CN101026874A - Cross-domain heterogeneous network system and adjacent network switching method and device - Google Patents
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Abstract
Description
Translated fromChinese技术领域technical field
本发明涉及通信领域，更具体地，涉及跨域异构网络系统以及相邻网络间切换切换方法和装置。The present invention relates to the communication field, and more specifically, to a cross-domain heterogeneous network system and a handover method and device between adjacent networks.
背景技术Background technique
随着通信技术的迅速发展，新的通信技术和标准层出不穷，通信产业正在经历一个新的发展变革期。在通信网络向着高速化、宽带化、个性化发展的过程中，出现了多种多样的无线通信技术和网络，包括：2G(GSM)、2.5G(GPRS)、3G(UMTS)、WLAN、WiMax、PAN、固网等，这给通信网络带来了丰富的异构性，而异构性也是未来很长一段时间里无线网络环境的主要特征之一。因此，研究异构网络的互通和融合已成为通信领域研究和发展的大趋势。With the rapid development of communication technology, new communication technologies and standards emerge one after another, and the communication industry is experiencing a new period of development and transformation. In the process of communication network developing towards high-speed, broadband and personalization, a variety of wireless communication technologies and networks have emerged, including: 2G (GSM), 2.5G (GPRS), 3G (UMTS), WLAN, WiMax , PAN, fixed network, etc., which brings rich heterogeneity to the communication network, and heterogeneity will also be one of the main characteristics of the wireless network environment for a long time in the future. Therefore, research on the interworking and integration of heterogeneous networks has become a major trend in the research and development of the communication field.
未来融合网络的目标是实现任何人在任何时间、任何地点与任何对象交互任何信息，这就需要对用户的业务进行无缝的支持，因此，如何实现无缝的漫游与切换成为了研究和关注的焦点。根据源和目标网络的位置和管理区域的不同，可以把切换对应的移动性管理分为以下四种类型：The goal of the future converged network is to enable anyone to exchange any information with any object at any time, any place, which requires seamless support for user services. Therefore, how to realize seamless roaming and switching has become a research and concern Focus. According to the location and management area of the source and target networks, the mobility management corresponding to the handover can be divided into the following four types:
垂直宏移动性(Vertical Macromobility)：用户使用不同的无线技术，在不同管理域间移动；Vertical Macromobility: Users use different wireless technologies to move between different management domains;
水平宏移动性(Horizontal Macromobility)：用户使用相同的无线技术，在不同管理域间移动；Horizontal Macromobility: Users use the same wireless technology to move between different management domains;
垂直微移动性(Vertical Micromobility)：用户使用不同无线技术，在相同管理域内移动；Vertical Micromobility: Users use different wireless technologies to move within the same management domain;
水平微移动性(Horizontal Micromobility)：用户使用相同无线技术，在相同管理域内移动；Horizontal Micromobility: Users use the same wireless technology to move within the same management domain;
为了能充分利用不同管理域、不同网络的资源，向用户提供更多、更高质量的业务，必须有跨域的异构网络间的无缝切换方法的支持，这对终端、网络设备提出了不同的需求。目前，业界在该领域所提供的解决方案，存在的一些主要问题有：In order to make full use of resources in different management domains and different networks, and provide users with more and higher-quality services, it is necessary to have the support of a seamless handover method between cross-domain heterogeneous networks, which poses a challenge to terminals and network devices. different needs. At present, the solutions provided by the industry in this field have some main problems:
(1)主要支持终端触发和决策的异构网络间切换技术，缺乏对网络初始化和决策的垂直切换的支持；由于终端无法完整地搜集到网络部分的相关信息，这导致终端触发和判决的切换无法达到最优效果。同时，这类方法还导致终端设计复杂，需要支持多种附加功能和大量运算以提供对垂直切换的触发和决策，节能性差；(1) Handover technology between heterogeneous networks that mainly supports terminal triggering and decision-making, lacks support for vertical handover of network initialization and decision-making; because the terminal cannot completely collect relevant information of the network part, this leads to handover of terminal triggering and decision-making Optimal results cannot be achieved. At the same time, this type of method also leads to complex terminal design, which needs to support multiple additional functions and a large number of calculations to provide triggering and decision-making for vertical switching, and has poor energy saving;
(2)上下文感知功能与重配置功能隔离独立，导致网络初始化和决策过程速度慢效率低；(2) The context-aware function and the reconfiguration function are isolated and independent, resulting in slow network initialization and low efficiency in the decision-making process;
(3)网络中对用户进行切换管理的设备功能定义不够明确；(3) The function definition of the equipment for user switching management in the network is not clear enough;
(4)在终端的设计上，通常采用折中的多模终端，价格昂贵且不具备通用性和扩展性，不能满足用户对无所不在的，各种类型的网络资源应用的需求。(4) In the design of the terminal, a compromised multi-mode terminal is usually used, which is expensive and does not have versatility and scalability, and cannot meet the needs of users for ubiquitous and various types of network resource applications.
发明内容Contents of the invention
本发明实施例的目的在于提供一种跨域异构网络系统以及相邻网络间方法和装置，以实现异构网络间的无缝切换。The purpose of the embodiments of the present invention is to provide a cross-domain heterogeneous network system and a method and device between adjacent networks, so as to realize seamless handover between heterogeneous networks.
在本发明实施例中，提供了一种相邻网络间切换方法，其中，相邻网络包括：用户终端所属的源网络，与源网络邻接的一个或多个目标网络，源网络中的切换管理服务器被配置成服务切换管理服务器，本方法包括：源网络中的上下文感知服务器搜集和处理用户终端的相关上下文信息，根据相关上下文信息产生切换触发事件，其中，相关上下文信息包括源网络的网络信息、目标网络的网络信息、和终端信息；源网络切换管理服务器与被选定切换的目标网络中的切换管理服务器针对切换触发事件进行切换管理；以及用户终端在切换管理之下实现从源网络到目标网络的切换。In an embodiment of the present invention, a handover method between adjacent networks is provided, wherein the adjacent network includes: a source network to which the user terminal belongs, one or more target networks adjacent to the source network, and handover management in the source network The server is configured as a service switching management server, and the method includes: the context-aware server in the source network collects and processes relevant context information of the user terminal, and generates a switching trigger event according to the relevant context information, wherein the relevant context information includes network information of the source network , network information of the target network, and terminal information; the source network handover management server and the handover management server in the selected target network perform handover management for the handover trigger event; and the user terminal realizes switching from the source network to the Switching of the target network.
