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A Machine-Learning Based Time Constrained Resource Allocation Scheme for Vehicular Fog Computing

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China Communications 2019年第11期16卷 29-41页

作者： Xiaosha Chen supeng leng Ke Zhang Kai Xiong School of Information and Communication Engineering University of Electronic Science and Technology of China

Through integrating advanced communication and data processing technologies into smart vehicles and roadside infrastructures,the Intelligent Transportation System(ITS)has evolved as a promising paradigm for improving safety,efficiency of the transportation ***,the strict delay requirement of the safety-related applications is still a great challenge for the ITS,especially in dense traffic *** this paper,we introduce the metric called Perception-Reaction Time(PRT),which reflects the time consumption of safety-related applications and is closely related to road efficiency and *** the integration of the incorporating information-centric networking technology and the fog virtualization approach,we propose a novel fog resource scheduling mechanism to minimize the ***,we adopt a deep reinforcement learning approach to design an on-line optimal resource allocation *** results demonstrate that our proposed schemes is able to reduce about 70%of the RPT compared with the traditional approach.

关键词： deep reinforcement learning information-centric networking intelligent transport system perception-reaction time resource allocation vehicular fog

Service-Oriented Wireless Multimedia Multicasting with Partial Frequency Reuse

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Tsinghua Science and Technology 2016年第6期21卷 598-609页

作者： Quanxin Zhao Liang Xu Yuming Mao supeng leng Geyong Min Jia Hu Noushin Najjari the School of Communication and Information Engineering University of Electronic Science and Technology of China the College of Engineering Mathematics and Physical Sciences University of Exeter

Service-Oriented Architecture（SOA） is employed in a wide range of applications because it promises to expose computation-intensive tasks as services and combine them with new applications to accelerate their applications development process. For service-oriented multimedia applications, the performance of multicasting transmission services under multimedia traffic must be evaluated. Multiview Video（MVV） is a promising and emerging type of multimedia traffic that consists of multiple video streams, allows stream switching, and requires strict Quality-of-Service（Qo S）. In this study, we investigated multicast transmission of MVV in wireless cellular networks with Partial Frequency Reuse（PFR） and focused on two challenging problems：（1） multicast group formation and（2） subchannel and power allocation. Initially, we propose a novel Content-based Partial frequency reuse Diversity Grouping（CPDG） scheme to allocate users to multicast groups on the basis of Partial frequency reuse Diversity（PD） in wireless networks with PFR. After group formation, an optimization problem for subchannel and power allocation is formulated to minimize network power consumption under Qo S constraint. Thereafter,the optimization problem is divided into two subproblems and solved using simplex method and Karush-KuhnTucker（KKT） condition. Finally, to solve the optimization problem, a suboptimal scheme referred to as Partial frequency reuse Diversity Based Energy-efficient Multicasting（PDEM） is proposed by dynamically allocating wireless resources under Qo S constraint. The simulation results show that the proposed PDEM scheme can achieve close-to-optimal performance. Moreover, mathematical analysis of the effect of PD on network performance can provide guidelines for optimization of multimedia traffic in multicasting-enabled wireless cellular networks with PFR.

关键词： service-oriented multimedia multicast quality-of-service frequency reuse diversity

A Low-Overhead Energy-Efficient ARQ Protocol for Wireless Sensor Networks

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China Communications 2014年第10期11卷 74-87页

作者： WEI Yunkai MAO Yuming leng supeng HUANG Wentao School of Communication and Information Engineering University of Electronic Science and Technology ofChina Chengdu Sichuan 611731 P.R. China Electrical Engineering California Institute of Technology Pasadena 91125 USA

Wireless sensor network(WSN) is a typical kind of low-power and lossy network,in where ARQ(Automatic Repeat reQuest)schemes are often used to improve packets ***,the ARQ related packets may incur significant load and consume more *** paper proposes a novel energy efficient ARQ protocol called ARQ+,which uses the nearest-first scheme and NAK aggregation scheme to reduce the amount and transmission hops of the ARQ related ***,the energy consumption is significantly *** analyses of ARQ+ on energy consumption,packet arrive ratio and latency are *** improvement of ARQ+ is validated by extensive *** both show that ARQ+ has satisfactory energy efficiency,good packets arriving ratio and reasonable average packet delay comparing to traditional ARQ schemes.

