Timer handling in multiple active grant configurations
Systems and methods for determining retransmission configuration(s) are provided herein. Some embodiments relate to configuring one or more timers associated with configured grant configurations. A network node can configure a wireless device with a plurality of different configured grant configurations and associated parameters. The wireless device can use a first configured grant configuration for transmitting data and a second configured grant configuration for retransmitting the data.
1. A method performed by a wireless device, comprising:
obtaining configuration information including a plurality of configured granted (CG) configurations;
selecting data from a logical channel mapped to a first CG configuration for transmission;
transmitting the selected data using the first CG configuration and, in response to transmitting the selected data, starting a retransmission timer in accordance with the first CG configuration;
determining that a retransmission is required;
selecting a second CG configuration to use for the retransmission, the second CG configuration being different than the first CG configuration;
retransmitting the data using the selected second CG configuration; and
in response to retransmitting the data, restarting the retransmission timer in accordance with the second CG configuration.
2. The method of claim 1 , wherein the configuration information is obtained from a network node.
3. The method of claim 1 , wherein the logical channel is mapped to one or more of the plurality of CG configurations.
4. The method of claim 1 , wherein one or more of the plurality of CG configurations share a same Hybrid Automatic Repeat Request (HARQ) process.
5. The method of claim 1 , further comprising, in response to transmitting the selected data, starting a CG timer in accordance with the first CG configuration, the CG timer defining a maximum time period during which the wireless device can trigger autonomous retransmission.
6. The method of claim 1 , wherein the retransmission timer defines a time period after which the wireless device triggers a next retransmission attempt.
7. The method of claim 1 , further comprising, stopping the retransmission timer in response to one of:
receiving HARQ feedback indicating an acknowledgement (ACK) or negative acknowledgment (NACK); or
receiving a grant indicating a new transmission or retransmission for the transmitted data.
8. The method of claim 1 , wherein determining that the retransmission is required is in response to an expiration of the retransmission timer.
9. The method of claim 1 , wherein the second CG configuration is selected in accordance with selecting an earliest time resource belonging to any of the plurality of CG configurations.
10. The method of claim 1 , wherein the second CG configuration is selected in accordance with the first and second CG configurations sharing a same HARQ process.
11. The method of claim 1 , wherein the second CG configuration is selected in accordance with the second CG configuration providing a same transport block size as the transmitted data.
12. The method of claim 1 , wherein the logical channel is not mapped to the second CG configuration.
13. The method of claim 1 , wherein, in response to retransmitting the data, a CG timer is not updated.
14. A wireless device comprising a radio interface and processing circuitry configured to:
obtain configuration information including a plurality of configured granted (CG) configurations;
select data from a logical channel mapped to a first CG configuration for transmission;
transmit the selected data using the first CG configuration and, in response to transmitting the selected data, start a retransmission timer in accordance with the first CG configuration;
determine that a retransmission is required;
select a second CG configuration to use for the retransmission, the second CG configuration being different than the first CG configuration;
retransmit the data using the selected second CG configuration; and
in response to retransmitting the data, restart the retransmission timer in accordance with the second CG configuration.
15. The wireless device of claim 14 , wherein the configuration information is obtained from a network node.
16. The wireless device of claim 14 , wherein the logical channel is mapped to one or more of the plurality of CG configurations.
17. The wireless device of claim 14 , wherein one or more of the plurality of CG configurations share a same Hybrid Automatic Repeat Request (HARQ) process.
18. The wireless device of claim 14 , further configured to, in response to transmitting the selected data, start a CG timer in accordance with the first CG configuration, the CG timer defining a maximum time period during which the wireless device can trigger autonomous retransmission.
19. The wireless device of claim 14 , wherein the retransmission timer defines a time period after which the wireless device triggers a next retransmission attempt.
20. The wireless device of claim 14 , further configured to stop the retransmission timer in response to one of:
receiving HARQ feedback indicating an acknowledgement (ACK) or negative acknowledgment (NACK); or
receiving a grant indicating a new transmission or retransmission for the transmitted data.
21. The wireless device of claim 14 , wherein the determination that the retransmission is required is in response to an expiration of the retransmission timer.
22. The wireless device of claim 14 , wherein the second CG configuration is selected in accordance with selecting an earliest time resource belonging to any of the plurality of CG configurations.
23. The wireless device of claim 14 , wherein the second CG configuration is selected in accordance with the first and second CG configurations sharing a same HARQ process.
24. The wireless device of claim 14 , wherein the second CG configuration is selected in accordance with the second CG configuration providing a same transport block size as the transmitted data.
25. The wireless device of claim 14 , wherein the logical channel is not mapped to the second CG configuration.
26. The wireless device of claim 14 , wherein, in response to retransmitting the data, a CG timer is not updated.