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2012 International Conference on Web Information Systems and Mining, WISM 2012

作者： Wang, Haiyong Yang, Geng Xu, Jian Chen, Zhengyu Yang, Zhen Key Lab of Broadband Wireless Communication Sensor Network Technology of Ministry of Education Nanjing University of Post and Telecommunications Nanjing 210003 China College of Internet of Things Nanjing University of Posts and Telecommunications Nanjing 210003 China

ISBN: (纸本)9783642334689

Dissemination and update of the code image plays an important role in application of the Internet of Things (IoT). As a part of the IoT, wireless sensor networks should provide the code dissemination. The commonly used method for periodical broadcasting metadata packages to determine whether code dissemination is needed consumes excessive energy. So a low energy consumption code dissemination protocol is proposed for this issue. That is whether code dissemination is necessary can be determined when the sensor node is under normal communication. The simulation result shows that the proposal in this article has reduced the energy consumption when the network needs code dissemination. © Springer-Verlag Berlin Heidelberg 2012.

关键词： Metadata

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A novel neural network optimized by quantum genetic algorithm for signal detection in MIMO-OFDM systems

A novel neural network optimized by quantum genetic algorith...

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IEEE Symposium on Computational Intelligence in Control and Automation

作者： Li, Fei Zhou, Min Li, Haibo Institute of Signal Processing and Transmission Key Lab. of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Nanjing China Department of Applied Physics and Electronics Umeå University Umeå Sweden

ISBN: (纸本)9781424499038

Neural networks can easily fall into a local extremum and have slow convergence rate. Quantum Genetic Algorithm (QGA) has features of small population size and fast convergence. Based on the investigation of QGA, we propose a novel neural network model, Radial Basis Function (RBF) networks optimized by Quantum Genetic Algorithm (QGA-RBF model). Then we investigate the performance of the proposed QGA-RBF on solving MIMO-OFDM signal detection problem. A novel signal detector based on QGA-RBF for MIMO-OFDM system is also proposed. The simulation results show that the proposed detector has more powerful properties in bit error rate than QGA based detector, RBF based detector and MMSE algorithm based detector, namely a 4-6 dB gain in performance can be achieved. The performance of the proposed detector is closer to optimal, compared with the other detectors. © 2011 IEEE.

关键词： Orthogonal frequency division multiplexing

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Spectral Efficient Resource Allocation Algorithm in Indoor Terahertz Downlink networks 13

Spectral Efficient Resource Allocation Algorithm in Indoor T...

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13th International Conference on wireless communications and Signal Processing, WCSP 2021

作者： Zhu, Fanshu Yan, Feng Shen, Fei Xia, Weiwei Hu, Jin Shen, Lianfeng Southeast University National Mobile Communications Research Laboratory Nanjing210096 China Shanghai Institute of Microsystemand and Information Technology Chinese Academy of Sciences Key Lab of Wireless Sensor Network and Communication Shanghai200050 China

ISBN: (纸本)9781665407854

Terahertz (THz) communication has become one of the high-profile technologies in the sixth generation (6G) mobile communication networks due to its huge bandwidth and ultra-high data transmission rate. In this paper, the resource allocation algorithm for indoor THz networks is investigated and a problem is formulated to maximize the spectral efficiency (SE). The optimization problem is decomposed into two sub-problems including sub-band allocation problem and power allocation problem. In the first stage, the sub-band allocation problem is solved using Hungarian algorithm based on the Long-User-Central-Window (LUCW) principle. In the second stage, the sequential quadratic programming (SQP) algorithm is used to obtain the optimal power allocation. Finally, simulation results show that the proposed algorithm has higher SE comparing with some conventional schemes. © 2021 IEEE.

关键词： Spectrum efficiency

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Energy-optimized 5G dual connectivity radio resource allocation 2

Energy-optimized 5G dual connectivity radio resource allocat...

