Showing papers on "Wireless WAN published in 1990"

Network address management for a wired network supporting wireless communication to a plurality of mobile users

Abstract: Apparatus and method for managing bidirectional transmission of information between a wired network and at least one mobile communication unit (10) in wireless communication with the wired network. The wired network is of the type wherein users of the network are each assigned a unique network address such as in, for example, a TCP/IP network. In accordance with the invention there is provided a local gateway (16) coupled between a wireless LAN and the wired network for communication with a mobile communication unit. There is also provided a global gateway (18) coupled to the local gateway and to remote users of the network. The global gateway functions to maintain a plurality of network addresses and, in response to a request for an assignment of a network address from the mobile communication unit, assigns one of the plurality of network addresses to the requesting mobile communication unit. The global gateway also buffers and routes data received from a remote user, the data being directed to an addresss corresponding to the assigned network address, to the mobile communication unit having the assigned address.

Radio communication network for remote data generating stations

Abstract: A wide area communications network communicating data from a plurality of network service modules through a plurality of remote cell nodes and intermediate data terminals to a central data terminal. The wide area communications network collects network data generated by a plurality of physical devices such as gas, water or electricity meters, located within a geographical area. The wide area communications network is a layered network having a hierarchical communications topology. The central data terminal controls network operation. Intelligence exists at all layers of the network, thereby easing the workload of the central data terminal. The intelligence attributed to each module is a function of the application of that module.

Star-type local area network access control

Abstract: The multiple access fashion is a new resolution for the star-type local area network (LAN) access control and star-type optical fibre LAN. Arguments about this network are discussed, and the results are introduced.

The DARPA wideband network protocol

Abstract: This paper discusses the Dual Bus Protocol (DBP) developed for the Terrestrial Wideband Network (TWBNET), a high-speed trans-continental network that supports distributed real-time applications and protocol research. DBP is a descendant of the QPSX protocol proposed as the IEEE 802.6 Metropolitan Area Network (MAN) standard, with enhancements to create a protocol suitable for a wide area network and to provide network services such as reserved bandwidth. In addition, the protocol was designed to be scalable for use in networks that are larger and faster than the TWBNET. This paper describes the DBP and its network environment and provides an analysis of the performance of the protocol based on both simulations and TWBNET measurements.

Customer network management: a service provider's view

Abstract: Experience in providing network management for the 1986 Pan American (Pan Am) Games in Indianapolis USA are described. The situation called for an integrated solution that could manage the 5000 voice, data, and video circuits residing within several different networks providing communications for 6500 data terminals and 143 computers spanning 40 locations. The scope of network management is examined, separating it into two parts: management of the specific local exchange carrier services and integrating that with the management of all other products and services. The driving forces behind the need for customer network control are discussed. A two-stage approach to achieving that control is presented. >

Voice, data and video integrated broadband metropolitan area network

Abstract: This paper discusses the technical feasibility of the multimedia metropolitan area network based on the tree-shaped broadband network, employing two-way CATV technology. In the proposed network, all information can flow on any transmission line through the headend. This leads to the following features, which cannot be realized in the star network as in the telephone network: 1 Flexible services are provided. 2 An efficient information communication service can easily be realized. 3 It is easy to provide the highspeed broadband service at a low cost. 4 The security of the network can be improved. The following systems were developed by the authors as examples of the information communication services utilizing those features: TDMA circuit switching service using “time-slotted bus with control window,” CSMA/CD packet switching service using “beat signal level detection,” and TDMA video switching service, where several video signals are multiplexed as analog signals. Those services can be provided to more than 10,000 subscribers in a service area of diameter 20 km or more. The system is expected to provide the basis for the information communication in local communities, together with the widespread use of urban-type CATV.

Design of LAN/WAN relay systems in the European context

Abstract: The problem of local-area-network/wide-area-network (LAN/WAN) interworking, where the WAN part is supported by an X.25 packet switched data network, is addressed. In this situation, a solution consists of extending the support of the connection-oriented characteristics to the LAN part of the communication. This can be achieved by implementing the X.25 level-3 protocol on the LAN stations. Interconnection between LAN and WAN can be realized by gateways supporting the X.25/PLP on both sides. The structure of such a gateway is discussed, focusing on the protocol, relaying, and routing aspects. It is required that this solution guarantee a negligible rate of generated resets and disconnects to allow for the operation of the transport protocol classes 0 or 2. >

The future of customer control

Abstract: The state of the art in the various segments of the customer control network management business is surveyed, and projections of the future of each of these segments are presented. Among the anticipated developments discussed are the use of expert-system-based technologies to automate the alarm correlation function, convergence on five principal data network standards, the use of automated tools to reconfigure remote PBX installations, the correlation of physical and logical network management, and the emergence of new segments of the network management marketplace. Customer requirement and problems that are shaping future network management solutions are examined. >

Real time networking of control systems

Abstract: Applications and implementation considerations when working with real-time local area networks with bandwidths of 1 Mb/s and above are discussed. The following networking issues are discussed: industrial peer-to-peer networks, applications, network characteristics, network performance, network components, designing networks, installing networks, software programming network, and host computer connectivity. >

Packet communication technology for advanced wireless networks

Abstract: Two techniques for future (third-generation) wireless networks are described They are a switching architecture, referred to as a cellular packet switch, and a packet transmission technique, referred to as packet-reservation multiple access It is shown how the two can work together to meet the demands of third-generation wireless networking As a network design example, a dual-bus metropolitan area network to be standardized as IEEE 8026 is considered >