WO2023124427A1 - 一种数据处理方法、网络节点和计算机可读存储介质 - Google Patents

一种数据处理方法、网络节点和计算机可读存储介质 Download PDF

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WO2023124427A1
WO2023124427A1 PCT/CN2022/125997 CN2022125997W WO2023124427A1 WO 2023124427 A1 WO2023124427 A1 WO 2023124427A1 CN 2022125997 W CN2022125997 W CN 2022125997W WO 2023124427 A1 WO2023124427 A1 WO 2023124427A1
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path
node
data flow
forwarding
identifier
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PCT/CN2022/125997
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English (en)
French (fr)
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钱勇
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中兴通讯股份有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/50—Routing or path finding of packets in data switching networks using label swapping, e.g. multi-protocol label switch [MPLS]
    • H04L45/507—Label distribution
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/38—Flow based routing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/50—Routing or path finding of packets in data switching networks using label swapping, e.g. multi-protocol label switch [MPLS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/74—Address processing for routing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/22—Parsing or analysis of headers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2212/00—Encapsulation of packets

Definitions

  • the present application relates to the technical field of communications, and in particular to a data processing method, a network node and a computer-readable storage medium.
  • SRv6 Segment Routing IPv6
  • SDN Software Defined Network
  • Nodes in the SRv6 forwarding domain are divided into head nodes, end nodes, and tail nodes.
  • the head node can obtain the ID information of the forwarding path, and can perform traffic statistics on data based on the ID information of the data forwarding path.
  • the end node and the tail node can only obtain the SID list information, but cannot obtain the ID information of the forwarding path.
  • the stack depth of the SID list is uncertain, so the SID list cannot be used to indicate a certain forwarding path instead of the ID information of the forwarding path.
  • the purpose of the embodiments of the present application is to provide a data processing method, a network node, and a computer-readable storage medium, which are used to enable nodes other than the head node in the forwarding path to obtain the path identification of the data flow, and then perform path identification based on the data flow. processing.
  • the embodiment of the present application provides a data processing method applied to the head node in the forwarding path, including: obtaining the path node sequence and the path identifier of the forwarding path of the data flow; the path identifier is generated by the network controller And issued to the head node or generated by the head node, and the path identifier is used for the nodes other than the head node in the forwarding path to perform traffic management according to the path identifier; the data flow, the path node sequence and the path identifier of the forwarding path are encapsulated into a data flow message, And send out the data flow message.
  • the embodiment of the present application provides a data processing method applied to the intermediate nodes in the forwarding path, including: receiving the data flow message sent by the upstream node; wherein, the data flow message carries the path node of the forwarding path Sequence and path identification; perform traffic management according to the path identification of the data flow message; identify the downstream node of the forwarding path of the data flow message according to the path node sequence, and update the path node sequence in the data flow message; update the updated data Flow packets are sent to downstream nodes.
  • the embodiment of the present application provides a network node, the network node is the head node in the forwarding path, including: a path information acquisition module, used to acquire the path node sequence and path identifier of the forwarding path of the data flow;
  • the path identifier is generated by the network controller and sent to the head node or generated by the head node, and the path identifier is used for nodes other than the head node in the forwarding path to perform traffic management according to the path identifier;
  • the packet encapsulation module is used to transfer the data flow, forwarding path
  • the path node sequence and path identifier are encapsulated into a data flow message, and the data flow message is sent out.
  • the embodiment of the present application provides a network node, the network node is an intermediate node in the forwarding path, including: a message receiving module, used to receive the data flow message sent by the upstream node; wherein, the data flow The message carries the path node sequence and path identifier of the forwarding path; the execution module is used to perform traffic management according to the path identifier of the data flow message; the update module is used to identify the downstream node of the forwarding path of the data flow message according to the path node sequence , and update the path node sequence in the data flow message; the message sending module is used to send the updated data flow message to the downstream node.
  • the embodiment of the present application also provides a network node, including: at least one processor; and a memory connected to the at least one processor in communication; wherein, the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by at least one processor. Executed by one processor, so that at least one processor can execute the above-mentioned data processing method applied to the head node in the forwarding path, or execute the above-mentioned data processing method applied to the intermediate node in the forwarding path.
  • Embodiments of the present application also provide a computer-readable storage medium storing a computer program.
  • the computer program is executed by a processor, the above-mentioned data processing method applied to the head node in the forwarding path is implemented, or the above-mentioned application to A data processing method of an intermediate node in a forwarding path.
  • the head node in the forwarding path obtains the path node sequence and the path identifier of the forwarding path of the data flow.
  • the path identifier is generated by the network controller and issued to the head node or generated by the head node, and the path identifier can be used by nodes other than the head node in the forwarding path to perform traffic management according to the path identifier.
  • the head node further encapsulates the data flow, the path node sequence of the forwarding path, and the path identifier into a data flow packet, and sends the data flow packet.
  • a node other than the head node in the forwarding path When a node other than the head node in the forwarding path receives a data flow message, it can obtain the data flow encapsulated in the message, the path node sequence and path identifier of the forwarding path, and then process the data flow based on the path identifier. And based on the path node sequence, the data flow message is continuously sent forward according to the correct forwarding path.
  • FIG. 1 is a flowchart of a data processing method applied to a head node in a forwarding path according to an embodiment of the present application
  • FIG. 2 is a schematic diagram of a scenario of a data flow message transmission path
  • FIG. 3 is a schematic diagram of the SRH header format of a data flow message according to an embodiment of the present application
  • Fig. 4 is a schematic diagram of the format of the IPv6 header of the data flow message according to an embodiment of the present application.
