Fedora 17 wireless disconnection

[wabrosch]

Hi,
a few days ago I installed F17.
Now I have a problem. At heavy wireless load it disconnects about every 5 min from my wireless router. then I have to manualy refresh wireless connection of F17.

Here the specifications:
Notebook Lenovo W520

Wireless Card:

03:00.0 Network controller: Intel Corporation Centrino Ultimate-N 6300 (rev 35)
        Subsystem: Intel Corporation Centrino Ultimate-N 6300 3x3 AGN
        Flags: bus master, fast devsel, latency 0, IRQ 54
        Memory at f4900000 (64-bit, non-prefetchable) [size=8K]
        Capabilities: <access denied>
        Kernel driver in use: iwlwifi

and this is the error message I get from the log:

Jun 11 11:32:14 seventeen kernel: [116537.166085] iwlwifi 0000:03:00.0: Queue 11 stuck for 2000 ms.
Jun 11 11:32:14 seventeen kernel: [116537.166088] iwlwifi 0000:03:00.0: Current SW read_ptr 100 write_ptr 67
Jun 11 11:32:14 seventeen kernel: [116537.166139] iwlwifi 0000:03:00.0: Current HW read_ptr 100 write_ptr 67
Jun 11 11:32:14 seventeen kernel: [116537.166140] iwlwifi 0000:03:00.0: On demand firmware reload
Jun 11 11:32:14 seventeen kernel: [116537.166874] ieee80211 phy0: Hardware restart was requested
Jun 11 11:32:14 seventeen kernel: [116537.166976] iwlwifi 0000:03:00.0: L1 Enabled; Disabling L0S
Jun 11 11:32:14 seventeen kernel: [116537.167197] iwlwifi 0000:03:00.0: Radio type=0x0-0x3-0x1

Thanks for any help.