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Pervasive networks formed spontaneously by wireless mobile devices capable of ad hoc communication make it possible to get services from these devices, and to compose them dynamically so as to provide people with new and more sophisticated application services. Discovering, invoking and composing services in such networks are challenging tasks, due to the numerous and unpredictable connectivity disruptions...
Although IEEE 802.11p technology is standardized for road safety and efficiency applications, the channel congestion problem is its key weakness necessitating distributed congestion control (DCC) algorithms on different layers of the communication stack. In this paper, we propose DCC-enabled Contention based Forwarding scheme targeting multi-hop dissemination of Decentralised Event Notification Messages...
Smart grid (SG) has been recognized as a promising solution to manage and distribute electricity in the next generation power systems. The large number of devices in power systems make the wired communication a non feasible solution, thus wireless transmission becomes necessary. However this demands a huge portion of radio spectrum. In this work, we aim to provide the secure and reliable SG communication...
Internet of vehicles (IoVs) emerges as a promising technology to facilitate vehicular wireless communication by approving vehicle-to-everything (V2X) services for intelligent transportation systems including vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I) and vehicle-to-pedestrian (V2P) services. V2V networks have been rapidly developed to support short distance data transmission among vehicles...
The predictive proportional integral (PPI) controller being simple and non conservative like its Smith predictor and internal model control (IMC) counterparts, has the ability to be employed in environments characterised by uncertainties such as stochastic network delays. However, its performance degrades in the presence of measurement noise. This is due to the prediction involve in the controller...
To satisfy diverse use cases and business models in fifth generation (5G) wireless communication, network slicing in fog radio access networks (F-RANs) is proposed, which provides a cost efficient networking in a convenient way. However, the resource management for network slices is challenging, especially when the edge caching is utilized to alleviate the fronthaul burden and reduce the delay. In...
Compressive random access scheme is considered one of promising candidates for future Machine Type Communications. It enables one-shot detection, which means that the preamble, channel estimation, and data detection could be carried out at once to keep signaling overhead low. For one-shot detection, improving the performance in terms of the number of successfully received preambles is necessary. To...
Active queue management (AQM) is broadly accepted as the tool of choice for tackling bufferbloat (the accumulation of large queueing delays) in network buffers. CoDel and PIE are considered two of the most promising AQM schemes, but little has been done to adopt them in cellular networks, which are particularly plagued by bufferbloat. This is partly due to the lack of adequate evaluation of their...
Recently, wireless caching techniques have been studied to satisfy lower delay requirements and offload traffic from peak periods. By storing parts of the popular files at the mobile users, users can locate some of their requested files in their own caches or the caches at their neighbors. In the latter case, when a user receives files from its neighbors, device-to-device (D2D) communication is enabled...
OFDM is mainly used to combat the effect of multipath reception by dividing the frequencies among the subbands. This paper presents an enhanced channel estimation method to improve the performance of high mobility OFDM systems. BP, OMP, LS, LMMSE are the existing compressed sensing approaches for high mobility OFDM systems. Further, Normalised LMMSE is used and performance is measured and compared...
With WSN technologies becoming more reliable, sophisticated and more capable of meeting the demands of market opportunities and with its broad applications and new emerging trends like: internet of things and integrated web-based services, there still a need for developing protocols to manage and improve coherence and consolidation of the network. Video sensing can be involved in most of the WSN applications...
Due to a wider range of services in future heterogeneous cellular network (HCN), packet transmission delay becomes a more essential performance metric for system design. In this paper, we propose an analytical framework to derive the delay performance of HCN in terms of local delay, by modeling the locations of base stations (BSs) in HCN as superimposed of independent Poisson point processes. In the...
In two-tier heterogeneous cellular networks (HCN) where small cells are deployed overlaid with macro cells, base station (BS) association is one of the fundamental problems, which becomes even more challenging when the small cell BSs are connected to the gateways via imperfect backhaul links, e.g. using wireless technologies. In this paper, we first analyze the mean packet delay in radio access and...
This paper considers the problem of reducing the broadcast delay of wireless networks using instantly decodable network coding (IDNC) based device-to-device (D2D) communications. In D2D-enabled networks, devices help hasten the recovery of the lost packets of devices in their transmission range by sending network coded packets. To solve the problem, the different events occurring at each device are...
We consider wireless sensor networks (WSN) powered by energy harvested from the environment, which is assumed to be sporadic and random in nature. Wireless nodes in such networks experience random active and sleep periods depending on their energy availability, leading to intermittent connectivity in the network. This paper addresses the problem of minimizing the multi-hop transmission delay in such...
Cooperative transmission system is proposed approach to wireless communication for industrial use. This system is suitable for a factory channel environment, because it can prevent packet delay resulting from long term shadowing with maintaining low power consumption. In this paper, several simulations are made to investigate the packet delay and power consumption properties. They have been carried...
Alamouti Proposed Orthogonal STBCS for two transmit antennas with code rate one. Tarkoh investigated for three to eight transmit antennas with code rate is ½. Jafarkhni proposed for non orthogonal STBCS four transmit antennas with code rate is one. Tarokh, Jafarkhani, and Calderbank[3] gave the transmitting antennas code rate- ½ for nine transmit antennas code has delay 32. This paper intends new...
The tremendous popularity of smart phones and electronic tablets has spurred the explosive growth of high-rate multimedia wireless services. To alleviate the huge infrastructure investment in the exponential growth of mobile traffic and improve local service flexibility, device-to-device (D2D) communications have been considered for the next generation mobile telecommunications. This has triggered...
In recent years, home ICT services have been actively proposed. To realize the services, power consumption of sensor station increases when a sensor station often wakes up to report sensor data. In this paper, we proposed an application-aware power-saving control method for sensor stations and confirmed an effect of a proposed method which is constructed as OSGi bundle in HGW. By using the proposed...
Telehealth applications such as Video-over-IP and remote sensor monitoring are rapidly growing in utilisation and it has now expanded to the patient's homes. These Telehealth applications are, however highly delay sensitive and require high quality (and bandwidth priority) in order to provide satisfactory performances. However, at the patient's home area network (HAN) environment, typically there...
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