Subframe dependent physical uplink control channel (PUCCH) region design
According to certain aspects, resources allocated to a user equipment (UE) for physical uplink control channel (PUCCH) transmissions may be determined in a subframe-type dependent manner. As a result, PUCCH regions for different subframes may vary based on the subframe types.
1. A method for allocating uplink resources in a wireless communications network, comprising:
determining, by a base station, at least one of a location or a size of a region for an allocation of physical uplink control channel (PUCCH) resources of a subframe based on a subframe type of a plurality of subframe types, wherein the plurality of subframe types comprise at least a first type in which transmissions in a first cell are protected by restricting transmissions in a second cell; and
signaling the resource allocation to a user equipment (UE).
2. The method of claim 1 , wherein:
the wireless communications network comprises a heterogeneous network; and
the first and second cells are of different power class types.
3. The method of claim 1 , wherein:
the plurality of subframe types comprise at least second and third types; and
a common set of PUCCH resources are allocated to subframes of the second and third types.
4. The method of claim 1 , wherein signaling the resource allocation to the UE comprises signaling an indication of a starting point for a dynamic region for transmitting acknowledgements.
5. The method of claim 4 , wherein:
the indication is set to a maximum value;
the resources allocated for the PUCCH in a subframe of the first type utilize a first region defined by the maximum value; and
the resources allocated for the PUCCH in a subframe of a second type utilize a second region that comprises a subset of resources of the first region.
6. The method of claim 5 , wherein resources of a third region are allocated for a physical uplink shared channel (PUSCH) in the subframe of the second type, wherein the third region comprises a subset of resources of the first region and is non-overlapping with the second region.
7. The method of claim 4 , wherein:
the indication is set to a minimum value; and
the resources allocated for the PUCCH in a subframe of the first type comprise resources in a first region defined by the minimum value and a second region that is outside the first region and outside the dynamic region for transmitting acknowledgements.
8. The method of claim 1 , wherein:
the UE is of a first type; and
resources allocated for PUCCH resources of the UE in subframes of at least the first type are shared with resources allocated for a dynamic region for transmitting acknowledgements by a UE of a second type.
9. The method of claim 8 , wherein resources allocated for PUCCH resources of the UE in subframes of at least the second type are not shared with resources allocated for a dynamic region for transmitting acknowledgements by the UE of the first or second type.
10. The method of claim 8 , further comprising:
scheduling a starting control channel element (CCE) of a physical downlink control channel (PDCCH) for the UE of the second type such that a dynamic acknowledgement resource derived based on the starting CCE does not collide with resources shared with PUCCH resources allocated to the UE of the first type.
11. The method of claim 8 , further comprising:
signaling a minimum PUCCH region allocated for subframes of at least the first and a second subframe type; and
signaling an additional PUCCH region allocated for subframes of at least the first subframe type.
12. A method for determining allocated uplink resources in a wireless communications network, comprising:
determining, by a user equipment (UE), at least one of a location or a size of a region for an allocation of physical uplink control channel (PUCCH) resources of a subframe based on a subframe type of a plurality of subframe types, wherein the plurality of subframe types comprise at least a first type in which transmissions in a first cell are protected by restricting transmissions in a second cell; and
transmitting, in the subframe, information to a base station of the first cell using the allocated PUCCH resources for that subframe type.
13. The method of claim 12 , wherein:
the wireless communications network comprises a heterogeneous network; and
the first and second cells are of different power class types.
14. The method of claim 12 , wherein:
the plurality of subframe types comprise at least second and third types; and
a common set of PUCCH resources are allocated to subframes of the second and third types.
15. The method of claim 12 , further comprising receiving, from a base station of the first cell, an indication of a starting point for a dynamic region for transmitting acknowledgements.
16. The method of claim 15 , wherein:
the indication is set to a maximum value;
the resources allocated for the PUCCH in a subframe of the first type utilize a first region defined by the maximum value; and
the resources allocated for the PUCCH in a subframe of a second type utilize a second region that comprises a subset of resources of the first region.
17. The method of claim 16 , wherein resources of a third region are allocated for a physical uplink shared channel (PUSCH) in the subframe of the second type, wherein the third region comprises a subset of resources of the first region and is non-overlapping with the second region.
