Abstracts of Magazine FUJITSU 2000-11 (VOL.51, NO.6)

Special Issue : IP Network

• Virtual Private Network (VPN)

The evolution of the Internet, intranets, and extranets will be significantly advanced by the introduction of inexpensive and secure wide-area communication technologies. Therefore, Fujitsu has introduced a group of products that enable Internet VPN （CPE-based VPN）. This group consists of three product lines: the LR-X series, NetShelter, and Safegate/INTERSTAGE Security Director. Internet-related technologies, including VPN, have been standardized by the IETF. Fujitsu products support the IETF standards to guarantee interoperability with other Fujitsu products and non-Fujitsu products. Fujitsu also supports its own proprietary technologies such as Safegate to meet customers’ requirements which cannot be met with IETF standards and has developed various products to satisfy its customers’ needs. This paper gives an overview of VPN and describes Fujitsu’s approach to VPN and the main features of the product group.

• Policy Based Networking

The integration of voice and data into the IP network and the increase of network devices as the network expands have accelerated the complexity of network operation. To solve this problem, Fujitsu has developed a framework for Policy Based Networking （PBN）, which provides central and dynamic network control. This framework includes the architecture and product group for achieving PBN. These products reduce the load on network administrators, avoid inconsistencies in the network configuration, and provide quick responses to network failures （which cannot be provided through manual operation）. This paper describes the objectives and practical method of realizing PBN and specific PBN products and gives an overview of the functions that PBN provides.

• IP Voice Solution Based on e-Volving Telephony Concept

The Fujitsu VoIP system provides the IP Voice Solution for constructing an integrated voice/data IP network for various environments and needs based on the e-Volving Telephony concept and represents a new style of intra-company communication. The new system features comprehensive voice services, high-quality voice communication, and easy application linkage. This paper describes the deployment policy of IP Voice Solution and introduces the system features of core VoIP products, the next-generation PBX i-force, and the next-generation communication server IP MEDIASERVE. This paper also describes the software architectures and design techniques used to achieve the system features.

• VoIP Router: LR-V Series Based on e-Volving Telephony Concept

Fujitsu has proposed the e-Volving Telephony concept as a voice/data integration solution. Based on this concept, Fujitsu has developed the LR-V series of VoIP routers, which fetch voice data over a LAN/WAN. Fujitsu has also developed the NetEyemanager/VoIP gatekeeper software to enable construction of an extension station network over a LAN/WAN. The LR-V series provides a compact set of router functions, voice/data conversion functions, and telephone number/IP address conversion functions. It provides inexpensive and optimum solutions ranging from the connection of a voice/data common line between two points in combination with LR-V to the construction of a voice/data integrated IP network in which multiple VoIP networks are WAN-connected over a LAN combined with LR-X series routers. This paper describes the deployment of the IP Voice Solution and describes our VoIP products and their core technologies.

• High-reliability Gigabit Layer-3 Switch: SR8800

The rapid diffusion of intranets in companies, the integration of information and basic business systems into the IP network, and the evolution of data centers have made the fast and highly reliable Layer-3 switch attractive for use as the core product of the future IP network. In anticipation, Fujitsu has developed a high-reliability gigabit Layer-3 switch, the SR8800. The SR8800 is a key product that is expected to form the nucleus of future intranets and data centers. This product can accommodate up to 48 gigabit Ethernets or up to 128 100M Ethernets and incorporates high-reliability technologies and advanced Quality of Service （QoS） technologies. This paper describes the SR8800’s high-reliability technologies, for example, the duplication of its internal components and its high-performance QoS technology with dedicated hardware for control. This paper also describes the future evolution of the SR8800.

• Traffic Dispatching System: Network AccessDirector

In companywide client-server systems and electronic commerce systems, accesses from many users are concentrated on a single business server, and the resultant increase in business data flowing into the transmission path can cause a sudden deterioration in the performance of business processing. Fujitsu’s Network AccessDirector overcomes this problem by providing a function that distributes the packets that a server requests from a client to multiple servers and band-controls passing packets to prevent a deterioration of server and network performance and to prevent business processes from being suspended at server failures.

• Traffic Measurement Technique: NEPRI

Recently, there have been strong demands for better communication quality in the IP network and dynamic control of load distribution. To answer these demands, precise measurement of network performance has become vital. However, because today’s IP network has been constructed bottom-up by interconnecting various network devices, such measurement is very difficult. This paper describes the increase in measurement load, the deterioration of measurement accuracy, and the problems associated with conventional technologies. Also, this paper introduces a new technique that Fujitsu is developing called “NEPRI.” NEPRI enables efficient measurement by probing the bottleneck bandwidth in the network path. This technique does not calculate the Round Trip Time （RTT）, which is the conventional way, but calculates the available bandwidth of the bottleneck from the correlation between the RTTs of probing packets. This calculation enables the bandwidth to be measured as accurately as with the conventional technique simply by transmitting a small number of packets over a congested network.

