An Optimized Service Differentiated Congestion Management Protocol For Delay Constrained Traffic in Healthcare Wsn'S

This paper proposes a novel congestion management protocol for constrained delay traffic and optimized rate control for hwsns. the proposed protocol consists of congestion avoidance and control phases. we distinguish between high and low priority traffics. for high priority traffic, we control end-to-end delay constrains with node output scheduling weights. for low priority traffics, we first avoid congestion using a new active queue management (aqm) algorithm that uses a distinct virtual queue's situation to decide about accepting or dropping the received packets from child nodes. if acceptance occurs for the incoming packet, congestion is detected by the proposed protocol using a three state machine and a virtual queue status. afterward, the child’s sending rate is adjusted using an optimization function. the results of the simulation indicate goal achievement for the protocol proposed.