# US 12,603,680 B2 · Switching between polarization and spatial multiple-input-multiple-output based on a multiband antenna > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,603,680 B2 - Document ID: US12603680B2 - Status: Granted - Kind: B2 - Application number: 18/315,977 - Filed: 2023-05-11 - Published: 2024-11-14 - Granted: 2026-04-14 - Earliest claimed: 2023-05-11 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Vasanthan Raghavan; Mohammad Ali Tassoudji; Junyi Li - Web page: https://patentgrep.com/patent/US12603680B2 ## CPC - H04B 7/0456: Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting - H04B 7/0404: the mobile station comprising multiple antennas, e.g. to provide uplink diversity - H04B 7/0469: {taking special antenna structures, e.g. cross polarized antennas into account} - H04B 7/0608: {Antenna selection according to transmission parameters} - H04B 7/0628: {Diversity capabilities} - H04B 7/0691: {using subgroups of transmit antennas} - H04B 7/0697: {using spatial multiplexing} - H04B 7/10: Polarisation diversity; Directional diversity - H04B: TRANSMISSION ## Abstract Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit a first indication of a multiple-input-multiple-output (MIMO) configuration threshold that is associated with a selection between a polarization MIMO configuration and a spatial MIMO configuration, the MIMO configuration threshold being based at least in part on a performance threshold. The UE may receive a second indication of a MIMO communication configuration that specifies the selection. Numerous other aspects are described. ## Claims ### Claim 1 An apparatus for wireless communication at a user equipment (UE), comprising: a memory; and one or more processors, coupled to the memory, the one or more processors individually or collectively configured to: transmit a first indication of a multiple-input-multiple-output (MIMO) configuration threshold that is associated with a selection between a polarization MIMO configuration and a spatial MIMO configuration, the MIMO configuration threshold being based at least in part on a performance threshold; receive a second indication of a MIMO communication configuration that specifies the selection; obtain an updated MIMO configuration threshold based at least in part on a set of reference signals; and transmit a third indication of the updated MIMO configuration threshold. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the one or more processors are further configured, individually or collectively, to: transmit a third indication of the performance threshold. ### Claim 3 (depends on 2) The apparatus of claim 2, wherein the performance threshold includes at least one of: a spectral efficiency performance threshold, or a data rate performance threshold. ### Claim 4 (depends on 2) The apparatus of claim 2, wherein the performance threshold includes at least one of: a polarization MIMO performance threshold, or a spatial MIMO performance threshold. ### Claim 5 (depends on 1) The apparatus of claim 1, wherein the MIMO configuration threshold includes a frequency-dependent angular spread threshold that indicates a polarization MIMO performance based at least in part on a carrier frequency and an angular spread of a dominant cluster in a communication channel. ### Claim 6 (depends on 1) The apparatus of claim 1, wherein the MIMO configuration threshold includes a frequency-dependent angular spread threshold that indicates a spatial MIMO performance based at least in part on a carrier frequency and an angular spread of a dominant cluster in a communication channel. ### Claim 7 (depends on 1) The apparatus of claim 1, wherein the one or more processors, to transmit the first indication of the MIMO configuration threshold, are configured, individually or collectively, to: transmit the first indication of the MIMO configuration threshold in UE capability information. ### Claim 8 (depends on 1) The apparatus of claim 1, wherein the apparatus is a first apparatus, and the one or more processors are further configured, individually or collectively, to: communicate with a second apparatus based at least in part on the MIMO communication configuration. ### Claim 9 An apparatus for wireless communication at a network node, comprising: a memory; and one or more processors, coupled to the memory, the one or more processors individually or collectively configured to: receive a first indication of a multiple-input-multiple-output (MIMO) configuration threshold that is associated with a selection between a polarized MIMO configuration and a spatial MIMO configuration, the MIMO configuration threshold being based at least in part on a performance threshold; transmit a second indication of a MIMO communication configuration that specifies the selection; receive a third indication of an updated MIMO configuration threshold; and select an updated MIMO communication configuration based at least in part on the updated MIMO configuration threshold. ### Claim 10 (depends on 9) The apparatus of claim 9, wherein the one or more processors are further configured, individually or collectively, to: perform the selection between the polarized MIMO configuration and the spatial MIMO configuration based at least in part on the MIMO configuration threshold. ### Claim 11 (depends on 10) The apparatus of claim 10, wherein the one or more processors, to perform the selection, are configured, individually or collectively, to: perform the selection based at least in part on at least one of: a carrier frequency, or an