WO2011103744A1 - 移动切换的实现方法、系统和装置 - Google Patents

移动切换的实现方法、系统和装置 Download PDF

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Publication number
WO2011103744A1
WO2011103744A1 PCT/CN2010/076359 CN2010076359W WO2011103744A1 WO 2011103744 A1 WO2011103744 A1 WO 2011103744A1 CN 2010076359 W CN2010076359 W CN 2010076359W WO 2011103744 A1 WO2011103744 A1 WO 2011103744A1
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location
loc
update
mapping
connection
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PCT/CN2010/076359
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English (en)
French (fr)
Inventor
赵凝霞
吴波
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中兴通讯股份有限公司
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Publication of WO2011103744A1 publication Critical patent/WO2011103744A1/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
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W60/00Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H04W60/04Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration using triggered events

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method, system and apparatus for implementing mobile switching in an identity and location separation (IPSPLIT) network.
  • IPSPLIT identity and location separation
  • each layer protocol entity has its own namespace, which is the media access control (MAC) address of the link layer, the internet protocol (IP) address of the network layer, The IP address and port number of the transport layer and the domain name of the application layer.
  • MAC media access control
  • IP internet protocol
  • the IP address and port number of the transport layer and the domain name of the application layer are two important global namespaces in the Internet - the IP address and the domain name.
  • the domain name and IP address are resolved by DNS (Domain Name Server).
  • the IP address has a dual function as both the location identifier of the communication terminal host network interface of the network layer in the network topology and the identity of the transport layer host network interface.
  • host mobility was not considered.
  • NGN Next Generation Networks
  • user mobility and host multihoming problems are becoming more and more problematic.
  • 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. Changes to the route are acceptable, but changes to the host identity can cause disruptions to applications and connections.
  • IPSPLIT ID/locator separation in NGN
  • IPSPLIT technology host identifier As the identity of the host, the host identifier globally uniquely identifies each host connected to the Internet. Its purpose is to separate the transport layer from the network layer, providing a secure host mobile and multi-homed approach to the Internet; providing an encrypted host identity namespace that makes it easier to authenticate both communicating parties for secure, trusted Network system.
  • IP address In an IPSPLIT network, the IP address only indicates the routing location of the communication terminal host in the network topology.
  • IPSPLIT technology solves the semantic overload problem of IP addresses, and doubles the IP address Separation of functions enables support for multi-mobility, multi-homedness, dynamic redistribution of IP addresses, and mutual visits between different network areas.
  • the architecture of IPSPLIT includes network access control part, identity and location separation control part, identity and location separation mapping part, resource control part, transmission part, service control function part and user terminal/user network part.
  • the network access control part provides functions such as registration, authentication authorization, address allocation, parameter configuration, and location management for the user terminal/user network accessing the NGN network, for example, the network attachment control function in the IPSPLIT network shown in FIG. 1 ( Network Attachment Control Functions (NACF).
  • NCF Network Attachment Control Functions
  • Id-loc-mapping control functions Id-loc-mapping control functions (ILMCF for short) store and dynamically update ID/LOC mappings.
  • the resource control part performs functions such as admission control and resource reservation when the user terminal/user network accesses the network based on the policy and network resource status, for example, Resource and Admission Control Functions (RACF) in the ITU-T NGN network. ), Acess management functions in NGN.
  • the transmission part completes the transmission function of information, such as the Transport Functions in the ITU-T NGN network.
  • the Service Control Functions part is part of the service stratum, which performs registration, authentication, and resource control functions at the service level, such as service terminal authentication and authentication in the ITU-T NGN network. .
  • the user terminal/user network part provides network access functions to the user, such as UE (User Equipment) in the ITU-T NGN network.
  • NACF contains the following functional entities:
  • TUP-FE Transport User Profile Functional Entity
  • the Transport Authentication and Authorization Functional Entity (TAA-FE) is used to provide the transport layer authentication and authentication functions, and performs user authentication and authorization check based on user information.
  • the Access Management Functional Entity is used to translate the network access request initiated by the user, and send a request for assigning an IP address and other network configuration parameters to the NAC-FE;
  • the Transport Location Management Functional Entity is used to register the IP address assigned to the user and other network location information provided by the NAC-FE.
  • the Network Access Configuration Functional Entity (NAC-FE) is used to allocate IP addresses to user terminals, and may assign other network configuration parameters to the user terminals, such as the address of the DNS server and the signaling agent. Address, etc.
  • the Id-loc-split mapping storage function entity (ILMS-FE) is used as the user identity and location separation mapping storage entity in the NGN to store the user identity Node ID and Mapping of one or more location LOCs;
  • the Id-loc-split mapping update function entity (ILMU-FE) is used as the user identity and location separation mapping update entity in the NGN to implement the user identity node ID and An update of the mapping of one or more location LOCs.
  • the functional entities included in the transfer function are:
  • the Id-loc-split mapping function entity (ILM-FE) is used as the mapping database entity of the user identity and location separation system in the NGN, and is used to implement the user identity node ID and Mapping of one or more location LOCs; Policy enforcement functional entity (PE-FE), which is a functional entity of transport layer policy enforcement.
  • the functional entities included in the business control function are:
  • Service User Profile Functional Entity (SUP-FE) is used to configure user information of the service layer.
  • the terminal obtains the IP address of its peer in the mapping server ILMS-FE/ILMU-FE through DNS query.
  • the terminal UE obtains its own mapping server ILMS-FE/ILMU-FE. IP address.
  • the technical problem to be solved by the present invention is to provide a method, system and device for implementing mobile switching in an identity identification and location separation network, which realizes seamless handover of the UE and ensures service continuity.
  • the present invention provides a method for implementing mobile switching in an identity identification and location separation network, including:
  • the UE when the location of the terminal (UE) changes, the UE requests the identity identifier and the location separation mapping control function entity (ILMCF) to update the mapping relationship between the UE identity identifier (Node ID) and the location (LOC);
  • IMCF location separation mapping control function entity
  • the UE updates the connection with the communication peer, establishes a channel, and communicates.
