Exploiting the periodic beacon transmissions in channel link quality periodicity

In this study we are exploiting the periodic nature of human activities in order to better utilize the channel between the on body sensors and a sink that collects the data coming from those sensors. We propose a health-care monitoring system where nodes having good quality links use the channel and the ones with poor quality links defer their packet transmissions until better link conditions. In such an adaptive way, the allocated bandwidth for the nodes with good quality links is also improved. We use the periodic beacons send by the IEEE 802.15.4 coordinator (sink) for the link quality estimation. Besides, we define a two-level prioritization scheme compatible with IEEE 802.15.4, for different application requirements.