Activation of uplink radio resources
Systems, apparatuses, and methods are described for wireless communications. A base station may send a message to a wireless device to activate uplink transmissions for a non-activated cell. The wireless device may receive the message and activate a previously non-activated cell.
1. A method comprising:
receiving, by a wireless device, a first message indicating uplink radio resources for a cell;
receiving a second message indicating an activation of the cell;
in response to the receiving the second message:
activating the cell; and
activating the uplink radio resources; and
sending, via the uplink radio resources, one or more data packets.
2. The method of claim 1 , wherein the cell comprises a secondary cell.
3. The method of claim 1 , wherein the sending the one or more data packets comprises:
sending the one or more data packets using a modulation and coding scheme, wherein the first message further indicates the modulation and coding scheme.
4. The method of claim 1 , wherein the sending the one or more data packets is based on a quantity of permitted repeat transmissions.
5. The method of claim 1 , further comprising:
receiving, via a downlink control channel, a control signal; and
based on the receiving the control signal, activating the uplink radio resources.
6. The method of claim 1 , further comprising receiving a response message associated with the one or more data packets, wherein the response message comprises downlink control information.
7. The method of claim 1 , wherein the activating the cell comprises re-activating a deactivated cell.
8. The method of claim 1 , wherein the first message comprises at least one radio resource control message.
9. The method of claim 1 , wherein the second message comprises at least one medium access control (MAC) control element (CE).
10. The method of claim 1 , further comprising:
based on expiration of a time alignment timer, stopping uplink transmissions via the uplink radio resources; and
based on receiving a timing advance command:
re-activating the uplink radio resources; and
sending, via the re-activated uplink radio resources, one or more second data packets.
11. A method comprising:
receiving, by a wireless device, a first message indicating uplink radio resources for a cell;
sending, via the uplink radio resources and based on the receiving the first message, one or more first data packets;
based on expiration of a time alignment timer, stopping uplink transmissions via the uplink radio resources; and
based on receiving a timing advance command:
activating the uplink radio resources; and
sending, via the activated uplink radio resources, one or more second data packets.
12. The method of claim 11 , wherein the uplink radio resources are associated with a secondary cell.
13. The method of claim 11 , further comprising:
sending the one or more first data packets by sending the one or more first data packets using a modulation and coding scheme indicated by the first message.
14. The method of claim 11 , wherein the sending the one or more first data packets comprises sending the one or more first data packets based on a quantity of permitted repeat transmissions.
15. The method of claim 11 , wherein the first message indicates that:
the uplink radio resources are activated based on receiving at least one radio resource control message; or
the uplink radio resources are activated based on receiving a control signal from a base station.
16. The method of claim 11 , further comprising:
receiving a response message associated with the one or more second data packets, wherein the response message comprises downlink control information.
17. The method of claim 11 , wherein the first message comprises at least one of:
a radio resource control (RRC) message; or
a medium access control (MAC) control element (CE).
18. The method of claim 11 , further comprising:
activating the uplink radio resources by re-activating a deactivated cell.
19. 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 first message indicating uplink radio resources for a cell;
receive a second message indicating an activation of the cell;
in response to receiving the second message:
activate the cell; and
activate the uplink radio resources; and
send, via the uplink radio resources, one or more data packets.
20. The wireless device of claim 19 , wherein the cell comprises a secondary cell.
21. The wireless device of claim 19 , wherein the instructions, when executed by the one or more processors, cause the wireless device to send the one or more data packets by sending the one or more data packets using a modulation and coding scheme, wherein the first message further indicates the modulation and coding scheme.
22. The wireless device of claim 19 , wherein the instructions, when executed by the one or more processors, cause the wireless device to send the one or more data packets based on a quantity of permitted repeat transmissions.
23. The wireless device of claim 19 , wherein the instructions, when executed by the one or more processors, cause the wireless device to:
receive, via a downlink control channel, a control signal; and
based on receiving the control signal, activate the uplink radio resources.
24. The wireless device of claim 19 , wherein the instructions, when executed by the one or more processors, cause the wireless device to receive a response message associated with the one or more data packets, wherein the response message comprises downlink control information.
25. The wireless device of claim 19 , wherein the instructions, when executed by the one or more processors, cause the wireless device to activate the cell by re- activating a deactivated cell.
26. The wireless device of claim 19 , wherein the first message comprises at least one radio resource control message.
27. The wireless device of claim 19 , wherein the second message comprises at least one medium access control (MAC) control element (CE).
28. The wireless device of claim 19 , wherein the instructions, when executed by the one or more processors, cause the wireless device to
based on expiration of a time alignment timer, stop uplink transmissions via the uplink radio resources; and
based on receiving a timing advance command:
re-activate the uplink radio resources; and
send, via the re-activated uplink radio resources, one or more second data packets.
29. 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 first message indicating uplink radio resources for a cell;
send, via the uplink radio resources and based on receiving the first message, one or more first data packets;
based on expiration of a time alignment timer, stop uplink transmissions via the uplink radio resources; and
based on receiving a timing advance command:
activate the uplink radio resources; and
send, via the activated uplink radio resources, one or more second data packets.
30. The wireless device of claim 29 , wherein the uplink radio resources are associated with a secondary cell.
31. The wireless device of claim 29 , wherein the instructions, when executed by the one or more processors, cause the wireless device to send the one or more first data packets by sending the one or more first data packets using a modulation and coding scheme indicated by the first message.
32. The wireless device of claim 29 , wherein the instructions, when executed by the one or more processors, cause the wireless device to send the one or more first data packets based on a quantity of permitted repeat transmissions.
33. The wireless device of claim 29 , wherein the first message indicates that:
the uplink radio resources are activated based on receiving at least one radio resource control message; or
the uplink radio resources are activated based on receiving a control signal from a base station.
34. The wireless device of claim 29 , wherein the instructions, when executed by the one or more processors, cause the wireless device to receive a response message associated with the one or more second data packets, wherein the response message comprises downlink control information.
35. The wireless device of claim 29 , wherein the first message comprises at least one of:
a radio resource control (RRC) message; or
a medium access control (MAC) control element (CE).
36. The wireless device of claim 29 , wherein the instructions, when executed by the one or more processors, cause the wireless device to activate the uplink radio resources by re-activating a deactivated cell.