在上述的相邻网络间切换方法中，上下文感知服务器搜集和处理相关上下文信息，根据相关上下文信息产生切换触发事件具体包括：建立源网络切换管理服务器与用户终端的关联，向上下文感知服务器订阅上下文信息；上下文感知服务器对收集成功的上下文信息进行分类处理，筛选出发生变化的上下文信息，并产生切换触发事件；上下文感知服务器将切换触发事件传送给源网络切换管理服务器。In the above method for handover between adjacent networks, the context-aware server collects and processes relevant context information, and generates a handover trigger event according to the relevant context information, which specifically includes: establishing an association between the source network handover management server and the user terminal, and subscribing context to the context-aware server information; the context-aware server classifies and processes the successfully collected context information, screens out changed context information, and generates a handover trigger event; the context-aware server transmits the handover trigger event to the source network handover management server.
在上述的相邻网络间切换方法中，源网络切换管理服务器与被选定切换的目标网络中的切换管理服务器针对切换触发事件进行切换管理具体包括：源网络切换管理服务器对切换触发事件进行判决，判决用户终端是否需要切换以及应该切换到哪一个目标网络；被选定切换的目标网络的切换管理服务器对切换触发事件判断是否可以提供与源网络相同的连续业务，如果可以，则将目标网络切换服务器配置为服务切换管理服务器；否则将目标网络切换服务器配置为代理切换管理服务器；目标网络切换管理服务器通知用户终端需要重新配置哪些资源。In the above handover method between adjacent networks, the handover management server in the source network handover management server and the handover management server in the target network selected for handover specifically includes: the source network handover management server judges the handover trigger event , to determine whether the user terminal needs to be handed over and which target network it should be handed over to; the handover management server of the selected handover target network judges whether the handover trigger event can provide the same continuous service as that of the source network, and if so, the target network The switching server is configured as a service switching management server; otherwise, the target network switching server is configured as an agent switching management server; the target network switching management server notifies the user terminal which resources need to be reconfigured.
在上述的相邻网络间切换方法中，用户终端在切换管理之下实现从源网络到目标网络的切换具体包括：用户终端按照通知来重新配置资源，如果用户终端已经存储了重配置资源，则对用户终端直接进行重新配置，否则用户终端从数据库获取重配置资源来进行重新配置。In the aforementioned handover method between adjacent networks, the handover of the user terminal from the source network to the target network under handover management specifically includes: the user terminal reconfigures resources according to the notification, and if the user terminal has stored the reconfigured resources, then The user terminal is directly reconfigured, otherwise the user terminal acquires reconfiguration resources from the database to perform reconfiguration.
在上述的相邻网络间切换方法中，数据库包括以下至少之一：本地数据库、邻接网络数据库、或受信的第三方数据库。In the above handover method between adjacent networks, the database includes at least one of the following: a local database, an adjacent network database, or a trusted third-party database.
在上述的相邻网络间切换方法中，当将切换服务器配置为服务切换管理服务器时，相邻网络间切换方法还包括：进行切换，服务切换管理服务器建立与用户终端的通信链路；为用户终端注册，订阅上下文信息；以及源网络切换管理服务器释放重配置资源，通过目标网络为用户终端提供连续服务。In the aforementioned handover method between adjacent networks, when the handover server is configured as a service handover management server, the handover method between adjacent networks further includes: performing handover, and the service handover management server establishes a communication link with the user terminal; The terminal registers and subscribes to the context information; and the source network switching management server releases the reconfiguration resources to provide continuous services for the user terminal through the target network.
在上述的相邻网络间切换方法中，当将切换服务器配置为代理切换管理服务器时，相邻网络间切换方法还包括：保留源网络相关的资源，通过代理服务切换管理服务器建立与用户终端的通信链路；为用户终端注册，收集上下文信息；以及代理切换管理服务器转发服务切换管理服务器与终端间的数据包，并释放源网络与用户终端间的资源。In the aforementioned handover method between adjacent networks, when the handover server is configured as a proxy handover management server, the handover method between adjacent networks further includes: reserving resources related to the source network, and establishing a relationship with the user terminal through the handover management server through the proxy service A communication link; registering for the user terminal, collecting context information; and forwarding the data packet between the service switching management server and the terminal by the proxy switching management server, and releasing resources between the source network and the user terminal.
在上述的相邻网络间切换方法中，上下文信息还包括以下至少之一：用户喜好、相关档案、用户的历史纪录、和应用信息。In the above method for switching between adjacent networks, the context information further includes at least one of the following: user preferences, related files, user history records, and application information.
在上述的相邻网络间切换方法中，还包括：用户终端采用自学习的方法，根据用户的设置以及软件使用频率策略，将常用的或用户设定的资源进行存储。The above method for switching between adjacent networks further includes: the user terminal adopts a self-learning method to store commonly used or user-set resources according to user settings and software usage frequency policies.
在上述的相邻网络间切换方法中，所述相邻网络间是跨域异构关系，所述切换是跨域异构网络间的垂直切换。In the above handover method between adjacent networks, the adjacent networks are in a cross-domain heterogeneous relationship, and the handover is a vertical handover between cross-domain heterogeneous networks.
