CN102523630A - Wireless ubiquitous network system structure - Google Patents

Abstract

The invention relates to a wireless ubiquitous network architecture and belongs to the technical field of wireless networks. The wireless ubiquitous network architecture includes: a ubiquitous resource aggregation layer, a ubiquitous network gateway middleware, a business capability aggregation layer, and a service aggregation layer. The ubiquitous resource aggregation layer organizes heterogeneous ubiquitous resources and shields the heterogeneity of equipment provided by ubiquitous resources; the ubiquitous gateway middleware converts the 6LoWPAN data transmitted by heterogeneous ubiquitous resources into IPv6 data; the business capability aggregation layer distinguishes 1. Manage the business capabilities of ubiquitous resources and shield the heterogeneity of wireless devices; the service aggregation layer comprehensively manages ubiquitous resources and generates corresponding web services to provide users with a unified application interface. The wireless ubiquitous network system solves the data diversity problem of different IP layers in the process of ubiquitous resource fusion; the unified application programming interface provides a new way for open and hybrid ubiquitous network service innovation and development.

Description

A Wireless Ubiquitous Network Architecture

technical field

The invention relates to a wireless ubiquitous network architecture and belongs to the technical field of wireless networks.

Background technique

With the development of IT technology and communication technology, the communication network will not only meet the communication needs between people, but also further develop to the communication between people and machines (or objects), and between machines and machines. Evolving in the direction of ubiquitous networks. In the ubiquitous network environment, a variety of network technologies complement each other and develop together, and with the support of microelectronics technology, embedded technology, short-distance communication technology, sensor technology, and smart label technology, they will eventually contribute to the "ubiquitous information society". accomplish".

The wireless ubiquitous network refers to the realization of on-demand information acquisition, transmission, storage, and cognition between people and people, people and things, and things and things based on the needs of individuals and society, using existing and new network technologies. , decision-making, use and other services, the wireless ubiquitous network has super environmental awareness, content awareness and intelligence, and provides ubiquitous and all-encompassing information services and applications for individuals and society. How to aggregate and manage ubiquitous network resources and build a wireless ubiquitous network application environment is a problem that must be solved to form a new ubiquitous network business model.

The ubiquitous network is an extension and upgrade of the existing network architecture management model in terms of business model, industrial characteristics, and network system architecture. Because it involves a ubiquitous network, the ubiquitous network generally exists in a wireless manner, while There are a large number of interactive entities in the ubiquitous network, and it has become a consensus in the industry to unify the ubiquitous network with IP. However, there is still diversity above and below the IP layer. Below the network layer, there is heterogeneity between massive devices and communication protocols; above the network layer, different application development faces heterogeneous devices and heterogeneous data, and there is no unified application program interface, making it difficult to quickly develop. Therefore, a wireless ubiquitous network architecture is needed, which integrates ubiquitous heterogeneous networks, cooperates with all levels in the wireless ubiquitous network architecture, aggregates resources from the bottom layer to the upper layer, and provides a unified solution for application layer development. API, forming a unified industry standard model.

Contents of the invention

The technical problem to be solved by the present invention is to provide a wireless ubiquitous network architecture in view of the deficiency of the above-mentioned background technology.

The present invention adopts the following technical solutions in order to realize the above-mentioned purpose of the invention:

A wireless ubiquitous network architecture includes ubiquitous resource aggregation layer, ubiquitous network gateway middleware, business capability aggregation layer, and service aggregation layer; among them,

The ubiquitous resource aggregation layer is used to organize heterogeneous ubiquitous resources and shield the heterogeneity of ubiquitous resources providing equipment;

Ubiquitous gateway middleware is used to convert 6LoWPAN data transmitted by heterogeneous ubiquitous resources into IPv6 data;

The business capability aggregation layer is used to distinguish and manage the business capabilities of ubiquitous resources, and to shield the heterogeneity of wireless devices;

The service aggregation layer is comprehensively used to manage ubiquitous resources, generate corresponding web services, and provide users with a unified application interface.

In the architecture of the wireless ubiquitous network, the service capability aggregation layer includes: resource authentication and access control middleware, service capability server, framework server, and application server;

The resource authentication and access control middleware is used to authenticate ubiquitous resources to obtain available framework interfaces, and allow access to ubiquitous resources when judging that the ubiquitous resources to be accessed meet the specifications;

The framework server is used to provide a unified application programming interface according to the available framework interfaces;

The service capability server is used to store the authentication result and access information of the resource authentication and access control middleware;

The application server is used to generate corresponding web service services according to the accessed ubiquitous resources.

