为提高光网络的生存性,提出一种基于业务时延容忍度及报警反馈评估的故障业务恢复算法.首先,应用基于混合进化神经网络的链路多故障定位模型,从大量报警信息中准确定位故障位置;然后,对故障业务进行时延容忍度评估,并以此为依据为故障业务排列恢复顺序.此外,根据各链路上报警信息的种类和数量,对每条链路进行了可靠性评估,优先选择可靠性更高的链路进行路由.仿真结果表明:该算法的故障定位准确率高达91％,故障业务相对恢复时延度平均降低了48.83％,恢复路径可靠性平均提高了6.05％.

实际运行经验表明,采用标准中推荐的500 kV并联间隙经常出现保护失效情形.相关研究人员已研制出适用于一般地区的新型500 kV并联间隙,但在高海拔条件下,新型500 kV并联间隙的尺寸参数不能直接采用一般地区的参数.本文在海拔2100 m的特高压工程技术(昆明)国家工程实验室环境下,针对不同串长下不同尺寸参数的并联间隙进行了U50％雷电冲击试验、伏秒特性试验、可见电晕和无线电干扰试验,并进行了保护有效性分析;通过仿真得到了安装并联间隙前后杆塔耐雷性能的变化.研究结果表明,当绝缘子片数分别为33片和37片时,推荐选取的并联间隙电极横向伸出长度分别为800/800 mm、850/850 mm,在安装并联间隙后,单回线路耐雷水平均较安装前降低,但双回线路同时闪络耐雷水平均有所提高,提高幅度分别为11.3％和11.6％.

近年来,随着电信业务用户数量不断增长,全球电信计费方式向着多样化、融合化的方向发展,相关的计费监管政策也发生了调整.首先对当前世界上一些发达国家和地区的三种典型计费监管模式进行了分析,然后对我国电信计费监管体系进行了探讨,并提出进一步强化和完善我国电信计费监管的对策建议.

Telecom network is still in the process of continuous development and evolution, which is par-ticularly prominent in LTE, IMS and Public WLAN areas. This article introduced basic information about these three networks, proposed two general methods for charging test by analyzing the network structure and charging principle. In addition, this article made a forward-looking thinking about billing and charging test in the new patterns of telecom services.

Based on exploring the inherent law and keeping practice,there is thereby forming a clear duties and effective collaboration metering and billing work system in telecom regulation.Nowadays,scientific and effective metering and billing working model has been built in china which are standards first,pilot studying and spreading nationwide step by step.Working mechanism shall be formed gradually to adapt to the telecom technology development.Besides,localized testing methods and testing all points on site are necessary for objective and reasonable metering and billing results.At the same time it is more important to pay attention to development of telecom metering and billing work closely.

Lightning disasters,one of the important reasons that affect the safety and reliability of the communication network operation.The work of communication lightning protection is an important part of communication network safety operation regulation,also in the social public security of government responsibility.This paper expounds the current communication lightning protection management status quo and working situation.Through the analysis of the problems found in the work,ideas are provided in the proposal.

自2000年FCC制定加快发展宽带数据业务和加强本地电话竞争计划以来,美国的宽带接入取得了飞速发展.根据FCC今年初发布的信息,去年上半年,高速互联网(在美国"高速线路"是指单向传输数率超过200kb/S的电路)接入增长了18%,同比增长45%,达到2350万接入线路,其中2060万线用于住宅和小商业用户,增长19%,同比增长48%.在技术应用上,ADSL技术的使用在去年上半年增长了19%,从650万线路增加到770万线路,同比增长达50%.电缆调制解调器业务增长20%,从1140万线增加到1370万线,同比增长49%.伴随高速、宽带接入时代的来临,竞争将进一步促使越来越多的业务价格更加低廉,并在通信业的每个部门创造史无前例的投资增长和就业增长.