Analytical study of IEEE 802.11 MAC protocol based on differentiated services for wireless sensor networks
Le De · Application of Electronic Technique · 2010
Considering that IEEE802.11 wireless sensor networks can not provide any priority scheme,this paper proposes a new scheme based on the 802.11 MAC protocol.The main idea is that,by introducing new types of control frames,receiving nodes may refuse to accept data of low-priority nodes.As a result,the QoS of high-priority data flow is effectively improved.Our mathematical analyses demonstrate that the new mechanism can make the high-priority data flow obtain more bandwidth,and frame dropping probability.Through performance analysis and simulation,the result shows that the energy efficient of high-priority data flow is lower than one of low-priority data flow,especially the energy efficient of the improved MAC protocol is obvious along with the increasing sensor density gradually.