WO2013023465A1 - 身份位置分离与传统网络互联互通方法、ilr和asr - Google Patents

身份位置分离与传统网络互联互通方法、ilr和asr Download PDF

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Publication number
WO2013023465A1
WO2013023465A1 PCT/CN2012/075303 CN2012075303W WO2013023465A1 WO 2013023465 A1 WO2013023465 A1 WO 2013023465A1 CN 2012075303 W CN2012075303 W CN 2012075303W WO 2013023465 A1 WO2013023465 A1 WO 2013023465A1
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isr
routing
ilr
mapping
location
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PCT/CN2012/075303
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English (en)
French (fr)
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孙默
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中兴通讯股份有限公司
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Publication of WO2013023465A1 publication Critical patent/WO2013023465A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00Network arrangements, protocols or services for addressing or naming
    • H04L61/09Mapping addresses
    • H04L61/10Mapping addresses of different types
    • H04L61/106Mapping addresses of different types across networks, e.g. mapping telephone numbers to data network addresses
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W8/00Network data management
    • H04W8/26Network addressing or numbering for mobility support

Definitions

  • ILR Identity location separation and traditional network interconnection method
  • the present invention relates to the field of communications technologies, and in particular, to a method for interconnecting an identity and location separation network with a legacy network, an Access Service Router (ASR), and an Identifier Locator Register (ILR).
  • ASR Access Service Router
  • ILR Identifier Locator Register
  • the IP address in the TCP/IP (Transmission Control Protocol/Internet Protocol) protocol widely used by the Internet has a dual function, and serves as the location of the network terminal's communication terminal host network interface in the network topology.
  • the identity which is also the identity of the transport layer host network interface.
  • the TCP/IP protocol was not designed with host mobility in mind. However, as host mobility becomes more prevalent, the semantic overload defects of such IP addresses are becoming increasingly apparent.
  • the IP address of the host changes, not only the route changes, but also the identity of the communication terminal host changes. This will cause the routing load to become heavier and heavy, and the change of the host identity will also cause the application and connection to be interrupted.
  • the purpose of identification and location separation is to solve the problem of semantic overload and severe routing load of IP addresses, and to separate the dual functions of IP addresses to achieve dynamic redistribution of mobility, multiple townships, IP addresses, and mitigation of routes. Support for issues such as load and mutual visits between different network areas in the next generation Internet.
  • the network router based implementation method is one of the solutions for identity identification and location separation.
  • a network-based identity identification and location separation scheme is proposed.
  • the scheme is simply referred to as an identity and location separation network.
  • the basic idea of the scheme is: dividing the network into an access layer and a core layer, in the network.
  • the mobile node has two types of identifiers: an Access Identifier (AID) and a Routing-Location Identifier (RID). Configure a unique AID for each user in the network.
  • the AID remains unchanged during the mobile process.
  • the AID can only be used at the access layer.
  • the RID can only be used at the core layer.
  • the application layer communicates between the terminals, the AID is used to identify the peer.
  • FIG. 1 The topology diagram of the above network-based identity identification and location separation framework is shown in FIG. 1 , which mainly includes: an access service router (ASR), an Identifier Locator Register (ILR), and an interworking service. Interworking Service Router (ISR), etc. among them:
  • ASR access service router
  • ISR Interworking Service Router
  • ASR is responsible for providing access services for various mobile nodes, assigning RIDs to access users, and
  • the ASR When receiving the data packet sent by the terminal, the ASR queries the AID-RID mapping table in the local cache (CACHE) according to the destination address (ie, the AID of the communication peer) in the data packet, if the corresponding AID-RID mapping is found.
  • the entry, the RID of the communication terminal that is found is encapsulated in the data packet header, and the data packet is sent to the backbone network for forwarding processing; if the corresponding AID-RID mapping entry is not found, the data packet is forwarded to The backbone network sends the AID-RID mapping information to the ILR, and saves the corresponding AID-RID mapping of the ILR to the local device for later packet forwarding.
  • the ASR may choose not to forward the data packet to the backbone network, but initiate the process of querying the AID-RID mapping information (communicating the peer end) to the ILR, waiting for the ILR. After returning the corresponding AID-RID mapping, the RID of the communication terminal that is found is encapsulated in the header and sent to the backbone network for forwarding processing.
  • the ASR decapsulates the data packet, and strips the newly added RID packet header from the data packet to the terminal.
  • the ILR is mainly responsible for maintaining the mapping relationship between the user identity and the location identifier in the network, and providing query services to the access gateway router and other mapping servers.
  • a terminal that accesses a legacy network by a terminal of an identity and location separation network needs to exchange visits through an ISR.
  • the ISR acts as an interworking gateway router between the identity and location separation network and the traditional network, and issues the routing information of the identity and location separation network AID to the traditional network.
  • the traditional network terminal access identity and the location separation network are accessed through the ISR, and the ISR is based on the destination address.
