Publications - Pervasive Computing Laboratory

 Access control anotacionsemantica authentication Cloud computing coap compromise cryptography cynamon emadrid emrisco everyware home network I-Shaper identity management inrisco inteligenciafuentesabiertas Internet of Things IoT magos Pervasive computing privacy Protocols Qursa raudo2 Security Smart Card Trust management Ubisec VANETs 
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2012
 Rodriguez-Carrion, Alicia;  García-Rubio, Carlos;  Campo-Vázquez, Celeste;  Cortés, Alberto;  García-Lozano, Estrella
Study of LZ-Based Location Prediction and Its Application to Transportation Recommender Systems Journal Article 
In: Sensors , vol. 12, iss. 6, pp. 7496-7517, 2012, ISSN: 1424-8220.
Abstract | Links | BibTeX | Tags: active lezi, Ambient intelligence, españavirtual, gsm-based location, lezi update, lz, prediction, recommender system, Ubiquitous computing
@article{campo009b,

title = {Study of LZ-Based Location Prediction and Its Application to Transportation Recommender Systems},

author = {Alicia Rodriguez-Carrion and Carlos García-Rubio and Celeste Campo-Vázquez and Alberto Cortés and Estrella García-Lozano },

url = {http://hdl.handle.net/10016/27902},

doi = {https://doi.org/10.3390/s120607496},

issn = {1424-8220},

year  = {2012},

date = {2012-06-04},

urldate = {2012-06-04},

journal = {Sensors },

volume = {12},

issue = {6},

pages = {7496-7517},

abstract = {Predicting users' next location allows to anticipate their future context, thus providing additional time to be ready for that context and react consequently. This work is focused on a set of LZ-based algorithms (LZ, LeZi Update and Active LeZi) capable of learning mobility patterns and estimating the next location with low resource needs, which makes it possible to execute them on mobile devices. The original algorithms have been divided into two phases, thus being possible to mix them and check which combination is the best one to obtain better prediction accuracy or lower resource consumption. To make such comparisons, a set of GSM-based mobility traces of 95 different users is considered. Finally, a prototype for mobile devices that integrates the predictors in a public transportation recommender system is described in order to show an example of how to take advantage of location prediction in an ubiquitous computing environment.},

keywords = {active lezi, Ambient intelligence, españavirtual, gsm-based location, lezi update, lz, prediction, recommender system, Ubiquitous computing},

pubstate = {published},

tppubtype = {article}

}

Close
Predicting users' next location allows to anticipate their future context, thus providing additional time to be ready for that context and react consequently. This work is focused on a set of LZ-based algorithms (LZ, LeZi Update and Active LeZi) capable of learning mobility patterns and estimating the next location with low resource needs, which makes it possible to execute them on mobile devices. The original algorithms have been divided into two phases, thus being possible to mix them and check which combination is the best one to obtain better prediction accuracy or lower resource consumption. To make such comparisons, a set of GSM-based mobility traces of 95 different users is considered. Finally, a prototype for mobile devices that integrates the predictors in a public transportation recommender system is described in order to show an example of how to take advantage of location prediction in an ubiquitous computing environment.
Close
http://hdl.handle.net/10016/27902
doi:https://doi.org/10.3390/s120607496
Close
2011
 Rodriguez-Carrion, Alicia;  García-Rubio, Carlos;  Campo-Vázquez, Celeste;  Cortés, Alberto;  García-Lozano, Estrella;  Noriega-Vivas, Patricia
Analysis of Location Prediction Performance of LZ Algorithms using GSM Cell-based Location Data Conference 
5th International Symposium on Ubiquitous Computing and Ambient Intelligence (UCAMI 2011), UCAMI, 2011.
Abstract | Links | BibTeX | Tags: españavirtual, GSM, gsm-based location, lz, LZ Algorithms, prediction, predictions
@conference{campo024,

title = {Analysis of Location Prediction Performance of LZ Algorithms using GSM Cell-based Location Data},

author = {Alicia Rodriguez-Carrion and Carlos García-Rubio and Celeste Campo-Vázquez and Alberto Cortés and Estrella García-Lozano and Patricia Noriega-Vivas},

url = {https://hdl.handle.net/10016/13103

https://e-archivo.uc3m.es/bitstreams/66c1a251-8ce0-4a0f-b342-86a8b45e60e8/download},

