Aiming at problem that the existing scheduling algorithms for wireless body area networks（ WBAN） are measured by network lifetime

which does not consider transmission rate of nodes and fairness of network under specific applications

a centralized scheduling algorithm is proposed. The problem is modeled as a Markov decision process with fairness constraints and it is solved by using value iteration to obtain the optimal scheduling strategy.Experimental results show that the reasonable selection of fairness threshold can prolong network lifetime. The algorithm can achieve the optimal value of the network lifetime compared with the traditional ones.