# US 10,772,052 B2 · Controlling coexistent radio systems in a wireless device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,772,052 B2 - Document ID: US10772052B2 - Status: Granted - Kind: B2 - Application number: 16/009,015 - Filed: 2018-06-14 - Published: 2018-12-20 - Granted: 2020-09-08 - Earliest claimed: 2017-06-16 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Helena Deirdre O'Shea; David Maldonado; Ramakrishna Narayanaswami; Chuan Wang; Wolfgang Roethig - Web page: https://patentgrep.com/patent/US10772052B2 ## CPC - H04W 52/52: using AGC [Automatic Gain Control] circuits or amplifiers - H04B 1/406: {with more than one transmission mode, e.g. analog and digital modes} - H04W 4/80: Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication - H04W 52/0251: {using monitoring of local events, e.g. events related to user activity} - H04W 72/1215: {for collaboration of different radio technologies} - H04W 24/08: Testing, {supervising or monitoring} using real traffic - H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA - H04W 84/12: WLAN [Wireless Local Area Networks] - 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 Disclosed aspects relate to methods and apparatus for coexistent radio frequency (RF) systems in a wireless device. Control of a wireless device includes detecting when a turn on signal is issued to a first radio system, and then controlling the second radio system to either modify the operation of receiver circuitry in the second radio system to protect components within that system, or modify transmit circuitry to stop transmissions for protecting components within one radio system potentially affected by transmission from the other radio system in the wireless device. Disclosed also is monitoring of transmission states of the radio systems based on reading messages between the first and second radio systems and issuing a notification message based thereon such that one of the radio systems may suspend monitoring of a transmit channel for permission to transmit in order to reduce power consumption due to such monitoring of the channel. ## Claims ### Claim 1 A method for controlling a wireless device including coexistent radio frequency (RF) first and second radio systems, the method comprising: detecting in a control logic circuitry when a first turn on signal is issued to the first radio system to transmit signals with a transmit circuitry in the first radio system; and modifying operation of the second radio system with the control logic circuity including at least one of modifying operation of a receiver circuitry in the second radio system or modifying operation of a transmit circuitry in the second radio system including triggering modification of the operation of the transmit or the receiver circuitry in the second radio system with the control logic circuitry, wherein the control logic circuitry is configured to: receive the first turn on signal issued to the first radio system and a second turn on signal issued to the second radio system; and send an output signal to the second radio system responsive to the received first turn on signal, wherein the output signal triggers modification of the operation of at least one of the transmit or the receiver circuitry in the second radio system. ### Claim 2 (depends on 1) The method of claim 1, wherein modifying the operation of the receiver circuitry in the second radio system further comprises: disabling at least one low noise amplifier (LNA) in the second radio system by selectively bypassing the at least one LNA to protect the at least one LNA from transmissions from at least one of the first radio system or the second radio system. ### Claim 3 (depends on 2) The method of claim 2, wherein selectively bypassing the at least one LNA includes coupling an input of the at least one LNA to ground. ### Claim 4 (depends on 1) The method of claim 1, wherein modifying the operation of the receiver circuitry in the second radio system further comprises: selectively reducing a gain of at least one low noise amplifier (LNA) in the second radio system. ### Claim 5 (depends on 4) The method of claim 4, wherein selectively reducing the gain of the at least one LNA includes selectively switching between a plurality of gains. ### Claim 6 (depends on 5) The method of claim 5, wherein selectively switching between the plurality of gains includes selecting an attenuation network from a plurality of attenuation networks having respective gain attenuations and coupling the attenuation network to the at least one LNA. ### Claim 7 (depends on 1) The method of claim 1, wherein the transmit circuitry of the first or the second radio system comprises a power amplifier (PA). ### Claim 8 (depends on 1) The method of claim 1, wherein the first and second radio systems share a common frequency spectrum. ### Claim 9 (depends on 1) The method of claim 1, wherein the first and second radio systems are operable in respective frequency bands that are close in frequency such that transmissions of one radio system affect at least one of receiver and transmit circuitry in the other radio system. ### Claim 10 (depends on 1) The method of claim 1, further comprising: when at least