  • (AID) Query the AID-RID mapping relationship and perform outer RID encapsulation.
  • the identity and location separation of the packets in the network to access the traditional network through the ISR is performed.
  • the specific process is that the ASR receives the packet from the terminal and determines whether the destination address is separated from the location and the network AID range. If the identity is not separated from the location.
  • the network AID range is encapsulated by the ISR RID and sent to the ISR.
  • the ISR removes the outer RID encapsulation of the packet and sends it to the traditional network.
  • the identity and location separation network when the actual networking is deployed, the identity and location separation network usually communicates with multiple traditional networks. As shown in Figure 2, that is, the identity and location separation network will have multiple ISRs. Therefore, the ASR receives the terminal. The sent message determines that the destination address is not within the identity and location separation network AID range. It is not possible to further determine which ISR should be sent according to the configuration.
  • the technical problem to be solved by the embodiments of the present invention is to provide an interworking method for the identity and location separation network and the traditional network interconnection, the ILR and the ASR, to solve the interconnection and interworking between the identity and location separation network and the traditional network.
  • an embodiment of the present invention provides a method for interconnecting an identity and location separation network and a traditional network, including:
  • the Identity Location Register establishes a mapping entry that includes the routing location identifier of the Interworking Service Router (ISR) and legacy network routing information.
  • the above method may also have the following feature: the traditional network routing information is sent by the ISR to the ILR.
  • the above method may also have the following feature: the routing location identifier of the ISR is sent by the ISR to the ILR.
  • the foregoing method may further have the following features.
  • the method further includes: when the ILR receives the same traditional network routing information sent by multiple ISRs, establishing a mapping entry for the routing location identifier of each ISR and the traditional network routing information. And the mapping entry containing the same traditional network routing information is an equivalent mapping entry.
  • each of the equivalence map entries further includes priority information.
  • the above method may also have the following feature, the priority information in the equivalence map entry is according to the The hop count of the ISR reaching the traditional network routing information and/or the load sharing decision of the ISR.
  • the above method may also have the following features, the method further comprising:
  • the access service router When receiving the data packet sent by the terminal to the traditional network, the access service router (ASR) obtains a routing location identifier corresponding to the destination address of the data packet from the local or the ILR, and uses the routing location identifier to encapsulate the location. The data packet is sent to the ISR indicated by the routing location identifier.
  • the method may also have the following feature: the obtaining, by the local or the ILR, the routing location identifier corresponding to the destination address of the data packet includes:
  • the ASR finds the corresponding mapping entry locally according to the destination address of the data packet, the ASR obtains the corresponding routing location identifier from the local mapping entry; if the local query is not found, the ILR is received.
  • the returned mapping entry obtains the routing location identifier corresponding to the destination address of the data packet from the mapping entry returned by the ILR.
  • a further embodiment of the present invention provides an identity location register, the identity location register (ILR) includes a mapping relationship establishing module, and the mapping relationship establishing module is configured to establish a mapping entry including a routing location identifier of the ISR and legacy network routing information.
  • ILR identity location register
  • the mapping relationship establishing module is configured to establish a mapping entry including a routing location identifier of the ISR and legacy network routing information.
  • the above-mentioned identity location register may also have the following features.
  • the ILR further includes a routing information receiving module, configured to receive the traditional network routing information sent by the ISR.
  • the above-mentioned identity location register may also have the following features.
  • the routing information receiving module is further configured to: receive the ISR to send its routing location identifier.
  • the above-mentioned identity location register may also have the following features:
  • the mapping relationship establishing module is further configured to: when the routing information receiving module receives the same traditional network routing information sent by multiple ISRs, the routing location identifier for each ISR A mapping entry is established with the traditional network routing information, and the mapping entry containing the same traditional network routing information is an equivalent mapping entry.
  • the above-mentioned identity location register may also have the following features, and the mapping relationship establishing module is further configured to: when establishing the equivalent mapping entry, include priority information in each of the equivalent mapping entries.
  • the identity location register may further have the following feature: the mapping relationship establishing module is configured to determine a priority of the equivalent mapping entry according to a hop count of the ISR reaching the traditional network routing information and/or a load sharing of the ISR. information.
  • An embodiment of the present invention further provides an access service router, where the access service router (ASR) includes a routing location information acquiring unit and a packet sending unit, where:
  • the routing location information obtaining unit is configured to: receive a datagram sent by the terminal to the traditional network, and the packet sending unit is configured to: encapsulate the data packet by using the routing location identifier, and send the routing location identifier indication ISR.