  • the step of the UE requesting the ILMCF to update the mapping relationship between the Node ID and the LOC includes: the UE sending an identity identifier and a location mapping update query to the ILMCF, where the ILMCF queries the Node ID of the UE as an index, if And the LOC corresponding to the Node ID is updated to the current LOC of the UE, and if there is no LOC corresponding to the Node ID, the UE is notified to perform identity identification and location mapping registration, where the registration is performed.
  • the mapping relationship between the Node ID of the UE and the current LOC is saved in the process.
  • the step of the UE requesting the ILMCF to update the mapping relationship between the Node ID and the LOC further includes: if the ILMCF determines that there is no LOC corresponding to the Node ID, returning an identity identifier and a location mapping update response carrying the update failure to the UE After receiving the response, the UE sends an identity identifier and a location mapping registration query request to the ILMCF to request a registration relationship between the Node ID and the current LOC. After receiving the request, the ILMCF saves the Node ID of the UE. A mapping relationship with the current LOC, returning an identity and location mapping registration response to the UE.
  • the step of the UE updating the connection with the communication peer includes: the UE sending a message with a connection parameter to the communication peer, the connection parameter includes a current LOC of the UE, and the communication peer receives the connection After the message of the parameter, the response message is sent to the UE, and after receiving the response message sent by the communication peer, the UE returns a response message to the communication peer after verifying that the message is a message sent by the communication peer. After receiving the response message sent by the UE, the communication peer end updates the local connection to a connection with the current location of the UE.
  • the connection parameters also include the lifetime of the current LOC, the security parameters of the old connection, and the security parameters of the new connection.
  • the step of the UE updating the connection with the communication peer further includes: if the location of the communication peer is changed, the current LOC of the communication peer is obtained by reading the mapping server, and the UE updates the connection to the current LOC and the communication of the UE.
  • the connection between the current LOC of the peer is not limited to: if the location of the communication peer is changed, the current LOC of the communication peer is obtained by reading the mapping server, and the UE updates the connection to the current LOC and the communication of the UE. The connection between the current LOC of the peer.
  • the present invention further provides an implementation system for mobile handover in an identity identification and location separation network, comprising: an identity identification and location separation mapping control function entity (ILMCF) and a terminal UE, where:
  • IMCF identity identification and location separation mapping control function entity
  • the UE is configured to: when the location changes, request the ILMCF to update the mapping relationship between the identity identifier (Node ID) and the location (LOC) of the UE; and update the connection with the communication peer end, establish a channel and communicate;
  • the ILMCF is configured to: update a mapping relationship between a Node ID and a LOC of the UE.
  • the present invention further provides an apparatus for implementing mobile switching in an identity identification and location separation network, comprising: a receiving and sending module and a mapping relationship updating module, wherein: the receiving and sending module is configured as: a receiving terminal (UE) The sent identity and location update request or identity and location registration request;
  • UE receiving terminal
  • the mapping relationship update module is configured to: after the receiving and sending module receives the identity identifier and the location update request sent by the UE, update the locally saved location corresponding to the UE identity identifier to the current location of the UE; And after the receiving and transmitting module receives the identity identifier and the location registration request sent by the UE, saving a mapping relationship between the identity identifier of the UE and the current location.
  • the present invention further provides a terminal for implementing mobile switching in an identity identification and location separation network, including an update request module and a connection update module, where:
  • the update request module is configured to: when the terminal location changes, requesting an identity identifier and a location separation mapping control function entity (ILMCF) to update a mapping relationship between an identity identifier (Node ID) and a location (LOC) of the UE;
  • the connection update module is configured to: when the terminal location changes, update the connection with the communication peer, establish a channel, and communicate.
  • the update request module is configured to: send an identity and location update request to the ILMCF to request the ILMCF to update the mapping relationship between the Node ID and the LOC of the terminal, after receiving the response of the update failure returned by the ILMCF And sending an identity and location registration request to the ILMCF to request the ILMCF to update a mapping relationship between the Node ID and the LOC of the terminal.
  • the method, system and device of the present invention can implement seamless handover of the UE, ensure that the UE does not interrupt communication when moving, and improve the user experience.
  • Figure 1 Schematic diagram of the NGN architecture of IPSPLIT technology
  • FIG. 3 is a schematic diagram of an implementation flow of a mobile handover in an IPSPLIT network according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of an implementation flow of a mobile handover in an IPSPLIT network according to Embodiment 2 of the present invention
  • FIG. 5 is a schematic structural diagram of a system for implementing mobile handover according to the present invention.
  • the present invention provides the following mobile handover procedure for ensuring service continuity between communication terminals in motion:
  • the UE In an Ipsplit network, in the communication process, when the UE location changes, the UE separates the identity identification from the location mapping control function entity (ILMCF) Sending an identity (Node ID) and a location (LOC) mapping request, requesting the ILMCF to update a mapping relationship between the Node ID and the LOC of the UE, the ILMCF updating a mapping relationship between the identity and the location of the UE, the UE updating Establish a channel and communicate with the peer.
  • ILMCF location mapping control function entity
  • LOC location
  • Each UE stores the mapping of the identity and location of the UE in the ILMCF (ID/LOC mapping)
  • the method of updating the ID/LOC mapping relationship by the ILMCF includes: when the ILMCF receives the identity and location mapping request sent by the UE, querying the saved ID/LOC mapping table by using the Node ID of the UE, if The LOC corresponding to the Node ID is updated to the current LOC of the UE, and if there is no LOC corresponding to the Node ID (including the case where there is no Node ID and the case where there is no LOC), then The UE is notified to perform ID/LOC mapping registration, and the mapping relationship between the Node ID of the UE and the current LOC is saved in the ID/LOC mapping registration process of the UE.
  • the above update operation is performed by a mapping server in the ILMCF, the mapping server including ILMS-FE and ILMU-FE, and ILMS-FE and ILMU-FE may be combined into one logical entity.
  • the above UE may be the originator of the communication or the called party.
  • the mapping server updates the mapping relationship between the identity of the UE and the current location.
