技术领域technical field
本发明涉及通信领域中的数据流传输技术领域，尤其涉及一种数据流传输方法、装置及系统。The present invention relates to the technical field of data stream transmission in the communication field, in particular to a data stream transmission method, device and system.
背景技术Background technique
在传统互联网的传输控制协议/互联网协议(Transmission ControlProtocol/Internet Protocol，TCP/IP)体系中，IP地址既代表节点的位置标识，又代表节点的主机标识，网络层使用IP地址作为节点在网络中的位置标识，用于路由，传输层使用IP地址作为节点的主机标识，用于建立传输层的连接。当节点由于发生移动而改变其IP地址时，传输层连接中断，需要重新建立连接。因此，传统互联网的TCP/IP协议体系不利于支持移动节点的会话连续性。In the Transmission Control Protocol/Internet Protocol (TCP/IP) system of the traditional Internet, the IP address not only represents the location identification of the node, but also represents the host identification of the node. The network layer uses the IP address as the node in the network. The location identifier of is used for routing, and the transport layer uses the IP address as the host identifier of the node, which is used to establish the connection of the transport layer. When a node changes its IP address due to movement, the connection at the transport layer is interrupted and the connection needs to be re-established. Therefore, the TCP/IP protocol system of the traditional Internet is not conducive to supporting the session continuity of the mobile node.
为解决传统互联网移动性问题，提出了把IP地址的主机标识功能和位置标识功能进行分离的方案，采用这种技术方案的网络可以称为标识网络，例如由互联网工程任务组(Internet Engineering Task Force，IETF)和互联网研究任务组(Internet Research Task Force，IRTF)联合提出的主机标识协议(HostIdentity Protocol，HIP)，通过在网络层和传输层之间增加新的主机标识层，引入经过加密的主机标识标签(Host Identity Tag，HIT)作为节点的主机标识；传统IP地址则仅作为节点在网络中的位置标识，用于路由。由此分离传统IP地址的位置标识与主机标识的双重功能，高层应用通过主机标识来标识主机，网络层通过IP地址定位主机，当IP地址改变时，只要主机标识不变，高层应用就不会改变，从而保持了会话的持续性，较好地解决了移动性问题。In order to solve the mobility problem of the traditional Internet, a scheme of separating the host identification function and the location identification function of the IP address is proposed. The network using this technical solution can be called an identification network. For example, the Internet Engineering Task Force (Internet Engineering Task Force) , IETF) and the Internet Research Task Force (IRTF) jointly proposed the Host Identity Protocol (HostIdentity Protocol, HIP), by adding a new host identity layer between the network layer and the transport layer, the introduction of encrypted host The Host Identity Tag (HIT) is used as the host identifier of the node; the traditional IP address is only used as the location identifier of the node in the network for routing. This separates the dual functions of traditional IP address location identification and host identification. High-level applications identify the host through the host identification, and the network layer locates the host through the IP address. When the IP address changes, as long as the host identification remains unchanged, the high-level application will not Changes, thereby maintaining the continuity of the session, and better solving the mobility problem.
HIP中所使用的主机标识(Host Identifier，HI)实质上是一对公私钥对中的公钥。由于HI的长度因不同的公钥系统算法而不同，所以在实际协议中通常使用固定长度的主机标识标签(Host Identity Tag，HIT)或区域范围标识符(Local Scope Identifier，LSI)。HIT是对HI的128位哈希结果值，与IPv6具有相同的地址长度。LSI是长度为32位的本地化的主机标志，是为了保证与现有的基于IPv4的协议和API兼容而设计的。The host identifier (Host Identifier, HI) used in HIP is essentially a public key in a pair of public and private keys. Since the length of HI varies with different public key system algorithms, a fixed-length host identity tag (Host Identity Tag, HIT) or local scope identifier (Local Scope Identifier, LSI) is usually used in the actual protocol. HIT is the 128-bit hash result value of HI, and has the same address length as IPv6. LSI is a 32-bit localized host identifier designed to ensure compatibility with existing IPv4-based protocols and APIs.
当HIP主机移动时，可以通过HI来进行安全认证，其不同于其他移动解决方案的一个最突出的特点是它与密钥系统和互联网协议安全性IPSec紧密结合在一起，也就是说，它内含的安全特性是它最显著的优势。HIP协议中通过基础交换建立了一对不同方向的封装安全载荷协议ESP的安全关联信息SA，后继的用户数据通过ESP机制使用SA进行传输。When the HIP host moves, security authentication can be performed through HI. One of the most prominent features different from other mobile solutions is that it is closely integrated with the key system and Internet Protocol Security IPSec, that is, its internal The included security features are its most notable advantage. In the HIP protocol, a pair of security association information SA of the Encapsulating Security Payload Protocol ESP in different directions is established through basic exchange, and subsequent user data is transmitted using the SA through the ESP mechanism.
