A wireless sensor network medium access control protocol design based on active node and dynamic time slot allocation

Conventional TDMA based MAC protocols are not well suited to the event driven WSN applications. In the literature, there are some MAC protocols specially designed for these applications but they allocate time slots to only source nodes and do not take into consideration data redundancy resulting from the same data retransmitted from the same region. By the opinion that getting the similar data from the same region simultaneously does not provide additional contribution for evaluation of the event/situation, the fundamental motivation of this thesis work is to reduce data redundancy, energy consumption and latency by assigning a time slot to only one of the source nodes all with the same data sensed and to be sent.In this PhD thesis, a MAC protocol (M-BMA) for event driven WSN applications is proposed. A new generic content based scheduling approach, named as active node determination method (ANDM), has been developed and deployed in the MAC design stages. By means of comparative performance analyses with its counterpart protocols, it has been concluded that the M-BMA protocol provides improvement in energy saving and latency reduction.