From the Foreword 'To allow the use of several QoS approaches, a unifying view on how different methods can be combined is needed and such a treatment has been missing so far. Jens Schmitt's book closes this gap. In this book, the interworking between heterogeneous network QoS systems is investigated from a fundamental perspective. In order to be able to perform this study, a thorough discussion of some existing QoS systems is given and a general model for network QoS systems is developed. With this solid basis, readers understand the differences between these systems and the difficulties for an interaction among them. Schmitt then identifies the fundamental problems in interworking heterogeneous network QoS systems and develops generic techniques in several dimensions to deal with these issues. Besides these, a further item is the evaluation of strategies allowing to use the generic techniques in an efficient way. This book is timely because it presents and discusses the very important and current field of network QoS. Yet, it is also time-independent since it gives a general model and according approaches which will serve for a longer time than single mechanisms. Using this comprehensive book on heterogeneous network QoS, readers not only acquire an overview of different QoS systems and interworking approaches but also obtain an excellent understanding of QoS in general.' Lars Christian Wolf
