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39th Annual IEEE Conference on Local Computer Networks最新文献

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Modelling vegetation effects on RF propagation 模拟植被对射频传播的影响
39th Annual IEEE Conference on Local Computer Networks Pub Date : 2014-09-01 DOI: 10.1109/LCN.2014.6925814
M. M. Bhuiyan, M. MacGregor
{"title":"Modelling vegetation effects on RF propagation","authors":"M. M. Bhuiyan, M. MacGregor","doi":"10.1109/LCN.2014.6925814","DOIUrl":"https://doi.org/10.1109/LCN.2014.6925814","url":null,"abstract":"This paper presents preliminary results of a progressive research work investigating effects of vegetation on RF propagation. A theoretical model is developed to predict signal loss due to vegetation. The model considers path segments of different vegetation densities where the density measurements are available from satellite data. Signal loss over the entire propagation path is calculated by predicting and combining losses over individual segments. The model predicts vegetation loss factor (VLF) over each segment and then calculates the overall VLF of a path traversing multiple segments. The model has been validated against field data. Further modification of the model to include the effects of other environmental factors and different signal frequencies is under way.","PeriodicalId":143262,"journal":{"name":"39th Annual IEEE Conference on Local Computer Networks","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116090904","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
Resource reservation comparison of fault resilient routing schemes 故障恢复路由方案的资源预留比较
39th Annual IEEE Conference on Local Computer Networks Pub Date : 2014-09-01 DOI: 10.1109/LCN.2014.6925759
Y. Bejerano, P. Koppol
{"title":"Resource reservation comparison of fault resilient routing schemes","authors":"Y. Bejerano, P. Koppol","doi":"10.1109/LCN.2014.6925759","DOIUrl":"https://doi.org/10.1109/LCN.2014.6925759","url":null,"abstract":"Reliable delivery of network services is critically for numerous real-time applications, such as video conferencing, broadcast TV and content distribution, in which time sensitive content is delivered to a single or multiple destinations. Failure protection in connection-oriented networks can be realized using local protection schemes, such as fast reroute (FRR), or using end-to-end protection schemes, like redundant trees. In this paper we study the trade-offs between local and end-to-end protection schemes from several key aspects such as protection availability, management complexity and in particular the resource reservation efficiency of the two approaches.","PeriodicalId":143262,"journal":{"name":"39th Annual IEEE Conference on Local Computer Networks","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129913014","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
Maintaining sensor networks perpetually via wireless recharging mobile vehicles 通过无线充电为移动车辆永久维护传感器网络
39th Annual IEEE Conference on Local Computer Networks Pub Date : 2014-09-01 DOI: 10.1109/LCN.2014.6925781
W. Liang, Wenzheng Xu, Xiaojiang Ren, X. Jia, X. Lin
{"title":"Maintaining sensor networks perpetually via wireless recharging mobile vehicles","authors":"W. Liang, Wenzheng Xu, Xiaojiang Ren, X. Jia, X. Lin","doi":"10.1109/LCN.2014.6925781","DOIUrl":"https://doi.org/10.1109/LCN.2014.6925781","url":null,"abstract":"The emerging wireless energy transfer technology based on magnetic resonant coupling is a promising technology for wireless sensor networks as it can provide a controllable and perpetual energy source to sensors. In this paper we study the use of minimum number of wireless charging mobile vehicles to charge sensors in a sensor network so that none of the sensors runs out of its energy, subject to the energy capacity imposed on mobile vehicles, for which we first advocate an flexible on-demand wireless charging paradigm that decouples sensor energy charging scheduling from data routing protocols design. We then formulate an optimization problem of scheduling mobile vehicles to charge lifetime-critical sensors with an objective to minimize the number of mobile vehicles deployed, subject to the energy capacity constraint on each mobile vehicle. As the problem is NP-hard, we devise an approximation algorithm with a provable performance guarantee for it. We finally evaluate the performance of the proposed algorithm through experimental simulations. Experimental results demonstrate that the proposed algorithm is promising, and the solution obtained is fractional of the optimal.","PeriodicalId":143262,"journal":{"name":"39th Annual IEEE Conference on Local Computer Networks","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127959953","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: 45
How dia-shows turn into video flows: Adapting scalable video communication to heterogeneous network conditions in real-time 多媒体节目如何转变为视频流:实时适应异构网络条件下的可扩展视频通信
39th Annual IEEE Conference on Local Computer Networks Pub Date : 2014-09-01 DOI: 10.1109/LCN.2014.6925775
F. Jager, T. Schmidt, Matthias Wählisch
