Pub Date : 2009-04-06DOI: 10.1109/TRIDENTCOM.2009.4976243
Yue Zhao, X. Fang, Xiaopeng Hu, Zhengguang Zhao, Yan Long
For the next generation wireless communication systems, inter-cell interference (ICI) is the primary cause of performance degradation in cell edge mobile stations of OFDMA multi-hop cellular networks with the frequency reuse pattern (1, 3, 1). This paper introduces a new fractional frequency reuse scheme to assign radio resources in OFDMA multi-hop networks to reduce inter-cell interference and maintain the sector frequency reuse factor at 1. Through the numerical analysis, we find that this scheme can yield higher SINR and improve the system capacity. Furthermore, the results also indicate that fractional frequency reuse relay system with local forwarding scheme can achieve higher throughput than local forwarding scheme in conventional relay system.
{"title":"Fractional frequency reuse schemes and performance evaluation for OFDMA multi-hop cellular networks","authors":"Yue Zhao, X. Fang, Xiaopeng Hu, Zhengguang Zhao, Yan Long","doi":"10.1109/TRIDENTCOM.2009.4976243","DOIUrl":"https://doi.org/10.1109/TRIDENTCOM.2009.4976243","url":null,"abstract":"For the next generation wireless communication systems, inter-cell interference (ICI) is the primary cause of performance degradation in cell edge mobile stations of OFDMA multi-hop cellular networks with the frequency reuse pattern (1, 3, 1). This paper introduces a new fractional frequency reuse scheme to assign radio resources in OFDMA multi-hop networks to reduce inter-cell interference and maintain the sector frequency reuse factor at 1. Through the numerical analysis, we find that this scheme can yield higher SINR and improve the system capacity. Furthermore, the results also indicate that fractional frequency reuse relay system with local forwarding scheme can achieve higher throughput than local forwarding scheme in conventional relay system.","PeriodicalId":254380,"journal":{"name":"2009 5th International Conference on Testbeds and Research Infrastructures for the Development of Networks & Communities and Workshops","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128798350","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}
Pub Date : 2009-04-06DOI: 10.1109/TRIDENTCOM.2009.4976193
Mustafa ElNainay, Feng Ge, Y. Wang, Amr E. Hilal, Yongsheng Shi, A. B. Mackenzie, C. Bostian
In our demonstration, we show how cognitive radios can be organized to form a cooperative ad-hoc cognitive radio network that utilizes the available spectrum opportunistically and efficiently through channel allocation while at the same time avoiding causing interference to primary users as they become active. Our cognitive radios are Software Defined Radios consisting of a Linux laptop and a Universal Software Radio Peripheral integrated with our extended implementation of the GNU Radio software package and our Localized island Genetic Algorithm implementation for the channel allocation.
{"title":"Channel allocation for dynamic spectrum access cognitive networks using Localized island Genetic Algorithm","authors":"Mustafa ElNainay, Feng Ge, Y. Wang, Amr E. Hilal, Yongsheng Shi, A. B. Mackenzie, C. Bostian","doi":"10.1109/TRIDENTCOM.2009.4976193","DOIUrl":"https://doi.org/10.1109/TRIDENTCOM.2009.4976193","url":null,"abstract":"In our demonstration, we show how cognitive radios can be organized to form a cooperative ad-hoc cognitive radio network that utilizes the available spectrum opportunistically and efficiently through channel allocation while at the same time avoiding causing interference to primary users as they become active. Our cognitive radios are Software Defined Radios consisting of a Linux laptop and a Universal Software Radio Peripheral integrated with our extended implementation of the GNU Radio software package and our Localized island Genetic Algorithm implementation for the channel allocation.","PeriodicalId":254380,"journal":{"name":"2009 5th International Conference on Testbeds and Research Infrastructures for the Development of Networks & Communities and Workshops","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127579434","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}
Pub Date : 2009-04-06DOI: 10.1109/TRIDENTCOM.2009.4976203
R. Chertov
In this report, we have focused on three link shaping methods: hidden delay bridge, router rate limiting, and pause frames. The focus of the study was to determine which method produced the specified delay and bandwidth limit. In addition, the study also took into consideration variance of inter-packet gaps (jitter). To obtain the results, we have created a variety of constantUDP flows and compared the performance of the link shapingmethods with each other. The results revealed that the delay bridge using the Click modular router is superior to the other two methods.
