CN111611613A

CN111611613A - ICN-based industrial internet identification analysis system and data access method

Info

Publication number: CN111611613A
Application number: CN202010354793.2A
Authority: CN
Inventors: 谢人超; 李肖璐; 黄韬; 刘江; 刘韵洁
Original assignee: Network Communication and Security Zijinshan Laboratory
Current assignee: Network Communication and Security Zijinshan Laboratory
Priority date: 2020-04-28
Filing date: 2020-04-28
Publication date: 2020-09-01
Anticipated expiration: 2040-04-28
Also published as: WO2021218068A1; CN111611613B

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 industrial internet, in particular to an ICN-based industrial internet identification analysis system and a data access method.

Background

The industrial internet is oriented to the digital, networking and intelligent requirements of the manufacturing industry, constructs a service system based on the acquisition, aggregation and analysis of mass data, supports an industrial cloud network with ubiquitous connection, elastic supply and efficient configuration of manufacturing resources, and is an important basis for the construction of the strong country and the network strong country in China. The final aim is to realize the intellectualization of enterprises and help China to change from a large manufacturing country to a strong manufacturing country.

The industrial internet architecture contains four main aspects: a network connection framework, a platform framework, a security architecture and an identification resolution framework. The network connection is an important basis for realizing the industrial internet layout, and the network core of the industrial internet is to connect the whole industrial system, break an information island, ensure barrier-free transmission of data among different devices and systems, and further form a systematic intelligent system. The identification analysis system is a key hub connected with industrial elements, is responsible for providing services such as identification registration, management, analysis and the like, and is a key for realizing industrial data intercommunication. The identification analysis system consists of an identification code and an analysis system. Wherein, the identification code is used as an 'identity card' for uniquely identifying the equipment; the resolution system then uses the identification to uniquely locate, address and query the device for information. At present, various identification analysis systems exist in the world, such as an EPCglobal system, an OID system, a Handle system, an Ecode system, a UID system and the like. The development of an industrial internet identification resolution system provides support for public service and information sharing.

At present, the industrial internet needs to realize the aspects of high efficiency, heterogeneous compatibility, safety and the like. In order to support the differentiation requirements of low time delay, real-time feedback and the like of industrial internet application, the high efficiency of identification analysis and routing addressing is required. Because the current identification analysis system is not unified, various identification analysis systems exist at home and abroad. With the development of industrial internet, future industrial internet systems must be heterogeneous, multi-level and distributed. The security of the data of the industrial internet plays a critical role in the ecology of the industrial internet and the development of enterprises, so that the industrial internet needs to have a robust data protection capability.

In an industrial internet identification analysis system, machines, products and the like are subjected to identification coding, an identification query request is sent to an identification analysis server to obtain the storage position of machine/product information, then the machine/product information reaches an information storage server through network connection, and query information response is completed after required information is obtained.

The internet of things coding schemes with different standards exist in the current internet of things, namely, products with different systems have codes with different systems, and a unified internet of things coding identification system is not established, for example: such as EPC, Ucode, object identifier (OID for short hereinafter), etc.

(1)EPC

The EPC is a globally unique code assigned to each entity object based on Radio Frequency Identification (RFID) and Internet, and can realize encoding of each single item, and is mainly applied in the field of logistics supply chains at present.

The EPC coding general structure consists of a Header (Header) with a fixed length and a series of subsequent field values, and the length, the structure and the function of the field values are determined by the value of the Header. The EPC coding length based on the Gen1 tag technology comprises 64 bits and 96 bits, while the EPC coding length based on the Gen2 tag technology is mainly based on 96 bits, and simultaneously, longer coding lengths are involved for different coding categories, such as 198 bits, 195 bits, 170 bits, 202 bits, 113 bits and the like.

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

a) a generic identification type (GID);

b) the GS1 system identification type (compatible with the existing GS1 coding) comprises:

-serialized global transaction item identification (SGTIN);

-serialized shipping container identification (SSCC);

-global address identification (GLN);

-Global Recoverable Asset Identification (GRAI);

-Global Individual Asset Identification (GIAI);

-global service relationship identification (GSRN);

-global file type identification (GDTI);

c) DOD identification type specific to the united states department of defense.