在本发明实施例中，还提供了一种相邻网络间切换装置，其中，相邻网络包括：用户终端所属的源网络，与源网络邻接的一个或多个目标网络，源网络切换管理服务器被配置成服务切换管理服务器，相邻网络间切换装置包括：切换触发模块，用于指令源网络中的上下文感知服务器搜集和处理用户终端的相关上下文信息，根据相关上下文信息产生切换触发事件，其中，相关上下文信息包括源网络的网络信息、目标网络的网络信息、和终端信息；切换管理模块，用于指令源网络切换管理服务器与被选定切换的目标网络中的切换管理服务器针对切换触发事件进行切换管理；以及切换模块，用于指令用户终端在切换管理之下实现从源网络到目标网络的切换。In an embodiment of the present invention, an apparatus for handover between adjacent networks is also provided, wherein the adjacent network includes: a source network to which the user terminal belongs, one or more target networks adjacent to the source network, and a source network handover management server Configured as a service handover management server, the handover device between adjacent networks includes: a handover trigger module, configured to instruct a context-aware server in the source network to collect and process relevant context information of the user terminal, and generate a handover trigger event according to the relevant context information, wherein , the relevant context information includes the network information of the source network, the network information of the target network, and the terminal information; the handover management module is used to instruct the handover management server in the source network and the handover management server in the selected target network to trigger the handover event performing handover management; and a handover module, configured to instruct the user terminal to implement handover from the source network to the target network under the handover management.
在本发明实施例中，还提供了一种跨域异构网络系统，包括跨域异构的源网络和目标网络，分别用于向用户终端提供服务，源网络包括：切换管理服务器，其与用户终端建立有关联，被配置成服务切换管理服务器；上下文感知服务器，用于搜集和处理用户终端的相关上下文信息、产生切换触发事件，其中，上下文信息包括网络信息、终端信息、和链路信息；目标网络包括切换管理服务器，用于与源网络的切换管理服务器针对切换触发事件进行切换管理，以将用户终端从源网络垂直切换到目标网络。In an embodiment of the present invention, a cross-domain heterogeneous network system is also provided, including a cross-domain heterogeneous source network and a target network, which are respectively used to provide services to user terminals. The source network includes: a handover management server, which communicates with The user terminal establishes an association and is configured as a service switching management server; a context-aware server is used to collect and process relevant context information of the user terminal and generate switching trigger events, wherein the context information includes network information, terminal information, and link information ; The target network includes a handover management server for performing handover management with the handover management server of the source network for handover triggering events, so as to vertically handover the user terminal from the source network to the target network.
具体来说，本发明提出的相邻网络间切换方法和装置以及跨域异构网络系统具有以下技术效果：Specifically, the handover method and device between adjacent networks and the cross-domain heterogeneous network system proposed by the present invention have the following technical effects:
(1)在网络中利用上下文感知服务器来搜集和管理相关上下文信息、产生切换触发事件；由于在网络中采用了功能强大的上下文感知服务器，因此可以更多地搜集切换相关的上下文信息，并进行更好的分类处理，产生切换触发事件；同时，由于在该方案中，终端只是起辅助作用，只需上报终端和相关链路信息，因此，可以显著节省功耗；此外，还可以简化终端在切换方面的设计和处理，使设备制造者转而开发更多用户关心的、功能强大的应用功能。(1) Use context-aware servers in the network to collect and manage relevant context information and generate handover trigger events; because a powerful context-aware server is used in the network, more context information related to handover can be collected and performed. Better classification processing can generate handover trigger events; at the same time, because in this scheme, the terminal only plays an auxiliary role and only needs to report the terminal and related link information, it can significantly save power consumption; in addition, it can also simplify the terminal in the The design and handling of handover enables device manufacturers to develop more powerful application functions that users care about.
(2)在网络中采用了切换管理服务器，对切换相关处理进行统一的处理和控制；在网络中采用专门的切换管理服务器，可以根据不同处理需要分别配置为服务和代理两种模式，便于对切换相关操作进行统一、集中的处理：可以利用其强大的计算、处理、存储功能，存储更丰富的策略，融入用户的喜好，提供更大的灵活性；同时，完成与上下文管理服务器间的交互，依据策略和相关切换触发事件、信息，提供优化的切换判决。此外，该服务器还可以通过预先与目标网络建立链路连接，完成相关切换前操作的方法，显著缩短了切换时延。(2) A handover management server is used in the network to perform unified processing and control on handover-related processing; a dedicated handover management server is used in the network, which can be configured in service and agent modes according to different processing needs, which is convenient for Switch related operations for unified and centralized processing: it can use its powerful computing, processing, and storage functions to store more abundant policies, integrate user preferences, and provide greater flexibility; at the same time, complete the interaction with the context management server , according to the policy and related handover trigger events and information, provide optimized handover judgment. In addition, the server can also significantly shorten the handover delay by establishing a link connection with the target network in advance and completing relevant pre-handover operations.
(3)终端设备为可重配置终端，具有极大的灵活性和扩展性，可以在保持用户通话及各种业务连续性的前提下，通过从软件数据库中进行软件或协议栈下载的方式进行重配置，以提供给用户跨域的异构网络间移动性的支持，弥补了现有多模终端灵活性不足的缺点，同时，较大地降低了终端成本。此外，该终端还可采用自学习的方法，根据用户的设置以及应用频率等策略，在数据库中存储常用的RAT协议栈及相应软件，使用户不必频繁的重复下载同样的资源，进来避免了资源的浪费。(3) The terminal equipment is a reconfigurable terminal, which has great flexibility and expansibility. It can be downloaded from the software database by downloading software or protocol stacks under the premise of maintaining user calls and various business continuity. Reconfiguration is used to provide users with mobility support between cross-domain heterogeneous networks, which makes up for the lack of flexibility of existing multi-mode terminals, and at the same time greatly reduces terminal costs. In addition, the terminal can also use the self-learning method to store commonly used RAT protocol stacks and corresponding software in the database according to user settings and application frequency strategies, so that users do not have to download the same resources frequently and repeatedly. waste.
(4)在支持网络触发和判决，加入网络策略和用户喜好，优化的垂直切换方法的同时，可以兼容地支持终端触发和判决的切换方法，具有很好的通用性、可扩展性和移植性。(4) While supporting network triggering and judgment, adding network policies and user preferences, and optimizing the vertical handover method, it can also compatiblely support the handover method of terminal triggering and judgment, which has good versatility, scalability and portability .
