CN111611613A - ICN-based Industrial Internet Identification Analysis System and Data Access Method - Google Patents

Abstract

The invention discloses an industrial internet identification analysis system and a data access method based on ICN, which realize the fusion of industrial internet identification analysis and routing based on NDN, and can simultaneously realize the network connection and identification analysis capability of the industrial internet by introducing the ICN technology into the industrial internet, thereby flattening the overall architecture of the industrial internet, improving the information acquisition efficiency, improving the network expandability and improving the data security of the industrial internet. Meanwhile, due to the fact that the deployment of an analysis server is omitted, the scheme can effectively solve the problem of heterogeneous incompatibility of industrial internet identification analysis.

Description

ICN-based Industrial Internet Identification Analysis System and Data Access Method

technical field

The invention relates to the technical field of the industrial Internet, in particular to an ICN-based industrial Internet identification resolution system and a data access method.

Background technique

The Industrial Internet is an industrial cloud network that supports the ubiquitous connection, flexible supply, and efficient configuration of manufacturing resources to meet the digital, networked, and intelligent needs of the manufacturing industry. It builds a service system based on massive data collection, aggregation, and analysis. An important foundation for the construction of a strong network country. Its ultimate goal is to realize intelligentization of enterprises and help my country transform from a manufacturing power to a manufacturing power.

The industrial Internet architecture includes four main aspects: network connection architecture, platform framework, security architecture, and identity resolution framework. Among them, network connection is an important basis for realizing the layout of the Industrial Internet. The core of the Industrial Internet is to connect the entire industrial system, break the information island, and ensure that data can be transmitted between different devices and systems without obstacles, thereby forming a systematic intelligent system. The identification resolution system is a key hub connecting industrial elements, responsible for providing services such as identification registration, management, and analysis, and is the key to realizing industrial data interoperability. The identification parsing system consists of two parts: identification coding and parsing system. Among them, the identification code is used as an "identity card" to uniquely identify the equipment; the parsing system uses the identification to uniquely locate, address and query the equipment. At present, there are various identification analysis systems in the world, such as EPCglobal system, OID system, Handle system, Ecode system, UID system, etc. The development of the industrial Internet identification resolution system will provide support for public services and information sharing.

At present, the industrial Internet needs to achieve high efficiency, heterogeneous compatibility, and security. In order to support the differentiated requirements of industrial Internet applications such as low latency and real-time feedback, efficient identification resolution and routing are required. Since the current identification analysis system has not been unified, there are various identification analysis systems at home and abroad. With the development of the Industrial Internet, the future Industrial Internet system must be heterogeneous, multi-layered and distributed. The security of industrial Internet data plays a key role in the development of the industrial Internet ecology and enterprises. Therefore, the industrial Internet needs to have strong data protection capabilities.

In the industrial Internet identification resolution system, machines, products, etc. are identified and coded, and identification query requests are sent to the identification resolution server to obtain the storage location of machine/product information, and then reach the information storage server through a network connection. After obtaining the required information, complete Query information response.

At present, there are different standard IoT coding schemes in the Internet of Things, that is, products of different systems will have different coding systems, and a unified IoT coding and identification system has not yet been established, for example: such as EPC, Ucode, Object Identifier (hereinafter referred to as "ObjectIdentifier") OID) etc.

(1) EPC

EPC is a globally unique code assigned to each entity object based on radio frequency identification (Radio Frequency Identification, hereinafter referred to as RFID) and the Internet, which can encode each item and is currently mainly used in the field of logistics supply chain.

The general structure of EPC coding consists of a fixed-length header (Header) and a series of field values following it. The length, structure and function of the field value are all determined by the value of the Header. The EPC encoding length based on Gen1 tag technology includes 64 bits and 96 bits, while the EPC encoding length based on Gen2 tag technology is mainly 96 bits. 195-bit, 170-bit, 202-bit, 113-bit, etc.

To support coding schemes for different identification needs in various industries, EPC coding based on Gen2 tag technology includes the following types:

a) Generic Identification Type (GID);

b) GS1 system identification type (compatible with existing GS1 codes), including:

- Serialized Global Transaction Item Identifier (SGTIN);

- Serialized Shipping Container Identification (SSCC);

- Global Address Identification (GLN);

- Global Recyclable Asset Identification (GRAI);

- Global Individual Asset Identification (GIAI);

- Global Service Relationship Identification (GSRN);

- Global Document Type Identifier (GDTI);

c) DOD identification type dedicated to the US Department of Defense.

