3GPP网络接入安全的发展及趋势

终端与服务网之间的接口是移动通信系统中最容易受到攻击的部分,因此接入安全成为系统安全的关键。本文介绍了3GPP网络从GSM到LTE接入安全的发展概况,总结了高速率真分组数据接入演进分组系统的鉴全机制,分析了其与LTE接入的主要区别,最后提出未来EPS接入安全需要解决的几个问题。     

CDMA网络接入EPC的关键技术分析

EPS系统的优点之一是可以支持非3GPP无线网络接入,其中包括CDMA网络,而EPS的核心网EPC是3GPP和3GPP2在核心网层面实现融合的基础。由于CDMA和EPC是两个标准组织分别制定的技术标准,因此需要一些特别的关键技术来实现CDMA网络接入EPC,其中包括PMIP隧道承载管理、多PDN连接以及CDMA与EPC网络之间的QoS转换等,本文将通过对这些技术的介绍,分析CDMA网络在接入EPC时如何实现3GPP2技术和3GPP技术的转换和承接。     

市级广电传输网络的整体架构及规划

广电传输网络的建设旨在通过先进、合理的技术选型,建立安全、可靠、开放、易扩展、易维护的全业务智能化业务承载平台,在广电传输网络建设时应尽量做好可行性分析、统筹规划,在满足业务承载的同时,充分发挥网络的规模效应.主要以市级广电传输网络为例,结合当下技术的演进趋势,从广电传输网络的前端系统、汇聚及分发系统、接入系统、运营保障系统等组成部分及广电传输网络的频率、业务流向、系统容量、系统管理等相关方面,进行探究和规划思考.     

LTE网络测试方法学探讨（续一）

4.3带有UMTS的EPC拓扑（见图4） 这个测试拓扑,可以验证EPS网络是否有能力承载3G UMTS/HSPA接入网络。 EPC的设计可以比LTE RAN提供更多的服务,在设计之初就可以接受其他3GPP分组接入网络（UMTS）和非3GPP接入网络（如Wi-Fi）。有了这个设计,不同的接入方式可以被锚定在EPC核心上,而这一功能由SGW和PGW提供。     

3G接入传输网技术

文章介绍了3G网络的体系结构、3G接入传输网络的可用技术方案,重点讨论了RNC和NodeB之间Iub接口上基于ATM和AAL2交换的3G接入传输网络技术。     

移动通信中的无线接入安全机制

本文全面介绍了2G和3G系统的无线接入安全措施,并比较分析了2G网络安全性方面的不足,以及3G网络安全性能的改善和2／3G互通时的接入安全解决方案。     

FTTx中BAC设备组网方案研究

在接入网络"光进铜退"迅速推进的形势下,越来越多贴近用户的语音接入设备连人软交换网络.如何保证软交换网络的安全与服务质量是电信运营商关注的一大问题.本文介绍了软交换边缘接入控制(BAC)设备的定义、作用与网络中所处位置,根据现网中语音接入设备所处的不同场景提出了BAC设备的部署策略,并对未来应用的大容量BAC设备的组网方案进行了研究.     

有线电视网络的发展现状与趋势

双向化改造后的有线电视网络,既是广播电视信号的传输网络,也是宽带业务的承载网络,是有线电视运营商实现业务发展与转型的基础网络.其中有线接入网络是有线电视网络发展的关键,与用户带宽需求和有线接入技术的发展密切相关.通过调研当前国内外有线电视网络的发展现状、有线接入技术及标准的研究进展,分析了有线接入网络的发展趋势,最后对一种自主创新的吉比特同轴接入技术(HINOC)进行了介绍.     

第三代移动通信系统网络接入安全机制分析

3G移动通信系统中的接入安全技术是在2G安全基础上建立起来的,克服了GSM中的问题,增加了新的安全功能。虽然3G系统网络接入的安全协议较GSM系统有所改进,特别是增加了移动台对网络的鉴权,但安全协议并没有完全达到其设计目标,如何完善还需进一步探讨。     

有线电视网络安全监控系统

有线电视网络安全监控系统是广电总局广播科学研究院为保证有线电视网络安全和播出节目安全而研究开发的计算机监控系统。本系统采用了具有高新科技含量的软、硬件技术手段 ,在保证系统本身安全的基础上 ,识别各种进入有线电视信号传输环节的非法节目并报告传输网络的质量。系统特点本系统针对有线电视网络安全监控特点 ,专门开发了数字台标机、远程监控机以及有线电视网络安全ＧＩＳ监控中心软件平台 ,整个系统采用安全加密技术 ,在保证系统本身安全的基础上 ,实时监测所有频道 ,通过远程监测器回传网络接入系统可迅速识别各种进入有线电视…     

An access-aware pricing strategy for the evolved packet system

The evolved packet system (EPS) integrates third generation partnership project (3GPP) and non-3GPP wireless access networks to provide mobile users with ubiquitous access to a diverse set of multimedia services. As we know, 3GPP and non-3GPP access networks differ significantly with respect to bandwidth capacity, coverage range, and service cost. It is crucial to enable efficient load balancing between 3GPP and non-3GPP access networks to improve resource utilization, and still maximize revenue generation. From an economic point of view, pricing plays an important role in achieving load balancing in the EPS. This paper proposes an access-aware pricing strategy for the EPS to achieve load balancing between 3GPP and non-3GPP access networks and to maximize revenue generation for network operators. In addition, this paper develops an analytical model for the system using the proposed access-aware pricing strategy. With the analytical model, this paper also proposes an iterative method for determining the optimal pricing that maximizes revenue generation in the EPS. The analytical model is verified by simulation.     

