应用华为接入网环境监控板实现接入网动力及环境监控

首先阐述了如何选择监控量,接着分析了接入网动力环境监控系统的组网模式,然后介绍了海口专用通信局应用华为接入网环境监控板组建接入网动力及环境监控系统的实际应用案例,着重指出了接入网动力及环境监控系统的建设应充分考虑网络的投资效益,做到以实用为原则。     

通信机房标准化动力环境监控系统的应用研究

科学管理通信机房的动力环境,是实现网络通畅的基础保障。文中通过对标准化动力环境监控系统应用于通信机房的作用、具体监控的内容进行了梳理,并结合标准化动力环境监控系统的网络架构、网络特点及系统的硬件设备构成,对该通信机房监控系统的应用展开了分析,希望为从业者提供一定的参考。     

动力环境监控网络实现方法在陕西联通的应用

随着长途通信网的不断完善,地理位置偏僻、长期无人值守的通信机房越来越多,传输设备可以通过传输网网管实时监控,但动力环境却处于无法监控状态。如何实现动力环境监控,如何维护好动力环境网络是维护人员十分关注的问题。本文以陕西联通省干动力环境监控系统实际应用为例,简单地介绍无人值守中继站动力环境监控网络的实现方法及后期维护的相关问题。     

动力环境集中监控网络的模式与比较

对动力环境集中监控系统的网络结构，数据处理模式及系统性能要求较为具体的介绍，提出了监控网各级算法的概念及分析方法，并对所提出的几种模式进行了分析。     

网络虚拟化环境下资源监控策略

在网络虚拟化环境下,对底层物理网络资源状态的实时监控有助于更好地为虚拟网络服务提供支持。构建了虚拟网络资源管理架构,采用了基于监控代理的策略来实现网络资源的实时监控,并综合考虑监控信息上报所需的带宽、时延以及节点负载能力,构建了监控代理部署问题的二进制组合优化模型,通过改进的粒子群算法来求解该问题的近似最优解。仿真结果表明:该策略生成的监控方案具有较好的性能表现。     

山东电信引进艾默生环境集中监控系统

艾默生网络能源公司凭借其在动力环境集中监控领域的强劲实力及旗下品质卓越的PSMS动力环境集中监控系统,一举中标山东电信济南、青岛、烟台、潍坊等11个城市CDMA网近千个基站的动力环境集中监控项目。为了保证项目建设的质量,山东电信启动C网基站动力环境集中监控项目时选择了综合实力强的艾默生网络能源公司。     

动力环境监控系统在通信电源中的应用

通信电源是通信网络的动力基础,其功能会直接影响通信系统的运行质量。文中采用案例分析法,在详细了解案例项目通信电源功能现状的基础上,总结了动力环境监控系统的实现方案,介绍了该项目在系统功能架构及系统关键功能中的设置方案,最后详细评估了动力环境监控系统的功能与运维管理效益。根据案例项目的经验可知,该项目在设置动力环境监控系统后,显著提升了通信电源的综合监控能力,具有可行性。     

网络虚拟化环境下的资源监控策略

在网络虚拟化环境中,需要对底层网络资源状态进行实时监控,合理的监控策略应该尽量减少状态信息上报所需的时延和带宽。为了实现该目标,该文设计了一种基于监控代理的资源监控策略,该策略将监控代理的部署转化为0-1规划问题,并通过改进的量子遗传算法对该问题进行求解。仿真实验表明:该策略生成的监控代理部署方案在降低通信开销方面有着较好的表现。     

国内运营商国际互联网互联互通方案探讨

随着海外互联网市场的不断拓展,中国电信、中国联通等运营商,通过自建海外IP网络、与国际运营商网络互联互通等方式不断扩大网络全球覆盖、提升网络可达范围、引入更丰富互联网资源。从国际互联网互联互通架构与模式等出发,基于国内运营商的国际互联网互联互通建设及运营过程中的互联方寻找、互联互通需求评估、模式选择、互联互通落地及优化、互联互通结算等方面视角,研究了国际互联网互联互通解决方案,并提供了可供参考的互联互通部署建议。     

基于OTN GPON技术的平安城市视频监控方案设计

针对平安城市的建设需求及高清视频监控技术的不断发展,分析了目前平安城市视频监控系统存在的不足,设计了基于OTN+GPON的平安城市视频监控系统组网方案,不仅可以实现各监控部门之间的互联互通,提高公安部门的办事效率,还为今后网络扩容及监控系统的智能发展奠定基础。     

Power control and capacity analysis for a packetized indoormultimedia DS-CDMA network

This paper proposes a packetized indoor wireless system using direct-sequence code-division multiple-access (DS-CDMA) protocol. The indoor radio environment is characterized by slow Rayleigh fading with or without lognormal shadowing. The system supports multimedia services with various transmission rates and quality of service (QoS) requirements and allows for seamless interfacing to asynchronous transfer mode (ATM) broadband networks. All packets are transmitted with forward error correction (FEC) using convolutional code for voice packets and Bose-Chaudhuri-Hocquenghem (BCH) code for data packets with an automatic retransmission request (ARQ) protocol and for video packets without ARQ. A queueing model is used for servicing data transmission requests. A power control algorithm is proposed for the system, which combines closed-loop power control with channel estimation to give the best performance. The cell capacity of each traffic type and various multimedia traffic configurations in both single-cell and multiple-cell networks are evaluated theoretically under the assumption of perfect power control. The effect of power control imperfection on the capacity using the proposed power control algorithm is investigated by computer simulation     

下一代通信核心网络的电源供电方式

本文在深入研究下一代通信的核心网电源供电的现状的基础上,揭示了目前NGN和3G试验网和商用网中电源供电存在的安全问题和运行风险,提出了在下一代网络核心机房中全部采用直流供电的必要性和可能性,还对未来建设下一代网络提出了一些合理化的建议.     

