IEEE 802.11ax (Wi-Fi 6) D3.0标准草案解析

需积分: 5 72 浏览量更新于2024-07-09 收藏 6.28MB PDF 举报

"IEEE P802.11ax_D3.0.pdf 是 IEEE 802.11ax 的一个标准草案，它旨在提高无线局域网（WLAN）的效率，被称为高效率无线（HEW）。这个标准由IEEE标准协会的TGax工作组于2014年5月启动，并在2018年发布了D3.0版本。它是对IEEE 802.11-2016标准的第六次修订，同时考虑了802.11ai、802.11ah、802.11aj、802.11ak和802.11aq等先前标准的更新。" IEEE 802.11ax，也称为Wi-Fi 6，是Wi-Fi技术的最新迭代，它的目标是提升网络容量、性能和效率，尤其是在高密度用户环境中。该标准引入了多项创新技术，包括： 1. **OFDMA（正交频分多址）**：与之前的OFDM（正交频分复用）相比，OFDMA允许多个设备在同一个时间片内共享信道，提高了频谱效率和网络容量。 2. **更高阶调制**：802.11ax采用了1024-QAM（四相幅移键控），相比于802.11ac的256-QAM，能够在一个符号中传输更多的数据比特，从而增加了数据传输速率。 3. **MU-MIMO（多用户多输入多输出）**：不仅支持下行链路的MU-MIMO，还首次实现了上行链路的MU-MIMO，使得路由器可以同时与多个设备通信，进一步提升了网络效率。 4. **Target Wake Time (TWT)**：这是一种节能机制，允许设备与接入点协商唤醒时间，减少了不必要的电池消耗，特别适合物联网(IoT)设备。 5. **频道绑定和空间复用**：802.11ax可以使用更宽的频道（如160MHz），并支持更高级别的空间流，增加数据吞吐量。 6. **基本服务集(BSS)色码**：通过为每个BSS分配独特的颜色，改善了多BSS环境中的干扰管理，提高了网络性能。 7. **高效物理层(HEPHY)**：HEPHY包含了各种新的物理层特性，旨在提高频谱效率和数据传输速度。 8. **上下行链路功率控制**：优化了信号覆盖范围，同时减少了对其他设备的干扰。 IEEE 802.11ax标准通过采用这些先进技术，旨在提供比802.11ac更高的网络容量、更稳定的连接和更低的延迟，尤其适用于高用户密度的场合，如机场、体育馆和大型办公区域。尽管本文档是未经批准的IEEE标准草案，但其内容反映了802.11ax技术的核心改进和发展方向。随着标准的最终确定和实施，Wi-Fi 6将为用户提供更快、更可靠、更节能的无线网络体验。

IEEE P802.11ax/D3.0, June 2018

This is an unapproved IEEE Standards Draft, subject to change.

27.9.3.5 SR PPDU transmission requirements ................................................. 347

27.9.3.6 SR PPDU reception and response transmission requirements............ 347

27.9.4 Interaction of OBSS PD and SRP-based spatial reuse .......................................... 347

27.10 A-MPDU operation................................................................................................................ 347

27.10.1 General................................................................................................................... 347

27.10.2 A-MPDU padding for an HE SU PPDU, HE ER SU PPDU and HE MU PPDU . 348

27.10.3 A-MPDU padding for an HE TB PPDU................................................................ 348

27.10.4 Multi-TID A-MPDU and ack-enabled A-MPDU .................................................. 349

27.10.4.1 General................................................................................................ 349

27.10.4.2 Non-ack-enabled multi-TID A-MPDU operation............................... 351

27.10.4.3 Ack-enabled multi-TID A-MPDU operation...................................... 351

27.11 Setting TXVECTOR parameters for an HE PPDU ............................................................... 352

27.11.1 STA_ID_LIST ....................................................................................................... 352

27.11.2 UPLINK_FLAG .................................................................................................... 353

27.11.3 BEAM_CHANGE ................................................................................................. 353

27.11.4 BSS_COLOR......................................................................................................... 353

27.11.5 TXOP_DURATION .............................................................................................. 355

27.11.6 SPATIAL_REUSE ................................................................................................ 356

27.12 HE PPDU post FEC padding and packet extension .............................................................. 358

27.13 Link adaptation using the HLA Control subfield .................................................................. 359

27.14 Power management................................................................................................................ 361

27.14.1 Intra-PPDU power save for non-AP HE STAs...................................................... 361

27.14.2 Power save with UORA......................................................................................... 362

27.14.3 Opportunistic power save ...................................................................................... 363

27.14.3.1 General................................................................................................ 363

27.14.3.2 AP operation for opportunistic power save......................................... 363

27.14.3.3 STA operation for opportunistic power save ...................................... 364

27.15 PPDU format, BW, MCS, NSS, and DCM selection rules ................................................... 364

27.15.1 General................................................................................................................... 364

27.15.2 PPDU format selection .......................................................................................... 364

27.15.3 MCS, NSS, BW and DCM selection ..................................................................... 366

27.15.4 Rate selection constraints for HE STAs ................................................................ 367

27.15.4.1 Rx Supported HE-MCS and NSS Set ................................................. 367

27.15.4.2 Tx Supported HE-MCS and NSS Set ................................................. 368

27.15.4.3 Additional rate selection constraints for HE PPDUs .......................... 368

27.15.4.4 Rx Supported VHT-MCS and NSS Set .............................................. 369

27.16 HE BSS operation.................................................................................................................. 369

27.16.1 Basic HE BSS functionality................................................................................... 369

27.16.2 BSS color ...............................................................................................................372

27.16.2.1 Selecting and advertising a new BSS color ........................................ 372

27.16.2.2 Detecting and reporting BSS color collision....................................... 373

27.16.3 AID assignment ..................................................................................................... 374

27.16.4 Quiet HE STAs in an HE BSS............................................................................... 374

27.16.4.1 General................................................................................................ 374

27.16.4.2 Procedure at the requester HE STA .................................................... 375

27.16.4.3 Procedure at the responder AP............................................................ 375

27.16.5 ER beacon generation in an ER BSS ..................................................................... 376

27.16.6 Co-located BSSID set ............................................................................................ 376

28. High Efficiency (HE) PHY specification .......................................................................................... 377

28.1 Introduction............................................................................................................................ 377

28.1.1 Introduction to the HE PHY .................................................................................. 377

28.1.2 Scope...................................................................................................................... 382

IEEE P802.11ax/D3.0, June 2018

This is an unapproved IEEE Standards Draft, subject to change.

28.1.3 HE PHY functions ................................................................................................. 382

28.1.3.1 General................................................................................................ 382

28.1.3.2 PHY management entity (PLME)....................................................... 382

28.1.3.3 Service specification method .............................................................. 382

28.1.4 PPDU formats ........................................................................................................ 382

28.2 HE PHY service interface...................................................................................................... 383

28.2.1 Introduction............................................................................................................ 383

28.2.2 TXVECTOR and RXVECTOR parameters .......................................................... 383

28.2.3 TRIGVECTOR parameters.................................................................................... 401

28.2.4 PHYCONFIG_VECTOR parameters .................................................................... 402

28.2.5 Effects of CH_BANDWIDTH parameter on PPDU format.................................. 403

28.2.6 Support for NON-HT, HT and VHT formats ........................................................ 404

28.2.6.1 General................................................................................................ 404

28.2.6.2 Support for NON_HT format.............................................................. 406

28.2.6.3 Support for HT format ........................................................................ 407

28.2.6.4 Support for VHT format ..................................................................... 408

28.3 HE PHY ................................................................................................................................. 409

28.3.1 Introduction............................................................................................................ 409

28.3.1.1 MU transmission................................................................................. 409

28.3.1.2 OFDMA .............................................................................................. 409

28.3.2 Subcarrier and resource allocation......................................................................... 410

28.3.2.1 General................................................................................................ 410

28.3.2.2 Resource unit, guard and DC subcarriers............................................ 410

28.3.2.3 Null subcarriers ................................................................................... 417

28.3.2.4 Pilot subcarriers................................................................................... 418

28.3.2.5 Resource indication and User identification in an HE MU PPDU ..... 419

28.3.2.6 Resource allocation for an HE TB PPDU........................................... 420

28.3.2.7 20 MHz operating non-AP HE STAs ................................................. 420

