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Identification and Acknowledgment of Programmed Traffic Sign Utilizing Profound Convolutional Neural Organization

Intelligent Automation & Soft Computing 2023年第2期35卷 1527-1543页

作者： P.Vigneshwaran N.Prasath M.Islabudeen A.Arunand A.K.Sampath Department of Networking and Communications SRM Institute of Science and TechnologyKattankulathurChennai603203India Department of Computer Science and Engineering School of EngineeringPresidency UniversityBengaluru560064India

Trafﬁc signs are basic security workplaces making the rounds,which expects a huge part in coordinating busy time gridlock direct,ensuring the pros-perity of the road and dealing with the smooth segment of vehicles and indivi-duals by walking,*** a segment of the clever transportation structure,the acknowledgment of trafﬁc signs is basic for the driving assistance system,trafﬁc sign upkeep,self-administering driving,and various *** are different assessments turns out achieved for trafﬁc sign acknowledgment in the ***,most of the works are only for explicit arrangements of trafﬁc signs,for example,beyond what many would consider a possible ***ﬁc sign recognizable proof is generally seen as trying on account of various complexities,for example,extended establishments of trafﬁc sign *** critical issues exist during the time spent identiﬁcation(ID)and afﬁrmation of trafﬁc *** signs are occasionally blocked not entirely by various vehicles and various articles are accessible in busy time gridlock scenes which make the signed acknowledgment hard and walkers,various vehicles,constructions,and loads up may frustrate the ID structure by plans like that of road *** concealing information from trafﬁc scene pictures is affected by moving light achieved by environment conditions,time(day-night),and ***ﬁc sign revelation and afﬁrmation structure has two guideline sorts out:The essential stage incorpo-rates the trafﬁc sign limitation and the resulting stage portrays the perceived trafﬁc signs into a particular class.

关键词： Trafﬁc sign classiﬁer convolution neural network image vehicle

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A survey on sensor localization

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控制理论与应用（英文版） 2010年第1期8卷 2-11页

作者： Jing WANG R. K. GHOSH Sajal K. DAS Center for Research in Wireless Mobility and Networking (CReWMaN) Department of Computer Science and Engineering University of Texas at Arlington Arlington TX 76019 USA Department of Computer Science and Engineering Indian Institute of Technology Kanpur India 208016

Localization is one of the fundamental problems in wireless sensor networks （WSNs）, since locations of the sensor nodes are critical to both network operations and most application level tasks. Although the GPS based localization schemes can be used to determine node locations within a few meters, the cost of GPS devices and non-availability of GPS signals in confined environments prevent their use in large scale sensor networks. There exists an extensive body of research that aims at obtaining locations as well as spatial relations of nodes in WSNs without requiring specialized hardware and/or employing only a limited number of anchors that are aware of their own locations. In this paper, we present a comprehensive survey on sensor localization in WSNs covering motivations, problem formulations, solution approaches and performance summary. Future research issues will also be discussed.

关键词： Sensor localization Wireless sensor networks Range measurements Anchors Mobile sensor Proba-bilistic localization

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IRS-enabled NOMA communication systems:A network architecture primer with future trends and challenges

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Digital Communications and Networks 2024年第5期10卷 1503-1528页

作者： Haleema Sadia Ahmad Kamal Hassan Ziaul Haq Abbas Ghulam Abbas Muhammad Waqas Zhu Han Faculty of Electrical Engineering and Telecommunications and Networking(TeleCoN)Research Center Ghulam Ishaq Khan Institute of Engineering and Technology(GIKI)Topi 23640Pakistan Faculty of Computer Science and Engineering GIKITopi 23640Pakistan Department of Computer Engineering College of Information TechnologyUniversity of Bahrain32028Bahrain School of Engineering Edith Cowan UniversityPerth WA6027Australia Department of Electrical and Computer Engineering University of HoustonHoustonTX 77004USA Department of Computer Science and Engineering Kyung Hee UniversitySeoul 446-701South Korea

Non-Orthogonal Multiple Access(NOMA)has already proven to be an effective multiple access scheme for5th Generation(5G)wireless *** provides improved performance in terms of system throughput,spectral efficiency,fairness,and energy efficiency(EE).However,in conventional NOMA networks,performance degradation still exists because of the stochastic behavior of wireless *** combat this challenge,the concept of Intelligent Reflecting Surface(IRS)has risen to prominence as a low-cost intelligent solution for Beyond 5G(B5G)*** this paper,a modeling primer based on the integration of these two cutting-edge technologies,i.e.,IRS and NOMA,for B5G wireless networks is *** in-depth comparative analysis of IRS-assisted Power Domain(PD)-NOMA networks is provided through 3-fold ***,a primer is presented on the system architecture of IRS-enabled multiple-configuration PD-NOMA systems,and parallels are drawn with conventional network configurations,i.e.,conventional NOMA,Orthogonal Multiple Access(OMA),and IRS-assisted OMA *** by this,a comparative analysis of these network configurations is showcased in terms of significant performance metrics,namely,individual users'achievable rate,sum rate,ergodic rate,EE,and outage ***,for multi-antenna IRS-enabled NOMA networks,we exploit the active Beamforming(BF)technique by employing a greedy algorithm using a state-of-the-art branch-reduceand-bound(BRB)*** optimality of the BRB algorithm is presented by comparing it with benchmark BF techniques,i.e.,minimum-mean-square-error,zero-forcing-BF,and ***,we present an outlook on future envisioned NOMA networks,aided by IRSs,i.e.,with a variety of potential applications for 6G wireless *** work presents a generic performance assessment toolkit for wireless networks,focusing on IRS-assisted NOMA *** comparative analysis provides a solid foundation for the dev

