The seventh edition of the International Conference on Wired/Wireless Int- net Communications (WWIC) was organized by the University of Twente in May 2009. Since the ?rst event in 2002, WWIC has been established as a highly selectiveconferencefocussingonthe rapidlydeveloping?eldof wirelessnetwo- ing, and providing an international forum for the presentation and discussion of cutting-edge research in the ?eld. The WWIC 2009 call for papers attracted 39 submissions from 20 countries, which were subject to thorough review by the Technical Program Committee members and additional experts. The selection process resulted in the acc- tance of 13 papers, organized into 4 technical sessions. The major themes of WWIC this year were energy e?ciency, security, reliability, and routing p- tocols in wireless sensor and ad hoc networks as well as handover and mobility managementin heterogeneousenvironments. We aregratefulto MatthiasGro- glauser (Nokia Research Center, Finland, and EPFL Lausanne, Switzerland), who accepted our invitation to give the WWIC 2009 keynote speech.Further, we would like to thank Hans Appel (Sun Microsystems, The Netherlands), and Remco Litjens (TNO ICT, The Netherlands) for giving invited presentations at this year's event. In addition to the main technical program, the third ERCIM workshop on eMobility took place on the ?rst day of WWIC 2009. We thank the authors for choosing WWIC 2009 as the conference to submit their results to.