IEEE 802.11
- IEEE 802.11
- OFDMA
- BSS Coloring
- Beamforming
- WPA3
- WEP
- WDS
- AP - Access Point
- Station = AP
- Plug-n-Share
- IBBS - Ad Hoc
- 802.11k/v/r - WiFi 快 速漫游协议
- IEEE 802.11n - Wi-Fi 4
- 150Mbps - 低端规格
- 300Mbps - 目前常见
- AC - IEEE 802.11ac - Wi-Fi 5
- AX - IEEE 802.11ax - Wi-Fi 6
- AX1800 -> 1800 Mbps
- 2.4 GHz 574 Mbps + 5 GHz 1201 Mbps
| WiFi 4 | WiFi 5 | WiFi 6/6E | WiFi 7 |
|---|
| Date | 2007 | 2013 | 2019/2021 | 2024 |
| IEEE | 802.11n | 802.11ac | 802.11ax | 802.11be |
| Date Rate | 1.2Gbps | 3.5Gbps | 9.6Gbps | 46Gbps |
| Bands | 2.5,5GHz | 5GHz | 2.5,5GHz/6GHz | 1-7.25GHz |
| Security | WPA2 | WPA2 | WPA3 | WPA3 |
| Channels | 20,40MHz | 20,40,80,80+80,160MHz | same as WiFi 5 | <= 320MHz |
| Modulation | 64 QAM, OFDM | 256 QAM, OFDM | 1024 QAM, OFDMA | 4096 QAM, OFDMA |
| MIMO | 4x4 MIMO | 4x4 MIMO,DL MU-MIMO | 8x8 UL/DL MU-MIMO | 16x16 MU-MIMO |
- WiFi 7 - 9.6 Gbpsx1.2x2x2=46 Gbps
traffic
| IEEE | Data Rate |
|---|
| IEEE 802.11a | 54 Mbps |
| IEEE 802.11b | 11 Mbps |
| IEEE 802.11g | 54 Mbps |
| IEEE 802.11n | 450 Mbps |
| IEEE 802.11ac | 1734 Mbps |
| 1024QAM (2.4GHz) | 750 Mbps |
| 1024QAM (5GHz) | 2167 Mbps |
| IEEE | for |
|---|
| 802.11s | mesh networking |
| 802.11r | |
| 802.11w | |
- IEEE 802.11ax
- 替代 IEEE 802.11ac
- 用于高密度场景
- OFDMA - Orthogonal frequency-division multiple access
- Wi-Fi 6 - 2.4 GHz, 5 GHz
- Wi-Fi 6E - 6 GHz
WiFi Roaming
- Scanning
- Authentication
- Re-association
- 常见 AP 自带功能 - 无线客户端的信号低于设定值主动断开连接
Mesh
- 硬件 - IEEE 802.11s
- 动态链路状态
- B.A.T.M.A.N. - Better Approach To Mobile Adhoc Networking
- OLSR - Optimized Link State Routing
- OSPF
- AC+AP - 最佳、需要预布线
Security