  • the location of the communication peer (UE2) of the UE1 changes, the UE1 cannot update the connection through the original location of the UE2, and the UE1 needs to be configured from the mapping server. It may be the same as, or different from, the mapping server of UE1) to read the new location of UE2 to update the connection to the connection between the current LOC of the UE and the current LOC of UE2.
  • the third-party terminal can enable the third-party terminal to initiate communication with the UE1.
  • the step of the UE updating the connection with the peer, establishing the channel, and communicating includes: establishing a connection between the UE1 and the peer user UE2 through a basic exchange (HIP protocol terminology), specifically, the UE1 sends a message with the connection parameter to the UE2.
  • the connection parameter includes at least the current LOC of the UE1.
  • the UE2 sends a response message to the UE1.
  • the UE1 verifies that the message is a message sent by the UE2.
  • the UE2 updates the local connection to the connection with the current location of the UE1 after receiving the response message sent by the UE1.
  • the UE1 further includes security parameters of the new and old connections in the connection parameters sent to the UE2 to establish a secure connection.
  • connection After the connection is updated, the channel is established, and both parties use the new connection channel to transmit and receive data.
  • the step of updating the Node ID and the LOC mapping relationship by the above ILMCF may be performed simultaneously with the step of the UE updating and the communication peer connection.
  • ILMS-FEl/ILMU-FEl is the ID/LOC mapping server of UE1
  • ILMS-FE2/ILMU-FE2 is the ID/LOC mapping server of UE2.
  • UE1 obtains a new IP address (the step of UE1 obtaining a new IP address can be implemented by using the prior art), that is, obtaining a new LOC 1 but mapping server at UE1 no mapping table ID / LOC 1 mapping information, UE1 mapped to be registered in the server ID / LOC 1 mapping:
  • Step 101 UE1 transmission identifier and location mapping update query (map update query) to their mapping server ILMS-FEl / ILMU-FEl, requests the Node ID and identity mapping LOC LOC. 1 updates the current position;
  • Step 102 After receiving the identity and location mapping update query, the ILMS-FEl/ILMU-FEl performs an ID/LOC mapping query with the Node ID of the UE1, because the ID of the UE1 is not in the ILMS-FEl/ILMU-FEl.
  • the LOC 1 mapping information is returned to the UE1 to carry an identity failure and a location mapping update response (total update response) to the UE;
  • Step 103 After receiving the identity identifier and the bitmap update response carrying the update failure, the UE1 sends the identity identifier and the location mapping register query to the mapping server ILMS-FEl/ILMU-FEl, requesting the registration identity node ID. a mapping relationship with the current location LOC 1 ;
  • Step 104 After receiving the identity tag and the location mapping register query, the ILMS-FEl/ILMU-FEl stores the identity of the identity node Node ID, the current location LOC 1 and the corresponding relationship in the ILMS-FEl/ILMU-FEl, and returns the identity identifier and Position mapping register reponse (UE registration response) to UE1; Connection update steps:
  • Step 201 UE1 updates a connection with the peer UE2.
  • connection parameters include the following parameters: UE1's new LOC 1 new LOC 1 lifetime, old connected security parameters, and newly connected security parameters. After sending the message, UE1 waits for confirmation from the peer UE2 and retransmits if necessary.
  • UE2 After receiving the message sent by UE1 and verifying, UE2 updates the local connection. After Specifically, UE2 receive a message with the connection parameters in order to authenticate the new LOC 1, carries in a response message response parameters sent to the UE1, the UE1 for verification of this message to the UE2 transmitted message, and The response message is sent to LOC 1 of UE1. UE1 after receiving a response message from UE2, verify that the message is the message sent by the UE2, LOC modification process is completed, and returns a response message to UE2, UE2 after receiving the response message, LOC 1 verified that the updated local connection For the connection with the new LOC 1 .
  • Step 301 After the connection is updated, the channel establishment is completed, and UE1 and UE2 use a new connection channel to encapsulate or unpack the data.
  • the initiator (or responder) to move to a new location communication process LOC 1, there ID / LOC 1 in which mapping information mapping table mapping the server, i.e. The initiator has previously used LOC 1 .
  • UE1 In communication, when the UE1 location moves, that is, the handover occurs, UE1 obtains a new IP address, that is, obtains a new LOC 1 , and there is ID/LOC 1 mapping information in the mapping table of the mapping server of UE1, and UE1 needs to update its mapping.
  • Step 401 UE1 transmits identity mapping update query to the location server which maps ILMS-FE1 / ILMU-FE1, requests the Node ID and the identity mapping is updated to the current location LOC LOC. 1;
  • Step 402 ILMS-FE1/ILMU-FE1 receives the identity and location mapping update After Query, the Node ID to the UEl for ID / LOC mapping queries, found the presence of Node ID of the UE, and maps the Node ID LOC updated to the current location LOC 1, returns the update success carrying identity and position mapping Update response to the UE;
  • Step 501 UE1 updates a connection with the peer UE2.
  • connection parameters include the following parameters: UE1's new LOC 1 , new LOC 1 lifetime, old connection security parameters, and new connection security parameters.
  • UE1 waits for confirmation from the peer UE2 and retransmits if necessary.
  • UE2 After receiving the message sent by UE1 and verifying, UE2 updates the local connection. Specifically, UE2 after receiving the message with the connection parameters, in order to verify the new LOC 1, will carry the parameter in the response message transmitted in response to the UE1, and transmits the response message to the UE1 receives the LOC ⁇ UEl UE2 response message, after verifying that the message is a message sent by the UE2, LOC modification process is completed, UE2 returns a response message to the UE2 after receiving the response message, LOC 1 verified that the local connection is updated with the new The connection between LOC 1 .
  • Step 601 After the connection is updated, the channel establishment is completed, and UE1 and UE2 use a new connection channel to encapsulate or unpack the data.
  • ILMCF and UE The system implementing the above method is as shown in FIG. 5: ILMCF and UE, where:
  • the UE is configured to request the ILMCF to update a Node of the UE when a location changes.
  • the ILMCF is used to update a mapping relationship between the Node ID and the LOC of the UE.
