Resource reselection triggering conditions for sidelink communications
A wireless device may receive, from a base station, a first configuration message comprising a first cell specific time division duplex (TDD) uplink and downlink configuration of a cell. The wireless device may receive, from the base station, a second configuration message comprising a second cell specific TDD uplink and downlink configuration of the cell. The wireless device may determine the second cell specific TDD uplink and downlink configuration of the cell is different from the first cell specific TDD uplink and downlink configuration of the cell. Based on the determining, the wireless device may trigger sidelink resource reselection of one or more reserved resources of a resource pool for one or more transport blocks. The wireless device may transmit the one or more transport blocks.
1. A method comprising:
receiving, by a wireless device from a base station, a first configuration message comprising a first cell specific time division duplex (TDD) uplink and downlink configuration of a cell;
receiving, by the wireless device from the base station, a second configuration message comprising a second cell specific TDD uplink and downlink configuration of the cell;
triggering, in response to determining that the second cell specific TDD uplink and downlink configuration is different from the first cell specific TDD uplink and downlink configuration, sidelink resource reselection of one or more reserved resources of a resource pool for one or more transport blocks; and
transmitting the one or more transport blocks.
2. The method of claim 1 , wherein each of the first cell specific TDD uplink and downlink configuration and the second cell specific TDD uplink and downlink configuration comprise one or more patterns and each pattern of the one or more patterns comprises:
a slot configuration period;
a number of uplink slots; and
a numbers of uplink symbols.
3. The method of claim 2 , wherein at least one parameter of the slot configuration period, the number of uplink slots, or the number of uplink symbols is different between the first cell specific TDD uplink and downlink configuration and the second cell specific TDD uplink and downlink configuration.
4. The method of claim 1 , wherein the one or more reserved resources comprise one or more transmission resources for a next transport block.
5. The method of claim 1 , wherein the one or more reserved resources comprise one or more retransmission resources for a transport block.
6. The method of claim 1 , further comprising receiving from the base station, a third configuration message comprising a first sidelink bandwidth part.
7. The method of claim 6 , further comprising receiving from the base station, a fourth configuration message comprising a second sidelink bandwidth part.
8. The method of claim 7 , further comprising determining the second sidelink bandwidth part is different from the first sidelink bandwidth part.
9. The method of claim 8 , further comprising triggering, based on the determining, sidelink resource reselection of the one or more reserved resources of the resource pool for the one or more transport blocks.
10. The method of claim 1 , wherein the one or more transport blocks are transmitted via one or more physical layer sidelink shared channels.
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, from a base station, a first configuration message comprising a first cell specific time division duplex (TDD) uplink and downlink configuration of a cell;
receive, from the base station, a second configuration message comprising a second cell specific TDD uplink and downlink configuration of the cell;
trigger, in response to determining that the second cell specific TDD uplink and downlink configuration is different from the first cell specific TDD uplink and downlink configuration, sidelink resource reselection of one or more reserved resources of a resource pool for one or more transport blocks; and
transmit the one or more transport blocks.
12. The wireless device of claim 11 , wherein each of the first cell specific TDD uplink and downlink configuration and second cell specific TDD uplink and downlink configuration comprise one or more patterns and each pattern of the one or more patterns comprises:
a slot configuration period;
a number of uplink slots; and
a numbers of uplink symbols.
13. The wireless device of claim 12 , wherein at least one parameter of the slot configuration period, the number of uplink slots, or the number of uplink symbols is different between the first cell specific TDD uplink and downlink configuration and the second cell specific TDD uplink and downlink configuration.
14. The wireless device of claim 11 , wherein the one or more reserved resources comprise one or more transmission resources for a next transport block.
15. The wireless device of claim 11 , wherein the one or more reserved resources comprise one or more retransmission resources for a transport block.
16. The wireless device of claim 11 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to receive from the base station, a third configuration message comprising a first sidelink bandwidth part.
17. The wireless device of claim 16 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to receive from the base station, a fourth configuration message comprising a second sidelink bandwidth part.
18. The wireless device of claim 17 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to determine the second sidelink bandwidth part is different from the first sidelink bandwidth part.
19. The wireless device of claim 18 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to trigger, based on the determining, sidelink resource reselection of the one or more reserved resources of the resource pool for the one or more transport blocks.
20. A system comprising:
a base station comprising:
one or more first processors; and
first memory storing instructions that, when executed by the one or more first processors, cause the base station to:
transmit a first configuration message comprising a first cell specific time division duplex (TDD) uplink and downlink configuration of a cell; and
transmit a second configuration message comprising a second cell specific TDD uplink and downlink configuration of the cell; and
a wireless device comprising:
one or more second processors; and
second memory storing instructions that, when executed by the one or more second processors, cause the wireless device to:
receive, from the base station, the first configuration message comprising the first cell specific TDD uplink and downlink configuration of the cell;
receive, from the base station, the second configuration message comprising the second cell specific TDD uplink and downlink configuration of the cell;
trigger, in response to determining that the second cell specific TDD uplink and downlink configuration is different from the first cell specific TDD uplink and downlink configuration, sidelink resource reselection of one or more reserved resources of a resource pool for one or more transport blocks; and
transmit the one or more transport blocks.