Carrier aggregation capability signaling
Methods, systems, and devices for wireless communication are described. Techniques to use capability information for user equipment in wide band systems such as millimeter wave systems. The capability information can include information indicative of support for limited non-contiguous intra-band carrier aggregation. The capability information can include information indicative of support for sharing time and frequency tracking information between cells.
1. A method of wireless communication performed by a user equipment (UE), the method comprising:
generating information indicative of support for limited non-contiguous intra-band carrier aggregation, wherein the support for the limited non-contiguous intra-band carrier aggregation is support for a limited frequency range W less than a frequency range L of a particular frequency band;
communicating the information indicative of the support for the limited non-contiguous intra-band carrier aggregation to one or more network entities; and
receiving information indicative of an allocation of resources for downlink communications based at least in part on the information indicative of the support for the limited non-contiguous intra-band carrier aggregation.
2. The method of claim 1 , wherein the information indicative of the support for the limited non-contiguous intra-band carrier aggregation comprises an indication of a magnitude of the limited frequency range W.
3. The method of claim 2 , wherein the indication of the limited frequency range W is based on a frequency separation indication of a frequency separation between a lower frequency of a supported lowest component carrier and an upper frequency of a supported highest component carrier in the particular frequency band.
4. The method of claim 1 , wherein the information indicative of the support for the limited non-contiguous intra-band carrier aggregation comprises an indication of a number of receive processing chains included in transceiver circuitry of the UE.
5. The method of claim 4 , wherein the indication of the number of receive processing chains included in the transceiver circuitry of the UE indicates that the number of receive processing chains included in the transceiver circuitry of the UE is less than a number to provide support for full intra-band carrier aggregation, wherein the support for the full intra-band carrier aggregation is support for the frequency range L of the particular frequency band.
6. The method of claim 1 , wherein communicating the information indicative of the support for the limited non-contiguous intra-band carrier aggregation comprises transmitting the information in a Radio Resource Control (RRC) message to a first cell associated with a first base station.
7. The method of claim 6 , further comprising, subsequently communicating with the first cell using a first component carrier and communicating with a second cell using a second different component carrier, wherein the first component carrier and the second different component carrier span a frequency range less than or equal to the limited frequency range W.
8. The method of claim 1 , wherein communicating the information indicative of the support for the limited non-contiguous intra-band carrier aggregation comprises transmitting the information in a control message to a first cell associated with a first base station, wherein the first base station is associated with a service provider with at least a first spectrum allotment and a second spectrum allotment separated by a frequency gap G that is, greater than W, and wherein the method further comprises:
receiving a first indication of one or more assigned component carriers from the first cell, wherein the one or more assigned component carriers are all included in the first spectrum allotment;
communicating with at least the first cell using the one or more assigned component carriers included in the first spectrum allotment;
communicating with a different cell associated with a different base station after a handoff procedure; and
receiving a second indication of one or more additional assigned component carriers from the different cell, wherein the one or more additional assigned component carriers are all included in the second spectrum allotment.
9. The method of claim 1 , wherein communicating the information indicative of the support for the limited non-contiguous intra-band carrier aggregation comprises transmitting the information in a control message to a first cell associated with a first base station, wherein the first base station is associated with a service provider with at least a first spectrum allotment and a second spectrum allotment separated by a frequency gap G, wherein a minimum component carrier frequency width is S, and wherein W is equal to or greater than G+2S but less than a frequency range R spanned by the first spectrum allotment and the second spectrum allotment, and further comprising:
receiving an indication of one or more assigned component carriers associated with at least the first cell and a second cell, wherein the one or more assigned component carriers include at least one assigned component carrier from the first spectrum allotment and at least one additional assigned component carrier from the second spectrum allotment.
10. The method of claim 9 , wherein the first spectrum allotment or the second spectrum allotment or both are associated with a smallest component carrier size greater than the minimum component carrier frequency width S, and wherein W is greater than a sum of the smallest component carrier size associated with the first spectrum allotment, the smallest component carrier size associated with the second spectrum allotment, and the frequency gap G between the first spectrum allotment and the second spectrum allotment.
11. The method of claim 1 , wherein the information indicative of the support for limited intra-band carrier aggregation includes an indication of a pre-defined maximum range of the limited frequency range W.
12. An apparatus for wireless communication at a user equipment (UE), the apparatus comprising:
memory circuitry; and
processor circuitry configured to access the memory circuitry and configured to cause the UE to:
generate information indicative of support for limited non-contiguous intra-band carrier aggregation, wherein the support for the limited non-contiguous intra-band carrier aggregation is support for a limited frequency range W less than a frequency range L of a particular frequency band;
communicate the information indicative of the support for the limited non-contiguous intra-band carrier aggregation to one or more network entities; and
receive information indicative of an allocation of resources for downlink communications based at least in part on the information indicative of the support for the limited non-contiguous intra-band carrier aggregation.
