Caching popular multimedia content is a promising way to unleash the ultimate potential of wireless networks. In this paper, we propose and analyze cache-based delivery in three-tier heterogeneous network (HetNet), where base stations (BSs), relays, device-to-device (D2D) pairs are included. We advocate proactively caching relays parts users with ability when off-peak. The cached can be reused for frequent access offload cellular traffic. node locations first modeled as mutually independent...

In this paper, we study the probabilistic caching for an N-tier wireless heterogeneous network (HetNet) using stochastic geometry. A general and tractable expression of successful delivery probability (SDP) is first derived. We then optimize probabilities maximizing SDP in high signal-to-noise ratio regime. The problem proved to be convex solved efficiently. next establish interesting connection between HetNets single-tier networks. Unlike where optimal performance only depends on cache...

In this paper, we devise the optimal caching placement to maximize offloading probability for a two-tier wireless system, where helpers and part of users have ability. The comes from local caching, D2D sharing helper transmission. particular, reformulate problem into difference convex (DC) which can be effectively solved by DC programming. Moreover, analyze two extreme cases there is only help-tier network user-tier. Specifically, helper-tier reduced problem, classical water-filling method....

Three-way decision model (3WDM) with decision-theoretical rough sets (DTRSs) always addresses precise cost parameters and attribute values in uncertain problem solving. However, intuitionistic fuzzy (IFSs), as extensions of sets, are described by dual parameters, namely the membership nonmembership degrees. Therefore, under environments, 3WDM confronted great challenges when number (IFN) IFN arise together. In this paper, considering impacts both values, new 3WDMs IFNs constructed from...

With ever growing mobile Internet and the explosion of its applications, users are experiencing abundant services from different content providers via network service in heterogeneous network. The information-centric (ICN) advocates getting rid current host-centric protocol because information dissemination rather than end-to-end communication contributes to majority today's traffic. Furthermore, it is better for entities converge as a whole order take advantage open, scalable, smart traffic...

The GaoFen-7 (GF-7) satellite, which was launched on November 3, 2019, is China's first civilian submeter stereo mapping satellite. satellite equipped with the laser altimeter officially in China for earth observation. Except altimeter, GF-7 spaceborne system also includes two footprint cameras and a optical axis surveillance camera. designed used to assist improving elevation accuracy without ground control points of line-array cameras. This article details design system, its ranging...

Storing the popular contents in caches to enable frequency reuse, wireless cooperative caching approach offers an exciting new way unleash ultimate potential of networks. In this paper, we formulate optimal problem minimize energy consumption network by considering some important constraints, including limited storage capacity, content popularity and access protocol. A sub-optimal strategy is then proposed handle placement caches, reducing consumption. Simulation results show that scheme has...

In this paper, we propose to exploit the limited cache packets as side information cancel incoming interference at receiver side. We consider a stochastic network where random locations of base stations and users are modeled using Poisson point processes. Caching schemes reap both local caching gain cancelation for developed based on two factors: densities different user subsets cached in corresponding subsets. The packet loss rate (PLR) is analyzed, which depends channel state available...

The triglyceride-glucose (TyG) index, a novel health indicator, has been widely employed to assess insulin resistance (IR). However, its relationship with fine particulate matter (PM) exposure remains inadequately investigated. This study endeavors probe the association between PM2.5 and TyG within population of eastern China determine whether there are disparities in this among diverse subgroups. We conducted an ecological on cohort comprising 39,011 individuals who had undergone at least...

A novel active frequency selective surface (AFSS), which transmits 2.45 GHz WLAN signals in the ON state and functions as a band-stop filter to shield those OFF state, was proposed this letter. special topology of AFSS array that required no additional biasing lines between two adjacent units applied weaken negative impact feeder network on FSS's transmission characteristics. The structure exhibited stable performances for different incident angles polarizations. prototype fabricated...

Instead of assuming fully loaded cells in the analysis on cache-enabled networks with tools stochastic geometry, we focus dynamic traffic this letter. With modeling dynamics request arrivals and departures, probabilities full-, free-, modest-load large-scale network are elaborated based queue state. Moreover, propose to exploit packets cached at users as side information cancel incoming interference. Then, packet loss rates for both cache-untenable investigated. The simulation results verify...

Pushing and caching the popular multimedia data is a promising way to unleash ultimate potential of wireless networks. In this paper, we contribute proposing analyzing push-based cache-based content delivery in three-tier heterogeneous network, where base stations, relays device-to-device (D2D) pairs are included. We propose proactively push contents parts users with ability via broadcasting when network off-peak. The cached can be reused for frequent access offload cellular traffic. node...

