CN110099135B - Data open service system and method based on ICN naming - Google Patents
Data open service system and method based on ICN naming Download PDFInfo
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- CN110099135B CN110099135B CN201810083692.9A CN201810083692A CN110099135B CN 110099135 B CN110099135 B CN 110099135B CN 201810083692 A CN201810083692 A CN 201810083692A CN 110099135 B CN110099135 B CN 110099135B
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Abstract
The invention relates to a data open service system based on ICN naming, which comprises: the gateway subsystem is used for acquiring and storing various kinds of original data of the content data source; registering the HRN name data as the HRN name data, and storing the HRN name data; the data packet forwarding subsystem is used for respectively forwarding and communicating data with the gateway subsystem, the global naming subsystem, the global analysis subsystem and the user interaction subsystem; the global naming subsystem is used for naming the HRN name data as EID name data comprising prefixes, middles and suffixes by adopting a hash function of sha-1 and carrying out security authentication; the global analysis subsystem is used for registering the mapping relation between the EID name data and the NA; analyzing the input HRN name data, retrieving and inquiring; and the user interaction subsystem is used for acquiring the original data corresponding to the network address NA and providing a RESTful user interface to transmit the original data to a user or a high-level application so as to realize the open service of the original data in the content data source.
Description
Technical Field
The invention belongs to the technical field of internet, internet of things and smart home, and particularly relates to a data open service system and method based on ICN naming.
Background
With the rapid development of modern technologies such as the internet, the internet of things, smart home and the like, networks are constantly changing, and the existing networks are difficult to meet the development requirements of information networks which mainly contain contents such as large flow and videos. The internet architecture in use today was designed in the last 60-70 s, the first internet was designed for connecting resources in different geographical locations, and a TCP/IP protocol stack with a thin waist structure was used as a middle part to connect upper and lower layers, and communication was performed by establishing a communication link between hosts. This architecture is very suitable for the original HTTP, FTP and other communication based on the host, and the internet is also developed on the basis of this architecture. However, with the development of modern internet, such architecture gradually shows various drawbacks, for example, poor mobile support for hosts. Recent data indicates that the internet is changing from inter-host communication to content-oriented communication.
In order to meet new demands brought by the development of the internet, the internet is greatly increased on the original basis. The method of increasing the number of the internet rather than starting from the beginning continuously expands the functions of the internet and adapts to various new requirements. The benefits of this add-on middleware or patch approach: the new functions and requirements can be realized without changing the original deployed network too much; however, there is also a significant disadvantage: the underlying high performance from zero deployment cannot be achieved.
In order to cope with the demand of the existing network for contents, an Information Center Network (ICN) has been developed. The primary goal of an information centric networking ICN is to convert the existing host-oriented communication mode into a content-centric communication mode. Among other things, content-centric communication modes require a nomenclature that is independent of geographic location, network address, and so as to implement a host-based mode that departs from the current TCP/IP requirements in order to efficiently distribute content over a network.
With the continuous development of wireless communication technology, in the future 5G network, the transmission of contents such as video and the like further becomes the main requirement of the network, and a solution which can realize low delay and can well support mobility is urgently needed. Typical scenes of a 5G network include continuous wide area coverage, low power consumption and large connection, high capacity of hot spots, low delay and high reliability, and the requirements of end-to-end delay and mobility are also very important in the technical indexes of the 5G network. In the aspect of low delay and high reliability, the 5G scene index provides that the air interface delay needs to be reduced to less than 1ms, and the end-to-end delay needs to be reduced to the ms magnitude, which requires that the naming resolution and the routing time are controlled within a lower magnitude.
The Information center Network ICN is a very well-known Network in many future networks, and currently, there are many related researches on the Information center Network ICN, such as combining Broadcast and content-Based Network (CBCB), Data Oriented Network Architecture (DONA), Named Data Networking (NDN), Information Network (Network of Information, NetInf), Publish and subscribe internet Technology (pursubscriber internet Technology, pursit) and the like. The CBCB realizes pushing and pulling of the interest packages through a broadcasting layer, so that the release and the acquisition of the content are realized; the DONA realizes the security requirement of the Internet through a special P: L naming mode, and realizes naming and route analysis through a special RH system; NDN is in a special layered structure, so that good polymerization is realized; NetInf can realize naming and routing of contents through a REX system and a DHT network; the PURSUIT proposes a special naming mode of SID and RID and a mode of publishing and subscribing. The ICN can well meet the future requirements of the 5G network, has the characteristics of simplified mobile architecture, seamless multi-host support, high-efficiency in-network cache and the like, is highly matched with the requirements of the 5G network, and can realize the continuity, high speed and low time delay of the mobile service of the 5G network.
The RESTful architecture is a popular internet software architecture at present, and has the advantages of clear structure, standard conformity, easy understanding, convenient expansion and the like; therefore, it has been widely used. REST (Representational state transfer, REST for short) first appeared in the Roy field paper in 2000, indicating that: for a long time, software research mainly focuses on classification of software design and evolution of design methods, and rarely objectively evaluates the influence of different design choices on system behaviors. On the contrary, network research mainly focuses on details of communication behaviors between systems and how to improve the performance of a specific communication mechanism, and often ignores the fact that changing the interaction style of an application has a greater influence on the overall performance than changing the interaction protocol. The writing purpose of this article is to understand and evaluate the architecture design of network-based application software to obtain a powerful, high-performance architecture suitable for communication, while conforming to the architecture principle. "in the mainstream service interaction scheme at present, REST is simpler and clearer than SOAP and XML-RPC, and is widely popular.
Although the above ICN researches on the information center network, such as CBCB, DONA, NDN, NetInf, and purrotate, have their advantages, there still is no data open service system and method based on ICN naming, and particularly there is no 5G-oriented ICN data open naming specific implementation method and naming and content parsing transmission specific data open service system compatible with the existing IP network. Meanwhile, the 5G network is based on the existing IP network infrastructure, and it is expensive for operators to establish a huge pure ICN, so that a data open service method and a complete system implementation that are compatible with the existing IP network and implement ICN naming by adding an intermediate layer facing 5G are urgently needed.
