Physical and MAC layer processes in a wireless device
A wireless device receives one or more messages from a base station. The one or more messages comprise: first configuration parameters of one or more cells grouped into a timing advance group; second configuration parameters of a time alignment timer for the timing advance group; and third configuration parameters of semi-persistent channel state information (CSI) reports for transmission via a first cell of the one or more cells. A downlink control information is received. The downlink control information indicates activation of a plurality of resources of the first cell for the semi-persistent CSI reports. A semi-persistent CSI report, of the semi-persistent CSI reports, is transmitted via a first resource of the plurality of resources. In response to the time alignment timer expiring, second resources of the plurality of resources that occur after the time alignment timer expires are cleared.
1. A method comprising:
receiving, by a wireless device from a base station, one or more messages comprising:
first configuration parameters of one or more cells grouped into a timing advance group;
second configuration parameters of a time alignment timer for the timing advance group; and
third configuration parameters of semi-persistent channel state information (CSI) reports for transmission via a first cell of the one or more cells;
receiving a first downlink control information indicating activation of a plurality of resources of the first cell for the semi-persistent CSI reports;
transmitting a semi-persistent CSI report, of the semi-persistent CSI reports, via a first resource of the plurality of resources; and
in response to the time alignment timer expiring, clearing second resources of the plurality of resources that occur after the time alignment timer expires.
2. The method of claim 1 , further comprising receiving a second downlink control information indicating activation of a second plurality of resources of the first cell for second semi-persistent CSI reports, wherein the second plurality of resources are determined based on the third configuration parameters.
3. The method of claim 1 , further comprising starting the time alignment timer in response to receiving a timing advance control element.
4. The method of claim 3 , further comprising receiving a second downlink control information indicating activation of a second plurality of resources of the first cell for second semi-persistent CSI reports, wherein the second plurality of resources are determined based on the third configuration parameters.
5. The method of claim 1 , wherein the timing advance group is a primary timing advance group comprising a primary cell and one or more secondary cells.
6. The method of claim 1 , wherein the plurality of resources are for transmission of the semi-persistent CSI reports via a physical uplink shared channel.
7. The method of claim 1 , wherein the timing advance group is a secondary timing advance group comprising one or more secondary cells.
8. The method of claim 7 , further comprising receiving a second downlink control information indicating activation of a second plurality of resources of the first cell for second semi-persistent CSI reports, wherein the second plurality of resources are determined based on the third configuration parameters.
9. The method of claim 7 , further comprising starting the time alignment timer in response to receiving a timing advance control element.
10. The method of claim 9 , further comprising receiving a second downlink control information indicating activation of a second plurality of resources of the first cell for second semi-persistent CSI reports, wherein the second plurality of resources are determined based on the third configuration parameters.
11. The method of claim 7 , wherein the timing advance group is a primary timing advance group comprising a primary cell and one or more secondary cells.
12. The method of claim 7 , wherein the plurality of resources are for transmission of the semi-persistent CSI reports via a physical uplink shared channel.
13. The method of claim 7 , wherein the second resources are available for uplink scheduling by the base station in response to the clearing the second resources.
14. The method of claim 7 , wherein:
the third configuration parameters comprise a first radio network temporary identifier; and
the first downlink control information is associated with the first radio network temporary identifier.
15. The method of claim 7 , wherein the third configuration parameters comprise a periodicity and offset parameter indicating resources for transmission of the semi-persistent CSI reports.
16. The method of claim 7 , wherein:
the third configuration parameters comprise a set of trigger states for semi-persistent CSI reporting; and
the first downlink control information indicates a first trigger state in the set of trigger states.
17. The method of claim 1 , wherein the second resources are available for uplink scheduling by the base station in response to the clearing the second resources.
18. The method of claim 1 , wherein:
the third configuration parameters comprise a first radio network temporary identifier; and
the first downlink control information is associated with the first radio network temporary identifier.
19. The method of claim 1 , wherein the third configuration parameters comprise a periodicity and offset parameter indicating resources for transmission of the semi-persistent CSI reports.
20. The method of claim 1 , wherein:
the third configuration parameters comprise a set of trigger states for semi-persistent CSI reporting; and
the first downlink control information indicates a first trigger state in the set of trigger states.