深圳广电iptv质量监测平台测试方案书可行性评估报告.doc

selectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopointselectionparagraaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestselectionparbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbagraphfolinespacinglinestopointsselectionparagraphformatlinespacinglinestopointse11111111111111111111111111111111lectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopoctionparagraphformatlinespaci2222222222222222222222nglinestopoints2selectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopointselectionparagraphfccccccccccccccccccccccccccccccccccccccccccccccccccccccccormatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopoctionparagraselec selectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopointselectionparagraaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaphformatlinespacinglinestopointsselectionparagraphformatlinespac inglinestselectionparbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbagraphfolinespacinglinestopointsselectionparagraphformatlinespacinglinestopointse11111111111111111111111111111111lectionparagraphformatlinespaci nglinestopointsselectionparagraphformatlinespacinglinestopoctionparagraphformatlinespaci2222222222222222222222nglinestopoints2selectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopoints electionparagraphfccccccccccccccccccccccccccccccccccccccccccccccccccccccccormatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopoctionparagraselec 深圳广播电影电视集团 第 1 页赛特斯网络科技有限公司 selectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopointselectionparagraaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestselectionparbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbagraphfolinespacinglinestopointsselectionparagraphformatlinespacinglinestopointse11111111111111111111111111111111lectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopoctionparagraphformatlinespaci2222222222222222222222nglinestopoints2selectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopointselectionparagraphfccccccccccccccccccccccccccccccccccccccccccccccccccccccccormatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopoctionparagraselec 目目 录录 1 1、iptviptv 服务质量保障系统说明服务质量保障系统说明 4 4 2 2、系统功能简介、系统功能简介4 4 3 3、预防性客观指标、预防性客观指标5 5 3.1 机顶盒.5 3.2 视频信息.5 4 4、用户行为分析、用户行为分析1111 4.1、开机行为分析 11 4.1.1、指定时间跨度的开机状况统计.11 4.1.2、指定时间跨度的新增用户状况统计.11 4.1.3、24 小时内收视时段的开机状况统计 12 4.1.4、指定时间跨度的沉睡用户挖掘.12 4.2、收视统计分析 13 4.2.1、直播频道收视统计.13 4.2.2、直播频道节目收视统计.14 4.2.3、点播节目频道收视统计.15 4.2.4、栏目/回看收视统计17 4.3、分权分域管理 20 4.3.1、分权管理.20 selectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopointselectionparagraaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestselectionparbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbagraphfolinespacinglinestopointsselectionparagraphformatlinespacinglinestopointse11111111111111111111111111111111lectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopoctionparagraphformatlinespaci2222222222222222222222nglinestopoints2selectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopointselectionparagraphfccccccccccccccccccccccccccccccccccccccccccccccccccccccccormatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopoctionparagraselec selectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopointselectionparagraaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaphformatlinespacinglinestopointsselectionparagraphformatlinespac inglinestselectionparbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbagraphfolinespacinglinestopointsselectionparagraphformatlinespacinglinestopointse11111111111111111111111111111111lectionparagraphformatlinespaci nglinestopointsselectionparagraphformatlinespacinglinestopoctionparagraphformatlinespaci2222222222222222222222nglinestopoints2selectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopoints electionparagraphfccccccccccccccccccccccccccccccccccccccccccccccccccccccccormatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopoctionparagraselec 深圳广播电影电视集团 第 2 页赛特斯网络科技有限公司 4.3.2、分域管理.21 4.4、用户行为分析以及习惯挖掘 21 4.4.1、用户行为习惯喜好挖掘.21 4.4.2、根据用户行为习惯进行用户分类.21 5 5、统一网络管理、统一网络管理2222 5.1、arp 欺骗检测.22 5.2、流量统计与分析 22 5.3、数据路由的优化 22 5.4、应用系统的监控 23 5.4.1、数据库监控.23 5.4.2、中间件监控.23 5.5、网络路由展现 24 5.6、资产管理 25 5.7、数据中心环境管理 25 6 6、深圳广电、深圳广电 iptviptv 服务质量保障系统测试方案服务质量保障系统测试方案2525 6.1、部署方案 25 6.2、测试环境架构 26 6.3、测试计划 26 6.4、深圳广电测试配合 27 6.5、深圳广电测试阶段表 29 7 7、深圳广电测试方案系统组成、深圳广电测试方案系统组成2929 selectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopointselectionparagraaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestselectionparbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbagraphfolinespacinglinestopointsselectionparagraphformatlinespacinglinestopointse11111111111111111111111111111111lectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopoctionparagraphformatlinespaci2222222222222222222222nglinestopoints2selectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopointselectionparagraphfccccccccccccccccccccccccccccccccccccccccccccccccccccccccormatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopoctionparagraselec selectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopointselectionparagraaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaphformatlinespacinglinestopointsselectionparagraphformatlinespac inglinestselectionparbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbagraphfolinespacinglinestopointsselectionparagraphformatlinespacinglinestopointse11111111111111111111111111111111lectionparagraphformatlinespaci nglinestopointsselectionparagraphformatlinespacinglinestopoctionparagraphformatlinespaci2222222222222222222222nglinestopoints2selectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopoints electionparagraphfccccccccccccccccccccccccccccccccccccccccccccccccccccccccormatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopoctionparagraselec 深圳广播电影电视集团 第 3 页赛特斯网络科技有限公司 1 1、iptviptv 服务质量保障系统说明服务质量保障系统说明 iptv 服务质量保障系统通过在 iptv 机顶盒上部署视频质量监 控模块，对 iptv 业务进行不间断监测，同时根据需要在不同地方对 直播频道的视频质量进行实时监控，在用户收看 iptv 业务出现异常 时进行告警并从机顶盒侧、网络侧、视频源、数据中心四个方面进 selectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopointselectionparagraaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestselectionparbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbagraphfolinespacinglinestopointsselectionparagraphformatlinespacinglinestopointse11111111111111111111111111111111lectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopoctionparagraphformatlinespaci2222222222222222222222nglinestopoints2selectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopointselectionparagraphfccccccccccccccccccccccccccccccccccccccccccccccccccccccccormatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopoctionparagraselec selectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopointselectionparagraaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaphformatlinespacinglinestopointsselectionparagraphformatlinespac inglinestselectionparbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbagraphfolinespacinglinestopointsselectionparagraphformatlinespacinglinestopointse11111111111111111111111111111111lectionparagraphformatlinespaci nglinestopointsselectionparagraphformatlinespacinglinestopoctionparagraphformatlinespaci2222222222222222222222nglinestopoints2selectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopoints electionparagraphfccccccccccccccccccccccccccccccccccccccccccccccccccccccccormatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopoctionparagraselec 深圳广播电影电视集团 第 4 页赛特斯网络科技有限公司 行故障定位。此外，系统从用户端及业务平台侧进行各种汇总统计 并自动生成各种报表，帮助更充分的了解 iptv 网络现状，包括用户 侧的体验感受、业务平台的运行状况和用户行为的分析。 2 2、系统功能简介、系统功能简介 系统实现对 iptv 业务的 724 h 不间断的监测，覆盖了整个 iptv 网络的各个环节，包括媒体服务器、核心路由器、接入层设备 等，列举部分具体功能如下： 视频质量监测 对当前机顶盒播放视频的质量进行监测，包括组播和单播 对机顶盒 cpu、内存及带宽等进行实施监测 根据系统设置的门限值，在视频质量下降达到门限值时主动发起 视频质量告警 根据用户设定，对机顶盒通过定期、采样方式获取视频质量信息 网络监测及故障定位 汇总机顶盒上报告警信息，精确到每级设备（bas、汇聚交换机、 dslam 等） 自动进行告警故障定位 监控网络设备 cpu、流量等 selectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopointselectionparagraaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestselectionparbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbagraphfolinespacinglinestopointsselectionparagraphformatlinespacinglinestopointse11111111111111111111111111111111lectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopoctionparagraphformatlinespaci2222222222222222222222nglinestopoints2selectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopointselectionparagraphfccccccccccccccccccccccccccccccccccccccccccccccccccccccccormatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopoctionparagraselec selectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopointselectionparagraaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaphformatlinespacinglinestopointsselectionparagraphformatlinespac inglinestselectionparbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbagraphfolinespacinglinestopointsselectionparagraphformatlinespacinglinestopointse11111111111111111111111111111111lectionparagraphformatlinespaci nglinestopointsselectionparagraphformatlinespacinglinestopoctionparagraphformatlinespaci2222222222222222222222nglinestopoints2selectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopoints electionparagraphfccccccccccccccccccccccccccccccccccccccccccccccccccccccccormatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopoctionparagraselec 深圳广播电影电视集团 第 5 页赛特斯网络科技有限公司 故障定位信息通过短信或 email 通知相关人员 媒体播放源监测 对媒体播放源进行监测，在视频源异常时进行告警通知 具备远程视频回传功能，在发现视频源异常时可远程查看视频故 障现象 各类统计及报表自动生成 对承载网络各级设备的网络性能进行汇总，帮助对系统网络进行 优化 对视频质量进行汇总，生成视频质量历史曲线图，了解视频质量 波动情况 对用户开关及收视情况进行统计，帮助了解现网用户使用习惯 3 3、预防性客观指标、预防性客观指标 3.13.1 机顶盒机顶盒 参数注释 视频质量得分 mos(1-5)量化的综合视频质量结果。值范 围为 1-5，5 表示视频质量最好。 状态 信息 网络传输质量 vstq (0- 网络传输质量的量化结果，值越 selectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopointselectionparagraaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestselectionparbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbagraphfolinespacinglinestopointsselectionparagraphformatlinespacinglinestopointse11111111111111111111111111111111lectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopoctionparagraphformatlinespaci2222222222222222222222nglinestopoints2selectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopointselectionparagraphfccccccccccccccccccccccccccccccccccccccccccccccccccccccccormatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopoctionparagraselec selectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopointselectionparagraaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaphformatlinespacinglinestopointsselectionparagraphformatlinespac inglinestselectionparbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbagraphfolinespacinglinestopointsselectionparagraphformatlinespacinglinestopointse11111111111111111111111111111111lectionparagraphformatlinespaci nglinestopointsselectionparagraphformatlinespacinglinestopoctionparagraphformatlinespaci2222222222222222222222nglinestopoints2selectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopoints electionparagraphfccccccccccccccccccccccccccccccccccccccccccccccccccccccccormatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopoctionparagraselec 深圳广播电影电视集团 第 6 页赛特斯网络科技有限公司 50) 大传输质量越好。