Abstract
This paper proposes a Multi-access Edge Computing (MEC)-based delay-constrained k-hop-limited VANET data offloading method. In the proposed method, a vehicle X can launch the vehicle-to-vehicle-to-infrastructure (V2V2I) VANET data offload from the cellular network to the IEEE 802.11p/802.11bd Road Side Unit (RSU) when (i) X is not in the corresponding RSU's signal coverage and (ii) there is a multiple-hop vehicle-to-vehicle (V2V) path connecting X with a vehicle Y that is inside the RSU's signal coverage. The MEC paradigm is used to check whether a k-hop-limited V2V2I offloading path exists for vehicle X or not based on the periodically reported contexts from vehicles. In addition to use the V2V2I path's lifetime and quality to derive the suitable V2V2I offloading paths using the snapshot VANET topology on the time point of receiving X's reported context, this work proposed a scheme to derive the potential V2V2I paths that may exist in the future, i.e., in a constrained time interval, to find the better V2V2I offloading path. The performance evaluation shown that the proposed method outperforms the one that (i) only considers the data offloading path's lifetime or (ii) does not consider the candidate V2V2I offloading paths existed in the future.
Highlights
More and more research for techniques and applications/services of vehicular network, which has been called Vehicle Ad Hoc Network (VANET), Internet Of Vehicle (IOV), Connected Vehicle, etc., are under working because of the increasing interest of autonomous vehicles and smart vehicles [1]–[3]
The delay-constrained mechanism means that (i) the V2V2I paths that exist on the current time point Tc and (ii) those potential V2V2I paths that may exist in the following t time units, i.e., during the interval of [Tc, Tc + t], are considered as the potential candidates for finding the better V2V2I VANET offloading path
The Multi-access Edge Computing (MEC) server selects the most suitable V2V2I VANET offloading path, which has the best utility value, based on the networking topologies that can exist during the interval of [Tc, Tc + t]
Summary
More and more research for techniques and applications/services of vehicular network, which has been called Vehicle Ad Hoc Network (VANET), Internet Of Vehicle (IOV), Connected Vehicle, etc., are under working because of the increasing interest of autonomous vehicles and smart vehicles [1]–[3]. To have the higher utilization of IEEE 802.11p-based VANET data offloading, the following scenario, which is called V2V2I offloading, was proposed in [15]. Thereafter, after two time units, link S-G appears The MEC server selects the most suitable V2V2I VANET offloading path, which has the best utility value, based on the networking topologies that can exist during the interval of [Tc, Tc + t].
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