In this paper, we propose an energy-efficient MAC(Medium Access Control) protocol for multiple event handling in ubiquitous sensor network environment. We make scenarios when events occur and when they do not for proposed CASMAC (Context Aware Sensor ...
In this paper, we propose an energy-efficient MAC(Medium Access Control) protocol for multiple event handling in ubiquitous sensor network environment. We make scenarios when events occur and when they do not for proposed CASMAC (Context Aware Sensor MAC). Also the mechanism of CASMAC is dynamically changes data transmission timing rates by scenarios. In addition, CASMAC is based on SMAC(Sensor MAC) and it use ECAM(Event Control Action Model) which is existing system model by event-driven. Through ECAM and scenarios, CASMAC make modules; event, control, action and model. These modules available to shift other contents by the situation. With the information provided beforehand, CASMAC reduces energy being wasted from sending redundant data by employing transmission rate control mechanisms on sample data when the events occur. And we implement a event handler for multiple event environment. By integration data packet and timer, it process event data from various sensors optimally. In a result, CASMAC inovate existing MAC protocol for energy-efficiency in dynamic environments by using context information, ECAM and multiple event handler. Through the simulation using MATLAB, we proved the performance of CASMAC; CASMAC gains about 23% energy reduction compared to SMAC.