Research Of Radio Resource Management In Mobile Communications Systems And Implementation Of Future Software

The evolution of analog cellular mobile communications systems into digital second and third generation systems, triggered by an ever increasing need for high mobile user capacity and new services, has fueled the interest in finding more effcient Radio Resource Management (RRM) schemes of managing the resources available to the system. The most important of those resources are radio spectrum and power. Due to the sparsity of radio spectrum and power in mobile communications systems, it is impossible to increase bandwidth of systems and transmitted power of mobiles unboundedly from the point of view of technology and economy. Consequently, there are higher requirements for spectrum utility and transmitted power constraint.In the context of FDMA/TDMA mobile communications systems, Dynamic Channel Assignment (DCA) has been a topic of intense research for over a decade. DCA allows for more effcient use of the available spectrum and eliminates the burden of costly frequency planning. Handset's power, on the other hand, is both a scarce resource at mobile stations and a capacity constraining factor in systems inherently limited by interference. This, in turn, has led to the development of a variety of Power Control (PC) schemes which try to minimize the amount of interference in the system and the power consumption at the mobiles, enhance system capacity and prolong the life of batteries. Despite the intense activity in both the DCA and the PC arenas, little has been done aimed at trying to effectively integrate them with base assignment, call admission control and handover control. Based on research results of predecessors, we consider all five aspects and investigate integrated RRM strategy. Moreover, Game Theory is introduced into PC of this strategy. In Chapter 4, a large-scale computer simulation is adopted to evaluate and compare system performances of different channel assignment schemes under fixed transmitted power and two PC algorithms under FCA.Future Technology for Universal Radio Environment (FuTURE) research project is the important one of China 863 HighTech Project's communications topic. In order to following the development trend of future ten years in the field of wireless communications, FuTURE project takes aim at researching air interface technologies of Beyond 3G or 4G cellular mobile systems, establishing demo system of its key technologies, and supporting new services of future wireless communications. In GMC-TDD-xDMA demo system, the FuTURE resource management software is based on VxWorks operating system and Motorola's PPC8260 microprocessor, and Xilinx's VirtexII FPGA. It is responsible for demonstrating wireless multimedia traffics, controlling and managing all the system boards, and termly reporting status information of the system. The FuTURE software mostly includes Ethernet packet handling, PPP protocol, MAC, and controlling/monitoring tasks.