# US 12,604,220 B2 · OTA estimation of an RF parameter of a radio transmitter > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,604,220 B2 - Document ID: US12604220B2 - Status: Granted - Kind: B2 - Application number: 18/002,408 - Filed: 2020-06-23 - Published: 2023-07-20 - Granted: 2026-04-14 - Earliest claimed: 2020-06-23 - Assignees: Telefonaktiebolaget LM Ericsson (publ) - Applicants: Telefonaktiebolaget LM Ericsson (publ) - Inventors: Torbjörn Elfström; Jonas Fridén; Aidin Razavi; Sam Agneessens - Web page: https://patentgrep.com/patent/US12604220B2 ## CPC - H04W 24/08: Testing, {supervising or monitoring} using real traffic - H04B 7/06952: {Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping} - H04B 17/102: {Power radiated at antenna} - H04B 17/18: Monitoring during normal operation - H04L 5/0005: {Time-frequency} - H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)} - H04W 72/12: Wireless traffic scheduling - H04L 5/0023: {Time-frequency-space} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract There is provided mechanisms for enabling OTA estimation of a radio frequency parameter of a radio transmitter during a test time interval. The radio transmitter is configured for transmission in a set of beams. A method is performed by a controller of the radio transmitter. The method comprises identifying a subset of beams in the set of beams that, during the test time interval, are unused for transmission of scheduled signals. The method comprises instructing the radio transmitter to transmit, during the test time interval, an unscheduled signal in the subset of beams, whilst also transmitting the scheduled signals in those beams of the set of beams that are used for transmission of the scheduled signals, for enabling estimation of the radio frequency parameter of the radio transmitter. ## Claims ### Claim 1 A method for enabling over-the-air, OTA, estimation of a radio frequency parameter of a radio transmitter during a test time interval, wherein the radio transmitter is configured for transmission in a set of beams, the method being performed by a controller of the radio transmitter, the method comprising: identifying a subset of beams in the set of beams that, during the test time interval, are unused for transmission of scheduled signals; and instructing the radio transmitter to transmit, during the test time interval, an unscheduled signal in the subset of beams, whilst also transmitting the scheduled signals in those beams of the set of beams that are used for transmission of the scheduled signals, for enabling estimation of the radio frequency parameter of the radio transmitter. ### Claim 2 (depends on 1) The method according to claim 1, wherein the unscheduled signal is constituted by a time/frequency component and a spatial component. ### Claim 3 (depends on 2) The method according to claim 2, wherein the time/frequency component is defined by a block of time/frequency resources in a time/frequency grid. ### Claim 4 (depends on 3) The method according to claim 3, wherein the block of time/frequency resources are unused for transmission of the scheduled signals during the test time interval. ### Claim 5 (depends on 2) The method according to claim 2, wherein the spatial component is defined by the subset of beams in which the unscheduled signal is transmitted. ### Claim 6 (depends on 1) The method according to claim 1, wherein the unscheduled signal, during the test time interval, is also transmitted in the beams in which the scheduled signals are transmitted. ### Claim 7 (depends on 6) The method according to claim 6, wherein the scheduled signals are transmitted in time/frequency resources of a time/frequency grid, and wherein the unscheduled signal is transmitted in any unused time/frequency resources in the time/frequency grid. ### Claim 8 (depends on 1) The method according to claim 1, wherein the set of beams is defined by a fixed grid of beams. ### Claim 9 (depends on 1) The method according to claim 1, wherein the beams in the set of beams have pointing directions that are uniformly distributed within the coverage region. ### Claim 10 (depends on 1) The method according to claim 1, wherein beams in the subset of beams are only bounded by being within the coverage region and having pointing directions that do not overlap with pointing directions of beams in which scheduled signals are transmitted within the test time interval. ### Claim 11 (depends on 1) The method according to claim 1, wherein the subset of beams in which the unscheduled signal is transmitted comprises either one single beam or at least two beams, wherein each of the at least two narrow beams has a more narrow beam width than the one single beam. ### Claim 12 (depends on 1) The method according to claim 1, wherein the subset of beams is identified as those beams of the set of beams in which no scheduled reference signals are transmitted. ### Claim 13 (depends on 1) The method according to claim 1, wherein the unscheduled signal is either a reference signal or a dedicated test signal. ### Claim 14 (depends on 13) The method according to claim 13, wherein the dedicated test signal is composed of either a predetermined sequence of symbols or a randomly selected sequence of symbols. ### Claim 15 (depends on 1) The method according to claim 1, wherein whether or not to transmit the unscheduled signal in the subset of beams during the test time interval is selectively enabled and disabled. ### Claim 16 (depends on 15) The method according to claim 15, wherein whether to enable or disable transmission of the unscheduled signal is dependent on a network control signal as received by the controller or a network-external control signal as received by the controller. ### Claim 17 (depends on 1) The method according to claim 1, wherein the radio frequency parameter pertains to total radiated power as used by the radio transmitter for transmission during the time test interval. ### Claim 18 (depends on 1) The method according to claim 1, wherein the radio transmitter is part of a radio access network node. ### Claim 19 A controller of a radio transmitter for enabling over-the-air, OTA, estimation of a radio frequency parameter of the radio transmitter during a test time interval, wherein the radio transmitter is configured for transmission in a set of beams, the controller comprising processing circuitry, the processing circuitry being configured to cause the controller to: identify a subset of beams in the set of beams that, during the test time interval, are unused for transmission of scheduled signals; and instruct the radio transmitter to transmit, during the test time interval, an unscheduled signal in the subset of beams, whilst also transmitting the scheduled signals in those beams of the set of beams that are used for transmission of the scheduled signals, for enabling estimation of the radio frequency parameter of the radio transmitter. ### Claim 20 A non-transitory computer readable medium comprising a computer program for enabling over-the-air, OTA, estimation of a radio frequency parameter of a radio transmitter during a test time interval, wherein the radio transmitter is configured for transmission in a set of beams, the computer program comprising computer code which, when run on processing circuitry of a controller of the radio transmitter, causes the controller to: identify a subset of beams in the set of beams that, during the test time interval, are unused for transmission of scheduled signals; and instruct the radio transmitter to transmit, during the test time interval, an unscheduled signal in the subset of beams, whilst also transmitting the scheduled signals in those beams of the set of beams that are used for transmission of the scheduled signals, for enabling estimation of the radio frequency parameter of the radio transmitter.