WO2024093064A1 - 一种大规模多模态网络中标识管理及优化转发方法和装置 - Google Patents

一种大规模多模态网络中标识管理及优化转发方法和装置 Download PDF

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Publication number
WO2024093064A1
WO2024093064A1 PCT/CN2023/078479 CN2023078479W WO2024093064A1 WO 2024093064 A1 WO2024093064 A1 WO 2024093064A1 CN 2023078479 W CN2023078479 W CN 2023078479W WO 2024093064 A1 WO2024093064 A1 WO 2024093064A1
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Prior art keywords
identification
identity
message
forwarding
mode
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PCT/CN2023/078479
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English (en)
French (fr)
Inventor
沈丛麒
张慧峰
邹涛
张汝云
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之江实验室
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Priority to US18/542,823 priority Critical patent/US20240171509A1/en
Publication of WO2024093064A1 publication Critical patent/WO2024093064A1/zh

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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
    • H04L45/38—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
    • H04L45/02—Topology update or discovery
    • 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
    • H04L49/00—Packet switching elements
    • H04L49/30—Peripheral units, e.g. input or output ports
    • H04L49/3009—Header conversion, routing tables or routing tags
    • 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

Definitions

  • the present invention relates to the technical field of multimodal network technology, and in particular to a method and device for identification management and optimized forwarding in a large-scale multimodal network.
  • a multimodal network multiple network technology systems are running at the same time, and each technology system is a network mode.
  • the switches in the network need to be configured with different flow tables to adapt to different modes.
  • the network scale is rapidly expanding, and the corresponding flow table scale is rapidly increasing, which will bring huge pressure to the operation of the backbone network.
  • the current mainstream technology is to divide the network into autonomous domains and set up a backbone network to reduce the flow table entries of each switch.
  • programmable switches are configured to dynamically configure and maintain the flow tables required for each mode in a programmatic way.
  • the purpose of the present invention is to provide a method and device for identification management and optimized forwarding in a large-scale multimodal network, which solves the problems of the prior art such as the rapid increase in flow table size, increased transmission delay, and difficulty in maintaining flow tables in large-scale multimodal networks.
  • a method for identification management and optimized forwarding in a large-scale multimodal network comprises the following steps:
  • Step S1 construct a multimodal backbone network
  • Step S2 modality identification management
  • Step S3 Matching switching resources for the switching node and determining the mode to be forwarded;
  • Step S4 configure a flow table for the switching node
  • Step S5 The balanced distributor receives the message and preliminarily analyzes the message type
  • Step S6 The balanced distributor parses the message type to obtain key field information in the message, determines the switch node to be allocated according to the key field information, and transmits the key field information to the corresponding switch node;
  • Step S7 The switching node matches the stored flow table according to the key field information to determine the correct forwarding action.
  • step S1 multiple switching clusters consisting of a balanced distributor and a preset number of switching nodes are deployed in the multimodal network, the number of the switching nodes is determined by the number of modes and the number of autonomous domains in the network, and the switching clusters replace the switches in the multimodal network to build a multimodal backbone network.
  • the multimodal backbone network in step S2 runs content identification modality, geographic identification modality and identity identification modality, defines a naming registration method for identification of the content identification modality, the geographic identification modality and the identity identification modality, determines the forwarding action executed by the message and matches the forwarding by the naming registration method.
  • the content identification modality is addressed by content identification
  • the content identification is a hierarchical naming, including multiple fields, and the first field is defined to be filled with the target autonomous domain name for subsequent forwarding;
  • the geographical identification modality is addressed by a geographical identification, and the geographical identification contains a target addressing area;
  • the identity identification mode is addressed by an identity identification, and the identity identification contains the identity ID of the destination.
  • step S4 specifically includes, for the same mode, horizontally splitting the flow table required for the same mode, and utilizing the mode identification management to disperse and store the flow table on different switching nodes.
  • step S4 is specifically as follows:
  • the target autonomous domain name set is divided into a plurality of mutually non-overlapping content identification subsets, the number of the content identification subsets is the number of switching nodes adapted to the content identification, each of the content identification subsets balances the load of each of the switching nodes, and at the same time, the target autonomous domain name contained in each of the content identification subsets is used by the balanced distributor to quickly determine the switching node to be allocated, each switching node adapted to the content identification mode is responsible for matching the target autonomous domain name in the content identification mode, and the switching node determines the correct forwarding port according to the target autonomous domain name in the message;
  • the target addressing area is divided into multiple non-overlapping sub-areas, the number of which is the number of switching nodes adapted to the geographic identification.
  • Each switching node adapted to the geographic identification mode is responsible for matching and storing all the target addressing areas in the geographic identification mode.
  • the switching node determines the target addressing area in the message. In one of all the target addressing areas, the correct forwarding port can be determined;
  • the identity ID registered in the multimodal network is divided into multiple non-overlapping identity ID subsets, the number of the identity ID subsets is the number of switching nodes adapted to the identity identification, each of the identity ID subsets balances the load of each of the switching nodes, and at the same time, the identity ID contained in each of the identity ID subsets is used by the balancing distributor to quickly determine the switching node to be allocated, and each switching node adapted to the identity identification modality is responsible for matching the identity ID of the destination end in the identity identification modality, and the switching node determines the correct forwarding port according to the identity ID of the destination end in the message.
  • step S5 is specifically that the balanced distributor determines the corresponding message type by parsing the type field of the message
  • the message type is content identification mode
  • the message type is geographic identification mode
  • the message type corresponds to the identity identification mode.
  • step S6 when the parsed message type is content identification mode, the content name in the message is nested and parsed in a "type-length-value" manner to obtain the target autonomous domain name;
  • offset 40 bytes from the type field of the message extract the content with a length of 12 bytes, and obtain the target addressing area;
  • the parsed message type is an identity identification mode
  • the identity identification information of the destination user of the message is obtained to determine the identity ID of the destination end.