Taking SGTIN-96 as an example, the coding structure of GS1 identification type is as follows:

in:

-Header: encoding format name, such as SGTIN, SSCC, GLN, etc.;

-Filter Value: Basic logistics types for quick filtering and pre-selection of identified items, such as trade types, inner packaging, boxes, pallets;

-Partition: Indicates how to separate the subsequent information parts;

-Company Prefix: GS1 company code;

-Item Reference: Indicates the company's product category;

-Serial Number: Product serial number.

(2) Ucode

Ucode is a code adopted by the Unique Identifier (Unique Identifier, hereinafter referred to as UID) system proposed by Japan, which mainly encodes physical entities and locations.

The identification structure of Ucode is "encoding category identification + encoding content (variable length) + item unique identification". The basic code length of Ucode is 128 bits, which can be extended to 256 bits, 384 bits or 512 bits in units of 128 bits as needed. The biggest feature of Ucode is the meta-coding design that can accommodate various existing coding systems, and can be compatible with a variety of codes including EAN, UPC, JAN, ISBN, IPv6 address, phone number, etc.

(3) OID

OID is an identification system defined in the International Organization for Standardization (hereinafter referred to as ISO)/International Electrotechnical Commission (hereinafter referred to as IEC) 8824 and ISO/IEC9834 series standards. An OID is a globally unique value associated with an object that is used to unambiguously identify the object. The name identification of the object ensures that the object is correctly located and managed in communication or information processing.

The OID identifier is registered in a tree structure, and the object is identified by the path from the tree root to the node. The representation method has three forms: OID numeric value, OID alphanumeric value, and OID Internationalized Resource Identifier (OID-IRI). When expressed in digital form, different levels are separated by ".", and the numerical value of each level is a positive integer greater than 0, and the value is unique within the scope of the registration authority, such as {2.17.2.3}. When expressed in alphanumeric form, the name of each level is a variable-length string of no less than 1 character, such as {joint-iso-itu-t(2)registration-procedures(17)document-types(2) binary(3)}. When represented in internationalized form, Unicode characters are supported, that is, characters from any language, not just English characters, can be used, such as "/Joint-ISO-ITU-T/Registration-Procedures/DocumentTypes/Binary".

At present, industrial Internet identification analysis faces severe challenges in terms of efficiency, heterogeneous compatibility, and security.

Since the identification resolution system obtains the address of the information of the object according to the identification of the object, the identification needs to be resolved into an address, such as an IP address, and then the information request is routed by the network to the device storing the information. The entire process of acquiring information and data needs to rely on two systems: the identification resolution system and the network routing system. To a certain extent, there is a problem of complex and redundant systems, resulting in low content acquisition efficiency. In addition, data security needs to be in the two systems. Taking both into account, it is difficult to ensure the security of the entire system.

Since the current identification analysis system has not been unified, there are various identification analysis systems at home and abroad. For the unified data specification of the same industry, there are also certain differences in the business standard specification of the identification technology used by the systems applied by various enterprises in the industry. There may be conflicts between different identities. If there is a lack of compatibility with heterogeneous identities, it will be difficult to achieve interconnection between IoT applications using different identities. With the deepening of the application of the Internet of Things, the cross-system, cross-platform, cross-regional information interaction, coordination and information sharing between heterogeneous systems will gradually increase, and it has become a consensus to solve the problem of heterogeneous compatibility of identification systems.

The existing unified IoT coding and identification system (for example, Ecode) is compatible with different coding standards by standardizing the coding structure. On this basis, a Distinguished Name Resolve Service (DNRS) server is established to realize the resolution method. compatible. But Ecode still relies on the parsing server, and the problem of complex and redundant system becomes more and more obvious.

SUMMARY OF THE INVENTION

In order to solve the problems in the above-mentioned background technology, the purpose of the present invention is to provide a method for predicting the meteorological parameter MVD through the icing thickness of the wing based on the BP neural network, and design the fusion architecture of the industrial Internet identification analysis system and the network routing system to realize The overall structure of the Industrial Internet is flattened, which improves the efficiency of information acquisition, improves network scalability, and improves the security of Industrial Internet data.

The ICN-based industrial Internet identification analysis system and method of the present invention are as follows:

An ICN-based industrial Internet identification analysis system, the identification analysis system includes an ICN-based router, an information data storage server, and an identification name-content name conversion module; wherein,

The identification name-content name conversion module is used to convert the identification name that needs to be queried into the naming format of the ICN network, i.e. obtain the ICN identification name, to realize that the identification query request is forwarded in the ICN network;

The ICN router is used to complete the forwarding of interest packets (Interest packet) and data packets (Data packet), and store the passed data packets in the local cache;

The information data storage server is a storage server of the ICN identification name and its corresponding information, and is used for responding to the identification query request.

