TD-LTE系统动态资源分配算法研究

动态资源分配算法能够有效提高频谱利用效率、系统容量以及减少发射功率。在TD-LTE通信系统中,下行链路采用了OFDMA(orthogonal frequency division multiple access)技术,动态资源分配问题常建模为在非线性限制条件下求解非线性目标函数的最优化问题。针对无约束条件迭代算法、速率自适应算法与边界自适应算法分配特点,分析了动态资源分配算法如何满足TD-LTE(time division-long term evolution)中多媒体业务不同QoS需求。对3种主流算法复杂度、容量、发射功率等技术指标进行分析比较。同时讨论了如何使算法具有低复杂度并能使网络达到良好技术指标,以及将资源块与功率结合分配的解决思路。为TD-LTE系统的动态资源分配算法研究提供了可行方案。

Dynamic resource allocation algorithm in TD-LTE communication system

The dynamic resource allocation algorithm can improve spectrum utilization, system capacity, and reduce the transmitting power efficiently in radio communication system. OFDMA(orthogonal frequency division multiple access) is adopted in downlink in TD-LTE communication system, and dynamic resource allocation problem is always considered as a non-linear optimization model with non-linear restrictions. The paper aims at the characters of iterative allocation algorithm(no constraints) , rate adaptive algorithm and margin adaptive algorithm. And it compares the algorithm complexity, capacity as well as power in three algorithms. It also discusses how to adopt algorithm to satisfy QoS requirement of different multimedia services and achieve better performance, how to allocate the carriers and power jointly. Finally it proposes the feasible scheme for research of dynamic resource allocation.