CN102025601B - Data encapsulation method and system - Google Patents

Data encapsulation method and system Download PDF

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CN102025601B
CN102025601B CN200910174693.5A CN200910174693A CN102025601B CN 102025601 B CN102025601 B CN 102025601B CN 200910174693 A CN200910174693 A CN 200910174693A CN 102025601 B CN102025601 B CN 102025601B
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rid
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CN102025601A (en
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金友兴
符涛
王卫斌
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Zhongka Digital Technology Kunshan Co ltd
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ZTE Corp
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46Interconnection of networks
    • H04L12/4633Interconnection of networks using encapsulation techniques, e.g. tunneling

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Abstract

一种数据封装方法及系统,路由节点接收到源终端发往目的终端的报文时,在报文中增加一封装层,并在封装层中封装终端发送报文的序列信息;目的终端所在的路由节点接收到报文时,进行解封装处理,并根据所述序列信息对接收到的报文进行排序后,发送给目的终端。在封装头中带了序列号信息,在接收ASN侧可以根据序列号信息来判断在传输路径上是否有乱序或者丢包;如果发生了乱序,则在接收ASN侧可以根据序列号递增的特性进行乱序处理,提高传输质量;此外,在封装头中还可以携带消息类型,以区分信令和数据,便于ASN之间非数据报文的交换。

A data encapsulation method and system. When a routing node receives a message sent from a source terminal to a destination terminal, an encapsulation layer is added to the message, and the sequence information of the message sent by the terminal is encapsulated in the encapsulation layer; When the routing node receives the message, it performs decapsulation processing, sorts the received message according to the sequence information, and sends it to the destination terminal. The serial number information is carried in the encapsulation header, and the receiving ASN side can judge whether there is out-of-order or packet loss on the transmission path according to the serial number information; if out-of-order occurs, the receiving ASN side can increment the serial number Features are processed out of order to improve transmission quality; in addition, the message type can also be carried in the encapsulation header to distinguish signaling and data, and facilitate the exchange of non-data messages between ASNs.

Description

一种数据封装方法及系统A data encapsulation method and system

技术领域technical field

本发明涉及通信领域,尤其涉及一种数据封装方法及系统。The invention relates to the communication field, in particular to a data encapsulation method and system.

背景技术Background technique

现有因特网广泛使用的TCP/IP(Transmission Control Protocol/InternetProtocol,传输控制协议/互联网络协议)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扑中的位置标识,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,不仅路由要发生变化,通信终端主机的身份标识也发生变化,这样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。The IP address in TCP/IP (Transmission Control Protocol/Internet Protocol), which is widely used in the Internet, has dual functions. As the identity of the network interface of the transport layer host. At the beginning of the TCP/IP protocol design, the movement of the host was not considered. However, when the host mobile becomes more and more common, the semantic overload defect of this IP address becomes more and more obvious. When the IP address of the host changes, not only the route will change, but also the identity of the communication terminal host will change, which will lead to a heavier and heavier routing load, and the change of the host identity will also cause the interruption of applications and connections.

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、安全等问题,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。The purpose of the separation of identity and location is to solve the semantic overload of IP addresses, serious routing load, and security issues, and to separate the dual functions of IP addresses to achieve mobility, multi-homing, dynamic reallocation of IP addresses, Support for alleviating routing load and mutual access between different network areas in the next generation Internet.

目前已有的身份标识和位置分离解决方案中存在如下问题:发送到终端的数据包是经过不同的IP路由(如核心交换路由器或其他路由器)到达终端的,而每条路由的延时是不同的,导致终端收到的数据包,尤其在用户移动过程中可能会产生乱序问题。而现有技术中并不存在对乱序的数据进行排序处理的机制。The following problems exist in the existing identification and location separation solutions: the data packets sent to the terminal arrive at the terminal through different IP routes (such as core switching routers or other routers), and the delay of each route is different. Yes, the data packets received by the terminal may be out of order, especially when the user is moving. However, there is no mechanism for sorting out-of-order data in the prior art.

发明内容Contents of the invention

本发明要解决的技术问题是提供一种数据封装方法及系统,在身份标识和位置分离架构下,解决报文在传输过程中或用户移动过程中的乱序及丢包问题。The technical problem to be solved by the present invention is to provide a data encapsulation method and system, which can solve the problem of out-of-sequence and packet loss in the process of message transmission or user movement under the framework of separation of identity and location.

为了解决上述问题,本发明提供了一种数据封装方法,包括:In order to solve the above problems, the present invention provides a data encapsulation method, comprising:

路由节点接收到源终端发往目的终端的报文时,在所述报文中增加一封装层,并在所述封装层中封装所述终端发送所述报文的序列信息、和源路由位置标识RID、和目标RID、和源用户标识AID、和目标AID;When the routing node receives a message sent by the source terminal to the destination terminal, it adds an encapsulation layer to the message, and encapsulates the sequence information and the source routing location of the message sent by the terminal in the encapsulation layer Identification RID, and target RID, and source user identification AID, and target AID;

所述目的终端所在的路由节点接收到所述报文时,进行解封装处理,并根据所述序列信息对接收到的报文进行排序后,发送给所述目的终端。When the routing node where the destination terminal is located receives the message, it performs decapsulation processing, sorts the received message according to the sequence information, and sends it to the destination terminal.

进一步地,所述封装层中包含一标识位字段,用于标识所述报文是否带有序列信息。Further, the encapsulation layer includes an identification bit field for identifying whether the message carries sequence information.

进一步地,所述源终端所在的路由节点采用用户数据报协议(UDP)的方式对所述报文进行数据封装。Further, the routing node where the source terminal is located encapsulates the data of the message in a user datagram protocol (UDP) manner.

