Empowered by the optical orthogonal frequency-division multiplexing (O-OFDM) technology, flexible online service provisioning can be realized with dynamic routing, modulation, and spectrum assignment (RMSA). In this paper, we propose several algorithms that incorporate RMSA a hybrid single-/multi-path routing (HSMR) scheme. We investigate two types of HSMR schemes, namely using path computation (HSMR-OPC) fixed sets (HSMR-FPS). Moreover, for HSMR-FPS, analyze selection policies to optimize...

This article discusses the technologies for realizing highly efficient data migration and backup big applications in elastic optical inter-data-center (inter-DC) networks. We first describe impacts of on underlying network infrastructure introduce concept flexible-grid inter-DC Then we model such networks as dynamic anycast propose several algorithms. Joint resource defragmentation is also discussed to further improve performance. For backup, leverage a mutual investigate how avoid prolonged...

Advances in wireless communications are empowering the emerging Internet-of-Things (IoT) applications and services with billions of connected devices. Mobile-edge computing (MEC) has been proposed to reduce round-trip delay these as IoT devices may have limited resources resource-rich mobile cloud be far away. On other aspect, unmanned aerial vehicles (UAVs) potentially employed improve quality service channel conditions users. We thus propose utilize UAV a node well relay average user...

Mobile edge computing (MEC) is leveraged to reduce the latency for computation-intensive and latency-critical tasks offloaded from wireless devices Internet of Things Devices (IoTDs). Unmanned aerial vehicles (UAVs) have attracted much attention both academia industry attributed high mobility, flexibility, maneuverability UAVs. In this article, a novel UAV-assisted MEC architecture proposed provision services IoTDs, where UAV provides communication or works as relay node. We then formulate...

Abstract Aqueous Zn‐ion hybrid capacitors (ZIHCs) present prominent potentials in flexible wearable electronics application scenarios due to their inherent high safety and low cost. Simultaneously, volumetric energy density is one of the crucial parameters determine lifespan electronics, which lightweight miniaturization a cardinal prerequisite for realistic application. In this work, an aqueous ZIHC constructed by harmonizing interlayer spacing laminate graphene film solvation structure...

Emerging virtual reality ( <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">VR</i> ) applications require high data rate transmission and low end-to-end latency, which has become one of the main challenges for future wireless networks. Unmanned aerial vehicle xmlns:xlink="http://www.w3.org/1999/xlink">UAV</i> mounted base stations computing facilities can be used to provide better connectivity services edge VR users meet their needs reduce...

Drone base stations (DBSs) can potentially provision low-cost and flexible networking with high mobility while in-band full-duplex (IBFD) conceivably improve spectrum efficiency. Therefore, it is logical to employ DBSs IBFD in a cellular network the throughput. We decompose this problem into DBS placement joint bandwidth power allocation problem, propose two heuristic algorithms solve whole problem. Simulation results have demonstrated that total throughput of dynamic algorithm achieves up...

Elastic optical networks (EONs) play an important role for the next generation core networks, especially supporting cloud computing. However, network traffic has been growing exponentially and almost reached physical capacity limit of single-mode fibers. Space division multiplexing (SDM) can be potentially employed to increase fiber capacity. Multi-core fibers (MCFs) make use SDM aggregate multiple cores together into cladding one fiber, which greatly EONs but incurs new crosstalk...

Translucent networks utilize sparse placements of optical-electronic-optical (O/E/O) 3R (reamplification, reshaping, and retiming) regenerators to improve the cost effectiveness energy efficiency wavelength-routed optical transport networks. In this paper, we show that a translucent network can be further reduced by leveraging all-optical 2R (reamplification reshaping) regenerators. We propose infrastructure uses partially replace O/E/O implements mixed regenerator (MRP). first consider...

Drone-mounted base-stations (DBSs) characterized by high mobility and low cost intrinsic attributes can be deployed to enhance the network capacity in order relieve mismatch between large amount of user demands limited wireless resources. In this article, we propose a DBS-assisted in-band full-duplex (IBFD) HetNet framework for 5G networks. We then discuss problem heterogeneous networks (DBSH) with IBFD communications, which decomposed into three sub-problems: DBS placement problem, UE...

Unmanned aerial vehicles (UAVs) are playing a critical role in provisioning instant connectivity and computational needs of Internet Things Devices (IoTDs), especially crisis disaster management. In this work, we focus on optimizing trajectories UAVs along which IoTDs served with communication computing resources multiple time slots. The Quality Experience (QoE) an IoTD depends its latency performance; thus aim to maximize the average aggregate QoE all overall However, is nonconvex,...

