WO2011069383A1 - Procédé permettant de mettre en œuvre une mobilité d'utilisateur - Google Patents

Procédé permettant de mettre en œuvre une mobilité d'utilisateur Download PDF

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Publication number
WO2011069383A1
WO2011069383A1 PCT/CN2010/077115 CN2010077115W WO2011069383A1 WO 2011069383 A1 WO2011069383 A1 WO 2011069383A1 CN 2010077115 W CN2010077115 W CN 2010077115W WO 2011069383 A1 WO2011069383 A1 WO 2011069383A1
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WO
WIPO (PCT)
Prior art keywords
address
tunnel router
mobile node
eid
rloc
Prior art date
Application number
PCT/CN2010/077115
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English (en)
Chinese (zh)
Inventor
胡方伟
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中兴通讯股份有限公司
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 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2011069383A1 publication Critical patent/WO2011069383A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/09—Mapping addresses
    • H04L61/10—Mapping addresses of different types
    • H04L61/103—Mapping addresses of different types across network layers, e.g. resolution of network layer into physical layer addresses or address resolution protocol [ARP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2212/00—Encapsulation of packets

Definitions

  • the present invention relates to the field of communications, and in particular to a method for implementing user mobility.
  • BACKGROUND OF THE INVENTION With the development of networks, there is an increasing demand for user mobility.
  • the design of the Internet is considered in the fixed (wired) mode of access environment, and does not take into account the large amount of mobile users. Therefore, how to solve the problem of user mobility in the Internet is a hot topic of current research.
  • Mobility schemes include protocols such as ⁇ 4, ⁇ , ⁇ 6, and most of these protocols are inadequate.
  • MIPv4 and MIPv6 are host-based solutions that require certain changes to the host and can only be used for IPv4 networks and IPv6 networks, respectively.
  • MIPv4 There is also a serious triangular routing problem with MIPv6.
  • PMIPv6 protocol the implementation of this protocol is more complicated and can only be used for networks with IPv6 addresses.
  • the solution to the problem of solving user mobility problems in related technologies has not been proposed yet.
  • the content of the invention is relevant
  • the present invention has been made in view of a relatively complicated solution to the problem of user mobility in operation. Therefore, the main object of the present invention is to provide a method for implementing user mobility to solve at least one of the above problems. According to an aspect of the present invention, a method for implementing user mobility is provided.
  • the method for implementing user mobility includes: assigning an address to a mobile node, and establishing a TCP connection of the mobile node by the address, the address Only the identity attribute of the mobile node is identified, and the identity attribute is represented by an EID address; the network node encapsulates the IP packet of the mobile node, and the address in the encapsulated IP packet has only the location attribute, and the location attribute is represented by the RLOC address.
  • the EID address is the only one in the world.
  • the network node encapsulates the mobile node's IP packet, including: the border tunnel router receives the IP address; the border tunnel router locally searches for the RLOC address corresponding to the EID address of the IP address; The tunnel router encapsulates the RLOC address for the IP address; the border tunnel router sends the encapsulated IP address. Further, in a case that the border tunnel router cannot find the RLOC address corresponding to the EID address locally, the method further includes: the border tunnel router sends a query message to the mapping system, where the mapping system is configured to store the EID address and the RLOC The mapping relationship of the address; the mapping system returns a response message to the border tunnel router, where the response message carries the RLOC address.
  • the mapping system is composed of a distributed mapping table server.
  • the border tunnel router includes: an ingress tunnel router and an egress tunnel router, where the ingress tunnel router searches for a mapping relationship between the EID address and the RLOC address; and the egress tunnel router registers and updates the mapping relationship between the EID address and the RLOC address.
  • the method further includes: the border tunnel router of the network where the mobile node is located sends a registration message to the mapping system, where The registration message is used to indicate that the location of the mobile node has changed; the mapping system adds an RLOC address entry to the mapping table of the EID address, and increases the mapping priority of the RLOC address.
  • the address assigned to the mobile node only identifies the identity attribute of the mobile node, wherein the identity attribute is represented by an terminal identifier (EID) address; the address of the IP 4 message only has a location attribute, a location attribute It is represented by a routing location (RLOC) address, which solves the complicated problem of solving the problem of user mobility in the related art, thereby achieving the effect of easily implementing user mobility.
  • EID terminal identifier
  • RLOC routing location
  • FIG. 1 is a schematic diagram of a mapping system for user mobility according to an embodiment of the present invention
  • 2 is a flow chart showing a method for implementing user mobility according to an embodiment of the present invention
  • FIG. 3 is a flowchart of a mapping update mechanism according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of actively initiating communication according to an embodiment of the present invention.
  • FIG. 5 is a flow chart of data forwarding when a passively received user's location changes in accordance with an embodiment of the present invention.
  • FIG. 1 is a schematic diagram of a user mobility mapping system according to an embodiment of the present invention. As shown in FIG. 1, a user mobility mapping system is implemented based on an identity identification and a location separation technology, and a mobile node accesses a network through a border tunnel router, and an exit tunnel.
  • the border router ( ETR ) registers the user's information to the mapping system.
  • the mapping system consists of a Distribute Hast Table (DHT) mapping server.
  • DHT Distribute Hast Table
  • the method for implementing user mobility is identified by an attribute, where an address is assigned to a mobile node (ie, a mobile user), and a TCP connection of the mobile node is established through the address, and the address is only identified.
  • the identity attribute of the mobile node is represented by an terminal identifier (EID) address; the network node (which may include a border tunnel router, a mapping system) configures and transmits the IP packet of the mobile node, and the configured IP packet
  • EID terminal identifier
  • the network node which may include a border tunnel router, a mapping system
  • RLOC Route Location
  • the location attribute and the identity attribute of the mobile node are separately represented, and are respectively represented by different identifiers or addresses, thereby solving the problem that the solution for solving the user mobility problem in the related art is complicated, and thus can be simplified. Realize the mobility of users.
  • the value of the EID address of the mobile node does not change.
  • border tunnel router including an ingress tunnel router and an egress tunnel router
  • FIG. 3 is a flowchart of a mapping update mechanism according to an embodiment of the present invention.
