【資料名稱】： GPRS網(wǎng)絡優(yōu)化

【資料作者】：愛立信

【資料日期】：2001年

【資料語言】：中文

【資料格式】：其它

【資料目錄和簡介】：

1引言........................................................................................................................................................................4
1.1 GPRS網(wǎng)絡優(yōu)化的引入......................................................................................................................................4
1.2 GPRS核心網(wǎng)絡優(yōu)化主要內容..........................................................................................................................4
1.3 GPRS無線網(wǎng)絡優(yōu)化主要內容..........................................................................................................................4
1.4 GPRS網(wǎng)絡優(yōu)化方法..........................................................................................................................................5
2愛 GPRS 立信 重要性能指標..................................................................................................................................7
2.1 GPRS核心網(wǎng)絡重要性能指標..........................................................................................................................7
2.1.1平均附著用戶數(shù).......................................................................................................................................7
2.1.2 GPRS附著成功率.....................................................................................................................................7
2.1.3 SGSN內路由區(qū)更新成功率......................................................................................................................9
2.1.4 SGSN間路由區(qū)更新成功率....................................................................................................................10
2.1.5路由區(qū)更新成功率.................................................................................................................................12
2.1.6 PDP 激活的 上下文激活用戶數(shù)..............................................................................................................13
2.1.7 PDP上下文激活成功率.........................................................................................................................13
2.1.8分組尋呼成功率.....................................................................................................................................15
2.1.9 SGSN Gb 上行流量.................................................................................................................................17
2.1.10 SGSN Gb 下行流量............................................................................................................................17
2.1.11 GGSN Gi 上行流量............................................................................................................................18
2.1.12 GGSN Gi 下行流量............................................................................................................................18
2.2 GPRS無線網(wǎng)絡重要性能指標........................................................................................................................18
2.2.1分組業(yè)務隨機接入.................................................................................................................................18
2.2.2 PDCH分配嘗試次數(shù)..............................................................................................................................19
2.2.3 PDCH分配失敗率..................................................................................................................................19
2.2.4 PCU PDCH 引起的 分配失敗次數(shù)...........................................................................................................19
2.2.5 PDCH預清空次數(shù)..................................................................................................................................19
2.2.6 PDCH 小區(qū)中平均分配 個數(shù)..................................................................................................................20
2.2.7 PDCH (ALLPDCHACTACC) 小區(qū)中平均激活 個數(shù) ...............................................................................20
2.2.8 PDCH 激活 個數(shù)峰值..............................................................................................................................20
2.2.9 RLC層下行數(shù)據(jù)包重傳率......................................................................................................................20
2.2.10 RLC層上行數(shù)據(jù)包重傳率..................................................................................................................21
2.2.11 PCU 丟棄的下行 幀幀數(shù).....................................................................................................................21
2.2.12 PCU 丟棄的上行 幀幀數(shù).....................................................................................................................21
2.2.13分組尋呼次數(shù).....................................................................................................................................22
3 GPRS 愛立信 網(wǎng)絡參數(shù)調整................................................................................................................................23
3.1 NS控制層.........................................................................................................................................................23
3.1.1 NSVC Block/UnBlock周期......................................................................................................................23
3.1.2 NSVC復位周期定時器...........................................................................................................................23
3.1.3 NSVC復位過程定時器...........................................................................................................................23
3.1.4 NSVC測試定時器...................................................................................................................................23
3.1.5 FrameRelay 數(shù)據(jù)包通過 網(wǎng)的時間..........................................................................................................24
3.1.6 NS控制層參數(shù)列表.................................................................................................................................24
3.2 BSSGP 層.........................................................................................................................................................24
3.2.1流量控制消息定時器.............................................................................................................................24
3.2.2 BVC復位控制定時器..............................................................................................................................25
3.2.3 BVC復位定時器......................................................................................................................................25
3.2.4 BSSGP層參數(shù)列表.................................................................................................................................26
3.3 SNDCP層.........................................................................................................................................................26
3.3.1延遲級別權重.........................................................................................................................................26
3.3.2吞吐量級別權重.....................................................................................................................................26
3.3.3 1234PDU 延時級別為，，，的 保持時間.............................................................................................27