{"title":"High-fidelity link shaping","authors":"R. Chertov","doi":"10.1109/TRIDENTCOM.2009.4976203","DOIUrl":"https://doi.org/10.1109/TRIDENTCOM.2009.4976203","url":null,"abstract":"In this report, we have focused on three link shaping methods: hidden delay bridge, router rate limiting, and pause frames. The focus of the study was to determine which method produced the specified delay and bandwidth limit. In addition, the study also took into consideration variance of inter-packet gaps (jitter). To obtain the results, we have created a variety of constantUDP flows and compared the performance of the link shapingmethods with each other. The results revealed that the delay bridge using the Click modular router is superior to the other two methods.","PeriodicalId":254380,"journal":{"name":"2009 5th International Conference on Testbeds and Research Infrastructures for the Development of Networks & Communities and Workshops","volume":"618 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132602219","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}
Pub Date : 2009-04-06DOI: 10.1109/TRIDENTCOM.2009.4976247
D. Adami, A. Cheptsov, F. Davoli, Ioannis Liabotis, R. Pugliese, A. Zafeiropoulos
Much interest has arisen recently on the access to and management of remote instrumentation and laboratory equipment in general. The complexity of activities related to these topics can be summarized under the name of Remote Instrumentation Services, where the term “instrumentation” includes any kind of experimental equipment, and the term “services” underlines the general framework whereby the instrumental resources should be accessed (i.e., the Service Oriented Architecture). Building on the foundations of previous European projects, the aim of DORII (Deployment of Remote Instrumentation Infrastructure) is to build and operate a test bed addressing different areas of eScience. These include oceanographic applications, earthquake engineering, and large-scale physics experiments on synchrotron light. The paper describes the characteristics and the design of the test bed stemming from the applications' requirements, in terms of networking and middleware, and its current status of development.
{"title":"The DORII project test bed: Distributed eScience applications at work","authors":"D. Adami, A. Cheptsov, F. Davoli, Ioannis Liabotis, R. Pugliese, A. Zafeiropoulos","doi":"10.1109/TRIDENTCOM.2009.4976247","DOIUrl":"https://doi.org/10.1109/TRIDENTCOM.2009.4976247","url":null,"abstract":"Much interest has arisen recently on the access to and management of remote instrumentation and laboratory equipment in general. The complexity of activities related to these topics can be summarized under the name of Remote Instrumentation Services, where the term “instrumentation” includes any kind of experimental equipment, and the term “services” underlines the general framework whereby the instrumental resources should be accessed (i.e., the Service Oriented Architecture). Building on the foundations of previous European projects, the aim of DORII (Deployment of Remote Instrumentation Infrastructure) is to build and operate a test bed addressing different areas of eScience. These include oceanographic applications, earthquake engineering, and large-scale physics experiments on synchrotron light. The paper describes the characteristics and the design of the test bed stemming from the applications' requirements, in terms of networking and middleware, and its current status of development.","PeriodicalId":254380,"journal":{"name":"2009 5th International Conference on Testbeds and Research Infrastructures for the Development of Networks & Communities and Workshops","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121180676","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}
Pub Date : 2009-04-06DOI: 10.1109/TRIDENTCOM.2009.4976214
R. Good, N. Ventura
Policy Based Resource Management will form the cornerstone of service differentiation that will drive IMS service deployment. While the IMS specifications are largely finalized, the policy based QoS provisioning architecture still faces many deployment challenges including flexible, application driven policy control, end to end policy provisioning and policy refinement. To accelerate the maturity of this technology open test-beds are necessary to expose the complex systems to an open set of developers. This paper proposes a Multilayered Policy Control architecture that extends the general resource management function being standardized; this extended architecture gives application developers greater control over the way their services are treated in the transport layer. Furthermore the architecture is implemented in the form of a 3GPP compliant, open source and freely distributed test-bed architecture - the open areas of policy representation, application-policy interaction, policy profiling and policy refinement are addressed. This open test-bed will serve to foster innovation in the field, increase collaborative co-operation and accelerate the maturity of these technologies. The framework is subjected to vigorous validation and evaluation tests - while the effects the architecture has on session setup delay and signaling overhead are not insignificant they are found to be acceptable.
