【資料名稱】：單信令導(dǎo)致掉話(掉話投訴)

【資料作者】：WU

【資料日期】：2012-08-01

【資料語言】：中文

【資料格式】：DOC

【資料目錄和簡介】：

在3GPP的TS25.413協(xié)議中，對于IU釋放的發(fā)起原因，提到一點：在沒有RAB、且Iu連接無數(shù)據(jù)情況下，CN應(yīng)該發(fā)起Iu釋放（The Iu release procedure should also be initiated when there is a period of Iu signalling inactivity with no existing RAB.）
8.5Iu Release
8.5.1General
The purpose of the Iu Release procedure is to enable the CN to release an Iu connection for a particular UE and all UTRAN resources related only to that Iu connection. The procedure uses connection oriented signalling.
The Iu Release procedure can be initiated for at least the following reasons:
- Completion of transaction between the UE and the CN.
- UTRAN-generated reasons, e.g. reception of an IU RELEASE REQUEST message.
- Completion of successful relocation of SRNS.
- Cancellation of relocation after successful completion of a Relocation Resource Allocation procedure.
- Detection of two Iu connections in the same domain toward one UE.
The Iu release procedure should also be initiated when there is a period of Iu signalling inactivity with no existing RAB.
對此，已經(jīng)確定由于交換在RAB釋放后，未及時釋放IU口，導(dǎo)致單信令出現(xiàn)跨RNC失敗出現(xiàn)掉話