Systems Communications 2005 covers advanced topics on wireless complemented by special topics on high speed networks, multimedia communications systems, and sensor networks. The program is rich and dense, covering a variety of topics. Wireless papers are oriented towards ad hoc networks, QoS, mobility, and monitoring. Authors on multimedia systems focus on security, design techniques, QoS assessment, and applications. Papers on high speed networks cover aspects related to optimization, routing, multicast, monitoring, and QoS, and sensor networks presents results on architecture, energy optimization, sensor metrics, security, routing, and coordination.