Cell activation and deactivation in a wireless network
A wireless device may be instructed to activate a cell. The wireless device may activate a cell and start a timer. The wireless device may receive downlink control information (DCI). The DCI may indicate monitoring of a downlink control channel or may indicate a resource grant. The wireless device may monitor the downlink control channel and start another timer. The wireless device may receive the resource grant while one or more timers are running.
1. A method comprising:
receiving, by a wireless device, a medium access control (MAC) control element (CE) that indicates activation of a cell, and starting a first timer;
based on first downlink control information (DCI) that indicates monitoring of a downlink control channel, starting a second timer; and
receiving, while the first timer and the second timer are both running, second DCI comprising an indication of a resource grant.
2. The method of claim 1 , further comprising based on the second DCI, restarting the second timer.
3. The method of claim 1 , further comprising, based on at least one of the first timer expiring or receiving a second MAC CE that indicates deactivation of the cell, stopping the second timer.
4. The method of claim 1 , further comprising:
monitoring the downlink control channel; and
based on at least one of the first timer expiring or receiving a second MAC CE that indicates deactivation of the cell, stopping monitoring of the downlink control channel.
5. The method of claim 1 , further comprising:
monitoring the downlink control channel; and
based on the second timer expiring and while an activation status of the cell is maintained, stopping monitoring of the downlink control channel.
6. The method of claim 1 , further comprising:
based on the cell being active:
measuring one or more reference signals; or
monitoring a downlink control channel for receiving the first DCI.
7. The method of claim 6 , wherein at least one of the one or more reference signals is a channel state information reference signal.
8. The method of claim 1 , further comprising measuring one or more reference signals after activating the cell.
9. The method of claim 1 , wherein the first timer is associated with physical layer deactivation.
10. The method of claim 1 , wherein the second timer is associated with secondary cell deactivation.
11. The method of claim 1 , wherein the resource grant is at least one of:
a downlink assignment; or
an uplink grant.
12. The method of claim 1 , further comprising receiving configuration parameters comprising:
a first value for the first timer; and
a second value for the second timer.
13. The method of claim 1 , further comprising transmitting, based on the resource grant, at least one transmission.
14. The method of claim 1 , further comprising, based on the receiving the MAC CE that indicates activation of the cell, activating the cell.
15. The method of claim 1 , wherein the starting the first timer comprises starting the first timer based on the receiving the MAC CE that indicates activation of the cell.
16. The method of claim 1 , further comprising, based on the first DCI that indicates monitoring of the downlink control channel, monitoring the downlink control channel.
17. A method comprising:
transmitting, by a base station, a medium access control (MAC) control element (CE) that indicates activation of a cell, and starting a first timer;
based on first downlink control information (DCI) that indicates monitoring of a downlink control channel, starting a second timer; and
transmitting, while the first timer and the second timer are both running, second DCI comprising indication of a resource grant.
18. The method of claim 17 , further comprising, based on the second DCI, restarting the second timer.
19. The method of claim 17 , further comprising, based on at least one of the first timer expiring or transmitting a second MAC CE that indicates deactivation of the cell, stopping the second timer.
20. The method of claim 17 , wherein the first timer is associated with physical layer deactivation.
21. The method of claim 17 , wherein the second timer is associated with secondary cell deactivation.
22. The method of claim 17 , wherein the resource grant is at least one of:
a downlink assignment; or
an uplink grant.
23. The method of claim 17 , further comprising transmitting configuration parameters comprising:
a first value for the first timer; and
a second value for the second timer.
24. The method of claim 17 , further comprising receiving, based on the resource grant, at least one transmission.
25. The method of claim 17 , wherein the second timer is associated with monitoring of a downlink control channel.
26. The method of claim 17 , further comprising, based on the transmitting the MAC CE that indicates activation of the cell, activating the cell.
27. The method of claim 17 , wherein the starting the first timer comprises starting the first timer based on the transmitting the MAC CE that indicates activation of the cell.
28. A wireless device comprising:
one or more processors;
memory storing instructions that, when executed by the one or more processors, cause the wireless device to:
receive a medium access control (MAC) control element (CE) that indicates activation of a cell, and start a first timer;
based on first downlink control information (DCI) that indicates monitoring of a downlink control channel, start a second timer; and
receive, while the first timer and the second timer are both running, second DCI comprising an indication of a resource grant.
