# US 11,909,675 B2 · Interference source identification method, related device, and computer storage medium > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,909,675 B2 - Document ID: US11909675B2 - Status: Granted - Kind: B2 - Application number: 17/173,253 - Filed: 2021-02-11 - Published: 2021-06-03 - Granted: 2024-02-20 - Earliest claimed: 2018-11-28 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Lv Ding; Jun Wu; Jiyuan Shi; Fuxing Chen - Web page: https://patentgrep.com/patent/US11909675B2 ## CPC - H04L 5/0032: {Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation} - H04W 24/08: Testing, {supervising or monitoring} using real traffic - H04B 17/345: Interference values ({signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]} H04B17/336) - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 72/541: using the level of interference - H04W 84/12: WLAN [Wireless Local Area Networks] - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - 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 An interference source identification method includes obtaining a first parameter, where the first parameter includes a co-channel interference rate of a first access point in a preset time period, a receive channel utilization rate and a transmit channel utilization rate of a second access point in the preset time period, and a receive frame rate of data received from a first station by the second access point in the preset time period, and determining that the data causes co-channel interference to the first access point when the first parameter meets a preset condition. ## Claims ### Claim 1 An interference source identification method comprising: obtaining a first parameter comprising a co-channel interference rate of a first access point in a preset time period, a receive channel utilization rate of a second access point in the preset time period, a transmit channel utilization rate of the second access point in the preset time period, and a receive frame rate of first data received from a first station by the second access point in the preset time period, wherein the preset time period comprises a plurality of first sampling periods, wherein the co-channel interference rate comprises a first ratio of a second sampling period and a first time period that the first access point receives interference data in the second sampling period, wherein the receive channel utilization rate comprises a second ratio of the second sampling period and a second time period that the second access point receives wanted data in the second sampling period, wherein the transmit channel utilization rate comprises a third ratio of the second sampling period and a third time period that the second access point sends second data in the second sampling period, and wherein the receive frame rate is of third data received from the first station by the second access point in the second sampling period; and determining that the first data causes co-channel interference to the first access point when the first parameter meets a first preset condition. ### Claim 2 (depends on 1) The interference source identification method of claim 1, further comprising further determining that the first data causes the co-channel interference to the first access point when the co-channel interference rate is correlated with the receive channel utilization rate, the co-channel interference rate is not correlated with the transmit channel utilization rate, the receive frame rate is correlated with the receive channel utilization rate, and a receive frame rate mean value of the receive frame rate is greater than a receive frame rate threshold, wherein the receive frame rate mean value is of receive frame rates collected in the first sampling periods. ### Claim 3 (depends on 2) The interference source identification method of claim 2, further comprising: determining that the co-channel interference rate is correlated with the receive channel utilization rate when a first absolute value of a first correlation coefficient between the co-channel interference rate and the receive channel utilization rate is greater than a first correlation threshold, wherein the first correlation coefficient comprises any one of a Pearson correlation coefficient, a Spearman correlation coefficient, or a Kendall correlation coefficient; determining that the co-channel interference rate is not correlated with the transmit channel utilization rate when a second absolute value of a second correlation coefficient between the co-channel interference rate and the transmit channel utilization rate is less than a second correlation threshold, wherein the second correlation coefficient comprises any one of the Pearson correlation coefficient, the Spearman correlation coefficient, or the Kendall correlation coefficient; and determining that the receive frame rate is correlated with the receive channel utilization rate when a third absolute value of a third correlation coefficient between the receive frame rate and the receive channel utilization rate is greater than a third correlation threshold, wherein the third correlation coefficient comprises any one of the Pearson correlation coefficient, the Spearman correlation coefficient, or the Kendall correlation coefficient. ### Claim 4 (depends on 2) The interference source identification method of claim 2, further comprising: determining that the co-channel interference rate is correlated with the receive channel utilization rate when a fourth absolute value of a fourth correlation coefficient between the co-channel interference rate and the receive channel utilization rate is less than a fourth correlation threshold; determining that the co-channel interference rate is not correlated with the transmit channel utilization rate when a fifth absolute value of a fifth correlation coefficient between the co-channel interference rate and the transmit channel utilization rate is greater than a fifth correlation threshold; and determining that the receive frame rate is correlated with the receive channel utilization rate when a sixth absolute value of a sixth correlation coefficient between the receive frame rate and the receive channel utilization rate is less than a sixth correlation threshold, wherein the fourth correlation coefficient, the fifth correlation coefficient, and the sixth correlation coefficient are time warping distances. ### Claim 5 (depends on 1) The interference source identification method of claim 1, further comprising: determining a second parameter comprising at least one of a co-channel interference rate mean value, a co-channel interference rate peak value, or a co-channel interference rate proportion, wherein the co-channel interference rate mean value is of a plurality of co-channel interference rates collected in the preset time period, wherein the co-channel interference rate peak value is a maximum value of the co-channel interference rates, and wherein the co-channel interference rate proportion is of co-channel interference rates that are greater than the co-channel interference rate mean value; and further determining that the first data causes the co-channel interference to the first access point when the co-channel interference rate