{"title":"How dia-shows turn into video flows: Adapting scalable video communication to heterogeneous network conditions in real-time","authors":"F. Jager, T. Schmidt, Matthias Wählisch","doi":"10.1109/LCN.2014.6925775","DOIUrl":"https://doi.org/10.1109/LCN.2014.6925775","url":null,"abstract":"Video conferencing over IP (VCoIP) is a major trend in current Internet communication and has particularly spread to the mobile realm. In this environment, users face the problem of heterogeneous and fluctuating network conditions. A promising solution to this issue is the scalable video coding (SVC). It allows an adaptation of the video stream to the available bandwidth, but requires a reliable bandwidth estimation. Adaptation times for conversational video at fluctuating network conditions are critical, and a fast strategy for bandwidth estimation is needed to avoid congestion. In this work, we analyse the capabilities of the sender and the receiver to adapt the video coding to changing network conditions. We derive an early congestion indicator at the sender side based on the jitter variation. For receivers, we use sustained goodput to extract a feasible scaling. In thorough evaluations that include real-world 3G networks, we reveal a faster congestion detection at the sender that are also more robust but less accurate than probing at the receiver.","PeriodicalId":143262,"journal":{"name":"39th Annual IEEE Conference on Local Computer Networks","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129575587","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
NCoS: A framework for realizing network coding over software-defined network NCoS:在软件定义网络上实现网络编码的框架
39th Annual IEEE Conference on Local Computer Networks Pub Date : 2014-09-01 DOI: 10.1109/LCN.2014.6925820
Sicheng Liu, Bei Hua
{"title":"NCoS: A framework for realizing network coding over software-defined network","authors":"Sicheng Liu, Bei Hua","doi":"10.1109/LCN.2014.6925820","DOIUrl":"https://doi.org/10.1109/LCN.2014.6925820","url":null,"abstract":"Network coding is a transmission mechanism for improving the capacity of multicast applications. Practical problems arise when applying network coding in traditional wired networks: multipath multicast routing, backward compatibility with deployed base, and adding new functions in commercial routers. SDN network naturally solves these problems via logically centralized control plane and open APIs of Openflow switches. This paper proposes NCoS, a framework for realizing network coding over SDN networks. It gives a brief introduction on how to extend Openflow protocol to include new actions, and add network coding related functions in controller and switches.","PeriodicalId":143262,"journal":{"name":"39th Annual IEEE Conference on Local Computer Networks","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130293238","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: 11
Towards on-path caching alternatives in Information-Centric Networks 迈向以信息为中心的网络中的路径上缓存替代方案
39th Annual IEEE Conference on Local Computer Networks Pub Date : 2014-09-01 DOI: 10.1109/LCN.2014.6925792
Andriana Ioannou, S. Weber
{"title":"Towards on-path caching alternatives in Information-Centric Networks","authors":"Andriana Ioannou, S. Weber","doi":"10.1109/LCN.2014.6925792","DOIUrl":"https://doi.org/10.1109/LCN.2014.6925792","url":null,"abstract":"Information-Centric Networking (ICN), an alternative to the current Internet architecture, focuses on the distribution and retrieval of content instead of the transfer of information between specific endpoints. Approaches to ICN employ caches in the network to eliminate the transfer of information over lengthy communication paths from a source to consumers. The contribution of this paper lies in the placement of copies in on-path in-network caching. Our goal is to investigate the suitability of a probabilistic algorithm, Prob-PD, based on two variables, the content's popularity rates and the distance ratio of each node from the source, with regard to caching performance, i.e. cache hit rates, cache replacement rates and content delivery times. Towards this goal, we present an initial comparison of simulation results of the proposed caching mechanism and published alternatives showing significant gains of the algorithm.","PeriodicalId":143262,"journal":{"name":"39th Annual IEEE Conference on Local Computer Networks","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130380553","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: 40
A stable minimum velocity CDS-based virtual backbone for VANET in city environment 城市环境下基于cd的VANET稳定最小速度虚拟骨干网
39th Annual IEEE Conference on Local Computer Networks Pub Date : 2014-09-01 DOI: 10.1109/LCN.2014.6925829
Mohammed Amine Togou, A. Hafid, P. Sahu
{"title":"A stable minimum velocity CDS-based virtual backbone for VANET in city environment","authors":"Mohammed Amine Togou, A. Hafid, P. Sahu","doi":"10.1109/LCN.2014.6925829","DOIUrl":"https://doi.org/10.1109/LCN.2014.6925829","url":null,"abstract":"For safety applications, fast delivery is the key requirement that broadcasting protocols in VANET must fulfill. To achieve this goal, most of the existing schemes try to select the optimal next forwarder through a distributed contention phase. This latter adds few units of delay at each hop which is substantial in case of multihop transmission. A more pragmatic approach is to build a stable virtual infrastructure, ahead of time, which will be in charge of relaying messages. In this regard, this paper presents the Minimum Stable CDS-based Virtual Backbone, labeled CDS-SVB, which guarantees fast and efficient broadcasting. It selects vehicles with identical velocities to assure stability as well as low dissemination delay, and it deploys acknowledgments to ensure reliability. Simulation results show that CDS-SVB outperforms DBA-MAC in terms of dissemination delay, backbone's lifetime, and packets delivery ratio.","PeriodicalId":143262,"journal":{"name":"39th Annual IEEE Conference on Local Computer Networks","volume":"1 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114124104","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: 23
