Scheduling request on a secondary cell of a wireless device
A plurality of cells comprise a primary cell with no configured scheduling request (SR) resources and a secondary cell with configured SR resources. A wireless device receives an activation command indicating activation of the secondary cell. The wireless device initiates a random access procedure when in a subframe: an SR process is pending; no uplink data channel resources are available for transmission; and a time alignment timer of an sTAG comprising the secondary cell is not running.
1. A method comprising:
receiving, by a wireless device, at least one message comprising configuration parameters of a plurality of cells, the plurality of cells comprising:
a primary cell with no configured scheduling request (SR) resources; and
a secondary cell with configured SR resources, the secondary cell being in a secondary timing advance group (sTAG);
receiving an activation command indicating activation of the secondary cell; and
initiating a random access procedure when in a subframe:
an SR process is pending;
no uplink data channel resources are available for transmission; and
a time alignment timer of the sTAG is not running.
2. The method of claim 1 , wherein the secondary cell is in an activated state in the subframe.
3. The method of claim 1 , further comprising transmitting a random access preamble in random access resources of the primary cell.
4. The method of claim 1 , wherein the plurality of cells are grouped into a plurality of physical uplink control channel (PUCCH) groups comprising:
a primary PUCCH group comprising the primary cell with a primary PUCCH transmitted to a base station; and
a secondary PUCCH group comprising the secondary cell with a secondary PUCCH transmitted to the base station.
5. The method of claim 1 , wherein the plurality of cells are grouped into a plurality of timing advance groups (TAGs) comprising:
a primary TAG comprising the primary cell; and
the sTAG comprising the secondary cell.
6. The method of claim 1 , wherein the SR resources are configured on the secondary cell in the subframe.
7. The method of claim 1 , further comprising receiving a random access response comprising an uplink grant.
8. The method of claim 1 , wherein the at least one message comprises a time alignment timer parameter for the sTAG.
9. The method of claim 1 , wherein the configuration parameters comprise:
first configuration parameters of a primary PUCCH for the primary cell; and
second configuration parameters of a secondary PUCCH for the secondary cell.
10. The method of claim 1 , further comprising initiating the SR process when the wireless device has one or more uplink packets for transmission.
11. A wireless device comprising:
one or more processors; and
memory storing instructions that, when executed, cause the wireless device to:
receive at least one message comprising configuration parameters of a plurality of cells, the plurality of cells comprising:
a primary cell with no configured scheduling request (SR) resources; and
a secondary cell with configured SR resources, the secondary cell being in a secondary timing advance group (sTAG);
receive an activation command indicating activation of the secondary cell; and
initiate a random access procedure when in a subframe:
an SR process is pending;
no uplink data channel resources are available for transmission; and
a time alignment timer of the sTAG is not running.
12. The wireless device of claim 11 , wherein the secondary cell is in an activated state in the subframe.
13. The wireless device of claim 11 , wherein the instructions, when executed, further cause the wireless device to transmit a random access preamble in random access resources of the primary cell.
14. The wireless device of claim 11 , wherein the plurality of cells are grouped into a plurality of physical uplink control channel (PUCCH) groups comprising:
a primary PUCCH group comprising the primary cell with a primary PUCCH transmitted to a base station; and
a secondary PUCCH group comprising the secondary cell with a secondary PUCCH transmitted to the base station.
15. The wireless device of claim 11 , wherein the plurality of cells are grouped into a plurality of timing advance groups (TAGs) comprising:
a primary TAG comprising the primary cell; and
the sTAG comprising the secondary cell.
16. The wireless device of claim 11 , wherein the SR resources are configured on the secondary cell in the subframe.
17. The wireless device of claim 11 , wherein the instructions, when executed, further cause the wireless device to receive a random access response comprising an uplink grant.
18. The wireless device of claim 11 , wherein the at least one message comprises a time alignment timer parameter for the sTAG.
19. The wireless device of claim 11 , wherein the configuration parameters comprise:
first configuration parameters of a primary PUCCH for the primary cell; and
second configuration parameters of a secondary PUCCH for the secondary cell.
20. The wireless device of claim 11 , wherein the instructions, when executed, further cause the wireless device to initiate the SR process when the wireless device has one or more uplink packets for transmission.