  • the ILMCF includes a receiving and sending module and a mapping relationship updating module, where: the receiving and sending module is configured to receive an identity identifier and a location update request (such as an identity identifier and a location mapping update query) or an identity identifier sent by the UE.
  • Location registration request (such as identity and location mapping registration query);
  • the mapping relationship update module is configured to: after the receiving and sending module receives the identity identifier and the location update request sent by the UE, update the locally saved location corresponding to the UE identity identifier to the current location of the UE; And for receiving, by the receiving and transmitting module, the body sent by the UE After the identity and location registration request, the mapping relationship between the identity of the UE and the current location is saved.
  • the UE includes an update request module and a connection update module, where:
  • the update requesting module is configured to request the ILMCF to update a mapping relationship between the Node ID and the LOC of the UE when the location of the UE changes.
  • the connection update module is configured to update a connection with the communication peer when the location of the UE changes, establish a channel, and communicate.
  • the UE's update request module sends an identity and location mapping request (possibly an identity and location update request, or includes an identity and location update request and identity) to the receiving and transmitting module in the ILMCF when it learns that the location of the UE changes. And the receiving and sending module of the ILMCF, after receiving the request of the UE, triggering the mapping relationship update module to update the identity and the mapping relationship of the UE, where the mapping relationship update module is used by the UE
  • the Node ID is queried for the index. If there is a LOC corresponding to the Node ID, the LOC is updated to the current LOC of the UE.
  • the receiving and transmitting module notifies the The UE performs identity identification and location mapping registration, and saves the mapping relationship between the Node ID of the UE and the current LOC in the registration process.
  • the update request module of the UE preferably triggers the connection update module to update the connection with the communication peer when the location of the UE is changed, or may be actively updated and communicated by the connection update module when the location of the UE is changed. The connection to the peer.
  • the method, system and device of the present invention can implement seamless handover of the UE, ensure that the UE does not interrupt communication when moving, and improve the user experience.

Description

移动切换的实现方法、 系统和装置
技术领域
本发明涉及通信技术领域,尤其涉及一种身份标识与位置分离( IPSPLIT ) 网络中移动切换的实现方法、 系统和装置。
背景技术
