# US 12,119,912 B2 · Configuration of active groups of antenna ports > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,119,912 B2 - Document ID: US12119912B2 - Status: Granted - Kind: B2 - Application number: 17/727,506 - Filed: 2022-04-22 - Published: 2023-10-26 - Granted: 2024-10-15 - Earliest claimed: 2022-04-22 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Yi Huang; Yu Zhang; Runxin Wang; Hyojin Lee - Web page: https://patentgrep.com/patent/US12119912B2 ## CPC - H04B 7/0691: {using subgroups of transmit antennas} - H04B 7/06956: {using a selection of antenna panels} - H04B 7/0608: {Antenna selection according to transmission parameters} - H04B 7/0634: {Antenna weights or vector/matrix coefficients} - H04B 7/0639: {Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection} - H04B: TRANSMISSION ## Abstract Aspects relate to configuring active groups of antenna ports. An apparatus may support different groups of antenna ports. One or more of these groups may be designated as active (e.g., for a scheduled transmission). In some examples, a first apparatus may send to a second apparatus an indication of the active groups. The second apparatus may then use the active groups for a transmission. ## Claims ### Claim 1 An apparatus for communication, comprising: an interface; and a processing system configured to: obtain, via the interface, a first indication of at least one active group of a plurality of groups of antenna ports; obtain, via the interface, at least one transmit precoding matrix indicator for the at least one active group, wherein the at least one transmit precoding matrix indicator comprises a single transmit precoding matrix indicator for a first active group of the at least one active group, a second active group of the at least one active group, and a third active group of the at least one active group; and output, via the interface for transmission, signals associated with at least one antenna port of the at least one active group. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the processing system is further configured to: obtain, via the interface, at least one second indication of at least one precoder for the at least one active group. ### Claim 3 (depends on 1) The apparatus of claim 1, wherein the at least one transmit precoding matrix indicator comprises a first transmit precoding matrix indicator for a first active group of the at least one active group and a second transmit precoding matrix indicator for a second active group of the at least one active group. ### Claim 4 (depends on 3) The apparatus of claim 3, wherein the first transmit precoding matrix indicator is different from the second transmit precoding matrix indicator. ### Claim 5 (depends on 1) The apparatus of claim 1, wherein the at least one transmit precoding matrix indicator comprises a single transmit precoding matrix indicator for a first active group of the at least one active group and a second active group of the at least one active group. ### Claim 6 (depends on 1) The apparatus of claim 1, wherein the at least one transmit precoding matrix indicator comprises a first transmit precoding matrix indicator for a first active group of the at least one active group, a second transmit precoding matrix indicator for a second active group of the at least one active group, and a third transmit precoding matrix indicator for a third active group of the at least one active group. ### Claim 7 (depends on 6) The apparatus of claim 6, wherein the first transmit precoding matrix indicator is different from the third transmit precoding matrix indicator. ### Claim 8 (depends on 1) The apparatus of claim 1, wherein the processing system is further configured to: output, via the interface for transmission, a second indication of particular groups of the plurality of groups of antenna ports that are supported by the apparatus. ### Claim 9 (depends on 8) The apparatus of claim 8, wherein the processing system is further configured to: output, via the interface for transmission, a third indication of at least one respective antenna port in each of the particular groups supported by the apparatus. ### Claim 10 (depends on 1) The apparatus of claim 1, wherein: first antenna ports of a first group of the plurality of groups of antenna ports are mutually coherent; second antenna ports of a second group of the plurality of groups of antenna ports are mutually coherent; and the first antenna ports are not coherent with respect to the second antenna ports. ### Claim 11 (depends on 10) The apparatus of claim 10, wherein: third antenna ports of a third group of the plurality of groups of antenna ports are mutually coherent; and the third antenna ports are not coherent with respect to the first antenna ports and the second antenna ports. ### Claim 12 (depends on 1) The apparatus of claim 1, wherein the plurality of groups of antenna ports