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We consider a channel with N parallel sub-bands. There is a single user that can access exactly k channels, while maintaining some minimum rate at each accessed channel. The transmission takes place in the presence of a jammer which can access at most m channels. We cast the problem as an extensive-form game and derive the optimal power allocation strategies for both the user and the jammer. We present...
We consider a channel with N parallel sub-bands. There is a single user that can access exactly k channels, while maintaining some minimum rate at each accessed channel. The transmission takes place in the presence of a jammer which can access at most m channels. We cast the problem as an extensive-form game and derive the optimal power allocation strategies for both the user and the jammer. We present...
This paper proposes a delay-aware resource provisioning policy for virtualized wireless networks (VWNs) to minimize the total average transmit power while holding the minimum required average rate of each slice and maximum average packet transmission delay for each user. The proposed cross-layer optimization problem is inherently non-convex and has high computational complexity. To develop an efficient...
Device-to-Device (D2D) communications underlaying cellular networks can improve the network capacity and spectrum efficiency by sharing the cellular resources in the direct-transmission mode. However, the stringent interference between D2D and cellular systems can seriously repress the overall performance improvement. In this paper, we aim to solve this dilemma by applying the concept of differentiated...
Reservation mechanisms have been used to guarantee users' access to cluster resources at the desired time instead of adopting a batch mode processing, where jobs are processed at the nearest time in the future, risking to wait an uncertain amount of time before being run. Allowing the cluster to accept reservations, besides queued jobs, has a major impact on the average response and waiting time of...
We propose a game theoretical approach to multi-type fair resource allocation algorithms in a distributed heterogeneous environment. Distributed approaches can benefit large scale computing systems, especially if the hardware computing resources in the system are organized in a decentralized manner as in federated clusters and cyber physical systems. The simulation results show that our approach has...
Fast and high utility channel allocation is one of the key issues of cognitive radio. In this paper, the channel allocation is formulated as a one-to-one matching game, and a distributed user-channel stable matching algorithm with low complexity is proposed to optimize the utility. We apply the algorithm to a hybrid underlay/overlay cognitive network in which secondary users utilize different manners...
A low-power configurable design for an asynchronous SAR ADC that is suitable for analog front-end of sensor ASICs is presented. The proposed architecture employs a majority vote based comparator capable of providing programmable noise performance. The proposed asynchronous digital logic determines the majority vote by employing two counters at the comparator differential output. Simulation result...
Among various protection and restoration schemes it is hard to decide which is the best to be used in a certain situation. First, we propose a method to find the best possible shared protection scheme among all possible shared protection schemes. We provide optimisation and simulation results. Second, we prove the optimality of the proposed method in terms of minimal resource usage for any single...
In this paper, we analyze moments of instantaneous signal-to-noise ratio (SNR) in a multichannel relay system with subchannel pairing (SP) over Rayleigh fading environments. With aid of order statistics, new unified expressions of moments of the SNR are derived in closed-form for three SP cases, i.e., ordered subchannel pairing (OSP), reversely ordered subchannel pairing (ROSP) and non-subchannel...
Orthogonal frequency division multiple access (OFDMA) is an effective method to reduce inter symbol interference in LTE systems. Doppler shift, however, leads to a loss of sub-channel orthogonality, resulting in inter-channel interference in high speed environment. Firstly, this paper develops the mathematical formulae describing the interference on resource block (RB) which is the smallest resource...
Resource management is one of the main services that all cloud models must ensure. This objective can be done either by the customer (using an application manager) or by the provider (with a server consolidation system). A cooperative resource management policy exploits elastic VMs and knowledge sharing between the customer and the provider in order to support splitting and merging virtual machines...
In this paper, we present an optimal charging algorithm for multiple devices in the perspective of user satisfaction fairness. The proposed algorithm can maximize the total sum of the increment of user satisfaction levels in a finite charging scheduling period. In order to develop the algorithm, we define an objective function that includes the characteristics of charging capacity behaviors for the...
Ad-hoc networks are promising complements for the infrastructure based network under disastrous scenarios. However, due to the heterogeneous surrounding environment of each user, the channel availability of each user may be quite different. Cognitive radio emerges as a promising technology to enable two users to communicate under different channel availability, by opportunistically accessing available...
This paper puts forward a distributed coalition formation algorithm for the specific network structure of multi agent system. First, each agent puts forward an application to join their neighbors which "price ratio" is highest and forms a potential alliance. When the union resource is greater than the corresponding task resources demand, make corresponding agent to withdraw from the league,...
In this paper, we propose a new method of secrecy signal and artificial noise (AN) transmission for a MISO wiretap channel in wireless cellular networks. We first design the secrecy signal beamformer such that its power leakage to the unintended directions is minimized, then we concentrate the AN on the directions with higher risk of information leakage, rather than broadcast it isotropically, such...
This paper presents an efficient resource allocation approach for outband device-to-device communication within cellular networks. The proposed method aims to maximize bandwidth resource utilization and simplify system protocols, greatly optimizing throughput by minimizing the number of blocked connections and increasing the ease of operation. Using this method, bandwidth resources can be effectively...
This paper studies the performance of a distributed system. In particular, our work focuses on the study and comparison of job scheduling techniques in a cluster that could be part of a computational Grid. We examine two different job allocation policies, one static and one dynamic, and three job scheduling policies combined together. The performance of different scheduling schemes is compared over...
Physical Distribution is a bottleneck in E-commerce and reverse logistics has become a bottleneck restricting the development of e-commerce. This paper constructs the distribution system in E-commerce logistics based on gridding management, via the comparison analysis between grid and non-grid distribution system in E-commerce logistics through computer simulation, verifies the grid used in e-commerce...
Co-locating the computation as close as possible to the data is an important consideration in the current data intensive systems. This is known as data locality problem. In this paper, we analyze the impact of data locality on YARN, which is the new version of Hadoop. We investigate YARN delay scheduler behavior with respect to data locality for a variety of workloads and configurations. We address...
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