mean value is greater than a co-channel interference rate mean value threshold, the co-channel interference rate peak value is greater than a co-channel interference rate peak value threshold, and the co-channel interference rate proportion is greater than a co-channel interference rate proportion threshold. ### Claim 6 (depends on 1) The interference source identification method of claim 1, further comprising further obtaining the first parameter from a collector. ### Claim 7 An interference source identification apparatus, comprising: a memory configured to store computer-readable instructions; and a processor coupled to the memory, wherein the computer-readable instructions cause the processor to be configured to: obtain a first parameter comprising a co-channel interference rate of a first access point in a preset time period, a receive channel utilization rate of a second access point in the preset time period, a transmit channel utilization rate of the second access point in the preset time period, and a receive frame rate of first data received from a first station by the second access point in the preset time period, wherein the preset time period comprises a plurality of first sampling periods, wherein the co-channel interference rate comprises a first ratio of a second sampling period and a first time period that the first access point receives interference data in the second sampling period, wherein the receive channel utilization rate comprises a second ratio of the second sampling period and a second time period that the second access point receives wanted data in the second sampling period, wherein the transmit channel utilization rate comprises a third ratio of the second sampling period and a third time period that the second access point sends second data in the second sampling period, and wherein the receive frame rate is of a third data received from the first station by the second access point in the second sampling period; and determine that the first data causes co-channel interference to the first access point when the first parameter meets a first preset condition. ### Claim 8 (depends on 7) The interference source identification apparatus of claim 7, wherein the computer-readable instructions further cause the processor to be configured to further determine that the first data causes the co-channel interference to the first access point when the co-channel interference rate is correlated with the receive channel utilization rate, the co-channel interference rate is not correlated with the transmit channel utilization rate, the receive frame rate is correlated with the receive channel utilization rate, and a receive frame rate mean value of the receive frame rate is greater than a receive frame rate threshold, and wherein the receive frame rate mean value is of receive frame rates collected in the first sampling periods. ### Claim 9 (depends on 8) The interference source identification apparatus of claim 8, wherein the computer-readable instructions further cause the processor to be configured to: determine that the co-channel interference rate is correlated with the receive channel utilization rate when a first absolute value of a first correlation coefficient between the co-channel interference rate and the receive channel utilization rate is greater than a first correlation threshold, wherein the first correlation coefficient comprises any one of a Pearson correlation coefficient, a Spearman correlation coefficient, or a Kendall correlation coefficient; determine that the co-channel interference rate is not correlated with the transmit channel utilization rate when a second absolute value of a second correlation coefficient between the co-channel interference rate and the transmit channel utilization rate is less than a second correlation threshold, wherein the second correlation coefficient comprises any one of the Pearson correlation coefficient, the Spearman correlation coefficient, or the Kendall correlation coefficient; and determine that the receive frame rate is correlated with the receive channel utilization rate when a third absolute value of a third correlation coefficient between the receive frame rate and the receive channel utilization rate is greater than a third correlation threshold, wherein the third correlation coefficient comprises any one of the Pearson correlation coefficient, the Spearman correlation coefficient, or the Kendall correlation coefficient. ### Claim 10 (depends on 8) The interference source identification apparatus of claim 8, wherein the computer-readable instructions further cause the processor to be configured to: determine that the co-channel interference rate is correlated with the receive channel utilization rate when a fourth absolute value of a fourth correlation coefficient between the co-channel interference rate and the receive channel utilization rate is less than a fourth correlation threshold; determine that the co-channel interference rate is not correlated with the transmit channel utilization rate when a fifth absolute value of a fifth correlation coefficient between the co-channel interference rate and the transmit channel utilization rate is greater than a fifth correlation threshold; and determine that the receive frame rate is correlated with the receive channel utilization rate when a sixth absolute value of a sixth correlation coefficient between the receive frame rate and the receive channel utilization rate is less than a sixth correlation threshold, wherein the fourth correlation coefficient, the fifth correlation coefficient, and the sixth correlation coefficient are time warping distances. ### Claim 11 (depends on 7) The interference source identification apparatus of claim 7, wherein the computer-readable instructions further cause the processor to be configured to: determine a second parameter comprising at least one of a co-channel interference rate mean value, a co-channel interference rate peak value, or a co-channel interference rate proportion, wherein the co-channel interference rate mean value is of a plurality of co-channel interference rates collected in the preset time period, wherein the co-channel interference rate peak value is a maximum value of the co-channel interference rates, and wherein the co-channel interference rate proportion is of co-channel interference rates that are greater than the co-channel interference rate mean value; and further determine that the first data causes the co-channel interference to the first access point when the co-channel interference rate mean value is greater than a co-channel interference rate mean value threshold, the co-channel interference rate peak value is greater than a co-channel interference rate peak value threshold, and the co-channel interference rate proportion is greater than a co-channel interference rate proportion threshold. ### Claim 12 (depends on 7) The interference source identification apparatus of claim 7, wherein the computer-readable instructions further cause the processor to be configured to further obtain the first parameter from a collector. ### Claim 13 A computer program product comprising computer-executable instructions stored on a non-transitory computer storage