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http://dx.doi.org/10.7840/kics.2016.41.9.1001

Performance Evaluation of Semi-Persistent Scheduling in a Narrowband LTE System for Internet of Things  

Kim, Sunkyung (Department of Electronic Engineering, Sogang University)
Cha, Wonjung (LG Uplus)
So, Jaewoo (Department of Electronic Engineering, Sogang University)
Na, Minsoo (5G Tech. Lab, Corporate R&D Center, SK Telecom)
Choi, Changsoon (5G Tech. Lab, Corporate R&D Center, SK Telecom)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.41, no.9, 2016 , pp. 1001-1009 More about this Journal
Abstract
In LTE networks, the base station transmits control information over the physical downlink control channel (PDCCH) including scheduling grants, which are used to indicate the resources that the user equipment uses to send data to the base station. Because the size of the PDCCH message and the number of the PDCCH transmissions increase in proportion to the number of user equipments, the overhead of the PDCCH may cause serious network congestion problems in the narrowband LTE (NB-LTE) system. This paper proposes the compact PDCCH information bit allocation to reduce the size of the PDCCH message and evaluates the performance of the semi-persistent scheduling (SPS) in the NB-LTE system. The simulation results show that the SPS can significantly reduce the signaling overhead of the PDCCH and therefore increase the system utilization.
Keywords
NB-LTE; PDCCH; Semi-Persistent Scheduling; Cellular IoT;
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Times Cited By KSCI : 3  (Citation Analysis)
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