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| author | Koen Vandeputte <koen.vandeputte@ncentric.com> | 2018-11-05 11:31:12 +0100 |
|---|---|---|
| committer | Koen Vandeputte <koen.vandeputte@ncentric.com> | 2018-11-06 11:49:27 +0100 |
| commit | 5ac34818f9c3ad46febc260f8ae348e05b9c8f00 (patch) | |
| tree | 8f5b8dbb1f3532d9c3d525ebcbd3bcf97fcd5f0d /package/kernel/mac80211/patches/ath/557-ath9k-dynack-remove-experimental-tag.patch | |
| parent | 860de2e1aa9deac7dce76b7f85cb5fcfbba00468 (diff) | |
| download | upstream-5ac34818f9c3ad46febc260f8ae348e05b9c8f00.tar.gz upstream-5ac34818f9c3ad46febc260f8ae348e05b9c8f00.tar.bz2 upstream-5ac34818f9c3ad46febc260f8ae348e05b9c8f00.zip | |
ath9k: fix dynack in IBSS mode
Currently, dynack was only tested upstream using AP/STA mode.
Testing it on IBSS, showed that late-ack detection was broken.
This is caused due to dynack using Association Request/Response
frames for late-ack detection, which IBSS does not use.
Also allowing Authentication frames here solves this.
A second issue also got fixed, which was also seen AP/STA mode:
When a station was added, the estimated value would be exponentially averaged
using 0 as a starting point.
This means that on larger distances, the ack timeout was still not high
enough before synchronizing would run out of late-ack's for estimation.
Fix this by using the initial estimated value as a baseline
and only start averaging in the following estimation rounds.
Test setup:
- 2x identical devices: RB912UAG-5HPnD + 19dB sector
- IBSS
- 2x2 802.11an (ar9340), HT20, long GI
- RSSI's -70 / -71
- Real distance: 23910 meter
Results (60s iperf runs):
Fixed coverage class 54 (up to 24300m):
* 21.5 Mbits/sec
Dynack:
* 28.9 Mbits/sec
Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
Diffstat (limited to 'package/kernel/mac80211/patches/ath/557-ath9k-dynack-remove-experimental-tag.patch')
| -rw-r--r-- | package/kernel/mac80211/patches/ath/557-ath9k-dynack-remove-experimental-tag.patch | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/ath/557-ath9k-dynack-remove-experimental-tag.patch b/package/kernel/mac80211/patches/ath/557-ath9k-dynack-remove-experimental-tag.patch new file mode 100644 index 0000000000..2e4cffd1fa --- /dev/null +++ b/package/kernel/mac80211/patches/ath/557-ath9k-dynack-remove-experimental-tag.patch @@ -0,0 +1,22 @@ +From: Lorenzo Bianconi <lorenzo.bianconi@redhat.com> +Date: Fri, 2 Nov 2018 21:49:59 +0100 +Subject: [PATCH] ath9k: dynack: remove 'experimental' tag + +Remove experimental tag from dynack Kconfig entry since it has +been tested on outdoor 25Km links + +Tested-by: Koen Vandeputte <koen.vandeputte@ncentric.com> +Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com> +--- + +--- a/drivers/net/wireless/ath/ath9k/Kconfig ++++ b/drivers/net/wireless/ath/ath9k/Kconfig +@@ -132,7 +132,7 @@ config ATH9K_DFS_CERTIFIED + except increase code size. + + config ATH9K_DYNACK +- bool "Atheros ath9k ACK timeout estimation algorithm (EXPERIMENTAL)" ++ bool "Atheros ath9k ACK timeout estimation algorithm" + depends on ATH9K + default n + ---help--- |