8, 202, Reference signal received power application programming 511-512, 765 (RSRP (dBm)), 905 interface, 26-27 Random access-RNTI (RA-RNTI), Reference signal received quality Request to send frame (RTS 764-765 (RSRQ (dB)), 905 frame), 864-865 Random-access Reference signals (RSs), 411-432 Resource preamble sequence, 625 CSI-RS, 425-431 allocation, 396-403, 586 procedure, 43-44, 276, DM-RS, 417-423 in frequency domain, 395-396, 769-770, downlink RSs and 400-403 777-780 corresponding overhead, for grant-free/semi-persistent Random-access preamble ID scheduling, 403-407 (RAPID), 205, 208-209 PT-RS, 423-425 in time domain, 397-400 Random-access response (RAR), TRS, 431-432 type 0, 400-401 205, 763-764 in uplink physical layer isolation, 42-43 Rank indication (RI), 498, 502, DM-RSs, 592-597 layer, 38-39 phase-tracking reference Resource block group (RBG), Rate matching, 490-491 signals, 597-600 400-402 Reactive near-field region, SRS, 601-605 Resource blocks (RBs), 752-753, 666-667 Reference-point representation of Real-time architecture, 146 Resource element (RE), 421, 441 cloud infrastructure, 30 Reflective mapping, 176 Resource indication value (RIV), control data message type, Reflective QoS, 184 78-80 flow to DRB mapping, 235 Resource spread multiple access multi-user gaming, 22 Reflective QoS attribute (RQA), (RSMA), 355 Received signal power, 287-288 175-176, 182 Resource unit (RU), 763-764 Index Retransmissions, 544 counter, 187 zero power CSI-RS resource retransmission-timer, 171 in multi-RAT dual connectivity set activation/deactivation, Rician fading, 289-290 scheme, 153-154 Ring network topologies, 83-84 split bearer, 156 Semi-persistent scheduling (SPS), Road-side unit (RSU), 60-62, Secondary gNB (SgNB), 128, 211, 405, 465, 475-477, 790-791 153-154 809-810, 820 implementation options, 807 UE XnAP ID, 132 SL-SPS-V-RNTI, 826 Roaming/non-roaming network Secondary node (SN), 154, 277 Semi-static/dynamic codebook architecture for LTE-based Secondary synchronization signal HARQ-ACK multiplexing, V2X communicat