android2.3下wpa_supplicant认证超时的问题

目前遇到一个问题，就是wifi突然连接不上任何AP，虽然概率很低，但是问题却比较大。请高手帮忙看看。
串口下会有如下显示：I/wpa_supplicant(30791): Authentication with 00:1a:1e:64:cc:25 timed out.
V/WifiMonitor( 1638): Event [Authentication with 00:1a:1e:64:cc:25 timed out.]---------------------------------------------------------------------------------
/wpa_supplicant(30791): CTRL-EVENT-STATE-CHANGE id=-1 state=2 BSSID=00:00:00:00:00:00
V/WifiMonitor( 1638): Event [CTRL-EVENT-STATE-CHANGE id=-1 state=2 BSSID=00:00:00:00:00:00]
V/WifiStateTracker( 1638): Connection to supplicant established, state=DISCONNECTED
D/NetworkStateTracker( 1638): setDetailed state, old =DISCONNECTED and new state=DISCONNECTED
V/WifiStateTracker( 1638): Changing supplicant state: DISCONNECTED ==> SCANNING
I/wpa_supplicant(30791): Trying to associate with 00:1a:1e:65:6c:a5 (SSID='Universities WiFi' freq=2412 MHz)
I/wpa_supplicant(30791): CTRL-EVENT-STATE-CHANGE id=-1 state=3 BSSID=00:1a:1e:65:6c:a5
V/WifiMonitor( 1638): Event [Trying to associate with 00:1a:1e:65:6c:a5 (SSID='Universities WiFi' freq=2412 MHz)]
V/WifiMonitor( 1638): Event [CTRL-EVENT-STATE-CHANGE id=-1 state=3 BSSID=00:1a:1e:65:6c:a5]
V/WifiStateTracker( 1638): Changing supplicant state: SCANNING ==> ASSOCIATING
D/WifiService( 1638): releaseWifiLockLocked: WifiLock{NetworkLocationProvider type=2 binder=android.os.Binder@461baf58}
I/ActivityManager( 1638): Start proc com.google.android.apps.mapsocationFriend
Service for service com.google.android.apps.maps/com.google.googlenav.friend.android.LocationFriendService: pid=30798 uid=10041 gids={3003, 1015}
E/dalvikvm(30798): could not disable core file generation for pid 30798, errno=1
I/ActivityManager( 1638): Start proc com.miui.weather for broadcast com.miui.weather/.service.ServiceUpdateWeather: pid=30805 uid=10047 gids={3003}
E/dalvikvm(30805): could not disable core file generation for pid 30805, errno=1
D/dalvikvm(30798): GC_FOR_MALLOC freed 2138 objects / 150864 bytes in 90ms
D/su      (30812): 0 /system/bin/sh executing 0 /system/bin/sh using shell /system/bin/sh : sh
D/dalvikvm(30798): GC_FOR_MALLOC freed 2601 objects / 173672 bytes in 57ms
D/dalvikvm(30798): GC_FOR_MALLOC freed 6080 objects / 510400 bytes in 69ms
D/dalvikvm(30755): GC_EXPLICIT freed 2516 objects / 145792 bytes in 81ms
I/wpa_supplicant(30791): Authentication with 00:1a:1e:65:6c:a5 timed out.
V/WifiMonitor( 1638): Event [Authentication with 00:1a:1e:65:6c:a5 timed out.]I/wpa_supplicant(30791): CTRL-EVENT-STATE-CHANGE id=1 state=0 BSSID=00:1a:1e:65:6c:a5
V/WifiMonitor( 1638): Event [CTRL-EVENT-STATE-CHANGE id=1 state=0 BSSID=00:1a:1e:65:6c:a5]
I/wpa_supplicant(30791): CTRL-EVENT-STATE-CHANGE id=-1 state=2 BSSID=00:00:00:00:00:00
V/WifiStateTracker( 1638): Changing supplicant state: ASSOCIATING ==> DISCONNECTED
V/WifiMonitor( 1638): Event [CTRL-EVENT-STATE-CHANGE id=-1 state=2 BSSID=00:00:00:00:00:00]
V/WifiStateTracker( 1638): Changing supplicant state: DISCONNECTED ==> SCANNING
I/wpa_supplicant(30791): Trying to associate with 00:1a:1e:64:cc:25 (SSID='Universities WiFi' freq=2412 MHz)
I/wpa_supplicant(30791): CTRL-EVENT-STATE-CHANGE id=-1 state=3 BSSID=00:1a:1e:64:cc:25
V/WifiMonitor( 1638): Event [Trying to associate with 00:1a:1e:64:cc:25 (SSID='Universities WiFi' freq=2412 MHz)]
V/WifiMonitor( 1638): Event [CTRL-EVENT-STATE-CHANGE id=-1 state=3 BSSID=00:1a:1e:64:cc:25]
V/WifiStateTracker( 1638): Changing supplicant state: SCANNING ==> ASSOCIATING
D/WifiStateTracker( 1638): Reset connections and stopping DHCP
D/dalvikvm(30798): GC_FOR_MALLOC freed 9360 objects / 598952 bytes in 74ms
D/WifiStateTracker( 1638): Disabling interface
D/NetworkStateTracker( 1638): setDetailed state, old =DISCONNECTED and new state=DISCONNECTED
I/wpa_supplicant(30791): Authentication with 00:1a:1e:64:cc:25 timed out.
I/wpa_supplicant(30791): CTRL-EVENT-STATE-CHANGE id=1 state=0 BSSID=00:1a:1e:64:cc:25
V/WifiMonitor( 1638): Event [Authentication with 00:1a:1e:64:cc:25 timed out.]
V/WifiMonitor( 1638): Event [CTRL-EVENT-STATE-CHANGE id=1 state=0 BSSID=00:1a:1e:64:cc:25]
I/wpa_supplicant(30791): CTRL-EVENT-STATE-CHANGE id=-1 state=2 BSSID=00:00:00:00:00:00
V/WifiStateTracker( 1638): Changing supplicant state: ASSOCIATING ==> DISCONNECTED
V/WifiMonitor( 1638): Event [CTRL-EVENT-STATE-CHANGE id=-1 state=2 BSSID=00:00:00:00:00:00]
V/WifiStateTracker( 1638): Changing supplicant state: DISCONNECTED ==> SCANNING
I/wpa_supplicant(30791): Trying to associate with 00:1a:1e:64:cc:25 (SSID='Universities WiFi' freq=2412 MHz)
I/wpa_supplicant(30791): CTRL-EVENT-STATE-CHANGE id=-1 state=3 BSSID=00:1a:1e:64:cc:25
V/WifiMonitor( 1638): Event [Trying to associate with 00:1a:1e:64:cc:25 (SSID='Universities WiFi' freq=2412 MHz)]
V/WifiMonitor( 1638): Event [CTRL-EVENT-STATE-CHANGE id=-1 state=3 BSSID=00:1a:1e:64:cc:25]
V/WifiStateTracker( 1638): Changing supplicant state: SCANNING ==> ASSOCIATING