Software/Hardware Co-design for Multichannel Scheduling in IEEE 802.11p MLME: (Abstract Only)

The capacity of IEEE 802.11p communication in vehicular ad hoc networks (VANETs) is widely sensitive to the tradeoff between control channel (CCH) and service channels (SCHs), which is particularly obvious in the different traffic flow condition. This paper proposes a hybrid multichannel scheduling algorithm with FPGA and traffic flow forecasting based on Kalman Filter (HMS-FFK) according to the extended SCH access mechanism mentioned in IEEE 1609.4 protocol. In HMS-FFK, a Random CCH Transmission Request Probability is defined to describe the CCH message congestion probability according to the local traffic flow density. Then, a hardware prototype of MAC sublayer management entities (MLME) based on HMS-FFK scheduling (MLME-HMS) is designed with FPGA, which is flexible to be integrated in the 802.11p communication system by the PCI interface. Theoretical analysis and simulation results show that the proposed scheme and hardware prototype of MLME are able to help IEEE 1609.4 MAC to optimize the throughput of SCHs and reduce the transmission delay of CCH in the different traffic flow condition.