  • Step S301 In an initial state, a mobile node (MN) registers with the mapping system through ETR1, and when ETR1 detects that the mobile node is attached, it finds There is a new EID identifier, a mechanism for registering with the mapping system, and a map-register (Map-Register) message.
  • the content of the file contains the EID identifier and the RLOC 1 address of ETR1.
  • the priority of the mapping relationship between the two is priority.
  • Step S302 After receiving the mapping registration message, the DHT mapping server in the mapping system stores the mapping relationship between the EID and the RLOC1 to the specific DHT mapping service according to the DHT algorithm. , and start the timer.
  • Step S303 when the location of the mobile node changes, the mobile node accesses the network through the new border tunnel router ETR2, and needs to perform EID again. Registration. ETR2 will initiate a new registration mechanism to the mapping system, encapsulating Map-Register (ie, mapping registration) messages. Because the location of the mobile node changes, its EID value does not change. Therefore, the message content contains the EID identifier and the new RLOC address RLOC2 of ETR2, and the mapping relationship between the two is priority2.
  • Map-Register ie, mapping registration
  • the priority of the mapping between the EID identifier and the RLOC2 is temporarily increased in the Map-Register 4 message and at least one timer is invalid.
  • the priority of the increased time must be higher than the priority priority1 of the mapping relationship before the change of the mobile node; in step S304, after the mapping system receives the registration message, the mapping table of the EID is added with a new entry of the RLOC2, and Since the mapping priority of RLOC2 is temporarily raised, it is ensured that RLOC2 is preferred, and the mapping relationship is updated and switched after the location change of the mobile node is completed.
  • FIG. 4 is a flowchart of data forwarding when the location of the user actively initiating communication changes according to an embodiment of the present invention, and the method includes the following steps: Step 4 In the S401, the host A (hostA) initiates communication with the host B (hostB), and the host A encapsulates and sends the IP address, and the source IP address and the destination IP address of the host A are the EID address EIDa and the host B of the host A respectively.
  • Step S402 after the message arrives at the ingress tunnel router (ITR1) of the host A (ie, the mobile user or the mobile node), the ITR1 locally searches for the RLOCb corresponding to the EIDb of the host B, and directly finds the mapping relationship.
  • the encapsulated packet is encapsulated with an IP packet outside the original IP packet.
  • the source IP address and the destination IP address are the RLOC1 address of ITR1 and the RLOCb address of the ETR.
  • the query operation is initiated to the mapping system; in step S403, the mapping system replies to the Map-Reply after receiving the query (Map-Request)
  • the Map-Reply 4 message carries the RLOCb address
  • the ITR receives the Map-Reply 4 message and encapsulates the message;
  • Step S404 forwards the encapsulated message to the ETR;
  • Step S405 the forwarded encapsulated message is in the ETR Decapsulating the original message, and then sending the original message to the host B to complete the communication;
  • Step S406 when the location of the host A is changed, the updated host address A1 is obtained, and the updated host A1 sends the message.
  • the message arrives at the new ingress tunnel router (ITR2); in step S407, the new ingress tunnel router ITR2 registers the mapping relationship between the new EID and RLOC2 to the mapping system.
  • the priority of the mapping relationship will be The priority of the mapping relationship between the EID and the RLOC1 is exceeded.
  • the message is forwarded to the ETR device according to the RLOCb in the core network; in step S409, after receiving the encapsulated message, the ETR finds the mapping relationship between the new EID and the RLOC2, saves it in the local cache, and marks it. Then, the encapsulated packet is decapsulated and the decapsulated IP4 file is forwarded to the host B. In step S410, the host B replies with the message to the ETR. Step S411, 4 ⁇ arrives at the ETR, and the identifier is found in the ETR. After the mapping between the EID address and the RLOC address, the process of requesting the mapping system is initiated; Step S412, because the mapping relationship corresponding to the EID in the mapping system includes RLOC1 and
  • Steps S501 to S505 the initial data flow process is the same as the user movement of the active communication, detailed
  • the content is the same as the step S401 to the step S405;
  • the step 4 is gathered S506, after the passive user (ie, the host B) moves, the 4 ⁇ message initiated by the host A cannot be forwarded to the destination host B after reaching the ETR, and the ETR will send a
  • the ICMP message with the destination address being unreachable is sent to the ITR1.
  • Step S507 After receiving the ICMP message with the unreachable destination address, the ITR1 initiates a mapping request to the mapping system to obtain a mapping relationship between the new EID and the RLOC.
  • Step S508 ITR1 After receiving the Map-Reply message, the packet is encapsulated according to the new RLOC2 address; in step S509, the ITR1 forwards the newly encapsulated RLOC address to the new ETR2 device; Step S510, the decapsulated by the ETR2 device The IP packet is forwarded to host B. When the traffic is switched to the new location, the TCP connection will not be interrupted, but a small amount of packet loss will occur.
  • the present invention is applicable to a slow-moving device and does not have a great impact on the service.
  • the present invention proposes a new method for realizing user mobility based on identity identification and location separation technology, which separates the dual attributes of the identity and location of the IP address, and the address assigned by the mobile node only identifies the identity of the mobile node.
  • the attribute, represented by EID, and the address assigned by the network node only identifies the location attribute, represented by RLOC.
  • a border tunnel router (TR) is introduced between the user and the core network, and operations such as registration, searching, and updating of the EID and RLOC mapping relationships are performed on the router. Construct a new mapping system for storing the mapping between EID and RLOC.
  • the EID address identifying the identity attribute of the mobile node must be globally unique, and the value of the EID address is always unchanged when the location of the mobile node changes; and the value of the RLOC address is changed when the location of the mobile node changes.
  • the border tunnel router (TR) is divided into an ingress tunnel router (ITR) and an egress tunnel router (ETR).
  • the router completes the lookup operation of the EID and RLOC mapping relationship, and the egress tunnel router completes the registration and update operations of the EID and RLOC mapping relationship.
  • the mapping system is composed of a DHT mapping server, and the DHT mapping server may be a router running the DHT protocol or a DHT server.
  • the present invention uses the address assigned to the mobile node to identify only the identity attribute of the mobile node, wherein the identity attribute is represented by an terminal identifier (EID) address; IP 4
  • EID terminal identifier
  • IP 4 The address of the transmission text only has the location attribute, and the location attribute is represented by the routing location (RLOC) address, which solves the complicated problem of solving the user mobility problem in the related art, thereby achieving the user mobility easily.
  • EID terminal identifier
  • RLOC routing location
  • 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 scope of the present invention are intended to be included within the scope of the present invention.

