無線網路功率3mW測速結果

最近換了新的AP: ASUS RT-N18U

我直接把它刷成Tomato,並測試了最低功率能調到多低

2016-04-21 21:28:41 的螢幕擷圖

經過iPhone測速之後發現,其實只要3mW就夠普通家用環境使用

檔案_000

SpeedTest測速認證

另外還有OpenWRT以及DD-WRT都可以調到超低功率

補充1: dBm與mW轉換

補充2: TP-Link TL-WR841N刷OpenWRT

補充3: 建議Tomato、DD-WRT,若不行再用OpenWRT,因為OpenWRT可能沒有網頁介面

P.S.

802.11n
11channel 2.462Ghz
20Mhz Width

AP Isolation: On can prevent WiFi local virus spreading
Beacon: 128ms
Distance/ACK: 24meter for home usage prevent UFO hack
DTIM Interval: 64ms
Fragmentation Threshold: 2304ms
RTS Threshold: 2295ms
Transmit Power: 3mW~5mW is enough for home usage
(Original Transmit Power Design is 42mW, Increase power when earth magnetic field in wrong direction. Must smaller than power design to avoid damage)

# 288*8=2304,288*255/256*8=2295
# This can load 288 solar energy in 256 phase/slice QAM
# 24meter is also related to solar wave packet!!
# 42mW in 2.4Ghz is also related to solar energy!! :D
# 64ms, 128ms is related to solar frequency, when earth have a noise, it is also good!!

# Sad: Earth is not stable after moon or its spare come here.

GEM of the Earth
LCM(208,144)=1872
GCD(208,144)=16
Fragmentation Threshold=1872
RTS Threshold=1872-16=1856

GEM of the Solar
LCM(208,128)=1664
GCD(208,128)=16
Fragmentation Threshold=1664
RTS Threshold=1664-16=1648

GEM of the Galaxy to Sun
LCM(4096,208)=53248
GCD(4096,208)=16

GEM of the Galaxy to Earth
LCM(4096,288)=36864
GCD(4096,288)=32

Combine:
208 = 2^4 * 13
288 = 2^5 * 3^2
256 = 2^8
-> ( 2^8 * 3^2 * 13 = 29952 ) / ( 2^4 = 16 ) = 1876
Fragmentation Threshold=1876-sqrt(144)=1864
Fragmentation Threshold=1876
RTS Threshold=1876-19-13-11=1833
RTS Threshold=1876-13-11=1851
RTS Threshold=1876-11=1865
Orbit: Earth11, Venus13, Mercury19

Maximum Clients=128 *Maximum Concurrent Communication Object On The Track

 

TP-Link TL-WR841N刷OpenWRT

1.先到OpenWRT的Hardware List找到你的機器型號

2.通常一個機器型號還會有分許多版本的硬體 EX: TL-WR841N v8

3.下載正確版本的Firmware,本篇範例為v8.x (international) 

4.此Firmware名稱上有"factory"即表示可以由原廠韌體透過網頁更新

841n_flash

5.如果是要更新韌體,請下載sysupgrade版本

2016-04-22 10:52:25 的螢幕擷圖

6.更新好重開後就會換成LuCI介面,有時自動重開異常要拔插頭重開甚至30/30/30Reset

7.試著把wifi調到最低功率再慢慢調高到適合你的功率,3dBm為本機器最低功率約為2mW,測速結果 (其實速度取決於晶片組及天線數量,除非服務範圍很廣,不然低功率即可,建議以多部低功率取代高功率,可達到較好的通訊品質)

2016-04-22-112710-的螢幕擷圖

補充:30/30/30重設 在電源插上的時候按住reset按鈕30秒,拔下插頭持續按30秒,再插上插頭仍然繼續按住30秒,即可完全重設。如果是ASUS產品則會進入Recovery Mode (可以刷韌體的網頁介面)