"802.11AX WiFi 6E官方协议: IEEE标准的高效WLAN增强"
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更新于2023-12-27
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"802.11AX WiFi 6E是一种官方协议，旨在为信息技术领域的无线局域网（WLAN）提供更高效的接入控制和物理层规范。这项标准由IEEE（Institute of Electrical and Electronics Engineers）制定，是针对局域网和城域网之间的通信和信息交换的特定要求的一部分。该协议的修订版，即IEEE Std 802.11ax™‐2021，是IEEE Std 802.11‐2020的修订版本，是由IEEE计算机协会的局域网/城域网标准委员会开发的。
802.11AX WiFi 6E的官方协议涵盖了无线局域网介质访问控制（MAC）和物理层（PHY）规范的增强功能，旨在提高WLAN的效率。这项标准追求更高的无线网络性能，以满足日益增长的无线设备连接需求，包括在高密度环境中实现更好的吞吐量和更低的延迟。
该协议提供了一系列的现代化特性，包括更好的频谱利用、更高的数据速率、更低的功耗以及更好的网络容量。这些特性将对各种应用和场景产生积极影响，从家庭和企业的无线网络覆盖到公共场所和运营商网络。
在802.11AX WiFi 6E的官方协议中，对多用户多输入多输出技术（MU-MIMO）、基础设施和设备之间的协同性、频谱利用的增强、调制和编码的改进等方面做出了各种规范。
具体来说，802.11AX WiFi 6E标准在物理层规范上引入了更高的数据传输速率，支持更大的带宽，使得设备能够更快速地传输数据。在介质访问控制方面，新的标准为多用户的数据访问和传输提供了更高的效率和灵活性，从而提高了网络的整体表现。
该协议的发布让设备制造商、网络设备供应商和服务提供商能够更好地满足用户对高性能和高效率无线网络的需求。同时，用户也能够通过使用符合该标准的设备，体验到更快速、更可靠的无线连接，从而改善其网络体验。
总的来说，802.11AX WiFi 6E的官方协议标志着无线局域网技术迈向了新的里程碑，为未来的无线通信和连接提供了更强大的支持和指导。这将对各领域的网络通信和应用产生深远的影响，并推动无线网络技术的不断发展与创新。"
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10.6.5 Rate selection for Data and Management frames ...................................................... 244
10.6.5.1 Rate selection for non-STBC Beacon and non-STBC PSMP frames...... 244
10.6.5.3 Rate selection for other group addressed Data and Management frames 245
10.6.6 Rate selection for Control frames .............................................................................. 245
10.6.6.1 General rules for rate selection for Control frames ................................. 245
10.6.6.6 Channel Width selection for Control frames ........................................... 245
10.6.10 Modulation classes..................................................................................................... 246
10.6.11 Non-HT basic rate calculation ................................................................................... 247
10.6.12 Channel Width in non-HT and non-HT duplicate PPDUs ........................................ 248
10.6.13 Rate selection constraints for VHT STAs.................................................................. 248
10.6.13.3 Additional rate selection constraints for VHT PPDUs ............................ 248
10.8 HT Control field operation ...................................................................................................... 249
10.9 Control Wrapper operation ...................................................................................................... 251
10.11 A-MSDU operation.................................................................................................................. 251
10.12 A-MPDU operation.................................................................................................................. 252
10.12.1 A-MPDU contents ..................................................................................................... 252
10.12.2 A-MPDU length limit rules ....................................................................................... 252
10.12.3 Minimum MPDU Sstart Sspacing field rules ............................................................ 254
10.12.4 A-MPDU aggregation of group addressed Data frames ............................................ 254
10.12.6 A-MPDU padding for VHT PPDU, HE, or S1G PPDU............................................ 256
10.12.7 Setting the EOF/Tag field of the MPDU delimiter.................................................... 256
10.13 PPDU duration constraint ........................................................................................................ 256
10.15 Low-density parity check code (LDPC) operation .................................................................. 256
10.22 Operation across regulatory domains ...................................................................................... 257
10.22.3 Operation with operating classes ............................................................................... 257
10.22.4 Operation with the Transmit Power Envelope element ............................................. 258
10.23 HCF.......................................................................................................................................... 259
10.23.1 General....................................................................................................................... 259
10.23.2 HCF contention based channel access (EDCA) ........................................................ 259
10.23.2.2 EDCA backoff procedure ........................................................................ 259
10.23.2.4 Obtaining an EDCA TXOP ..................................................................... 260
10.23.2.5 EDCA channel access in a VHT, HE, or TVHT BSS ............................. 261
10.23.2.7 Sharing an EDCA TXOP......................................................................... 262
10.23.2.8 Multiple frame transmission in an EDCA TXOP.................................... 263
10.23.2.9 TXOP limits............................................................................................. 265
10.23.2.10 Truncation of TXOP ................................................................................ 267
10.23.2.11 Termination of TXOP.............................................................................. 267
10.23.2.12 Retransmit procedures ............................................................................. 267
10.23.3 HCF controlled channel access (HCCA) ................................................................... 268
10.23.3.5 HCCA transfer rules ................................................................................ 268
10.25 Block acknowledgment (block ack) ........................................................................................ 268
10.25.2 Setup and modification of the block ack parameters................................................. 268
10.25.5 Selection of BlockAck and BlockAckReq variants................................................... 268
10.25.6 HT-immediate block ack extensions.......................................................................... 269
10.25.6.1 Introduction to HT-immediate block ack extensions............................... 269
10.25.6.3 Scoreboard context control during full-state operation ........................... 270
10.25.6.5 Generation and transmission of BlockAck frames by an HT STA,
DMG STA, or S1G STA.......................................................................... 270
10.25.6.6 Receive reordering buffer control operation............................................ 270
10.25.8 GCR and GLK-GCR block ack ................................................................................. 271
10.25.8.1 Introduction General ................................................................................ 271
10.25.8.4 GCR block ack BlockAckReq and BlockAck frame exchanges ............. 271
10.27 Protection mechanisms ............................................................................................................ 273
10.27.6 Protection rules for HE STAs .................................................................................... 273
Authorized licensed use limited to: Universidad Nacional Autonoma De Mexico (UNAM). Downloaded on March 06,2023 at 03:10:29 UTC from IEEE Xplore. Restrictions apply.
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