CAJ | 학술논문

异构网络被LTE-A系统视为一种提升单位区域频谱效率的关键技术而得到广泛关注。然而，异构网络会带来严重的小区间干扰，小区间干扰协调因此成为3GPP标准化进程研究的重点。首先总结了异构网络及小区间干扰协调技术，然后介绍了目前3GPP中讨论的小区覆盖扩展（CRE：CellRange Extension）和基于几乎空白子帧（ABS：Almost Blank Subframe）的时域小区间干扰协调技术。最后，基于动态系统级仿真平台，评估了CRE和ABS技术方案系统性能。
이구망락피LTE-A계통시위일충제승단위구역빈보효솔적관건기술이득도엄범관주。연이，이구망락회대래엄중적소구간간우，소구간간우협조인차성위3GPP표준화진정연구적중점。수선총결료이구망락급소구간간우협조기술，연후개소료목전3GPP중토론적소구복개확전（CRE：CellRange Extension）화기우궤호공백자정（ABS：Almost Blank Subframe）적시역소구간간우협조기술。최후，기우동태계통급방진평태，평고료CRE화ABS기술방안계통성능。
Inter-cell Interference Coordination has become a key work item in the current process of standardization in the 3rd Generation Partnership Project （3GPP）. In this paper, we give a summariza- tion of heterogeneous networks and inter-cell inter- ference coordination technologies. Then we intro- duce cell range extension （CRE） and almost blank subframe （ABS） time domain inter-cell interference coordination technology, both of which are under discussion in 3GPP currently. In the end, we evalu- ate influence of CRE and ABS technical proposal on system performance on the basis of dynamic sys- tem level simulation platform.