Disclosure of Invention
The invention aims to solve the defects in the prior art, provides a data open service system based on ICN naming, overcomes the natural disadvantage of the existing flat naming in the aggregation aspect, overcomes the requirements that a hierarchical naming scheme cannot ensure the safety self-authentication characteristic, global uniqueness, persistent naming, position independence and the like of naming, and realizes data open service through ICN naming so as to solve the data sharing problem among vertical applications.
In order to achieve the above object, the present invention provides an ICN naming-based data open service system, which is an ICN-based naming method combining a hierarchical Human Readable Name (HRN), a local fixed-length name (LID), and a globally unique entity name (EID) including a prefix, a middle, and a suffix; and a RESTful framework is adopted, and a user interface of a user or an upper application is provided to transmit the original data to the user or the upper application so as to realize the open service of the original data in the content data source. Wherein, this data open service system includes:
the gateway subsystem is used for acquiring and storing the original data of the content data source; registering the original data as HRN name data, and storing the HRN name data in a content and name binding database; performing intra-domain name exchange on the HRN name data, and sending the HRN name data to a global naming subsystem through a data packet forwarding subsystem; the system is also used for sending the mapping relation between the EID name data and the network address NA to the global analysis subsystem; the system is also used for sending the original data corresponding to the network address NA to the user interaction subsystem;
the data packet forwarding subsystem is used for respectively forwarding and communicating data with the gateway subsystem, the global naming subsystem, the global analysis subsystem and the user interaction subsystem; the method can be directly built on the existing IP network, thereby being completely compatible with the existing network and the 5G network;
the global naming subsystem is used for receiving the HRN name data, naming the HRN name data as EID name data containing prefixes, middles and suffixes by adopting a hash function of sha-1, and carrying out safety authentication to realize ICN naming;
the global analysis subsystem is used for registering and storing the mapping relation between the EID name data and the network address NA for inquiry; the system is also used for analyzing EID name data corresponding to HRN name data input by a user or an upper layer application, retrieving and inquiring a corresponding network address NA;
the user interaction subsystem is used for interacting with a user or an upper application; the system is used for acquiring EID name data corresponding to the input HRN name data and a network address NA corresponding to the EID name data; and the gateway subsystem is also used for acquiring the original data corresponding to the network address NA sent by the gateway subsystem and providing a RESTful user interface to transmit the original data to a user or a high-level application so as to realize the open service of the original data in the content data source.
In the above technical solution, the gateway subsystem further includes:
the data acquisition module is used for acquiring various original data of the content data source and sending the original data to the content storage module;
the content storage module is used for receiving the various types of original data and selecting a storage mode of direct storage or storage after preprocessing according to different purposes;
the content registration module is used for registering the various types of original data as HRN name data; wherein the HRN name data is original data with an HRN name;
the content and name binding database is used for storing the HRN name data, the mapping relation between the EID name data and the network address NA sent by the global naming subsystem and the original data corresponding to the network address NA;
the content sending module is used for sending the HRN name data to the first ICN communication module; the ICN communication module is also used for sending the original data corresponding to the latest network address NA to the first ICN communication module;
the intra-domain name conversion module is used for converting a globally unique entity name (abbreviated EID, generally 160 bits) and a local fixed-length name (abbreviated LID, generally 16 bits). Preferably, the intra-domain name conversion can be realized by extracting a part of the globally unique entity name EID as a local fixed-length name LID;
and the first ICN network communication module is used for forwarding and communicating the HRN name data and the original data corresponding to the latest network address NA with the data packet forwarding subsystem. Sending, receiving and processing ICN packet data according to a defined data packet format; wherein the ICN packet data further comprises: an ICN header and an ICN load. The ICN payload portion of the ICN packet data includes the raw data, i.e., the raw data is encapsulated into the ICN payload of the ICN packet data.
In the above technical solution, the global naming sub-system further includes:
the content naming module is used for receiving the HRN name data after receiving a naming request of the HRN name data, and naming the HRN name data as EID name data containing prefixes, middles and suffixes by adopting a hash function of sha-1 and a flattened fixed length of LID; the EID name data and the HRN name data correspond to each other one by one;
the content authentication module is used for carrying out security authentication on the EID name data; specifically, whether the authentication request is a legal request is judged according to the public key information and the private key information; if the public key and the private key of the authentication request are matched, the authentication request is judged to be a legal request, the security authentication is successful, and the EID name data is sent to the gateway subsystem through the data packet forwarding subsystem; if the public key and the private key of the authentication request are not matched, judging the request as an illegal request, returning an illegal error and returning a security authentication failure;
and the second ICN network communication module is used for forwarding and communicating the EID name data with the data packet forwarding subsystem. Sending, receiving and processing ICN packet data according to a defined data packet format; wherein the ICN packet data further comprises: an ICN header and an ICN load. The ICN payload portion of the ICN packet data includes the raw data, i.e., the raw data is encapsulated into the ICN payload of the ICN packet data.
The content naming module specifically comprises: firstly, HRN name data are converted into EID name data through a hash function and the flattened fixed length of an LID; then, adding a fixed-length aggregation class name for aggregation to the prefix of the EID name data; setting a fixed length of a hash containing the HRN in the middle of the EID name data; and adding version and fragment information to a suffix of the EID name data, thereby comprehensively utilizing the advantages of flat naming and hierarchical naming. Specifically, the HRN name data is converted into the EID name data by adopting a hash function of sha-1, and as the HRN name data is indefinite-length and human-readable, the EID name data is only 160 bits with a fixed length; adding prefixes and suffixes before and after HRN name data, and converting the prefixes and the suffixes into EID name data; the prefix is a video prefix and represents a first type of content resource; the HRN name data of the hash of the HRN is arranged in the middle, and the suffix is the version number and the fragment information.
