Configuration and signaling for UL NOMA operations

Patent metadata

Field	Value
Publication number	US-12363785-B2
Application number	US-202418783247-A
Country	US
Kind code	B2
Filing date	Jul 24, 2024
Priority date	Apr 5, 2018
Publication date	Jul 15, 2025
Grant date	Jul 15, 2025

Abstract

Switching between Orthogonal Multiple Access (OMA) and Non-Orthogonal Multiple Access (NOMA) modes of a user equipment (UE) can be determined and indicated by a gNB to a UE at an RRC connected state using one or more of the following schemes: at an RRC (Radio Resource Control) layer with an RRC configuration message, at a MAC (Medium Access Control) layer with MAC CE (MAC control element) signaling, at a PHY (Physical) layer with DCI (Downlink Control Information) signaling, jointly with RRC configuration and DCI signaling, and/or jointly with RRC configuration and MAC CE signaling. The OMA or NOMA mode that the UE operates after the transition may be requested by the UE, indicated by the gNB, and/or may be based on one or more rules for OMA-NOMA switching.

First claim

What is claimed is:

1. A method performed by a wireless transmit/receive unit (WTRU), the method comprising:
receiving, by the WTRU, while the WTRU is in an RRC connected state, a radio resource control (RRC) release message comprising configuration information indicating one or more configured grant (CG) resources, wherein the configuration information further indicates at least one of: a periodicity, a time allocation, a frequency allocation, a modulation coding scheme, or a transport block size; and
while the WTRU is in an RRC inactive state:
sending, by the WTRU, an uplink (UL) transmission using one of the indicated CG resources, wherein the UL transmission comprises at least an RRC resume request message; and
monitoring, by the WTRU, for a physical downlink control channel transmission including downlink control information using a radio network temporary identifier (RNTI) configured for the RRC inactive state, wherein the RNTI comprises a configured scheduling RNTI.

2. The method of claim 1 , further comprising, upon completion of sending the UL transmission, resuming the RRC inactive state.

3. The method of claim 1 , further comprising receiving, from a base station, an acknowledgement of the UL transmission.

4. A wireless transmit/receive unit (WTRU) configured to:
receive, while the WTRU is in an RRC connected state, a radio resource control (RRC) release message comprising configuration information indicating one or more configured grant (CG) resources, wherein the configuration information further indicates at least one of: a periodicity, a time allocation, a frequency allocation, a modulation coding scheme, or a transport block size; and
while the WTRU is in an RRC inactive state:
send an uplink (UL) transmission using one of the indicated CG resources, wherein the UL transmission comprises at least an RRC resume request message; and
monitor for a physical downlink control channel transmission including downlink control information using a radio network temporary identifier (RNTI) configured for the RRC inactive state, wherein the RNTI comprises a configured scheduling RNTI.

5. The WTRU of claim 4 , wherein upon completion of sending the uplink transmission, the WTRU is configured to resume the RRC inactive state.

6. The WTRU of claim 4 , wherein the WTRU is further configured to receive, from a base station, an acknowledgement of the uplink transmission.

7. The method of claim 1 , wherein the UL transmission further comprises UL data.

8. The method of claim 7 , wherein the UL data is piggybacked with the RRC resume request message.

9. The WTRU of claim 4 , wherein the UL transmission further comprises UL data.

10. The WTRU of claim 9 , wherein the UL data is piggybacked with the RRC resume request message.

Assignees

• Interdigital Patent Holdings Inc

Inventors

• Li Yifan
• Tsai Allan Y
• Iyer Lakshmi R
• Li Qing
• Adjakple Pascal M
• Awadin Mohamed
• Murray Joseph M
• Zhang Guodong

Classifications

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04W80/02

  Data link layer protocols · CPC title

• H04L5/0005

  Time-frequency · CPC title

• H04L1/1664

  the supervisory signal being transmitted together with payload signals; piggybacking · CPC title

• H04W76/19

  Connection re-establishment · CPC title