拥塞控制; 指示单元, 设置为在决策的结果为是 的情况下, 向 UE发送携带有拥塞原因的 EAP消息。 进一步的, 上述 EAP消息中还携带有后退定时器信息, 其中后退定时器信息用于 指示 UE在预定时间内不再接入当前网络。 对应的, 本发明实施例还提供了一种通过 TWAN接入 3GPP核心网时的拥塞控制 装置, 该装置位于用户设备中, 可以实现上述方法。 图 9是根据本发明实施例的通过 TWAN接入 3GPP核心网时的拥塞控制装置的结构框图二, 如图 9所示, 包括: 接收 模块 20, 设置为在 UE与 TWAN的 EAP-AKA'认证流程中接收 TWAN指示的拥塞原 因;接入模块 30,与接收模块 20相连接,设置为根据上述拥塞原因接入 3GPP核心网。 优选地, 接收模块 20还设置为在 EAP-AKA'认证流程中接收 TWAN发送的后退 定时器信息, 其中后退定时器信息用于指示 UE在预定时间内不再接入当前网络。 需要说明的是, 装置实施例中描述的装置对应于上述的方法实施例, 其具体的实 现过程在方法实施例中已经进行过详细说明, 在此不再赘述。 综上所述, TWAN在与 UE的 EAP-AKA'认证流程中向所述 UE指示拥塞原因, UE在与 TWAN的 EAP-AKA'认证流程中接收 TWAN指示的拥塞原因, 并根据接收到 的拥塞原因接入 3GPP核心网, 解决了在 UE通过 TWAN接入核心网时的拥塞控制的 问题, 实现了在上述场景下的拥塞控制。 显然, 本领域的技术人员应该明白, 上述的本发明的各模块或各步骤可以用通用 的计算装置来实现, 它们可以集中在单个的计算装置上, 或者分布在多个计算装置所 组成的网络上, 可选地, 它们可以用计算装置可执行的程序代码来实现, 从而, 可以 将它们存储在存储装置中由计算装置来执行, 或者将它们分别制作成各个集成电路模 块, 或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。 这样, 本发明 不限制于任何特定的硬件和软件结合。 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。 工业实用性 如上所述,本发明实施例提供的一种通过 TWAN接入核心网时的拥塞控制方法及 装置, 具有以下有益效果: 实现了在 TWAN接入 EPC场景下的拥塞控制。

Claims

权 利 要 求 书
1. 一种通过信任的 WLAN接入网 TWAN接入核心网时的拥塞控制方法, 包括: 所述 TWAN 在与用户设备 UE 的可扩展的认证协议-认证和密钥协议 EAP-AKA'认证流程中向所述 UE指示拥塞原因。
2. 根据权利要求 1所述的方法, 其中, 还包括: 在所述 EAP-AKA'认证流程中向 所述 UE发送后退定时器信息, 其中所述后退定时器信息用于指示所述 UE在 预定时间内不再接入当前网络。
3. 根据权利要求 1所述的方法, 其中, 所述 TWAN在所述 EAP-AKA'认证流程中 向所述 UE指示拥塞原因包括:
所述 TWAN在所述 EAP-AKA'认证流程中,根据当前网络的拥塞情况决策 是否进行拥塞控制;
在所述决策的结果为是的情况下,所述 TWAN向所述 UE发送携带有所述 拥塞原因的可扩展的认证协议 EAP消息。
4. 根据权利要求 3所述的方法,其中,所述 EAP消息中还携带有后退定时器信息, 其中所述后退定时器信息用于指示所述 UE在预定时间内不再接入当前网络。
5. 根据权利要求 3或 4所述的方法, 其中, 所述根据当前网络的拥塞情况决策是 否进行拥塞控制包括:
所述 TWAN根据本地策略决策是否进行拥塞控制。
6. 根据权利要求 5所述的方法, 其中, 所述 TWAN根据本地策略决策是否进行拥 塞控制包括:
所述 TWAN接收到所述 UE发送的 EAP-RSP/Identity消息后, 根据所述本 地策略决策是否进行拥塞控制; 或者
所述 TWAN接收到 3GPP验证、 授权和记账 AAA或归属用户服务器 HSS 发送的 AAA-Answer消息后, 根据所述本地策略决策是否进行拥塞控制。
7. 根据权利要求 6所述的方法, 其中, 所述 TWAN向所述 UE发送携带有所述拥 塞原因的 EAP消息包括: 所述 TWAN 向所述 UE发送 EAP-REQ/AKA'-Challenge消息, 其中所述 EAP-REQ/AKA'-Challenge消息携带有所述拥塞原因。
8. 根据权利要求 3或 4所述的方法, 其中, 所述根据当前网络的拥塞情况决策是 否进行拥塞控制包括:
所述 TWAN从分组数据网络网关 PGW获取所述拥塞情况, 根据获取到的 所述拥塞情况信息决策是否进行拥塞控制。
9. 根据权利要求 8所述的方法, 其中, 所述 TWAN从 PGW获取所述拥塞情况包 括:
所述 TWAN向所述 PGW发送创建会话请求消息或代理绑定更新消息, 其 中, 所述创建会话请求消息或所述代理绑定更新消息携带有所述 UE的连接请 求的参数信息;
所述 TWAN接收所述 PGW发送的创建会话响应消息或代理绑定确认消 息, 其中, 所述创建会话响应消息或代理绑定确认消息中指示所述拥塞情况。
