2020 IEEE Latin-American Conference on Communications (LATINCOM)最新文献_第3页

Resource Allocation Technique for Edge Computing Using Grey Wolf Optimization Algorithm 基于灰狼优化算法的边缘计算资源分配技术

2020 IEEE Latin-American Conference on Communications (LATINCOM) Pub Date : 2020-11-18 DOI: 10.1109/LATINCOM50620.2020.9282316

D. Lieira, M. S. Quessada, A. L. Cristiani, R. Meneguette

{"title":"Resource Allocation Technique for Edge Computing Using Grey Wolf Optimization Algorithm","authors":"D. Lieira, M. S. Quessada, A. L. Cristiani, R. Meneguette","doi":"10.1109/LATINCOM50620.2020.9282316","DOIUrl":"https://doi.org/10.1109/LATINCOM50620.2020.9282316","url":null,"abstract":"The explosion of IoT technology poses new challenges for researchers in the concept of cloud computing, mainly in improving the distribution of services, which need to be provided with greater efficiency and less latency. Therefore, this work seeks to optimize the methodology of resource allocation in Edge Computing, seeking to improve the quality of service (QoS) to the user. For this, it was developed an algorithm for efficient resource allocation using grey wolves optimization technique, named as Resource Allocation Technique for Edge Computing (RATEC). The algorithm adopted the meta-heuristic technique to choose the best Edge when allocating the resources of user equipment (UE). In this work, it was considered that the UEs are composed of processing, storage, time and memory resources. The algorithm uses these resources to calculate the fitness of each Edge and decide which one to allocate, if available. The RATEC has been compared with two other policies and has managed to serve a number most significant of UEs, reducing the number of services refused and presenting a low number of blockages while searching for an Edge.","PeriodicalId":309189,"journal":{"name":"2020 IEEE Latin-American Conference on Communications (LATINCOM)","volume":"31 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123443617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

M-QAM modulation technique effect for an OFDM-RoF/XGS-PON converged network M-QAM调制技术对OFDM-RoF/XGS-PON融合网络的影响

2020 IEEE Latin-American Conference on Communications (LATINCOM) Pub Date : 2020-11-18 DOI: 10.1109/LATINCOM50620.2020.9282347

Cristian David Quilindo-Méndez, Eduar Fernando Hoyos-Zúñiga, A. F. Escallón-Portilla

{"title":"M-QAM modulation technique effect for an OFDM-RoF/XGS-PON converged network","authors":"Cristian David Quilindo-Méndez, Eduar Fernando Hoyos-Zúñiga, A. F. Escallón-Portilla","doi":"10.1109/LATINCOM50620.2020.9282347","DOIUrl":"https://doi.org/10.1109/LATINCOM50620.2020.9282347","url":null,"abstract":"This paper focuses on analyzing, at the simulation level, the effect of the M-ary Quadrature Amplitude Modulation (M-QAM) technique, for an OFDM-RoF converged network infrastructure based on the XGS-PON standard, with a 10 Gbps capacity for a point-to-point downlink and an FTTH application, with an operating wavelength of 1550 nm or 193.4 THz (overlayed OFDM-RoF/XGS-PON system). The above, with the purpose of determining the network performance, as both the order of the M-QAM modulation and the distance of the optical link are increased, considering that the performance of a radio over optical fiber system can be significantly degraded by nonlinear phenomena present in the optical link, as well as noise and distortion phenomena that affect the signal quality. In the results of the research, the increase in the order of the M-QAM modulation allows us to represent more bits per symbol, however, a higher transmission power is required. Finally, it is considered that it is possible to develop a robust OFDM-RoF converged network infrastructure for speeds in the order of 10 Gbps for the last mile services, since it uses the advantages of both wireless and optical technologies.","PeriodicalId":309189,"journal":{"name":"2020 IEEE Latin-American Conference on Communications (LATINCOM)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130547222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

