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UNWIRED E-Med: The next generation of wireless and internet telemedicine systems

IEEE TRANSACTIONS ON INFORMATION TECHNOLOGY IN BIOMEDICINE 2000年第3期4卷 189-193页

作者： Laxminarayan, S Istepanian, RSH New Jersey Inst Technol Vocal Tec Guttenberg Informat Technol Ctr Newark NJ 07102 USA Brunel Univ Dept Elect & Comp Engn Commun & MultiMedia Signal Proc Grp Uxbridge UB8 3PH Middx England

The movement of telemedicine to wireless and mobile Internet applications is imminent in the next few years, This migration from desktop platforms to wireless and mobile configurations will have a significant impact on future healthcare delivery systems and their globalization. Recent telecommunications and biomedical computing advances will significantly enhance the current methodologies of telemedicine and telecare systems. This editorial will present some of the evolutionary issues and important aspects that have to be considered in developing technologies for the next generation of Internet and third generation of mobile systems geared for future telemedical applications. These will provide new dimensions to existing medical services and areas of outreach that are not possible with the current generation that will have tremendous impact on how healthcare delivery will be shaped for the 21st century.

关键词： Mobile communication Telemedicine Wireless communication Biomedical imaging Internet Next generation networking Medical services

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On proxy agents, mobility, and web access

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MOBILE NETWORKS & APPLICATIONS 2000年第4期5卷 233-241页

作者： Joshi, A Univ Maryland Baltimore Cty Dept Comp Sci & Elect Engn Baltimore MD 21250 USA

With the emerging need for ubiquitous access to information, web access from mobile clients is gaining increasing importance. Unfortunately the underlying protocols of the web are not designed to support operations from a resource poor platform in a low bandwidth, disconnection prone environment. Efforts to create systems to support mobile browsing have typically been proxy-based. However, such solutions have recently been criticized due to their non-scalability. Developments in ad hoc networking also threaten the viability of proxy-based approaches. In this paper, we critically examine the proxy-based approach and its place in mobile access to the web in particular, and networked multimedia information in general. We argue far a hybrid approach that uses both proxy-based and end-end techniques as appropriate, suggest when each is more appropriate, and-present a preliminary implementation.

关键词： Mobile computing

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Lessons learned from the design of a mobile multimedia system in the moby dick project 2nd

Lessons learned from the design of a mobile multimedia syste...

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2nd International Symposium on Handheld and Ubiquitous computing, HUC 2000

作者： Smit, Gerard J. M. Havinga, Paul J. M. University of Twente Department of Computer Science Enschede Netherlands

ISBN: (纸本)3540410937

Recent advances in wireless networking technology and the exponential development of semiconductor technology have engendered a new paradigm of computing, called personal mobile computing. This offers a vision of the future with a much richer and more exciting set of architecture research challenges than extrapolations of the current desktop architectures. In particular, these devices will have limited battery resources, will handle diverse data types, and will operate in environments that are insecure, dynamic and which vary significantly in time and location. The research performed in the MOBY DICK project is about designing such a mobile multimedia system. This paper discusses the approach made in the MOBY DICK project to solve some of these problems, discusses its contributions, and accesses what was learned from the project. © Springer-Verlag Berlin Heidelberg 2000.

关键词： Semiconductor device manufacture

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TeleMIP: Telecommunications-enhanced mobile IP architecture for fast intradomain mobility

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IEEE PERSONAL COMMUNICATIONS 2000年第4期7卷 50-58页

作者： Das, S Misra, A Agrawal, P Das, SK Telcordia Technol Comp Networking Res Dept Morristown NJ USA Univ Texas Ctr Res Wireless Mobil & Networking Arlington TX 76019 USA Telcordia Technol Wireless OSS Dept Morristown NJ USA Telcordia Technol Internet Architecture Res Lab Morristown NJ USA

