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Wireless Communications, IEEE

Issue 1 • Date February 2009

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Displaying Results 1 - 12 of 12
  • Front cover - IEEE Wireless Communications

    Publication Year: 2009 , Page(s): c1
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    Freely Available from IEEE
  • Table of contents

    Publication Year: 2009 , Page(s): 1
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    Freely Available from IEEE
  • Robotic multihop networking - [Message from the Editor-in-Chief]

    Publication Year: 2009 , Page(s): 2 - 3
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  • Wireless communications in networked robotics [Guest editorial]

    Publication Year: 2009 , Page(s): 4 - 5
    Cited by:  Papers (1)
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  • A networking framework for teleoperation in safety, security, and rescue robotics

    Publication Year: 2009 , Page(s): 6 - 13
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1232 KB) |  | HTML iconHTML  

    Safety, security, and rescue robotics is an important application field that can be viewed as a prototypical example of a domain where networked mobile robots are used for the exploration of unstructured environments that are inaccessible to or dangerous for humans. Teleoperation, based on wireless networks, is much more complex than what one might expect at first glance because it goes well beyond mere mappings of low-level user inputs - like joystick commands - to motor activations on a robot. Teleoperation for SSRR must move up to the behavior and mission levels where a single operator triggers short-time, autonomous behaviors, respectively, and supervises a whole team of autonomously operating robots. Consequently, a significant amount of heterogeneous data - video, maps, goal points, victim data, and so on - must be transmitted between robots and mission control. In this article, a networking framework for teleoperation in SSRR is presented. It was evaluated in a series of field tests and competitions, including the European Land Robot Trials and RoboCup events. View full abstract»

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  • Wireless control of a multihop mobile robot squad

    Publication Year: 2009 , Page(s): 14 - 20
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (115 KB) |  | HTML iconHTML  

    Wireless controls offer attractive features including flexibility, self-organization, and dynamic networking, especially in mobile control scenarios. At the same time, wireless controls pose new design challenges because network and control performance affect each other. We focus our study on a wireless, mobile, multihop, robot-control scenario and compare the applicability of standard routing protocols and two network-aware control methods in realistic simulations. The scenario is demanding - with high mobility causing link breaks - and stresses the routing and control algorithms. The system is modeled and evaluated on a platform for integrated control and communication co-simulator. The performance of the algorithms is evaluated not only at the network layer, but also from the application viewpoint, in this case the mobile robot-control system. View full abstract»

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  • Using mobile robots to harvest data from sensor fields

    Publication Year: 2009 , Page(s): 22 - 28
    Cited by:  Papers (31)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (315 KB) |  | HTML iconHTML  

    We explore synergies among mobile robots and wireless sensor networks in environmental monitoring through a system in which robotic data mules collect measurements gathered by sensing nodes. A proof-of-concept implementation demonstrates that this approach significantly increases the lifetime of the system by conserving energy that the sensing nodes otherwise would use for communication. View full abstract»

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  • Using robot mobility to exploit multipath fading

    Publication Year: 2009 , Page(s): 30 - 37
    Cited by:  Papers (10)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (312 KB) |  | HTML iconHTML  

    Communication-aware motion control allows mobile networked robots to increase the average communication throughput. We exploit that in a multipath fading channel, robots can measure the SNR and adapt their motion to spend slightly more time at positions where the channel is good. Two new such cross-layer strategies are analyzed and evaluated: periodic stopping, where the stop duration is a function of the SNR, and controlled stopping, where the robot stops when the communication buffer is filling up. It is shown that the expected average channel capacity can be twice as high as when no cross-layer information is utilized. Experimental evaluation of the strategies confirms the theoretical results. View full abstract»

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  • RF-mobility gain: concept, measurement campaign, and exploitation

    Publication Year: 2009 , Page(s): 38 - 44
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (683 KB) |  | HTML iconHTML  

    Self-directed movement of radio devices can enable large amounts of power gain since the sources of fluctuations in received signal power due to multipath-induced small-scale fading have highly localized effects. We call the gain achieved by finding a better location the mobility gain. Experimental data for indoor as well as outdoor measurement studies are used to illustrate the potential of this RF-Mobility Gain concept over a wide range of frequencies. An analysis of the RF data reveals that a small amount of energy spent on searching for a better location can pay large dividends in long-term power expenditures for RF transmission. Challenges in building such a system for peer-to-peer links and network applications are discussed along with potential coordination algorithms. View full abstract»

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  • Cognitive radio for next-generation wireless networks: an approach to opportunistic channel selection in ieee 802.11-based wireless mesh

    Publication Year: 2009
    Cited by:  Papers (12)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (172 KB) |  | HTML iconHTML  

    'Cognitive radio' has emerged as a new design paradigm for next-generation wireless networks that aims to increase utilization of the scarce radio spectrum (both licensed and unlicensed). Learning and adaptation are two significant features of a cognitive radio transceiver. Intelligent algorithms are used to learn the surrounding environment, and the knowledge thus obtained is utilized by the transceiver to choose the frequency band (i.e., channel) of transmission as well as transmission parameters to achieve the best performance. In this article we first provide an overview of the different components to achieve adaptability in a cognitive radio transceiver and discuss the related approaches. A survey of the cognitive radio techniques used in the different wireless systems is then presented. To this end, a dynamic opportunistic channel selection scheme based on the cognitive radio concept is presented for an IEEE 802.11-based wireless mesh network. View full abstract»

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  • Certificate status validation in mobile ad hoc networks

    Publication Year: 2009 , Page(s): 55 - 62
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (142 KB) |  | HTML iconHTML  

    Certificate validation is much more complex in mobile ad hoc networks than in conventional networks because online access to trusted authorities is not always guaranteed. For this reason, we require new solutions to overcome both the lack of infrastructure and the limited capabilities of several user devices. In this article we study the application of different mechanisms for certificate validation in MANETs and present a cooperative mechanism for certificate validation suitable for MANETs. View full abstract»

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  • 2008 index IEEE wireless communications Vol. 16

    Publication Year: 2009 , Page(s): i - x
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (120 KB)  

    This index covers all technical items¿papers, correspondence, reviews, etc. ¿ that appeared in this periodical during 2008, and items from previous years that were commented upon or corrected in 2008. Departments and other items may also be covered if they have been judged to have archival value. The Author Index contains the primary entry for each item, listed under the first author¿s name. The primary entry includes the coauthors¿ names, the title of the paper or other item, and its location, specified by the publication abbreviation, year, month, and inclusive pagination. The Subject Index contains entries describing the item under all appropriate subject headings, plus the first author¿s name, the publication abbreviation, month, and year, and inclusive pages. Note that the item title is found only under the primary entry in the Author Index. View full abstract»

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Aims & Scope

IEEE Wireless Communications Magazine deals with all technical and policy issues related to personalization, location-independent communications in all media.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Hsiao-Hwa Chen
Cheng Kung University, Taiwan