WO2009003406A1 - Procédé et système de transfert sans coupure pour terminal ip mobile de serveur mandataire - Google Patents

Procédé et système de transfert sans coupure pour terminal ip mobile de serveur mandataire Download PDF

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Publication number
WO2009003406A1
WO2009003406A1 PCT/CN2008/071489 CN2008071489W WO2009003406A1 WO 2009003406 A1 WO2009003406 A1 WO 2009003406A1 CN 2008071489 W CN2008071489 W CN 2008071489W WO 2009003406 A1 WO2009003406 A1 WO 2009003406A1
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WO
WIPO (PCT)
Prior art keywords
terminal
message
router
address
default
Prior art date
Application number
PCT/CN2008/071489
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English (en)
Chinese (zh)
Inventor
Yuankui Zhao
Original Assignee
Huawei Technologies Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2009003406A1 publication Critical patent/WO2009003406A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/04—Network layer protocols, e.g. mobile IP [Internet Protocol]

Definitions

  • the present invention relates to the field of mobile communications, and more particularly to a method for implementing a smooth handover of a Proxy Mobi le IP (PMIP) terminal under an IPv6 architecture, and a smooth handover system.
  • PMIP Proxy Mobi le IP
  • a neighbor discovery mechanism occurs. Specifically, when a PMIP terminal enters a domain of a Mobility Anchor Gateway (MAG), the MAG will The original MAG of the PMIP terminal performs context interaction to implement handover of the terminal from the original MAG to the new MAG, and sends a route advertisement message to the PMIP terminal, and the route advertisement message includes information of the active router address, and the PMIP terminal will The router list is constructed based on the receipt of the route advertisement message, and one of the routers is selected as the default router. If the default router cannot be accessed, the terminal selects another router as the new default router in the router list according to the predetermined selection rules.
  • MAG Mobility Anchor Gateway
  • the terminal After receiving the route advertisement message, the terminal determines whether the router is the same as the default router according to the source address of the route advertisement message. If the terminal is the same, the terminal continues to provide the service. If not, it determines whether the source address of the MAG router exists. In the router list, if it does not exist, it is filled in the router list. However, the default router is not modified at this time. When the handover is completed, since the default router is not changed to find the MAG of the PMIP terminal, the PMIP terminal is in an inoperable state. At this time, the subsequent router selection process must be completed, that is, the original judgment is first performed. The default gateway is inaccessible, then Then select the router that can access the success as the default router in the router list, and then continue to work. This process severely affects the handover performance of the terminal, prolongs the handover time, and may cause service interruption. Summary of the invention
  • the purpose of the embodiments of the present invention is to provide a smooth handover method and system for a proxy mobile ip terminal, which can improve handover performance of switching PMIP terminals in a PMIP network, reduce handover time, and ensure service continuity.
  • an embodiment of the present invention provides a smooth handover method for a proxy mobile IP terminal, including the following steps:
  • the access router When the access router detects that the terminal enters the local domain, it determines whether the terminal is a terminal supporting the proxy mobile IP function according to the obtained network pre-configuration information or terminal related information;
  • the access router When it is determined that the terminal is a terminal supporting the proxy mobile IP function, the access router sends a message to the terminal using the source address corresponding to the default router address used by the terminal to complete the smooth handover.
  • an embodiment of the present invention provides a smooth switching method for a proxy mobile IP terminal, including the following steps:
  • the access router When the access router detects that the terminal enters the local domain, it determines whether the terminal is a terminal supporting the proxy mobile IP function according to the obtained network pre-configuration information or terminal related information;
  • the access router When it is determined that the terminal is a terminal supporting the proxy mobile IP function, the access router sends a message to the terminal, where the message includes a flag for indicating that the default router is forcibly modified;
  • the terminal After receiving the message, the terminal determines whether the flag exists in the message, and when determining that the flag exists in the message, filling the global address obtained from the message into the router list, and setting the The global address is the default router address.
  • an embodiment of the present invention provides a smooth handover system for a proxy mobile IP terminal, including: The detecting and determining module is configured to: when detecting that the terminal enters the local domain, determine, according to the obtained network pre-configuration information or the terminal-related information, whether the terminal is a terminal that supports the proxy mobile IP function;
  • the first message sending module is connected to the detecting and determining module, and configured to: when the detecting and determining module determines that the terminal is a terminal that supports the proxy mobile IP function, use an address corresponding to a default router address used by the terminal The terminal sends a message.
  • the embodiment of the present invention provides another smooth switching system for a proxy mobile IP terminal, including:
  • the detecting and determining module is configured to: when detecting that the terminal enters the local domain, determine, according to the acquired network pre-configuration information or terminal related information, whether the terminal is a terminal that supports the proxy mobile IP function; the second message sending module, and the detecting The determining module is connected to send a message to the terminal when the detecting and determining module determines that the terminal is a terminal supporting the proxy mobile IP function, and the message includes a flag for indicating that the default router is forcibly modified.
  • an embodiment of the present invention provides a proxy mobile IP terminal, including: a message receiving module, configured to receive a message including a mandatory modification of a default router identifier; a flag determining module, connected to the message receiving module , determining whether a flag indicating that the default router is forcibly modified is present in the message;
  • a list update module configured to be connected to the flag determining module, configured to: when determining that the flag exists in the message, filling a global address obtained from the message into a router list;
  • the setting module is connected to the flag determining module, and configured to set the global address as a default router address when determining that the flag exists in the message.
