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Workshop on Mobile Computing Systems and Applications

8-9 Dec. 1994

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Displaying Results 1 - 25 of 39
  • Workshop on Mobile Computing Systems and Applications

    Publication Year: 1994
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    Freely Available from IEEE
  • Mobisaic: an information system for a mobile wireless computing environment

    Publication Year: 1994, Page(s):185 - 190
    Cited by:  Papers (7)  |  Patents (60)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (838 KB)

    Mobisaic is a World Wide Web information system designed to serve users in a mobile wireless computing environment. Mobisaic extends the Web by allowing documents to both refer and react to potentially changing contextual information, such as current location in the wireless network. Mobisaic relies on client side processing of HTML documents that support two new concepts: dynamic uniform resource... View full abstract»

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  • Author index

    Publication Year: 1994
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    Freely Available from IEEE
  • On travelling incognito [mobile computing]

    Publication Year: 1994, Page(s):205 - 211
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (572 KB)

    User mobility is rapidly becoming an important and popular feature in today's networks. This is especially evident in wireless/cellular environments. While useful and desirable, user mobility raises a number of important security related issues and concerns. One of them is the issue of tracking mobile user's movements and current whereabouts. Ideally, no entity other than the user himself and a re... View full abstract»

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  • The design of the SEER predictive caching system

    Publication Year: 1994, Page(s):37 - 43
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (580 KB)

    Supporting portable computers in a disconnected environment requires persistent caching of files without user intervention. SEER is a system that uses semantic information to predict which files the user is likely to work on, and arranges to transparently cache them on the portable platform prior to disconnection. We present the overall design of the SEER system and the algorithms used to determin... View full abstract»

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  • Anonymity in a mobile computing environment

    Publication Year: 1994, Page(s):200 - 204
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB)

    In a mobile computing environment, it is desirable to protect information about the movements and activities of mobile entities from onlookers. Solutions to this problem of providing anonymity have to be developed with the constraints of mobile computing environments in mind. It is argued that this issue merits investigation. A brief survey of the nature of anonymity provided in proposed or existi... View full abstract»

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  • Overcoming the network bottleneck in mobile computing

    Publication Year: 1994, Page(s):34 - 36
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (264 KB)

    System designers have traditionally treated the network as an inexhaustible resource, focusing their efforts on optimizing CPU and storage usage. For instance, the popular NFS file system supports diskless operation, thereby avoiding use of local secondary storage at the expense of increased network usage. But in mobile computing, it is the network, rather than CPU or storage, that will be the sca... View full abstract»

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  • A pen-based database interface for mobile computers

    Publication Year: 1994, Page(s):130 - 135
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (444 KB)

    The appearance on the market of pen-based computers with wireless communication capabilities has led to the ability to access geographically distributed information bases. Moreover, such computing devices require database interfaces that are easy-to-use, avoid large-scale data input via keyboard use, and are suited for smaller display screens. We establish the need for newer interfaces to deal wit... View full abstract»

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  • A method providing identity privacy to mobile users during authentication

    Publication Year: 1994, Page(s):196 - 199
    Cited by:  Papers (1)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    The increasing development of mobile networks raises new security requirements and concerns. In addition to the basic need for authentication, confidentiality and key distribution services, a new problem involving privacy is the unauthorized tracking of users' migration. In other words, accessing any information related to the mobile user's location data without his consent, is a serious violation... View full abstract»

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  • Universal mobile addressing in the Internet

    Publication Year: 1994, Page(s):24 - 31
    Cited by:  Patents (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (572 KB)

    To support mobility, we propose to use a triple (M, N, d) as an address for every stationary or mobile computer in a multi-network system, like the Internet. In this (M, N, d) address, M is the network where the computer is currently located, N is the network where the computer is usually located, and d is a unique identifier of the computer in network N. The address of a stationary computer is al... View full abstract»

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  • An architecture to simplify communicating applications

    Publication Year: 1994, Page(s):124 - 129
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB)

    Presents an overview of an architecture to facilitate the creation of communicating applications for hand-held computers. We briefly introduce the overall goals of the project, the application model, and then describe the key features that support communicating application programs. Finally, we walk through the execution of a communicating application to observe the application model in use. This ... View full abstract»

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  • Supporting adaptive services in a heterogeneous mobile environment

    Publication Year: 1994, Page(s):153 - 157
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    Future computer environments will include mobile computers which will either be disconnected, weakly interconnected by low-speed wireless networks such as GSM (global system for mobile communications), or fully interconnected by high-speed networks ranging from Ethernet to ATM (asynchronous transfer mode). While the transition between networks is currently a heavyweight operation, we believe that ... View full abstract»

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  • Dealing with tentative data values in disconnected work groups

    Publication Year: 1994, Page(s):192 - 195
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    The paper describes a problem of weakly consistent replicated data systems used in support of disconnected groups of people. The problem concerns actions and updates derived from tentative data updates that are ultimately determined to be in conflict. While some such actions and updates can be automatically resolved, many require human intervention. Furthermore, although some file and database sys... View full abstract»

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  • A hybrid model for mobile file systems