In the above technical solution, the global parsing subsystem further includes:
the third ICN network communication module is configured to perform, with the packet forwarding subsystem, forwarding and communication of the mapping relationship between the EID name data and the network address NA, the EID name data corresponding to the input HRN name data, and the network address NA corresponding to the EID name data; sending, receiving and processing ICN packet data according to a defined data packet format; wherein the ICN packet data further comprises: an ICN header and an ICN load. The ICN load part in the ICN packet data comprises original data, namely the original data is packaged into the ICN load of the ICN packet data;
the request processing module is used for registering the mapping relation between the EID name data and the network address NA; the system is also used for analyzing EID name data corresponding to HRN name data input by a user or an upper layer application, retrieving and inquiring a corresponding network address NA;
and the global analysis database is used for storing the mapping relation between the EID name data and the network address NA, the EID name data and the network address NA thereof for query operation.
The global resolution database further comprises: when the existing EID name data is stored, the network address NA corresponding to the existing EID name data is covered, and the latest network address NA is obtained, so that the mobility requirement brought by the change of the network attachment point is met.
The request processing module further comprises: when the processed parsing and query requests are not legal, an error message is returned.
In the above technical solution, the user interaction subsystem further includes:
the user interface module is used for providing any HRN name data required to be input; the system is also used for acquiring the original data corresponding to the network address NA and transmitting the original data corresponding to the network address NA to a user or an upper application according to a RESTful framework so as to realize the open service of the original data in the content data source;
the name conversion agent module is used for acquiring the HRN name data required to be input, sending the HRN name data required to be input to the global naming subsystem, inquiring and acquiring the corresponding EID name data, sending the EID name data to the global analysis subsystem, analyzing the EID name data, and inquiring and acquiring the corresponding network address NA; the system is also used for sending a network address NA to the gateway subsystem and inquiring corresponding original data of the network address NA;
the content storage module is used for receiving the network address NA, completely packaging the network address NA and storing the network address NA;
and the fourth ICN communication module is configured to forward and communicate, with the packet forwarding subsystem, EID name data corresponding to the HRN name data that needs to be input, a network address NA corresponding to the EID name data, and original data corresponding to the network address NA. Sending, receiving and processing ICN packet data according to a defined data packet format; wherein the ICN packet data further comprises: an ICN header and an ICN load. The ICN payload portion of the ICN packet data includes the raw data, i.e., the raw data is encapsulated into the ICN payload of the ICN packet data.
In the above technical solution, the packet forwarding subsystem is configured to perform data forwarding and communication with the gateway subsystem, the global naming subsystem, the global parsing subsystem, and the user interaction subsystem, respectively; thereby realizing compatibility with future IP networks as 5G infrastructure. Specifically, the program is a programmable network device including a POF deployed in a network, and the program is run on the programmable network device and is used for analyzing various ICN packet data and performing routing and forwarding operations.
The ICN packet data is in a signaling and data packet packaging format of the system, and can be realized in the existing IP network, so that a compatible 5G network is realized. The ICN packet data refers to an ICN packet header used as signaling and an encapsulated ICN payload.
The invention also provides a data open service method based on ICN naming, which comprises the following steps: content registration and release, content network address NA change detection and re-registration and content acquisition.
In the above technical solution, the registering and publishing of the content specifically includes:
step 101) a data acquisition module of a gateway subsystem acquires various kinds of latest original data of an original data source, and registers and stores the various kinds of latest original data as HRN name data;
step 102) the gateway subsystem sends HRN name data and a name request thereof to the global naming subsystem through the data packet forwarding subsystem;
step 103) after the global naming subsystem receives the naming request of the step 102), HRN name data are received and named as EID name data, security authentication is carried out, and after the security authentication is passed, the EID name data are returned to the gateway subsystem through the data packet forwarding subsystem;
step 104) the gateway subsystem receives the EID name data in the step 103), and sends the EID name data and the corresponding network address NA to the global analysis subsystem through the first ICN network communication module and the data packet forwarding subsystem;
step 105) the global analysis subsystem receives the EID name data and the network address NA corresponding to the EID name data, and stores the mapping relation between the EID name data and the network address NA corresponding to the EID name data as well as the EID name data and the network address NA corresponding to the EID name data into a global analysis database; then, returning a first success message to a gateway subsystem through a data packet forwarding subsystem, wherein the gateway subsystem stores the EID name data; the first successful message is a mapping relation between the EID name data and the corresponding network address NA.
In the above technical solution, the detecting and re-registering of the change of the content network address NA specifically includes:
the gateway subsystem continuously detects whether the network address NA changes, if the network address NA changes, all EID name data are retrieved, and then an updating request of the mapping relation between all EID name data and the network address NA is sent to the global analysis subsystem through the first ICN communication module and the data packet forwarding subsystem; then the global analysis subsystem receives the updating request, updates the EID name data according to the new network address NA, stores the mapping relation between the new EID name data and the new network address NA to the global analysis database so as to update the global analysis database, and sends a second success message to the gateway subsystem through the third ICN communication module and the data packet forwarding subsystem; the second success message specifically refers to a mapping relationship between the updated EID name data and the new network address NA.
In the above technical solution, the content acquisition specifically includes:
step 301) inputting any HRN name data by a user or an upper-layer application, and sending the HRN name data to a user interaction subsystem;
step 302) the user interaction subsystem acquires the HRN name data and sends the HRN name data and the naming query request thereof to the global naming subsystem through the data packet forwarding subsystem;
step 303) after receiving the naming inquiry request, the global naming subsystem retrieves and inquires the EID name data corresponding to the HRN name data, and returns the EID name data to the user interaction subsystem through the second ICN network communication module and the data packet forwarding subsystem;
step 304) the user interaction subsystem receives the EID name data, and sends the EID name data and the analysis request thereof to the global analysis subsystem through the fourth ICN network communication module and the data packet forwarding subsystem;
step 305), after receiving the analysis request, the global analysis subsystem retrieves and queries a global analysis database to obtain a network address NA corresponding to the EID name data, and returns the network address NA corresponding to the EID name data to the user interaction subsystem through a third ICN network communication module and a data packet forwarding subsystem;
step 306) the user interaction subsystem sends the network address NA corresponding to the EID name data to the gateway subsystem through the data packet forwarding subsystem;
and 307) the gateway subsystem receives the network address NA corresponding to the EID name data, acquires original data corresponding to the network address NA, sends the original data corresponding to the network address NA to the user interaction subsystem through the first ICN network communication module and the data packet forwarding subsystem, and transmits the original data corresponding to the network address NA to a user or an upper application according to a RESTful framework to realize open service of the original data in a content data source.
