Resource reservation for sidelink communications
A wireless device may determine a second reservation period in units of slots based on a first reservation period in milli-second (ms) and a number of sidelink slots within a fixed period. The number of the sidelink slots may be based on a resource pool configuration. The wireless device may transmit a transport block via one or more transmission resources based on the second reservation period.
1. A method comprising:
determining, by a first wireless device, a second reservation period in units of slots based on a first reservation period in milli-second (ms) and a number of sidelink slots within a fixed period, wherein the number of the sidelink slots is based on a resource pool configuration; and
transmitting a transport block via one or more transmission resources based on the second reservation period.
2. The method of claim 1 , wherein the first reservation period is received from a higher layer of the first wireless device.
3. The method of claim 1 , wherein the first reservation period is transmitted to a second wireless device via sidelink control information (SCI).
4. The method of claim 1 , wherein the resource pool configuration indicates one or more sidelink slots within the fixed period.
5. The method of claim 1 , wherein the determining comprises converting the first reservation period in milli-seconds to the second reservation period in units of slots based on the number of the sidelink slots within the fixed period.
6. The method of claim 1 , wherein the fixed period is a 20 ms.
7. The method of claim 1 , wherein:
the number of the sidelink slots within the fixed period is further based on a number of valid sidelink slots; and
a valid sidelink slot of the valid sidelink slots has greater number of uplink symbols than a threshold.
8. The method of claim 7 , wherein the threshold is indicated from a base station.
9. The method of claim 1 , wherein the number of the sidelink slots is further based on a slot format configuration.
10. The method of claim 9 , wherein the slot format configuration is a cell-specific time division duplex (TDD) uplink (UL) and downlink (DL) configuration.
11. A first wireless device comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the first wireless device to:
determine a second reservation period in units of slots based on a first reservation period in milli-second (ms) and a number of sidelink slots within a fixed period, wherein the number of the sidelink slots is based on a resource pool configuration; and
transmit a transport block via one or more transmission resources based on the second reservation period.
12. The first wireless device of claim 11 , wherein the first reservation period is received from a higher layer of the first wireless device.
13. The first wireless device of claim 11 , wherein the first reservation period is transmitted to a second wireless device via sidelink control information (SCI).
14. The first wireless device of claim 11 , wherein the resource pool configuration indicates one or more sidelink slots within the fixed period.
15. The first wireless device of claim 11 , wherein the determining comprises converting the first reservation period in milli-seconds to the second reservation period in units of slots based on the number of the sidelink slots within the fixed period.
16. The first wireless device of claim 11 , wherein:
the number of the sidelink slots within the fixed period is further based on a number of valid sidelink slots; and
a valid sidelink slot of the valid sidelink slots has greater number of uplink symbols than a threshold.
17. The first wireless device of claim 16 , wherein the threshold is indicated from a base station.
18. The first wireless device of claim 11 , wherein the number of the sidelink slots is further based on a slot format configuration.
19. The first wireless device of claim 18 , wherein the slot format configuration is a cell-specific time division duplex (TDD) uplink (UL) and downlink (DL) configuration.
20. A system comprising:
a base station; and
a first wireless device comprising: one or more first processors and first memory storing first instructions that, when executed by the one or more first processors, cause the first wireless device to:
determine a second reservation period in units of slots based on a first reservation period in milli-second (ms) and a number of sidelink slots within a fixed period, wherein the number of the sidelink slots is based on a resource pool configuration; and
transmit a transport block via one or more transmission resources based on the second reservation period; and
a second wireless device comprising: one or more second processors and second memory storing first instructions that, when executed by the one or more second processors, cause the second wireless device to:
determine the second reservation period in units of slots based on the first reservation period in milli-second (ms) and the number of sidelink slots within the fixed period, wherein the number of the sidelink slots is based on the resource pool configuration; and
receive the transport block via the one or more transmission resources based on the second reservation period.