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IEEE Transactions on Mobile Computing

Issue 5 • May 2009

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Displaying Results 1 - 14 of 14
  • [Front cover]

    Publication Year: 2009, Page(s): c1
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  • [Inside front cover]

    Publication Year: 2009, Page(s): c2
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  • Effects of Location Awareness on Concurrent Transmissions for Cognitive Ad Hoc Networks Overlaying Infrastructure-Based Systems

    Publication Year: 2009, Page(s):577 - 589
    Cited by:  Papers (34)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2619 KB) | HTML iconHTML

    Through wide-band spectrum sensing, cognitive radio (CR) can identify the opportunity of reusing the frequency spectrum of other wireless systems. However, wide-band spectrum sensing requires energy consumption processes. In this paper, we aim to relieve the burden of spectrum scanning in a CR system by means of location awareness. We investigate to what extent a CR system with location awareness ... View full abstract»

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  • Topology Management in Directional Antenna-Equipped Ad Hoc Networks

    Publication Year: 2009, Page(s):590 - 605
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2820 KB) | HTML iconHTML

    With fully directional communications, nodes must track the positions of their neighbors so that communication with these neighbors is feasible when needed. Tracking process introduces an overhead, which increases with the number of discovered neighbors. The overhead can be reduced if nodes maintain only a subset of their neighbors; however, this may increase the length of paths between node pairs... View full abstract»

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  • Social Network Analysis for Information Flow in Disconnected Delay-Tolerant MANETs

    Publication Year: 2009, Page(s):606 - 621
    Cited by:  Papers (165)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3293 KB) | HTML iconHTML

    Message delivery in sparse mobile ad hoc networks (MANETs) is difficult due to the fact that the network graph is rarely (if ever) connected. A key challenge is to find a route that can provide good delivery performance and low end-to-end delay in a disconnected network graph where nodes may move freely. We cast this challenge as an information flow problem in a social network. This paper presents... View full abstract»

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  • Energy-Efficient Map Interpolation for Sensor Fields Using Kriging

    Publication Year: 2009, Page(s):622 - 635
    Cited by:  Papers (15)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2024 KB) | HTML iconHTML

    We propose a spatial autocorrelation aware, energy efficient, and error bounded framework for interpolating maps from sensor fields. Specifically, we propose an iterative reporting framework that utilizes spatial interpolation models to reduce communication costs and enforce error control. The framework employs a simple and low overhead in-network coordination among sensors for selecting reporting... View full abstract»

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  • Wardrop Routing in Wireless Networks

    Publication Year: 2009, Page(s):636 - 652
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3108 KB) | HTML iconHTML

    Routing protocols for multihop wireless networks have traditionally used shortest path routing to obtain paths to destinations and do not consider traffic load or delay as an explicit factor in the choice of routes. We focus on static mesh networks and formally establish that if the number of sources is not too large, then it is possible to construct a perfect flow-avoiding routing, which can boos... View full abstract»

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  • Link Estimation and Routing in Sensor Network Backbones: Beacon-Based or Data-Driven?

    Publication Year: 2009, Page(s):653 - 667
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1769 KB) | HTML iconHTML

    In the context of IEEE 802.11b network testbeds, we examine the differences between unicast and broadcast link properties, and we show the inherent difficulties in precisely estimating unicast link properties via those of broadcast beacons even if we make the length and transmission rate of beacons be the same as those of data packets. To circumvent the difficulties in link estimation, we propose ... View full abstract»

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  • Energy-Efficient SINR-Based Routing for Multihop Wireless Networks

    Publication Year: 2009, Page(s):668 - 681
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1887 KB) | HTML iconHTML

    In this paper, we develop an energy-efficient routing scheme that takes into account the interference created by existing flows in the network. The routing scheme chooses a route such that the network expends the minimum energy satisfying with the minimum constraints of flows. Unlike previous works, we explicitly study the impact of routing a new flow on the energy consumption of the network. Unde... View full abstract»

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  • Analysis of Cross-Layer Interaction in Multirate 802.11 WLANs

    Publication Year: 2009, Page(s):682 - 693
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2349 KB) | HTML iconHTML

    Recent works in empirical 802.11 wireless LAN performance evaluation have shown that cross-layer interactions in WLANs can be subtle, sometimes leading to unexpected results. Two such instances are: (i) significant throughput degradation resulting from automatic rate fallback (ARF) having difficulty distinguishing collision from channel noise, and (ii) scalable TCP over DCF performance that is abl... View full abstract»

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  • On Channel Allocation for Heterogeneous Data Broadcasting

    Publication Year: 2009, Page(s):694 - 708
    Cited by:  Papers (5)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3995 KB) | HTML iconHTML

    We explore in this paper the problem of generating broadcast programs in a heterogeneous data broadcasting environment, in which disseminated data items can be of different sizes. Given the broadcast database and the number of channels, we first derive the analytical model of the heterogeneous data broadcasting to obtain the average waiting time of mobile users, and prove the allocation problem as... View full abstract»

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  • An Integrated Approach to Sensor Role Selection

    Publication Year: 2009, Page(s):709 - 720
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2608 KB) | HTML iconHTML

    Many sensor network applications require consistent coverage of the region in which they are deployed over the course of the network lifetime. However, because sensor networks may be deployed randomly, node distribution and data redundancy in some regions of the network may be lower than in others. The sensors in the sparsest regions should be considered more critical to the sensor network applica... View full abstract»

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  • TMC Information for authors

    Publication Year: 2009, Page(s): c3
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  • [Back cover]

    Publication Year: 2009, Page(s): c4
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Aims & Scope

Mobile Computing, as proposed in this Transactions, focuses on the key technical issues related to (a) architectures, (b) support services, (c) algorithm/protocol design and analysis, (d) mobile environments, (e) mobile communication systems, (f) applications, and (g) emerging technologies.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Prasant Mohapatra
Interim Vice-Provost and CIO
Professor, Dept. Computer Science
University of California, Davis, USA
pmohapatra@ucdavis.edu