Consumer Communications and Networking Conference 

About: Consumer Communications and Networking Conference is an academic conference. The conference publishes majorly in the area(s): Computer science & Wireless sensor network. Over the lifetime, 4466 publications have been published by the conference receiving 42090 citations.

FilmTrust: movie recommendations using trust in web-based social networks

Abstract: In this paper, we present FilmTrust, a website that integrates Semantic Web-based social networks, augmented with trust, to create predictive movie recommendations. We show how these recommendations are more accurate than other techniques in certain cases, and discuss this technique as a mechanism of Semantic Web interaction.

Smart e-Health Gateway: Bringing intelligence to Internet-of-Things based ubiquitous healthcare systems

Abstract: There have been significant advances in the field of Internet of Things (IoT) recently. At the same time there exists an ever-growing demand for ubiquitous healthcare systems to improve human health and well-being. In most of IoT-based patient monitoring systems, especially at smart homes or hospitals, there exists a bridging point (i.e., gateway) between a sensor network and the Internet which often just performs basic functions such as translating between the protocols used in the Internet and sensor networks. These gateways have beneficial knowledge and constructive control over both the sensor network and the data to be transmitted through the Internet. In this paper, we exploit the strategic position of such gateways to offer several higher-level services such as local storage, real-time local data processing, embedded data mining, etc., proposing thus a Smart e-Health Gateway. By taking responsibility for handling some burdens of the sensor network and a remote healthcare center, a Smart e-Health Gateway can cope with many challenges in ubiquitous healthcare systems such as energy efficiency, scalability, and reliability issues. A successful implementation of Smart e-Health Gateways enables massive deployment of ubiquitous health monitoring systems especially in clinical environments. We also present a case study of a Smart e-Health Gateway called UTGATE where some of the discussed higher-level features have been implemented. Our proof-of-concept design demonstrates an IoT-based health monitoring system with enhanced overall system energy efficiency, performance, interoperability, security, and reliability.

Bluetooth positioning using RSSI and triangulation methods

Abstract: Location based services are the hottest applications on mobile devices nowadays and the growth is continuing. Indoor wireless positioning is the key technology to enable location based services to work well indoors, where GPS normally could not work. Bluetooth has been widely used in mobile devices like phone, PAD etc. therefore Bluetooth based indoor positioning has great market potential. Radio Signal Strength (RSS) is a key parameter for wireless positioning. New Bluetooth standard (since version 2.1) enables RSS to be discovered without time consuming pre-connection. In this research, general wireless positioning technologies are firstly analysed. Then RSS based Bluetooth positioning using the new feature is studied. The mathematical model is established to analyse the relation between RSS and the distance between two Bluetooth devices. Three distance-based algorithms are used for Bluetooth positioning: Least Square Estimation, Three-border and Centroid Method. Comparison results are analysed and the ways to improve the positioning accuracy are discussed.

Optimization of Spectrum Sensing for Opportunistic Spectrum Access in Cognitive Radio Networks

Abstract: Motivated by the low utilization of the licensed spectrum across many frequency bands, sensing-based oppor- tunistic spectrum access has recently emerged as an alternative to the outdated exclusive spectrum access policy. Under this new paradigm, a secondary (unlicensed) user monitors a primary (licensed) frequency band for a given time and opportunistically transmits if it does not detect any ongoing licensed operations. Evidently, selection of the sensing parameters involves balanc- ing a tradeoff between the speed and the quality with which the secondary user senses the licensed band. With the average throughput as the performance criterion, we obtain the sensing parameters so as to optimize the performance of the secondary user while providing the primary user with its desired level of interference protection. I. INTRODUCTION As evidenced by recent measurements, many frequency bands across the licensed spectrum are significantly under- utilized (1), (2). This finding suggests that the spectrum scarcity, as perceived today, is largely due to the inefficient fixed frequency allocations rather than the physical shortage of the spectrum and has led the regulatory bodies to consider the opportunistic access to the temporally/spatially unused licensed bands (a.k.a. the white spaces) as a means to improve the efficiency of spectrum usage. In the absence of cooperation or signalling between the primary licensee and the secondary users, spectrum availability for the opportunistic access may be determined by direct spectrum sensing where the secondary user monitors a licensed band for a given "sensing time" and opportunistically transmits if it does not detect any ongoing licensed operations. This approach is particularly appealing due to its low deployment cost and its compatibility with legacy primary users and is being considered for inclusion in the upcoming IEEE 802.22 standard for opportunistic access to the TV spectrum (3). Due to their ability to autonomously detect and to react to the changes in the spectrum usage, secondary users equipped with the spectrum sensing capability may be considered as a primitive form of the cognitive radio (4). Design of any sensing scheme involves balancing a tradeoff between the quality and the speed of sensing through an appropriate selection of the sensing time. As we shall illustrate, in the context of spectrum sensing, sensing time may be fine- tuned to enhance the secondary users' perceived quality-of- service (QoS) as long as the regulatory constraint for the protection of the primary users against harmful interference is satisfied. In particular, we will obtain the optimum sensing times at different stages of the spectrum sensing to maximize the average throughput of the secondary user. In this paper, simple energy detection (a.k.a. radiometry) (5) is chosen as the underlying detection scheme. In general, when some information about the structure of the primary signal is available, ad hoc feature-detectors offer a better performance (6). We note, however, that the methodology employed in this paper may be applied to optimize different spectrum sensors once the sensing quality is characterized in terms of the sensing time. The remainder of this paper is organized as follows. The regulatory constraints on spectrum sensing are described in the following section. Section 3 provides an overview of the energy-based spectrum sensing. The optimum sensing times for different stages of the spectrum sensing are derived in Section 4. Finally, this paper is concluded in Section 5.

IEEE 802.11ad: Defining the Next Generation Multi-Gbps Wi-Fi

Abstract: IEEE 802.11ad will take advantage of the luge swath of available spectrum in the 60 GHz band to develop a protocol to enable throughput intensive applications such as wireless display and high speed sync-and-go file transfer. Functional requirements, evaluation methodology, and channel models are currently being developed by the task group in preparation for a call for proposals. Likely enhancements to 802.11 beyond a new 60 GHz PHY include Personal Basic Service Set, MAC modifications for directional antennas, fast session transfer between PHYs, beamforming, and spatial reuse. Therefore in this paper we give an overview of IEEE 802.11ad, which is poised to define the next generation multi-Gbps Wi-Fi.