Embodiments herein relate to a wireless device and an Access and Mobility Management Function, AMF, and methods performed by a wireless device and an AMF, respectively.

Aspects of the present disclosure provide various hybrid automatic repeat request (HARQ) retransmission indication schemes used in a HARQ retransmission process. The HARQ retransmission indication can implicitly or explicitly indicate which part of a transport block (TB), code block group(s), or code block(s) is/are being retransmitted so that the receiver can associate the retransmitted TB, code block group(s), code block(s) with the correct prior reception, for example, for HARQ combining purposes.

Aspects of the present disclosure provide various hybrid automatic repeat request (HARQ) retransmission indication schemes used in a HARQ retransmission process. The HARQ retransmission indication can implicitly or explicitly indicate which part of a transport block (TB), code block group(s), or code block(s) is/are being retransmitted so that the receiver can associate the retransmitted TB, code block group(s), code block(s) with the correct prior reception, for example, for HARQ combining purposes.

UEs are configured to transmit feedback related to data received on a multicast traffic channel on dedicated resources. Network nodes are configured to retransmit the data based on the received feedback.

A wireless device and an Access and Mobility Management Function (AMF) and methods performed by a wireless device and an AMF, respectively.

A method is provided in a receiving node for handling status information of data units transmitted from a sending node to the receiving node over a radio link. The receiving node establishes that a number of data units that has been transmitted by the sending node are missing. The receiving node sends a reduced status message to the sending node over the radio link, which message is reduced such that it comprises the negative acknowledgement for a first part of missing data units and omits negative acknowledgements for the rest of the missing data units. The omitted negative acknowledgement for the rest of the missing data units will not erroneously be interpreted as correctly received data units by the sending node.

A method is provided in a receiving node for handling status information of data units transmitted from a sending node to the receiving node over a radio link. The receiving node establishes that a number of data units that has been transmitted by the sending node are missing. The receiving node sends a reduced status message to the sending node over the radio link, which message is reduced such that it comprises the negative acknowledgement for a first part of missing data units and omits negative acknowledgements for the rest of the missing data units. The omitted negative acknowledgement for the rest of the missing data units will not erroneously be interpreted as correctly received data units by the sending node.

A method for billing in a wireless communication system, according to an embodiment, includes: transmitting billing data to an upper entity; determining whether the billing data has been normally transmitted; and executing a supplementary operation based on a result of the determining.

A method for billing in a wireless communication system, according to an embodiment, includes: transmitting billing data to an upper entity; determining whether the billing data has been normally transmitted; and executing a supplementary operation based on a result of the determining.

This application provides a channel state information transmission method, an access network device, and a terminal device. The method includes: receiving, by an access network device, CSI reported by a terminal device, where the CSI includes a first PMI and a second PMI; and determining, by the access network device based on the first PMI and the second PMI, a precoding matrix W whose rank is greater than or equal to 2, where W meets W=W.sub.1×W.sub.2, and the second PMI is used to indicate some column vectors in W.sub.2. According to the method in the embodiment, overheads of feeding back the CSI by the terminal device are effectively reduced.