进一步地,所述封装层中还包含以下字段中的一种或其任意组合:Further, the encapsulation layer also includes one or any combination of the following fields:

消息类型字段,用于标识所述报文是数据包还是信令包,如果是信令包,则还用于标识信令的类型;版本号字段,用于标识所述数据封装格式的版本号;预留字段。The message type field is used to identify whether the message is a data packet or a signaling packet, and if it is a signaling packet, it is also used to identify the type of signaling; the version number field is used to identify the version number of the data encapsulation format ; Reserved field.

本发明所要解决的另一技术问题是提供一种数据封装方法,应用于身份标识和位置分离架构,包括:Another technical problem to be solved by the present invention is to provide a data encapsulation method, which is applied to the identity identification and location separation architecture, including:

源接入支持节点(ASN)或互通网关节点(ISN)接收到源终端发往位于所述架构的目的终端的报文时,在所述报文中增加一封装层,所述封装层中包含所述终端发送所述报文的序列信息、和源路由位置标识RID、和目标RID、和源用户标识AID、和目标AID;When the source access support node (ASN) or the interworking gateway node (ISN) receives the message sent by the source terminal to the destination terminal located in the architecture, an encapsulation layer is added to the message, and the encapsulation layer includes The terminal sends the sequence information of the message, and the source routing location identifier RID, and the target RID, and the source user identifier AID, and the target AID;

所述目的终端所在的目的ASN接收到所述报文时,进行解封装处理,并根据所述序列信息对接收到的报文进行排序后,发送给所述目的终端。When the destination ASN where the destination terminal is located receives the message, it decapsulates the message, sorts the received message according to the sequence information, and sends it to the destination terminal.

进一步地,所述源ASN或ISN根据接收到的所述数据报文中的目的AID查询对应的路由位置标识(RID),并将查询到的目的RID封装在所述数据报文中,转发到骨干网;Further, the source ASN or ISN queries the corresponding routing location identifier (RID) according to the received destination AID in the data message, encapsulates the queried destination RID in the data message, and forwards it to backbone network;

所述骨干网根据所述目的RID将所述数据报文转发至所述目的ASN。The backbone network forwards the data packet to the destination ASN according to the destination RID.

进一步地,所述源ASN或ISN在查询所述对应的RID时,首先查询本地是否保存有所述目的AID的身份位置标识映射信息,在没有保存的情况下,向映射平面查询所述AID与RID的映射信息,Further, when the source ASN or ISN inquires about the corresponding RID, it first inquires whether the identity and location identification mapping information of the destination AID is stored locally, and if it is not stored, queries the mapping plane for the AID and RID mapping information,

进一步地,所述报文包括数据包或信令包,且所述封装模块数据包与信令包采用统一的格式。Further, the message includes a data packet or a signaling packet, and the data packet and the signaling packet of the encapsulation module adopt a unified format.

进一步地,所述封装层中包含以下字段中的一种或其任意组合:Further, the encapsulation layer contains one or any combination of the following fields:

标识位字段,用于标识所述报文是否带有序列信息;An identification bit field, used to identify whether the message contains sequence information;

消息类型字段,用于标识所述报文是数据包还是信令包,如果是信令包,则还用于标识信令的类型;版本号字段,用于标识所述数据封装格式的版本号;预留字段。The message type field is used to identify whether the message is a data packet or a signaling packet, and if it is a signaling packet, it is also used to identify the type of signaling; the version number field is used to identify the version number of the data encapsulation format ; Reserved field.

进一步地,所述报文采用标准的IP包;所述源ASN采用UDP的方式对所述报文进行数据封装。Further, the message adopts a standard IP packet; the source ASN uses UDP to encapsulate the data of the message.

本发明还提供了一种数据封装系统,包括:路由节点和终端,所述路由节点进一步包括封装模块、解封装模块和转发模块,其中,The present invention also provides a data encapsulation system, including: a routing node and a terminal, and the routing node further includes an encapsulation module, a decapsulation module and a forwarding module, wherein,

所述封装模块用于,在接收到源终端发出的报文时,在所述报文中增加一封装层,并在所述封装层中封装所述终端发送所述报文的序列信息、和源路由位置标识RID、和目标RID、和源用户标识AID、和目标AID后,发送给所述转发模块;The encapsulation module is configured to, when receiving a message sent by a source terminal, add an encapsulation layer to the message, and encapsulate sequence information of the message sent by the terminal in the encapsulation layer, and After the source routing location identifier RID, and the target RID, and the source user identifier AID, and the target AID, send it to the forwarding module;

所述解封装模块用于,接收到发往目的终端的所述报文时,进行解封装处理后,发送给所述转发模块;The decapsulation module is configured to, when receiving the message sent to the destination terminal, perform decapsulation processing and send it to the forwarding module;

所述转发模块用于,在接收到所述封装模块发送的数据报文时,转发给目的路由节点的解封装模块;以及,在接收到所述解封装模块发送的数据报文时,根据所述序列信息对接收到的报文进行排序后,发送给所述目的终端。The forwarding module is configured to, when receiving the data message sent by the encapsulation module, forward it to the decapsulation module of the destination routing node; and, when receiving the data message sent by the decapsulation module, according to the After sorting the received packets according to the sequence information, the packets are sent to the destination terminal.

进一步地,所述封装模块还用于,在所述封装层中封装一标识位字段,用于标识所述报文是否带有序列信息。Further, the encapsulation module is further configured to encapsulate an identification bit field in the encapsulation layer for identifying whether the message carries sequence information.

进一步地,所述封装模块采用UDP的方式对所述报文进行数据封装。Further, the encapsulation module performs data encapsulation on the message in a UDP manner.

进一步地,所述封装模块还用于,在所述封装层中封装以下字段中的一种或其任意组合:Further, the encapsulation module is also used for encapsulating one or any combination of the following fields in the encapsulation layer:

消息类型字段,用于标识所述报文是数据包还是信令包,如果是信令包,则还用于标识信令的类型;版本号字段,用于标识所述数据封装格式的版本号;预留字段。The message type field is used to identify whether the message is a data packet or a signaling packet, and if it is a signaling packet, it is also used to identify the type of signaling; the version number field is used to identify the version number of the data encapsulation format ; Reserved field.

