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Content for TR 45.820 Word version: 13.1.0

0… 5… 6… 6.3… 7… 7.3… 7A…

7.3 Narrow Band Cellular IoT (NB-CIoT) 7.3.1 General 7.3.2 Downlink physical layer design 7.3.3 Uplink physical layer design 7.3.4 Link layer aspects 7.3.5 Radio resource management 7.3.6 Concept evaluation 7.3.7 Analysis on the re-use of LTE L2/L3 7.4 Cooperative Ultra Narrow Band (C-UNB) 7.4.1 General Description 7.4.2 Downlink physical layer design 7.4.3 Uplink physical layer design 7.4.4 Link layer aspects 7.4.5 Radio resource management

7.3 Narrow Band Cellular IoT (NB-CIoT) p. 314

7.3.1 General p. 314

7.3.1.1 Design principles p. 314

7.3.1.2 Design targets p. 315

7.3.1.2.1 Coverage extension p. 315

7.3.1.2.2 Battery life p. 316

7.3.1.2.3 MS complexity p. 316

7.3.1.2.4 System bandwidth and deployment options p. 316

7.3.1.2.5 System Capacity p. 317

7.3.2 Downlink physical layer design p. 317

7.3.2.1 Frequency channelization and reuse p. 317

7.3.2.2 Time-domain frame and slot structure p. 318

7.3.2.3 Downlink transport channels p. 319

7.3.2.3.1 Broadcast channel p. 320

7.3.2.3.2 Downlink common control channel p. 320

7.3.2.3.3 Synchronization channel p. 322

7.3.2.3.4 Physical downlink shared channel p. 323

7.3.2.4 Transmit chain for downlink channels p. 324

7.3.2.4.1 Downlink CRC calculation p. 325

7.3.2.4.2 Downlink FEC and interleaving p. 325

7.3.2.4.3 Rate matching p. 326

7.3.2.4.4 Constellation mapping p. 326

7.3.2.4.5 Mapping to Physical Resource Block p. 326

7.3.2.5 Downlink hopping scheme p. 326

7.3.3 Uplink physical layer design p. 327

7.3.3.1 Basic transmission scheme p. 327

7.3.3.1.1 Multiplexing scheme p. 327

7.3.3.1.2 Uplink shared channel p. 328

7.3.3.1.3 Transmission chain p. 329

7.3.3.2 Physical layer procedure p. 334

7.3.3.2.1 Uplink synchronization p. 334

7.3.3.2.2 Uplink power control p. 335

7.3.3.2.3 Uplink frequency hopping p. 335

7.3.4 Link layer aspects p. 336

7.3.4.1 Overview p. 336

7.3.4.2 MS operating modes p. 337

7.3.4.3 Overview of the radio protocol structure p. 338

7.3.4.3.1 Gb-based architecture p. 338

7.3.4.3.2 S1-based architecture p. 340

7.3.4.4 Scheduling p. 342

7.3.4.4.1 PDCCH structure and reading on MS p. 342

7.3.4.5 Random access procedure p. 343

7.3.4.5.1 RACH configuration p. 343

7.3.4.5.2 Random access procedure with random number p. 343

7.3.4.5.3 Random access procedure with C-RNTI p. 344

7.3.4.5.4 Random Access Request p. 345

7.3.4.6 Data transfer procedure p. 345

7.3.4.6.1 General p. 345

7.3.4.6.2 Segmentation and re-assembly p. 347

7.3.4.6.3 Data transmission and retransmission p. 348

7.3.4.7 Paging p. 349

7.3.4.7.1 General description p. 349

7.3.4.7.2 PDCCH Message Indication p. 350

7.3.4.7.3 PDCCH Own Group p. 350

7.3.4.7.4 Realizing time coordinated paging (subject to ongoing SA2 investigation) p. 350

7.3.4.8 MAC PDU format and structure p. 352

7.3.4.8.1 MAC PDU general structure p. 352

7.3.4.8.2 MAC control messages p. 352

7.3.4.9 Examples of message flows p. 354

7.3.4.9.1 General p. 354

7.3.4.9.2 Uplink data followed by downlink data p. 354

7.3.4.9.3 Downlink data followed by uplink data p. 356

7.3.4.9.4 Multiple uplink data packets p. 358

7.3.4.9.5 Uplink data retransmission p. 360

7.3.4.9.6 Downlink data retransmission p. 360

7.3.5 Radio resource management p. 362

7.3.5.1 System Information p. 362

7.3.5.1.1 System Information scheduling p. 362

7.3.5.1.2 System Information contents p. 362

7.3.5.1.3 System Information Reading p. 365

7.3.5.2 Idle more procedures p. 366

7.3.5.2.1 General p. 366

7.3.5.2.2 Considerations for cell selection, reselection, measurement and OOS p. 366

7.3.5.3 Coverage class p. 367

7.3.5.3.1 Definition of coverage class p. 367

7.3.5.3.2 Initial coverage class selection p. 367

7.3.5.3.3 Coverage class notification p. 367

7.3.5.3.4 Coverage class adaptation p. 367

7.3.5.3.5 Load balancing among coverage classes p. 368

7.3.6 Concept evaluation p. 368

7.3.6.1 Coverage evaluation p. 368

7.3.6.1.1 Network synchronization p. 368

7.3.6.1.2 Uplink synchronization p. 373

