基于覆盖范围需求的LTE下行资源分配方式

LTE Downlink Resource Allocation Based on Coverage Needs

为了提高TD-LTE的网络规划质量,根据LTE的技术特征,提出一种基于覆盖范围需求的下行资源分配方式。该方法通过对控制信道的相关参数选择使得控制信道的覆盖范围与相应的业务信道趋于一致,并根据控制信道的覆盖受限范围推导出不同速率业务的频域资源块数目可取范围。理论和仿真结果表明,这种新的资源分配方案可以减少不必要的干扰和功率浪费,与现有频域资源分配方法没有考虑到网络规划的因素相比,该方法配合下行不同业务的资源分配算法则更适合于TD-LTE的资源分配,极大地提升了小区边缘的覆盖质量。

In order to improve TD-LTE network planning quality, according to the technical characteristics of LTE, a way of the downlink resource allocation based on the coverage needs is proposed. In this method, the selection of relevant parameters of the control channel makes the coverage of it and the traffic channel as close as possible. Limited scope of coverage under the control channel is derived in rational range of resource block in frequency domain of different traffic. Theoretical and simulation results show that the new resource allocation scheme can reduce unnecessary interference and power waste, resource allocation methods of frequency domain with existing do not take into account the factors of network planning, and this method proposed is more suitable for TD-LTE distribution of resources, greatly enhancing the cell edge coverage quality.