Network alignment generalizes and unifies several approaches for forming a matching or between the vertices of two graphs. We study mathematical programming framework network problem sparse variation it where only small number matches graphs are possible. propose new message passing algorithm that allows us to compute, very efficiently, approximate solutions problems with graph sizes as large hundreds thousands vertices. also provide extensive simulations comparing our algorithms best...

High energy consumption is one of the key issues cloud computing systems. Incoming jobs in environments have nature randomness, and compute nodes to be powered on all time await incoming tasks. This results a great waste energy. An energy-saving task scheduling algorithm based vacation queuing model for systems proposed this paper. First, we use with exhaustive service schedule heterogeneous system. Next, busy period cycle under steady state, analyze expectations sojourn Subsequently,...

An analysis of steganographic systems subject to the following perfect undetectability condition is presented in this paper. Following embedding message into covertext, resulting stegotext required have exactly same probability distribution as covertext. Then no statistical test can reliably detect presence hidden message. We refer such schemes perfectly secure. A few been proposed recent literature, but they vanishing rate. prove that communication performance potentially be vastly...

A cellular network is usually modeled and analyzed as a Poisson point process (PPP). However, small cells are ordinarily clustered around hotspots in urban areas, which cannot be accurately with PPP. This letter presents an analysis of the downlink coverage that Matern cluster (MCP). new accurate formula for probability generating function MCP derived. We also propose distribution desired distance (i.e., between user serving cell) based on spherical contact Boolean model. The above two...

We analyze the delay performance of small cell networks operating under random scheduling (RS) and round Robin (RR) protocols. Based on stochastic geometry queuing theory, we derive accurate tractable expressions for distribution mean delay, which accounts impact traffic arrivals, interactions, failed packet retransmissions. Our analysis asserts that RR outperforms RS in terms regardless statistic. Moreover, gain from is more pronounced presence heavy traffic, confirms importance accounting...

This paper takes into account the uncertainty of primary users' locations and transmission power in designing an optimal downlink scheduling scheme for cognitive radio cellular networks (CogCells). Localization technique is exploited to estimate position user (PU) transmitting on specific channel. The objective our maximize average throughput CogCells without causing harmful interference PUs. models problem as a mixed integer nonlinear programming (MINLP) problem, which has exponential...

Block-DCT based information embedding methods introduce distinctive non-stationarities into the stego-image. In particular, difference between neighboring pixel intensities in one block and across two blocks have different distributions. A universal binary hypothesis test is then proposed to discriminate stego-images unmarked images.

The presented 5G testbed aims to prototype an end-to-end mobile data-driven platform for experimental and interdisciplinary research. design implementation both indoor outdoor are described. introduces more flexibility compared previous generations of cellular networks higher performance allows customization verticals; meanwhile, it brings critical challenges system security user experience. Data collection at multiple components on the provides opportunity further Artificial Intelligence...

This paper addresses the evaluation of channel quality indicator (CQI) delay compensation schemes considering impact signaling interaction between evolved node B (eNodeB) and user equipments (UEs). The Jakes' model International Telecommunication Union (ITU) models are introduced, which representatives simple complex simulation environments, respectively. characteristics variation CQIs four typical scenarios analyzed in detail. We then propose two types CQI schemes, namely weighted mean...

Recently, research attempts have been made to jointly model spatial and temporal randomness in cellular networks. However, realistic modeling analysis of dynamic queuing interactions heterogeneous networks (HetNets) still need be investigated. In this letter, we establish a spatiotemporal for K-tier HetNet. Particularly, the locations base stations (BSs) from each tier as an independent Poisson point process (PPP). Packet arrivals are modeled Bernoulli processes. To reveal actual scenario,...

The exponential growth in the mobile data traffic promotes evolution of infrastructure, while takes grate challenges for designing 5G network, such as significant amount energy consumption and expenses, huge complexity on operation lack flexibility management. Software defined network (SDN) cloud computing are two promising technologies future due to their advantages simplicity efficiency operation. Heterogeneous radio access (H-CRAN) architecture is characterized by attributes both SDN...

Traditional two-dimensional (2D) multi-input multioutput (MIMO) beamforming technologies can only adjust the beamformers in horizontal dimension according to channel information. However, due three-dimensional (3D) character of real channel, 2D MIMO not achieve optimal system throughput. In this paper, a 3D scheme is proposed, which takes into account vertical beamforming. proposed scheme, we first design codebook for Vertical based on model; then combining and legacy codebook. Through...