当前因特网的各层结构中, 除了物理层以外, 各层协议实体均有自己的 名字空间, 分别是链路层的媒体接入控制 (MAC )地址、 网络层的互联网络 协议(IP )地址、 传输层的 IP地址和端口号和应用层的域名。 在这些名字空 间中, MAC地址只要求在子网内唯一, 而端口号只要求在主机内部唯一, 因 此, 因特网中存在两个重要的全局名字空间—— IP地址和域名。 域名和 IP地 址中间通过 DNS ( Domain Name Server, 域名服务器) 实现解析。 在这样的 名字空间结构中, 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设计之初并没有考虑主机移动的情况, 但是, 随着 NGN ( Next Generation Networks, 下一代网络) 的发展, 用户移动性 ( mobility )和主机 多穴性( multihoming )的问题越来越普遍, 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, 不仅路由要发生变化, 通信终端主机的 身份标识也发生变化。 对于路由的变化是可以接受的, 但是主机身份标识的 变化却会导致应用和连接的中断。
为了支持移动性和多穴性, 更好的支持通话的连续性, 业界提出了 IPSPLIT ( ID/locator separation in NGN, 下一代网络中身份标识与位置分离) 技术, IPSPLIT技术用主机标识符( Node ID )作为主机的身份标识, 主机标 识符全球唯一地标识每台连接到 Internet的主机。其目的是将传输层与网络层 分开, 为 Internet提供一个安全的主机移动和多宿主的方法; 提供一个加密的 主机标识命名空间, 更容易地对通信双方进行认证, 从而实现安全的、 可信 任的网络系统。 在 IPSPLIT网络中, IP地址仅表示通信终端主机在网络拓朴 中的路由位置。 IPSPLIT技术解决 IP地址的语义过载问题, 将 IP地址的双重 功能进行分离, 实现对多移动性、 多穴性、 IP地址动态重分配及不同网络区 域之间的互访等问题的支持。
IPSPLIT 的体系架构包括网络接入控制部分、 身份标识与位置分离控制 部分、 身份标识与位置分离映射部分、 资源控制部分、 传输部分、 业务控制 功能部分和用户终端 /用户网络部分。 其中, 网络接入控制部分为接入 NGN 网络的用户终端 /用户网络提供注册、 鉴权授权、 地址分配、 参数配置、 位置 管理等功能, 例如图 1 所示的 IPSPLIT 网络中网络附着控制功能(Network Attachment Control Functions, 简称为 NACF ) 。 身份标识与位置分离映射控 制功能( Id-loc-mapping control functions, 简称为 ILMCF )进行 ID/LOC映射 的存储和动态更新。 资源控制部分基于策略和网络资源状态, 完成用户终端 / 用户网络接入网络时接纳控制、 资源预留等功能, 例如 ITU-T NGN网络中资 源接纳控制功能( Resource and Admission Control Functions, 简称为 RACF ) , NGN中接入管理功能( Acess management Functions ) 。 传输部分完成信息的 传输功能, 例如 ITU-T NGN网络中传输功能(Transport Functions )。 业务控 制功能( Service Control Functions )部分属于业务层( Service stratum )中的一 部分,在业务层次上完成注册、鉴权授权、资源控制等功能,例如 ITU-T NGN 网络中业务终端认证和鉴权过程。 用户终端 /用户网络部分向用户提供网络接 入功能, 例如 ITU-T NGN网络中 UE ( User Equipment, 用户设备 ) 。
IPSPLIT体系功能框架如图 2所示。
其中, NACF包含如下功能实体:
传输层用户配置功能实体 ( Transport User Profile Functional Entity, 简称 为 TUP-FE )用于负责保存与传输层面相关的用户信息;
认证和婆权功能实体 ( Transport Authentication and Authorization Functional Entity, 简称为 TAA-FE )用于提供传输层鉴权和认证功能, 基于用 户信息对用户的网络接入执行鉴权和授权检查;
接入管理功能实体( Access Management Functional Entity,简称为 AM-FE ) 用于对用户发起的网络接入请求进行翻译转换, 将分配 IP地址和其他网络配 置参数的请求发送给 NAC-FE; 传输层位置管理功能实体 ( Transport Location Management Functional Entity, 简称为 TLM-FE )用于注册分配给用户的 IP地址和 NAC-FE提供的其 它网络位置信息;
网络接入管理功能实体( Network Access Configuration Functional Entity, 简称为 NAC-FE )用于负责向用户终端分配 IP地址, 同时可能向用户终端分 配其他网络配置参数, 如 DNS服务器的地址、 信令代理的地址等;
身份标识与位置分离映射存储功能实体 ( Id-loc-split mapping storage function entity, 简称为 ILMS-FE ) , 它作为 NGN中用户身份标识与位置分离 映射存储实体,用于存储用户身份标识 Node ID与一个或多个位置 LOC的映 射;
身份标识与位置分离映射更新功能实体 ( Id-loc-split mapping update function entity, 简称为 ILMU-FE ) , 它作为 NGN中用户身份标识与位置分离 映射更新实体,用于实现用户身份标识 Node ID与一个或多个位置 LOC的映 射的更新。
传输功能包含的功能实体有:
身份标识与位置分离映射功能实体 ( Id-loc-split mapping function entity , 简称为 ILM-FE ) , 它作为 NGN中用户身份标识与位置分离系统的映射数据 库实体, 用于实现用户身份标识 Node ID与一个或多个位置 LOC的映射; 策略执行功能实体(Policy enforcement functional entity, PE-FE ) , 它是 传输层策略执行的功能实体。
业务控制功能包含的功能实体为:
业务层用户配置功能实体 ( Service User Profile Functional Entity, 简称为 SUP-FE )用于负责配置业务层用户信息。
但是, IPSPLIT网络中, 终端(UE )通过 DNS查询获得其对端在映射服 务器 ILMS-FE/ILMU-FE中的 IP地址, 通过配置, 终端 UE获得自己所在映 射服务器 ILMS-FE/ILMU-FE的 IP地址。 当通信的终端 UE因移动性从一个 位置移到另一个位置, 需要提供一种移动切换方法, 以保证移动中的终端通 信不中断, 即应用和业务层的连续性。 发明内容
本发明要解决的技术问题是提供一种身份标识与位置分离网络中移动切 换的实现方法、 系统和装置, 实现 UE的无缝切换, 保证业务连续性。
