| AP (tx-power -15dbm)(10.0.0.1) |
RSSI |
dbm |
distance |
Txpower |
Uplink Quality |
| Node1(10.0.0.2)(in the corner) |
60 |
-58?? |
12feet |
1mW |
poor (contention failure) |
| Node2(10.0.0.3) |
82 |
-54 |
11feet |
1mW |
Good |
| Node3(10.0.0.6) |
72 |
-60?? |
15feet |
1mW |
Fair |
| Node4(10.0.0.7) |
78 |
-57 |
15feet |
1mW |
Fair |
| 700 |
800 |
900 |
1000K |
1100K |
1200 |
1300 |
1400 |
1500 |
|
| Node 1 |
0.3162 |
0.3576 |
0.4825 |
0.3327 |
0.3496 |
0.1508 |
0.2437 |
0.1985 |
0.3283 |
| Node 2 |
0.7240 |
0.8230 |
0.9272 |
1.0292 |
1.1272 |
1.2344 |
1.3376 |
1.3444 |
1.3377 |
| Node 3 |
0.6014 |
0.6787 |
0.7405 |
0.6889 |
0.7208 |
0.5117 |
0.6040 |
0.6009 |
0.9395 |
| Node 4 |
0.5505 |
0.6543 |
0.7013 |
0.5900 |
0.6077 |
0.8876 |
0.7580 |
0.5745 |
0.7310 |
| total |
2.1921 |
2.5136 |
2.8515 |
2.6408 |
2.8053 |
2.7845 |
2.9433 |
2.7183 |
| 1000 with tc |
1000 tc only node 1 |
6 |
5 |
4 |
3 |
2 |
|
| Node 1 |
0.2752 |
0.2064 |
|||||
| Node 2 |
1.0289 |
1.0290 |
|||||
| Node 3 |
0.9209 |
0.9556 |
|||||
| Node 4 |
0.8720 |
1.0078 |
|||||
| total |
| AP (tx-power -15dbm)(10.0.0.1) |
RSSI |
dbm |
distance |
Txpower |
Uplink Quality |
| Node1(10.0.0.2)(in the corner) |
62 |
-58 |
12feet |
1mW |
poor |
| Node2(10.0.0.3) |
82 |
-54 |
11feet |
1mW |
Good |
| Node3(10.0.0.6) |
72 |
-62 |
15feet |
1mW |
fair |
| Node4(10.0.0.7) |
70 |
-57 |
15feet |
1mW |
Fair |
| offerload 1200K |
Mbps |
* |
|||||
| Node 1 |
0.0456 |
0.2048 |
0.0030 |
0.0979 |
0.2254 |
0.0864 |
0.0715 |
| Node 2 |
1.1784 |
1.1827 |
1.2174 |
1.2168 |
1.2093 |
1.2172 |
1.2377 |
| Node 3 |
0.1622 |
0.7682 |
0.9858 |
1.0055 |
0.7311 |
0.9836 |
1.1100 |
| Node 4 |
0.7150 |
0.7187 |
0.1035 |
0.3487 |
0.2123 |
0.4479 |
0.8826 |
| without scheduling |
|||||||
| with scheduling |
|||||||
| 0.0083 |
0.1098 |
0.1979 |
0.0802 |
0.1002 |
0.1837 |
||
| 1.2343 |
1.1980 |
1.2338 |
1.2357 |
1.2353 |
1.2343 |
||
| 0.5974 |
1.1792 |
0.7699 |
0.8066 |
1.0003 |
0.9143 |
||
| 0.9899 |
1.0478 |
0.3568 |
0.8503 |
0.3229 |
0.2783 |
||
| dbm |
RSSI (%) |
PER |
Expected Throughput(Mbps) |
| >=-45 |
100 |
0 |
4.5 |
| -47 |
96 |
0.01 |
4.4 |
| -50 |
90 |
0.06653 |
4.2 |
| -54 |
81 |
0.1078 |
3.7(*3.8078) |
| 77 |
6-9% |
||
| -57 |
76 |
0.25156 (10-12%) |
3.0 (3.0159*) |
| 74 |
14-23% |
2.5 |
|
| -59 |
72 |
0.34917 (33-40%) |
2.2655* |
| -60 |
70 |
0.48045? |
1.8 |
| -62 |
67 |
0.55 |
1.1 |
| -62 |
66 |
0.6 |
1 |
| -65 |
60 |
0.75556 |
0.4 (0.3409*) |
| -71 |
49 |
0.92994 |
0.1 |