值得注意，因为跨域异构网络是最复杂的相邻网络关系，所以下面实施例中所描述的切换方法既然能够适用于跨域异构网络，那么当然还可以适用于其他的相邻网络，例如适用于非跨域非异构、跨域非异构、非跨域异构等多种相邻网络。It is worth noting that since the cross-domain heterogeneous network is the most complex adjacent network relationship, since the handover method described in the following embodiments can be applied to the cross-domain heterogeneous network, it can also be applied to other adjacent networks. For example, it is applicable to various adjacent networks such as non-cross-domain non-heterogeneous, cross-domain non-heterogeneous, and non-cross-domain heterogeneous.
本发明的其它特征和优点将在随后的说明书中阐述，并且，部分地从说明书中变得显而易见，或者通过实施本发明而了解。本发明的目的和其他优点可通过在所写的说明书、权利要求书、以及附图中所特别指出的结构来实现和获得。Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
附图说明Description of drawings
此处所说明的附图用来提供对本发明的进一步理解，构成本申请的一部分，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：The accompanying drawings described here are used to provide a further understanding of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention. In the attached picture:
图1是根据本发明实施例的相邻网络间切换方法的流程图；FIG. 1 is a flowchart of a method for switching between adjacent networks according to an embodiment of the present invention;
图2是根据本发明实施例的切换操作示意图；FIG. 2 is a schematic diagram of a handover operation according to an embodiment of the present invention;
图3是根据本发明实施例的实现切换的流程图；Fig. 3 is a flow chart of implementing switching according to an embodiment of the present invention;
图4是根据本发明实施例的切换前操作流程图；FIG. 4 is a flow chart of pre-handover operations according to an embodiment of the present invention;
图5是根据本发明实施例的切换中操作流程图；FIG. 5 is a flowchart of an operation during switching according to an embodiment of the present invention;
图6是根据本发明实施例的目标切换管理服务器配置为服务切换管理服务器时的切换后操作流程图；以及6 is a flow chart of post-handover operations when the target handover management server is configured as a service handover management server according to an embodiment of the present invention; and
图7是根据本发明实施例的相邻网络间切换装置的框图。Fig. 7 is a block diagram of an apparatus for switching between adjacent networks according to an embodiment of the present invention.
具体实施方式Detailed ways
以下结合附图对本发明的优选实施例进行说明，应当理解，此处所描述的优选实施例仅用于说明和解释本发明，并不用于限定本发明。The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
本发明提供了一种跨域异构网络系统，包括跨域异构的源网络和目标网络，分别用于向用户终端提供服务，源网络包括：切换管理服务器，其与用户终端建立有关联，被配置成服务切换管理服务器；上下文感知服务器，用于搜集和处理用户终端的相关上下文信息、产生切换触发事件，其中，上下文信息包括网络信息、终端信息、和链路信息；目标网络包括切换管理服务器，用于针对切换触发事件进行切换管理，以在切换管理之下实现用户终端在跨域异构网络间(即，从源网络到目标网络)的垂直切换。The present invention provides a cross-domain heterogeneous network system, including a cross-domain heterogeneous source network and a target network, which are respectively used to provide services to user terminals. The source network includes: a handover management server, which is associated with the user terminal, It is configured as a service switching management server; a context-aware server is used to collect and process relevant context information of user terminals and generate switching trigger events, wherein the context information includes network information, terminal information, and link information; the target network includes switching management The server is configured to perform handover management for the handover triggering event, so as to realize the vertical handover of the user terminal between cross-domain heterogeneous networks (ie, from the source network to the target network) under the handover management.
图1是根据本发明实施例的用相邻网络间切换方法的流程图。本发明中数据库可包括以下至少之一：本地数据库、邻接网络数据库、或受信的第三方数据库；重配置资源可包括相应软件和/或协议栈；协议栈可包括无线接入协议栈。Fig. 1 is a flowchart of a method for switching between adjacent networks according to an embodiment of the present invention. In the present invention, the database may include at least one of the following: a local database, an adjacent network database, or a trusted third-party database; the reconfiguration resource may include corresponding software and/or protocol stack; the protocol stack may include a wireless access protocol stack.
如图1所示，该切换方法包括以下步骤：As shown in Figure 1, the switching method includes the following steps:
步骤S102，源网络中的上下文感知服务器搜集和处理用户终端的相关上下文信息，根据相关上下文信息产生切换触发事件，其中，相关上下文信息包括源网络的网络信息、目标网络的网络信息、和终端信息；Step S102, the context-aware server in the source network collects and processes relevant context information of the user terminal, and generates a handover trigger event according to the relevant context information, wherein the relevant context information includes network information of the source network, network information of the target network, and terminal information ;
步骤S104，源网络切换管理服务器与被选定切换的目标网络中的切换管理服务器针对切换触发事件进行切换管理；以及Step S104, the source network handover management server and the handover management server in the selected target network perform handover management for the handover trigger event; and
步骤S106，用户终端在切换管理之下实现跨域异构网络间的垂直切换。In step S106, the user terminal implements vertical handover between cross-domain heterogeneous networks under handover management.
上下文感知服务器搜集和处理相关上下文信息，产生切换触发事件可包括以下步骤：建立源网络切换管理服务器与用户终端的关联，向上下文感知服务器订阅上下文信息；上下文感知服务器对收集成功的上下文信息进行分类处理，筛选出发生变化的上下文信息，并产生切换触发事件；上下文感知服务器将切换触发事件传送给源网络切换管理服务器。The context-aware server collects and processes relevant context information, and generating a handover trigger event may include the following steps: establishing an association between the source network handover management server and the user terminal, and subscribing context information to the context-aware server; the context-aware server classifies the successfully collected context information process, filter out the changed context information, and generate a handover trigger event; the context awareness server transmits the handover trigger event to the source network handover management server.
进行切换管理可包括以下步骤：源网络切换管理服务器对切换触发事件进行判决，判决用户终端是否需要切换以及应该切换到哪一个目标网络；被选定切换的目标网络的切换管理服务器对切换触发事件判断是否可以提供与源网络相同的连续业务，如果可以，则将目标网络切换服务器配置为服务切换管理服务器；否则将目标网络切换服务器配置为代理切换管理服务器；目标网络切换管理服务器通知用户终端需要重新配置哪些资源。Handover management may include the following steps: the source network handover management server judges the handover trigger event, and judges whether the user terminal needs to handover and which target network should be handed over; the handover management server of the selected handover target network checks the handover trigger event Determine whether the same continuous service as the source network can be provided, and if so, configure the target network switching server as a service switching management server; otherwise, configure the target network switching server as an agent switching management server; the target network switching management server notifies the user terminal that it needs to Which resources to reconfigure.