  • Fig. 5 is a schematic diagram of applying a traditional method to process a data stream and forward a data stream message
  • FIG. 6 is a schematic diagram of processing a data flow and forwarding a data flow message according to an embodiment of the present application
  • FIG. 7 is a flow chart of a data processing method applied to a node other than the head node in the forwarding path according to an embodiment of the present application;
  • FIG. 8 is a schematic structural diagram of a network node according to an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of a network node according to another implementation manner of the present application.
  • Fig. 10 is a schematic structural diagram of a network node according to another implementation manner of the present application.
  • An embodiment of the present application relates to a data processing method applied to a head node in a forwarding path, and a specific process is shown in FIG. 1 .
  • the data processing method includes: obtaining the path node sequence and path identifier of the forwarding path of the data flow; the path identifier is generated by the network controller and issued to the head node or generated by the head node, and the path identifier is used for forwarding
  • the nodes other than the head node in the path perform traffic management according to the path identifier; the data flow, the path node sequence and the path identifier of the forwarding path are encapsulated into a data flow message, and the data flow message is sent out.
  • Step 101 obtain the path node sequence and path identifier of the forwarding path of the data stream; the path identifier is generated by the network controller and sent to the head node or generated by the head node, and the path identifier is used by the nodes other than the head node in the forwarding path according to the path identifier For traffic management.
  • the head node in the forwarding path obtains the path node sequence and path identifier of the forwarding path of the data flow.
  • the forwarding path of the data flow is generally calculated and generated by the network controller for the data flow according to the service requirements of the data flow.
  • the path node sequence is a sequence formed by integrating identification information of each node on the forwarding path of the data flow.
  • the identification information of each involved node may be the SID of the node.
  • the traffic management involved in this step may include traffic statistics, traffic rate limiting, and other processing that can be performed on the data stream based on the path identifier.
  • the path identifier is used to uniquely determine the specific forwarding path of the data flow message, so that the nodes in the forwarding domain can process the data flow according to the forwarding path.
  • the path identifier can be generated by the network controller and delivered to the head node or generated by the head node.
  • the network controller can generate a path identifier for the data flow according to the forwarding path calculated for the data flow, which can ensure the uniqueness of the path identifier in the forwarding domain. Avoid confusion caused by assigning the same path identifier to different forwarding paths, and avoid errors such as traffic statistics caused by nodes due to forwarding path confusion.
  • obtaining the path identifier of the data flow may include: selecting the path identifier of the forwarding path of the data flow in the path identifier list corresponding to the head node according to the forwarding path of the data flow; Wherein, the path identifier list corresponding to the head node is different from the path identifier list corresponding to other head nodes, and the path identifier of the forwarding path is different from the path identifiers of other forwarding paths.
  • the head node selects the path identifier of the forwarding path for the data flow from the corresponding path identifier list. It can prevent different head nodes from assigning the same path identifier to different paths, resulting in non-head node nodes being unable to perform traffic statistics and other processing.
  • Step 102 encapsulating the data flow, the path node sequence of the forwarding path and the path identifier into a data flow message, and sending the data flow message.
  • the head node in the forwarding path encapsulates the data flow, the path node sequence and the path identifier of the forwarding path into a data flow packet, and sends the data flow packet to the next node according to the forwarding path of the data flow.
  • a node other than the head node in the forwarding path receives the data flow message, it can obtain the data encapsulated in the message and the path node sequence and path identifier of the forwarding path, and then process the data based on the path identifier. And the data stream can continue to be sent forward.
  • the data stream message includes an IPv6 header and an SRH header
  • the path node sequence is encapsulated in the SRH header of the data stream message
  • the path identifier is encapsulated in a preset vacancy of the IPv6 header of the data stream message field or in a preset vacant field of the SRH header
  • the path identifier is encapsulated in the SRH header of the data flow message, and the encapsulation format of the path identifier is the same as that of the path node sequence.
  • the format of the SRH header involved may be as shown in FIG. 3 .
  • the encapsulation format of the path identifier is the same as the encapsulation format of the path node sequence.
  • the encapsulation format of the path node sequence involved here can refer to the encapsulation format of SID[0] or SID[n] shown in Figure 3, and the length can be set to 128 bit.
  • This way of encapsulating the path identifier can enable the bits occupied by the path identifier to be used to store the identifier information of the nodes in the increased path when the path node sequence needs to be expanded, which can improve the flexibility of the encapsulation format of the data flow message sex.
  • the format of the involved IPv6 header can be as shown in Figure 4
  • the involved SRH header format can also refer to FIG. 3 .
  • the encapsulation method in the preset vacant field of the data flow message that is, the encapsulation method in the existing field, can reduce the packet encapsulation overhead and reduce the network bandwidth consumption.
  • the preset vacant fields of the IPv6 header involved in this example may include: the Flow Label (Flow Label) field of the IPv6 header (see Figure 4); the preset vacant fields of the SRH header may include: the tag of the SRH header field (see Figure 3).
  • the Flags field in the SRH header of the data flow packet may also be used as a flag bit to indicate whether the path identifier is encapsulated in the data flow packet.
  • the flag field involved in this example refer to the Flags field in Figure 3.
  • the flag bit set in this example will not add additional packet encapsulation overhead to the packet encapsulation, and can enable the nodes in the forwarding path that are not the head node to determine whether the data stream packet is encapsulated according to whether the flag bit is set or not. Path ID.
  • FIG. 5 a schematic diagram of applying a traditional method to process data streams and forward data stream packets is shown in FIG. 5 . It can be seen that although nodes 2 and 3 can forward packets, because the packets do not contain relevant information that can uniquely determine the path, it is difficult for nodes 2 and 3 to perform traffic statistics and other processing on the transmitted data flow.