Taking SGTIN-96 as an example, GS1 identifies the type code structure as follows:

wherein:

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

-Filter Value: basic logistics types for rapid filtering and preselection of identified items, such as trade types, inner packages, boxes, trays;

-Partition: indicating how subsequent portions of information are separated;

-Company Prefix: GS1, inc;

-Item Reference: indicating a company product category;

-Serial Number: the product serial number.

(2)Ucode

Ucode is a code used by a Unique Identifier (UID) system proposed in japan, and mainly encodes a physical entity and a location.

The identification structure of the Ucode is 'encoding type identification + encoding content (with variable length) + unique identification of the article'. The base code length of the Ucode is 128 bits, and may be extended to 256 bits, 384 bits, or 512 bits in units of 128 bits as necessary. The Ucode is mainly characterized by being capable of accommodating the meta-code design of various existing coding systems and being compatible with various codes including EAN, UPC, JAN, ISBN, IPv6 addresses, telephone numbers and the like.

(3)OID

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

The OID mark is registered according to a tree structure, the object is marked by a path from a tree root to a node, and the representing method comprises three forms of an OID numerical value, an OID alphanumeric value and an OID international resource identifier (OID-IRI). When expressed in numerical form, the different levels are separated by ". The numerical value of each level is a positive integer greater than 0, and is unique within the scope of the registration authority, such as 2.17.2.3. In alphanumeric form, the names of each level are variable length strings of no less than 1 character, e.g., { join-iso-itu-t (2) registration-processes (17) document-types (2) binary (3) }. When the international form is expressed, Unicode characters are supported, namely characters of any language can be used instead of English characters, such as "/Joint-ISO-ITU-T/Registration-Procedures/documentTypes/Binary".

At present, the industrial internet identification resolution faces serious challenges in the aspects of high efficiency, heterogeneous compatibility, safety and the like.

Since the identifier resolution system obtains the address of the information of the object according to the identifier of the object, the identifier needs to be resolved into an address, such as an IP address, and then the information request is routed to the device storing the information by the network. The whole process of acquiring the information data can be completed only by depending on two systems, namely an identification analysis system and a network routing system, the problem of complex and redundant systems exists to a certain extent, the content acquisition efficiency is low, and in addition, the data security needs to be considered in the two systems, so that the security guarantee difficulty of the whole system is caused.

Because the current identification analysis system is not unified, various identification analysis systems exist at home and abroad. For the unified data specification of the same industry, the standard specification of the identification technology service used by the system applied by each enterprise in the industry has a certain difference. Conflicts may exist between different identifiers, and if the heterogeneous identifiers are not compatible, interconnection and intercommunication between applications of the internet of things using different identifiers are difficult to achieve. With the continuous deepening of the application of the internet of things, the information interaction between cross-systems, cross-platforms and cross-regions, the cooperation and information sharing between heterogeneous systems will gradually increase, and the solution to the problem of heterogeneous compatibility of an identification system becomes a consensus.

The existing unified internet of things coding identification system (for example, Ecode) is compatible with different coding standards through a standardized coding structure, and on the basis, a identification Name resolution Service (DNRS) server is established, so that the compatibility of the resolution method is realized. However, Ecode still depends on a resolution server, and the problem of complex redundancy of the system is more obvious.

Disclosure of Invention

In order to solve the problems in the background art, the invention aims to provide a method for predicting meteorological parameters MVD through the icing thickness of wings based on a BP neural network, and designs a fusion architecture of an industrial internet identification analysis system and a network routing system, so that the flattening of the overall architecture of the industrial internet is realized, the information acquisition efficiency is improved, the network expandability is improved, and the data security of the industrial internet is improved.