  • the foregoing access service router may also have the following features, the routing location information acquiring unit includes a first query unit and a second query unit, where:
  • the first query unit is configured to: obtain a corresponding routing location identifier from the local mapping entry when the corresponding mapping entry is found locally according to the destination address of the data packet; a mapping entry, then notifying the second query unit;
  • the second query unit is configured to: when receiving the notification, send a query request to the ILR according to a destination address of the data packet, and receive a mapping entry returned by the ILR, from the embodiment of the present invention
  • FIG. 1 is a schematic diagram of a network topology of a network-based identity and location separation architecture of the related art
  • FIG. 2 is a schematic diagram of interworking between a network of a network-based identity and location separation framework of the related art and a plurality of conventional networks;
  • FIG. 3 is a flow chart of interaction between an ISR and an ILR according to an embodiment of the present invention.
  • FIG. 4 is a flowchart of a process for sending a packet to a legacy network by an identity and location separation network terminal according to an embodiment of the present invention
  • FIG. 5 is a block diagram of an ILR according to an embodiment of the present invention
  • FIG. 6 is a block diagram of an ASR according to an embodiment of the present invention. Preferred embodiment of the invention
  • the embodiment of the invention provides a method for interworking between an identity and location separation network and a traditional network, including:
  • the Identity Location Register establishes a mapping entry that includes the routing location identifier of the Interworking Service Router (ISR) and legacy network routing information.
  • the traditional network routing information is sent by the ISR to the ILR.
  • the routing location identifier of the ISR is sent by the ISR to the ILR.
  • the method further includes: when the ILR receives the same traditional network routing information sent by multiple ISRs, establishing a mapping entry for the routing location identifier of each ISR and the traditional network routing information, and including the same traditional network.
  • the mapping entry of the routing information is an equivalent mapping entry.
  • each of the equivalence map entries further includes priority information.
  • the priority information in the equal-cost mapping entry is determined according to the hop count of the ISR reaching the traditional network routing information and/or the load sharing of the ISR.
  • the method further includes:
  • the access service router When receiving the data packet sent by the terminal to the traditional network, the access service router (ASR) obtains a routing location identifier corresponding to the destination address of the data packet from the local or the ILR, and uses the routing location identifier to encapsulate the location. The data packet is sent to the ISR indicated by the routing location identifier.
  • the obtaining, by the local or the ILR, the routing location identifier corresponding to the destination address of the data packet includes:
  • the ASR finds the corresponding mapping entry locally according to the destination address of the data packet, the ASR obtains the corresponding routing location identifier from the local mapping entry; if the local query is not found, the ILR is received.
  • the returned map entry, from the map entry returned by the ILR Obtaining a routing location identifier corresponding to the destination address of the data packet.
  • the process for the ILR to establish a mapping entry includes:
  • Step 301 The ISR and the BR obtain the traditional network routing information through the BGP routing protocol.
  • Step 302 The ISR sends the obtained traditional network routing information to the ILR, and may also send the RID information of the ISR.
  • Step 303 The ILR generates a corresponding mapping entry according to the received traditional network routing information and/or the RID information of the ISR. If the traditional network routing information sent by multiple ISRs is duplicated, an equivalent mapping entry is generated.
  • step 304 the ILR replies to the ISR with a response message.
  • step 302 if the RID information of the ISR is maintained in the ILR, the ISR only needs to send the routing information of the traditional network; if the ILR does not have the RID information of the ISR, the ISR needs to send the routing information of the traditional network and its own RID information.
  • mapping entries generated based on the routing information and the RID is as follows:
  • the priority can be based on the number of hops that the ISR reaches the destination address, or consider the ISR load. Factors such as sharing are determined. Priority 1, 2, ... represents a different level of priority. Of course, priority A, B, C, etc. may also be used, which is not limited by the present invention. Among them, the number of hops is small and/or the burden is light, and the level is low. Of course, priority can also be set based on other priority criteria.
  • the priority map entry may not include priority information.
  • step 304 can be performed before the execution of step 303.
  • Step 401 The UE sends the packet sent to the traditional network to the ASR.
  • Step 402 the ASR searches for the locally cached mapping entry according to the destination address of the packet, and if the corresponding mapping entry is not found, sends a query request to the ILR; if the corresponding mapping entry is found, then the process proceeds directly to step 404;
  • Step 403 The ILR searches for the mapping entry according to the destination address of the packet, and returns the mapping entry to the ASR. In this step, if the destination address finds multiple mapping entries (ie, equivalent mapping entries), the ILR may map the highest priority.
  • the entries are returned to the ASR, and can also be returned to the ASR.
  • the ASR randomly selects one of them, or selects a mapping entry according to the priority, such as selecting the mapping entry with the highest priority.
  • Step 404 The ASR performs outer IP encapsulation on the packet according to the RID information in the mapping entry.
  • the ASR saves the mapping entry for subsequent use.
  • Step 405 The ASR sends the packet to the ISR.
  • Step 406 The ISR removes the outer package of the packet.
  • Step 407 The ISR sends the packet to the traditional network.
  • the embodiment of the present invention provides an identity location register.
  • the ILR includes a mapping relationship establishing module, and the mapping relationship establishing module is configured to establish a mapping entry including a routing location identifier of the ISR and the traditional network routing information.