13. The apparatus of claim 12 , wherein the information indicative of the support for the limited non-contiguous intra-band carrier aggregation comprises an indication of a magnitude of the limited frequency range W.
14. The apparatus of claim 13 , wherein the indication of the limited frequency range W is based on a frequency separation indication of a frequency separation between a lower frequency of a supported lowest component carrier and an upper frequency of a supported highest component carrier in the particular frequency band.
15. The apparatus of claim 12 , wherein the information indicative of the support for the limited non-contiguous intra-band carrier aggregation comprises an indication of a number of receive processing chains included in transceiver circuitry of the UE, wherein the indication of the number of receive processing chains included in the transceiver circuitry of the UE indicates that the number of receive processing chains included in the transceiver circuitry of the UE is less than a number to provide support for full intra-band carrier aggregation, wherein the support for the full intra-band carrier aggregation is support for the frequency range L of the particular frequency band.
16. The apparatus of claim 12 , wherein to communicate the information indicative of the support for the limited non-contiguous intra-band carrier aggregation, the processor circuitry is configured to cause the UE to transmit the information in a Radio Resource Control (RRC) message to a first cell associated with a first base station, wherein the processor circuitry is further configured to cause the UE to, subsequently communicate with the first cell using a first component carrier and communicate with a second cell using a second different component carrier, wherein the first component carrier and the second different component carrier span a frequency range less than or equal to the limited frequency range W.
17. The apparatus of claim 12 , wherein communication of the information indicative of the support for the limited non-contiguous intra-band carrier aggregation comprises transmission of the information in a control message to a first cell associated with a first base station, wherein the first base station is associated with a service provider with at least a first spectrum allotment and a second spectrum allotment separated by a frequency gap G that is greater than W, and wherein the processor circuitry is further configured to cause the UE to:
receive a first indication of one or more assigned component carriers from the first cell, wherein the one or more assigned component carriers are all included in the first spectrum allotment;
communicate with at least the first cell using the one or more assigned component carriers included in the first spectrum allotment;
communicate with a different cell associated with a different base station after a handoff procedure; and
receive a second indication of one or more additional assigned component carriers from the different cell, wherein the one or more additional assigned component carriers are all included in the second spectrum allotment.
18. The apparatus of claim 12 , wherein communication of the information indicative of the support for the limited non-contiguous intra-band carrier aggregation comprises transmission of the information in a control message to a first cell associated with a first base station, wherein the first base station is associated with a service provider with at least a first spectrum allotment and a second spectrum allotment separated by a frequency gap G, wherein a minimum component carrier frequency width is S, and wherein W is equal to or greater than G+2S but less than a frequency range R spanned by the first spectrum allotment and the second spectrum allotment, and wherein the processor circuitry is further configured to cause the UE to:
receive an indication of one or more assigned component carriers associated with at least the first cell and a second cell, wherein the one or more assigned component carriers include at least one assigned component carrier from the first spectrum allotment and at least one additional assigned component carrier from the second spectrum allotment, wherein the first spectrum allotment or the second spectrum allotment or both are associated with a smallest component carrier size greater than the minimum component carrier frequency width S, and wherein W is greater than a sum of the smallest component carrier size associated with the first spectrum allotment, the smallest component carrier size associated with the second spectrum allotment, and the gap G between the first spectrum allotment and the second spectrum allotment.
19. The apparatus of claim 12 , wherein the information indicative of the support for limited intra-band carrier aggregation includes an indication of a pre-defined maximum range of the limited frequency range W.
20. A non-transitory computer-readable medium storing computer executable code at a user equipment (UE), the code when executed by at least one processor causes the UE to:
generate information indicative of support for limited non-contiguous intra-band carrier aggregation, wherein the support for the limited non-contiguous intra-band carrier aggregation is support for a limited frequency range W less than a frequency range L of a particular frequency band;
communicate the information indicative of the support for the limited non-contiguous intra-band carrier aggregation to one or more network entities; and
receive information indicative of an allocation of resources for downlink communications based at least in part on the information indicative of the support for the limited non-contiguous intra-band carrier aggregation.
21. The non-transitory computer-readable medium of claim 20 , wherein the information indicative of the support for limited intra-band carrier aggregation includes an indication of a pre-defined maximum range of the limited frequency range W.