LTE与非3GPP接入网的系统架构研究

首先分析了LTE与非3GPP互通系统架构配置,描述了3GPP互通系统架构中的逻辑单元（包括用户设备、非3GPP可信网络、非3GPP不可信接入网和EPC）,给出了非3GPP互通系统架构中的接口与协议,讨论了非3GPP互通系统架构中的漫游问题。     

Dynamic network composition for beyond 3G networks: a 3GPP viewpoint

The 3GPP network specification is currently undergoing major updates toward beyond 3G. The evolved 3GPP network will support interworking with multiple including non-3GPP - radio access networks, and support mobility between them. It will furthermore support personal area networks and moving networks. Generally, 3GPP is moving in the direction of an all-IP network. This article gives an overview of current beyond 3G trends in 3GPP, and particularly introduces a new 3GPP study item on network composition. The concept of network composition was developed by the EU project Ambient Networks. Whereas 3GPP until now assumes static networking relations, network composition addresses a dynamic, generic establishment of control-plane interworking between the heterogeneous network types of today, such as 3GPP core networks, non-3GPP operator networks, heterogeneous access networks, and personal area networks     

Improving session continuity through user mobility tracking for EPS inter‐serving gateway handover

The Evolved Packet System (EPS) is standardized to support a common IP‐based core network with heterogeneous radio accesses in the latest 3GPP release. In the EPS, the Policy and Charging Control (PCC) framework provides dynamic policy control combined with real‐time charging management. Long core network signaling for PCC degrades session continuity performance during handover. In this paper, we investigate the handover for an EPS session. Based on the results, we propose a proactive scheme along with a user mobility tracking model to improve session continuity. More specifically, our proposed scheme attempts to reduce PCC reauthorization signaling delay during the handover procedure. Then, we formulate a Markov process to model the user mobility pattern and to derive the session continuity probability. Numerical results show that our scheme can significantly keep the session continuity at a user acceptable level even when the mobility pattern is high. We also provide guidelines for operators to set up the network configuration parameters according to various traffic conditions. Copyright © 2011 John Wiley & Sons, Ltd.     

Network-based mobility management in the evolved 3GPP core network

A key aspect of the 3GPP system architecture evolution is the specification of an evolved packet core that supports multiple access networks. The EPC enables operators to deploy and operate one common packet core network for 3GPP radio accesses (E-UTRAN, UTRAN, and GERAN), as well as other wireless and wireline access networks (e.g., eHRPD, WLAN, WIMAX, and DSL/Cable), providing the operator with a common set of services and capabilities across the networks. A key requirement of the EPC is to provide seamless mobility at the IP layer as the user moves within and between accesses. This article provides an overview of the EPC specifications that use a network-based mobility mechanism based on Proxy Mobile IPv6 to enable mobility between access networks. An important facet of providing seamless mobility for a user?s sessions across technologies is to ensure that quality of service is maintained as the user moves between accesses. An overview of the ?off-path? QoS model to supplement PMIPv6 is also provided.     

Seamless integration of mobile WiMAX in 3GPP networks

As the wireless industry makes its way to the next generation of mobile systems, it is important to engineer solutions that enable seamless integration of emerging 4G access technologies within the currently deployed and/or evolved 2G/3G infrastructures. In this article we address a specific case of such a seamless integration, that of mobile WiMAX in evolved 3GPP networks. In this context we investigate the architecture and the key procedures that enable this integration, and we also introduce a novel handover mechanism that enables seamless mobility between mobile WiMAX and legacy 3GPP access, such as UTRAN or GERAN. The core characteristic of this novel handover mechanism is that mobile terminals do not need to support simultaneous transmission on both WiMAX and 3GPP accesses; therefore, it mitigates the RF coexistence issues that exist otherwise and improves handover performance. In addition, we provide a brief overview of mobile WiMAX and the evolved 3GPP network technologies, and we set the appropriate background material before presenting our proposed handover mechanism. Our main conclusion is that integrating mobile WiMAX in evolved 3GPP networks is a compelling approach for providing wireless broadband services, and mobility across WiMAX and 3GPP access can become seamless and efficient with no need for mobile terminals to support simultaneous transmission on both types of access.     

浅析5G语音方案EPS Fallback时延因素

3GPP R15协议提出EPS Fallback和VoNR两种5G语音解决方案,其中EPS Fallback作为当前5G SA优先部署语音解决方案.为降低EPS Fallback时延大对用户语音业务感知影响,本文采用基于SIP协议呼叫流程的EPS Fallback信令分段分析方法,查找影响EPS Fallback流程时...     

CDMA向EPS网络演进架构的研究

3GPPEPS标准是CDMA网络演进的主要目标。本文分析了CDMA网络演进的总体趋势和方向,研究了CDMA向EPS演进中语音和数据业务互操作的需求和各演进阶段的网络特征,给出了可能的分阶段网络演进架构。