Mobile power sources (MPSs), including electric vehicle fleets, truck-mounted mobile energy storage systems, and emergency generators, have great potential to enhance distribution system (DS) resilience against extreme weather events. However, their dispatch is not well investigated. This paper implements resilient routing scheduling of MPSs via a two-stage framework. In the first stage, i.e., before event, are pre-positioned in DS enable rapid pre-restoration, order survivability...

Grant-free non-orthogonal multiple access (GF-NOMA) is a potential technique to support massive Ultra-Reliable and Low-Latency Communication (mURLLC) service. However, the dynamic resource configuration in GF-NOMA systems challenging due random traffics collisions, that are unknown at base station (BS). Meanwhile, joint consideration of latency reliability requirements makes for mURLLC more complex. To address this problem, we develop novel learning framework signature-based service taking...

Attracting increasing attention in recent years, the Free Space Optics (FSO) technology has been recognized as a cost-effective wireless access for multi-Gigabit rate networks. Radio on (RoFSO) provides new approach to support various bandwidth-intensive services an optical link. In RoFSO system using wavelength-division multiplexing (WDM), it is possible concurrently transmit multiple data streams consisting of at very high rate. this paper, we investigate problem power allocation under...

Fifth Generation (5G) New Radio (NR) does not support data transmission during random access (RA) procedures, which results in unnecessary control signalling overhead and power consumption, especially for small (SDT). Motivated by this, 3GPP has proposed 4/2-step SDT RA schemes based on the existing grant-based (4-step) grant-free (2-step) schemes, with aim to enable procedures Resource Control (RRC) Inactive state. To compare benchmark we provide a spatio-temporal analytical framework...

To guarantee the safety and smooth control of Unmanned Aerial Vehicle (UAV) operation, new command (C&C) data type imposes stringent quality service (QoS) requirements on cellular network. However, existing bit-oriented communication framework is already approaching Shannon capacity limit, which can hardly ultra-reliable low latency communications (URLLC) for C&C transmission. solve problem, task-oriented semantics-aware (TOSA) has been proposed recently by jointly exploiting context its...

Proportional fair scheduling has attracted much attention and been well studied in the single-cell network scenario, where only one base station (BS) serves many users. However, for a user may obtain services from multiple BSs geographically located apart, not work done. In this paper, we investigate how to achieve proportional allocation of users' throughput wireless with A low-complexity algorithm is presented. We prove that developed approximately optimal sense maximizing global fairness...

Unmanned aerial vehicles (UAVs) play an increasingly important role in military, public, and civilian applications, where providing connectivity to UAVs is crucial for its real-time control, video streaming, data collection. Considering that cellular networks offer wide area, high speed, secure wireless connectivity, cellular-connected have been considered as appealing solution provide UAV with enhanced reliability, coverage, throughput, security. Due the nature of mobility, reliability...

The sixth-generation (6G) communication research is currently in the early stage, where ultra-reliable low-latency (URLLC) still an important service as fifth-generation (5G). Since 6G networks are expected to provide even higher levels of massive connectivity, high spectrum efficiency, reliability, and low latency than 5G communication, it would confront much more severe scarcity problems, which make new radio unlicensed (NR-U) technology attractive. However, how achieve URLLC requirements...

Femtocells are recognized as effective for improving network coverage and capacity reducing power consumption due to the reduced range of wireless transmissions. Although highly appealing, a plethora challenging problems need be addressed fully harvesting its potential. In this paper, we investigate problem cell association service scheduling in femtocell networks. addition general goal offloading traffic from macrobase station (BS), also aim at minimizing latency requested by users, while...

Attracting increasing attention in recent years, the Free Space Optics (FSO) technology has been recognized as a cost-effective wireless access for multi-Gigabit rate networks. Radio over (RoFSO) provides promising enhancement to optical fiber systems. In an RoFSO system using wavelength-division multiplexing (WDM), it is possible concurrently transmit multiple data streams consisting of various services at very high rate. this paper, we develop power allocation schemes adaptive WDM...

