목록 METHOD FOR CONTRALLING SLEEP PERIOD OF SENSOR NODE IN SENSOR NETWORK BASED ON IEEE 802.15.4 Inventor Choong Seon Hong, Jin Ho Kim, Jae Yong Park, Jun Lee, Jin Hyuk Kim, Hyung Kyu Kang No. PCT/KR2010/5210 출원국가 미국 상태 출원 Year 2010 Date 2010.Aug. .09 -