2008 New Technologies, Mobility and Security最新文献_第3页

Connectivity Aware Instrumental Approach for Measuring Vocal Transmission Quality Over a Wireless Ad-Hoc Network 在无线自组织网络上测量语音传输质量的连接感知仪器方法

2008 New Technologies, Mobility and Security Pub Date : 2008-11-25 DOI: 10.1109/NTMS.2008.ECP.32

Sofiene Jelassi, H. Youssef

{"title":"Connectivity Aware Instrumental Approach for Measuring Vocal Transmission Quality Over a Wireless Ad-Hoc Network","authors":"Sofiene Jelassi, H. Youssef","doi":"10.1109/NTMS.2008.ECP.32","DOIUrl":"https://doi.org/10.1109/NTMS.2008.ECP.32","url":null,"abstract":"This paper describes an on-line, end-to-end and non- intrusive approach to estimate the vocal transmission quality over wireless ad-hoc networks. The proposed assessment algorithm, denoted PEVOM (perceptual evaluation of voice over MANETs), is based on the fact that the observed quality of packet based voice conversations is time varying and that mobile users may tolerate degradation of perceptual quality and even the interruption of service. The evaluation of transmission quality adopted by PEVOM is relying on e-model paradigm. PEVOM includes an original extension to e-model to adequately rate the distortion effect due to the intermittent nature of established connection incurred by mobile users over a MANET. Specifically, PEVOM checks passively the connectivity between communicating parties by monitoring periodically the ratio of active to total time. When mobile users are connected, PEVOM calculates the perceptual quality using the conventional e-model. However, when mobile nodes are disconnected, PEVOM calculates the perceptual quality according to an expected recency effect. At the end of each connected/disconnected period, PEVOM estimates the perceptual quality of each interval using a weighted average over time. At the end of a vocal session, PEVOM rates the overall conversational quality using a weighted average over time of the produced rating factor of each connected/disconnected interval. The rating behavior of PEVOM is verified through a study of the vocal transmission quality over an intermittent multi-hop wireless connection.","PeriodicalId":432307,"journal":{"name":"2008 New Technologies, Mobility and Security","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122050245","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

Mutual Authentication for SIP: A Semantic Meaning for the SIP Opaque Values SIP的相互认证:SIP不透明值的语义含义

2008 New Technologies, Mobility and Security Pub Date : 2008-11-25 DOI: 10.1109/NTMS.2008.ECP.69

Thomas Guillet, A. Serhrouchni, M. Badra

{"title":"Mutual Authentication for SIP: A Semantic Meaning for the SIP Opaque Values","authors":"Thomas Guillet, A. Serhrouchni, M. Badra","doi":"10.1109/NTMS.2008.ECP.69","DOIUrl":"https://doi.org/10.1109/NTMS.2008.ECP.69","url":null,"abstract":"The session initiation protocol (SIP) is rapidly becoming the dominant signalling protocol for calls over the Internet. It has quickly made large inroads into the voice over IP (VoIP) market. SIP is an application-layer control operating on top of a transport protocol and allows to create, modify, and terminate sessions with one or more participants. With security considerations, these operations require authentication from participating end-points, confidentiality, data integrity, and protection against internal and external attacks. For authentication, SIP relies on HTTP Digest by default; the client is authenticated to the SIP proxy server. In order to have mutual authentication between client and server, SIP could be implemented over TLS (transport layer security) when TCP is supported by SIP architecture network. In this paper, we propose a mutual authentication mechanism within HTTP Digest since this later is implemented by default in all SIP environments. It consists in providing meaning and semantic to some of the parameters' values generated by the participating end-points during SIP session establishment, especially to the \"nonce\" values. Our solution is backward-compatible with today implementations. Without being in opposition to security protocols like TLS, this approach helps in reducing DoS (denial of service) attacks, detects server identity spoofing and ensures basic mutual authentication with comparison to HTTP digest.","PeriodicalId":432307,"journal":{"name":"2008 New Technologies, Mobility and Security","volume":"170 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123193066","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: 15