  • the ILR further includes a routing information receiving module, configured to receive the transmission sent by the ISR System routing information.
  • the routing information receiving module is further configured to: receive the ISR to send its routing location identifier.
  • the mapping relationship establishing module is further configured to: when the routing information receiving module receives the same traditional network routing information sent by multiple ISRs, establish a routing location identifier for each ISR and the traditional network routing information.
  • a mapping entry, and the mapping entry containing the same traditional network routing information is an equivalent mapping entry.
  • the mapping relationship establishing module is further configured to: when the equal-cost mapping entry is established, further include a priority information in each of the equivalent mapping entries.
  • the mapping relationship establishing module is further configured to: determine priority information of the equivalent mapping entry according to the hop count of the ISR reaching the traditional network routing information and/or the load sharing of the ISR.
  • the embodiment of the present invention further provides an access service router.
  • the ASR includes a route location information acquiring unit and a message sending unit, where:
  • the routing location information obtaining unit is configured to: receive a datagram sent by the terminal to the traditional network
  • the packet sending unit is configured to: encapsulate the data packet by using the routing location identifier, and send the data packet to the ISR indicated by the routing location identifier.
  • the routing location information obtaining unit includes a first query unit and a second query unit, where:
  • the first query unit is configured to: obtain a corresponding routing location identifier from the local mapping entry when the corresponding mapping entry is found locally according to the destination address of the data packet; a mapping entry, then notifying the second query unit;
  • the second query unit is configured to: when receiving the notification, send a query request to the ILR according to a destination address of the data packet, and receive a mapping entry returned by the ILR, from the mapping
  • the method of the embodiment of the present invention can effectively solve the problem of interconnection and interworking between the identity and location separation network and multiple traditional networks.