关键词： ARQ ARQ+ wireless sensornetwork energy saving low overhead

Weakly Supervised Network with Scribble-Supervised and Edge-Mask for Road Extraction from High-Resolution Remote Sensing Images

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Computers, Materials & Continua 2024年第4期79卷 549-562页

作者： supeng Yu Fen Huang Chengcheng Fan College of Artificial Intelligence Nanjing Agricultural UniversityNanjing210095China Innovation Academy for Microsatellites of CAS Shanghai201210China Shanghai Engineering Center for Microsatellites Shanghai201210China Key Laboratory of Satellite Digital Technology Shanghai201210China

Significant advancements have been achieved in road surface extraction based on high-resolution remote sensingimage processing. Most current methods rely on fully supervised learning, which necessitates enormous humaneffort to label the image. Within this field, other research endeavors utilize weakly supervised methods. Theseapproaches aim to reduce the expenses associated with annotation by leveraging sparsely annotated data, such asscribbles. This paper presents a novel technique called a weakly supervised network using scribble-supervised andedge-mask (WSSE-net). This network is a three-branch network architecture, whereby each branch is equippedwith a distinct decoder module dedicated to road extraction tasks. One of the branches is dedicated to generatingedge masks using edge detection algorithms and optimizing road edge details. The other two branches supervise themodel’s training by employing scribble labels and spreading scribble information throughout the image. To addressthe historical flaw that created pseudo-labels that are not updated with network training, we use mixup to blendprediction results dynamically and continually update new pseudo-labels to steer network training. Our solutiondemonstrates efficient operation by simultaneously considering both edge-mask aid and dynamic pseudo-labelsupport. The studies are conducted on three separate road datasets, which consist primarily of high-resolutionremote-sensing satellite photos and drone images. The experimental findings suggest that our methodologyperforms better than advanced scribble-supervised approaches and specific traditional fully supervised methods.

关键词： Semantic segmentation road extraction weakly supervised learning scribble supervision remote sensing image

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一种自适应速率的UWB MAC协议

计算机工程与应用 2011年第1期47卷 109-112页

作者：周坚冷甦鹏电子科技大学通信与信息工程学院成都611731

在超宽带(UWB)通信中,跳时冲激无线电(TH-IR)技术具有系统结构简单、成本低、功率小等优点,得到广泛的研究及应用探索。基于TH-IR UWB技术,提出了一种能够保证链路误码率及传输速率的自适应速率跳时(Rate-Adaptive Time Hopping,RATH)... 详细信息

在超宽带(UWB)通信中,跳时冲激无线电(TH-IR)技术具有系统结构简单、成本低、功率小等优点,得到广泛的研究及应用探索。基于TH-IR UWB技术,提出了一种能够保证链路误码率及传输速率的自适应速率跳时(Rate-Adaptive Time Hopping,RATH)介质访问控制(MAC)协议,该协议利用跳时码管理多用户的信道访问,依据接收节点的信干比控制链路的建立,并采用自适应速率算法调节链路的传输速率。NS2平台下的仿真实验表明,与U-MAC等已有的固定速率协议相比较,RATH MAC协议能够使网络有效吞吐量和传输时延得到明显改善。

关键词：超宽带跳时冲激无线电自适应速率介质访问控制

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无线多跳网络GeoGRID协议研究

计算机工程与应用 2011年第25期47卷 100-103页

作者：马长青冷甦鹏电子科技大学通信与信息工程学院成都611731

Geocast是一种基于方向性投递的无线多播路由协议,能够减少冗余数据包,缩短多播时延。现有Geocast协议并不适用于稀疏网络环境,存在时延较大、数据冗余较高等缺陷。为了提高GeoGRID协议在稀疏网络中的性能,提出了GeoGRID-LBM和A-GeoGRI... 详细信息

Geocast是一种基于方向性投递的无线多播路由协议,能够减少冗余数据包,缩短多播时延。现有Geocast协议并不适用于稀疏网络环境,存在时延较大、数据冗余较高等缺陷。为了提高GeoGRID协议在稀疏网络中的性能,提出了GeoGRID-LBM和A-GeoGRID两种新型协议,利用网关节点掌握两跳网关节点邻居的信息,减少信道竞争和数据包碰撞概率,仿真实验表明,这两种改进型GeoGRID能够将数据端到端时延减少14%,降低冗余数据包数量达26%。

