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In this paper, we address the problem of energy-aware user satisfaction in self-organizing networks. Our main objective is to meet with the users requirements while reducing energy consumption. Accordingly, we aim at seeking satisfaction equilibria, mainly the efficient satisfaction equilibrium (ESE). We first define conditions of existence and uniqueness of ESE. Considering information-theoretic...
Cognitive Radio Network (CRN) is a promising wireless communication solution whereby radio resources are automatically varied to optimize performance in the changing wireless environment. Our work focuses on distributed CRN with rational and independent users. The eventual state often reached in such a system is Nash Equilibrium (NE); multiple NEs with different performance exists. In this paper we...
Base Stations (BSs) in LTE networks face heavy traffic demand from User Equipments (UEs) for voice, online gaming, video calls, file transfers, etc., We consider a LTE Device-to-device (D2D) network where LTE UEs have primary access to the spectrum and D2D pairs have secondary access. In order to offload traffic from BS and to enhance spectral efficiency, operators can activate multiple D2D pairs...
Noise in the image are random variations in intensity due to intrinsic or extrinsic sources. This paper proposes a high throughput Fixed Point Discrete Kalman filter (DKF) architecture for denoising images with additive white Gaussian noise (AWGN) at real-time. A linearized state model based on neighbor pixel similarity is used for improving the PSNR of the noisy image. A 5-stage two parallel bi-functional...
The physical layer (PHY) of IEEE Std. 1901-2010 (IEEE 1901) recommends Wavelet OFDM as medium access technique for broadband communication over the power line network. In this standard, the proposed filter bank multicarrier (FBMC) system is based on the Extended Lapped Transform (ELT) and since the transmitting and the receiving filters are obtained from a prototype filter, a ‘mother filter’ to get...
Wireless Sensor Networks (WSNs) play as a key important role in Internet of things era, they provide a lot of utilized applications deployed in quite different environments. Beside its clear benefits, a WSN has to face with several challenges which come from a practical environments such as interference phenomenon, energy limitation, transmission constraints or mobility model. Especially, several...
A port-Hamiltonian model of the traffic dynamics for a wireless communication system was developed in our previous work. The developed model takes into account various wireless communication aspects: such as a wireless path loss model, the characteristics of a wireless communication system, mac layer and network layer protocols, antenna design, latencies, buffer dynamics, acknowledgment rate and so...
In this paper, we propose, a new scheduling algorithm for LTE-A uplink systems entitled Multi-user Resource Allocation Process (MURAP). The latter supports uplink multi-user transmissions. Indeed, the main contribution of this work is to allocate the Physical Resources Blocks (PRBs) of all Component Carriers (CCs) to Real Time (RT) and-non Real Time (NRT) users using various criteria. Our proposed...
In recent years, video traffic has been increasing due to the huge demands of video streaming services. Peer-to-peer (P2P) video streaming services (P2PTV) have attracted attention as a solution to decrease the server load because P2P communication can distribute the video data to peers. However, the random peer selection mechanisms of P2PTV conduce to the worldwide spread of P2PTV traffic, and thus...
Resource management approaches are necessary for managing the run-time dynamics originating from application dynamism, platform reliability degradation and changing operating conditions. Existing on-chip resource managers assume that resources are always available and are biased toward application requirements. This paper presents Agora, a distributed resource management framework based on market...
Deployment of Multiple Cognitive Radio Networks (CRNs) is a very common scenario in today's world, like in the field of defence or disaster management. In this paper, we deal with the case of multiple numbers of co-located CRNs acting as secondary network along with one primary user (PU). We study the node based throughput performance of a CRN in presence of several coexisting CRNs. We generalize...
When social behaviors are considered into ad hoc wireless networks, the users prefer to forward the traffic from their social contacts. In this way, the network capacity is highly related with the social characteristics. To this end, we apply a social contact based wireless network model and explore its throughput capacity. The wireless network capacity will get improved when the contacts are located...
In multi-channel cognitive radio ad hoc networks (CRAHNs), packet fragmentation is impacted by new factors besides those in traditional wireless networks due to the unique CR functions. For example, spectrum handoff is the technique for a secondary user (SU) to continue its transmission when a primary user (PU) reoccupies its current transmitting channel. Then, a short frame is less likely to be affected...
This paper provides analysis and debottlenecking strategies for batch process plants. Operational characteristics like shared resources, multiple products and product lines, and process step variability can make debottlenecking choices complex. A disciplined methodology for debottlenecking helps an improvement team to sift through options efficiently to find cost-effective recommendations that meet...
The emergence of cloud computing technology aims at sharing resources such as storage, knowledge, computation and information for scientific research at an expanded scale. The application about associated data are deployed by the cloud users as paying the bills when they get due. Such data-intensive applications are normally commanded by the virtual machines (VMs). Data at a large scale are analyzed...
Resource and buffer allocation problems are well-known topics in manufacturing system research. A proper allocation of resource and space can significantly improve the system performance and reduce the investment cost. However, few works consider the joint problem because of its complexity. Recent research has shown that Discrete Event Optimization (DEO) framework, an integrated simulation-optimization...
To address the challenge of unprecedented growth in mobile data traffic, ultra-dense network deployment is a cost efficient solution to offload the traffic over some small cells. The overlapped coverage areas of small cells create more than one candidate access points for one mobile station. Signal strength based user association in IEEE 802.11 results in a significantly unbalanced load distribution...
In this paper, we investigate the influence of intra-and inter-cell mobility of users on performance of 4G/5G cellular networks, such as LTE and LTE-A. To this end, we develop a multi-class PS queue model that captures mobility of users between zones of a cell and between cells, through a simple mobility model, that is decoupled from the cell model itself, enabling to directly apply the approach to...
In recent times, there has been an increase in the number of mobile devices to access a variety of services on radio access network, and the trend is expected to continue. In addition, ultra-low latency services require much bandwidth and often characterized by having extremely short delay constraints. Hence, satisfying required strong QoS requirement becomes challenging task. Existing scheduling...
This paper deals with the critical problem of solving both the traffic control and assignment problems simultaneously. The main purpose of this work is to assess two well-known local control policies - Equisaturation and P0 - in terms of network-wide performances. While local control policies are, indeed, key building blocks to network-wide approaches, little effort has been done to evaluate their...
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