Dynamic Channel Assignment Algorithms In Radio Resource Management Of TD-SCDMA System

The TD-SCDMA Mobile Communication System as the first Chinese self-owned intellectual property rights International Telecom Standard; it adopts smart antenna, joint detection and synchronous CDMA and other advanced technologies, and solves various problems in the application of these technologies, giving the system higher performance and frequency utilization efficiency. It gains a universal attention in the international organization. TD-SCDMA as a mobile system with characterization of CDMA, reliable and efficient radio resource management strategies and methods are very important guarantee of its performance and capacity. Compared with FDD system, it adopts smart antenna, multi-detection, synchronous and special frame structure in physical layer. It needs a maximum enhancement of system resource utilization and also the harmonization of all kinds of resources during the allocation and management of these system radio resources. Various radio resources of TD-SCDMA system including code, frequency, timeslot, power and space cause more complicated radio resource management strategy and the dynamic channel assignment algorithms is the core of it. The TD-SCDMA systems add one more time dimension, it can flexible adapt its up/down link switching point according to different traffic proportion, so it brings a big challenge to dynamic channel assignment algorithms.