  • FIG. 6 A schematic diagram of processing a data flow and forwarding a data flow packet according to the data processing method provided in this embodiment is shown in FIG. 6 .
  • the transmission path of the data stream packet shown in FIG. 6 is the same as that in FIG. 5 . It can be seen that in the message transmitted in the transmission path in Figure 6, compared with the traditional data processing method, there are more path identification information that can represent the transmission path of the data flow, and can represent whether the path is encapsulated in the data flow packet. Identifier flag.
  • the head node in the forwarding path obtains the path node sequence and the path identifier of the forwarding path of the data flow.
  • the path identifier is generated by the network controller and issued to the head node or generated by the head node, and the path identifier can be used by nodes other than the head node in the forwarding path to perform traffic management according to the path identifier.
  • the head node further encapsulates the data flow, the path node sequence of the forwarding path, and the path identifier into a data flow packet, and sends the data flow packet.
  • a node other than the head node in the forwarding path When a node other than the head node in the forwarding path receives a data flow message, it can obtain the data flow encapsulated in the message, the path node sequence and path identifier of the forwarding path, and then process the data flow based on the path identifier. And based on the path node sequence, the data flow message is continuously sent forward according to the correct forwarding path.
  • Another embodiment of the present application relates to a data processing method applied to an intermediate node in a forwarding path.
  • the data processing method includes: receiving a data flow message sent by an upstream node; wherein, the data flow message carries a path node sequence and a path identifier of a forwarding path; performing traffic flow according to the path identifier of the data flow message Management: identify the downstream node of the forwarding path of the data flow message according to the path node sequence, and update the path node sequence in the data flow message; send the updated data flow message to the downstream node.
  • Step 201 receiving a data flow message sent by an upstream node; wherein, the data flow message carries a path node sequence and a path identifier of a forwarding path.
  • the intermediate node receives a data flow packet sent by an upstream node in the forwarding path and carrying a sequence of path nodes and a path identifier of the forwarding path. Therefore, when the intermediate node receives this kind of data flow message, it can parse out the data flow and the path node of the forwarding path of the data flow that is initially encapsulated in the data flow message by the head node and used to guide the forwarding of the message hop by hop Sequence, and the path identifier used to uniquely determine the forwarding path of the data flow message.
  • the head node when encapsulating the data stream message, selects a flag bit in the message to indicate whether a path identifier is encapsulated in the data stream message.
  • the intermediate node can parse out the flag bit used to indicate whether the path identifier is encapsulated in the data stream message in the data stream message; if the flag bit is set, the data stream message can be parsed out Path ID of the flow's forwarding path.
  • Step 202 perform traffic management according to the path identifier of the data flow message.
  • the intermediate node performs traffic management based on the path identifier of the forwarding path of the data flow in the data flow message. Since the path node sequence of the data flow forwarding path cannot uniquely determine the specific forwarding path, the intermediate node can only determine the forwarding path of the data flow message and perform traffic management only by obtaining the path identifier of the forwarding path.
  • the traffic management involved here may include at least one of the following: traffic statistics, traffic rate limiting, and other processing that can be performed on data streams based on path identifiers.
  • Step 203 Identify the downstream node of the forwarding path according to the path node sequence, and update the path node sequence in the data flow message.
  • the intermediate node can identify the downstream node of the forwarding path of the data flow message according to the path node sequence, so as to forward the data flow message according to the correct forwarding path.
  • the intermediate node in the forwarding path further updates the path node sequence in the data flow message, specifically, the identifier of the intermediate node where the message is located may be deleted from the path node sequence.
  • Step 204 sending the updated data flow message to the downstream node.
  • the updated data flow message involved in this step can actually also be understood as a data flow message re-encapsulated by the intermediate node.
  • the intermediate node continues to forward the data flow message according to the preset forwarding path.
  • the intermediate node in the forwarding path first receives the data flow message sent by the upstream node and carrying the path node sequence and path identifier of the forwarding path. Furthermore, the intermediate node can perform traffic management according to the path identifier in the data flow message. It is also possible to identify the downstream node of the forwarding path of the data flow message according to the path node sequence, and send the updated data flow message to the downstream node according to the correct forwarding path of the data flow.
  • FIG. 8 Another embodiment of the present application relates to a network node, which is the head node in the forwarding path.
  • the structural diagram is shown in FIG. 8 , including:
  • the path information acquisition module 301 is used to obtain the path node sequence and path identifier of the forwarding path of the data flow; the path identifier is generated by the network controller and sent to the head node or generated by the head node, and the path identifier is used for non-head nodes in the forwarding path
  • the nodes perform traffic management according to the path identification;
  • the packet encapsulation module 302 is configured to encapsulate the data flow, the path node sequence and the path identifier of the forwarding path into a data flow packet, and send the data flow packet.
  • the network node provided in this embodiment can acquire the path node sequence and path identifier of the forwarding path of the data flow.
  • the path identifier is generated by the network controller and issued to the head node or generated by the head node, and the path identifier can be used by nodes other than the head node in the forwarding path to perform traffic management according to the path identifier.
  • the head node further encapsulates the data flow, the path node sequence of the forwarding path, and the path identifier into a data flow packet, and sends the data flow packet.
  • a node other than the head node in the forwarding path When a node other than the head node in the forwarding path receives a data flow message, it can obtain the data flow encapsulated in the message, the path node sequence and path identifier of the forwarding path, and then process the data flow based on the path identifier. And based on the path node sequence, the data flow message is continuously sent forward according to the correct forwarding path.
  • FIG. 9 Another embodiment of the present application relates to a network node, which is an intermediate node in the forwarding path.