  • a program to instruct the associated hardware such as a read only memory, a magnetic disk, or an optical disk.
  • all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits.
  • each module/unit in the foregoing embodiment may be implemented in the form of hardware, or may be implemented in the form of a software function module. The invention is not limited to any specific form of combination of hardware and software.
  • the embodiment of the present invention establishes a mapping entry of the traditional network routing information and the ISR at the ILR, and when the packet needs to be forwarded to the traditional network, the corresponding ISR is found according to the mapping entry, and the text is sent to the ISR, and the implementation is implemented. ⁇ Text to the forwarding of traditional networks.

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Abstract

一种身份与位置分离网络与传统网络互联互通方法、ILR和ASR,所述方法包括:身份位置寄存器(ILR)建立包括互通业务路由器(ISR)的路由位置标识与传统网络路由信息的映射条目。该方法通过在ILR处建立传统网络路由信息与ISR的映射条目,在需要将报文转发到传统网络时,根据所述映射条目查找到对应的ISR,将报文发送到改ISR,实现报文到传统网络的转发。

Description

身份位置分离与传统网络互联互通方法、 ILR和 ASR
技术领域
本发明涉及通信技术领域, 尤其涉及一种身份与位置分离网络与传统网 络互联互通的方法、 接入业务路由器(Access Service Router, 简称 ASR )和 身份位置寄存器(Identifier Locator Register, 简称 ILR ) 。
背景技术
现有因特网广泛使用的 TCP/IP ( Transmission Control Protocol/Internet Protocol, 传输控制协议 /互联网络协议)协议中 IP地址具有双重功能, 既作 为网络层的通信终端主机网络接口在网络拓朴中的位置标识, 又作为传输层 主机网络接口的身份标识。 TCP/IP协议在设计之初并未考虑主机移动的情况。 但是, 当主机移动越来越普遍时, 这种 IP地址的语义过载缺陷日益明显。 当 主机的 IP地址发生变化时, 不仅路由发生变化, 通信终端主机的身份标识也 发生变化, 这样将会导致路由负载越来越重, 而且主机标识的变化还将导致 应用和连接的中断。
身份标识和位置分离问题提出的目的是为了解决 IP地址的语义过载和路 由负载严重等问题, 将 IP地址的双重功能进行分离, 实现对移动性、 多家乡 性、 IP地址动态重分配、 减轻路由负载及下一代互联网中不同网络区域之间 的互访等问题的支持。
相关技术中, 基于网络路由器的实现方法是有关身份标识和位置分离的 解决方案之一。
相关技术中, 提出了一种基于网络的身份标识和位置分离方案, 后面将 该方案简称为身份与位置分离网络, 该方案的基本思想是: 将网络划分为接 入层和核心层, 网络中的移动节点有两种标识类型: 身份标识 (Access Identifier,简称 AID )和路由位置标识( Routing-Location Identifier,简称 RID )。 为网络中的每个用户配置唯一的 AID, 该 AID在移动过程中始终保持不变; 在数据转发过程中, AID只能在接入层使用, RID只能在核心层使用; 在用 户终端间应用层通信时 , 使用 AID识别对端。
上述基于网络的身份标识和位置分离框架的拓朴示意图如图 1所示, 主 要包括: 接入业务路由器(Access Service Router, 简称 ASR ) 、 身份位置寄 存器(Identifier Locator Register, 简称 ILR )、 互通业务路由器( Interworking Service Router, 简称 ISR )等。 其中:
ASR负责为各种移动节点提供接入服务, 为接入的用户分配 RID, 并将
ASR在收到终端发来的数据报文时, 根据数据报文中目的地址(即通信 对端的 AID )查询本地緩存 ( CACHE )中的 AID-RID映射表, 如果查到对应 的 AID-RID映射条目, 则将查到的通信终端的 RID封装在数据报文头部, 将 数据报文发送到骨干网进行转发处理; 如果没有查到对应的 AID-RID映射条 目, 则将数据报文转发到骨干网, 并向 ILR发起查询(通信对端的 ) AID-RID 映射信息的流程, 并将 ILR返回对应的 AID-RID映射保存在本地, 以备后续 报文转发时查询。
