Techniques and apparatuses for nesting a new radio system and a long term evolution system
Certain aspects of the present disclosure generally relate to wireless communication. In some aspects, a UE may measure a first reference signal, associated with a frequency band of a long term evolution (LTE) system, and a second reference signal associated with a frequency band of a new radio (NR) system. The frequency band of the NR system may overlap the frequency band of the LTE system. The UE may determine first channel state feedback, associated with the frequency band of the LTE system, and second channel state feedback, associated with the frequency band of the NR system, based at least in part on the first reference signal and the second reference signal, respectively. The UE may report the first channel state feedback or the second channel state feedback in uplink control information (UCI). Other aspects are provided.
1. A method for wireless communication performed by a user equipment (UE), comprising:
operating in a new radio (NR) frequency band; and
communicating with a base station using the NR frequency band,
wherein multiple long term evolution (LTE) frequency bands are overlapped by the NR frequency band in a subframe,
wherein resources in the NR frequency band are concurrently used by a NR system and a LTE system,
wherein a NR transmission is communicated, and
wherein the NR transmission is multiplexed with a LTE transmission in the subframe.
2. The method of claim 1 , wherein multiple sub-bands of the NR frequency band overlap the multiple LTE frequency bands.
3. The method of claim 1 , further comprising:
communicating the LTE transmission with the base station using an LTE frequency band of the multiple LTE frequency bands.
4. The method of claim 1 ,
wherein the NR transmission is time division multiplexed with the LTE transmission in a mini-slot within the subframe.
5. The method of claim 1 ,
wherein the NR transmission is a downlink transmission.
6. The method of claim 1 , wherein the resources comprise the subframe.
7. A method for wireless communication performed by a base station, comprising:
operating in a new radio (NR) frequency band; and
communicating with a user equipment using the NR frequency band,
wherein multiple long term evolution (LTE) frequency bands are overlapped by the NR frequency band in a subframe,
wherein resources in the NR frequency band are concurrently used by a NR system and a LTE system,
wherein a NR transmission is communicated, and
wherein the NR transmission is multiplexed with a LTE transmission in the subframe.
8. The method of claim 7 , wherein multiple sub-bands of the NR frequency band overlap the multiple LTE frequency bands.
9. The method of claim 7 , further comprising:
communicating the LTE transmission with at least one user equipment using an LTE frequency band of the multiple LTE frequency bands.
10. The method of claim 7 ,
wherein the NR transmission is time division multiplexed with the LTE transmission in a mini-slot within the subframe.
11. The method of claim 7 ,
wherein the NR transmission is a downlink transmission.
12. A user equipment (UE) for wireless communication, comprising:
a memory; and
one or more processors coupled to the memory, the one or more processors configured to:
operate in a new radio (NR) frequency band; and
communicate with a base station using the NR frequency band,
wherein multiple long term evolution (LTE) frequency bands are overlapped by the NR frequency band in a subframe,
wherein resources in the NR frequency band are concurrently used by a NR system and a LTE system,
wherein a NR transmission is communicated, and
wherein the NR transmission is multiplexed with a LTE transmission in the subframe.
13. The UE of claim 12 , wherein multiple sub-bands of the NR frequency band overlap the multiple LTE frequency bands.
14. The UE of claim 12 ,
wherein the NR transmission is a downlink transmission.
15. The UE of claim 12 , wherein the NR frequency band is a frequency band with a subcarrier spacing of 60 kilohertz (kHz).
16. The UE of claim 12 , wherein the one or more processors are further configured to:
receive configuration information associated with an LTE frequency band, of the multiple LTE frequency bands, and the NR frequency band.
17. The UE of claim 16 , wherein the configuration information is received from the base station.
18. The UE of claim 16 , wherein the configuration information includes information indicating that the UE is to use synchronization information for synchronization associated with the NR frequency band.
19. The UE of claim 18 , wherein the synchronization information is associated with the LTE frequency band.
20. The UE of claim 16 , wherein the configuration information includes information that signals resources that carry a reference signal associated with the NR frequency band.
21. The UE of claim 12 , wherein an LTE frequency band, of the multiple LTE frequency bands, is a frequency band with a subcarrier spacing of 15 kilohertz (kHz).
22. The UE of claim 12 , wherein the resources comprise the subframe.
23. The UE of claim 12 , wherein the one or more processors are further configured to:
receive configuration information, associated with the NR frequency band, in a sub-band of the NR frequency band that does not overlap an LTE frequency band of the multiple LTE frequency bands.
24. The UE of claim 12 , wherein the one or more processors are further configured to:
receive configuration information, associated with the NR frequency band, in a different NR frequency band.
25. The UE of claim 12 , wherein the one or more processors are further configured to:
receive a reference signal, associated with the NR frequency band, based at least in part on synchronization information associated with an LTE frequency band of the multiple LTE frequency bands.
26. A base station for wireless communication, comprising:
a memory; and
one or more processors coupled to the memory, the one or more processors configured to:
operate in a new radio (NR) frequency band; and
communicate with a user equipment using the NR frequency band,
wherein multiple long term evolution (LTE) frequency bands are overlapped by the NR frequency band in a subframe,
wherein resources in the NR frequency band are concurrently used by a NR system and a LTE system,
wherein a NR transmission is communicated, and
wherein the NR transmission is multiplexed with a LTE transmission in the subframe.
27. The base station of claim 26 , wherein multiple sub-bands of the NR frequency band overlap the multiple LTE frequency bands.
28. The base station of claim 26 ,
wherein the NR transmission is a downlink transmission.
29. The base station of claim 26 , wherein the NR frequency band is a frequency band with a subcarrier spacing of 60 kilohertz (kHz).
30. The base station of claim 26 , wherein the NR transmission is time division multiplexed with the LTE transmission in a mini-slot within the subframe.