本发明还提供了一种数据封装系统,应用于身份标识和位置分离架构,包括ASN、ISN和终端,其中所述ASN进一步包括封装模块、解封装模块和转发模块,其中:The present invention also provides a data encapsulation system, which is applied to the identity identification and location separation architecture, including ASN, ISN and terminal, wherein the ASN further includes an encapsulation module, a decapsulation module and a forwarding module, wherein:

所述封装模块用于,接收到源终端发往位于所述架构的目的终端的报文时,在所述报文中增加一封装层,所述封装层中包含所述终端发送所述报文的序列信息、和源路由位置标识RID、和目标RID、和源用户标识AID、和目标AID;The encapsulation module is configured to add an encapsulation layer to the message when receiving a message sent by the source terminal to the destination terminal located in the architecture, and the encapsulation layer includes the terminal sending the message sequence information, and the source routing location identifier RID, and the target RID, and the source user identifier AID, and the target AID;

所述解封装模块用于,接收到发往目的终端的所述报文时,进行解封装处理后,发送给所述转发模块;The decapsulation module is configured to, when receiving the message sent to the destination terminal, perform decapsulation processing and send it to the forwarding module;

所述转发模块用于,在接收到所述封装模块发送的数据报文时,转发给目的ASN的解封装模块;以及,在接收到所述解封装模块发送的数据报文时,根据所述序列信息对接收到的报文进行排序后,发送给所述目的终端。The forwarding module is configured to, when receiving the data message sent by the encapsulation module, forward it to the decapsulation module of the destination ASN; and, when receiving the data message sent by the decapsulation module, according to the The sequence information sorts the received packets and sends them to the destination terminal.

进一步地,封装模块用于,根据接收到的数据报文中的目的AID查询对应的RID,并将查询到的目的RID封装在所述数据报文中,转发到骨干网;Further, the encapsulation module is used to query the corresponding RID according to the purpose AID in the received data message, and encapsulate the queried purpose RID in the data message, and forward it to the backbone network;

所述骨干网根据所述目的RID将所述数据报文转发至所述目的ASN。The backbone network forwards the data packet to the destination ASN according to the destination RID.

进一步地,所述封装模块用于,在查询所述对应的RID时,首先查询本地是否保存有所述目的AID的身份位置标识映射信息,在没有保存的情况下,向映射平面查询所述AID与RID的映射信息,Further, the encapsulation module is configured to, when inquiring about the corresponding RID, first inquire whether the identity location identification mapping information of the target AID is saved locally, and inquire about the AID in the mapping plane if it is not saved. Mapping information with RID,

进一步地,所述封装模块用于,对数据包或信令包类型的报文采用统一的格式进行封装。Further, the encapsulation module is used for encapsulating the data packets or signaling packets in a uniform format.

进一步地,所述封装模块还用于,在所述封装层中封装以下字段中的一种或其任意组合:Further, the encapsulation module is also used for encapsulating one or any combination of the following fields in the encapsulation layer:

标识位字段,用于标识所述报文是否带有序列信息;An identification bit field, used to identify whether the message contains sequence information;

消息类型字段,用于标识所述报文是数据包还是信令包,如果是信令包,则还用于标识信令的类型;The message type field is used to identify whether the message is a data packet or a signaling packet, and if it is a signaling packet, it is also used to identify the type of signaling;

版本号字段,用于标识所述数据封装格式的版本号;A version number field, used to identify the version number of the data encapsulation format;

预留字段。Reserved field.

进一步地,所述封装模块采用UDP的方式对所述报文进行数据封装。Further, the encapsulation module performs data encapsulation on the message in a UDP manner.

采用上述的数据封装格式,至少具有如下有益效果:Adopting the above-mentioned data encapsulation format has at least the following beneficial effects:

1、在封装头中带了序列号信息,在接收ASN可以根据序列号信息来判断在传输路径上是否有乱序或者丢包;如果发生了乱序,则在接收ASN侧可以根据序列号递增的特性进行乱序处理,提高了传输质量;1. The serial number information is included in the encapsulation header, and the receiving ASN can judge whether there is out-of-order or packet loss on the transmission path according to the serial number information; if out-of-order occurs, the receiving ASN can increment according to the serial number out-of-order processing to improve the transmission quality;

2、在封装头中带有消息类型,可以区分信令和数据,便于ASN之间非数据报文的交换;2. There is a message type in the encapsulation header, which can distinguish signaling and data, and facilitate the exchange of non-data messages between ASNs;

3、在封装头中带有版本号,在以后协议有升级的时候,可以根据版本号,保证不同协议版本的ASN之间进行互相通信;3. There is a version number in the encapsulation header. When the protocol is upgraded in the future, the version number can be used to ensure that ASNs of different protocol versions communicate with each other;

4、在封装头中带有标志字段S,只有这个S为1,才表示包头中的序列号是有意义的,如果在传输质量很好的场景下,可以不带序列号,这时S位为0;4. There is a flag field S in the encapsulation header. Only when this S is 1, it means that the serial number in the header is meaningful. If the transmission quality is good, the serial number can be omitted. At this time, the S bit is 0;

5、在封装头中带有保留字段,便于以后对协议的扩展。这字段可以用于标识封装数据中不同的数据内容;5. There are reserved fields in the encapsulation header, which is convenient for future expansion of the protocol. This field can be used to identify different data content in the encapsulated data;

6、封装后的数据包可以在IP骨干网络上进行路由,现有骨干网络上的路由器不需要做任何修改。6. The encapsulated data packets can be routed on the IP backbone network, and the routers on the existing backbone network do not need to be modified in any way.

