WO2010111918A1 - 一种接管失效本地移动锚点的方法和网络设备 - Google Patents

一种接管失效本地移动锚点的方法和网络设备 Download PDF

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Publication number
WO2010111918A1
WO2010111918A1 PCT/CN2010/071214 CN2010071214W WO2010111918A1 WO 2010111918 A1 WO2010111918 A1 WO 2010111918A1 CN 2010071214 W CN2010071214 W CN 2010071214W WO 2010111918 A1 WO2010111918 A1 WO 2010111918A1
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lma
mag
primary
standby
message
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PCT/CN2010/071214
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English (en)
French (fr)
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夏晋伟
吴钦
李洪广
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华为技术有限公司
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Publication of WO2010111918A1 publication Critical patent/WO2010111918A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W8/00Network data management
    • H04W8/02Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/08Mobility data transfer
    • H04W8/085Mobility data transfer involving hierarchical organized mobility servers, e.g. hierarchical mobile IP [HMIP]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W80/00Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/04Network layer protocols, e.g. mobile IP [Internet Protocol]

Definitions

  • the present invention relates to the field of mobile communications, and in particular, to a method and a network device for taking over a local mobile anchor (LMA) to ensure the reliability of a gateway and maintain the continuity of the service of the mobile node.
  • LMA local mobile anchor
  • the mobile node MN (Mobile Node) can only register with one home agent HA (Home Agent).
  • the HA maintains the MN's Binding Cache Entry (BCE). If the HA fails, This will cause the MN's current session to be interrupted, or the session cannot be initiated. To avoid this problem, usually the network side deploys multiple HAs in the same home network. After the current HA1 fails, the backup HA2 and HA3 in the home network take over the work of HA1, and continue to provide mobile services for the MN. Continuity of business on the MN. Two HA backup modes are defined in the existing HA reliability protocol (draft-ietf-mip6-hareliability-04). One is the Home Agent Virtual Switch.
  • the active and standby modes are used.
  • the HA uses the same IP address.
  • the MN and the primary HA negotiate the Security Association (SA).
  • SA is shared between the active and standby HAs, but the IPsec/IKE (IP Security/Internet Key Exchange, IP security) is synchronized between the active and standby HAs. /Internet key exchange)
  • IPsec/IKE IP Security/Internet Key Exchange, IP security
  • IP security IP Security/Internet Key Exchange
  • the status is not within the scope of the protocol.
  • the BCE is backed up between the active and standby HAs.
  • the replacement between the active and standby HAs is transparent to the MN.
  • the other is the Home Agent Hard Switch.
  • the active and standby HAs use different IP addresses.
  • the MN needs to know the backup work between the active and standby HAs.
  • the IPsec/IKE state does not need to be synchronized between the active and standby HAs.
  • the MN needs to establish SAs with the
  • the proxy mobile IPv6 protocol is an extension of the mobile IPv6 protocol.
  • the mobile access gateway (MAG, Mobile Access Gateway) simulates the home link.
  • the MN is notified of the home prefix, so that the MN thinks that it is always at home.
  • the MAG sends the registration message to the LMA (Local Mobility Anchor) instead of the MN.
  • the forwarding address uses the interface address of the MAG, and finally between the MAG and the LMA. Establish a bidirectional tunnel for transmitting MN packets.
  • a heartbeat mechanism is used in the PMIP protocol to detect whether the other party has a reachable route.
  • the LMA or MAG periodically sends a heartbeat request message to the other party, requesting the other party to respond to the heartbeat response message to confirm that the other party's route is reachable.
  • this method is only a detection method, no solution is proposed for the result of the detection failure, and the MAG detects that the other party's route is unreachable, that is, the MAG to LMA transmission network fails, or the LMA fails, so In the case of a transmission network failure, the existing HA reliability method does not apply to the LMA reliability scenario. Summary of the invention
  • the embodiment of the present invention provides a method and a network device for taking over a failed LMA.
  • an embodiment of the present invention provides a method for taking over a failed local mobility anchor point, where the method includes: a standby local mobility anchor point LMA synchronization proxy node cache information of the mobile node MN; the standby LMA acquiring a primary LMA failure Or the network failure message between the primary LMA and the mobile access gateway MAG; the standby LMA sends an LMA replacement message to the MAG to take over the MAG service of the primary LMA proxy, so that the MAG replaces the message according to the LMA. Binding registration to the standby LMA.
  • an embodiment of the present invention provides a network device, where the network device includes: a synchronization unit, configured to synchronize proxy binding cache information of the MN, and an acquiring unit, configured to obtain a primary LMA failure or a primary LMA and a mobile connection.
  • the message that the network fails between the gateways and the MAGs, and the replacement unit is configured to send, to the MAG, an LMA replacement message that takes over the MAG service of the primary LMA, so that the MAG and the network device perform binding registration.
  • the LMA/MAG reliability problem is solved by using a redundancy mechanism, thereby reducing packet data loss from or to the MN, and improving network reliability.
  • the drawings described herein are intended to provide a further understanding of the invention and are not intended to be limiting. among them:
  • 1 is a flowchart of a method according to an embodiment of the present invention
  • 2 is a flow chart of interaction between a MAG and an AAA server according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of signaling interaction of a method according to another embodiment of the present invention.
  • FIGS. 4A-4C are schematic diagrams of LMA redirection messages according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a heartbeat request message with a new extended option according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram of a service agent negotiation between a standby LMA and a primary LMA according to an embodiment of the present invention
  • FIG. 7 is a schematic diagram of a message for replacing a takeover request according to an embodiment of the present invention
  • FIG. 8 is a flowchart of a method interaction according to another embodiment of the present invention.
  • FIG. 9 is a flowchart of a method interaction according to another embodiment of the present invention.
  • FIG. 11 is a schematic structural diagram of a network device according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS
  • the embodiments of the present invention are further described in detail below with reference to the embodiments and drawings.
  • the illustrative embodiments of the present invention and the description thereof are intended to be illustrative of the invention, but are not intended to limit the invention.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • the embodiment of the present invention provides a method for taking over a local mobile anchor point, and the present embodiment will be described in detail below with reference to the accompanying drawings.
  • FIG. 1 is a flowchart of a method according to an embodiment of the present invention.
  • a method for a standby local mobility anchor to take over a local mobility anchor point mainly includes:
  • the standby LMA obtains a message that the primary LMA is invalid or the network between the primary LMA and the mobile access gateway MAG is invalid.
  • the standby LMA sends an LMA replacement message to the MAG to take over the MAG service of the primary LMA proxy, and the MAG performs binding registration with the standby LMA.
  • Embodiments of the present invention are based on Proxy Mobile IP (PMIP), in which there are multiple local mobility anchors LMA in the PMIP domain, except for the primary LMA currently providing mobile support for the mobile node MN, and one or more standby LMAs;
  • the mobile node MN provides the mobile access primary mobile access gateway MAG, and may also have one or more standby MAGs.
  • the mobile node MN does not need to participate in the local mobility anchor LMA reliability scheme, thereby ensuring the LMA. Reliability, and achieve MN's business continuity.
  • the AAA server allocates the primary LMA address to the MAG in the process of authenticating the AAA server to the AAA server, and also allocates the standby LMA address to the MAG.
  • the address of the LMA and the standby LMA is then IKE negotiated with the primary LMA and/or the standby LMA to establish a security association with the primary LMA and/or the standby LMA.
  • the LMA/MAG reliability problem is solved by using a redundancy mechanism, thereby reducing packet data loss from or to the MN, and improving network reliability.
  • the message that the standby LMA obtains the failure of the primary LMA or the network failure between the primary LMA and the mobile access gateway MAG can be implemented in various manners, which will be described below in conjunction with other embodiments and the accompanying drawings.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the embodiment of the present invention further provides a method for taking over a local mobility anchor point.
  • the present embodiment will be described in detail below with reference to the accompanying drawings.
  • FIG. 3 is a schematic diagram of signaling interaction between LMA2 and MAG and LMAl in the LMA reliability scenario, in which the LMA1 fails and the LMA2 is replaced by the LMA2.
  • the MAG uses the LMA heartbeat detection mechanism. (Heartbeat Mechanism) to detect whether the current LMAl is valid, and use the replacement request message to notify the standby LMA to take over the service of the MAG.
  • the method in this embodiment mainly includes:
  • LMAl is the main LMA, providing mobile support for the MN.
  • the MAG performs IKE negotiation with the LMA2 (IKE Exchange) to establish a security association with the LMA2.
  • LMA2 is a standby LMA.
  • LMAl synchronizes MN information (; State Synchronization) to the standby LMA2, and the information includes proxy binding cache information: mobile node identifier (MN-ID), home network prefix (HNP), link layer identifier (link-layer) -ID) Access Technology Type, Timestamp, MAG's Proxy Care-of Address (PCoA), and more.
  • MN-ID mobile node identifier
  • HNP home network prefix
  • link layer identifier link-layer
  • PCoA MAG's Proxy Care-of Address
  • the step 304 may also be:
  • MAG proxy MN performs proxy registration with LMA2.
  • LMA2 is a standby LMA. It has only binding relationship with MAG and does not provide mobile support for MN. At this time, LMA2 binds the cache information from the proxy of the MAG synchronization MN, and does not need to synchronize state with LMA1. See step 304' for details.
  • the MAG and the LMA1 use a HeartBeat message to detect whether the other party has a reachable route.
  • 306 The MAG finds that the LMA1 is invalid through the heartbeat request message, or the network between the MAG and the LMA1 is lost. Effective.
  • the MAG sends a Solicitation message to the LMA2, requesting the LMA2 to take over the LMA1; the LMA2 replies with a request response message to the MAG, and the Status option in the request response message indicates whether it agrees to succeed LMA1.
  • the replacement request message includes information that the LMA1 is invalid or the network between the LMA1 and the MAG is invalid.
  • the change request message may be an LMA redirect request message, requesting the LMA2 to take over the service of the MAG by the LMA1; and the LMA2 replying to the LMA redirect reply message (LMA redirect reply) to the MAG.
  • LMA redirect reply LMA redirect reply
  • a new LMA redirection message is defined, which is used to indicate that the MAG requests the LMA2 to replace the LMA1 after receiving the message, and provides mobile support for the MN.
  • the LMA redirection message includes at least the mobile handover type (MH Type).
  • LMA Redirect Message Data options where the MH Type option is assigned by the IANA (Internet Assigned Numbers Authority); the LRType option is 0 for reserved The LRType option is 1 for the LMA redirect request message (LMARedirect Requset Message), the LRType option is 2 for the LMA Redirect Reply Message (LMA Redirect Reply Message); and the LMA Redirect Message Data option is the content of the LMA redirect message.
  • LMARedirect Requset Message LMA redirect request message
  • LMA Redirect Reply Message LMA Redirect Reply Message
  • LMA Redirect Message Data option is the content of the LMA redirect message.
  • Figure 4B is a schematic diagram of an LMA redirection request message option.
  • the LMAAddress Option option is a failed LMA1 address.
  • Figure 4C is a schematic diagram of an LMA redirect response message option.
  • the Status option is 0 to indicate success;
  • a Status option of 128 indicates a failure.
  • the change request message may be that the LMA2 is requested to succeed LMA1 by extending the proxy binding update message with the active/standby switch identity, and the LMA2 returns a proxy binding reply message to the MAG.
  • the change request message may be a heartbeat request message with a new extended option, requesting LMA2 to take over LMA1; LMA2 replying to heartbeat reply message (HeartBeat reply) to MAG, A new Status option in the heartbeat response message indicates whether or not to agree.
  • the heartbeat request message has a new extended option (LM A Switch Mobility Option). As shown in FIG. 5, the MAG requests the LMA2 to replace the LMA1 after receiving the message, and provides mobile support for the MN.
  • LM A Switch Mobility Option LM A Switch Mobility Option
  • T is the identification position, and the identification position is 1, indicating that the MAG requires the standby LMA to be its primary LMA; the LMA Address is the address of the LMA to be replaced; Status is in the heartbeat response message, indicating that the backup is Whether the LMA accepts to become the main LMA.
  • the MAG After receiving the request response message, the MAG performs binding registration (PMIP Registration) to the LMA2. According to the method of the embodiment, the MAG discovers that the LMA1 is invalid through the heartbeat request message, or sends a change request message to the LMA2 after the network between the MAG and the LMA1 fails, as in the foregoing step 307. After receiving the change request message sent by the MAG, the LMA2 can perform service agent negotiation with the LMA1 before replying to the request response message to the MAG. As shown in FIG. 6, the method includes:
  • the LMA2 sends a replacement takeover request message (SwitchOver Request;) to the LMA1, and carries the PCoA option (with PCo A option), and requests the LAM1 to take over the MAG service instead of the LAM1;
  • SwitchOver Request a replacement takeover request message
  • PCoA option with PCo A option
  • the LMAl sends a changeover response message (SwitchOver Reply;), and agrees to proxy the MAG service by the LMA2.
  • LMA2 can reply to the MAG with a request response message, as in step 308 above.
  • the request response message can be an LMA replacement message (LMA Switch).
  • the replacement takeover request message (SO-REQ) can be extended with the MAG address option to be switched.
  • the LMA1 notifies the LMA1 by replacing the takeover response message, instead of the LMA1 taking over the MAG service.
  • Type 0 indicates SwitchOver Request (SO-REQ);
  • Type 1 indicates SwitchOver Reply (SO-REP);
  • Type 2 indicates SwitchBack Request (SB-REQ) );
  • Type 3 means SwitchBack Reply ( SB-REP);
  • Type 4 means Switch Complete ( SW-COMP).
  • the LMA/MAG reliability problem is solved by using a redundancy mechanism, thereby reducing packet data loss from or to the MN, and improving network reliability.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • the embodiment of the present invention further provides a method for taking over a local mobility anchor point.
  • the present embodiment will be described in detail below with reference to the accompanying drawings.
  • FIG. 8 is a schematic diagram of signaling interaction between LMA2 and MAG and LMAl in the LMA reliability scenario, in which the LMA1 fails, and the LMA2 is replaced by the LMA1.
  • the LMA heartbeat detection mechanism is still used (Heartbeat)
  • the LMA1 sends a replacement request to the LMA2, and actively requests the LMA2 to take over the service of the MAG instead of the MAG transmitting the handover request.
  • the method in this embodiment mainly includes:
  • LMA1 discovers that the network with the MAG fails through the heartbeat request message, and the LMA1 sends the message to the LMA2.
  • the switchback request message (LoopBack Request) is required to replace the LAM1 to take over the service of the MAG.
  • the replacement request message includes information that the LMA1 is invalid or the network between the LMA1 and the MAG is invalid.
  • LMA2 sends a changeover response message (SwitchBack Reply) to LMAl, and agrees that LMA2 will proxy the service of the MAG.
  • the LMA2 sends an LMA change message (LM A Switch) to the MAG to announce that the MAG can be proxied by the LMA2.
  • LMA change message LM A Switch
  • MAG performs binding registration (PMIP Registration) with LMA2.
  • the LMA/MAG reliability problem is solved by using a redundancy mechanism, thereby reducing packet data loss from or to the MN, and improving network reliability.
  • Embodiment 4 is a diagrammatic representation of Embodiment 4:
  • the embodiment of the present invention further provides a method for taking over a local mobility anchor point.
  • the present embodiment will be described in detail below with reference to the accompanying drawings.
  • FIG. 9 is a schematic diagram of signaling interaction between LMA2 and MAG and LMAl in the LMA reliability scenario, in which the LMA1 fails and the LMA2 is replaced by the LMA2.
  • the LMA2 detects the LMA1 by using an internal mechanism. Invalid, notify the MAG to perform proxy binding registration.
  • the method in this embodiment mainly includes:
  • LMA2 uses internal message detection LMA1 failure.
  • the LMA2 sends a home switch message (HA Switch message) to the MAG, with an IPv6 address of the standby LMA2, or an IPv4 address (SN, LMA set with IPv4/IPv6 Add).
  • HA Switch message home switch message
  • SN IPv4 address
  • IPv4/IPv6 Add IPv4 address
  • the MAG sends a proxy registration request message to the LMA2 in the home address switching message, and performs binding registration (PMIP Registration) to the LMA2.
  • the LMA/MAG reliability problem is solved by using a redundancy mechanism, thereby reducing packet loss and improving network reliability.
  • Embodiment 5 is a diagrammatic representation of Embodiment 5:
  • the embodiment of the present invention further provides a method for the standby local mobility anchor to take over the local mobility anchor point.
  • FIG. 10 is a flowchart of interaction between a MAG and LMA1 and LMA2 in an LMA reliability scenario according to an embodiment of the present invention.
  • the active and standby LMAs use the same IP address, that is, LMA1 and LMA2 share an IP address, but LMA1
  • the binding list information of the MN is not completely synchronized with the LMA2.
  • the LMA2 uses the internal mechanism to detect the failure of the LMA1, and then advertises the MAG.
  • the MAG is required to register in batches.
  • the binding list of the MN is established on the LMA2. Referring to FIG. 10, the method in this embodiment includes:
  • LMA2 and LMA1 use virtual mode to detect if LMA1 is invalid.
  • LMA2 When LMA2 detects that LMA1 is invalid, LMA2 sends a Switch Notify message to the MAG, with an IPv6 address of the standby LMA2, or an IPv4 address.
  • the Switch Notify message may be a home agent handover message HA Switch message, or a general report message, or a heartbeat message.
  • the MAG sends a bulk proxy registration request message (PMIP Bulk) to the LMA2 in the handover report message.
  • PMIP Bulk bulk proxy registration request message
  • LMA2 establishes the binding list of the MN.
  • the LMA/MAG reliability problem is solved by using a redundancy mechanism, thereby reducing packet loss and improving network reliability.
  • FIG. 11 is a schematic structural diagram of a network device according to the embodiment.
  • the network device in this embodiment mainly includes: a synchronization unit 111, an obtaining unit 112, and a replacement unit 113, where:
  • the synchronization unit 111 is configured to synchronize the cache information of the proxy of the mobile node MN from the primary LMA or MAG. See steps 304, 304' for details.
  • the obtaining unit 112 is configured to obtain the failure information of the primary LMA or the network failure between the primary LMA and the mobile access gateway MAG.
  • the obtaining unit 112 is configured to implement the functions of the foregoing steps 307, 806, 905, and 1003, and details are not described herein again.
  • the replacing unit 113 is configured to send, to the MAG, an LMA replacement message that takes over the MAG service of the primary LMA proxy, so that the MAG performs binding registration with the network device.
  • the replacement unit 113 is configured to implement the functions of the foregoing steps 308, 807, 906, and 1004, and details are not described herein again.
  • the obtaining unit 112 is configured to receive the bearer sent by the mobile access gateway MAG.