In this paper, we consider the stochastic network with dynamic traffic. The spatial distribution of access points (APs) and users are modeled as mutually independent Poisson point processes. Different from most previous literature works, which assume that all APs fully loaded, fact having no data to transmit do not generate interference users. opportunistically share channel according existence packet be transmitted proposed suppression strategy. region, only one AP can active at a time on...

ABSTRACT In this letter, a simple design method for reconfigurable active frequency selective surface (AFSS) and novel switchable AFSS is presented, which the can transmit LTE 2.1 GHz signals in PIN‐OFF state while function as band‐stop filter to shield those PIN‐ON state. Compared with regular square loop AFSS, proposed structure exhibited fair stability different incident angles much smaller −10 dB bandwidth of | S 21 reflection reasonable insertion loss transmission By changing DC voltage...

Recently, an increasing number of companies have begun to deploy their application services in the cloud. However, cloud data centre downtime has negatively affected quality service. Many researchers studied problem service reliability assurance. there is a shortage tools that enable evaluate newly proposed enhancement mechanisms. To fill this gap, paper, we propose FTCloudSim as reliable simulation system based on basic functionalities CloudSim. provides extensible interface help implement...

Pushing and caching the popular multimedia data can effectively reduce redundant content transmission cope with explosive traffic growth. In this paper, we contribute to analyzing push-based cache-based delivery in heterogeneous network (HetNet). When load is off-peak, most contents be pushed relays cache-enabled users via broadcasting, then cached down reused for frequent access. The locations of base stations, device-to-device pairs are first modeled as mutually independent Poisson Point...

In this paper, we propose an opportunistic cooperation scheme in a two-user buffer-aided cognitive radio network. each time slot, the secondary user (SU) will either transmit its own packets, or help primary to forward based on priority factor α. According previous schemes, some slots be wasted if selected buffer is empty. However, under proposed scheme, these handed over nonempty buffer's transmission, which increases average service rates of buffers at SU. Considering bursty nature...

Intuitionistic fuzzy sets, as extensions of are described by intuitionistic numbers (IFNs) that describe the uncertain concepts with membership and non-membership degrees together. Three-way decisions effective classification methods, which always utilized for solving problems fixed cost parameter values attribute in reality. However, under dynamic environments, three-way face a great challenge processing IFN parameters values. In this paper, considering impact IFNs, hierarchical decision...

A stepped‐impedance circular ring resonator (SICRR) with two pairs of stubs is proposed for the design a dual‐bandpass filter. This quad‐mode applied to produce passbands. It found that centre frequencies and bandwidths passbands can be tuned by varying lengths stubs. Simulation results show defined impedance ratio K electrical length α between SICRR segments affect frequency separation prototype filter centred at 3.4 5.56 GHz designed fabricated. Good agreement simulated measured was achieved

In this paper, we study the probabilistic caching for an $N$-tier wireless heterogeneous network (HetNet) using stochastic geometry. A general and tractable expression of successful delivery probability (SDP) is first derived. We then optimize probabilities maximizing SDP in high signal-to-noise ratio (SNR) regime. The problem proved to be convex solved efficiently. next establish interesting connection between HetNets single-tier networks. Unlike where optimal performance only depends on...

In this paper, the downlink outage performance of full-duplex (FD) multi-cell networks considering interference cancellation at receivers is investigated. Different from previous FD cellular works, where all assumed to be perfectly cancelled, we propose concept strong region distinguish and weak interference. A practical scheme proposed suppress Instead assuming full-loaded cells in analysis on networks, consider dynamic traffic request users stochastic may not always actively transmit...

We consider a cache- and SIC-enabled wireless network, where the locations of base stations (BSs) users are modeled by Poisson point process cluster process, respectively. The BS serves two simultaneously transmitting superimposed signal, each user employs joint scheme cache-assisted interference cancellation (CAIC) successive (SIC). Each is classified as caching or non-caching depending on whether not it caches data sent to its interferer in same cell. receiver operation into three possible...

A novel frequency selective radome (FSR), which is "transparent" within the operating band of antenna while absorbing out-of-band incoming waves in a very wide band, presented this article. In order to absorb undesired signals out square loops loaded with lumped resistors are used. The pass-band property realized by employing meandering slots smaller period enhance stability under large incident angles. equivalent circuit method introduced explain working principles FSR and verify full-wave...