  • step S7 when the message type is content identification mode, the switching node matches the target autonomous domain name and forwards it to the correct target autonomous domain;
  • the switching node determines whether the key field information belongs to the corresponding target addressing area in the flow table according to the priority, and executes the forwarding action in the first matching flow table;
  • the switching node When the message type is an identity identification mode, the switching node matches the identity ID of the destination end and determines the forwarding action to be performed.
  • the present invention also provides an apparatus for identifier management and optimized forwarding in a large-scale multimodal network, comprising a memory and one or more processors, wherein the memory stores executable code, and when the one or more processors execute the executable code, they are used to implement a method for identifier management and optimized forwarding in a large-scale multimodal network as described in any one of the above embodiments.
  • the present invention also provides a computer-readable storage medium having a program stored thereon, which, when executed by a processor, implements A method for identifier management and optimized forwarding in a large-scale multimodal network is now described in any of the above embodiments.
  • the present invention names and manages the modal identifiers used for routing in a multimodal network, controls the scale of the flow table, and adapts to large-scale multimodal networks.
  • the programmable switching node component switching cluster is used to pre-allocate the inlet traffic and speed up the forwarding speed.
  • splitting the flow table in the multimodal network can reduce the complexity of flow table maintenance in large-scale networks and have good scalability.
  • the hierarchical naming of content identifiers is defined so that it contains target autonomous domain information, avoiding the need for switching nodes to fully parse and calculate content identifiers, and avoiding the increase in flow table scale due to the diversification of request content; in terms of flow table settings, it is defined that the geographic mode only matches whether it belongs to the coverage of certain autonomous domains, effectively controlling the scale of the flow table; in terms of switching cluster configuration, a balanced distributor is set to pre-allocate the inlet traffic and speed up the forwarding speed.
  • splitting the flow table in the multimodal network can reduce the complexity of flow table maintenance in large-scale networks and have good scalability.
  • FIG1 is a flow chart of a method for managing and optimizing forwarding identification in a large-scale multimodal network according to the present invention
  • FIG2 is a diagram of a switching cluster framework of an embodiment
  • FIG3 is a schematic diagram of the structure of an apparatus for managing and optimizing forwarding identification in a large-scale multimodal network according to the present invention.
  • a method for identification management and optimized forwarding in a large-scale multimodal network includes the following steps:
  • Step S1 construct a multimodal backbone network
  • multiple switching clusters consisting of a balanced distributor and a preset number of switching nodes are deployed.
  • the number of the switching nodes is determined by the number of modes and autonomous domains in the network.
  • the switching clusters replace switches in the multimodal network to build a multimodal backbone network.
  • Step S2 modality identification management
  • the multimodal backbone network operates a content identification modality, a geographic identification modality, and an identity identification modality, defines a naming registration method for the content identification modality, the geographic identification modality, and the identity identification modality, determines a forwarding action executed by a message by using the naming registration method, and matches the forwarding;
  • the content identification modality is addressed by content identification, the content identification is a hierarchical name, including multiple fields, and the first field is defined to be filled with the target autonomous domain name for subsequent forwarding;
  • the geographical identification modality is addressed by a geographical identification, and the geographical identification contains a target addressing area;
  • the identity identification mode is addressed by an identity identification, and the identity identification contains the identity ID of the destination.
  • Step S3 Matching switching resources for the switching node and determining the mode to be forwarded;
  • Step S4 configure a flow table for the switching node
  • the flow table required for the same mode is split horizontally, and the flow table is dispersedly stored on different switching nodes by using the mode identification management;
  • the target autonomous domain name set is divided into a plurality of mutually non-overlapping content identification subsets, the number of the content identification subsets is the number of switching nodes adapted to the content identification, each of the content identification subsets balances the load of each of the switching nodes, and at the same time, the target autonomous domain name contained in each of the content identification subsets is used by the balanced distributor to quickly determine the switching node to be allocated, each switching node adapted to the content identification mode is responsible for matching the target autonomous domain name in the content identification mode, and the switching node determines the correct forwarding port according to the target autonomous domain name in the message;
  • the target addressing area is divided into a plurality of non-overlapping sub-areas, the number of which is the number of switching nodes adapted to the geographic identification, and each switching node adapted to the geographic identification mode is responsible for matching and storing all the target addressing areas in the geographic identification mode.
  • the switching node can determine the correct forwarding port by judging whether the target addressing area in the message belongs to one of all the target addressing areas;
  • the identity ID registered in the multimodal network is divided into multiple non-overlapping identity ID subsets, the number of the identity ID subsets is the number of switching nodes adapted to the identity identification, each of the identity ID subsets balances the load of each of the switching nodes, and at the same time, the identity ID contained in each of the identity ID subsets is used by the balancing distributor to quickly determine the switching node to be allocated, and each switching node adapted to the identity identification modality is responsible for matching the identity ID of the destination end in the identity identification modality, and the switching node determines the correct forwarding port according to the identity ID of the destination end in the message.
  • Step S5 The balanced distributor receives the message and preliminarily analyzes the message type
  • the balanced distributor determines the corresponding message type by parsing the message type field
  • the message type is content identification mode
  • the message type is geographic identification mode
  • the message type corresponds to the identity identification mode.
  • Step S6 The balanced distributor parses the message type to obtain key field information in the message, determines the switch node to be allocated according to the key field information, and transmits the key field information to the corresponding switch node;
  • the parsed message type is content identification mode
  • the content name in the message is nested and parsed in a "type-length-value" manner to obtain the target autonomous domain name
  • offset 40 bytes from the type field of the message extract the content with a length of 12 bytes, and obtain the target addressing area;
  • the parsed message type is an identity identification mode
  • the identity identification information of the destination user of the message is obtained to determine the identity ID of the destination end.
  • Step S7 the switching node matches the stored flow table according to the key field information to determine the correct forwarding action
  • the switching node matches the target autonomous domain name and forwards it to the correct target autonomous domain;
  • the switching node determines whether the key field information belongs to the corresponding target addressing area in the flow table according to the priority, and executes the forwarding action in the first matching flow table;
  • the switching node When the message type is an identity identification mode, the switching node matches the identity ID of the destination end and determines the forwarding action to be performed.
