Masayoshi Mizutani Keio University, Graduate School of Media and Governance 5322 Endo Fujisawa-shi Kanagawa, Japan mizutani@sfc.wide.ad.jp Keiji Takeda Keio University, Faculty of Environment and Information Studies 5322 Endo Fujisawa-shi Kanagawa, Japan keiji@sfc.keio.ac.jp Jun Murai Keio University, Faculty of Environment and Information Studies 5322 Endo Fujisawa-shi Kanagawa, Japan jun@wide.ad.jp
{"title":"Behavior rule based intrusion detection","authors":"M. Mizutani, K. Takeda, J. Murai","doi":"10.1145/1658997.1659028","DOIUrl":"https://doi.org/10.1145/1658997.1659028","url":null,"abstract":"Masayoshi Mizutani Keio University, Graduate School of Media and Governance 5322 Endo Fujisawa-shi Kanagawa, Japan mizutani@sfc.wide.ad.jp Keiji Takeda Keio University, Faculty of Environment and Information Studies 5322 Endo Fujisawa-shi Kanagawa, Japan keiji@sfc.keio.ac.jp Jun Murai Keio University, Faculty of Environment and Information Studies 5322 Endo Fujisawa-shi Kanagawa, Japan jun@wide.ad.jp","PeriodicalId":181045,"journal":{"name":"Co-Next Student Workshop '09","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133431258","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}
Lin Cong, Guohan Lu, Yang Chen, Beixing Deng, Xing Li
Accurate and effective estimation of TCP operating point impacts directly on TCP performance, especially in modern high-speed networks. In this paper, we focus on two crucial questions: 1) In order to guarantee the performance and stability of TCP, how accurately does the TCP operating point need to be estimated? 2) Ahead of the occurrence of network congestion, how accurately can TCP estimate its operating points at the end host? We declare that the estimator which is based on TCP packet series can satisfy the accuracy TCP required.
{"title":"What level of estimating accuracy does TCP need and can TCP achieve","authors":"Lin Cong, Guohan Lu, Yang Chen, Beixing Deng, Xing Li","doi":"10.1145/1658997.1659009","DOIUrl":"https://doi.org/10.1145/1658997.1659009","url":null,"abstract":"Accurate and effective estimation of TCP operating point impacts directly on TCP performance, especially in modern high-speed networks. In this paper, we focus on two crucial questions: 1) In order to guarantee the performance and stability of TCP, how accurately does the TCP operating point need to be estimated? 2) Ahead of the occurrence of network congestion, how accurately can TCP estimate its operating points at the end host? We declare that the estimator which is based on TCP packet series can satisfy the accuracy TCP required.","PeriodicalId":181045,"journal":{"name":"Co-Next Student Workshop '09","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125385648","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}
Recently, the lack of spectrum resources becomes an important problem for advanced wireless networks. To overcome this problem, dynamic spectrum access receives much attention. In this paper, we propose a spectrum assignment method based on a genetic algorithm in which a WiFi system temporarily uses a spectrum band of WiMAX system in WiMAX/WiFi integrated networks.
{"title":"A spectrum assignment method based on genetic algorithm in WiMAX/WiFi integrated network","authors":"M. Nakagawa, K. Kinoshita, K. Murakami, K. Kawano","doi":"10.1145/1658997.1659004","DOIUrl":"https://doi.org/10.1145/1658997.1659004","url":null,"abstract":"Recently, the lack of spectrum resources becomes an important problem for advanced wireless networks. To overcome this problem, dynamic spectrum access receives much attention. In this paper, we propose a spectrum assignment method based on a genetic algorithm in which a WiFi system temporarily uses a spectrum band of WiMAX system in WiMAX/WiFi integrated networks.","PeriodicalId":181045,"journal":{"name":"Co-Next Student Workshop '09","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116563530","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}
Hybrid multicast is regarded a promising technology to overcome the inter-domain deployment problem for group communication. Realistic performance estimators are difficult to obtain due to the diversity of overlay concepts and their complex dependence on the global Internet topology that withstands straightforward simulations or measurements. We contribute a simple analytic model for the expected delay distribution. Parametrized by realistic measurement values, this should serve as a first order estimator for quantifying the delay penalties in a global-scale hybrid multicast packet distribution. We diagnose a strong dependence on hop counts and proximity awareness for the overlay multicast approach in use with promising results for most efficient schemes.