29. The wireless device of claim 28 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to, based on the second DCI, restart the second timer.
30. The wireless device of claim 28 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to, based on at least one of the first timer expiring or the wireless device receiving a second MAC CE that indicates deactivation of the cell, stop the second timer.
31. The wireless device of claim 28 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to:
monitor the downlink control channel; and
based on at least one of the first timer expiring or the wireless device receiving a second MAC CE that indicates deactivation of the cell, stop monitoring of the downlink control channel.
32. The wireless device of claim 28 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to:
monitor the downlink control channel; and
based on the second timer expiring and while an activation status of the cell is maintained, stop monitoring of the downlink control channel.
33. The wireless device of claim 28 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to:
based on the cell being active:
measure one or more reference signals; or
monitor a downlink control channel for receiving the first DCI.
34. The wireless device of claim 33 , wherein at least one of the one or more reference signals is a channel state information reference signal.
35. The wireless device of claim 28 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to measure one or more reference signals after activating the cell.
36. The wireless device of claim 28 , wherein the first timer is associated with physical layer deactivation.
37. The wireless device of claim 28 , wherein the second timer is associated with secondary cell deactivation.
38. The wireless device of claim 28 , wherein the resource grant is at least one of:
a downlink assignment; or
an uplink grant.
39. The wireless device of claim 28 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to receive configuration parameters comprising:
a first value for the first timer; and
a second value for the second timer.
40. The wireless device of claim 28 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to transmit, based on the resource grant, at least one transmission.
41. The wireless device of claim 28 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to, based on receiving the MAC CE that indicates activation of the cell, activate the cell.
42. The wireless device of claim 28 , wherein the instructions, when executed by the one or more processors, cause the wireless device to start the first timer at least by starting the first timer based on receiving the MAC CE that indicates activation of the cell.
43. The wireless device of claim 28 , wherein the instructions, when executed by the one or more processors, cause the wireless device to, based on the first DCI that indicates monitoring of the downlink control channel, monitor the downlink control channel.
44. A base station comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors:
transmit a medium access control (MAC) control element (CE) that indicates activation of a cell, and start a first timer;
based on first downlink control information (DCI) that indicates monitoring of a downlink control channel, start a second timer; and
transmit, while the first timer and the second timer are both running, second DCI comprising indication of a resource grant.
45. The base station of claim 44 , wherein the instructions, when executed by the one or more processors, further cause the base station to, based on the second DCI, restart the second timer.
46. The base station of claim 44 , wherein the instructions, when executed by the one or more processors, further cause the base station to, based on at least one of the first timer expiring or the base station transmitting a second MAC CE that indicates deactivation of the cell, stop the second timer.
47. The base station of claim 44 , wherein the first timer is associated with physical layer deactivation.
48. The base station of claim 44 , wherein the second timer is associated with secondary cell deactivation.
49. The base station of claim 44 , wherein the resource grant is at least one of:
a downlink assignment; or
an uplink grant.
50. The base station of claim 44 , wherein the instructions, when executed by the one or more processors, further cause the base station to transmit configuration parameters comprising:
a first value for the first timer; and
a second value for the second timer.
51. The base station of claim 44 , wherein the instructions, when executed by the one or more processors, further cause the base station to receive, based on the resource grant, at least one transmission.
52. The base station of claim 44 , wherein the second timer is associated with monitoring of a downlink control channel.
53. The base station of claim 44 , wherein the instructions, when executed by the one or more processors, further cause the base station to, based on transmitting the MAC CE that indicates activation of the cell, activating the cell.
54. The base station of claim 44 , wherein the instructions, when executed by the one or more processors, cause the base station to start the first timer at least by starting the first timer based on the transmitting the MAC CE that indicates activation of the cell.
55. A system comprising:
a base station; and
a wireless device;
wherein the base station is configured to transmit a medium access control (MAC) control element (CE) that indicates activation of a cell; and
wherein the wireless device is configured to:
based on the MAC CE, start a first timer;
based on first downlink control information (DCI) that indicates monitoring of a downlink control channel, start a second timer; and
receive, while the first timer and the second timer are both running, second DCI comprising an indication of a resource grant.
