The current cellular networks have evolved to be more randomly, irregularly, and heterogeneously deployed meet the exponential growth of mobile data traffic demand for seamless coverage, making signal-to-interference ratio (SIR) distribution challenging analyze. Therefore, in this paper, we propose two simple approximative approaches SIR general heterogeneous (HCNs) based on ASAPPP method, which stands "approximate analysis Poisson point process" MISR (mean interference-to-signal...

Accurate localization in harsh indoor environments has long been a challenging problem due to the presence of multipath. Since joint direction-of-arrival (DOA) and time delay (TD) estimation capability separate line-of-sight signal from multipath signals TD space, it recently become key technique for accurate next-generation WiFi 5G networks. This paper addresses azimuth, elevation, multiple reflections known signal. First, we propose an efficient approximate maximum likelihood algorithm...

Traditional low earth orbit mobile satellite systems (LEO-MSSs) cannot satisfy the demands of huge capacity in ultra-dense regions. In addition, due to frequent passive group handover caused by high speed movement LEO satellites, quality service (QoS) can hardly be satisfied. this paper, we propose an extensible multi-layer architecture model based on traditional LEO-MSSs solve these problems. proposed architecture, introduce high-altitude platforms (HAPs) and terrestrial relays (TRs) cover...

In millimeter-wave (mm-wave) cellular networks, directional antenna arrays are typically adopted to mitigate the severe propagation loss. However, interference caused by such highly beams may, in turn, result a significant number of transmission failures, especially for dense networks. To tackle this problem, we propose two inter-cell coordination (ICIC) schemes mm-wave bands: one is merely based on path loss incorporating blockage effect (PL-ICIC); other considers both and directivity gain...

Combining intelligent reflecting surface (IRS) with an unmanned aerial vehicle to form IRS (AIRS) swarms is effective way enable panoramic full-angle reflection, high configuration flexibility and reliable air-ground line-of-sight (LoS) connections, especially in millimeter wave (mmWave) bands. In this paper, we use stochastic geometry provide a performance analytical framework for AIRS swarm-assisted mmWave cellular networks, where each base station (BS) has swarm assist downlink...

Integrating device-to-device (D2D) communication into cellular networks is considered as a promising technology to support high data rate and improve spectrum utilization. However, the severe interference issue in D2D coexisting might erode benefits brought by communications. To address this critical issue, we first propose two exclusion-based activation schemes with hybrid allocation (named EDAH) sharing EDAS), where users (DUs) outside exclusion regions of base stations are active. Based...

The low Earth orbit (LEO) satellite constellation in the terahertz (THz) band is one of promising technologies to provide global coverage and high-rate transmission airplane, whose key performance evaluation required before realistic deployment. In this paper, we consider a downlink THz LEO satellite-airplane network with directional antennas, where satellites follow binomial point process on spherical surface. Incorporating distinctive propagation properties beams two scenarios with/without...

This paper provides a deep analysis for millimeter-wave device-to-device (mm-wave D2D) underlaid cellular networks to investigate how the performance of individual users or link percentiles under constraints are affected by interaction between D2D and communication modes integrated with salient mm-wave features. Under general Nakagami fading model, we derive upper bounds <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math...

Air platforms, such as unmanned aerial vehicles, airships, and balloons are expected to complement traditional ground networks provide flexible coverage solutions. However, most existing models for air-ground integrated (AGINs) neglect the spatial dependence caused by complementary deployment of nodes. Accordingly, in this paper, we propose two AGIN with horizontal that differ vertical dimension, namely uniformly independent altitudes location-dependent altitudes. The air platforms serve...

In UAV-assisted cellular networks (UACNs), the UAV tier should be flexibly adjusted to terrestrial tier, which causes location dependence between UAVs and ground base stations (GBSs). To capture it, this paper proposes a 3D UACN model with inter-tier analyzes performance of such network via stochastic geometry. Specifically, random altitudes are deployed outside exclusion regions GBSs avoid strong interference, accordingly, locations follow PPP marked Poisson hole process (MPHP),...