The present invention adopts the above-mentioned technical scheme, and has the following beneficial effects:

(1) Aggregate and manage ubiquitous network resources, shield the heterogeneity of ubiquitous resource provision equipment, and solve the problem of unification of ubiquitous network resources.

(2) Collaborate with all levels in the wireless ubiquitous network architecture to aggregate resources step by step from the bottom layer to the upper layer, integrate ubiquitous heterogeneous networks, and solve the diversity problem above and below the IP layer.

(3) Provide a unified API for application layer development, form a unified industry standard model, and provide a new way for the innovation and development of open and mash-up ubiquitous network services.

Description of drawings

FIG. 1 is a schematic diagram of a wireless ubiquitous network architecture.

Fig. 2 is a flowchart of ubiquitous resource authentication and access control.

Fig. 3 is a schematic diagram of a service capability aggregation layer.

Detailed ways

Below in conjunction with accompanying drawing, the technical scheme of invention is described in detail:

The wireless ubiquitous network architecture shown in Figure 1 includes: ubiquitous resource aggregation layer, ubiquitous network gateway middleware, business capability aggregation layer, and service aggregation layer.

The ubiquitous resource aggregation layer organizes heterogeneous ubiquitous resources and shields the heterogeneity of equipment provided by ubiquitous resources. Support IPv6 and wireless communication, introduce 6LoWPAN technology, and conduct low-power wireless communication based on IEEE802.15.4 standard. Unified processing of non-standard lightweight IPv6 data, converting 6LoWPAN IPv6 data packets into standard IPv6 data packets through ubiquitous network gateway middleware, providing standard IPv6 services for upper-layer applications.

The ubiquitous gateway middleware converts 6LoWPAN data transmitted by heterogeneous ubiquitous resources into IPv6 data. The wireless transmission of ubiquitous resources adopts 6LoWPAN technology, which compresses and fragments IPv6 messages, so that it can effectively run on the IEEE802.15.4 protocol.

The transport layer protocol used in the ubiquitous resource node protocol stack is the UDP protocol. At this time, the UDP datagram is also compressed into a format suitable for 6LoWPAN data transmission. For reasons of performance, efficiency, and complexity, the transport layer in lightweight IPv6 addressing does not use the TCP protocol. ICMPv6 is mainly used for control messages, such as ICMP replay, destination unreachable, and neighbor discovery messages.

The format conversion between standard IPv6 and simplified IPv6 is located at the boundary of the 6LoWPAN domain, that is, the ubiquitous network gateway. The ubiquitous network gateway needs to connect to the communication network using the standard IP protocol, and includes a standard IPv6 protocol stack. At the same time, the ubiquitous network gateway middleware is responsible for processing the conversion between 6LoWPAN and standard IPv6, as well as the 6LoWPAN neighbor discovery function, realizing the discovery and automatic configuration of heterogeneous wireless networks and providing unified IPv6 services for the upper layer.

The business capability aggregation layer uniformly distinguishes and manages the business capabilities of ubiquitous resources (the ability to process specific applications in the upper layer, including hardware architecture and software logic), and shields the heterogeneity of wireless devices (RFID, sensor devices, wireless network nodes, etc.) . Through the ubiquitous resource authentication and access control middleware in the business resource integrated management platform, ubiquitous resources are authenticated, authorized, and managed to provide stable ubiquitous resources and reliable access methods for upper-level applications.

As shown in Figure 3: the business capability aggregation layer consists of the following parts: application entity, application server, business capability server, and business resource integrated management platform framework.

The service capability server is used to provide service interfaces. This type of application programming interface can access a series of basic service functions provided by the service server, such as establishing or releasing routes, interacting with users, sending user messages, setting QoS levels, etc. Service providers can call them according to different business logics to realize different services.

The framework server is used to provide the framework interface, and all applications and services need to register on the framework server if they want to call the business resource integrated management platform interface. The framework server provides necessary security and management support for business interfaces, such as service registration and discovery, authentication and authorization, service ordering, integrity management, etc.

As shown in Figure 2: resource authentication and access control are divided into user and ubiquitous resource authentication and access control. Obtain available framework interfaces through resource authentication, and use open interfaces to obtain information about authorized network service capability characteristics. When accessing resources, only ubiquitous resources that meet the specifications will be authorized and allowed to access by the business resource integrated management platform.

This method performs authentication through the method of "service configuration file identification (SPID) + business ID", and supports batch authentication. When a user logs in to the portal of the resource management platform for user authentication, it supports all the user's status, Data such as relevant information is returned to the portal.