Performance of probabilistic caching and cache replacement policies for Content-Centric Networks 以内容为中心网络的概率缓存和缓存替换策略的性能
39th Annual IEEE Conference on Local Computer Networks Pub Date : 2014-09-01 DOI: 10.1109/LCN.2014.6925761
S. Tarnoi, K. Suksomboon, W. Kumwilaisak, Yusheng Ji
{"title":"Performance of probabilistic caching and cache replacement policies for Content-Centric Networks","authors":"S. Tarnoi, K. Suksomboon, W. Kumwilaisak, Yusheng Ji","doi":"10.1109/LCN.2014.6925761","DOIUrl":"https://doi.org/10.1109/LCN.2014.6925761","url":null,"abstract":"The Content-Centric Networking (CCN) architecture exploits a universal caching strategy whose inefficiency has been confirmed by research communities. Various caching schemes have been proposed to overcome some drawbacks of the universal caching strategy but they come with additional complexity and overheads. Besides those sophisticated caching schemes, there is a probabilistic caching scheme that is more efficient than the universal caching strategy and adds a modest complexity to a network. The probabilistic caching scheme was treated as a benchmark and the insights into its behavior have never been studied despite its promising performance and feasibility in practical use. In this paper we study the probabilistic caching scheme by means of computer simulation to explore the behavior of the probabilistic caching scheme when it works with various cache replacement policies. The simulation results show the different behavioral characteristics of the probabilistic caching scheme as a function of the cache replacement policy.","PeriodicalId":143262,"journal":{"name":"39th Annual IEEE Conference on Local Computer Networks","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127833138","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: 45
Anchor selection and Geo-Logical Routing in 3D Wireless Sensor Networks 三维无线传感器网络中的锚点选择和地理逻辑路由
39th Annual IEEE Conference on Local Computer Networks Pub Date : 2014-09-01 DOI: 10.1109/LCN.2014.6925827
Yisong Jiang, A. Jayasumana
{"title":"Anchor selection and Geo-Logical Routing in 3D Wireless Sensor Networks","authors":"Yisong Jiang, A. Jayasumana","doi":"10.1109/LCN.2014.6925827","DOIUrl":"https://doi.org/10.1109/LCN.2014.6925827","url":null,"abstract":"Inherent differences in geometric, deployment and propagation constraints prevent many 2D sensor network routing algorithms from scaling to 3D. Complex 3D shapes and surfaces make geometric coordinate based techniques inefficient or impractical for 3D. Geo-Logical Routing (GLR) switches between virtual and topology coordinate domains to overcome the local minima of each other. GLR is demonstrated to be highly effective for complex 3D networks. Addition of a second initial anchor pair in Extreme Node Search (ENS) increases the number of anchors, thus enhancing performance in networks with very high node degree, while traditional 2D ENS performs just as well in other cases. Simulations demonstrate that GLR with ENS anchor placement significantly outperforms the Greedy Distributed Spanning Tree Routing (3D-GDSTR) algorithm, but without the need for localization.","PeriodicalId":143262,"journal":{"name":"39th Annual IEEE Conference on Local Computer Networks","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129883450","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
Incremental collaborative trajectory estimation using WSN based on multifrontal QR factorization 基于多正面QR分解的WSN增量协同轨迹估计
39th Annual IEEE Conference on Local Computer Networks Pub Date : 2014-09-01 DOI: 10.1109/LCN.2014.6925807
Daniel I. M. Quinones, C. Margi
{"title":"Incremental collaborative trajectory estimation using WSN based on multifrontal QR factorization","authors":"Daniel I. M. Quinones, C. Margi","doi":"10.1109/LCN.2014.6925807","DOIUrl":"https://doi.org/10.1109/LCN.2014.6925807","url":null,"abstract":"Wireless Sensor Networks (WSN) are used for a variety of applications, including the target's trajectory estimation. Most proposed solutions are based on sequential estimation. However, in this paper we present a new solution to the trajectory estimation problem using the batch estimation approach. In our solution, we model the problem as a system of equations AX = b, with matrix A being sparse and vector X being the trajectory. Next, through multifrontal QR factorization, factorization A = QR is distributed between the sensors, which calculate it collaboratively and incrementally. Simulation results show that our solution has the same performance as the centralized estimator. Also, we demonstrate its implementation viability by showing that the processing and memory requirements are compatible to generic motes characteristics.","PeriodicalId":143262,"journal":{"name":"39th Annual IEEE Conference on Local Computer Networks","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116951707","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
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