imported>Addonian1123 来自 2026年5月28日 (四) 10:24

2026-05-28T10:24:35Z

新页面

{{更新|time=2022-06-23T15:26:54+00:00}}
{{NoteTA|G1=IT|G2=Communication}}
{{Wi-Fi世代}}
'''Wi-Fi 7'''，或'''IEEE 802.11be'''，是計劃中[[IEEE 802.11|802.11]] [[IEEE]]標準的下一次修訂<ref>{{Cite web|title=IEEE P802.11 EXTREMELY HIGH THROUGHPUT Study Group|url=http://www.ieee802.org/11/Reports/ehtsg_update.htm|website=www.ieee802.org|archive-url=https://web.archive.org/web/20190324170612/http://www.ieee802.org/11/Reports/ehtsg_update.htm|archive-date=2019-03-24|access-date=2019-05-20|dead-url=no}}</ref>，該標準是基於[[IEEE 802.11ax|802.11ax]]的修訂，專注於室內外的[[WLAN]]運作，面向固定的或者行人速度的設備，頻率則定在2.4、5或6 GHz。<ref>{{Cite arXiv|title=IEEE 802.11be - Extremely High Throughput: The Next Generation of Wi-Fi Technology Beyond 802.11ax|last=López-Pérez|first=David|date=12 Feb 2019|class=cs.IT|eprint=1902.04320}}</ref>

802.11be還在修訂的過程中，在2021年3月發表初版草稿，而最終標準定於2024上半年發佈。<ref name="ieee-wifi7">{{Cite web |last=Khorov |first=Evgeny |date=2020-05-08 |title=Current Status and Directions of IEEE 802.11be, the Future Wi-Fi 7 |url=https://ieeexplore.ieee.org/document/9090146 |access-date=2020-08-20 |website=[[IEEE]] |archive-date=2020-09-19 |archive-url=https://web.archive.org/web/20200919073727/https://ieeexplore.ieee.org/document/9090146/ |dead-url=no }}</ref>

== 候選特性 ==
在802.11be企劃授權征求會（PAR）上提及了下列的候選特性：<ref>{{Cite web|url=https://mentor.ieee.org/802.11/dcn/18/11-18-1233-06-0eht-eht-draft-proposed-csd.docx|title=802.11be Project Authorization Request (PAR)|accessdate=2020-08-24|archive-date=2020-06-10|archive-url=https://web.archive.org/web/20200610101543/https://mentor.ieee.org/802.11/dcn/18/11-18-1233-06-0eht-eht-draft-proposed-csd.docx|dead-url=no}}</ref>

* 320 MHz的信道寬度，高效地利用充裕的[[頻譜]]，
* 多頻寬／多信道聚合運作，
* 16個[[空間流]]，多輸入多輸出 ([[MIMO]]) 協議改進，
* 接入點（AP）間協調（傳輸協調與聯合傳輸），
* 更高級的鏈路適應和重新傳輸協議（例如混合自動重請求（HARQ）），
* 為6 GHz頻譜的監管法規作相應適配，
* 集成[[時效性網路]]（TSN）擴展，應對低時延實時流量（IEEE 802.11aa）。<ref>{{Cite web |url=https://datatracker.ietf.org/meeting/106/materials/slides-106-raw-04-ieee-status-00 |title=存档副本 |accessdate=2020-08-24 |archive-date=2020-06-12 |archive-url=https://web.archive.org/web/20200612105240/https://datatracker.ietf.org/meeting/106/materials/slides-106-raw-04-ieee-status-00 |dead-url=no }}</ref>

== 額外特性 ==

除了在PAR會議上提到的特性外，還有幾項新引入的特性：<ref>{{Cite journal|url=https://ieeexplore.ieee.org/document/9090146|title=Current Status and Directions of IEEE 802.11be, the Future Wi-Fi 7|authors=E. Khorov, I. Levitsky, I. F. Akyildiz|publisher=IEEE|issue=in press|doi=10.1109/ACCESS.2020.2993448|edition=|volume=8|pages=88664-88688|pmid=|docket=|quote=|doi-access=free|author-link=|journal=IEEE Access|section=|year=2020|access-date=2020-08-24|archive-date=2020-09-19|archive-url=https://web.archive.org/web/20200919073727/https://ieeexplore.ieee.org/document/9090146/|dead-url=no}}</ref>

