【正文】 新增 R9和 R10協(xié)議不兼容導(dǎo)致切換失敗問題案例 大唐移動(dòng)通信設(shè)備有限公司 TDLTE 網(wǎng)優(yōu) KPI 指標(biāo)優(yōu)化工作指導(dǎo)手冊 第 3 頁 共 86 頁 目 錄 1 前 言 ........................................................................................................................... 5 2 KPI 優(yōu)化的工作流程及內(nèi)容 .......................................................................................... 5 KPI 優(yōu)化工作總體流程 ................................................................................ 5 KPI 優(yōu)化工作內(nèi)容 ....................................................................................... 6 KPI 數(shù)據(jù)生成 ....................................................................................... 6 KPI 數(shù)據(jù)分析 ....................................................................................... 7 問題處理 .............................................................................................. 7 問題跟蹤和核查 ................................................................................... 8 KPI 優(yōu)化工作邏輯圖 .................................................................................... 8 KPI 優(yōu)化工作模板和示例 ............................................................................. 9 3 RRC 連接建立成功率優(yōu)化 .......................................................................................... 10 理論介紹 ................................................................................................... 10 指標(biāo)定義 ................................................................................................... 10 CDL 信令流程及失敗原因 ............................................................................11 正常過程 .............................................................................................11 異常過程 .............................................................................................11 優(yōu)化方法介紹 ............................................................................................ 12 上行隨機(jī)接入的問題 .......................................................................... 14 小區(qū)重選參數(shù)問題 .............................................................................. 14 下行初始發(fā)射功率偏低問題 ................................................................ 15 上行初始功控問題 .............................................................................. 15 相關(guān)案例介紹分析 ..................................................................................... 15 小區(qū)重選參數(shù)問題 .............................................................................. 15 小區(qū)上行功控參數(shù)設(shè)置問題 ................................................................ 17 小區(qū)測試開關(guān)參數(shù)問題 ....................................................................... 19 全頻帶高干擾導(dǎo)致接入失敗問題 ......................................................... 21 4 ERAB 建立成功率 ...................................................................................................... 23 理論介紹 ................................................................................................... 23 指標(biāo)定義 ................................................................................................... 25 CDL 信令流程及失敗原因 ........................................................................... 25 正常過程 ............................................................................................ 25 異常過程 ............................................................................................ 26 相關(guān)案例介紹分析 ..................................................................................... 29 路由關(guān)系未配無法接入的問題 ............................................................ 29 網(wǎng)關(guān) IP 配置錯(cuò)誤導(dǎo)致無法附著 .......................................................... 30 安全參數(shù)配置問題 .............................................................................. 32 資源受限導(dǎo)致上下文建立失敗 ............................................................ 33 5 切換成功率優(yōu)化 .......................................................................................................... 35 理論介紹 ................................................................................................... 35 大唐移動(dòng)通信設(shè)備有限公司 TDLTE 網(wǎng)優(yōu) KPI 指標(biāo)優(yōu)化工作指導(dǎo)手冊 第 4 頁 共 86 頁 指標(biāo)定義 ................................................................................................... 35 CDL 信令流程 ............................................................................................ 36 正常過程 ............................................................................................ 36 優(yōu)化方法介紹 ............................................................................................ 38 切換信令流程 ..................................................................................... 38 涉及話統(tǒng)打點(diǎn) ..................................................................................... 40 切換問題分類 ..................................................................................... 42 相關(guān)案例介紹分析 ..................................................................................... 45 切換目標(biāo)側(cè)準(zhǔn)備失敗 .......................................................................... 45 切換算法參數(shù)配置不當(dāng) ....................................................................... 46 小區(qū)個(gè)性偏移參數(shù)調(diào)整案例 ................................................................ 48 切換時(shí)終端接入到非源和目標(biāo)小區(qū)導(dǎo)致核 心網(wǎng)釋放用戶問題 ............... 49 鄰區(qū)移動(dòng)網(wǎng)絡(luò)碼配置錯(cuò)誤導(dǎo)致 S1 切換失敗 ......................................... 52 開啟防乒乓切換開關(guān)導(dǎo)致不切換 ......................................................... 54 配置垃圾鄰區(qū)導(dǎo)致只上報(bào) MR 不觸發(fā)切換 ............................................ 58 終端發(fā) A3 切換測量報(bào)告后，不觸發(fā)異頻切換 ..................................... 61 R9 和 R10 協(xié)議不兼容導(dǎo)致切換失敗問題 ............................................. 63 6 無線掉線率優(yōu)化 .......................................................................................................... 65 理論介紹 ................................................................................................... 65 指標(biāo)定義 .........................................................................