Extended IEEE 802.15.4 using CSMA/CA with Timing Group Division for high performance

Abstract

AbstractWe propose Timing Group Division (TGD) for faster IEEE 802.15.4 throughput. Our proposed method splits terminals into groups. All terminals in each group have both TGD delay and CSMA/CA delay. Terminals avoid packet collision by using two kinds of delay so that the system becomes faster than using only a CSMA/CA system. When terminals were divided into two groups or more, we confirmed faster communication from our actual experimental results. Our proposed method was able to communicate faster than the method using only CSMA/CA according to experimental results using 16 end‐devices, with a speed increase of 40% or more. Furthermore, we propose an autonomous grouping method using RSSI for the autonomous decentralized network. Our proposed method using RSSI was faster than the method using only CSMA/CA according to actual experimental results, with a speed increase of more than 25%. Thus, we have established an autonomous grouping method for TGD based on our proposed method. © 2012 Wiley Periodicals, Inc. Electron Comm Jpn, 95(6): 41–51, 2012; Published online in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/ecj.10429