In this letter, uplink sum rate of large-scale multiuser MIMO systems with maximum ratio combining receivers is analyzed. To be practical, no perfect channel state information assumed, and both large scale path loss small Rayleigh fading are considered. The losses experienced by multiple users also assumed to non-identical due different locations the users. A tight upper bound derived in closed-form. Its tightness verified simulations. It shown that proposed tighter than other bounds further...

Ultra-dense networks (UDN) can increase the network coverage and improve overall throughput which make it a promising technology. However, traditional resource allocation algorithms are concerned with improvement of performance network. This paper considers quality service (QoS) energy consumption each femtocell proposes game-theoretic hierarchical algorithm in UDN. Firstly, modified clustering is performed. Then we transform this problem to two-stage Stackelberg game. In sub-channel...

In this letter, uplink sum rate for multi-cell massive multi-user multiple-input multiple-output (MU-MIMO) systems with zero-forcing receivers is analyzed. To be practical, imperfect channel state information obtained through training assumed, and both large scale path loss small fading effects are considered. A tight upper bound on derived in closed form, which applicable to MU-MIMO any number of receiving antennas. The tightness the theoretically proved further demonstrated by computer...

Currently and thereafter, evaluations consensusbuilding process will be performed for the 4G candidates from ITU-R membership, standards organizations, other external evaluation groups. Among them, Chinese Evaluation Group (ChEG) is also responsible submitting report to ITU-R. This paper addresses methodology relevant activities. Descriptions basic rules in are given, according requirements of ITU-R, where simulation methods highlighted. Next taking 3rd Generation Partner Project Long Term...

In this work, we propose a channel allocation and power control algorithm for energy harvesting (EH) device-to-device (D2D) communication based on nonorthogonal multiple access (NOMA). The considers users’ quality of service (QoS) causality constraint to maximize the total capacity D2D groups. optimal offline is realized firstly. Then, optimization results are taken as training dataset train neural network obtain model transmission power. online further proposed. Simulation show that can...

Massive multiple input output (MIMO) is a promising technology for the next generation communication system to increase data rate and throughput. To fully enhance performance of massive MIMO improve quality service, accurate channel state information (CSI) required coherent detection. However, due overwhelming pilot overhead, conventional aided estimation (PACE) approaches are not suitable systems, especially frequency-division duplexing (FDD) systems. In this paper, we consider problem in...

For the evolved UTRA (EUTRA), cell edge bit-rate and system throughput become important criteria for evaluation of proposals requirements on performance. Inter-cell interference is main source performance degradation OFDM, especially data rate UEs severely limited. Many inter-cell mitigation schemes are proposed to improve EUTRA performance, active coordination in frequency domain resource allocation between neighboring cells. But they can't achieve robust bit when traffic load varies much....

A novel Built-In Self-Test (BIST) algorithm is proposed in this paper, which used for testing low-voltage SRAM. The the improvement of March C+ algorithm, integrates continuous write 0 and 1 operations to cover more fault models like Read Destructive Coupling Fault (CFrd), Write (CFwd) Disturb Fault. Consequently, higher coverage achieved than traditional algorithm. implemented by user defined (UDA) Mentor tools. In order verify effectiveness a 8T SRAM chip designed tested based on SMIC 40nm...

Crowd spectrum sensing (CSS) is a promising paradigm for discovering real-time radio resource availability with higher flexibility. Conventional CSS schemes encounter difficulties in the best trade-off between high accuracy of detection result and less consumptions energy network resources. To solve this problem, paper utilizes advanced intelligent reflecting surface (IRS) to improve performance meanwhile reduce consumption. IRS envisioned be equipped internet things (IoT) devices B5G...

Capacity and random-coding error exponent formulas are derived for a public fingerprinting (traitor tracing) game. The original media copy is available to the encoder, but not decoder. We derive stacked binning scheme. strictly positive at all rates below capacity. converse part of capacity proof based on Gel'fand-Pinsker technique

In packet-based OFDM WLAN systems (IEEE 802.11a/g/n), each packet has a fixed-length preamble for synchronization and channel estimation purposes. The carries no data information hence causes considerable overhead during transmission when the payload is short rate high. this work, we propose new scheme, called superimposed preamble, to improve efficiency of 802.11a alike systems. We design signal structure using variable an efficient receiver processing scheme perform joint training (time...