Research Area:  Vehicular Ad Hoc Networks

Abstract:

This paper investigates how mobility affects the performance of a blockchain system operating in a vehicular ad hoc network (VANET). The mobility of nodes incurs a unique challenge to a blockchain system due to continuous change and dynamicity in the connectivity of the nodes. Specifically, the mobility makes a proof-of-work (PoW) process difficult since while moving the nodes can only have a limited length of time for a “rendezvous” to exchange a new block for verification. For this reason, accurate modeling for the block exchange behavior in a VANET is also challenging, which nevertheless has not been discussed in previous studies. Therefore, this paper provides an analysis framework that formulates the impact of mobility on a blockchain systems performance in a VANET based on three key metrics: (i) the probability of a successful addition of block to the chain; (ii) the stability of a rendezvous, and; (iii) the number of blocks exchanged during a rendezvous. The closed-form expressions and numerical results display the performance of a blockchain system in various scenarios in a VANET.

Keywords:  

Author(s) Name:  Seungmo Kim

Publisher name:  IEEE

DOI:  10.1109/ACCESS.2019.2918411

Volume Information:   ( Volume: 7) Page(s): 68646 - 68655

Paper Link:   https://ieeexplore.ieee.org/abstract/document/8720159