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2nd IEEE International Conference on Electronics technology, ICET 2019

作者： Ying, Guo Qingmin, Meng Xiaoming, Wang Ministry of Education College of Telecommunications Information Engineering Key Laboratory of Broadband Wireless Communication and Sensor Network Technology Nanjing210003 China National Mobile Communications Research Lab Southeast University Nanjing210096 China

ISBN: (纸本)9781728116181

Non-independent networking of 5G NSA (Non-Standalone) is receiving wide attention. This paper considers an NSA architecture in which a 4G base station is used as the primary station and a newly deployed 5G base station is used as the secondary station. Machine-type communication and vehicle networking applications place stringent requirements on end-to-end delay of 5G NSA like systems. Due to limited computing power, part of the terminal data needs to be uploaded to the edge cloud to perform intensive calculations. An optimized radio resource allocation scheme is proposed for dual connectivity transmission under 5G NSA. Second, the relevant handover strategies are also evaluated. Computer simulation results show that compared with single-connection transmission, dual-connection transmission can significantly improve the energy consumption performance of the transmission scheme under a time delay constraint. © 2019 IEEE.

关键词： Mobile edge computing

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Feedback free distributed video coding rate control algorithm

Feedback free distributed video coding rate control algorith...

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International Conference on Information technology and Computer Application Engineering, ITCAE 2014

作者： Zhang, Deng Yin Ma, Teng Sci-tech Park of Internet of Things Nanjing University of Posts and Telecommunication Nanjing China Key Lab of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunication Ministry of Education Nanjing China

ISBN: (纸本)9781138027176

In this paper, based on the feedback free distributed video coding system, a rate control algorithm was proposed for Wyner-Ziv frames. First, calculate the maximum correlation of coefficient band level between the source WZ frames and adjacent key frames in DCT domain, and the quantization matrix was determined based on maximum correlation and the QP of the key-frames;then, according to the generated low-complexity side information and source WZ frame with DCT transformation and quantization, allocate the bit plane rate. Experimental results show, compared with the existing rate control algorithm without feedback channel, the proposed algorithm can effectively improve the Rate-Distortion performance of the feedback free system with little additional complexity. © 2015 Taylor & Francis Group, London.

关键词： Feedback

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An all dynamic MAC protocol for wireless Body Area network

An all dynamic MAC protocol for Wireless Body Area Network

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11th International Conference on wireless communications, networking and Mobile Computing (WiCOM 2015)

作者： Jun Wang Yutian Xie Qiong Yi Key Lab of Broadband Wireless Communication and Sensor Network Technology NJUPT Nanjing Jiangsu China

ISBN: (纸本)9781510821279

wireless Body Area network (WBAN) is considered as a special type of WSN. It consists of low-power wireless sensor nodes, which are placed on or implanted in the body for continuous health monitoring. MAC protocol is responsible for conflict detection, processing, priority control, timeslot assignment, transmission order etc. So the design of MAC protocol plays an important role in the reliability and efficiency of WBAN. In order to increase the energy efficiency and reliability of WBAN, a new wireless body area network MAC protocol-AD-MAC protocol is proposed. The proposed protocol adopts dynamic priority control, dynamic timeslot allocation mechanism and dynamic length allocation mechanism of different access periods to achieve reliable transmission in the situation of low latency and low power consumption. The simulation results show that AD-MAC protocol is superior to IEEE802.15.6 MAC and CA-MAC in terms of throughput, power consumption and delay.

关键词： Energy-Efficiency IEEE802.15.6 wireless Body Area network body area networks MAC protocol Methotrexate-Actinomycin-Chlorambucil Regimen Energy efficiency wireless dynamic priority conflict detection

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Performance analysis of data aggregation algorithms in wireless sensor networks

Performance analysis of data aggregation algorithms in wirel...

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2nd Annual Conference on Electrical and Control Engineering, ICECE 2011

作者： Xu, Jian Yang, Geng Chen, Zheng-Yu Chen, Lei Yang, Zhen College of Computer Science and Technology Nanjing University of Posts and Telecommunications Nanjing 210003 Jiangsu China Key Lab of Broadband Wireless Communication and Sensor Network Technology Ministry of Education Nanjing University of Posts and Telecommunications Nanjing 210003 Jiangsu China

ISBN: (纸本)9781424481637

Resource-constrained is a critical issue in wireless sensor networks (WSN) applications. Data aggregation (or data fusion) is one of the key techniques to solve the problem. Data aggregation can effectively reduce the data traffic, thereby reduce energy consumption, and extend the network's survival time. The research of data aggregation relates to many aspects of technology, so that the design of efficient data aggregation algorithm is a challenging task. In this paper, we investigate the effect of essential operations, scheduling algorithm and aggregation tree construction, has on data aggregation performance. The main performance such as end-to-end delay and energy-consumption of different aggregation schemes has been studied and measured by simulation experiment. © 2011 IEEE.

