The Synchronized Peer-to-Peer Framework  and Distributed Contention-Free Medium Access for  Multihop Wireless Sensor Networks

<table class="table-group" width="800px"><tr class="fig-image" id="a"><td><img alt="728415.fig.013a" src="https://static.hindawi.com/articles/js/volume-2008/728415/figures/728415.fig.013a.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(a) </b>Forward allocation</td></tr></table></td></tr><tr class="fig-image" id="b"><td><img alt="728415.fig.013b" src="https://static.hindawi.com/articles/js/volume-2008/728415/figures/728415.fig.013b.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(b) </b>Backward allocation</td></tr></table></td></tr></table>

<table>End-to-end delay. Node 1 is closest to the source and
node 3 is closest to the destination, but is not the destination.</table>

Journal of Sensors

fig13

Figure 13

Figure 13: The Synchronized Peer-to-Peer Framework  and Distributed Contention-Free Medium Access for  Multihop Wireless Sensor Networks 