  • the embodiment of the present invention uses the default message when sending a route advertisement message to the PMIP terminal entering the network, or a dynamic host message.
  • the corresponding source address of the router address When the terminal receives the message, it will get the corresponding address according to the source address, and compare this address with the default router address. Since the address is the same as the default router address, the terminal will consider that the access router has not changed. Therefore, the subsequent router selection process will not be performed, thus shielding the terminal from performing the router selection operation. It not only reduces the switching time, but also improves the switching performance. It also reduces the switching time and ensures the continuity of the service.
  • Another embodiment of the present invention adds a mandatory flag to a route advertisement message or a DHCP message sent to a PMIP terminal that accesses the network, forcibly modifying a default router in the terminal, so that the terminal can communicate according to the new default router after the handover.
  • the terminal does not need to perform the subsequent router selection process, which not only reduces the switching time, but also improves the switching performance, and also reduces the switching time and ensures the continuity of the service.
  • FIG. 1 is a schematic flow chart of a first embodiment of a method for smoothly switching a proxy mobile IP terminal according to the present invention
  • FIG. 2 is a schematic flow chart of a second embodiment of a method for smooth handover of a proxy mobile IP terminal according to the present invention
  • FIG. 3 is a schematic flow chart of a third embodiment of a method for smooth handover of a proxy mobile IP terminal according to the present invention.
  • FIG. 4 is a schematic flow chart of a fourth embodiment of a method for smooth handover of a proxy mobile IP terminal according to the present invention.
  • FIG. 5 is a schematic structural diagram of a first embodiment of a smooth handover system of a proxy mobile IP terminal according to the present invention
  • FIG. 6 is a schematic structural diagram of a second embodiment of a smooth switching system of a proxy mobile IP terminal according to the present invention.
  • FIG. ⁇ is a schematic structural diagram of an embodiment of a proxy mobile IP terminal according to the present invention. detailed description
  • FIG. 1 is a schematic flowchart diagram of a first embodiment of a method for smooth handover of a proxy mobile IP terminal according to the present invention.
  • the process of this embodiment includes: Step 101: If a terminal enters a local domain of an access router or is powered on in a local domain of an access router, the access router detects that the terminal enters the local domain; Step 102, the connection The ingress router determines whether the terminal is a terminal that supports the PMIP function, that is, the PMIP terminal, according to the obtained network pre-configuration information or the terminal-related information.
  • step 103 is performed, and for the terminal that does not support the PMIP function, Since the present embodiment focuses on the operation of the PMIP terminal to implement smooth handover, the handover method of the terminal other than the PMIP terminal is not described in detail herein, and the handover methods can use the prior art;
  • Step 103 The access router sends a route advertisement message or a DHCP message to the terminal by using a source address corresponding to the default router address of the terminal, so as to complete the smooth handover.
  • the access router in step 103 sends a route advertisement message to the terminal by using a source address corresponding to the default router address of the terminal, and the message may be a DHCP message, and the PMIP terminal receives the route advertisement.
  • the terminal considers that the access router has not changed, and therefore operates according to the normal service flow, but in fact its access router has changed to the terminal.
  • the new access router corresponding to the area because for the PMIP terminal, regardless of the default router address, the data sent by it can be intercepted and processed by the new router, and the handover operation has actually been completed by the network side.
  • the terminal does not feel the network switching, it is not necessary to perform the operation of selecting a new default router, which not only reduces the switching time, but also improves the switching performance of the terminal, and overcomes the problem that the switching time may be too long in the prior art. Interrupted defects.
  • the access router needs to obtain a default route for constructing and using the terminal.
  • the operation of the same address such as the global address and/or link of the original default router associated with the terminal, is sent to the new access router.
  • the acquisition mode is not limited to these two methods.
  • the access router when the access router obtains an operation for constructing the same address as the default router used by the terminal, the access router may forward the corresponding command from the original default router of the terminal by using the authentication and authorization charging entity.
  • the global address and/or link address of the default router may be used to forward the corresponding command from the original default router of the terminal by using the authentication and authorization charging entity.
  • the so-called global unification means that the source address is set to a fixed address in the entire network. Since the data sent by the terminal is intercepted by the access router in the area where the terminal is located, it is not very important for the terminal to use the address as the source address. , and setting it to a uniform address will be very convenient.
  • Local unity means that the source address is set to a fixed address on a certain network segment or a certain area. This scheme is applicable to both the P2P link mode and the shared link mode. Especially for the shared link mode, even if different models or different specifications of PMIP terminals are used, the global unified address or the local unified address is still applicable.
  • the source address of the route advertisement message when the initial network access is used is used as the source address of the message sent by the new access router to the terminal, or the address of the HA of the terminal or the link address of the terminal is used as the source of the message sent by the new router to the terminal.
  • the address is applicable to the P2P link mode.
  • step 103 of the previous embodiment may be specifically:
  • Step 103a The access router receives a routing request message sent by the terminal.
  • Step 103b The access router broadcasts a route advertisement message to the terminal by using the same source address as the default router address of the terminal.
  • step 103 of the previous embodiment may also use step 103c in FIG. 3, that is, the access router broadcasts a route advertisement message or a DHCP message to a terminal in the network layer, the route advertisement message or DHCP.
  • the message also uses the source address corresponding to the terminal's default router address.
  • the access router uses the interface ID in the default router address used by the terminal to form a link-local address as a source address to broadcast a route advertisement message or DHCP to the terminal. Interest.