The invention has the advantages that:
the invention realizes the open service of the original data in the content data source by combining RESTful, has the characteristics of clear structure, conformity with the standard, easy understanding and convenient expansion, and solves the data sharing problem among vertical applications; by adding the intermediate layer, the method and the system for realizing the whole set of ICN named data open service from name resolution to content transmission in the 5G network environment based on the IP network are realized, and have implementability and universality. The invention realizes the characteristics of safe self-authentication, persistent naming, position independence, aggregation capability and the like of names by providing a 5G-oriented ICN content naming mode; the fusion of the future 5G and the ICN is realized by a method for transmitting ICN data packets on the IP, and the local transmission overhead is reduced by flattening fixed length of a local fixed-length name LID.
Drawings
FIG. 1 is an architecture diagram of an ICN naming-based data open service system according to the present invention;
FIG. 2 is a schematic diagram of an ICN packet header format of an ICN naming-based data open service system according to the present invention;
FIG. 3 is a schematic diagram of several different ICN packet formats of an ICN naming-based data open service system according to the present invention;
FIG. 4 is a flow chart of content registration and publishing in an ICN naming-based data open service method according to the present invention;
FIG. 5 is a flow chart of the change detection and re-registration of the content network address NA of the data open service method based on ICN naming according to the present invention;
fig. 6 is a flow chart of content acquisition of a data open service method based on ICN naming according to the present invention.
Detailed Description
The ICN naming-based data open service system and the ICN naming-based data open service method have wide application, such as naming audio and video content and transmitting audio and video content data in a video or audio live broadcast and on-demand system under a 5G IP network environment, naming sensor data in the field of Internet of things and transmitting original data of a sensor to a far end, wherein a remote user interface adopts a RESTful framework, and the ICN naming-based data open service system and the ICN naming-based data open service method have the advantages of being clear in structure, meeting standards, easy to understand, convenient to expand and the like. In the following embodiments, the configuration, function, workflow, etc. of the present system are described in detail by taking as an example a video content naming and content transmission system using ICN under an existing IP network. When the system is used in other occasions, the composition, the function and the workflow of the system are not essentially different, and only the content published and acquired in the system is modified correspondingly.
The invention provides a data open service system based on ICN naming, which is a naming mode based on ICN combined with a layered Human Readable Name (HRN), a local fixed long-short name (LID) and a global unique entity name (EID) containing a prefix, a middle and a suffix; and a RESTful framework is adopted, and a user interface is provided to transmit the original data to a user or a high-level application so as to realize the open service of the original data in the content data source. As shown in fig. 1, the data open service system includes:
the gateway subsystem is used for acquiring and storing the original data of the content data source; registering the original data as HRN name data, and storing the HRN name data in a content and name binding database; performing intra-domain name exchange on the HRN name data, and sending the HRN name data to a global naming subsystem through a data packet forwarding subsystem; the system is also used for sending the mapping relation between the EID name data and the network address NA to the global analysis subsystem; the system is also used for sending the original data corresponding to the network address NA to the user interaction subsystem;
the data packet forwarding subsystem is used for respectively forwarding and communicating data with the gateway subsystem, the global naming subsystem, the global analysis subsystem and the user interaction subsystem; the method can be directly built on the existing IP network, thereby being completely compatible with the existing network and the 5G network;
the global naming subsystem is used for receiving the HRN name data, naming the HRN name data as EID name data containing prefixes, middles and suffixes by adopting a hash function of sha-1, and carrying out safety authentication to realize ICN naming;
the global analysis subsystem is used for registering and storing the mapping relation between the EID name data and the network address NA for inquiry; the system is also used for analyzing EID name data corresponding to HRN name data input by a user or an upper layer application, retrieving and inquiring a corresponding network address NA;
the user interaction subsystem is used for interacting with a user or an upper application; the system is used for acquiring EID name data corresponding to the input HRN name data and a network address NA corresponding to the EID name data; and the gateway subsystem is also used for acquiring the original data corresponding to the network address NA sent by the gateway subsystem and providing a RESTful user interface to transmit the original data to a user or a high-level application so as to realize the open service of the original data in the content data source.
In the above technical solution, the gateway subsystem further includes:
the data acquisition module is used for acquiring various original data of the content data source and sending the original data to the content storage module;
the content storage module is used for receiving the various types of original data and selecting a storage mode of direct storage or storage after preprocessing according to different purposes;
the content registration module is used for registering the various types of original data as HRN name data; wherein the HRN name data is original data with an HRN name;
the content and name binding database is used for storing the HRN name data, the mapping relation between the EID name data and the network address NA sent by the global naming subsystem and the original data corresponding to the network address NA;
the content sending module is used for sending the HRN name data to the first ICN communication module; the first ICN communication module is also used for sending the original data corresponding to the network address NA to the first ICN communication module;
the intra-domain name conversion module is used for converting a globally unique entity name (abbreviated EID, generally 160 bits) and a local fixed-length name (abbreviated LID, generally 16 bits). Preferably, the intra-domain name conversion can be realized by extracting a part of the globally unique entity name EID as a local fixed-length name LID;
and the first ICN network communication module is used for forwarding and communicating the HRN name data and the original data corresponding to the network address NA with the data packet forwarding subsystem. Sending, receiving and processing ICN packet data according to a defined data packet format; wherein the ICN packet data further comprises: an ICN header and an ICN load. The ICN payload portion of the ICN packet data includes the raw data, i.e., the raw data is encapsulated into the ICN payload of the ICN packet data.
The gateway subsystem specifically comprises: the data acquisition module acquires various types of original data of a content data source, such as original video frames, original data streams of various sensors and the like, and does not have a storage function. Selecting a storage mode which can directly store various types of original data or preprocess and store various types of original data to a content storage module according to different purposes of various types of original data acquired by a data acquisition module; and the various types of original data are registered as HRN name data and stored. The mapping relation between the HRN name data, the EID name data and the network address NA and the original data corresponding to the network address NA can be obtained by users of other equipment or upper-layer applications by calling a content registration module and a content sending module to perform a series of operations such as naming, registering, inquiring and obtaining with the data packet forwarding subsystem, the global naming subsystem, the global analysis subsystem and the user interaction subsystem. The original data corresponding to the network address NA can be acquired by a remote processing program through the user interaction subsystem and directly provided to the user by the application layer program through the gateway subsystem. Meanwhile, the gateway subsystem also re-registers all HRN name data contents stored in the gateway subsystem when the network address NA changes due to the change of the position of the equipment, so that the 5G mobility requirement is realized.