* 全新的4096-QAM（4K-QAM），
* 對擁塞和頻譜和充裕的頻譜分別引入320/160+160 MHz和240/160+80 MHz帶寬，
* 新的幀格式，改進的前向兼容，
* 改進[[正交頻分多址]]（OFDMA）的資源分配，
* 改進{{le|信道探測|channel sounding}}，降低探測時間，隱式信道探測，更靈活的前导码打孔（preamble puncturing）方法，
* 對直接鏈路的支持，由接入點主導。

==速率表==
{| class="wikitable"
|+
调制编码方案(MCS)
! rowspan="3" |MCS索引{{Efn-lr|MCS 9并不适用于所有频道宽度和空间流数的组合。}}
! rowspan="3" |调制方式
! rowspan="3" |编码率
! colspan="15" |数据速率(Mbit/s){{Efn-lr|对于每个空间流}}
|-
! colspan="3" |20 MHz
! colspan="3" |40 MHz
! colspan="3" |80 MHz
! colspan="3" |160 MHz
! colspan="3" |320 MHz
|-
!3200 ns {{Tsl|en|Guard interval||GI}}
!1600 ns GI
!800 ns GI
!3200 ns GI
!1600 ns GI
!800 ns GI
!3200 ns GI
!1600 ns GI
!800 ns GI
!3200 ns GI
!1600 ns GI
!800 ns GI
!3200 ns GI
!1600 ns GI
!800 ns GI
|-
|0
|BPSK
|1/2
|7
|8
|9
|15
|16
|17
|31
|34
|36
|61
|68
|72
|123
|136
|144
|-
|1
|QPSK
|1/2
|15
|16
|17
|29
|33
|34
|61
|68
|72
|122
|136
|144
|245
|272
|288
|-
|2
|QPSK
|3/4
|22
|24
|26
|44
|49
|52
|92
|102
|108
|184
|204
|216
|368
|408
|432
|-
|3
|16-QAM
|1/2
|29
|33
|34
|59
|65
|69
|123
|136
|144
|245
|272
|282
|490
|544
|577
|-
|4
|16-QAM
|3/4
|44
|49
|52
|88
|98
|103
|184
|204
|216
|368
|408
|432
|735
|817
|865
|-
|5
|64-QAM
|2/3
|59
|65
|69
|117
|130
|138
|245
|272
|288
|490
|544
|576
|980
|1089
|1153
|-
|6
|64-QAM
|3/4
|66
|73
|77
|132
|146
|155
|276
|306
|324
|551
|613
|649
|1103
|1225
|1297
|-
|7
|64-QAM
|5/6
|73
|81
|86
|146
|163
|172
|306
|340
|360
|613
|681
|721
|1225
|1361
|1441
|-
|8
|256-QAM
|3/4
|88
|98
|103
|176
|195
|207
|368
|408
|432
|735
|817
|865
|1470
|1633
|1729
|-
|9
|256-QAM
|5/6
|98
|108
|115
|195
|217
|229
|408
|453
|480
|817
|907
|961
|1633
|1815
|1922
|-
|10
|1024-QAM
|3/4
|110
|122
|129
|219
|244
|258
|459
|510
|540
|919
|1021
|1081
|1838
|2042
|2162
|-
|11
|1024-QAM
|5/6
|122
|135
|143
|244
|271
|287
|510
|567
|600
|1021
|1134
|1201
|2042
|2269
|2402
|-
|12
|4096-QAM
|3/4
|131
|146
|155
|263
|293
|310
|551
|613
|649
|1103
|1225
|1297
|2205
|2450
|2594
|-
|13
|4096-QAM
|5/6
|146
|163
|172
|293
|325
|344
|613
|681
|721
|1225
|1361
|1441
|2450
|2722
|2882
|-
|14
|BPSK-DCM-DUP
|1/2
|
|
|
|
|
|
|7
|8
|9
|15
|17
|18
|31
|34
|36
|-
|15
|BPSK-DCM
|1/2
|4
|4
|4
|7
|8
|9
|15
|17
|18
|31
|34
|36
|61
|68
|72
|}

{{notelist-lr|30em}}

== 參考文獻 ==
{{Reflist}}

{{IEEE standards}}
{{Authority control}}

[[Category:IEEE 802.11|bx]]

Wi-Fi 7 - 版本历史

imported>Addonian1123 来自 2026年5月28日 (四) 10:24