Low Earth orbit (LEO) satellites are becoming an increasingly promising solution for enhancing maritime communications and introducing a new avenue signal transmissions from shore-to-ship. The traditional performance modeling satellite networks based on grid of circular geometries does not apply to large-scale LEO communication networks, limiting analytical insights. To address this issue, paper proposes tractable theoretical framework satellite-aided shore-to-ship network (LEO-SSCN) that...

In 5G wireless communication network, massive machine type (mMTC) is an emerging research topic. For mMTC, non-orthogonal multiple access (NOMA) has been proposed to support its large-scale connectivity. Due the sparsity of compressed sensing based algorithms can be used identify active users and recover sparse channel state information (CSI) vector. this paper, we propose a Bayesian message passing algorithm on expectation propagation (EP) for joint user detection (AUD) estimation (CE) in...

Considering a heterogeneous cellular network where macro base stations (MBSs) are powered by grid power and small (SBSs) renewable energy. We investigate the energy minimization problem optimizing both MBS active probability (MAP) SBS transmit (STP) under constraints of user quality service (QoS) Using tools from stochastic geometry, we first derive expression outage to evaluate QoS. And then, impacts MAP STP on characterized. At last, optimization minimizing consumption is formulated,...

The station density is believed to be a crucial factor that affects the energy efficiency of relay-assisted cellular networks dramatically, which can not neglected for practical network design and planning. In this paper, we propose an analytical model investigate how networks. With aid stochastic geometry theory, derive coverage probabilities mean achievable rates both cooperative users non-cooperative users, based on these, further expression verify by simulation. Numerical results show...

The actual antenna pattern model makes it difficult to investigate the performance of directional arrays in large-scale networks. In this paper, we propose a novel pattern, named multi-level flat-top (MLFT) approximate and apply millimeter wave (mm-wave) cellular To study benefits depth, derive exact expression for coverage probability typical user its upper bound as well their corresponding asymptotic expressions. results show that proposed provides better tradeoff between accuracy...

The crushing demands for mobile data traffic drive the current cellular networks to become more heterogeneous, making signal-to-interference ratio (SIR) distribution difficult analyze. In this paper we propose a simple approximative approach SIR of heterogeneous (HCNs) based on ASAPPP method which stands ``approximate analysis Poisson point process'' and MISR (mean interference-to-signal ratio)-based gain each individual tier HCN. results demonstrate that gives tight approximation...

In millimeter-wave (mm-wave) cellular networks, high-gain beamforming, realized with directional antenna arrays, is typically adopted to mitigate the severe propagation loss. However, interference caused by such highly beams may, in turn, result a significant number of transmission failures, especially for dense networks. To tackle this problem, we propose two inter-cell coordination (ICIC) schemes mm-wave bands: one merely based on path loss incorporating blockage effect (PL-ICIC); other...

In this paper, we present an implementation of OFDM-based underwater acoustic communication transceiver. This transceiver combines the DSP board with a transducer and hydrophone as transmitter receiver, power amplifier to adjust various transmit power. We provide new method based on passband energy analysis for first-step preliminary signal detection avoid invalid trigger self-correlation detector, parabolic interpolation is proposed reduce complexity doppler shift compensation. Their...

The explosive growth of cellular network users and traffic stimulates the current architecture to be more spectral-, energy-, operation efficient flexible. In this paper, we propose a transformium comprising core, body cloud, where core dynamically schedules cloud orchestrated with wireless environment. To enable transforming ability, some new emerging technologies, including software defined networking, virtualization are employed in proposed architecture. As consequence, transforimium is...

The information freshness, quantified by the emerging idea of Age Information (AoI), has recently received widespread attentions from both academia and industry. However, most prior works on AoI considered a single source-destination pair provided performance analysis merely through queueing-theoretic models, which do not lend themselves to large-scale wireless networks. This paper focuses in setting using random spatial models stochastic geometry. Specifically, we first adopt rateless...

To alleviate the time overhead of handover and beam reselection caused by user mobility, a velocity-based association policy has been adopted in heterogeneous networks. However, it might introduce severe interference from cross-tier interfering base stations which are closer to users than serving one. deal with this problem, we propose two coordination (CTIC) schemes for mobile networks: one jointly considers transmit power path loss (TPL-CTIC), other further incorporates directional antenna...