While unstructured P2P systems have been embraced widely in mobile ad-hoc networks (MANETs), the applicability of structured approaches like distributed hash tables (DHTs) to such settings remains controversial. Existing research delivers promising empirical results addressing the concerns about performance, complexity, and reliability, but does not analyze the principles of combining DHTs and MANETs. This paper identifies and discusses the fundamental implications of non-infrastructural networks for DHTs and analyzes solutions to these challenges
{"title":"Adapting distributed hash tables for mobile ad hoc networks","authors":"T. Heer, S. Götz, S. Rieche, Klaus Wehrle","doi":"10.1109/PERCOMW.2006.16","DOIUrl":"https://doi.org/10.1109/PERCOMW.2006.16","url":null,"abstract":"While unstructured P2P systems have been embraced widely in mobile ad-hoc networks (MANETs), the applicability of structured approaches like distributed hash tables (DHTs) to such settings remains controversial. Existing research delivers promising empirical results addressing the concerns about performance, complexity, and reliability, but does not analyze the principles of combining DHTs and MANETs. This paper identifies and discusses the fundamental implications of non-infrastructural networks for DHTs and analyzes solutions to these challenges","PeriodicalId":250624,"journal":{"name":"Fourth Annual IEEE International Conference on Pervasive Computing and Communications Workshops (PERCOMW'06)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117001571","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 : 2006-03-13DOI: 10.1109/PERCOMW.2006.117
M. Shinohara, H. Hayashi, T. Hara, S. Nishio
In ad hoc networks, it is effective that each mobile host creates replicas of data items held by other hosts for improving data accessibility. However, a mobile host holding data items frequently accessed by other hosts needs to transmit them many times and consumes more power than other hosts. In this paper, we propose a replica allocation method for not only improving data accessibility but also balancing the power consumption among mobile hosts. In this method, each mobile host replicates data items considering their access frequencies, the numbers of their replicas, and the remaining amount of its battery. We present simulation results to evaluate the performance of our proposed method
{"title":"Replica allocation considering power consumption in mobile ad hoc networks","authors":"M. Shinohara, H. Hayashi, T. Hara, S. Nishio","doi":"10.1109/PERCOMW.2006.117","DOIUrl":"https://doi.org/10.1109/PERCOMW.2006.117","url":null,"abstract":"In ad hoc networks, it is effective that each mobile host creates replicas of data items held by other hosts for improving data accessibility. However, a mobile host holding data items frequently accessed by other hosts needs to transmit them many times and consumes more power than other hosts. In this paper, we propose a replica allocation method for not only improving data accessibility but also balancing the power consumption among mobile hosts. In this method, each mobile host replicates data items considering their access frequencies, the numbers of their replicas, and the remaining amount of its battery. We present simulation results to evaluate the performance of our proposed method","PeriodicalId":250624,"journal":{"name":"Fourth Annual IEEE International Conference on Pervasive Computing and Communications Workshops (PERCOMW'06)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114388480","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}
M. McLaughlin, Roger Zimmermann, Leslie S. Liu, Younbo Jung, W. Peng, Seung A. Jin, J. Stewart, S. Yeh, Weirong Zhu, Beomjoo Seo
Rapid technological advances have changed how many existing tasks are performed. For example, the combination of virtual environments and the Internet is presenting a powerful opportunity in the area of medical training and rehabilitation. Here we present our design and preliminary experience with a telehaptic environment augmented with a voice conferencing system. Initial tests are encouraging and reveal the promise of our system
{"title":"Integrated voice and haptic support for tele-rehabilitation","authors":"M. McLaughlin, Roger Zimmermann, Leslie S. Liu, Younbo Jung, W. Peng, Seung A. Jin, J. Stewart, S. Yeh, Weirong Zhu, Beomjoo Seo","doi":"10.1109/PERCOMW.2006.68","DOIUrl":"https://doi.org/10.1109/PERCOMW.2006.68","url":null,"abstract":"Rapid technological advances have changed how many existing tasks are performed. For example, the combination of virtual environments and the Internet is presenting a powerful opportunity in the area of medical training and rehabilitation. Here we present our design and preliminary experience with a telehaptic environment augmented with a voice conferencing system. Initial tests are encouraging and reveal the promise of our system","PeriodicalId":250624,"journal":{"name":"Fourth Annual IEEE International Conference on Pervasive Computing and Communications Workshops (PERCOMW'06)","volume":"64 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120990715","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}
