看你的圖應該是T313啟動后停止功率發(fā)射的
第二問題我這是貝爾的資料，估計愛立信功能也類似，涉及的過程是3GPP規(guī)范的
This section describes the 34290 “RRC Connection Re-establishment” feature which will allow
the Alcatel-Lucent UTRAN capable of re-establishing RRC connection due to cell update with
AM RLC unrecoverable error or due to UL/DL Radio Link Failure.
This feature support the re-establishment for the following service: single CS RAB, single PS
RAB, or multi-RAB PS+PS or PS+CS or PS+PS+CS is mapped to DCH, HS-DSCH, or E-DCH.
This feature can reduce the possibility to drop the call due to radio link failure or AM RLC
unrecoverable error.
The main benefits are:
• Re-establish the RRC connection of UEs that temporarily go out of coverage or
this is especially beneficial to users on calls whilst traveling through tunnels etc,
the call will not drop. The user will not have to re-dial
• Have an Efficient PS session resuming when temporarily loosing coverage.
The feature “RRC Connection Re-establishment” will be controlled through the 2 OAM
parameters:
• isCSRrcReestablishAllowed controls the CS support for RRC Re-establishment
• isPSRrcReestablishAllowed controls the PS support for RRC Re-establishment
• isPSRrcReestablishforICFailureAllowed controls PS re-establishment for a UE
bug which causes the R5 UE to send invalid configuration during UL data rate
changes.
When both parameters isCSRrcReestablishAllowed and isPSRrcReestablishAllowed are set to
False, the RRC Re-establishment feature is deactivated.
重建過程中還涉及這兩個計時器T314和T315
T314 & T315 are guard timers during which the UE keeps the RABs following radio link failure
until they expire or the cell update procedure has been completed. During this time, the RNC
can try to re-establish the UE so that the user traffic can resume. When T314 and / or T315
expire, the UE releases the associated RABs.