comprises two groups of antenna ports, three groups of antenna ports, or four groups of antenna ports. ### Claim 13 (depends on 1) The apparatus of claim 1, wherein the plurality of groups of antenna ports comprises eight antenna ports. ### Claim 14 (depends on 1) The apparatus of claim 1, wherein: a first group of the plurality of groups of antenna ports is associated with a first antenna port and a second antenna port; a second group of the plurality of groups of antenna ports is associated with a third antenna port and a fourth antenna port; a third group of the plurality of groups of antenna ports is associated with a fifth antenna port and a sixth antenna port; and a fourth group of the plurality of groups of antenna ports is associated with a seventh antenna port and an eighth antenna port. ### Claim 15 (depends on 1) The apparatus of claim 1, wherein: a first group of the plurality of groups of antenna ports is associated with a first antenna port and a second antenna port; a second group of the plurality of groups of antenna ports is associated with a third antenna port and a fourth antenna port; and a third group of the plurality of groups of antenna ports is associated with a fifth antenna port, a sixth antenna port, a seventh antenna port, and an eighth antenna port. ### Claim 16 (depends on 1) The apparatus of claim 1, wherein: a first group of the plurality of groups of antenna ports is associated with a first antenna port and a second antenna port; and a second group of the plurality of groups of antenna ports is associated with a third antenna port, a fourth antenna port, a fifth antenna port, a sixth antenna port, a seventh antenna port, and an eighth antenna port. ### Claim 17 (depends on 1) The apparatus of claim 1, wherein: a first group of the plurality of groups of antenna ports is associated with a first antenna port, a second antenna port, a third antenna port and a fourth antenna port; and a second group of the plurality of groups of antenna ports is associated with a fifth antenna port, a sixth antenna port, a seventh antenna port, and an eighth antenna port. ### Claim 18 (depends on 1) The apparatus of claim 1, further comprising: a receiver configured to receive the first indication of at least one active group; and a transmitter configured to transmit the signals via the at least one antenna port, wherein the apparatus is configured as a user equipment or a network entity. ### Claim 19 A method for communication at an apparatus, the method comprising: obtaining a first indication of at least one active group of a plurality of groups of antenna ports; obtaining at least one transmit precoding matrix indicator for the at least one active group, wherein the at least one transmit precoding matrix indicator comprises a single transmit precoding matrix indicator for a first active group of the at least one active group, a second active group of the at least one active group, and a third active group of the at least one active group; and outputting, for transmission, signals associated with at least one antenna port of the at least one active group. ### Claim 20 A first apparatus for communication, comprising: an interface; and a processing system configured to: output, via the interface for transmission to a second apparatus, a first indication of at least one active group of a plurality of groups of antenna ports; obtain, via the interface, signals from the second apparatus that are associated with at least one antenna port of the at least one active group; obtain, via the interface, a second indication of particular groups of the plurality of groups of antenna ports that are supported by the second apparatus; and obtain, via the interface, a third indication of at least one respective antenna port in each particular group supported by the second apparatus. ### Claim 21 (depends on 20) The first apparatus of claim 20, wherein the processing system is further configured to: output, via the interface for transmission, at least one transmit precoding matrix indicator for the at least one active group. ### Claim 22 (depends on 20) The first apparatus of claim 20, wherein the processing system is further configured to: select the at least one active group based on the second indication. ### Claim 23 (depends on 20) The first apparatus of claim 20, wherein the processing system is further configured to: select the at least one active group based on the third indication. ### Claim 24 (depends on 20) The first apparatus of claim 20, wherein the plurality of groups of antenna ports comprises eight antenna ports. ### Claim 25 (depends on 20) The first apparatus of claim 20, further comprising: a transmitter configured to transmit the first indication of at least one active group; and a receiver configured to receive the signals from the second apparatus, wherein the first apparatus is configured as a network entity.