  • an embodiment of a method for managing identification and optimizing forwarding in a large-scale multimodal network includes the following steps:
  • Step S1 construct a multimodal backbone network
  • Deploy multiple switching clusters consisting of a balanced distributor and N switching nodes in a multimodal network, where the number of switching nodes is determined by the number of modes and autonomous domains in the network, and replace switches in the multimodal network with the switching clusters to build a multimodal backbone network;
  • the multimodal backbone network receives messages from autonomous domains and correctly forwards them to the corresponding target autonomous domains.
  • Step S2 modality identification management
  • the multimodal backbone network operates a content identification modality, a geographic identification modality, and an identity identification modality, defines a naming registration method for the content identification modality, the geographic identification modality, and the identity identification modality, determines a forwarding action executed by a message by using the naming registration method, and matches the forwarding;
  • the content identification modality is addressed by content identification, the content identification is a hierarchical name, including multiple fields, and the first field is defined to be filled with the target autonomous domain name for subsequent forwarding;
  • the geographical identification modality is addressed by a geographical identification, and the geographical identification contains a target addressing area;
  • the identity identification mode is addressed by an identity identification, and the identity identification contains the identity ID of the destination.
  • Step S3 Matching switching resources for N switching nodes and determining the mode to be forwarded;
  • k 1 represent the number of switching nodes carrying content identification modalities
  • k 2 represent the number of switching nodes carrying the geographic identification mode
  • k 3 represent the number of switching nodes carrying the identity identification mode
  • k 1 +k 2 +k 3 N is satisfied.
  • Step S4 configure a flow table for the switching node
  • the flow table required for the same mode is split horizontally, and the flow table is dispersedly stored on different switching nodes by using the mode identification management;
  • the target autonomous domain name set is divided into a plurality of mutually non-overlapping content identification subsets, the number of the content identification subsets is the number of switching nodes adapted to the content identification, each of the content identification subsets balances the load of each of the switching nodes, and at the same time, the target autonomous domain name contained in each of the content identification subsets is used by the balanced distributor to quickly determine the switching node to be allocated, each switching node adapted to the content identification mode is responsible for matching the target autonomous domain name in the content identification mode, and the switching node determines the correct forwarding port according to the target autonomous domain name in the message;
  • the set of all possible target autonomous domain names in the multimodal backbone network is ⁇ , and divide the target autonomous domain name set ⁇ into k 1 mutually disjoint content identifier subsets, which are denoted as Satisfy the collection Switching Node A subset of stored content identifiers All the target autonomous domain names and corresponding forwarding ports in the message only need to determine the correct forwarding port based on the target autonomous domain name in the message.
  • the target addressing area is divided into a plurality of non-overlapping sub-areas, the number of which is the number of switching nodes adapted to the geographic identification, and each switching node adapted to the geographic identification mode is responsible for matching and storing all the target addressing areas in the geographic identification mode.
  • the switching node can determine the correct forwarding port by judging whether the target addressing area in the message belongs to one of all the target addressing areas;
  • the entire target addressing area set covered by the multimodal backbone network is ⁇
  • divide the actual information set ⁇ of the target addressing area into k 2 mutually non-overlapping sub-areas denoted as The set that satisfies each sub-region is Switching Node storage All possible target addressing areas in the sub-area, i.e. The autonomous domain coverage involved in the packet and all possible combinations of adjacent autonomous domains. If the target addressing area is smaller, the corresponding flow table entry has a higher priority and will be matched first.
  • the correct forwarding port can be determined by looking at one of all possible destination addressing ranges in the subset.
  • the identity ID registered in the multimodal network is divided into a plurality of mutually disjoint identity ID subsets, the number of the identity ID subsets being the number of switching nodes adapted to the identity, and each of the identity ID subsets
  • the load of each switching node is balanced.
  • the identity ID contained in each identity ID subset is used by the balancing distributor to quickly determine the switching node to be allocated.
  • Each switching node adapted to the identity identification mode is responsible for matching the identity ID of the destination end in the identity identification mode. The switching node determines the correct forwarding port according to the identity ID of the destination end in the message.
  • the entire user ID set covered by the multimodal network is ⁇
  • divide the entire user ID set ⁇ into k 3 mutually disjoint ID subsets, denoted as The set of ID subsets that satisfy each identity is Switching Node storage All possible destination IDs and corresponding forwarding ports in the ID subset. Determine the correct forwarding port based on the destination ID in the message.
  • This design splits the flow table horizontally, which can reduce the flow table entries on each switching node and shorten the matching query time.
  • Step S5 The balanced distributor receives the message and preliminarily analyzes the message type
  • the balanced distributor determines the corresponding message type by parsing the message type field
  • the message type is content identification mode
  • the message type is geographic identification mode
  • the message type corresponds to the identity identification mode.
  • Step S6 The balanced distributor parses the message type to obtain key field information in the message, determines the switch node to be allocated according to the key field information, and transmits the key field information to the corresponding switch node;
  • the parsed message type is content identification mode
  • the content name in the message is parsed in a nested manner of "type-length-value" to obtain the target autonomous domain name; if the parsed name belongs to a subset It is forwarded to the switching node
  • offset 40 bytes from the type field of the message extract the content of 12 bytes in length, and obtain the target addressing area; if the parsed target addressing area is part of the
  • the identity identification information of the message destination user is obtained to determine the identity ID of the destination end; if the identity ID of the destination end obtained by parsing belongs to the subset Forward to
  • Step S7 The switching node matches the stored flow table according to the key field information to determine the correct forwarding action.
  • the switching node matches the target autonomous domain name and forwards it to the correct target autonomous domain;
  • the switching node determines whether the key field information belongs to the corresponding target addressing area in the flow table according to the priority, and executes the forwarding in the first matching flow table. action;
  • the switching node When the message type is an identity identification mode, the switching node matches the identity ID of the destination end and determines the forwarding action to be performed.