在HIP命名空间中，HI代表一个全球唯一的静态名字，全球唯一标识一个主机。一个主机可以有一个或多个HI，HI的存储和查找可以由主机自己来完成，即实现匿名，也可以由第三方来执行。在移动环境下，由于节点具有移动性，其IP地址将会随着节点的移动而更新，在此情况下，可以使用动态域名系统DNS(Domain Name System)服务器来提供相对静态的域名与动态IP地址的映射。但是在HIP环境中，考虑两个通信节点同时移动的情况，该协议设计了汇聚服务器RVS(Rendezvous Server)来存储节点当前的IP地址信息。而DNS服务器此时记录的是节点注册的RVS的IP地址，以及节点的HI/HIT值，RVS始终维护节点当前的可达IP地址。通信起始，通信节点通过查询DNS服务器获取移动节点的HI/HIT以及RVS地址，然后把HIP包直接发送到RVS，由RVS转发初始的HIP包到移动节点的当前地址。所有后续的数据包由通信双方直接交换，RVS不再参与，即使在通信过程中一方地址改变了，也可以通过使用HI认证将IP地址的变化直接通知通信对端，使通信继续。In the HIP namespace, HI represents a globally unique static name that uniquely identifies a host globally. A host can have one or more HIs. The storage and lookup of HIs can be done by the host itself, that is, to achieve anonymity, or it can be performed by a third party. In a mobile environment, due to the mobility of the node, its IP address will be updated with the movement of the node. In this case, a dynamic domain name system DNS (Domain Name System) server can be used to provide a relatively static domain name and dynamic IP address mapping. But in the HIP environment, considering the situation that two communication nodes move at the same time, the protocol designs a rendezvous server RVS (Rendezvous Server) to store the current IP address information of the nodes. At this time, the DNS server records the IP address of the RVS registered by the node and the HI/HIT value of the node. RVS always maintains the current reachable IP address of the node. At the beginning of communication, the communication node obtains the HI/HIT and RVS address of the mobile node by querying the DNS server, and then directly sends the HIP packet to the RVS, and the RVS forwards the initial HIP packet to the current address of the mobile node. All subsequent data packets are directly exchanged by the two parties in communication, and RVS is no longer involved. Even if the address of one party changes during the communication process, the communication peer can be directly notified of the IP address change by using HI authentication, so that the communication can continue.
现有的HIP协议支持主机多家乡的场景。多家乡主机将其自身的多个IP地址通过参数通知通信对端，并声明某个地址为首选地址。通信时，通信对端选择多家乡主机声明的首选地址作为通信地址，当该地址不可达或者多家乡主机声明另外一个首选地址时，通信对端将当前使用的该多家乡主机的地址更新为另外一个，即实现了面向连接的移动性管理，但目前的HIP协议还无法实现面向数据流的移动性管理。The existing HIP protocol supports the scenario where the host has multiple home states. The multi-homed host notifies the communication peer of its own multiple IP addresses through parameters, and declares a certain address as the preferred address. When communicating, the communication peer selects the preferred address declared by the multi-home host as the communication address. When the address is unreachable or the multi-home host declares another preferred address, the communication peer updates the currently used address of the multi-home host to another One is to realize the connection-oriented mobility management, but the current HIP protocol cannot realize the data flow-oriented mobility management.
发明内容Contents of the invention
本发明实施例提供一种数据流传输方法、装置及系统，用以在标识网络中实现面向数据流的移动性管理。Embodiments of the present invention provide a data flow transmission method, device and system for realizing data flow-oriented mobility management in an identification network.
本发明实施例提供一种数据流传输方法，包括：An embodiment of the present invention provides a data stream transmission method, including:
标识网络中的多家乡主机确定出请求重定向的数据流，以及传输所述数据流使用的所述多家乡主机的更新地址；并identifying a multi-homed host in the network to determine a data flow requesting redirection, and an updated address of the multi-homed host used to transmit the data flow; and
向所述数据流对应的通信对端发送地址更新消息，所述地址更新消息中携带所述数据流的流标识和所述更新地址的对应关系；并sending an address update message to the communication peer corresponding to the data flow, where the address update message carries a correspondence between the flow identifier of the data flow and the update address; and
在接收到所述通信对端返回的地址更新成功响应后，通过所述更新地址与所述通信对端传输所述数据流。After receiving the address update success response returned by the communication peer, the data flow is transmitted with the communication peer through the update address.
本发明实施例还提供一种数据流传输方法，包括：The embodiment of the present invention also provides a data stream transmission method, including:
标识网络中的多家乡主机接收通信对端发送的地址更新消息，所述地址更新消息中携带数据流的流标识和传输所述数据流使用的所述通信对端的更新地址的对应关系；并The multi-homed host in the identification network receives the address update message sent by the communication peer, and the address update message carries the correspondence between the flow identifier of the data flow and the update address of the communication peer used to transmit the data flow; and
基于所述对应关系，使用所述更新地址更新传输所述数据流使用的所述通信对端的原地址；并Based on the corresponding relationship, using the updated address to update the original address of the communication peer used to transmit the data stream; and
在向所述通信对端返回地址更新成功响应后，通过所述更新地址与所述通信对端传输所述数据流。After returning an address update success response to the communication peer, transmitting the data flow with the communication peer through the update address.
本发明实施例还提供一种多家乡主机，包括：The embodiment of the present invention also provides a multi-home host, including:
确定单元，用于确定出请求重定向的数据流，以及传输所述数据流使用的本多家乡主机的更新地址；A determining unit, configured to determine the data flow requested to be redirected, and the update address of the multi-home host used to transmit the data flow;
传输单元，用于向所述数据流对应的通信对端发送地址更新消息，所述地址更新消息中携带所述数据流的流标识和所述更新地址的对应关系；并在接收到所述通信对端返回的地址更新成功响应后，通过所述更新地址与所述通信对端传输所述数据流。a transmission unit, configured to send an address update message to a communication peer corresponding to the data flow, where the address update message carries a correspondence between the flow identifier of the data flow and the update address; and upon receiving the communication After the address update success response returned by the peer end, transmit the data flow with the communication peer end through the updated address.
本发明实施例还提供一种多家乡主机，包括：The embodiment of the present invention also provides a multi-home host, including:
传输单元，用于接收通信对端发送的地址更新消息，所述地址更新消息中携带数据流的流标识和传输所述数据流使用的所述通信对端的更新地址的对应关系；并在向所述通信对端返回地址更新成功响应后，通过所述更新地址与所述通信对端传输所述数据流；The transmission unit is configured to receive an address update message sent by a communication peer, where the address update message carries a correspondence between the stream identifier of the data flow and the update address of the communication peer used to transmit the data flow; After the communication peer returns a successful address update response, transmit the data flow with the communication peer through the update address;
更新单元，用于基于所述对应关系，使用所述更新地址更新传输所述数据流使用的所述通信对端的原地址。An updating unit, configured to use the updated address to update the original address of the communication peer used to transmit the data stream based on the correspondence.
