HARQ codebook for radio access networks

A user equipment (UE) configured to operate in a radio access network (RAN), the user equipment comprising:

• radio circuitry configured to communicate with the radio access network;
• and
• processing circuitry operably coupled to the radio circuitry, whereby the processing circuitry and the radio circuitry are configured to:
• receive, from a radio node in the RAN, a hybrid ARQ (HARQ) rescheduling indication that indicates rescheduling by the radio node of acknowledgement signaling previously scheduled for transmission by the UE, wherein the acknowledgement signaling is associated with one or more first downlink (DL) HARQ processes;
• based on the HARQ rescheduling indication, determine a HARQ codebook to be used for encoding the rescheduled acknowledgement signaling together with further acknowledgement signaling associated with one or more second DL HARQ processes;
• encode the rescheduled acknowledgement signaling and the further acknowledgement signaling based on the determined HARQ codebook;
• and
• transmit the encoded rescheduled acknowledgement signaling and further acknowledgement signaling to the radio node according to the rescheduling indication.

A method of operating a radio node in a radio access network (RAN), the method comprising:

• upon failing to receive acknowledge signaling that was scheduled by the radio node for transmission by a user equipment (UE), transmitting to the UE a hybrid ARQ (HARQ) rescheduling indication that indicates rescheduling by the radio node of the acknowledgement signaling;
• receiving, from the UE, the rescheduled acknowledgement signaling together with further acknowledgement signaling, wherein:
• the rescheduled acknowledgement signaling includes HARQ feedback for one or more transmissions by the radio node associated with one or more first downlink (DL) HARQ processes, and
• the further acknowledgement signaling includes HARQ feedback for one or more transmission by the radio node associated with one or more second DL HARQ processes;
• based on the HARQ rescheduling indication, determining a HARQ codebook to be used for decoding the rescheduled acknowledgement signaling and the further acknowledgement signaling;
• and
• based on the determined HARQ codebook, decoding the rescheduled acknowledgement signaling and the further acknowledgement signaling to obtain the HARQ feedback included therein.

A radio node configured to operate in a radio access network (RAN), the radio node comprising:

• radio circuitry configured to communicate with a user equipment (UE);
• and
• processing circuitry operably coupled to the radio circuitry, whereby the processing circuitry and the radio circuitry are configured to:
• upon failing to receive acknowledge signaling that was scheduled by the radio node for transmission by the UE, transmit to the UE a hybrid ARQ (HARQ) rescheduling indication that indicates rescheduling by the radio node of the acknowledgement signaling;
• and
• receive, from the UE, the rescheduled acknowledgement signaling together with further acknowledgement signaling, wherein:
• the rescheduled acknowledgement signaling includes HARQ feedback for one or more transmissions by the radio node associated with one or more first downlink (DL) HARQ processes, and
• the further acknowledgement signaling includes HARQ feedback for one or more transmission by the radio node associated with one or more second DL HARQ processes;
• based on the HARQ rescheduling indication, determine a HARQ codebook to be used for decoding the rescheduled acknowledgement signaling and the further acknowledgement signaling;
• and
• based on the determined HARQ codebook, decode the rescheduled acknowledgement signaling and the further acknowledgement signaling to obtain the HARQ feedback included therein.