用户终端在所述切换管理之下实现从所述源网络到所述目标网络的切换可包括以下步骤：用户终端按照通知来重新配置资源，如果用户终端已经存储了重配置资源，则对用户终端直接进行重新配置，否则用户终端从数据库获取重配置资源来进行重新配置。The handover of the user terminal from the source network to the target network under the handover management may include the following steps: the user terminal reconfigures resources according to the notification, and if the user terminal has stored the reconfiguration resources, the user terminal Perform reconfiguration directly, otherwise, the user terminal obtains reconfiguration resources from the database to perform reconfiguration.
当将切换服务器配置为服务切换管理服务器时，可包括以下步骤：进行切换，服务切换管理服务器建立与用户终端的通信链路；为用户终端注册，订阅上下文信息；以及源网络切换管理服务器释放重配置资源，通过目标网络为用户终端提供连续服务。When the switching server is configured as a service switching management server, the following steps may be included: switching, the service switching management server establishes a communication link with the user terminal; registering for the user terminal, subscribing to context information; Configure resources to provide continuous services to user terminals through the target network.
当将切换服务器配置为代理切换管理服务器时，可包括以下步骤：保留源网络相关的资源，通过代理服务切换管理服务器建立与用户终端的通信链路；为用户终端注册，收集上下文信息；以及代理切换管理服务器转发服务切换管理服务器与终端间的数据包，并释放源网络与用户终端间的资源。When the switching server is configured as a proxy switching management server, the following steps may be included: reserve resources related to the source network, establish a communication link with the user terminal through the proxy service switching management server; register for the user terminal, collect context information; and proxy The handover management server forwards the data packet between the handover management server and the terminal, and releases resources between the source network and the user terminal.
优选地，上下文信息还可包括以下至少之一：用户喜好和相关档案、用户的历史纪录、和应用信息。Preferably, the context information may further include at least one of the following: user preferences and related files, user history records, and application information.
优选地，用户终端采用自学习的方法，根据用户的设置以及软件使用频率策略，将常用的或用户设定的资源进行存储。Preferably, the user terminal adopts a self-learning method to store commonly used or user-set resources according to user settings and software usage frequency policies.
所述相邻网络间可以是跨域异构关系，所述切换可以是跨域异构网络间的垂直切换。但显然，因为跨域异构网络是最复杂的相邻网络关系，所以下面实施例中所描述的切换方法既然能够适用于跨域异构网络，那么当然还可以适用于其他的相邻网络，例如适用于非跨域非异构、跨域非异构、非跨域异构等多种相邻网络。The adjacent networks may have a cross-domain heterogeneous relationship, and the handover may be a vertical handover between the cross-domain heterogeneous networks. But obviously, since the cross-domain heterogeneous network is the most complex adjacent network relationship, since the switching method described in the following embodiments can be applied to the cross-domain heterogeneous network, it can also be applied to other adjacent networks. For example, it is applicable to various adjacent networks such as non-cross-domain non-heterogeneous, cross-domain non-heterogeneous, and non-cross-domain heterogeneous.
上述的方法中，终端设备为可重配置终端，具有极大的灵活性和扩展性，可以在保持用户通话及各种业务连续性的前提下，通过从软件数据库中进行软件或协议栈下载的方式进行重配置，以提供给用户跨域的异构网络间移动性的支持，弥补了现有多模终端灵活性不足的缺点，同时，较大地降低了终端成本。此外，该终端还可采用自学习的方法，根据用户的设置以及应用频率等策略，在数据库中存储常用的RAT协议栈及相应软件，使用户不必频繁的重复下载同样的资源，进来避免了资源的浪费。另外，在支持网络触发和判决，加入网络策略和用户喜好，优化的垂直切换方法的同时，上述的方法可以兼容地支持终端触发和判决的切换方法，具有很好的通用性、可扩展性和移植性。In the above method, the terminal device is a reconfigurable terminal, which has great flexibility and scalability, and can download software or protocol stacks from the software database under the premise of maintaining user calls and various business continuity. Reconfiguration is carried out in a manner to provide users with mobility support between heterogeneous networks across domains, which makes up for the lack of flexibility of existing multi-mode terminals, and at the same time greatly reduces terminal costs. In addition, the terminal can also use the self-learning method to store commonly used RAT protocol stacks and corresponding software in the database according to user settings and application frequency strategies, so that users do not have to download the same resources frequently and repeatedly. waste. In addition, while supporting network triggering and judgment, adding network policies and user preferences, and optimizing the vertical handover method, the above-mentioned method can compatiblely support the handover method of terminal triggering and judgment, and has good versatility, scalability and portability.
图2是根据本发明的实施例的切换操作示意图。如图2所示，假设用户正在使用网络中的一种应用服务，但由于位置、服务质量(QoS)需求或其它环境、条件变化产生了切换的可能性(在本发明的实施例中，以位置变化为例)，则产生以下切换操作步骤：Fig. 2 is a schematic diagram of switching operation according to an embodiment of the present invention. As shown in Figure 2, it is assumed that the user is using an application service in the network, but due to location, quality of service (QoS) requirements or other environment, the possibility of switching occurs due to changes in conditions (in the embodiments of the present invention, with position change as an example), the following switching operation steps are generated:
1.用户入网注册后，网络为用户指派服务的HOMS，并向CS完成信息订阅；1. After the user registers on the network, the network assigns the HOMS of the service to the user, and completes the information subscription to the CS;
2.CS通过终端、本网和邻接网络获取并处理上下文信息，并产生感知触发事件；2. The CS acquires and processes context information through the terminal, local network and adjacent networks, and generates perception trigger events;
3.在用户向目标网络移动的情况下，HOMS根据触发事件作出切换判决，选定目标网络，并在保持现有连接不间断的情况下，与目标网络HOMS建立连接，完成用户注册、认证以及权鉴；3. When the user moves to the target network, HOMS makes a switching decision according to the trigger event, selects the target network, and establishes a connection with the target network HOMS while maintaining the existing connection uninterrupted, and completes user registration, authentication and Authorization certificate;
4.根据获得的用户信息，从软件服务器(SR)向用户下载需要的软件或者协议栈；以及4. According to the obtained user information, download the required software or protocol stack from the software server (SR) to the user; and
最后，相同操作的步骤5和步骤6：用户完成到目标网络的新链路的建立以及在目标网络CS中的信息的订阅。Finally, step 5 and step 6 of the same operation: the user completes the establishment of a new link to the target network and the subscription of information in the target network CS.