  • the schematic diagram of the structure is shown in FIG. 9 , including:
  • a message receiving module 401 configured to receive a data flow message sent by an upstream node; wherein, the data flow message carries a path node sequence and a path identifier of a forwarding path;
  • An execution module 402 configured to perform traffic management according to the path identifier of the data flow message
  • An update module 403, configured to identify the downstream node of the forwarding path according to the path node sequence, and update the path node sequence in the data flow message;
  • a message sending module 404 configured to send the updated data flow message to a downstream node.
  • the network node provided in this embodiment can receive a data flow packet sent by an upstream node and carrying a path node sequence and a path identifier of a forwarding path. Furthermore, the intermediate node can perform traffic management according to the path identifier in the data flow message. It is also possible to identify the downstream node of the forwarding path of the data flow message according to the path node sequence, and send the updated data flow message to the downstream node according to the correct forwarding path of the data flow.
  • Each module involved in the above-mentioned path identification device set in the head node in the forwarding path is a logical module.
  • a logical unit can be a physical unit or a part of a physical unit. Combination of multiple physical units. Units that are not closely related to solving the technical problem proposed in this application are not introduced here, but this does not mean that there are no other units in the above-mentioned path identification device.
  • the embodiment of the present application also provides a network node, as shown in FIG. 10 , including at least one processor 501; and a memory 502 communicatively connected to at least one processor 501; wherein, the memory 502 stores information that can be processed by at least one The instruction executed by the processor 501, the instruction is executed by at least one processor 501, so that at least one processor 501 can execute the above-mentioned data processing method applied to the head node in the forwarding path, or execute the above-mentioned data processing method applied to the non-head node in the forwarding path Node's node's data processing method.
  • the memory 502 and the processor 501 are connected by a bus, and the bus may include any number of interconnected buses and bridges, and the bus connects one or more processors 501 and various circuits of the memory 502 together.
  • the bus may also connect together various other circuits such as peripherals, voltage regulators, and power management circuits, all of which are well known in the art and therefore will not be further described herein.
  • the bus interface provides an interface between the bus and the transceivers.
