US-12627358-B2 - Subband-based reporting for concurrent beam pair links

Abstract

Methods, systems, and devices for wireless communication are described to support concurrent beam pair link (BPL) measurement and reporting on a subband basis. A base station may configure a user equipment (UE) to measure one or more wideband reference signals transmitted by the base station for each of a set of BPLs, for joint BPL selection, and the UE may receive the wideband reference signals. The UE may perform measurements for each of the set BPLs at a subband level and may report signal qualities for the different BPL combinations at a subband level. For example, the UE may measure different combinations of transmit beams and receive beams (e.g., may measure different BPLs) over multiple antenna panels, on a per-subband basis. The UE may report information based on the measurements that may support selection of BPLs for multi-panel and multi-beam operation for one or more subbands.

Inventors

• Mohammed Ali Mohammed Hirzallah
• Arumugam Chendamarai Kannan
• Srinivas Yerramalli
• Xiaoxia Zhang

Assignees

• QUALCOMM INCORPORATED

Dates

Publication Date

20260512

Application Date

20220613

Priority Date

20210615

Claims (20)

1. 1 . A method for wireless communication at a user equipment (UE), comprising: receiving, from a base station, a plurality of wideband reference signals each spanning a frequency range that comprises a plurality of subbands, wherein each of the plurality of wideband reference signals is received concurrently with at least one other of the plurality of wideband reference signals; measuring, for a subband within the frequency range, signal quality for a set of beam pair links based at least in part on two or more of the plurality of wideband reference signals as concurrently received, wherein the measured signal quality is specific to the subband, and wherein each beam pair link of the set of beam pair links comprises a transmit beam for the base station and a receive beam for the UE; and transmitting, to the base station and based at least in part on the measured signal quality for the set of beam pair links, an indication of signal quality that is specific to the subband and indicates a group of two or more beam pair links of the set of beam pair links.
2. 2 . The method of claim 1 , further comprising: receiving an indication to report signal quality on a per-subband basis for the set of beam pair links, wherein transmitting the indication of signal quality that is specific to the subband is based at least in part on receiving the indication to report signal quality on the per-subband basis.
3. 3 . The method of claim 2 , wherein receiving the indication to report signal quality on the per-subband basis comprises: receiving an indication of a quantity of beam pair links to indicate via the indication of signal quality that is specific to the subband, wherein each of the beam pair links indicated by the indication of signal quality has higher signal quality than each of the other beam pair links of the set of beam pair links.
4. 4 . The method of claim 2 , wherein receiving the indication to report signal quality on the per-subband basis comprises: receiving an indication of a periodicity associated with transmitting the indication of signal quality, a periodicity associated with measuring signal quality for the set of beam pair links, or both.
5. 5 . The method of claim 1 , further comprising: receiving an indication of one or more subbands within the frequency range for reporting signal quality, wherein measuring the signal quantity and transmitting the indication of signal quality that is specific to the subband are based at least in part on the subband being included in the indicated one or more subbands.
6. 6 . The method of claim 1 , further comprising: determining one or more subbands within the first frequency range for reporting signal quality, wherein measuring the signal quantity and transmitting the indication of signal quality that is specific to the subband are based at least in part on the subband being included in the determined one or more subbands.
7. 7 . The method of claim 1 , further comprising: measuring, for a second subband within the frequency range, a second signal quality for the set of beam pair links based at least in part on two or more of the plurality of wideband reference signals as concurrently received, wherein the second signal quality is specific to the second subband; and transmitting, to the base station and based at least in part on the measuring of the second signal quality for the set of beam pair links, a second indication of signal quality that is specific to the second subband and indicates a second group of two or more beam pair links of the set of beam pair links.
8. 8 . The method of claim 1 , wherein transmitting the indication of signal quality comprises: transmitting an indication of a set of candidate subbands within the frequency range for communications with the base station, the set of candidate subbands comprising the subband; and transmitting, for each subband of the set of candidate subbands, an indication of a respective group of two or more candidate beam pair links for communications with the base station via the subband.
9. 9 . The method of claim 1 , wherein transmitting the indication of signal quality comprises: transmitting an indication of a set of candidate beam pair links for communications with the base station, the set of candidate beam pair links comprising the group of two or more beam pair links; and transmitting, for each candidate beam pair link of the set of candidate beam pair links, an indication of a respective set of one or more candidate subbands for communications with the base station via the candidate beam pair link.
10. 10 . The method of claim 1 , wherein transmitting the indication of signal quality comprises: transmitting a respective indication of one or more signal quality measurements for each of a plurality of beam pair links, wherein each indication of one or more signal quality measurements is associated with a respective combination of a beam pair link within the set of beam pair links and a respective subband within the frequency range, and wherein the indication of signal quality comprises a first signal quality measurement and one or more other signal quality measurements each indicating a respective difference relative to the first signal quality measurement.