Specifically, the gateway subsystem may be a computer or a single chip with a data processing function, such as a raspberry pi. HRN name data is sent to a global naming subsystem through a data packet forwarding subsystem, EID name data named by the global naming subsystem is retrieved and stored in a content and name binding database, a part of the EID name data is extracted to be used as a local fixed-length name (LID), and intra-domain name conversion can be realized by a method of extracting a part of a global unique entity name (EID, generally 160 bits) to be used as a local fixed-length name (LID, generally 16 bits). And then, sending a mapping relation between the EID name data and the network address NA to the global resolution subsystem and carrying out a registration request for registration.
In the above technical solution, the global naming sub-system further includes:
the content naming module is used for receiving the HRN name data after receiving a naming request of the HRN name data, and naming the HRN name data as EID name data containing prefixes, middles and suffixes by adopting a hash function of sha-1 and a flattened fixed length of LID; the EID name data and the HRN name data correspond to each other one by one;
the content authentication module is used for carrying out security authentication on the EID name data; specifically, whether the authentication request is a legal request is judged according to the public key information and the private key information; if the public key and the private key of the authentication request are matched, the authentication request is judged to be a legal request, the security authentication is successful, and the EID name data is sent to the gateway subsystem through the data packet forwarding subsystem; if the public key and the private key of the authentication request are not matched, judging the request as an illegal request, returning an illegal error and returning a security authentication failure;
and the second ICN network communication module is used for forwarding and communicating the EID name data with the data packet forwarding subsystem. Sending, receiving and processing ICN packet data according to a defined data packet format; wherein the ICN packet data further comprises: an ICN header and an ICN load. The ICN payload portion of the ICN packet data includes the raw data, i.e., the raw data is encapsulated into the ICN payload of the ICN packet data.
The content naming module specifically comprises: firstly, HRN name data are converted into EID name data through a hash function and the flattened fixed length of an LID; then, adding a fixed-length aggregation class name for aggregation to the prefix of the EID name data; setting a fixed length of a hash containing the HRN in the middle of the EID name data; and adding version and fragment information to a suffix of the EID name data, thereby comprehensively utilizing the advantages of flat naming and hierarchical naming. Specifically, the HRN name data is converted into the EID name data by adopting a hash function of sha-1, and as the HRN name data is indefinite-length and human-readable, the EID name data is only 160 bits with a fixed length; adding prefixes and suffixes before and after HRN name data, and converting the prefixes and the suffixes into EID name data; the prefix is a video prefix and represents a first type of content resource; the HRN name data of the hash of the HRN is arranged in the middle, and the suffix is the version number and the fragment information.
The specific naming process of the content naming module is as follows: human-readable names (HRNs) represent attributes of content, the HRN name data containing semantic information, the length of which is indefinite; hierarchical naming is employed to identify attributes of content, such as "the Chinese academy of acoustics/national network New media engineering research center/5G-ICN team/video conference", an easily aggregated hierarchical structure of the video conference from the Chinese academy of acoustics in this example. Local unique names (LIDs) are short names with flat fixed length, such as 16 bits, to reduce local transmission overhead, such as "1994", in which case LIDs are named locally and are determined according to the content storage location of EID name data, and can be recycled and stored in the domain name conversion module of the gateway subsystem when the content is excessive.
Naming the EID name data by using a flattened fixed-length long name (such as 160bit) of the LID; the LID and the EID name data are different in length, the LID has no prefix and suffix, the EID name data comprise a prefix and a suffix, the LID uses a short name, and the EID name data uses a long name. The EID name data includes: prefix, middle and suffix; wherein, the prefix is set as a fixed length 16bit, the middle part is from HRN part fixed length (such as 128bit), the suffix is from fragment and version information part fixed length 16 bit; for example, the EID name data is "00016876 c2c368b7e287ac 865232232799131530101"; wherein, the length of EID name data is 160 bits, wherein: the prefix 16bit is a prefix 0001 for aggregation and represents a first type of content resource; the middle 128bit is a flattened hash of the content, namely 6876c2c368b7e287ac86523279913153, has the characteristics of global uniqueness, safety self-authentication and independence of name and position, and can meet the requirement of 5G mobility; the suffix 16bit is 0101, representing version and fragment information, i.e., v1 version v1 fragment.
In the above technical solution, the global parsing subsystem further includes:
the third ICN network communication module is configured to perform, with the packet forwarding subsystem, forwarding and communication of the mapping relationship between the EID name data and the network address NA, the EID name data corresponding to the input HRN name data, and the network address NA corresponding to the EID name data; sending, receiving and processing ICN packet data according to a defined data packet format; wherein the ICN packet data further comprises: an ICN header and an ICN load. The ICN load part in the ICN packet data comprises original data, namely the original data is packaged into the ICN load of the ICN packet data;
the request processing module is used for registering the mapping relation between the EID name data and the network address NA; the system is also used for analyzing EID name data corresponding to HRN name data input by a user or an upper layer application, retrieving and inquiring a corresponding network address NA;
and the global analysis database is used for storing the mapping relation between the EID name data and the network address NA, the EID name data and the network address NA thereof for query operation.
The global resolution database further comprises: when the existing EID name data is stored, the network address NA corresponding to the existing EID name data is covered, and the latest network address NA is obtained, so that the mobility requirement brought by the change of the network attachment point is met.
The request processing module further comprises: when the processed parsing and query requests are not legal, an error message is returned.