为解决上述技术问题, 本发明提供了一种身份标识与位置分离网络中移 动切换的实现方法, 包括:
通信过程中, 当终端 (UE )位置发生改变, 所述 UE请求身份标识与位 置分离映射控制功能实体(ILMCF )更新所述 UE身份标识(Node ID )与位 置 (LOC ) 的映射关系;
所述 UE更新与通信对端的连接, 建立通道并通信。
所述 UE请求 ILMCF更新其 Node ID与 LOC的映射关系的步骤包括: 所述 UE向 ILMCF发送身份标识与位置映射更新查询, 所述 ILMCF以所述 UE的 Node ID为索引进行查询, 如果存在与所述 Node ID对应的 LOC, 则 将该 LOC更新为所述 UE当前的 LOC, 如果不存在与所述 Node ID对应的 LOC, 则通知所述 UE进行身份标识与位置映射注册, 在所述注册过程中保 存所述 UE的 Node ID与当前 LOC的映射关系。
所述 UE请求 ILMCF更新其 Node ID与 LOC的映射关系的步骤还包括: ILMCF如果判断不存在与所述 Node ID对应的 LOC, 则向所述 UE返回携带 更新失败的身份标识与位置映射更新响应, 所述 UE收到该响应后, 向所述 ILMCF发送身份标识与位置映射注册查询请求, 请求注册 Node ID 与当前 LOC的映射关系, 所述 ILMCF收到请求后, 保存所述 UE的 Node ID与当前 LOC的映射关系, 返回身份标识与位置映射注册响应给所述 UE。
所述 UE更新与通信对端的连接的步骤包括:所述 UE向通信对端发送带 有连接参数的消息, 所述连接参数包括所述 UE的当前 LOC, 所述通信对端 收到带有连接参数的消息后, 向所述 UE发送响应消息, 所述 UE接收所述通 信对端发送的响应消息后, 在验证该消息为通信对端发送的消息后, 向所述 通信对端返回响应消息, 所述通信对端收到所述 UE发送的响应消息后, 将 本地连接更新为与所述 UE当前位置之间的连接。 所述连接参数还包括当前 LOC的生命期、旧连接的安全参数和新连接的 安全参数。
所述 UE更新与通信对端的连接的步骤还包括: 如果发现通信对端的位 置发生改变, 通过读取映射服务器, 获取通信对端的当前 LOC, 所述 UE将 连接更新为所述 UE当前 LOC与通信对端当前 LOC之间的连接。
为解决上述技术问题, 本发明还提供了一种身份标识与位置分离网络中 移动切换的实现系统,包括:身份标识与位置分离映射控制功能实体(ILMCF ) 和终端 UE, 其中:
所述 UE设置为: 在位置发生改变时, 请求所述 ILMCF更新所述 UE的 身份标识(Node ID )与位置(LOC )的映射关系; 以及更新与通信对端的连 接, 建立通道并通信;
所述 ILMCF设置为: 更新所述 UE的 Node ID与 LOC的映射关系。
为解决上述技术问题, 本发明还提供了一种实现身份标识与位置分离网 络中移动切换的装置, 包括接收发送模块和映射关系更新模块, 其中: 所述接收发送模块设置为: 接收终端(UE )发送的身份标识与位置更新 请求或者身份标识与位置注册请求;
所述映射关系更新模块设置为: 在所述接收发送模块接收到 UE发送的 身份标识与位置更新请求后, 将本地保存的与所述 UE身份标识对应的位置 更新为所述 UE的当前位置;以及在所述接收发送模块接收到 UE发送的身份 标识与位置注册请求后, 保存所述 UE的身份标识与当前位置的映射关系。
为解决上述技术问题, 本发明还提供了一种实现身份标识与位置分离网 络中移动切换的终端, 包括更新请求模块和连接更新模块, 其中:
所述更新请求模块设置为: 在所述终端位置发生改变时, 请求身份标识 与位置分离映射控制功能实体( ILMCF )更新所述 UE的身份标识( Node ID ) 与位置 (LOC ) 的映射关系; 所述连接更新模块设置为: 在所述终端位置发生改变时, 更新与通信对 端的连接, 建立通道并通信。
所述更新请求模块是设置为: 向 ILMCF发送身份标识与位置更新请求, 以请求所述 ILMCF更新所述终端的 Node ID与 LOC的映射关系, 在接收到 所述 ILMCF返回的更新失败的响应后, 向所述 ILMCF发送身份标识与位置 注册请求, 以请求所述 ILMCF更新所述终端的 Node ID与 LOC的映射关系。
釆用本发明所述方法、 系统和装置, 可以实现 UE的无缝切换, 保证 UE 移动时通信不中断, 提高用户体验。 附图概述
图 1 于 IPSPLIT技术的 NGN体系架构示意图;
图 于 IPSPLIT技术的 NGN体系功能框架示意图;
图 3是本发明实施例一 IPSPLIT网络中移动切换的实现流程示意图; 图 4是本发明实施例二 IPSPLIT网络中移动切换的实现流程示意图; 图 5是本发明实现移动切换的系统结构示意图。 本发明的较佳实施方式
在 IPSPLIT网络中, UE通信过程中如果发生移动切换, 即 LOC发生改 变, 必须保证业务层和应用层的连续性。
本发明为保证移动中的通信终端间的业务连续性提供如下移动切换流 程: 在 Ipsplit网络中, 在通信过程中, 当 UE位置发生改变, UE向身份标识 与位置分离映射控制功能实体(ILMCF )发送身份标识 (Node ID ) 与位置 ( LOC ) 映射请求, 请求 ILMCF更新所述 UE的 Node ID与 LOC的映射关 系, 所述 ILMCF更新所述 UE的身份标识与位置的映射关系, 所述 UE更新 与对端的连接, 建立通道并通信。
每个 UE在 ILMCF中存储本 UE的身份标识与位置的映射( ID/LOC映 射), ILMCF更新 ID/LOC映射关系的步骤包括, 当 ILMCF接收到 UE发送 的身份标识与位置映射请求时, 以所述 UE的 Node ID为索引查询其保存的 ID/LOC映射表, 如果存在与所述 Node ID对应的 LOC, 则将该 LOC更新为 所述 UE当前的 LOC, 如果不存在与所述 Node ID对应的 LOC (包括不存在 Node ID的情况和不存在 LOC的情况) , 则通知 UE进行 ID/LOC映射注册, 在 UE的 ID/LOC映射注册过程中保存所述 UE的 Node ID与当前 LOC的映 射关系。
优选地, 上述更新操作由 ILMCF中的映射服务器完成, 所述映射服务器 包括 ILMS-FE和 ILMU-FE, ILMS-FE和 ILMU-FE可以合成为一个逻辑实体。
上述 UE可能是通信的发起方或者是被叫方。
映射服务器更新 UE的身份标识与当前位置的映射关系的好处在于, 当 UE1的通信对端( UE2 )发生位置改变时, 此时 UE1无法通过 UE2原来的位 置更新连接, 则 UE1需要从映射服务器 (可能与 UE1的映射服务器相同, 也 可能不同 )读取 UE2新的位置, 以将连接更新为本 UE当前 LOC与 UE2当 前 LOC之间的连接。 另外, 映射服务器更新 UE1的身份标识与位置的映射 关系后, 可以使第三方终端能够发起与 UE1的通信。
