
180 Park Ave - Building 103
Florham Park, NJ
http://www.kiskeya.net/ramon/
Ramón Cáceres is an experimental researcher in computer systems and networks. His research interests include mobile and pervasive computing, wireless networking, virtualization, security, and privacy. He is an ACM Distinguished Scientist and holds a Ph.D. from the University of California at Berkeley. He was born and raised in Dominican Republic.
Ubicomp Systems at 20: Progress, Opportunities, and Challenges
Ramon Caceres, Adrian Friday
IEEE Pervasive Computing,
2012.
[PDF]
[BIB]
IEEE Copyright
This version of the work is reprinted here with permission of IEEE for your personal use. Not for redistribution. The definitive version was published in IEEE Pervasive Computing. , Volume 11, Issue 1, 2012-01-01
{Twenty years ago, Weiser set forth his compelling vision of ubiquitous computing (ubicomp), giving rise to a rich multifaceted area of research. This community spawned several major conferences, journals, and magazines, including IEEE Pervasive Computing ten years ago. At this milestone, we take stock of where ubicomp systems research has journeyed and postulate the major challenges going forward.}
Route Classification using Cellular Handoff Patterns
Christopher Volinsky, Alexander Varshavsky, Richard Becker, Ji Loh, Simon Urbanek, Ramon Caceres, Karrie Hanson
13th ACM International Conference on Ubiquitous Computing,
2011.
[PDF]
[BIB]
ACM Copyright
(c) ACM, 2011. This is the author's version of the work. It is posted here by permission of ACM for your personal use. Not for redistribution. The definitive version was published in 13th ACM International Conference on Ubiquitous Computing , 2011-09-01.
{Understanding utilization of city roads is important for urban planners. In this paper, we show how to use cellular hand- off patterns from cellular phone networks to identify which routes people take through a city. Specifically, this paper makes the following three contributions. First, we show that cellular handoff patterns on a given route are stable across a range of conditions and propose a way to measure stability within and between routes using a variant of Earth Mover�s Distance. Second, we present two accurate classification al- gorithms for matching cellular handoff patterns to routes: one requires test drives on the routes while the other uses signal strength data collected by high-resolution scanners. Finally, we present an application of our algorithms for mea- suring relative volumes of traffic on routes leading into and out of a specific city, and validate our methods using statis- tics published by a state transportation authority.}

Predicting Handoffs in 3G Networks
Ramon Caceres, Jeffrey Pang, Alexander Varshavsky, Umar Javed, Dongsu Han, Srinivasan Sesah
3rd ACM SOSP Workshop on Networking, Systems, and Applications on Mobile Handhelds (MobiHeld),
2011.
[PDF]
[BIB]
ACM Copyright
(c) ACM, 2011. This is the author's version of the work. It is posted here by permission of ACM for your personal use. Not for redistribution. The definitive version was published in 3rd ACM SOSP Workshop on Networking, Systems, and Applications on Mobile Handhelds (MobiHeld) , 2011-10-23.
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Clustering Anonymized Mobile Call Detail Records to Find Usage Groups
Christopher Volinsky, Richard Becker, Ramon Caceres, Karrie Hanson, Ji Loh, Simon Urbanek, Alexander Varshavsky
1st Workshop on Pervasive Urban Applications (PURBA),
2011.
[PDF]
[BIB]
Springer Copyright
The definitive version was published in PURBA-2011. , 2011-06-12
{Understanding the mix of different types of people in a city is an important input into urban planning. In this paper we identify distinct sectors of a population by their cellular phone usage. In a study of a small suburban city in New Jersey, we use unsupervised clustering to identify the usage patterns of heavy users . We uncover 7 unique usage patterns. We interpret two of the patterns as belonging to commuters and students, and verify these interpretations with deeper analysis of temporal and spatial patterns. }
A Tale of One City: Using Cellular Network Data for Urban Planning
Richard Becker, Ramon Caceres, Karrie Hanson, Ji Loh, Simon Urbanek, Alexander Varshavsky, Christopher Volinsky
IEEE Pervasive Computing ,
2010.
[PDF]
[BIB]
IEEE Copyright
The definitive version was published in IEEE Pervasive Computing , 2010-04-01, URL: https://ecopyright.ieee.org/ECTT/login.jsp Username: SCHPCSI-2011-01-0005 Password: 1295115660850
{The rapid growth of modern cities leaves urban planners faced with numerous challenges, such as high congestion and pollution levels. Effectively solving these challenges re- quires a deep understanding of existing city dynamics. In this paper, we describe methodology to study and monitor these dynamics by using Call Detail Records (CDRs), rou- tinely collected by wireless service providers as part of run- ning their networks. Our methodology scales to an entire population, has little additional cost, and can be continually updated. This provides an unprecedented opportunity to study and monitor cities in a way that current practices are not able to do.}
System And Method For Providing Wireless Services Within A Wireless Local Area Network,
December 27, 2011
The invention provides a system and method for providing a temporary wireless service connection to one or more users within a wireless local area network. In-building services and Internet related services are provided to the users over their respective temporary wireless service connections. Each user is charged for their specific usage amounts which may be based on the number of packets transferred, the number of bytes transferred, the number of distinct transactions and/or the time period each user's temporary wireless service connection was active.
System And Method For Providing Wireless Services Within A Wireless Local Area Network,
January 11, 2011
The invention provides a system and method for providing a temporary wireless service connection to one or more users within a wireless local area network. In-building services and Internet related services are provided to the users over their respective temporary wireless service connections. Each user is charged for their specific usage amounts which may be based on the number of packets transferred, the number of bytes transferred, the number of distinct transactions and/or the time period each user's temporary wireless service connection was active.
System And Method For Providing Wireless Services Within A Wireless Local Area Network,
October 13, 2009
The invention provides a system and method for providing a temporary wireless service connection to one or more users within a wireless local area network. In-building services and Internet related services are provided to the users over their respective temporary wireless service connections. Each user is charged for their specific usage amounts which may be based on the number of packets transferred, the number of bytes transferred, the number of distinct transactions and/or the time period each user's temporary wireless service connection was active.