US-12627353-B2 - Air to ground signaling enhancement for cross-waveform interference measurement and reporting

Abstract

A method includes: communicating with a base station using a first waveform; receiving configuration information specifying an interference measurement resource associated with a second waveform different from a channel measurement resource associated with the first waveform; performing channel measurement associated with the first waveform and interference measurement associated with the second waveform, according to the configuration information; and providing channel state information (CSI) feedback to the base station, the CSI feedback based at least in part on the channel measurement and the interference measurement.

Inventors

• Qiaoyu Li
• Chao Wei
• Yu Zhang
• Hao Xu

Assignees

• QUALCOMM INCORPORATED

Dates

Publication Date

20260512

Application Date

20210415

Claims (20)

1. 1 . A method performed by a user equipment (UE), the method comprising: communicating with a base station using a first waveform; receiving configuration information specifying a channel measurement resource associated with the first waveform and an interference measurement resource associated with a second waveform different from the first waveform; performing channel measurement associated with the first waveform according to the channel measurement resource and interference measurement associated with the second waveform; according to the interference measurement resource; and transmitting channel state information (CSI) feedback to the base station, the CSI feedback being based at least in part on the channel measurement and the interference measurement.
2. 2 . The method of claim 1 , wherein the configuration information comprises a resource setting in a channel state information (CSI)-ReportConfig signal.
3. 3 . The method of claim 1 , wherein the interference measurement resource associated with the second waveform comprises a channel state information reference signal (CSI-RS).
4. 4 . The method of claim 1 , wherein the interference measurement resource associated with the second waveform comprises a channel state information interference measurement (CSI-IM).
5. 5 . The method of claim 1 , wherein the first waveform comprises orthogonal frequency division duplexing (OFDM), and wherein the second waveform comprises orthogonal time frequency space (OTFS).
6. 6 . The method of claim 1 , wherein the channel measurement resource associated with the first waveform comprises a nonzero power channel state information reference signal (NZP-CSI-RS).
7. 7 . The method of claim 1 , wherein the CSI feedback comprises a channel quality indicator (CQI) based at least in part on the interference measurement associated with the second waveform.
8. 8 . The method of claim 1 , wherein the configuration information provides information about the second waveform.
9. 9 . The method of claim 1 , wherein the configuration information indicates a component carrier or bandwidth part associated with the second waveform.
10. 10 . The method of claim 1 , wherein the configuration information identifies a time domain offset associated with a starting slot of the interference measurement resource, wherein the time domain offset is identified by an item selected from a list consisting of: a number of symbols of a monitored bandwidth part and time units.
11. 11 . The method of claim 1 , wherein the configuration information identifies time domain drifting rate information, wherein the time domain drifting rate is further identified by at least one update identifying additional offset subsequent to a number of slots or symbols, and further wherein the time domain drifting rate is identified by an item selected from a list consisting of: a number of symbols of a monitored bandwidth part, and time units.
12. 12 . The method of claim 11 , wherein the update is received from an item selected from a list consisting of: a downlink control indicator (DCI); a media access control-control element (MAC-CE); and a radio resource control (RRC) signal.
13. 13 . The method of claim 1 , wherein the configuration information identifies time domain drifting information of the interference measurement resource, further wherein the time domain drifting information is specific to the interference measurement resource or is specific to a set to which the interference measurement resource belongs.
14. 14 . The method of claim 1 , where the configuration information identifies time domain drifting information of the interference measurement resource, further wherein the time domain drifting information is provided by an item selected from a list consisting of: a channel state information (CSI)-ReportConfig signal having a time domain drifting information element with a time domain drifting information index; and a CSI-ReportConfig signal identifying the interference measurement resource with a time domain drifting information index.
15. 15 . The method of claim 1 , further comprising: transmitting an uplink signal including an indication of a capability of the UE for monitoring a different waveform, wherein the capability of the UE comprises a number of different waveforms that can be monitored for channel measurement resources or interference measurement resources with respect to a given waveform associated with a physical downlink shared channel (PDSCH) of the UE; and wherein the configuration information indicates the second waveform to be monitored, the second waveform being selected based at least in part on the capability of the UE.
16. 16 . The method of claim 1 , wherein the UE comprises an air to ground (ATG) UE.
