# US 12,113,582 B2 · Wireless spectrum management and optimization for dual transceiver operation > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,113,582 B2 - Document ID: US12113582B2 - Status: Granted - Kind: B2 - Application number: 18/364,548 - Filed: 2023-08-03 - Published: 2023-11-23 - Granted: 2024-10-08 - Earliest claimed: 2019-03-05 - Assignees: Cisco Technology, Inc. - Applicants: Cisco Technology, Inc. - Inventors: Matthew Aaron Silverman; Pooya Monajemi; Vishal Satyendra Desai; John Martin Blosco - Web page: https://patentgrep.com/patent/US12113582B2 ## CPC - H04B 1/005: {adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges} - H04B 15/00: Suppression or limitation of noise or interference (by means associated with receiver H04B1/10) - H04B 1/38: Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving - H04B 17/318: Received signal strength - H04B 17/382: for resource allocation, admission control or handover - H04W 52/241: {taking into account channel quality metrics, e.g. SIR, SNR, CIR or Eb/lo} - H04W 52/243: {taking into account interferences} - H04B: TRANSMISSION - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract An access point allocates resource units within a first channel to mitigate interference from an adjacent second channel. The access point obtains a measure of signal strength corresponding to each wireless device attached to an access point, and assigns, for each wireless device, resource units with a first frequency band of the first channel to mitigate interference with a second frequency band of a second channel adjacent to the first channel. An assignment between a set of resource units and a particular wireless device is based on the measure of signal strength corresponding to the particular wireless device. The access point communicates with the wireless devices on the resource units. ## Claims ### Claim 1 A method comprising: obtaining a measure of signal strength corresponding to each wireless device of a plurality of wireless devices attached to an access point for a wireless network; assigning for each wireless device, downlink resource units within a first frequency band of a downlink channel to mitigate interference with a second frequency band of an uplink channel adjacent to the downlink channel by assigning downlink resource units within the first frequency band furthest from a center frequency of the second frequency band in descending order of the measure of signal strength such that a strongest wireless device with a highest corresponding measure of signal strength is assigned a first set of downlink resource units closest to the center frequency of the second frequency band; and communicating with the plurality of wireless devices on the downlink resource units. ### Claim 2 (depends on 1) The method of claim 1, further comprising obtaining data to transmit in the downlink channel to at least one wireless device of the plurality of wireless devices, wherein assigning downlink resource units further comprises ordering the plurality of wireless devices according to the measure of signal strength corresponding to each of the plurality of wireless devices. ### Claim 3 (depends on 2) The method of claim 2, further comprising narrowing a baseband filter for transmitting the data in the downlink channel to minimize interference with the uplink channel, wherein communicating with the plurality of wireless devices comprises transmitting the data to the at least one wireless device through the baseband filter. ### Claim 4 (depends on 1) The method of claim 1, further comprising obtaining an indication that at least one wireless device has data to transmit to the access point on the uplink channel, further comprising assigning uplink resource units by: ordering the plurality of wireless devices according to the measure of signal strength corresponding to each of the plurality of wireless devices; and assigning uplink resource units within the second frequency band closest to the first frequency band in descending order such that a strongest wireless device with a highest corresponding measure of signal strength is assigned a first set of uplink resource units closest to the first frequency band and a weakest wireless device with a lowest corresponding measure of signal strength is assigned to a second set of uplink resource units further from the first frequency band. ### Claim 5 (depends on 4) The method of claim 4, wherein communicating with the plurality of wireless devices comprises: sending a trigger frame indicating an assignment between each particular wireless device of the at least one wireless device and a set of uplink resource units assigned to the particular wireless device; and receiving the data from each particular wireless device of the at least one wireless device on the set of uplink resource units assigned to the particular wireless device. ### Claim 6 (depends on 1) The method of claim 1, further comprising updating the measure of signal strength corresponding to each wireless device based on receiving transmissions from each wireless device. ### Claim 7 (depends on 6) The method of claim 6, wherein updating the measure of signal strength comprises saving a time-averaged value of the measure of signal strength. ### Claim 8 An apparatus comprising: a first wireless network interface unit to provide access to a wireless network over a first channel for a plurality of wireless devices; a second wireless network interface unit to provide access to the wireless network over a second channel for the plurality of wireless devices; a memory; and a processor coupled to the memory, the first wireless network interface unit, and the second wireless network interface unit, wherein the processor is configured to: obtain a measure of signal strength corresponding to each wireless device of the plurality of wireless devices; assign for each wireless device, downlink resource units within a first frequency band of the first channel to mitigate interference with a second frequency band of the second channel adjacent to the first channel by assigning downlink resource units within the first frequency band furthest from a center frequency of the second frequency band in descending order of the measure of signal strength such that a strongest wireless device with a highest corresponding measure of signal strength is assigned a first set of downlink resource units closest to the center frequency of the second frequency band; and cause the