{"title":"Application driven Policy Based Resource Management for IP multimedia subsystems","authors":"R. Good, N. Ventura","doi":"10.1109/TRIDENTCOM.2009.4976214","DOIUrl":"https://doi.org/10.1109/TRIDENTCOM.2009.4976214","url":null,"abstract":"Policy Based Resource Management will form the cornerstone of service differentiation that will drive IMS service deployment. While the IMS specifications are largely finalized, the policy based QoS provisioning architecture still faces many deployment challenges including flexible, application driven policy control, end to end policy provisioning and policy refinement. To accelerate the maturity of this technology open test-beds are necessary to expose the complex systems to an open set of developers. This paper proposes a Multilayered Policy Control architecture that extends the general resource management function being standardized; this extended architecture gives application developers greater control over the way their services are treated in the transport layer. Furthermore the architecture is implemented in the form of a 3GPP compliant, open source and freely distributed test-bed architecture - the open areas of policy representation, application-policy interaction, policy profiling and policy refinement are addressed. This open test-bed will serve to foster innovation in the field, increase collaborative co-operation and accelerate the maturity of these technologies. The framework is subjected to vigorous validation and evaluation tests - while the effects the architecture has on session setup delay and signaling overhead are not insignificant they are found to be acceptable.","PeriodicalId":254380,"journal":{"name":"2009 5th International Conference on Testbeds and Research Infrastructures for the Development of Networks & Communities and Workshops","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124938591","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}
Pub Date : 2009-04-06DOI: 10.1109/TRIDENTCOM.2009.4976237
R. Mullins
IMS ARCS is an Industrial and Academic cooperative program conducting research in the area of IMS technology with a view to creating a body of intellectual property for the use of project partners, and serving as a case study on how to develop IMS end user and enabling services. The project employs the OpenIMS[1] testbed from Fraunhofer Fokus, as the basis for the development and execution of services, and has built upon the facilities available in the OpenIMS testbed, while attempting to add value to these through the development of enabling services. This paper describes a useful location aware service which can help a user maximise their use of public transport facilities in a city. The service is particularly focused on demonstrating how IMS technology can be used to help visually impaired users. IMS ARCS and its OpenIMS testbed are affiliated with the EU sponsored FP7 PanLab II project [2].
{"title":"A framework for the creation of end user and enabling services on IMS","authors":"R. Mullins","doi":"10.1109/TRIDENTCOM.2009.4976237","DOIUrl":"https://doi.org/10.1109/TRIDENTCOM.2009.4976237","url":null,"abstract":"IMS ARCS is an Industrial and Academic cooperative program conducting research in the area of IMS technology with a view to creating a body of intellectual property for the use of project partners, and serving as a case study on how to develop IMS end user and enabling services. The project employs the OpenIMS[1] testbed from Fraunhofer Fokus, as the basis for the development and execution of services, and has built upon the facilities available in the OpenIMS testbed, while attempting to add value to these through the development of enabling services. This paper describes a useful location aware service which can help a user maximise their use of public transport facilities in a city. The service is particularly focused on demonstrating how IMS technology can be used to help visually impaired users. IMS ARCS and its OpenIMS testbed are affiliated with the EU sponsored FP7 PanLab II project [2].","PeriodicalId":254380,"journal":{"name":"2009 5th International Conference on Testbeds and Research Infrastructures for the Development of Networks & Communities and Workshops","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126160292","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}
Pub Date : 2009-04-06DOI: 10.1109/TRIDENTCOM.2009.4976240
Nikolaos Frangiadakis, N. Roussopoulos
We present Pegasus, a system providing wireless connection roaming at high velocities over multiple interfaces. Our system operates over WiMax, as well as over “in situ” WiFi networks, while at the same time offering transparency to user level applications by allowing a single IP address per user, operating in a decentralized mode. One of our most important findings is that in a system where handoffs delay minimization is crucial, network information for user locations and used paths can be used for effective and balanced utilization of the available bandwidth. We exploit this by caching DHCP connections, which we store on the server, as well as selecting superior Access Points (AP) to use when clients handover. We use the our working testbed implementation on a simulation of mobility by cycling the client's among APs, and derive the resulting bandwidth for large file downloading and HTTP connections.
{"title":"A pegasus over WiFi and WiMax demo: Connectivity at high speeds","authors":"Nikolaos Frangiadakis, N. Roussopoulos","doi":"10.1109/TRIDENTCOM.2009.4976240","DOIUrl":"https://doi.org/10.1109/TRIDENTCOM.2009.4976240","url":null,"abstract":"We present Pegasus, a system providing wireless connection roaming at high velocities over multiple interfaces. Our system operates over WiMax, as well as over “in situ” WiFi networks, while at the same time offering transparency to user level applications by allowing a single IP address per user, operating in a decentralized mode. One of our most important findings is that in a system where handoffs delay minimization is crucial, network information for user locations and used paths can be used for effective and balanced utilization of the available bandwidth. We exploit this by caching DHCP connections, which we store on the server, as well as selecting superior Access Points (AP) to use when clients handover. We use the our working testbed implementation on a simulation of mobility by cycling the client's among APs, and derive the resulting bandwidth for large file downloading and HTTP connections.","PeriodicalId":254380,"journal":{"name":"2009 5th International Conference on Testbeds and Research Infrastructures for the Development of Networks & Communities and Workshops","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121820764","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}
Pub Date : 2009-04-06DOI: 10.1109/TRIDENTCOM.2009.4976222
Christopher G. Wilson, T. Roppel
Collaborating mobile robots equipped with WiFi transceivers are configured as a mobile ad-hoc network. Algorithms are developed to take advantage of the distributed processing capability inherent to multi-agent systems. The focus of this study will be to determine the optimal amount of communication which allows the robots to share a sufficiently detailed global map, while keeping their processing time and energy usage to a minimum. A hardware testbed is described, which will be used to examine these trade-offs in an indoor laboratory-scale test area. Single robot test results are presented.