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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 se rapporte à un procédé permettant de mettre en œuvre une mobilité d'utilisateur. Dans le procédé, une adresse est attribuée à un nœud mobile et une connexion TCP (protocole de contrôle de transmissions) du nœud mobile est établie selon l'adresse; l'adresse identifie seulement l'attribut d'identité de nœud mobile qui est représenté par une adresse d'identité d'hôte d'extrémité (EID); un nœud de réseau encapsule un message IP du nœud mobile; l'adresse du message IP encapsulé a seulement un attribut de localisation qui est représenté par une adresse de localisateur de routage (RLOC). Le procédé comprend les étapes suivantes : un routeur de tunnel de frontière reçoit le message IP; le routeur de tunnel de frontière trouve localement l'adresse de localisateur RLOC correspondant à l'adresse d'identité EID du message IP; le routeur de tunnel de frontière encapsule le message IP avec l'adresse de localisateur RLOC; le routeur de tunnel de frontière envoie le message IP après l'encapsulation. Selon la présente invention, la mobilité d'utilisateur peut être mise en œuvre de façon simple.
PCT/CN2010/077115 2009-12-08 2010-09-19 Procédé permettant de mettre en œuvre une mobilité d'utilisateur WO2011069383A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200910211965.4A CN102088390B (zh) 2009-12-08 2009-12-08 用户移动性的实现方法
CN200910211965.4 2009-12-08