Further, the identification resolution system is based on the NDN network; wherein, the identification name-content name conversion module is used to convert the identification name that needs to be queried into the naming format of the NDN network, that is, to obtain the NDN identification name, to realize the identification query request. Forwarding in the NDN network;

The NDN router is used to complete the forwarding of interest packets (Interest packet) and data packets (Data packet), and store the passed data packets in the local cache;

The information data storage server is a storage server of the NDN identifier and its corresponding information.

Further, the identification name-content name conversion module performs a job before the request packet is connected to the NDN network, and it unifies various identification code separators in the industrial Internet identification resolution system into a "/" separator; the NDN The identifier name is prefixed with the specific identifier encoding name.

As a preference, various identification codes in the industrial Internet identification resolution system include EPC, Ucode, and OID codes.

The present invention also provides a data access method according to the above-mentioned ICN-based industrial Internet identification resolution system, the data access method comprising the following steps:

Step 1, register and broadcast various identification codes in the industrial Internet identification resolution system on the information data storage server, and convert the identification codes into NDN identification names through the identification name-content name conversion module;

In step 2, a terminal initiates an identification query request, that is, when initiating a query for product information, the NDN router forwards the interest packet to the node where the information is located according to the standard NDN node processing model, and the acquired data packet is returned to the terminal along the way, and is based on the standard NDN node processing model. The local caching strategy caches this data packet, thereby completing the acquisition of product information under this identifier in the NDN network;

In step 3, another terminal queries the information of the same product, obtains the product's identification name and converts it into an NDN identification name, constructs an interest packet and sends it to the NDN network; when the interest packet reaches the storage node in step two, it directly Returns the data packet to complete the ID query request response.

Further, the step 2 is specifically:

Step 2.1, the first terminal initiates an information query to obtain the first product, converts the first product identifier into an NDN identifier through a local identifier-content name conversion module, constructs a corresponding interest packet, and sends the interest packet to NDN in the network;

Step 2.2, when the NDN router receives the Interest packet, the NDN router processes and forwards the Interest packet according to the standard NDN node processing model. First, it searches in the local cache. If it is found, it returns the data packet immediately, otherwise it relies on the PIT and FIB protocols. forward this Interest packet;

Step 2.3, this interest packet arrives at the information data storage server, the information data storage server searches according to the NDN identifier, if not found, then discards the interest packet; if found, returns the data packet to the NDN router;

Step 2.4, when the NDN router receives the data packet, the NDN router returns the data packet along the way to the first according to the standard NDN node processing model, and caches the data packet according to the local cache policy.

Further, the process of registering and broadcasting various identifier codes in the industrial Internet identifier resolution system on the information data storage server mentioned in the step 1 is specifically:

When a new NDN identification name and its corresponding information content are to be registered and stored in the information storage server, firstly, the NDN identification name to be registered is searched in the identification names of all entries of the information storage server. If it exists, it means the NDN identification If the name already exists in the information storage server, the information content update operation is performed;

If it does not exist, an entry is added in the information storage server to record the NDN identification name and information content, and the NDN identification name corresponding to the identification name is obtained according to the conversion rules in the identification name-content name conversion module.

Further, in the step 2.2, the NDN router processes and forwards the Interest packets according to the standard NDN node processing model, specifically:

When an NDN identifier interest packet arrives at the information storage server, the information storage server searches the NDN identifiers of all local entries for the NDN identifier of the requested interest packet, and if it exists, returns the corresponding information content in the form of a data packet to the Information query node; if not present, discard this Interest.

Further, in the step 2.3, the information data storage server searches according to the NDN identifier, specifically:

When an identity query interest packet arrives at the NDN router, the NDN router searches for the NDN identifier name of the request interest packet in the NDN identifier names of all entries in the local cache. Query the node terminal; if it does not exist, continue the subsequent operation of the NDN router.

Further, in the step 2.4, the specific process of caching this data packet according to the local cache policy is:

When an identification query result packet arrives at the NDN router, the NDN router searches for the NDN identification name of the data packet in the NDN identification names of all entries in the local cache. If it exists, it means that the identification name already exists in the local cache. Cache; if it does not exist, the NDN identifier and information content of this data packet are stored in the local cache according to the cache replacement policy.

