Multi path Multi SPEED Contention Window Adapter

In this paper, we are interested to enhance the QoS in sensor networks. First, we study the MMSPEED routing protocol (Multi path Multi SPEED) [1] conceived to ensure the quality of real-time services in sensor networks. We present, then, a second approach which takes advantage of the standard 802.11e EDCA protocol [16] that ensures effective end to end delay and good quality of traffic. Finally, we tried to improve the provision of quality of service in sensor networks by offering a new approach which aims to improve the mechanism of service differentiation implemented in the 802.11e.