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Interference alignment (IA) is an efficient interference management technique that can result in sum-rates that scale linearly with the number of users at high signal-to-noise power ratio (SNR). But it is difficult to directly apply IA to large networks because of heavy signaling overhead and feasibility constraint. Clustered IA divides cells into disjoint clusters where IA is applied in each cluster...
Big Data represents large amount of data which have high velocity and high variety. Contribution towards the big data increases, as the technology develops. Wireless sensor networks are considered as the main contributor of big data. Hence collecting large amount data or big data from sensor nodes is an important concern in the field of information and communication technology. Mobile sink approach...
Wireless Sensor Networks (WSNs) received much attention from researchers thanks to its wide range of applications. Among great number of factors to measure the quality of WSNs, connectivity is always considered as one of the most important criteria. Therefore, this paper extensively focuses on ensuring the connectivity of WSNs. This problem has been proved to be NP hard. Previous studies on this field...
Recent research activities have recognized the essentiality of node mobility for the creation of stable, scalable and adaptive clusters with good performance in mobile ad hoc networks (MANETs). In this paper, we propose a distributed clustering algorithm based on the group mobility and a revised group mobility metric which is derived from the instantaneous speed and direction of nodes. Our dynamic,...
Resource sharing is a major problem in distributed networks as systems have resources in common. To guarantee the correctness of data written in the shared resource also called CS (critical section) mutual exclusion is proposed as a solution. Mobile ad hoc Networks are unstable distributed networks formed dynamically by the connections of wireless battery-powered nodes without the use of an existing...
Typically, wireless sensor network (WSN) uses static sinks to gather sensor data. However, it brings not only excessive sink installation cost but also energy-hole problem. In this paper, we consider data acquisition with guaranteeing latency in WSN by multiple mobile sinks. In particular, we optimize the number of sinks as well as the itinerary of each sink for this problem such that the total cost,...
Resource constraint and random mobility are two main factors affecting system performance in mobile sensor networks, which cause many difficulties on system designing. In this paper, an adaptive-coded-modulation scheme is introduced to optimize the limited system resource. On the basis of the optimal scheme, a delay calculating algorithm is proposed to acquire the delay bounds of mobile sensor networks...
Finding and recommending suitable services on mobile devices is an important topic in today's society where most people rely on their smartphones to provide solutions to their day-to-day problems or to receive prescribed services. Recent research has attempted to use role-based approaches to recommend mobile services to other members among the same context group. However, these proposed algorithms...
Mobile video surveillance plays an important role in public security monitoring. As it is convenient to get access to the system, mobile video surveillance has a large number of customers, thus load balance of the mobile streaming media server is one critical issue of this application. In order to maintain system load balance, we propose a mobile streaming media server cluster solution based on the...
Mobile telephony is rapidly evolving, and one-tomany group applications, such as Push to Talk over Cellular (PoC) services, are expected to be more prevalent in the near future. The core issue that needs to be addressed in order for such services to be practical on a large scale is the efficiency. Location management is a key control task in cellular network operations. We propose an efficient group...
Internet of Things involves many key technologies, one of which is wireless sensor networks. Based on the classical LEACH clustering algorithm combined with the characteristics of hybrid network topology and for saving node energy consumption and node mobility, this paper puts forward a new improved LEACH routing algorithms-Mobile Node selected cluster method and dynamic node routing algorithms (Dynamic...
The main objective of this research is to design, implement, and evaluate a new generation of smart mobile data mining techniques called SmartMobiMine that will be used in the integrated structure of the 4G mobile networks to support and develop the essential services in mobile networks. SmartMobiMine techniques will integrate different types of information to support mobile users. Our research will...
Recent technological advancements have led to the popularity of mobile devices, which can dynamically form wireless networks. Unfortunately, mobile devices are vulnerable to failure because of various factors, including physical damage due to deployment in harsh environmental conditions, limited energy, and malicious attacks. Detecting node failure is an important problem that has been widely studied;...
The dynamic coverage problem is increasingly found in a wide variety of areas, for example, from the development of mobile sensor networks, to the analysis of clustering in spatio-temporal dynamics of brain signals. In this paper, we apply control-theoretic methods to locate and track cluster center dynamics and show that dynamic control design is necessary to achieve dynamic coverage of mobile objects...
Mobile ad hoc networks are composed of nodes communicating with each other without any infrastructure. Position based routing algorithms used in these networks makes the decision of routing by considering the location information of wireless nodes. In this study, the effect of using fuzzy logic during the decision making about routing of nodes that are using one of the location information based algorithm...
One of the major problems in Mobile Grid environments is the optimal distribution and replication of data files, in order to improve and maintain a high overall throughput of Grid jobs that access files. A data replica replacement algorithm based on value model is proposed and the arithmetic method to calculate replica value is introduced. This algorithm adapts to the high variation environment in...
Hybrid sensor network (HSN) is composed of a set of static and mobile sensor nodes. Besides the capabilities of sensing, computing and communicating like static nodes, mobile nodes have locomotion capability particularly. Area coverage is one of the most fundamental metrics for hybrid sensor network because it is crucial to the quality of monitoring. In order to improve the network coverage, we employ...
In this paper, we consider the general class of coverage and clustering problems in a dynamic environment, and propose a computationally efficient framework to address them. We define the problem of achieving instantaneous coverage as a combinatorial optimization problem in a Maximum Entropy Principle framework. We then extend the framework to a dynamic environment, thereby allowing us to address...
Target tracking is one of the non trivial applications of wireless sensor network which is set up in the areas of field surveillance, habitat monitoring, indoor buildings, and intruder tracking. Various approaches have been investigated for tracking the targets, considering diverse metrics like scalability, overheads, energy consumption and target tracking accuracy. This paper for the first time contributes...
An ad hoc network is a local network that is built spontaneously as devices connect. Instead of relying on a base station or the centralized device, to coordinate the flow of messages to each node in the network, the individual network nodes forward packets to and from each other. So finding a route to a destination can be complexe. The clustering problem consists to partition the network into groups...
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