TABLE OF CONTENTS With today's growing demands for multimedia services and high degree of user mobility, RRM plays a important role in future CDMA systems to efficiently utilize limited radio resources and to provide more mobile users with guaranteed QoS anywhere at any time.
Further, the performance of a system with given physical resource (e.g., given bandwidth of radio spectrum) heavily depends on RRM scheme. Even though the effectiveness and efficiency of the RRM are affected by system characteristics at the physical, link, and network layers, the major objective of RRM is to enhance the capacity (i.e., the maximum number of users or the throughput that can be supported in a given band for a given QoS).
Major radio resource management schemes can be divided into CAC and resource allocation for ongoing calls [1] [2] [3].
CAC involves the control of both new calls and handoff calls. A new call is a call that originates within a cell and that requests access to the cellular system. A handoff call is a call that originated in one cell but requires and requests resources in another cell. At the network layer, CAC can decide whether a new or handoff connection should be admitted into the system. Admitting more connections than the capacity of lower layers can handle will result in network congestion and the inability to guarantee QoS performance. On the other hand, admitting fewer connections than the capacity of lower layers will underutilize the system resources.
Resource allocation for ongoing calls is...