  • the present invention also provides an embodiment of a device for managing identifiers and optimizing forwarding in a large-scale multimodal network.
  • an apparatus for managing and optimizing forwarding identifiers in a large-scale multimodal network includes a memory and one or more processors, wherein the memory stores executable code, and when the one or more processors execute the executable code, they are used to implement a method for managing and optimizing forwarding identifiers in a large-scale multimodal network in the above-mentioned embodiment.
  • An embodiment of an identification management and optimized forwarding device in a large-scale multimodal network of the present invention can be applied to any device with data processing capabilities, and the arbitrary device with data processing capabilities can be a device or apparatus such as a computer.
  • the device embodiment can be implemented by software, or by hardware or a combination of software and hardware. Taking software implementation as an example, as a device in a logical sense, it is formed by the processor of any device with data processing capabilities in which it is located to read the corresponding computer program instructions in the non-volatile memory into the memory for execution. From the hardware level, as shown in Figure 3, it is a hardware structure diagram of any device with data processing capabilities in which an Internet of Things device collaborative linkage device of the present invention is located.
  • any device with data processing capabilities in which the device in the embodiment is located can also include other hardware according to the actual function of the arbitrary device with data processing capabilities, which will not be described in detail.
  • the relevant parts can refer to the partial description of the method embodiment.
  • the device embodiment described above is only schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of the present invention. Ordinary technicians in this field can understand and implement it without paying creative work.
  • An embodiment of the present invention further provides a computer-readable storage medium having a program stored thereon.
  • the program is executed by a processor, a method for identifier management and optimized forwarding in a large-scale multimodal network in the above embodiment is implemented.
  • the computer-readable storage medium may be an internal storage unit of any device with data processing capability described in any of the above embodiments, such as a hard disk or memory.
  • the computer-readable storage medium may also be an external storage device of any device with data processing capability, such as a plug-in hard disk, a smart memory card (Smart Media Card, SMC), SD card, flash card, etc.
