传统固网运营商3G基站末端接入传输网络建设探讨

传统固网运营商在3G网络建设中,需对配套传输网络进行建设,其中对传输影响最大的是无线接入层,为满足RNC与NodeB之间Iub接口对传输的需求。Iub接口电路需跨越传输网的接入层和中继层,在中继层大部分可通过利用现有传输资源解决,在传输接入层必须依靠新建来解决。本文对传统固网运营商的3G接入传输即3G基站末端接入传输网络建设的组网方案、投资估算方法、建设注意事项等进行探讨。     

3G移动通信网基站接入解决方案探讨

文章基于对3G移动通信网基站接入传输需求的分析，对3G移动网基站的接入方案进行了分析论述，对3G基站传输网的初期建设提出了建议。     

TD—LTE双频组网模式传输技术应对策略分析

随着我国4G牌照的正式发放,运营商正式大规模部署TD—LTE网络。本文通过对TD—LTE基站F、D双频组网新需求的分析,结合传输网资源现状,提出TD—LTE双频组网模式下传输技术应对策略及建议。     

3G接入传输网中的光网络的组网分析

传输网络在任何移动通信中都是一个重要的部分,影响着服务,服务质量以及移动运营商的成本。3G传输网络也不例外,本文简介了3G传输网络特点并分析了以光纤传输网为基础各种接入传输网的组网技术。     

3G接入传输网中光网络的组网分析

传输网络在任何移动通信中部是一个重要的部分,影响着服务、服务质量以及移动运营商的成本。3G传输网络也不例外,本文简介了3G传输网络特点并分析了以光纤传输网为基础各种接入传输网的组网技术。     

3G接入传输网中的光网络的组网分析

传输网络是移动通信网络的重要组成部分,与服务质量、运营成本等有着紧密联系。文章就3G传输网的主要特点进行阐述,对3G接入传输网络组成结构进行分析,提出3G接入传输网中的主要组网技术,以更好地满足3G传输过程中的实际需求。     

关于CDMA网络本地传输网、接入网建设的探讨

结合中国电信CDMA本地传输网、接入网建设,就如何利用现网资源,以及解决基站接入、传输设备配置、组网等问题进行了探讨,总结出了一些适合于中国电信本地传输网、接入网融合和发展的参考经验。     

PTN网络及OTN网络融合方案研究

本项目创新性的提出了PTN+OTN联合组网模式,并将该成果率先应用本地城域网,试验并总结出业务应用、业务配置和规划、OAM管理维护、同步时钟传送等一系列优秀的网络实践,对下一代城域传输网的建设具有重要的参考价值。现网运行结果表明PTN+OTN联合组网模式是3G全业务时代,TD基站业务、重要数据业务等IP化业务的有效承载方案,有利于推动城域传输网向着统一融合的一体化承载网演进。     

面向5G无线接入业务的传输前传组网研究与实践

为了满足5G大带宽低延时广连接的业务特性，深入研究了C-RAN基站接入传输组网模式，并全面开展了部署和实践。针对全部基站接入业务，统一采用C-RAN传输前传组网模式，实现了降低OPEX和CAPEX的目标，同时提升了网络稳定性，解决了业务潮汐效应，加强了面向未来网络演进的快速部署能力。     

城域传输网中PTN的组网模式和引入策略

对分组传送网（PTN）技术在城域传输网中的技术定位、组网模式和引入策略进行了分析。技术定位方面,PTN适合应用在城域传输网的汇聚层、接入层;组网模式方面,大中型城域传输网适合采用PTN与ASON/WDM/OTN联合组网模式,对于小型城域传输网初期也可以考虑采用PTN完全独立组网模式;引入策略方面,应采用新老网络共存和逐步替换的方式以最大限度地保护现有投资。     

Performance evaluation of SDN-controlled green mobile fronthaul using a federation of experimental network testbeds

Photonic Network Communications - When evolved NodeB flexible functional split is implemented in virtualized radio access network 5G systems, fronthaul connectivity between the virtualized network...     

家庭基站位置限制方案研究

家庭基站(home NodeB)又称Femto基站,是指通过集成电信基础设施的所有主要功能作为传统基站室内扩展的通信设备.本文首先讨论了Femto基站的发展趋势及其在未来全业务运营中的重要意义,特别指出了对Femto基站使用位置进行限制的必要性和可行性,并介绍了目前典型的基于宏基站信号空口侦听的Femto基站位置限制方案.最后,从网络侧设备地址绑定的角度,提出了两种新型的Femto基站位置限制解决方案.     

新型家庭基站鉴权技术解析

Femto基站是一种新型的家庭基站,Femto系统中存在Femto基站用户鉴权、Femto基站设备鉴权、Femto基站下移动用户鉴权等多层次的鉴权需求,可选用包括基于SIM/USIM卡、基于证书等多种实现机制,本文详细阐述了业界几种主流鉴权方式及其相互关系,并结合移动网络需要,给出了移动运营商的选择建议.     

