32nd IEEE Conference on Local Computer Networks (LCN 2007)最新文献_第8页

An Efficient Algorithm for Preserving Events' Temporal Relationships in Wireless Sensor Actor Networks 一种保持无线传感器参与者网络中事件时间关系的有效算法

32nd IEEE Conference on Local Computer Networks (LCN 2007) Pub Date : 2007-10-15 DOI: 10.1109/LCN.2007.153

A. Boukerche, Anahit Martirosyan

{"title":"An Efficient Algorithm for Preserving Events' Temporal Relationships in Wireless Sensor Actor Networks","authors":"A. Boukerche, Anahit Martirosyan","doi":"10.1109/LCN.2007.153","DOIUrl":"https://doi.org/10.1109/LCN.2007.153","url":null,"abstract":"This paper proposes an event ordering algorithm for wireless sensor actor networks (WSANs) that could be applied for monitoring critical conditions (such as fires, explosions, toxic gas leaks etc.) in order to ensure the correct interpretation of events. We propose modifications to the ordering by confirmation event ordering protocol for WSANs by introducing clustering into the network's topology. The objectives of the proposed modifications are a reduced number of messages, energy efficiency, scalability and reduced latency. At the same time, we propose a hybrid synchronization scheme for the clustered topology, in which local time scales are used at the level of clusterheads. The clusterheads are synchronized with each other by the actor node using the reference broadcast synchronization technique, while the nodes inside clusters are synchronized with the round trip synchronization technique. The synchronization scheme aims at preserving energy and reducing network delay and it is better suited for the resource sparseness of wireless sensor networks as opposed to methods that use global time scales. Moreover, our proposed algorithm uses the message exchange necessary for event ordering and routing protocols for time synchronization purposes by piggybacking synchronization pulses and replies on these messages, thus reducing the additional traffic needed for time synchronization. In this paper, we present our protocol, discuss its implementation and provide its proof of correctness.","PeriodicalId":333233,"journal":{"name":"32nd IEEE Conference on Local Computer Networks (LCN 2007)","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122590925","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: 21

Performance Degradation of IEEE 802.15.4 Slotted CSMA/CA due to Hidden Nodes 隐藏节点导致的IEEE 802.15.4插槽CSMA/CA性能下降

32nd IEEE Conference on Local Computer Networks (LCN 2007) Pub Date : 2007-10-15 DOI: 10.1109/LCN.2007.134

M. Harthikote-Matha, Tarun Banka, A. Jayasumana

引用次数: 26

Power-Aware Link Maintenance (PALM) for Mobile Ad Hoc Networks 移动 Ad Hoc 网络的功率感知链路维护 (PALM)

32nd IEEE Conference on Local Computer Networks (LCN 2007) Pub Date : 2007-10-15 DOI: 10.1109/LCN.2007.112

Sungsoon Cho, J. Hayes

引用次数: 6

The capability of the EDCA mechanism to support voice traffic in a mixed voice/data transmission over 802.11e WLANs - an experimental investigation EDCA机制在802.11e无线局域网中支持混合语音/数据传输的语音流量的能力-一项实验性研究

32nd IEEE Conference on Local Computer Networks (LCN 2007) Pub Date : 2007-10-15 DOI: 10.1109/LCN.2007.152

M. Narbutt, M. Davis

{"title":"The capability of the EDCA mechanism to support voice traffic in a mixed voice/data transmission over 802.11e WLANs - an experimental investigation","authors":"M. Narbutt, M. Davis","doi":"10.1109/LCN.2007.152","DOIUrl":"https://doi.org/10.1109/LCN.2007.152","url":null,"abstract":"In this paper we experimentally evaluate the capability of the EDCA mechanism to support voice traffic in a mixed voice/data transmission over 802.1 le WLANs. In particular we investigate how real-time voice transmission can be supported by tuning four EDCA parameters, namely AIFSN, CWmin , CWmax, and TXOP and how this impacts on background data transmission. The experimental set-up involves fifteen VoIP terminals sending bi-directional traffic between wired and wireless subnets and another station injecting various types of heavy background loads to the wireless subnet. End-to-end voice transmission quality is predicted from time-varying transmission impairments with the use of the latest appendix to the ITU-T E-model. Our experimental results show that the AIFSN parameter more effectively protects voice calls against background data traffic than CWmin. We also demonstrate that tuning of the TXOP parameter does not improve the quality of voice transmission. To the best of our knowledge, this is the first experimental investigation regarding tuning of MAC layer EDCA parameters in a real 802.1 le WLAN network from the perspective of end-to-end voice transmission quality and end user satisfaction.","PeriodicalId":333233,"journal":{"name":"32nd IEEE Conference on Local Computer Networks (LCN 2007)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129984219","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

