2007 15th International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems最新文献_第2页

Performance Comparison of Error Compensation Techniques with Multipath Transmission in Wireless Multimedia Sensor Networks 无线多媒体传感器网络中多径传输误差补偿技术的性能比较

2007 15th International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems Pub Date : 2007-10-24 DOI: 10.1109/MASCOTS.2007.50

Pinar Sarisaray, Gürkan Gür, S. Baydere, A. E. Harmanci

{"title":"Performance Comparison of Error Compensation Techniques with Multipath Transmission in Wireless Multimedia Sensor Networks","authors":"Pinar Sarisaray, Gürkan Gür, S. Baydere, A. E. Harmanci","doi":"10.1109/MASCOTS.2007.50","DOIUrl":"https://doi.org/10.1109/MASCOTS.2007.50","url":null,"abstract":"Due to the proliferation of the multimedia applications over unreliable medium like wireless networks, robust image and video communication have become more important. In this paper, we consider the transmission distortions on the multimedia data due to both channel impairments and instant node failures for Wireless Multimedia Sensor Networks (WMSN). Two techniques are investigated to compensate the multimedia distortions at the expense of incurring additional delays and/or wasting bandwidth resources. First technique is an error concealment technique utilizing discrete wavelet transform for embedding downsized replicas of original image into itself, thereby mitigating degradations in a backward-compatible scheme. The other is Reed-Solomon coding utilizing additional information bits to correct bit/symbol errors. Two techniques are also integrated with multipath transmission to provide fault tolerance. Performance results show that error concealment with multipath transmission technique (ECMF) is more promising to compensate for losses due to unreliable channels and instant node failures than Reed-Solomon coding with multipath transmission technique (RSMF) in WMSN.","PeriodicalId":335632,"journal":{"name":"2007 15th International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131359464","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: 14

Performance Analysis of Wireless MAC Protocols Using a Search Based Framework 基于搜索框架的无线MAC协议性能分析

2007 15th International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems Pub Date : 2007-10-24 DOI: 10.1109/MASCOTS.2007.49

S. Begum, S. Gupta, A. Helmy

{"title":"Performance Analysis of Wireless MAC Protocols Using a Search Based Framework","authors":"S. Begum, S. Gupta, A. Helmy","doi":"10.1109/MASCOTS.2007.49","DOIUrl":"https://doi.org/10.1109/MASCOTS.2007.49","url":null,"abstract":"Previously, we have developed a framework to perform systematic analysis of CSMA/CA based wireless MAC protocols. The framework first identifies protocol states that meet our study objective of minimizing a given performance metric. It then applies search techniques and heuristics to construct sequences of protocol events in a given topology that satisfy our objective. In this paper, we demonstrate that our framework can easily be extended to evaluate performance of new protocols by evaluating two completely different variants, namely MAC protocols for (i) quality of service (QoS), and (ii) power control. In each case, we identify previously unknown problems with the protocol. In particular, we generate scenarios where throughput of a lower priority class can be as high as 5 times compared to the throughput of a higher priority class, thus contradicting the basic notion of QoS. Traditional performance evaluation approaches typically evaluate average performance but do not capture the worst cases, nor do they expose the protocol breaking points. Thus this paper demonstrates the usefulness of a systematic approach in evaluating the protocol breaking points.","PeriodicalId":335632,"journal":{"name":"2007 15th International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115103334","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

Reducing Hybrid Disk Write Latency with Flash-Backed I/O Requests 使用闪存支持的I/O请求减少混合磁盘写延迟

2007 15th International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems Pub Date : 2007-10-24 DOI: 10.1109/MASCOTS.2007.57

Timothy Bisson, S. Brandt

引用次数: 52

Pricing Broadband Internet Adaptive Services 宽带互联网自适应服务定价

2007 15th International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems Pub Date : 2007-10-24 DOI: 10.1109/MASCOTS.2007.53