附图说明Description of drawings

图1是本发明实施例中身份标识和位置分离网络的架构的网络拓扑示意图;Fig. 1 is a schematic network topology diagram of the architecture of the identity and location separation network in the embodiment of the present invention;

图2为本发明实施例的数据封装系统的示意框图。Fig. 2 is a schematic block diagram of a data encapsulation system according to an embodiment of the present invention.

具体实施方式Detailed ways

下面将结合附图及实施例对本发明进行更详细的说明。The present invention will be described in more detail below in conjunction with the accompanying drawings and embodiments.

为了克服现有技术的不足,本实施例提出了一种基于网络的身份标识和位置分离架构,其核心思想是:将网络划分为接入网和骨干网,为网络中的每个用户分配唯一的用户身份标识,该用户身份标识在移动过程中始终保持不变;网络中有两种标识类型:用户身份标识(Access Identifier,简称AID)和路由位置标识(Routing-Location Identifier,简称RID)。其中AID是为网络中每个用户分配的唯一的身份标识,只能在接入层使用,且在用户终端的移动过程中始终保持不变,用户终端间使用AID标识对端,用户终端间只需使用对端的AID进行通信;RID是为用户终端分配的路由位置标识,只能在骨干网使用。In order to overcome the deficiencies of the existing technologies, this embodiment proposes a network-based identity and location separation architecture, the core idea of which is: divide the network into an access network and a backbone network, and assign a unique There are two types of identification in the network: Access Identifier (AID for short) and Routing-Location Identifier (RID for short). Among them, AID is a unique identity assigned to each user in the network. It can only be used at the access layer and remains unchanged during the movement of the user terminal. The AID is used between user terminals to identify the opposite end. The AID of the opposite end needs to be used for communication; RID is a routing location identifier allocated for user terminals and can only be used in the backbone network.

本实施例的基于身份标识和位置分离架构具体的网络拓扑如图1所示,其中每个网元的逻辑功能如下:The specific network topology of the identity-based and location-separated architecture of this embodiment is shown in Figure 1, where the logical functions of each network element are as follows:

1.接入支持节点(Access Support Node,简称ASN)1. Access Support Node (ASN for short)

接入支持节点负责为各种移动终端提供接入服务,为接入的用户分配AID和RID,并对终端发出的数据报文进行标识封装后在核心网中传输。The access support node is responsible for providing access services for various mobile terminals, assigning AID and RID to the accessing users, and marking and encapsulating the data packets sent by the terminals before transmitting them in the core network.

2.映射平面2. Mapping plane

映射平面主要负责维护身份标识和位置分离网络中用户身份标识和路由位置标识的映射关系(即RID-AID映射关系),并向ASN和其它映射服务器提供查询服务。映射平面由多个身份位置寄存器(Identity Location Register,简称ILR)组成,在ASN查询通信对端位置过程中,如果ASN本地没有通信对端的路由位置信息,就通过映射平面去查找。The mapping plane is mainly responsible for maintaining the mapping relationship between the user identity and the routing location in the identity and location separation network (that is, the RID-AID mapping relationship), and providing query services to the ASN and other mapping servers. The mapping plane is composed of multiple Identity Location Registers (ILR for short). During the process of ASN querying the location of the communication peer, if the ASN does not have the routing location information of the communication peer locally, it will be searched through the mapping plane.

3.认证中心3. Certification center

认证中心负责记录用户类别、用户服务等级等信息,在用户接入时对用户进行合法性认证和授权。认证中心支持网络与用户间的双向鉴权。The authentication center is responsible for recording information such as user categories and user service levels, and performs legal authentication and authorization for users when they access. The authentication center supports two-way authentication between the network and users.

4.IP骨干网4. IP backbone network

IP骨干网是ASN之间的互联网络,主要功能是根据数据报文中的路由位置标识进行选路和转发数据报文,把ASN发出的数据转发到正确的目的地;IP网络由核心交换路由器(Central Switch Router,简称CSR)组成。与现有的IP网络是一样的,不需要进行任何修改。The IP backbone network is an interconnected network between ASNs. Its main function is to select routes and forward data packets according to the routing location identifiers in the data packets, and to forward the data sent by the ASN to the correct destination; the IP network is composed of core switching routers. (Central Switch Router, CSR for short). It is the same as the existing IP network without any modification.

5.互通网关节点(Interconnect Service Node,简称ISN)5. Interconnect Service Node (ISN for short)

ISN是身份位置分离网络与其他网络,例如Internet的互通节点,两类不同的网络必须通过ISN进行互相通信。ISN封装、路由并转发本架构网络与传统IP网络之间往来的数据报文。The ISN is the interworking node between the identity and location separation network and other networks, such as the Internet. Two types of different networks must communicate with each other through the ISN. The ISN encapsulates, routes, and forwards data packets between the architecture network and the traditional IP network.

6.无线网络6. Wireless network

无线网络负责提供并维护用户终端到ASN之间的二层链路(物理层和链路层),在蜂窝移动网络中,负责无线资源分配和管理等功能。此处的无线网络可以是WCDMA(Wideband CDMA,宽带码分多址),TD-SCDMA(TimeDivision-Synchronous Code Division Multiple Access,时分同步码分多址),CDMA2000,LTE(Long Term Evolution,长期演进)等无线网络。The wireless network is responsible for providing and maintaining the two-layer link (physical layer and link layer) between the user terminal and the ASN. In the cellular mobile network, it is responsible for functions such as wireless resource allocation and management. The wireless network here can be WCDMA (Wideband CDMA, wideband code division multiple access), TD-SCDMA (TimeDivision-Synchronous Code Division Multiple Access, time division synchronous code division multiple access), CDMA2000, LTE (Long Term Evolution, long-term evolution) Waiting for wifi.

