# US 11,452,102 B2 · Predictive control for radio frequency coexistence management in multi-rf communication device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,452,102 B2 - Document ID: US11452102B2 - Status: Granted - Kind: B2 - Application number: 16/418,720 - Filed: 2019-05-21 - Published: 2019-09-05 - Granted: 2022-09-20 - Earliest claimed: 2013-09-18 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Francis Ngai; Insung Kang; Reza Shahidi - Web page: https://patentgrep.com/patent/US11452102B2 ## CPC - H04W 72/0473: {the resource being transmission power} - H04W 52/241: {taking into account channel quality metrics, e.g. SIR, SNR, CIR or Eb/lo} - H04W 52/243: {taking into account interferences} - H04W 72/1215: {for collaboration of different radio technologies} - H04W 88/06: adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals - H04W 52/40: during macro-diversity or soft handoff - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract The various embodiments provide methods implemented in a multi-RF communication device for managing a victim subscription's de-sense by proactively implementing an RF coexistence management strategy on the victim subscription when an RF coexistence event starts. In various embodiments, a multi-RF communication device may implement an RF coexistence management strategy by determining when an aggressor subscription will de-sense a victim subscription and configuring the victim to anticipate and mitigate de-sense during the aggressor's transmissions. Thus, the various embodiments may provide dramatic improvements to the victim's overall reception performance and overall user experience. ## Claims ### Claim 1 A method for implementing a radio frequency (RF) coexistence management strategy on a multi-RF communication device for managing effects of an aggressor subscription (“aggressor”) on a victim subscription (“victim”), comprising: determining a time that an RF coexistence event will next start, wherein: the RF coexistence event comprises a period in which uplink transmissions on a first RF resource of the communication device overlap in time with downlink reception on a second RF resource of the communication device, and the aggressor is supported by a first wireless communication network associated with the first RF resource and the victim is supported by a second wireless communication network associated with the second RF resource; determining whether a selected power-control remedial action is viable; and implementing the selected power-control remedial action upon the start of the next RF coexistence event in response to determining that the selected power-control remedial action is viable, wherein implementing the selected power-control remedial action comprises: sending a power UP command on the victim's closed-loop downlink power control to the second wireless communication network just before a transmission by the aggressor is about to start; waiting for the aggressor to finish the transmission; and sending a power DOWN command on the victim's closed-loop downlink power control to the second wireless communication network just after the transmission by the aggressor finishes. ### Claim 2 (depends on 1) The method of claim 1, further comprising selecting a power-control remedial action based on estimated effects of a combined interference of a plurality of transmissions by the aggressor on the victim's performance quality. ### Claim 3 (depends on 1) The method of claim 1, further comprising: determining whether the RF coexistence event has ended; and returning the victim to normal operations in response to determining that the RF coexistence event has ended. ### Claim 4 (depends on 1) The method of claim 1, further comprising selecting the selected power-control remedial action based on estimated effects of the aggressor's interference on the victim's performance quality by: determining a target performance quality of the victim; estimating an interference power of the aggressor; estimating a degraded performance quality of the victim based on the estimated interference power of the aggressor; calculating a difference in performance quality between the target performance quality and the degraded performance quality; and determining an increase in signal power of the second wireless communication network to compensate for the difference in performance quality. ### Claim 5 (depends on 4) The method of claim 4, further comprising: determining that the power-control remedial action is not viable in response to determining that: the increase in signal power from the second wireless communication network exceeds a power increase threshold, a downlink channel power of the second wireless communication network is too close to a ceiling to implement the required increase in signal power, or the second wireless communication network is too close to being power-limited on a downlink to implement the required increase in signal power, or any combination thereof; and determining that the power-control remedial action is viable in response to determining that: the increase in signal power from the second wireless communication network does not exceed the power increase threshold, the downlink channel power of the second wireless communication network is not too close to the ceiling to implement the required increase in signal power, or the second wireless communication network is not too close to being power-limited on the downlink to implement the required increase in signal power, or any combination thereof. ### Claim 6 (depends on 1) The method of claim 1, further comprising, responsive to a determination that the power-control remedial action is not viable: sending one of a power DOWN command or a “cease transmitting” command to the second wireless communication network just before the transmission by the aggressor is about to start; performing receive blanking during the transmission by the aggressor; and sending one of a large power UP command or a “resume transmitting” command to the second wireless communication network just after the transmission by the aggressor finishes. ### Claim 7 A multi-RF communication device, comprising: a memory; a plurality of radio frequency (RF) resources; and a processor coupled to the memory, and the plurality of RF resources, wherein the processor is configured with processor-executable instructions to perform operations comprising: determining a time that an RF coexistence event between a victim subscription (“victim”) and an aggressor subscription (“aggressor”) will next start, wherein: the RF coexistence event comprises a period in which uplink transmissions on a first RF resource overlap in time with downlink reception on a second RF resource; and the aggressor activity is supported by a first wireless communication network associated with the first RF resource and the victim activity is supported by a second wireless communication network associated with the second RF resource; determining whether a selected power-control remedial action is viable; and implementing the selected power-control remedial action upon the start of the next RF coexistence