This book constitutes the thoroughly refereed postproceedings of the second international joint workshops on Wireless and Mobility and on New Trends in Network Architectures and Services organized by the European Network of Excellence on Next Generation Internet, EURO-NGI 2005, held in the Villa Vigoni, Loveno di Menaggio, Como, Italy, in July 2005.

The 19 revised full research papers presented together with 1 invited talk were carefully selected during two rounds of reviewing and improvement. The papers are organized in topical sections on wireless solutions (from from wireless LANs to ad hoc and sensor networks), cellular systems (models and algorithms), QoS support in next generation networks, and peer to peer architectures and algorithms.