• Compact Dial-up Router: NetVehicle Series

Fujitsu has developed the NetVehicle series of compact dial-up routers for the Internet. Dial-up routers have come into common use because of the growth of the Internet. At the same time, user needs have been diversifying and the functions required for business use and home/personal use are different. The NetVehicle series has been separated into business models and consumer models so that the optimum solutions can be provided for each area. This paper introduces a consumer model, NetVehicle-GX5, and a business model, NetVehicle-S20, and explains the concept incorporated in these models that enables easy Internet access. This paper also describes the USB-LAN and modem connection functions featured in these models and some of the proprietary technologies they incorporate, for example, their operating system and multi-routing functions.

• Concept of Carrier IP Network

The recent deregulation of the global telecommunications market and explosive diffusion of the Internet and mobile communications have significantly changed the business environment of telecommunications carriers. To cope with this change, carriers are reforming their network architectures. This paper describes the major requirements of the next-generation carrier network for the future Internet backbone and explains the concept, network configuration, and components of a Fujitsu carrier IP network that meets those requirements. This paper also introduces Fujitsu’s approach to cutting-edge carrier IP technologies in the fields of photonics, IP, and mobile communications which support the carrier IP network and carrier IP products.

• Global IP Network (GIPNet) - Wide-area, Large-capacity Quality Assurance Type Carrier Class IP Network -

Global IP Network （GIPNet） is a Fujitsu Carrier IP Network architecture that is compatible with the NTT Global Megamedia Network （GMN） architecture. It is designed to provide the following in a wide-area, large-capacity network: high-speed IP communication, bandwidth guaranteed communication, multi-grade QoS assurance communication, a network-based IP-VPN service, and a multicast communication service. The entire network functions as a huge virtual router which connects users to each other within a 1-hop separation and operates as a wide-area autonomous system with many internal routing domains. GIPNet provides carrier-type, high-quality services by making use of various IP technologies and connection-oriented technologies for core network transfer mechanisms while maintaining complete Internet connection compatibility. Fujitsu has developed an IP node of GIPNet, which is an IP packet switching system that accommodates subscribers. The IP node, configured as the Edge Node of NTT GMN, is used in the IP-VPN service network of NTT’s business division. This paper describes various features of GIPNet and IP node.

• Photonic Network

A new transport network is required that can handle the recent, large increases in IP traffic. Compared to existing networks, the new network must have a larger capacity, be more economical, and provide a higher quality of service. A network that meets this expectation is the photonic network. In response to this situation, Fujitsu has developed and commercialized the FLASHWAVE series of Wavelength Division Multiplexing （WDM） systems. This paper describes the current state and future evolution of the photonic network and outlines the current trend in WDM systems and the features and performance of FLASHWAVE320G and FLASHWAVE-OADX. This paper also describes the current trend in digital wrapper technology, which will support future IP transmissions.

• High-speed Metallic IP Access System: ADSL

ADSL is an economical and high-speed digital subscriber line transmission system that uses existing two-wired metallic cables. Its asymmetrical transmission capacity is several megabits per second in the downstream link from the central office to the subscriber and several hundred kilobits per second in the upstream link. Because ADSL satisfies the demand for fast Internet access with its high-speed downstream link and its cost-effective use of existing facilities, ADSL systems are being installed at an increasing rate. Fujitsu has developed Japan’s first original ADSL chip set that conforms to ITU-T G.992.2 （G.lite）. Fujitsu has recently used the chip set to commercialize intra-office DSLAM and ADSL-DSU for private residences. DSLAM can accommodate 512 lines, is fully duplicated, and, therefore, has an excellent expandability and reliability. Moreover, an ATM switch is built into the DSLAM to secure good Quality of Service （QoS）. Because the ADSL-DSU has sophisticated IP routing functions and bridge functions, it can work with Information Service Providers （ISPs） that have different protocol stacks.

• IP Network Operation Management

The mission of network operation management is to quickly and inexpensively provide a high-quality operation support environment to cope with challenges such as a diversifying and expanding network. This paper describes Fujitsu’s approach to IP network operation management in terms of Fujitsu’s basic policy, basic structural model, and product series. This paper also describes the positioning, features, and latest development status of two example IP network operation management systems: SystemWalker and FLEXR.

• Design and Operation of IP Network

The IP network, which is now used as the backbone of the information system, combines many technologies and devices, and various technological problems had to be overcome before the component parts could work together harmoniously. Since 1989, to provide an IP network solution, Fujitsu has evaluated and verified new network technologies, including IP, at Fujitsu’s Technical Center, and the results of these activities have been used to develop new products and services （NetCares）. The evaluations and verifications done at the Technical Center include not only checks for basic functions, performance, and interconnectability but also analyses of scalability problems and pathological phenomena. The Technical Center also focuses on network technologies applied to all fields, for example, carriers, service providers, data centers, companies, universities, and laboratories. This paper describes some examples of the evaluations and verifications performed at the Technical Center and describes the NetCares system.

• Computer Systems for Studying Space Debris

In recent years, the debris generated from human activities in space has attracted much attention. Fujitsu, under contract with the National Space Development Agency of Japan （NASDA）, has developed a database system that manages space debris orbit information and simulates and analyzes collisions, reentries, and other events involving space debris. Test operations using this system were started in 1999. Fujitsu is now developing a system for observing space debris from earth and processing the obtained observation data. This paper describes the database system and the new system being developed.