56. The system of claim 55 , wherein the wireless device is further configured to, based on the second DCI, restart the second timer.
57. The system of claim 55 , wherein the wireless device is further configured to, based on at least one of the first timer expiring or receiving a second MAC CE that indicates deactivation of the cell, stop the second timer.
58. The system of claim 55 , wherein the wireless device is further configured to:
monitor the downlink control channel; and
based on at least one of the first timer expiring or receiving a second MAC CE that indicates deactivation of the cell, stop monitoring of the downlink control channel.
59. The system of claim 55 , wherein the wireless device is further configured to:
monitor the downlink control channel; and
based on the second timer expiring and while an activation status of the cell is maintained, stop monitoring of the downlink control channel.
60. The system of claim 55 , wherein the wireless device is further configured to:
based on the cell being active:
measure one or more reference signals; or
monitor a downlink control channel for receiving the first DCI.
61. The system of claim 55 , wherein the wireless device is further configured to, based on the MAC CE that indicates activation of the cell, activating the cell.
62. The system of claim 55 , wherein the wireless device is configured to start the first timer at least by starting the first timer based on the receiving the MAC CE that indicates activation of the cell.
63. The system of claim 55 , wherein the wireless device is further configured to, based on the first DCI that indicates monitoring of the downlink control channel, monitor the downlink control channel.
64. A non-transitory computer-readable medium comprising instructions that, when executed, configure a wireless device to:
receive a medium access control (MAC) control element (CE) that indicates activation of a cell, and start a first timer;
based on first downlink control information (DCI) that indicates monitoring of a downlink control channel, start a second timer; and
receive, while the first timer and the second timer are both running, second DCI comprising an indication of a resource grant.
65. The non-transitory computer-readable medium of claim 64 , wherein the instructions, when executed, further configure the wireless device to, based on the second DCI, restart the second timer.
66. The non-transitory computer-readable medium of claim 64 , wherein the instructions, when executed, further configure the wireless device to, based on at least one of the first timer expiring or receiving a second MAC CE that indicates deactivation of the cell, stop the second timer.
67. The non-transitory computer-readable medium of claim 64 , wherein the instructions, when executed, further configure the wireless device to:
monitor the downlink control channel; and
based on at least one of the first timer expiring or receiving a second MAC CE that indicates deactivation of the cell, stop monitoring of the downlink control channel.
68. The non-transitory computer-readable medium of claim 64 , wherein the instructions, when executed, further configure the wireless device to:
monitor the downlink control channel; and
based on the second timer expiring and while an activation status of the cell is maintained, stop monitoring of the downlink control channel.
69. The non-transitory computer-readable medium of claim 64 , wherein the instructions, when executed, further configure the wireless device to:
based on the cell being active:
measure one or more reference signals; or
monitor a downlink control channel for receiving the first DCI.
70. The non-transitory computer-readable medium of claim 64 , wherein the instructions, when executed, further configure the wireless device to, based on the MAC CE that indicates activation of the cell, activate the cell.
71. The non-transitory computer-readable medium of claim 64 , wherein the instructions, when executed, further configure the wireless device to start the first timer at least by starting the first timer based on the MAC CE that indicates activation of the cell.
72. The non-transitory computer-readable medium of claim 64 , wherein the instructions, when executed, further configure the wireless device to, based on the first DCI that indicates monitoring of the downlink control channel, monitoring the downlink control channel.
73. A non-transitory computer-readable medium comprising instructions that, when executed, configure a base station to:
transmit a medium access control (MAC) control element (CE) that indicates activation of a cell, and start a first timer;
based on first downlink control information (DCI) that indicates monitoring of a downlink control channel, start a second timer; and
transmit, while the first timer and the second timer are both running, second DCI comprising indication of a resource grant.
74. The non-transitory computer-readable medium of claim 73 , wherein the instructions, when executed, further configure the base station to, based on the second DCI, restart the second timer.
75. The non-transitory computer-readable medium of claim 73 , wherein the instructions, when executed, further configure the base station to, based on the MAC CE that indicates activation of the cell, activate the cell.
76. The non-transitory computer-readable medium of claim 73 , wherein the instructions, when executed, further configure the base station to start the first timer at least by starting the first timer based on the MAC CE that indicates activation of the cell.