在ASN上为每个本地接入的移动终端(Mobile Node,简称MN)保存所有的通信对端(Correspondent Node,简称CN)的信息,当移动终端的位置发生变化的时候,新的ASN将把此时终端位置的标识通知给通信对端所在的ASN,通信对端有多个的时候,需要通知到每个CN,保证各个CN把数据包发给正确的ASN。On the ASN, information of all Correspondent Nodes (CN) is saved for each locally accessed mobile terminal (Mobile Node, referred to as MN). When the location of the mobile terminal changes, the new ASN will At this time, the identification of the terminal location is notified to the ASN where the communication peer is located. When there are multiple communication peers, each CN needs to be notified to ensure that each CN sends the data packet to the correct ASN.

本实施例中提供了一种基于上述身份标识和位置分离架构下ASN之间以及ASN与ISN之间的数据封装格式,封装后的数据可以标识终端发出报文的时序,接收到数据的终端可以根据标识对数据进行排序。This embodiment provides a data encapsulation format between ASNs and between ASNs and ISNs based on the above identity and location separation architecture. The encapsulated data can identify the timing of the terminal sending the message, and the terminal receiving the data can Sort the data by ID.

本实施例的数据封装方法并不局限于应用于上述架构,也可以适用于多种其他架构或通信网络。The data encapsulation method in this embodiment is not limited to be applied to the above-mentioned architecture, and may also be applicable to various other architectures or communication networks.

例如,在本发明其他实施例中,路由节点接收到源终端发往目的终端的报文时,在报文中增加一封装层,并在封装层中封装终端发送报文的序列信息;目的终端所在的路由节点接收到所述报文时,进行解封装处理,并根据所述序列信息对接收到的报文进行排序后,发送给目的终端。For example, in other embodiments of the present invention, when the routing node receives a message sent from the source terminal to the destination terminal, an encapsulation layer is added to the message, and the sequence information of the message sent by the terminal is encapsulated in the encapsulation layer; the destination terminal When the routing node where it is located receives the message, it performs decapsulation processing, sorts the received message according to the sequence information, and sends it to the destination terminal.

此外,该封装层中还包含以下字段中的一种或其任意组合:In addition, the encapsulation layer also contains one or any combination of the following fields:

标识位字段,用于标识所述报文是否带有序列信息;An identification bit field, used to identify whether the message contains sequence information;

消息类型字段,用于标识所述报文是数据包还是信令包,如果是信令包,则还用于标识信令的类型;The message type field is used to identify whether the message is a data packet or a signaling packet, and if it is a signaling packet, it is also used to identify the type of signaling;

版本号字段,用于标识所述数据封装格式的版本号;A version number field, used to identify the version number of the data encapsulation format;

预留字段。Reserved field.

本实施例中,ASN和ISN在接收到终端发出的报文时,具体处理如下:In this embodiment, when the ASN and the ISN receive the message sent by the terminal, the specific processing is as follows:

采用UDP(User Datagram Protocol,用户数据报协议)的方式对报文进行数据封装,在终端发出的报文中加上一个封装层,在封装头携带终端发出报文的时序信息,例如,针对每一个发出终端,在发出的报文中包含递增的序列号,从而,接收端可以根据该序列号来判断报文的乱序及丢包情况。Use UDP (User Datagram Protocol, User Datagram Protocol) to encapsulate the data of the message, add an encapsulation layer to the message sent by the terminal, and carry the timing information of the message sent by the terminal in the encapsulation header, for example, for each A sending terminal includes an increasing serial number in the sent message, so that the receiving end can judge the out-of-sequence and packet loss of the message according to the serial number.

具体的实现可以采用如下封装格式:The specific implementation can adopt the following packaging format:

IP头IP header 源RIDsource RID 目标RIDTarget RID UDP头UDP header 封装层encapsulation layer 源AIDSource AID 目标AIDTarget AID 数据包/信令包Data Packet/Signaling Packet

为了充分利用现有骨干网络,本实施例中,ASN之间的数据包、及ASN与ISN之间均采用标准的IP包,保证封装后的数据包可以在IP骨干网络上正常进行路由。In order to make full use of the existing backbone network, in this embodiment, standard IP packets are used for data packets between ASNs and between ASNs and ISNs, so as to ensure that the encapsulated data packets can be normally routed on the IP backbone network.

下面结合两个应用实例对本发明数据封装的具体实施方式作进一步详细描述。The specific implementation manner of the data encapsulation of the present invention will be further described in detail below in conjunction with two application examples.

应用实例一Application example one

基于身份标识和位置分离架构网络内的终端在进行通信时,ASN之间的数据报文的转发流程如下:When the terminals in the network based on identity identification and location separation are communicating, the forwarding process of data packets between ASNs is as follows:

步骤101:源ASN接收终端发送来的数据包:Step 101: The source ASN receives the data packet sent by the terminal:

数据包格式为标准的IPV4数据包格式,源地址和目的地址分别为源AID和目的AID(即通信对端的AID);The data packet format is a standard IPV4 data packet format, and the source address and destination address are respectively the source AID and the destination AID (that is, the AID of the communication peer);

步骤102:源ASN进行数据封装;Step 102: data encapsulation by the source ASN;

源ASN接收到数据包后,根据其中的目的AID查询本地缓存中的AID-RID映射表:如果没有查到对应的AID-RID映射条目,则通过查询映射平面,得到通信对端的RID,将其作为目标RID封装在报文头部;并增加一个封装层,该封装层中至少包含数据包发送的序列号。其中封装RID的目的是用于进行路由转发;After the source ASN receives the data packet, it queries the AID-RID mapping table in the local cache according to the destination AID in it: if no corresponding AID-RID mapping entry is found, it obtains the RID of the communication peer by querying the mapping plane, and converts it to It is encapsulated in the header of the message as the target RID; and an encapsulation layer is added, and the encapsulation layer at least includes the serial number sent by the data packet. The purpose of encapsulating the RID is for routing and forwarding;

