Uplink channel design for slot-based transmission time interval (TTI)
Certain aspects of the present disclosure provide techniques that may be used to help enable low latency communications between a user equipment (UE) and a base station (BS) using quick uplink channels that enable a reduced transmission time interval (TTI). An example method generally includes identifying a plurality of slots in a subframe, receiving a resource configuration for an uplink channel, wherein the resource configuration is associated with a first slot of the plurality of slots, determining a resource for transmitting the uplink channel in a second slot of the plurality of slots, wherein the resource is determined based on the resource configuration associated with the first slot of the plurality of slots, and transmitting the uplink channel in the second slot using the determined resource.
1. A method for wireless communications by a user equipment (UE), comprising:
receiving a resource configuration for a first uplink channel associated with a first slot in a subframe, wherein the first slot corresponds to a first transmission time interval (TTI);
determining a resource for transmitting a second uplink channel in a second slot of the subframe, wherein the second slot corresponds to a second TTI, the resource is determined based at least in part on the resource configuration for the first uplink channel, and the second uplink channel is different from the first uplink channel; and
transmitting the first uplink channel in the first slot of the subframe using the received resource configuration and the second uplink channel in the second slot of the subframe using the determined resource.
2. The method of claim 1 , wherein determining a resource for transmitting the second uplink channel in the second slot comprises calculating a mirrored location of the resource from the resource configuration associated with the first slot.
3. The method of claim 2 , wherein determining a resource for transmitting the second uplink channel in the second slot comprises calculating a second resource within a second resource block based on at least one of a first resource within a first resource block within the first slot or a format of a control channel.
4. The method of claim 1 , wherein determining a resource for transmitting the second uplink channel in the second slot comprises calculating a location of the resource based on an offset from the resource configuration associated with the first slot.
5. The method of claim 1 , wherein determining a resource for transmitting the second uplink channel in the second slot comprises using the resource configuration associated with the first slot for transmitting the second uplink channel in the second slot.
6. An apparatus for wireless communications, comprising:
memory comprising instructions; and
one or more processors coupled to the memory, the one or more processors being configured, individually or collectively, to execute the instructions and cause the apparatus to:
receive a resource configuration for a first uplink channel associated with a first slot in a subframe, wherein the first slot corresponds to a first transmission time interval (TTI),
determine a resource for transmitting a second uplink channel in a second slot of the subframe, wherein the second slot corresponds to a second TTI, the resource is determined based at least in part on the resource configuration for the first uplink channel, and the second uplink channel is different from the first uplink channel, and
transmit the first uplink channel in the first slot of the subframe based on the resource configuration and the second uplink channel in the second slot of the subframe using the determined resource.
7. The apparatus of claim 6 , wherein the one or more processors are configured, individually or collectively, to determine a resource for transmitting the second uplink channel in the second slot by calculating a mirrored location of the resource from the resource configuration associated with the first slot.
8. The apparatus of claim 7 , wherein the one or more processors are configured to determine a resource for transmitting the second uplink channel in the second slot by calculating a second resource within a resource block based on at least one of a first resource with a first resource block within the first slot or a format of a control channel.
9. The apparatus of claim 6 , wherein the one or more processors are configured to determine a resource for transmitting the second uplink channel in the second slot by calculating a location of the resource based on an offset from the resource configuration associated with the first slot.
10. The apparatus of claim 6 , wherein the one or more processors are configured to determine a resource for transmitting the second uplink channel in the second slot by using the resource configuration associated with the first slot for transmitting the second uplink channel in the second slot.
11. An apparatus for wireless communications by a user equipment (UE), comprising:
means for receiving a resource configuration for a first uplink channel associated with a first slot in a subframe, wherein the first slot corresponds to a first transmission time interval (TTI);
means for determining a resource for transmitting a second uplink channel in a second slot of the subframe, wherein the second slot corresponds to a second TTI, the resource is determined based at least in part on the resource configuration for the first uplink channel, and the second uplink channel is different from the first uplink channel; and
means for transmitting the first uplink channel in the first slot based on the resource configuration and the second uplink channel in the second slot using the determined resource.
12. The apparatus of claim 11 , wherein the means for determining a resource for transmitting the second uplink channel in the second slot comprises means for calculating a mirrored location of the resource from the resource configuration associated with the first slot.
13. The apparatus of claim 12 , wherein the means for determining a resource for transmitting the second uplink channel in the second slot comprises means for calculating a second resource within a second resource block based on at least one of a first resource within a first resource block within the first slot or a format of a control channel.
14. The apparatus of claim 11 , wherein the means for determining a resource for transmitting the second uplink channel in the second slot comprises means for calculating a location of the resource based on an offset from the resource configuration associated with the first slot.
15. The apparatus of claim 11 , wherein the means for determining a resource for transmitting the second uplink channel in the second slot comprises means for using the resource configuration associated with the first slot for transmitting the second uplink channel in the second slot.
16. A non-transitory computer-readable medium having instructions stored thereon which, when executed by one or more processors, performs an operation for wireless communications by a user equipment (UE), comprising:
receiving a resource configuration for a first uplink channel associated with a first slot in a subframe, wherein the first slot corresponds to a first transmission time interval (TTI);
determining a resource for transmitting a second uplink channel in a second slot of the subframe, wherein the second slot corresponds to a second TTI, the resource is determined based at least in part on the resource configuration for the first uplink channel, and the second uplink channel is different from the first uplink channel; and
transmitting the first uplink channel in the first slot based on the resource configuration and the second uplink channel in the second slot using the determined resource.
17. The non-transitory computer-readable medium of claim 16 , wherein determining a resource for transmitting the second uplink channel in the second slot comprises calculating a mirrored location of the resource from the resource configuration associated with the first slot.
18. The non-transitory computer-readable medium of claim 17 , wherein determining a resource for transmitting the second uplink channel in the second slot comprises calculating a second resource within a second resource block based on at least one of a first resource within a first resource block within the first slot or a format of a control channel.
19. The non-transitory computer-readable medium of claim 16 , wherein determining a resource for transmitting the second uplink channel in the second slot comprises calculating a location of the resource based on an offset from the resource configuration associated with the first slot.
20. The non-transitory computer-readable medium of claim 16 , wherein determining a resource for transmitting the second uplink channel in the second slot comprises using the resource configuration associated with the first slot for transmitting the second uplink channel in the second slot.