关键词: 异构网络, 小区增强, 干扰协调, 频谱资源分配, 频谱效率

Abstract: The cell range expansion technique in the heterogeneous network reduces the macrocell load while causing the serious cross layer interference. The paper presents a dynamic resource allocation scheme to reduce the interference in the network and improve system spectrum efficiency. This scheme balances the load of two-layer network through setting coefficient and enhances the spectral efficiency by adjusting the spectrum resources dynamically under the circumstance of eliminating the cross layer interference. The simulation results suggest that this scheme compared with the existing schemes effectively reduces the interference of picocells, improves the overall spectrum efficiency of the system, and balances the load of two-layer network while the stability of the macrocell is obtained.

Key words: heterogeneous network, cell range expansion, interference coordination, spectral resource allocation, spectral efficiency