The technical solution realizes the integration of industrial Internet identification resolution and routing based on NDN. By introducing ICN technology into the Industrial Internet, it can realize the ability of industrial Internet network connection and identification resolution at the same time, flatten the overall structure of the Industrial Internet, improve the efficiency of information acquisition, improve network scalability, and improve the security of industrial Internet data. At the same time, because the deployment of the parsing server is omitted, the solution can effectively solve the heterogeneous incompatibility problem of industrial Internet identification parsing.

Description of drawings

Figure 1 (a) is a seven-layer structure diagram of the traditional Internet, and (b) is a seven-layer structure diagram of an NDN network;

Figure 2 is a structural diagram of the hierarchical naming method of NDN;

Fig. 3 is a flow chart of packet processing on an NDN node;

Fig. 4 is the structure diagram of Interest package and Data package;

Fig. 5 is the current DNS-based identity resolution system architecture;

FIG. 6 is an architectural diagram of an NDN-based industrial Internet identification resolution system according to the present invention;

Fig. 7 is a communication flow chart of the data access method of the NDN-based industrial Internet identification resolution system of the present invention.

Detailed ways

The present invention is described in detail below in conjunction with the accompanying drawings:

Information Centric Networking (ICN) can meet the above requirements, and its core idea is to replace the traditional address-centric network communication model with information naming to realize information search and information acquisition by users. This solution introduces ICN into the Industrial Internet, which can realize the ability of industrial Internet network connection and identification resolution at the same time, flatten the overall structure of the Industrial Internet, improve the efficiency of information acquisition, improve network scalability, and improve the security of industrial Internet data.

The core idea of the information-centric network is to replace the traditional address-centric network communication model with information naming to realize information search and information acquisition by users. The idea of ICN was first proposed by Nelson in 1979 and later reinforced by Baccal. Since the idea of information center network was put forward, countries all over the world have deployed and launched a series of related research projects. The American academic community took the lead in launching research on content-oriented network architecture related projects, including CCN, NDN, DONA (Data-Oriented Network Architecture), etc. Subsequently, the European Union also successively launched research on NetInf, PURSUIT/PSIRP, Point and other related projects. The following uses NDN as an example to introduce.

(1) Named Data Networking (NDN)

In 2009, Jacobson of the PARC Research Center proposed Content Centric Networking (CCN) and launched the CCNx project. The Named Data Network is an engineering project based on the idea of CCN. It is one of the scientific research projects in the future Internet architecture announced by the Natural Science Foundation of the United States in August 2010. NDN strives to change the current host-based peer-to-peer communication architecture of the Internet and realize the transition to a new network architecture centered on named data. NDN shifts focus from "where" to "what" of existing networks, i.e. what users and applications care about, explores content/service-centric network architecture; decouples content from securing hosts , which directly protects the content and makes the communication mechanism fundamentally scalable; its architecture adopts name routing, referring to the hourglass model of the current IP network, and places the content block instead of IP in the waist part, while the original IP layer moves down, and By signing all named data, a basic security module is built in the waist part, which supports the prosperity and development of all layers beyond the network layer while realizing global interconnection. However, its routing is completely dependent on the content name, which also brings routing scalability issues.

The naming mechanism of NDN is hierarchical naming. This naming method is similar to URL. With "/" as the separator, nodes in the network can receive, identify, and forward the received content according to the longest matching principle. At the same time, the naming adopts hierarchical clustering to facilitate the naming of network nodes, which can be understood as merging similar items, which is also convenient for searching. For example, searching for /beijing/videos/ndn.mp4/v1 will first search under /beijing, and the data starting with this name has been gathered together. The good aggregation capability enables NDN to process massive data, and it can also solve some of the burdens caused by the naming center, that is, the amount of content on the entire network is much larger than the number of hosts, and the scale of content-oriented addressing will be larger than that of host-oriented addressing. But hierarchical naming is generally less secure.

The basic node structure of an NDN network router includes two tables and a content buffer pool: a PIT table (Pending Interest Table), a FIB table (Forwarding Information Base), and a content buffer pool CS (Content Store). The process is shown in Figure 3.

The structures of the Interest package and the Data package are shown in Figure 4. The Name in both the Interest package and the Data package refers to the name of the content block to be requested. The user puts the name of the content block to be requested into the Interest package, and the packaged Interest package is sent to the NDN network; the NDN node router forwards the Interest package to the node containing the content according to the Name in the Interest package; once the Interest package reaches a The node containing the requested content, this node will return a Data package containing the requested content and its signature information; the Data package will return along the opposite path to the Interest package, until the Data package reaches the content requesting end, and the user gets the desired request content.