| #para 1: test time #para 2 : enable traffic control or not, 1-enalbe, 0-disable #para 3: file to save rssi value if [ $# -lt 3 ] then echo "$0 : You must give/supply 3 parameters" exit 1 fi ((time_tick=$1*3)) #1 second = 90 mini-tick = 1.1~1.5s total_rssi=0 total_retry=0 total_ack=0 prev_retry=`cat /proc/driver/aironet/eth1/Stats |grep RetryLong |awk '{print $2}'` prev_ack=`cat /proc/driver/aironet/eth1/Stats |grep RxAck |awk '{print $2}'` prev_pl=0 for (( i=0; i<$time_tick ; i++)) do per_rssi=0 for ((j=0;j<30;j++)) do rssi_cur=`cat /proc/driver/aironet/eth1/Status |grep Strength |awk '{print $3}'` per_rssi=`expr $per_rssi + $rssi_cur` # sleep 0.01s done ((total_rssi=$total_rssi+$per_rssi)) ((per_rssi=$per_rssi/30)) cur_retry=`cat /proc/driver/aironet/eth1/Stats |grep RetryLong |awk '{print $2}'` per_retry=`expr $cur_retry - $prev_retry` prev_retry=$cur_retry cur_ack=`cat /proc/driver/aironet/eth1/Stats |grep RxAck |awk '{print $2}'` per_ack=`expr $cur_ack - $prev_ack` prev_ack=$cur_ack total_retry=`expr $total_retry + $per_retry` ((total_ack=$total_ack+$per_ack)) if [ $per_ack -eq 0 ] then pl_value=$prev_pl #cannot use 100 percent loss, use previous value else ((pl_value=100*$per_retry/($per_ack+$per_retry))) fi prev_pl=$pl_value rs_index=`grep -w $per_rssi rtp | awk '{print $2}'` #new discrimination rule if [ $pl_value -gt 50 ] then c=10 # ((c=$rs_index*(100-$pl_value)*(100-$pl_value)/10000)) else ((c=$rs_index*(100-$pl_value)/100)) fi b=kbit c_rate=$c$b if [ $2 -eq 1 ] then tc qdisc del dev eth1 root echo "$per_rssi $pl_value $c_rate" >> $3 tc qdisc add dev eth1 root handle 1: cbq avpkt 1024 bandwidth 11mbit tc class add dev eth1 parent 1: classid 1:1 cbq rate $c_rate \ allot 1500 prio 1 bounded isolated tc filter add dev eth1 parent 1: protocol ip prio 16 u32 \ match ip dst 10.0.0.1 flowid 1:1 fi done ((avg_rssi=$total_rssi/$time_tick/30)) echo "average rssi is $avg_rssi" echo "average retry_count is `expr $total_retry / $time_tick`" echo "average ack_count is `expr $total_ack / $time_tick`" echo "average PER is F: $total_retry and S: $total_ack" if [ $2 -eq 1 ] then tc qdisc del dev eth1 root fi |
| #para 1: test time #para 2 : enable traffic control or not, 1-enalbe, 0-disable #para 3: weight of RSSI-based throughput ,1 to 9 #para 4: weight of PER-based throughout, 9 to 1 #para 5: file to save rssi value #para 6: file to save static rssi and Packet loss ratio # metric about PER correlated throughput # PER<0.5 100k # 0.5-0.6 200k # 0.6-0.7 400K # 0.7-0.8 800K # 0.8-0.9 1600K if [ $# -lt 6 ] then echo "$0 : You must give/supply 6 parameters" exit 1 fi time_tick=$1 #1 timetick = 100 mini-tick = 1.2~1.7s total_rssi=0 total_retry=0 total_ack=0 prev_retry=`cat /proc/driver/aironet/eth1/Stats |grep RetryLong |awk '{print $2}'` prev_ack=`cat /proc/driver/aironet/eth1/Stats |grep RxAck |awk '{print $2}'` cont_index=100 #contention index from 100-1000 (1-10). this value is derived from both PER deviation