Harq feedback for groupcast on new radio uu interface

An apparatus, comprising circuitry configured to:

• configure one or more Radio Network Temporary Identifiers (RNTIs) pertaining to at least one groupcast service or broadcast service,
• wherein the one or more RNTIs includes a first RNTI pertaining to a first groupcast service or broadcast service of the at least one groupcast service or broadcast service;
• transmit, via a Radio Resource Control (RRC) signaling, a first Hybrid Automatic Repeat Request (HARQ) configuration indicating first enabling/disabling information about HARQ for the first RNTI;
• based on the first HARQ configuration indicating enabling, transmit a second HARQ configuration indicating a second enabling/disabling information about HARQ for a first set of transmissions of the first groupcast service or the first broadcast service associated with the first RNTI,
• wherein the second HARQ configuration is received via Downlink Control Information (DCI) signaling
• transmit the first set of transmissions;
• and
• based on the HARQ being enabled for the first set of transmissions of the groupcast service or broadcast service, receive a HARQ feedback for the first set of transmissions;
• and
• based on the HARQ being disabled for the first set of transmissions of the groupcast service or broadcast service, not receive the HARQ feedback for the first set of transmissions,
• wherein whether the HARQ is enabled or disabled for the first groupcast service or broadcast service is determined based on the first HARQ configuration.

A method performed by a network node device, the method comprising:

• configuring one or more Radio Network Temporary Identifiers (RNTIs) pertaining to at least one groupcast service or broadcast service,
• wherein the one or more RNTIs includes a first RNTI pertaining to a first groupcast service or broadcast service of the at least one groupcast service or broadcast service;
• transmitting, via a Radio Resource Control (RRC) signaling, a first Hybrid Automatic Repeat Request (HARQ) configuration indicating first enabling/disabling information about HARQ for the first RNTI;
• based on the first HARQ configuration indicating enabling, transmitting a second HARQ configuration indicating a second enabling/disabling information about HARQ for a first set of transmissions of the first groupcast service or the first broadcast service associated with the first RNTI,
• wherein the second HARQ configuration is received via Downlink Control Information (DCI) signaling
• transmitting the first set of transmissions;
• and
• based on the HARQ being enabled for the first set of transmissions of the groupcast service or broadcast service, receiving a HARQ feedback for the first set of transmissions;
• and
• based on the HARQ being disabled for the first set of transmissions of the groupcast service or broadcast service, not receiving the HARQ feedback for the first set of transmissions,
• wherein whether the HARQ is enabled or disabled for the first groupcast service or broadcast service is determined based on the first HARQ configuration.

A method performed by a mobile node device, the method comprising:

• receiving one or more Radio Network Temporary Identifiers (RNTIs) pertaining to at least one groupcast service or broadcast service,
• wherein the one or more RNTIs includes a first RNTI pertaining to a first groupcast service or broadcast service of the at least one groupcast service or broadcast service;
• receiving, via a Radio Resource Control (RRC) signaling, a first Hybrid Automatic Repeat Request (HARQ) configuration indicating first enabling/disabling information about HARQ for the first RNTI;
• upon detecting the first HARQ configuration indicates enabling, receiving a second HARQ configuration indicating a second enabling/disabling information about HARQ for a first set of transmissions of the first groupcast service or the first broadcast service associated with the first RNTI,
• wherein the second HARQ configuration is received via Downlink Control Information (DCI) signaling;
• receiving the first set of transmissions;
• determine whether the HARQ is enabled or disabled for the first groupcast service or broadcast service based on the second HARQ configuration;
• based on the HARQ being enabled for the first set of transmissions of the groupcast service or broadcast service, transmitting a HARQ feedback for the first set of transmissions;
• and
• based on the HARQ being disabled for the first set of transmissions of the groupcast service or broadcast service, not transmitting the HARQ feedback for the first set of transmissions.