This book focuses on the detailed description of the UMTS core network architecture with Rel. 4 and particularly with Rel. 5. Most importantly, the book ties a detailed analysis of the new call control and mobility management protocols like SIP or BICC into the presentation of the all-IP core network architecture in Rel. 4 and 5. This approach allows the student an easy comprehension of the necessity and advantages of the new network architecture in UMTS Rel. 4 and 5 as well as an easy understanding of the new protocol procedures with SIP.weiterlesen