值范围为 0- 50。 丢包影响因子 loss(0- 10) 网络丢包对视频质量下降的影响 程度，值越大影响越大。取值范 围为 0-10 编码影响因子 codecquant (0-10) 视频编码压缩格式对视频质量的 影响程度，值越大影响越大。取 值范围为 0-10 mdi 延迟因素 mdi_df (秒) 网络的抖动和延时对应用层数据 的影响 mdi 丢包率 mdi_mlr (ts 包/秒) 网络丢包和乱序对应用层数据的 影响 3.3.2 2 视频信息视频信息 参数注释 视频流源 ip 地址 视频流源 ip 地址当前视频流统 计 视频流目标 ip视频流目标 ip 地址 selectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopointselectionparagraaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestselectionparbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbagraphfolinespacinglinestopointsselectionparagraphformatlinespacinglinestopointse11111111111111111111111111111111lectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopoctionparagraphformatlinespaci2222222222222222222222nglinestopoints2selectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopointselectionparagraphfccccccccccccccccccccccccccccccccccccccccccccccccccccccccormatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopoctionparagraselec selectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopointselectionparagraaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaphformatlinespacinglinestopointsselectionparagraphformatlinespac inglinestselectionparbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbagraphfolinespacinglinestopointsselectionparagraphformatlinespacinglinestopointse11111111111111111111111111111111lectionparagraphformatlinespaci nglinestopointsselectionparagraphformatlinespacinglinestopoctionparagraphformatlinespaci2222222222222222222222nglinestopoints2selectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopoints electionparagraphfccccccccccccccccccccccccccccccccccccccccccccccccccccccccormatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopoctionparagraselec 深圳广播电影电视集团 第 7 页赛特斯网络科技有限公司 地址 视频流开始时 间 视频流开始时间 视频流持续时 间 视频流持续时间 视频流 codec视频流编码格式 视频流传输协 议 视频流传输协议 gop 结构图像块组结构(例如：ibbp)(自动检 测*) gop 长度(当前 值/平均值/最 大值) 图像块组中的当前/平均/最大帧数 目(自动检测*) 视频流帧分辨 率 像素级别的帧大小(x*y)(自动检测 *) 视频流帧速率每秒的帧数 每 i 帧的切 片数 每 i 帧的切片数 selectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopointselectionparagraaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestselectionparbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbagraphfolinespacinglinestopointsselectionparagraphformatlinespacinglinestopointse11111111111111111111111111111111lectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopoctionparagraphformatlinespaci2222222222222222222222nglinestopoints2selectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopointselectionparagraphfccccccccccccccccccccccccccccccccccccccccccccccccccccccccormatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopoctionparagraselec selectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopointselectionparagraaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaphformatlinespacinglinestopointsselectionparagraphformatlinespac inglinestselectionparbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbagraphfolinespacinglinestopointsselectionparagraphformatlinespacinglinestopointse11111111111111111111111111111111lectionparagraphformatlinespaci nglinestopointsselectionparagraphformatlinespacinglinestopoctionparagraphformatlinespaci2222222222222222222222nglinestopoints2selectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopoints electionparagraphfccccccccccccccccccccccccccccccccccccccccccccccccccccccccormatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopoctionparagraselec 深圳广播电影电视集团 第 8 页赛特斯网络科技有限公司 i 帧的平均间 隔 i 帧的平均间隔(不包括 i 帧) 参考时钟频率程序参考时钟(pcr)(hz) 分组数目：接 收 接收到的分组数目 分组数目：丢 失 丢失的分组数目 分组数目：废 弃 由于缓冲器抖动而废弃的分组数目 分组数目：失 序 接收到的失序的分组数目 分组数目：重 复 接收到的重复的分组数目 分组数目：纠 正 纠正的分组数目 视频流传输 突发度量：数 目/平均长度/ 密度 发生显著分组丢失或废弃的突发时 段数目/突发时段的平均长度/突发 时段内丢失分组数目的比例 selectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopointselectionparagraaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestselectionparbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbagraphfolinespacinglinestopointsselectionparagraphformatlinespacinglinestopointse11111111111111111111111111111111lectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopoctionparagraphformatlinespaci2222222222222222222222nglinestopoints2selectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopointselectionparagraphfccccccccccccccccccccccccccccccccccccccccccccccccccccccccormatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopoctionparagraselec selectionparagraphformatlinespacinglinestopointsselectionparagraphformatlinespacinglinestopointselectionparagraaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaphformatlinespacinglinestopointsselectionparagraphformatlinespac inglinestselectionparbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbagraphfolinespacinglinestopointsselectionparagraphformatlinespacinglinestopointse11