11. 11 . The method of claim 1 , further comprising: receiving, based at least in part on transmitting the indication of signal quality, an indication of one or more pairs of beam pair links within the set of beam pair links to use for communications with the base station, the indication of the one or more pairs of beam pair links comprising one or more quasi co-location properties for each of the pairs of beam pair links; and communicating with the base station via the one or more pairs of beam pair links.
12. 12 . The method of claim 1 , further comprising: receiving an indication of a repetition of the plurality of wideband reference signals; and measuring, for a second subband within the frequency range at a second time based at least in part on the repetition, a second signal quality for the set of beam pair links based at least in part on two or more of the plurality of wideband reference signals as concurrently received, wherein the measuring of the signal quality that is specific to the subband occurs at a first time.
13. 13 . The method of claim 1 , further comprising: receiving an indication of a repetition of the plurality of wideband reference signals; measuring, at a second time based at least in part on the repetition, a second signal quality for a second set of beam pair links that is specific to the subband and based at least in part on two or more of the plurality of wideband reference signals as concurrently received, wherein the measuring of the signal quality that is specific to the set of beam pair links occurs at a first time.
14. 14 . A method for wireless communication at a base station, comprising: transmitting, to a user equipment (UE), a plurality of wideband reference signals each spanning a frequency range that comprises a plurality of subbands, wherein each of the plurality of wideband reference signals is transmitted concurrently with at least one other of the plurality of wideband reference signals; and receiving, from the UE and based at least in part on two or more of the plurality of wideband reference signals as concurrently transmitted, an indication of signal quality that is specific to a subband within the frequency range and indicates a group of two or more beam pair links of a set of beam pair links, wherein each beam pair link of the set of beam pair links comprises a transmit beam for the base station and a receive beam for the UE.
15. 15 . The method of claim 14 , further comprising: transmitting, to the UE, an indication to report signal quality on a per-subband basis for the set of beam pair links, wherein: receiving the indication of signal quality that is specific to the subband is based at least in part on transmitting the indication to report signal quality on the per-subband basis; and transmitting the indication to report signal quality on the per-subband basis comprises transmitting an indication of a quantity of beam pair links for the UE to indicate via the indication of signal quality that is specific to the subband, wherein each of the beam pair links indicated by the indication of signal quality has higher signal quality than each of the other beam pair links of the set of beam pair links.
16. 16 . The method of claim 14 , further comprising: transmitting, to the UE, an indication to report signal quality on a per-subband basis for the set of beam pair links, wherein: receiving the indication of signal quality that is specific to the subband is based at least in part on transmitting the indication to report signal quality on the per-subband basis; and transmitting the indication to report signal quality on the per-subband basis comprises transmitting an indication of a periodicity associated with the UE transmitting the indication of signal quality, a periodicity associated with the UE measuring signal quality for the set of beam pair links, or both.
17. 17 . The method of claim 14 , further comprising: transmitting an indication of one or more subbands within the frequency range for signal quality reporting by the UE, wherein receiving the indication of signal quality that is specific to the subband is based at least in part on the subband being included in the indicated one or more subbands; or transmitting an indication of an allocation of one or more subbands of the frequency range for communications between the UE and the base station, wherein receiving the indication of signal quality that is specific to the subband is based at least in part on the subband being included in the allocated one or more subbands.
18. 18 . The method of claim 14 , further comprising: receiving, from the UE and based at least in part on two or more of the plurality of wideband reference signals as concurrently transmitted, a second indication of signal quality that is specific to a second subband within the frequency range and indicates a second group of two or more beam pair links of the set of beam pair links.
19. 19 . The method of claim 14 , wherein receiving the indication of signal quality comprises: receiving an indication of a set of candidate subbands within the frequency range for communications with the UE, the set of candidate subbands comprising the subband; and receiving, for each subband of the set of candidate subbands, an indication of a respective group of two or more candidate beam pair links for communications with the UE via the subband.
20. 20 . The method of claim 14 , wherein receiving the indication of signal quality comprises: receiving an indication of a set of candidate beam pair links for communications with the UE, the set of candidate beam pair links comprising the group of two or more beam pair links; and receiving, for each candidate beam pair link of the set of candidate beam pair links, an indication of a respective set of one or more candidate subbands for communications with the UE via the candidate beam pair link.