  • the access router broadcasts a route advertisement message or a DHCP message to the terminal using the default router address used by the terminal as the source address.
  • the access router may also send a route advertisement message or a DHCP message to the terminal by using the link layer address used by the terminal as the source address.
  • FIG. 4 it is a schematic flowchart of the fourth embodiment of the method for the smooth handover of the proxy mobile IP terminal according to the present invention. Includes the following steps:
  • Step 201 The access router detects that the terminal enters the local domain.
  • Step 202 The access router determines, according to the obtained network pre-configuration information or terminal related information, whether the terminal is a terminal that supports the proxy mobile IP function.
  • Step 203 If the access router determines that the terminal is a terminal that supports the proxy mobile IP function, sending a message to the terminal, where the message includes a flag for indicating that the default router is forcibly modified; Step 204, the terminal receives the message. After determining whether the flag exists in the message, if the flag exists, step 205 is performed; otherwise, the normal switching process is performed, and the operation ends;
  • Step 205 The terminal fills in the router list from the global address obtained by the message, and sets the global address as the default router address.
  • the global address can be directly configured according to the source address and prefix of the message, or the global address or link address corresponding to the default router can be directly carried in the message.
  • the message here can be a route advertisement message, which can be directly extracted.
  • the router list is populated with a global address corresponding to the default router or a global address generated by the link address.
  • the operation of the access router to send a message to the terminal may be that the access router first receives a route request message initiated by the terminal, and then sends a route advertisement message to the terminal, or directly broadcasts a route advertisement message to the terminal by the access router.
  • the access router may also include a flag indicating that the default router is forcibly modified and a corresponding default router address in the DHCP response message sent to the terminal after the terminal initiates the DHCP request.
  • the default router cannot be applied because it is not modified.
  • a flag is added to the route advertisement message to force the modification of the default router, so that the terminal checks that the access router changes. The modification of the default router is completed, and the process of router selection is not required, thereby reducing the switching time and avoiding the service interruption problem that may be caused by the handover delay.
  • the terminal can send information to the access router whether the terminal supports the feature of forcibly modifying the default router when the network accesses or receives the route advertisement message, and the information can be carried in the routing request.
  • the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.
  • the present invention further provides an embodiment of a smooth handover system for a proxy mobile IP terminal, as shown in FIG. 5, which is a first embodiment of a smooth handover system for a proxy mobile IP terminal according to the present invention.
  • the structure of the present embodiment includes the following modules: a detection determination module 1, and a first message transmission module 2.
  • the detection and determination module 1 is configured to detect, according to the acquired network pre-configuration information or the terminal-related information, whether the terminal is a terminal that supports the proxy mobile IP function, and the first message sending module 2 and the detection and determination module. 1 is connected, and is used to send a message to the terminal by using the source address corresponding to the default router address of the terminal when the detecting and determining module 1 determines that the terminal is a terminal supporting the proxy mobile IP function.
  • the source address corresponding to the default router address is used, and the terminal determines the source address when receiving the message. Because the address corresponds, the terminal considers that the access router does not occur. Change, so the subsequent router selection process will not be performed, thus shielding the terminal from performing the router selection operation, which reduces the switching time, correspondingly improves the switching performance, and also reduces the switching time and ensures the continuity of the service. Sex.
  • the second embodiment of the smooth handover system of the proxy mobile IP terminal of the present invention is Schematic diagram of the structure, the embodiment includes the following modules: a detection judging module 1 and a second message sending module 4.
  • the detecting and determining module 1 is configured to detect, according to the acquired network pre-configuration information or the terminal related information, whether the terminal is a terminal supporting the proxy mobile IP function, and the second message sending module 4 and the detecting and determining
  • the module 1 is connected to send a message to the terminal when the detection and determination module 1 determines that the terminal is a terminal supporting the proxy mobile IP function, and the message includes a flag for indicating that the default router is forcibly modified.
  • the information advertised here may also be a link-local address, and the terminal uses the address and the prefix information in the corresponding message to construct the address of the default router to be used and set it.
  • a schematic structural diagram of an embodiment of a proxy mobile IP terminal according to the present invention includes: a message receiving module 5; And the message determining module 6 is connected to the message receiving module 5, and is configured to determine whether a flag indicating that the default router is forcibly modified is determined in the message; the list updating module is configured to receive a message for indicating that the default router identifier is forcibly modified. 7 .
  • the method is connected to the flag judging module 6 and configured to: when determining that the flag exists in the message, fill the router address list with the global address obtained by the message; and the setting module 8 is connected to the flag judging module 6 for When it is determined that the flag exists in the message, the global address is set as a default router address.
  • the access router adds a mandatory flag to the message sent to the PMIP terminal that enters the network, so that the terminal forcibly modifies the default router address as the address of the access router, so that when the terminal is switched, it can communicate according to the new default router.
  • the terminal does not need to perform the subsequent router selection process, which not only reduces the switching time, but also improves the switching performance, and also reduces the switching time and ensures the continuity of the service.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

