Capacity enhancement approaches are being intensively studied in the past few years to address the soaring capacity demands. The network densif ication technology is recognized as one promising solution. However,the u...Capacity enhancement approaches are being intensively studied in the past few years to address the soaring capacity demands. The network densif ication technology is recognized as one promising solution. However,the ultra-dense network scheme suffers from severe interference and frequent handovers,which degrade the system performance significantly. In this paper,a virtual sectorization system leveraging a C-plane(control signaling plane) and U-plane(user data plane) split scheme is proposed to overcome these two fundamental problems. Besides,a well-designed fi eld trial is conducted to evaluate its performance. The results show that the interference can be avoided,which leads to a tremendous increase in system capacity. In addition,the number of handovers is also greatly decreased. Thus,the trial results verify the huge potential of the C-plane and U-plane split scheme for system capacity and user experience enhancements.展开更多
基于控制/用户平面分离的异构网络架构是5G中的一种重要组网方式。微基站的密集部署引发了巨大的能量消耗问题从而无法保障用户的高质量服务(quality of service,QoS)。针对此问题,基于具有最小距离约束特性的硬核点过程(hard-core poin...基于控制/用户平面分离的异构网络架构是5G中的一种重要组网方式。微基站的密集部署引发了巨大的能量消耗问题从而无法保障用户的高质量服务(quality of service,QoS)。针对此问题,基于具有最小距离约束特性的硬核点过程(hard-core point process,HCPP),研究了控制/用户平面分离网络架构中能量效率的优化方法。通过联合优化网络频谱分配比、基站的密度和基站配备的天线数量,设计了最小化基站平均能耗的优化问题。由于问题是非凸的,进一步为能量效率优化问题提出了低复杂度的迭代算法,当算法迭代直至收敛可得到天线数和网络频谱分配比的最优解,最终实现基站能耗的最小化。仿真结果表明,该算法在控制/用户平面分离网络架构下有效地降低了基站的平均功耗并提升了系统能效。展开更多
基金supported by the National Science and Technology Major Project of China (No. 2013ZX03001018)
文摘Capacity enhancement approaches are being intensively studied in the past few years to address the soaring capacity demands. The network densif ication technology is recognized as one promising solution. However,the ultra-dense network scheme suffers from severe interference and frequent handovers,which degrade the system performance significantly. In this paper,a virtual sectorization system leveraging a C-plane(control signaling plane) and U-plane(user data plane) split scheme is proposed to overcome these two fundamental problems. Besides,a well-designed fi eld trial is conducted to evaluate its performance. The results show that the interference can be avoided,which leads to a tremendous increase in system capacity. In addition,the number of handovers is also greatly decreased. Thus,the trial results verify the huge potential of the C-plane and U-plane split scheme for system capacity and user experience enhancements.
文摘基于控制/用户平面分离的异构网络架构是5G中的一种重要组网方式。微基站的密集部署引发了巨大的能量消耗问题从而无法保障用户的高质量服务(quality of service,QoS)。针对此问题,基于具有最小距离约束特性的硬核点过程(hard-core point process,HCPP),研究了控制/用户平面分离网络架构中能量效率的优化方法。通过联合优化网络频谱分配比、基站的密度和基站配备的天线数量,设计了最小化基站平均能耗的优化问题。由于问题是非凸的,进一步为能量效率优化问题提出了低复杂度的迭代算法,当算法迭代直至收敛可得到天线数和网络频谱分配比的最优解,最终实现基站能耗的最小化。仿真结果表明,该算法在控制/用户平面分离网络架构下有效地降低了基站的平均功耗并提升了系统能效。