Localization research has focused on improving the accuracy of pinpointing the physical location of a target. We think that the energy efficiency and the quality of the localization services (QoLS) are equally important properties of localization systems. We refer to the QoLS as the timely supply of the location information to the applications. Energy efficiency and quality are seemingly two contradictive goals in terms of determining the rate of triggering the localization systems to perform the necessary computation and communication. In that, a lower location sampling rate contributes to a lower level of energy consumption but in the meantime compromises the timeliness of acquiring the location information. Opting for energy efficient and quality localization services, we propose a mobility-aware mechanism that adapts the sampling rate to the target mobility. Results from our simulations confirm that the adaptive sampling approach is promising and effective
{"title":"Enabling energy-efficient and quality localization services","authors":"Tsung-Han Lin, Polly Huang, Hao-Hua Chu, Hsing-Hau Chen, Ju-Peng Chen","doi":"10.1109/PERCOMW.2006.50","DOIUrl":"https://doi.org/10.1109/PERCOMW.2006.50","url":null,"abstract":"Localization research has focused on improving the accuracy of pinpointing the physical location of a target. We think that the energy efficiency and the quality of the localization services (QoLS) are equally important properties of localization systems. We refer to the QoLS as the timely supply of the location information to the applications. Energy efficiency and quality are seemingly two contradictive goals in terms of determining the rate of triggering the localization systems to perform the necessary computation and communication. In that, a lower location sampling rate contributes to a lower level of energy consumption but in the meantime compromises the timeliness of acquiring the location information. Opting for energy efficient and quality localization services, we propose a mobility-aware mechanism that adapts the sampling rate to the target mobility. Results from our simulations confirm that the adaptive sampling approach is promising and effective","PeriodicalId":250624,"journal":{"name":"Fourth Annual IEEE International Conference on Pervasive Computing and Communications Workshops (PERCOMW'06)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129146211","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 : 2006-03-13DOI: 10.1109/PERCOMW.2006.135
Yong Liu, Kay Connelly
In the vision of ubiquitous computing, there are billions of context sources that continuously publish their contextual information, and even more user agents that search for and consume such information. These context producers and consumers form a large-scale, wide-area, context-aware network which is both dynamic and heterogeneous. Existing service discovery mechanisms do not address the unique challenges imposed by such environments. In this paper we identify these challenges and propose a large scale context service discovery infrastructure for context-aware computing. We describe an approach for context service discovery and description that addresses these challenges
{"title":"Towards wide area context-aware environments","authors":"Yong Liu, Kay Connelly","doi":"10.1109/PERCOMW.2006.135","DOIUrl":"https://doi.org/10.1109/PERCOMW.2006.135","url":null,"abstract":"In the vision of ubiquitous computing, there are billions of context sources that continuously publish their contextual information, and even more user agents that search for and consume such information. These context producers and consumers form a large-scale, wide-area, context-aware network which is both dynamic and heterogeneous. Existing service discovery mechanisms do not address the unique challenges imposed by such environments. In this paper we identify these challenges and propose a large scale context service discovery infrastructure for context-aware computing. We describe an approach for context service discovery and description that addresses these challenges","PeriodicalId":250624,"journal":{"name":"Fourth Annual IEEE International Conference on Pervasive Computing and Communications Workshops (PERCOMW'06)","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132608548","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 : 2006-03-13DOI: 10.1109/PERCOMW.2006.122
S. Repp, C. Meinel
