WBSN(wireless body sensor network)is faced with the traffic transmission problem due to the new medical care mode of"Internet+medical".It is very important to solve the congestion control problem of important life signal transmission.Therefore,a congestion control algorithm based on DI-RED is proposed.Through the establishment of a multi-hop data transmission system model,the multi-type users'life information collected by the biosensor is classified by the informa-tion fusion unit,the non-cyclic priority aggregation unit is transmitted in packets,and the DI-RED congestion control unit actively discards the data packets and notifies the sender to reduce the transmission rate to alleviate the congestion problem of the parent node.The arrival state,depar-ture state and holding state of the queue in the parent node cache are constructed into discrete time Markov chain.The effectiveness of the proposed algorithm is verified by numerical simulation ex-periments.
wireless physiological sensor networkcongestion controlpriorityqueuing theory
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