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2009 Seventh Annual Communication Networks and Services Research Conference最新文献

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Performance Improvement by Means of Collaboration between Network Intrusion Detection Systems 基于网络入侵检测系统协作的性能改进
2009 Seventh Annual Communication Networks and Services Research Conference Pub Date : 2009-05-11 DOI: 10.1109/CNSR.2009.48
M. Hanaoka, K. Kono, Toshio Hirotsu
{"title":"Performance Improvement by Means of Collaboration between Network Intrusion Detection Systems","authors":"M. Hanaoka, K. Kono, Toshio Hirotsu","doi":"10.1109/CNSR.2009.48","DOIUrl":"https://doi.org/10.1109/CNSR.2009.48","url":null,"abstract":"Because of today's increased traffic volume and sophisticated attacks, implementing a network intrusion detection/prevention system (NIDS/NIPS) with a single workstation has been challenging. In this paper, we propose Brownie, a system for improving performance by means of collaboration between already-existing NIDSs, instead of installing one expensive hardware or parallel NIDS at a network entry point. Our Brownie achieves performance improvement by 1) offloading overloaded NIDS, and 2) eliminating redundant rules. First, a Brownie exchanges NIDSs' load status and transfers some rules from overloaded to light-loaded NIDSs, which prevents the overloaded NIDSs from bottlenecking the network. Second, if some NIDSs in a network path enable the same rules, a Brownie eliminates the redundant rules, which reduces the aggregate overhead of the NIDSs. The experimental results with a university full-packet trace suggest that Brownies successfully offloads overloaded NIDS and eliminates redundant rules.","PeriodicalId":103090,"journal":{"name":"2009 Seventh Annual Communication Networks and Services Research Conference","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132626820","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 Parallel Double-Step CORDIC Algorithm for Digital Down Converter 数字下变频的并行双步CORDIC算法
2009 Seventh Annual Communication Networks and Services Research Conference Pub Date : 2009-05-11 DOI: 10.1109/CNSR.2009.47
Hang Wang, Yousi Zheng, Xiaokang Lin
{"title":"A Parallel Double-Step CORDIC Algorithm for Digital Down Converter","authors":"Hang Wang, Yousi Zheng, Xiaokang Lin","doi":"10.1109/CNSR.2009.47","DOIUrl":"https://doi.org/10.1109/CNSR.2009.47","url":null,"abstract":"The COordinate Rotation DIgital Computer (CORDIC) algorithm is a widely studied and hardware-efficient iterative algorithm for evaluating many arithmetic operations. In this paper, we propose a parallel double step CORDIC algorithm. All rotation directions can be predicted in parallel while two rotations are processed in each iteration. The novel hybrid algorithm achieves much less delay and similar throughput compared with parallel CORDIC algorithm [1]. Based on the new algorithm, we also provide a digital down converter architecture using dual CORDIC processor to eliminate both multiplier and CORDIC scale factor.","PeriodicalId":103090,"journal":{"name":"2009 Seventh Annual Communication Networks and Services Research Conference","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132712204","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
IEEE 802.11 & Bluetooth Interference: Simulation and Coexistence IEEE 802.11与蓝牙干扰:仿真与共存
2009 Seventh Annual Communication Networks and Services Research Conference Pub Date : 2009-05-11 DOI: 10.1109/CNSR.2009.41
A. Mathew, N. Chandrababu, K. Elleithy, S. Rizvi
{"title":"IEEE 802.11 & Bluetooth Interference: Simulation and Coexistence","authors":"A. Mathew, N. Chandrababu, K. Elleithy, S. Rizvi","doi":"10.1109/CNSR.2009.41","DOIUrl":"https://doi.org/10.1109/CNSR.2009.41","url":null,"abstract":"IEEE 802.11 and Bluetooth, these two operating in the unlicensed 2.4Ghz frequency band are becoming more anymore popular in the mobile computing world. The number of devices equipped with IEEE 802.11 and Bluetooth is growing drastically. Result is the number of co-located devices , say within 10meters, grown to a limit, so that it may cause interference issues in the 2.4Ghz radio frequency spectrum. Bluetooth supports both voice(SCO) and data(ACL) packets. In this paper we investigate these interference issues and use a new Bluetooth voice packet named synchronous connection-oriented with Repeated Transmission (SCORT) to study the improvement in performance. For the sake of simulation results, we provide a comprehensive simulation results using MATLAB Simulink.","PeriodicalId":103090,"journal":{"name":"2009 Seventh Annual Communication Networks and Services Research Conference","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133152493","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: 25
QoS Protection in Cognitive Wireless Mesh Networks: Issues and Solutions 认知无线网状网络中的QoS保护:问题与解决方案
2009 Seventh Annual Communication Networks and Services Research Conference Pub Date : 2009-05-11 DOI: 10.1109/CNSR.2009.50
D. Luong, Jean-Charles Grégoire, Z. Dziong
