Techniques are described for hybrid automatic repeat request acknowledgement (HARQ-ACK) information generation techniques for group common shared channels, such as one or more physical downlink shared channels (PDSCHs). A wireless communication method includes receiving, by a communication device, a control information that indicates that a set of information is to be received by the communication device using a multicast service; and transmitting, by the communication device, HARQ ACK information in a shared channel, where the HARQ-ACK information indicates whether the set of information is received or correctly decoded by the communication device, where the HARQ-ACK information is generated using assignment indexes included in the control information received by the communication device, where each of the assignment indexes indicates a size of the HARQ-ACK information to be transmitted by the communication device, and where the assignment indexes are associated with the multicast service and a unicast service.