A Novel Cooperative Roadside Unit Broadcast Approach for Future Intelligent Transportation Networks

Document Type

Article

Publication Date

1-1-2025

Abstract

In this paper, we propose a novel cooperative roadside unit (RSU) broadcast approach that can effectively enhance the vehicles’ packet-reception rates of the messages broadcast cooperatively by nearby RSUs. To enable message-aggregation among RSUs, we propose a new vehicular-message format based on the software-defined multiplexing code which can aggregate multiple messages without any need of packet form. To facilitate our proposed new cooperative scheme, RSUs must be organized into clusters. We formulate this RSU clustering problem as a graph partitioning problem, which aims to make individual cluster sizes as close to each other as possible. Furthermore, we design a new heuristic algorithm to efficiently solve this problem. This heuristic algorithm is also compared with the random clustering and minimum-degree clustering schemes in terms of the modified Gini index. The theoretical analysis of our proposed cooperative RSU broadcast scheme is also conducted to guarantee that our proposed new cooperative RSU-broadcast approach can improve the packet reception rate. Furthermore, we simulate the vehicular environment with the simulation tools SUMO and NS-3 as benchmarks. The simulation demonstrates that our proposed new cooperative RSU-broadcast system will increase the packet reception rate and the number of successfully received packets over the conventional non-cooperative broadcast system.

Publication Title

IEEE Transactions on Intelligent Transportation Systems

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