The invention discloses an ICN-based industrial internet identification analysis system and a method thereof, which comprises the following steps:

the ICN-based industrial Internet identification analysis system comprises 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 for converting the identification name to be inquired into a naming format of the ICN network to obtain the ICN identification name so as to realize the forwarding of the identification inquiry request in the ICN network;

the ICN router is used for completing forwarding of Interest packets (Interest packets) and Data packets (Data packets), and storing the passing Data packets into a local cache;

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

Further, the identifier resolution system is based on an NDN network; the identification name-content name conversion module is used for converting an identification name to be inquired into a naming format of the NDN network, so that the NDN identification name is obtained, and the identification inquiry request is forwarded in the NDN network;

the NDN router is used for completing forwarding of Interest packets (Interest packets) and Data packets (Data packets), and storing the passing Data packets into a local cache;

the information data storage server is a storage server of the NDN identification name and the corresponding information.

Further, the identification name-content name conversion module performs an operation before the request packet accesses the NDN network, which unifies various identification code delimiters in the industrial internet identification resolution system into "/" delimiters; the NDN identification name takes a specific identification code name as a prefix.

Preferably, the various identification codes in the industrial internet identification analysis system comprise EPC, Ucode and OID codes.

The invention also provides a data access method of the ICN-based industrial Internet identification analysis system, which comprises the following steps:

step one, various different identification codes in the industrial internet identification analysis system are registered and broadcasted in an information data storage server, and the identification codes are converted into NDN identification names through an identification name-content name conversion module;

step two, when a certain terminal initiates an identifier query request, namely, initiates query on product information, the NDN router forwards an interest packet to a node where the information is located according to a standard NDN node processing model, the obtained data packet is returned to the terminal along a path, and the data packet is cached according to a local caching strategy, so that the product information under the identifier is obtained in the NDN network;

step three, another terminal inquires the information of the same product, and constructs an interest packet and sends the interest packet to an NDN network by acquiring the identification name of the product and converting the identification name into the NDN identification name; and when the interest packet reaches the storage node in the step two, directly returning a data packet to finish the response of the identifier name inquiry request.

Further, the second step is specifically:

step 2.1, a first terminal initiates information query for acquiring a first product, converts the first product identification name into an NDN identification name through a local identification name-content name conversion module, constructs a corresponding interest packet and sends the interest packet to an NDN network;

step 2.2, when the NDN router receives the interest packet, the NDN router processes and forwards the interest packet according to a standard NDN node processing model, firstly, the NDN router searches in a local cache, if the NDN router finds the interest packet, the data packet is returned immediately, and otherwise, the NDN router forwards the interest packet by relying on PIT and FIB protocols;

step 2.3, the interest packet arrives at the information data storage server, the information data storage server searches according to the NDN identification name, and if the interest packet is not found, the interest packet is discarded; if the data packet is found, returning the data packet to the NDN router;

and 2.4, when the NDN router receives the data packet, the NDN router returns the data packet along the route to the first according to a standard NDN node processing model, and caches the data packet according to a local cache strategy.

Further, the registering and broadcasting various different identification codes in the industrial internet identification analysis system in the information data storage server, which is mentioned in the step one, specifically includes:

when a new NDN identification name and the corresponding information content are registered and stored in the information storage server, searching for the NDN identification name to be registered in the identification names of all entries of the information storage server, if the NDN identification name exists, indicating that the NDN identification name already exists in the information storage server, and executing information content updating operation;

if the NDN identification name does not exist, an entry is newly added in the information storage server, the NDN identification name and the information content are recorded, and the NDN identification name corresponding to the identification name is obtained according to a conversion rule in the identification name-content name conversion module.

Further, in step 2.2, the processing and forwarding of the interest packet by the NDN router according to the standard NDN node processing model specifically includes:

when an NDN identification name interest packet arrives at the information storage server, the information storage server searches for the NDN identification name of the request interest packet in the NDN identification names of all local entries, and if the NDN identification name of the request interest packet exists, corresponding information content is returned to the information query node in the form of a data packet; if not, the interest packet is discarded.