  • the replacement request message indicated by the LMA handover confirms that the primary LMA is invalid or the network between the primary LMA and the mobile access gateway MAG is invalid according to the replacement request message. See step 307 above for details.
  • the network device further includes:
  • the first negotiating unit 114 is configured to send, to the primary LMA, a replacement takeover request message requesting replacement of the MAG service by the primary LMA; and receiving a replacement takeover response message sent by the primary LMA to agree to be taken over by the standby LMA. See steps 601, 602 above for details.
  • the obtaining unit 112 is configured to receive a replacement request message sent by the primary LMA to replace the primary LMA to take over the MAG service, and confirm, according to the replacement request message, that the primary LMA is invalid or between the primary LMA and the mobile access gateway MAG.
  • the network is invalid. See step 806 above for details.
  • the network device further includes:
  • the second negotiating unit 115 is configured to send, to the primary LMA, a replacement takeover response message that agrees to take over the MAG service. See step 807 above for details.
  • the obtaining unit 112 is configured to detect the failure of the primary LMA or the network failure between the primary LMA and the MAG by using an internal message, as described in step 905 above.
  • the replacing unit 113 is configured to send a home agent switching message with an IPv6 address or an IPv4 address of the standby LMA to the MAG. For details, refer to the foregoing step 906.
  • the network device shares an IP address with the primary LMA.
  • the obtaining unit 112 is configured to detect, by using a virtual mode, a primary LMA failure or a network between the primary LMA and the MAG. For failure, see step 1003 above.
  • the replacing unit 113 is configured to send a handover report message with an IPv6 address or an IPv4 address of the standby LMA to the MAG.
  • the network device further includes a binding unit 116, configured to receive a bulk proxy registration request sent by the MAG, and establish a binding list of the mobile node MN. For details, see step 1005.
  • the network device in this embodiment may be an alternate local mobility anchor LMA, which is used to implement the steps in the foregoing method.
  • LMA alternate local mobility anchor
  • the LMA/MAG reliability problem is solved by using a redundancy mechanism, thereby reducing packet data loss from or to the MN, and improving network reliability.
  • the steps of a method or algorithm described in connection with the embodiments disclosed herein may be implemented directly in hardware, a software module executed by a processor, or a combination of both.
  • the software module can be placed in random access memory (RAM), memory, read only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or technical field. Any other form of storage medium known.

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Description