{"title":"QoS Protection in Cognitive Wireless Mesh Networks: Issues and Solutions","authors":"D. Luong, Jean-Charles Grégoire, Z. Dziong","doi":"10.1109/CNSR.2009.50","DOIUrl":"https://doi.org/10.1109/CNSR.2009.50","url":null,"abstract":"Radio links in cognitive wireless mesh networks (CWMN) exhibit fluctuations in link capacity due to the unpredictable nature of the occupancy of frequency holes by primary users in addition to variability in the quality of wireless channels. These variations prevent quality of service (QoS) from being delivered on CWMNs solely by using traditional mechanisms, i.e. call admission control, bandwidth reservation, queue management and packet scheduling. In [1] a quality of service protection (QoSP) architecture has been proposed which extends the failure protection mechanisms used in MPLS networks to protect QoS for CWMNs. This paper aims to provide solutions for the open QoSP-related issues: (1) a measure called effective capacity is defined and estimated to characterize the fluctuation in link capacity, (2) a policy is provided to reach decisions about path switching when QoS degradation happens and (3) a margin guard call admission control and an adaptive method to find suitable margin guards is proposed to keep the probability of successful path restoration above a predefined threshold.","PeriodicalId":103090,"journal":{"name":"2009 Seventh Annual Communication Networks and Services Research Conference","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133542958","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
Energy Balancing Routing Schemes for Low-Power Wireless Networks 低功耗无线网络的能量均衡路由方案
2009 Seventh Annual Communication Networks and Services Research Conference Pub Date : 2009-05-11 DOI: 10.1109/CNSR.2009.70
E. Sung, M. Potkonjak
{"title":"Energy Balancing Routing Schemes for Low-Power Wireless Networks","authors":"E. Sung, M. Potkonjak","doi":"10.1109/CNSR.2009.70","DOIUrl":"https://doi.org/10.1109/CNSR.2009.70","url":null,"abstract":"We address the problem of energy balancing in multi-hop wireless networks to optimize their operational lifetime. We first present a localized routing algorithm. Then, for a performance evaluation of the localized algorithm, we present a centralized routing algorithm because a centralized approach with global knowledge can closely approach the optimal solution. Unlike many previous energy-aware routing protocols, both of our presented algorithms consider total energy expenditure for guaranteed packet delivery. We use simulation to study their performance under a variety of network conditions. The simulation results show, firstly, that both schemes achieve significant improvement of energy balancing proportional to node density and, secondly, our proposed localized routing scheme achieves a performance comparable to the centralized scheme under dense networks.","PeriodicalId":103090,"journal":{"name":"2009 Seventh Annual Communication Networks and Services Research Conference","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124955804","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
Multicriteria PCF Design: An Accurate Photonic Crystal Fiber Design Tool 多准则PCF设计:一种精确的光子晶体光纤设计工具
2009 Seventh Annual Communication Networks and Services Research Conference Pub Date : 2009-05-11 DOI: 10.1109/CNSR.2009.46
I. Sassi, N. Belacel, Y. Bouslimani, H. Hamam
{"title":"Multicriteria PCF Design: An Accurate Photonic Crystal Fiber Design Tool","authors":"I. Sassi, N. Belacel, Y. Bouslimani, H. Hamam","doi":"10.1109/CNSR.2009.46","DOIUrl":"https://doi.org/10.1109/CNSR.2009.46","url":null,"abstract":"In recent years there has been a major development in optical communications and a new generation of fibers was introduced. These fibers, called photonic Crystal Fibers (PCF) have unusual propagation properties. This paper presents multicriteria PCF design tool, which is an accurate PCF design based on multicriteria classification. This method combines the deductive and the inductive learning and it is introduced for the first time in the field of optical fibers. The multicriteria decision analysis (MCDA) makes it possible to evaluate the optical proprieties of PCFs by determining the resemblance of a PCF fiber to specified PCF category. The MCDA avoids recourse to classical distances and makes it possible to use quantitative and/or qualitative criteria. Moreover, it defeats some difficulties encountered when data are expressed in different units. These advantages allow the new multicriteria classification method to be employed easily to the diagnosis and to the design of photonic-crystals fibers.","PeriodicalId":103090,"journal":{"name":"2009 Seventh Annual Communication Networks and Services Research Conference","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123976938","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
Performance Analysis of an Indoor UWB System Based on Energy Detection 基于能量检测的室内超宽带系统性能分析
2009 Seventh Annual Communication Networks and Services Research Conference Pub Date : 2009-05-11 DOI: 10.1109/CNSR.2009.54
Z. Tingting, Zhang Qinyu, Zhang Nai-tong, Xu Hongguang
{"title":"Performance Analysis of an Indoor UWB System Based on Energy Detection","authors":"Z. Tingting, Zhang Qinyu, Zhang Nai-tong, Xu Hongguang","doi":"10.1109/CNSR.2009.54","DOIUrl":"https://doi.org/10.1109/CNSR.2009.54","url":null,"abstract":"In this paper, we present a ranging experiment performed in a typical indoor environment with a digital ultra wideband (UWB) system. At first, the structures of UWB transceivers are introduced, based on which the time of arrival (TOA) estimation algorithm based on energy detection is proposed consequently. Then the experiment background including the environment and measure method is illustrated. In order to mitigate the ranging error caused by theoretical algorithm and practical circuits, One way - time difference of arrival (OW-TDOA) ranging method and corresponding approaches are proposed and carried out. The obtained results show that this UWB ranging system can achieve a relative high ranging accuracy in a multipath environment (e.g. about 5cm at ranges up to 10m), which is practical and meaningful for many sensor applications.","PeriodicalId":103090,"journal":{"name":"2009 Seventh Annual Communication Networks and Services Research Conference","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130258404","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
