Reservation of radio resources for preemption in a wireless network
A wireless device receives one or more radio resource control (RRC) messages. The RRC messages comprise: one or more first feedback parameters for selecting first feedback radio resources of a sidelink; and one or more second feedback parameters for selecting second feedback radio resources of the sidelink. A sidelink transmission comprising sidelink control information (SCI) indicating a priority level of the sidelink transmission is received. Based on the priority level, one or more radio resources are selected from one of: the first feedback radio resources based on the one or more first feedback parameters; and the second feedback radio resources based on the one or more second feedback parameters. A hybrid automatic repeat request (HARQ) feedback for the sidelink transmission is transmitted via the selected one or more radio resources.
1. A method comprising:
receiving, by a wireless device, one or more radio resource control (RRC) messages comprising:
one or more first feedback parameters for selecting first feedback radio resources of a sidelink; and
one or more second feedback parameters for selecting second feedback radio resources of the sidelink;
receiving a sidelink transmission comprising sidelink control information (SCI) indicating a priority level of the sidelink transmission;
selecting, based on the priority level, one or more radio resources from one of:
the first feedback radio resources based on the one or more first feedback parameters; and
the second feedback radio resources based on the one or more second feedback parameters; and
transmitting a hybrid automatic repeat request (HARQ) feedback for the sidelink transmission via the selected one or more radio resources.
2. The method of claim 1 , wherein the selecting of the one or more radio resources comprises selecting the second feedback radio resources based on the priority level being higher than a threshold.
3. The method of claim 2 , wherein the selecting of the one or more radio resources comprises selecting the first feedback radio resources based on the priority level being lower than or equal to the threshold.
4. The method of claim 3 , wherein the threshold is configured by a base station.
5. The method of claim 3 , wherein the threshold is pre-configured.
6. The method of claim 3 , further comprising determining the threshold based on a second priority level of a second sidelink transmission, wherein a second HARQ message of the second sidelink transmission reserves the selected one or more radio resources.
7. The method of claim 1 , wherein the SCI comprises the one or more second feedback parameters.
8. The method of claim 1 , wherein the SCI indicates, the one or more second feedback parameters, based on the priority level being higher than a priority threshold.
9. The method of claim 1 , wherein the one or more first feedback parameters comprise at least one of:
a first parameter indicating a first periodicity of the first feedback radio resources; and
a second parameter indicating a first minimum number of slots separating the sidelink transmission from the one or more radio resources.
10. The method of claim 1 , wherein the one or more second feedback parameters comprise at least one of:
a third parameter indicating a second periodicity of the second feedback radio resources;
a fourth parameter indicating a second minimum number of slots separating the sidelink transmission from the one or more radio resources; and
a fifth parameter indicating a third number of slots separating the sidelink transmission from the one or more radio resources.
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 one or more radio resource control (RRC) messages comprising:
one or more first feedback parameters for selecting first feedback radio resources of a sidelink; and
one or more second feedback parameters for selecting second feedback radio resources of the sidelink;
receive a sidelink transmission comprising sidelink control information (SCI) indicating a priority level of the sidelink transmission;
select, based on the priority level, one or more radio resources from one of:
the first feedback radio resources based on the one or more first feedback parameters; and
the second feedback radio resources based on the one or more second feedback parameters; and
transmit a hybrid automatic repeat request (HARQ) feedback for the sidelink transmission via the selected one or more radio resources.
12. The wireless device of claim 11 , wherein the selecting of the one or more radio resources comprises selecting the second feedback radio resources based on the priority level being higher than a threshold.
13. The wireless device of claim 12 , wherein the selecting of the one or more radio resources comprises selecting the first feedback radio resources based on the priority level being lower than or equal to the threshold.
14. The wireless device of claim 13 , wherein the threshold is configured by a base station.
15. The wireless device of claim 13 , wherein the threshold is pre-configured.
16. The wireless device of claim 13 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to determine the threshold based on a second priority level of a second sidelink transmission, wherein a second HARQ message of the second sidelink transmission reserves the selected one or more radio resources.
17. The wireless device of claim 11 , wherein the SCI comprises the one or more second feedback parameters.
18. The wireless device of claim 11 , wherein the SCI indicates, the one or more second feedback parameters, based on the priority level being higher than a priority threshold.
19. The wireless device of claim 11 , wherein the one or more first feedback parameters comprise at least one of:
a first parameter indicating a first periodicity of the first feedback radio resources; and
a second parameter indicating a first minimum number of slots separating the sidelink transmission from the one or more radio resources.
20. A system comprising:
a base station comprising:
one or more first processors; and
first memory storing first instructions that, when executed by the one or more first processors, cause the base station to:
transmit one or more radio resource control (RRC) messages comprising:
one or more first feedback parameters for selecting first feedback radio resources of a sidelink; and
one or more second feedback parameters for selecting second feedback radio resources of the sidelink; and
transmit a sidelink transmission comprising sidelink control information (SCI) indicating a priority level of the sidelink transmission; and
a wireless device comprising:
one or more second processors; and
second memory storing second instructions that, when executed by the one or more second processors, cause the wireless device to:
receive the one or more radio resource control (RRC) messages;
receive the sidelink transmission;
select, based on the priority level, one or more radio resources from one of:
the first feedback radio resources based on the one or more first feedback parameters; and
the second feedback radio resources based on the one or more second feedback parameters; and
transmit a hybrid automatic repeat request (HARQ) feedback for the sidelink transmission via the selected one or more radio resources.