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Sensors 2016, 16(9), 1523; doi:10.3390/s16091523

Friendly-Sharing: Improving the Performance of City Sensoring through Contact-Based Messaging Applications

Department of Computing Engineering, Universitat Politècnica de València, Valencia 46022, Spain
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Academic Editors: Andrea Zanella and Toktam Mahmoodi
Received: 12 July 2016 / Revised: 9 September 2016 / Accepted: 13 September 2016 / Published: 18 September 2016
(This article belongs to the Special Issue Smart City: Vision and Reality)
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Abstract

Regular citizens equipped with smart devices are being increasingly used as “sensors” by Smart Cities applications. Using contacts among users, data in the form of messages is obtained and shared. Contact-based messaging applications are based on establishing a short-range communication directly between mobile devices, and on storing the messages in these devices for subsequent delivery to cloud-based services. An effective way to increase the number of messages that can be shared is to increase the contact duration. We thus introduce the Friendly-Sharing diffusion approach, where, during a contact, the users are aware of the time needed to interchange the messages stored in their buffers, and they can thus decide to wait more time in order to increase the message sharing probability. The performance of this approach is anyway closely related to the size of the buffer in the device. We therefore compare various policies either for the message selection at forwarding times and for message dropping when the buffer is full. We evaluate our proposal with a modified version of the Opportunistic Networking Environment (ONE) simulator and using real human mobility traces. View Full-Text
Keywords: smart cities; human sensors; opportunistic networks; enabling communication technology smart cities; human sensors; opportunistic networks; enabling communication technology
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Herrera-Tapia, J.; Hernández-Orallo, E.; Tomás, A.; Manzoni, P.; Tavares Calafate, C.; Cano, J.-C. Friendly-Sharing: Improving the Performance of City Sensoring through Contact-Based Messaging Applications. Sensors 2016, 16, 1523.

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