RAN WG1
A list of work items can be found here
Study on channel model for frequencies from 0.5 to 100 GHz, 3GPP and outside 3GPP
RAN WG2
A list of work items can be accessed here
1/ Study Item: Enhanced Industrial Internet of Things (IoT) and ultra-reliable and low latency communication (URLLC) support for NR
+ Physical Layer feedback enhancements [RAN1]
+ Uplink enhancements for URLLC in unlicensed controlled environments [RAN1, RAN2]
+ Intra-UE multiplexing and prioritization of traffic with different priority based on work done in Rel.16 [RAN1]
+ Enhancements for support of time synchronization (TSN)
+ RAN enhancements based on new QoS-related parameters if any, e.g. survival time, burst spread, decided in SA2. [RAN2, RAN3]
2/ Study on integrated access and backhaul for NR (38 874)
+ source: https://portal.3gpp.org/ngppapp/CreateTdoc.aspx?mode=view&contributionUid=RP-182329