7.3.6.1.3 Random access request p. 374

7.3.6.1.4 Downlink data and control channels p. 375

7.3.6.1.5 Uplink data and control channels p. 377

7.3.6.2 Capacity evaluation p. 380

7.3.6.2.1 Capacity evaluation for MS generated user data p. 380

7.3.6.3 Latency evaluation p. 384

7.3.6.3.1 Analytical latency evaluation for MAR exception reports p. 384

7.3.6.3.2 Latency evaluation for uplink reports generated by MAR periodic p. 388

7.3.6.3.3 Latency evaluation of downlink application layer ACKs for uplink generated MAR periodic reports p. 389

7.3.6.3.4 Latency evaluation for random access p. 389

7.3.6.4 Energy consumption evaluation p. 390

7.3.6.4.1 Assumptions p. 391

7.3.6.4.2 Results p. 393

7.3.6.4.3 Conclusions p. 393

7.3.6.5 MS complexity evaluation p. 394

7.3.6.5.1 Module architecture assumptions p. 394

7.3.6.5.2 SoC hardware complexity estimate p. 396

7.3.6.5.3 Software complexity estimate p. 397

7.3.6.5.4 Comparison with legacy GPRS p. 399

7.3.6.5.5 Conclusions p. 400

7.3.6.6 Coexistence evaluation p. 400

7.3.6.6.1 Coexistence with GSM, uplink p. 400

7.3.6.6.2 Coexistence with GSM, downlink p. 407

7.3.6.6.3 Coexistence with UTRA, uplink p. 413

7.3.6.6.4 Coexistence with UTRA, downlink p. 415

7.3.6.6.5 Coexistence with E-UTRA, uplink p. 417

7.3.6.6.6 Coexistence with E-UTRA, downlink p. 420

7.3.6.6.7 Coexistence with E-UTRA (using alternative assumptions), uplink p. 422

7.3.6.6.8 Coexistence with E-UTRA (using alternative assumptions), downlink p. 425

7.3.6.7 Software update/reconfiguration p. 428

7.3.6.7.1 Simulation settings p. 428

7.3.6.7.2 Performance metric - resource utilization p. 428

7.3.6.7.3 Simulation results p. 428

7.3.6.7.4 Conclusion p. 429

7.3.6.8 Implementation impacts to the radio units of legacy base stations p. 429

7.3.6.8.1 Downlink PAPR p. 429

7.3.6.9 Implementation impacts to the baseband units of legacy base stations p. 430

7.3.6.9.1 Transmitter side p. 430

7.3.6.9.2 Receiver side p. 430

7.3.6.9.3 Conclusion p. 431

7.3.7 Analysis on the re-use of LTE L2/L3 p. 432

7.3.7.1 General description p. 432

7.3.7.2 MAC layer p. 432

7.3.7.3 RLC layer p. 432

7.3.7.4 PDCP layer p. 433

7.3.7.5 RRC layer p. 433

7.4 Cooperative Ultra Narrow Band (C-UNB) p. 434

7.4.1 General Description p. 434

7.4.1.1 Random uplink transmission p. 434

7.4.1.2 Ad hoc micro-channels p. 434

7.4.1.3 Cooperative reception p. 435

7.4.1.4 System architecture p. 435

7.4.1.5 Beacon channel p. 437

7.4.1.5.1 Beacon channel concept p. 437

7.4.1.5.2 Network discovery p. 437

7.4.1.6 Downlink transmission p. 437

7.4.1.7 Security p. 437

7.4.1.7.1 Radio access level p. 437

7.4.1.7.2 Core network level p. 437

7.4.1.7.3 User data encryption p. 438

7.4.2 Downlink physical layer design p. 438

7.4.2.1 Types of DL channels p. 438

7.4.2.2 Bit rate p. 438

7.4.2.3 Modulation p. 438

7.4.2.4 Transmission power of ad hoc micro-channel in downlink p. 438

7.4.2.5 Center frequency in DL p. 438

7.4.2.6 Pulse shaping and spectrum mask p. 439

7.4.2.7 Error correction code p. 439

7.4.3 Uplink physical layer design p. 439

7.4.3.1 Bit rate p. 439

7.4.3.2 Modulation p. 439

7.4.3.3 Transmission power p. 439

7.4.3.4 Uplink frequency p. 439

7.4.3.5 Pulse shaping and spectrum mask p. 439

7.4.3.6 Error correction code (ECC) p. 440

7.4.4 Link layer aspects p. 440

7.4.4.1 Downlink link layer formats and structures p. 440

7.4.4.1.1 Format of downlink MAC-PDUs p. 440

7.4.4.1.2 Segmentation & reassembly in DL p. 441

7.4.4.1.3 Format of the beacon channel p. 441

7.4.4.2 Uplink link layer formats and structures p. 442

7.4.4.2.1 Format of uplink MAC-PDU p. 442

7.4.4.2.2 Segmentation & reassembly in UL p. 444

7.4.4.3 Link Layer procedures p. 444

7.4.4.3.1 Uplink acknowledgement p. 444

7.4.4.3.2 Downlink acknowledgement p. 445

7.4.5 Radio resource management p. 446

7.4.5.1 Radio design principles p. 446

7.4.5.2 Beacon channel p. 447

7.4.5.2.1 Beacon channel frequency p. 447

7.4.5.2.2 Beacon channel cyclic transmission p. 447

7.4.5.2.3 Duration of a beacon cycle p. 448

7.4.5.3 Poll procedure for transmission of downlink packets p. 448