# US 10,374,749 B1 · Proactive interference avoidance for access points > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,374,749 B1 - Document ID: US10374749B1 - Status: Granted - Kind: B1 - Application number: 16/108,475 - Filed: 2018-08-22 - Granted: 2019-08-06 - Earliest claimed: 2018-08-22 - Assignees: Cisco Technology, Inc. - Applicants: Cisco Technology, Inc. - Inventors: Santosh Babaji Kulkarni - Web page: https://patentgrep.com/patent/US10374749B1 ## CPC - H04L 1/0017: {where the mode-switching is based on Quality of Service requirement} - H04B 17/345: Interference values ({signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]} H04B17/336) - H04B 17/373: Predicting channel quality {or other radio frequency [RF]} parameters - H04B 17/3913: {Predictive models, e.g. based on neural network models} - H04L 1/0002: {by adapting the transmission rate} - H04L 1/0068: {by puncturing} - H04L 5/001: {the frequencies being arranged in component carriers} - H04L 5/0062: {Avoidance of ingress interference, e.g. ham radio channels} - H04L 27/0006: {Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio (for spectrum sharing between different networks H04W16/14)} - H04W 72/541: using the level of interference - H04W 88/08: Access point devices - H04W 88/10: adapted for operation in multiple networks, e.g. multi-mode access points - H04W 16/10: Dynamic resource partitioning - H04W 16/14: Spectrum sharing arrangements {between different networks} - H04W 72/542: using measured or perceived quality - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - 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 Systems, methods, and computer-readable media are provided for predicting presence of interfering signals on given wireless channel(s) on which an access point is operating and proactively implementing an interference avoidance process. In one aspect of the present disclosure, a method includes determining, by an access point operating according to a first wireless technology and at a first time, that interference from signals of a second technology will occur, at a second time that is later than the first time, on a channel on which the access point is currently operating; selecting, by the access point, an interference avoidance process based on a plurality of factors; and implementing, by the access point, the interference avoidance process such that at the second time the access point is not operating on one or more sub-channels spanning the channel on which the access point is currently operating. ## Claims ### Claim 1 A method comprising: predicting a second time, by an access point operating according to a first wireless technology and at a first time, that interference from signals of a second technology will occur at the second time that is later than the first time, on a channel on which the access point is currently operating; selecting, by the access point, an interference avoidance process based on a plurality of factors, comprising: first determining it preamble puncturing is available for the access point; and selecting, in response to a positive result to the first determining, the preamble puncturing as the interference avoidance process; second determining, in response to a negative result to the first determining, if there is one or more adjacent channels for the access point to switch to, the one or more adjacent channels having a same bandwidth as the channel on which the access point is currently operating; selecting, in response to a positive result to the second determining, one of the one or more adjacent channels for the access point to switch to if the one or more adjacent channels are available; third determining, in response to a negative result to the second determining if there are one or more channels having a lower bandwidth than the channel on which the access point is currently operating; selecting, in response to a positive result to the third determining, one of the one or more channels having the lower bandwidth for the access point to switch to; and implementing, by the access point, the interference avoidance process such that at the second time the access point is not operating on one or more sub-channels spanning the channel on which the access point is currently operating. ### Claim 2 (depends on 1) The method of claim 1, wherein determining the interference is based on a predictive modeling using past presence of the signals of the second technology on the one or more sub-channels. ### Claim 3 (depends on 1) The method of claim 1, wherein availability of the preamble puncturing is based on a type of the access point. ### Claim 4 An access point configured to operate on a channel according to a first wireless technology, the access point comprising: a memory having computer-readable instructions stored therein; and one or more processors programed to execute the computer-readable instructions to perform operations comprising: predicting a second time, by an access point operating according to a first wireless technology and at a first time, that interference from signals of a second technology will occur, at a the second time that is later than the first time, on a channel on which the access point is currently operating; selecting, by the access point, an interference avoidance process based on a plurality of factors, comprising: first determining if preamble puncturing is available for the access point; and selecting, in response to a positive result to the first determining, the preamble puncturing as the interference avoidance process; second determining, in response to a negative result to the first determining, if there is one or more adjacent channels for the access point to switch to, the one or more adjacent channels having a same bandwidth as the channel on which the access point is currently operating; selecting, in response to a positive result to the second determining, one of the one or more adjacent channels for the access point to switch to if the one or more adjacent channels are available; third determining, in response to a negative result to the second determining if there are one or more channels having a lower bandwidth than the channel on which the access point is currently operating; selecting, in response to a positive result to the third determining, one of the one or more channels having the lower bandwidth for the access point to switch to; and implementing, by the access point, the interference avoidance process such that at the second time the access point is not operating on one or more sub-channels spanning the channel on which the access point is currently operating. ### Claim 5 (depends on 4) The access point of claim 4, wherein determining the interference is based on a predictive modeling using past presence of the signals of the second technology on the one or more sub-channels. ### Claim 6 (depends on 4) The access point of claim 4, wherein availability of the preamble puncturing is based on a type of the access point. ### Claim 7 A non-transitory computer readable media storing instructions that when executed by a processor cause the processor to perform operations comprising: predicting a second time, by an access point operating according to a first wireless technology and at a first time, that interference from signals of a second technology will occur at the second time that is later than the first time, on a channel on which the access point is currently operating; selecting, by the access point, an interference avoidance process based on a plurality of factors, comprising: first determining if preamble puncturing is available for the access point; and selecting, in response to a positive result to the first determining, the preamble puncturing as the interference avoidance process; second determining, in response to a negative result to the first determining, if there is one or more adjacent channels for the access point to switch to, the one or more adjacent channels having a same bandwidth as the channel on which the access point is currently operating; selecting, in response to a positive result to the second determining, one of the one or more adjacent channels for the access point to switch to if the one or more adjacent channels are available; third determining, in response to a negative, result to the second determining if there are one or more channels having a lower bandwidth than the channel on which the access point is currently operating; selecting, in response to a positive result to the third determining, one of the one or more channels having the lower bandwidth for the access point to switch to; and implementing, by the access point, the interference avoidance process such that at the second time the access point is not operating on one or more sub-channels spanning the channel on which the access point is currently operating. ### Claim 8 (depends on 7) The media of claim 7, wherein determining the interference is based on a predictive modeling using past presence of the signals of the second technology on the one or more sub-channels. ### Claim 9 (depends on 7) The media of claim 7, wherein availability of the preamble puncturing is based on a type of the access point.