Performance Analysis of IEEE 802.15.4 868MHz, 915MHz and 2.4GHz Physical Schemes in 6LoWPAN
نویسندگان
چکیده
In the IEEE 802.15.4 CSMA/CA MAC layer protocol, there are different tradeoff points between the number of nodes competing for the medium and the network capacity. In this paper, we investigate the data transmission performance corresponding to the number of competing nodes in IEEE 802.15.4-based MAC and PHY layers using 6LoWPAN protocol stack. Analysis of the transmission performance by each type of PHY schemes over different working frequency shows that the parameters in these layers play a critical role in determining the overall performance in 6LoWPAN. The goal of this research is to compare the transmission efficiency using exact formulae in un-saturated IEEE 802.15.4 Based sensor networks under varying numbers of competing nodes. Analysis results show that the O-QPSK modulation scheme in 2.4GHz PHY scheme has higher transmission probability and more efficient throughput in 6LoWPAN. Keywords— 6LoWPAN, IEEE 802.15.4, CSMA/CA
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