    Publication Year: 1994, Page(s):20 - 23
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    Existing distributed file systems are based on either a client-server model or a peer-to-peer model. We believe that the dynamic conditions of mobile computing and new classes of devices such as PDAs will no longer permit rigid adherence to either of these models. We argue that a hybrid of the two will have to be used. We then propose a file system design based on such a model which exploits the a... View full abstract»

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  • Teleporting-making applications mobile

    Publication Year: 1994, Page(s):82 - 84
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (252 KB)

    The rapid emergence of mobile computers as a popular, and increasingly powerful, computing tool is presenting new challenges. This subject is already being widely addressed within the computing literature. A complementary and relatively unexplored notion of mobility is one in which application interfaces, rather than the computer on which the applications run, are able to move. The Teleporting Sys... View full abstract»

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  • Experience with connected and disconnected operation of portable notebook computers in distributed systems

    Publication Year: 1994, Page(s):119 - 123
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (424 KB)

    DOC (Disconnected Operation Cache) is a two-level client caching system designed and implemented to support connected and disconnected operation of small form-factor, battery-powered portable computers. This paper describes some design features of DOC, and our experiences with running it in the software engineering environment of AST Research. The uniqueness of the DOC project stems from the fact ... View full abstract»

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  • Improving end-to-end performance of TCP over mobile internetworks

    Publication Year: 1994, Page(s):146 - 152
    Cited by:  Papers (10)  |  Patents (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (604 KB)

    Reliable transport protocols such as TCP use end-to-end flow, congestion and error control mechanisms to provide reliable delivery over an internetwork. However, the end-to-end performance of a TCP connection can suffer significant degradation in the presence of a wireless link. We are exploring alternatives for optimizing end-to-end performance of TCP connections across an internetwork consisting... View full abstract»

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  • A design for file access in a mobile environment

    Publication Year: 1994, Page(s):57 - 62
    Cited by:  Papers (3)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    Reducing communication cost is important in a mobile environment, because transmission of data over the radio link is slow, expensive, and unreliable. Providing data consistency is crucial because many mobile applications are database applications which rely on consistent data. We propose a design for a file access mechanism specific to a mobile environment. Our two main design goals are to reduce... View full abstract»

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  • Are “disks in the air” just pie in the sky?

    Publication Year: 1994, Page(s):12 - 19
    Cited by:  Papers (15)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (700 KB)

    Mobile computers and wireless networks are emerging technologies which will soon make ubiquitous computing a reality. In the wireless environment, mobile clients may often be disconnected from stationary server machines or may have only a low-bandwidth channel for sending messages to servers. This environment raises new challenges for the support of database applications for three reasons: (1) the... View full abstract»

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  • A group communication approach for mobile computing

    Publication Year: 1994, Page(s):95 - 102
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (796 KB)

    Describes the design and implementation of a set of tools, called MobileChannel, for use with the Isis system. A simple scheme to support user mobility-switching a control point between replicated servers-provides a uniform mechanism to handle both client migrations and server failures. The hands-off mechanism is simplified by integrating a FIFO channel implementation into the server replication m... View full abstract»

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  • Using ATM for a campus-scale wireless Internet

    Publication Year: 1994, Page(s):75 - 79
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    The paper reviews the problem of routing in a wireless Internet, and discusses a plan that combines wireless network technology with high speed Asynchronous Transfer Mode (ATM) switching technology. The combination provides a wireless communication system with sufficient aggregate bandwidth to handle both data transfers and routing updates for a university sized network. More importantly, the pape... View full abstract»

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  • Transparent resource discovery for mobile computers

    Publication Year: 1994, Page(s):116 - 118
    Cited by:  Papers (2)  |  Patents (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB)

    As mobile computers move from one place to another, their “physical” points of attachment to the network change from time to time. Host movement causes service disruption. The Mobile-IP protocol attempts to solve this problem by hiding the effect of change in network service access points from the transport and higher layers. Thus, Mobile-IP ensures that a mobile host remains “vi... View full abstract»

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  • Asynchronous video coding for wireless transport

    Publication Year: 1994, Page(s):138 - 145
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (740 KB)

    Wireless access to continuous-media services is becoming increasingly prevalent. An interactive video service is one such service, but existing compression standards are unsatisfactory for wireless packet-video services. We propose a novel strategy for video transport using a layered source coder in conjunction with a variable quality-of-service, multiple-substream abstraction for the transport. T... View full abstract»

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  • Dynamic documents: mobile wireless access to the WWW

    Publication Year: 1994, Page(s):179 - 184
    Cited by:  Patents (48)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (672 KB)

    We propose dynamic documents as an approach to extending and customizing the WWW/Mosaic for mobile computing platforms. Dynamic documents are programs executed on a mobile platform to generate a document; they are implemented as Tcl scripts. We have modified the NCSA Mosaic web client to run the dynamic documents it retrieves through a modified Tcl interpreter. The interpreter is designed to execu... View full abstract»

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  • Disconnected operation in the Thor object-oriented database system

    Publication Year: 1994, Page(s):51 - 56
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (552 KB)

    The paper discusses issues raised by providing disconnected operation in the Thor object-oriented database system. Disconnected operation in such a system poses new challenges because of the small size of objects, the richness and complexity of their interconnections, the huge number of them, and the fact that they are accessed within atomic transactions. We propose three techniques to address the... View full abstract»

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