Urllc dai and lti

A base station for a wireless communication system, the wireless communication system comprising one or more base stations and one or more user devices, UEs, wherein the base station is configured to

• transmit data to a UE being served by the base station, the data comprising control data and user data, the user data comprising at least first user data and second user data, the first user data associated with a first service and second data associated with second service, the first and second services comprising one or more different transmission requirements, and
• receive from the UE a feedback, the feedback indicating for one or more data blocks of the data a successful or non-successful reception at the UE,
• wherein the control data comprises a first downlink assignment index, DAI, associated with the first data, and a second DAI associated with the second data.

A user device for a wireless communication system, the wireless communication system comprising one or more base stations and one or more user devices, UEs, wherein the UE is configured to

• receive data from one or more base stations serving the UE, the data comprising control data and user data, the user data comprising at least first user data and second user data, the first user data associated with a first service and second data associated with second service, the first and second services comprising one or more different transmission requirements, and
• responsive to receiving in the control data a grant for a feedback transmission, send a feedback to the one or more base stations, the feedback indicating for one or more data blocks of the data a successful or non-successful reception at the UE,
• wherein the control data comprises a first downlink assignment index, DAI, associated with the first data, and a second DAI associated with the second data.

A base station for a wireless communication system, the wireless communication system comprising one or more base stations and one or more user devices, UEs, wherein the base station is configured to

• transmit data to a UE being served by the base station, the data comprising control data and user data, and
• receive from the UE a feedback, the feedback indicating for one or more data blocks of the data a successful or non-successful reception at the UE,
• wherein the control data comprises a last transmission indicator, LTI, the LTI indicating a time since the last transmission of the first and/or second data by the base station.

A user device for a wireless communication system, the wireless communication system comprising one or more base stations and one or more user devices, UEs, wherein the UE is configured to

• receive data from a base station serving the UE, the data comprising control data and user data, and
• responsive to receiving a grant for a feedback transmission in the control data, send a feedback to the base station, the feedback indicating for one or more data blocks of the data a successful or non-successful reception at the UE,
• wherein the control data comprises a last transmission indicator, LTI, the LTI indicating a time since the last transmission of the first and/or second data by the base station.

A method, comprising

• transmitting, by one or more base stations of a wireless communication system comprising one or more base stations and one or more user devices, UEs, data to a UE being served by the one or more base stations, the data comprising control data and user data, the user data comprising at least first user data and second user data, the first user data associated with a first service and second data associated with second service, the first and second services comprising one or more different transmission requirements, and
• responsive to receiving in the control data a grant for a feedback transmission, sending, by the UE, a feedback to the one or more base stations, the feedback indicating for one or more data blocks of the data a successful or non-successful reception at the UE, a wireless communication system comprising one or more base stations and one or more user devices, UEs,
• wherein the control data comprises a first downlink assignment index, DAI, associated with the first data, and a second DAI associated with the second data.

A method, comprising

• transmitting, by a base station of a wireless communication system comprising one or more base stations and one or more user devices, UEs, data to a UE being served by the base station, the data comprising control data and user data,
• responsive to receiving a grant for a feedback transmission in the control data, sending, by the UE, a feedback to the base station, the feedback indicating for one or more data blocks of the data a successful or non-successful reception at the UE, and
• wherein the control data comprises a last transmission indicator, LTI, the LTI indicating a time since the last transmission of the first and/or second data by the base station.