  • the computer-readable storage medium may also include both an internal storage unit of any device with data processing capability and an external storage device.
  • the computer-readable storage medium is used to store the computer program and other programs and data required by any device with data processing capability, and may also be used to temporarily store data that has been output or is to be output.

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Abstract

本发明公开了一种大规模多模态网络中标识管理及优化转发方法和装置，包括以下步骤：步骤S1：构建多模态骨干网；步骤S2：模态标识管理；步骤S3：确定应转发的模态；步骤S4：为交换节点配置流表；步骤S5：均衡分发器收到报文，初步解析报文类型；步骤S6：解析得到报文中的关键字段信息，根据所述关键字段信息确定应分配的交换节点，并将所述关键字段信息传递给对应的交换节点；步骤S7：所述交换节点根据所述关键字段信息，匹配存储的所述流表确定正确的转发动作。本发明对多模态网络中用于路由的模态标识进行命名管理，控制流表规模，以适应大规模多模态网络。利用可编程交换节点组件交换集群，对入口流量进行预分配，加快转发速度。

Description

一种大规模多模态网络中标识管理及优化转发方法和装置 技术领域
本发明涉及一种多模态网络技术技术领域，尤其涉及一种大规模多模态网络中标识管理及优化转发方法和装置。
背景技术
在多模态网络中，同时运行着多种网络技术体制，每一种技术体制即为一种网络模态。为能够同时转发不同网络模态的报文，网络中的交换机需要配置不同的流表以适配不同的模态。随着接入终端不断增加，网络规模迅速扩大，相应的流表规模迅速增加，这会给骨干网的运行带来巨大的压力。
对于上述需要，目前主流技术是对网络划分自治域，设置骨干网，从而减少每个交换机的流表条目。同时，配置可编程交换机，以编程化的方式动态配置、维护各模态所需的流表。
在实现本发明过程中，本发明人发现现有技术至少存在如下问题：
首先，骨干网仍然沿用目前的网络转发规则匹配技术，则每一个交换机上的流表条目数量仍然会因为终端增加而急剧增大，最终影响网络传输时延。另外，将多个网关节点划分为不同的自治域，但是由于目前商业化转发设备对于下一跳的最大可能数有限(例如，在Juniper Networks安全设备上，下一跳地址的最大数量为16)，这严重限制了自治域大小，进一步增加了维护的复杂性。最后，尽管可编程交换机能动态部署维护各模态所需流表，但是容易发生故障难以快速维护。
为此，我们提出一种大规模多模态网络中标识管理及优化转发方法和装置以解决上述技术问题。
发明内容
本发明的目的在于提供一种大规模多模态网络中标识管理及优化转发方法和装置，解决了现有技术中大规模多模态网络中流表规模急剧增加、传输时延增加、流表难以维护等缺陷的问题。
本发明采用的技术方案如下：
一种大规模多模态网络中标识管理及优化转发方法，包括以下步骤：
步骤S1：构建多模态骨干网；
步骤S2：模态标识管理；
步骤S3：为交换节点匹配交换资源，确定应转发的模态；
步骤S4：为交换节点配置流表；
步骤S5：均衡分发器收到报文，初步解析报文类型；
步骤S6：均衡分发器根据所述报文类型，解析得到报文中的关键字段信息，根据所述关键字段信息确定应分配的交换节点，并将所述关键字段信息传递给对应的交换节点；
步骤S7：所述交换节点根据所述关键字段信息，匹配存储的所述流表确定正确的转发动作。
进一步地，所述步骤S1中在多模态网络中部署多个由一个均衡分发器和预设个数的多个交换节点构成的交换集群，所述交换节点的数量由网络中模态的数量和自治域数量决定，并将所述交换集群替换所述多模态网络中的交换机，构建多模态骨干网。
进一步地，所述步骤S2中所述多模态骨干网运行内容标识模态、地理标识模态和身份标识模态，对所述内容标识模态、所述地理标识模态和所述身份标识模态定义标识的命名注册方式，以所述命名注册方式确定报文执行的转发动作并匹配转发。
进一步地，所述内容标识模态以内容标识进行寻址，所述内容标识为层次化命名，包括多个字段，定义第一字段填充目标自治域名字用于后续转发；
所述地理标识模态以地理标识进行寻址，所述地理标识中含有目标寻址区域；
所述身份标识模态以身份标识寻址，所述身份标识中含有目的端的身份ID。
进一步地，所述步骤S4具体为对于同一模态，将同一模态所需要使用的流表进行横向拆分，同时利用所述模态标识管理，将流表分散存储于不同的所述交换节点上。
进一步地，所述步骤S4具体为：
对于内容标识模态，将所述目标自治域名字集合划分为多个互不相交的内容标识子集，所述内容标识子集的个数为适配内容标识的交换节点数量，每个所述内容标识子集均衡各个所述交换节点的负载，同时，每个所述内容标识子集内部包含的目标自治域名字用于所述均衡分发器快速确定应分配的所述交换节点，适配内容标识模态的每个交换节点分别负责匹配内容标识模态中的所述目标自治域名字，所述交换节点根据报文中的所述目标自治域名字确定正确的转发端口；
对于地理标识模态，将所述目标寻址区域划分为多个互不重叠的子区域，所述子区域的个数为适配地理标识的交换节点数量，适配地理标识模态的每个交换节点分别负责匹配并存储地理标识模态中的所有所述目标寻址区域，当所述目标寻址区域越小，则对应的流表条目优先级越高，会优先匹配；所述交换节点在转发报文时，通过判断报文中的目标寻址区域属 于所有所述目标寻址区域中的一种，即可确定正确的转发端口；
对于身份标识模态，将所述多模态网络中注册过的所述身份ID划分为多个互不相交的身份ID子集，所述身份ID子集个数为适配身份标识的交换节点数量，每个所述身份ID子集均衡各个所述交换节点的负载，同时，每个所述身份ID子集内部包含的身份ID用于均衡分发器快速确定应分配的所述交换节点，适配身份标识模态的每个交换节点分别负责匹配身份标识模态中的目的端的所述身份ID，所述交换节点根据报文中的目的端的所述身份ID确定正确的转发端口。
进一步地，所述步骤S5具体为均衡分发器通过解析报文的类型字段，判断对应的报文类型；
当报文的类型字段为0x8624，则报文类型为内容标识模态；
当报文的类型字段为0x8947，则报文类型为地理标识模态；
当报文的类型字段为0x27C0，则报文类型对应身份标识模态。
进一步地，所述步骤S6中当解析到的所述报文类型为内容标识模态，则以“类型-长度-值”的方式嵌套解析报文中的内容名字，得到目标自治域名字；