When an Interest packet arrives, NDN Router first checks whether the content block requested in the Interest packet has been cached in the CS cache. If so, the Router generates a Data packet containing the content block and forwards it from the inbound port of the Interest packet; if If not, check whether there is the same content block request in the PIT. If so, just add the inbound port number of the Interest package to the inbound port number item of the corresponding entry; if not in the PIT, add an entry in the PIT. New entry, record the content block name and inbound port number of the Interest packet, and forward or discard the Interest packet according to the FIB table and specific forwarding policy, and return NACK. It is particularly pointed out that for multiple Interest packages requesting the same content block, the PIT table only establishes an entry to record the content block and the inbound port number of these Interest packages, and only the first arriving Interest requesting this content block is required. packets are forwarded.

When a Data packet arrives, NDN Router first searches the PIT table for the PIT entry corresponding to the content block in the Data packet. If it is not found, it directly discards the Data packet; if found, it records the Data packet from this PIT entry. All Interest packets are forwarded to the port, and the PIT entry is deleted and the content of the Data packet is cached in the CS.

Each NDN node performs the above-mentioned processing process on the Interest package and the Data package, so as to realize the content acquisition requirement of the content requester. If different caching strategies and forwarding strategies are implemented in NDN nodes, the network can achieve different optimization effects.

ICN realizes the separation of content and location with its name-based routing, which greatly facilitates the transmission and forwarding of information. Therefore, ICN provides a platform for efficient content distribution. Compared with traditional IP networks, its core advantages are:

(1) Content naming: Name the content directly, decouple the content from the location information, and implement content-based routing. On the other hand, because the address space for content naming is infinite, it can effectively solve the problem of IP address exhaustion when the number of terminals in the IoT environment is large.

(2) In-network caching: Due to the decoupling of content and specific geographic locations brought about by content naming, it becomes feasible to cache content copies in the network, using the space resources cached in the network to exchange time benefits, reducing content response time and saving bandwidth .

(3) Mobility support: ICN network is a request/response model that supports content without establishing and maintaining connections. One of the benefits brought by this is that it is more suitable for mobility. When the request packet passes through the router in the ICN network, the router will automatically record the trace of the request packet, and the data packet will be returned to the user according to the trace. When the client moves, a new trajectory will be generated again, so the network does not need to maintain the location information of the client, supports the mobility of the host, and solves the problem of efficient transmission of massive information. Compared with end-to-end IP communication, which is difficult to solve in terms of mobility, ICN's connectionless communication provides a good foundation for seamless mobility handover. Meanwhile, in-network caching helps reduce content response delays.

(4) Network layer security: The information center network takes security into consideration at the beginning of its design. By directly protecting the content itself, the security mechanism of ICN is more robust than that of IP. In traditional IP networks, security depends on whether the host is trustworthy. If the host is untrustworthy, the information stored on the host is considered untrustworthy. However, the security of information is not necessarily related to the host where the information is stored. Starting from information, ICN directly implements security measures on information, so the granularity of security policies can be coarse or fine.

Therefore, the information-centric network adopts the information naming method to replace the traditional address-centric network communication model, which can solve some inherent problems in the IP network and meet the user's needs for accessing massive information.

Identification resolution is the key technology to realize unique identification, location, addressing and routing of users and devices. With the vigorous development of the Industrial Internet, the use of public identifiers to standardize coding of various resources has become the basis for information sharing and the promotion of industrial intelligence. Several mainstream public encoding methods can be summarized into a unified logical model, including prefix fields, suffix fields, and optional security fields.

The architecture of the current DNS-based identification resolution system is shown in Figure 5, in which the identification resolution server can query the network location or related information stored by the target object according to the identification code, and perform unique positioning and information query for machines and items; information data storage A server is a server that stores machine and item information.

Example 1

The ICN-based industrial Internet identification resolution system provided by the present invention realizes the decoupling of content and specific network nodes through content naming and in-network caching. Specifically, the NDN network uses the content-name-based routing algorithm to implement content-name-based routing forwarding without requiring the DNS server to query the server location. The above characteristics of the NDN network provide an effective solution for the integration of industrial Internet identification resolution and network routing. The system architecture is shown in Figure 6.

The identification name-content name conversion module is responsible for converting the identification name to be queried into the naming format of the NDN network, that is, to obtain the NDN identification name, so as to realize the forwarding of the identification query request in the NDN network. The NDN router is responsible for the forwarding of Interest packets and Data packets, and stores the passing data packets in the local cache. The information data storage server is the storage server of the NDN identifier and its corresponding information.

