3 GPP TSG RAN WG 1 NR Adhoc

3 GPP TSG RAN WG 1 NR Ad-hoc Spokane, USA, 16 th – 20 th January 2017 Agenda: 5. 1. 3. 1 R 1 -17 xxxxx WF on 2 -Stage DCI for NR Qualcomm, Huawei, Hi. Silicon, [National Instrument], [AT&T], Vivo, ZTE, Sony, Media. Tek, ….

Background • 2 -stage DL DCI has the benefits of – Control offloading – Higher efficiency in delivery of the 2 nd stage (reuse PDSCH closed loop rate control) – Simplification of UE side blind decoding • Reduce the number of DCI payload sizes – e. NB and UE side Timeline benefit – Forward compatibility • More flexible total DCI length design with fixed 1 st stage DCI length

Proposals • Support 2 -stage DCI for DL grant in NR – 1 st stage of the DCI in the PDCCH region • The size of the 1 st stage DCI is fixed for the UE • Including rank and resource allocation for PDSCH • If 2 nd stage DCI supports multiple sizes for UE, also indicating the payload size (after possible padding) of the 2 nd stage DCI in PDSCH to avoid blind detection • FFS: Other information included in the 1 st stage DCI, such as modulation order – Support 2 nd stage of the DCI in PDSCH region • Including remaining parts of the DCI for the DL grant • FFS if multiple sizes needed for the 2 nd stage DCI for a UE • FFS other downlink control information carried in the 2 nd stage, such as other UL grants and/or (cross slot) DL grants to the same UE – FFS support of 2 nd stage of DCI in PDCCH region