The business resource integrated management platform interface abstracts and encapsulates business APIs, enabling business developers to quickly and conveniently develop new web services.

The service aggregation layer comprehensively manages ubiquitous resources and generates corresponding web services, provides users with a unified application interface, and generates corresponding web applications according to existing resources and application requirements.

The service aggregation and application generation platform combines various types of data to create new customized service network applications, which has the characteristics of web2.0.

The architecture is divided into 3 parts: API/data provider (aggregation source), aggregation site (aggregation logic) and user interface (aggregation logic presentation), which are logically and physically separated from each other. Aggregate different content sources through open API, RSS, etc., and increase interaction with users with the help of AJAX. Construct a new application software development mode through the integration principle and the development tool of graphical interface.

The workflow of the wireless ubiquitous network architecture is as follows:

1. Ubiquitous resource aggregation

1) Ubiquitous resource equipment collects raw data, or responds to upper layer messages to generate response messages.

2) 6LoWPAN technology is used to subpackage data, and IPv6 data packets are forwarded through 2.4G wireless frequency band based on IEEE802.15.4 protocol.

3) The ubiquitous network gateway receives 6LoWPAN data packets, parses them into standard IPv6 data packets, and performs routing. The ubiquitous network gateway can be realized by an embedded Linux system, and any PC with relevant capabilities can also act as a ubiquitous network gateway.

2. Business Capability Aggregation

1) When accessing for the first time, the ubiquitous network gateway sends an access request to the service resource management platform, and the service resource integrated management platform returns the authentication result to the ubiquitous network gateway according to the status of the ubiquitous resources in the service capability server. Otherwise go to 4)

2) The ubiquitous network gateway decides whether to allow access to the resource according to the authentication response of the service resource integrated management platform, and if allowed, sends a user access response to the ubiquitous resource.

3) Ubiquitous resources send a confirmation access message to the business resource integrated management platform after receiving the user access response, and the business capability server saves the relevant authentication and access information of the ubiquitous resources, and records them on the business resource comprehensive management platform. Ubiquitous resource state information is maintained in .

4) The business resource management platform transfers the application data to the application server, and the application server sends data to the service aggregation application generation platform.

3. Service aggregation

1) To receive the data sent by the lower layer, the content provided by the application server usually has three types, namely data type, application logic type and user interface type, which correspond to the data provided, application logic function and GUI respectively. In order to facilitate data retrieval, Providers usually provide their content externally through the Web protocol.

2) The service aggregation application generation platform sends the initial interface to the user, who makes a call to retrieve the updated content. These calls can be made from the user directly to the third-party source or back to the originating server, which acts as a proxy for the third-party content.

3) The service aggregation application generation platform aggregates services. There are two ways to aggregate content. One is to directly use server-side dynamic content generation technology, such as JSP, PHP or Ruby to implement applications similar to traditional Web. The user interface is generated by client script or applet.

4) Present the application to the user in a graphical way and interact with the user, combine Ajax technology to display the rich UI, and use the content retrieved asynchronously from multiple sources to update itself in place.

5) The user receives or sends a data request, wherein the sent data can be reversely transmitted to ubiquitous resources according to the architecture.

Claims (2)

1. A wireless ubiquitous network architecture, characterized in that: the system comprises a ubiquitous resource aggregation layer, a ubiquitous network gateway middleware, a business capability aggregation layer and a service aggregation layer; wherein,

the ubiquitous resource aggregation layer is used for organizing heterogeneous ubiquitous resources and shielding the heterogeneity of the ubiquitous resource providing equipment;

the ubiquitous gateway middleware is used for converting 6LoWPAN data transmitted by heterogeneous ubiquitous resources into IPv6 data;

the service capability aggregation layer is used for distinguishing and managing the service capability of ubiquitous resources and shielding the heterogeneity of the wireless equipment;

the service aggregation layer is comprehensively used for managing ubiquitous resources, generating corresponding web services and providing a uniform application interface for users.

2. The architecture of a wireless ubiquitous network according to claim 1, wherein: the service capability aggregation layer comprises: the system comprises a resource authentication and access control middleware, a service capability server, a frame server and an application server;

the resource authentication and access control middleware is used for authenticating the ubiquitous resources to obtain an available frame interface and allowing the ubiquitous resources to be accessed when the ubiquitous resources to be accessed are judged to meet the specification;

the framework server is used for providing a uniform application programming interface according to the available framework interface;

the service capability server is used for storing the authentication result and the access information of the resource authentication and access control middleware;

and the application server is used for generating corresponding web service business according to the accessed ubiquitous resources.

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