Power saving

1. A method comprising:

receiving, by a wireless device, one or more radio resource control messages comprising a power saving radio network temporary identifier (PS-RNTI) for a power saving (PS) mode and a downlink control information (DCI), wherein the DCI comprises a plurality of blocks and notifies power saving information;

receiving, by the wireless device, a message indicating that each bit of a dormancy indication bitmap corresponds to at least one cell of one or more secondary cells;

receiving, based on the PS-RNTI, a first DCI comprising a first dormancy indication bitmap, wherein the message indicates a correspondence between a first bit of the first dormancy indication bitmap and at least one first cell of the one or more secondary cells;

determining the first DCI for indicating the PS mode based on a HARQ process number of the first DCI being set to a predefined value;

in response to determining the first DCI for indicating the PS mode, enabling the PS mode;

transitioning the at least one first cell from a dormancy to a non-dormancy, based on the first bit having a first value;

transitioning at least one second cell, of the one or more secondary cells, from a non-dormancy to a dormancy, in response to:

the first dormancy indication bitmap comprising a second bit corresponding to the at least one second cell; and

the second bit having a second value different from the first value;

reporting channel quality indicator (CQI)/precoding matrix indicator (PMI)/rank indicator (RI)/precoding type indicator (PTI)/channel state information-reference signal resource indicator (CRI) for the at least one second cell according to a periodicity configured for the at least one second cell, in response to the at least one second cell being transitioned to the dormancy;

receiving a second DCI indicating disabling the PS mode; and

in response to one or more fields of the second DCI being set to a predetermined value, switching, by the wireless device, from the PS mode to a normal access mode.

2. The method of claim 1 , wherein:

the dormancy of the at least one first cell is a power saving state of the at least one first cell; and

the non-dormancy of the at least one first cell is a non-power saving state of the at least one first cell.

3. The method of claim 1 , further comprising monitoring, by the wireless device, a control channel of the at least one first cell after the transitioning to the non-dormancy.

4. The method of claim 3 , wherein the monitoring is in response to the transitioning.

5. The method of claim 3 , wherein the wireless device does not monitor the control channel of the at least one first cell before the transitioning to the non-dormancy.

6. The method of claim 1 , wherein the message is a radio resource control message.

7. The method of claim 1 , wherein the message comprises a primary cell configuration of a primary cell and one or more secondary cells configurations of the one or more secondary cells.

8. The method of claim 1 , further comprising:

receiving a third DCI comprising a second dormancy indication bitmap comprising the first bit; and

transitioning the at least one first cell from the non-dormancy to the dormancy based on the first bit having a second value different from the first value.

9. The method of claim 1 , further comprising:

skipping monitoring one or more PS signal according to one or more PS signal parameters, in response to disabling the PS mode.

10. The method of claim 1 , wherein the wireless device skips monitoring physical downlink control channel (PDCCH) in a discontinuous reception (DRX) active time of a DRX cycle in the PS mode.

11. 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 one or more radio resource control messages comprising a power saving radio network temporary identifier (PS-RNTI) for a power saving (PS) mode, and a downlink control information (DCI), wherein the DCI comprises a plurality of blocks and notifies power saving information;

receive a message indicating that each bit of a dormancy indication bitmap corresponds to at least one cell of one or more secondary cells;

receive, based on the PS-RNTI, a first DCI comprising a first dormancy indication bitmap, wherein the message indicates a correspondence between a first bit of the first dormancy indication bitmap and at least one first cell of the one or more secondary cells;

determine the first DCI for indicating the PS mode based on a HARQ process number of the first DCI being set to a predefined value;

in response to determining the first DCI for indicating the PS mode, enable the PS mode;

transition the at least one first cell from a dormancy to a non-dormancy, based on the first bit having a first value;

transition at least one second cell, of the one or more secondary cells, from a non-dormancy to a dormancy, in response to:

the first dormancy indication bitmap comprising a second bit corresponding to the at least one second cell; and

the second bit having a second value different from the first value;

report channel quality indicator (CQI)/precoding matrix indicator (PMI)/rank indicator (RI)/precoding type indicator (PTI)/channel state information-reference signal resource indicator (CRI) for the at least one second cell according to a periodicity configured for the at least one second cell, in response to the at least one second cell being transitioned to the dormancy;

receive a second DCI indicating disabling the PS mode; and

in response to one or more fields of the second DCI being set to a predetermined value, switch, by the wireless device, from the PS mode to a normal access mode.

12. The wireless device of claim 11 , wherein:

the dormancy of the at least one first cell is a power saving state of the at least one first cell; and

the non-dormancy of the at least one first cell is a non-power saving state of the at least one first cell.

13. The wireless device of claim 11 , wherein the instructions further cause the wireless device to monitor a control channel of the at least one first cell after the transitioning to the non-dormancy.

14. The wireless device of claim 13 , wherein the monitoring is in response to the transitioning.

15. The wireless device of claim 13 , wherein the instructions further cause the wireless device to not monitor the control channel of the at least one first cell before the transitioning to the non-dormancy.

16. The wireless device of claim 11 , wherein the message is a radio resource control message.

17. The wireless device of claim 11 , wherein the message comprises a primary cell configuration of a primary cell and one or more secondary cells configurations of the one or more secondary cells.

18. The wireless device of claim 11 , wherein the instructions further cause the wireless device to:

receive a third DCI comprising a second dormancy indication bitmap comprising the first bit; and

transition the at least one first cell from the non-dormancy to the dormancy based on the first bit having a second value different from the first value.

19. A system comprising:

a base station comprising: one or more processors and memory storing instructions that, when executed by the one or more processors, cause the base station to:

transmit, to a wireless device, one or more radio resource control messages comprising a power saving radio network temporary identifier (PS-RNTI) for a power saving (PS) mode, and a downlink control information (DCI), wherein the DCI comprises a plurality of blocks and notifies power saving information;

transmit, to the wireless device, a message indicating that each bit of a dormancy indication bitmap corresponds to at least one cell of one or more secondary cells;

transmit a first DCI comprising a first dormancy indication bitmap, wherein the message indicates a correspondence between a first bit of the first dormancy indication bitmap and at least one first cell of the one or more secondary cells;

transition the at least one first cell from a dormancy to a non-dormancy, based on the first bit having a first value;

transmit a second DCI indicating disabling the PS mode; and

the wireless device, wherein the wireless device comprises: one or more processors and memory storing instructions that, when executed by the one or more processors, cause the wireless device to:

receive one or more radio resource control messages comprising the PS-RNTI;

receive the message;

receive, based on the PS-RNTI, the first DCI;

determine the first DCI for indicating the PS mode based on a HARQ process number of the first DCI being set to a predefined value;

in response to determining the first DCI for indicating the PS mode, enable the PS mode;

transition the at least one first cell from a dormancy to a non-dormancy, based on the first bit having a first value;

transitioning at least one second cell, of the one or more secondary cells, from a non-dormancy to a dormancy, in response to:

the first dormancy indication bitmap comprising a second bit corresponding to the at least one second cell; and

the second bit having a second value different from the first value;

reporting channel quality indicator (CQI)/precoding matrix indicator (PMI)/rank indicator (RI)/precoding type indicator (PTI)/channel state information-reference signal resource indicator (CRI) for the at least one second cell according to a periodicity configured for the at least one second cell, in response to the at least one second cell being transitioned to the dormancy;

receive the second DCI indicating disabling the PS mode; and

in response to one or more fields of the second DCI being set to a predetermined value, switching, by the wireless device, from the PS mode to a normal access mode.