Improving location prediction services for new users with probabilistic latent semantic analysis
OA Location
Author(s)
McInerney, James
Rogers, Alex
Jennings, Nicholas R
Type
Conference Paper
Abstract
Location prediction systems that attempt to determine the mobility patterns of individuals in their daily lives have become increasingly common in recent years. Approaches to this prediction task include eigenvalue decomposition [5], non-linear time series analysis of arrival times [10], and variable order Markov models [1]. However, these approaches all assume sufficient sets of training data. For new users, by definition, this data is typically not available, leading to poor predictive performance. Given that mobility is a highly personal behaviour, this represents a significant barrier to entry. Against this background, we present a novel framework to enhance prediction using information about the mobility habits of existing users. At the core of the framework is a hierarchical Bayesian model, a type of probabilistic semantic analysis [7], representing the intuition that the temporal features of the new user?s location habits are likely to be similar to those of an existing user in the system. We evaluate this framework on the real life location habits of 38 users in the Nokia Lausanne dataset, showing that accuracy is improved by 16%, relative to the state of the art, when predicting the next location of new users.
Date Issued
2012-09
Citation
2012
Identifier
http://eprints.soton.ac.uk/342584/
Source
4th International Workshop on Location-Based Social Networks
Notes
keywords: knowledge representation and reasoning, geometric, spatial, and temporal reasoning, machine learning, data mining, machine learning, machine learning, reasoning under uncertainty, uncertainty in ai, machine learning, unsupervised learning
Publication Status
Unpublished