Abstract: A QoS routing protocol for wireless sensor networks based on strip of area was proposed .According to analsis of the network transmission path energy consumption model, the forward routing nodes were controlled in strip of area of the straight line between source node and sink node, effectively reducing the transmission energy consumption on path .In addition, in the improved QoS protocol, the forward nodes dynamicly established the width of strip of area according to the current QoS constraints, so that the routing path most fits the straight line between source node and sink node to achieve the purpose of optimising the path transmission energy consumption .Simulation experiments show that the QoS protocol for wireless sensor networks, at meetting the networks QoS constraints, saves network energy consumption and prolongs survival time of the network.

Key words: Strip of area routing, Wireless senor networks, QoS, Network energy consumption