Netw. Protoc. Algorithms最新文献_第5页

Revisiting VoIP QoE assessment methods: are they suitable for VoLTE? 重新审视VoIP qos评估方法:是否适用于VoLTE?

Netw. Protoc. Algorithms Pub Date : 2016-07-21 DOI: 10.5296/npa.v8i2.9123

R. Sanchez-Iborra, M. Cano, J. García-Haro

引用次数: 4

Mobility and Network Selection in Heterogeneous Wireless Networks: User Approach and Implementation 异构无线网络中的移动性和网络选择:用户方法和实现

Netw. Protoc. Algorithms Pub Date : 2016-07-21 DOI: 10.5296/npa.v8i2.9327

Cristian Roman, Ruizhi Liao, Peter Ball, Shumao Ou

{"title":"Mobility and Network Selection in Heterogeneous Wireless Networks: User Approach and Implementation","authors":"Cristian Roman, Ruizhi Liao, Peter Ball, Shumao Ou","doi":"10.5296/npa.v8i2.9327","DOIUrl":"https://doi.org/10.5296/npa.v8i2.9327","url":null,"abstract":"The Intelligent Transport Systems (ITS) wireless infrastructure needs to support various safety and non-safety services for both autonomous and non-autonomous vehicles. The existing wireless infrastructures can already be used for communicating with different mobile entities at various monetary costs. A packet scheduler, included in a shim layer between the network layer and the medium access (MAC) layer, which is able to schedule packets between uncoordinated Radio Access Technologies ( RATs ) without modification of the wireless standards, has been devised and its performance evaluated. In this paper, we focus on the influence of mobility type in heterogeneous wireless networks. Three cases are considered based on the mobility in the city: walking, cycling, and driving. Realistic simulations are performed by generating mobility traces of Oxford from Google Maps and overlaying the real locations of existing WiFi Access Points. Results demonstrate that the shim layer approach can accommodate different user profiles and can be a useful abstraction to support Intelligent Transport Systems where there is no coordination between different wireless operators.","PeriodicalId":190994,"journal":{"name":"Netw. Protoc. Algorithms","volume":"19 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128181384","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: 4

Mobile Based Robotic Wireless Path Controller 移动机器人无线路径控制器

Netw. Protoc. Algorithms Pub Date : 2016-07-21 DOI: 10.5296/npa.v8i2.8947

Muna Ali Dahir, Alyaa Obaid, Aisha Ali, Amna Mohammed, A. Abou-Elnour, M. Tarique

{"title":"Mobile Based Robotic Wireless Path Controller","authors":"Muna Ali Dahir, Alyaa Obaid, Aisha Ali, Amna Mohammed, A. Abou-Elnour, M. Tarique","doi":"10.5296/npa.v8i2.8947","DOIUrl":"https://doi.org/10.5296/npa.v8i2.8947","url":null,"abstract":"For the past decade robotic systems have been successfully used to perform specific tasks with various degree of intelligence. Now-a-days, commercial robotics solutions are focusing more on personal services. Personal services robots are designed with necessary mobility and functional capabilities so that they can operate in a wide range of environments and can provide variety of services including health care, educational, domestic chore, entertainment, and rehabilitation. These personal robots perform various tasks and duties that are often unpredictable in nature. But, there are some technological challenges that need yet to be resolved. Integrating a robotic system with its components is usually a very complex task. Developing a modular robotic system that can perform well in various environments is also challenging. In addition robots should be provided with necessary skills so that they can perform various tasks. Keeping all these challenges in mind we presents a networked robotic system in this paper. The system is controlled by a smart phone. The path followed by the robot can be monitored via an LED panel. In order to control the operation an Android OS mobile application has been developed. Through this application a user can set a path for the robot to follow or can choose a path from a set of already defined paths. We tested our system in a controlled environments and the test results show that the robot can follow a path (either user defined or chosen) with a high accuracy.","PeriodicalId":190994,"journal":{"name":"Netw. Protoc. Algorithms","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114447455","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 Novel Clustering Algorithm Based on Agent Technology for VANET 一种基于Agent技术的VANET聚类算法

Netw. Protoc. Algorithms Pub Date : 2016-07-21 DOI: 10.5296/npa.v8i2.8434

S. Harrabi, Inès Ben Jaâfar, K. Ghédira

引用次数: 11

A Review on the Evolution of Eigenvalue Based Spectrum Sensing Algorithms for Cognitive Radio 基于特征值的认知无线电频谱感知算法发展综述

