Background For SN initiated inter-SN SCG selective activation: RAN2#121bis agreement: For SN initiated inter-SN SCG selective activation, source SN generates the execution conditions for the initial CPC. RAN2#122 agreement: For SN-initiated SCG

Discussion Issue 1: Execution condition generation for initial CPAC and subsequent CPC Previous agreements: RAN2 #119 agreement: The selective activation of cell groups should correspond to support of subsequent conditional changes (CPC) af

Background   Objective from WID (RP-221799): To allow subsequent cell group change after changing CG without reconfiguration and re-initiation of CPC/CPA [RAN2, RAN3, RAN4]. RAN2 #119 agreement: The selective activation of cell g

我們知道Handover的需求往往起因於UE與serving (source) cell間的無線鏈路信號品質下降，不同於傳統的Normal Handover (NHO)，Conditional Handover (CHO)透過由source cell提早發送換手配置給UE，來避免因UE與source cell間的無線鏈路信號品質已下降而無法成功傳達換手配置訊息，以提高換手程序的可靠度。既然是「提早」發送配置，那就意謂著UE收到CHO的換手配置時，不需「立即」執行，而是根據伴隨CHO的換手配置一

Rel-17 NR CPAC is specified in 3GPP TS 38.331 Section 5.3.5.13 Conditional Reconfiguration including the following sub-sections: 5.3.5.13.1  General  5.3.5.13.2  Conditional reconfiguration removal  5.3.5.13.3  Con

Rel-17 NR CPAC (Conditional PSCell Change/Addition) includes: Conditional NR PSCell addition (CPA) MN initiated inter-SN conditional NR PSCell change (CPC) SN initiated inter-SN conditional NR PSCell change (CPC) Rel-17 NR CPAC is spe

Scope: Inter-node messages in SN-initiated inter-SN CPC preparation: Inter-node messages in MN-initiated inter-SN CPC and CPA preparation:   Previous related agreements made in 3GPP : In order to exchange per-PSCell parameter b

I.次細胞群組失效資訊流程(SCG failure information procedure)簡介： 次細胞群組(Secondary Cell Group, SCG)失效資訊流程旨在送出SCG失效資訊向網路端通報用戶設備(User Equipment, UE)經歷的SCG失效，例如SCG無線鏈路失效(Radio Link Failure, RLF)，以使網路端提供配置，例如SCG更換，來做處置。 在SCG失效資訊被送出之前，SCG失效資訊流程的初始化包括SCG媒體存取控制(Media A

在Dual Connectivity (DC)架構下，我們有Master Node (MN)及Secondary Node (SN)，其中SN的變換程序可以由MN或SN起始。除了User Equipment (UE)之外，在此程序中，還有以下radio access network (RAN)端的entities被involve在裡面，包括：MN、source SN及target SN。         無論是由

　　不同於legacy handover (HO)，在Conditional Handover (CHO) 程序中，source cell會「提前」將CHO configuration送給UE，以降低因radio quality變差而導致CHO configuration無法成功送達的風險。也就是說，UE不會在收到CHO configuration的「當下」就立即進行handover execution，而是依循攜帶在CHO configuration中的execution condition