angular spread. ### Claim 12 (depends on 9) The apparatus of claim 9, wherein the one or more processors are further configured, individually or collectively, to: receive a third indication of the performance threshold. ### Claim 13 (depends on 12) The apparatus of claim 12, wherein the performance threshold includes at least one of: a spectral efficiency performance threshold, or a data rate performance threshold. ### Claim 14 (depends on 12) The apparatus of claim 12, wherein the performance threshold includes at least one of: a polarized MIMO performance threshold, or a spatial MIMO performance threshold. ### Claim 15 (depends on 9) The apparatus of claim 9, wherein the MIMO configuration threshold includes a frequency-dependent angular spread threshold that indicates a polarized MIMO performance based at least in part on a carrier frequency and an angular spread. ### Claim 16 (depends on 9) The apparatus of claim 9, wherein the MIMO configuration threshold includes a frequency-dependent angular spread threshold that indicates a spatial MIMO performance based at least in part on a carrier frequency and an angular spread. ### Claim 17 (depends on 9) The apparatus of claim 9, wherein the one or more processors, to receive the first indication of the MIMO configuration threshold, are configured, individually or collectively, to: receive the first indication of the MIMO configuration threshold in user equipment (UE) capability information. ### Claim 18 (depends on 9) The apparatus of claim 9, wherein the one or more processors are further configured, individually or collectively, to: communicate with a user equipment (UE) based at least in part on the MIMO communication configuration. ### Claim 19 A method of wireless communication performed by a user equipment (UE), comprising: transmitting a first indication of a multiple-input-multiple-output (MIMO) configuration threshold that is associated with a selection between a polarization MIMO configuration and a spatial MIMO configuration, the MIMO configuration threshold being based at least in part on a performance threshold; receiving a second indication of a MIMO communication configuration that specifies the selection; obtaining an updated MIMO configuration threshold based at least in part on a set of reference signals; and transmitting a third indication of the updated MIMO configuration threshold. ### Claim 20 (depends on 19) The method of claim 19, further comprising: transmitting a third indication of the performance threshold. ### Claim 21 (depends on 19) The method of claim 19, wherein the MIMO configuration threshold includes a frequency-dependent angular spread threshold that indicates a polarization MIMO performance based at least in part on a carrier frequency and an angular spread of a dominant cluster in a communication channel. ### Claim 22 (depends on 19) The method of claim 19, wherein the MIMO configuration threshold includes a frequency-dependent angular spread threshold that indicates a spatial MIMO performance based at least in part on a carrier frequency and an angular spread of a dominant cluster a communication channel. ### Claim 23 A method of wireless communication performed by a network node, comprising: receiving a first indication of a multiple-input-multiple-output (MIMO) configuration threshold that is associated with a selection between a polarized MIMO configuration and a spatial MIMO configuration, the MIMO configuration threshold being based at least in part on a performance threshold; transmitting a second indication of a MIMO communication configuration that specifies the selection; receiving a third indication of an updated MIMO configuration threshold; and selecting an updated MIMO communication configuration based at least in part on the updated MIMO configuration threshold. ### Claim 24 (depends on 23) The method of claim 23, further comprising: performing the selection between the polarized MIMO configuration and the spatial MIMO configuration based at least in part on the MIMO configuration threshold. ### Claim 25 (depends on 24) The method of claim 24, wherein performing the selection comprises: performing the selection based at least in part on at least one of: a carrier frequency, or an angular spread. ### Claim 26 (depends on 23) The method of claim 23, further comprising: receiving a third indication of the performance threshold. ### Claim 27 (depends on 23) The method of claim 23, wherein the MIMO configuration threshold includes at least one of: a first frequency-dependent angular spread threshold that indicates a polarized MIMO performance based at least in part on a carrier frequency and an angular spread, or a second frequency-dependent angular spread threshold that indicates a spatial MIMO performance based at least in part on the carrier frequency and the angular spread. ### Claim 28 (depends on 23) The method of claim 23, wherein the MIMO configuration threshold includes a frequency-dependent angular spread threshold that indicates a polarized MIMO performance based at least in part on a carrier frequency and an angular spread. ### Claim 29 (depends on 23) The method of claim 23, wherein the MIMO configuration threshold includes a frequency-dependent angular spread threshold that indicates a spatial MIMO performance based at least in part on a carrier frequency and an angular spread. ### Claim 30 (depends on 23) The method of claim 23, further comprising: receiving the first indication of the MIMO configuration threshold in user equipment (UE) capability information.