关键词： Intelligent reflecting surface Non-orthogonal multiple access 6G Beamforming Sum rate Energy efficiency

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Call admission control in wireless multimedia networks

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IEEE SIGNAL PROCESSING MAGAZINE 2004年第5期21卷 51-58页

作者： Rao, RM Comaniciu, C Lakshman, TV Poor, HV Rochester Institute of Technology Rochester NY US Department of Electrical and Computer engineering Stevens Institute of Technology High-Speed Networking Research Department Bell Laboratories Princeton University

Call admission control (CAC) is a mechanism used in networks to administer quality of service (QoS). Whereas the CAC problem in time-division multiple access (TDMA)-based cellular networks is simply related to the number of physical channels available in the network, it is strongly related to the physical layer performance in code-division multiple access (CDMA) networks since the multi-access interference in them is a function of the number of users and is a limiting factor in ensuring QoS. In this article, the CAC issues in multimedia DS-CDMA systems are reviewed by illustrating the basic principles underlying various schemes that have been proposed progressively from the simplest to the complex. The article also introduces SIR as a measure of QoS and describes the relatively simple schemes to administer CAC. The expression for SIR resulting from linear minimum mean-squared error processing is also presented. This article illustrates how CAC for multiple class service can be casted into an optimality framework and then discuss the recent work addressing self-similar multiple access interference.

关键词： Intelligent networks Multiaccess communication Call admission control Quality of service Physical layer Interference Road transportation Delay Limiting Bandwidth

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A Novel Smart Forwarding Scheme in LTE-Advanced Networks

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China Communications 2015年第3期12卷 120-131页

作者： CHEN Jengyueng YANG Chunchuan MAI Yiting Department of Information Networking Technology Hsiuping University of Science & Technology Department of Computer Science and Information Engineering National Chi Nan University Department of Sport Management National Taiwan University of Sport

Long Term Evolution(LTE) and IEEE 802.16 WiMAX are competing access network technologies adopted in 4G wireless networks in recent *** complies with3 GPP standards whereas 802.16 WiMAX is regulated by the Institute of Electrical and Electronics Engineers(IEEE).Although WiMAX is already operating commercially in Taiwan,the system is limited to an independent new system that is incompatible with the current 3G ***,the cost of implementing the WiMAX system is relatively high,this being an impediment to its rapid uptake and widespread *** the other hand,LTE conforms to 3GPP that is supported by telecommunication manufacturers and operators and is,moreover,backward compatible with 3G/UMTS cellular *** LTE specifications define how user equipment(UE) connects and communicates with evolved Node B(eNB) base *** enhanced version,LTE-Advanced,adds a new entity called the relay node(RN) to widen service coverage,although this change has resulted in a more complex *** management and data forwarding are essential components in wireless mobile *** paper focuses on the efficient handover procedure in LTE-Advanced networks,and proposes a Smart Forwarding mechanism to improve the handover *** studies show that the proposed Smart Forwarding scheme employs a better operational transmission path that effectively reduces handover latency and signal overhead.

关键词： 4G LTE LTE-Advanced Relay Handover

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Distributed link adaptation for multicast traffic in MIMO-OFDM systems

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Physical Communication 2011年第4期4卷 286-295页

作者： Yun, Sungho Caramanis, Constantine Heath, Robert W. Wireless Networking and Communications Group Department of Electrical and Computer Engineering The University of Texas at Austin Austin TX 78712-0240 United States

Multicast traffic exploits the broadcast nature of the wireless medium to deliver the same data to multiple users improving the bandwidth efficiency. Link adaptation can be used in multicast transmission to further increase data rates exploiting feedback from the users. However, it is not easy to have the quality of service (QoS) of every intended receiver met while pushing the data rate to the link capacity. Due to this difficulty, the conventional approach is to transmit isotropically with a fixed basic rate giving up the opportunity of increased throughput. For point-to-point unicast traffic, machine learning algorithms have recently found successful application in link adaptation due to their flexibility and ability to capture more environmental effects implicitly than classical adaptation algorithms. In this paper, we propose a machine learning based distributed algorithm for link adaptation for multicast traffic in multiple-input multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM) systems. Our computations show that the data driven approach for link adaptation provides good prediction of the optimal modulation and coding scheme (MCS) outperforming the fixed MCS policies collectively. The distributed algorithm using dual decomposition reduces the required feedback amount significantly while maintaining the near-optimal throughput performance. © 2011.

