时频双聚合技术用于SA网络架构,在载波聚合技术基础上,通过较低频的2.1 GHz FDD载波来辅助较高频段的3.5 GHz TDD载波来实现上行覆盖增强,同时下行容量也得到提升.FDD NR和TDD NR载波深度协同,支持轮发及并发模式,使得频谱资源利用率最大化,具备多种高低频融合手段能够灵活适配多种组网场景,满足终端差异化网络需求.

介绍了"覆盖率"的传统分析方法和MDT技术的演进,总结了MDT在NSA无线网络覆盖评估中的方法和优缺点.针对地理化后"覆盖率"失真的问题,提出一种基于地图图像识别的覆盖率修正方法,使覆盖率指标能更准确地反映网络覆盖实际情况.

The intelligent detection of network coverage problems based on the clustering algorithm can automatically, quickly, and accurately locate network coverage problems by analyzing the running data of the existing network, ensuring continuous and high-quality communication services for users. Dynamic AP clustering and DBSCAN clustering algorithms are introduced to analyze MDT data, automatically locate coverage problems, and implement geographic aggregation, reducing labor costs and improving network efficiency.

伴随网络业务逻辑场景复杂化和深入化,用户对网络质量提出了更高更精细化的要求,因此移动核心网优化越来越受关注.而移动核心网优化不同于无线优化,重点解决业务逻辑的深层次的问题.因此,基于典型场景的优化实例,核心网优化的工作思路和优化方法的重点是挖掘深层次的网络和业务逻辑,结合标准规范与现网实现方式进行相关性分析,探究解决方案并同时探索更深应用场景与技术价值.

首先研究了5G NSA接入网共享方案,其次对基站设备、终端芯片、组网及运维优化复杂度等影响网络演进方案选择的因素进行了分析.最后对5G共建共享NSA向SA演进不同方案的技术要求、业务体验等进行深入研究,提出不同场景下的共享方案演进建议,供后续5G共建共享网络规划建设参考.

Based human visual speed perception characteristic, a video quanlity assessment(VQA) algorithm is introduced in the paper. Natural video statistics features extraction and weighting factors are incorporated in the scheme. In the VQA, considering the impact both video content itself and HVS's characteristic on human subjective perception, we propose weighting factors to scale the effect of those features, and it contains two parts: motion information and perception noise. And natural video statistics features relate to the spatial and temporal domain are extracted. The weighting factors would be used to combine both the temporal and spatial features, then generate the quality of each frame. Finally, the video quality score can be obtained by pooling scheme. LIVE database, EPFL-PoliMI database and some other generated test videos were used in our experiments, and the results indicate our model has outstanding performance.

In recently years, the communication networks envisage the prominent contradiction between the increased requirements for high-quality services and the gradually increased operational problems. However, the existing operation and maintenance face a series of problems: large volume of data, many control links, difficulty of problems localization. We can employ machine to efficiently analyze and deal with these problems. This paper proposes an analysis method for quality of service (QoS)-aware service in the field of operation and maintenance. The proposed method analyzes the correlation between QoS-aware service features and problem solution by mining service scene, operational data, and typical cases. The proposed method is useful for the customer service personnel to locate and solve the problem.

The big operators in the world begin to deploy LTE network with the gradual maturity of LTE technology. In order to realize the accurate planning to improve resource configuration efficiency, on researching main stream LTE network planning consider-ation in the world, it presents the planning methods based on 3G user perception and behavior analysis. That is beginning with the aspects on user perception:data service guaranteed speed, user feature, terminal capability and key network performance, to create evaluation model to form the multidimensional integrated evaluation method. Based on the above, it gives proposals on LTE wireless network deployment.

It analyzes the key technical points, network performance, planning procedure and deployment strategy on DC-HSDPA, ex-pounds the planning method and deployment emphasis on DC-HSDPA with an example, to provide reference for the deploy-ment of DC-HSDPA network.

Based on the characteristics of large open stadium,it analyzes a variety of new technologies for achieving the three-dimensional coverage and provides the suggestion of network design.

It describes HSPA+ planning from the aspects of application scene,baseband resource distribution,configuration of transmission bandwidth and carrier strategy.Combined with MIMO,DC-HSDPA technologies,it gives the future evolution of WCDMA HSAP+.

It analyzes the defects of the traditional omni-directional in-building antenna,summarizes the features of the new antenna.It proves the cover effects of new antenna with the test and gives the suggestions on the application of the new antenna.

Beginning with the problems on GSM network(including network infrastructure,equipment and maintenance),it presents the goal and principle on GSM network equipment relocation.Finally it summarizes the relocation plan of a certain province GSM network,to provide reference for the future plan.

It introduces the process and characteristic of time series analysis, multivariate statistical analysis and other forecast method.