UE更新与对端连接、建立通道并通信的步骤包括, UE1与对端用户 UE2 之间通过基本交换(HIP协议术语) , 建立连接, 具体地, 所述 UE1向 UE2 发送带有连接参数的消息, 所述连接参数中至少包含 UE1的当前 LOC, 所述 UE2收到带有连接参数的消息后, 向 UE1发送响应消息, UE1接收 UE2发 送的响应消息后,在验证该消息为 UE2发送的消息后,向 UE2返回响应消息, UE2收到 UE1发送的响应消息后,将本地连接更新为与所述 UE1当前位置之 间的连接。优选地, 所述 UE1在向 UE2发送的连接参数中还包含新、 旧连接 的安全参数, 以建立安全连接。
连接更新后通道建立完成, 通信双方使用新的连接通道进行数据的发送 与接收。
上述 ILMCF更新 Node ID与 LOC映射关系的步骤与 UE更新与通信对 端连接的步骤可能同时进行。 下面结合附图及具体实施例对本发明进行详细说明。
实施例一
如图 3所示, 在本实施例中, 通信过程中的发起方 (或响应方)移动到 一个新的位置 LOC1 , 在其映射服务器映射表中没有 ID/ LOC1映射信息。 图 中, ILMS-FEl/ILMU-FEl为 UE1的 ID/LOC映射服务器, ILMS-FE2/ILMU-FE2 为 UE2的 ID/LOC映射服务器。
ID/LOC映射注册 /更新步骤:
通信中,当 UE1位置发生移动,即发生切换, UE1获得新的 IP地址(UE1 获得新的 IP地址的步骤可釆用现有技术实现 ) , 即获得新的 LOC1 ,但在 UE1 的映射服务器的映射表中没有 ID/LOC1映射信息, UE1要在其映射服务器中 注册的 ID/LOC1映射:
步骤 101 , UE1发送身份标识与位置 mapping update query (映射更新查 询)给其映射服务器 ILMS-FEl/ILMU-FEl , 请求将与身份标识 Node ID映射 的 LOC更新为当前位置 LOC1;
步骤 102, ILMS-FEl/ILMU-FEl接收到身份标识与位置 mapping update query 后, 以所述 UE1 的 Node ID 进行 ID/LOC 映射查询, 由于 ILMS-FEl/ILMU-FEl中没有该 UE1的 ID/ LOC1映射信息, 向该 UE1返回携 带更新失败的身份标识与位置 mapping update response (映射更新响应 )给 UE;
步骤 103 , UE1 收到携带更新失败的身份标识与位映射更新响应后, 发 送身份标识与位置 mapping register query (映射注册查询)给其映射服务器 ILMS-FEl/ILMU-FEl , 请求注册身份标识 Node ID与当前位置 LOC1的映射 关系;
步骤 104, ILMS-FEl/ILMU-FEl接收到身份标识与位置 mapping register query后, 在 ILMS-FEl/ILMU-FEl存储身份标识 Node ID、 当前位置 LOC1 以及二者的对应关系, 返回身份标识与位置 mapping register reponse (映射注 册响应)给 UE1 ; 连接更新步骤:
步骤 201 , UE1更新与对端 UE2的连接;
UE1发送带有连接参数的消息给 UE2。 所述连接参数中包含以下参数: UE1的新的 LOC1 新的 LOC1的生命期、 旧连接的安全参数和新连接的安全 参数。 UE1发送该消息后, 等待来自对端 UE2的确认, 如有必要, 会进行重 发。
UE2收到 UE1发送的消息并验证后, 更新本地连接。 具体地, UE2收到 带有连接参数的消息后, 为了对新的 LOC1进行验证, 会在向 UE1发送的响 应消息中携带响应参数,用于使 UE1验证本消息为 UE2发送的消息, 并将所 述响应消息发送到 UE1的 LOC1。 UE1接收来自 UE2的响应消息, 在验证该 消息为 UE2发送的消息后, 完成 LOC修改过程, 并向 UE2返回响应消息, 所述 UE2收到响应消息后, 认为 LOC1验证完成, 将本地连接更新为与新的 LOC1之间的连接。
步骤 301 , 连接更新后通道建立完成, UE1与 UE2使用新的连接通道将 数据封装发送或解封操作。
实施例二
如图 4所示, 在本实施例中, 通信过程中的发起方 (或响应方)移动到 一个新的位置 LOC1 , 在其映射服务器映射表中存有 ID/ LOC1映射信息, 也 就是发起方以前使用过 LOC1
ID/LOC映射注册 /更新步骤:
通信中, 当 UE1位置发生移动, 即发生切换, UE1获得新的 IP地址, 即获得新的 LOC1 ,且在 UE1的映射服务器的映射表中有 ID/ LOC1映射信息, UE1需要更新其映射服务器中注册 ID/ LOC1映射:
步骤 401 , UE1发送身份标识与位置 mapping update query给其映射服务 器 ILMS-FE1/ILMU-FE1 , 请求将与身份标识 Node ID映射的 LOC更新为当 前位置 LOC1;
步骤 402, ILMS-FE1/ILMU-FE1接收到身份标识与位置 mapping update query后 , 以所述 UEl的 Node ID进行 ID/LOC映射查询 , 发现存在该 UE的 Node ID, 将与该 Node ID映射的 LOC更新为当前位置 LOC1 , 返回携带更新 成功的身份标识与位置 mapping update response给 UE;
更新连接的步骤:
步骤 501 , UE1更新与对端 UE2的连接;
UE1发送带有连接参数的消息给 UE2。 所述连接参数中包含以下参数: UE1的新的 LOC1 , 新的 LOC1的生命期、 旧连接的安全参数和新连接的安全 参数。 UE1发送该消息后, 等待来自对端 UE2的确认, 如有必要, 会进行重 发。
UE2收到 UE1发送的消息并验证后, 更新本地连接。 具体地, UE2收到 带有连接参数的消息后, 为了对新的 LOC1进行验证, 会在向 UE1发送的响 应消息中携带响应参数, 并将该响应消息发送到 UE1的 LOC^ UEl接收来 自 UE2的响应消息, 在验证该消息为 UE2发送的消息后, 完成 LOC修改过 程, 并向 UE2返回响应消息 , 所述 UE2收到响应消息后 , 认为 LOC1验证完 成, 将本地连接更新为与新的 LOC1之间的连接。
步骤 601 , 连接更新后通道建立完成, UE1与 UE2使用新的连接通道将 数据封装发送或解封操作。
实现上述方法的系统如图 5所示包括: ILMCF和 UE , 其中:
所述 UE用于在位置发生改变时 ,请求所述 ILMCF更新所述 UE的 Node
ID与 LOC的映射关系; 以及用于更新与通信对端的连接, 建立通道并通信; 所述 ILMCF用于更新所述 UE的 Node ID与 LOC的映射关系。
具体地, 所述 ILMCF包括接收发送模块和映射关系更新模块, 其中: 所述接收发送模块, 用于接收 UE发送的身份标识与位置更新请求(例 如身份标识与位置映射更新查询)或者身份标识与位置注册请求(例如身份 标识与位置映射注册查询) ;
