Uplink control resource allocation for dynamic time-division duplex systems
Methods and apparatuses for managing uplink scheduling for one or more user equipment served by a network entity in a wireless communications system are presented. For instance, an example method is presented that includes generating, by the network entity, an uplink bandwidth allocation map, the uplink bandwidth allocation map defining an uplink bandwidth allocation for at least one of the one or more user equipment for at least one of a plurality of uplink transmission window lengths. In addition, the example method includes transmitting the uplink bandwidth allocation map to at least one of the one or more user equipment.
1. A method of wireless communication at a user equipment (UE), the method comprising:
receiving, from a network entity, an indication of an uplink control channel transmission window in a plurality of uplink control channel transmission windows defined for the UE by the network entity, wherein each of the plurality of uplink control channel transmission windows corresponds to an uplink control bandwidth allocation on an uplink control channel during the uplink control channel transmission window in which one or more UEs served by the network entity, including the UE, communicate uplink control information; and
transmitting, to the network entity, a control signal on the uplink control channel during the uplink control channel transmission window in accordance with the uplink control bandwidth allocation.
2. The method of claim 1 , further comprising:
receiving, from the network entity, an uplink control channel bandwidth allocation map, the uplink control channel bandwidth allocation map defining the uplink control bandwidth allocation for each of the plurality of uplink control channel transmission windows defined for the UE based at least in part on corresponding uplink control channel transmission window lengths; and
determining, based on the uplink control channel bandwidth allocation map, the uplink control bandwidth allocation corresponding to the uplink control channel transmission window.
3. The method of claim 1 , wherein the plurality of uplink control channel transmission windows are semi-statically allocated.
4. The method of claim 1 , wherein the uplink control bandwidth allocation is one of a contiguous bandwidth allocation or an allocation of a plurality of discontinuous bandwidth ranges.
5. The method of claim 1 , wherein each of the plurality of uplink control channel transmission windows has a window length of one or more symbols.
6. The method of claim 5 , wherein the uplink control bandwidth allocation comprises a bandwidth range, a number of resource elements, or a number of resource element groups.
7. The method of claim 5 , wherein the uplink control bandwidth allocation comprises resource elements or resource element groups within the one or more symbols.
8. The method of claim 1 , wherein transmitting the control signal comprises transmitting acknowledgement (ACK/NACK) or channel quality information (CQI) messages.
9. The method of claim 1 , wherein transmission by the UE during at least one of the plurality of uplink control channel transmission windows is combined with transmissions of other UEs served by the network entity using code division multiplexing.
10. The method of claim 9 , wherein the code division multiplexing comprises a time-domain code division multiplexing.
11. The method of claim 9 , further comprising receiving, from the network entity, a code for the code division multiplexing.
12. The method of claim 1 , wherein different values of the indication are associated with different ones of the plurality of uplink control channel transmission windows.
13. The method of claim 1 , wherein the uplink control bandwidth allocation comprises resource elements or resource element groups.
14. The method of claim 1 , wherein the plurality of uplink control channel transmission windows is separate from an uplink data channel.
15. An apparatus for wireless communication at a user equipment (UE), comprising:
a memory; and
a processor coupled to the memory and configured to:
receive, from a network entity, an indication of an uplink control channel transmission window in a plurality of uplink control channel transmission windows defined for the UE by the network entity, wherein each of the plurality of uplink control channel transmission windows corresponds to an uplink control bandwidth allocation on an uplink control channel during the uplink control channel transmission window in which one or more UEs served by the network entity, including the UE, communicate uplink control information; and
transmit, to the network entity, a control signal on the uplink control channel during the uplink control channel transmission window in accordance with the uplink control bandwidth allocation.
16. The apparatus of claim 15 , wherein the processor is further configured to:
receive, from the network entity, an uplink control channel bandwidth allocation map, the uplink control channel bandwidth allocation map defining the uplink control bandwidth allocation for each of the plurality of uplink control channel transmission windows defined for the UE based at least in part on corresponding uplink control channel transmission window lengths; and
query the uplink control channel bandwidth allocation map to determine the uplink control bandwidth allocation corresponding to the uplink control channel transmission window.