关键词： MIMO systems

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Reliability-based hybrid ARQ for partial-time jamming channels

Reliability-based hybrid ARQ for partial-time jamming channe...

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MILCOM 2004 - 2004 IEEE Military Communications Conference

作者： Roongta, Abhinav Moon, Jang-Wook Shea, John M. Wireless Information Networking Group Department of Electrical and Computer Engineering University of Florida

In this paper, we consider the use of selective-retransmission ARQ protocols to improve communication performance on partial-time jamming channels. The schemes that we propose are based on reliability-based hybrid ARQ (RB-HARQ), in which the set of bits to be retransmitted is adaptively selected based on the estimated a posteriori probabilities at the output of a soft-input, soft-output decoder. For channels with partial-time jamming, we can extend our measure of reliability to incorporate not only a posteriori probability information but also estimates of the probability that a bit was jammed. We compare the performance of the proposed scheme with that of a conventional approach in which a predetermined set of bits is retransmitted in response to a packet failure. The results show that RB-HARQ schemes can achieve better performance than the conventional approach. ©2004 IEEE.

关键词： Communication channels (information theory)

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Recent advances and future challenges for mobile network virtualization

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Science China(Information Sciences) 2017年第4期60卷 5-16页

作者： Xiaofeng TAO Yan HAN Xiaodong XU Ping ZHANG Victor C.M.LEUNG National Engineering Lab for Mobile Network Technologies Beijing University of Posts and Telecommunications State Key Lab of Networking & Switching Technology Beijing University of Posts and Telecommunications Department of Electrical and Computer Engineering The University of British Columbia

Recently, network function virtualization(NFV) was proposed as a paradigm shift in the telecommunication industry. Both industry and academia have drawn significant attention in mobile network *** decouples the software implementation of network functions from the underlying hardware, leading to considerable reductions in operating expenses(OPEX) and capital expenses(CAPEX), and facilitating the network deployment. However, as an emerging technology, NFV brings both challenges and opportunities in developing new architectures, applying and deployment. In this paper, we first survey the related work of NFV, and then propose promising research directions in this area.

关键词： network function virtualization mobile networks software defined networking network functions 5G network slicing

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An adaptive contention control strategy for IEEE 802.15.4-based wireless sensor networks

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IEEE Transactions on Vehicular Technology 2009年第9期58卷 5164-5173页

作者： Tseng, Hsueh-Wen Pang, Ai-Chun Chen, Jenhui Kuo, Chin-Fu Department of Computer Science and Information Engineering National Taiwan University Taipei 106 Taiwan Graduate Institute of Networking and Multimedia Department of Computer Science and Information Engineering National Taiwan University Taipei 106 Taiwan Department of Computer Science and Information Engineering Chang Gung University Taoyuan 333 Taiwan Department of Computer Science and Information Engineering University of Kaohsiung Kaohsiung 811 Taiwan

The IEEE 802.15.4 standard is able to achieve low-power transmissions in low-rate and short-distance wireless personal area networks (WPANs). Due to the constitutional design of the sensor node and the transmission architecture (clientserver model), any data communication between two sensor nodes will involve the coordinator. One shortcoming of redundant channel-access steps will result in excessive contention overheads and, thus, the decrease of channel utilization. This paper proposes an adaptive contention control strategy (ACCS) to solve the problem of transmission efficiency in IEEE 802.15.4. ACCS can be implemented in the IEEE 802.15.4 medium access control (MAC) protocol standard adding no new message type. An analytic model and a simulation model are developed to evaluate the performance of IEEE 802.15.4 and ACCS. The simulation results demonstrate that the proposed scheme significantly improves the goodput, the average queuing delay, the average MAC delay, and the energy consumption. © 2009 IEEE.

关键词： Sensor nodes

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The Patchable Internet of Things

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IEEE SPECTRUM 2017年第11期54卷 30-35页

作者： Ray, Sandip Basak, Abhishek Bhunia, Swarup State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing China Department of Systems and Computer Engineering Carleton University Ottawa ON Canada

ON 21 OCTOBER OF LAST YEAR, a variety of major websites—including those of Twitter, PayPal, Spotify, Netflix, The New York Times, and The Wall Street Journal—stopped working. The cause was a distributed denial-of-service attack, not on these websites themselves but on the provider they and many others used to support the Domain Name System, or DNS, which translates the name of the site into its numerical address on the Internet. The DNS provider in this case was a company called Dyn, whose servers were barraged by so many fake requests for DNS lookups that they couldn’t answer the real ones.

关键词： Denial-of-service attack Social network services Internet of Things Websites computer hacking

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