UCSE CSE wireless traces
This is the 24 hour traces on Jan 11, 2007 using the
Jigsaw monitoring testbed in the UCSD CSE building.
The traces are divided into two parts:
The timestamps of both traces are synchronized (i.e. based on the same clock). The precision is ~10us.
- Wired: the tcpdump trace at the gateway router that interfaces the
campus giga-ether network and the CSE wireless VLAN. The format is
gzipped tcpdump pcap.
- Wireless: the (merged) jigsaw traces collected using
192 sniffers in UCSD CSE building. The file is a series of jcap_hdr packets like the pcap_pkthdr packet
format. We created our own header simply to save spaces.
The traces are sanitized. The last 3 octest of MAC addresses except
0:0:0 are anonymized but the OUIs are preserved. All IP addresses in
IP header or payload are
anonymized as well except the UCSD wireless subnet prefix (128.54.42/16,
22.214.171.124/16) and private addresses. We do not preserv any other IP
prefixes. Everything beyond TCP, UDP, and DHCP header is removed. Also
we do not recompute the IP/TCP checksums.
Our CSE wireless network has 40 APs. Their locations are in labels.txt
and .png files.
Please be careful that the wired packet and the wireles packets are not 1-to-1 match:
- Every wired packet may have many multiple 802.11 retransmissions.
- APs only forward 802.11 data frames. Management, control, NULL frames only exist in 802.11 network.
- The sniffers may pick up non-CSE AP signals. Similarly, the sniffers may miss CSE packets.
- The wired gateway forwards broadcast traffic among other two nearby bulidings wireless VLAN.
The analysis is published in our SIGCOMM 2007 paper.