当解析到的所述报文类型为地理标识模态，则自报文的类型字段之后偏移40字节，提取长度为12字节的内容，得到目标寻址区域；
当解析到的所述报文类型为身份标识模态，则获取报文目的用户的身份标识信息，确定目的端的身份ID。
进一步地，所述步骤S7中具体为当所述报文类型为内容标识模态，则所述交换节点匹配所述目标自治域名字，转发至正确的目标自治域；
当所述报文类型为地理标识模态，则所述交换节点按照优先级，依次判断所述关键字段信息是否属于所述流表中对应的所述目标寻址区域，执行第一条匹配上的所述流表中的转发动作；
当所述报文类型为身份标识模态，则所述交换节点匹配所述目的端的身份ID，确定应执行的转发动作。
本发明还提供一种大规模多模态网络中标识管理及优化转发装置，包括存储器和一个或多个处理器，所述存储器中存储有可执行代码，所述一个或多个处理器执行所述可执行代码时，用于实现上述实施例任一项所述的一种大规模多模态网络中标识管理及优化转发方法。
本发明还提供一种计算机可读存储介质，其上存储有程序，该程序被处理器执行时，实 现上述实施例任一项所述的一种大规模多模态网络中标识管理及优化转发方法。
本发明的有益效果是：本发明对多模态网络中用于路由的模态标识进行命名管理，控制流表规模，以适应大规模多模态网络。同时，利用可编程交换节点组件交换集群，对入口流量进行预分配，加快转发速度。此外，对多模态网络中的流表进行拆分，能够降低大规模网络中的流表维护复杂程度，具备良好的可扩展性。在模态标识管理方面，定义了内容标识的层次化命名，使其含有目标自治域信息，避免交换节点需要完全解析、计算内容标识，避免了因请求内容多样化而增加流表规模；在流表设置方面，定义了地理模态仅匹配是否属于某些自治域覆盖范围，有效控制了流表规模；在交换集群配置方面，设置了均衡分发器，对入口流量进行预分配，加快转发速度。此外，对多模态网络中的流表进行拆分，能够降低大规模网络中的流表维护复杂程度，具备良好的可扩展性。
附图说明
图1为本发明一种大规模多模态网络中标识管理及优化转发方法的流程示意图；
图2为实施例的一个交换集群框架图；
图3为本发明一种大规模多模态网络中标识管理及优化转发装置的结构示意图。
具体实施方式
以下对至少一个示例性实施例的描述实际上仅仅是说明性的，决不作为对本发明及其应用或使用的任何限制。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
参见图1，一种大规模多模态网络中标识管理及优化转发方法，包括以下步骤：
步骤S1：构建多模态骨干网；
在多模态网络中部署多个由一个均衡分发器和预设个数的多个交换节点构成的交换集群，所述交换节点的数量由网络中模态的数量和自治域数量决定，并将所述交换集群替换所述多模态网络中的交换机，构建多模态骨干网。
步骤S2：模态标识管理；
所述多模态骨干网运行内容标识模态、地理标识模态和身份标识模态，对所述内容标识模态、所述地理标识模态和所述身份标识模态定义标识的命名注册方式，以所述命名注册方式确定报文执行的转发动作并匹配转发；
所述内容标识模态以内容标识进行寻址，所述内容标识为层次化命名，包括多个字段，定义第一字段填充目标自治域名字用于后续转发；
所述地理标识模态以地理标识进行寻址，所述地理标识中含有目标寻址区域；
所述身份标识模态以身份标识寻址，所述身份标识中含有目的端的身份ID。
步骤S3：为交换节点匹配交换资源，确定应转发的模态；
步骤S4：为交换节点配置流表；
对于同一模态，将同一模态所需要使用的流表进行横向拆分，同时利用所述模态标识管理，将流表分散存储于不同的所述交换节点上；
对于内容标识模态，将所述目标自治域名字集合划分为多个互不相交的内容标识子集，所述内容标识子集的个数为适配内容标识的交换节点数量，每个所述内容标识子集均衡各个所述交换节点的负载，同时，每个所述内容标识子集内部包含的目标自治域名字用于所述均衡分发器快速确定应分配的所述交换节点，适配内容标识模态的每个交换节点分别负责匹配内容标识模态中的所述目标自治域名字，所述交换节点根据报文中的所述目标自治域名字确定正确的转发端口；
对于地理标识模态，将所述目标寻址区域划分为多个互不重叠的子区域，所述子区域的个数为适配地理标识的交换节点数量，适配地理标识模态的每个交换节点分别负责匹配并存储地理标识模态中的所有所述目标寻址区域，当所述目标寻址区域越小，则对应的流表条目优先级越高，会优先匹配；所述交换节点在转发报文时，通过判断报文中的目标寻址区域属于所有所述目标寻址区域中的一种，即可确定正确的转发端口；
对于身份标识模态，将所述多模态网络中注册过的所述身份ID划分为多个互不相交的身份ID子集，所述身份ID子集个数为适配身份标识的交换节点数量，每个所述身份ID子集均衡各个所述交换节点的负载，同时，每个所述身份ID子集内部包含的身份ID用于均衡分发器快速确定应分配的所述交换节点，适配身份标识模态的每个交换节点分别负责匹配身份标识模态中的目的端的所述身份ID，所述交换节点根据报文中的目的端的所述身份ID确定正确的转发端口。
步骤S5：均衡分发器收到报文，初步解析报文类型；
均衡分发器通过解析报文的类型字段，判断对应的报文类型；
当报文的类型字段为0x8624，则报文类型为内容标识模态；
当报文的类型字段为0x8947，则报文类型为地理标识模态；
当报文的类型字段为0x27C0，则报文类型对应身份标识模态。
步骤S6：均衡分发器根据所述报文类型，解析得到报文中的关键字段信息，根据所述关键字段信息确定应分配的交换节点，并将所述关键字段信息传递给对应的交换节点；
当解析到的所述报文类型为内容标识模态，则以“类型-长度-值”的方式嵌套解析报文中的内容名字，得到目标自治域名字；
当解析到的所述报文类型为地理标识模态，则自报文的类型字段之后偏移40字节，提取长度为12字节的内容，得到目标寻址区域；
当解析到的所述报文类型为身份标识模态，则获取报文目的用户的身份标识信息，确定目的端的身份ID。
步骤S7：所述交换节点根据所述关键字段信息，匹配存储的所述流表确定正确的转发动作；
当所述报文类型为内容标识模态，则所述交换节点匹配所述目标自治域名字，转发至正确的目标自治域；
当所述报文类型为地理标识模态，则所述交换节点按照优先级，依次判断所述关键字段信息是否属于所述流表中对应的所述目标寻址区域，执行第一条匹配上的所述流表中的转发动作；
当所述报文类型为身份标识模态，则所述交换节点匹配所述目的端的身份ID，确定应执行的转发动作。
参见图2，实施例：一种大规模多模态网络中标识管理及优化转发方法，包括以下步骤：
步骤S1：构建多模态骨干网；
在多模态网络中部署多个由一个均衡分发器和N个交换节点构成的交换集群，所述交换节点的数量由网络中模态的数量和自治域数量决定，并将所述交换集群替换所述多模态网络中的交换机，构建多模态骨干网；