  • a transceiver may be a single element or multiple elements, such as multiple receivers and transmitters, providing means for communicating with various other devices over a transmission medium.
  • the data processed by the processor 501 is transmitted on the wireless medium through the antenna, and further, the antenna also receives the data and transmits the data to the processor 501 .
  • Processor 501 is responsible for managing the bus and general processing, and may also provide various functions including timing, peripheral interface, voltage regulation, power management and other control functions. And the memory 502 may be used to store data used by the processor 501 when performing operations.
  • Embodiments of the present application also provide a computer-readable storage medium storing a computer program.
  • the computer program When the computer program is executed by the processor, it realizes the above data processing method applied to the head node in the forwarding path, or realizes the above data processing method applied to the nodes other than the head node in the forwarding path.
  • a storage medium includes several instructions to make a device (which can be A single chip microcomputer, a chip, etc.) or a processor (processor) executes all or part of the steps of the methods in various embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, referred to as "ROM”), random access memory (Random Access Memory, referred to as "RAM”), magnetic disk or optical disc, etc.
  • ROM read-only memory
  • RAM random access memory
  • magnetic disk or optical disc etc.

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Abstract

本申请公开了一种数据处理方法、网络节点和计算机可读存储介质，该数据处理方法应用于转发路径中的头节点，包括：获取数据流的转发路径的路径节点序列和路径标识；路径标识由网络控制器生成并下发给头节点或者由头节点生成，且路径标识供转发路径中非头节点的节点根据路径标识进行流量管理；将数据流、转发路径的路径节点序列和路径标识封装成数据流报文，并将数据流报文发送出去。

Description

一种数据处理方法、网络节点和计算机可读存储介质
相关申请
本申请要求于2021年12月27日申请的、申请号为202111617040.7的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其是涉及一种数据处理方法、网络节点和计算机可读存储介质。
背景技术
SRv6(Segment Routing IPv6)是基于IPv6转发平面的段路由技术，在近年来受到通信技术领域越来越多的关注，被定位是软件定义网络(Software Defined Network，简称“SDN”)部署的重要技术之一。在SRv6转发架构中，在用户提交如低时延、高带宽等业务需求后，控制器根据网络中各个网元、链路域的运行情况提前计算出一条转发路径，当数据进入SRv6转发域时，将根据数据的转发路径提前计算出的段路由标识(Segment Routing ID，简称“SID”)列表封装在数据中，用于逐跳指导报文转发。
SRv6转发域中的节点分为头节点、端节点和尾节点，头节点能够获取转发路径的ID信息，可以对数据进行流量统计等基于数据转发路径的ID信息才能够进行的处理。但是端节点和尾节点只能获取SID列表信息，而不能获取转发路径的ID信息。且SID列表的栈深不确定，因而无法以SID列表代替转发路径的ID信息用于指示某条转发路径。
因此，SRv6转发域中的端节点以及尾节点，无法实现基于路径处理数据的相关功能，这给网络运维带来了极大的不便。
发明内容
本申请实施方式的目的在于提供一种数据处理方法、网络节点和计算机可读存储介质，用以使转发路径中非头节点的节点获取数据流的路径标识，进而能够对数据流进行基于路径标识的处理。
为了解决上述问题，本申请的实施方式提供了一种应用于转发路径中的头节点的数据处理方法，包括：获取数据流的转发路径的路径节点序列和路径标识；路径标识由网络控制器生成并下发给头节点或者由头节点生成，且路径标识供转发路径中非头节点的节点根据路径标识进行流量管理；将数据流、转发路径的路径节点序列和路径标识封装成数据流报文，并将数据流报文发送出去。
为了解决上述问题，本申请的实施方式提供了一种应用于转发路径中中间节点的数据处理方法，包括：接收上游节点发送的数据流报文；其中，数据流报文携带转发路径的路径节点序列和路径标识；根据数据流报文的路径标识进行流量管理；根据路径节点序列识别数据流报文的转发路径的下游节点，并更新数据流报文中的路径节点序列；将更新后的数据流报文发送至下游节点。
为了解决上述问题，本申请的实施方式提供了一种网络节点，网络节点为转发路径中的头节点，包括：路径信息获取模块，用于获取数据流的转发路径的路径节点序列和路径标识；路径标识由网络控制器生成并下发给头节点或者由头节点生成，且路径标识供转发路径中非 头节点的节点根据路径标识进行流量管理；报文封装模块，用于将数据流、转发路径的路径节点序列和路径标识封装成数据流报文，并将数据流报文发送出去。
