Workshop on Mobile Computing Systems and Applications

8-9 Dec. 1994

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  • 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 (8)  |  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
  • Detecting mutual consistency of shared objects

    Publication Year: 1994, Page(s):44 - 50
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (664 KB)

    In systems that support disconnected operations, shared objects must be cached at client sites to ensure that the objects are accessible while the client is disconnected. It is desirable that objects cached at a client site are mutually consistent with respect to the level of consistency provided by the system. We present a new technique for detecting mutual consistency of objects and show how it ... 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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  • 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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  • 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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  • 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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  • W4-the Wireless World Wide Web

    Publication Year: 1994, Page(s):176 - 178
    Cited by:  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (264 KB)

    A number of people see personal digital assistants, PDAs, with wireless communication as the next big thing in the computer industry. However, the current PDA's obvious limitations in computational power, storage, communication bandwidth, and display size pose the questions: can you build anything, and if so, would anyone want to use it? In order to put these dreams in perspective, we decided to b... 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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  • 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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  • 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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  • Universal mobile addressing in the Internet

    Publication Year: 1994, Page(s):24 - 31
    Cited by:  Patents (18)
    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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  • Causally ordered message delivery in mobile systems

    Publication Year: 1994, Page(s):169 - 174
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (468 KB)

    There is a growing trend in using mobile computing environments for several applications, and it is important that such mobile systems are provided with adequate support both at the systems level and at the communication level. Causal ordering is a useful property, particularly in applications that involve human interactions. We present three algorithms for causal ordering in mobile systems. The f... View full abstract»

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  • An indoor wireless system for personalized shopping assistance

    Publication Year: 1994, Page(s):69 - 74
    Cited by:  Papers (1)  |  Patents (35)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    By integrating wireless, video, speech and real-time data access technologies, a unique shopping assistant service can be created that personalizes the attention provided to a customer based on individual needs, without limiting his movement, or causing distractions for others in the shopping center. We have developed this idea into a service based on two products: a very high volume hand-held wir... 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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  • Replication strategies for mobile e-mail

    Publication Year: 1994, Page(s):111 - 115
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (332 KB)

    Mobile computer users may have multiple computers and various communication methods available to them. Thus, effective electronic mail services in diverse mobile environments, including both wireless and wireline scenarios, can be significantly enhanced using replication services. In this paper, we discuss our adaptations of R.A. Golding's (1992) weak-consistency group communication and membership... 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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  • Revising transaction concepts for mobile computing

    Publication Year: 1994, Page(s):164 - 168
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    It is expected that in the near future millions of users will have access to on-line distributed databases through mobile computers. The restrictions imposed by the nature of the wireless medium and the resulting mobility of data consumers and data producers make traditional transaction models inadequate. In this paper, we investigate means for providing transaction support appropriate for mobile ... View full abstract»

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  • Changing communication environments in MosquitoNet

    Publication Year: 1994, Page(s):64 - 68
    Cited by:  Patents (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (508 KB)

    MosquitoNet is a new project at Stanford University for investigating operating system and application issues in mobile and wireless computing. Our initial goals focus on providing the appearance of continuous network connectivity for mobile hosts. To achieve these goals we must first enable portable computers to move seamlessly from one communications medium to another, for example from an Ethern... 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 client-side-only approach to disconnected file access

    Publication Year: 1994, Page(s):104 - 110
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (660 KB)

    Discusses a client-side-only approach to providing disconnected access to a heterogeneous set of network file services. Our method contrasts with those used in systems such as Coda, primarily because Coda depends upon changes to both the client software and the server software. Instead, we assume that we cannot make changes to the servers, and we explore the resultant benefits and limitations, as ... View full abstract»

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  • Workshop on Mobile Computing Systems and Applications December 1994

    Publication Year: 1994
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (820 KB)

    First Page of the Article
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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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  • 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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