18. The method of claim 15 , wherein:
the indication is set to a minimum value; and
the resources allocated for the PUCCH in a subframe of the first type comprise resources in a first region defined by the minimum value and a second region that is outside the first region and outside the dynamic region for transmitting acknowledgements.
19. The method of claim 12 , wherein:
the UE is of a first type; and
resources allocated for PUCCH resources of the UE in subframes of at least the first type are shared with resources allocated for a dynamic region for transmitting acknowledgements by a UE of a second type.
20. The method of claim 19 , wherein resources allocated for PUCCH resources of the UE in subframes of at least the second type are not shared with resources allocated for a dynamic region for transmitting acknowledgements by the UE of the first or second type.
21. The method of claim 19 , further comprising:
receiving a physical downlink control channel (PDCCH) for the UE of the second type; and
deriving a dynamic acknowledgement resource based on a starting CCE of the PDCCH, wherein the starting CCE is scheduled such that the derived dynamic acknowledgement resource does not collide with resources shared with PUCCH resources allocated to the UE of the first type.
22. The method of claim 19 , wherein the determining comprises:
receiving, from the base station of the first cell, an indication of a minimum PUCCH region allocated for subframes of at least the first and a second subframe type and an indication of an additional PUCCH region allocated for subframes of at least the first subframe type.
23. An apparatus for allocating uplink resources in a wireless communications network, comprising:
means for determining at least one of a location or a size of a region for an allocation of physical uplink control channel (PUCCH) resources of a subframe based on a subframe type of a plurality of subframe types, wherein the plurality of subframe types comprise at least a first type in which transmissions in a first cell are protected by restricting transmissions in a second cell; and
means for signaling the resource allocation to a user equipment (UE).
24. The apparatus of claim 23 , wherein:
the wireless communications network comprises a heterogeneous network; and
the first and second cells are of different power class types.
25. The apparatus of claim 23 , wherein:
the plurality of subframe types comprise at least second and third types; and
a common set of PUCCH resources are allocated to subframes of the second and third types.
26. The apparatus of claim 23 , wherein the means for signaling the resource allocation to the UE comprises means for signaling an indication of a starting point for a dynamic region for transmitting acknowledgements.
27. The apparatus of claim 26 , wherein:
the indication is set to a maximum value;
the resources allocated for the PUCCH in a subframe of the first type utilize a first region defined by the maximum value; and
the resources allocated for the PUCCH in a subframe of a second type utilize a second region that comprises a subset of resources of the first region.
28. The apparatus of claim 27 , wherein resources of a third region are allocated for a physical uplink shared channel (PUSCH) in the subframe of the second type, wherein the third region comprises a subset of resources of the first region and is non-overlapping with the second region.
29. The apparatus of claim 26 , wherein:
the indication is set to a minimum value; and
the resources allocated for the PUCCH in a subframe of the first type comprise resources in a first region defined by the minimum value and a second region that is outside the first region and outside the dynamic region for transmitting acknowledgements.
30. The apparatus of claim 23 , wherein:
the UE is of a first type; and
resources allocated for PUCCH resources of the UE in subframes of at least the first type are shared with resources allocated for a dynamic region for transmitting acknowledgements by a UE of a second type.
31. The apparatus of claim 30 , wherein resources allocated for PUCCH resources of the UE in subframes of at least the second type are not shared with resources allocated for a dynamic region for transmitting acknowledgements by the UE of the first or second type.
32. The apparatus of claim 30 , further comprising:
means for scheduling a starting control channel element (CCE) of a physical downlink control channel (PDCCH) for the UE of the second type such that a dynamic acknowledgement resource derived based on the starting CCE does not collide with resources shared with PUCCH resources allocated to the UE of the first type.
33. The apparatus of claim 30 , further comprising:
means for signaling a minimum PUCCH region allocated for subframes of at least the first and a second subframe type; and
means for signaling an additional PUCCH region allocated for subframes of at least the first subframe type.
34. An apparatus for determining allocated uplink resources in a wireless communications network, comprising:
means for determining at least one of a location or a size of a region for an allocation of physical uplink control channel (PUCCH) resources of a subframe based on a subframe type of a plurality of subframe types, wherein the plurality of subframe types comprise at least a first type in which transmissions in a first cell are protected by restricting transmissions in a second cell; and
means for transmitting, in the subframe, information to a base station of the first cell using the allocated PUCCH resources for that subframe type.
