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Title	A Simple And Efficient Link Adaptation Method For Narrowband Internet Of Things
ID_Doc	4615
Authors	Hu Q.-S.; Fan X.-N.; Li Z.-Y.
Year	2019
Published	Proceedings - 21st IEEE International Conference on High Performance Computing and Communications, 17th IEEE International Conference on Smart City and 5th IEEE International Conference on Data Science and Systems, HPCC/SmartCity/DSS 2019
DOI	http://dx.doi.org/10.1109/HPCC/SmartCity/DSS.2019.00365
Abstract	This paper proposes a simple and efficient link adaptation method for Narrowband Internet of Things (NB-IOT). The proposed method will perform link adaptation from two dimensions. First, the combination of the modulation and coding scheme (MCS) level and the resource unit (RU) number can select a larger transport block according to the packet size compared with the straightforward method. That will reduce the number of narrowband physical uplink shared channel (NPUSCH) and narrowband physical downlink control channel (NPDCCH) transmissions. Besides, the selected repetitions number will satisfy the requirements of the block error rate (BLER) according to the channel status. The results show that the power consumption could be decreased about 27% and spectral efficiency could be improved about 69% compared with the straightforward method. © 2019 IEEE.
Author Keywords	link adaptation; MCS; NB-IOT; repetition

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