For reducing energy consumption and ensuring connectivity of wireless sensor networks（ WSNs）

a dynamic probability sleep-scheduling based topology control（ DPSS—TC） algorithm is proposed. DPSS—TC algorithm sets node dormancy probability dynamically according to number of member nodes in cluster after clustering and combines awaking dormant nodes mandatorily with enhancing transmission power of corresponding active node for restoring partial topology structure for damaged connecting area. Simulation results show that DPSS—TC algorithm can not only guarantee nework connectivity

but also prolong network lifetime effectively.