基于非正交多址异构网的下行链路干扰协调优化技术.

In order to improve the average throughput performance of edge users of heterogeneous networks, an optimization scheme of downlink interference coordination in heterogeneous cellular network based on non-orthogonal multiple access (NOMA) was proposed. Cell range expansion (CRE) and almost blank subframe (ABS) technology were applied to inter-cell interference coordination and the improved quantum-inspired evolutionary algorithm (IQEA) was used to realize the joint optimization scheme of adaptive CRE and ABS. The simulation results show that NOMA grouping can effectively improve the performance of edge users in heterogeneous networks. Compared with the scheme without interference coordination, the average throughput of edge users of the traditional scheme with non-adaptive interference coordination and the proposed optimization scheme with adaptive interference coordination is increased by 4.93 dB and 5.48 dB, respectively. The average throughput of network users is increased by 0.96 dB and 1.01 dB, respectively, and the logarithmic utility sum of network users is increased by 0.13 dB and 0.14 dB, respectively. [ABSTRACT FROM AUTHOR]