TABLE OF CONTENTS In this chapter, we analyze and compare the Erlang capacity of multiaccess systems supporting several different radio access technologies according to two different operation methods separate and common operation methods by simultaneously considering the link capacity limit per sector as well as CE limit in BS. In a numerical example with GSM/EDGE-like and WCDMA-like subsystems, it is shown that we can get up to 60% Erlang capacity improvement through the common operation method when using a near optimum so-called service-based user assignment scheme, and there is no CE limit in BS. Even with the worst-case assignment scheme, we can still get about 15% capacity improvement over the separate operation method. However, the limited number of CEs in the BS reduces the capacity gains of multiaccess systems with the common operation over the separate operation. In order to fully extract the Erlang capacity of multiaccess system, an efficient method is needed to select the proper number of CEs in the BS while minimizing the cost of equipment.
Future mobile networks will consist of several distinct radio access technologies, such as WCDMA or GSM/EDGE, where each radio access technology is denoted as a subsystem. Such future wireless networks, which demand the utilization of the cooperative use of a multitude of subsystems, are named multiaccess systems. In the first phase of such multiaccess systems, the RRM of subsystems may be performed in a separate way to improve the performance of individual systems independently, mainly because the subsystems have no information of the situation...