Netw. Protoc. Algorithms Pub Date : 2016-07-21 DOI: 10.5296/npa.v8i2.9349

K. Patil, Ashwini S. Lande, Mudassar Husain Naikwadi

{"title":"A Review on the Evolution of Eigenvalue Based Spectrum Sensing Algorithms for Cognitive Radio","authors":"K. Patil, Ashwini S. Lande, Mudassar Husain Naikwadi","doi":"10.5296/npa.v8i2.9349","DOIUrl":"https://doi.org/10.5296/npa.v8i2.9349","url":null,"abstract":"Spectrum scarcity has been encountered as a leading problem when launching new wireless services. To overcome this problem, cognitive radio is an optimistic solution. Spectrum sensing is a prominent task of cognitive radio. Over the past decade, numerous spectrum sensing algorithms have been proposed. In this paper, we present a comprehensive survey of evolutionary achievements of eigenvalue based spectrum sensing algorithms. The correlation between signal samples due to oversampling, multipath or multiple receivers gets reflected on the eigenvalues of the covariance matrix. It has been observed that different combinations of eigenvalues are used as test statistics and the distribution of eigenvalues and derivation of probability of detection is based on RMT (Random Matrix Theory). The main advantage offered by these algorithms is their robustness to noise uncertainty which severely affect other methods. Furthermore, they do not require accurate synchronization. These detections can be used for different signal detection applications without any prior information of signal or noise. To evaluate the performance of eigenvalue based spectrum sensing techniques under fading channels, we have simulated maximum to minimum eigenvalue based Detection (MME) and maximum eigenvalue based detection (MED) estimation for Rician fading channel. Simulation results shows that MME is much better than MED.","PeriodicalId":190994,"journal":{"name":"Netw. Protoc. Algorithms","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133341506","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: 3

Analytical and Experimental Evaluation of Handovers in IPv6 Mobility Management Protocols IPv6移动管理协议中切换的分析与实验评估

Netw. Protoc. Algorithms Pub Date : 2016-05-10 DOI: 10.5296/npa.v8i1.8725

J. Carmona-Murillo, David Cortés-Polo, Jesús Calle-Cancho, J. L. Sánchez, Francisco-Javie Rodríguez-Pérez

{"title":"Analytical and Experimental Evaluation of Handovers in IPv6 Mobility Management Protocols","authors":"J. Carmona-Murillo, David Cortés-Polo, Jesús Calle-Cancho, J. L. Sánchez, Francisco-Javie Rodríguez-Pérez","doi":"10.5296/npa.v8i1.8725","DOIUrl":"https://doi.org/10.5296/npa.v8i1.8725","url":null,"abstract":"Mobile data traffic in the Internet has experienced an exponential growth due to the widespread presence of multimedia capable mobile devices and the deployment of multiple wireless networks. With this continuous development of mobile communications, the achievement of an efficient IP mobility management protocol has revealed as one of the major challenges in next-generation wireless networks. Mobility management solutions are responsible for maintaining the ongoing communications while the user roams among distinct networks. Mobile IPv6 and Proxy Mobile IPv6 are the most representative solutions standardized by the IETF. Recently, the IPv6 mobility support has been newly integrated into the kernel sources and Linux mobility ready kernels are available from versions 3.8.1. In this article, we conduct an analytic and experimental evaluation of Mobile IPv6 and Proxy Mobile IPv6. We develop an analytic model of the signaling and handover latency. Moreover, we present an experimental study these protocols based on their open source implementations. We provide numerical results based on experiments made in real scenarios under different network conditions.","PeriodicalId":190994,"journal":{"name":"Netw. Protoc. Algorithms","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116180602","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: 7

Resource Allocation on a Hybrid Cloud for Smart Grids 面向智能电网的混合云资源分配

Netw. Protoc. Algorithms Pub Date : 2016-05-10 DOI: 10.5296/npa.v8i1.8721

Alan Briones, R. Pozuelo, Joan Navarro, A. Zaballos

{"title":"Resource Allocation on a Hybrid Cloud for Smart Grids","authors":"Alan Briones, R. Pozuelo, Joan Navarro, A. Zaballos","doi":"10.5296/npa.v8i1.8721","DOIUrl":"https://doi.org/10.5296/npa.v8i1.8721","url":null,"abstract":"The use of hybrid clouds enables companies to cover their demands of IT resources saving costs and gaining flexibility in the deployment of infrastructures by paying under demand these resources. However, considering a scenario with various services to be allocated in more than one cloud, it is necessary to find the distribution of services that minimizes the overall operating costs. This paper researches on the resource allocation methodology to be applied in a multi-cloud scenario based on the findings derived from the framework used for the FINESCE project. The purpose of this work is to define a methodology to assist on the hybrid cloud selection and configuration in the Smart Grid for both generic and highly-constrained scenarios in terms of latency and availability. Specifically, the presented method is aimed to determine which is the best cloud to allocate a resource by (1) optimizing the system with the information of the network and (2) minimizing the occurrence of collapsed or underused virtual machines. Also, to assess the performance of this method and any alternative proposals, a general set of metrics has been defined. These metrics have been refined taking into account the expertise of FINESCE partners in order to shape Smart Grid clouds and reduce the complexity of computation. Finally, using the data extracted from the FINESCE testbed, a decision tree is used to come up with the best resource allocation scheme.","PeriodicalId":190994,"journal":{"name":"Netw. Protoc. Algorithms","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125928769","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: 5

