1. IPSN 2010

2. Simple example

3. Theory Background

4. 3 key challenges  Choose an appropriate penalty function  high end-to-end packet delays  Scalability - Large queue sizes

5. 3 key challenges - solution  Choose an appropriate penalty function

6.  React to loading threat

7. 3 key challenges - solution  high end-to-end packet delays Using LIFO LIFO FIFO

8. 3 key challenges - solution  Scalability - Large queue sizes Use Floating Queue Backpressure = sizeof( Virtual Q ) + sizeof( Data Q)

9. Experiment

10. Experiment – static network  Goodput & delivery efficiency BCPCTP 0.25PPS2.392.65 1PPS3.122.99

11. Experiment – static network  Delay performance

12. Experiment – static network  Scalability Maximum data queue size = 11

13. Experiment – static network  Reorder density CTP: 99.9% in-order delivery for 0.25pps & 1.0pps

14. Experiment – external interference  802.11 interference

15. Experiment – external interference  Highly mobile sinks