多模态骨干网接收来自自治域的报文并正确转发至相应的目标自治域。
步骤S2：模态标识管理；
所述多模态骨干网运行内容标识模态、地理标识模态和身份标识模态，对所述内容标识模态、所述地理标识模态和所述身份标识模态定义标识的命名注册方式，以所述命名注册方式确定报文执行的转发动作并匹配转发；
所述内容标识模态以内容标识进行寻址，所述内容标识为层次化命名，包括多个字段，定义第一字段填充目标自治域名字用于后续转发；
所述地理标识模态以地理标识进行寻址，所述地理标识中含有目标寻址区域；
所述身份标识模态以身份标识寻址，所述身份标识中含有目的端的身份ID。
步骤S3：为N个交换节点匹配交换资源，确定应转发的模态；
由于不同的模态类型匹配方式不同、具体匹配字段也不同，因此对于交换节点上的资源特征要求也不同，因此，为不同的交换节点配置不同的资源，包括ASIC、CPU、FPGA等，以适配不同的模态。用k1表示承载内容标识模态的交换节点个数，节点序号分别表示为 用k2表示承载地理标识模态的交换节点个数，其交换节点序号表示为用k3表示承载身份标识模态的交换节点个数，其交换节点序号分别表示为其中，满足k1+k2+k3＝N。
步骤S4：为交换节点配置流表；
对于同一模态，将同一模态所需要使用的流表进行横向拆分，同时利用所述模态标识管理，将流表分散存储于不同的所述交换节点上；
对于内容标识模态，将所述目标自治域名字集合划分为多个互不相交的内容标识子集，所述内容标识子集的个数为适配内容标识的交换节点数量，每个所述内容标识子集均衡各个所述交换节点的负载，同时，每个所述内容标识子集内部包含的目标自治域名字用于所述均衡分发器快速确定应分配的所述交换节点，适配内容标识模态的每个交换节点分别负责匹配内容标识模态中的所述目标自治域名字，所述交换节点根据报文中的所述目标自治域名字确定正确的转发端口；
假设多模态骨干网中所有可能的目标自治域名字集合为ζ，将目标自治域名字集合ζ划分为k1个互不相交的内容标识子集，分别记为满足合集为交换节点存储的内容标识子集中所有的目标自治域名字及对应的转发端口，只需要根据报文中的目标自治域名字确定正确的转发端口。
对于地理标识模态，将所述目标寻址区域划分为多个互不重叠的子区域，所述子区域的个数为适配地理标识的交换节点数量，适配地理标识模态的每个交换节点分别负责匹配并存储地理标识模态中的所有所述目标寻址区域，当所述目标寻址区域越小，则对应的流表条目优先级越高，会优先匹配；所述交换节点在转发报文时，通过判断报文中的目标寻址区域属于所有所述目标寻址区域中的一种，即可确定正确的转发端口；
假设多模态骨干网所覆盖的整个目标寻址区域集合为γ，将目标寻址区域的实际信息集合γ划分为k2个互不相交的子区域，记为满足各子区域的合集为 交换节点存储子区域中所有可能目标寻址区域，即中涉及的自治域覆盖范围及相邻自治域所有可能组合区域，其中，如果目标寻址区域面积越小，则对应的流表条目优先级越高，会优先匹配。在转发报文时，只需要判断报文中的目标寻址区域是否属于子集中所有可能目标寻址区域中的一种，就可以确定正确的转发端口。
对于身份标识模态，将所述多模态网络中注册过的所述身份ID划分为多个互不相交的身份ID子集，所述身份ID子集个数为适配身份标识的交换节点数量，每个所述身份ID子集 均衡各个所述交换节点的负载，同时，每个所述身份ID子集内部包含的身份ID用于均衡分发器快速确定应分配的所述交换节点，适配身份标识模态的每个交换节点分别负责匹配身份标识模态中的目的端的所述身份ID，所述交换节点根据报文中的目的端的所述身份ID确定正确的转发端口。
假设多模态网络所覆盖的整个用户的身份ID集合为ψ，将整个用户身份ID集合ψ划分为k3个互不相交的身份ID子集，记为满足各身份ID子集的合集为 交换节点存储身份ID子集中所有可能的目的端身份ID及对应的转发端口。根据报文中的目的端身份ID确定正确的转发端口。
这样的设计对流表进行横向拆分，可以减少每一个交换节点上的流表条目，缩短匹配查询时间。
步骤S5：均衡分发器收到报文，初步解析报文类型；
均衡分发器通过解析报文的类型字段，判断对应的报文类型；
当报文的类型字段为0x8624，则报文类型为内容标识模态；
当报文的类型字段为0x8947，则报文类型为地理标识模态；
当报文的类型字段为0x27C0，则报文类型对应身份标识模态。
步骤S6：均衡分发器根据所述报文类型，解析得到报文中的关键字段信息，根据所述关键字段信息确定应分配的交换节点，并将所述关键字段信息传递给对应的交换节点；
当解析到的所述报文类型为内容标识模态，则以“类型-长度-值”的方式嵌套解析报文中的内容名字，得到目标自治域名字；如果所解析的名字属于子集则转发给交换节点
当解析到的所述报文类型为地理标识模态，则自报文的类型字段之后偏移40字节，提取长度为12字节的内容，得到目标寻址区域；如果所解析的目标寻址区域为的一部分，则转发给
当解析到的所述报文类型为身份标识模态，则获取报文目的用户的身份标识信息，确定目的端的身份ID；如果解析得到的目的端的身份ID属于子集则转发给
步骤S7：所述交换节点根据所述关键字段信息，匹配存储的所述流表确定正确的转发动作。
当所述报文类型为内容标识模态，则所述交换节点匹配所述目标自治域名字，转发至正确的目标自治域；
当所述报文类型为地理标识模态，则所述交换节点按照优先级，依次判断所述关键字段信息是否属于所述流表中对应的所述目标寻址区域，执行第一条匹配上的所述流表中的转发 动作；
当所述报文类型为身份标识模态，则所述交换节点匹配所述目的端的身份ID，确定应执行的转发动作。
与前述一种大规模多模态网络中标识管理及优化转发方法的实施例相对应，本发明还提供了一种大规模多模态网络中标识管理及优化转发装置的实施例。
参见图3，本发明实施例提供的一种大规模多模态网络中标识管理及优化转发装置，包括存储器和一个或多个处理器，所述存储器中存储有可执行代码，所述一个或多个处理器执行所述可执行代码时，用于实现上述实施例中的一种大规模多模态网络中标识管理及优化转发方法。
本发明一种大规模多模态网络中标识管理及优化转发装置的实施例可以应用在任意具备数据处理能力的设备上，该任意具备数据处理能力的设备可以为诸如计算机等设备或装置。装置实施例可以通过软件实现，也可以通过硬件或者软硬件结合的方式实现。以软件实现为例，作为一个逻辑意义上的装置，是通过其所在任意具备数据处理能力的设备的处理器将非易失性存储器中对应的计算机程序指令读取到内存中运行形成的。从硬件层面而言，如图3所示，为本发明一种物联网设备协同联动装置所在任意具备数据处理能力的设备的一种硬件结构图，除了图3所示的处理器、内存、网络接口、以及非易失性存储器之外，实施例中装置所在的任意具备数据处理能力的设备通常根据该任意具备数据处理能力的设备的实际功能，还可以包括其他硬件，对此不再赘述。
