| 2011 | SOFTCOM | SIP proxy high-load detection by continuous analysis of response delay values. | Christoph Egger, Marco Happenhofer, Peter Reichl |
| 2011 | SOFTCOM | Implicit SIP proxy overload detection mechanism based on response behavior. | Marco Happenhofer, Christoph Egger |
| 2010 | MASCOTS | Measurement-Based Analysis of Head-of-Line Blocking for SIP over TCP. | Marco Happenhofer, Peter Reichl |
| 2010 | TridentCom | BIQINI - A Flow-Based QoS Enforcement Architecture for NGN Services. | Christoph Egger, Marco Happenhofer, Joachim Fabini, Peter Reichl |
| 2009 | WEBIST | SHIP - SIP HTTP Interaction Protocol - Proposing a Thin-client Architecture for IMS Applications. | Joachim Zeiss, Ren Gabner, Sandford Bessler, Marco Happenhofer |
| 2009 | WEBIST | The SHIP: A SIP to HTTP Interaction Protocol - Advanced Thin-Client Architecture for IMS Applications. | Joachim Zei, Ren Gabner, Sandford Bessler, Marco Happenhofer |
| 2008 | TridentCom | Generic access network emulation for NGN testbeds. | Joachim Fabini, Peter Reichl, Christoph Egger, Marco Happenhofer, Michael Hirschbichler, Lukas Wallentin |
| 2006 | VTC | Terminal-Centric Location Services for the IP Multimedia Subsystem. | Joachim Fabini, Marco Happenhofer, Rudolf Pailer |