Employing Clustering Techniques in Mobile Network Planning 应用聚类技术进行移动网络规划

2008 New Technologies, Mobility and Security Pub Date : 2008-11-25 DOI: 10.1109/NTMS.2008.ECP.42

L. F. Ibrahim, M. A. Harbi

{"title":"Employing Clustering Techniques in Mobile Network Planning","authors":"L. F. Ibrahim, M. A. Harbi","doi":"10.1109/NTMS.2008.ECP.42","DOIUrl":"https://doi.org/10.1109/NTMS.2008.ECP.42","url":null,"abstract":"Network planning is of key importance during the construction of new communities and cities, in which telephone and data services have to be introduced as a component of the overall master plan of the city. With the rapid development in mobile network we need effective network planning tool to satisfy the need of customers. However, deciding upon the optimum placement for the base stations (BS's) to achieve best services while reducing the cost is a complex task requiring vast computational resource. This paper addresses antenna placement problem or the cell planning problem, involves locating and configuring infrastructure for mobile networks by modified the original partitioning around medoids PAM algorithm. The PAM original algorithm has been modified and a new algorithm M- PAM (modified-partitioning around medoids) has been proposed by the authors in a recent work (L.F Ibrahin and M.H. Al Harbi, 2008). This paper presents CWN-PAM (clustering with weighted node-partitioning around medoids) algorithm and compare it with M-PAM algorithm. Implementation of this algorithm to a real case study is presented. Results demonstrate the effectiveness and flexibility of the modifying algorithm in tackling the important problem of mobile network planning.","PeriodicalId":432307,"journal":{"name":"2008 New Technologies, Mobility and Security","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134500708","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: 8

Threat Modeling in Pervasive Computing Paradigm 普适计算范式中的威胁建模

2008 New Technologies, Mobility and Security Pub Date : 2008-11-25 DOI: 10.1109/NTMS.2008.ECP.97

N. Malik, M. Javed, U. Mahmud

引用次数: 8

Multipath Routing Scheme in Solar Powered Wireless Sensor Networks 太阳能无线传感器网络中的多路径路由方案

2008 New Technologies, Mobility and Security Pub Date : 2008-11-25 DOI: 10.1109/NTMS.2008.ECP.67

Thirumal Kandasamy, Jaya Kumar Krishnan

引用次数: 4

Controlling Physical Objects with Privacy using Secure RFID System 使用安全RFID系统控制具有隐私的物理对象

2008 New Technologies, Mobility and Security Pub Date : 2008-11-25 DOI: 10.1109/NTMS.2008.ECP.33

Fahad Samad, Sadeq Ali Makram

引用次数: 0

Path Selection Method for Localized QoS Routing 本地化QoS路由的选路方法

2008 New Technologies, Mobility and Security Pub Date : 2008-11-25 DOI: 10.1109/NTMS.2008.ECP.75

A. Alzahrani, M. E. Woodward

引用次数: 0

Offline Approach to Modeling and Optimization of Flows in Peer-to-Peer Systems 点对点系统中流的离线建模与优化方法

2008 New Technologies, Mobility and Security Pub Date : 2008-11-25 DOI: 10.1109/NTMS.2008.ECP.71

K. Walkowiak

引用次数: 8

An RF Channel Emulator-Based Testbed for Cooperative Transmission Using Wireless Sensor Devices 基于射频信道仿真器的无线传感器协同传输试验台

2008 New Technologies, Mobility and Security Pub Date : 2008-11-25 DOI: 10.1109/NTMS.2008.ECP.22

Jin-Woo Jung, M. A. Ingram

引用次数: 4

Self Organizing Maps for Synchronization in Wireless Sensor Networks 用于无线传感器网络同步的自组织映射

2008 New Technologies, Mobility and Security Pub Date : 2008-11-25 DOI: 10.1109/NTMS.2008.ECP.90

L. Paladina, A. Biundo, M. Scarpa, A. Puliafito

{"title":"Self Organizing Maps for Synchronization in Wireless Sensor Networks","authors":"L. Paladina, A. Biundo, M. Scarpa, A. Puliafito","doi":"10.1109/NTMS.2008.ECP.90","DOIUrl":"https://doi.org/10.1109/NTMS.2008.ECP.90","url":null,"abstract":"Providing a powerful synchronization system is one of the most important goals to be pursued if an efficient utilization of sensor networks has to be addressed. The basic concept behind a Wireless Sensor Network is to deploy a large number of sensor nodes able to acquire and process data. Most of WSNs applications require sensor nodes to maintain local clocks both to determine the events order and to provide temporal information to measured data; to achieve this goal applications generally require a low synchronization precision, close to Milli seconds. This paper proposes a novel synchronization system based on Kohonen's Self Organizing Maps (SOMs), able to provide some Artificial Intelligence features to sensor nodes. A SOM is a particular neural network that learns to classify data without any supervision. In each sensor node, a SOM is implemented to evaluate the sensor node time, using a very little amount of storage and computing resources. In a scenario where thousands of sensor nodes are placed, this system evaluates the time of each sensor in a distributed manner, assuming a very little percentage of nodes knowing the actual time, thus ensuring an effective clock synchronization among all the sensors.","PeriodicalId":432307,"journal":{"name":"2008 New Technologies, Mobility and Security","volume":"217 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126107167","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