China Mobile operates the world’s largest 5G network, with the most significant user base globally. With the application of 5G network technology and Internet of Things (IoT) scenarios becomes more widespread, a large number of devices will connect to China Mobile’s 5G network for communication, interaction and data processing. In computation-intensive scenarios, China Mobile applies edge computing as a supplemental method, offloading user tasks to edge servers to alleviate issues like high latency and bandwidth limitations existent in cloud computing. However, continuous task flows generated by users pose considerable challenges to the limited computation resource of edge servers. In this paper, we investigate dynamic task scheduling oriented towards user perception in 5G edge computing networks. With constraints on computational resources, we have converted the original problem into a user perception quality maximization problem based on the Markov Decision Process (MDP). Considering the uncertainty and dynamics of the state space, we propose a deep reinforcement learning (DRL) based user perception optimization (DUPO) algorithm, introducing an autonomous intelligent decision-making strategy between task computation and cache matching to handle a continuous influx of user tasks. Extensive simulation results indicate DUPO can dynamically adjust the task execution strategy according to random task demand and the system environment, effectively enhancing user perception.

用户的投诉行为既受到客观网络环境作用,又具有强烈的主观行为意识.通过收集投诉用户的主客观数据特征,引入机器学习算法预测潜在的投诉用户,提早介入进行网络优化和用户关怀,能够有效降低网络投诉的发生.本文介绍了一种基于XGBoost算法的投诉用户特征识别和预测方法,通过收集投诉用户数据特征,构建投诉特征指标集,利用XGBoost算法迭代处理实现潜在投诉用户预测.经大量数据验证,本算法可有效实现对网络潜在投诉预测,为网络优化提供了重要依据.

随着家庭宽带行业的快速发展,全国家庭宽带普及率已接近100％,人口红利逐年放缓,家庭宽带的品质服务成为了行业发展的热点.家宽软探针作为监测设备性能指标和业务质量的技术手段之一,有助于从感知拨测和行为分析等方面深入挖掘用户状态.本文以家宽智能网关和机顶盒的软探针数据为基础,构建家宽质差识别体系,实现家宽不满意用户的识别及网络异常的发现,有利于主动发现潜在投诉用户,降低用户投诉率并提升用户满意度.

5G网络具备室内外同频组网和室外宏站深度覆盖能力增强等特点,同时,室内网络频段及覆盖方式的变化,都会对室内覆盖的性能产生影响.本文从5G室内覆盖性能分析出发,针对室内覆盖网络面临的室内外同频干扰和传统室分升级等问题进行分析,给出了5G室内覆盖网络规划升级时需要重点解决问题的建议.

随着5G时代的来临,人们对于室内覆盖的方方面面提出了更高的要求.传统DAS方案由于部署困难和容量增长有限等因素不适应于5G发展的趋势.4G分布式皮基站可以通过改造方式支持5G NR,工程实施难度相对简单,并且可实现4×4 MIMO,容量性能较为优异,适合5G室内覆盖的许多场景.本文对于分布式皮基站建设方案中Pico RRU的布放位置进行了研究,基于遗传算法设计了在图纸中自动布放Pico RRU的功能,从而提升了室内分布系统方案设计的效率.

为提升室内覆盖设计图纸的标准化及电子化水平,促进形成自动化、规范化、集中化的室内覆盖图纸设计审核能力,本文通过信息化手段,研发一套立足于规范化、标准化的室内分布系统设计工具,与智能化、高效化的室内分布系统在线审核平台,并研究制定一套室分设计方案的审核规则,实现室内分布系统方案设计与智能审核,从源头上确保了室分设计的准确性和覆盖质量的提升.

在室内分布系统设计中,如何能够根据不同场景的覆盖需求选择最佳的方案一直是困扰设计人员的一大难题.本文提出了一种基于覆盖需求的室内分布系统设计优化方案,能够根据不同天线点的实际需求自由进行设计方案优化.该方案已经集成到中国移动设计院自主研发的先进室内设计平台(AIDP)中,本文将AIDP软件的优化结果与业内常用工具的优化结果进行了对比分析,充分验证了该方案在天线功率设置灵活性、优化结果准确性等方面的优势.

为了满足人们对室内定位的需求,通过三层架构新型室内覆盖设备的引入提升了室内定位能力.研究了三层架构室内覆盖设备定位算法,设计了不同场景下的定位能力评估方案,开展定位精度评估,验证了主流三层架构室内覆盖设备的定位能力,为运营商的定位运营策略提供了技术储备.

In this paper, we introduces the method of backbone routing optimization used in the software of indoor distribution system design and analyzes the shortcomings that designers always choose devices and source power value by experience which often cause the problems that the design scheme is unreasonable, time-consuming, high-cost, and great difference can be made. In addition, the effects of the common software for the backbone optimization results were limited. Therefore, we proposed a new backbone routing optimization algorithm, which can select the optimal combination of devices and adjust the source power value automatically. By this way, a meaningful application value of the optimized method can be achieved.

