My understanding is that the reported bit rates are dependent not just on signal quality but also the quantity of traffic passing through each side at a given interval. So, if the RX chain isn't pulling in as much as traffic as the TX chain is sending out, then its rate will get scaled down.
Can you verify the asymmetric Rx/TX throughput reported by iw using iperf or even with wget? On Wed, Feb 20, 2013 at 8:39 PM, HeXiLeD <[email protected]> wrote: > I have a few routers that i have been using in a adhoc mesh network that > have been presenting some results that i would like to understand better. > > Some of these routers had only one antenna; others had 2. they all got > modified ro be able to use external omni directional antennas. > > The routers with just 2 antennas kept one original antenna and the other > was upgraded to the external. > > Right now are showing some values that have made me questioning which > antenna is actually being used. > > iw dev wlan0-1 station dump > > Station (on wlan0-1) > inactive time: 140 ms > rx bytes: 5916030 > rx packets: 84079 > tx bytes: 6406980 > tx packets: 51827 > tx retries: 59838 > tx failed: 2130 > signal: -77 [-80, -79] dBm > signal avg: -76 [-79, -78] dBm > tx bitrate: 19.5 MBit/s MCS 2 > rx bitrate: 1.0 MBit/s > authorized: yes > authenticated: yes > preamble: long > WMM/WME: yes > MFP: no > TDLS peer: no > > In all these models of the 2 antenna routers i get the TX value always > higher than the RX and the RX at 1 mbit. > > /etc/config/wireless > > config wifi-device radio0 > option type mac80211 > option channel 11 > option phy phy0 > option hwmode 11ng > option country US > option noscan 1 > option diversity 0 > option htmode HT40- > list ht_capab SHORT-GI-40 > list ht_capab TX-STBC > list ht_capab RX-STBC1 > list ht_capab DSSS_CCK-40 > option beacon_int 1000 > option txpower 20 > option disabled 0 > option distance 2000 > > Since i have option diversity 0 and no specification for which antenna > the router should use and in this case it should use the right side > antenna; could this be the cause of very low values for rx bitrate. > > How can i improve or solve this situation ? > > Also in the case of 3 antenna routers such as the t-plink wr1043nd which > has 3 antennas; how does one selects the middle antenna ? > > > _______________________________________________ > openwrt-users mailing list > [email protected] > https://lists.openwrt.org/mailman/listinfo/openwrt-users > -- Ben West http://gowasabi.net [email protected] 314-246-9434
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