NETWORKING 2006. Networking Technologies, Services, Protocols; Performance of Computer and Communication Networks; Mobile and Wireless Communications Systems : 5th International IFIP-TC6 Networking Conference, Coimbra, Portugal, May 15-19, 2006, Proceedings - Fernando Boavida, Thomas Plagemann, Burkhard Stiller, Cedric Westphal, Edmundo Monteiro ((Lecture Notes in Computer Science))