上述装置中各个单元的功能和作用的实现过程具体详见上述方法中对应步骤的实现过程，在此不再赘述。
对于装置实施例而言，由于其基本对应于方法实施例，所以相关之处参见方法实施例的部分说明即可。以上所描述的装置实施例仅仅是示意性的，其中所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部模块来实现本发明方案的目的。本领域普通技术人员在不付出创造性劳动的情况下，即可以理解并实施。
本发明实施例还提供一种计算机可读存储介质，其上存储有程序，该程序被处理器执行时，实现上述实施例中的一种大规模多模态网络中标识管理及优化转发方法。
所述计算机可读存储介质可以是前述任一实施例所述的任意具备数据处理能力的设备的内部存储单元，例如硬盘或内存。所述计算机可读存储介质也可以是任意具备数据处理能力的设备的外部存储设备，例如所述设备上配备的插接式硬盘、智能存储卡(Smart Media Card， SMC)、SD卡、闪存卡(Flash Card)等。进一步的，所述计算机可读存储介质还可以既包括任意具备数据处理能力的设备的内部存储单元也包括外部存储设备。所述计算机可读存储介质用于存储所述计算机程序以及所述任意具备数据处理能力的设备所需的其他程序和数据，还可以用于暂时地存储已经输出或者将要输出的数据。
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换或改进等，均应包含在本发明的保护范围之内。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (6)

  1. 一种大规模多模态网络中标识管理及优化转发方法，其特征在于，包括以下步骤：
    步骤S1：构建多模态骨干网；
    在多模态网络中部署多个由一个均衡分发器和预设个数的多个交换节点构成的交换集群，所述交换节点的数量由网络中模态的数量和自治域数量决定，并将所述交换集群替换所述多模态网络中的交换机，构建多模态骨干网；
    步骤S2：模态标识管理；
    所述多模态骨干网运行内容标识模态、地理标识模态和身份标识模态，对所述内容标识模态、所述地理标识模态和所述身份标识模态定义标识的命名注册方式，以所述命名注册方式确定报文执行的转发动作并匹配转发；
    所述内容标识模态以内容标识进行寻址，所述内容标识为层次化命名，包括多个字段，定义第一字段填充目标自治域名字用于后续转发；
    所述地理标识模态以地理标识进行寻址，所述地理标识中含有目标寻址区域；
    所述身份标识模态以身份标识寻址，所述身份标识中含有目的端的身份ID；
    步骤S3：为交换节点匹配交换资源，确定应转发的模态；
    步骤S4：为交换节点配置流表；
    对于同一模态，将同一模态所需要使用的流表进行横向拆分，同时利用所述模态标识管理，将流表分散存储于不同的所述交换节点上；
    对于内容标识模态，将所述目标自治域名字集合划分为多个互不相交的内容标识子集，所述内容标识子集的个数为适配内容标识的交换节点数量，每个所述内容标识子集均衡各个所述交换节点的负载，同时，每个所述内容标识子集内部包含的目标自治域名字用于所述均衡分发器快速确定应分配的所述交换节点，适配内容标识模态的每个交换节点分别负责匹配内容标识模态中的所述目标自治域名字，所述交换节点根据报文中的所述目标自治域名字确定正确的转发端口；
    对于地理标识模态，将所述目标寻址区域划分为多个互不重叠的子区域，所述子区域的个数为适配地理标识的交换节点数量，适配地理标识模态的每个交换节点分别负责匹配并存储地理标识模态中的所有所述目标寻址区域，当所述目标寻址区域越小，则对应的流表条目优先级越高，会优先匹配；所述交换节点在转发报文时，通过判断报文中的目标寻址区域属于所有所述目标寻址区域中的一种，即可确定正确的转发端口；
    对于身份标识模态，将所述多模态网络中注册过的所述身份ID划分为多个互不相交的身份ID子集，所述身份ID子集个数为适配身份标识的交换节点数量，每个所述身份ID子集均 衡各个所述交换节点的负载，同时，每个所述身份ID子集内部包含的身份ID用于均衡分发器快速确定应分配的所述交换节点，适配身份标识模态的每个交换节点分别负责匹配身份标识模态中的目的端的所述身份ID，所述交换节点根据报文中的目的端的所述身份ID确定正确的转发端口；
    步骤S5：均衡分发器收到报文，初步解析报文类型；
    步骤S6：均衡分发器根据所述报文类型，解析得到报文中的关键字段信息，根据所述关键字段信息确定应分配的交换节点，并将所述关键字段信息传递给对应的交换节点；
    步骤S7：所述交换节点根据所述关键字段信息，匹配存储的所述流表确定正确的转发动作。
  2. 如权利要求1所述的一种大规模多模态网络中标识管理及优化转发方法，其特征在于，所述步骤S5具体为均衡分发器通过解析报文的类型字段，判断对应的报文类型；
    当报文的类型字段为0x8624，则报文类型为内容标识模态；
    当报文的类型字段为0x8947，则报文类型为地理标识模态；
    当报文的类型字段为0x27C0，则报文类型为身份标识模态。
  3. 如权利要求1所述的一种大规模多模态网络中标识管理及优化转发方法，其特征在于，所述步骤S6中当解析到的所述报文类型为内容标识模态，则以“类型-长度-值”的方式嵌套解析报文中的内容名字，得到目标自治域名字；
    当解析到的所述报文类型为地理标识模态，则自报文的类型字段之后偏移40字节，提取长度为12字节的内容，得到目标寻址区域；
    当解析到的所述报文类型为身份标识模态，则获取报文目的用户的身份标识信息，确定目的端的身份ID。
  4. 如权利要求3所述的一种大规模多模态网络中标识管理及优化转发方法，其特征在于，所述步骤S7中具体为当所述报文类型为内容标识模态，则所述交换节点匹配所述目标自治域名字，转发至正确的目标自治域；
    当所述报文类型为地理标识模态，则所述交换节点按照优先级，依次判断所述关键字段信息是否属于所述流表中对应的所述目标寻址区域，执行第一条匹配上的所述流表中的转发动作；
    当所述报文类型为身份标识模态，则所述交换节点匹配所述目的端的身份ID，确定应执行的转发动作。
  5. 一种大规模多模态网络中标识管理及优化转发装置，其特征在于，包括存储器和一个或 多个处理器，所述存储器中存储有可执行代码，所述一个或多个处理器执行所述可执行代码时，用于实现权利要求1-4中任一项所述的一种大规模多模态网络中标识管理及优化转发方法。
  6. 一种计算机可读存储介质，其特征在于，其上存储有程序，该程序被处理器执行时，实现权利要求1-4中任一项所述的一种大规模多模态网络中标识管理及优化转发方法。
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