WO2008080275A1

WO2008080275A1 - Integrated network construction method and integrated network generalized exchange route device

Info

Publication number: WO2008080275A1
Application number: PCT/CN2007/001395
Authority: WO
Inventors: Hongke Zhang; Shuigen Yang; Sidong Zhang; Yajuan Qin; Huachun Zhou; Shuai Gao; Ying Liu; Wei Su; Bo Wang; Dong Yang; Ping Dong
Original assignee: Beijing Jiaotong University
Priority date: 2006-12-28
Filing date: 2007-04-26
Publication date: 2008-07-10
Also published as: CN101212425A

Abstract

One kind of integrated network supporting general service is disclosed, enabling to support many kinds of services in the network. The integrated network of this invention includes two layers: the network communication layer and the service layer. The network communication layer is used for providing an integrated network communications platform, and the service layer includes many kinds of network service. The virtual access modules and the virtual backbone modules are constructed in the network communication layer, and the access identifier parse mapping is introduced between the virtual access modules and the virtual backbone modules. The virtual access modules retransmit the data by the access identifier, and the virtual backbone modules use the internal exchange route identifier replacing the access identifier to retransmit the data, and the data packet route identifier is replaced by the original access identifier after arriving the opposite communication access router.

Description

Method for constructing integrated network and generalized exchange routing device for integrated network

The invention relates to a method for constructing an integrated network and a generalized switching router device for an integrated network, which is a network communication technology, in particular to a network architecture for providing multiple services, and a routing device.

Background technique

With the development of science and technology, information has become a huge driving force for the advancement of society. Information networks play a decisive role in the economic and social development of countries.

The original design idea of the existing information network is basically a decoupling mode in which the network supports a main service. On this basis, the evolution and development are difficult to break through the limitations of the original design ideas, and cannot meet the diversity requirements of the network and services. For example, the telecommunication network was originally designed for voice service transmission, which can provide carrier-class symmetric traffic quality, but its circuit-based three-layer tree-like planar topology determines its network efficiency and at the same time, the telecommunication network bandwidth. Restriction makes it difficult to adapt to the needs of broadband streaming services and the like.

The Internet was originally designed for data service transmission, conforming to the four-layer architecture of TCP/IP (including subnet layer, network layer, transport layer, application layer), using data-oriented packet switching technology to transmit data and providing "best effort" For "services, it has a high transmission rate and can be interconnected by heterogeneous networks. However, the best-effort service feature provided by the Internet does not guarantee the reliability of the transmission at all, and the retransmission delay introduced by the transmission layer TCP (Transmission Control Protocol) requires high real-time performance for voice and video. The business is also intolerable, so it is not suitable to support the access needs of multiple services, and can not provide multiple services for diversified users; In addition, the Internet design is initially for fixed terminals, it can not be very good Support terminal mobility. Interconnection The topology of the network is a scale-free network with a power-law structure. It is this scale-free power-law structure topology that makes the Internet vulnerable to malicious attacks.

It is of great significance to combine voice, data and image services to achieve rapid communication and resource sharing of business information. Therefore, all countries in the world have invested a lot of manpower and material resources to carry out basic research on the new information network system.

In 2002, Japan's NTT Corporation developed a next-generation network and network structure development plan called RENA (Resonant Network Architecture), which aims to establish a network where everyone can communicate freely. As far as current development is concerned, due to the large-scale deployment of broadband access, the RENA program has been able to provide users with many new value-added services. At the same time, there has been some improvement in achieving manageable service quality, high security, high reliability and universal mobility, and friendliness to end users. However, the RENA program does not address the many basic issues of the Internet's extensive mobility, credibility, multi-service convergence, universality, etc., but is an expedient measure for the development of the Internet.

