# US 10,455,616 B2 · Interference management techniques for full-duplex wireless communications > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,455,616 B2 - Document ID: US10455616B2 - Status: Granted - Kind: B2 - Application number: 15/309,433 - Filed: 2014-06-05 - Published: 2017-05-25 - Granted: 2019-10-22 - Earliest claimed: 2014-06-05 - Assignees: Intel IP Corporation - Applicants: Intel IP Corporation - Inventors: Po-Kai Huang; Robert Stacey - Web page: https://patentgrep.com/patent/US10455616B2 ## CPC - H04W 74/0816: with collision avoidance - H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)} - H04W 12/06: Authentication - H04W 52/16: Deriving transmission power values from another channel - H04W 52/367: {Power values between minimum and maximum limits, e.g. dynamic range} - H04W 74/085: {collision avoidance} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract Interference management techniques for full-duplex wireless communications are described. In one embodiment, for example, an apparatus may comprise logic, at least a portion of which is in hardware, the logic to initiate a downlink (DL) transmission procedure for sending a DL data transmission, and during the DL transmission procedure, send an interference-contingent uplink (UL) transmission invitation identifying a destination of the DL data transmission and begin receiving a UL data transmission in response to the interference-contingent UL transmission invitation. Other embodiments are described and claimed. ## Claims ### Claim 1 An apparatus, comprising: logic, at least a portion of which is in hardware, the logic to initiate a downlink (DL) transmission procedure for sending a DL data transmission, and during the DL transmission procedure, send an interference-contingent uplink (UL) transmission invitation identifying a destination of the DL data transmission and begin receiving a UL data transmission in response to the interference-contingent UL transmission invitation, the interference-contingent UL transmission invitation comprising a collateral interference margin for the DL data transmission. ### Claim 2 (depends on 1) The apparatus of claim 1, the interference-contingent UL transmission invitation comprising a request-to-send (RTS). ### Claim 3 (depends on 1) The apparatus of claim 1, the interference-contingent UL transmission invitation comprising an invitation for a specific remote device to perform UL transmission to the apparatus. ### Claim 4 (depends on 1) The apparatus of claim 1, the interference-contingent UL transmission invitation comprising a non-specific invitation for consideration by any of a plurality of remote devices. ### Claim 5 (depends on 1) The apparatus of claim 1, the logic to concurrently send an acknowledgment of the UL data transmission and receive an acknowledgment of the DL data transmission. ### Claim 6 At least one non-transitory computer-readable storage medium comprising a set of instructions that, in response to being executed on a computing device, cause the computing device to: initiate a downlink (DL) transmission procedure for sending a DL data transmission; and during the DL transmission procedure: send an interference-contingent uplink (UL) transmission invitation identifying a destination of the DL data transmission, the interference-contingent UL transmission invitation comprising a collateral interference margin for the DL data transmission; and begin receiving a UL data transmission in response to the interference-contingent UL transmission invitation. ### Claim 7 (depends on 6) The at least one non-transitory computer-readable storage medium of claim 6, the interference-contingent UL transmission invitation comprising a request-to-send (RTS). ### Claim 8 (depends on 6) The at least one non-transitory computer-readable storage medium of claim 6, the interference-contingent UL transmission invitation comprising an invitation for a specific remote device to perform UL transmission to the apparatus. ### Claim 9 (depends on 6) The at least one non-transitory computer-readable storage medium of claim 6, the interference-contingent UL transmission invitation comprising a non-specific invitation for consideration by any of a plurality of remote devices. ### Claim 10 (depends on 6) The at least one non-transitory computer-readable storage medium of claim 6, comprising instructions that, in response to being executed on the computing device, cause the computing device to concurrently send an acknowledgment of the UL data transmission and receive an acknowledgment of the DL data transmission. ### Claim 11 An apparatus, comprising: logic, at least a portion of which is in hardware, the logic to receive an interference-contingent uplink (UL) transmission invitation identifying a destination device of a downlink (DL) data transmission, estimate a collateral interference resulting at the destination device from a prospective UL data transmission, and determine whether to perform the prospective UL data transmission based on a comparison of the estimated collateral interference with a collateral interference margin for the DL data transmission. ### Claim 12 (depends on 11) The apparatus of claim 11, the interference-contingent UL transmission invitation comprising the collateral interference margin for the DL data transmission. ### Claim 13 (depends on 11) The apparatus of claim 11, the logic to overhear a UL message originating from the destination device, the UL message indicating a UL transmit power for the UL message, determine a received signal strength for the UL message, and estimate the collateral interference based on the UL transmit power and the received signal strength. ### Claim 14 (depends on 11) The apparatus of claim 11, the logic to determine a minimum transmit power for the prospective UL data transmission and estimate the collateral interference based on the minimum transmit power. ### Claim 15 (depends on 11) The apparatus of claim 11, the logic to perform a random backoff and determine whether to perform the prospective UL data transmission based on an availability of a wireless channel following the random backoff. ### Claim 16 (depends on 11) The apparatus of claim 11, the logic to adjust a duration of the prospective UL data transmission. ### Claim 17 (depends on 11) The apparatus of claim 11, comprising: a display; a radio frequency (RF) transceiver; and one or more RF antennas. ### Claim 18 At least one non-transitory computer-readable storage medium comprising a set of instructions that, in response to being executed on a computing device, cause the computing device to: receive an interference-contingent uplink (UL) transmission invitation identifying a destination device of a downlink (DL) data transmission; estimate a collateral interference resulting at the destination device from a prospective UL data transmission; and determine whether to perform the prospective UL data transmission based on a comparison of the estimated collateral interference with a collateral interference margin for the DL data transmission. ### Claim 19 (depends on 18) The at least one non-transitory computer-readable storage medium of claim 18, the interference-contingent UL transmission invitation comprising the collateral interference margin for the DL data transmission. ### Claim 20 (depends on 18) The at least one non-transitory computer-readable storage medium of claim 18, comprising instructions that, in response to being executed on the computing device, cause the computing device to: overhear a UL message originating from the destination device, the UL message indicating a UL transmit power for the UL message; determine a received signal strength for the UL message; and estimate the collateral interference based on the UL transmit power and the received signal strength. ### Claim 21 (depends on 18) The at least one non-transitory computer-readable storage medium of claim 18, comprising instructions that, in response to being executed on the computing device, cause the computing device to: determine a minimum transmit power for the prospective UL data transmission; and estimate the collateral interference based on the minimum transmit power. ### Claim 22 (depends on 18) The at least one non-transitory computer-readable storage medium of claim 18, comprising instructions that, in response to being executed on the computing device, cause the computing device to: perform a random backoff; and determine whether to perform the prospective UL data transmission based on an availability of a wireless channel following the random backoff. ### Claim 23 (depends on 18) The at least one non-transitory computer-readable storage medium of claim 18, comprising instructions that, in response to being executed on the computing device, cause the computing device to adjust a duration of the prospective UL data transmission.