Semistatic codebook for simultaneous reception

A first network node for wireless communication, comprising:

• a processing system configured to:
• determine a number (M) of candidate downlink transmission occasions for a time period;
• determine a maximum number (k) of simultaneous downlink transmissions the first network node can receive during the time period;
• receive one or more downlink transmissions during the time period from a second network node;
• encode hybrid automatic repeat request (HARQ) feedback based at least on the number M and the maximum number k;
• and
• transmit the encoded HARQ feedback to the second network node, wherein the one or more downlink transmissions are a plurality of simultaneous downlink transmissions and total less than k downlink transmissions, wherein each downlink transmission of the one or more downlink transmissions is characterized by at least one binary vector of a plurality of binary vectors indicating a corresponding downlink transmission occasion, and wherein, to encode the HARQ feedback, the processing system is configured to:
• select a HARQ codeword index from a plurality of HARQ codeword indices, wherein each HARQ codeword index in the plurality of HARQ codeword indices corresponds to a respective binary vector of the plurality of binary vectors, and wherein each binary vector of the plurality of binary vectors comprises M elements and a respective weight less than or equal to k, and
• calculate a parity value of a first downlink transmission of the one or more downlink transmissions based at least on the binary vector corresponding to the first downlink transmission, wherein the encoded HARQ feedback comprises the selected HARQ codeword index and the parity value.

A first network node for wireless communication, comprising:

• a processing system configured to:
• determine a number (M) of candidate downlink transmission occasions for a time period;
• determine a maximum number (k) of simultaneous downlink transmissions the first network node can receive during the time period;
• receive one or more downlink transmissions during the time period from a second network node;
• encode hybrid automatic repeat request (HARQ) feedback based at least on the number M and the maximum number k;
• and
• transmit the encoded HARQ feedback to the second network node, wherein the one or more downlink transmissions are a plurality of simultaneous downlink transmissions and total (k−1) downlink transmissions, wherein each downlink transmission of the one or more downlink transmissions is characterized by at least one binary vector of a plurality of binary vectors indicating a corresponding downlink transmission occasion, and wherein, to encode the HARQ feedback, the processing system is configured to:
• associate the corresponding downlink transmission occasion of each downlink transmission of the one or more downlink transmissions with a respective index value;
• and
• calculate a respective summing value comprising a summation of index values associated with each of the one or more downlink transmissions, and wherein the encoded HARQ feedback comprises the summing value.