In 2003, the US Natural Science Foundation of the United States provided $7.5 million to launch the famous

"100x100" next-generation network construction project, which plans to achieve 100Mb/s Internet access for 100 million households by 2010, and build a nationwide communication network to make the network as popular as the phone. Experiment with this network. Design principles, network technologies, management techniques and applications. Advocates of the project believe that it is difficult to implement quality of service control in today's connectionless networks. It is recommended to introduce connection-oriented features similar to traditional telecommunication networks in the existing Internet.

Although the "100x100" project proposes a solution to some of the problems faced by the Internet, such as quality of service control, effective network management, etc., it is difficult to fundamentally solve the universal requirements of the current information network transmission of many different types of services.

In 2004, BT proposed a "21CN" next-generation network construction plan that is expected to invest 80 million pounds. Its main goal is to build a next-generation network that replaces the existing telephone switching network and the Internet. Form a network of multi-service convergence. Its overall goal is to access the network at any rate, from any device, anywhere. The main ideas of the "21CN" evolution are: to reduce the access cost and improve the efficiency and automation by implementing the convergence of the access layer; at the edge of the service, the number of service edge devices is greatly reduced by using the metropolitan area network router; Use the core network router to replace the original core network switch to build a next-generation core network with security and quality of service capabilities. The "21CN" program partially solved problems such as mobility and network security, but the project did not provide fundamental theoretical support for the future development of the information network, but it is only a major repair and improvement of the current network technology.

In August 2005, the US Natural Science Foundation of China proposed the "GENI (Global Environment for Networking)" project, which invested $300 million to fundamentally redesign the Internet to address existing The problem is to create a next-generation Internet that is more suitable for the future computer environment. It mainly consists of a research project and building a test environment. The project's research plan includes designing a new architecture that can work with new wireless technologies, optical communication technologies, and pervasive computing technologies. This project is the first time to provide clear suggestions and guidance for the development of a new generation of information networks from the basic theory.

In December 2005, the US Natural Science Foundation of China proposed the "FIND, Future Internet Network Design" project to design a network structure within the next 15 years. The project focuses on network architecture, principles and design. The research plan of the project mainly includes the network structure supporting sensor network, embedded system, etc.; information access, location management, identity management under the new network structure; designing the core network architecture, the core network architecture can Optical communication technologies cooperate with each other. The project provides advice and guidance for the development of a new generation of information networks.

In summary, the existing information network has many problems that are difficult to solve due to the limitations of the original model. However, the current research on the new generation of information network has not yet formed a complete system, lacking the original innovation of the basic theory, so it is urgent to break through the original With the limitations of the network, design a new network architecture, Create an integrated network that combines the strengths of each family and adapts to long-term application needs, and solves the service expansion, credibility (security, reliability, controllability, manageability) and mobility of existing information networks. There are problems in the aspect. The existing information network is basically integrated and evolved under the original mode of supporting a main service. Due to the limitations of the original model, there are many problems that are difficult to solve, and it is impossible to meet the current and future service diversification requirements in essence. . Summary of the invention

The invention breaks through the limitations of the original network, designs a brand-new network architecture, and creates an integrated network structure that has the advantages of each family and can adapt to long-term application requirements, so that multiple services can be supported on one network and solved. Existing information networks have problems in terms of service extension, credibility (security, reliability, controllability and manageability), and mobility. The present invention proposes "a new architecture for an integrated network supporting universal services", and the contents of the invention and the "Global Environment for Networking Innovations" (GENI, Global Environment for Networking Innovations) and "Future Internet Design" (FIND, Future Internet Network) The research content of the Design is consistent, and the architecture, principle and mechanism of the new generation information network are proposed. The technical solution of the present invention is: a method for constructing an integrated network supporting universal services, which is characterized by the steps described:

Establish a network layer;

Establishing a service layer on the basis of the Netcom layer;

Various service plugins are installed on the basis of the service layer.