Further, in step 2.3, the searching by the information data storage server according to the NDN identification name specifically includes:

when one identification query interest packet reaches the NDN router, the NDN router searches the NDN identification names of the request interest packets in the NDN identification names of all entries in the local cache, and if the NDN identification names exist, corresponding information content is returned to the information query node terminal in the form of data packets; if not, the subsequent operation of the NDN router is continued.

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

when one identification query result data packet reaches the NDN router, the NDN router searches the NDN identification names of the data packet in the NDN identification names of all entries in the local cache, if the NDN identification names exist, the identification names are represented to be stored in the local cache, and then caching is not performed; and if the NDN identifier does not exist, storing the NDN identifier and the information content of the data packet in a local cache according to a cache replacement strategy.

The technical scheme realizes the integration of the identification analysis and the routing of the industrial internet based on the NDN. By introducing the ICN technology into the industrial Internet, the network connection and the identification analysis capacity of the industrial Internet can be realized at the same time, so that the overall architecture of the industrial Internet is flattened, the information acquisition efficiency is improved, the network expandability is improved, and the data security of the industrial Internet is improved. 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.

Drawings

FIG. 1(a) is a 7-layer structure diagram of a conventional Internet, (b) is a seven-layer structure diagram of an NDN network;

FIG. 2 is a diagram of a hierarchical naming scheme of NDN;

FIG. 3 is a flow diagram of packet processing on an NDN node;

FIG. 4 is a diagram showing the structure of an Interest packet and a Data packet;

FIG. 5 is a current DNS based identity resolution system architecture;

FIG. 6 is an architecture diagram of an NDN-based industrial Internet identity resolution system of the present invention;

FIG. 7 is a communication flow diagram of a data access method of the NDN-based industrial Internet identity resolution system according to the present invention.

Detailed Description

The invention is described in detail below with reference to the accompanying drawings:

an Information Centric Networking (ICN) can meet the above requirements, and its core idea is to use an Information naming mode to replace the traditional address-Centric network communication model to implement Information search and Information acquisition for users. The scheme introduces the ICN into the industrial Internet, and can simultaneously realize the network connection of the industrial Internet and the capability of identification analysis, so that the overall architecture of the industrial Internet is flattened, the information acquisition efficiency is improved, the network expandability is improved, and the data security of the industrial Internet is improved.

The core idea of the information center network is that a traditional address-centered network communication model is replaced by an information naming mode to realize information search and information acquisition by a user. The ICN concept was first proposed by Nelson in 1979 and later reinforced by Baccal. Since the information center network idea is proposed, countries in the world are arranged in a dispute, and a series of related project researches are started. The american academy of academic circles have first initiated research on related items of content-Oriented Network architectures, including CCN, NDN, DONA (Data-Oriented Network Architecture), etc., and subsequently the european union has also initiated research on related items of NetInf, pursit/PSIRP, Point, etc. NDN is used as an example for the description.

(1) Named Data Network (NDN)

Jacobson of the 2009 PARC research center proposed a Content Centric Networking (CCN) and developed the CCNx project. The named data network is an engineering project based on the CCN idea, and is one of scientific research projects in the aspect of future internet architecture supported by the United states science foundation in 2010, 8 months. NDN seeks to change the current Internet host-based peer-to-peer communication architecture, and realizes the transition to a new network architecture centered on named data. NDN shifts the focus of attention from "where" to "what" of existing networks, i.e., the content that users and applications are interested in exploring content/service-centric network architectures; decoupling the content from the protection host to directly protect the content, and fundamentally realizing the expandability of a communication mechanism; the architecture adopts name routing, refers to the hourglass model of the current IP network, places content blocks in the thin waist part instead of IP, moves down the original IP layer, constructs a basic security module in the thin waist part in a mode of signing all naming data, and supports the prosperous development of layers except the network layer while realizing the global interconnection. However, its routing is completely dependent on the content name, which also raises routing scalability issues.

