# US 12,193,047 B2 · Techniques for protecting radio frequency front-end components > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,193,047 B2 - Document ID: US12193047B2 - Status: Granted - Kind: B2 - Application number: 17/657,025 - Filed: 2022-03-29 - Published: 2022-10-06 - Granted: 2025-01-07 - Earliest claimed: 2021-03-30 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Thawatt Gopal; Qingxin Chen; Cheol Hee Park; Reza Shahidi - Web page: https://patentgrep.com/patent/US12193047B2 ## CPC - H04W 72/569: {of the traffic information} - H04B 1/44: Transmit/receive switching - H04W 76/15: Setup of multiple wireless link connections - H04W 88/06: adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION ## Abstract The present disclosure relates to methods, devices and software that can be used for preventing damage to RF front end equipment used in wireless communication systems. In some aspects, a user equipment (UE) may establish a first communication having a first priority, wherein the first communication is associated with a first subscriber in a connected mode. The UE may establish a second communication having a second priority, wherein the second communication is associated with a second subscriber in the connected mode. The UE may identify a state of a transmit/receive (TRX) switch shared between the first communication and the second communication. The UE may perform, based at least in part on the state of the TRX switch, at least one of the first communication or the second communication using a TRX switching configuration. ## Claims ### Claim 1 A user equipment (UE) for wireless communication, comprising: a memory; and one or more processors, coupled to the memory, configured to: establish a first communication associated with a first priority, wherein the first communication is associated with a first subscriber in a connected mode, the first communication is ongoing; establish a second communication associated with a second priority, wherein the second communication is associated with a second subscriber in the connected mode, the first priority is higher than the second priority; identify one or more components shared between the first communication and the second communication, wherein the one or more components are included in a radio frequency front-end (RFFE) of the UE, are switchable between the first subscriber and the second subscriber, and include at least one of: a transmit/receive (TRX) switch, a low noise amplifier (LNA), or a cross-switch; and perform at least one of the first communication or the second communication using a configuration to prevent damage to the one or more components of the UE based at least in part on the one or more components being shared between the first communication and the second communication, wherein perform at least one of the first communication or the second communication using the configuration to prevent damage to the one or more components comprises: prevent the TRX switch from switching to a state associated with the second communication. ### Claim 2 (depends on 1) The UE of claim 1, wherein the second communication is ongoing, and wherein, to perform at least one of the first communication or the second communication using the configuration to prevent damage to the one or more components, the one or more processors are configured to: blank the second communication; switch the TRX switch to a state associated with the first communication; and perform the first communication. ### Claim 3 (depends on 1) The UE of claim 1, wherein, to perform at least one of the first communication or the second communication using the configuration to prevent damage to the one or more components, the one or more processors are configured to: blank or postponing the second communication in a slot, wherein the first communication is scheduled for the slot; and perform the first communication in the slot. ### Claim 4 (depends on 3) The UE of claim 3, wherein the one or more processors, to blank the second communication, are configured to trigger a power amplifier or a digital-analog converter of the second communication to blank the second communication. ### Claim 5 (depends on 1) The UE of claim 1, wherein, to identify the one or more components, the one or more processors are configured to: identify that the TRX switch is shared between the first communication and the second communication based at least in part on the first communication and the second communication being associated with a same power amplifier. ### Claim 6 (depends on 1) The UE of claim 1, wherein the TRX switch is associated with switching a front-end antenna path of the UE between the first subscriber and the second subscriber. ### Claim 7 (depends on 1) The UE of claim 1, wherein the first communication is a transmission, and wherein, to perform at least one of the first communication or the second communication using the configuration to prevent damage to the one or more components, the one or more processors are configured to: perform at least one of the first communication or the second communication with an input of the LNA terminated at a threshold resistance load. ### Claim 8 (depends on 1) The UE of claim 1, wherein the first communication is a transmission, and wherein, to perform at least one of the first communication or the second communication using the configuration to prevent damage to the one or more components, the one or more processors are configured to: perform at least one of the first communication or the second communication using a high impedance mode at the LNA. ### Claim 9 (depends on 1) The UE of claim 1, wherein the first communication is a transmission, and wherein, to perform at least one of the first communication or the second communication using the configuration to prevent damage to the one or more components, the one or more processors are configured to: perform at least one of the first communication or the second communication with the LNA terminated to ground. ### Claim 10 (depends on 1) The UE of claim 1, wherein the one or more processors are further configured to: identify a switch request of the cross-switch, wherein performing at least one of the first communication or the second communication using the configuration to prevent damage to the one or more components is based at least in part on which subscriber, of the first subscriber and the second subscriber, triggered the switch request. ### Claim 11 (depends on 10) The UE of claim 10, wherein the switch request is triggered by the first subscriber, and wherein, to perform at least one of the first communication or the second communication using the configuration to prevent damage to the one or more components, the one or more processors are configured to: perform an antenna switch reconfiguration of the cross-switch in accordance with the switch request; and blank the second communication. ### Claim 12 (depends on 10) The UE of claim 10, wherein the switch request is associated with an antenna-switched diversity configuration or a sounding reference signal antenna switching configuration. ### Claim 13 (depends on 10) The UE of claim 10, wherein the switch request is triggered by the second subscriber, and wherein, to perform at least one of the first communication or the second communication using the configuration to prevent damage to the one or more components, the one or more processors are configured to: postpone an antenna switch reconfiguration of the cross-switch until the first communication is completed; and perform the antenna switch reconfiguration after the first communication is completed. ### Claim 14 (depends on 10) The UE of claim 10, wherein the switch request is triggered by the second subscriber, and wherein, to perform at least one of the first communication or the second communication using the configuration to prevent damage to the one or more components, the one or more processors are configured to: cancel an antenna switch reconfiguration of the cross-switch based at least in part on the antenna