或者, ASR在没有查到对应的 AID-RID映射条目时, 也可以选择不将数 据报文转发到骨干网, 而是向 ILR发起查询 (通信对端的 ) AID-RID映射信 息的流程,待 ILR返回对应的 AID-RID映射后,将查到的通信终端的 RID封 装在 文头部发送到骨干网进行转发处理。
ASR在收到发往终端的数据报文时, 对数据报文进行解封装处理, 剥去 数据报文中新增的包含 RID的报文头, 发往终端。
ILR主要负责维护网络中用户身份标识和位置标识的映射关系, 并向接 入网关路由器和其它映射服务器提供查询服务。
在相关技术中, 身份与位置分离网络的终端访问传统网络的终端需要通 过 ISR进行互访。
ISR作为身份与位置分离网络与传统网络的互通网关路由器, 向传统网 络发布身份与位置分离网络 AID的路由信息, 传统网络终端访问身份与位置 分离网络的才艮文通过 ISR进入, ISR根据目的地址( AID )查询 AID-RID映 射关系, 进行外层 RID封装。 身份与位置分离网络内终端访问传统网络的报文通过 ISR出口, 具体流 程为, ASR在收到终端发来的报文, 判断目的地址是否身份与位置分离网络 AID范围, 如果不在身份与位置分离网络 AID范围, 则用 ISR的 RID进行外 层封装, 发往 ISR, ISR去掉报文的外层 RID封装, 发往传统网络。
但是在实际组网部署时, 身份与位置分离网络通常会与多个传统网络互 通, 如图 2所示, 也就是说, 身份与位置分离网络会存在多个 ISR, 因此, ASR在收到终端发来的报文,判断目的地址不在身份与位置分离网络 AID范 围内, 无法简单的根据配置进一步判断应该发给哪一个 ISR。
发明内容
本发明实施例要解决的技术问题是提供一种身份与位置分离网络与传统 网络互联互通方法, ILR和 ASR, 解决身份与位置分离网络与传统网络的互 联互通。
为了解决上述问题, 本发明实施例提供了一种身份与位置分离网络与传 统网络互联互通方法, 包括:
身份位置寄存器(ILR )建立包括互通业务路由器(ISR ) 的路由位置标 识与传统网络路由信息的映射条目。
上述方法还可具有以下特点, 所述传统网络路由信息由所述 ISR发送给 所述 ILR。
上述方法还可具有以下特点, 所述 ISR的路由位置标识由所述 ISR发送 给所述 ILR。
上述方法还可具有以下特点,所述方法还包括:所述 ILR接收到多个 ISR 发送的相同的传统网络路由信息时, 为每个 ISR的路由位置标识与所述传统 网络路由信息建立映射条目, 且包含相同传统网络路由信息的映射条目为等 价映射条目。
上述方法还可具有以下特点, 所述等价映射条目中, 每条等价映射条目 中还包括优先级信息。
上述方法还可具有以下特点, 所述等价映射条目中的优先级信息根据所 述 ISR到达该传统网络路由信息的跳数和 /或该 ISR的负荷分担决定。
上述方法还可具有以下特点, 所述方法还包括:
接入业务路由器 (ASR )接收到终端发往传统网络的数据报文时, 从本 地或所述 ILR获取与所述数据报文的目的地址对应的路由位置标识, 使用所 述路由位置标识封装所述数据报文, 发送给所述路由位置标识指示的 ISR。
上述方法还可具有以下特点, 所述从本地或所述 ILR获取与所述数据报 文的目的地址对应的路由位置标识包括:
所述 ASR根据所述数据报文的目的地址在本地查找到对应的映射条目 时, 从本地的所述映射条目中获取对应的路由位置标识; 如果在本地未查找 送查询请求, 接收所述 ILR返回的映射条目, 从所述 ILR返回的映射条目中 获取所述数据报文的目的地址对应的路由位置标识。
本发明还实施例提供一种身份位置寄存器, 所述身份位置寄存器(ILR ) 包括映射关系建立模块, 所述映射关系建立模块设置为建立包括 ISR的路由 位置标识与传统网络路由信息的映射条目。
上述身份位置寄存器还可具有以下特点, 所述 ILR还包括路由信息接收 模块, 设置为接收所述 ISR发送的所述传统网络路由信息。
上述身份位置寄存器还可具有以下特点, 所述路由信息接收模块还设置 为: 接收所述 ISR发送其路由位置标识。
上述身份位置寄存器还可具有以下特点, 所述映射关系建立模块还设置 为: 当所述路由信息接收模块接收到多个 ISR发送的相同的传统网络路由信 息时, 为每个 ISR的路由位置标识与所述传统网络路由信息建立一条映射条 目, 且包含相同传统网络路由信息的映射条目为等价映射条目。
上述身份位置寄存器还可具有以下特点, 所述映射关系建立模块还设置 为: 建立所述等价映射条目时, 在每条等价映射条目中包括优先级信息。
上述身份位置寄存器还可具有以下特点, 所述映射关系建立模块是设置 为根据所述 ISR到达该传统网络路由信息的跳数和 /或该 ISR的负荷分担决定 所述等价映射条目的优先级信息。 本发明实施例还提供一种接入业务路由器, 所述接入业务路由器( ASR ) 包括路由位置信息获取单元和报文发送单元, 其中:
所述路由位置信息获取单元设置为: 接收到终端发往传统网络的数据报 所述报文发送单元设置为: 使用所述路由位置标识封装所述数据报文, 发送给所述路由位置标识指示的 ISR。
上述接入业务路由器还可具有以下特点, 所述路由位置信息获取单元包 括第一查询单元和第二查询单元, 其中:
所述第一查询单元设置为: 根据所述数据报文的目的地址在本地查找到 对应的映射条目时, 从本地的所述映射条目中获取对应的路由位置标识; 如 果在本地未查找到对应的映射条目, 则通知第二查询单元;
所述第二查询单元设置为: 接收到所述通知时, 根据所述数据报文的目 的地址向所述 ILR发送查询请求, 接收所述 ILR返回的映射条目, 从所述映 本发明实施例通过在 ILR处建立传统网络路由信息与 ISR的映射条目, 在需要将报文转发到传统网络时, 根据所述映射条目查找到对应的 ISR, 将 文发送到改 ISR, 实现 "^文到传统网络的转发。 附图概述
