Online Trichromatic Pickup and Delivery Scheduling in Spatial Crowdsourcing

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Author(s)
Zheng, Bolong
Huang, Chenze
Jensen, Christian S
Chen, Lu
Nguyen, Quoc Viet Hung
Liu, Guanfeng
Li, Guohui
Zheng, Kai
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2020
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Dallas, USA

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Abstract

In Pickup-and-Delivery problems (PDP), mobile workers are employed to pick up and deliver items with the goal of reducing travel and fuel consumption. Unlike most existing efforts that focus on finding a schedule that enables the delivery of as many items as possible at the lowest cost, we consider trichromatic (worker-item-task) utility that encompasses worker reliability, item quality, and task profitability. Moreover, we allow customers to specify keywords for desired items when they submit tasks, which may result in multiple pickup options, thus further increasing the difficulty of the problem. Specifically, we formulate the problem of Online Trichromatic Pickup and Delivery Scheduling (OTPD) that aims to find optimal delivery schedules with highest overall utility. In order to quickly respond to submitted tasks, we propose a greedy solution that finds the schedule with the highest utility-cost ratio. Next, we introduce a skyline kinetic tree-based solution that materializes intermediate results to improve the result quality. Finally, we propose a density-based grouping solution that partitions streaming tasks and efficiently assigns them to the workers with high overall utility. Extensive experiments with real and synthetic data offer evidence that the proposed solutions excel over baselines with respect to both effectiveness and efficiency.

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2020 IEEE 36th International Conference on Data Engineering (ICDE)

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© 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

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Data structures and algorithms

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Zheng, B; Huang, C; Jensen, CS; Chen, L; Nguyen, QVH; Liu, G; Li, G; Zheng, K, Online Trichromatic Pickup and Delivery Scheduling in Spatial Crowdsourcing, 2020 IEEE 36th International Conference on Data Engineering (ICDE), 2020, pp. 973-984