动态信道分配在TD-SCDMA系统中的应用研究

Application and study of dynamic channel allocation in TD-SCDMA system

针对TD-SCDMA系统,充分结合TD-SCDMA系统的关键技术、资源特点、业务特点和干扰特点,寻求适用于该系统(包括频域载频、时域时隙、码域码道和空域位置)的最优组合动态信道分配策略,为了比较该策略下不同动态信道分配(DCA)算法性能,提出了4种DCA算法,并结合实际情况建立仿真模型,通过正确设置仿真参数,进行系统级仿真,以确定各种动态信道分配算法,各种仿真参数设置对系统呼阻率的影响。仿真结果表明,TD-SC- DMA系统是下行受限的系统,其上、下行干扰门限理想值分别为1.5和3.1左右。

Aiming at the TD-SCDMA system and associating with its key technologies, resources, services and interferences, the optimum dynamic channel allocation （DCA） strategy about the frequency, the time slot, the code and the position beam is searched. For comparing the performance of different DCA arithmetic, four DCA arithmetics are proposed~ moreover, the practical simulative models are built and the practical simulative parameters are set. Through the simulation, some conclusions about the different DCA arithmetic and simulative parameters to the system blocking probability can be gained. The simulation results indicate that TD-SCDMA system is a DL-limited system, and its interferences thresholds in up and down link are about 1.5 and 3.1 respectively.