图3是根据本发明的实施例的实现切换的流程图，，包括以下步骤：Fig. 3 is a flow chart of implementing switching according to an embodiment of the present invention, including the following steps:
步骤S302，新用户入网注册后建立MT与S-HOMS关联；Step S302, the new user establishes association between MT and S-HOMS after network registration;
步骤S304，S-HOMS与CS交互，获取相关上下文信息；Step S304, the S-HOMS interacts with the CS to obtain relevant context information;
步骤S306，根据上下文信息进行切换判决，如果判断不需要切换，则回到步骤S304；Step S306, making a handover decision according to the context information, and returning to step S304 if it is judged that handover is not required;
步骤S308，当判断需要切换时，成功切换到目标网络；以及Step S308, when it is judged that handover is required, successfully handover to the target network; and
步骤S310，执行切换后操作。Step S310, perform post-handover operations.
图4是根据本发明的实施例的切换前操作流程图。图5是根据本发明的实施例的切换中操作流程图。图6是根据本发明的实施例的目标切换管理服务器配置为服务切换管理服务器时的切换后操作流程图。以下将参考图4-6详细描述如图3所示的具体切换操作过程。FIG. 4 is a flowchart of pre-handover operations according to an embodiment of the present invention. FIG. 5 is a flowchart of operations during handover according to an embodiment of the present invention. Fig. 6 is a flow chart of post-handover operations when the target handover management server is configured as a service handover management server according to an embodiment of the present invention. The specific switching operation process shown in FIG. 3 will be described in detail below with reference to FIGS. 4-6 .
根据本发明的实施例，切换实现主要的处理步骤包括如下文所述的切换前操作、切换中操作、切换后操作。According to the embodiment of the present invention, the main processing steps for implementing the handover include operations before the handover, operations during the handover, and operations after the handover as described below.
一.切换前操作1. Operation before switching
如图4所示的切换前操作又包括了上下文信息订阅，信息收集处理、产生切换触发事件，信息交互，做出切换判决几个子步骤，具体如下：The pre-handover operation shown in Figure 4 includes sub-steps of context information subscription, information collection and processing, generation of handover trigger events, information interaction, and handover judgment, as follows:
(A)上下文信息订阅：(A) Context information subscription:
用户第一次在归属域网络中完成注册后，网络将建立HOMS与用户MT间的关联，将根据网络策略和用户的喜好、设置等，向CS订阅相关的上下文信息。其中：After the user completes the registration in the home domain network for the first time, the network will establish the association between the HOMS and the user MT, and will subscribe to the relevant context information to the CS according to the network policy and the user's preferences and settings. in:
1.根据网络策略订阅的上下文信息是CS需要收集的，切换操作必须的一些信息，该类信息类型很少变化，除非运营商改变网络策略，该类信息为默认订阅信息，主要包括：1. The context information subscribed according to the network policy is what the CS needs to collect and is necessary for switching operations. This type of information rarely changes unless the operator changes the network policy. This type of information is the default subscription information, mainly including:
(a)网络信息：邻接网络拓扑、网络参数(类型、可用性、性能、负载感知等)、所属运营商等；(a) Network information: adjacent network topology, network parameters (type, availability, performance, load perception, etc.), operators, etc.;
(b)终端信息：终端类型、能力、位置等；以及(b) terminal information: terminal type, capability, location, etc.; and
(c)链路信息：链路信号强度等，可由终端上报；(c) Link information: link signal strength, etc., which can be reported by the terminal;
2.根据用户设置、喜好等订阅的上下文信息，是CS收集用来辅助、优化切换操作的，CS能根据用户不同的需求动态地调整需要收集的信息种类。该类信息为可订阅发信息。主要包括：2. The context information subscribed according to user settings, preferences, etc. is collected by CS to assist and optimize switching operations. CS can dynamically adjust the types of information to be collected according to different needs of users. This type of information can be subscribed to send information. mainly include:
(a)用户喜好和相关Profile(档案)；(a) User preferences and related Profiles;
(b)用户的历史纪录，包括网络使用记录、应用服务记录等；以及(b) User's historical records, including network usage records, application service records, etc.; and
(c)应用信息，包括正在进行的业务，与服务相关的QoS等。(c) Application information, including ongoing business, QoS related to the service, etc.
(B)信息收集处理、切换触发事件产生：(B) Information collection and processing, switching trigger event generation:
CS通过终端上报、本网查询、网间信息采集(与邻接网络CS交互)等多种方式，完成对各种订阅的信息的收集，同时对其进行分类处理，筛选出发生变化的上下文信息，并根据预定义的策略，产生切换触发事件。产生的触发事件根据与a)中对不同订阅信息的分类，又可以划分为默认触发时间和订阅触发事件两大类，分别对应变化了的默认订阅信息和可选订阅信息。The CS completes the collection of various subscribed information through various methods such as terminal reporting, local network query, and inter-network information collection (interaction with the adjacent network CS), and at the same time classifies and processes it to filter out the changed context information. And according to a predefined strategy, a switching trigger event is generated. According to the classification of different subscription information in a), the generated trigger events can be divided into two categories: default trigger time and subscription trigger events, corresponding to changed default subscription information and optional subscription information respectively.
