Search Linux Wireless

Re: Latency and connection problems with a carl9170-based AP

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Wednesday, September 14, 2011 01:19:59 PM Harshal Chhaya wrote:
> Most of the disconnects seem to be caused by beacons that update the
> TIM IE but not the overall length. The result is a corrupted RSN IE
> (e.g. the IE length says 20 bytes but the IE is only 19 bytes in size)
> which causes the clients to disconnect. This problem lasts for only
> one beacon (i.e. the next beacon has the right size) but it is enough
> to cause the clients to disconnect. Is there a way to fix this?
Now that is really interesting. Do you know if the TIM IE is generated
properly by ieee80211_beacon_add_tim in net/mac80211/tx.c?
 
> Another problem when power save is enabled is the large and
> unpredictable latency. I understand how enabling power save can
> increase latency but my ping times go from 3-4 ms without power save
> to a wide range of 3 ms - 3 s after I enable power save. I am trying
> smaller beacon intervals to reduce this latency but even at a beacon
> interval of 25ms, I get ping times of up to ~400 ms. How do I reduce
> this wide variation in latency.
What's the listen interval of your stations?
Maybe max_listen_interval=1 in hostapd.conf helps.

Regards,
	Chr
--
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


[Index of Archives]     [Linux Host AP]     [ATH6KL]     [Linux Bluetooth]     [Linux Netdev]     [Kernel Newbies]     [Linux Kernel]     [IDE]     [Security]     [Git]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Linux ATA RAID]     [Samba]     [Device Mapper]
  Powered by Linux