本实施例中,源ASN封装后的数据包格式如下(该表中每行有4个字节):In this embodiment, the format of the packet after source ASN encapsulation is as follows (each row has 4 bytes in this table):

其中,各字段的含义说明如下:Among them, the meaning of each field is explained as follows:

标准IP头:即传统IP网络的IP包头;Standard IP header: that is, the IP header of the traditional IP network;

源RID:指源ASN的RID;Source RID: refers to the RID of the source ASN;

目标RID:指目的ASN的RID;Target RID: refers to the RID of the target ASN;

源端口,目的端口,UDP长度,UDP校验:即传统的UDP头;Source port, destination port, UDP length, UDP checksum: the traditional UDP header;

源AID:指发出数据包的源用户标识;Source AID: refers to the source user ID of the data packet;

目标AID:指接收数据包的目标用户标识;Target AID: refers to the target user ID of the received data packet;

消息类型:用于表明该封装报文是数据还是信令,如果是信令还可以区分不同的信令;Message type: used to indicate whether the encapsulated message is data or signaling, and if it is signaling, different signaling can be distinguished;

版本号(可选):占4个比特,指该数据封装格式的版本号,便于以后扩展;Version number (optional): 4 bits, which refers to the version number of the data encapsulation format, which is convenient for future expansion;

Res(可选):占3个比特,作为预留字段,便于以后扩展;Res (optional): occupies 3 bits and is used as a reserved field for future expansion;

S(可选):占1比特,标识本数据报文是否带序列号,如果S为1,则说明后面的序列号字段是有效的,如果S为0,则说明后面的序列号字段是无效的。S (optional): Occupies 1 bit, indicating whether the data message has a serial number. If S is 1, it indicates that the subsequent serial number field is valid. If S is 0, it indicates that the subsequent serial number field is invalid. of.

序列号:指数据发送端ASN针对每个相同的AID,在发出的数据包中带上的递增的序列号,在接收端可以根据这个序列号来判断乱序以及丢包情况。序列号占2个字节。Sequence number: Refers to the incremental sequence number carried in the sent data packet by the ASN of the data sender for each same AID. The sequence number and packet loss can be judged at the receiver according to this sequence number. The serial number occupies 2 bytes.

源ASN封装后,数据包的源地址和目的地址为源ASN和目的ASN的RID,步骤1中的用户数据格式和内容保持不变,封装后的数据发送到广义转发平面,广义转发平面根据目的ASN的路由标识RID将其转发到目的ASN;After the source ASN is encapsulated, the source address and destination address of the data packet are the RIDs of the source ASN and the destination ASN. The user data format and content in step 1 remain unchanged, and the encapsulated data is sent to the generalized forwarding plane. The routing identifier RID of the ASN forwards it to the destination ASN;

步骤103:目的ASN接收到数据包包进行解封装,将整个封装头都去掉,恢复为封装前的数据格式,将数据发送给目标AID标识的用户;同时,接收到数据包的ASN可以根据需要使用封装头中的序列号对接收到的数据包进行排序处理。例如,在终端发生移动的情况下,切换刚完成的时候,会有部分数据从原来的ASN转发到新的ASN过来,这种情况下,新的ASN需要根据序列号对这些数据进行排序。Step 103: The destination ASN receives the data packet and decapsulates it, removes the entire encapsulation header, restores the data format before encapsulation, and sends the data to the user identified by the target AID; meanwhile, the ASN that receives the data packet can Sequence the received packets using the sequence numbers in the encapsulation header. For example, when the terminal moves, some data will be forwarded from the original ASN to the new ASN when the handover is just completed. In this case, the new ASN needs to sort the data according to the sequence number.

应用实例二Application example two

当传统IP网络内的终端访问本发明基于身份标识和位置分离架构网络内的终端时,数据报文的转发流程如下:When a terminal in a traditional IP network accesses a terminal in the network based on the separation of identity and location in the present invention, the forwarding process of the data message is as follows:

步骤201:ISN接收终端发送来的数据包,该数据包格式是标准的IPV4的数据包;Step 201: the ISN receives the data packet sent by the terminal, and the data packet format is a standard IPV4 data packet;

步骤202,ISN对数据包进行封装,其封装格式与步骤102相同;In step 202, the ISN encapsulates the data packet, and its encapsulation format is the same as in step 102;

ISN根据数据报文中目的地址即通信对端的AID查询本地缓存中的AID-RID映射表:如果查到对应的AID-RID映射条目,将CN的RID作为目的地址封装在报文头部,转发到广义转发平面;如果没有查到对应的AID-RID映射条目,则将数据报文做隧道封装后转发到映射转发平面,由映射转发平面查到对应的AID-RID映射条目,将CN的RID作为目的地址封装在报文头部,转发到广义转发平面。The ISN queries the AID-RID mapping table in the local cache according to the destination address in the data message, that is, the AID of the communication peer: if the corresponding AID-RID mapping entry is found, encapsulate the RID of the CN as the destination address in the message header, forward to the generalized forwarding plane; if no corresponding AID-RID mapping entry is found, the data packet is tunneled and encapsulated and forwarded to the mapping forwarding plane, and the corresponding AID-RID mapping entry is found by the mapping forwarding plane, and the RID of CN It is encapsulated in the packet header as the destination address and forwarded to the generalized forwarding plane.

并且,当ISN查不到对应的AID-RID映射条目时,会向映射转发平面发出查询AID-RID映射关系的流程,在接收到映射转发平面返回AID-RID映射关系后,保存到本地缓存中。Moreover, when the ISN cannot find the corresponding AID-RID mapping entry, it will send a process of querying the AID-RID mapping relationship to the mapping forwarding plane, and save it in the local cache after receiving the AID-RID mapping relationship returned by the mapping forwarding plane .