BER Reduction through Soft Information Relaying in Incremental Redundancy Cooperative Coded Schemes 基于软信息中继的增量冗余协同编码方案误码率降低
2009 Seventh Annual Communication Networks and Services Research Conference Pub Date : 2009-05-11 DOI: 10.1109/CNSR.2009.61
Mahmood Mohassel Feghhi, B. Abolhassani
{"title":"BER Reduction through Soft Information Relaying in Incremental Redundancy Cooperative Coded Schemes","authors":"Mahmood Mohassel Feghhi, B. Abolhassani","doi":"10.1109/CNSR.2009.61","DOIUrl":"https://doi.org/10.1109/CNSR.2009.61","url":null,"abstract":"In conventional incremental redundancy cooperative coding (IRCC) multiuser networks, if a user decodes its partner’s data with error, it ignores sending incremental redundancy for its partner; thus, cooperation gain can not be achieved in such a case. In this paper, we propose a novel scheme that achieves cooperation gain even when relaying users decode their partner’s data with error. This novel technique can be used to overcome the performance degradation caused by error-prone inter-user link. We study bit error rate (BER) performance of the proposed scheme in Nakagami fading channels. Simulation results show that the new scheme has superior performance compared to that of the conventional IRCC schemes and less than 0.3 dB inferior performance compared to that of full cooperative scheme with error-free inter-user link,  at BER","PeriodicalId":103090,"journal":{"name":"2009 Seventh Annual Communication Networks and Services Research Conference","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129454538","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
An Improved Hierarchical Markovian Target Tracking (I-HMTT) Algorithm for Energy Efficient Wireless Sensor Networks 高能效无线传感器网络中改进的分层马尔可夫目标跟踪算法
2009 Seventh Annual Communication Networks and Services Research Conference Pub Date : 2009-05-11 DOI: 10.1109/CNSR.2009.57
Keyvan Yasami, Morteza Ziyadi, B. Abolhassani
{"title":"An Improved Hierarchical Markovian Target Tracking (I-HMTT) Algorithm for Energy Efficient Wireless Sensor Networks","authors":"Keyvan Yasami, Morteza Ziyadi, B. Abolhassani","doi":"10.1109/CNSR.2009.57","DOIUrl":"https://doi.org/10.1109/CNSR.2009.57","url":null,"abstract":"In this paper, we consider a target-tracking sensor network and improve its energy awareness through predicting a target trajectory and decreasing sampling rate of sensors while maintaining an acceptable tracking accuracy. The tracking problem is formulated as a hierarchical Markov decision process (MDP) and is solved through neurodynamic programming. Though this is not new, improvements in performance of the network are achieved by use of a reinforcement learning algorithm to solve the MDP that converges faster than the preceding used methods, since the energy efficiency and speed of convergence of the solution are tightly coupled. Simulation results show the effectiveness of our algorithm against other known target tracking algorithms.","PeriodicalId":103090,"journal":{"name":"2009 Seventh Annual Communication Networks and Services Research Conference","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121385430","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
Carrier Frequency Offset Mitigation in OFDM Systems Using Efficient Tone Reservation 利用有效的音调保留缓解OFDM系统中的载波频偏
2009 Seventh Annual Communication Networks and Services Research Conference Pub Date : 2009-05-11 DOI: 10.1109/CNSR.2009.13
A. Ghassemi, T. Gulliver
{"title":"Carrier Frequency Offset Mitigation in OFDM Systems Using Efficient Tone Reservation","authors":"A. Ghassemi, T. Gulliver","doi":"10.1109/CNSR.2009.13","DOIUrl":"https://doi.org/10.1109/CNSR.2009.13","url":null,"abstract":"One of the major drawbacks of orthogonal frequency division multiplexing (OFDM) is sensitivity to carrier frequency offset (CFO) caused by a mismatch between the transmitter and receiver oscillators. CFO destroys the orthogonality of the subcarriers and introduces intercarrier interference (ICI), reducing the system performance. Previously, tone reservation (TR) was considered for reducing the peak interference-to-carrier ratio (PICR) and shown to provide significant PICR reduction. In this paper, we use submatrices of the inverse fast Fourier transform (IFFT) and fast Fourier transform (FFT) to reduce the number of variables in the optimization to efficiently compute the optimal tones. Performance results are presented which demonstrate that the proposed algorithm yields PICR performance similar to that with the previous TR technique.","PeriodicalId":103090,"journal":{"name":"2009 Seventh Annual Communication Networks and Services Research Conference","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128136161","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
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