This book presents a series of research papers arising from MSc/MRes Network Systems Engineering and MSc/MRes Communications Engineering & Signal Processing research projects undertaken at the University of Plymouth. These one year masters courses include a significant period of full-time project activity, and students are assessed on the basis of an MSc or MRes thesis, plus an accompanying research paper. The publications in this volume are based upon research projects that were undertaken during the 2002/03 academic year. A total of 19 papers are presented, covering many aspects of modern networking and communication technology, including security, mobility, coding schemes and quality measurement.