The naming mechanism of the NDN is hierarchical naming, the naming mode is similar to that of a URL, and the node in the network can receive, recognize and forward the received content according to the longest matching principle by taking "/" as a separator. Meanwhile, the naming adopts a hierarchical clustering which is convenient for the naming of the network nodes, so that the same kind of items can be understood to be combined, and the searching is also convenient. For example, the lookup/beijing/video/ndn. mp4/v1 will first go to/beijing to find, and the data beginning with this name will have been aggregated together. The NDN can process mass data due to good convergence capacity, and can also solve part of burden brought by a naming center, namely the number of the contents in the whole network is far larger than that of the hosts, and the content addressing-oriented scale is larger than that of the hosts. But hierarchical naming is generally less secure.

The basic node structure of the NDN network router comprises two tables and a content cache pool: a PIT Table (Pending Interest Table), a FIB Table (Forwarding Information Base), and a content cache pool CS (content store), the basic communication flow of which is shown in FIG. 3.

The structures of the Interest packet and the Data packet are shown in fig. 4. The Name in both the Interest package and the Data package refers to the Name of the content block to be requested. A user puts the name of a content block to be requested into an Interest packet, and the packaged Interest packet is sent to an NDN network; the NDN node router forwards the Interest packet to a node containing the content according to the Name in the Interest packet; once the Interest packet reaches a node containing the requested content, the node returns a Data packet containing the requested content and signature information thereof; and returning the Data packet along a path opposite to the Interest packet until the Data packet reaches a content requesting end, and obtaining the content which the user wants to request.

When an Interest packet arrives, the NDN Router firstly checks whether a content block requested in the Interest packet is cached in a CS cache, and if so, the Router generates a Data packet containing the content block and forwards the Data packet from an entrance port of the Interest packet; if not, searching whether the same content block request exists in the PIT, if so, adding the entry port number of the Interest packet to the entry port number item of the corresponding entry; if not, adding a new entry in the PIT, recording the name of the content block and the number of the ingress port of the Interest packet, and forwarding the Interest packet or discarding and returning NACK according to the FIB table and a specific forwarding strategy. Specifically, for a plurality of Interest packets requesting the same content block, the PIT table establishes only one entry to record the content block and the ingress port number of the Interest packets, and only forwards the first arrived Interest packet requesting the content block.

When a Data packet arrives, the NDN Router firstly searches a PIT entry corresponding to a content block in the Data packet in a PIT table, and if the PIT entry is not found, the Data packet is directly discarded; if the Data packet is found, the Data packet is forwarded out from all the Interest packet ingress ports recorded in the PIT entry, and the PIT entry is deleted at the same time, and the content in the Data packet is cached in the CS.

Each NDN node performs the processing process on the Interest packet and the Data packet, and the content acquisition requirement of the content requester is met. If different caching strategies and forwarding strategies are implemented in the NDN node, different optimization effects of the network can be achieved.

The ICN, by virtue of its name-based routing, enables separation of content and location, greatly facilitating the transfer and forwarding of information. ICN thus provides a platform for efficient content distribution, with core advantages over traditional IP networks:

(1) naming contents: content is named directly, and content and position information are decoupled, so that content-based routing is realized. On the other hand, because the address space of the content naming is unlimited, the problem of exhaustion of the IP address when the number of the terminals is huge under the IoT environment can be effectively solved.

(2) Caching in a network: because the content brought by the content naming is decoupled with the specific geographic position, the in-network cache content copy becomes feasible, the time benefit is exchanged by using the in-network cache space resource, the content response time is reduced, and the bandwidth is saved.

(3) Mobility support: the ICN network is a request/response model supporting content, and does not need to establish connection and maintain connection, thereby bringing about the advantage of being more suitable for mobility. When a request packet passes through a router in an ICN network, the router automatically records the track of the request packet, and the data packet is returned to a user according to the track. When the client moves, a new track is generated again, so that the position information of the client does not need to be maintained in the network, the mobility of the host is supported, and the problem of efficient transmission of mass information is solved. Compared with the problem of difficulty in solving the mobility of the IP communication connected end to end, the connectionless communication of the ICN provides a good basis for seamless switching of the mobility, and meanwhile, the intra-network cache is beneficial to reducing the content response delay.