one front end transmit/receive module of a plurality of front end transmit/receive modules is operable for transmitting, controlling operation of one or more of remaining front end transmit/receive modules of the plurality of front end transmit/receive modules to provide protection from the transmitting front end transmit/receive module or reduction of interference with the transmitting front end transmit/receive module, wherein one of the first or second radio systems includes the plurality of front end transmit/receive modules, and wherein each of the plurality of front end transmit/receive modules is configured to be operable independent of other front end transmit/receive modules in the plurality of front end transmit/receive modules. ### Claim 11 (depends on 10) The method of claim 10, wherein controlling the operation of the one or more of the remaining front end transmit/receive modules of the plurality of front end transmit/receive modules includes one of disabling or modifying operation of one of transmit or receiver circuitries in the one or more of the remaining front end transmit/receive modules. ### Claim 12 (depends on 1) The method of claim 1, further comprising: controlling a receiver circuitry in one of the first or second radio systems including a low noise amplifier (LNA) in a power saving gain bypass mode through modifying or disabling operation of the LNA in the power saving gain bypass mode. ### Claim 13 (depends on 12) The method of claim 12, wherein controlling the receiver circuitry in one of the first or second radio systems further comprises: selectively modifying operation of one or more of a plurality of LNAs, wherein at least one of the first and second radio systems includes the plurality of LNAs. ### Claim 14 (depends on 13) The method of claim 13, wherein selectively modifying the operation of the one or more of the plurality of LNAs includes selectively changing a gain of the one or more of the plurality of LNAs. ### Claim 15 (depends on 13) The method of claim 13, wherein selectively modifying the operation of the one or more of the plurality of LNAs is determined based on one or more of operation parameters of the first or the second radio system, and a technology of the first or the second radio system. ### Claim 16 (depends on 1) The method of claim 1, wherein the control logic circuitry is further configured to issue a signal to disable a low noise amplifier (LNA) in the receiver circuitry of the second radio system when the first radio system issues a command to turn on a power amplifier (PA) in the transmit circuitry of the first radio system. ### Claim 17 (depends on 1) The method of claim 1, wherein the control logic circuitry is further configured to issue a signal to disable a low noise amplifier (LNA) in a receiver circuitry of the first radio system when the second radio system issues a command to turn on a power amplifier (PA) in the transmit circuitry of the second radio system. ### Claim 18 (depends on 1) The method of claim 1, wherein the control logic circuitry is further configured to issue a signal to disable a power amplifier (PA) in the transmit circuitry of the second radio system when the first radio system issues a command to turn on a power amplifier (PA) in the transmit circuitry of the first radio system. ### Claim 19 (depends on 1) The method of claim 1, wherein the control logic circuitry is further configured to issue a signal to disable a power amplifier (PA) in the transmit circuitry of the first radio system when the second radio system issues a command to turn on a power amplifier (PA) in the transmit circuitry of the second radio system. ### Claim 20 (depends on 1) The method of claim 1, wherein the control logic circuitry is further configured to disable the transmit circuitry in the first and second radio systems when both the first radio system and the second radio system issue signals indicating that power amplifiers of the transmit circuitry in the first and second radio systems be turned off. ### Claim 21 (depends on 1) The method of claim 1, wherein the control logic circuitry is further configured to turn off receiver circuitries in both the first and second radio systems when at least the transmit circuitry of the first radio system is turned on. ### Claim 22 (depends on 1) The method of claim 1, wherein the first radio system is operable with a Wireless Wide Area Network (WWAN) according to one of LTE-U technology, LTE, Licensed Assist Access (LAA) technology, enhanced LAA (eLAA) technology, E-UTRA Band 47, or 5G New Radio (NR) technology. ### Claim 23 (depends on 1) The method of claim 1, wherein the second radio system is operable with a Wireless Local Area Network (WLAN) according to WiFi technology. ### Claim 24 (depends on 1) The method of claim 1, wherein at least one of the first and second radio systems are respectively communicatively coupled to one or more antennas in the wireless device through an antenna diversity switch. ### Claim 25 (depends on 1) The method of claim 1, further comprising: controlling one of transmit or receiver circuitry in at least one of the first and second radio systems with a transmit/receive (T/R) switching function to