Journal of Communications
International Communication Association
About: Journal of Communications is an academic journal published by International Communication Association. The journal publishes majorly in the area(s): Wireless sensor network & Computer science. It has an ISSN identifier of 1796-2021. Over the lifetime, 2294 publications have been published receiving 16037 citations. The journal is also known as: JCM.
Topics: Wireless sensor network, Computer science, Key distribution in wireless sensor networks, Wireless network, Network packet
Papers published on a yearly basis
TL;DR: A detailed overview of the IEEE 802.22 draft specification, its architecture, requirements, applications, and coexistence considerations not only form the basis for the definition of this groundbreaking wireless air interface standard, but will also serve as foundation for future research in the promising area of CRs.
Abstract: In November/2004, we witnessed the formation of the first worldwide effort to define a novel wireless air interface (i.e., MAC and PHY) standard based on Cognitive Radios (CRs): the IEEE 802.22 Working Group (WG). The IEEE 802.22 WG is chartered with the development of a CR-based Wireless Regional Area Network (WRAN) Physical (PHY) and Medium Access Control (MAC) layers for use by license-exempt devices in the spectrum that is currently allocated to the Television (TV) service. Since 802.22 is required to reuse the fallow TV spectrum without causing any harmful interference to incumbents (i.e., the TV receivers), cognitive radio techniques are of primary importance in order to sense and measure the spectrum and detect the presence/absence of incumbent signals. On top of that, other advanced techniques that facilitate coexistence such as dynamic spectrum management and radio environment characterization could be designed. In this paper, we provide a detailed overview of the 802.22 draft specification, its architecture, requirements, applications, and coexistence considerations. These not only form the basis for the definition of this groundbreaking wireless air interface standard, but will also serve as foundation for future research in the promising area of CRs.
TL;DR: This paper demonstrates that under independent fading or shadowing, a low-overhead collaboration scheme with a very simple detector as its building block improves the spectrum utilization significantly and reduces the time and bandwidth resources required for satisfactory sensing which translates into higher agility and efficiency of the secondary access.
Abstract: Spectrum scarcity is becoming a major issue for service providers interested in either deploying new services or enhancing the capacity for existing applications. On the other hand, recent measurements suggest that many portions of the licensed (primary) spectrum remain unused for significant periods of time. This has led the regulatory bodies to consider opening up under-utilized licensed frequency bands for opportunistic access by unlicensed (secondary) users. Among different options, sensing-based access incurs a very low infrastructure cost and is backward compatible with the legacy primary systems. In this paper, we investigate the effect of user collaboration on the performance of sensing-based secondary access in fading channels. In particular, we demonstrate that under independent fading or shadowing, a low-overhead collaboration scheme with a very simple detector as its building block, 1) improves the spectrum utilization significantly, 2) enables the individual users to employ less sensitive detectors, thereby allowing a wider range of devices to access the primary bands, 3) increases the robustness toward noise uncertainty, 4) reduces the time and bandwidth resources required for satisfactory sensing which translates into higher agility and efficiency of the secondary access.
TL;DR: This paper surveys a comprehensive review of the available solutions to support wireless sensor network environmental monitoring applications by deploying a larger number of disposable sensor nodes.
Abstract: Traditionally, environmental monitoring is achieved by a small number of expensive and high precision sensing unities. Collected data are retrieved directly from the equipment at the end of the experiment and after the unit is recovered. The implementation of a wireless sensor network provides an alternative solution by deploying a larger number of disposable sensor nodes. Nodes are equipped with sensors with less precision, however, the network as a whole provides better spatial resolution of the area and the users can have access to the data immediately. This paper surveys a comprehensive review of the available solutions to support wireless sensor network environmental monitoring applications.
TL;DR: In this article, the role of political advertising, the Internet, and political discussion in civic and political life has been investigated, and an O-S-R-O-R (orientationsstimuli-reasoning-orientations-responses) framework has been proposed.
Abstract: Political communication researchers have devoted a great deal of attention to the role of political advertising, the Internet, and political discussion in civic and political life. In this article, we integrate and extend this research by developing a campaign communication mediation model of civic and campaign participation. Two data sets are merged for this inquiry: (a) content-coded ad-buy data on the placement of campaign messages on a market-by-market and program-by-program basis and (b) a national panel study concerning patterns of traditional and digital media consumption and levels of civic and campaign participation. Exposure to televised campaign advertising is estimated by developing an algorithm based on the market and program placement of specific ads and geocoded survey respondents’ viewing of certain categories of television content in which these ads were concentrated. Structural equation models reveal that advertising exposure drives online news use in ways that complement conventional news influences on political discussion and political messaging. However, campaign exposure emphasizing ‘‘attack’’ messages appears to diminish information seeking motivations via broadcast and print media, yet only indirectly and weakly suppresses participation in civic and political life. Further, alternative specifications reveal that our original model produces the best fit, empirically and theoretically. We use these insights to propose an O-S-R-O-R (orientations-stimuli-reasoning-orientations-responses) framework as an alternative to the longstanding O-S-O-R model in communication and social psychology.
TL;DR: This paper proposes a multi-platform UAV system and multi-model communication system for highly efficient power line inspection tasks in China and shows that the cooperative inspection for multi-UAVs can achieve a much higher efficiency than traditional inspection methods.
Abstract: The emerging technology of unmanned aerial vehicle (UAV) has become more affordable and practicable for power line inspections. In this paper, we propose a multi-platform UAV system and multi-model communication system for highly efficient power line inspection tasks in China. The different UAVs cooperatively serve as long-distance imaging, short dis- tance imaging and communication relay. The high quality im- age/video is transmitted in realtime to the on-site control station for UAV navigation and far end office for analysis. Our experi- ence shows that the cooperative inspection for multi-UAVs can achieve a much higher efficiency than traditional inspection methods. Index Terms—UAV, hexrotor, fixed wing, tethered rotor, pow- er line inspection, communication relay, datalink