(C)信息交互，做出切换判决：(C) information interaction, making a switching decision:
CS将切换触发事件通过与HOMS的接口，传给HOMS，HOMS根据预定义的切换判决算法，对触发事件做出评估和判决，决定是否需要进行切换，如果需要，还将根据CS提供的辅助信息，进行最佳目标网络的选择。The CS transmits the handover trigger event to the HOMS through the interface with the HOMS. The HOMS evaluates and judges the trigger event according to the predefined handover decision algorithm, and decides whether handover is required. If necessary, it will also use the auxiliary information provided by the CS. , to select the best target network.
二.切换中操作2. Switching operation
如图5所示的切换中操作包括了与目标网络建立新的通信链路，终端的预注册、目标网络HOMS功能配置、相应软件、协议栈下载，终端重配置等操作，具体如下：The switching operation shown in Figure 5 includes establishing a new communication link with the target network, terminal pre-registration, target network HOMS function configuration, corresponding software, protocol stack download, terminal reconfiguration and other operations, as follows:
(A)新通信链路的建立：(A) Establishment of a new communication link:
HOMS在选定了目标网络后，将发起与目标网络中对等的HOMS建立通信链路的请求，待目标网络返回确认消息后，开始进行必要的信息交互，同时，保持原网络的连接仍然连续，保证用户的通话连续性；After the HOMS selects the target network, it will initiate a request to establish a communication link with the peer HOMS in the target network. After the target network returns a confirmation message, it will start to exchange necessary information. At the same time, the connection of the original network will remain continuous. , to ensure the user's call continuity;
(B)终端预注册：(B) Terminal pre-registration:
通过新建立的通信链路，源HOMS可将用户相关信息和注册请求，经目标HOMS发送到目标网络中，提前完成用户在目标网络中的注册、认证和鉴权等基本操作。Through the newly established communication link, the source HOMS can send user-related information and registration requests to the target network through the target HOMS, and complete basic operations such as user registration, authentication and authentication in the target network in advance.
(C)目标网络HOMS功能配置：(C) Target network HOMS function configuration:
在进行切换操作时，目标网络HOMS可根据获得的用户和业务信息，判断是否能为用户提供与源网络相同的连续业务，如果可以，则可将目标网络HOMS配置为S-HOMS，进行控制面切换；否则，将HOMS配置为P-HOMS，执行代理功能；During the handover operation, the target network HOMS can judge whether it can provide the same continuous service as the source network for the user according to the obtained user and service information. If yes, the target network HOMS can be configured as S-HOMS for switch; otherwise, configure the HOMS as a P-HOMS and perform the proxy function;
(D)相应软件、协议栈下载：(D) Corresponding software and protocol stack download:
根据相关用户信息，判断用户终端是否需要进行软件、协议栈等的重配置；如果需要，则可通过本地数据库、邻接网络数据库或受信的第三方数据库下载方式，向MT下载相应软件、协议栈。如果用户终端已经存储了相关软件，可以跳过该步骤，直接对其进行配置。According to the relevant user information, determine whether the user terminal needs to reconfigure the software, protocol stack, etc.; if necessary, download the corresponding software and protocol stack to the MT through the local database, adjacent network database or trusted third-party database download method. If the relevant software has been stored in the user terminal, this step can be skipped and it can be configured directly.
(E)终端重配置操作：(E) Terminal reconfiguration operation:
终端对下载的软件进行完整性、可用性等检查后，将对其进行安装配置，同时记录下新软件和协议栈使用的次数和频率，根据设置将需要的软件进行存储，避免重复下载浪费资源。After the terminal checks the integrity and availability of the downloaded software, it will install and configure it, and record the number and frequency of use of the new software and protocol stack, and store the required software according to the settings to avoid repeated downloads and waste of resources.
三.切换后操作3. Operation after switching
切换后操作主要是根据目标HOMS的不同配置(S-HOMS或P-HOMS)执行相应操作：The operation after switching is mainly to perform corresponding operations according to different configurations of the target HOMS (S-HOMS or P-HOMS):
(A)如图6所示，目标HOMS被配置为S-HOMS情况下：(A) As shown in Figure 6, when the target HOMS is configured as S-HOMS:
1.将目标HOMS配置情况通知源网络及MT，并进行控制面的切换；1. Notify the source network and MT of the configuration of the target HOMS, and switch the control plane;
2.通过目标网络建立与MT的新通信链路；2. Establish a new communication link with MT through the target network;
3.在目标网络CS中为用户注册，并根据网络策略和用户需求，订阅相关上下文信息；(具体订阅及处理操作见切换前操作部分)3. Register the user in the target network CS, and subscribe to relevant context information according to the network policy and user needs; (see the pre-switching operation section for specific subscription and processing operations)
4.通知源网络HOMS释放相关资源，包括释放相应链路资源以及CS中存储空间等，直接通过目标网络为用户提供连续业务；4. Notify the source network HOMS to release relevant resources, including releasing corresponding link resources and storage space in CS, etc., and provide continuous services to users directly through the target network;
(B)目标HOMS被配置为P-HOMS情况下：(B) When the target HOMS is configured as P-HOMS:
1.通知源网络及MT，目标HOMS配置情况，同时保留源网络相关资源；1. Notify the source network and MT, the configuration of the target HOMS, while retaining the relevant resources of the source network;
2.S-HOMS通过P-HOMS及目标网络建立与MT的链路；2. S-HOMS establishes a link with MT through P-HOMS and target network;
3.在目标网络CS中为用户进行注册，收集用户在目标网络中相关信息；3. Register the user in the target network CS, and collect relevant information of the user in the target network;
4.P-HOMS作为代理，转发S-HOMS与MT间的数据包，并释放源网络与终端间通信信道资源。4. P-HOMS acts as a proxy, forwarding data packets between S-HOMS and MT, and releases communication channel resources between the source network and the terminal.
