hello all,
I'm trying to use the 802.11b as phy instead of the default 802.11a in
an infrastructured wireless network. in order to do that, I just call
YansWifiPhyHelper::SetStandard("Standard", StringValue("802.11b")) on
the relevant object.
unfortunately, nothing appears to work at all. looking at the pcap
traces, associations to the AP are very problematic and with lots of
retransmissions (though associations are at last successful), and
packets are not delivered at all, since nobody answers the ARP
requests of the sending node. I found the same behavior in my own code
and in the third.cc example as well (once 802.11b is set up).
any clues on why this happens? I couldn't find any. if that can help,
here is how NqstaWifiMac in third.cc reacts with 802.11a:
2s [mac=00:00:00:00:00:09] NqstaWifiMac:Enqueue(0x807ea30, 0x808c390,
ff:ff:ff:ff:ff:ff)
Sent 1024 bytes to 10.1.2.4
2.00032s [mac=00:00:00:00:00:07] NqstaWifiMac:Receive(0x806c148,
0x808c408, 0xbf9458c0)
2.00032s [mac=00:00:00:00:00:07] NqstaWifiMac:ForwardUp(0x806c148,
0x808c408, 00:00:00:00:00:09, ff:ff:ff:ff:ff:ff)
2.00032s [mac=00:00:00:00:00:08] NqstaWifiMac:Receive(0x807dee0,
0x8089b18, 0xbf9458c0)
2.00032s [mac=00:00:00:00:00:08] NqstaWifiMac:ForwardUp(0x807dee0,
0x8089b18, 00:00:00:00:00:09, ff:ff:ff:ff:ff:ff)
2.00032s [mac=00:00:00:00:00:09] NqstaWifiMac:Receive(0x807ea30,
0x808c7c8, 0xbf9458c0)
2.00032s [mac=00:00:00:00:00:09] packet sent by us.
2.0006s [mac=00:00:00:00:00:09] NqstaWifiMac:Receive(0x807ea30,
0x808c390, 0xbf9458c0)
2.0006s [mac=00:00:00:00:00:09] NqstaWifiMac:ForwardUp(0x807ea30,
0x808c390, 00:00:00:00:00:0a, 00:00:00:00:00:09)
2.0006s [mac=00:00:00:00:00:09] NqstaWifiMac:Enqueue(0x807ea30,
0x808b940, 00:00:00:00:00:0a)
Received 1024 bytes from 10.1.3.3
... and so on ...
and this is how it works with 802.11b:
2s [mac=00:00:00:00:00:09] NqstaWifiMac:Enqueue(0x807ea20, 0x808b878,
ff:ff:ff:ff:ff:ff)
Sent 1024 bytes to 10.1.2.4
2.50065s [mac=00:00:00:00:00:08] NqstaWifiMac:Receive(0x807dee0,
0x808b8d8, 0xbf9dc960)
2.50065s [mac=00:00:00:00:00:08] NqstaWifiMac:RestartBeaconWatchdog
(0x807dee0, 24995840000ns)
2.50065s [mac=00:00:00:00:00:08] NqstaWifiMac:SetBssid(0x807dee0,
00:00:00:00:00:0a)
2.50065s [mac=00:00:00:00:00:07] NqstaWifiMac:Receive(0x806c1a8,
0x808a128, 0xbf9dc960)
2.50065s [mac=00:00:00:00:00:07] NqstaWifiMac:RestartBeaconWatchdog
(0x806c1a8, 24995840000ns)
2.50065s [mac=00:00:00:00:00:07] NqstaWifiMac:SetBssid(0x806c1a8,
00:00:00:00:00:0a)
2.50065s [mac=00:00:00:00:00:09] NqstaWifiMac:Receive(0x807ea20,
0x808d768, 0xbf9dc960)
2.50065s [mac=00:00:00:00:00:09] NqstaWifiMac:RestartBeaconWatchdog
(0x807ea20, 24995840000ns)
2.50065s [mac=00:00:00:00:00:09] NqstaWifiMac:SetBssid(0x807ea20,
00:00:00:00:00:0a)
... and so on ...
thanks for any suggestion you may have.
