Hi Bruce,
It appears that Google have just acknowledged that a patch [from
upstream wpa_supplicant] has gone into the Android code tree, and will be
part of the "next major release of Android":
http://code.google.com/p/android/issues/detail?id=8804#c28
... regarding the bits you picked out below, we have Cisco WiSMs, with WMM
enabled - my HTC Desire works ok, my testing hasn't been much more than
with that so far - the majority of our users return from summer vacation
next week...
-James
--
James J J Hooper
Network Specialist
Information Services
University of Bristol
http://www.wireless.bristol.ac.uk
--
On 30/09/2010 13:24, Osborne, Bruce W wrote:
Very useful information, James.
The most interesting quote from the second link is this:
===
The partial fix for getting Android 2.2 to connect to 802.1x secured network on
Aruba Aps was to disable 'Wireless Multimedia U-APSD (WMM-UAPSD) Powersave' in
the advanced properties of the SSID profile. This is enabled by default.
In the 802.1x Authentication Profile Changing the 'WEP Key Message Retry Count'
value to 3, the 'Interval between WPA/WPA2 Key messages' to 3000msec, the
WPA/WPA2 Key Message Retry Count' to 3, and disabling 'Opportunistic Key
Caching' seems to make things more reliable. These are the new defaults in
ArubaOS 5.x, but were set lower by default in earlier versions.
We have also found that not using an anonymous identity makes authentication
more reliable, so it seems there could be an issue both in the WLAN driver and
in the 802.1x supplicant.
We do still have to tell Android to forget the network then re-enter my
credentials if WLAN is turned off though...
===
It is difficult following the "alphabet soup" of acronyms. If the above posting
is correct, part of the problem appears to be an issue with WMM-PS and, more
specifically, WMM-UAPSD. These are features I would expect on any multimedia mobile
device to save battery life. Disabling WMM would disable the power saving features, but
also disable QoS. Disabling WMM-UAPSD could reduce battery life on any device on that
WLAN that properly supports WMM-UAPSD.
As I understand it, a WMM-UAPSD supported AP buffers data for devices and
releases the data in response to a trigger packet from the client. This enables
the client to periodically enter a low power state, preserving battery life.
===
Glossary:
WMM: Wi-Fi Multimedia certification used for QoS on a Wi-Fi network
WMM-PS: Wi-Fi Multimedia Power Save certification
WMM-UAPSD: Wi-Fi Multimedia Unscheduled Automatic Power Save Delivery
QoS: Quality of Service tagging on a network used to prioritize voice& video
traffic.
===
Bruce Osborne
Network Engineer - Wireless& NAC
Liberty University
-----Original Message-----
From: James J J Hooper [mailto:jjj.hoo...@bristol.ac.uk]
Sent: Wednesday, September 29, 2010 3:42 PM
Subject: Re: Android 2.2 disappointing on the secure WLAN- is it just us?
On 29/09/2010 18:55, Lee H Badman wrote:
We have three cases of Droid smartphones that worked wonderfully on our
802.1x/WPA2 WLAN on Android 2.1 operating system. Since going to 2.2 with
the devices, getting them to connect to the secure wireless network is
almost impossible. Open networks are OK.
There are known issues:
http://code.google.com/p/android/issues/detail?id=8804
http://www.google.co.uk/support/forum/p/android/thread?tid=7f71ff06702e39e1
We have found that Android 2.2 "works" on our WPA2/AES eduroam, but
roaming and re-auth are not reliable.
HTC build 2.10.405.2 appears to improve things, but it's still not
brilliant...
Regards,
James
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