In the above technical solution, the user interaction subsystem further includes:
the user interface module is used for providing any HRN name data required to be input; the system is also used for acquiring the original data corresponding to the network address NA and transmitting the original data corresponding to the network address NA to a user or an upper application according to a RESTful framework so as to realize the open service of the original data in the content data source;
the name conversion agent module is used for acquiring the HRN name data required to be input, sending the HRN name data required to be input to the global naming subsystem, inquiring and acquiring the corresponding EID name data, sending the EID name data to the global analysis subsystem, analyzing the EID name data, and inquiring and acquiring the corresponding network address NA; the system is also used for sending a network address NA to the gateway subsystem and inquiring corresponding original data of the network address NA;
the content storage module is used for receiving the network address NA, completely packaging the network address NA and storing the network address NA;
and the fourth ICN communication module is configured to forward and communicate, with the packet forwarding subsystem, EID name data corresponding to the HRN name data that needs to be input, a network address NA corresponding to the EID name data, and original data corresponding to the network address NA. Sending, receiving and processing ICN packet data according to a defined data packet format; wherein the ICN packet data further comprises: an ICN header and an ICN load. The ICN payload portion of the ICN packet data includes the raw data, i.e., the raw data is encapsulated into the ICN payload of the ICN packet data.
In the above technical solution, the packet forwarding subsystem is configured to perform data forwarding and communication with the gateway subsystem, the global naming subsystem, the global parsing subsystem, and the user interaction subsystem, respectively; thereby realizing compatibility with future IP networks as 5G infrastructure. Specifically, the program is a programmable network device including a POF deployed in a network, and the program is run on the programmable network device and is used for analyzing various ICN packet data and performing routing and forwarding operations.
The ICN data packet is in a signaling and data packet packaging format of the system, and can be realized in the existing IP network, so that a compatible 5G network is realized. The ICN packet data refers to an ICN packet header used as signaling and an encapsulated ICN payload.
Specifically, as shown in fig. 2, an ICN packet refers to 6 different types of ICN packet header formats, which include: parsing the registration packet, parsing the registration reply packet, parsing the request reply packet, data request reply packet. The head part of the ICN packet data is in a control information format of an ICN packet head, wherein a source EID is an EID of a sender, a target EID is an EID of a receiver, a source NA is an NA of the sender, and a target NA is an NA of the receiver; the 6 different types of ICN packets may be used to guarantee quality of service to improve user experience; the ICN header length is used for indicating the number of bytes of the ICN packet header and ICN header check; but also to check the integrity and correctness of the header portion of the ICN packet data. TLVs are other variable information that can be used for future expansion requirements; the ICN packet header of fig. 2 is encapsulated in an IP packet or a transport layer packet as a payload of the IP packet or the transport layer packet, thereby implementing transmission of the ICN packet data under the existing IP network, and thus being directly used in a 5G network environment.
As shown in fig. 3, the header 8bit of the ICN packet data is a packet type; according to different packet types, the following different types of ICN headers are designed: analyzing the registration packet, registering the response packet, analyzing the request response packet, the data request packet and the data request response packet; wherein the content of the first and second substances,
in the analysis registration packet, the IP header is 20Byte binary code; the TCP header is 20Byte binary coding, and can also be replaced by UDP coding of 8 Byte; the ICN header is 44Byte binary code; the type is 8bit binary code, and the binary code is used for registering the mapping relation between the EID and the NA; EID is 160bit binary code; NA is 32bit binary code; the timestamp is 32bit binary code; the mobile parameter is 8bit binary code, is used for mobility expansion, if register to the container of level 2 then fill in 2;
in the registration response packet, the IP header is 20Byte binary code; the TCP header is 20Byte binary coding, and can also be replaced by UDP coding of 8 Byte; the ICN header is 44Byte binary code; the type is 8bit binary code, and the binary code is used for registering the mapping relation between the EID and the NA; EID is 160bit binary code; ACK Flag: 01, registration is successful, 10, registration is failed;
in the analysis request packet, the IP header is 20Byte binary code; the TCP header is 20Byte binary coding, and can also be replaced by UDP coding of 8 Byte; the ICN header is 44Byte binary code; the type is 8bit binary code, and the binary code is used for registering the mapping relation between the EID and the NA; EID is 160bit binary code; the tracking mark, the peer tracking mark, the initial container mark and the tracking level are all used for subsequent mobility expansion and transmission level setting;
in the analysis request response packet, the IP header is 20Byte binary code; the TCP header is 20Byte binary coding, and can also be replaced by UDP coding of 8 Byte; the ICN header is 44Byte binary code; the type is 8bit binary code, and the binary code is used for registering the mapping relation between the EID and the NA; EID is 160bit binary code; the NA is a returned network address, and when the NA address is all 0, the analysis is failed; the timestamp is 32bit binary code;
in the data request packet, an IP header is 20Byte binary code; the TCP header is 20Byte binary coding, and can also be replaced by UDP coding of 8 Byte; the ICN header is 44Byte binary code; the type is 8bit binary code, and the binary code is used for registering the mapping relation between the EID and the NA; EID is 160bit binary code;
in the data request response packet, the IP header is 20Byte binary code; the TCP header is 20Byte binary coding, and can also be replaced by UDP coding of 8 Byte; the ICN header is 44Byte binary code; the type is 8bit binary code, is used for returning the data content requested; the data content is a variable length, ICN payload.
The invention also provides a data open service method based on ICN naming, which comprises the following steps: content registration and release, content network address NA change detection and re-registration and content acquisition.
As shown in fig. 4, in the foregoing technical solution, the registering and publishing of content specifically includes:
step 101) a data acquisition module of a gateway subsystem acquires various types of original data of an original data source, registers the various types of original data as HRN name data, and stores the HRN name data;
step 102) the gateway subsystem sends HRN name data and a name request thereof to the global naming subsystem through the data packet forwarding subsystem;
step 103) after the global naming subsystem receives the naming request of the step 102), HRN name data are received and named as EID name data, security authentication is carried out, and after the security authentication is passed, the EID name data are returned to the gateway subsystem through the data packet forwarding subsystem;
step 104) the gateway subsystem receives the EID name data in the step 103), and sends the mapping relation between the EID name data and the network address NA to the global analysis subsystem through the first ICN network communication module and the data packet forwarding subsystem;
step 105) the global analysis subsystem receives the mapping relation between the EID name data and the network address NA and stores the mapping relation to a global analysis database; then, the first success message is returned to the gateway subsystem through the data packet forwarding subsystem; and the first successful message is a mapping relation between the EID name data and the network address NA.