Eurobalise-Train communication modelling to assess interferences in railway control signalling systems eurobalise -列车通信建模以评估铁路控制信号系统中的干扰

Netw. Protoc. Algorithms Pub Date : 2016-05-10 DOI: 10.5296/npa.v8i1.8731

L. Rodriguez, Christian Pinedo, Igor Lopez, M. Aguado, J. Astorga, M. Higuero, I. Adin, G. Bistué, J. Mendizabal

{"title":"Eurobalise-Train communication modelling to assess interferences in railway control signalling systems","authors":"L. Rodriguez, Christian Pinedo, Igor Lopez, M. Aguado, J. Astorga, M. Higuero, I. Adin, G. Bistué, J. Mendizabal","doi":"10.5296/npa.v8i1.8731","DOIUrl":"https://doi.org/10.5296/npa.v8i1.8731","url":null,"abstract":"The evolution of the railway sector depends, to a great extent, on the deployment of advanced railway signalling systems. These signalling systems are based on communication architectures that must cope with complex electromagnetical environments. This paper is outlined in the context of developing the necessary tools to allow the quick deployment of these signalling systems by contributing to an easier analysis of their behaviour under the effect of electromagnetical interferences. Specifically, this paper presents the modelling of the Eurobalise-train communication flow in a general purpose simulation tool. It is critical to guarantee this communication link since any lack of communication may lead to a stop of the train and availability problems. In order to model precisely this communication link we used real measurements done in a laboratory equipped with elements defined in the suitable subsets. Through the simulation study carried out, we obtained performance indicators of the physical layer such as the received power, SNR and BER. The modelling presented in this paper is a required step to be able to provide quality of service indicators related to perturbed scenarios.","PeriodicalId":190994,"journal":{"name":"Netw. Protoc. Algorithms","volume":"208 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128163093","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: 10

Using Factor Analysis Techniques to Find Out Objective Video Quality Metrics for Live Video Streaming over Cloud Mobile Media Services 利用因子分析技术找到基于云移动媒体服务的实时视频流的客观视频质量指标

Netw. Protoc. Algorithms Pub Date : 2016-05-10 DOI: 10.5296/npa.v8i1.8850

M. García-Pineda, Santiago Felici-Castell, Jaume Segura-García

引用次数: 15

Security issues and threats that may affect the hybrid cloud of FINESCE 可能影响FINESCE混合云的安全问题和威胁

Netw. Protoc. Algorithms Pub Date : 2016-05-10 DOI: 10.5296/npa.v8i1.8727

Julia Sánchez, G. Corral, R. Pozuelo, A. Zaballos

{"title":"Security issues and threats that may affect the hybrid cloud of FINESCE","authors":"Julia Sánchez, G. Corral, R. Pozuelo, A. Zaballos","doi":"10.5296/npa.v8i1.8727","DOIUrl":"https://doi.org/10.5296/npa.v8i1.8727","url":null,"abstract":"FINESCE is the Smart Energy use case project of the Future Internet Public Private Partnership Programme. It aims at defining an open infrastructure based on Information and Communications Technology (ICT) used to develop new solutions and applications in all fields of Future Internet related to the energy sector. To accomplish this goal a cloud-based environment is proposed, providing high scalability, fast provisioning, resilience and cost efficiency, while facilitating the deployment of applications and services for utilities. The proposed solution for Smart Energy system encompasses Cloud Computing technologies taking advantage of the service delivery models that it provides (Infrastructure-as-a-Service (IaaS), Platform-as-a-Service (PaaS), Software-as-a-Service (SaaS)) over different cloud deployment solutions (Private, Public, Hybrid, Community). Therefore, it is necessary to study their implications, particularly with regard to security and data privacy, whether in transit or stored data, of the cloud solution chosen. The present paper aims to gather basic security requirements in deploying a solution based on Cloud Computing highlighting issues in hybrid clouds because this is the deployment model used in Smart Energy use case. It also exposes attacks and vulnerabilities related to Cloud Computing to be considered for implementing a secure environment for FIDEV, the private platform implementation. Moreover, the security requirements for Smart Energy use case are defined. And, finally, the results of a security audit performed over the testbed platform that simulates a distributed storage solution for FINESCE project are presented.","PeriodicalId":190994,"journal":{"name":"Netw. Protoc. Algorithms","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128412845","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: 12