A Downlink Non Orthogonal Multiple Access for Chirp Spread Spectrum Communications 啁啾扩频通信下行链路非正交多址

2020 IEEE Latin-American Conference on Communications (LATINCOM) Pub Date : 2020-11-18 DOI: 10.1109/LATINCOM50620.2020.9282261

G. Ferré, Baptiste Laporte-Fauret, Mohamed Amine Ben Temim

引用次数: 2

Secure Data Integrity in VANETs based on CS-DC Scheme 基于CS-DC方案的VANETs数据完整性保护

2020 IEEE Latin-American Conference on Communications (LATINCOM) Pub Date : 2020-11-18 DOI: 10.1109/LATINCOM50620.2020.9282267

Elbasher Elmahdi, S. Yoo

引用次数: 1

Recursive method for the equivalent baseband channel for hybrid beamforming in massive MU-MIMO mmWave systems 大规模MU-MIMO毫米波系统混合波束形成等效基带信道的递归方法

2020 IEEE Latin-American Conference on Communications (LATINCOM) Pub Date : 2020-11-18 DOI: 10.1109/LATINCOM50620.2020.9282345

A. Ortega, R. Neto, R. David

{"title":"Recursive method for the equivalent baseband channel for hybrid beamforming in massive MU-MIMO mmWave systems","authors":"A. Ortega, R. Neto, R. David","doi":"10.1109/LATINCOM50620.2020.9282345","DOIUrl":"https://doi.org/10.1109/LATINCOM50620.2020.9282345","url":null,"abstract":"Communications using the millimeter wave (mmWave) spectrum are a mainstream technology of the next generation systems due to its huge available bandwidth. However, the mmWave band will experience much more propagation loss than a low-frequency band. Conventional precoding techniques are impractical at mmWave scenarios due to manufacturing costs and power consumption. Hybrid beamforming, which combines large dimensional analog processing with lower-dimensional digital processing, is the most promising approach for reducing the hardware cost in massive mmWave MU-MIMO systems. The digital processing part can be designed from traditional MIMO methods, however, the analog processing part has to be carefully selected to produce a workable equivalent baseband channel. In this paper, we propose three hybrid processing designs based on MMSE, whose difference relies on their analog part. The considered strategies for designing the analog part are through singular value decomposition, an iterative method, and a recursive algorithm, where the last one highlights due to its robustness. Numerical results in terms of BER evidence that the proposed recursive algorithm reaches the best performance regardless of the scenarios and data detectors.","PeriodicalId":309189,"journal":{"name":"2020 IEEE Latin-American Conference on Communications (LATINCOM)","volume":"2013 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133606335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design and Experimentation of a Low-cost Receiver for Visible Light Communications 低成本可见光通信接收机的设计与实验

2020 IEEE Latin-American Conference on Communications (LATINCOM) Pub Date : 2020-11-18 DOI: 10.1109/LATINCOM50620.2020.9282291

Wyatt Greives, Hovannes Kulhandjian

{"title":"Design and Experimentation of a Low-cost Receiver for Visible Light Communications","authors":"Wyatt Greives, Hovannes Kulhandjian","doi":"10.1109/LATINCOM50620.2020.9282291","DOIUrl":"https://doi.org/10.1109/LATINCOM50620.2020.9282291","url":null,"abstract":"Visible light communication (VLC), an emerging field of research, requires the use of visible light, optical sensors, transimpedance amplifiers (TIA), and filtration circuitry. As processing is done with voltages, TIAs convert the current from the optical source into a voltage. In this paper, we propose a low-cost receiver for long-range visible light communications. The receiver is composed of a wide bandwidth TIA using an off the shelf operational amplifier (op-amp). The design process focuses on the calculations for feedback resistance and capacitance, and other op-amp stabilization techniques for the receiver. We test the proposed receiver along with the TIA using the National Instruments simulator tool Multisim to determine the optimum operational bandwidth. The proposed VLC system is developed and experimented on a testbed composed of the transmitter circuitry, designed receiver, and National Instrument's USB-6351 data acquisition board for analog-to-digital (ADC) and digital-to-analog (DAC) conversion operations. Random data bit stream at a bit rate of $50 kb/s$ is transmitted using on-off keying (OOK) modulation scheme. We study the bit-error rate (BER) performance for different transmitter and receiver distances up to 860 cm. The experimental results reveal that for a distance of 380 cm a BER of $9.76times 10^{-5}$ is achieved.","PeriodicalId":309189,"journal":{"name":"2020 IEEE Latin-American Conference on Communications (LATINCOM)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121695367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