The identity query request first needs to construct an Interest packet conforming to the NDN network naming format before accessing the NDN network, so that the Interest packet can be forwarded in the NDN network. Until the NDN identification name is found in the NDN router cache or in the information storage server, and the information data corresponding to the NDN identification name is returned to the identification query requesting node in the opposite direction of the interest packet in the form of data packets, and the machine/product is completed. and other information query responses.

(1) Identification name-content name conversion module

In order to integrate identity resolution and NDN networks, it is imperative to realize the unified integration of NDN naming and identifier names.

Since the naming method of NDN is hierarchical, and the existing identification encoding methods include different parts; in addition, the naming and identification encoding of NDN are both indefinite-length naming, so NDN naming is very suitable for compatibility with multiple identification encoding methods.

Specifically, since each part of the hierarchical naming of NDN is separated by "/", and the separators of different identification encoding methods are not the same, the main function of the identification name-content name conversion module is to convert various different The identifier encoding separator is unified as "/" separator. In addition, the NDN identifier also uses the specific identifier code name as a prefix to avoid code naming conflicts between different identifier encoding systems, and at the same time enhances the aggregation of the NDN identifier and improves query efficiency. It should be noted that the identification name-content name conversion module is executed before the request packet is connected to the NDN network, such as a terminal device.

Take EPC, Ucode, and OID as examples below:

1) EPC

The coding structure of an EPC is as follows:

Table 1

Convert to NDN distinguished name: /EPC/Header/Filter Value/Partition/Company Prefix/Item reference/Serial Number.

2) Ucode

The identification structure of Ucode is "encoding category identification + encoding content (variable length) + item unique identification".

Convert to NDN identifier: /Ucode/encoded category identifier/encoded content/item unique identifier.

3) OID

The OID representation method has three forms: OID numerical value, OID alphanumeric value, and OID Internationalized Resource Identifier (OID-IRI). When expressed in numerical form, separate levels with ".", such as {2.17.2.3}.

Converted to NDN distinguished name: /OID/2/17/2/3.

Alphanumeric representation, eg {joint-iso-itu-t(2)registration-procedures(17)document-types(2)binary(3)}.

Converted to NDN distinguished name: /OLD/joint-iso-itu-t(2)/registration-procedures(17)/document-types(2)/binary(3).

Internationalized form representation, eg "/Joint-ISO-ITU-T/Registration-Procedures/DocumentTypes/Binary".

Convert to NDN distinguished name: /OID/Joint-ISO-ITU-T/Registration-Procedures/DocumentTypes/Binary.

(2) Heterogeneous compatible information storage server and network cache design

1) Information storage server

Since the identification name is uniformly transformed by the identification name-content name conversion module before entering the NDN network, the registration of the identification name in the information storage server should also include the converted NDN identification name.

Each record in the information storage server contains identifier, NDN identifier, and information content, and its format is:

Table 2

identifier NDN Distinguished Name information

The process of registering a distinguished name in the information store server is:

a. When a new identification name and its corresponding information content are to be registered and stored in the information storage server, firstly, search for the identification name to be registered among the identification names of all entries of the information storage server. If it exists, it means that the identifier already exists in the information storage server, and the information content update operation is performed.

b. If it does not exist, add a new entry in the information storage server, record the identification name and information content, and obtain the NDN corresponding to the identification name according to the conversion rules in the identification name-content name conversion module in (1). Identifier name. Since the same identification name conversion rule is adopted, the NDN identification name stored in the server is consistent with the NDN identification name converted during the identification query request.

When the Identity Query Interest arrives at the information storage server, the information storage server performs a lookup operation. The process of looking up the distinguished name in the information store server is:

a. When an NDN Identifier Interest arrives at the information storage server, the information storage server searches the NDN identifiers of all local entries for the NDN identifier of the requesting Interest. If it exists, the corresponding information content is returned to the information query node in the form of a data packet (the name of the data packet is still the NDN identification name of the corresponding interest packet).

b. If not present, discard this Interest.

2) In-network cache

The in-network cache stores the local data packets in the local cache according to the cache policy. When the same NDN identifier is requested subsequently, the local cache can directly respond to the request, thereby improving network efficiency and saving network resources. Each record in the local cache contains NDN identifier and information content in the following format:

table 3

NDN Distinguished Name information

When an Identity Query Interest packet arrives at the NDN router, the NDN router first performs a lookup operation in the local cache. The specific process is as follows:

a. When an Identity Query Interest arrives at the NDN router, the NDN router searches the NDN identifiers of all entries in the local cache for the NDN identifier of the Request Interest. If it exists, the corresponding information content is returned to the information query node in the form of a data packet (the name of the data packet is still the NDN identification name of the corresponding interest packet).

b. If it does not exist, continue with the subsequent operations of the NDN router.