first wireless network interface unit to communicate with the plurality of wireless devices on the downlink resource units. ### Claim 9 (depends on 8) The apparatus of claim 8, wherein the processor is further configured to obtain data to transmit in the first channel to at least one wireless device of the plurality of wireless devices, wherein assigning downlink resource units further comprises ordering the plurality of wireless devices according to the measure of signal strength corresponding to each of the plurality of wireless devices. ### Claim 10 (depends on 9) The apparatus of claim 9, wherein the processor is further configured to narrow a baseband filter for transmitting the data in the first channel to minimize interference with the second channel, wherein communicating with the plurality of wireless devices comprises transmitting the data to the at least one wireless device through the baseband filter. ### Claim 11 (depends on 8) The apparatus of claim 8, wherein the processor is further configured to obtain an indication that at least one wireless device has data to transmit on the first channel, wherein the processor is configured to assign uplink resource units by: ordering the plurality of wireless devices according to the measure of signal strength corresponding to each of the plurality of wireless devices; and assigning uplink resource units within the second frequency band closest to the first frequency band in descending order such that a strongest wireless device with a highest corresponding measure of signal strength is assigned a first set of uplink resource units closest to the first frequency band and a weakest wireless device with a lowest corresponding measure of signal strength is assigned to a second set of uplink resource units further from the second frequency band. ### Claim 12 (depends on 11) The apparatus of claim 11, wherein the processor is further configured to: cause the first wireless network interface unit to send a trigger frame indicating an assignment between each particular wireless device of the at least one wireless device and a set of uplink resource units assigned to the particular wireless device; and receive the data from each particular wireless device of the at least one wireless device on the set of uplink resource units assigned to the particular wireless device. ### Claim 13 (depends on 8) The apparatus of claim 8, wherein the processor is further configured to update the measure of signal strength corresponding to each wireless device based on receiving transmissions from each wireless device. ### Claim 14 (depends on 13) The apparatus of claim 13, wherein the processor is configured to update the measure of signal strength by saving a time-averaged value of the measure of signal strength in the memory. ### Claim 15 A system comprising: a wireless network controller configured to determine a first frequency band of a downlink channel in a wireless network and a second frequency band of an uplink channel in the wireless network, wherein the first frequency band is adjacent to the second frequency band; and an access point configured to: obtain a measure of signal strength corresponding to each wireless device of a plurality of wireless devices attached to the access point; assign for each wireless device, downlink resource units within the first frequency band of the downlink channel to mitigate interference with the second frequency band of the uplink channel by assigning downlink resource units within the first frequency band furthest from a center frequency of the second frequency band in descending order of the measure of signal strength such that a strongest wireless device with a highest corresponding measure of signal strength is assigned a first set of downlink resource units closest to the center frequency of the second frequency band; and communicate with the plurality of wireless devices on the downlink resource units. ### Claim 16 (depends on 15) The system of claim 15, wherein the access point is further configured to obtain data to transmit in the downlink channel to at least one wireless device of the plurality of wireless devices, and wherein the access point is further configured to assign downlink resource units by ordering the plurality of wireless devices according to the measure of signal strength corresponding to each of the plurality of wireless devices. ### Claim 17 (depends on 16) The system of claim 16, wherein the access point is further configured to: narrow a baseband filter for transmitting the data in the downlink channel to minimize interference with the uplink channel; and communicate with the plurality of wireless devices by transmitting the data to the at least one wireless device through the baseband filter. ### Claim 18 (depends on 15) The system of claim 15, wherein the access point is further configured to obtain an indication that at least one wireless device has data to transmit on the downlink channel, wherein the access point assigns resource units by: ordering the plurality of wireless devices according to the measure of signal strength corresponding to each of the plurality of wireless devices; and assigning resource units within the second frequency band closest to the first frequency band in descending order such that a strongest wireless device with a highest corresponding measure of signal strength is assigned a first set of uplink resource units closest to the second frequency band and a weakest wireless device with a lowest corresponding measure of signal strength is assigned to a second set of uplink resource units further from the second frequency band. ### Claim 19 (depends on 18) The system of claim 18, wherein the access point is configured to communicate with the plurality of wireless devices by: sending a trigger frame indicating an assignment between each particular wireless device of the at least one wireless device and a set of uplink resource units assigned to the particular wireless device; and receiving the data from each particular wireless device of the at least one wireless device on the set of uplink resource units assigned to the particular wireless device. ### Claim 20 (depends on 15) The system of claim 15, wherein the wireless network controller is configured to determine the first frequency band and the second frequency band to be separated by a guard band of frequencies based on the access point mitigating interference between the downlink channel and the uplink channel.