In the network layer construction step:

Construct a virtual access module at the Netcom layer;

Construct a virtual backbone module at the Netcom layer;

An access identifier resolution mapping is introduced between the virtual access module and the virtual backbone module. The access identifier resolution mapping is:

The communication steps in the Netcom layer:

The transmitting virtual access module sends the data packet by using the access identifier;

The virtual backbone module forwards the data packet by using the exchange route identifier instead of the access identifier.

The receiving virtual access module receives the data packet with the access identifier.

A generalized switching router for an integrated network supporting universal services, comprising: a new network protocol device supporting terminal mobility, subnet mobility, and dynamically changing networks of an integrated network; an access identifier based on an integrated network and Corresponding devices for exchanging route identification separation aggregation mapping theory; providing users with multi-granular quality of service guarantee network resources and service quality management devices; various wireless network interfaces and sensor network interfaces.

Advantageous Effects of the Invention: The present invention starts from the existing information network architecture, proposes a new architecture of integrated network and universal service, and further designs an integrated network system supporting universal services on the basis of the architecture. The structure and the corresponding technical solutions have the following beneficial effects:

(1) enabling various access networks and terminals (such as fixed networks, mobile networks and sensing networks in the Internet, various access networks and terminals in the telecommunication network, etc.) to access the backbone network in a unified manner. It overcomes the single problem of access networks of traditional Internet and telecommunication networks and expands the scope of network services.

(2) to ensure the privacy and security of users. The access identifiers of the various access networks represent their identities, while the switched route identities are only used for the core network to exchange routes. After the access identifier and the exchange route identifier are separated, the access identifier representing the user identity does not propagate on the core network, making it impossible for other users to analyze the identity of the user by intercepting the information of the core network, thereby ensuring the privacy of the user; The ability to intercept their information through the identity of the user ensures the security of the user information.

(3) Guaranteed controllability and manageability of the network. When applying for an access identifier, the network administrator performs access control and authentication on various access networks according to the subscription information of the user, and the result of the authentication determines whether to accept the user connection request and decides to be the user. The level of quality of service provided.

(4) It ensures the mobility and sensing of various access networks and users. After the access network is moved to other locations, only the exchange route identifier needs to be changed. The access identifier representing the user identity does not need to be changed, and only the mapping relationship between the exchange route identifier and the access identifier needs to be changed. In this way, the user's connection can be guaranteed to continue to accept various services without interruption.

DRAWINGS

The invention is further explained below in conjunction with the drawings and embodiments.

Figure 1 is a schematic diagram of the architecture of the present invention;

2 is a schematic structural view of a mesh layer of the present invention;

FIG. 3 is a schematic diagram of a generalized routing architecture model of the present invention.

detailed description

Embodiment 1 - The hardware used in this embodiment includes: the Internet, a fixed telephone network, a mobile communication network, a television network, an ad hoc network, and all networks for transmitting data, voice, images, video, or streaming media. The steps to establish an integrated network and universally applicable services in these networks are:

Establish a network layer;

Establishing a service layer on the basis of the Netcom layer;

Various service plugins are installed on the basis of the service layer.

The new architecture model of integrated network and universal service implementing the present invention is shown in Fig. 1. It includes two major parts: "Netcom layer" and "service layer".

The "Netcom layer" includes a virtual access module and a virtual backbone module, and provides an integrated network communication platform for data and voice services. Various services are grouped in a "specific" group in the "Netcom layer" Transfer. The "Netcom layer" adopts the "indirect communication" mode: the virtual access module uses the access identifier to forward data, and the virtual backbone module uses the internal switched route identifier to replace the access identifier forwarding, and after reaching the generalized switching router of the communication peer, the data packet The exchange route identifier is replaced by the original access identifier; the virtual access module is responsible for the access of the communication terminal, the virtual backbone module solves the location management and exchange routing theory, the user's privacy, network security, controllable manageability And mobility in the "Netcom layer" is very good.