A decision support framework to enhance user experiences in resource constrained devices 一个决策支持框架，以增强资源受限设备中的用户体验

2020 IEEE Latin-American Conference on Communications (LATINCOM) Pub Date : 2020-11-18 DOI: 10.1109/LATINCOM50620.2020.9282304

Saibal K. Ghosh, D. Agrawal

引用次数: 0

Straggler Remission for Federated Learning via Decentralized Redundant Cayley Tree 基于分散冗余Cayley树的联邦学习离散缓解

2020 IEEE Latin-American Conference on Communications (LATINCOM) Pub Date : 2020-11-18 DOI: 10.1109/LATINCOM50620.2020.9282334

Yangyang Tao, Junxiu Zhou

{"title":"Straggler Remission for Federated Learning via Decentralized Redundant Cayley Tree","authors":"Yangyang Tao, Junxiu Zhou","doi":"10.1109/LATINCOM50620.2020.9282334","DOIUrl":"https://doi.org/10.1109/LATINCOM50620.2020.9282334","url":null,"abstract":"Federated learning, one of the parallel machine learning models, recently has become a promising direction for large scale mobile edge computing. It leverages the computational power of edge devices (i.e., mobile devices) to train machine learning models with distributed data sets on edge devices without uploading data sets to the cloud. The straightforward benefit is avoiding data security concerns. However, federated learning also encounters challenges, like stragglers (end-devices that respond slowly) among devices due to heterogeneity of devices. Most of the existing body of research tries to address the problem through training objects replication and information coding design such as maximum distance separable (MDS) code. In this paper, we propose a decentralized redundant n-Cayley tree (DRC-tree) for federated learning. Our proposal aims to explore the hierarchical structure of the n-Cayley tree to enhance the redundancy rate in federated learning to mitigate the impact of stragglers. In the DRC- tree structure, the fusion node serves as the root node, while all the worker devices are the intermediate tree nodes and leaves that formulated through a distributed message passing interface. the redundancy of workers is constructed layer by layer with a given redundancy branch degree. The optimality of the proposed architecture is theoretically analyzed and simulated experiments are also conducted through CloudLab with synchronous stochastic gradient descent (SGD) implementation. The experimental results show that the proposed DRC-tree architecture reduces the errors caused by stragglers compared with the state of arts.","PeriodicalId":309189,"journal":{"name":"2020 IEEE Latin-American Conference on Communications (LATINCOM)","volume":"141 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114779911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

A Double-Stage Phase Hit Mitigation Scheme In Microwave Backhaul Links 微波回程链路中的双级相位打击缓解方案

2020 IEEE Latin-American Conference on Communications (LATINCOM) Pub Date : 2020-11-18 DOI: 10.1109/LATINCOM50620.2020.9282264

Peyman Neshaastegaran, Ming Jian

引用次数: 0

Performance evaluation for 5G FWA in Quasi Static mmWave Channels: OFDM vs SC-QAM 准静态毫米波信道中5G FWA的性能评估:OFDM与SC-QAM

2020 IEEE Latin-American Conference on Communications (LATINCOM) Pub Date : 2020-11-18 DOI: 10.1109/LATINCOM50620.2020.9282294

Dario Estupinan, Daniel Jaramillo-Ramírez, R. Puerta

引用次数: 2