La présente invention concerne un procédé et système de transfert sans coupure pour terminal IP mobile de serveur mandataire comprenant : en cas de détermination par un routeur d'accès qu'il s'agit d'un terminal PMIP, le routeur d'accès transmet un message au terminal au moyen d'une adresse source qui correspond à l'adresse de routeur par défaut du terminal. L'invention concerne un autre procédé de transfert sans coupure, comprenant : dans le cas où le routeur détermine qu'il s'agit d'un terminal PMIP, le routeur d'accès transmet un message pour notifier le terminal, le message comprenant un marqueur qui indique un changement obligatoire du routeur par défaut ; si le terminal détermine que le marqueur existe, le terminal ajoute l'adresse correspondante obtenue à partir du message au table de routeur et l'établit comme l'adresse de routeur par défaut. L'invention concerne également deux autres types du transfert sans coupure pour le terminal IP mobile de serveur mandataire et un terminal IP mobile de serveur mandataire. L'invention permet l'amélioration de la réalisation de transfert de terminal PMIP dans le réseau PMIP, la réduction du temps de transfert, et la garantie de la continuité de service.
PCT/CN2008/071489 2007-06-29 2008-06-30 Procédé et système de transfert sans coupure pour terminal ip mobile de serveur mandataire WO2009003406A1 (fr)

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Application Number Priority Date Filing Date Title
CNA2007101295382A CN101335989A (zh) 2007-06-29 2007-06-29 代理移动ip终端的平滑切换方法及系统
CN200710129538.2 2007-06-29

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WO2009003406A1 true WO2009003406A1 (fr) 2009-01-08

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CN101730148B (zh) * 2009-06-19 2012-10-10 中兴通讯股份有限公司 一种代理移动ip协议中流控制的方法及系统
CN102378150B (zh) * 2010-08-25 2015-01-21 华为技术有限公司 数据传输的方法和代理实体
CN103856397B (zh) * 2012-12-07 2018-08-14 中兴通讯股份有限公司 多链路透明互连网络中组播转发方法及装置、路由桥
CN103889002B (zh) * 2012-12-20 2019-05-21 中兴通讯股份有限公司 流控方法及装置、移动节点、接入网关

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