Configuration and signaling for ul noma operations

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.

Description

BACKGROUND[0001]In LTE, a Non-Orthogonal Multiple Access (NOMA) application is introduced for downlink (DL). The DL NOMA was proposed to 3GPP LTE Rel-13 and a new study item under the name of “downlink multiuser superposition transmission (MUST)” was approved. Later in Rel-14, a work item was established to specify the necessary mechanisms to enable LTE to support downlink intra-cell multi-user superposition transmission for data channels with assistance information from a serving BS (Base Station) to a UE regarding its experienced intra-cell interference.SUMMARY[0002]Disclosed herein are methods and systems for switching between Orthogonal Multiple Access (OMA) and Non-Orthogonal Multiple Access (NOMA) modes of a user equipment (UE). Switching between the OMA and NOMA modes 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...

AI Technical Summary

Benefits of technology

[0002]Disclosed herein are methods and systems for switching between Orthogonal Multiple Access (OMA) and Non-Orthogonal Multiple Access (NOMA) modes of a user equipment (UE). Switching between the OMA and NOMA modes 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. Switching between OMA and NOMA can be requested by a UE at RRC connected state. Switching between OMA and NOMA can be requested by a UE when the UE is transferring from an RRC inactive state to an RRC connected state. 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.

Problems solved by technology

For non-orthogonal multiple access, there may be interference between transmissions using overlapping resources.

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