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CN102868612A (zh) * 2011-07-04 2013-01-09 中兴通讯股份有限公司 基于lisp的移动性实现方法及隧道路由器
CN102957605B (zh) * 2011-08-24 2017-04-12 中兴通讯股份有限公司 一种切换实现方法、系统和源出口隧道路由器
CN103037360B (zh) * 2011-09-28 2017-03-29 中兴通讯股份有限公司 基于lisp的映射请求响应、信息获取方法及相应设备
CN103096299B (zh) 2011-11-01 2017-09-15 中兴通讯股份有限公司 一种移动节点动态获取位置标识的方法及lisp网络
CN103167463B (zh) * 2011-12-09 2017-10-27 中兴通讯股份有限公司 更新报文的处理方法及系统、映射服务器和移动节点
CN103841022B (zh) * 2014-03-12 2017-04-05 华为技术有限公司 用于建立隧道的方法及装置
CN105592447A (zh) * 2014-10-22 2016-05-18 中兴通讯股份有限公司 一种分配移动终端的身份标识的方法和装置
CN104836849B (zh) * 2015-04-16 2018-02-09 新华三技术有限公司 一种注册虚拟机方法和装置
CN104767759B (zh) * 2015-04-22 2019-01-18 新华三技术有限公司 一种边缘设备注册方法和装置
CN106953799A (zh) * 2016-01-06 2017-07-14 中国移动通信集团海南有限公司 一种移动终端的通信方法及装置
CN106130914B (zh) * 2016-06-22 2021-05-25 新华三技术有限公司 主机迁移方法及装置

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