支持行业应用的5G核心网方案

未来5G网络的应用目标和新的网络能力将主要向行业专网市场拓展,为此分析了虚拟专网、UPF专用、5GC专用这几种行业专网方案的技术特点和适用的应用场景,研究了还需要解决的问题,并且提出了应用建议,可为5G行业专网技术的后续发展和完善、部署和运营提供参考。     

4G向5G核心网演进发展方案研究

介绍4G向5G核心网演进发展过程中,非独立组网NSA架构和独立组网SA架构的对比分析,以及基于此对比下的演进策略。同时介绍演进过程中的云原生方案、网络管理运维演进方案,提出不同场景下的4G向5G核心网演进部署策略和建议。     

Coordinated Multicast/Unicast Transmission on 5G: A Novel Approach for Linear Broadcasting

Wireless Personal Communications - The underwate communication is of great interest of research for many researchers because of increased dealings of human beings with world exists underwater....     

基于云原生的5G核心网演进解决方案研究

随着5G网络的大规模部署,5G核心网的SBA架构改变了传统网络架构,真正实现了面向服务的下一代网络架构。文章分析云原生的关键特点,提出基于云原生的微服务架构天然适配5G核心网的SBA架构,并在此基础上具体阐述未来5G核心网演进解决方案,同时从现网的角度分析了未来5G核心网演进思路。     

5G网络传输解决方案

随着网络强国战略的推进,我国5G网络加快了建设步伐,传输网作为5G网络的基础,快速重构一张满足5G业务发展需求的传输网显得非常重要,5G网络业务的差异化需求带来传输网重构,5G传输新技术手段为5G传输网重构提供了支撑,在5G传输网解决方案原则基础上进行分阶段部署及重构5G传输网络,对减少投资加快5G网络建设和保障5G基站安全运行将起到重要作用。     

Secure Cloud Architecture for 5G Core Network

Service-based architecture (SBA) is a profound advancement in the novel 5G Core network (5GC). Existing studies show that SBA can benefit from cloud computing to achieve extensibility, modularity, reusability, and openness. It also brings security problems (e.g., hypervisor hijacking, and malware injection). To provide secure 5G services, we propose a service-based cloud architecture called Mimicloud for 5GC based on dynamic and heterogeneous techniques. Mimicloud provides flexible reconfiguration mechanisms to protect containers and eliminate all attack knowledge obtained from adversaries. We use multiple containers to execute crucial services and ensure security with crosscheck. Mimicloud employs heterogeneous components to prevent multiple containers from being breached through the same vulnerabilities. Experimental results show that Mimicloud can effectively strengthen the security of the 5GC. The performance overhead is analyzed in order to demonstrate its scalability.     

5G核心网的负载均衡策略

网络运营效率和服务质量是5G网络建设的重要指标,有效的负载均衡策略将起到基础性作用,而基于服务化架构和接口的网元是5G核心网和4G的主要区别之一,因此在对其进行分析的基础上,给出了多种负载均衡方式,并引入新老设备供应商的网元和新型节点的场景,试图构建出新的负载均衡策略的网络架构和控制流程,最后对实际业务案例进行了分析.     

3G核心网电路域信令监测系统分析

本文在分析3G核心网电路域网元及其信令协议特点的基础上,提出了3G核心网信令监测系统的组网架构,信令消息采集和处理方式,可为3G核心网信令监测系统的建设提供参考依据.     

浅析5G核心网网络安全

旨在构建万物互联信息时代的5G网络在推动社会发展的同时也将面临一些新的安全挑战。在5G网络规模商用之前进行网络安全的统筹规划和设计显得十分必要。从5G SA核心网角度,基于网络功能设计、业务及组网、安全运维等维度对5G核心网网络安全进行梳理和探讨,为运营商5G核心网规划建设和运营提供参考。     

5G网络切片解决方案和关键技术

为满足垂直行业的多样化应用需求,运营商需在5G网络中部署网络切片技术,按需分配网络资源。提出了5G网络切片解决方案架构,在端到端切片部署中引入了微服务、能力开放、智能选择和调度等关键技术,最后结合自动化运维管理要求,提出了5G切片分步部署建议,展望了切片技术的未来发展趋势。     

A Unified Framework for Multipath Routing for Unicast and Multicast Traffic

We study the problem of load balancing the traffic from a set of unicast and multicast sessions. The problem is formulated as an optimization problem. However, we assume that the gradient of the network cost function is not available and needs to be estimated. Multiple paths are provided between a source and a destination using application-layer overlay. We propose a novel algorithm that is based on what is known as simultaneous perturbation stochastic approximation and utilizes only noisy measurements collected and reported to the sources, using an overlay architecture.We consider three network models that reflect different sets of assumptions regarding multicast capabilities of the network. Using an analytical model we first prove the almost sure convergence of the algorithm to a corresponding optimal solution under each network model considered in this paper with decreasing step sizes. Then, we establish the weak convergence (or convergence in distribution) with a fixed step size. In addition, we investigate the benefits acquired from implementing additional multicast capabilities by studying the relative performance of our algorithm under the three network models.      