This article first surveys existing protocols for supporting IP mobility and then proposes an extension to the Mobile IP architecture, called TeleMIP. Our architecture attempts to achieve smaller handoff latency by localizing the scope of most location update messages within an administrative domain or a geographical region. TeleMIP is intended for use in evolving third-generation wireless networks, and introduces a new logical entity, called the mobility agent, which provides a mobile node with a stable point of attachment in a foreign network. While the MA is functionally similar to conventional foreign agents, it is located at a higher level in the network hierarchy than the subnet-specific FAs. Location updates for intradomain mobility are localized only up to the MA;transmission of global location updates are necessary only when the mobile changes administrative domains and/or geographical regions. By permitting the use of private or locally scoped addresses for handling intradomain mobility, TeleMIP allows efficient use of public address space. Also, by reducing the frequency of global update messages, our architecture overcomes several drawbacks of existing protocols, such as large Latencies in location updates, higher likelihood of loss of binding update messages, and loss of inflight packets, and thus provides better mobility support far real-time services and applications. The dynamic creation of mobility agents (in TeleMIP) permits the use of load balancing schemes for the efficient management of network resources.

关键词： Ground penetrating radar GSM Mobile computing multimedia systems Multiaccess communication Cellular networks Internet Mobile communication Computer networks Portable computers

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QoS in next generation Internet 4

QoS in next generation Internet

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4th International Conference/Exhibition on High Performance computing in the Asia-Pacific Region, HPC-Asia 2000

作者： Wan, D.C. National Center for Highperformance Computing Taiwan

ISBN: (纸本)0769505902

The recent popularity in the use of multimedia software and applications is creating increasing demand on the Internet to support quality of service (QoS). The problems of most concern in the next-generation Internet (NGI), such as bandwidth and latency, have solutions via DWDM (dense wavelength division multiplexing), high-speed switches/routers, etc. QoS seems to be one of the few aspects remaining without having a clear final standard specified so far, due to its complexity and interoperability issues. This paper introduces QoS and clarifies its status and the latest possible solutions, such as MPLS (Multiple Protocol Label Switching), RSVP (Resource Reservation Protocol), DiffServ (Differentiated Service), etc., for practical implementations of optical networking in NGI with better QoS features. © 2000 IEEE.

关键词： Quality of service

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Taxonomy of network transcoding

Taxonomy of network transcoding

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multimedia computing and networking 2000

作者： Henderson, Rod C. Topol, Brad Li, Chung-Sheng Mohan, Rakesh Smith, John R. IBM Network Computing Software Div United States

Universal access to the WWW is the vision in which all information, from any source, can be accessed anywhere, by any devices, in a consistent and straightforward way. However, the existing web paradigm in which the web server defines the content delivered to the Internet client device has hindered content accessibility for pervasive and ubiquitous devices. When delivering information over the Internet to pervasive and ubiquitous devices, content providers face the considerable challenge of sending and presenting content in a way that makes it usable to resource-limited devices. Transcoding is instrumental to enabling universal access to the web for pervasive and ubiquitous computing devices. In this paper, we propose a taxonomy of transcoding techniques. The main contributions of the proposed taxonomy are i) to provide a road map of the work accomplished to date by presenting dimensions of characteristics derived from our study of transcoding models and techniques, and ii) to help identify unsolved problems that exist in the domain today. Based on the proposed taxonomy, we have analyzed several existing commercially available systems, and investigated possible future improvements on these technologies.

关键词： World Wide Web

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Dynamically transcoding data quality for faster web access 8th

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8th International Conference on High Performance computing and networking, HPCNEurope 2000

作者： Chi, Chi-Hung Li, Xiang Lim, Andrew School of Computing National University of Singapore Singapore119260 Singapore

ISBN: (纸本)9783540675532

To survive in the "world-wide-wait" Internet environment, web surfers are often forced to tradeoff Web object quality for bandwidth by turning off the graphics or Java related objects through the browser configuration. Alternatively, the Web site owner might provide a lower bandwidth version of the Web pages statically. These solutions are not satisfactory because they can not make the best use of the available network bandwidth. To balance between the quality and the bandwidth, we propose a novel layered data model for Web multimedia data. Together with dynamic bandwidth negotiation and a best-fit mechanism, client can get the most appropriate version of a Web request. To make all these transparent to the clients, the layered data model and its associated best-fit mechanism will be implemented in the proxy server. This result is especially important to mobile devices for its limited bandwidth. © Springer-Verlag Berlin Heidelberg 2000.