所述映射关系更新模块, 用于在所述接收发送模块接收到 UE发送的身 份标识与位置更新请求后, 将本地保存的与所述 UE身份标识对应的位置更 新为所述 UE的当前位置;以及用于在所述接收发送模块接收到 UE发送的身 份标识与位置注册请求后, 保存所述 UE的身份标识与当前位置的映射关系。 所述 UE包括更新请求模块和连接更新模块, 其中:
所述更新请求模块, 用于在本 UE位置发生改变时, 请求 ILMCF更新所 述 UE的 Node ID与 LOC的映射关系;
所述连接更新模块, 用于在本 UE位置发生改变时, 更新与通信对端的 连接, 建立通道并通信。
UE的更新请求模块在获知本 UE位置发生改变时, 向所述 ILMCF中的 接收发送模块发送身份标识与位置映射请求 (可能是身份标识与位置更新请 求, 或者包括身份标识与位置更新请求和身份标识与位置注册请求) , 所述 ILMCF中的接收发送模块在接收到 UE的请求后, 触发映射关系更新模块更 新所述 UE的身份标识与映射关系 ,所述映射关系更新模块以所述 UE的 Node ID为索引进行查询, 如果存在与所述 Node ID对应的 LOC, 则将该 LOC更 新为所述 UE当前的 LOC, 如果不存在与所述 Node ID对应的 LOC, 则通过 接收发送模块通知所述 UE进行身份标识与位置映射注册, 在所述注册过程 中保存所述 UE的 Node ID与当前 LOC的映射关系。 所述 UE的更新请求模 块优选在获知本 UE位置发生改变时触发所述连接更新模块更新与通信对端 的连接, 或者也可以由所述连接更新模块在获知本 UE位置发生改变时主动 更新与通信对端的连接。
需要说明的是, 如果不冲突, 本发明实施例以及实施例中的各个特征可 以相互结合, 均在本发明的保护范围之内。 另外, 在附图的流程图示出的步 骤可以在诸如一组计算机可执行指令的计算机系统中执行, 并且, 虽然在流 程图中示出了逻辑顺序, 但是在某些情况下, 可以以不同于此处的顺序执行 所示出或描述的步骤。
工业实用性
釆用本发明所述方法、 系统和装置, 可以实现 UE的无缝切换, 保证 UE 移动时通信不中断, 提高用户体验。

Claims

权 利 要 求 书
1、 一种移动切换的实现方法,其特征在于,该方法应用于身份标识与位 置分离网络中, 该方法包括:
通信过程中, 当终端 (UE )位置发生改变, 所述 UE请求身份标识与位 置分离映射控制功能实体( ILMCF )更新所述 UE身份标识( Node ID )与位 置 (LOC ) 的映射关系;
所述 UE更新与通信对端的连接, 建立通道并通信。
2、 如权利要求 1所述的方法, 其中, 所述 UE请求 ILMCF更新其 Node ID与 LOC的映射关系的步骤包括:
所述 UE向 ILMCF发送身份标识与位置映射更新查询, 所述 ILMCF以 所述 UE的 Node ID为索引进行查询,如果存在与所述 Node ID对应的 LOC, 则将该 LOC更新为所述 UE当前的 LOC,如果不存在与所述 Node ID对应的 LOC, 则通知所述 UE进行身份标识与位置映射注册, 在所述注册过程中保 存所述 UE的 Node ID与当前 LOC的映射关系。
3、 如权利要求 2所述的方法, 其中, 所述 UE请求 ILMCF更新其 Node
ID与 LOC的映射关系的步骤还包括:
ILMCF如果判断不存在与所述 Node ID对应的 LOC, 则向所述 UE返回 携带更新失败的身份标识与位置映射更新响应, 所述 UE收到该响应后, 向 所述 ILMCF发送身份标识与位置映射注册查询请求,请求注册 Node ID与当 前 LOC的映射关系, 所述 ILMCF收到请求后, 保存所述 UE的 Node ID与 当前 LOC的映射关系, 返回身份标识与位置映射注册响应给所述 UE。
4、 如权利要求 1所述的方法, 其中, 所述 UE更新与通信对端的连接的 步骤包括:
所述 UE向通信对端发送带有连接参数的消息, 所述连接参数包括所述 UE的当前 LOC, 所述通信对端收到带有连接参数的消息后, 向所述 UE发送 响应消息, 所述 UE接收所述通信对端发送的响应消息后, 在验证该消息为 通信对端发送的消息后, 向所述通信对端返回响应消息, 所述通信对端收到 所述 UE发送的响应消息后,将本地连接更新为与所述 UE当前位置之间的连 接。
5、 如权利要求 4所述的方法, 其中,
所述连接参数还包括当前 LOC的生命期、旧连接的安全参数和新连接的 安全参数。
6、 如权利要求 4所述的方法, 其中, 所述 UE更新与通信对端的连接的 的步骤还包括: 如果发现通信对端的位置发生改变, 通过读取映射服务器, 获取通信对端的当前 LOC, 所述 UE将连接更新为所述 UE当前 LOC与通信 对端当前 LOC之间的连接。
7、 一种移动切换的实现系统,其特征在于,该系统应用于身份标识与位 置分离网络中,该系统包括:身份标识与位置分离映射控制功能实体( ILMCF ) 和终端 (UE ) , 其中:
所述 UE设置为: 在位置发生改变时, 请求所述 ILMCF更新所述 UE的 身份标识(Node ID )与位置(LOC )的映射关系; 以及更新与通信对端的连 接, 建立通道并通信;
所述 ILMCF设置为: 更新所述 UE的 Node ID与 LOC的映射关系。
8、 一种实现移动切换的装置,其特征在于,该装置应用于身份标识与位 置分离网络中, 该装置包括接收发送模块和映射关系更新模块, 其中:
所述接收发送模块设置为: 接收终端(UE )发送的身份标识与位置更新 请求或者身份标识与位置注册请求;
所述映射关系更新模块设置为: 在所述接收发送模块接收到 UE发送的 身份标识与位置更新请求后, 将本地保存的与所述 UE身份标识对应的位置 更新为所述 UE的当前位置;以及在所述接收发送模块接收到 UE发送的身份 标识与位置注册请求后, 保存所述 UE的身份标识与当前位置的映射关系。
9、 一种实现移动切换的终端,其特征在于,该终端应用于身份标识与位 置分离网络中, 该终端包括更新请求模块和连接更新模块, 其中: 所述更新请求模块设置为: 在所述终端位置发生改变时, 请求身份标识 与位置分离映射控制功能实体( ILMCF )更新所述 UE的身份标识( Node ID ) 与位置 (LOC ) 的映射关系;
所述连接更新模块设置为: 在所述终端位置发生改变时, 更新与通信对 端的连接, 建立通道并通信。
10、 如权利要求 9所述的终端, 其中,
所述更新请求模块是设置为: 向 ILMCF发送身份标识与位置更新请求, 以请求所述 ILMCF更新所述终端的 Node ID与 LOC的映射关系, 在接收到 所述 ILMCF返回的更新失败的响应后, 向所述 ILMCF发送身份标识与位置 注册请求, 以请求所述 ILMCF更新所述终端的 Node ID与 LOC的映射关系。
PCT/CN2010/076359 2010-02-26 2010-08-25 移动切换的实现方法、系统和装置 WO2011103744A1 (zh)

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