When an identification query result packet arrives at the NDN router, the NDN router performs the caching operation in the local cache according to the caching policy. The specific process is as follows:

a. When an ID query result packet arrives at the NDN router, the NDN router searches the NDN ID of all entries in the local cache for the NDN ID of the packet. If it exists, it means that this distinguished name already exists in the local cache and is not cached.

b. If it does not exist, store the NDN identifier and information content of the data packet in the local cache according to the cache replacement policy.

Example 2

Based on the above-mentioned industrial Internet identification resolution system, a complete identification query request and response process is introduced below, as shown in Figure 7. The specific process is as follows:

A. Information data storage server registration and broadcast

a. When giving the product 1 logo, it needs to be registered in the information data storage server. The specific registration process is as described in (1) (2). The registration result is:

Table 4

{2.17.2.3} /OID/2/17/2/3 Product 1 Information

b. The information data storage server broadcasts the locally stored NDN identifier, so that the NDN network can perform routing and forwarding according to the NDN identifier.

B. Terminal 1 requests identification query

a. Terminal 1 obtains the identification name ({2.17.2.3}) of product 1, and converts the identification name ({2.17.2.3}) into the NDN identification name (/OID/2/17) through the local identification name-content name conversion module /2/3), and construct a corresponding interest packet, and send this interest packet to the NDN network.

b. When the NDN router receives the Interest packet, the NDN router processes and forwards the Interest packet according to the standard NDN node processing model, that is, first searches in the local cache (the specific search process is described in (1) (2)) , if found, return the data packet immediately, otherwise rely on PIT and FIB to forward the interest packet.

c. This interest packet reaches the information data storage server through R1 and R2. The information data storage server searches according to the NDN identifier (the specific search process is described in (1) (2)). If not found, discard the Interest; if found, return a data packet (/OID/2/17/2/3).

d. When the NDN router receives the data packet, the NDN router returns the data packet to Terminal 1 along the way according to the standard NDN node processing model, and caches the data packet according to the local caching policy (the specific caching process is as follows (1) (2) described in). The entry in the local cache is:

table 5

/OID/2/17/2/3 Product 1 Information

C. Terminal 2 requests identification query

a. Terminal 2 also wants to query the information of this product. By obtaining the identification name of product 1 and converting it into an NDN identification name, it constructs an interest packet and sends it to the NDN network.

b. When the interest packet reaches R1 through R3, since the product information has been stored in the local cache of R1, the data packet (/OID/2/17/2/3) can be returned directly.

c. The data packet is returned to the terminal 2 from R1 through R3, and the response to the identification query request is completed.

D. Support Heterogeneous Compatibility

a. When product 1 has an identification name with other identification standards, this identification name also needs to be registered in its corresponding information data storage server, and the information data storage server broadcasts the registered information.

b. When a terminal wants to obtain the product information under this logo, the logo name-content name conversion module (the format and conversion rules of this logo standard have been installed) will convert the logo name to the NDN logo name, so that in the NDN network Get product information under this logo.

The technical solution realizes the integration of industrial Internet identification resolution and routing based on NDN. By introducing ICN technology into the Industrial Internet, it can realize the ability of industrial Internet network connection and identification resolution at the same time, flatten the overall structure of the Industrial Internet, improve the efficiency of information acquisition, improve network scalability, and improve the security of industrial Internet data. At the same time, because the deployment of the parsing server is omitted, the solution can effectively solve the heterogeneous incompatibility problem of industrial Internet identification parsing.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, several improvements can be made without departing from the principles of the present invention, and these improvements should also be regarded as the present invention. scope of protection.

