Reserve Margin Space for Broadcast Storm Mitigation in VANETs

摘要

In view to reduce accident risks on public roads, Wireless Access in a Vehicular Environment (WAVE) standard was developed to enable Inter-Vehicular Communication (IVC). Under WAVE, all involved node or mobile must exchange and share important information related to the road state in order to avoid accidents. In view to avoid the channel congestion of the limited bandwidth, the Distributed Congestion Control (DCC) algorithm was proposed by the standard. However, under a congested environment, broadcast storm naturally occurs and the proposed DCC becomes inefficient and in contrast, greatly contributes to the channel deterioration. This work presents the Improved Dynamic Broadcast Storm Mitigation Algorithm (IDBSMA) approach which could be used to cater for broadcast storm mitigation in VANETs. The embedded Reserve Margin Space (RMS) feature of the IDBSMA is also explored. The performance of the proposed approach is evaluated against the Dynamic Broadcast Storm Mitigation Algorithm (DBSMA). Result from simulations confirmed that not only can the IDBSMA cater for both CAMs/BSMs and DENMS message type at the same time, it also offers an outstanding performance over the DBSMA with more than 80% improved efficiency.