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One of the key characteristics of cellular Machine-to-Machine (M2M) communications is the generation of small data packets by a large number of devices. The excessive control signaling required for dynamic scheduling of such uplink data in the Long Term Evolution (LTE) standard impedes the deployment of LTE networks for M2M communications. Traditional Semi-persistent scheduling (SPS) reduces the load...
This paper analyzes and simulates the performance of irregular Low Density Parity Check (LDPC) Codes on different channels. LDP Coding is a technique used in communication system for error correction of the information signal. This technology is also being used in telephone channel identification, modem echo cancellation and many other communication applications. LDPC codes reduce the noise closest...
Current indoor navigation solutions face many problems in hospitals. Heavy electro-magnetic interference from hospital equipment affects the compass on a mobile device. Existing infrastructure may also need to be replaced or modified to provide better signal triangulation indoors. Current solutions are challenging in terms of cost (for both hospitals and users) and disruption of normal operation....
This paper describes new concepts and techniques for an indoor positioning system that uses near-ultrasonic sound from a smartphone. The indoor positioning system can be used in many practical applications, for example, in detecting the location of moving objects, such as a person or a wheelchair, and navigation within a wide indoor area. Indoor positioning systems seem to require a higher positioning...
Scalable video coding (SVC) features a flexible media representation that enables adaptive streaming as network conditions change. However, existing SVC simulation tools do not support adaptive video transmission. In this paper, we present an Adaptive VIdeo Simulation (AVIS) framework for SVC in network simulator 2 (NS2). The framework includes two new NS2 objects, including AVIS transmitter and receiver,...
There are pedagogical shifts in learning where self-educated are being encouraged to be active in their own learning. Educational research increasingly recognizes the fact that a significant amount of learning is happening in the informal settings. Furthermore, due to the proliferation of varieties of products, consumers need to be educated with relevant information of the products in the informal...
In this paper, we present a novel solution for mobile commerce websites ranking problem in the case of uncertainty. As a case study, we will rank three m-commerce websites according to their fuzzy evaluation for seventeen fuzzy criteria. The implemented methodology is a brain-inspired one based on the emotions processing in the brain and the fuzzy sets theory.
The presence of coverage holes in a wireless sensor network has severe consequences on the performance of the network, that affects coverage, connectivity and routing paths. A number of approaches had been proposed to heal coverage holes in WSN. However, these approaches had tried to reach a full coverage, but ignored the large overlapping coverage area created. This paper presents a Healing Algorithm...
The implementation of SIP signaling over MANET is still a challenging issue, as many routing factors affect SIP performance. Node mobility and dynamic hop number changes between nodes are considered the main routing problems within MANET routing protocols. RFC 6076 proposed end-to-end performance metrics for SIP signaling to provide a standardized method of evaluating SIP performance over different...
Spectrum sensing is an important activity in the Cognitive Radio (CR) scenario. Presence of primary users (PU) over a specific band has to be monitored periodically in each time slots. Spectrum sensing and data communication have to be completed in each time slot. If we can reduce the time required for spectrum sensing, more data can be transmitted in the specified time slot. If the presence of a...
This work presents a novel geospatial mapping service, based on OpenStreetMap, which has been designed and developed in order to provide personalized path to users with special needs. This system gathers data related to barriers and facilities of the urban environment via crowd sourcing and sensing done by users. It also considers open data provided by bus operating companies to identify the actual...
Healthcare plays a significant role within a Smart city environment. Technology provides unprecedented opportunities to improve the delivery, effectiveness and quality of care an individual receives. This work focuses on the personalisation of Public healthcare services for services users, via the provision of mHealth applications. This paper describes the design considerations for developing a cloud-based...
Object tracking in the Internet of Things (IoT) has become a hot topic over the past ten years. Currently, the integration of video and radio-frequency identification (RFID) technology plays a crucial role in item-level activity recognition. Various techniques and applications have been proposed for visual object tracking. However, identifying semantic features of item-level objects in huge size of...
Consumer interaction on Internet is establishing a new digital channel between the brands and their audiences. Exabytes of data are created everyday as information based on data models that keep growing in volume and variety. Predictive consumer scoring models have achieved significant lifts in conversion rates. Using the statistical techniques and other consumer web pioneers, personalized Predicate...
In order to achieve one-to-many data delivery on the internet, native multicast is used and implemented in some parts of the Internet. On the other hand, application layer multicast (ALM), which uses P2P overlays (overlay multicast, OM), can be used to create multicast trees and deliver the data at the application layer. Despite Native Multicast being more efficient than Application Layer Multicast,...
The recent indoor localization techniques use inertial sensors for position estimations in order to obtain a certain degree of freedom from infrastructure based solutions. Unfortunately, this dependency cannot be completely eliminated due to the cumulative errors induced in the localization process. While many methods are designed to reduce the required number of reference points or try to offer unsupervised...
Brick-and-mortar stores for non-food items allow customers to quickly try items and take them home, but lack certain convenient features of online shopping, such as personalised offers and recommendations for items of possible interest. Mobile in-store shopping applications would allow to combine these advantages if they would derive current customer needs from customer activities. A natural way to...
Smart phones, particularly Android based, have attracted the users community for their feature rich apps to use with various applications like chatting, browsing, mailing, image editing and video processing. However the popularity of these devices attracted the malicious attackers as well. Statistics have shown that Android based smart phones are more vulnerable to malwares compared to other smart...
A dual extended noise shaping based time-interleaved symmetric cross-coupled sigma-delta modulator, which enhances the performance of conventional unextended and extended noise shaping based time interleaved cross-coupled sigma-delta modulator architecture, is proposed in this paper. The N-path first order cross-coupled sigma-delta modulator can attain only Nth-order noise shaping for unextented case...
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