本发明实施例还提供一种数据流传输系统，包括：多家乡主机和通信对端，其中：The embodiment of the present invention also provides a data stream transmission system, including: a multi-home host and a communication peer, wherein:
所述多家乡主机，用于确定出请求重定向的数据流，以及传输所述数据流使用的本多家乡主机的更新地址；并向所述数据流对应的所述通信对端发送地址更新消息，所述地址更新消息中携带所述数据流的流标识和所述更新地址的对应关系；并在接收到所述通信对端返回的地址更新成功响应后，通过所述更新地址与所述通信对端传输所述数据流；The multi-home host is used to determine the data stream that requests redirection, and the update address of the multi-home host used to transmit the data stream; and send an address update message to the communication peer corresponding to the data stream , the address update message carries the corresponding relationship between the flow identifier of the data flow and the update address; and after receiving the address update success response returned by the communication peer, communicates with the The peer transmits the data stream;
所述通信对端，用于接收所述多家乡主机发送的所述地址更新消息；并基于所述对应关系，使用所述更新地址更新传输所述数据流使用的所述多家乡主机的原地址；并在向所述多家乡主机返回所述地址更新成功响应后，通过所述更新地址与所述多家乡主机传输所述数据流。The communication peer is configured to receive the address update message sent by the multi-home host; and based on the correspondence, use the updated address to update the original address of the multi-home host used to transmit the data stream ; and after returning the address update success response to the multi-home host, transmitting the data flow with the multi-home host through the updated address.
本发明实施例提供的方法中，标识网络中的多家乡主机在确定出请求重定向的数据流，以及确定出传输该数据流使用的该多家乡主机的更新地址后，通过向该数据流对应的通信对端发送地址更新消息，并在该地址更新消息中携带该数据流的流标识和该更新地址的对应关系，用于与该通信对端协商地址的更新；相应的，该通信对端在接收到该地址更新消息后，基于其中携带的该对应关系，使用该更新地址更新传输该数据流使用的该多家乡主机的原地址，并向该多家乡主机返回地址更新成功响应；在多家乡主机与通信完成对端针对传输请求重定向的数据流使用的地址更新的协商后，两者通过该更新地址传输该数据流。由于本发明实施例提供的方案中，地址的更新是针对数据流进行的，所以实现了面向数据流的移动性管理。In the method provided by the embodiment of the present invention, after the multi-homed host in the identification network determines the data stream requesting redirection and the update address of the multi-homed host used to transmit the data stream, it corresponds to the data stream The communication peer sends an address update message, and carries the corresponding relationship between the flow identifier of the data flow and the update address in the address update message, and is used to negotiate with the communication peer for address update; correspondingly, the communication peer After receiving the address update message, based on the corresponding relationship carried therein, use the updated address to update the original address of the multi-home host used to transmit the data flow, and return an address update success response to the multi-home host; After the home host and the communication complete the negotiation on the update of the address used by the opposite end for the data flow redirected by the transmission request, the two transmit the data flow through the updated address. In the solution provided by the embodiment of the present invention, the update of the address is performed for the data flow, so the mobility management oriented to the data flow is realized.
附图说明Description of drawings
图1为本发明实施例提供的数据流传输方法的流程图；FIG. 1 is a flowchart of a data stream transmission method provided by an embodiment of the present invention;
图2为本发明实施例1提供的数据流传输方法的流程图；FIG. 2 is a flow chart of the data stream transmission method provided by Embodiment 1 of the present invention;
图3为本发明实施例1提供的数据流传输方法中地址更新消息中的流标识与更新地址对应关系条目的结构示意图；FIG. 3 is a schematic structural diagram of entries corresponding to stream identifiers and update addresses in the address update message in the data stream transmission method provided by Embodiment 1 of the present invention;
图4为本发明实施例2提供的多家乡主机的结构示意图；FIG. 4 is a schematic structural diagram of a multi-home host provided in Embodiment 2 of the present invention;
图5为本发明实施例3提供的多家乡主机的结构示意图；FIG. 5 is a schematic structural diagram of a multi-home host provided in Embodiment 3 of the present invention;
图6为本发明实施例4提供的数据流传输系统的结构示意图。FIG. 6 is a schematic structural diagram of a data stream transmission system provided by Embodiment 4 of the present invention.
具体实施方式Detailed ways
为了给出在标识网络中实现面向数据流的移动性管理的实现方案，本发明实施例提供了一种数据流传输方法、装置及系统，以下结合说明书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。并且在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。In order to provide an implementation scheme for implementing data flow-oriented mobility management in an identification network, embodiments of the present invention provide a data flow transmission method, device, and system. 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, not to limit the present invention. And in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.
本发明实施例提供一种数据流传输方法，如图1所示，包括：An embodiment of the present invention provides a data stream transmission method, as shown in FIG. 1 , including:
步骤S101、标识网络中的多家乡主机确定出请求重定向的数据流，以及传输该数据流使用的该多家乡主机的更新地址。Step S101 , identify the multi-homed host in the network, determine the data stream requesting redirection, and the update address of the multi-homed host used to transmit the data stream.
步骤S102、向该数据流对应的通信对端发送地址更新消息，该地址更新消息中携带该数据流的流标识和该更新地址的对应关系。Step S102 , sending an address update message to the communication peer corresponding to the data flow, where the address update message carries the correspondence between the flow identifier of the data flow and the update address.
步骤S103、在接收到该通信对端返回的地址更新成功响应后，通过该更新地址与该通信对端传输该数据流。Step S103, after receiving the address update success response returned by the communication peer, transmit the data flow with the communication peer through the updated address.