(4) Network layer security: the information-centric network takes security into account at the beginning of design, and makes the security mechanism of the ICN more robust than that of the IP by directly performing security protection on the content itself. In conventional IP networks, security depends on whether the host is trusted, and if the host is not trusted, the information stored on the host is considered untrusted. However, the security of the information is not necessarily tied to the host storing the information. The ICN directly implements security measures on information from the information, so that the granularity of the security policy can be coarse or fine.

Therefore, the information center network adopts an information naming mode to replace the traditional address-centered network communication model, so that some inherent problems in the IP network can be solved, and the requirement of a user on massive information access is met.

The identification analysis is a key technology for realizing unique identification, positioning, addressing and routing of the user and the equipment. With the vigorous development of the industrial internet, the standardized coding of various resources by adopting public identification becomes the basis of information sharing and promotion of industrial intelligence. Several mainstream public coding modes can be generalized into a unified logical model, including a prefix field, a suffix field, and an optional security field.

The current DNS-based identifier resolution system architecture is shown in fig. 5, where an identifier resolution server can query a network location or related information stored in a target object according to an identifier code, and perform unique positioning and information query on a machine and an article; the information data storage server is a server for storing machine and article information.

Example 1

The industrial Internet identification analysis system based on the ICN realizes the decoupling of the content and the specific network node through content naming and in-network caching. Specifically, the NDN network implements content name based routing forwarding using a content name based routing algorithm without requiring a DNS server to query the location of a server. The characteristics of the NDN network provide an effective solution for the convergence of the industrial internet identification resolution and the network routing, and the system architecture is shown in fig. 6.

The identification name-content name conversion module is responsible for converting an identification name to be inquired into a naming format of the NDN, namely the NDN identification name is obtained, so that the identification inquiry request is forwarded in the NDN. The NDN router is responsible for forwarding Interest packets (Interest packets) and Data packets (Data packets), and stores the passing Data packets into a local cache. The information data storage server is a storage server of the NDN identification name and the corresponding information.

The identification query request first needs to construct an interest packet conforming to the naming format of the NDN network 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 the information storage server, the information data corresponding to the NDN identification name is returned to the identification query request node in a data packet mode along the direction opposite to the interest packet, and information query response of machines/products and the like is completed.

(1) Identification name-content name conversion module

In order to integrate the identifier resolution with the NDN network, it is imperative to implement the unified integration of the NDN naming and the identifier name.

Because the naming mode of the NDN is a hierarchical naming mode, the existing identification coding mode at present comprises different parts; in addition, the naming of the NDN and the identification coding are both names with different lengths, so that the NDN naming is very suitable for being compatible with various identification coding modes.

Specifically, because each part of the hierarchical naming of the NDN is separated by a "/" and separators of different id encoding modes are different, the id-content name conversion module has a main function of unifying various different id encoding separators into "/" separators. In addition, the NDN identification name also takes a specific identification code name as a prefix so as to avoid code naming conflicts of different identification code systems, enhance the aggregativeness of the NDN identification name and improve the query efficiency. It should be noted that the identification name-content name conversion module is executed before the request packet is accessed to the NDN network, for example, the terminal device.

The EPC, Ucode, OID are taken as examples below:

1)EPC

the coding structure of an EPC is as follows:

TABLE 1

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

2)Ucode

The identification structure of the Ucode is 'encoding type identification + encoding content (with variable length) + unique identification of the article'.

Conversion to NDN identification name: the encoding type identification/the encoding content/the unique item identification.

3)OID

The OID representation method comprises three forms of an OID numerical value, an OID alphanumeric value and an OID international resource identifier (OID-IRI). When represented in digital form, the different levels are separated by ". times", e.g., {2.17.2.3 }.