A Chord-based Recommender System 基于和弦的推荐系统

32nd IEEE Conference on Local Computer Networks (LCN 2007) Pub Date : 2007-10-15 DOI: 10.1109/LCN.2007.113

Christoph Sorge

引用次数: 2

Secure Anonymous Broadcasting in Vehicular Networks 车载网络中的安全匿名广播

32nd IEEE Conference on Local Computer Networks (LCN 2007) Pub Date : 2007-10-15 DOI: 10.1109/LCN.2007.37

Christine Laurendeau, M. Barbeau

引用次数: 21

Towards Smooth Introduction of IPv6 in SIP-based Architectures 在基于sip的体系结构中顺利引入IPv6

32nd IEEE Conference on Local Computer Networks (LCN 2007) Pub Date : 2007-10-15 DOI: 10.1109/LCN.2007.12

M. Boucadair, Y. Noisette

引用次数: 17

RFID Anti-collision Protocol for Dense Passive Tag Environments 面向密集被动标签环境的RFID防碰撞协议

32nd IEEE Conference on Local Computer Networks (LCN 2007) Pub Date : 2007-10-15 DOI: 10.1109/LCN.2007.140

Kashif Ali, H. Hassanein, A. Taha

引用次数: 43

Fibre Channel based Storage Area Network Modeling using OPNET for Large Fabric Simulations: Preliminary Work 基于光纤通道的存储区域网络建模使用OPNET进行大型Fabric仿真:初步工作

32nd IEEE Conference on Local Computer Networks (LCN 2007) Pub Date : 2007-10-15 DOI: 10.1109/LCN.2007.51

J. Staley, S. Muknahallipatna, H. Johnson

{"title":"Fibre Channel based Storage Area Network Modeling using OPNET for Large Fabric Simulations: Preliminary Work","authors":"J. Staley, S. Muknahallipatna, H. Johnson","doi":"10.1109/LCN.2007.51","DOIUrl":"https://doi.org/10.1109/LCN.2007.51","url":null,"abstract":"Fibre channel based storage area networks have been a common implementation for data storage in enterprise data centers. As the size of the storage area network tends to grow along with geographical distribution leading to distributed storage area network, also known as large fabric, the network seems to exhibit scaling and stability issues. The scaling and stability issues seem to stem from the construction, route discovery, and management process of the network which are fibre channel-2 level traffic more than the actual I/O data transmission process. To determine the scaling and stability issues of a large fabric, an adequate tool is required. The tool is usually a discrete event simulator since an analytical or hardware simulator tool would not be able to handle the large size of the storage area network and model in detail. In this paper, the preliminary work on modeling and simulations of a fibre channel based storage area network using OPNET as a discrete event simulator are presented. As a preliminary step, the fibre channel host bus adapter and its interactions with the fabric login server of a fibre channel switch during the fabric login process is modeled at the fibre channel-2 level and preliminary simulations are performed.","PeriodicalId":333233,"journal":{"name":"32nd IEEE Conference on Local Computer Networks (LCN 2007)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121301453","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

Investigation of IEEE 802.11k-based Access Point Coverage Area and Neighbor Discovery 基于IEEE 802.11的接入点覆盖区域和邻居发现研究

32nd IEEE Conference on Local Computer Networks (LCN 2007) Pub Date : 2007-10-15 DOI: 10.1109/LCN.2007.110

S. Hermann, M. Emmelmann, O. Belaifa, A. Wolisz

引用次数: 28