关键词：无线多跳网络多播 Geocast 网格

基于802.11的多信道MAC协议性能分析

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计算机研究与发展 2009年第10期46卷 1651-1659页

作者：毛建兵毛玉明冷甦鹏白翔电子科技大学通信抗干扰技术国家级重点实验室成都610054

为了改善无线网络中信道带宽的利用率,提高网络的吞吐量性能,已有研究提出了采用多信道MAC协议的方法,将单个信道分割成控制子信道和数据子信道进行联合使用.针对基于802.11DCF的该类型MAC协议,采用离散Markov链对DCF的退避机制进行建... 详细信息

为了改善无线网络中信道带宽的利用率,提高网络的吞吐量性能,已有研究提出了采用多信道MAC协议的方法,将单个信道分割成控制子信道和数据子信道进行联合使用.针对基于802.11DCF的该类型MAC协议,采用离散Markov链对DCF的退避机制进行建模分析,研究了多信道下两种MAC机制的饱和吞吐量性能与信道带宽分配比例的关系,分析了网络节点数、数据分组大小和DCF竞争窗口等对优化多信道带宽分配的影响,并将多信道MAC机制下的网络性能与单信道MAC机制进行了对比.分析和仿真结果表明,采用优化的信道带宽分配,多信道的MAC机制可以一定程度上提高网络的吞吐量性能.但是,当允许控制帧以最大信道速率传输时,多信道MAC机制吞吐量性能并不比单信道MAC机制好.

关键词：多信道MAC协议信道分割 IEEE 802.11 Markov模型分布式队列

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一种新型无线Mesh网络多信道MAC协议

计算机工程与应用 2011年第26期47卷 66-69页

作者：李鹤松冷甦鹏电子科技大学通信与信息工程学院成都611731

在基于IEEE 802.11s无线Mesh网络中,Mesh网络接入点(MAP)和门户(MPP)在网络负载较重时会出现严重的流量瓶颈。为了保证MAP流量的优先传输,提出了基于节点优先级的新型多信道MAC协议(NPBM-MAC);为了减少在小规模组网时各BSS间频率干扰,... 详细信息

在基于IEEE 802.11s无线Mesh网络中,Mesh网络接入点(MAP)和门户(MPP)在网络负载较重时会出现严重的流量瓶颈。为了保证MAP流量的优先传输,提出了基于节点优先级的新型多信道MAC协议(NPBM-MAC);为了减少在小规模组网时各BSS间频率干扰,设计了基于地理位置信息和网络负载的频率分配方案(LLBFA)。仿真结果表明,NPBM-MAC协议和LLBFA频率分配方案能够有效解决重负载网络下的MAP/MPP瓶颈问题,最大限度地满足音视频等大业务流的QoS需求。

关键词：无线Mesh网络多信道介质访问控制频率分配

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数能一体化无线通信网络

中国科学：信息科学 2016年第5期46卷 591-609页

作者：杨鲲于秦冷甦鹏张平电子科技大学通信与信息工程学院成都611731 北京邮电大学网络与交换技术国家重点实验室北京100876

本文介绍一种新型的数能一体化无线通信网络(data and energy integrated communication networks,DEINs),它将传统的无线网络中相互独立的无线信息传输(wireless information transfer,WIT)和无线能量传输(wireless energy transfer,WET)融合起来,实现数据和能量的协作同传.传统的无线携能通信(simultaneous wireless information and power transfer,SWIPT)侧重在物理层进行,本文所提出的数能一体化网络则强调系统性,在网络各层设计并实现相应的协议和资源分配.与其他再生能源如风能太阳能等不同,数能一体化网络DEINs中的能量源,即基站的射频(RF)信号,不受自然环境的影响,而且完全可控.数能一体化网络在解决无线通信系统的能效问题、实现无线通信的节能减排方面具有巨大的潜力.本文从两个方面阐述所提出的数能一体化网络:能量和网络.在能量方面,本文介绍并分析了数能一体化网络的能量编码、能量模型、能量管理等.在数据网络方面,本文对数能一体化网络的各层讨论了几种核心技术,包括物理层、数据链路层协议及联合资源分配、网络层以及数能一体化网络的典型网络应用场景.在各层的介绍中,本文着重于新方向的讨论,而非现有研究工作的简单重述.最后,本文对该领域未来的发展趋势和研究方向作了总结和展望.

关键词：数能一体化网络携能通信能量收集能量管理资源分配