3GPP 3G家庭基站标准化进展

文章介绍了3GPP在3G家庭基站的业务需求、网络架构、无线射频、管理维护(OAM)和安全等方面的标准化进展,并指出了当前研究的一些主要技术方向.     

A game theoretic approach to minimum-delay scalable video transmission over P2P

In this paper we describe a game theoretic framework for scalable video streaming over a peer-to-peer network. The proposed system integrates minimum delay functionalities with an incentive provision mechanism for optimal resource allocation. First of all, we introduce an algorithm for packet scheduling that allows users to download a specific sub-set of the original scalable bit-stream, depending on the current network conditions. Furthermore, we present an algorithm that aims both at identifying free-riders and minimising the transmission delay. Uncooperative peers are cut out of this system, while users upload more data to those which have less to share, in order to fully exploit the resources of all peers. Experimental evaluation shows that the proposed model can effectively cope with free-riders and minimise the transmission delay for scalable video transmission by exploiting a packet scheduling algorithm, game theory, and a minimum-delay algorithm.     

一种微机异步通信网络PC—TALK的实现

本文介绍了一种微机异步通信网络。该网价格低谦、通信功能完善，可以实现文件传送、文件猎取、电子邮件、图形、表格传送等多种功能，是一种在通信速率要求不高、数据传送不是太频繁的情况下，实现近远程通信的理想网络系统。     

区级有线数字电视网络改造中1550系统的应用

主要分析了1 550系统在区级有线数字电视发展中应用的优势,在原有线电视1 310 nm波长光纤联网的基础上,以1 550 nm波长的光纤系统传输广播电视信号到镇乡和城区节点,以提高传输质量。介绍了掺铒光纤放大器（EDFA）在1 550 nm波长的光纤传输中的应用,论述了改造设计时应注意的问题。     

Analysis of TCP performance under joint rate and power adaptation in cellular WCDMA networks

To improve the spectral efficiency while meeting the radio link level quality of service requirements such as the bit-error-rate (BER) requirements for the different wireless services, transmission rate and power corresponding to the different mobile users can be dynamically varied in a cellular wideband code-division multiple-access (WCDMA) network depending on the variations in channel interference and fading conditions. This paper models and analyzes the performance of transmission control protocol (TCP) under joint rate and power adaptation with constrained BER requirements for downlink data transmission in a cellular variable spreading factor (VSF) WCDMA network. The aim of this multilayer modeling of the WCDMA radio interface is to better understand the interlayer protocol interactions and identify suitable transport and radio link layer mechanisms to improve TCP performance in a wide-area cellular WCDMA network.     

改进的正比公平调度算法

3GPP从R6版本开始,开展了对高速上行分组接入(HSUPA)技术的研究和标准制定工作。基于基站(NodeB)的调度算法是HSUPA的三大技术之一,对它的研究能有效地改善HSUPA系统性能,使系统的上行资源得以更充分的利用。在简述HSUPA中基于NodeB的典型调度算法的基础上,它针对用户的公平性给出了三种改进的正比公平调度算法,并在吞吐量和公平性上与典型调度算法进行仿真对比,仿真验证了当各个信道的衰落特性差别很大时,与正比公平调度算法相比,改进的正比公平调度算法有效地提高了用户的公平度,改善了系统性能。     

A packet scheduling scheme for 4G wireless access systems aiming to maximize revenue for the telecom carriers

Efficient utilization of network resources is a key goal for emerging BWAS. This is a complex goal to achieve due to the heterogeneous service nature and diverse QoS requirements of various applications that BWAS support. Packet scheduling is an important activity that affects BWAS QoS outcomes. This paper proposes a new packet scheduling mechanism that improves QoS in mobile wireless networks which exploit IP as a transport technology for data transfer between BWAS base stations and mobile users at the radio transmission layer. In order to improve BWAS QoS the new packet algorithm makes changes at both the IP and the radio layers. The new algorithm exploits handoff priority scheduling principles and takes into account buffer occupancy and channel conditions. The packet scheduling mechanism also incorporates the concept of fairness. The algorithm offers an opportunity to maximize the carriers’ revenue at various traffic situations. Simulation results were compared to well-known algorithms which demonstrated the new packet scheduling algorithm is able to provide a low handoff packet drop rate, low packet forwarding rate, low packet delay, ensure fairness amongst the users of different services and generates higher revenue. Furthermore this research proposes a new and novel measure named “Satisfaction Factor” to measure the efficacy of various scheduling schemes and finally proposes four performance metrics for NodeB’s of in Next Generation Wireless Networks.