As shown in fig. 5, in the foregoing technical solution, the detecting of the change of the content network address NA and the re-registering specifically include:
the gateway subsystem continuously detects whether the network address NA changes, if the network address NA changes, all EID name data are retrieved, and then an updating request of the mapping relation between all EID name data and the network address NA is sent to the global analysis subsystem through the first ICN communication module and the data packet forwarding subsystem; then the global analysis subsystem receives the updating request, updates the EID name data according to the new network address NA, stores the mapping relation between the new EID name data and the new network address NA to the global analysis database so as to update the global analysis database, and sends a second success message to the gateway subsystem through the third ICN communication module and the data packet forwarding subsystem; the second success message specifically refers to a mapping relationship between the updated EID name data and the new network address NA.
As shown in fig. 6, in the foregoing technical solution, the content acquisition specifically includes:
step 301) inputting any HRN name data by a user or an upper-layer application, and sending the HRN name data to a user interaction subsystem;
step 302) the user interaction subsystem acquires the HRN name data and sends the HRN name data and the naming query request thereof to the global naming subsystem through the data packet forwarding subsystem;
step 303) after receiving the naming inquiry request, the global naming subsystem retrieves and inquires the EID name data corresponding to the HRN name data, and returns the EID name data to the user interaction subsystem through the second ICN network communication module and the data packet forwarding subsystem;
step 304) the user interaction subsystem receives the EID name data, and sends the EID name data and the analysis request thereof to the global analysis subsystem through the fourth ICN network communication module and the data packet forwarding subsystem;
step 305), after receiving the analysis request, the global analysis subsystem retrieves and queries a global analysis database to obtain a network address NA corresponding to the EID name data, and returns the network address NA corresponding to the EID name data to the user interaction subsystem through a third ICN network communication module and a data packet forwarding subsystem;
step 306) the user interaction subsystem sends the network address NA corresponding to the EID name data to the gateway subsystem through the data packet forwarding subsystem;
and 307) the gateway subsystem receives the network address NA corresponding to the EID name data, acquires original data corresponding to the network address NA, sends the original data corresponding to the network address NA to the user interaction subsystem through the first ICN network communication module and the data packet forwarding subsystem, and transmits the original data corresponding to the network address NA to a user or an upper application according to a RESTful framework to realize open service of the original data in a content data source.
In other embodiments, the original data in the content data source is a 650MB movie video; HRN name data is the human readable name of the video called "star wars 6"; the EID name data "c 368b.7e." is a computer-readable globally unique 160bit code; the network address NA of "210.75.225.3" is a network address, allowing the use of IP as the NA.
The user interaction subsystem inquires EID name data corresponding to the HRN name data from the global naming subsystem by any HRN name data input by a user or an application, then inquires a network address NA from the global analysis subsystem by using the EID name data, and then sends the network address NA to the gateway subsystem, and the gateway subsystem inquires and acquires original data corresponding to the network address NA, namely a certain 650MB movie video; and finally, transmitting and completely packaging the original data corresponding to the network address NA through a user interaction subsystem, and providing the original data to a user or an upper application through a user interface of a RESTful architecture so as to realize the open service of the original data of the content data source.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (11)
1. A data open service system based on ICN naming is characterized by comprising:
the gateway subsystem is used for acquiring and storing the original data of the content data source; registering the original data as HRN name data, and storing the HRN name data in a content and name binding database; performing intra-domain name exchange on the HRN name data, and sending the HRN name data to a global naming subsystem through a data packet forwarding subsystem; the system is also used for sending the mapping relation between the EID name data and the network address NA to the global analysis subsystem; the system is also used for sending the original data corresponding to the network address NA to the user interaction subsystem;
the data packet forwarding subsystem is used for respectively forwarding and communicating data with the gateway subsystem, the global naming subsystem, the global analysis subsystem and the user interaction subsystem;
the global naming subsystem is used for receiving the HRN name data, naming the HRN name data as EID name data containing prefixes, middles and suffixes by adopting a hash function of sha-1, and carrying out safety authentication to realize ICN naming;
the global analysis subsystem is used for registering and storing the mapping relation between the EID name data and the network address NA for inquiry; the system is also used for analyzing EID name data corresponding to HRN name data input by a user or an upper layer application, retrieving and inquiring a corresponding network address NA;
the user interaction subsystem is used for interacting with a user or an upper application; the system is used for acquiring EID name data corresponding to the input HRN name data and a network address NA corresponding to the EID name data; and the gateway subsystem is also used for acquiring the original data corresponding to the network address NA sent by the gateway subsystem and providing a RESTful user interface to transmit the original data to a user or an upper application so as to realize the open service of the original data in the content data source.
2. The data open service system as claimed in claim 1, wherein the gateway subsystem further comprises:
the data acquisition module is used for acquiring various original data of the content data source and sending the original data to the content storage module;
the content storage module is used for receiving the various types of original data and selecting a storage mode of direct storage or storage after preprocessing according to different purposes;
the content registration module is used for registering the various types of original data as HRN name data; wherein the HRN name data is original data with an HRN name;
the content and name binding database is used for storing the HRN name data, the mapping relation between the EID name data and the network address NA sent by the global naming subsystem and the original data corresponding to the network address NA;
the content sending module is used for sending the HRN name data to the first ICN communication module; the first ICN communication module is also used for sending the original data corresponding to the network address NA to the first ICN communication module;
the domain name conversion module is used for converting the EID name data and the LID;
and the first ICN network communication module is used for forwarding and communicating the HRN name data and the original data corresponding to the network address NA with the data packet forwarding subsystem.