{"title":"An a priori estimator for the delay distribution in global hybrid multicast","authors":"Matthias Wählisch, T. Schmidt","doi":"10.1145/1658997.1659008","DOIUrl":"https://doi.org/10.1145/1658997.1659008","url":null,"abstract":"Hybrid multicast is regarded a promising technology to overcome the inter-domain deployment problem for group communication. Realistic performance estimators are difficult to obtain due to the diversity of overlay concepts and their complex dependence on the global Internet topology that withstands straightforward simulations or measurements. We contribute a simple analytic model for the expected delay distribution. Parametrized by realistic measurement values, this should serve as a first order estimator for quantifying the delay penalties in a global-scale hybrid multicast packet distribution. We diagnose a strong dependence on hop counts and proximity awareness for the overlay multicast approach in use with promising results for most efficient schemes.","PeriodicalId":181045,"journal":{"name":"Co-Next Student Workshop '09","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116763180","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}
Innovative software and system development requires a multi-disciplinary approach where technical, objectively quantifiable Quality of Service aspects are integrated with and correlated to subjective Quality of Experience measures such as usability, user expectations and experiences. To date, QoS and QoE research has however mainly been carried out in an isolated manner. Their exact correlation consequently remains unclear. Using a collaborative multi-platform game as case study, we intend to investigate this relationship and hope to bridge the divide that currently exists between social, user-oriented research and technically-oriented application development by formulating recommendations and guidelines. To implement the QoS and QoE optimizations, we will rely on the NIProxy, a network proxy equipped with network traffic shaping and service provision functionality.
{"title":"Investigating the relationship between QoS and QoE in a mixed desktop/handheld gaming setting","authors":"Maarten Wijnants, S. Agten, P. Quax, W. Lamotte","doi":"10.1145/1658997.1659013","DOIUrl":"https://doi.org/10.1145/1658997.1659013","url":null,"abstract":"Innovative software and system development requires a multi-disciplinary approach where technical, objectively quantifiable Quality of Service aspects are integrated with and correlated to subjective Quality of Experience measures such as usability, user expectations and experiences. To date, QoS and QoE research has however mainly been carried out in an isolated manner. Their exact correlation consequently remains unclear. Using a collaborative multi-platform game as case study, we intend to investigate this relationship and hope to bridge the divide that currently exists between social, user-oriented research and technically-oriented application development by formulating recommendations and guidelines. To implement the QoS and QoE optimizations, we will rely on the NIProxy, a network proxy equipped with network traffic shaping and service provision functionality.","PeriodicalId":181045,"journal":{"name":"Co-Next Student Workshop '09","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122044526","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}
The upload contribution of peers in a peer-to-peer streaming system depends on their willingness to contribute as well as their physical limitation. Several incentive schemes have been proposed to enforce non-willing peers to cooperate. But we find it of great interest to see how physically constrained, with respect to resources, peers can be supported by a streaming application. In this paper we investigate how free-riders, namely non-contributing peers, can be served in a peer-to-peer streaming system. We examine different prioritization schemes that are used by high contributing peers to prioritize other contributing peers over free-riders and show that as the level of prioritization increases, contributing peers receive higher quality but the average quality drops. To avoid this, we propose an incentive mechanism that encourages contributing peers to upload to free-riders so that the average quality experienced by the peers in the overlay is maximized.
{"title":"Maximizing streaming quality in heterogeneous overlays through incentives","authors":"I. Chatzidrossos","doi":"10.1145/1658997.1659017","DOIUrl":"https://doi.org/10.1145/1658997.1659017","url":null,"abstract":"The upload contribution of peers in a peer-to-peer streaming system depends on their willingness to contribute as well as their physical limitation. Several incentive schemes have been proposed to enforce non-willing peers to cooperate. But we find it of great interest to see how physically constrained, with respect to resources, peers can be supported by a streaming application. In this paper we investigate how free-riders, namely non-contributing peers, can be served in a peer-to-peer streaming system. We examine different prioritization schemes that are used by high contributing peers to prioritize other contributing peers over free-riders and show that as the level of prioritization increases, contributing peers receive higher quality but the average quality drops. To avoid this, we propose an incentive mechanism that encourages contributing peers to upload to free-riders so that the average quality experienced by the peers in the overlay is maximized.","PeriodicalId":181045,"journal":{"name":"Co-Next Student Workshop '09","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134275102","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}
The delay-sensitive applications has been rapidly growing in recent years, while the current Internet is not well equipped to support such delay-sensitive traffic. The proposed SRD (Stochastic Rate-Delay) services enable a user to choose between a higher transmission rate or low queuing delay at a congested network link. Delay could be allowed to spike occasionally as long as average low delay remains guaranteed. We build a model using stochastic network calculus to analyze the proposal and shed insight on its fundamental characteristics quantitatively.