event in response to determining that the selected power-control remedial action is viable, wherein implementing the selected power-control remedial action comprises: sending a power UP command on the victim's closed-loop downlink power control to the second wireless communication network just before a transmission by the aggressor is about to start; waiting for the aggressor to finish the transmission; and sending a power DOWN command on the victim's closed-loop downlink power control to the second wireless communication network just after the transmission by the aggressor finishes. ### Claim 8 (depends on 7) The multi-RF communication device of claim 7, wherein the processor is further configured with processor-executable instructions to select a power-control remedial action based on estimated effects of a combined interference of a plurality of transmissions by the aggressor on the victim's performance quality. ### Claim 9 (depends on 7) The multi-RF communication device of claim 7, wherein the processor is configured with processor-executable instructions to perform operations further comprising: determining whether the RF coexistence event has ended; and returning the victim to normal operations in response to determining that the RF coexistence event has ended. ### Claim 10 (depends on 7) The multi-RF communication device of claim 7, wherein the processor is further configured with processor-executable instructions to select a power-control remedial action based on estimated effects of the aggressor's interference on the victim's performance quality by: determining a target performance quality of the victim; estimating an interference power of the aggressor; estimating a degraded performance quality of the victim based on the estimated interference power of the aggressor; calculating a difference in performance quality between the target performance quality and the degraded performance quality; and determining an increase in signal power of the second wireless communication network to compensate for the difference in performance quality. ### Claim 11 (depends on 10) The multi-RF communication device of claim 10 wherein the processor is further configured with processor-executable instructions to perform operations comprising: determining that the power-control remedial action is not viable in response to determining that: the increase in signal power from the second wireless communication network exceeds a power increase threshold, a downlink channel power of the second wireless communication network is too close to a ceiling to implement the required increase in signal power, or the second wireless communication network is too close to being power-limited on a downlink to implement the required increase in signal power, or any combination thereof; and determining that the power-control remedial action is viable in response to determining that: the increase in signal power from the second wireless communication network does not exceed the power increase threshold, the downlink channel power of the second wireless communication network is not too close to the ceiling to implement the required increase in signal power, or the second wireless communication network is not too close to being power-limited on the downlink to implement the required increase in signal power, or any combination thereof. ### Claim 12 (depends on 7) The multi-RF communication device of claim 7, wherein the processor is configured with processor-executable instructions to perform operations further comprising, responsive to a determination that the power-control remedial action is not viable: sending one of a power DOWN command or a “cease transmitting” command to the second wireless communication mobile network just before the transmission by the aggressor is about to start; performing receive blanking during the transmission by the aggressor; and sending one of a large power UP command or a “resume transmitting” command to the second wireless communication network just after the transmission by the aggressor finishes. ### Claim 13 A multi-RF communication device, comprising: means for determining a time that an RF coexistence event will next start between an aggressor subscription (“aggressor”) and a victim subscription (“victim”), wherein: the RF coexistence event comprises a period in which uplink transmissions on a first RF resource of the communication device overlap in time with the victim activity downlink reception on a second RF resource of the communication device, and the aggressor is supported by a first wireless communication network associated with the first RF resource and the victim is supported by a second wireless communication network associated with the second RF resource; means for determining whether the selected power-control remedial action is viable; and means for implementing the selected power-control remedial action upon the start of the next RF coexistence event in response to determining that the power-control remedial action is viable, wherein the means for implementing the selected power-control remedial action comprises: means for sending a power UP command on the victim's closed-loop downlink power control to the second wireless communication network just before a transmission by the aggressor is about to start; means for waiting for the aggressor to finish the transmission; and means for sending a power DOWN command on the victim's closed-loop downlink power control to the second wireless communication network just after the transmission by the aggressor finishes. ### Claim 14 A non-transitory processor-readable storage medium having stored thereon processor-executable software instructions configured to cause a processor of a multi-RF communication device to perform operations comprising: determining a time that an RF coexistence event will next start between an aggressor subscription (“aggressor”) and a victim subscription (“victim”), wherein: the RF coexistence event comprises a period in which uplink transmissions on a first RF resource of the communication device overlap in time with downlink reception on a second RF resource of the communication device, and the aggressor is supported by a first wireless communication network associated with the first RF resource and the victim is supported by a second wireless communication network associated with the second RF resource; determining whether the selected power-control remedial action is viable; and implementing the selected power-control remedial action upon the start of the next RF coexistence event in response to determining that the power-control remedial action is viable, wherein implementing the selected power-control remedial action comprises: sending, to the second wireless communication network, a power UP command on the victim's closed-loop downlink power control just before a transmission by the aggressor is about to start; waiting for the aggressor to finish the transmission; and sending, to the second wireless communication network, a power DOWN command on the victim's closed-loop downlink power control just after the transmission by the aggressor finishes.