Description

CROSS REFERENCES The present Application is a 371 national stage filing of International PCT Application No. PCT/US2022/072903 by Hirzallah et al. entitled “SUBBAND-BASED REPORTING FOR CONCURRENT BEAM PAIR LINKS,” filed Jun. 13, 2022; and claims priority to Indian Patent Application No. 202141026583 by Hirzallah et al. entitled “SUBBAND-BASED REPORTING FOR CONCURRENT BEAM PAIR LINKS,” filed Jun. 15, 2021, each of which is assigned to the assignee hereof, and each of which is expressly incorporated by reference in its entirety herein. BACKGROUND 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). Examples of such multiple-access systems include fourth generation (4G) systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems which may be referred to as New Radio (NR) systems. These systems may employ technologies such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal FDMA (OFDMA), or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multiple-access communications system may include one or more base stations or one or more network access nodes, each simultaneously supporting communication for multiple communication devices, which may be otherwise known as user equipment (UE). A UE and a base station may communicate using one or more beams, or beam pair links (BPLs), where each BPL may include a receive beam and a transmit beam. SUMMARY The described techniques relate to improved methods, systems, devices, and apparatuses that support subband-based reporting for concurrent beam pair links (BPLs). Generally, the described techniques provide for concurrent BPL measurement and reporting to be performed on a subband basis. For example, a user equipment (UE) may determine (e.g., based on one or more measurements) and report information to a base station that may support selection of two or more BPLs per subband, such as BPLs having a highest signal quality for that subband. The base station may configure the UE to measure one or more wideband reference signals transmitted by the base station for each of a set of BPLs, for joint BPL selection, and the UE may receive the wideband reference signals. The UE may perform measurements for each of the set BPLs at a subband level and may report signal qualities for the different BPL combinations at a subband level. For example, the UE may measure different combinations of transmit beams and receive beams (e.g., may measure different BPLs) over multiple antenna panels, on a subband basis. The UE may report information based on the measurements that may support selection of BPLs for multi-panel and multi-beam operation for one or more subbands. A method for wireless communication at a UE is described. The method may include receiving, from a base station, a set of multiple wideband reference signals each spanning a frequency range that includes a set of multiple subbands, where each of the set of multiple wideband reference signals is received concurrently with at least one other of the set of multiple wideband reference signals, measuring, for a subband within the frequency range, signal quality for a set of BPLs based on two or more of the set of multiple wideband reference signals as concurrently received, wherein the measured signal quality is specific to the subband, and wherein each BPL of the set of BPLs includes a transmit beam for the base station and a receive beam for the UE, and transmitting, to the base station and based on the measured signal quality that is specific to the set of BPLs, an indication of signal quality for the subband and indicates a group of two or more BPLs of the set of BPLs. An apparatus for wireless communication at a UE is described. The apparatus may include a processor, memory coupled with the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to receive, from a base station, a set of multiple wideband reference signals each spanning a frequency range that includes a set of multiple subbands, where each of the set of multiple wideband reference signals is received concurrently with at least one other of the set of multiple wideband reference signals, measuring, for a subband within the frequency range, signal quality for a set of BPLs based on two or more of the set of multiple wideband reference signals as concurrently received, wherein the measured signal quality is specific to the subband, and wherein each BPL of the set of BPLs includes a transmit beam for the base station and a receiv