Towards Workload Balancing in Fog Computing Empowered IoT

Document Type

Article

Publication Date

1-1-2020

Abstract

As latency is the key performance metric for IoT applications, fog nodes co-located with cellular base stations can move the computing resources close to IoT devices. Therefore, data flows of IoT devices can be offloaded to fog nodes in their proximity, instead of the remote cloud, for processing. However, the latency of data flows in IoT devices consist of both the communications latency and computing latency. Owing to the spatial and temporal dynamics of IoT device distributions, some BSs and fog nodes are lightly loaded, while others, which may be overloaded, may incur congestion. Thus, the traffic load allocation among base stations (BSs) and computing load allocation among fog nodes affect the communications latency and computing latency of data flows, respectively. To solve this problem, we propose a workload balancing scheme in a fog network to minimize the latency of data flows in the communications and processing procedures by associating IoT devices to suitable BSs. We further prove the convergence and the optimality of the proposed workload balancing scheme. Through extensive simulations, we have compared the performance of the proposed load balancing scheme with other schemes and verified its advantages for fog networking.

Identifier

85049488948 (Scopus)

Publication Title

IEEE Transactions on Network Science and Engineering

External Full Text Location

https://doi.org/10.1109/TNSE.2018.2852762

e-ISSN

23274697

First Page

253

Last Page

262

Issue

1

Volume

7

Grant

1647170

Fund Ref

National Science Foundation

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