5G核心网技术演进及挑战

对移动核心网的技术演进进行了回顾,并详细分析了5G架构和关键技术演进。认为5G核心网在功能增强、云原生及软件技术、网络自动化、智能化等方面得到提升,但在应用和服务创新、网络成本以及自主可控等方面,仍然面临各种挑战。     

5G核心网的部署问题与建议

对5G核心网的服务化架构、网络切片、移动边缘计算(MEC)、用户面云化等关键技术和产业成熟度进行了深入分析,提出当前应用这些技术存在的问题、局限和挑战。在5G商用部署的时间节点上,给出了以上这些技术的具体应对策略和建议。     

5G核心网络技术的发展和应用

5G技术在数年内经历了多个发展阶段,并实现了网络自动化和智能化,在应用方面不断创新。文中通过对5G核心网络技术发展的分析,探索了其在社会生活领域的具体应用,旨在推动数字经济快速发展,构建5G应用大生态环境。     

5G核心网商用关键技术与挑战

针对5G核心网的快速商用部署和自动化运维挑战,探讨极简5G核心网、虚拟化解耦、网络切片、边缘计算技术和自动化运维等创新技术在5G核心网商用的方案;针对演进阶段的差异化需求和安全可靠挑战,探讨行业使能、控制面和用户面可靠性增强等创新技术的应用。通过这些关键技术研究和使用,提出基于意图的精准核心网的理念来满足5G网络多波次的商用需求。     

5G NSA核心网部署简化方案浅析

2019年是全球公认的5G移动通信网络部署元年。从整个产业链成熟度来看,2019年可以实现规模商用部署的5G网络均为NSA组网方式。重点讨论了5G NSA组网架构下对现有EPC核心网的新增功能要求,提出了NSA核心网升级的4种简化部署方案建议,并从高效部署与市场需求相结合的角度,对各方案做了详细的分析。     

5G核心网用户数据演进方案

从NSA演进到SA的关键之一是5G核心网的演进,而用户数据的演进在其中承担关键作用。为解决包括携号转网场景下5G NSA非独立组网向SA独立组网演进过程中的用户数据平滑演进问题,采用多场景对比分析方法,结合真实的5G SA网络的规划、设计、部署演进经验,总结提出了一整套NSA向SA演进用户数据平滑演进方案。该方案已经在国内和国际运营商的5G SA网络中得到了很好的验证。     

Scheduling Combined Unicast and Multicast Traffic in Broadcast WDM Networks

This paper studies the performance of various strategies for scheduling a combined load of unicast and multicast traffic in a broadcast WDM network. The performance measure of interest is schedule length, which directly affects both aggregate network throughput and average packet delay. Three different scheduling strategies are presented, namely: separate scheduling of unicast and multicast traffic, treating multicast traffic as a number of unicast messages, and treating unicast traffic as multicasts of size one. A lower bound on the schedule length for each strategy is first obtained. Subsequently, the strategies are compared against each other using extensive simulation experiments in order to establish the regions of operation, in terms of a number of relevant system parameters, for which each strategy performs best. Our main conclusions are as follows. Multicast traffic can be treated as unicast traffic, by replicating all multicast packets, under very limited circumstances. On the other hand, treating unicast traffic as a special case of multicast traffic with a group of size 1, produces short schedules in most cases. Alternatively, scheduling and transmitting each traffic component separately is also a good choice.     

3G无线网络无缝覆盖解决方案分析

移动通信的特点是要在任何时间、任何地点、接入任何业务,因此3G网络如何在较短的建设期内达到比较好的覆盖直接影响到3G的发展,本文对城市密集区、高业务区、郊区、农村、铁路/公路、隧道等几个区域的无线网络覆盖解决方案进行了阐述,其中对农村区域又根据地形的不同分为平原环境、丘陵/山区环境、水域/荒漠环境分别进行描述.     

用MSC in Pool技术组建池组化的2G／3G共用核心网

通过大量现有网络统计数据的分析,对合理分配话务、简化网络扩容、优化网络资源、提升设备利用率、保证网络安全等MSCinPool组网的优势进行了验证,最后通过对实际MscinPool网络的分析观察给出了MSCPool组网规划的相关建议。