关键词： Websites

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Natural communication with information systems

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PROCEEDINGS OF THE IEEE 2000年第8期88卷 1354-1366页

作者： Marsic, I Medl, A Flanagan, J Rutgers State Univ Piscataway NJ 08854 USA

Pervasive networking and sophisticated computing open opportunities for collaborative information processing independent of time and space. In this instance the information system becomes on enhancer of human intellect, as well as a mediator for communication among participants. The human user favors the sensory dimensions of sight, sound, and touch as primary channels of communication. Machines that can accommodate these modes promise flexibilities and functionalities that transcend the traditional mouse and keyboard. This paper describes research to establish human-computer interfaces that capture attributes of natural face-to-face communication. An experimental multimodal system is developed to study several aspects of natural style human-computer communication. While as yet primitive, the technologies of image and gaze processing hands-free conversation, and force feedback tactile transduction are combined and used simultaneously for manipulating objects in a shared workspace. Software agent fuse the sensory, signals to estimate and interpret user intent. Current areas of experimental application include disaster relief/crisis management. telemedicine/rehabilitation, and mobile office/wearable computers.

关键词： collaborative work multimedia communication multimodal interfaces natural language interfaces sensory fusion user interface human factors user interfaces

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Distributed service management using mobile components: Architectures, multimedia services and agent technologies

Distributed service management using mobile components: Arch...

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作者： Yucel, Sakir University of Delaware

学位级别：Ph.D.

Creation and management of value added services on top of the basic network services is inherently challenging due to: (1) diverse networking and computing platforms onto which different service characteristics must be mapped and realized, (2) diverse policies for services and management, (3) distributed environments across variety of domains, (4) real-time changes on the network conditions that affect the service. This thesis studies the service and network management requirements of value-added services and proposes a new component-based architecture, utilizing distributed object and agent technologies in order to address these requirements. The architecture consists of management systems, network elements, end systems, agent servers, event collection and correlation servers, and security servers, all connected through a common middleware platform. Generic models for these architectural components have been developed and utilized in order to derive specific agents and components, including detailed views of QoS, connection, security and mobile agent services and interfaces, as well as their management. QoS-driven service provisioning has been demonstrated, using stationary and mobile agents, by working on a unified information model and on standard SNMP MM objects to satisfy the QoS requirements of user applications. Using the existing object-oriented methodologies such as the UML and Fusion, an enhanced development methodology has been proposed to accommodate the proposed component-based architecture. In order to study the feasibility of the proposed architecture, a prototype, that creates and tests mobile service components and their servers, has been implemented.

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A multi-constrained distributed QoS routing algorithm

A multi-constrained distributed QoS routing algorithm

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2000 IEEE International Conference on Networks: networking Trends and Challenges in the New Millennium, ICON 2000

作者： Song, Jun Pung, Hung Keng Jacob, Lillykutty Department of Computer Science School of Computing National University of Singapore Singapore

ISBN: (纸本)0769507778

Multi-criteria QoS routing has been regarded by researchers as a vital mechanism to support multimedia communications. Unfortunately, finding a qualified path meeting the multiple criteria is indeed a very difficult problem to solve. Multi-path-constrained routing problems are considered to be NP complete, and most existing QoS routing algorithms are based on maintaining global network state at every node. This paper proposes a multi-constrained flooding-based QoS routing with minimum computation and implementation complexity which relies on local link-state information only. It takes the least delay to establish a QoS connection which meets all QoS requirements and addresses the 'over-reservation' problem of the flooding-based QoS routing in an elegant and efficient manner. We study the performance of the proposed algorithm, in terms of blocking probability, routing overhead, and connection set-up time, through simulation. © 2000 IEEE.

关键词： Blocking probability

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