为了解决上述问题，本申请的实施方式提供了一种网络节点，网络节点为转发路径中的中间节点，包括：报文接收模块，用于接收上游节点发送的数据流报文；其中，数据流报文携带转发路径的路径节点序列和路径标识；执行模块，用于根据数据流报文的路径标识进行流量管理；更新模块，用于根据路径节点序列识别数据流报文的转发路径的下游节点，并更新数据流报文中的路径节点序列；报文发送模块，用于将更新后的数据流报文发送至下游节点。
本申请的实施方式还提供了一种网络节点，包括：至少一个处理器；以及，与至少一个处理器通信连接的存储器；其中，存储器存储有可被至少一个处理器执行的指令，指令被至少一个处理器执行，以使至少一个处理器能够执行上述的应用于转发路径中的头节点的数据处理方法，或执行上述的应用于转发路径中的中间节点的数据处理方法。
本申请的实施方式还提供了一种存储有计算机程序的计算机可读存储介质，计算机程序被处理器执行时实现上述的应用于转发路径中的头节点的数据处理方法，或实现上述的应用于转发路径中的中间节点的数据处理方法。
在本申请的实施方式中，转发路径中的头节点获取数据流的转发路径的路径节点序列和路径标识。其中路径标识由网络控制器生成并下发给头节点或者由头节点生成，且路径标识能够供转发路径中非头节点的节点根据路径标识进行流量管理。头节点进而将数据流、转发路径的路径节点序列和路径标识封装成数据流报文，并将数据流报文发送出去。使得转发路径中非头节点的节点在接收到数据流报文时，能够获取报文中封装的数据流、转发路径的路径节点序列和路径标识，进而能够对数据流进行基于路径标识的处理，并基于路径节点序列按照正确转发路径将数据流报文继续向前发送。
附图说明
一个或多个实施方式通过与之对应的附图中的图片进行示例性说明，这些示例性说明并不构成对实施方式的限定，附图中具有相同参考数字标号的元件表示为类似的元件，除非有特别申明，附图中的图不构成比例限制。
图1是根据本申请一实施方式中的应用于转发路径中的头节点的数据处理方法流程图；
图2是一种数据流报文传输路径的场景示意图；
图3是根据本申请一实施方式中的数据流报文的SRH头部格式示意图；
图4是根据本申请一实施方式中的数据流报文的IPv6头部格式示意图；
图5是一种应用传统方法对数据流进行处理并对数据流报文进行转发的示意图；
图6是根据本申请一实施方式中的对数据流进行处理并对数据流报文进行转发的示意图；
图7是根据本申请一实施方式中的应用于转发路径中非头节点的节点的数据处理方法流程图；
图8是根据本申请一实施方式中的网络节点的结构示意图；
图9是根据本申请另一实施方式中的网络节点的结构示意图；
图10是根据本申请又一实施方式中的网络节点的结构示意图。
具体实施方式
为使本申请实施方式的目的、技术方案和优点更加清楚，下面将结合附图对本申请的各 实施方式进行详细的阐述。然而，本领域的普通技术人员可以理解，在本申请各实施方式中，为了使读者更好地理解本申请而提出了许多技术细节。但是，即使没有这些技术细节和基于以下各实施方式的种种变化和修改，也可以实现本申请所要求保护的技术方案。以下各个实施方式的划分是为了描述方便，不应对本申请的具体实现方式构成任何限定，各个实施方式在不矛盾的前提下可以相互结合相互引用。
本申请的一实施方式涉及一种应用于转发路径中的头节点的数据处理方法，具体流程如图1所示。
在本实施方式中，该数据处理方法，包括：获取数据流的转发路径的路径节点序列和路径标识；路径标识由网络控制器生成并下发给头节点或者由头节点生成，且路径标识供转发路径中非头节点的节点根据路径标识进行流量管理；将数据流、转发路径的路径节点序列和路径标识封装成数据流报文，并将数据流报文发送出去。
在如图2所示的报文转发路径场景中，由于路径一(节点1、节点2和节点3依次连接组成的传输路径)和路径二(节点1、节点2、节点3和节点4依次连接组成的传输路径)均经过节点2，而节点2难以根据报文中已有的信息确定接收的数据流报文的传输路径，因此节点2对按照不同传输路径传输的数据流报文进行流量统计等处理时，可能会由于混乱而出错。因此本申请的发明人提出了本实施方式涉及的数据处理方法。
下面对本实施方式中的数据处理方法的实现细节进行具体的说明，以下内容仅为方便理解本方案的实现细节，并非实施本方案的必须。具体流程如图1所示，可包括如下步骤：
步骤101，获取数据流的转发路径的路径节点序列和路径标识；路径标识由网络控制器生成并下发给头节点或者由头节点生成，且路径标识供转发路径中非头节点的节点根据路径标识进行流量管理。
在本步骤中，转发路径中的头节点获取数据流的转发路径的路径节点序列和路径标识。数据流的转发路径一般由网络控制器根据数据流的业务需求为数据流计算生成。路径节点序列为将数据流的转发路径上的每一个节点的标识信息整合形成的序列。其中，涉及的每一个节点的标识信息可以是节点的SID。本步骤中涉及的流量管理可以包括流量统计、流量限速以及基于路径标识能够对数据流进行的其他处理。
路径标识用于唯一确定数据流报文的具体转发路径，供转发域内的节点根据该转发路径对数据流进行相关处理。路径标识可以由网络控制器生成并下发给头节点或者由头节点生成。在路径标识由网络控制器生成并下发给头节点的情况下，网络控制器能够根据为数据流计算得到的转发路径为该数据流生成路径标识，能够保证路径标识在转发域内的唯一性，避免同一路径标识分配给不同转发路径而导致的混乱，且避免节点由于转发路径混乱导致的流量统计等错误。
在一个例子中，在路径标识由头节点生成的情况下，获取数据流的路径标识可以包括：根据数据流的转发路径，在头节点对应的路径标识列表中选取数据流的转发路径的路径标识；其中，头节点对应的路径标识列表不同于其他头节点对应的路径标识列表，转发路径的路径标识不同于其他转发路径的路径标识。在本例中，头节点在对应的路径标识列表中为数据流选取转发路径的路径标识。能够避免不同头节点为不同路径分配同一路径标识，而导致非头节点的节点无法进行流量统计等处理。
步骤102，将数据流、转发路径的路径节点序列和路径标识封装成数据流报文，并将数 据流报文发送出去。
在本步骤中，转发路径中的头节点将数据流、转发路径的路径节点序列和路径标识封装成数据流报文，并将数据流报文按照数据流的转发路径向下一节点发送。使得转发路径中非头节点的节点，在接收到该数据流报文时，能够获取报文中封装的数据以及转发路径的路径节点序列和路径标识，进而能够对数据进行基于路径标识的处理，且能够将数据流继续向前发送。
在一个例子中，数据流报文包括IPv6头部和SRH头部，且路径节点序列封装在数据流报文的SRH头部中；路径标识封装在数据流报文的IPv6头部的预设空余字段中或SRH头部的预设空余字段中；或者，路径标识封装在数据流报文的SRH头部中，且路径标识的封装格式与路径节点序列的封装格式相同。
