I have been having problems connecting with my Wi-Fi. It is weird, the ping times to the router (<30 feet away) seem to surge, often getting over 10 seconds before slowly coming back down. You can see the trend below. I'm on a MacBook Pro and have done the normal stuff (reset the PRAM and SMC, changed wireless channels, etc.). It happens across different routers, so I think it must be my laptop, but I don't know what it could be.

The RSSI value hovers around -57, but I've seen the transmit rate flip between 0, 48 and 54. The signal strength is ~60% with 9% noise. Currently, there are 17 other wireless networks in range, but only one in the same channel.

1 - How can I figure out what's going on?
2 - How can I correct the situation?

PING 192.168.1.1 (192.168.1.1): 56 data bytes
64 bytes from 192.168.1.1: icmp_seq=0 ttl=254 time=781.107 ms  
64 bytes from 192.168.1.1: icmp_seq=1 ttl=254 time=681.551 ms  
64 bytes from 192.168.1.1: icmp_seq=2 ttl=254 time=610.001 ms  
64 bytes from 192.168.1.1: icmp_seq=3 ttl=254 time=544.915 ms  
64 bytes from 192.168.1.1: icmp_seq=4 ttl=254 time=547.622 ms  
64 bytes from 192.168.1.1: icmp_seq=5 ttl=254 time=468.914 ms  
64 bytes from 192.168.1.1: icmp_seq=6 ttl=254 time=237.368 ms  
64 bytes from 192.168.1.1: icmp_seq=7 ttl=254 time=229.902 ms  
64 bytes from 192.168.1.1: icmp_seq=8 ttl=254 time=11754.151 ms  
64 bytes from 192.168.1.1: icmp_seq=9 ttl=254 time=10753.943 ms  
64 bytes from 192.168.1.1: icmp_seq=10 ttl=254 time=9754.428 ms  
64 bytes from 192.168.1.1: icmp_seq=11 ttl=254 time=8754.199 ms  
64 bytes from 192.168.1.1: icmp_seq=12 ttl=254 time=7754.138 ms  
64 bytes from 192.168.1.1: icmp_seq=13 ttl=254 time=6754.159 ms  
64 bytes from 192.168.1.1: icmp_seq=14 ttl=254 time=5753.991 ms  
64 bytes from 192.168.1.1: icmp_seq=15 ttl=254 time=4754.068 ms  
64 bytes from 192.168.1.1: icmp_seq=16 ttl=254 time=3753.930 ms  
64 bytes from 192.168.1.1: icmp_seq=17 ttl=254 time=2753.768 ms  
64 bytes from 192.168.1.1: icmp_seq=18 ttl=254 time=1753.866 ms  
64 bytes from 192.168.1.1: icmp_seq=19 ttl=254 time=753.592 ms  
64 bytes from 192.168.1.1: icmp_seq=20 ttl=254 time=517.315 ms  
64 bytes from 192.168.1.1: icmp_seq=37 ttl=254 time=1.315 ms  
64 bytes from 192.168.1.1: icmp_seq=38 ttl=254 time=1.035 ms  
64 bytes from 192.168.1.1: icmp_seq=39 ttl=254 time=4.597 ms  
64 bytes from 192.168.1.1: icmp_seq=21 ttl=254 time=18010.681 ms  
64 bytes from 192.168.1.1: icmp_seq=22 ttl=254 time=17010.449 ms  
64 bytes from 192.168.1.1: icmp_seq=23 ttl=254 time=16010.430 ms  
64 bytes from 192.168.1.1: icmp_seq=24 ttl=254 time=15010.540 ms  
64 bytes from 192.168.1.1: icmp_seq=25 ttl=254 time=14010.450 ms  
64 bytes from 192.168.1.1: icmp_seq=26 ttl=254 time=13010.175 ms  
64 bytes from 192.168.1.1: icmp_seq=27 ttl=254 time=12010.282 ms  
64 bytes from 192.168.1.1: icmp_seq=28 ttl=254 time=11010.265 ms  
64 bytes from 192.168.1.1: icmp_seq=29 ttl=254 time=10010.285 ms  
64 bytes from 192.168.1.1: icmp_seq=30 ttl=254 time=9010.235 ms  
64 bytes from 192.168.1.1: icmp_seq=31 ttl=254 time=8010.399 ms  
64 bytes from 192.168.1.1: icmp_seq=32 ttl=254 time=7010.144 ms  
64 bytes from 192.168.1.1: icmp_seq=33 ttl=254 time=6010.113 ms  
64 bytes from 192.168.1.1: icmp_seq=34 ttl=254 time=5010.025 ms  
64 bytes from 192.168.1.1: icmp_seq=35 ttl=254 time=4009.966 ms  
64 bytes from 192.168.1.1: icmp_seq=36 ttl=254 time=3009.825 ms  
64 bytes from 192.168.1.1: icmp_seq=40 ttl=254 time=16000.676 ms  
64 bytes from 192.168.1.1: icmp_seq=41 ttl=254 time=15000.477 ms  
64 bytes from 192.168.1.1: icmp_seq=42 ttl=254 time=14000.388 ms  
64 bytes from 192.168.1.1: icmp_seq=43 ttl=254 time=13000.549 ms  
64 bytes from 192.168.1.1: icmp_seq=44 ttl=254 time=12000.469 ms  
64 bytes from 192.168.1.1: icmp_seq=45 ttl=254 time=11000.332 ms  
64 bytes from 192.168.1.1: icmp_seq=46 ttl=254 time=10000.339 ms  
64 bytes from 192.168.1.1: icmp_seq=47 ttl=254 time=9000.338 ms  
64 bytes from 192.168.1.1: icmp_seq=48 ttl=254 time=8000.198 ms  
64 bytes from 192.168.1.1: icmp_seq=49 ttl=254 time=7000.388 ms  
64 bytes from 192.168.1.1: icmp_seq=50 ttl=254 time=6000.217 ms  
64 bytes from 192.168.1.1: icmp_seq=51 ttl=254 time=5000.084 ms  
64 bytes from 192.168.1.1: icmp_seq=52 ttl=254 time=3999.920 ms  
64 bytes from 192.168.1.1: icmp_seq=53 ttl=254 time=3000.010 ms  
64 bytes from 192.168.1.1: icmp_seq=54 ttl=254 time=1999.832 ms  
64 bytes from 192.168.1.1: icmp_seq=55 ttl=254 time=1000.072 ms  
64 bytes from 192.168.1.1: icmp_seq=58 ttl=254 time=1.125 ms  
64 bytes from 192.168.1.1: icmp_seq=59 ttl=254 time=1.070 ms  
64 bytes from 192.168.1.1: icmp_seq=60 ttl=254 time=2.515 ms