switch reconfiguration impacting the first communication. ### Claim 15 (depends on 10) The UE of claim 10, wherein the switch request is triggered by the second subscriber, and wherein, to perform at least one of the first communication or the second communication using the configuration to prevent damage to the one or more components, the one or more processors are configured to: perform a switch of the cross-switch based at least in part on a determination that the switch can be performed without impacting the first communication. ### Claim 16 (depends on 1) The UE of claim 1, wherein the one or more processors, to identify the one or more components, are configured to identify a state of the one or more components. ### Claim 17 A method of wireless communication performed by a user equipment (UE), comprising: establishing a first communication associated with a first priority, wherein the first communication is associated with a first subscriber in a connected mode, the first communication is ongoing; establishing a second communication associated with a second priority, wherein the second communication is associated with a second subscriber in the connected mode, the first priority is higher than the second priority; identifying one or more components shared between the first communication and the second communication, wherein the one or more components are included in a radio frequency front-end (RFFE) of the UE, are switchable between the first subscriber and the second subscriber, and include at least one of: a transmit/receive (TRX) switch, a low noise amplifier (LNA), or a cross-switch; and performing at least one of the first communication or the second communication using a configuration to prevent damage to the one or more components of the UE based at least in part on the one or more components being shared between the first communication and the second communication, wherein performing of at least one of the first communication or the second communication using the configuration to prevent damage to the one or more components comprises: preventing the TRX switch from switching to a state associated with the second communication. ### Claim 18 (depends on 17) The method of claim 17, wherein the second communication is ongoing, and wherein the performance of at least one of the first communication or the second communication using the configuration to prevent damage to the one or more components further comprises: blanking the second communication; switching the TRX switch to a state associated with the first communication; and performing the first communication. ### Claim 19 (depends on 17) The method of claim 17, wherein the performance of at least one of the first communication or the second communication using the configuration to prevent damage to the one or more components further comprises: blanking or postponing the second communication in a slot, wherein the first communication is scheduled for the slot; and performing the first communication in the slot. ### Claim 20 (depends on 17) The method of claim 17, wherein the identification of the one or more components further comprises: identifying that the TRX switch is shared between the first communication and the second communication based at least in part on the first communication and the second communication being associated with a same power amplifier. ### Claim 21 (depends on 17) The method of claim 17, wherein the first communication is a transmission, and wherein the performance of at least one of the first communication or the second communication using the configuration to prevent damage to the one or more components further comprises: performing at least one of the first communication or the second communication with an input of the LNA terminated at a threshold resistance load. ### Claim 22 (depends on 17) The method of claim 17, wherein the first communication is a transmission, and wherein the performance of at least one of the first communication or the second communication using the configuration to prevent damage to the one or more components further comprises: performing at least one of the first communication or the second communication using a high impedance mode at the LNA. ### Claim 23 (depends on 17) The method of claim 17, wherein the first communication is a transmission, and wherein the performance of at least one of the first communication or the second communication using the configuration to prevent damage to the one or more components further comprises: performing at least one of the first communication or the second communication with the LNA terminated to ground. ### Claim 24 (depends on 17) The method of claim 17, further comprising: identifying a switch request of the cross-switch, wherein performing at least one of the first communication or the second communication using the configuration to prevent damage to the one or more components is based at least in part on which subscriber, of the first subscriber and the second subscriber, triggered the switch request. ### Claim 25 A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising: one or more instructions that, when executed by one or more processors of a user equipment (UE), cause the UE to: establish a first communication associated with a first priority, wherein the first communication is associated with a first subscriber in a connected mode, the first communication is ongoing; establish a second communication associated with a second priority, wherein the second communication is associated with a second subscriber in the connected mode, the first priority is higher than the second priority; identify one or more components shared between the first communication and the second communication, wherein the one or more components are included in a radio frequency front-end (RFFE) of the UE, are switchable between the first subscriber and the second subscriber, and include at least one of: a transmit/receive (TRX) switch, a low noise amplifier (LNA), or a cross-switch; and perform at least one of the first communication or the second communication using a configuration to prevent damage to the one or more components of the UE based at least in part on the one or more components being shared between the first communication and the second communication, wherein perform of at least one of the first communication or the second communication using the configuration to prevent damage to the one or more components comprises: prevent the TRX switch from switching to a state associated with the second communication. ### Claim 26 An apparatus for wireless communication, comprising: means for establishing a first communication associated with a first priority, wherein the first communication is associated with a first subscriber in a connected mode, the first communication is ongoing; means for establishing a second communication associated with a second priority, wherein the second communication is associated with a second subscriber in the connected mode, the first priority is higher than the second priority; means for identifying one or more components shared between the first communication and the second communication, wherein the one or more components are included in a radio frequency front-end (RFFE) of the apparatus, are switchable between the first subscriber and the second subscriber, and include at least one of: a transmit/receive (TRX) switch, a low noise amplifier (LNA), or a cross-switch; and means for performing at least one of the first communication or the second communication using a configuration to prevent damage to the one or more components of the UE based at least in part on the one or more components being shared between the first communication and the second communication, wherein the means for performing of at least one of the first communication or the second communication using the configuration to prevent damage to the one or more components further comprises: means for preventing the TRX switch from switching to a state associated with the second communication.