Towards ‘ALL IP’ and Some Concluding Remarks
Alex Brand, Hamid Aghvami · 2002
Chapter 11: introduces architectural enhancements to the UMTS packet-switched core network for the support of real-time IP-based traffic, the new IP multimedia subsystem (IMS), and enhancements to the GPRS/EDGE radio access network - all these enhancements can be viewed as first steps towards ‘all IP’ discusses challenges relating to the support of real-time IP services over cellular air interfaces and outlines possible solutions on how to overcome problems such as the spectral inefficiency associated with standard voice over IP over radio reviews enhancements to the GPRS/EDGE air interface, enabling it to support real-time packet-data services synthesises the numerous findings on multiplexing efficiency and access control, two key topics dealt with extensively throughout the book, for TDMA, hybrid CDMA/TDMA and CDMA-based cellular communication systems