一种接管失效本地移动锚点的方法和网络设备 本申请要求于 2009年 3月 31 日提交中国专利局、 申请号为 200910130508.2、 发明 名称为"一种接管失效本地移动锚点的方法和网络设备"的中国专利申请的优先权, 其全 部内容通过引用结合在本申请中。 技术领域 本发明涉及移动通信领域, 尤其涉及一种保障网关可靠性, 并保持移动节点业务 连续性的一种接管失效本地移动锚点(LMA, Local Mobile Anchor)的方法和网络设备。 背景技术 移动 IP (Mobile IP, Mobile Internet Protocol) 是 IP移动支持协议, 它是结合互联 网和移动通信以实现移动计算与联网的关键协议。 根据版本号的不同, 移动 IP可以分 为移动 IPv4和移动 IPv6。
在移动 IP v6中, 移动节点 MN (Mobile Node) 只能向一个家乡代理 HA (Home Agent) 注册, HA上维护了 MN的绑定缓存条目 (BCE, Binding Cache Entry), 如果 HA出现了故障, 会导致 MN的当前会话中断, 或者无法发起会话。 为避免该问题, 通 常网络侧会在同一家乡网络中部署多个 HA,在 MN当前的 HA1失效后, 由家乡网络中 的备份 HA2、 HA3来接替 HA1的工作, 继续为 MN提供移动服务, 保持 MN上业务的 连续性。 在现有 HA可靠性协议 (draft-ietf-mip6-hareliability-04) 中定义了两种 HA备 份模式, 一种是家乡代理虚拟切换 (Home Agent Virtual Switch), 在这种备份模式下, 主备 HA使用相同的 IP地址, MN和主用 HA协商安全联盟( Security Association, SA), 该 SA在主备 HA间共享,但主备 HA间同步 IPsec/IKE(IP Security/Internet Key Exchange, IP安全 /因特网密钥交换) 状态不在协议范围内, 主备 HA间备份 BCE, 主备 HA间的 接替工作对 MN透明; 另外一种是家乡代理硬切换 (Home Agent Hard Switch), 在这种 备份模式下, 主备 HA使用不同的 IP地址, MN需要知道主备 HA 间的接替工作, IPsec/IKE状态不需要在主备 HA间同步, MN需要预先和主备 HA各自建立 SA, 主备 HA间的接替工作对 MN不透明。
代理移动 IPv6协议是对移动 IPv6协议的一种扩展, 和移动 IPv6不同的是, 在代 理移动 IPv6协议中, 移动接入网关 (MAG, Mobile Access Gateway) 模拟家乡链路, 向 MN通告家乡前缀,使 MN以为自己始终在家乡链路; MAG代替 MN向 LMA (Local Mobility Anchor, 本地移动锚点) 发送注册报文, 转交地址使用 MAG的接口地址, 最 终在 MAG和 LMA间建立一条双向隧道用于传输 MN的报文。
发明人在实现本发明的过程中发现,为了保持 MN的业务连续性,在 PMIP协议中, 采用了一种心跳机制(Heartbeat Mechanism)来侦测对方是否路由可达。 LMA或者 MAG 会周期性的发送心跳请求消息给对方, 要求对方回应心跳应答消息, 以证实对方路由可 达。然而, 由于该方法只是一种检测方法,而对检测失败的结果没有提出任何解决方案, 而且 MAG侦测到对方路由不可达存在两种情况, 即 MAG到 LMA传输网络失效, 或 者 LMA失效, 因此, 当传输网络失效的情形下, 现有的 HA可靠性方法不适用于 LMA 可靠性的场景。 发明内容
为了解决代理移动 IP内的 LMA可靠性问题,本发明实施例提供一种接管失效 LMA 的方法和网络设备。
一方面, 本发明实施例提供了一种接管失效本地移动锚点的方法, 所述方法包括: 备用本地移动锚点 LMA同步移动节点 MN的代理绑定缓存信息; 所述备用 LMA获取 主 LMA失效或者主 LMA与移动接入网关 MAG之间网络失效的消息; 所述备用 LMA 向所述 MAG发送接管所述主 LMA代理所述 MAG业务的 LMA更换消息,使所述 MAG 根据所述 LMA更换消息向所述备用 LMA进行绑定注册。
另一方面, 本发明实施例提供了一种网络设备, 所述网络设备包括: 同步单元, 用于同步 MN的代理绑定缓存信息; 获取单元, 用于获取主 LMA失效或者主 LMA与 移动接入网关 MAG之间网络失效的消息;更换单元,用于向 MAG发送接管所述主 LMA 代理所述 MAG业务的 LMA更换消息, 以使所述 MAG与所述网络设备进行绑定注册。
本发明实施例在 PMIP场景下, 利用冗余机制解决了 LMA/MAG可靠性问题, 进 而减少了来自或发往 MN的分组数据包丢失, 提高了网络的可靠性。 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, 并不构成对本发明的限定。 其 中:
图 1为本发明实施例的方法流程图; 图 2为本发明实施例中 MAG向 AAA服务器进行认证的交互流程图;
图 3为本发明另一实施例的方法的信令交互示意图;
图 4A—图 4C为本发明实施例中 LMA重定向消息示意图;
图 5为本发明实施例中带有新的扩展选项的心跳请求消息示意图;
图 6为本发明实施例中备用 LMA与主 LMA进行业务代理协商的示意图; 图 7为本发明实施例中更换接管请求消息示意图;
图 8为本发明另一实施例的方法交互流程图;
图 9为本发明另一实施例的方法交互流程图;
图 10本发明另一实施例的方法交互流程图;
图 11为本发明实施例的网络设备结构示意图。 具体实施方式 为使本发明实施例的目的、技术方案和优点更加清楚明白,下面结合实施例和附图, 对本发明实施例做进一步详细说明。 在此, 本发明的示意性实施例及其说明用于解释本 发明, 但并不作为对本发明的限定。
实施例一:
本发明实施例提供一种接管失效本地移动锚点的方法, 以下结合附图对本实施例进 行详细说明。
图 1为本发明实施例的方法流程图, 请参照图 1, 本发明实施例的备用本地移动锚 点接管失效本地移动锚点的方法主要包括:
101: 备用本地移动锚点 LMA同步移动节点 MN的代理绑定缓存信息;
102: 所述备用 LMA获取主 LMA失效或者主 LMA与移动接入网关 MAG之间网 络失效的消息;
103: 所述备用 LMA向所述 MAG发送接管所述主 LMA代理所述 MAG业务的 LMA更换消息, 使所述 MAG向所述备用 LMA进行绑定注册。
本发明实施例基于代理移动 IP (PMIP), 在 PMIP域存在多个本地移动锚点 LMA, 除去当前为移动节点 MN提供移动支持的主 LMA, 还有一个或者多个备用 LMA; 并且 除去当前为移动节点 MN提供移动接入的主移动接入网关 MAG, 还可以有一个或者多 个备用 MAG, 本实施例不需要移动节点 MN参与到本地移动锚点 LMA可靠性方案中, 即可保证 LMA的可靠性, 并实现 MN的业务连续。 在本实施例中, 移动接入网关 MAG在向 AAA服务器认证过程中, AAA服务器不 仅分配主 LMA地址,同时也分配备用 LMA地址给 MAG,也就是说, MAG先通过 AAA 服务器的认证, 获得主 LMA和备用 LMA的地址, 再同主 LMA和 /或者备用 LMA进行 IKE协商, 建立与所述主 LMA和 /或所述备用 LMA之间的安全联盟。
本发明实施例在 PMIP场景下, 利用冗余机制解决了 LMA/MAG可靠性问题, 进而 减少了来自或发往 MN的分组数据包丢失, 提高了网络的可靠性。