17. 17 . A user equipment (UE) comprising: at least one transceiver; memory comprising instructions; and a processor configured to execute the instructions to cause the UE to: process configuration information from a base station (BS) specifying a channel measurement resource associated with a first waveform and an interference measurement resource associated with a second waveform different from the first waveform; perform, via the at least one transceiver, channel measurement associated with the first waveform according to the channel measurement resource and interference measurement associated with the second waveform according to the interference measurement resource; and transmit, via the at least one transceiver, channel state information (CSI) feedback to the base station, the CSI feedback being based at least in part on the channel measurement and the interference measurement.
18. 18 . The UE of claim 17 , wherein the UE comprises a terrestrial UE.
19. 19 . The UE of claim 17 , wherein the UE comprises an air to ground (ATG) UE.
20. 20 . The UE of claim 17 , wherein the configuration information comprises a resource setting in a channel state information (CSI)-ReportConfig signal.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS The present application is a 35 U.S.C. 371 National Phase entry of Patent Cooperation Treaty (PCT) Application No. PCT/CN2021/087417, filed Apr. 15, 2021, which is hereby incorporated by reference in its entirety as if fully set forth below and for all applicable purposes. TECHNICAL FIELD This application relates to wireless communication systems, and more particularly to techniques to mitigate air to ground (ATG) interference in user equipment (UE) by measuring and reporting interference from other waveforms. INTRODUCTION Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power). A wireless multiple-access communications system may include a number of base stations (BSs), each simultaneously supporting communications for multiple communication devices, which may be otherwise known as user equipment (UE). To meet the growing demands for expanded mobile broadband connectivity, wireless communication technologies are advancing from the long term evolution (LTE) technology to a next generation new radio (NR) technology, which may be referred to as 5th Generation (5G). For example, NR is designed to provide a lower latency, a higher bandwidth or a higher throughput, and a higher reliability than LTE. NR is designed to operate over a wide array of spectrum bands, for example, from low-frequency bands below about 1 gigahertz (GHz) and mid-frequency bands from about 1 GHz to about 6 GHz, to high-frequency bands such as mmWave bands. NR is also designed to operate across different spectrum types, from licensed spectrum to unlicensed and shared spectrum. Spectrum sharing enables operators to opportunistically aggregate spectrums to dynamically support high-bandwidth services. Spectrum sharing can extend the benefit of NR technologies to operating entities that may not have access to a licensed spectrum. NR technology may also make use of a variety of different base station and user equipment technologies to maintain communication at acceptable throughput rates. An example type of base station and user equipment technology includes air to ground (ATG) applications. An example of an ATG application includes a base station having antennas oriented generally upward communicating with an aircraft-based UE. ATG base stations may have large radio frequency (RF) footprints, e.g., a radius of hundreds of kilometers. By contrast, a typical terrestrial base station may have a footprint of only a few kilometers. Therefore, an ATG base station may include within its footprint multiple terrestrial base stations communicating with a multitude of terrestrial UEs. Accordingly, there is a need in the art to address channel state measurement and interference measurement by terrestrial UEs receiving signals from ATG user equipment. BRIEF SUMMARY OF SOME EXAMPLES The following summarizes some aspects of the present disclosure to provide a basic understanding of the discussed technology. This summary is not an extensive overview of all contemplated features of the disclosure and is intended neither to identify key or critical elements of all aspects of the disclosure nor to delineate the scope of any or all aspects of the disclosure. Its sole purpose is to present some concepts of one or more aspects of the disclosure in summary form as a prelude to the more detailed description that is presented later. For example, in an aspect of the disclosure, a method includes communicating with a base station using a first waveform; receiving configuration information specifying an interference measurement resource associated with a second waveform different from a channel measurement resource associated with the first waveform; performing channel measurement associated with the first waveform and interference measurement associated with the second waveform, according to the configuration information; and providing channel state information (CSI) feedback to the base station, the CSI feedback based at least in part on the channel measurement and the interference measurement. In another aspect, a UE includes: a transceiver; and a processor configured to control the transceiver, the processor further configured to: process configuration information from a base station (BS) specifying a channel measurement resource associated with a first waveform and an interference measurement resource associated with a second waveform different from the first waveform, the first waveform corresponding to a downlink configuration of the UE; perform channel measurement associated with the first waveform and interference measurement associated with the second waveform, according to the configuration information; and provide channel state information (CSI) feedback to