naa a22 4500 510791557 CHVBK 20180411083321.0 cr unu---uuuuu 180411e20130701xx s 000 0 eng 10.1007/s11277-012-0841-x doi (NATIONALLICENCE)springer-10.1007/s11277-012-0841-x Kim Wook Telecommunication Systems Division, Samsung Electronics, 416, Maetan-3Dong, Yeongton-Gu, 443-742, Suwon-Si, Gyeonggi-Do, Korea aut Short Clear Channel Assessment in Slotted IEEE 802.15.4 Networks [Elektronische Daten] [Wook Kim] One of the major concerns in wireless sensor networks is energy saving due to lack of power sources. IEEE 802.15.4 provides CSMA/CA to reduce the possibility of a collision by checking whether the medium is in use. This checking operation is CCA (Clear Channel Assessment). Currently, IEEE 802.15.4 defines CCA as two consecutive channel assessment for slotted CSMA/CA. Obviously, always performing the channel assessment twice is wasteful and inefficient, since it requires more delay and energy consumption than when the channel assessment is performed once. In this paper, we propose a SCCA (Short Clear Channel Assessment) scheme which performs the channel assessment once, not twice, with minimal effort. Simulation results show that the SCCA operation provides reduced CCA processing time and energy consumption than when IEEE 802.15.4 CCA is used. Springer Science+Business Media, LLC., 2012 CSMA/CA nationallicence CCA nationallicence Frame acknowledgement nationallicence Beacon-enabled mode nationallicence Energy efficiency nationallicence 802.15.4 nationallicence LR-WPAN nationallicence Wireless Personal Communications Springer US; http://www.springer-ny.com 71/1(2013-07-01), 735-744 0929-6212 71:1<735 2013 71 11277 https://doi.org/10.1007/s11277-012-0841-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-012-0841-x text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Kim Wook Telecommunication Systems Division, Samsung Electronics, 416, Maetan-3Dong, Yeongton-Gu, 443-742, Suwon-Si, Gyeonggi-Do, Korea aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 71/1(2013-07-01), 735-744 0929-6212 71:1<735 2013 71 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer