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首页2020版IEEE 802.11无线局域网标准发布
2020版IEEE 802.11无线局域网标准发布
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IEEE 802.11-2020 是 IEEE 对于信息技术领域内局域网(Local and Metropolitan Area Networks, LANs)中无线局域网(Wireless Local Area Network, WLAN)部分的最新标准,它关注的是无线局域网的介质访问控制(Medium Access Control, MAC)层和物理层(Physical Layer, PHY)规范。该标准由 IEEE 计算机协会的 LAN/MAN 标准委员会负责制定,并于 2020 年 12 月 3 日获得批准,是 IEEE 802.11-2016 标准的修订版。
在 802.11-2020 标准中,MAC 层规定了无线设备如何在共享无线介质上进行数据传输,包括接入点(Access Points, APs)和移动设备之间的通信协议。这涉及到网络的连接管理、数据帧的发送与接收、冲突避免和多址接入技术,例如分布式协调功能(Distributed Coordination Function,DCF)和点对点模式(Point-to-Point Protocol, PTP)等。MAC 层设计旨在确保网络的高效、可靠和安全运行。
PHY 层则是关注无线信号的传输和接收,包括信号的编码、调制、频率选择、功率控制以及信号的物理层编码标准(如 OFDM, Orthogonal Frequency Division Multiplexing)。这些技术对于无线信号的质量、传输距离和带宽效率至关重要。PHY 层规范有助于确保不同设备间的兼容性和互操作性,同时也可能涉及新的频谱使用策略和技术,以适应不断变化的无线环境。
802.11-2020 标准的发布,旨在应对物联网(Internet of Things, IoT)、5G 技术和无线个人区域网络(Wireless Personal Area Networks, WPANs)的发展需求,提供更高性能、更低延迟和更大容量的无线连接。它可能包括对 Wi-Fi 6(802.11ax)的进一步优化,以及对新兴技术如毫米波(mmWave)和多工频段支持的标准化。
值得注意的是,这份标准文件仅限 Changsha University of Science and Technology 使用,且下载日期为 2021 年 4 月 25 日,可能涉及版权和使用限制。欲了解完整标准内容,应通过官方渠道或购买授权获取。
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Copyright © 2021 IEEE. All rights reserved.
4.3.24.4 Mirrored stream classification service (MSCS).................................. 250
4.3.24.5 Overlapping BSS (OBSS) management ............................................. 250
4.3.24.6 Interworking with IEEE 802.1Q Stream Reservation Protocol (SRP) 250
4.3.24.7 Intra-access category prioritization..................................................... 250
4.3.25 Operation under geolocation database (GDB) control .......................................... 251
4.3.26 CDMG STA........................................................................................................... 252
4.3.27 CMMG STA .......................................................................................................... 253
4.3.28 General link (GLK)................................................................................................ 254
4.3.28.1 General ................................................................................................ 254
4.3.28.2 Selective reception of group addressed frames................................... 254
4.3.28.3 GLK Service Sets................................................................................ 255
4.3.29 Ethertype protocol discrimination (EPD) .............................................................. 259
4.4 Logical service interfaces ...................................................................................................... 260
4.4.1 General................................................................................................................... 260
4.4.2 SS ........................................................................................................................... 260
4.4.3 PBSS control point service (PCPS) ....................................................................... 261
4.4.4 DSS ........................................................................................................................ 261
4.5 Overview of the services........................................................................................................ 262
4.5.1 General................................................................................................................... 262
4.5.2 Distribution of MSDUs within a DS...................................................................... 263
4.5.2.1 Distribution ......................................................................................... 263
4.5.2.2 Integration ........................................................................................... 264
4.5.2.3 QoS traffic scheduling ........................................................................ 264
4.5.3 Connectivity-related services................................................................................. 264
4.5.3.1 General ................................................................................................ 264
4.5.3.2 Mobility types ..................................................................................... 265
4.5.3.3 Association.......................................................................................... 265
4.5.3.4 Reassociation ...................................................................................... 266
4.5.3.5 Disassociation ..................................................................................... 266
4.5.4 Access control and data confidentiality services ................................................... 267
4.5.4.1 General ................................................................................................ 267
4.5.4.2 Authentication..................................................................................... 267
4.5.4.3 Deauthentication ................................................................................. 268
4.5.4.4 Data confidentiality............................................................................. 269
4.5.4.5 Key management................................................................................. 270
4.5.4.6 Data origin authenticity....................................................................... 270
4.5.4.7 Replay detection.................................................................................. 270
4.5.4.8 Fast BSS transition.............................................................................. 270
4.5.4.9 Management frame protection ............................................................ 270
4.5.4.10 MAC privacy enhancements............................................................... 271
4.5.5 Spectrum management services............................................................................. 271
4.5.5.1 General ................................................................................................ 271
4.5.5.2 TPC ..................................................................................................... 271
4.5.5.3 DFS ..................................................................................................... 271
4.5.6 Traffic differentiation and QoS support................................................................. 272
4.5.6.1 General ................................................................................................ 272
4.5.6.2 Quality-of-service management frame support................................... 272
4.5.7 Support for higher layer timer synchronization ..................................................... 272
4.5.8 Radio measurement service ................................................................................... 273
4.5.9 Interworking with external networks ..................................................................... 273
4.5.9.1 General ................................................................................................ 273
4.5.9.2 Preassociation discovery (PAD) ......................................................... 274
4.5.10 Generic advertisement service (GAS) ................................................................... 275
4.6 Multiple logical address spaces ............................................................................................. 276
Authorized licensed use limited to: CHANGSHA UNIV OF SCIENCE AND TECHNOLOGY. Downloaded on April 25,2021 at 11:33:31 UTC from IEEE Xplore. Restrictions apply.
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Copyright © 2021 IEEE. All rights reserved.
4.7 Differences among ESS, PBSS, and IBSS LANs.................................................................. 276
4.8 Differences between ESS and MBSS LANs ......................................................................... 278
4.9 Reference model .................................................................................................................... 279
4.9.1 General................................................................................................................... 279
4.9.2 Interworking reference model................................................................................ 279
4.9.3 Reference model for supporting multiple MAC sublayers .................................... 281
4.9.4 Reference model for multi-band operation ............................................................ 282
4.10 IEEE Std 802.11 and IEEE Std 802.1X-2010 ....................................................................... 284
4.10.1 General................................................................................................................... 284
4.10.2 IEEE 802.11 usage of IEEE Std 802.1X-2010 ...................................................... 284
4.10.3 Infrastructure functional model overview.............................................................. 284
4.10.3.1 General ................................................................................................ 284
4.10.3.2 AKM operations with AS ................................................................... 284
4.10.3.3 AKM operations with a password or PSK.......................................... 287
4.10.3.4 Alternate operations with PSK............................................................ 288
4.10.3.5 Disassociation ..................................................................................... 288
4.10.3.6 AKM operations using FILS authentication ....................................... 288
4.10.4 IBSS functional model description ........................................................................ 289
4.10.4.1 General ................................................................................................ 289
4.10.4.2 Key usage............................................................................................ 289
4.10.4.3 Sample IBSS 4-way handshakes......................................................... 290
4.10.4.4 IBSS IEEE 802.1X example ............................................................... 291
4.10.5 PBSS functional model description ....................................................................... 292
4.10.6 Authenticator-to-AS protocol ................................................................................ 293
4.10.7 PMKSA caching .................................................................................................... 293
4.10.8 Protection of group addressed robust Management frames................................... 294
5. MAC service definition ................................................................................................................... 295
5.1 Overview of MAC services ................................................................................................... 295
5.1.1 Data service............................................................................................................ 295
5.1.1.1 General ................................................................................................ 295
5.1.1.2 Determination of UP ........................................................................... 295
5.1.1.3 Interpretation of priority parameter in MAC service primitives......... 295
5.1.1.4 Interpretation of service class parameter in MAC service
primitives in a STA ............................................................................. 296
5.1.2 Security services .................................................................................................... 297
5.1.3 MSDU ordering ..................................................................................................... 297
5.1.4 MSDU format ........................................................................................................ 298
5.1.5 MAC data service architecture .............................................................................. 299
5.1.5.1 General ................................................................................................ 299
5.1.5.2 Non-GLK non-AP STA role ............................................................... 302
5.1.5.3 Non-GLK AP role............................................................................... 302
5.1.5.4 Non-GLK mesh STA role ................................................................... 303
5.1.5.5 Mesh gate role..................................................................................... 303
5.1.5.6 S1G relay............................................................................................. 303
5.1.5.7 GLK STA role..................................................................................... 305
5.1.5.8 GLK AP role ....................................................................................... 305
5.1.5.9 GLK mesh STA role ........................................................................... 305
5.2 MAC data service specification............................................................................................. 307
5.2.1 General................................................................................................................... 307
5.2.2 GLK MAC data service specification.................................................................... 307
5.2.3 MA-UNITDATA.request ...................................................................................... 307
5.2.3.1 Function .............................................................................................. 307
Authorized licensed use limited to: CHANGSHA UNIV OF SCIENCE AND TECHNOLOGY. Downloaded on April 25,2021 at 11:33:31 UTC from IEEE Xplore. Restrictions apply.
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Copyright © 2021 IEEE. All rights reserved.
5.2.3.2 Semantics of the service primitive ...................................................... 307
5.2.3.3 When generated................................................................................... 308
5.2.3.4 Effect of receipt................................................................................... 308
5.2.4 MA-UNITDATA.indication .................................................................................. 310
5.2.4.1 Function .............................................................................................. 310
5.2.4.2 Semantics of the service primitive ...................................................... 310
5.2.4.3 When generated................................................................................... 311
5.2.4.4 Effect of receipt................................................................................... 311
5.2.5 MA-UNITDATA-STATUS.indication.................................................................. 313
5.2.5.1 Function .............................................................................................. 313
5.2.5.2 Semantics of the service primitive ...................................................... 313
5.2.5.3 When generated................................................................................... 314
5.2.5.4 Effect of receipt................................................................................... 314
6. Layer management........................................................................................................................... 315
6.1 Overview of management model........................................................................................... 315
6.2 Generic management primitives ............................................................................................ 316
6.3 MLME SAP interface ............................................................................................................ 316
6.3.1 Introduction............................................................................................................ 316
6.3.2 Power management................................................................................................ 317
6.3.2.1 Introduction......................................................................................... 317
6.3.2.2 MLME-POWERMGT.request............................................................ 317
6.3.2.3 MLME-POWERMGT.confirm........................................................... 318
6.3.3 Scan........................................................................................................................ 318
6.3.3.1 Introduction......................................................................................... 318
6.3.3.2 MLME-SCAN.request ........................................................................ 318
6.3.3.3 MLME-SCAN.confirm ....................................................................... 322
6.3.3.4 MLME-SCAN-STOP.request ............................................................. 337
6.3.4 Synchronization ..................................................................................................... 337
6.3.4.1 Introduction......................................................................................... 337
6.3.4.2 MLME-JOIN.request .......................................................................... 337
6.3.4.3 MLME-JOIN.confirm ......................................................................... 340
6.3.5 Authenticate ........................................................................................................... 341
6.3.5.1 Introduction......................................................................................... 341
6.3.5.2 MLME-AUTHENTICATE.request .................................................... 341
6.3.5.3 MLME-AUTHENTICATE.confirm ................................................... 342
6.3.5.4 MLME-AUTHENTICATE.indication................................................ 344
6.3.5.5 MLME-AUTHENTICATE.response.................................................. 345
6.3.6 Deauthenticate ....................................................................................................... 347
6.3.6.1 Introduction......................................................................................... 347
6.3.6.2 MLME-DEAUTHENTICATE.request............................................... 347
6.3.6.3 MLME-DEAUTHENTICATE.confirm.............................................. 347
6.3.6.4 MLME-DEAUTHENTICATE.indication .......................................... 348
6.3.7 Associate................................................................................................................ 348
6.3.7.1 Introduction......................................................................................... 348
6.3.7.2 MLME-ASSOCIATE.request............................................................. 349
6.3.7.3 MLME-ASSOCIATE.confirm............................................................ 352
6.3.7.4 MLME-ASSOCIATE.indication ........................................................ 358
6.3.7.5 MLME-ASSOCIATE.response .......................................................... 363
6.3.8 Reassociate............................................................................................................. 367
6.3.8.1 Introduction......................................................................................... 367
6.3.8.2 MLME-REASSOCIATE.request........................................................ 367
6.3.8.3 MLME-REASSOCIATE.confirm....................................................... 371
Authorized licensed use limited to: CHANGSHA UNIV OF SCIENCE AND TECHNOLOGY. Downloaded on April 25,2021 at 11:33:31 UTC from IEEE Xplore. Restrictions apply.