3.3.4 PDP上下文包隊列長度.........................................................................................................................27
3.3.5 SNDCP層參數(shù)列表.................................................................................................................................28
3.4 GMM層............................................................................................................................................................28
3.4.1移動可達定時器.....................................................................................................................................28
3.4.2 READY定時器.........................................................................................................................................29
3.4.3 SNDCP層參數(shù)列表.................................................................................................................................29
3.5計費..................................................................................................................................................................29
3.5.1 PDP上下文數(shù)據(jù)閾值.............................................................................................................................29
3.5.2 CDR產(chǎn)生時間.........................................................................................................................................30
3.5.3 CDR緩沖輸出時間.................................................................................................................................30
3.5.4計費參數(shù)列表.........................................................................................................................................30
3.6 GN接口參數(shù).....................................................................................................................................................31
3.6.1 GTP建立請求響應時間..........................................................................................................................31
3.6.2 GTP建立請求次數(shù)..................................................................................................................................31
3.6.3 GTP更新請求響應時間..........................................................................................................................31
3.6.4 GTP更新請求次數(shù)..................................................................................................................................32
3.6.5 GTP刪除響應時間..................................................................................................................................32
3.6.6 GTP刪除請求次數(shù)..................................................................................................................................32
3.6.7 GTP識別響應時間..................................................................................................................................32
3.6.8 GTP識別請求次數(shù)..................................................................................................................................33
3.6.9 SGSN上下文請求響應時間....................................................................................................................33
3.6.10 SGSN上下文請求次數(shù).......................................................................................................................33
3.6.11 Gn接口參數(shù)列表................................................................................................................................33
3.7無線部分參數(shù)..................................................................................................................................................34
3.7.1網(wǎng)絡運行模式.........................................................................................................................................34
3.7.2 GPH 動態(tài) 設備保留數(shù).............................................................................................................................34
3.7.3 GPRS優(yōu)先級...........................................................................................................................................35
3.7.4 PDCH空閑時鐘......................................................................................................................................35
3.7.5編碼方式.................................................................................................................................................35
3.7.6 TBF 下行 共享限制..................................................................................................................................35
3.7.7 TBF 上行 共享限制..................................................................................................................................36
3.7.8 MS功率減少等級....................................................................................................................................36
3.7.9 BTS預期接收信號強度...........................................................................................................................36
3.7.10 PDCH 專有 數(shù)量..................................................................................................................................37
3.7.11 PDCHALLOC .....................................................................................................................................37
3.7.12無線部分參數(shù)列表.............................................................................................................................37
4常見問題分析......................................................................................................................................................38
4.1 GPRS附著失敗................................................................................................................................................38
4.1.1 GPRS附著請求被拒絕的原因................................................................................................................38
4.1.2 MS GPRS 在 側造成 附著失敗的情況......................................................................................................38
4.1.3 GPRS 在網(wǎng)絡側造成 附著失敗情況........................................................................................................39
4.1.4 GPRS 解決 附著失敗的方法....................................................................................................................40
4.2 PDP上下文激活失敗.......................................................................................................................................40
4.2.1 MS PDP 發(fā)起的 上下文激活失敗的原因................................................................................................40
4.2.2 PDP 網(wǎng)絡發(fā)起 上下文去激活的原因......................................................................................................40
4.2.3 PDP 常見的 上下文激活失敗原因..........................................................................................................41
4.2.4 PDP 解決 上下文激活失敗問題的建議..................................................................................................41
4.3無線部分..........................................................................................................................................................41
4.3.1 PING丟包率較高....................................................................................................................................41
4.3.2 RLC層速率低..........................................................................................................................................41

Figure 1， 網(wǎng)絡優(yōu)化服務流程6