步骤203,广义转发平面将数据报文发送到目的ASN,目的ASN对接收到的数据报文进行解封装处理,剥去数据报文头部的RID封装,将解封装后的数据报文的源地址目的地址转换为传统Internet网络支持的IP地址格式。Step 203, the generalized forwarding plane sends the data message to the destination ASN, and the destination ASN decapsulates the received data message, strips off the RID encapsulation of the data message header, and decapsulates the source of the decapsulated data message The destination address of the address is translated into the IP address format supported by the traditional Internet network.

上述实例是以数据包为例对本发明的数据封装过程进行说明,对于信令包其实施步骤同样适用。The above example uses the data packet as an example to illustrate the data encapsulation process of the present invention, and the implementation steps are also applicable to the signaling packet.

此外,本发明实例中为便于简化处理,ASN和ASN之间,以及ASN和ISN之间的数据包和信令包均采用统一的格式。在格式相同的情况下,ASN或ISN对数据包或信令包进行处理的时候,只需根据消息头的固定位置就可以判断出是数据和信令,从而可以提高系统的处理速度。In addition, in order to simplify the processing in the example of the present invention, the data packets and signaling packets between ASN and ASN, and between ASN and ISN all adopt a unified format. In the case of the same format, when an ASN or ISN processes a data packet or a signaling packet, it can be judged that it is data or signaling only according to the fixed position of the message header, so that the processing speed of the system can be improved.

本发明中,ASN或ISN仅在收到终端发出的数据/信令报文时,进行序列号的封装;在接收到发往终端的报文时,ASN或ISN根据序列号进行排序(如果需要的话),再进行解封装后发给目的终端。In the present invention, ASN or ISN only carries out the encapsulation of serial number when receiving the data/signaling message that terminal sends out; When receiving the message that sends to terminal, ASN or ISN sort according to serial number words), and then send it to the destination terminal after being decapsulated.

如图2所示,本发明还提供了一种数据封装系统,应用于身份标识和位置分离架构,包括ASN、ISN和终端,其中ASN和ISN进一步包括封装模块、解封装模块和转发模块。其中,各网元/模块的功能如下:As shown in Fig. 2, the present invention also provides a data encapsulation system, which is applied to the identity identification and location separation architecture, including ASN, ISN and terminal, wherein ASN and ISN further include encapsulation module, decapsulation module and forwarding module. Among them, the functions of each network element/module are as follows:

封装模块用于,接收到源终端发往位于本架构的目的终端的报文时,在报文中增加一封装层,封装层中包含终端发送报文的序列信息;The encapsulation module is used to add an encapsulation layer to the message when receiving the message sent by the source terminal to the destination terminal located in this architecture, and the encapsulation layer contains the sequence information of the message sent by the terminal;

解封装模块用于,接收到发往目的终端的报文时,进行解封装处理后,发送给转发模块;The decapsulation module is used to, when receiving a message sent to the destination terminal, perform decapsulation processing and send it to the forwarding module;

转发模块用于,在接收到封装模块发送的数据报文时,转发给目的ASN的解封装模块;以及,在接收到解封装模块发送的数据报文时,根据所述序列信息对接收到的报文进行排序后,发送给所述目的终端。The forwarding module is used for forwarding to the decapsulation module of the destination ASN when receiving the data message sent by the encapsulation module; and, when receiving the data message sent by the decapsulation module, according to the sequence information received After the packets are sorted, they are sent to the destination terminal.

其中,封装模块还用于,根据接收到的数据报文中的目的AID查询对应的RID,并将查询到的目的RID封装在数据报文中,转发到骨干网;Wherein, the encapsulation module is also used for querying the corresponding RID according to the purpose AID in the received data message, and encapsulating the queried purpose RID in the data message and forwarding to the backbone network;

骨干网根据目的RID将数据报文转发至目的ASN。The backbone network forwards the data packet to the destination ASN according to the destination RID.

进一步地,封装模块还用于,在查询对应的RID时,首先查询本地是否保存有目的AID的身份位置标识映射信息,在没有保存的情况下,向映射平面查询AID与RID的映射信息,Further, the encapsulation module is also used to, when inquiring about the corresponding RID, first inquire whether the identity location identification mapping information of the target AID is stored locally, and if not, query the mapping plane for the mapping information between the AID and the RID,

进一步地,所述封装模块用于对包括数据包或信令包报文采用统一的格式进行封装。Further, the encapsulation module is used for encapsulating messages including data packets or signaling packets in a uniform format.

进一步地,封装模块还用于,在封装层中封装以下字段中的一种或其任意组合:Further, the encapsulation module is also used to encapsulate one or any combination of the following fields in the encapsulation layer:

标识位字段,用于标识报文是否带有序列信息;The identification field is used to identify whether the message has sequence information;

消息类型字段,用于标识报文是数据包还是信令包,如果是信令包,则还用于标识信令的类型;The message type field is used to identify whether the message is a data packet or a signaling packet, and if it is a signaling packet, it is also used to identify the type of signaling;

版本号字段,用于标识数据封装格式的版本号;The version number field is used to identify the version number of the data encapsulation format;

预留字段。Reserved field.

进一步地,封装模块采用UDP的方式对报文进行数据封装。Further, the encapsulation module uses UDP to encapsulate the data of the message.

