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On the Performance of PDCCH in LTE and 5G New Radio
Hongzhi Chen, De Mi, Manuel Fuentes, Eduardo Garro, José Luis Cárcel, Belkacem Mouhouche, Pei Xiao, Rahim Tafazolli
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Abstract
5G New Radio (NR) Release 15 has been specified \nin June 2018. It introduces numerous changes and \npotential improvements for physical layer data transmissions, \nalthough only point-to-point (PTP) communications are considered. \nIn order to use physical data channels such as the \nPhysical Downlink Shared Channel (PDSCH), it is essential \nto guarantee a successful transmission of control information \nvia the Physical Downlink Control Channel (PDCCH). \nTaking into account these two aspects, in this paper, we \nfirst analyze the PDCCH processing chain in NR PTP as \nwell as in the state-of-the-art Long Term Evolution (LTE) \npoint-to-multipoint (PTM) solution, i.e., evolved Multimedia \nBroadcast Multicast Service (eMBMS). Then, via link level \nsimulations, we compare the performance of the two technologies, \nobserving the Bit/Block Error Rate (BER/BLER) for \nvarious scenarios. The objective is to identify the performance \ngap brought by physical layer changes in NR PDCCH as \nwell as provide insightful guidelines on the control channel \nconfiguration towards NR PTM scenarios.
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