28.3.2.8 RU restrictions for 20 MHz operation ................................................ 421

28.3.2.9 80 MHz operating non-AP HE STAs ................................................. 422

28.3.3 MU-MIMO ............................................................................................................ 423

28.3.3.1 DL MU-MIMO ................................................................................... 423

28.3.3.2 UL MU-MIMO ................................................................................... 423

28.3.4 HE PPDU formats.................................................................................................. 424

28.3.5 Transmitter block diagram..................................................................................... 427

28.3.6 Overview of the PPDU encoding process.............................................................. 435

28.3.6.1 General................................................................................................ 435

28.3.6.2 Construction of L-STF........................................................................ 435

28.3.6.3 Construction of L-LTF........................................................................ 436

28.3.6.4 Construction of L-SIG ........................................................................ 436

28.3.6.5 Construction of RL-SIG...................................................................... 437

28.3.6.6 Construction of HE-SIG-A ...............................

.................................. 438

28.3.6.7 Construction of HE-SIG-B.................................................................. 439

28.3.6.8 Construction of HE-STF ..................................................................... 439

28.3.6.9 Construction of HE-LTF..................................................................... 440

28.3.6.10 Construction of the Data field in an HE SU PPDU, HE ER SU PPDU, and

HE TB PPDU 440

28.3.6.11 Construction of the Data field in an HE MU PPDU ........................... 442

28.3.7 HE modulation and coding schemes (HE-MCSs) ................................................. 442

28.3.8 Timing-related parameters..................................................................................... 443

28.3.9 Mathematical description of signals ...................................................................... 448

28.3.10 HE preamble .......................................................................................................... 454

28.3.10.1 Introduction......................................................................................... 454

28.3.10.2 Cyclic shift .......................................................................................... 454

IEEE P802.11ax/D3.0, June 2018

This is an unapproved IEEE Standards Draft, subject to change.

28.3.10.3 L-STF.................................................................................................. 454

28.3.10.4 L-LTF.................................................................................................. 456

28.3.10.5 L-SIG .................................................................................................. 457

28.3.10.6 RL-SIG................................................................................................ 459

28.3.10.7 HE-SIG-A ........................................................................................... 459

28.3.10.8 HE-SIG-B............................................................................................ 477

28.3.10.9 HE-STF ............................................................................................... 492

28.3.10.10 HE-LTF............................................................................................... 496

28.3.11 Data field................................................................................................................ 513

28.3.11.1 General................................................................................................ 513

28.3.11.2 Pre-FEC padding process.................................................................... 513

28.3.11.3 SERVICE field.................................................................................... 516

28.3.11.4 Scrambler ............................................................................................ 516

28.3.11.5 Coding................................................................................................. 516

28.3.11.6 Stream parser....................................................................................... 521

28.3.11.7 Segment parser.................................................................................... 522

28.3.11.8 BCC interleavers ................................................................................. 522

28.3.11.9 Constellation mapping ........................................................................ 523

28.3.11.10 Space-time block coding..................................................................... 526

28.3.11.11 LDPC tone mapper.............................................................................. 527

28.3.11.12 Segment deparser ................................................................................ 529

28.3.11.13 Pilot subcarriers................................................................................... 530

28.3.11.14 OFDM modulation.............................................................................. 535

28.3.11.15 Dual carrier modulation ...................................................................... 536

28.3.11.16 Midambles........................................................................................... 536

28.3.12 Packet extension .................................................................................................... 538

28.3.13 Non-HT duplicate transmission ............................................................................. 543

28.3.14 Transmit requirements for an HE TB PPDU ......................................................... 543

28.3.14.1 Introduction......................................................................................... 543

28.3.14.2 Power pre-correction........................................................................... 543

28.3.14.3 Pre-correction accuracy requirements................................................. 544

28.3.15 SU-MIMO and DL MU-MIMO beamforming...................................................... 545

28.3.15.1 General................................................................................................ 545

28.3.15.2 Beamforming feedback matrix V........................................................ 546

28.3.15.3 CQI-only feedback.............................................................................. 547

28.3.16 HE sounding NDP PPDU ...................................................................................... 547

28.3.17 HE TB NDP feedback PPDU ................................................................................ 548

28.3.18 Transmit specification............................................................................................ 548