在本实施例中, 备用 LMA获取主 LMA失效或者主 LMA与移动接入网关 MAG之 间网络失效的消息可以通过多种方式实现, 以下结合其他实施例和附图对此加以说明。
实施例二:
本发明实施例还提供一种接管失效本地移动锚点的方法, 以下结合附图对本实施例 进行详细说明。
图 3为本发明实施例在 LMA可靠性场景下, LMA1失效并由 LMA2接替 LMA1工 作, LMA2与 MAG、 LMAl之间的信令交互示意图, 在本实施例中, 是由 MAG采用 LMA心跳检测机制 (Heartbeat Mechanism) 来检测当前 LMAl是否有效, 并采用更换 请求消息通告备用 LMA接管 MAG的业务。 请参照图 3, 本实施例的方法主要包括:
301: MAG同 LMA1进行 IKE协商 (IKE Exchange),建立与 LMAl之间的安全联盟。 302: MAG代理 MN向 LMA1进行代理注册 (PMIP Registration)。 LMAl为主 LMA, 为 MN提供移动支持。
303: MAG同 LMA2进行 IKE协商 (IKE Exchange),建立与 LMA2之间的安全联盟。 LMA2为备用 LMA。
304: LMAl向备用 LMA2同步 MN的信息 (; State Synchronization),该信息中包括代 理绑定缓存信息: 移动节点标识 (MN-ID )、 家乡网络前缀 (HNP )、 链路层标识 (link-layer-ID) 接入技术类型(Access Technology Type)、 时间戳(Timestamp)、 MAG 的代理转交地址 (PCoA) 等等。
根据本发明的另一个实施例, 该步骤 304也可以是:
MAG代理 MN向 LMA2进行代理注册 (PMIP Registration), LMA2为备用 LMA, 它与 MAG只有绑定关系, 暂不为 MN提供移动支持。 此时, LMA2从 MAG同步 MN 的代理绑定缓存信息, 而不需要与 LMA1进行状态同步。 详见步骤 304'。
305: MAG同 LMA1利用心跳消息 (HeartBeat message)侦测对方是否路由可达。 306: MAG通过心跳请求消息发现 LMA1失效, 或者 MAG与 LMA1之间网络失 效。
307-308: MAG向 LMA2发送更换请求消息 (Solicitation message),请求 LMA2接替 LMA1 ; LMA2回复请求应答消息给 MAG, 该请求应答消息中的 Status选项表示是否同 意接替 LMA1。
根据本实施例,该更换请求消息中包含了 LMA1失效或者 LMA1与 MAG之间的网 络失效的信息。
根据本发明的一个实施例, 该更换请求消息可以是 LMA 重定向请求消息 (LMA redirect request), 请求 LMA2接替 LMA1接管 MAG的业务; LMA2回复 LMA重定向 应答消息 (LMA redirect reply)给 MAG。
其中, 定义新的 LMA重定向消息, 用于表示 MAG要求 LMA2接收到该消息后替 换 LMA1 , 为 MN提供移动支持, 如图 4A所示, 该 LMA重定向消息至少包含了移动 切换类型 (MH Type)、 本地路由类型 (L.R.Type) 以及 LMA重定向消息数据 (LMA Redirect Message Data)选项, 其中, MH Type选项由 IANA ( Internet Assigned Numbers Authority, 互联网地址指派机构) 分配; L.R.Type选项为 0表示保留, L.R.Type选项为 1表示 LMA重定向请求消息(LMARedirect Requset Message), L.R.Type选项为 2表示 LMA重定向应答消息( LMA Redirect Reply Message ); LMA Redirect Message Data选项 为 LMA重定向消息的内容。
图 4B为 LMA重定向请求消息选项示意图, 在图 4B中, LMAAddress Option选项 为失效的 LMA1地址。
图 4C为 LMA重定向应答消息选项示意图,在图 4C中, Status选项为 0表示成功;
Status选项为 128表示失败。
根据本发明的另一个实施例, 该更换请求消息可以是通过扩展带有主备切换标识的 代理绑定更新消息, 请求 LMA2接替 LMA1, LMA2返回代理绑定答复消息给 MAG。
根据本发明的另一个实施例, 该更换请求消息可以是心跳请求消息 (HeartBeat request), 其中带有新的扩展选项, 请求 LMA2接替 LMA1 ; LMA2回复心跳应答消息 (HeartBeat reply)给 MAG, 在该心跳应答消息中新增 Status选项表示是否同意。
其中, 心跳请求消息带有新的扩展选项 (LM A Switch Mobility Option), 如图 5所 示, MAG要求 LMA2接收到该消息后替换 LMA1, 为 MN提供移动支持。
在图 5中, T为标识位置, 该标识位置为 1, 则表示 MAG要求备用 LMA成为它主 LMA; LMA Address为所要替换的 LMA的地址; Status在心跳应答消息中, 表明备用 LMA是否接受成为主 LMA。
309: MAG接收到请求应答消息后, 向 LMA2进行绑定注册 (PMIP Registration)。 根据本实施例的方法, MAG通过心跳请求消息发现 LMA1 失效, 或者 MAG与 LMA1之间网络失效后, 向 LMA2发送更换请求消息, 如前述步骤 307。 LMA2在接收 到 MAG发送的更换请求消息后, 在向 MAG回复请求应答消息之前, 还可以与 LMA1 进行业务代理协商, 如图 6所示, 包括:
601: LMA2向 LMA1发送更换接管请求消息 (SwitchOver Request;), 携带 PCoA选 项 ( with PCo A option), 要求替代 LAM1接管 MAG的业务;
602: LMAl发送更换接管应答消息 (SwitchOver Reply;), 同意由 LMA2来代理 MAG 的业务。
此时, LMA2即可向 MAG回复请求应答消息, 如前述步骤 308。 该请求应答消息 可以是 LMA更换消息 ( LMA Switch )。
其中, 本实施例可以扩展更换接管请求消息 (SO-REQ), 使其带有要切换的 MAG 地址选项 (MAG Address Option), 由 LMA2通过更换接管应答消息通告 LMA1 , 代替 LMA1接管 MAG的业务。 如图 7所示, 在该扩展的更换接管请求消息中, Type为 0表 示 SwitchOver Request ( SO-REQ); Type为 1表示 SwitchOver Reply ( SO-REP); Type 为 2表示 SwitchBack Request ( SB-REQ); Type为 3表示 SwitchBack Reply ( SB-REP); Type为 4表示 Switch Complete ( SW-COMP)。
本发明实施例在 PMIP场景下, 利用冗余机制解决了 LMA/MAG可靠性问题, 进而 减少了来自或发往 MN的分组数据包丢失, 提高了网络的可靠性。
实施例三:
本发明实施例还提供一种接管失效本地移动锚点的方法, 以下结合附图对本实施例 进行详细说明。
图 8为本发明实施例在 LMA可靠性场景下, LMA1失效并由 LMA2接替 LMA1工 作, LMA2与 MAG、 LMAl之间的信令交互示意图, 在本实施例中, 依然采用 LMA心 跳检测机制(Heartbeat Mechanism)来检测当前 LMAl是否有效, 但与实施例二不同的 是, 该实施例是由 LMA1向 LMA2发送更换请求, 主动请求 LMA2接管 MAG的业务, 而不是 MAG发送切换请求。 请参照图 8, 本实施例的方法主要包括:
801-805: 与实施例二的步骤 301-305相同, 在此不再赘述。
806: LMA1通过心跳请求消息发现与 MAG的网络失效, LMA1 向 LMA2发送更 换请求消息 ( SwitchBack Request), 要求 LMA2替代 LAM1接管 MAG的业务。
根据本实施例,该更换请求消息中包含了 LMA1失效或者 LMA1与 MAG之间的网 络失效的信息。
807: LMA2发送更换接管应答消息 (SwitchBack Reply) 给 LMAl , 同意由 LMA2 来代理 MAG的业务。
808: LMA2向 MAG发送 LMA更换消息 (LM A Switch), 通告 MAG它的业务可 以由 LMA2进行代理。
809: MAG向 LMA2进行绑定注册 (PMIP Registration )。
本发明实施例在 PMIP场景下, 利用冗余机制解决了 LMA/MAG可靠性问题, 进而 减少了来自或发往 MN的分组数据包丢失, 提高了网络的可靠性。
实施例四:
本发明实施例还提供一种接管失效本地移动锚点的方法, 以下结合附图对本实施例 进行详细说明。
图 9为本发明实施例在 LMA可靠性场景下, LMA1失效并由 LMA2接替 LMA1工 作, LMA2与 MAG、 LMAl之间的信令交互示意图, 在本实施例中, LMA2采用内部 机制侦测到 LMA1失效, 通知 MAG进行代理绑定注册。 请参照图 9, 本实施例的方法 主要包括:
901-904/904' : 与实施例二的步骤 301-304/304'相同, 在此不再赘述。
905: LMA2利用内部消息侦测 LMA1失效。
906: LMA2发送家乡地址切换消息(HA Switch message)给 MAG,带有备用 LMA2 的 IPv6地址, 或者 IPv4地址 ( SN,LMA set with IPv4/IPv6 Add )。
907: MAG向家乡地址切换消息中的 LMA2发送代理注册请求消息, 向 LMA2进 行绑定注册 (PMIP Registration )。
本发明实施例在 PMIP场景下, 利用冗余机制解决了 LMA/MAG可靠性问题, 进而 减少了数据包丢失, 提高了网络的可靠性。
实施例五:
本发明实施例还提供一种备用本地移动锚点接管失效本地移动锚点的方法, 以下结 合附图对本实施例进行详细说明。
图 10为本发明实施例在 LMA可靠性场景下 MAG与 LMA1、 LMA2之间的交互流 程图, 主备 LMA使用相同的 IP地址, 即 LMA1和 LMA2共用一个 IP地址, 但 LMA1 和 LMA2不完全同步 MN的绑定列表信息。 LMA2采用内部机制侦测到 LMA1失效, 然后通告 MAG, 要求 MAG进行批量注册, LMA2上建立 MN的绑定列表。 请参照图 10, 本实施例的方法包括:
1001-1002: 与实施例二的步骤 301-302相同, 在此不再赘述。
1003: LMA2和 LMA1采用虚拟模式 (virtual mode) 检测 LMA1是否失效。
1004: 当 LMA2 检测到 LMA1 失效, LMA2 发送切换报告消息 (Switch Notify message) 给 MAG, 带有备用 LMA2的 IPv6地址, 或者 IPv4地址。
在本实施例中, Switch Notify消息可以是家乡代理切换消息 HA Switch message, 或 者普通报告消息 general notification message, 或者心跳消息等等。
1005: MAG向切换报告消息中的 LMA2, 发送批量代理注册请求消息(PMIP Bulk
Re-registration), LMA2建立 MN的绑定列表。
本发明实施例在 PMIP场景下, 利用冗余机制解决了 LMA/MAG可靠性问题, 进而 减少了数据包丢失, 提高了网络的可靠性。
实施例六:
本发明实施例还提供一种网络设备, 以下结合附图对本实施例进行详细说明。 图 11为本实施例的网络设备结构示意图, 请参照图 11, 本实施例的网络设备主要 包括: 同步单元 111、 获取单元 112和更换单元 113, 其中:
同步单元 111用于从主 LMA或 MAG同步移动节点 MN的代理绑定缓存信息。 详 见步骤 304、 304'。
获取单元 112用于获取主 LMA失效或者主 LMA与移动接入网关 MAG之间网络 失效信息。 该获取单元 112用于实现前述步骤 307、 806、 905、 1003的功能, 在此不再 赘述。更换单元 113用于向 MAG发送接管所述主 LMA代理所述 MAG业务的 LMA更 换消息, 以使所述 MAG与该网络设备进行绑定注册。 该更换单元 113用于实现前述步 骤 308、 807、 906、 1004的功能, 在此不再赘述。
根据本发明一个实施例, 获取单元 112 用于接收移动接入网关 MAG发送的携带
LMA切换指示的更换请求消息, 根据该更换请求消息确认主 LMA失效或者主 LMA与 移动接入网关 MAG之间网络失效。 详见前述步骤 307。 在本实施例中, 所述网络设备 还包括:
第一协商单元 114,用于向主 LMA发送要求替代主 LMA接管 MAG业务的更换接 管请求消息;接收主 LMA发送的同意由备用 LMA接管 MAG业务的更换接管应答消息。 详见前述步骤 601、 602。
根据本发明另一个实施例,获取单元 112用于接收主 LMA发送的指示替代主 LMA 接管 MAG业务的更换请求消息,根据该更换请求消息确认主 LMA失效或者主 LMA与 移动接入网关 MAG之间网络失效。 详见前述步骤 806。 在本实施例中, 所述网络设备 还包括:
第二协商单元 115, 用于向主 LMA发送同意接管 MAG业务的更换接管应答消息。 详见前述步骤 807。
根据本发明另一个实施例,获取单元 112用于利用内部消息侦测到主 LMA失效或 者主 LMA与 MAG之间网络失效, 详见前述步骤 905。 在本实施例中, 更换单元 113 用于向所述 MAG发送带有备用 LMA的 IPv6地址或 IPv4地址的家乡代理切换消息, 详见前述步骤 906。
根据本发明的另一个实施例, 所述网络设备与所述主 LMA共用一个 IP地址, 在 本实施例中, 获取单元 112用于采用虚拟模式检测到主 LMA失效或者主 LMA与 MAG 之间网络失效, 详见前述步骤 1003。 在本实施例中, 更换单元 113用于向所述 MAG发 送带有备用 LMA的 IPv6地址或 IPv4地址的切换报告消息, 详见前述步骤 1004。 在本 实施例中, 网络设备还包括绑定单元 116, 用于接收所述 MAG发送的批量代理注册请 求, 建立移动节点 MN的绑定列表, 详见前述步骤 1005。