较佳的，在上述步骤S102中发送的地址更新消息中还可以携带安全关联更新信息，用于与该通信对端协商更新传输该数据流使用的安全关联信息；Preferably, the address update message sent in the above step S102 may also carry security association update information for negotiating with the communication peer to update the security association information used to transmit the data stream;
多家乡主机在接收到通信对端返回的安全关联信息更新成功响应后，使用更新后的安全关联信息传输数据流。The multi-homed host uses the updated security association information to transmit the data flow after receiving the security association information update success response returned by the communication peer.
本发明上述实施例提供的数据流传输方案可用于标识网络中，例如，HIP网络、位置标识与身份标识分离协议LISP(Locator/ID Separation Protocol)网络和SHIM6网络，下面结合附图，以HIP网络为例，用具体实施例对本发明提供的方法及装置和相应系统进行详细描述。The data stream transmission scheme provided by the above-mentioned embodiments of the present invention can be used in an identification network, for example, a HIP network, a LISP (Locator/ID Separation Protocol) network and a SHIM6 network. As an example, the method, device and corresponding system provided by the present invention will be described in detail with specific embodiments.
实施例1：Example 1:
图2为本发明实施例1提供的数据流传输方法的流程图，包括：FIG. 2 is a flow chart of the data stream transmission method provided by Embodiment 1 of the present invention, including:
步骤S201、多家乡主机确定出请求重定向的数据流，即请求重定向的数据流在被重定向后，相比传输该数据流使用的该多家乡主机的原地址，将使用该多家乡主机的更新地址传输该数据流；本步骤中，还相应确定出传输该请求重定向的数据流的该多家乡主机的更新地址。Step S201, the multi-homed host determines the data flow requested to be redirected, that is, after the data stream requested to be redirected is redirected, compared with the original address of the multi-homed host used to transmit the data stream, the multi-homed host will be used In this step, the update address of the multi-homed host that transmits the data stream requested to be redirected is correspondingly determined.
具体的，可以从多家乡主机的可用地址的变化，传输数据流时地址的传输特性，以及多个地址的数据传输量之间的负载均衡等方面考虑，确定出请求重定向的数据流，以及相应的所使用的更新地址，本实施例1中具体提供如下三种确定方式：Specifically, the change of the available address of the multi-homed host, the transmission characteristics of the address when transmitting the data stream, and the load balancing among the data transmission volumes of multiple addresses can be considered to determine the data stream for request redirection, and Correspondingly, the update address used in this embodiment 1 specifically provides the following three determination methods:
方式一：当多家乡主机多个当前可用地址中，有的地址变更为不可用时，例如该多家乡主机的移动引起的地址更新导致原地址不可用，确定出多家乡主机的当前不可用地址；并确定通过当前不可用地址传输的数据流为请求重定向的数据流，此时是由于原地址不可用，需要更新地址，以便保证数据流的传输需要。Method 1: When some of the multiple currently available addresses of the multi-home host are changed to be unavailable, for example, the address update caused by the movement of the multi-home host makes the original address unavailable, and the currently unavailable address of the multi-home host is determined; And it is determined that the data flow transmitted through the currently unavailable address is the data flow requested to be redirected. At this time, because the original address is unavailable, the address needs to be updated to ensure the transmission of the data flow.
相应的，可以确定多家乡主机的当前可用地址之一为传输该数据流的多家乡主机的更新地址，当前可用地址可以为原可用地址，可以为多家乡主机的新可用地址。Correspondingly, one of the current available addresses of the multi-homed host may be determined as an updated address of the multi-homed host transmitting the data stream, the current available address may be an original available address, or a new available address of the multi-homed host.
基于方式一确定请求重定向的数据流和相应的更新地址，能够保证数据流的连续传输，避免因地址不可用导致数据流传输的中断。Determining the data flow requested for redirection and the corresponding update address based on the first method can ensure continuous transmission of the data flow and avoid interruption of data flow transmission due to unavailable addresses.
方式二：在多家乡主机获得了新可用地址时，例如该多家乡主机的移动引起的地址更新使其获得了新可用地址，确定出多家乡主机的新可用地址；并基于该新可用地址的传输特性和当前传输的各数据流的传输特性，确定出需要优先通过该新可用地址传输的数据流为请求重定向的数据流；其中，地址的传输特性可以为使用该地址传输数据流时能够达到的传输质量，如计费、安全性、传输效率和可靠性等方面的传输质量，数据流的传输特性可以为传输该数据流时所需要达到的计费、安全性、传输效率和可靠性等传输要求。当前传输的各数据流中，使用当前的地址传输时可能无法保证其中部分数据流的传输要求，而如果使用新可用地址传输时则可以提高传输质量，满足传输要求，所以，对于该部分数据流可以确定为请求重定向的数据流。Method 2: When the multi-homed host obtains a new available address, for example, the address update caused by the movement of the multi-homed host makes it obtain a new available address, and determine the new available address of the multi-homed host; and based on the new available address The transmission characteristics and the transmission characteristics of each data stream currently being transmitted determine that the data flow that needs to be transmitted preferentially through the new available address is the data flow that requests redirection; wherein, the transmission characteristics of the address can be that the data flow can be transmitted using the address The transmission quality achieved, such as the transmission quality in terms of billing, security, transmission efficiency and reliability, etc., the transmission characteristics of the data stream can be the billing, security, transmission efficiency and reliability that need to be achieved when transmitting the data stream and other transmission requirements. Among the currently transmitted data streams, the transmission requirements of some of the data streams may not be guaranteed when the current address is used for transmission, but the transmission quality can be improved and the transmission requirements can be met if the new available address is used for transmission. Therefore, for this part of the data stream The stream of data that can be identified as request redirection.