The "service layer" is responsible for the session, control and management of various services, including various network services provided by operators or third-party value-added service providers, mainly voice, data, streaming media, etc. Different services use the same "Service layer" hosting. Various services, network resources, and users are identified by unique identifiers, each application is bound to a service identifier, and parsing from the service identifier to the connection identifier, from the connection identifier to the exchange of the routing identifier Thus, the service identification and connection identification analysis mapping theory of the universal service is established. Operators or third-party value-added service providers will provide users with guaranteed and personalized services through an integrated network personalized service model. The service layer also includes a variety of service function components, including media conversion, media distribution, billing and location services, virtual home environment and other service components and session management, resource management, mobility management, credibility management, quality of service management, etc. Manage components.

The integrated network and the universal service system are a new network architecture that is different from the seven-layer network system of the Open System Interconnection (OSI) and the Internet four-layer network system. The integrated network and the universal service system organically integrate users, services and network resources into one, which is a good integration of the network and provides universal services for users. The ultimate goal of the present invention is to replace the existing network architecture with an integrated network and a pervasive service architecture, thereby establishing an integrated network platform, providing multi-granular quality of service for multi-service transmission, ensuring provision to users. Universal service.

Integrated network architecture: in order to provide a diverse network and terminal on an integrated network platform Access, ensuring the security, reliability, controllability, mobility, and sensing of information interaction, and the ability to provide universal services, in the new architecture of integrated networks and universal services" The Netcom layer has established an integrated network architecture, as shown in Figure 2. Netcom layer construction steps:

Construct a virtual access module at the Netcom layer;

Construct a virtual backbone module at the Netcom layer;

An access identifier resolution mapping is introduced between the virtual access module and the virtual backbone module.

In the integrated network architecture model, the theory of separation and aggregation mapping of integrated network access identifiers and switched route identifiers is proposed. Two virtual modules are created and introduced: virtual access module and virtual backbone module; one analytical map: access identifier Parse the map. The virtual access module introduces the concept and mechanism of the access identifier ID to implement unified access of various fixed, mobile, and sensor networks. The virtual backbone module provides exchanged route identification IDs for various access networks for use on the core network. Generalized switched routing and pathfinding; The access identity resolution mapping maps multiple switched route identification IDs to multiple connection identification IDs.

The "Netcom layer" adopts the "indirect communication" mode: the virtual access module uses the access identifier to forward data, and the virtual backbone module uses the internal switched route identifier to replace the access identifier forwarding, and after reaching the generalized switching router of the communication peer, the data packet The exchange route identifier is replaced by the original access identifier; the virtual access module is responsible for accessing the communication terminal, the virtual backbone module solves the location management and exchange routing theory, the user's privacy, network security, controllability, Controlling manageability and mobility are well realized at the "Netcom layer". Communication steps in the Netcom layer:

The virtual access module of the sending end sends the data packet by using the access identifier; the data packet sent by the sending end includes the access identifier of the source node and the destination node, and the virtual access module of the sending end sends the data packet by using the access identifier; The virtual backbone module replaces the access identifier with the exchange route identifier; when the data packet sent by the sender arrives at the access switch router of the access end, the integrated access switch router connects the source node and the destination node in the data packet. The ingress identifier is replaced with the exchange route identifier of the source node and the exchange route identifier of the destination node, and the modified data packet is sent to the virtual backbone module, and the generalized switching router in the virtual backbone module uses the exchange route identifier in the data packet to perform routing. , transmission.

The receiving virtual access module receives the data packet by using the access identifier; when the data packet arrives at the integrated access switching router at the receiving end, the integrated access switching router separates the switching route identifiers of the source node and the destination node in the data packet respectively. The access identifier of the source node and the access identifier of the destination node are replaced, and the data packet is forwarded to the receiving end by using the access identifier.

