US Patent No. 10,342,005

METHODS FOR DETERMINING A HARQ-ACK CODEBOOK SIZE FOR A USER EQUIPMENT AND BASE STATION


Patent No. 10,342,005
Issue Date July 02, 2019
Title Methods For Determining A Harq-ack Codebook Size For A User Equipment And Base Station
Inventorship Xinghua Song, Beijing (CN)
Mattias Andersson, Sundbyberg (SE)
Daniel Larsson, Lund (SE)
Shaohua Li, Beijing (CN)
Yu Yang, Solna (SE)
Assignee Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)

Claim of US Patent No. 10,342,005

1. A method performed by a Base Station, BS, the method comprising:determining a Hybrid Automatic Repeat Request-Acknowledgement, HARQ-ACK, codebook size for a User Equipment, UE, based on data to be transmitted in a data transmission to the UE, the HARQ-ACK codebook size indicating a number of HARQ-ACK bits for the UE to encode for transmitting Hybrid Automatic Repeat Request, HARQ, feedback for the data transmission to the BS; wherein the data transmission to the UE is scheduled on a set of carriers comprised in a group of carriers;
transmitting an indication of the HARQ-ACK codebook size in a Downlink Assignment Index, DAI, field of a Downlink, DL, assignment to the UE comprises, transmitting, for the set of carriers, respective Downlink Control Information, DCI, messages, wherein each DCI message comprises the DAI field, wherein the indication of the HARQ-ACK codebook size transmitted in the DAI field of each DCI message indicates the same first value for the set of carriers; and
wherein the first value indicates an order by which the set of carriers comprised in the group is scheduled relative to a further group of carriers comprising a further set of carriers also scheduled for the data transmission.