{"title":"When stochastic rate-delay services meet stochastic network calculus","authors":"Kai Wang, Chuang Lin","doi":"10.1145/1658997.1659025","DOIUrl":"https://doi.org/10.1145/1658997.1659025","url":null,"abstract":"The delay-sensitive applications has been rapidly growing in recent years, while the current Internet is not well equipped to support such delay-sensitive traffic. The proposed SRD (Stochastic Rate-Delay) services enable a user to choose between a higher transmission rate or low queuing delay at a congested network link. Delay could be allowed to spike occasionally as long as average low delay remains guaranteed. We build a model using stochastic network calculus to analyze the proposal and shed insight on its fundamental characteristics quantitatively.","PeriodicalId":181045,"journal":{"name":"Co-Next Student Workshop '09","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120908819","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}
Inter-domain forwarding state is growing at a super-linear rate, rendering older routers obsolete and increasing the cost of replacement. A reduction of state will alleviate this problem. In this paper, we outline a new reduced-state inter-domain forwarding mechanism. We carefully drop portions of the advertised forwarding state using a utility measure for prefixes based on the length of the prefix and the path length to its origin. A deterministic forwarding algorithm uses the resulting partial view. The graph of connections between autonomous systems is shallow, offering many viable paths for data flows, a property we aim to use to achieve minimal detrimental effect on delay and AS path stretch.
{"title":"Deterministic, reduced-visibility inter-domain forwarding","authors":"Stephen D. Strowes, C. Perkins","doi":"10.1145/1658997.1659003","DOIUrl":"https://doi.org/10.1145/1658997.1659003","url":null,"abstract":"Inter-domain forwarding state is growing at a super-linear rate, rendering older routers obsolete and increasing the cost of replacement. A reduction of state will alleviate this problem. In this paper, we outline a new reduced-state inter-domain forwarding mechanism. We carefully drop portions of the advertised forwarding state using a utility measure for prefixes based on the length of the prefix and the path length to its origin. A deterministic forwarding algorithm uses the resulting partial view. The graph of connections between autonomous systems is shallow, offering many viable paths for data flows, a property we aim to use to achieve minimal detrimental effect on delay and AS path stretch.","PeriodicalId":181045,"journal":{"name":"Co-Next Student Workshop '09","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129225827","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}
Wireless sensor networks (WSNs) are about to become a popular and inexpensive tool for all kinds of applications. More advanced applications also need end-to-end routing, which goes beyond the simple data dissemination and collection mechanisms of early WSNs. The special properties of WSNs -- scarce memory, CPU, and energy resources -- make this a challenge. The Dynamic Address Routing protocol (DART) could be a good candidate for WSN routing, if it were not so prone to link outages. In this paper, we propose Scalable Landmark Flooding (SLF), a new routing protocol for large WSNs. It combines ideas from landmark routing, flooding, and dynamic address routing. SLF is robust against link and node outages, requires only little routing state, and generates low maintenance traffic overhead.
{"title":"Scalable landmark flooding: a scalable routing protocol for WSNs","authors":"Pengfei Di, T. Fuhrmann","doi":"10.1145/1658997.1658999","DOIUrl":"https://doi.org/10.1145/1658997.1658999","url":null,"abstract":"Wireless sensor networks (WSNs) are about to become a popular and inexpensive tool for all kinds of applications. More advanced applications also need end-to-end routing, which goes beyond the simple data dissemination and collection mechanisms of early WSNs. The special properties of WSNs -- scarce memory, CPU, and energy resources -- make this a challenge. The Dynamic Address Routing protocol (DART) could be a good candidate for WSN routing, if it were not so prone to link outages.\u0000 In this paper, we propose Scalable Landmark Flooding (SLF), a new routing protocol for large WSNs. It combines ideas from landmark routing, flooding, and dynamic address routing. SLF is robust against link and node outages, requires only little routing state, and generates low maintenance traffic overhead.","PeriodicalId":181045,"journal":{"name":"Co-Next Student Workshop '09","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121652529","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}
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