Transmission and Reception of Power Saving Command

A wireless device comprising:

• one or more processors;
• and
• memory storing instructions that, when executed by the one or more processors, cause the wireless device to:
• receive a downlink control information (DCI) comprising:
• a first field indicating a transition of a cell to a dormant state;
• and
• a second field indicating a hybrid automatic repeat request (HARQ) feedback timing;
• and
• transmit, in response to the DCI indicating the transition and via a physical uplink control channel resource, a positive acknowledgement of a reception of the DCI at a time interval based on the HARQ feedback timing.

A system comprising:

• a wireless device comprising one or more first processors and first memory storing instructions that, when executed by the one or more first processors, cause the wireless device to:
• receive a downlink control information (DCI) comprising:
• a first field indicating a transition of a cell to a dormant state;
• and
• a second field indicating a hybrid automatic repeat request (HARQ) feedback timing;
• and
• transmit, in response to the DCI indicating the transition and via a physical uplink control channel resource, a positive acknowledgement of a reception of the DCI at a time interval based on the HARQ feedback timing.
• a base station comprising one or more second processors and second memory storing instructions that, when executed by the one or more second processors, cause the base station to:
• transmit the DCI;
• and
• receive the positive acknowledgement.