1. 概述..........................................................................................................................................1
2. 理論部分..................................................................................................................................1
2.1一次完整的主叫流程（含切換）.............................................................................................1
2.2一次正常的LAR&RAU信令流程：.........................................................................................2
2.3 各種情況對應的信令................................................................................................................3
2.4常見Disconnect / Release Cause Value:..................................................................................3
2.5 兩個MS通話的流程................................................................................................................4
3. 案例介紹..................................................................................................................................5
3.1 MS呼叫未接通：.......................................................................................................................5
3.2 位置更新導致數(shù)據(jù)吞吐量為0.................................................................................................5
3.3 FTP下載中斷..............................................................................................................................6
3.4 沒有物理消息導致切換失敗....................................................................................................6
3.5 MS呼叫失敗...............................................................................................................................7
3.6 參數(shù)設置錯誤導致切換問題....................................................................................................7
3.7定時器超時， 網(wǎng)絡進行呼叫釋放...........................................................................................7
4. 感謝..........................................................................................................................................8
5. 參考文獻..................................................................................................................................8