28.3.18.1 Transmit spectral mask ....................................................................... 548

28.3.18.2 Spectral flatness .................................................................................. 553

28.3.18.3 Transmit center frequency and symbol clock frequency tolerance..... 555

28.3.18.4 Modulation accuracy........................................................................... 555

28.3.18.5 Time of Departure accuracy............................

.................................... 559

28.3.19 Receiver specification............................................................................................ 560

28.3.19.1 General................................................................................................ 560

28.3.19.2 Receiver minimum input sensitivity ................................................... 560

28.3.19.3 Adjacent channel rejection.................................................................. 561

28.3.19.4 Nonadjacent channel rejection ............................................................ 562

28.3.19.5 Receiver maximum input level ........................................................... 563

28.3.19.6 CCA sensitivity ................................................................................... 563

28.3.20 HE transmit procedure ........................................................................................... 567

28.3.21 HE receive procedure............................................................................................. 572

28.3.22 Channel numbering................................................................................................ 579

28.3.22.1 General................................................................................................ 579

IEEE P802.11ax/D3.0, June 2018

This is an unapproved IEEE Standards Draft, subject to change.

28.3.22.2 Channel allocation in the 6 GHz band ................................................ 579

28.3.23 Regulatory requirements........................................................................................ 579

28.4 HE PLME .............................................................................................................................. 579

28.4.1 PLME_SAP sublayer management primitives ...................................................... 579

28.4.2 PHY MIB ............................................................................................................... 579

28.4.3 TXTIME and PSDU_LENGTH calculation.......................................................... 585

28.4.4 HE PHY ................................................................................................................. 588

28.5 Parameters for HE-MCSs ...................................................................................................... 589

28.5.1 HE-MCSs for 26-tone RU ..................................................................................... 589

28.5.2 HE-MCSs for 52-tone RU ..................................................................................... 594

28.5.3 HE-MCSs for 106-tone RU ................................................................................... 599

28.5.4 HE-MCSs for 242-tone RU and non-OFDMA 20 MHz........................................ 604

28.5.5 HE-MCSs for 484-tone RU and non-OFDMA 40 MHz........................................ 609

28.5.6 HE-MCSs for 996-tone RU and non-OFDMA 80 MHz........................................ 614

28.5.7 HE-MCSs for non-OFDMA 160 MHz and 80+80 MHz....................................... 619

Annex B ...................................................................................................................................................... 625

B.4 PICS proforma—IEEE Std 802.11-<year> ..................................................................... 625

B.4.3 IUT configuration............................................................................................... 625

B.4.4 MAC protocol .................................................................................................... 626

B.4.4.1 MAC protocol capabilities .................................................................. 626

B.4.4.2 MAC frames........................................................................................ 627

B.4.10 QoS base functionality ....................................................................................... 628

B.4.27 High efficiency (HE) features ............................................................................ 628

B.4.27.1 HE MAC features................................................................................ 628

B.4.27.2 HE PHY features................................................................................. 631

Annex C ...................................................................................................................................................... 639

C.3 MIB Detail ....................................................................................................................... 639

Annex E ...................................................................................................................................................... 675

E.1 Country information and operating classes ..................................................................... 675

Annex G ...................................................................................................................................................... 677

G.5 HE sequences................................................................................................................... 677

Annex AA ................................................................................................................................................... 679

剩余681页未读，继续阅读

myhearty

粉丝: 1
资源: 23

IEEE 802.11ax (Wi-Fi 6) D3.0标准草案解析

IEEE 802.11ax wifi6标准-Draft P802.11ax_D3.0-682页.pdf

IEEE 802.11ax 草案及资料

Draft P802.11ax_D3.0

IEEE Draft P802.11ax_D3.0.pdf

Draft P802.11ax_D3.0.pdf

Draft P802.11ax_D6.0

IEEE P802.11ax

2019-A Tutorial on IEEE 802.11ax High Efficiency WLANs.pdf

P80211ax_D30_Jun2018.pdf

802.11 standards.zip

最新资源