相应的，新可能地址即可以确定为传输请求重定向的数据流的多家乡主机的更新地址。Correspondingly, the new possible address can be determined as the updated address of the multi-homed host that transmits the data flow requesting redirection.
基于方式二确定请求重定向的数据流和相应的更新地址，由于通过地址更新，对于请求重定向的数据使用更适合的地址来传输，进而提高了这些数据流的传输质量和传输效果。Based on the determination of the redirected data flow and the corresponding update address based on the second method, through the address update, the redirected data is transmitted using a more suitable address, thereby improving the transmission quality and transmission effect of these data flows.
方式三：基于负载均衡策略确定出多家乡主机的多个地址中数据传输量大的地址；并确定通过该数据传输量大的地址传输的数据流中的部分数据流为请求重定向的数据流，其中，部分数据流的具体数量可以为设定值，也可以为使用该地址传输的数据流的全部数量的设定百分比的数量。Method 3: Based on the load balancing strategy, determine the address with a large amount of data transmission among the multiple addresses of the multi-home host; and determine that part of the data flow transmitted through the address with a large amount of data transmission is the data flow for request redirection , where the specific number of partial data streams may be a set value, or may be a set percentage of the total number of data streams transmitted using the address.
相应的，可以确定多家乡主机的多个地址中数据传输量小的地址为传输请求重定向的数据流的多家乡主机的更新地址。Correspondingly, among the multiple addresses of the multi-homed host, an address with a small amount of data transmission may be determined as an update address of the multi-homed host that transmits the data flow requested to be redirected.
当多家乡主机存在多个地址时，使用每个地址传输数据流的数据传输量大小可能存在差异，对于数据传输量大的连接，其传输效率和质量将较低，所以基于方式三确定请求重定向的数据流和相应的更新地址，实现了各地址对应的连接的数据传输量的负载均衡，进而提高了多家乡主机传输数据流的整体传输效率和质量。When there are multiple addresses on a multi-homed host, the amount of data transmitted by each address may be different. For a connection with a large amount of data transmission, the transmission efficiency and quality will be low. The directional data flow and the corresponding update address realize the load balance of the data transmission volume of the connection corresponding to each address, thereby improving the overall transmission efficiency and quality of the multi-home host transmission data flow.
步骤S202、基于上述步骤S201中确定出的请求重定向的数据流以及相应的更新地址，生成地址更新消息，该地址更新消息中携带该数据流的流标识和该更新地址的对应关系。当确定出的请求重定向的数据流为多个时，地址更新消息中携带的对应关系相应为多个条目，每个条目为针对一个请求重定向的数据流的流标识与更新地址的对应关系。Step S202, based on the redirected data flow and the corresponding update address determined in the above step S201, an address update message is generated, and the address update message carries the corresponding relationship between the flow identifier of the data flow and the update address. When it is determined that there are multiple data flows requested to be redirected, the corresponding relationship carried in the address update message is correspondingly a plurality of entries, and each entry is the corresponding relationship between the flow identifier and the update address of a data flow requested to be redirected .
较佳的，由于一个更新地址可能对应了多个请求重定向的数据流，所以在生成的地址更新消息中还可以携带该数据流的优先级信息；由于针对一个请求重定向的数据流可能确定出多个对应的更新地址，所以地址更新消息中还可以携带该更新地址的优先级信息；当在更新地址对应了多个请求重定向的数据流，且针对请求重定向的数据流确定出了多个对应的更新地址时，也可以同时携带数据流的优先级信息和更新地址的优先级信息。Preferably, since an update address may correspond to multiple redirected data streams, the generated address update message may also carry the priority information of the data stream; Multiple corresponding update addresses can be generated, so the address update message can also carry the priority information of the update address; when the update address corresponds to multiple data streams that request redirection, and the When there are multiple corresponding update addresses, the priority information of the data flow and the priority information of the update addresses may also be carried at the same time.
以HIP协议为例，本实施例1中在发送的地址更新消息中的E_LOCATOR参数中携带流标识与更新地址的对应关系，并对每个流标识与更新地址的对应关系条目提出如图3所示的结构，其中，Traffic Type为数据流类型字段，用于定义该地址是否涉及到HIP的信令、用户数据，或者两者皆有；Locator Type为地址更新指示字段，为1时表示携带了更新的IP地址；Locator Length为地址长度字段；F为流标识指示标志位，为1时表示携带了与更新的IP地址对应的流标识，实现更新地址与数据流的绑定，为0时表示该更新地址没有具体的流绑定，适合传输任何数据流；P为首选地址指示标志位，为1时表示该地址为首选地址，否则设置为0；PRI为地址优先级信息字段；Locator Lifetime为地址生命周期字段，用于设置该地址的生命周期，单位为秒；Locator为地址字段，用于携带更新地址；FID(Flow Identification Mobility Option)为流标识移动性选项字段，用于携带流标识以识别一个数据流，以及还可以携带数据流的优先级信息。Taking the HIP protocol as an example, in this embodiment 1, the E_LOCATOR parameter in the address update message sent carries the corresponding relationship between the flow identifier and the update address, and proposes a corresponding relationship entry between each flow identifier and the update address as shown in Figure 3. The structure shown above, where, Traffic Type is the data flow type field, which is used to define whether the address involves HIP signaling, user data, or both; Locator Type is the address update indication field, and when it is 1, it means carrying The updated IP address; Locator Length is the address length field; F is the flow identifier indicator bit, when it is 1, it means that it carries the flow identifier corresponding to the updated IP address, and realizes the binding of the updated address and the data flow, when it is 0, it means The update address has no specific stream binding and is suitable for transmitting any data stream; P is the preferred address indication flag bit, when it is 1, it means that the address is the preferred address, otherwise it is set to 0; PRI is the address priority information field; Locator Lifetime is The address life cycle field is used to set the life cycle of the address, in seconds; Locator is the address field, used to carry the update address; FID (Flow Identification Mobility Option) is the flow identification mobility option field, used to carry the flow identification and A data flow is identified, and priority information of the data flow can also be carried.
较佳的，本实施例1中，多家乡主机在与通信对端面向数据流进行地址更新协商的同时，还可以针对该数据流传输时所使用的安全关联信息是否更新进行协商，如果不更新，则在该数据流重定向到更新地址后，仍使用原安全关联信息，如果更新，则使用更新的安全关联信息。Preferably, in Embodiment 1, while the multi-homed host is negotiating with the communication peer for address update for the data flow, it can also negotiate whether to update the security association information used when the data flow is transmitted. , after the data flow is redirected to the updated address, the original security association information is still used, and if updated, the updated security association information is used.
在多家乡主机确定更新安全关联信息时，可以在发送的地址更新消息中携带安全关联更新信息，用于与通信对端协商更新传输该数据流使用的安全关联信息。例如，以HIP协议为例，安全关联更新信息为SPI，具体的，可以在发送的地址更新消息中的ESP_INFO参数中携带，更新时携带与数据流的流标识对应的原SPI和更新的SPI，不更新时在应该携带更新的SPI的字段中仍然携带原SPI。When the multi-homed host determines to update the security association information, the address update message sent may carry the security association update information, which is used to negotiate with the communication peer to update the security association information used to transmit the data flow. For example, taking the HIP protocol as an example, the security association update information is SPI. Specifically, it can be carried in the ESP_INFO parameter in the address update message sent, and the original SPI and updated SPI corresponding to the flow identifier of the data flow are carried when updating. When not updating, the original SPI is still carried in the field that should carry the updated SPI.
步骤S203、多家乡主机向传输该数据流所对应的通信对端发送地址更新消息。Step S203, the multi-homed host sends an address update message to the communication peer corresponding to the data flow.
步骤S204、通信对端在接收到该地址更新消息后，从中获取携带的数据流的流标识和传输该数据流的多家乡主机的更新地址的对应关系，并基于该对应关系，确定出该流标识对应的数据流为请求重定向的数据流，相应的，确定出传输该数据流使用的多家乡主机的原地址，并使用对应的更新地址更新该原地址。Step S204: After receiving the address update message, the communication peer obtains the corresponding relationship between the flow identifier of the carried data flow and the update address of the multi-homed host transmitting the data flow, and determines the flow address based on the corresponding relationship. The corresponding data flow is identified as a data flow requesting redirection, and correspondingly, the original address of the multi-homed host used to transmit the data flow is determined, and the original address is updated with the corresponding update address.
如果在地址更新消息中携带了数据流的优先级信息，则当一个更新地址对应的数据流的流标识为多个时，根据该多个数据流的优先级信息，按照优先级从高到低的顺序更新传输该多个数据流使用的多家乡主机的原地址，即当无法更新所有这多个数据流的重定向地址时，则按数据流优先级从高到低的顺序更新。If the priority information of the data flow is carried in the address update message, when there are multiple flow identifications of the data flow corresponding to an updated address, according to the priority information of the multiple data flows, the priorities are from high to low Update the original addresses of the multihomed hosts used to transmit the multiple data streams in the order in which they are transmitted, that is, when the redirection addresses of all the multiple data streams cannot be updated, update them in the order of data stream priority from high to low.
如果在地址更新消息中携带了更新地址的优先级信息，则当一个数据流的流标识对应的更新地址为多个时，根据该多个更新地址的优先级信息，选择优先级高的更新地址更新该数据流使用的多家乡主机的原地址，例如，选择优先级最高的更新地址进行更新。If the priority information of the update address is carried in the address update message, when there are multiple update addresses corresponding to the flow identifier of a data flow, the update address with higher priority is selected according to the priority information of the multiple update addresses Update the original address of the multihomed host used by the data flow, for example, select the update address with the highest priority for update.
如果在地址更新消息中携带了安全关联更新信息，则根据携带的安全关联更新信息更新传输该数据流使用的原安全关联信息，得到更新后的安全关联信息，例如，携带的安全关联更新信息为SPI，且具体是在地址更新消息中携带与数据流的流标识对应的原SPI和更新的SPI，则根据更新的SPI确定出安全关联信息，作为更新后的安全关联信息。If the security association update information is carried in the address update message, the original security association information used to transmit the data flow is updated according to the carried security association update information, and the updated security association information is obtained. For example, the carried security association update information is SPI, and specifically carrying the original SPI and the updated SPI corresponding to the flow identifier of the data flow in the address update message, then determine the security association information according to the updated SPI as the updated security association information.
步骤S205、通信对端向多家乡主机返回地址更新成功响应，其中携带地址更新成功确认信息。Step S205, the communication peer returns an address update success response to the multi-home host, which carries address update success confirmation information.
如果还进行了安全关联信息更新的协商，则还返回安全关联信息更新成功响应，其中携带安全关联信息更新成功确认信息，较佳的，可以使用地址更新成功响应还作为安全关联信息更新成功响应，一起将地址更新协商结果和安全关联信息更新协商结果返回给多家乡主机。If the negotiation of security association information update is also carried out, a security association information update success response is also returned, which carries the security association information update success confirmation information. Preferably, the address update success response can also be used as the security association information update success response. Return the address update negotiation result and the security association information update negotiation result to the multi-homed host together.
步骤S206、如果在上述步骤S204中，通信对端对接收到的地址更新消息中携带的更新地址进行了验证，并在上述步骤S205中返回的地址更新成功响应中携带了地址验证结果信息，则需要执行步骤中，由多家乡主机在接收到地址更新成功响应后，向通信对端发送更新确认消息，其中携带对地址验证结果信息的确认，用于告知通信对端本次数据流重定向协商确认。Step S206, if in the above step S204, the communication peer verifies the update address carried in the received address update message, and the address verification result information is carried in the address update success response returned in the above step S205, then In the steps that need to be executed, after receiving the address update success response, the multi-home host sends an update confirmation message to the communication peer, which carries the confirmation of the address verification result information, and is used to inform the communication peer of this data stream redirection negotiation confirm.