Conversion to NDN identification name: and/OID/2/17/2/3.

An alphanumeric representation, such as { joint-iso-itu-t (2) registration-procedures (17) document-types (2) binary (3) }.

Conversion to NDN identification name: [ the term "/OLD/join-iso-itu-t (2)/registration-processes (17)/document-types (2)/binary (3) ].

An internationalized form representation, such as "/Joint-ISO-ITU-T/Registration-Procedures/documentTypes/Binary".

Conversion to NDN identification name: [ OID ]/Joint-ISO-ITU-T/Registration-Procedures/DocumentTypes/Binary.

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

1) Information storage server

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

Each record in the information storage server comprises an identification name, an NDN identification name and information content, and the format of the record is as follows:

TABLE 2

Identification name

NDN identification name

Information content

The registration process of the identification name in the information storage server comprises the following steps:

a. when a new identification name and its corresponding information content are to be registered and stored in the information storage server, the identification name to be registered is first searched for among the identification names of all the entries of the information storage server. If the identification name exists, the identification name already exists in the information storage server, and the information content updating operation is executed.

b. If the NDN identification name does not exist, an entry is newly added in the information storage server, the identification name and the information content are recorded, and the NDN identification name corresponding to the identification name is obtained according to the conversion rule in the identification name-content name conversion module in the step (1). Because the same identification name conversion rule is adopted, the NDN identification name stored in the server is consistent with the NDN identification name obtained by conversion in the process of identifying the query request.

When the identification query interest packet reaches the information storage server, the information storage server performs a lookup operation. The searching process of the identification name in the information storage server comprises the following steps:

a. when an NDN tag interest packet arrives at the information storage server, the information storage server searches for the NDN tag of the request interest packet among the NDN tags of all the entries in the local area. And if so, returning the corresponding information content to the information inquiry node in the form of a data packet (the data packet is still named as the NDN identification name of the corresponding interest packet).

b. If not, the interest packet is discarded.

2) In-network caching

And the in-network cache stores the data packet passing through the local in the local cache according to the cache strategy. When the same NDN identification name request follows, the local cache can directly respond to the request, so that the network efficiency is improved, and the network resources are saved. Each record in the local cache contains an NDN identification name and information content, and the format of the record is as follows:

TABLE 3

NDN identification name

Information content

When an identification query interest packet reaches the NDN router, the NDN router firstly executes a search operation in a local cache, and the specific process is as follows:

a. when an IDENTIFY REQUIRY packet arrives at the NDN router, the NDN router searches the NDN IDs of all entries in the local cache for the NDN ID of the requesting interest packet. And if so, returning the corresponding information content to the information inquiry node in the form of a data packet (the data packet is still named as the NDN identification name of the corresponding interest packet).

b. If not, the subsequent operation of the NDN router is continued.

When one identification query result data packet reaches the NDN router, the NDN router executes cache operation in a local cache according to a cache strategy, and the specific process is as follows:

a. when an identification query result data packet arrives at the NDN router, the NDN router searches the NDN identification names of the data packet in the NDN identification names of all the entries in the local cache. If the identification name exists, the identification name already exists in the local cache, and caching is not carried out.

b. And if the NDN identifier does not exist, storing the NDN identifier and the information content of the data packet in a local cache according to a cache replacement strategy.

Example 2

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

A. information data storage server registration and broadcast

a. The product 1 is given an identification while registration is required in the information data storage server, and the specific registration process is as described in (a) and (2). The registration result is:

TABLE 4

{2.17.2.3}

/OID/2/17/2/3

Product 1 information

b. And the information data storage server broadcasts the locally stored NDN identification name, so that the NDN network can carry out routing forwarding according to the NDN identification name.