浅论通信电源新进展

随着网络建设的发展和电源技术的进步,新的电源解决方案和产品不断涌现.传统的户内电源在功率密度,环境适应性等方面取得长足进步,EMC/安规和环保等设计理念在产品设计中也得到越来越多的重视.电源发展呈现出个性化的趋势,以适应网络个性化的要求.此外,新型户外电源的出现为运营商低成本快速建设网络提供了新的思路.     

本地网电源集中监控系统的架构

介绍本地网通信电源及空调集中监控系统的网络结构、传输方式，并给出一种优化方案，同时以沧州本地网通信电源及空调集中监控系统为例进行详细分析。     

Quorum-Based Asynchronous Power-Saving Protocols for IEEE 802.11 Ad Hoc Networks

This paper investigates the power mode management problem for an IEEE 802.11-based mobile ad hoc network (MANET) that allows mobile hosts to tune to the power-saving (PS) mode. There are two major issues that need to be addressed in this problem: (a) wakeup prediction and (b) neighbor discovery. The former is to deliver buffered packets to a PS host at the right time when its radio is turned on. The latter is to monitor the environment change under a mobile environment. One costly, and not scalable, solution is to time-synchronize all hosts. Another possibility is to design asynchronous protocols as proposed by Tseng et al. in [25]. In this paper, we adopt the latter approach and correlate this problem to the quorum system concept. We identify a rotation closure property for quorum systems. It is shown that any quorum system that satisfies this property can be translated to an asynchronous power-saving protocol for MANETs. Thus, the result bridges the classical quorum system design problem in the area of distributed systems to the power mode management problem in the area of mobile ad hoc networks. We derive a lower bound for quorum sizes for any quorum system that satisfies the rotation closure property. We identify a group of quorum systems that are optimal or near optimal in terms of quorum sizes, which can be translated to efficient asynchronous power-saving protocols. We also propose a new e-torus quorum system, which can be translated to an adaptive protocol that allows designers to trade hosts' neighbor sensibility for power efficiency. Simulation experiments are conducted to evaluate and compare the proposed protocols.     

油田通信动力环境监控系统的应用

机房动力环境对油田通信系统的安全稳定运行至关重要,机房的温湿度、电源设备的运行状况、机房门开启状态等都是事关通信设备能否正常工作的要素。因此,油田通信动力环境监控系统的重要性日益突出。文章介绍了油田通信动力环境监控系统的监控内容、系统组网结构、数据传输方式等。     

Energy-efficiency clustering protocol in wireless sensor networks

The conventional clustering method has the unique potential to be the framework for power-conserving ad hoc networks. In this environment, studies on energy-efficient strategies such as sleeping mode and redirection have been reported, and recently some have even been adopted by some standards like Bluetooth and IEEE 802.11. However, consider wireless sensor networks. The devices employed are power-limited in nature, introducing the conventional clustering approach to the sensor networks provides a unique challenge due to the fact that cluster-heads, which are communication centers by default, tend to be heavily utilized and thus drained of their battery power rapidly. In this paper, we introduce a re-clustering strategy and a redirection scheme for cluster-based wireless sensor networks in order to address the power-conserving issues in such networks, while maintaining the merits of a clustering approach. Based on a practical energy model, simulation results show that the improved clustering method can obtain a longer lifetime when compared with the conventional clustering method.     

拟态物理学多目标算法求解认知参数优化问题

针对认知无线网络中的引擎参数调整问题,提出了一种基于拟态物理学多目标优化的求解算法.根据认知参数编码的二进制特点,设计了基于海明距离的个体排序方法,并改进了微粒的更新方程,最后求出问题的Pareto最优解集.多载波环境下的仿真实验表明,算法可以根据无线信道环境的动态变化和认知用户需求的不同需求,自适应调整各个子载波的调制方式和发射功率,满足参数优化需求.     

电力系统区域网的分析与计算方法

本文在电网络理论的基础上,提出了一种分析计算大规模电力系统区域网的方法,文中首先应用网络分块结点抑制法推导出区域网等效结点电压方程式。然后,列举一个小规模的网络来说明应用这种方法计算的过程。这种方法适用于大规模电力系统区域网的计算．它可以减少计算工作量,提高计算速度。     

Performance Evaluation of Sleep Mode on Power Saving in WiMAX IEEE 802.16m and LTE DRX

Power saving represents a vital role in mobile communications networks such as IEEE 802.16m and LTE. Modern user equipment (UE_s) require high data rates and low power consumption. It is found that arranging sleep mode mechanisms ensures UE battery longer lifetime. In this paper, different sleep mode mechanisms are investigated for both IEEE 802.16m and LTE networks. The analyses are based on Markov and Semi-Markov chains. It is focused on the determination of UE transition state. Web traffic model parameters were considered in MATLAB simulation and a comparison assessment was conducted between WiMAX IEEE 802.16m and LTE DRX. It was found that LTE DRX sleep mode provides more power saving than WiMAX IEEE 802.16m sleep mode. The study is now implemented for 5G networks with encouraging results.