Triggered hybrid automatic repeat request acknowledgement reporting for downlink semi-persistent scheduling data transmission

An apparatus, comprising at least one processor and at least one memory including computer program code, wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to:

• receive, from a network entity, a first downlink (DL) control signal activating semi-persistent scheduling (SPS) of a first set of downlink data transmissions, the downlink control signal indicating an applicable hybrid automatic repeat request (HARQ) feedback timing for the first set of downlink data transmissions;
• receive one or more of the first set of downlink data transmissions;
• determine that an applicable HARQ feedback timing for a second set of downlink data transmission received with an inapplicable HARQ feedback timing has not been provided, the second set of downlink data transmissions being received prior to the one or more of the first set of downlink data transmissions;
• and
• in response to the determination, determine a HARQ feedback timing for the one or more of the first set of downlink data transmissions based on a second downlink control signal indicative of an applicable HARQ feedback timing received after reception of the one or more of the first set of downlink data transmissions.

A non-transitory, computer-readable medium comprising program instructions stored thereon for causing an apparatus to:

• receive, from a network entity, a first downlink (DL) control signal activating semi-persistent scheduling (SPS) of a first set of downlink data transmissions, the downlink control signal indicating an applicable hybrid automatic repeat request (HARQ) feedback timing for the first set of downlink data transmissions;
• receive one or more of the first set of downlink data transmissions;
• determine that an applicable HARQ feedback timing for a second set of downlink data transmission received with an inapplicable HARQ feedback timing has not been provided, the second set of downlink data transmissions being received prior to the one or more of the first set of downlink data transmissions;
• and
• in response to the determination, determine a HARQ feedback timing for the one or more of the first set of downlink data transmissions based on a second downlink control signal indicating an applicable HARQ feedback timing received after reception of the one or more of the first set of downlink data transmissions.