Hyunkyu Lee, Yongje Shin, Hyunsuk Choi, Euisin Lee, Soochang Park

KIPS Transactions on Computer and Communication Systems, Vol. 7, No. 6, pp. 137-144, Jun. 2018
10.3745/KTCCS.2018.7.6.137,   PDF Download:
Keywords: VEhicular Ad-Hoc Networks, Spatio-Temporal Data, Regional Caching
Abstract

Vehicular Ad-hoc Networks (VANETS) have enabled to provide a variety of applications such as accident notification, content usage, etc. These applications have spatio-temporal data which have an interesting region and a lifetime according to their properties. However, geocasting protocols to deliver data to an interesting region can provide data to all vehicles in the region through a single transmission only at the current time, but cannot provide data to vehicles passing through the region during the lifetime of the data. Thus, we propose a spatio-temporal geocasting protocol called STGP using a regional caching scheme to send data to vehicles in an interesting region during a data lifetime in VANETs. For efficient and reliable regional caching, the proposed protocol uses the beacon-based data sharing, the extra caching elimination, and the distance-based caching exchange. Simulation results verify that the proposed protocol achieves more reliable and efficient data delivery compared with the existing protocol.

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