year  = {2011},

date = {2011-12-20},

urldate = {2011-12-20},

booktitle = {5th International Symposium on Ubiquitous Computing and Ambient Intelligence (UCAMI 2011)},

publisher = {UCAMI},

abstract = {Predictions about users' next locations allow bringing forward their future context, thus having additional time to react. To make such predictions, algorithms capable of learning mobility patterns and estimating the next location are needed. This work is focused on making the predictions on mobile terminals, thus resource consumption being an important constraint. Among the predictors with low resource consumption, the family of LZ algorithms has been chosen to study their performance, analyzing the results drawn from processing location records of 95 users. The main contribution is to divide the algorithms into two phases, thus being possible to use the best combination to obtain better prediction accuracy or lower resource consumption.},

keywords = {españavirtual, GSM, gsm-based location, lz, LZ Algorithms, prediction, predictions},

pubstate = {published},

tppubtype = {conference}

}

Close
Predictions about users' next locations allow bringing forward their future context, thus having additional time to react. To make such predictions, algorithms capable of learning mobility patterns and estimating the next location are needed. This work is focused on making the predictions on mobile terminals, thus resource consumption being an important constraint. Among the predictors with low resource consumption, the family of LZ algorithms has been chosen to study their performance, analyzing the results drawn from processing location records of 95 users. The main contribution is to divide the algorithms into two phases, thus being possible to use the best combination to obtain better prediction accuracy or lower resource consumption.
Close
https://hdl.handle.net/10016/13103
https://e-archivo.uc3m.es/bitstreams/66c1a251-8ce0-4a0f-b342-86a8b45e60e8/downlo[...]
Close
2009
 Almenarez, Florina;  Arias, Patricia;  Marín, Andrés;  Díaz, Daniel
Towards dynamic trust establishment for identity federation Proceedings Article 
In: EATIS '09: Proceedings of the 2009 Euro American Conference on Telematics and Information Systems: New Opportunities to increase Digital Citizenship, pp. 1-4, 2009, ISBN: 9781605583983.
Abstract | Links | BibTeX | Tags: applied computing, enterprise computing, españavirtual, information system applications, information systems
@inproceedings{pa040,

title = {Towards dynamic trust establishment for identity federation},

author = {Florina Almenarez and Patricia Arias and Andrés Marín and Daniel Díaz },

url = {https://dl.acm.org/doi/10.1145/1551722.1551747

https://dl.acm.org/doi/pdf/10.1145/1551722.1551747},

doi = {https://doi.org/10.1145/1551722.1551747},

isbn = {9781605583983},

year  = {2009},

date = {2009-06-17},

urldate = {2009-06-17},

booktitle = {EATIS '09: Proceedings of the 2009 Euro American Conference on Telematics and Information Systems: New Opportunities to increase Digital Citizenship},

number = {25},

pages = {1-4},

abstract = {Federation has emerged as a key concept for identity management, as it is the basis to reduce complexity in the companies and improve user experience. However, the problem of establishing identity federations in dynamic open environments, where it is desirable to speed up the processes of service provisioning and deprovisioning, has not been fully addressed. This paper reviews the existing frameworks for identity federation, analyzing the underlying trust mechanisms and its suitability to be applied in the mentioned environments. Finally, we propose a generic extension for the Security Assertion Markup Language (SAML) standard in order to facilitate the creation of federation relationships in a secure dynamic way between prior unknown parties.},

keywords = {applied computing, enterprise computing, españavirtual, information system applications, information systems},

pubstate = {published},

tppubtype = {inproceedings}

}

Close
Federation has emerged as a key concept for identity management, as it is the basis to reduce complexity in the companies and improve user experience. However, the problem of establishing identity federations in dynamic open environments, where it is desirable to speed up the processes of service provisioning and deprovisioning, has not been fully addressed. This paper reviews the existing frameworks for identity federation, analyzing the underlying trust mechanisms and its suitability to be applied in the mentioned environments. Finally, we propose a generic extension for the Security Assertion Markup Language (SAML) standard in order to facilitate the creation of federation relationships in a secure dynamic way between prior unknown parties.
Close
https://dl.acm.org/doi/10.1145/1551722.1551747
https://dl.acm.org/doi/pdf/10.1145/1551722.1551747
doi:https://doi.org/10.1145/1551722.1551747
Close