H. T. Marques-Neto, Virgílio A. F. Almeida, J. Almeida

{"title":"Pricing Broadband Internet Adaptive Services","authors":"H. T. Marques-Neto, Virgílio A. F. Almeida, J. Almeida","doi":"10.1109/MASCOTS.2007.53","DOIUrl":"https://doi.org/10.1109/MASCOTS.2007.53","url":null,"abstract":"Broadband Internet pricing scheme should charge users based on their consumption pattern. It could avoid resource wasting because light users will not have to subsidize heavy users. Furthermore, a fair pricing scheme could save bandwidth during hours of day, which would improve broadband carriers capacity management and planning efforts. This paper presents a fair broadband pricing scheme where users' adaptive applications are configured to adjust their demand in accordance with several parameters, such as user's budget, estimated future needs, and usage price defined and published by the service provider. We simulate our pricing scheme and three others schemes using real data from a broadband Internet Service Provider (ISP) in order to analyze bandwidth saving and utility obtained by users. We show that in the proposed pricing scheme 15% of users have positive payoff, 1% have negative, and for the rest of the users the payoff is zero. We also present the re-distribution of the workload curves along the time-of-day and show that bandwidth saving happens in almost 60% of all hours of the day. We compare our pricing scheme with others reported in the literature and the simulation results show the potential of our proposal.","PeriodicalId":335632,"journal":{"name":"2007 15th International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128582183","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

Model-free Adaptive Hysteresis for Dynamic Bandwidth Reservation 动态带宽保留的无模型自适应迟滞

2007 15th International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems Pub Date : 2007-10-24 DOI: 10.1109/MASCOTS.2007.37

N. Akar

引用次数: 3

Improving the Efficiency of Spam Filtering through Cache Architecture 利用缓存架构提高垃圾邮件过滤效率

2007 15th International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems Pub Date : 2007-10-24 DOI: 10.1109/MASCOTS.2007.27

Ashok Khanal, B. S. Motlagh, T. Koçak

{"title":"Improving the Efficiency of Spam Filtering through Cache Architecture","authors":"Ashok Khanal, B. S. Motlagh, T. Koçak","doi":"10.1109/MASCOTS.2007.27","DOIUrl":"https://doi.org/10.1109/MASCOTS.2007.27","url":null,"abstract":"Blacklists (BLs), also called domain name system-based blackhole list (DNSBLs) are the databases of known internet addresses used by the spammers to send out the spam mails. Mail servers use these lists to filter out the e-mails coming from different spam sources. In contrary, Whitelists (WLs) are the explicit list of senders from whom e-mail can be accepted or delivered. Mail transport agent (MTA) is usually configured to reject, challenge or flag the messages which have been sent from the sources listed on one or more DNSBLs and to allow the messages from the sources listed on the WLs. In this paper, we are demonstrating how the bandwidth (the overall requests and responses that need to go over the network) performance is improved by using local caches for BLs and WLs. The actual sender's IP addresses are extracted from the e-mail log. These are then compared with the list in the local caches to find out if they should be accepted or not, before they are checked against the global DNSBLs by running 'DNSBL queries' (if required). Around three quarters of the e-mail sources have been observed to be filtered locally through caches with this method. Provision of local control over the lists and lower search (filtering) time are the other related benefits.","PeriodicalId":335632,"journal":{"name":"2007 15th International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131883017","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

Nine months in the life of EGEE: a look from the South EGEE生命中的九个月:从南方看

2007 15th International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems Pub Date : 2007-10-24 DOI: 10.1109/MASCOTS.2007.43

Georges Da Costa, M. Dikaiakos, S. Orlando

引用次数: 13

Joint-State Modeling for Open Queuing Networks with Breakdowns, Repairs and Finite Buffers 具有故障、修复和有限缓冲区的开放排队网络的联合状态建模

2007 15th International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems Pub Date : 2007-10-24 DOI: 10.1109/MASCOTS.2007.29

R. Chakka, E. Ever, O. Gemikonakli

引用次数: 12

Network Performance Analysis based on Histogram Workload Models 基于直方图负载模型的网络性能分析

2007 15th International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems Pub Date : 2007-10-24 DOI: 10.1109/MASCOTS.2007.42

Enrique Hernández-Orallo, Joan Vila i Carbó

引用次数: 10

Average Network Blocking Probabilities for TDM WDM Optical Networks with OTSIs and without WC 带otsi和不带WC的TDM WDM光网络的平均网络阻塞概率

2007 15th International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems Pub Date : 2007-10-24 DOI: 10.1109/MASCOTS.2007.12

Cheah Huei Yoong, Pung Hung Keng, N. Krivulin

引用次数: 3