图7是用于根据本发明的相邻网络间切换装置700的框图，其包括：FIG. 7 is a block diagram of an apparatus 700 for switching between adjacent networks according to the present invention, which includes:
切换触发模块702，用于指令源网络中的上下文感知服务器搜集和处理用户终端的相关上下文信息，根据相关上下文信息产生切换触发事件，其中，相关上下文信息包括源网络的网络信息、目标网络的网络信息、和终端信息；The
切换管理模块704，用于指令源网络切换管理服务器与被选定切换的目标网络中的切换管理服务器针对切换触发事件进行切换管理；A
切换模块706，用于指令用户终端在切换管理之下实现从源网络到目标网络的切换。A
具体来说，本发明的实施例当用于跨域异构网络间的垂直切换时，具有以下技术效果：Specifically, when the embodiments of the present invention are used for vertical handover between cross-domain heterogeneous networks, they have the following technical effects:
(1)在网络中利用上下文感知服务器来搜集和管理相关上下文信息、产生切换触发事件；由于在网络中采用了功能强大的上下文感知服务器，因此可以更多地搜集切换相关的上下文信息，并进行更好的分类处理，产生切换触发事件；同时，由于在该方案中，终端只是起辅助作用，只需上报终端和相关链路信息，因此，可以显著节省功耗；此外，还可以简化终端在切换方面的设计和处理，使设备制造者转而开发更多用户关心的、功能强大的应用功能。(1) Use context-aware servers in the network to collect and manage relevant context information and generate handover trigger events; because a powerful context-aware server is used in the network, more context information related to handover can be collected and performed. Better classification processing can generate handover trigger events; at the same time, because in this scheme, the terminal only plays an auxiliary role and only needs to report the terminal and related link information, it can significantly save power consumption; in addition, it can also simplify the terminal in the The design and handling of handover enables device manufacturers to develop more powerful application functions that users care about.
(2)在网络中采用了切换管理服务器，对切换相关处理进行统一的处理和控制；在网络中采用专门的切换管理服务器，可以根据不同处理需要分别配置为服务和代理两种模式，便于对切换相关操作进行统一、集中的处理：可以利用其强大的计算、处理、存储功能，存储更丰富的策略，融入用户的喜好，提供更大的灵活性；同时，完成与上下文管理服务器间的交互，依据策略和相关切换触发事件、信息，提供优化的切换判决。此外，该服务器还可以通过预先与目标网络建立链路连接，完成相关切换前操作的方法，显著缩短了切换时延。(2) A handover management server is used in the network to perform unified processing and control on handover-related processing; a dedicated handover management server is used in the network, which can be configured in service and agent modes according to different processing needs, which is convenient for Switch related operations for unified and centralized processing: it can use its powerful computing, processing, and storage functions to store more abundant policies, integrate user preferences, and provide greater flexibility; at the same time, complete the interaction with the context management server , according to the policy and related handover trigger events and information, provide optimized handover judgment. In addition, the server can also significantly shorten the handover delay by establishing a link connection with the target network in advance and completing relevant pre-handover operations.
(3)终端设备为可重配置终端，具有极大的灵活性和扩展性，可以在保持用户通话及各种业务连续性的前提下，通过从软件数据库中进行软件或协议栈下载的方式进行重配置，以提供给用户跨域的异构网络间移动性的支持，弥补了现有多模终端灵活性不足的缺点，同时，较大地降低了终端成本。此外，该终端还可采用自学习的方法，根据用户的设置以及应用频率等策略，在数据库中存储常用的RAT协议栈及相应软件，使用户不必频繁的重复下载同样的资源，进来避免了资源的浪费。(3) The terminal equipment is a reconfigurable terminal, which has great flexibility and expansibility. It can be downloaded from the software database by downloading software or protocol stacks under the premise of maintaining user calls and various business continuity. Reconfiguration is used to provide users with mobility support between cross-domain heterogeneous networks, which makes up for the lack of flexibility of existing multi-mode terminals, and at the same time greatly reduces terminal costs. In addition, the terminal can also use the self-learning method to store commonly used RAT protocol stacks and corresponding software in the database according to user settings and application frequency strategies, so that users do not have to download the same resources frequently and repeatedly. waste.
(4)在支持网络触发和判决，加入网络策略和用户喜好，优化的垂直切换方法的同时，可以兼容地支持终端触发和判决的切换方法，具有很好的通用性、可扩展性和移植性。(4) While supporting network triggering and judgment, adding network policies and user preferences, and optimizing the vertical handover method, it can also compatiblely support the handover method of terminal triggering and judgment, which has good versatility, scalability and portability .
值得注意，因为跨域异构网络是最复杂的相邻网络关系，所以下面实施例中所描述的切换方法既然能够适用于跨域异构网络，那么当然还可以适用于其他的相邻网络，例如适用于非跨域非异构、跨域非异构、非跨域异构等多种相邻网络。It is worth noting that since the cross-domain heterogeneous network is the most complex adjacent network relationship, since the handover method described in the following embodiments can be applied to the cross-domain heterogeneous network, it can also be applied to other adjacent networks. For example, it is applicable to various adjacent networks such as non-cross-domain non-heterogeneous, cross-domain non-heterogeneous, and non-cross-domain heterogeneous.
显然，本领域的技术人员应该明白，上述的本发明的各模块或各步骤可以用通用的计算装置来实现，它们可以集中在单个的计算装置上，或者分布在多个计算装置所组成的网络上，可选地，它们可以用计算装置可执行的程序代码来实现，从而，可以将它们存储在存储装置中由计算装置来执行，或者将它们分别制作成各个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样，本发明不限制于任何特定的硬件和软件结合。应该明白，这些具体实施中的变化对于本领域的技术人员来说是显而易见的，不脱离本发明的精神保护范围。Obviously, those skilled in the art should understand that each module or each step of the above-mentioned present invention can be realized by a general-purpose computing device, and they can be concentrated on a single computing device, or distributed in a network formed by multiple computing devices Optionally, they can be implemented with program codes executable by a computing device, so that they can be stored in a storage device and executed by a computing device, or they can be made into individual integrated circuit modules, or they can be integrated into Multiple modules or steps are fabricated into a single integrated circuit module to realize. As such, the present invention is not limited to any specific combination of hardware and software. It should be understood that changes in these specific implementations are obvious to those skilled in the art and do not depart from the spirit protection scope of the present invention.
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.
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