Virtual access module: This layer introduces the access identifier ID as the identity of the terminal access. Each terminal has a globally unique identity, that is, each terminal has a globally unique access identification ID. Various access networks or terminals (such as fixed networks, mobile networks and sensor networks in the Internet, various access networks and terminals in the telecommunication network, etc.) are accessed in a unified manner, overcoming the traditional information network. The problem of single access network and access terminal expands the scope of network services. In addition, when various access networks or terminals move to other locations, the access identification ID of the terminal does not need to be changed, so that the connection of the user does not need to be interrupted.

Virtual backbone module: This layer introduces the exchange route identification ID for generalized switched routing and pathfinding on the core network. When the data packet is transmitted on the backbone network, the virtual backbone module uses the internal switched route identifier ID instead of the access identifier ID for forwarding; after reaching the generalized switching router of the communication peer, the exchanged route identifier ID of the data packet is replaced with the original interface. Enter the ID. In this way, when the data packet is transmitted on the core network, other users cannot analyze the identity of the user by intercepting the information of the core network, thereby ensuring the privacy of the user; and it is impossible to intercept their information through the identity of the user, thereby ensuring the user. Information security. Access Identity Resolution Map: The Access Identity Resolution Map maps multiple exchange route identification IDs to multiple connection identification IDs or maps multiple connection identification IDs to multiple exchange route identification IDs. The access identifier resolution mapping is defined as follows -

Zt

Zrp

In the formula (1), it represents the exchange route identifier in the integrated network, where i represents the terminal type, t represents a certain routing, RID is the exchange route identification ID; ^ represents the access identifier of the end system, and the identifier is different. Terminal, q represents the access location, AID represents the access identifier ID; ^Ω (·) is the resolution mapping transformation, completes the mapping of the exchange route identifier ID to the access identifier ID; its inverse mapping ") maps different access identifier IDs The switch route ID is exchanged. At the "Netcom layer", the introduction of the access identifier ID, the exchange route identifier ID, and the access identifier resolution mapping theory have the following main functions:

(1) The Netcom layer realizes the unified access of the diversified access network and terminals (such as fixed networks, mobile networks and sensor networks in the Internet, various access networks and terminals in the telecommunication network, etc.) The single access problem of traditional Internet and telecommunication networks has expanded the scope of network services.

(2) Guarantee the privacy and security of users. The access identities of the various access networks represent their identities, while the switched route identities are only used for the core network to exchange routes. After the access identifier and the exchange route identifier are separated, the access identifier representing the user identity does not propagate on the core network, making it impossible for other users to analyze the identity of the user by intercepting the information of the core network, thereby ensuring the privacy of the user; It is possible to intercept their information by the identity of the user and ensure the security of the user information.

(3) Guaranteed controllability and manageability of the network. When various access networks apply for access identification, the network The administrator performs access control and authentication on various access networks according to the subscription information of the user, and the result of the authentication determines whether to accept the user connection request, and at the same time determines the quality of service provided to the user.

Embodiment 2:

This embodiment is a routing device used in an integrated network, which is an architecture and theory, and is described in the form of a virtual device. A brief review, the key supporting theories and technologies of information networks such as telecommunication networks and the Internet are realized and completed through exchange routing theory and technology. On the basis of summarizing and in-depth analysis of traditional information exchange routing theory, it is found that various information networks have different working mechanisms and mechanisms for switching/routing, but essentially complete the exchange and forwarding of various data packets. The difference is that the format of various data packets and the service content of the different services are different, resulting in different resource requirements of various data packets to the network. The new architecture of integrated networks supporting multiple services introduces the concept and mechanism of generalized switched routes, and attempts to use the generalized switched routing theory in integrated networks to solve the problem of exchange routing of data packets carrying different service connotations. At the same time, it solves the problems of mobility, privacy, security and controllability of diversified access networks and terminals.

Under the architecture model of the integrated network, the original design idea of the separation and aggregation mapping theory of access identification and exchange route identification is followed, including global optimization theory and technology such as admission control, scheduling, service shaping, routing, state control, etc. Based on the routing architecture model, a generalized switched routing architecture model is proposed creatively, as shown in Figure 3.

