On Fri, Mar 11, 2011 at 9:08 PM, Luis Correia <luis.f.correia@xxxxxxxxx> wrote: > Hi > > On Fri, Mar 11, 2011 at 20:04, Juan Carlos Garza > <juancarlosgarza@xxxxxxxxx> wrote: >> Hello >> >> I have a Ralink 3071 usb device (Bus 002 Device 003: ID 07b8:3071 >> D-Link Corp. 802.11n/b/g Mini Wireless LAN USB2.0 Adapter). >> I am using the mac80211 driver by compiling the compat-wireless >> tarball from yesterday (10 March). I cross compile it with the 2.6.24 >> kernel in a Montavista distribution (and also with 2.6.27 in Fedora) >> >> It works pretty good in AP mode using HostAPD and DCHP and I get >> relative good transfer rates (up to 3.5 MBytes per second). >> >> My problems are with Ad-Hoc connections. I can configure the Ad-Hoc >> connection, for example: >> >> iwconfig wlan0 mode ad-hoc >> iwconfig wlan0 essid my_ad_hoc_nt >> iwconfig wlan0 key 1122334455 >> ifconfig wlan0 192.168.111.44 up >> >> It works and I connect to it on the other end (a windows machine with >> a compatible static ip address), however, it only works for doing >> small data transfer rate things like browsing through the directories >> of a shared folder or retrieving web pages from a web server. When I >> try to do something like transferring a 500 MByte file, it starts >> transferring, reaches a peak and then it drops to 0 again. After that, >> the file is no longer transferred and I cannot do anything else (can't >> ping). >> >> Is this a known issue? Any ideas? >> >> Juan Carlos >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-wireless" in >> the body of a message to majordomo@xxxxxxxxxxxxxxx >> More majordomo info at http://vger.kernel.org/majordomo-info.html >> > > keep in mind that current (and by design) ad-hoc connections max out at 11Mb. Thanks for the comment, Mhh, I've been benchmarking some other chipsets in ad-hoc mode (like the rtl8188cus) and they do not present these problems (only a slow transfer rate). > > there may be some buffer bottleneck involved. > I tried changing the MTU and other parameters, and nothing... > but I'm not a very good expert on this subject. > > > Luis Correia > -- ________________________________ M.Sc. Juan Carlos Garza Fernández Chistophstr. 14 70178 Stuttgart, Deutschland +49 711 4080769 +49 176 21947676 juancarlosgarza@xxxxxxxxx ________________________________ -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
