An efficient bandwidth allocation scheme for real-time control systems built upon the dual wireless LANs

Abstract

This paper proposes and analyzes the structure of dual wireless LAN architecture for the real-time communication along with its bandwidth allocation scheme. The bandwidth allocation scheme searches the feasible network parameters, including the repetition period and capacity vector, which satisfy ail of utilization, deadline, and protocol constraints. The constraints are calculated from the careful analysis of traffic characteristics of the given message stream set. On the dual network, by making the repetition interval of one network precede that of the other by half, we can reduce the worst case medium access time by half. Simulation results executed via SMPL show that reduced overhead enables the wireless LAN to schedule more stream sets than the network whose bandwidth is just doubled.