17. The apparatus of claim 16 , wherein the plurality of uplink control channel transmission windows are semi-statically allocated.
18. The apparatus of claim 15 , wherein the uplink control bandwidth allocation is at least one of a contiguous bandwidth allocation or an allocation of a plurality of discontinuous bandwidth ranges.
19. The apparatus of claim 15 , wherein each of the plurality of uplink control channel transmission windows has a window length of one or more symbols.
20. The apparatus of claim 15 , wherein the processor configured to transmit the control signal is further configured to transmit acknowledgement (ACK/NACK) or channel quality information (CQI) messages.
21. An apparatus for wireless communication at a user equipment (UE), comprising:
means for receiving, from a network entity, an indication of an uplink control channel transmission window in a plurality of uplink control channel transmission windows defined for the UE by the network entity, wherein each of the plurality of uplink control channel transmission windows corresponds to an uplink control bandwidth allocation on an uplink control channel during the uplink control channel transmission window in which one or more UEs served by the network entity, including the UE, communicate uplink control information; and
means for transmitting, to the network entity, a control signal on the uplink control channel during the uplink control channel transmission window in accordance with the uplink control bandwidth allocation.
22. The apparatus of claim 21 , further comprising:
means for receiving, from the network entity, an uplink control channel bandwidth allocation map, the uplink control channel bandwidth allocation map defining the uplink control bandwidth allocation for each of the plurality of uplink control channel transmission windows defined for the UE based at least in part on corresponding uplink control channel transmission window lengths; and
means for querying the uplink control channel bandwidth allocation map to determine the uplink control bandwidth allocation corresponding to the uplink control channel transmission window.
23. The apparatus of claim 22 , wherein the plurality of uplink control channel transmission windows are semi-statically allocated.
24. The apparatus of claim 21 , wherein the uplink control bandwidth allocation is at least one of a contiguous bandwidth allocation or an allocation of a plurality of discontinuous bandwidth ranges.
25. The apparatus of claim 21 , wherein each of the plurality of uplink control channel transmission windows has a window length of one or more symbols.
26. The apparatus of claim 21 , wherein means for transmitting the control signal is configured to transmit acknowledgement (ACK/NACK) or channel quality information (CQI) messages.
27. A non-transitory computer-readable medium storing computer-executable code for wireless communication at a user equipment (UE), comprising:
code for receiving, from a network entity, an indication of an uplink control channel transmission window in a plurality of uplink control channel transmission windows defined for the UE by the network entity, wherein each of the plurality of uplink control channel transmission windows corresponds to an uplink control bandwidth allocation on an uplink control channel during the uplink control channel transmission window in which one or more UEs served by the network entity, including the UE, communicate uplink control information; and
code for transmitting, to the network entity, a control signal on the uplink control channel during the uplink control channel transmission window in accordance with the uplink control bandwidth allocation.
28. The non-transitory computer-readable medium of claim 27 , further comprising:
code for receiving, from the network entity, an uplink control channel bandwidth allocation map, the uplink control channel bandwidth allocation map defining the uplink control bandwidth allocation for each of the plurality of uplink control channel transmission windows defined for the UE based at least in part on corresponding uplink control channel transmission window lengths; and
code for querying the uplink control channel bandwidth allocation map to determine the uplink control bandwidth allocation corresponding to the uplink control channel transmission window.
29. The non-transitory computer-readable medium of claim 28 , wherein the plurality of uplink control channel transmission windows are semi-statically allocated.
30. The non-transitory computer-readable medium of claim 28 , wherein each of the plurality of uplink control channel transmission windows has a window length of one or more symbols.
31. The non-transitory computer-readable medium of claim 28 , wherein the code for transmitting comprises code for transmitting acknowledgement (ACK/NACK) or channel quality information (CQI) messages.
32. The non-transitory computer-readable medium of claim 27 , wherein the uplink control bandwidth allocation is at least one of a contiguous bandwidth allocation or an allocation of a plurality of discontinuous bandwidth ranges.