1, R16 overview
3GPP R16 link: https://www.3gpp.org/release-16.
R16 timeline change at TSG#87:
*R16 stage 3 delayed to 2020-6
*R16 ASN.1 and OpenAPI stays at 2020-6
Planned milestone of R16:
2, R16 WI Summary
refer to <Work_plan_3gpp_200325_.xlsx>
連結: https://pan.baidu.com/s/1qpvWNkQ44gSXj6IGUN1GSA 提取碼: x4tx
3, 38.300 study
38.300-g10 link: 連結: https://pan.baidu.com/s/1_w6KDY7sBDhj8WYeG6_DVw 提取碼: hdpg
From 38.300-g10 ‘Change History’ section:
(1) RP-86 items:
RP-192944(E///, CMCC): RIM (Remote Interference Management) framework
即TDD網絡中因大氣波導效應導緻的遠端幹擾
RP-192942(E///): Direct data forwarding of 5GC/EPC mobility
(2) RP-87 items (part 1):
RP-200349(QC): Integrated Access and Backhaul (IAB)
即Relay架構。
IAB架構支援NSA和SA組網。
IAB分為IAB-donor和IAB-node；其中IAB-donor為支援IAB功能的gNB，IAB-node支援gNB-DU功能（稱為IAB-DU）和部分UE功能（稱為IAB-MT）。
IAB-node支援級聯。
F1-U協定棧如下（BAP=Backhaul Adaptation Protocol），F1-C協定棧類似：
IAB-MT的協定棧如下：
RP-200347(Intel): NR mobility enhancement
CHO(Conditional Handover): 僅當配置的執行條件滿足時，才觸發HO執行。R16暫不支援基于N2的CHO，即inter-AMF/UPF CHO。
Conditional Handover (CHO): a handover procedure that is executed only when the configured execution condition(s) are met.
與正常HO的差別在于，在切換執行階段，需要評估CHO條件。
8. UE maintains connection with source gNB after receiving CHO configuration, and starts evaluating the CHO execution conditions for the candidate cell(s). If at least one CHO candidate cell satisfies the corresponding CHO execution condition, the UE detaches from the source gNB, applies the stored corresponding configuration for that selected candidate cell, synchronises to that candidate cell and completes the RRC handover procedure by sending RRCReconfigurationComplete message to the target gNB. The UE releases stored CHO configurations after successful completation of RRC handover procedure.
DAPS(Dual Active Protocol Stack) Handover: UE往目标小區RA成功之前保持與source gNB的連接配接。 R16暫不支援FR2到FR2的DAPS切換。
DAPS Handover: a handover procedure that maintains the source gNB connection after reception of RRC message for handover and until releasing the source cell after successful random access to the target gNB.