Publication Type
Journal Article
Version
acceptedVersion
Publication Date
2-2018
Abstract
In this article, we investigate effective ways of utilizing crowdworkers in providing various urban services. The task recommendation platform that we design can match tasks to crowdworkers based on workers’ historical trajectories and time budget limits, thus making recommendations personal and efficient. One major challenge we manage to address is the handling of crowdworker’s trajectory uncertainties. In this article, we explicitly allow multiple routine routes to be probabilistically associated with each worker. We formulate this problem as an integer linear program whose goal is to maximize the expected total utility achieved by all workers. We further exploit the separable structures of the formulation and apply the Lagrangian relaxation technique to scale up computation. Numerical experiments have been performed over the instances generated using the realistic public transit dataset in Singapore. The results show that we can find significantly better solutions than the deterministic formulation, and in most cases we can find solutions that are very close to the theoretical performance limit. To demonstrate the practicality of our approach, we deployed our recommendation engine to a campus-scale field trial, and we demonstrate that workers receiving our recommendations incur fewer detours and complete more tasks, and are more efficient against workers relying on their own planning (25% more for top workers who receive recommendations). This is achieved despite having highly uncertain worker trajectories. We also demonstrate how to further improve the robustness of the system by using a simple multi-coverage mechanism.
Keywords
participatory sensing, Mobile crowdsourcing, uncertainty modeling, context-aware, empirical study, spatial crowdsourcing, user behavior
Discipline
Artificial Intelligence and Robotics | Computer Sciences | Operations Research, Systems Engineering and Industrial Engineering
Research Areas
Intelligent Systems and Optimization
Publication
ACM Transactions on Intelligent Systems and Technology
Volume
9
Issue
3
First Page
1
Last Page
24
ISSN
2157-6904
Identifier
10.1145/3078842
Publisher
ACM
Citation
CHENG, Shih-Fen; CHEN, Cen; KANDAPPU, Thivya; LAU, Hoong Chuin; MISRA, Archan; JAIMAN, Nikita; DARATAN, Randy Tandriansyah; and KOH, Desmond.
Scalable urban mobile crowdsourcing: Handling uncertainty in worker movement. (2018). ACM Transactions on Intelligent Systems and Technology. 9, (3), 1-24.
Available at: https://ink.library.smu.edu.sg/sis_research/3888
Copyright Owner and License
LARC and Authors
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-No Derivative Works 4.0 International License.
Additional URL
https://doi.org/10.1145/3078842
Included in
Artificial Intelligence and Robotics Commons, Operations Research, Systems Engineering and Industrial Engineering Commons