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Copyright © 2021 IEEE. All rights reserved.
6.3.8.4 MLME-REASSOCIATE.indication ................................................... 377
6.3.8.5 MLME-REASSOCIATE.response ..................................................... 383
6.3.9 Disassociate ........................................................................................................... 388
6.3.9.1 MLME-DISASSOCIATE.request ...................................................... 388
6.3.9.2 MLME-DISASSOCIATE.confirm ..................................................... 388
6.3.9.3 MLME-DISASSOCIATE.indication.................................................. 389
6.3.10 Reset....................................................................................................................... 389
6.3.10.1 Introduction......................................................................................... 389
6.3.10.2 MLME-RESET.request....................................................................... 389
6.3.11 Start........................................................................................................................ 390
6.3.11.1 Introduction......................................................................................... 390
6.3.11.2 MLME-START.request ...................................................................... 390
6.3.11.3 MLME-START.confirm ..................................................................... 396
6.3.12 Stop ........................................................................................................................ 397
6.3.12.1 General ................................................................................................ 397
6.3.12.2 MLME-STOP.request ......................................................................... 397
6.3.13 Protocol layer model for spectrum management and radio measurement............. 398
6.3.14 Measurement request ............................................................................................. 401
6.3.14.1 Introduction......................................................................................... 401
6.3.14.2 MLME-MREQUEST.request ............................................................. 401
6.3.14.3 MLME-MREQUEST.indication......................................................... 402
6.3.15 Channel measurement............................................................................................ 403
6.3.15.1 Introduction......................................................................................... 403
6.3.15.2 MLME-MEASURE.request................................................................ 403
6.3.15.3 MLME-MEASURE.confirm............................................................... 403
6.3.16 Measurement report ............................................................................................... 404
6.3.16.1 Introduction......................................................................................... 404
6.3.16.2 MLME-MREPORT.request................................................................ 404
6.3.16.3 MLME-MREPORT.indication ........................................................... 405
6.3.17 Channel switch....................................................................................................... 406
6.3.17.1 MLME-CHANNELSWITCH.request ................................................ 406
6.3.17.2 MLME-CHANNELSWITCH.confirm ............................................... 407
6.3.17.3 MLME-CHANNELSWITCH.indication............................................ 408
6.3.17.4 MLME-CHANNELSWITCH.response.............................................. 409
6.3.18 TPC request............................................................................................................ 410
6.3.18.1 Introduction......................................................................................... 410
6.3.18.2 MLME-TPCADAPT.request .............................................................. 410
6.3.18.3 MLME-TPCADAPT.confirm ............................................................. 411
6.3.19 SetKeys .................................................................................................................. 412
6.3.19.1 MLME-SETKEYS.request ................................................................. 412
6.3.20 DeleteKeys............................................................................................................. 413
6.3.20.1 MLME-DELETEKEYS.request ......................................................... 413
6.3.21 MIC (michael) failure event .................................................................................. 414
6.3.21.1 MLME-MICHAELMICFAILURE.indication.................................... 414
6.3.22 EAPOL................................................................................................................... 415
6.3.22.1 MLME-EAPOL.request...................................................................... 415
6.3.22.2 MLME-EAPOL.confirm..................................................................... 416
6.3.23 SetProtection.......................................................................................................... 416
6.3.23.1 MLME-SETPROTECTION.request................................................... 416
6.3.24 MLME-PROTECTEDFRAMEDROPPED ........................................................... 417
6.3.24.1 MLME-PROTECTEDFRAMEDROPPED.indication ....................... 417
6.3.25 TS management interface ...................................................................................... 418
6.3.25.1 General ................................................................................................ 418
6.3.25.2 MLME-ADDTS.request ..................................................................... 419
Authorized licensed use limited to: CHANGSHA UNIV OF SCIENCE AND TECHNOLOGY. Downloaded on April 25,2021 at 11:33:31 UTC from IEEE Xplore. Restrictions apply.
