2018/07/15 by Amin Azari, Azari, Amin, Guowang Miao +5
Computer Science · Engineering · #Energy Harvesting in Wireless Networks #FOS: Computer and information sciences #Information Theory (cs.IT) #IoT Networks and Protocols #IoT and Edge/Fog Computing
paper · pdf · doi:10.48550/arxiv.1807.05602
openalex publication_date 2018/07/15 · openalex created_date 2022/08/04 · openalex updated_date 2026/07/28
Narrowband IoT (NB-IoT) is the latest IoT connectivity solution presented by\nthe 3GPP. NB-IoT introduces coverage classes and introduces a significant link\nbudget improvement by allowing repeated transmissions by nodes that experience\nhigh path loss. However, those repetitions necessarily increase the energy\nconsumption and the latency in the whole NB-IoT system. The extent to which the\nwhole system is affected depends on the scheduling of the uplink and downlink\nchannels. We address this question, not treated previously, by developing a\ntractable model of NB-IoT access protocol operation, comprising message\nexchanges in random-access, control, and data channels, both in the uplink and\ndownlink. The model is then used to analyze the impact of channel scheduling as\nwell as the interaction of coexisting coverage classes, through derivation of\nthe expected latency and battery lifetime for each coverage class. These\nresults are subsequently employed in investigation of latency-energy tradeoff\nin NB-IoT channel scheduling as well as determining the optimized operation\npoints. Simulations results show validity of the analysis and confirm that\nthere is a significant impact of channel scheduling on latency and lifetime\nperformance of NBIoT devices.\n