如果上述步骤S204和步骤S205中不涉及上述地址验证机制，则不需要执行本步骤。If the above address verification mechanism is not involved in the above step S204 and step S205, this step does not need to be performed.
步骤S207、在完成上述步骤S201-步骤S206后，实现了针对当前已传输的数据流的重定向，多家乡主机和通信对端之间使用协商成功的更新地址传输该数据流，如果还更新了安全关联信息，则在传输该数据流时使用更新的安全关联信息。Step S207, after completing the above steps S201-Step S206, the redirection of the currently transmitted data flow is realized, and the updated address successfully negotiated is used between the multi-homed host and the communication peer to transmit the data flow. If the security association information is not used, the updated security association information is used when transmitting the data stream.
采用本发明上述实施例1提供的数据流传输方法，实现了面向数据流的移动性管理，相应的依据具体的管理策略，提高了数据流的传输质量和传输效率。Using the data stream transmission method provided in Embodiment 1 of the present invention realizes data stream-oriented mobility management, and correspondingly improves the transmission quality and transmission efficiency of data streams based on specific management strategies.
实施例2：Example 2:
基于同一发明构思，根据本发明上述实施例提供的数据流传输方法，相应地，本发明实施例2还提供了一种多家乡主机，其结构示意图如图4所示，包括：Based on the same inventive concept, according to the data stream transmission method provided by the above-mentioned embodiments of the present invention, correspondingly, Embodiment 2 of the present invention also provides a multi-home host, whose structural diagram is shown in FIG. 4 , including:
确定单元401，用于确定出请求重定向的数据流，以及传输该数据流使用的本多家乡主机的更新地址；A determining unit 401, configured to determine the data flow requested to be redirected, and the update address of the multi-home host used to transmit the data flow;
传输单元402，用于向该数据流对应的通信对端发送地址更新消息，地址更新消息中携带该数据流的流标识和该更新地址的对应关系；并在接收到该通信对端返回的地址更新成功响应后，通过该更新地址与该通信对端传输该数据流。The transmission unit 402 is configured to send an address update message to the communication peer corresponding to the data flow, where the address update message carries the correspondence between the flow identifier of the data flow and the update address; and upon receiving the address returned by the communication peer After the update responds successfully, transmit the data stream with the communication peer through the update address.
较佳的，确定单元401，具体用于确定出本多家乡主机的当前不可用地址；并确定通过该当前不可用地址传输的数据流为请求重定向的数据流；并确定本多家乡主机的当前可用地址之一为传输该数据流使用的本多家乡主机的更新地址；或者Preferably, the determining unit 401 is specifically configured to determine the current unavailable address of the multi-home host; and determine that the data stream transmitted through the currently unavailable address is a data stream requesting redirection; and determine the current unavailable address of the multi-home host. One of the currently available addresses is the updated address of the multihomed host used to transport the stream; or
确定出本多家乡主机的新可用地址；并基于该新可用地址的传输特性，确定出需要优先通过该新可用地址传输的数据流为请求重定向的数据流；并确定该新可用地址为传输该数据流使用的本多家乡主机的更新地址；或者Determine the new available address of the multihomed host; and based on the transmission characteristics of the new available address, determine that the data flow that needs to be transmitted preferentially through the new available address is the data flow that requests redirection; and determine that the new available address is the transmission The updated address of the multi-home host used by this stream; or
基于负载均衡策略确定出本多家乡主机的多个地址中数据传输量大的地址；并确定通过该数据传输量大的地址传输的数据流中的部分数据流为请求重定向的数据流；并确定本多家乡主机的多个地址中数据传输量小的地址为传输该请求重定向的数据流的本多家乡主机的更新地址。Based on the load balancing strategy, determine the address with a large amount of data transmission among the multiple addresses of the multi-home host; and determine that part of the data flow in the data flow transmitted through the address with a large amount of data transmission is the data flow for request redirection; and It is determined that an address with a small amount of data transmission among the multiple addresses of the local multi-home host is an update address of the local multi-home host that transmits the data stream that requests redirection.
较佳的，传输单元402发送的地址更新消息中还携带安全关联更新信息，用于与通信对端协商更新传输该数据流使用的安全关联信息；Preferably, the address update message sent by the transmission unit 402 also carries security association update information, which is used to negotiate with the communication peer to update the security association information used to transmit the data stream;
传输单元402，还用于在接收到通信对端返回的安全关联信息更新成功响应后，使用更新后的安全关联信息传输该数据流。The transmission unit 402 is further configured to use the updated security association information to transmit the data stream after receiving the security association information update success response returned by the communication peer.
较佳的，传输单元402发送的地址更新消息中还携带该数据流的优先级信息和/或该更新地址的优先级信息。Preferably, the address update message sent by the transmission unit 402 also carries the priority information of the data flow and/or the priority information of the updated address.
实施例3：Example 3:
基于同一发明构思，根据本发明上述实施例提供的数据流传输方法，相应地，本发明实施例3还提供了一种多家乡主机，其结构示意图如图5所示，包括：Based on the same inventive concept, according to the data stream transmission method provided by the above-mentioned embodiments of the present invention, correspondingly, Embodiment 3 of the present invention also provides a multi-home host, whose structural diagram is shown in FIG. 5 , including:
传输单元501，用于接收通信对端发送的地址更新消息，地址更新消息中携带数据流的流标识和传输该数据流使用的通信对端的更新地址的对应关系；并在向通信对端返回地址更新成功响应后，通过该更新地址与通信对端传输该数据流；The transmission unit 501 is configured to receive an address update message sent by the communication peer, where the address update message carries the correspondence between the flow identifier of the data stream and the update address of the communication peer used to transmit the data stream; and returns the address to the communication peer After the update responds successfully, transmit the data flow with the communication peer through the update address;
更新单元502，用于基于该对应关系，使用该更新地址更新传输该数据流使用的通信对端的原地址。The updating unit 502 is configured to use the updated address to update the original address of the communication peer used to transmit the data stream based on the correspondence.
