Deactivation timer management in a wireless device and wireless network

Abstract

A wireless device receives cross carrier scheduling parameter(s). A first control channel of a first cell carries downlink scheduling information for packets received via a downlink data channel of the first cell. A second control channel of a second cell carries uplink scheduling information for second packets transmitted via an uplink data channel of the first cell. A first DCI for uplink transmission is received via the first cell. A first deactivation timer of the first cell and a second deactivation timer of the second cell are started in response to the first DCI. A second DCI for downlink transmission is received via the first cell. The first deactivation timer and not the second deactivation timer is restarted in response to the second DCI. The first cell is deactivated in response to the first deactivation timer expiring. The second cell is deactivated in response to the second deactivation timer expiring.

The invention claimed is: 
     
       1. A method comprising:
 receiving, by a wireless device, configuration parameters of a first cell and a second cell, the configuration parameters comprising at least one cross carrier scheduling parameter indicating a configuration of cross carrier scheduling, wherein:
 a first control channel of the first cell carries downlink scheduling information for packets received by the wireless device via a downlink data channel of the first cell; and 
 a second control channel of the second cell carries uplink scheduling information for second packets transmitted by the wireless device via an uplink data channel of the first cell; 
 
 receiving a first downlink control information (DCI) 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 first DCI; 
 receiving a second DCI for downlink transmission via the first cell; 
 restarting the first deactivation timer and not the second deactivation timer in response to the second DCI; 
 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 control element (MAC CE) indicating activation of the first cell; and 
 starting the first deactivation timer in response to receiving the MAC CE. 
 
     
     
       9. 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 configuration parameters of a first cell and a second cell, the configuration parameters comprising
 at least one cross carrier scheduling parameter indicating a configuration of cross carrier scheduling, wherein:
 a first control channel of the first cell carries downlink scheduling information for packets received by the wireless device via a downlink data channel of the first cell; and 
 a second control channel of the second cell carries uplink scheduling information for second packets transmitted by the wireless device via an uplink data channel of the first cell; 
 
 
 receive a first downlink control information (DCI) for uplink transmission on the first cell; 
 restart a first deactivation timer of the first cell and a second deactivation timer of the second cell in response to the first DCI; 
 receive a second DCI for downlink transmission via the first cell; 
 restart the first deactivation timer and not the second deactivation timer in response to the second DCI; 
 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. 
 
 
     
     
       10. The wireless device 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. The wireless device of  claim 9 , wherein the first cell is a licensed assisted access (LAA) cell. 
     
     
       12. The wireless device of  claim 9 , wherein the second cell is a licensed cell. 
     
     
       13. The wireless device of  claim 9 , wherein the first DCI indicates a modulation and coding scheme for transmission of one or more transport blocks. 
     
     
       14. The wireless device of  claim 9 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to receive, 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. 
     
     
       15. The wireless device of  claim 9 , wherein the first DCI comprises a field indicating a time interval during which a trigger is received. 
     
     
       16. The wireless device of  claim 9 , further comprising:
 receiving a media access control control element (MAC CE) indicating activation of the first cell; and 
 starting the first deactivation timer in response to receiving the MAC CE. 
 
     
     
       17. A method comprising:
 transmitting, by a base station to a wireless device, configuration parameters of a first cell and a second cell, the configuration parameters comprising:
 at least one deactivation timer value for a first deactivation timer of the first cell and a second deactivation timer of the second cell; and 
 at least one cross carrier scheduling parameter indicating a configuration of cross carrier scheduling, wherein:
 a first control channel of the first cell carries downlink scheduling information for packets received by the wireless device via a downlink data channel of the first cell; and 
 a second control channel of the second cell carries uplink scheduling information for second packets transmitted by the wireless device via an uplink data channel of the first cell; 
 
 
 transmitting a first downlink control information (DCI) for uplink transmission on the first cell; 
 restarting the first deactivation timer of the first cell and the second deactivation timer of the second cell in response to the first DCI; 
 transmitting a second DCI for downlink transmission via the first cell; 
 restarting the first deactivation timer and not the second deactivation timer in response to the second DCI; 
 deactivating a status of the first cell in response to the first deactivation timer expiring; and 
 deactivating a status of the second cell in response to the second deactivation timer expiring. 
 
     
     
       18. The method of  claim 17 , 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. 
 
     
     
       19. The method of  claim 17 , wherein the first cell is a licensed assisted access (LAA) cell. 
     
     
       20. The method of  claim 17 , wherein the second cell is a licensed cell.