10. 根据权利要求 9所述的方法, 其中, 所述 TWAN向 PGW发送创建会话请求消 息或代理绑定更新消息之前还包括:
所述 TWAN从 3GPP AAA或 HSS获取所述 UE的所述参数信息。
11. 根据权利要求 3或 4所述的方法, 其中, 所述根据当前网络的拥塞情况决策是 否进行拥塞控制包括:
所述 TWAN通过 3GPP AAA或 HSS获得所述 UE请求的 APN, 根据所述
APN决策是否进行拥塞控制。
12. 根据权利要求 11所述的方法,其中,所述 TWAN通过 3GPP AAA获得所述 UE 请求的 APN包括:
所述 TWAN 向 3GPP AAA或 HSS发送 AAA-Request消息, 其中所述 AAA-Request消息中携带有所述 UE请求的 APN的 EAP-RSP/Identity消息; 所述 TWAN接收所述 3 GPP AAA或 HS S发送的 AAA- Answer消息, 其中 所述 AAA-Answer消息中携带有所述 UE请求的 APN。
13. 根据权利要求 12所述的方法, 其中, 所述 TWAN向 3GPP AAA或 HSS发送 AAA-Request消息之前还包括: 所述 TWAN 接收所述 UE 发送的携带有所述 UE 请求的 APN 的 EAP-RSP/AKA'-Challenge消息。
14. 根据权利要求 1至 4中任一项所述的方法, 其中, 所述拥塞原因包括以下至少 之一: TWAN上的流量拥塞、 特定 APN的会话数过多引起的拥塞、 PGW重启 或恢复、 PGW上为某个特定 APN进行的恢复、 PGW流量拥塞。
15. 一种通过信任的 WLAN接入网 TWAN接入核心网时的拥塞控制方法, 包括: 用户设备 UE 在与所述 TWAN 的可扩展的认证协议-认证和密钥协议 EAP-AKA'认证流程中接收所述 TWAN指示的拥塞原因; 所述 UE根据所述拥塞原因接入所述 3GPP核心网。
16. 根据权利要求 15所述的方法, 其中, 还包括: 在所述 EAP-AKA'认证流程中接 收所述 TWAN发送的后退定时器信息,其中所述后退定时器信息用于指示所述 UE在预定时间内不再接入当前网络。
17. 根据权利要求 16所述的方法,其中,所述 UE根据所述拥塞原因接入所述 3GPP 核心网包括: 所述 UE在所述预定时间内不再接入所述当前网络。
18. 根据权利要求 15至 17中任一项所述的方法, 其中, 所述拥塞原因包括以下至 少之一: TWAN上的流量拥塞、 特定接入点 APN的会话数过多引起的拥塞、 分组数据网络网关 PGW重启或恢复、 PGW上为某个特定 APN进行的恢复、 PGW流量拥塞。
19. 一种通过信任的 WLAN接入网 TWAN接入核心网时的拥塞控制装置, 包括: 指示模块, 设置为在所述 TWAN与用户设备 UE的可扩展的认证协议-认 证和密钥协议 EAP-AKA'认证流程中向所述 UE指示拥塞原因。
20. 根据权利要求 19所述的装置, 其中, 所述指示模块还设置为在所述 EAP-AKA' 认证流程中向所述 UE发送后退定时器信息, 其中所述后退定时器信息用于指 示所述 UE在预定时间内不再接入当前网络。
21. 根据权利要求 19所述的装置, 其中, 所述指示模块包括: 决策单元, 设置为在所述 EAP-AKA'认证流程中, 根据当前网络的拥塞情 况决策是否进行拥塞控制; 指示单元, 设置为在所述决策的结果为是的情况下, 向所述 UE发送携带 有所述拥塞原因的可扩展的认证协议 EAP消息。
22. 根据权利要求 21所述的装置, 其中, 所述 EAP消息中还携带有后退定时器信 息, 其中所述后退定时器信息用于指示所述 UE在预定时间内不再接入当前网 络。
23. 根据权利要求 19至 22中任一项所述的装置, 其中, 所述拥塞原因包括以下至 少之一: TWAN上的流量拥塞、 特定 APN的会话数过多引起的拥塞、 PGW重 启或恢复、 PGW上为某个特定 APN进行的恢复、 PGW流量拥塞。
24. 一种通过信任的 WLAN接入网 TWAN接入核心网时的拥塞控制装置, 包括: 接收模块, 设置为在用户设备 UE与所述 TWAN的可扩展的认证协议-认 证和密钥协议 EAP-AKA'认证流程中接收所述 TWAN指示的拥塞原因; 接入模块, 设置为根据所述拥塞原因接入所述 3GPP核心网。
25. 根据权利要求 24所述的装置, 其中, 所述接收模块还设置为在所述 EAP-AKA' 认证流程中接收所述 TWAN发送的后退定时器信息,其中所述后退定时器信息 用于指示所述 UE在预定时间内不再接入当前网络。
26. 根据权利要求 25所述的装置, 其中, 所述接入模块还设置为使所述 UE在所述 预定时间内不再接入所述当前网络。
27. 根据权利要求 24至 26中任一项所述的装置, 其中, 所述拥塞原因包括以下至 少之一: TWAN上的流量拥塞、 特定 APN的会话数过多引起的拥塞、 PGW重 启或恢复、 PGW上为某个特定 APN进行的恢复、 PGW流量拥塞。
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