In this paper, we present a general architecture and a new retrieval method for an educational system that is based on a knowledge base of existing recorded lectures. The extraction of metadata from the multimedia resources is one of the main parts of this paper. The recorded lectures are transcripted by an out-of-the-box speech recognition software. The speech recognition software generates a time stamp for each word. These resources are divided into clusters, marked by timestamps, so that search engines are able to find the exact position of particular information inside a course. Finally, a retrieval method is presented that allows users to find "example", "explanation", "overview", "repetition", "exercise" for a particular word or topic-word. This is useful for the student's learning process and allows easy navigation of the multimedia database for pervasive learning
{"title":"Semantic indexing for recorded educational lecture videos","authors":"S. Repp, C. Meinel","doi":"10.1109/PERCOMW.2006.122","DOIUrl":"https://doi.org/10.1109/PERCOMW.2006.122","url":null,"abstract":"In this paper, we present a general architecture and a new retrieval method for an educational system that is based on a knowledge base of existing recorded lectures. The extraction of metadata from the multimedia resources is one of the main parts of this paper. The recorded lectures are transcripted by an out-of-the-box speech recognition software. The speech recognition software generates a time stamp for each word. These resources are divided into clusters, marked by timestamps, so that search engines are able to find the exact position of particular information inside a course. Finally, a retrieval method is presented that allows users to find \"example\", \"explanation\", \"overview\", \"repetition\", \"exercise\" for a particular word or topic-word. This is useful for the student's learning process and allows easy navigation of the multimedia database for pervasive learning","PeriodicalId":250624,"journal":{"name":"Fourth Annual IEEE International Conference on Pervasive Computing and Communications Workshops (PERCOMW'06)","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132650913","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}
We propose a novel mechanism for authentication of flooded queries in sensor networks. Each sensor can verify with certain probability that the query is sent by the base station. Implicit cooperation between sensor nodes during the flooding process ensures that the propagation of fake queries is limited to a small part of the network
{"title":"Authenticated query flooding in sensor networks","authors":"Z. Benenson, L. Pimenidis, F. Freiling, S. Lucks","doi":"10.1109/PERCOMW.2006.23","DOIUrl":"https://doi.org/10.1109/PERCOMW.2006.23","url":null,"abstract":"We propose a novel mechanism for authentication of flooded queries in sensor networks. Each sensor can verify with certain probability that the query is sent by the base station. Implicit cooperation between sensor nodes during the flooding process ensures that the propagation of fake queries is limited to a small part of the network","PeriodicalId":250624,"journal":{"name":"Fourth Annual IEEE International Conference on Pervasive Computing and Communications Workshops (PERCOMW'06)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132168789","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 : 2006-03-13DOI: 10.1109/PERCOMW.2006.133
A. A. Gomes, A. Ziviani, N. A. D. S. E. Silva, R. A. Feijóo
After an acute myocardial infarction (AMI), the sooner the patient is approached, the greater are the chances that pharmacological therapy (using thrombolytics) be more effective than surgical intervention. Nevertheless, the thrombolytic therapy may have hazard effects on AMI patients that present any contraindication to it. As a consequence, paramedics usually hesitate about applying the thrombolytic therapy - preferring to immediately transfer patients to coronary care units (CCUs) - unless cardiologists support their decision. To cope with this scenario, we envision a ubiquitous telemedicine system for supporting cardiologists and paramedics in (i) the remote decision upon the eligibility of AMI patients to the thrombolytic therapy and (ii) the remote monitoring of patients being transferred, so-called In this paper, we present AToMS (AMI teleconsultation & monitoring), a system that makes extensive use of (possibly heterogeneous) wireless communication technology to allow its use by a paramedic at the location where the AMI patient is first assisted, thus reducing the delay between the onset of symptoms and the eventual application of proper treatment. All exchanged messages among paramedics and cardiologists are recorded, thus rendering a fully auditable system