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Copyright © 2021 IEEE. All rights reserved.
6.3.25.3 MLME-ADDTS.confirm .................................................................... 421
6.3.25.4 MLME-ADDTS.indication ................................................................. 424
6.3.25.5 MLME-ADDTS.response ................................................................... 426
6.3.25.6 MLME-DELTS.request ...................................................................... 429
6.3.25.7 MLME-DELTS.indication.................................................................. 430
6.3.25.8 MLME-ADDTSRESERVE.request.................................................... 431
6.3.25.9 MLME-ADDTSRESERVE.confirm................................................... 432
6.3.25.10 MLME-ADDTSRESERVE.indication ............................................... 433
6.3.25.11 MLME-ADDTSRESERVE.response ................................................. 434
6.3.26 Higher layer synchronization support.................................................................... 434
6.3.26.1 Introduction......................................................................................... 434
6.3.26.2 MLME-HL-SYNC.request ................................................................. 435
6.3.26.3 MLME-HL-SYNC.indication ............................................................. 435
6.3.27 Block Ack .............................................................................................................. 436
6.3.27.1 General ................................................................................................ 436
6.3.27.2 MLME-ADDBA.request..................................................................... 436
6.3.27.3 MLME-ADDBA.confirm ................................................................... 437
6.3.27.4 MLME-ADDBA.indication ................................................................ 439
6.3.27.5 MLME-ADDBA.response .................................................................. 440
6.3.27.6 MLME-DELBA.request ..................................................................... 441
6.3.27.7 MLME-DELBA.indication ................................................................. 442
6.3.28 Schedule element management.............................................................................. 443
6.3.28.1 Introduction......................................................................................... 443
6.3.28.2 MLME-SCHEDULE.request.............................................................. 443
6.3.28.3 MLME-SCHEDULE.indication ......................................................... 444
6.3.29 Vendor-specific action........................................................................................... 445
6.3.29.1 Introduction......................................................................................... 445
6.3.29.2 MLME-VSPECIFIC.request............................................................... 445
6.3.29.3 MLME-VSPECIFIC.indication .......................................................... 446
6.3.30 Neighbor report request ......................................................................................... 447
6.3.30.1 General ................................................................................................ 447
6.3.30.2 MLME-NEIGHBORREPREQ.request............................................... 447
6.3.30.3 MLME-NEIGHBORREPREQ.indication .......................................... 448
6.3.31 Neighbor report response....................................................................................... 449
6.3.31.1 General ................................................................................................ 449
6.3.31.2 MLME-NEIGHBORREPRESP.request ............................................. 449
6.3.31.3 MLME-NEIGHBORREPRESP.indication......................................... 450
6.3.32 Link Measure Request ........................................................................................... 451
6.3.32.1 General ................................................................................................ 451
6.3.32.2 MLME-LINKMEASURE.request ...................................................... 451
6.3.32.3 MLME-LINKMEASURE.confirm ..................................................... 452
6.3.33 MLME SAP interface for resource request ........................................................... 453
6.3.33.1 MLME-RESOURCE-REQUEST.request........................................... 453
6.3.33.2 MLME-RESOURCE-REQUEST.indication ...................................... 454
6.3.33.3 MLME-RESOURCE-REQUEST.response ........................................ 455
6.3.33.4 MLME-RESOURCE-REQUEST.confirm ......................................... 455
6.3.33.5 MLME-RESOURCE-REQUEST-LOCAL.request............................ 456
6.3.33.6 MLME-RESOURCE-REQUEST-LOCAL.confirm........................... 457
6.3.34 MLME SAP interface for remote requests ............................................................ 457
6.3.34.1 MLME-REMOTE-REQUEST.request ............................................... 457
6.3.34.2 MLME-REMOTE-REQUEST.indication........................................... 458
6.3.35 Extended channel switch announcement ............................................................... 458
6.3.35.1 General ................................................................................................ 458
6.3.35.2 MLME-EXTCHANNELSWITCH.request......................................... 459
Authorized licensed use limited to: CHANGSHA UNIV OF SCIENCE AND TECHNOLOGY. Downloaded on April 25,2021 at 11:33:31 UTC from IEEE Xplore. Restrictions apply.
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