Claims (20)

1. a data encapsulation method, is characterized in that, comprising:
When routing node receives source terminal and mails to the message of object terminal, in described message, increase by an encapsulated layer, and in described encapsulated layer, encapsulate sequence information and source routing station location marker RID and target RID and source user sign AID and target AID that described terminal sends described message;
When the routing node at described object terminal place receives described message, carry out decapsulation processing, and after the message receiving being sorted according to described sequence information, send to described object terminal.
2. the method for claim 1, is characterized in that,
In described encapsulated layer, comprise a flag field, for whether identifying described message with sequence information.
3. the method for claim 1, is characterized in that,
The routing node at described source terminal place adopts the mode of User Datagram Protoco (UDP) UDP to carry out data encapsulation to described message.
4. the method as described in claim 1,2 or 3, is characterized in that,
In described encapsulated layer, also comprise a kind of or its combination in any in following field:
Message type field, is packet or signaling bag for identifying described message, if signaling bag, also for identifying the type of signaling; Version number field, for identifying the version number of described data encapsulation form; Reserved field.
5. a data encapsulation method, is applied to identify label and position separation, it is characterized in that, comprising:
When source access support node ASN or Interworking gateway node ISN receive source terminal and mail to the message of the object terminal that is positioned at described framework, in described message, increase by an encapsulated layer, in described encapsulated layer, comprise sequence information and source routing station location marker RID and target RID and source user sign AID and target AID that described terminal sends described message;
When the object ASN at described object terminal place receives described message, carry out decapsulation processing, and after the message receiving being sorted according to described sequence information, send to described object terminal.
6. method as claimed in claim 5, is characterized in that,
Described source ASN or ISN inquire about corresponding route station location marker RID according to the object AID in the described data message receiving, and the object RID inquiring is encapsulated in described data message, are forwarded to backbone network;
Described backbone network according to described object RID by described data message forwarding to described object ASN.
7. method as claimed in claim 6, is characterized in that,
Described source ASN or ISN are when the RID of the described correspondence of inquiry, and first the local identity station location marker map information of whether preserving described object AID of inquiry, in the situation that not preserving, inquires about the map information of described AID and RID to mapping plane.
8. method as claimed in claim 5, is characterized in that,
Described message comprises packet or signaling bag, and described package module packet and signaling bag adopt unified form.
9. method as claimed in claim 5, is characterized in that,
In described encapsulated layer, comprise a kind of or its combination in any in following field:
Whether flag field, for identifying described message with sequence information;
Message type field, is packet or signaling bag for identifying described message, if signaling bag, also for identifying the type of signaling;
Version number field, for identifying the version number of described data encapsulation form;
Reserved field.
10. if claim 5 to 9 is to the method as described in any one, it is characterized in that,
Described message adopts the IP bag of standard; Described source ASN adopts the mode of UDP to carry out data encapsulation to described message.
11. 1 kinds of data encapsulation systems, is characterized in that, comprising: routing node and terminal, and described routing node further comprises package module, decapsulation module and forwarding module, wherein,
Described package module is used for, when receiving the message that source terminal sends, in described message, increase by an encapsulated layer, and in described encapsulated layer, encapsulate described terminal and send after the sequence information of described message and source routing station location marker RID and target RID and source user sign AID and target AID, send to described forwarding module;
Described decapsulation module is used for, and while receiving the described message that mails to object terminal, carries out, after decapsulation processing, sending to described forwarding module;
Described forwarding module is used for, and when receiving the data message of described package module transmission, is transmitted to the decapsulation module of object routing node; And, when receiving the data message of described decapsulation module transmission, after the message receiving being sorted according to described sequence information, send to described object terminal.
12. systems as claimed in claim 11, is characterized in that,
Described package module also for, in described encapsulated layer, encapsulate a flag field, for whether identifying described message with sequence information.
13. systems as claimed in claim 11, is characterized in that,
Described package module adopts the mode of UDP to carry out data encapsulation to described message.
14. systems as described in claim 11,12 or 13, is characterized in that,
Package module also for, in described encapsulated layer, encapsulate a kind of or its combination in any in following field:
Message type field, is packet or signaling bag for identifying described message, if signaling bag, also for identifying the type of signaling; Version number field, for identifying the version number of described data encapsulation form; Reserved field.
15. 1 kinds of data encapsulation systems, are applied to identify label and position separation, it is characterized in that, comprise ASN, ISN and terminal, and wherein said ASN further comprises package module, decapsulation module and forwarding module, wherein:
Described package module is used for, when receiving source terminal and mailing to the message of the object terminal that is positioned at described framework, in described message, increase by an encapsulated layer, in described encapsulated layer, comprise sequence information and source routing station location marker RID and target RID and source user sign AID and target AID that described terminal sends described message;
Described decapsulation module is used for, and while receiving the described message that mails to object terminal, carries out, after decapsulation processing, sending to described forwarding module;
Described forwarding module is used for, and when receiving the data message of described package module transmission, is transmitted to the decapsulation module of object ASN; And, when receiving the data message of described decapsulation module transmission, after the message receiving being sorted according to described sequence information, send to described object terminal.
16. systems as claimed in claim 15, is characterized in that,
Described package module is used for, and inquires about corresponding RID, and the object RID inquiring is encapsulated in described data message according to the object AID in the described data message receiving, and is forwarded to backbone network;
Described backbone network according to described object RID by described data message forwarding to described object ASN.
17. systems as claimed in claim 16, is characterized in that,
Described package module is used for, and when the RID of the described correspondence of inquiry, first the local identity station location marker map information of whether preserving described object AID of inquiry, in the situation that not preserving, inquires about the map information of described AID and RID to mapping plane.
18. systems as claimed in claim 15, is characterized in that,
Described package module is used for, and to the message of packet or signaling bag type, adopts unified form to encapsulate.
19. systems as claimed in claim 15, is characterized in that,
Described package module also for, in described encapsulated layer, encapsulate a kind of or its combination in any in following field:
Whether flag field, for identifying described message with sequence information;
Message type field, is packet or signaling bag for identifying described message, if signaling bag, also for identifying the type of signaling;
Version number field, for identifying the version number of described data encapsulation form;
Reserved field.
20. if claim 15 to 19 is to the system as described in any one, it is characterized in that,
Described package module adopts the mode of UDP to carry out data encapsulation to described message.
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