{"title":"Towards a ubiquitous healthcare system for acute myocardial infarction patients in Brazil","authors":"A. A. Gomes, A. Ziviani, N. A. D. S. E. Silva, R. A. Feijóo","doi":"10.1109/PERCOMW.2006.133","DOIUrl":"https://doi.org/10.1109/PERCOMW.2006.133","url":null,"abstract":"After an acute myocardial infarction (AMI), the sooner the patient is approached, the greater are the chances that pharmacological therapy (using thrombolytics) be more effective than surgical intervention. Nevertheless, the thrombolytic therapy may have hazard effects on AMI patients that present any contraindication to it. As a consequence, paramedics usually hesitate about applying the thrombolytic therapy - preferring to immediately transfer patients to coronary care units (CCUs) - unless cardiologists support their decision. To cope with this scenario, we envision a ubiquitous telemedicine system for supporting cardiologists and paramedics in (i) the remote decision upon the eligibility of AMI patients to the thrombolytic therapy and (ii) the remote monitoring of patients being transferred, so-called In this paper, we present AToMS (AMI teleconsultation & monitoring), a system that makes extensive use of (possibly heterogeneous) wireless communication technology to allow its use by a paramedic at the location where the AMI patient is first assisted, thus reducing the delay between the onset of symptoms and the eventual application of proper treatment. All exchanged messages among paramedics and cardiologists are recorded, thus rendering a fully auditable system","PeriodicalId":250624,"journal":{"name":"Fourth Annual IEEE International Conference on Pervasive Computing and Communications Workshops (PERCOMW'06)","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133858274","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}
Writing software for sensor networks requires full understanding of the physical phenomenon under observation. Nevertheless, in many cases knowing the details of the area of operation is difficult or unfeasible. This leads to the necessity of configuring and tuning the application executed on the sensor nodes even after the network has been deployed. We present a solution where a layer of computation is inserted between the application and the sensing equipment. This layer acts like a tiny interpreter and can be used to customize the behavior of already running applications. Experimental validation of the architecture and examples of use are also shown
{"title":"Configuration and tuning of sensor network applications through virtual sensors","authors":"P. Corsini, P. Masci, Alessio Vecchio","doi":"10.1109/PERCOMW.2006.32","DOIUrl":"https://doi.org/10.1109/PERCOMW.2006.32","url":null,"abstract":"Writing software for sensor networks requires full understanding of the physical phenomenon under observation. Nevertheless, in many cases knowing the details of the area of operation is difficult or unfeasible. This leads to the necessity of configuring and tuning the application executed on the sensor nodes even after the network has been deployed. We present a solution where a layer of computation is inserted between the application and the sensing equipment. This layer acts like a tiny interpreter and can be used to customize the behavior of already running applications. Experimental validation of the architecture and examples of use are also shown","PeriodicalId":250624,"journal":{"name":"Fourth Annual IEEE International Conference on Pervasive Computing and Communications Workshops (PERCOMW'06)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133549809","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 : 2006-03-13DOI: 10.1109/PERCOMW.2006.113
S. Gupta, T. Mukherjee, K. Venkatasubramanian, T. B. Taylor
In this paper, we propose a proximity based automated access control (PBAC) model for smart-ED environments which improves the existing ED work-flow by automating mundane administrative procedure for secure information access, allowing caregivers to focus on the treatment of patients. The proposed access model builds on the traditional role-based access control model and extends it by including multiple authentication levels for preventing unauthorized access. We also provide a semi-formal specification for the PBAC model. We further validate it using ultra-wide-band (UWB) based prototype which was tested in ED
{"title":"Proximity based access control in smart-emergency departments","authors":"S. Gupta, T. Mukherjee, K. Venkatasubramanian, T. B. Taylor","doi":"10.1109/PERCOMW.2006.113","DOIUrl":"https://doi.org/10.1109/PERCOMW.2006.113","url":null,"abstract":"In this paper, we propose a proximity based automated access control (PBAC) model for smart-ED environments which improves the existing ED work-flow by automating mundane administrative procedure for secure information access, allowing caregivers to focus on the treatment of patients. The proposed access model builds on the traditional role-based access control model and extends it by including multiple authentication levels for preventing unauthorized access. We also provide a semi-formal specification for the PBAC model. We further validate it using ultra-wide-band (UWB) based prototype which was tested in ED","PeriodicalId":250624,"journal":{"name":"Fourth Annual IEEE International Conference on Pervasive Computing and Communications Workshops (PERCOMW'06)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123316336","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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