Deactivation timer management in a wireless device and wireless network

1. A method comprising:

receiving, by a wireless device, configuration parameters indicating:

a first cell carries self-carrier scheduling information for downlink packets received via the first cell; and

a second cell carries cross-carrier scheduling information for uplink packets transmitted via the first cell;

receiving a first downlink control information (DCI) comprising an uplink grant for uplink transmission via the first cell;

restarting a first deactivation timer of the first cell and a second deactivation timer of the second cell in response to the uplink grant;

receiving a second DCI comprising a downlink assignment for downlink transmission via the first cell;

restarting the first deactivation timer and not the second deactivation timer in response to the downlink assignment;

deactivating the first cell in response to the first deactivation timer expiring; and

deactivating the second cell in response to the second deactivation timer expiring.

2. The method of claim 1 , wherein the first DCI comprises:

a first field indicating an uplink resource block assignment; and

a first trigger field indicating that the first DCI is triggered in response to a trigger.

3. The method of claim 1 , wherein the first cell is a licensed assisted access (LAA) cell.

4. The method of claim 1 , wherein the second cell is a licensed cell.

5. The method of claim 1 , wherein the first DCI indicates a modulation and coding scheme for transmission of one or more transport blocks.

6. The method of claim 1 , further comprising receiving, via a common search space of a control channel of the first cell, a third DCI comprising a second trigger field indicating a second trigger, when the first DCI indicates that the first DCI is a triggered DCI.

7. The method of claim 1 , wherein the first DCI comprises a field indicating a time interval during which a trigger is received.

8. The method of claim 1 , further comprising:

receiving a media access control element (MAC CE) indicating activation of the first cell; and

starting the first deactivation timer in response to receiving the MAC CE.

9. The method of claim 1 , wherein:

the first cell carries scheduling information for the downlink packets via a first control channel; and

the second cell carries scheduling information for the uplink packets via a second control channel.

10. The method of claim 9 , wherein the first DCI comprises:

a first field indicating an uplink resource block assignment; and

a first trigger field indicating that the first DCI is triggered in response to a trigger.

11. A method comprising:

receiving, by a wireless device, configuration parameters indicating:

a first cell carries self-carrier scheduling information for downlink packets received via the first cell; and

a second cell carries cross-carrier scheduling information for uplink packets transmitted via the first cell;

receiving a downlink control information (DCI) for transmission via the first cell;

determining whether the DCI comprises an uplink grant for uplink transmission or a downlink assignment for downlink transmission;

based on determining that the DCI comprises the uplink grant, restarting a deactivation timer of the second cell;

based on determining that the DCI comprises a downlink assignment, not restarting the deactivation timer of the second cell; and

deactivating the second cell in response to the deactivation timer of the second cell expiring.

12. The method of claim 11 , wherein the DCI comprises:

a first field indicating an uplink resource block assignment; and

a first trigger field indicating that the DCI is triggered in response to a trigger.

13. The method of claim 11 , wherein the first cell is a licensed assisted access (LAA) cell.

14. The method of claim 11 , wherein the second cell is a licensed cell.

15. The method of claim 11 , wherein the DCI indicates a modulation and coding scheme for transmission of one or more transport blocks.

16. The method of claim 11 , further comprising receiving, via a common search space of a control channel of the first cell, a second DCI comprising a second trigger field indicating a second trigger, when the DCI indicates that the DCI is a triggered DCI.

17. The method of claim 11 , wherein the DCI comprises a field indicating a time interval during which a trigger is received.

18. The method of claim 11 , further comprising:

receiving a media access control element (MAC CE) indicating activation of the first cell; and

starting the deactivation timer of the first cell in response to receiving the MAC CE.

19. The method of claim 11 , wherein:

the first cell carries scheduling information for the downlink packets via a first control channel; and

the second cell carries scheduling information for the uplink packets via a second control channel.

20. A system comprising:

a base station comprising:

one or more first processors; and

first memory storing first instructions that, when executed by the one or more first processors of the base station, cause the base station to:

transmit configuration parameters indicating:

a first cell carries self-carrier scheduling information for downlink packets received via the first cell; and

a second cell carries cross-carrier scheduling information for uplink packets transmitted via the first cell;

transmit a first downlink control information (DCI) comprising an uplink grant for uplink transmission via the first cell; and

transmit a second DCI comprising a downlink assignment for downlink transmission via the first cell;

a wireless device comprising:

one or more processors; and

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

receive the configuration parameters; and

receive the first DCI;

restart a first deactivation timer of the first cell and a second deactivation timer of the second cell in response to the uplink grant;

receive the second DCI;

restart the first deactivation timer and not the second deactivation timer in response to the downlink assignment;

deactivate the first cell in response to the first deactivation timer expiring; and

deactivate the second cell in response to the second deactivation timer expiring.