selectively disable a path from at least an antenna to a transmit or receiver circuitry. ### Claim 26 (depends on 1) The method of claim 1, wherein components of the first radio system may be utilized by the second radio system for at least one of transmitting or receiving RF signals; and controlling one of the first or second radio systems includes controlling components used in the first radio system by the second radio system or components used in the second radio system by the first radio system. ### Claim 27 A wireless device operable with coexistent radio frequency (RF) first and second radio systems, the wireless device comprising: control logic circuitry configured to: receive a first turn on signal issued by a transceiver in the wireless device to turn on at least a transmit circuitry of the first radio system and a second turn on signal that turns on the second radio system; and control at least one of a receiver circuitry or a transmit circuitry in the second radio system when the first turn on signal is issued to turn on at least the transmit circuitry of the first radio system through sending an output signal responsive to the received first turn on signal to the second radio system to trigger modification of operation of the transmit or the receiver circuitry in the second radio system. ### Claim 28 (depends on 27) The wireless device of claim 27, wherein the control logic circuitry comprises one or more of logic gates, programmable logic devices (PLDs), or field programmable gate arrays (FPGAs). ### Claim 29 (depends on 27) The wireless device of claim 27, wherein controlling the at least one of the receiver circuitry or the transmit circuitry comprises modifying operation of at least one of the receiver circuitry or the transmit circuitry in the second radio system to at least one of: (a) protect the receiver circuitry of the second radio system, or (b) reduce interference from at least the transmit circuitry of the first radio system. ### Claim 30 (depends on 29) The wireless device of claim 29, wherein the control logic circuitry is further configured to trigger modification of operation of the receiver circuitry in the second radio system by disabling at least one low noise amplifier (LNA) in the second radio system by selectively bypassing the at least one LNA to protect the at least one LNA from transmissions from at least one of the first radio system or the second radio system. ### Claim 31 (depends on 30) The wireless device of claim 30, wherein selectively bypassing the at least one LNA includes coupling an input of the at least one LNA to ground. ### Claim 32 (depends on 29) The wireless device of claim 29, wherein modifying the operation of the receiver circuitry in the second radio system further comprises: selectively reducing a gain of at least one low noise amplifier (LNA) in the second radio system. ### Claim 33 (depends on 32) The wireless device of claim 32, wherein selectively reducing the gain of the at least one LNA includes selectively switching between a plurality of gains. ### Claim 34 (depends on 33) The wireless device of claim 33, wherein selectively switching between the plurality of gains includes selecting an attenuation network from a plurality of attenuation networks having respective gain attenuations and coupling the attenuation network to the at least one LNA. ### Claim 35 (depends on 27) The wireless device of claim 27, wherein the transmit circuitry of the first or the second radio system comprises a power amplifier (PA). ### Claim 36 (depends on 27) The wireless device of claim 27, wherein the first and second radio systems share a common frequency spectrum. ### Claim 37 (depends on 27) The wireless device of claim 27, wherein the first and second radio systems are operable in respective frequency bands that are close in frequency such that transmissions of one radio system affect at least one of receiver and transmit circuitries in the other radio system. ### Claim 38 (depends on 27) The wireless device of claim 27, further comprising: one of the first or second radio systems including a plurality of front end transmit/receive modules wherein each of the plurality of front end transmit/receive modules is configured to be operable independent of other front end transmit/receive modules in the plurality of front end transmit/receive modules, wherein the control logic circuitry is further configured to when at least one of the front end transmit/receive modules of the plurality of front end transmit/receive modules is operable for transmitting, control operation of one or more of remaining front end transmit/receive modules of the plurality of front end transmit/receive modules to provide protection from the transmitting front end transmit/receive module or reduction of interference with the transmitting front end transmit/receive module. ### Claim 39 (depends on 38) The wireless device of claim 38, wherein controlling the operation of the one or more of the remaining front end transmit/receive modules of the plurality of front end transmit/receive modules includes one of disabling or modifying operation of one of transmit or receiver circuitries in the one or more of the remaining