medium that, when executed by a processor, cause an apparatus to: obtain a first parameter comprising a co-channel interference rate of a first access point in a preset time period, a receive channel utilization rate of a second access point in the preset time period, a transmit channel utilization rate of the second access point in the preset time period, and a receive frame rate of first data received from a first station by the second access point in the preset time period, wherein the preset time period comprises a plurality of first sampling periods, wherein the co-channel interference rate comprises a first ratio of a second sampling period and a first time period that the first access point receives interference data in the second sampling period, wherein the receive channel utilization rate comprises a second ratio of the second sampling period and a second time period that the second access point receives wanted data in the second sampling period, wherein the transmit channel utilization rate comprises a third ratio of the second sampling period and a third time period that the second access point sends second data in the second sampling period, and wherein the receive frame rate is of third data received from the first station by the second access point in the second sampling period; and determine that the first data causes co-channel interference to the first access point when the first parameter meets a first preset condition. ### Claim 14 (depends on 13) The computer program product of claim 13, wherein the computer-executable instructions further cause the apparatus to further determine that the first data causes the co-channel interference to the first access point when the co-channel interference rate is correlated with the receive channel utilization rate, the co-channel interference rate is not correlated with the transmit channel utilization rate, the receive frame rate is correlated with the receive channel utilization rate, and a receive frame rate mean value of the receive frame rate is greater than a receive frame rate threshold, and wherein the receive frame rate mean value is of receive frame rates collected in the first sampling periods. ### Claim 15 (depends on 14) The computer program product of claim 14, wherein the computer-executable instructions further cause the apparatus to: determine that the co-channel interference rate is correlated with the receive channel utilization rate when a first absolute value of a first correlation coefficient between the co-channel interference rate and the receive channel utilization rate is greater than a first correlation threshold, wherein the first correlation coefficient comprises any one of a Pearson correlation coefficient, a Spearman correlation coefficient, or a Kendall correlation coefficient; determine that the co-channel interference rate is not correlated with the transmit channel utilization rate when a second absolute value of a second correlation coefficient between the co-channel interference rate and the transmit channel utilization rate is less than a second correlation threshold, wherein the second correlation coefficient comprises any one of the Pearson correlation coefficient, the Spearman correlation coefficient, or the Kendall correlation coefficient; and determine that the receive frame rate is correlated with the receive channel utilization rate when a third absolute value of a third correlation coefficient between the receive frame rate and the receive channel utilization rate is greater than a third correlation threshold, wherein the third correlation coefficient comprises any one of the Pearson correlation coefficient, the Spearman correlation coefficient, or the Kendall correlation coefficient. ### Claim 16 (depends on 14) The computer program product of claim 14, wherein the computer-executable instructions further cause the apparatus to: determine that the co-channel interference rate is correlated with the receive channel utilization rate when a fourth absolute value of a fourth correlation coefficient between the co-channel interference rate and the receive channel utilization rate is less than a fourth correlation threshold; determine that the co-channel interference rate is not correlated with the transmit channel utilization rate when a fifth absolute value of a fifth correlation coefficient between the co-channel interference rate and the transmit channel utilization rate is greater than a fifth correlation threshold; and determine that the receive frame rate is correlated with the receive channel utilization rate when a sixth absolute value of a sixth correlation coefficient between the receive frame rate and the receive channel utilization rate is less than a sixth correlation threshold, wherein the fourth correlation coefficient, the fifth correlation coefficient, and the sixth correlation coefficient are time warping distances. ### Claim 17 (depends on 13) The computer program product of claim 13, wherein the computer-executable instructions further cause the apparatus to: determine a second parameter comprising at least one of a co-channel interference rate mean value, a co-channel interference rate peak value, or a co-channel interference rate proportion, wherein the co-channel interference rate mean value is of a plurality of co-channel interference rates collected in the preset time period, wherein the co-channel interference rate peak value is a maximum value of the co-channel interference rates, and wherein the co-channel interference rate proportion is of co-channel interference rates that are greater than the co-channel interference rate mean value; and further determine that the first data causes the co-channel interference to the first access point when the co-channel interference rate mean value is greater than a co-channel interference rate mean value threshold, the co-channel interference rate peak value is greater than a co-channel interference rate peak value threshold, and the co-channel interference rate proportion is greater than a co-channel interference rate proportion threshold. ### Claim 18 (depends on 1) The interference source identification method of claim 1, further comprising determining that the first data causes the co-channel interference to the first access point when a second parameter meets a second preset condition, wherein the second parameter comprises at least one of a co-channel interference rate mean value, a co-channel interference rate peak value, or a co-channel interference rate proportion. ### Claim 19 (depends on 7) The interference source identification apparatus of claim 7, wherein the computer-readable instructions further cause the processor to be configured to determine that the first data causes the co-channel interference to the first access point when a second parameter meets a second preset condition, and wherein the second parameter comprises at least one of a co-channel interference rate mean value, a co-channel interference rate peak value, or a co-channel interference rate proportion. ### Claim 20 (depends on 13) The computer program product of claim 13, wherein the computer-executable instructions further cause the apparatus to further obtain the first parameter from a collector.