Drone-mounted base-stations (DBSs) have attracted much attention because of their mobile, flexible and low-cost networking features. In-band full-duplex (IBFD) is a promising technology to potentially double the spectrum efficiency, thus equipping DBSs with IBFD provision services may increase throughput reduce number required for same coverage. We propose dynamic drone-base-station-placement algorithm solve 3-D DBS placement problem by incorporating IBFD-enabled communications both access...

In mobile access networks, different types of Internet Things (IoT) devices (e.g., sensor nodes and smartphones) generate vast traffic demands, thus dramatically increasing the loads their connected nodes, especially in 5G era. Considering possible congestion drone base stations (DBSs) can be flexibly deployed to hotspot areas as relays between IoT devices. As DBSs' batteries are limited while backhauls toward directly impact throughput downloading data, how improve flight time DBSs backhaul...

The future 5G network is expected to provide throughput 1000 times and spectrum efficiency 10 those of the current 4G network. In-band full-duplex (IBFD) a promising technique for that can conceivably improve efficiency. Drone-mounted base stations (DBSs) high mobility flexibility, leveraging DBSs provision services UEs facilitate quality service wireless enlarge coverage area. Therefore, be improved by IBFD-enabled DBSs. We formulate drone-mounted station placement with IBFD communications...

Open AccessCCS ChemistryRESEARCH ARTICLE14 Jul 2022Hydrogen-Bonding-Induced H-Aggregation of Charge-Transfer Complexes for Ultra-Efficient Second Near-Infrared Region Photothermal Conversion Jieqiong Xu†, Zhiwei Yin†, Liang Zhang, Qian Dong, Xinqi Cai, Shengkai Li, Chen, Phouphien Keoingthong, Zhaoqian Long Zhuo Chen and Weihong Tan Xu† Molecular Science Biomedicine Laboratory, State Key Laboratory Chemo/Biosensing Chemometrics, College Chemistry Chemical Engineering, Life Sciences, Hunan...

Drone-mounted base-station (DBS) can empower 5G and beyond networks with additional flexibility maneuverability, laser charging potentially extend the DBSs flight time. We propose a enabled DBS framework in which station on ground constantly transmits energy to quadrotor DBS, provides communications for all users. The is be intelligently placed optimal location provide service users each time slot. thus formulate joinT powEr bandwidth assignment, LasEr Charing enAbled placemenT (TELECAST)...

Datacenters (DCs), deployed in a large scale to support the ever increasing demand for data processing applications, consume tremendous energy. Powering DCs with renewable energy can effectively reduce brown consumption. Owing geographically distributed deployment of DCs, generation and demands usually vary different DCs. Migrating virtual machines (VMs) among according availability helps match thus maximizes utilization We first elicit energy-aware inter-datacenter (inter-DC) VM migration...

Drone-mounted base stations (DBSs) are promising means to provide ubiquitous connections users and support various emerging applications in mobile networks while full duplex communications has the potential improve spectrum efficiency. In this paper, we investigate backhaul-aware uplink a full-duplex DBS-aided HetNet (BUD) problem with objective maximize total throughput of network minimizing number deployed DBSs. Since BUD is NP-hard, it then decomposed into three sub-problems: joint UE...

Drone-mounted base-stations (DBSs) are promising complements and substitutes of the terrestrial base-stations. We investigate problem Placement cOmmunications in DBS-aided heterogeneous network (POD) with tier-1 backhaul using free space optics communications tier-2 utilizing in-band full-duplex to provide ubiquitous connections high spectrum efficiency. The POD is shown be NP-hard, thus we simplify by decomposing it into three sub-problems. Finally, propose an approximation algorithm solve...

Edge computing technology can effectively solve huge challenges posed by the large number of terminal devices accessing and massive data processing in digital distribution networks. Burst tasks, such as faults requests from cloud, occur at any time for edge These tasks are unpredictable usually hold highest priority must be completed soon possible. Although resources reserved partially each period pre-scheduled operation plan, they may still insufficient to handle burst adequately. A...

Abstract At present, the daily operation and maintenance of large-scale data centers such as banks in China, due to a variety reasons, often brings about problem unexpected events that are difficult locate. In order ensure systems running center work efficiently, this paper proposes method for improving operation, maintenance, monitoring financial based on cloud-native model. First, we sequentially cleanse process eliminate any negative impact generate time-trending correlation attributes....