Sha Liu Kai-Wei Fan Prasun Sinha CMAC: An Energy Efficient MAC Layer Protocol Using Convergent Packet Forwarding for Wireless Sensor Networks. 11-20 2007 SECON http://dx.doi.org/10.1109/SAHCN.2007.4292813 conf/secon/2007 db/conf/secon/secon2007.html#LiuFS07