【资料名称】：Synchronization in F-DPCH

【资料作者】：佚名

【资料日期】：2011

【资料语言】：英文

【资料格式】：PPT

【资料目录和简介】：

The DCH Frame protocol insure a CFN synchronization between NodeB and RNC
The HS-DSCH FP or E-DCH FP are non-synchronized Frame protocol
Nevertheless, optimization of the delta CFN shows that the UE critical path is longer than the NodeB critical path
What is missing at user-plane level is half of the round trip delay between the NodeB and the RNC. It is evaluated at each E-DCH Data frame. Time drifting may happen during silent period.
Define per configuration a IUB round trip delay
~100ms suitable for all Iub?
A parameter per Iub link?
Use it only as an extra margin?
Use un-synchronize reconfigurations
May also help for traffic latency during mobility
But study to be done and probably a higher DE
Use also DRT to guess the RTD
Introduce in 3GPP the usage of DL Node synchronization even for HS-DSCH and E-DCH frame protocol