在本例中，在路径标识封装在数据流报文的SRH头部中的情况下，涉及的SRH头部格式可以如图3所示。路径标识的封装格式与路径节点序列的封装格式相同，此处涉及的路径节点序列的封装格式可以参见图3中示出的SID[0]或SID[n]的封装格式，长度可以设置为128比特。这种对路径标识的封装方式能够使得路径标识所占用的比特可以在路径节点序列需要扩展的情况下，用于存放增加的路径中的节点的标识信息，能够提高数据流报文封装格式的灵活性。
在本例中，在将路径标识封装在数据流报文的IPv6头部的预设空余字段中或SRH头部的预设空余字段中的情况下，涉及的IPv6头部格式可以如图4所示，涉及的SRH头部格式也可以参见图3。相比上述路径标识的封装方式，封装在数据流报文的预设空余字段，即已有字段中的封装方式，能够减少报文封装开销，且减少网络宽带消耗。
本例中涉及的IPv6头部的预设空余字段可以包括：IPv6头部的流标签(Flow Label)字段(请参见图4)；SRH头部的预设空余字段可以包括：SRH头部的tag字段(请参见图3)。
在另一个例子中，还可以将数据流报文的SRH头部的Flags字段作为标志位，用于指示数据流报文中是否封装有路径标识。本例涉及的标志位字段请参见图3中的Flags字段。本例中设置的标志位不会对报文封装增加额外的报文封装开销，且能够使得转发路径中非头节点的节点，能够根据该标志位是否置位确定数据流报文中是否封装有路径标识。
在SRV6转发域中，应用传统方法对数据流进行处理并对数据流报文进行转发的示意图如图5所示。可以看出节点2和节点3虽然能够进行报文转发，但是由于报文中不包含能够唯一确定路径的相关信息，因而节点2和节点3难以对传输的数据流进行流量统计等处理。
按照本实施方式提供的数据处理方法对数据流进行处理并对数据流报文进行转发的示意图如图6所示。图6中示出的数据流报文的传输路径与图5中相同。可以看出，图6中在传输路径中进行传输的报文中相比传统的数据处理方法，多了能够表征数据流传输路径的路径标识信息、以及能够表征数据流报文中是否封装有路径标识的标志位。
在本实施方式中，转发路径中的头节点获取数据流的转发路径的路径节点序列和路径标识。其中路径标识由网络控制器生成并下发给头节点或者由头节点生成，且路径标识能够供转发路径中非头节点的节点根据路径标识进行流量管理。头节点进而将数据流、转发路径的路径节点序列和路径标识封装成数据流报文，并将数据流报文发送出去。使得转发路径中非头节点的节点在接收到数据流报文时，能够获取报文中封装的数据流、转发路径的路径节点序列和路径标识，进而能够对数据流进行基于路径标识的处理，并基于路径节点序列按照正 确转发路径将数据流报文继续向前发送。
本申请的另一实施方式涉及一种应用于转发路径中的中间节点的数据处理方法。
在本实施方式中，该数据处理方法，包括：接收上游节点发送的数据流报文；其中，数据流报文携带转发路径的路径节点序列和路径标识；根据数据流报文的路径标识进行流量管理；根据路径节点序列识别数据流报文的转发路径的下游节点，并更新数据流报文中的路径节点序列；将更新后的数据流报文发送至下游节点。
下面对本实施方式中的数据处理方法的实现细节进行具体的说明，以下内容仅为方便理解本方案的实现细节，并非实施本方案的必须。具体流程如图7所示，可包括如下步骤：
步骤201，接收上游节点发送的数据流报文；其中，数据流报文携带转发路径的路径节点序列和路径标识。
在本步骤中，中间节点接收转发路径中的上游节点发送的、携带有转发路径的路径节点序列和路径标识的数据流报文。因而中间节点能够在接收到此类数据流报文时，解析出数据流，以及最初由头节点封装在数据流报文中的，用于逐跳指导报文转发的数据流的转发路径的路径节点序列，以及用于唯一确定数据流报文转发路径的路径标识。
在一个例子中，头节点在封装数据流报文时，在报文中选取一标志位用于指示数据流报文中是否封装有路径标识。在本例中，中间节点可以在数据流报文中解析出用于指示数据流报文中是否封装有路径标识的标志位；在标志位置位的情况下，在数据流报文中解析出数据流的转发路径的路径标识。
步骤202，根据数据流报文的路径标识进行流量管理。
在本步骤中，中间节点基于数据流报文中的数据流的转发路径的路径标识进行流量管理。由于数据流的转发路径的路径节点序列无法唯一确定具体的转发路径，因此中间节点只有获取转发路径的路径标识才能够确定数据流报文的转发路径，并进行流量管理。此处涉及的流量管理可以包括以下至少其中之一：流量统计、流量限速以及基于路径标识能够对数据流进行的其他处理。
步骤203，根据路径节点序列识别转发路径的下游节点，并更新数据流报文中的路径节点序列。
在本步骤中，中间节点根据路径节点序列能够识别数据流报文的转发路径的下游节点，以实现将数据流报文按照正确的转发路径进行转发。转发路径中的中间节点进一步地将数据流报文中的路径节点序列进行更新，具体可以是将报文所在的中间节点的标识在路径节点序列中删除。
步骤204，将更新后的数据流报文发送至下游节点。
本步骤中涉及的更新后的数据流报文实际上也可以理解为是由中间节点进行了重新封装的数据流报文。在本步骤中，中间节点将数据流报文按照预设的转发路径继续进行转发。
在本实施方式中，转发路径中的中间节点首先接收上游节点发送的、携带转发路径的路径节点序列和路径标识的数据流报文。进而中间节点能够根据数据流报文中的路径标识进行流量管理。还能够根据路径节点序列识别数据流报文的转发路径的下游节点，将更新后的数据流报文按照该数据流的正确转发路径发送至该下游节点。
本申请的另一实施方式涉及一种网络节点，为转发路径中的头节点，结构示意图如图8所示，包括：
路径信息获取模块301，用于获取数据流的转发路径的路径节点序列和路径标识；路径标识由网络控制器生成并下发给头节点或者由头节点生成，且路径标识供转发路径中非头节点的节点根据路径标识进行流量管理；
报文封装模块302，用于将数据流、转发路径的路径节点序列和路径标识封装成数据流报文，并将数据流报文发送出去。
本实施方式提供的网络节点能够获取数据流的转发路径的路径节点序列和路径标识。其中路径标识由网络控制器生成并下发给头节点或者由头节点生成，且路径标识能够供转发路径中非头节点的节点根据路径标识进行流量管理。头节点进而将数据流、转发路径的路径节点序列和路径标识封装成数据流报文，并将数据流报文发送出去。使得转发路径中非头节点的节点在接收到数据流报文时，能够获取报文中封装的数据流、转发路径的路径节点序列和路径标识，进而能够对数据流进行基于路径标识的处理，并基于路径节点序列按照正确转发路径将数据流报文继续向前发送。
本申请的另一实施方式涉及一种网络节点，为转发路径中的中间节点，结构示意图如图9所示，包括：
报文接收模块401，用于接收上游节点发送的数据流报文；其中，数据流报文携带转发路径的路径节点序列和路径标识；
执行模块402，用于根据数据流报文的路径标识进行流量管理；
更新模块403，用于根据路径节点序列识别转发路径的下游节点，并更新数据流报文中的路径节点序列；
报文发送模块404，用于将更新后的数据流报文发送至下游节点。
本实施方式提供的网络节点能够接收上游节点发送的、携带转发路径的路径节点序列和路径标识的数据流报文。进而中间节点能够根据数据流报文中的路径标识进行流量管理。还能够根据路径节点序列识别数据流报文的转发路径的下游节点，将更新后的数据流报文按照该数据流的正确转发路径发送至该下游节点。
