Hejun Wu Qiong Luo Pei Zheng Lionel M. Ni VMNet: Realistic Emulation of Wireless Sensor Networks. 277-288 2007 18 IEEE Trans. Parallel Distrib. Syst. 2 http://doi.ieeecomputersociety.org/10.1109/TPDS.2007.33 db/journals/tpds/tpds18.html#WuLZN07