B. Terminal 1 requesting identity query

a. The terminal 1 acquires the identification name ({2.17.2.3}) of the product 1, converts the identification name ({2.17.2.3}) into an NDN identification name (/ OID/2/17/2/3) through a local identification name-content name conversion module, constructs a corresponding interest packet, and sends the interest packet to the NDN.

b. When the NDN router receives the interest packet, the NDN router processes and forwards the interest packet according to a standard NDN node processing model, namely, the NDN router firstly searches in a local cache (the specific searching process is as described in (I) and (2)), if the NDN router finds the interest packet, the data packet is returned immediately, and otherwise, the interest packet is forwarded out by relying on PIT and FIB.

c. This interest package arrives at the information data storage server via R1, R2. And (3) the information data storage server performs searching according to the NDN identification name (the specific searching process is as described in the step (I) and the step (2)). If not, discarding the interest packet; if found, a packet (/ OID/2/17/2/3) is returned.

d. When the NDN router receives the data packet, the NDN router returns the data packet along the route to the terminal 1 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 described in (a) and (2)). The entries in the local cache are:

TABLE 5

/OID/2/17/2/3

Product 1 information

C. Terminal 2 requests identity query

a. The terminal 2 also wants to query the information of the product, and constructs an interest packet and sends the interest packet to the NDN network by acquiring the identification name of the product 1 and converting the identification name into the NDN identification name.

b. When this interest packet arrives at R1 via R3, the data packet (/ OID/2/17/2/3) may be returned directly, since this product information is already stored in the local cache of R1.

c. The packet is returned from R1 to terminal 2 through R3, completing the identification inquiry request response.

D. Supporting heterogeneous compatibility

a. When the product 1 has an identification name of another identification standard, the 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 acquire the product information under the identifier, the identifier is converted into the NDN identifier through the identifier-content name conversion module (the format and the conversion rule of the identifier standard are installed), so that the product information under the identifier is acquired in the NDN network.

The foregoing is only a preferred embodiment of this invention and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the invention and these modifications should also be considered as the protection scope of the invention.

Claims

1. Industry internet identification analytic system based on ICN, its characterized in that: the identification analysis system comprises an ICN-based router, an information data storage server and an identification name-content name conversion module; wherein,

the ICN router is used for completing forwarding of Interest packets and Data packets and storing the passing Data packets into a local cache;

2. The ICN-based industrial internet identity resolution system of claim 1, wherein: the identification resolving system is based on an NDN network; the identification name-content name conversion module is used for converting an identification name to be inquired into a naming format of the NDN network, so that the NDN identification name is obtained, and the identification inquiry request is forwarded in the NDN network;

the NDN router is used for completing forwarding of Interest packets and Data packets, and storing the passing Data packets in a local cache;

3. The ICN-based industrial internet identity resolution system of claim 2, wherein: the identification name-content name conversion module executes an operation before the request packet accesses the NDN network, and unifies various different identification code separators in the industrial Internet identification resolution system into "/" separators; the NDN identification name takes a specific identification code name as a prefix.

4. An ICN based industrial internet identity resolution system according to any of claims 1 to 3, characterized in that: the various identification codes in the industrial internet identification analysis system comprise EPC, Ucode and OID codes.

5. The data access method of the ICN-based industrial internet identity resolution system according to claim 1, wherein: the data access method comprises the following steps:

step three, another terminal inquires the information of the same product, converts the identification name of the product into an NDN identification name by acquiring the identification name of the product, constructs an interest packet and sends the interest packet to the NDN network; and when the interest packet reaches the storage node in the step two, directly returning a data packet to finish the response of the identifier name inquiry request.

6. The data access method of claim 5, wherein: the second step is specifically as follows:

7. The data access method of claim 6, wherein: the registering and broadcasting of various different identification codes in the industrial internet identification analysis system in the information data storage server mentioned in the first step specifically comprises:

8. The data access method of claim 6, wherein: in step 2.2, the processing and forwarding of the interest packet by the NDN router according to the standard NDN node processing model specifically includes:

9. The data access method of claim 6, wherein: in the step 2.3, the searching by the information data storage server according to the NDN identification name specifically includes:

10. The data access method of claim 6, wherein: in the step 2.4, the specific process of caching the data packet according to the local caching policy includes: