Pub Date : 2013-04-15DOI: 10.1109/SysCon.2013.6549865
K. Nagothu, B. Kelley, M. Jamshidi
We present novel opportunistic interference aware scheduling (IAS) for dynamic channel allocation reuse to dynamically allocate new channels in unplanned networks. We introduce high levels of co-channel interferers with coordinated spatial signatures. We view this as likely system scenario for cognitive radio (CR) networks based upon IEEE 802.22 and moreover support smart grid, information networks. The proposed algorithm cooperatively allocates MIMO-channels to users based on spatial separability criterion that we introduce. We derive the MIMO beamforming coefficients that optimally reduce spatial interference. Finally, simulation results indicating sizeable increases in the multiuser capacity are possible to support smart grid information networks.
{"title":"MIMO-interference aware scheduling enabling the allocation of unbounded co-channels in unplanned networks","authors":"K. Nagothu, B. Kelley, M. Jamshidi","doi":"10.1109/SysCon.2013.6549865","DOIUrl":"https://doi.org/10.1109/SysCon.2013.6549865","url":null,"abstract":"We present novel opportunistic interference aware scheduling (IAS) for dynamic channel allocation reuse to dynamically allocate new channels in unplanned networks. We introduce high levels of co-channel interferers with coordinated spatial signatures. We view this as likely system scenario for cognitive radio (CR) networks based upon IEEE 802.22 and moreover support smart grid, information networks. The proposed algorithm cooperatively allocates MIMO-channels to users based on spatial separability criterion that we introduce. We derive the MIMO beamforming coefficients that optimally reduce spatial interference. Finally, simulation results indicating sizeable increases in the multiuser capacity are possible to support smart grid information networks.","PeriodicalId":218073,"journal":{"name":"2013 IEEE International Systems Conference (SysCon)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121655552","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 : 2013-04-15DOI: 10.1109/SysCon.2013.6549908
Andre M. Mayers, P. Benavidez, G. Raju, D. Akopian, M. Jamshidi
Personal Area Network (PAN) Devices are often components of communication systems which opportunistically access the wireless spectrum. As such, they must operate without presenting interference to licensed users, while meeting their individual, varied Quality of Service (QoS) requirements. In this paper we use a novel Transmit Power Control (TPC) algorithm to reduce interference. In theory, over the life of a Secondary User's (SU's) transmission, there is an optimal power time curve reflective of the minimum amount of power necessary with which a device can transmit while maintaining acceptable BER, and practicing Interference Avoidance (IA). Using the response of the algorithm to instantaneous channel conditions as well as an iteratively updated QoS benchmark, we obtain a quadratic approximation of the desired power-time curve. Stability of the quadratic approximation is demonstrated through Matlab simulations using critical valued inputs to the approximator. From our results, we also show that our quadratic approximator outperforms others of different orders in terms of reduction in sensitivities to relatively small changes in inputs, and better tracking performance in following reference desired power curves used in the simulations. Our algorithm reduces transmit power (and thus interference) by approximately 3.5 dB compared to conventional methods while maintaining the required QoS.
{"title":"A novel BER-feedback power control algorithm for Personal Area Network Devices","authors":"Andre M. Mayers, P. Benavidez, G. Raju, D. Akopian, M. Jamshidi","doi":"10.1109/SysCon.2013.6549908","DOIUrl":"https://doi.org/10.1109/SysCon.2013.6549908","url":null,"abstract":"Personal Area Network (PAN) Devices are often components of communication systems which opportunistically access the wireless spectrum. As such, they must operate without presenting interference to licensed users, while meeting their individual, varied Quality of Service (QoS) requirements. In this paper we use a novel Transmit Power Control (TPC) algorithm to reduce interference. In theory, over the life of a Secondary User's (SU's) transmission, there is an optimal power time curve reflective of the minimum amount of power necessary with which a device can transmit while maintaining acceptable BER, and practicing Interference Avoidance (IA). Using the response of the algorithm to instantaneous channel conditions as well as an iteratively updated QoS benchmark, we obtain a quadratic approximation of the desired power-time curve. Stability of the quadratic approximation is demonstrated through Matlab simulations using critical valued inputs to the approximator. From our results, we also show that our quadratic approximator outperforms others of different orders in terms of reduction in sensitivities to relatively small changes in inputs, and better tracking performance in following reference desired power curves used in the simulations. Our algorithm reduces transmit power (and thus interference) by approximately 3.5 dB compared to conventional methods while maintaining the required QoS.","PeriodicalId":218073,"journal":{"name":"2013 IEEE International Systems Conference (SysCon)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121957502","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 : 2013-04-15DOI: 10.1109/SysCon.2013.6549933
C. Uphoff, Daniel Mueller-Gritschneder, Ulf Schlichtmann
A common problem in system design is a lack of knowledge about the system parameters in early design stages. This results in epistemic uncertainty in the systems performance. Classic probability theory imposes unfavourable restrictions for the evaluation of different system realisations under epistemic uncertainty. An alternative mathematical approach is Dempster-Shafer Theory. In this paper we investigate the integration of Dempster-Shafer Theory in the Longest Processing Time algorithm, which is a heuristic for task mapping in embedded system design. The algorithm accepts uncertain estimates of processor speeds and task complexities. It can produce several plausible task mappings based on a degree of pessimism. We propose two criteria to compare these mappings in terms of performance and risk. Moreover we propose an approximation for arithmetic operations on Dempster-Shafer structures, which makes these tractable.