本实施例的网络设备可以是备用本地移动锚点 LMA, 用于实现前述实施例的方法 中的各步骤, 在前述实施例中, 已经对各步骤进行了详细说明, 在此不再赘述。
本发明实施例在 PMIP场景下, 利用冗余机制解决了 LMA/MAG可靠性问题, 进而 减少了来自或发往 MN的分组数据包丢失, 提高了网络的可靠性。
结合本文中所公开的实施例描述的方法或算法的步骤可以直接用硬件、处理器执行 的软件模块, 或者二者的结合来实施。 软件模块可以置于随机存储器 (RAM)、 内存、 只读存储器 (ROM)、 电可编程 ROM、 电可擦除可编程 ROM、 寄存器、 硬盘、 可移动 磁盘、 CD-ROM、 或技术领域内所公知的任意其它形式的存储介质中。
以上所述的具体实施例, 对本发明的目的、 技术方案和有益效果进行了进一步详细 说明, 所应理解的是, 以上所述仅为本发明的具体实施例而已, 并不用于限定本发明的 保护范围, 凡在本发明的精神和原则之内, 所做的任何修改、 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
1、 一种接管失效本地移动锚点的方法, 其特征在于, 所述方法包括:
备用本地移动锚点 LMA同步移动节点 MN的代理绑定缓存信息;
所述备用 LMA获取主 LMA失效或者主 LMA与移动接入网关 MAG之间网络失 效的消息;
所述备用 LMA向所述 MAG发送接管所述主 LMA代理所述 MAG业务的 LMA更 换消息, 使所述 MAG根据所述 LMA更换消息向所述备用 LMA进行绑定注册。
2、 根据权利要求 1所述的方法, 其特征在于, 所述备用 LMA同步 MN的代理绑 定缓存信息包括:
备用 LMA从所述主 LMA同步所述移动节点 MN的代理绑定缓存信息; 或 备用 LMA从所述 MAG同步所述移动节点 MN的代理绑定缓存信息。
3、根据权利要求 2所述的方法, 其特征在于, 所述备用 LMA获取主 LMA失效或 者主 LMA与移动接入网关 MAG之间网络失效的消息包括:
备用 LMA接收所述 MAG发送的携带 LMA切换指示的更换请求消息, 根据该更 换请求消息确认所述主 LMA失效, 或者所述主 LMA与所述 MAG之间的网络失效。
4、 根据权利要求 3所述的方法, 其特征在于: 所述备用 LMA接收所述 MAG发 送的携带 LMA切换指示的更换请求消息之后包括:
备用 LMA向主 LMA发送要求替代主 LMA接管所述 MAG业务的更换接管请求 消息;
备用 LMA接收主 LMA发送的同意由备用 LMA接管所述 MAG业务的更换接管 应答消息。
5、根据权利要求 2所述的方法, 其特征在于, 所述备用 LMA获取主 LMA失效或 者主 LMA与移动接入网关 MAG之间网络失效的消息包括:
备用 LMA接收主 LMA发送的指示替代主 LMA接管 MAG业务的更换请求消息, 根据该更换请求消息确认所述主 LMA失效,或者所述主 LMA与所述 MAG之间的网络 失效。
6、根据权利要求 5所述的方法, 其特征在于, 所述备用 LMA接收主 LMA发送的 指示替代主 LMA接管 MAG业务的更换请求消息之后包括:
备用 LMA向主 LMA发送同意接管 MAG业务的更换接管应答消息。
7、根据权利要求 2所述的方法, 其特征在于, 所述备用 LMA获取主 LMA失效或 者主 LMA与移动接入网关 MAG之间网络失效的消息包括:
备用 LMA利用内部消息侦测到主 LMA失效或者主 LMA与 MAG之间网络失效。
8、 根据权利要求 7所述的方法, 其特征在于, 所述备用 LMA向所述 MAG发送 接管所述主 LMA代理所述 MAG业务的 LMA更换消息包括:
备用 LMA向所述 MAG发送带有备用 LMA的 IPv6地址或 IPv4地址的家乡代理 切换消息。
9、根据权利要求 2所述的方法, 其特征在于, 所述主 LMA与所述备用 LMA共用 一个 IP地址, 所述备用 LMA获取主 LMA失效或者主 LMA与 MAG之间网络失效的 消息包括:
备用 LMA采用虚拟模式检测到主 LMA失效或者主 LMA与 MAG之间网络失效。
10、 根据权利要求 9所述的方法, 其特征在于, 所述备用 LMA向所述 MAG发送 接管所述主 LMA代理所述 MAG业务的 LMA更换消息包括:
备用 LMA向所述 MAG发送带有备用 LMA的 IPv6地址或 IPv4地址的切换报告 消息。
11、 根据权利要求 10所述的方法, 其特征在于, 备用 LMA向所述 MAG发送带 有备用 LMA的 IPv6地址或 IPv4地址的切换报告消息之后包括:
接收所述 MAG发送的批量代理注册请求, 建立移动节点 MN的绑定列表。
12、 一种网络设备, 其特征在于, 所述网络设备包括:
同步单元, 用于同步 MN的代理绑定缓存信息;
获取单元, 用于获取主 LMA失效或者主 LMA与移动接入网关 MAG之间网络失 效的消息;
更换单元, 用于向 MAG发送接管所述主 LMA代理所述 MAG业务的 LMA更换 消息, 以使所述 MAG与所述网络设备进行绑定注册。
13、 根据权利要求 12所述的网络设备, 其特征在于:
所述同步单元具体用于从主 LMA或 MAG同步 MN的代理绑定缓存信息。
14、 根据权利要求 13所述的网络设备, 其特征在于:
所述获取单元具体用于接收 MAG发送的携带 LMA切换指示的更换请求消息, 根 据该更换请求消息确认主 LMA失效或者主 LMA与 MAG之间网络失效。
15、 根据权利要求 14所述的网络设备, 其特征在于, 所述网络设备还包括: 第一协商单元, 用于向主 LMA发送要求替代主 LMA接管 MAG业务的更换接管 请求消息; 接收主 LMA发送的同意由备用 LMA接管 MAG业务的更换接管应答消息。
16、 根据权利要求 13所述的网络设备, 其特征在于:
所述获取单元具体用于接收主 LMA发送的指示替代主 LMA接管 MAG业务的更 换请求消息,根据该更换请求消息确认主 LMA失效或者主 LMA与 MAG之间网络失效。
17、 根据权利要求 16所述的网络设备, 其特征在于, 所述网络设备还包括: 第二协商单元, 用于向主 LMA发送同意接管 MAG业务的更换接管应答消息。
18、 根据权利要求 13所述的网络设备, 其特征在于:
所述获取单元具体用于利用内部消息侦测到主 LMA失效或者主 LMA与 MAG之 间网络失效;
所述更换单元具体用于向所述 MAG发送带有备用 LMA的 IPv6地址或 IPv4地址 的家乡代理切换消息。
19、根据权利要求 13所述的网络设备, 其特征在于, 所述网络设备与所述主 LMA 共用一个 IP地址, 其中:
所述获取单元具体用于采用虚拟模式检测到主 LMA失效或者主 LMA与 MAG之 间网络失效;
所述更换单元具体用于向所述 MAG发送带有备用 LMA的 IPv6地址或 IPv4地址 的切换报告消息。
20、 根据权利要求 19所述的网络设备, 其特征在于, 所述网络设备还包括: 绑定单元,用于接收所述 MAG发送的批量代理注册请求,建立移动节点 MN的绑 定列表。
PCT/CN2010/071214 2009-03-31 2010-03-23 一种接管失效本地移动锚点的方法和网络设备 WO2010111918A1 (zh)

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