【资料名称】：wcdma RU20 介绍

【资料作者】：NSN

【资料日期】：2012

【资料语言】：中文

【资料格式】：DOC

【资料目录和简介】：

文章主要介绍了RU20的相关Feature,以及RU20和以前的RU10对比有了哪些的改善Fast L1 synchronization is 3GPP change to the release 6 version of the specification, i.e. only applicable to Rel6 and newer UEs
Fast L1 synchronization reduce connection establishment time by allowing the UE start transmitting sooner
UE start to transmit as soon as downlink chip and frame synchronization has been achieved rather than waiting until after N312 in-sync primitives has been generated.
Benefit of reduced connection establishment delay (at least 40ms)
Potential drawback of transmitting when synchronization is unreliable.
Feature is applicable to:
RRC connection establishment
RRC State Transition from CELL_FACH to CELL_DCH
Hard Handovers
Feature is activated with parameter PostVerifPeriodDLSync and by default it is Enabled (1)