# US 12,184,369 B2 · Adaptive phase-changing device power-saving operations > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,184,369 B2 - Document ID: US12184369B2 - Status: Granted - Kind: B2 - Application number: 18/259,768 - Filed: 2021-11-30 - Published: 2024-02-22 - Granted: 2024-12-31 - Earliest claimed: 2021-01-05 - Assignees: Google Inc. - Applicants: Google LLC - Inventors: Jibing Wang; Erik Richard Stauffer - Web page: https://patentgrep.com/patent/US12184369B2 ## CPC - H04B 7/0617: {for beam forming} - H04B 7/026: Co-operative diversity, e.g. using fixed or mobile stations as relays - H04B 7/04013: {Intelligent reflective surfaces} - H04B 7/0456: Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting - H04W 52/0235: {where the received signal is a power saving command} - H04W 76/28: Discontinuous transmission [DTX]; Discontinuous reception [DRX] - H04B 7/145: Passive relay systems - H04B 7/15528: {Control of operation parameters of a relay station to exploit the physical medium} - H04W 52/0216: {using a pre-established activity schedule, e.g. traffic indication frame} - H04W 52/0229: {where the received signal is a wanted signal} - Y02D 30/70: in wireless communication networks - H04B: TRANSMISSION - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE ## Abstract Techniques and apparatuses are described for adaptive phase-changing device power-saving operations. In aspects, a base station determines to transition an adaptive phase-changing device (APD) into an enabled APD-PS mode and determines an APD-PS configuration for the APD that specifies a framework for operating in the enabled APD-PS mode. The base station then directs the APD to operate in the enabled APD-PS mode by communicating the APD-PS configuration to the APD and transmits or receives wireless signals using a surface of the APD and based on the APD-PS configuration. ## Claims ### Claim 1 A method performed by a base station for using an adaptive phase-changing device (APD) in a wireless network based on an APD power saving configuration (APD-PS configuration of the APD), the method comprising: selecting an APD-PS configuration for the APD that specifies a framework for operating in an enabled APD-PS mode; directing the APD to operate in the enabled APD-PS mode by communicating the APD-PS configuration to the APD; and transmitting or receiving wireless signals using a surface of the APD and based on the APD-PS configuration. ### Claim 2 (depends on 1) The method as recited in claim 1, wherein selecting the APD-PS configuration further comprises selecting, as the framework for operating in the enabled APD-PS mode, at least one of: an APD-PS cycle configuration; one or more APD-PS state-transitions; or an APD-surface-configuration sequence. ### Claim 3 (depends on 2) The method as recited in claim 2, wherein the APD-surface-configuration sequence includes multiple surface-configurations, the method further comprising: directing the APD to apply the multiple surface-configurations in succession to the surface while the APD operates in an APD-PS awake-state. ### Claim 4 (depends on 1) The method as recited in claim 1, wherein selecting the APD-PS configuration further comprises: configuring a long APD-PS cycle that spans a first time-duration with multiple short APD-PS cycles, each short APD-PS cycle associated with a respective user equipment (UE) of multiple user equipments (UEs) and spanning a respective time-duration that is shorter than the first time-duration. ### Claim 5 (depends on 4) The method as recited in claim 4, wherein configuring the long APD-PS cycle with the multiple short APD-PS cycles further comprises: aligning, in the APD-PS configuration, the respective short APD-PS cycle to a respective discontinuous reception (DRX) cycle of the respective UE. ### Claim 6 (depends on 1) The method as recited in claim 1, wherein transmitting or receiving the wireless signals further comprises: transmitting or receiving the wireless signals towards the surface of the APD while the APD operates in an APD-PS sleep-state. ### Claim 7 (depends on 1) The method as recited in claim 1, further comprising: transmitting a wakeup signal to the APD that directs the APD to immediately transition to an APD-PS awake-state; or transmitting a sleep signal to the APD that directs the APD to immediately transition to an APD-PS sleep-state. ### Claim 8 (depends on 1) The method as recited in claim 1, wherein selecting the APD-PS configuration for the APD further comprises at least one of: selecting the APD-PS configuration for the APD based on synchronization signal block (SSB) transmissions of the base station; selecting the APD-PS configuration for the APD based on a physical random access channel (PRACH) transmission opportunity; or selecting the APD-PS configuration for the APD based on an integrated access backhaul (IAB) transmission opportunity. ### Claim 9 (depends on 1) The method as recited in claim 1, further comprising: detecting a low-utilization trigger event, wherein the selecting the APD-PS configuration for the APD that specifies the framework for operating in the enabled APD-PS mode is based on the detecting the low-utilization trigger event. ### Claim 10 (depends on 9) The method as recited in claim 9, wherein the low-utilization trigger event comprises at least one of: identifying that a number of transmissions in the wireless network falls below a threshold value; identifying that one or more user equipments (UEs) connected to the base station currently operate in a DRX mode; or identifying, from historical records, that the wireless network statistically operates in a low-utilization mode during a current time-period. ### Claim 11 (depends on 1) The method as recited in claim 1, further comprising: communicating with a user equipment (UE) using the surface of the APD before the selecting of the APD-PS configuration for the APD that specifies the framework for operating in the enabled APD-PS mode. ### Claim 12 A base station comprising: a processor; and computer-readable storage media comprising instructions, executable by the processor, to configure the base station to: select an APD-PS configuration for the APD that specifies a framework for operating in an enabled APD-PS mode; direct the APD to operate in the enabled APD-PS mode by communicating the APD-PS configuration to the APD; and transmit or receive wireless signals using a surface of the APD and based on the APD-PS configuration. ### Claim 13 (depends on 12) The base station of claim 12, wherein the instructions for the selection of the APD-PS configuration are further executable to configure the base station to select, as the framework for operating in the enabled APD-PS mode, at least one of: an APD-PS cycle configuration; one or more APD-PS state-transitions; or an APD-surface-configuration sequence. ### Claim 14 (depends on 13) The base station of claim 13, wherein the APD-surface-configuration sequence includes multiple surface-configurations, the instructions further executable to configure the base station to: direct the APD to apply the multiple surface-configurations in succession to the surface while the APD operates in an APD-PS awake-state. ### Claim 15 (depends on 12) The base station of claim 12, wherein the instructions for the selection of the APD-PS configuration are further executable to configure the base station to: configure a long APD-PS cycle that spans a first time-duration with multiple short APD-PS cycles, each short APD-PS cycle associated with a respective user equipment (UE) of multiple user equipments (UEs) and spanning a respective time-duration that is shorter than the first time-duration, wherein the instructions for the configuration of the long APD-PS cycle with the multiple short APD-PS cycles are further executable to configure the base station to: align, in the APD-PS configuration, the respective short APD-PS cycle to a respective discontinuous reception (DRX) cycle of the respective UE. ### Claim 16 (depends on 12) The base station of claim 12, wherein the instructions for the transmission or reception of the wireless signals are further executable to configure the base station to: transmit or receive the wireless signals towards the surface of the APD while the APD operates in an APD-PS sleep-state. ### Claim 17 (depends on 12) The base station of claim 12, wherein the instructions are further executable to configure the base station to: transmit a wakeup signal to the APD that directs the APD to immediately transition to an APD-PS awake-state; or transmit a sleep signal to the APD that directs the APD to immediately transition to an APD-PS sleep-state. ### Claim 18 (depends on 12) The base station of claim 12, wherein the instructions for the selection of the APD-PS configuration are further executable to configure the base station to: select the APD-PS configuration for the APD based on synchronization signal block (SSB) transmissions of the base station; select the APD-PS configuration for the APD based on a physical random access channel (PRACH) transmission opportunity; or select the APD-PS configuration for the APD based on an integrated access backhaul (IAB) transmission opportunity. ### Claim 19 (depends on 12) The base station of claim 12, wherein the instructions are further executable to configure the base station to: detect a low-utilization trigger event, wherein the selection of the APD-PS configuration for the APD that specifies the framework for operating in the enabled APD-PS mode is based on the detection of the low-utilization trigger event. ### Claim 20 (depends on 12) The base station of claim 12, wherein the instructions are further executable to configure the base station to: communicate with a user equipment (UE) using the surface of the APD before the selection of the APD-PS configuration for the APD that specifies the framework for operating in the enabled APD-PS mode.