上述设置在转发路径中的头节点中的路径标识装置中涉及的各模块均为逻辑模块，在实际应用中，一个逻辑单元可以是一个物理单元，也可以是一个物理单元的一部分，还可以以多个物理单元的组合实现。此处并没有将与解决本申请所提出的技术问题关系不太密切的单元引入，但这并不表明上述路径标识装置中不存在其它的单元。
本申请的实施方式还提供一种网络节点，如图10所示，包括至少一个处理器501；以及，与至少一个处理器501通信连接的存储器502；其中，存储器502存储有可被至少一个处理器501执行的指令，指令被至少一个处理器501执行，以使至少一个处理器501能够执行上述的应用于转发路径中的头节点的数据处理方法，或执行上述的应用于转发路径中非头节点的节点的数据处理方法。
其中，存储器502和处理器501采用总线方式连接，总线可以包括任意数量的互联的总线和桥，总线将一个或多个处理器501和存储器502的各种电路连接在一起。总线还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路连接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口在总线和收发机之间提供接口。收发机可以是一个元件，也可以是多个元件，比如多个接收器和发送器，提供用于在传输介质上与各种其他装置通信的单元。经处理器501处理的数据通过天线在无线介质上进行传输， 进一步，天线还接收数据并将数据传送给处理器501。
处理器501负责管理总线和通常的处理，还可以提供各种功能，包括定时，外围接口，电压调节、电源管理以及其他控制功能。而存储器502可以被用于存储处理器501在执行操作时所使用的数据。
上述产品可执行本申请实施方式所提供的方法，具备执行方法相应的功能模块和有益效果，未在本实施方式中详尽描述的技术细节，可参见本申请实施方式所提供的方法。
本申请的实施方式还提供一种计算机可读存储介质，存储有计算机程序。计算机程序被处理器执行时实现上述的应用于转发路径中的头节点的数据处理方法，或实现上述的应用于转发路径中非头节点的节点的数据处理方法。
本领域技术人员可以理解，实现上述实施方式方法中的全部或部分步骤是可以通过程序来指令相关的硬件来完成，该程序存储在一个存储介质中，包括若干指令用以使得一个设备(可以是单片机，芯片等)或处理器(processor)执行本申请各个实施方式方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，简称“ROM”)、随机存取存储器(Random Access Memory，简称“RAM”)、磁碟或者光盘等各种可以存储程序代码的介质。
上述实施方式是提供给本领域普通技术人员来实现和使用本申请的，本领域普通技术人员可以在不脱离本申请的发明思想的情况下，对上述实施方式做出种种修改或变化，因而本申请的保护范围并不被上述实施方式所限，而应该符合权利要求书所提到的创新性特征的最大范围。

Claims (10)

  1. 一种数据处理方法，其中，应用于转发路径中的头节点，所述方法包括：
    获取数据流的转发路径的路径节点序列和路径标识；所述路径标识由网络控制器生成并下发给所述头节点或者由所述头节点生成，且所述路径标识供所述转发路径中非头节点的节点根据所述路径标识进行流量管理；以及
    将所述数据流、所述转发路径的路径节点序列和路径标识封装成数据流报文，并将所述数据流报文发送出去。
  2. 根据权利要求1所述的数据处理方法，其中，所述数据流报文包括IPv6头部和SRH头部，且所述路径节点序列封装在所述数据流报文的SRH头部中；
    所述路径标识封装在所述数据流报文的IPv6头部的预设空余字段中或SRH头部的预设空余字段中；或者，
    所述路径标识封装在所述数据流报文的SRH头部中，且所述路径标识的封装格式与所述路径节点序列的封装格式相同。
  3. 根据权利要求2所述的数据处理方法，其中，所述IPv6头部的预设空余字段包括：所述IPv6头部的Flow Label字段；所述SRH头部的预设空余字段包括：所述SRH头部的tag字段。
  4. 根据权利要求1至3中任一项所述的数据处理方法，其中，所述数据流报文的SRH头部的Flags字段作为标志位，用于指示所述数据流报文中是否封装有路径标识。
  5. 根据权利要求1所述的数据处理方法，其中，在所述路径标识由所述头节点生成的情况下，所述获取数据流的路径标识包括：
    根据所述数据流的转发路径，在所述头节点对应的路径标识列表中选取所述数据流的转发路径的路径标识；其中，所述头节点对应的路径标识列表不同于其他头节点对应的路径标识列表，所述转发路径的路径标识不同于其他转发路径的路径标识。
  6. 一种数据处理方法，其中，应用于转发路径中的中间节点，所述方法包括：
    接收上游节点发送的数据流报文；其中，所述数据流报文携带转发路径的路径节点序列和路径标识；
    根据所述数据流报文的所述路径标识进行流量管理；
    根据所述路径节点序列识别所述转发路径的下游节点，并更新所述数据流报文中的所述路径节点序列；以及
    将更新后的所述数据流报文发送至所述下游节点。
  7. 一种网络节点，其中，所述网络节点为转发路径中的头节点，包括：
    路径信息获取模块，用于获取数据流的转发路径的路径节点序列和路径标识；所述路径标识由网络控制器生成并下发给所述头节点或者由所述头节点生成，且所述路径标识供所述转发路径中非头节点的节点根据所述路径标识进行流量管理；以及
    报文封装模块，用于将所述数据流、所述转发路径的路径节点序列和路径标识封装成数据流报文，并将所述数据流报文发送出去。
  8. 一种网络节点，其中，所述网络节点为转发路径中的中间节点，包括：
    报文接收模块，用于接收上游节点发送的数据流报文；其中，所述数据流报文携带转发 路径的路径节点序列和路径标识；
    执行模块，用于根据所述数据流报文的所述路径标识进行流量管理；
    更新模块，用于根据所述路径节点序列识别所述转发路径的下游节点，并更新所述数据流报文中的所述路径节点序列；以及
    报文发送模块，用于将更新后的所述数据流报文发送至所述下游节点。
  9. 一种网络节点，其中，包括：
    至少一个处理器；以及，
    与所述至少一个处理器通信连接的存储器；其中，
    所述存储器存储有可被所述至少一个处理器执行的指令，所述指令被所述至少一个处理器执行，以使所述至少一个处理器能够执行如权利要求1至5中任一项所述的数据处理方法，或执行如权利要求6所述的数据处理方法。
  10. 一种计算机可读存储介质，存储有计算机程序，其中，所述计算机程序被处理器执行时实现权利要求1至5中任一项所述的数据处理方法，或实现如权利要求6所述的数据处理方法。
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