Tongqing Qiu Jian Ni Hao Wang Nan Hua Yang Richard Yang Jun Jim Xu Packet doppler: network monitoring using packet shift detection. 3 2008 CoNEXT http://doi.acm.org/10.1145/1544012.1544015 conf/conext/2008 db/conf/conext/conext2008.html#QiuNWHYX08