Location information is one of the most important contexts in the everyday life. By using smart phones, It is possible to obtain locations using GPS at most places outdoors. However, for indoors where GPS radio wave cannot reach, it is not easy to obtain precise locations, so various approaches are under active developments. PDR (Pedestrian Dead-Reckoning) can be considerd as a promising approach of the indoor location estimation. Using the acceleration/gyro sensor, built in the mobile terminal, PDR estimates the relative movement. It is not possible to know the absolute location by the PDR alone, but by combining with other location estimation methods, it has the potential to track the absolute location. By using specialized wearable devices, various kinds of PDR-enabled products have been proposed. However, for the current smart phones, it is not well-known about the PDR methods or algorithms with high precision and stability. Moreover, no evaluation method has been established for PDRs from various aspects.
At the opportunity of Ubicomp/ISWC 2015, we decided to make "PDR Challenge". Three categories have been prepared for the participants of this Challenge -- Algorithm, Evaluation Methods , and Exhibition. The participants of Algorithm Category will compete in PDR algorithm. Evaluation criteria of the proposed algorithms are not limited to position estimation accuracy, but including latency and power conservation. The participants of Evaluation Methods Cagetory will compete in the evaluation method of PDR. The participants of Exhibition demonstrate any kind of methods/products which utilize PDR but not limited. So any methods/products that have integration with the absolute location estimation methods and "map matching", using WiFi, etc.
PDR Algorithm(Prize: 50,000 Japanese Yen)
Carrying SmartPhones, subjects(from UbiComp/ISWC participants) will walk in the building, the Grand Front Osaka, which is the Ubicomp / ISWC workshop venue (8th Floor and a part of 7th Floor of Tower C). The floormap is here (10px=1m). Using the sensors that have been built in the SmartPhones, you will carry out PDR. Their results will be evaluated in the competition, based on multiple criteria, such as the precision with which the location has been determined, the robustness and power conservation, etc. We expect to have three types of target routes, each of which is about 100m. They will include movement along level ground, in addition to that toward higher ground, such as stairs, etc.
While walking, each subjects will have an assistant following him. They will enable him to navigate along the route correctly. In addition, the assistant will record the time taken to make each turn and will generate the correct coordinate information, based on that time. As for the method of participation, in addition to the methods for submitting the algorithm codes, we are considering the method for submitting only the position estimation results. We request those who are submitting only location estimation results to submit the correct coordinates, the walking sensing data which gave the information on the correct coordinates for the portion that the management had indicated. Please use the information on the correct coordinates for calibrations, etc. We will determine the winner, based on the precision of the information on the estimated position that has been submitted.
PDR Evaluation Method
The method of evaluating PDR has not yet been established at this time. Therefore, we will have the participants of this category to give presentations at the workshop day(Sep. 7th） by bringing with them their evaluation methods. The evaluation items are not limited to the position estimation accuracy. We are looking for the evaluation methods that have integrated multiple items, such as latency and power conservation, etc., as well as the evaluation methods, based on completely new criteria, etc. We will determine which evaluation method is the superior one, based on the votes of the Challenge Executive Committee and the participants of the workshop.
ExhibitionThe method of evaluating PDR has not yet been established at this time. Therefore, we will have the participants of this category to give presentations at the workshop day(Sep. 7th） by bringing with them their evaluation methods. The evaluation items are not limited to the position estimation accuracy. We are looking for the evaluation methods that have integrated multiple items, such as latency and power conservation, etc., as well as the evaluation methods, based on completely new criteria, etc. We will determine which evaluation method is the superior one, based on the votes of the Challenge Executive Committee and the participants of the workshop.
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PDR Challenge Sponsors
PDR Challenge Committee
PDR Challenge is currently managed by the follwing committee. We welcome researchers/industry members to join our committee.
Nobuo Kawaguchi (Nagoya University / Lisra)
Katsuhiko Kaji (Aichi Institute of Technology)
Nobuhiko Nishio (Ritsumeikan University)
Kaori Fujinami (Tokyo University of Agriculture and Technology)
Daniel Roggen (University of Sussex)
Sozo Inoue (Kyushu Institute of Technology)
Susanna Pirttikangas (University of Oulu)
Hisakazu Hada (Tokyo University of Technology)
Juan Antonio Alvarez Garcia (University of Seville)
Kazuya Murao (Kobe University)
Kei Hiroi (Nagoya University)
Ren Ohmura (Toyohashi University of Technology)
Shigeyuki Miyagi (The University of Shiga Prefecture)
Takeshi Kurata (National Institute of Advanced Industrial Science and Technology:AIST)
Yasuyuki Sumi (Future University Hakodate)
Yu Enokibori (Nagoya University)