3. The data open service system according to claim 1, wherein the global naming sub-system further comprises:
the content naming module is used for receiving the HRN name data after receiving a naming request of the HRN name data, and naming the HRN name data as EID name data containing prefixes, middles and suffixes by adopting a hash function of sha-1 and a flattened fixed length of LID;
the content authentication module is used for carrying out security authentication on the EID name data; specifically, whether the authentication request is a legal request is judged according to the public key information and the private key information; if the public key and the private key of the authentication request are matched, the authentication request is judged to be a legal request, the security authentication is successful, and the EID name data is sent to the gateway subsystem through the data packet forwarding subsystem; if the public key and the private key of the authentication request are not matched, judging the request as an illegal request, returning an illegal error and returning a security authentication failure;
and the second ICN network communication module is used for forwarding and communicating the EID name data with the data packet forwarding subsystem.
4. The data open service system according to claim 3, wherein the content naming module specifically comprises: through a hash function and the flattening fixed length of the LID, HRN name data are converted into EID name data; adding a fixed-length aggregation class name for aggregation to the prefix of the EID name data; setting a fixed length of a hash containing the HRN in the middle of the EID name data; and adds version and fragment information in the suffix of the EID name data.
5. The data open service system according to claim 1, wherein the global parsing subsystem further comprises:
the third ICN network communication module is configured to perform, with the packet forwarding subsystem, forwarding and communication of the mapping relationship between the EID name data and the network address NA, the EID name data corresponding to the input HRN name data, and the network address NA corresponding to the EID name data;
the request processing module is used for registering the mapping relation between the EID name data and the network address NA; the system is also used for analyzing EID name data corresponding to HRN name data input by a user or an upper layer application, retrieving and inquiring a corresponding network address NA;
and the global analysis database is used for storing the mapping relation between the EID name data and the network address NA, the EID name data and the network address NA thereof for query operation.
6. The data open service system according to claim 5, wherein the global parsing database further comprises: and when the existing EID name data is stored, covering the network address NA corresponding to the existing EID name data to obtain the latest network address NA.
7. The data open service system of claim 1, wherein the user interaction subsystem further comprises:
the user interface module is used for providing any HRN name data required to be input; the system is also used for acquiring the original data corresponding to the network address NA and transmitting the original data corresponding to the network address NA to a user or an upper application according to a RESTful framework so as to realize the open service of the original data in the content data source;
the name conversion agent module is used for acquiring the HRN name data required to be input, sending the HRN name data required to be input to the global naming subsystem, inquiring and acquiring the corresponding EID name data, sending the EID name data to the global analysis subsystem, analyzing the EID name data, and inquiring and acquiring the corresponding network address NA; the system is also used for sending a network address NA to the gateway subsystem and inquiring corresponding original data of the network address NA;
the content storage module is used for receiving the network address NA, completely packaging the network address NA and storing the network address NA;
and the fourth ICN communication module is configured to forward and communicate, with the packet forwarding subsystem, EID name data corresponding to the HRN name data that needs to be input, a network address NA corresponding to the EID name data, and original data corresponding to the network address NA.
8. A method for opening a service system based on ICN naming data according to any one of claims 1-7, characterized in that it comprises: content registration and release, content network address NA change detection and re-registration and content acquisition.
9. The method according to claim 8, wherein the registering and publishing of the content specifically comprises:
step 101) a data acquisition module of a gateway subsystem acquires various types of original data of an original data source, registers the various types of original data as HRN name data, and stores the HRN name data;
step 102) the gateway subsystem sends HRN name data and a name request thereof to the global naming subsystem through the data packet forwarding subsystem;
step 103) after the global naming subsystem receives the naming request of the step 102), HRN name data are received and named as EID name data, security authentication is carried out, and after the security authentication is passed, the EID name data are returned to the gateway subsystem through the data packet forwarding subsystem;
step 104) the gateway subsystem receives the EID name data in the step 103), and sends the mapping relation between the EID name data and the network address NA to the global analysis subsystem through the first ICN network communication module and the data packet forwarding subsystem;
step 105) the global analysis subsystem receives the mapping relation between the EID name data and the network address NA and stores the mapping relation to a global analysis database; then, the first success message is returned to the gateway subsystem through the data packet forwarding subsystem; and the first successful message is a mapping relation between the EID name data and the network address NA.
10. The method according to claim 8, wherein the detecting and re-registering of the change of the content Network Address (NA) specifically comprises:
the gateway subsystem continuously detects whether the network address NA changes, if the network address NA changes, all EID name data are retrieved, and then an updating request of the mapping relation between all EID name data and the network address NA is sent to the global analysis subsystem through the first ICN communication module and the data packet forwarding subsystem; then the global analysis subsystem receives the updating request, updates the EID name data according to the new network address NA, stores the mapping relation between the new EID name data and the new network address NA to the global analysis database so as to update the global analysis database, and sends a second success message to the gateway subsystem through the third ICN communication module and the data packet forwarding subsystem; the second success message specifically refers to a mapping relationship between the updated EID name data and the new network address NA.
11. The method according to claim 8, wherein the content acquisition specifically comprises:
step 301) inputting any HRN name data by a user or an upper-layer application, and sending the HRN name data to a user interaction subsystem;
step 302) the user interaction subsystem acquires the HRN name data and sends the HRN name data and the naming query request thereof to the global naming subsystem through the data packet forwarding subsystem;
step 303) after receiving the naming inquiry request, the global naming subsystem retrieves and inquires the EID name data corresponding to the HRN name data, and returns the EID name data to the user interaction subsystem through the second ICN network communication module and the data packet forwarding subsystem;
step 304) the user interaction subsystem receives the EID name data, and sends the EID name data and the analysis request thereof to the global analysis subsystem through the fourth ICN network communication module and the data packet forwarding subsystem;
step 305), after receiving the analysis request, the global analysis subsystem retrieves and queries a global analysis database to obtain a network address NA corresponding to the EID name data, and returns the network address NA corresponding to the EID name data to the user interaction subsystem through a third ICN network communication module and a data packet forwarding subsystem;
step 306) the user interaction subsystem sends the network address NA corresponding to the EID name data to the gateway subsystem through the data packet forwarding subsystem;
and 307) the gateway subsystem receives the network address NA corresponding to the EID name data, acquires original data corresponding to the network address NA, sends the original data corresponding to the network address NA to the user interaction subsystem through the first ICN network communication module and the data packet forwarding subsystem, and transmits the original data corresponding to the network address NA to a user or an upper application according to a RESTful framework to realize open service of the original data in a content data source.
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