and RSSI, the minimum contention index is 100, the rate is set to rs_index*100/cont_index for (( i=0; i<$time_tick ; i++)) do #long term statisctics of RSSI long_rssi=0 #first loop for long-term measurement for ((k=0;k<10;k++)) do per_rssi=0 #second loop for short-term measurement and instanteneous adjust for ((j=0;j<10;j++)) do rssi_cur=`cat /proc/driver/aironet/eth1/Status |grep Strength |awk '{print $3}'` per_rssi=`expr $per_rssi + $rssi_cur` # sleep 0.01s done ((total_rssi=$total_rssi+$per_rssi)) ((per_rssi=$per_rssi/10)) ((long_rssi=$long_rssi+$per_rssi)) rs_index=`grep -w $per_rssi rtp | awk '{print $2}'` pl_index=`grep -w $long_rssi rtp | awk '{print $3}'` #new discrimination rule ((rs_index=$rs_index*(10000-pl_index)/100)) #echo "$per_rssi $rs_index" ((c=$rs_index*100/$cont_index)) b=kbit c_rate=$c$b if [ $2 -eq 1 ] then #if [ $i -gt 0 ] #then tc qdisc del dev eth1 root #fi echo "$per_rssi $cont_index $c_rate" >> $6 tc qdisc add dev eth1 root handle 1: cbq avpkt 1024 bandwidth 11mbit tc class add dev eth1 parent 1: classid 1:1 cbq rate $c_rate \ allot 1500 prio 1 bounded isolated tc filter add dev eth1 parent 1: protocol ip prio 16 u32 \ match ip dst 10.0.0.1 flowid 1:1 fi #here, Rate throttle is set and we are going to back for next 10 mini-ticks for a newRSSI upadte and new rate set-up done #here, we have to calculate PER of last 100 mini-tick (1.2~1.5 seconds), ((long_rssi=$long_rssi/10)) cur_retry=`cat /proc/driver/aironet/eth1/Stats |grep RetryLong |awk '{print $2}'` per_retry=`expr $cur_retry - $prev_retry` prev_retry=$cur_retry cur_ack=`cat /proc/driver/aironet/eth1/Stats |grep RxAck |awk '{print $2}'` per_ack=`expr $cur_ack - $prev_ack` prev_ack=$cur_ack total_retry=`expr $total_retry + $per_retry` ((total_ack=$total_ack+$per_ack)) #packet loss index from the table pl_index=`grep -w $long_rssi rtp | awk '{print $3}'` if [ $per_ack -eq 0 ] then pl_value=100 else ((pl_value=100*$per_retry/($per_ack+$per_retry))) fi #!new change---------------------- ((diffe=$pl_value-$pl_index/100)) #------------------------------- if [ $diffe -le 0 ] then diffe=0 else diffe=$diffe*10 #basic contention index, 100 means 10 deviation of pl percent fi #rssi-based adjust (0-100) if [ $long_rssi -le 50 ] then ad_ratio=2000 else ((ad_ratio=2000/($long_rssi-50))) fi ((diffe=$diffe*$ad_ratio/100)) ((cont_index=$diffe+100)) echo "$long_rssi $pl_index $pl_value" >> $5 done ((avg_rssi=$total_rssi/$time_tick/100)) echo "average rssi is $avg_rssi" echo "average retry_count is `expr $total_retry / $time_tick`" echo "average ack_count is `expr $total_ack / $time_tick`" echo "average PER is F: $total_retry and S: $total_ack" if [ $2 -eq 1 ] then tc qdisc del dev eth1 root fi |