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;
in response to receiving a second message indicating an activation of the cell:
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, the second message.
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 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;
in response to receiving a second message indicating an activation of the cell:
activate the cell; and
activate the uplink radio resources; and
send, via the uplink radio resources, one or more data packets.
12 . The wireless device of claim 11 , wherein the cell comprises a secondary cell.
13 . The wireless device of claim 11 , 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.
14 . The wireless device of claim 11 , 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.
15 . The wireless device of claim 11 , wherein the instructions, when executed by the one or more processors, cause the wireless device to:
receive, via a downlink control channel, the second message; and
based on receiving the control signal, activate the uplink radio resources.
16 . The wireless device of claim 11 , 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.
17 . The wireless device of claim 11 , 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.
18 . The wireless device of claim 11 , wherein the first message comprises at least one radio resource control message.
19 . The wireless device of claim 11 , wherein the second message comprises at least one medium access control (MAC) control element (CE).
20 . The wireless device of claim 11 , 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.
21 . A non-transitory computer-readable medium storing instructions that, when executed, configure a wireless device to:
receive a first message indicating uplink radio resources for a cell;
in response to receiving a second message indicating an activation of the cell:
activate the cell; and
activate the uplink radio resources; and
send, via the uplink radio resources, one or more data packets.
22 . The non-transitory computer-readable medium of claim 21 , wherein the cell comprises a secondary cell.
23 . The non-transitory computer-readable medium of claim 21 , wherein the instructions, when executed, configure 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.
24 . The non-transitory computer-readable medium of claim 21 , wherein the instructions, when executed, configure the wireless device to send the one or more data packets based on a quantity of permitted repeat transmissions.
25 . The non-transitory computer-readable medium of claim 21 , wherein the instructions, when executed, configure the wireless device to:
receive, via a downlink control channel, the second message.
26 . The non-transitory computer-readable medium of claim 21 , wherein the instructions, when executed, configure the wireless device to receive a response message associated with the one or more data packets, wherein the response message comprises downlink control information.
27 . The non-transitory computer-readable medium of claim 21 , wherein the instructions, when executed, configure the wireless device to activate the cell by re-activating a deactivated cell.
28 . The non-transitory computer-readable medium of claim 21 , wherein the first message comprises at least one radio resource control message.
29 . The non-transitory computer-readable medium of claim 21 , wherein the second message comprises at least one medium access control (MAC) control element (CE).
30 . The non-transitory computer-readable medium of claim 21 , wherein the instructions, when executed, configure 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.
31 . A system comprising:
a wireless device; and
a base station,
wherein the wireless device is configured to:
receive a first message indicating uplink radio resources for a cell;
in response to receiving a second message indicating an activation of the cell:
activate the cell; and
activate the uplink radio resources; and
send, via the uplink radio resources, one or more data packets; and
wherein the base station is configured to send the first message.
32 . The system of claim 31 , wherein the cell comprises a secondary cell.
33 . The system of claim 31 , wherein the wireless device is configured 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.
34 . The system of claim 31 , wherein the wireless device is configured to send the one or more data packets based on a quantity of permitted repeat transmissions.
35 . The system of claim 31 , wherein the wireless device is configured to:
receive, via a downlink control channel, the second message.
36 . The system of claim 31 , wherein the base station is configured to send a response message associated with the one or more data packets, wherein the response message comprises downlink control information.
37 . The system of claim 31 , wherein the wireless device is configured to activate the cell by re-activating a deactivated cell.
38 . The system of claim 31 , wherein the first message comprises at least one radio resource control message.
39 . The system of claim 31 , wherein the second message comprises at least one medium access control (MAC) control element (CE).
40 . The system of claim 31 , wherein the wireless device is configured 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.