Claims (10)

1. based on the industrial Internet identification analysis system of ICN, it is characterized in that: described identification analysis system comprises based on ICN router, information data storage server, identification name-content name conversion module; Wherein, The identification name-content name conversion module is used to convert the identification name that needs to be queried into the naming format of the ICN network, i.e. obtain the ICN identification name, to realize that the identification query request is forwarded in the ICN network; Described ICN router is used for completing the forwarding of Interest packet Interest packet and data packet Data packet, and the data packet passing through is stored in the local cache; The information data storage server is a storage server of the ICN identification name and its corresponding information, and is used for responding to the identification query request. 2. The ICN-based industrial Internet identification resolution system according to claim 1, wherein the identification resolution system is based on NDN network; wherein, the identification name-content name conversion module is used for the identification name that needs to be queried Convert to the naming format of the NDN network, that is, to obtain the NDN identification name, so as to realize the forwarding of the identification query request in the NDN network; The NDN router is used to complete the forwarding of the Interest packet and the data packet Data packet, and the passed data packet is stored in the local cache; The information data storage server is a storage server of the NDN identifier and its corresponding information. 3. The ICN-based industrial Internet identification resolution system according to claim 2, wherein the identification name-content name conversion module performs an operation before the request packet is connected to the NDN network, and it converts the industrial Internet identification analysis system into the system. Various identification code separators are unified into a "/" separator; the NDN identification name takes the specific identification code name as a prefix. 4. The ICN-based industrial Internet identification analysis system according to any one of claims 1 to 3, characterized in that: various identification codes in the industrial Internet identification analysis system include EPC, Ucode, and OID codes. 5. the data access method of the ICN-based industrial Internet identification resolution system according to claim 1, is characterized in that: described data access method comprises the following steps: Step 1, register and broadcast various identification codes in the industrial Internet identification resolution system on the information data storage server, and convert the identification codes into NDN identification names through the identification name-content name conversion module; In step 2, a terminal initiates an identification query request, that is, when initiating a query for product information, the NDN router forwards the interest packet to the node where the information is located according to the standard NDN node processing model, and the acquired data packet is returned to the terminal along the way, and is based on the standard NDN node processing model. The local caching strategy caches this data packet, thereby completing the acquisition of product information under this identifier in the NDN network; In step 3, another terminal queries the information of the same product, obtains the product's identification name, converts it into an NDN identification name, constructs an interest packet and sends it to the NDN network; when the interest packet reaches the storage node in step two, it directly Returns the data packet to complete the ID query request response. 6. data access method according to claim 5, is characterized in that: described step 2 is specifically: Step 2.1, the first terminal initiates an information query to obtain the first product, converts the first product identifier into an NDN identifier through a local identifier-content name conversion module, constructs a corresponding interest packet, and sends the interest packet to NDN in the network; Step 2.2, when the NDN router receives the Interest packet, the NDN router processes and forwards the Interest packet according to the standard NDN node processing model. First, it searches in the local cache. If it is found, it returns the data packet immediately, otherwise it relies on the PIT and FIB protocols. forward this Interest packet; Step 2.3, this interest packet arrives at the information data storage server, the information data storage server searches according to the NDN identifier, if not found, then discards the interest packet; if found, returns the data packet to the NDN router; Step 2.4, when the NDN router receives the data packet, the NDN router returns the data packet along the way to the first according to the standard NDN node processing model, and caches the data packet according to the local cache policy. 7. The data access method according to claim 6, characterized in that: in the step 1, various identification codes in the industrial Internet identification analysis system are registered and broadcast in the information data storage server. for: When a new NDN identification name and its corresponding information content are to be registered and stored in the information storage server, firstly, the NDN identification name to be registered is searched in the identification names of all entries of the information storage server. If it exists, it means the NDN identification If the name already exists in the information storage server, the information content update operation is performed; If it does not exist, an entry is added in the information storage server to record the NDN identification name and information content, and the NDN identification name corresponding to the identification name is obtained according to the conversion rules in the identification name-content name conversion module. 8. data access method according to claim 6, is characterized in that: in described step 2.2, NDN router carries out processing and forwarding of interest packet according to standard NDN node processing model specifically: When an NDN identifier interest packet arrives at the information storage server, the information storage server searches the NDN identifiers of all local entries for the NDN identifier of the requested interest packet, and if it exists, returns the corresponding information content in the form of a data packet to the Information query node; if not present, discard this Interest. 9. data access method according to claim 6, is characterized in that: in described step 2.3, the information data storage server searches according to NDN identifier name specifically: When an identity query interest packet arrives at the NDN router, the NDN router searches for the NDN identifier name of the request interest packet in the NDN identifier names of all entries in the local cache. Query the node terminal; if it does not exist, continue the subsequent operation of the NDN router. 10. The data access method according to claim 6, characterized in that: in the step 2.4, the specific process of caching this data packet according to the local cache policy is: When an identification query result packet arrives at the NDN router, the NDN router searches for the NDN identification name of the data packet in the NDN identification names of all entries in the local cache. If it exists, it means that the identification name already exists in the local cache. Cache; if it does not exist, the NDN identifier and information content of this data packet are stored in the local cache according to the cache replacement policy.

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