{"title":"Low-cost wireless mobile ad-hoc network robotic testbed","authors":"Christopher G. Wilson, T. Roppel","doi":"10.1109/TRIDENTCOM.2009.4976222","DOIUrl":"https://doi.org/10.1109/TRIDENTCOM.2009.4976222","url":null,"abstract":"Collaborating mobile robots equipped with WiFi transceivers are configured as a mobile ad-hoc network. Algorithms are developed to take advantage of the distributed processing capability inherent to multi-agent systems. The focus of this study will be to determine the optimal amount of communication which allows the robots to share a sufficiently detailed global map, while keeping their processing time and energy usage to a minimum. A hardware testbed is described, which will be used to examine these trade-offs in an indoor laboratory-scale test area. Single robot test results are presented.","PeriodicalId":254380,"journal":{"name":"2009 5th International Conference on Testbeds and Research Infrastructures for the Development of Networks & Communities and Workshops","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124417132","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}
Pub Date : 2009-04-06DOI: 10.1109/TRIDENTCOM.2009.4976254
David Waiting, R. Good, R. Spiers, N. Ventura
The UCT IMS Client is a free open source implementation of a 3GPP IMS Client. The project was started with the goal of creating a flexible and extensible code base for researchers and industry specialists to use the many communication services offered by the IMS. Since its inception in 2006 the client has grown, both in terms of its stability and its feature set, and is used worldwide by IMS enthusiasts as a means to experiment with IMS without any associated risks or costs. This paper describes the history of the project, the software architecture, the supported services and provides results of the various interoperability tests that have been performed between the UCT IMS Client and other freely available IMS Clients.
{"title":"The UCT IMS client","authors":"David Waiting, R. Good, R. Spiers, N. Ventura","doi":"10.1109/TRIDENTCOM.2009.4976254","DOIUrl":"https://doi.org/10.1109/TRIDENTCOM.2009.4976254","url":null,"abstract":"The UCT IMS Client is a free open source implementation of a 3GPP IMS Client. The project was started with the goal of creating a flexible and extensible code base for researchers and industry specialists to use the many communication services offered by the IMS. Since its inception in 2006 the client has grown, both in terms of its stability and its feature set, and is used worldwide by IMS enthusiasts as a means to experiment with IMS without any associated risks or costs. This paper describes the history of the project, the software architecture, the supported services and provides results of the various interoperability tests that have been performed between the UCT IMS Client and other freely available IMS Clients.","PeriodicalId":254380,"journal":{"name":"2009 5th International Conference on Testbeds and Research Infrastructures for the Development of Networks & Communities and Workshops","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127086405","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}
Pub Date : 2009-04-06DOI: 10.1109/TRIDENTCOM.2009.4976230
Sherry Wang, Harold Zheng
Session Initiation Protocol (SIP) has potential to be selected as a control plane signaling protocol for delivering real-time multimedia applications in military networks. It is necessary to study behaviors of SIP and SIP-based real-time applications as well as to understand their limitations in a tactical network environment. The goals of this study are to assess SIP signaling protocol performance and SIP-based Voice over Internet Protocol (VoIP) performance in an emulated disadvantaged tactical edge network environment and to contribute some feasible solutions.
{"title":"SIP-based VoIP experiment for sisadvantaged tactical edge networks","authors":"Sherry Wang, Harold Zheng","doi":"10.1109/TRIDENTCOM.2009.4976230","DOIUrl":"https://doi.org/10.1109/TRIDENTCOM.2009.4976230","url":null,"abstract":"Session Initiation Protocol (SIP) has potential to be selected as a control plane signaling protocol for delivering real-time multimedia applications in military networks. It is necessary to study behaviors of SIP and SIP-based real-time applications as well as to understand their limitations in a tactical network environment. The goals of this study are to assess SIP signaling protocol performance and SIP-based Voice over Internet Protocol (VoIP) performance in an emulated disadvantaged tactical edge network environment and to contribute some feasible solutions.","PeriodicalId":254380,"journal":{"name":"2009 5th International Conference on Testbeds and Research Infrastructures for the Development of Networks & Communities and Workshops","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133614870","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：