关键词： Scheduling algorithms

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Measurement-based entanglement purification for entangled coherent states

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Frontiers of physics 2022年第2期17卷 71-81页

作者： Pei-Shun Yan Lan Zhou Wei Zhong Yu-Bo Sheng Institute of Quantum Information and Technology Nanjing University of Posts and TelecommunicationsNanjing 210003China School of Science Nanjing University of Posts and TelecommunicationsNanjing 210003China Institute of Signal Processing Transmission Nanjing University of Posts and TelecommunicationsNanjing 210003China Key Lab of Broadband Wireless Communication and Sensor Network Technology Ministry of EducationNanjing University of Posts and TelecommunicationsNanjing 210003China

The entangled coherent states(ECSs)have been widely used to realize quantum information processing ***,the ECSs may suffer from photon loss and decoherence due to the inherent noise in quantum channel,which may degrade the fidelity of *** overcome these obstacles,we present a measurement-based entanglement purification protocol(MBEPP)for ECSs to distill some highquality ECSs from a large number of low-quality *** first show the principle of this MBEPP without considering the photon *** that,we prove that this MBEPP is feasible to correct the error resulted from the photon ***,this MBEPP only requires to operate the Bell state measurement without performing local two-qubit gates on the noisy pairs and the purified high-quality ECSs can be preserved for other *** MBEPP may have application potential in the implementation of long-distance quantum communication.

关键词： measurement-based entanglement purification entangled coherent state photon loss decoherence

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A new side information estimate based Distributed Video Coding algorithm for wireless multimedia sensor networks

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International Journal of Advancements in Computing technology 2012年第1期4卷 320-326页

作者： Xiao, Fu Liu, Jinkai Sun, Lijuan Wang, Ruchuan Nanjing University of Posts and Telecommunications China Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks China Key Lab of Broadband Wireless Communication and Sensor Network Technology Ministry of Education China

Video compression can reduce the amount of data information for wireless multimedia sensor networks(WMSNs). Compared with the traditional video coding algorithms, big gap existed in coding performance for Distributed Video Coding (DVC). In order to improve the efficiency of side information estimation, a novel hash-based side information estimation algorithm is proposed in this paper. For the regions of the Wyner-Ziv frame which cannot coding and decoding accurately, Discrete Cosine Transform (DCT) low-frequency coefficients of DCT is extracted according to the criteria of ROI for entropy coding. Then decoded DCT low-frequency coefficients for bidirectional hash motion estimation is utilized by decoder, which enables the decoder to choose between past and future reference frames for frame interpolation to generate best side information. Experimental results show that our proposed algorithm can gain more accurate motion estimation in the intense motion region. The algorithm can also reduce the rate, improve the quality of decoded image, and decrease the energy consumption of sensor nodes ultimately, which is important for WMSNs.

关键词： Discrete cosine transforms

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Social Awareness-Based Collaboration Interferes with Physical Layer Secure communication 13

Social Awareness-Based Collaboration Interferes with Physica...

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13th International Conference on wireless communications and Signal Processing, WCSP 2021

作者： Zhang, Teng Wei, Cun Wang, Jun Wang, Lei Key Lab of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Ministry of Education Nanjing210003 China Nanjing University of Posts and Telecommunications School of Geographic and Biologic Information Nanjing210003 China

ISBN: (纸本)9781665407854

This paper proposes a social-aware cooperative interference strategy for physical layer security, which not only considers the physical characteristics of the devices, but also considers the social relationship among users, and combines the two to increase the confidentiality capacity of the communication network. This paper studies the security issue of a multi-user communication network in the existence of eavesdropper and the source node with the help of cooperative interference node. To be specific, we define a trust value for each node to indicate the social relations and network interactivity between nodes. This paper proposes a two-layer network cooperative interference system model, by constructing the utility function of the main channel and the utility function of the eavesdropping channel, and the goal of maximizing the utility function of the entire network is proposed. The problem can be described as a one-to-one matching game, and the simulation results display that this scheme can obtain a higher confidentiality rate compared with the existing scheme. © 2021 IEEE.

关键词： Cooperative communication

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