35. The apparatus of claim 34 , wherein:
the wireless communications network comprises a heterogeneous network; and
the first and second cells are of different power class types.
36. The apparatus of claim 34 , wherein:
the plurality of subframe types comprise at least second and third types; and
a common set of PUCCH resources are allocated to subframes of the second and third types.
37. The apparatus of claim 34 , further comprising means for receiving, from a base station of the first cell, an indication of a starting point for a dynamic region for transmitting acknowledgements.
38. The apparatus of claim 37 , wherein:
the indication is set to a maximum value;
the resources allocated for the PUCCH in a subframe of the first type utilize a first region defined by the maximum value; and
the resources allocated for the PUCCH in a subframe of a second type utilize a second region that comprises a subset of resources of the first region.
39. The apparatus of claim 38 , wherein resources of a third region are allocated for a physical uplink shared channel (PUSCH) in the subframe of the second type, wherein the third region comprises a subset of resources of the first region and is non-overlapping with the second region.
40. The apparatus of claim 37 , wherein:
the indication is set to a minimum value; and
the resources allocated for the PUCCH in a subframe of the first type comprise resources in a first region defined by the minimum value and a second region that is outside the first region and outside the dynamic region for transmitting acknowledgements.
41. The apparatus of claim 34 , wherein:
the apparatus comprises a user equipment (UE) and the UE is of a first type; and
resources allocated for PUCCH resources of the UE in subframes of at least the first type are shared with resources allocated for a dynamic region for transmitting acknowledgements by a UE of a second type.
42. The apparatus of claim 41 , wherein resources allocated for PUCCH resources of the UE in subframes of at least the second type are not shared with resources allocated for a dynamic region for transmitting acknowledgements by the UE of the first or second type.
43. The apparatus of claim 41 , further comprising:
means for receiving a physical downlink control channel (PDCCH) for the UE of the second type; and
means for deriving a dynamic acknowledgement resource based on a starting CCE of the PDCCH, wherein the starting CCE is scheduled such that the derived dynamic acknowledgement resource does not collide with resources shared with PUCCH resources allocated to the UE of the first type.
44. The apparatus of claim 41 , wherein the means for determining comprises:
means for receiving, from the base station of the first cell, an indication of a minimum PUCCH region allocated for subframes of at least the first and a second subframe type and an indication of an additional PUCCH region allocated for subframes of at least the first subframe type.
45. An apparatus for allocating uplink resources in a wireless communications network, comprising:
at least one processor configured to:
determine at least one of a location or a size of a region for an allocation of physical uplink control channel (PUCCH) resources of a subframe based on a subframe type of a plurality of subframe types, wherein the plurality of subframe types comprise at least a first type in which transmissions in a first cell are protected by restricting transmissions in a second cell, and
signal the resource allocation to a user equipment (UE); and
a memory coupled to the at least one processor.
46. An apparatus for allocating uplink resources in a wireless communications network, comprising:
at least one processor configured to:
determine at least one of a location or a size of a region for an allocation of physical uplink control channel (PUCCH) resources of a subframe based on a subframe type of a plurality of subframe types, wherein the plurality of subframe types comprise at least a first type in which transmissions in a first cell are protected by restricting transmissions in a second cell, and
transmit, in the subframe, information to a base station of the first cell using the allocated PUCCH resources for that subframe type; and
a memory coupled to the at least one processor.
47. A computer program product comprising a non-transitory computer-readable medium having instructions stored thereon for allocating uplink resources in a wireless communications network, the instructions executable by one or more processors for:
determining at least one of a location or a size of a region for an allocation of physical uplink control channel (PUCCH) resources of a subframe based on a subframe type of a plurality of subframe types, wherein the plurality of subframe types comprise at least a first type in which transmissions in a first cell are protected by restricting transmissions in a second cell; and
signaling the resource allocation to a user equipment (UE).
48. A computer program product comprising a non-transitory computer-readable medium having instructions stored thereon for determining allocated uplink resources in a wireless communications network, the instructions executable by one or more processors for:
determining at least one of a location or a size of a region for an allocation of physical uplink control channel (PUCCH) resources of a subframe based on a subframe type of a plurality of subframe types, wherein the plurality of subframe types comprise at least a first type in which transmissions in a first cell are protected by restricting transmissions in a second cell; and
transmitting, in the subframe, information to a base station of the first cell using the allocated PUCCH resources for that subframe type.