A new network protocol device including terminal mobility, subnet mobility, and dynamically changing network supporting an integrated network; phase separation and aggregation mapping theory based on integrated network-based access identification and exchange route identification Should be equipped; provide users with multi-granular quality of service guarantee network resources and quality of service management devices; various wireless network interfaces and sensor network interfaces. Various wireless network interfaces and sensor network interfaces connect various access networks and terminal devices to the network to provide diversified network and terminal access capabilities; provide users with multi-granular quality of service guarantee network resources and services. The quality management device rationally allocates and schedules network resources to ensure the quality of service of users; the corresponding device based on the integrated network access identifier and the exchange route identifier separation aggregation mapping theory ensures the privacy, security and controllability of the user A new network protocol device that supports terminal mobility, subnet mobility, and dynamically changing networks of an integrated network assigns an access identifier and a routing identifier to the user, so that the data packet is communicated using the access identifier in the virtual access module. In the virtual backbone module, the exchange route identifier is used to perform routing and forwarding of data packets, and the mobile access of the network and the user is supported. The above devices work together to complete the communication process of both parties. In the generalized switched routing architecture model, the corresponding devices based on the integrated network for access identification and exchange route identification separation and aggregation mapping theory and the new terminal movement, subnet mobility and dynamic change network supporting the integrated network are introduced for the first time. The network protocol device enables the data packets of the two communication parties to communicate using the access identifier in the virtual access module, and uses the exchange route identifier in the virtual backbone module to perform routing and forwarding of the data packet, and ensures privacy and security of the user. Controllable manageability, support mobile access for networks and users.

In addition to retaining the original key modules of the traditional switched routing architecture model, the generalized switched routing architecture model introduces terminal mobility that supports integrated networks in order to support the mobility and sensing of integrated networks and users. New network theory and protocol specifications for subnet mobility and dynamically changing networks; In order to support the privacy, security and controllability of integrated networks and users, originality-based access identifiers based on integrated networks are introduced. The corresponding module of the separation and aggregation mapping theory with the exchange route identifier not only provides the privacy, security and controllability of the network and the user, but also supports the mobility; in order to provide users with multiple granularity in the integrated network Service quality assurance, introduced Network resource and service quality management theory, completed reasonable network resource scheduling, and realized network real-time traffic engineering capability; In order to integrate various mobile and sensing networks and terminals, the traditional wired interface is preserved. In addition, a variety of wireless network interfaces and sensor network interfaces have been introduced, providing a variety of network and terminal access capabilities.

Claims

1. A method for constructing an integrated network supporting universal services, characterized by the steps of _: establishing a network layer;

Establishing a service layer on the basis of the Netcom layer;

Various service plugins are installed on the basis of the service layer.

Right

2. The method for constructing an integrated network supporting universal services according to claim 1, wherein in said network layer construction step:

Construct a virtual access module at the Netcom layer;

Constructing a virtual backbone module at the network layer; the book enters an access identifier resolution map between the virtual access module and the virtual backbone module.

3. The method for constructing an integrated network supporting a ubiquitous service according to claim 2, wherein the access identifier resolution mapping is:

5 ^IQ (j )AID zt L L , ( AID

LL AID xQ

4. The method for constructing an integrated network supporting universal services according to claim 3, wherein the communication step in the network layer is:

The virtual backbone module forwards the data packet by using the exchange route identifier instead of the access identifier. The receiving virtual access module receives the data packet with the access identifier.

5. A generalized switching router for an integrated network supporting universal services, comprising: a new network protocol device supporting terminal mobility, subnet mobility, and dynamically changing networks of an integrated network; integrated network based access Corresponding means for identifying and separating the communication mapping theory of the exchange route identifier; providing the user with multi-granularity service quality assurance network resource and service quality management device; various wireless network interfaces and sensor network interfaces.