{"title":"Application of Dempster-Shafer Theory to task mapping under epistemic uncertainty","authors":"C. Uphoff, Daniel Mueller-Gritschneder, Ulf Schlichtmann","doi":"10.1109/SysCon.2013.6549933","DOIUrl":"https://doi.org/10.1109/SysCon.2013.6549933","url":null,"abstract":"A common problem in system design is a lack of knowledge about the system parameters in early design stages. This results in epistemic uncertainty in the systems performance. Classic probability theory imposes unfavourable restrictions for the evaluation of different system realisations under epistemic uncertainty. An alternative mathematical approach is Dempster-Shafer Theory. In this paper we investigate the integration of Dempster-Shafer Theory in the Longest Processing Time algorithm, which is a heuristic for task mapping in embedded system design. The algorithm accepts uncertain estimates of processor speeds and task complexities. It can produce several plausible task mappings based on a degree of pessimism. We propose two criteria to compare these mappings in terms of performance and risk. Moreover we propose an approximation for arithmetic operations on Dempster-Shafer structures, which makes these tractable.","PeriodicalId":218073,"journal":{"name":"2013 IEEE International Systems Conference (SysCon)","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133178474","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 : 2013-04-15DOI: 10.1109/SysCon.2013.6549888
Y. Karam, T. Baker, Azzelerabe Taleb Bendiab
Due to high complexity and heterogeneity of cloud environment, and this had interchangeably been imposed by a plethora of socially co-engineered cloud application architectures, designers are yet facing difficulties in choosing from approaches to model transformation between multiple domains solutions. In fact most of cloud based application development became hectic due to overwhelming number of layers which interrelate to significant application problem area. Such newly growing challenges had demanded to choose more cost effective ways of how to elicit efficient solutions that can articulate several types of requirements. Focusing on high level conceptual views; this paper introduces a new dynamic domain driven design method, which serves self-optimizing of socially interacted organizational patterns in cloud based environment. Such method helps to describe user aspects of tackled domains and problems to be solved rather than being concerned about choosing which program model should be used to satisfy features, goals and objectives for such software application.
{"title":"Support for self-optimized organizational patterns in socio-driven elastic clouds","authors":"Y. Karam, T. Baker, Azzelerabe Taleb Bendiab","doi":"10.1109/SysCon.2013.6549888","DOIUrl":"https://doi.org/10.1109/SysCon.2013.6549888","url":null,"abstract":"Due to high complexity and heterogeneity of cloud environment, and this had interchangeably been imposed by a plethora of socially co-engineered cloud application architectures, designers are yet facing difficulties in choosing from approaches to model transformation between multiple domains solutions. In fact most of cloud based application development became hectic due to overwhelming number of layers which interrelate to significant application problem area. Such newly growing challenges had demanded to choose more cost effective ways of how to elicit efficient solutions that can articulate several types of requirements. Focusing on high level conceptual views; this paper introduces a new dynamic domain driven design method, which serves self-optimizing of socially interacted organizational patterns in cloud based environment. Such method helps to describe user aspects of tackled domains and problems to be solved rather than being concerned about choosing which program model should be used to satisfy features, goals and objectives for such software application.","PeriodicalId":218073,"journal":{"name":"2013 IEEE International Systems Conference (SysCon)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134057012","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 : 2013-04-15DOI: 10.1109/SysCon.2013.6549879
L. Benetazzo, Attilio Licciardello, Mauro Franchin, R. Tittoto
This paper introduces a service approach, called Functional Collaboration System (FCS), that allows complex system organizations to communicate between parties using mobile devices. In many organizations and workflows lots of time is spent to find out, when needed, the right person with the right skills. A typical search activity involves several people and phone calls in order to identify the right person that is available at the right time and in the right place. People involved in the search process might be interrupted while performing other tasks, thus increasing inefficiency. Functional collaboration system is an easy to use yet effective solution that provides skill search functionalities combined with workforce management, presence and instant messaging, thus enabling fast connections between workers, based on their availability, function, skill and position. The proposed approach is based on international standards, assuring interoperability with any existing ICT infrastructure and guaranteeing deployments on premises and also cloud based service delivery.
{"title":"Functional collaboration A framework to increase system management efficiency","authors":"L. Benetazzo, Attilio Licciardello, Mauro Franchin, R. Tittoto","doi":"10.1109/SysCon.2013.6549879","DOIUrl":"https://doi.org/10.1109/SysCon.2013.6549879","url":null,"abstract":"This paper introduces a service approach, called Functional Collaboration System (FCS), that allows complex system organizations to communicate between parties using mobile devices. In many organizations and workflows lots of time is spent to find out, when needed, the right person with the right skills. A typical search activity involves several people and phone calls in order to identify the right person that is available at the right time and in the right place. People involved in the search process might be interrupted while performing other tasks, thus increasing inefficiency. Functional collaboration system is an easy to use yet effective solution that provides skill search functionalities combined with workforce management, presence and instant messaging, thus enabling fast connections between workers, based on their availability, function, skill and position. The proposed approach is based on international standards, assuring interoperability with any existing ICT infrastructure and guaranteeing deployments on premises and also cloud based service delivery.","PeriodicalId":218073,"journal":{"name":"2013 IEEE International Systems Conference (SysCon)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132818674","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 : 2013-04-15DOI: 10.1109/SysCon.2013.6549860
G. Cao, Y. Duan
IT business value has been mostly conceptualized and examined based on pairwise relationships. This study argues that examining IT business value needs to consider the emergent properties generated from a firm as a whole system. Drawing on systems thinking and the resource-based view of the firm, this study develops a systemic model of IT business value and posits that IT impacts on firm performance when systemic capabilities as emergent properties are generated from the interactions among IT and organizational factors. The performance impact will be positive when IT and organizational factors work together or negative when they work counteractively. Relating IT business value to emergent properties makes a fresh contribution to the literature since IT business value has rarely been conceptualized at the systems level. Further, linking systemic capabilities at the systems level to the valuable, rare, inimitable, and non-substitutable conditions will help explain sustained competitive advantage. This paper also contributes to systems thinking by demonstrating its value as a conceptual lens through which the nature of IT business value can be understood.
{"title":"Systemic capabilities as emergent properties: The source of IT business value","authors":"G. Cao, Y. Duan","doi":"10.1109/SysCon.2013.6549860","DOIUrl":"https://doi.org/10.1109/SysCon.2013.6549860","url":null,"abstract":"IT business value has been mostly conceptualized and examined based on pairwise relationships. This study argues that examining IT business value needs to consider the emergent properties generated from a firm as a whole system. Drawing on systems thinking and the resource-based view of the firm, this study develops a systemic model of IT business value and posits that IT impacts on firm performance when systemic capabilities as emergent properties are generated from the interactions among IT and organizational factors. The performance impact will be positive when IT and organizational factors work together or negative when they work counteractively. Relating IT business value to emergent properties makes a fresh contribution to the literature since IT business value has rarely been conceptualized at the systems level. Further, linking systemic capabilities at the systems level to the valuable, rare, inimitable, and non-substitutable conditions will help explain sustained competitive advantage. This paper also contributes to systems thinking by demonstrating its value as a conceptual lens through which the nature of IT business value can be understood.","PeriodicalId":218073,"journal":{"name":"2013 IEEE International Systems Conference (SysCon)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134270359","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 : 2013-04-15DOI: 10.1109/SysCon.2013.6549927
W. Vaneman, Roger D. Jaskot
Net-centricity is forcing the evolution of system of systems (SoS). One aspect of SoS that has been essentially ignored is SoS governance. Governance is the set of rules, policies, and decision-making criteria that will guide the SoS to achieving its goals and objectives. In this paper, we join the attributes of governance practices found in the IT community with known SoS types and characteristics to develop a criteria-based framework for SoS governance.
{"title":"A criteria-based framework for establishing system of systems governance","authors":"W. Vaneman, Roger D. Jaskot","doi":"10.1109/SysCon.2013.6549927","DOIUrl":"https://doi.org/10.1109/SysCon.2013.6549927","url":null,"abstract":"Net-centricity is forcing the evolution of system of systems (SoS). One aspect of SoS that has been essentially ignored is SoS governance. Governance is the set of rules, policies, and decision-making criteria that will guide the SoS to achieving its goals and objectives. In this paper, we join the attributes of governance practices found in the IT community with known SoS types and characteristics to develop a criteria-based framework for SoS governance.","PeriodicalId":218073,"journal":{"name":"2013 IEEE International Systems Conference (SysCon)","volume":"256 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133337776","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 : 2013-04-15DOI: 10.1109/SysCon.2013.6549936
M. Foehr, T. Jäger, C. Turrin, P. Petrali, A. Pagani, P. Leitão
The present paper deals with the question how system quality can be influenced within its engineering and manufacturing. It focuses on discrete manufacturing by system of systems and presents a methodology to gather and analyze relevant influences on system quality within a MPFQ-model. The model is based on four main elements: Materials, Processes, Functions and Quality. The paper brings together functional design/thinking in system of systems engineering with system engineering and manufacturing design. It will show the basic architecture behind the MPFQ model and how quality influences can be methodically detected. Afterwards the application of the MPFQ-model will be shown and benefits will be evaluated.
{"title":"Methodology for consideration of system quality within manufacturing","authors":"M. Foehr, T. Jäger, C. Turrin, P. Petrali, A. Pagani, P. Leitão","doi":"10.1109/SysCon.2013.6549936","DOIUrl":"https://doi.org/10.1109/SysCon.2013.6549936","url":null,"abstract":"The present paper deals with the question how system quality can be influenced within its engineering and manufacturing. It focuses on discrete manufacturing by system of systems and presents a methodology to gather and analyze relevant influences on system quality within a MPFQ-model. The model is based on four main elements: Materials, Processes, Functions and Quality. The paper brings together functional design/thinking in system of systems engineering with system engineering and manufacturing design. It will show the basic architecture behind the MPFQ model and how quality influences can be methodically detected. Afterwards the application of the MPFQ-model will be shown and benefits will be evaluated.","PeriodicalId":218073,"journal":{"name":"2013 IEEE International Systems Conference (SysCon)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126142065","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 : 2013-04-15DOI: 10.1109/SysCon.2013.6549897
Pierre-Yves Piriou, J. Faure, G. Deleuze
In order to overcome the increasing difficulty of critical systems development, integrating the safety concerns into Systems Engineering processes seems to be the relevant solution. This paper proposes a meta-model to perform this integration by considering phased mission systems composed of repairable components. This kind of system requires in particular that several redundancy policies be defined. The benefits of this contribution are illustrated on a small example from the domain of electric power production.
{"title":"A meta-model for integrating safety concerns into systems engineering processes","authors":"Pierre-Yves Piriou, J. Faure, G. Deleuze","doi":"10.1109/SysCon.2013.6549897","DOIUrl":"https://doi.org/10.1109/SysCon.2013.6549897","url":null,"abstract":"In order to overcome the increasing difficulty of critical systems development, integrating the safety concerns into Systems Engineering processes seems to be the relevant solution. This paper proposes a meta-model to perform this integration by considering phased mission systems composed of repairable components. This kind of system requires in particular that several redundancy policies be defined. The benefits of this contribution are illustrated on a small example from the domain of electric power production.","PeriodicalId":218073,"journal":{"name":"2013 IEEE International Systems Conference (SysCon)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130361333","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 : 2013-04-15DOI: 10.1109/SysCon.2013.6549878
P. S. Pillai, Shrisha Rao
Resource allocation involves assigning resources optimally and economically. In systems such as large server farms, where the demand for resources like the CPU, memory, hard-disk, or even software applications is far beyond the capabilities of a single machine, resource management involving a multitude of resources is necessary. A part of this resource management activity is resource allocation. We present a model-driven approach for optimizing resource allocation in server farms. Coalitions of servers are formed to address requests which demand capabilities beyond those of a single system. We formulate the formation of server coalitions as multiple instances of two-player zero-sum games between the servers and the task scheduler of the server farm. This two-player zero-sum game can be solved using the uncertainty principle of game theory.
{"title":"A resource allocation mechanism using coalition formation and the uncertainty principle of game theory","authors":"P. S. Pillai, Shrisha Rao","doi":"10.1109/SysCon.2013.6549878","DOIUrl":"https://doi.org/10.1109/SysCon.2013.6549878","url":null,"abstract":"Resource allocation involves assigning resources optimally and economically. In systems such as large server farms, where the demand for resources like the CPU, memory, hard-disk, or even software applications is far beyond the capabilities of a single machine, resource management involving a multitude of resources is necessary. A part of this resource management activity is resource allocation. We present a model-driven approach for optimizing resource allocation in server farms. Coalitions of servers are formed to address requests which demand capabilities beyond those of a single system. We formulate the formation of server coalitions as multiple instances of two-player zero-sum games between the servers and the task scheduler of the server farm. This two-player zero-sum game can be solved using the uncertainty principle of game theory.","PeriodicalId":218073,"journal":{"name":"2013 IEEE International Systems Conference (SysCon)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130387377","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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