Abstract:

To minimize energy consumption and prolong network lifetime in wireless sensor network (WSN) has become a hot research topic. For this purpose,we design a simple sequential schedule algorithm (SSSA) and an energytime tradeoff schedule algorithm (ETTS) based on the classic divisible load scheduling algorithm in WSN. The SSSA is the minimum energy consumption algorithm among the classic divisible load schedules proved by theory and experiment respectively under the constraint of minimal time.The experimental results show that the two schedule algorithms can reduce the network energy consumption and prolong the network life cycle effectively.And the SSSA should be used when the number of surviving nodes is highly important to the network topology,otherwise the ETTS should be used when the energy of the initial rounds is  especially concerned.Furthermore,the ETTS can reduce the energy consumption further with the increase of the given time.      

Key words: wireless sensor network;divisible load;load schedule;star topology;sequential transmission;minimum energy consumption