A multiobjective optimization coverage control strategy is proposed for solving the contradictory problem among energy consumption, equilibrium of energy, and network in wireless sensor networks. new evolutionary algorithm named Multiobjective free search (MOFS) designed WSN based on fitness functions binary coding schemes. The used to estimate number active nodes because individual cannot have their working state information readily. Simulation shows that MOFS effective solve typical...

Although the technology of femtocells is highly promising, many challenging problems should be addressed before fully harvesting its potential. In this paper, we investigate problem cell association and handover management in femtocell networks. Two extreme cases for are first discussed analyzed. Then propose our algorithm to maximize network capacity while achieving fairness among users. Based on algorithm, further develop a reduce number unnecessary handovers using Bayesian estimation. The...

Cooperative diversity is considered as an effective means for combating weather turbulence in FSO networks. We investigate the problem of maximizing network-wide throughput under constraint a given power budget and number transceivers. The formulated Mixed Integer Nonlinear Programming (MINLP) problem. propose both centralized distributed algorithms using bipartite matching convex optimization to obtain highly competitive solutions. proposed are shown outperform non-cooperative scheme...

Cellular-connected unmanned aerial vehicle (UAV) swarm is a promising solution for diverse applications, including cargo delivery and traffic control. However, it still challenging to communicate with control the UAV high reliability, low latency, energy efficiency. In this paper, we propose two-phase command (C&C) transmission scheme in cellular-connected network, where ground base station (GBS) broadcasts common C&C message phase I. II, UAVs that have successfully decoded will relay rest...

This paper presents an improved TCP/active queue management (AQM) model and a novel AQM control system, called particle swarm optimization (PSO) proportional-integral-differential (PID) controller, under large-delay network situations. First, we present the including delay term ignored by previous simplified version. Using this model, next design router applying PSO to tune efficiently PID controller parameters. A simulation study shows that PSO-PID controls congestion effectively...

Bivalve shells have been used in a number of paleoclimate and paleoenvironment studies. In order to investigate oxygen carbon isotope fractionation between bivalve aragonite host water, one year monitoring experiment was conducted. Temperature, δ18OWATER δ13CDIC were measured every week from January 2006 2007. These data calculate expected δ18O δ13C equilibrium values compare shell values. At the end experiment, living bivalves (Corbicula fluminea) collected sampled for stable analysis...

A method based on S transforms and support vector machines was presented for fault diagnosis of power electronics circuits in which the transform time-frequency analysis signal is used to extract features corresponding various faults. Then, types are identified through pattern recognition classifier, SVM. The simulation results show that proposed can accurately diagnose faults locate elements circuits. It also has excellent performance noise robustness calculation complexity, thus, having...

Spectrum sensing is the premise of cognitive radio, which determines communication quality total system. For nodes far away from primary user, probability correct detecting drops clearly because great fading, no matter they spend more time sensing. Cooperation between relay can enlarge valid transmit distance and improve communication. This paper establishes three-node radio system to do optimization spectrum The forward received signal after doing In this condition, system's bit error ratio...

Free space optical (FSO) networking is an attractive technology with applications ranging from high capacity military communications to "Last-mile" broadband access solutions. Topology control important problem in FSO networks. The of building a spanning tree when number transceivers on each base station limited, networks, NP-hard. What makes the even more challenging maximize algebraic connectivity tree. In this paper, we develop initially configuring, or bootstrapping, algorithm which...

Abstract We present the results of a 3‐year monitoring programme stable isotope composition lake water and precipitation at Taozi Lake, in East Asian monsoon region China. Our aims were to reveal spatiotemporal pattern variation isotopes small closed‐basin quantitatively determine impacts evaporation on under humid climate. In time domain, oxygen isotopic ratio ( δ 18 O L ) exhibited substantial seasonal interannual variations, but variations between different events substantially exceeded...