图 1为相关技术的基于网络的身份标识和位置分离架构的网络拓朴示意 图;
图 2为相关技术的基于网络的身份标识和位置分离框架的网络与多个传 统网络互通的示意图;
图 3为本发明实施例 ISR与 ILR交互流程;
图 4为本发明实施例身份与位置分离网络终端发送报文到传统网络的处 理流程;
图 5为本发明实施例 ILR框图; 图 6为本发明实施例 ASR框图。 本发明的较佳实施方式
下文中将结合附图对本发明的实施例进行详细说明。 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任意组合。
本发明实施例提供一种身份与位置分离网络与传统网络互联互通方法, 包括:
身份位置寄存器(ILR )建立包括互通业务路由器(ISR ) 的路由位置标 识与传统网络路由信息的映射条目。
其中, 所述传统网络路由信息由所述 ISR发送给所述 ILR。
其中, 所述 ISR的路由位置标识由所述 ISR发送给所述 ILR。
其中, 所述方法还包括: 所述 ILR接收到多个 ISR发送的相同的传统网 络路由信息时, 为每个 ISR的路由位置标识与所述传统网络路由信息建立映 射条目, 且包含相同传统网络路由信息的映射条目为等价映射条目。
其中, 所述等价映射条目中, 每条等价映射条目中还包括优先级信息。 其中, 所述等价映射条目中的优先级信息根据所述 ISR到达该传统网络 路由信息的跳数和 /或该 ISR的负荷分担决定。
其中, 所述方法还包括:
接入业务路由器 (ASR )接收到终端发往传统网络的数据报文时, 从本 地或所述 ILR获取与所述数据报文的目的地址对应的路由位置标识, 使用所 述路由位置标识封装所述数据报文, 发送给所述路由位置标识指示的 ISR。
其中, 所述从本地或所述 ILR获取与所述数据报文的目的地址对应的路 由位置标识包括:
所述 ASR根据所述数据报文的目的地址在本地查找到对应的映射条目 时, 从本地的所述映射条目中获取对应的路由位置标识; 如果在本地未查找 送查询请求, 接收所述 ILR返回的映射条目, 从所述 ILR返回的映射条目中 获取所述数据报文的目的地址对应的路由位置标识。
如图 3所示, ILR建立映射条目的流程包括:
步骤 301 , ISR与 BR通过 BGP路由协议获取传统网络路由信息; 步骤 302, ISR将获取的传统网络路由信息发送给 ILR, 也可发送该 ISR 的 RID信息;
步骤 303 , ILR根据收到的传统网络路由信息和 /或 ISR的 RID信息生成 相应的映射条目; 如果多个 ISR发送的传统网络路由信息有重复, 则生成等 价映射条目;
步骤 304, ILR向 ISR回复应答消息。
上述步骤 302中, 如果 ILR中维护有 ISR的 RID信息, 那么 ISR只需要 发送传统网络的路由信息; 如果 ILR中没有 ISR的 RID信息, 那么 ISR需要 发送传统网络的路由信息以及自己的 RID信息。
上述步骤 303中, 根据路由信息和 RID生成的映射条目示例如下表 1 :
表 1
Figure imgf000009_0001
上述步骤 303中, 等价的映射条目示例如下表 2:
表 2
Figure imgf000009_0002
其中的优先级可以根据 ISR到达该目的地址的跳数、 或者考虑 ISR负荷 分担等因素确定。 优先级 1 , 2...代表不同等级的优先级, 当然, 也可以使用 优先级 A,B,C等,本发明对此不作限定。其中,跳数少和 /或负担轻的等级高, 反之等级低。 当然, 还可以基于其他优先级准则设定优先级。
另外, 等价映射条目中也可以不包含优先级信息。
上述步骤 304可以在步骤 303执行前执行。
身份与位置分离网络中 UE与传统网络互通时报文发送的处理流程如图 4所示:
步骤 401 , UE将发往传统网络的报文发送给 ASR;
步骤 402, ASR根据报文的目的地址查找本地緩存的映射条目, 如果没 有查找到对应的映射条目, 则向 ILR发送查询请求; 如果查找到对应的映射 条目, 则直接转步骤 404;
步骤 403 , ILR根据报文的目的地址查找到映射条目, 返回给 ASR; 该步骤中, 如果该目的地址查找到多个映射条目 (即等价映射条目)时, ILR可以将优先级最高的映射条目返回给 ASR,也可以均返回给 ASR,由 ASR 从中随机选择一个, 或根据优先级选择一个映射条目, 比如选择优先级最高 的映射条目。
步骤 404, ASR根据映射条目中的 RID信息对报文做外层 IP封装; 所述 ASR保存该映射条目, 以备后续使用;
步骤 405, ASR将报文发送给 ISR;
步骤 406, ISR去掉报文外层封装;
步骤 407 , ISR将报文发送给传统网络。
本发明实施例提供一种身份位置寄存器, 如图 5所示, 所述 ILR包括映 射关系建立模块, 所述映射关系建立模块用于建立包括 ISR的路由位置标识 与传统网络路由信息的映射条目。
所述 ILR还包括路由信息接收模块, 设置为接收所述 ISR发送的所述传 统网络路由信息。
其中, 所述路由信息接收模块还设置为: 接收所述 ISR发送其路由位置 标识。
其中, 所述映射关系建立模块还设置为: 当所述路由信息接收模块接收 到多个 ISR发送的相同的传统网络路由信息时, 为每个 ISR的路由位置标识 与所述传统网络路由信息建立一条映射条目, 且包含相同传统网络路由信息 的映射条目为等价映射条目。
其中, 所述映射关系建立模块还设置为: 建立所述等价映射条目时, 在 每条等价映射条目中还包括一优先级信息。
其中, 所述映射关系建立模块还设置为: 根据所述 ISR到达该传统网络 路由信息的跳数和 /或该 ISR 的负荷分担决定所述等价映射条目的优先级信 息。
本发明实施例还提供一种接入业务路由器, 如图 6所示, 所述 ASR包括 路由位置信息获取单元和报文发送单元, 其中:
所述路由位置信息获取单元设置为: 接收到终端发往传统网络的数据报
所述报文发送单元设置为: 使用所述路由位置标识封装所述数据报文, 发送给所述路由位置标识指示的 ISR。
其中, 所述路由位置信息获取单元包括第一查询单元和第二查询单元, 其中:
所述第一查询单元设置为: 根据所述数据报文的目的地址在本地查找到 对应的映射条目时, 从本地的所述映射条目中获取对应的路由位置标识; 如 果在本地未查找到对应的映射条目, 则通知第二查询单元;
所述第二查询单元设置为: 接收到所述通知时, 根据所述数据报文的目 的地址向所述 ILR发送查询请求, 接收所述 ILR返回的映射条目, 从所述映 综上所述, 釆用本发明实施例的方法, 可以有效解决身份与位置分离网 络与多个传统网络的互联互通问题。 本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序 来指令相关硬件完成, 所述程序可以存储于计算机可读存储介质中, 如只读 存储器、 磁盘或光盘等。 可选地, 上述实施例的全部或部分步骤也可以使用 一个或多个集成电路来实现。 相应地, 上述实施例中的各模块 /单元可以釆用 硬件的形式实现, 也可以釆用软件功能模块的形式实现。 本发明不限制于任 何特定形式的硬件和软件的结合。
工业实用性
本发明实施例通过在 ILR处建立传统网络路由信息与 ISR的映射条目, 在需要将报文转发到传统网络时, 根据所述映射条目查找到对应的 ISR, 将 文发送到该 ISR, 实现 "^文到传统网络的转发。

Claims

权 利 要 求 书
1、 一种身份与位置分离网络与传统网络互联互通方法, 其包括: 身份位置寄存器(ILR )建立包括互通业务路由器(ISR ) 的路由位置标 识与传统网络路由信息的映射条目。
2、 如权利要求 1所述的方法, 其中, 所述传统网络路由信息由所述 ISR 发送给所述 ILR。
3、如权利要求 2所述的方法,其中,所述 ISR的路由位置标识由所述 ISR 发送给所述 ILR。
4、 如权利要求 2所述的方法, 其还包括: 所述 ILR接收到多个 ISR发送 的相同的传统网络路由信息时, 为每个 ISR的路由位置标识与所述传统网络 路由信息建立映射条目, 且包含相同传统网络路由信息的映射条目为等价映 射条目。
5、 如权利要求 4所述的方法, 其中, 每条等价映射条目中还包括优先级 信息。
6、 如权利要求 5所述的方法, 其中, 所述等价映射条目中的优先级信息 根据所述 ISR到达该传统网络路由信息的跳数和 /或所述 ISR的负荷分担决 定。
7、 如权利要求 1所述的方法, 其还包括:
接入业务路由器 (ASR )接收到终端发往传统网络的数据报文时, 从本 地或所述 ILR获取与所述数据报文的目的地址对应的路由位置标识, 使用所 述路由位置标识封装所述数据报文, 并发送给所述路由位置标识指示的 ISR。
8、 如权利要求 7所述的方法, 其中, 所述从本地或所述 ILR获取与所述 数据报文的目的地址对应的路由位置标识包括:
所述 ASR根据所述数据报文的目的地址在本地查找到对应的映射条目 时, 从本地的所述映射条目中获取对应的路由位置标识; 如果在本地未查找 送查询请求, 接收所述 ILR返回的映射条目, 从所述 ILR返回的映射条目中 获取所述数据报文的目的地址对应的路由位置标识。
9、 一种身份位置寄存器(ILR ) , 所述 ILR包括映射关系建立模块, 所 述映射关系建立模块设置为建立包括互通业务路由器(ISR )的路由位置标识 与传统网络路由信息的映射条目。
10、 如权利要求 9所述的身份位置寄存器, 所述 ILR还包括路由信息接 收模块, 其设置为接收所述 ISR发送的所述传统网络路由信息。
11、 如权利要求 10所述的身份位置寄存器, 其中, 所述路由信息接收模 块还设置为: 接收所述 ISR发送的该 ISR的路由位置标识。
12、 如权利要求 10所述的身份位置寄存器, 其中,
所述映射关系建立模块还设置为: 当所述路由信息接收模块接收到多个 ISR发送的相同的传统网络路由信息时, 为每个 ISR的路由位置标识与所述 传统网络路由信息建立一条映射条目, 且包含相同传统网络路由信息的映射 条目为等价映射条目。
13、 如权利要求 12所述的身份位置寄存器, 其中, 所述映射关系建立模 块还设置为: 建立所述等价映射条目时, 在每条等价映射条目中包括优先级 信息。
14、 如权利要求 13所述的身份位置寄存器, 其中, 所述映射关系建立模 块是设置为根据所述 ISR到达该传统网络路由信息的跳数和 /或该 ISR的负荷 分担决定所述等价映射条目的优先级信息。
15、 一种接入业务路由器(ASR ) , 所述 ASR包括路由位置信息获取单 元和 ^艮文发送单元, 其中:
所述路由位置信息获取单元设置为: 接收到终端发往传统网络的数据报 文时, 从本地或身份位置寄存器(ILR )获取与所述数据报文的目的地址对应 的路由位置标识;
所述报文发送单元身份位置寄存器: 使用所述路由位置标识封装所述数 据报文, 发送给所述路由位置标识指示的互通业务路由器(ISR ) 。
16、 如权利要求 15所述的接入业务路由器, 其中, 所述路由位置信息获 取单元包括第一查询单元和第二查询单元, 其中:
所述第一查询单元设置为: 根据所述数据报文的目的地址在本地查找到 对应的映射条目时, 从本地的所述映射条目中获取对应的路由位置标识; 如 果在本地未查找到对应的映射条目, 则通知第二查询单元;
所述第二查询单元设置为: 接收到所述通知时, 根据所述数据报文的目 的地址向所述 ILR发送查询请求, 接收所述 ILR返回的映射条目, 从所述映 位置标识。
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