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Fedora 15：Netgear WG111v2 在短时间后变得非常慢

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Fedora 15：Netgear WG111v2 在短时间后变得非常慢

在 Fedora 15 下，我的 Netgear WG111v2 (USB) 适配器可以很好地连接到我的 AP，允许大约 800 kbps 的正常下载速率持续约 20 秒，然后降至约 100kbps。这是什么原因造成的，我该如何将其更改为正常行为？在 Windows 下，800kbps 的速率是正常的。有趣的是，dmesg 中有一些 cfg80211 的输出（见下文）。

iwconfig wlan0 的输出：

wlan0     IEEE 802.11bg  ESSID:"xxx"  
      Mode:Managed  Frequency:2.457 GHz  Access Point: xx:xx:xx:xx:xx:xx   
      Bit Rate=54 Mb/s   Tx-Power=20 dBm   
      Retry  long limit:7   RTS thr:off   Fragment thr:off
      Power Management:off
      Link Quality=48/70  Signal level=-62 dBm  
      Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
      Tx excessive retries:0  Invalid misc:74139   Missed beacon:0

dmesg：

[19860.248887] cfg80211: World regulatory domain updated:
[19860.248890] cfg80211:     (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[19860.248893] cfg80211:     (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[19860.248895] cfg80211:     (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[19860.248897] cfg80211:     (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[19860.248899] cfg80211:     (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[19860.248901] cfg80211:     (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[19860.248911] cfg80211: Calling CRDA for country: AT
[19860.252536] cfg80211: Regulatory domain changed to country: AT
[19860.252539] cfg80211:     (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[19860.252543] cfg80211:     (2402000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm)
[19860.252545] cfg80211:     (5170000 KHz - 5250000 KHz @ 40000 KHz), (N/A, 2000 mBm)
[19860.252548] cfg80211:     (5250000 KHz - 5330000 KHz @ 40000 KHz), (N/A, 2000 mBm)
[19860.252551] cfg80211:     (5490000 KHz - 5710000 KHz @ 40000 KHz), (N/A, 2700 mBm)
[19861.857688] wlan0: authenticate with xx:xx:xx:xx:xx:xx (try 1)
[19861.859561] wlan0: authenticated
[19861.967688] wlan0: associate with xx:xx:xx:xx:xx:xx  (try 1)
[19861.969696] wlan0: RX ReassocResp from xx:xx:xx:xx:xx:xx  (capab=0x431 status=0 aid=2)
[19861.969699] wlan0: associated

答案1

通常，这种减速是由于您的无线适配器 Tx 功率过高。然后 AP 会降低其 Rx 灵敏度，您会感觉到减速。

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