较佳的，更新单元502，还用于根据地址更新消息中携带的安全关联更新信息，更新传输该数据流使用的原安全关联信息，得到更新后的安全关联信息；Preferably, the update unit 502 is further configured to update the original security association information used to transmit the data stream according to the security association update information carried in the address update message, to obtain updated security association information;
传输单元501，还用于在向通信对端返回安全关联信息更新成功响应后，使用更新后的安全关联信息传输该数据流。The transmission unit 501 is further configured to use the updated security association information to transmit the data stream after returning a successful security association information update response to the communication peer.
较佳的，传输单元501接收的地址更新消息中还携带该数据流的优先级信息和/或该更新地址的优先级信息；Preferably, the address update message received by the transmission unit 501 also carries the priority information of the data stream and/or the priority information of the updated address;
更新单元502，具体用于当地址更新消息中携带的与更新地址对应的数据流的流标识为多个时，根据该多个数据流的优先级信息，按照优先级从高到低的顺序更新传输该多个数据流使用的通信对端的原地址；和/或The update unit 502 is specifically configured to, when there are multiple stream identifiers of the data streams corresponding to the update address carried in the address update message, according to the priority information of the multiple data streams, update the streams in order of priority from high to low the original address of the correspondent used to transmit the plurality of data streams; and/or
当地址更新消息中携带的与该数据流的流标识对应的更新地址为多个时，根据该多个更新地址的优先级信息，选择优先级高的更新地址更新传输该数据流使用的通信对端的原地址。When there are multiple update addresses corresponding to the stream identifier of the data stream carried in the address update message, according to the priority information of the multiple update addresses, select an update address with a higher priority to update the communication pair used to transmit the data stream The original address of the end.
实施例4：Example 4:
基于同一发明构思，根据本发明上述实施例提供的数据流传输方法，相应地，本发明实施例4还提供了一种数据流传输系统，其结构示意图如图6所示，包括：多家乡主机601和通信对端602，其中：Based on the same inventive concept, according to the data stream transmission method provided by the above-mentioned embodiments of the present invention, correspondingly, Embodiment 4 of the present invention also provides a data stream transmission system, the schematic diagram of which is shown in Figure 6, including: multi-home host 601 and communication peer 602, wherein:
多家乡主机601，用于确定出请求重定向的数据流，以及传输该数据流使用的本多家乡主机601的更新地址；并向该数据流对应的通信对端602发送地址更新消息，地址更新消息中携带该数据流的流标识和该更新地址的对应关系；并在接收到通信对端602返回的地址更新成功响应后，通过该更新地址与通信对端602传输该数据流；The multi-home host 601 is used to determine the data stream that requests redirection, and the update address of the multi-home host 601 used to transmit the data stream; and send an address update message to the communication peer 602 corresponding to the data stream, and the address update Carrying the corresponding relationship between the flow identifier of the data flow and the update address in the message; and after receiving the address update success response returned by the communication peer 602, transmitting the data flow with the communication peer 602 through the update address;
通信对端602，用于接收多家乡主机601发送的地址更新消息；并基于该对应关系，使用该更新地址更新传输该数据流使用的多家乡主机601的原地址；并在向多家乡主机601返回地址更新成功响应后，通过该更新地址与多家乡主机601传输该数据流。The communication peer 602 is used to receive the address update message sent by the multi-home host 601; and based on the corresponding relationship, use the updated address to update the original address of the multi-home host 601 used to transmit the data stream; After returning the address updating success response, transmit the data flow with the multi-home host 601 through the updated address.
综上所述，本发明实施例提供的方案，包括：标识网络中的多家乡主机确定出请求重定向的数据流，以及传输该数据流使用的该多家乡主机的更新地址；并向该数据流对应的通信对端发送地址更新消息，该地址更新消息中携带该数据流的流标识和该更新地址的对应关系；并在接收到该通信对端返回的地址更新成功响应后，通过该更新地址与该通信对端传输该数据流。采用本发明实施例提供的方案，能够在标识网络中实现面向数据流的移动性管理。To sum up, the solution provided by the embodiment of the present invention includes: identifying the multi-homed host in the network to determine the data stream requesting redirection, and the update address of the multi-homed host used to transmit the data stream; The communication peer corresponding to the flow sends an address update message, which carries the corresponding relationship between the flow identifier of the data flow and the update address; and after receiving the address update success response returned by the communication peer, passes the update address to transmit the data stream with the correspondent. By adopting the solutions provided by the embodiments of the present invention, data flow-oriented mobility management can be realized in the identification network.
显然，本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样，倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010559786.2ACN102480468B (en) | 2010-11-25 | 2010-11-25 | A kind of data flow transmission method, Apparatus and system |
| Application Number | Priority Date | Filing Date | Title |
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| CN201010559786.2ACN102480468B (en) | 2010-11-25 | 2010-11-25 | A kind of data flow transmission method, Apparatus and system |
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| CN102480468A CN102480468A (en) | 2012-05-30 |
| CN102480468Btrue CN102480468B (en) | 2015-08-19 |
| Application Number | Title | Priority Date | Filing Date |
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| CN201010559786.2AActiveCN102480468B (en) | 2010-11-25 | 2010-11-25 | A kind of data flow transmission method, Apparatus and system |
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