front end transmit/receive modules. ### Claim 40 (depends on 27) The wireless device of claim 27, wherein the control logic circuitry is further configured to control a receiver circuitry in one of the first or second radio systems including a low noise amplifier (LNA) in a power saving gain bypass mode through modifying or disabling operation of the LNA in the power saving gain bypass mode. ### Claim 41 (depends on 40) The wireless device of claim 40, wherein controlling the receiver circuitry in one of the first or second radio systems further comprises: selectively modifying operation of one or more of a plurality of LNAs, wherein at least one of the first and second radio systems includes the plurality of LNAs. ### Claim 42 (depends on 41) The wireless device of claim 41, wherein selectively modifying the operation of the one or more of the plurality of LNAs includes selectively changing a gain of the one or more of the plurality of LNAs. ### Claim 43 (depends on 41) The wireless device of claim 41, wherein selectively modifying the operation of the one or more of the plurality of LNAs is determined based on one or more of operation parameters of the first or the second radio system, and a technology of the first or the second radio system. ### Claim 44 (depends on 27) The wireless device of claim 27, wherein the control logic circuitry is further configured to issue a signal to disable a low noise amplifier (LNA) in the receiver circuitry of the second radio system when the first radio system issues a command to turn on a power amplifier (PA) in the transmit circuitry of the first radio system. ### Claim 45 (depends on 27) The wireless device of claim 27, wherein the control logic circuitry is further configured to issue a signal to disable a low noise amplifier (LNA) in a receiver circuitry of the first radio system when the second radio system issues a command to turn on a power amplifier (PA) in the transmit circuitry of the second radio system. ### Claim 46 (depends on 27) The wireless device of claim 27, wherein the control logic circuitry is further configured to issue a signal to disable a power amplifier (PA) in the transmit circuitry of the second radio system when the first radio system issues a command to turn on a power amplifier (PA) in the transmit circuitry of the first radio system. ### Claim 47 (depends on 27) The wireless device of claim 27, wherein the control logic circuitry is further configured to issue a signal to disable a power amplifier (PA) in the transmit circuitry of the first radio system when the second radio system issues a command to turn on a power amplifier (PA) in the transmit circuitry of the second radio system. ### Claim 48 (depends on 27) The wireless device of claim 27, wherein the control logic circuitry is further configured to disable the transmit circuitries in the first and second radio systems when both the first radio system and the second radio system receive signals indicating that power amplifiers of the transmit circuitries in the first and second radio systems be turned off. ### Claim 49 (depends on 27) The wireless device of claim 27, wherein the control logic circuitry is further configured to turn off receiver circuitries in both the first and second radio systems when at least the transmit circuitry of the first radio system is turned on. ### Claim 50 (depends on 27) The wireless device of claim 27, wherein the first radio system is operable with a Wireless Wide Area Network (WWAN) according to one of LTE-U technology, LTE, Licensed Assist Access (LAA) technology, enhanced LAA (eLAA) technology, E-UTRA Band 47, or 5G New Radio (NR) technology. ### Claim 51 (depends on 27) The wireless device of claim 27, wherein the second radio system is operable with a Wireless Local Area Network (WLAN) according to WiFi technology. ### Claim 52 (depends on 27) The wireless device of claim 27, wherein at least one of the first and second radio systems are respectively communicatively coupled to one or more antennas in the wireless device through an antenna diversity switch. ### Claim 53 (depends on 27) The wireless device of claim 27, wherein the control logic circuitry is distributed between at least two subsystems in the wireless device. ### Claim 54 (depends on 27) The wireless device of claim 27, wherein the control logic circuitry is integrated within a single subsystem within the wireless device. ### Claim 55 A wireless device operable with coexistent radio frequency (RF) first and second radio systems, the wireless device comprising: means for receiving a first turn on signal issued by a transceiver in the wireless device to turn on at least a transmit circuitry of the first radio system and a second turn on signal that turns on the second radio system; and means for controlling at least one of a receiver circuitry or a transmit circuitry in the second radio system when the first turn on signal is issued to turn on at least the transmit circuitry of the first radio system through sending an output signal responsive to the received first turn on signal to the second radio system to trigger modification of operation of the transmit or the receiver circuitry in the second radio system.