Welcome to the Monroe-Recon site!

About the Monroe project

About the Recon project

In the RECON project, we have proposed networking experiments to reveal and reconstruct the network settings and policies applied by network operators in Network, Transport and Application Layers. The reverse engineering approaches developed in RECON aim at giving a vertical view of the largest European Mobile Broadband Networks. In network layer, we proposed a GPS-traceroute measurement to investigate routing policies with special focus on the NAT-box placements, the applied exit routing strategy from different locations and the topology changes of mobile end-hosts. In transport layer, active measurements have been developed to identify how Explicit Congestion Notification (ECN) is supported by the MBB infrastructure considering both UDP and TCP cases. In contrast to existing studies, we focus on the infrastructure support of ECN related fields in both IP and TCP headers and the observation of CE marking. In application layer, operators often apply traffic differentiation — giving better (or worse) performance to certain classes of Internet traffic. To this end, we conducted measurements using the record-replay methodology with a variety of popular applications. In contrast to previous solutions, we also generate an encrypted reference flow to distinguish temporal performance issues caused by the network from the effect of policies like traffic shaping. In addition, more specific experiments have also been carried out with a modified YouTube client to determine quality experienced by YouTube end-users in MBB environment.