In this paper, based on the different types of POI, we carry out theoretical analysis and testing for the possible interference, give a solution for the potential interference problems of POI and provide the guidance for the construction of indoor distribution systems.

With the widely development of high power and multi-channel system, passive intermodulaton (PIM) caused by passive components can not be neglected anymore. In this paper, an experimental investigation of the relationship between PIM levels and the carrier powers has been carried out and the results are reported and fitted. Then the performance requirement of passive component used in wireless system is introduced and frequency planning method to avoid effective hit of PGSM is provided.

首先介绍了室内无线电波的传播特性和经验传播模型,之后基于一个典型的地下停车场场景,在TD-LTE系统特定频段(2360MHz和2680MHz)下进行了路径损耗测试,接着对基于ITU-R P.1238-7的室内传播模型的通用模型的系数进行拟合校正,并将校正后的拟合曲线与自由空间模型的曲线进行对比.最后基于软件工具进行场强预测,提出了一种有效的预测性能提升方法,获得了更好的用户体验.

In mobile communication systems, the intermodulation interference caused by the non-linearity of passive components may have a greater impact on the performance of networks, especially in a scene of multi-system combiners or sites deployed adjacent to each other. In this paper, we comprehensively analysis all the intermodulation interference may face by coexistence of multiple systems based on the third-order, the fifth-order and the seventh-order of passive intermodulation characteristics and with the frequency band of mobile communication systems for all mobile communication operators, which provide important reference for network design and construction.

Miniaturization test system will achieve the two goals including reduce costs and improve efficiency. In this paper, first we explain the research background and demonstrate the two key technologies of the miniaturization test system, then explain the scenarios of the miniaturization test system. At last, we conduct laboratory and field tests based on the prototype to verify the feasibility of the miniaturization test system.

With the explosive growth of mobile communication and the rapid development of mobile data traffic,many countries around the world began the commercial LTE process.With the further development of LTE,part of the spectrum used by the existing 2G network will be assigned to LTE.It will bring the coexistence interference between LTE and GSM systems,in order to ensure that LTE and GSM systems can both be normally operated,the development of the adjacent channel coexistence protection program is one of the key issues that need to be addressed by refarming technology.In this paper,we deeply study the adjacent channel interference between LTE and GSM systems,put forward the guard-band between the coexistence of different standard of LTE and GSM systems and lay a solid foundation of refarming technology.

In mobile communication systems,the intermodulation interference caused by the non-linearity of passive components may have a greater impact on the performance of systems,especially in a scene of multisystem combiners or sites deployed adjacent to each other.In this paper,we comprehensive analysis all the intermodulation interference faced by all mobile communication systems based on the third-order,the fifth-order and the seventh-order of passive intermodulation characteristics and with the frequency band of mobile communication systems for all mobile communication operators,which provide important reference for network design and construction.

In this paper,based on the comprehensive analysis of the global spectrum planning program,we indepth study of the evolution of the global spectrum management policy,provide a strong support of the application of the spectrum,the use of the spectrum and the promoting of the spectrum planning for China Mobile,and play a very important role in promoting the development of TD and its evolution.

The frequency band 2320-2370MHz is one of the frequency bands for TDD systems in China, the indoor distribution system of TD-LTE will use this band to deploy in the future. On the other hand, WLAN system works in the 2.4 ~ 2.4835 GHz. In this paper, coexistence experiment results between indoor distribution systems of TD-LTE with WLAN AP around the 2.4GHz band were presented first, these results show that the interferences are significant. According to interference analysis, the reasons of interference are found, and the relevant avoiding interference proposals are provided. It will enhance spectrum efficiency and utility and ensures both systems launch harmoniously in this frequency.

文章重点研究了在TD-LTE与WLAN的共室内分布系统建设时面临的邻频干扰问题。首先基于对WLAN设备的性能测试结果,通过理论方法对邻频干扰程度及可能的干扰解决方案进行了分析;然后通过实际的网络性能测试进一步验证了两系统共室内分布系统所面临的干扰,并确认了干扰解决方案的可行性。

With the explosive growth of mobile communication and the rapid development of mobile data traffic, many countries around the world began the commercial LTE process. With the further development of LTE, part of the spectrum used by the existing 2G network will be assigned to LTE. It will bring the coexistence interference between LTE and GSM systems, in order to ensure that LTE and GSM systems can both be normally operated, the development of the adjacent channel coexistence protection program is one of the key issues that need to be addressed by refarming technology. In this paper, we deeply study the adjacent channel interference between LTE and GSM systems, put forward the guard-band between the coexistence of different standard of LTE and GSM systems and lay a solid foundation of refarming technology.