Quality of Service in Heterogeneous Networks, 6Th International Icst Conference on Heterogeneous Networking for Quality, Reliability, Security and Robustness, Qshine 2009 and 3Rd International Workshop on Advanced Architectures and Algorithms for Internet Delivery and Applications, Aaa-Idea 2009, Las Palmas, Gran Canaria, Spain, November 23-25, 2009, Proceedings