3GPP R16 Track Report (1)

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

链接: https://pan.baidu.com/s/1qpvWNkQ44gSXj6IGUN1GSA 提取码: x4tx

3, 38.300 study

38.300-g10 link: 链接: https://pan.baidu.com/s/1_w6KDY7sBDhj8WYeG6_DVw 提取码: hdpg

From 38.300-g10 ‘Change History’ section:

(1) RP-86 items:

RP-192944(E///, CMCC): RIM (Remote Interference Management) framework

即TDD网络中因大气波导效应导致的远端干扰

 

​​​​​​​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框架。

IAB框架支持NSA和SA组网。

IAB分为IAB-donor和IAB-node；其中IAB-donor为支持IAB功能的gNB，IAB-node支持gNB-DU功能（称为IAB-DU）和部分UE功能（称为IAB-MT）。

IAB-node支持级联。

F1-U协议栈如下（BAP=Backhaul Adaptation Protocol），F1-C协议栈类似：

IAB-MT的协议栈如下：

 

​​​​​​​RP-200347(Intel): NR mobility enhancement

CHO(Conditional Handover): 仅当配置的执行条件满足时，才触发HO执行。R16暂不支持基于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.

与常规HO的区别在于，在切换执行阶段，需要评估CHO条件。

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往目标小区RA成功之前保持与source gNB的连接。 R16暂不支持FR2到FR2的DAPS切换。

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.