# US 2014/0153629 A1 · Method and apparatus for analyzing crosstalk between lines > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0153629 A1 - Document ID: US20140153629A1 - Status: Published application - Kind: A1 - Application number: 14/176,227 - Filed: 2014-02-10 - Published: 2014-06-05 - Earliest claimed: 2011-08-10 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Yahong Gao; Jianping Tu; Dawei Sun - Web page: https://patentgrep.com/patent/US20140153629A1 ## CPC - H04B 3/46: Monitoring; Testing - H04B 3/487: Testing crosstalk effects - H04M 3/34: Testing for cross-talk - H04M 11/062: {using different frequency bands for speech and other data} - H04B 3/32: Reducing cross-talk, e.g. by compensating - H04B: TRANSMISSION - H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08) ## Abstract Embodiments of the present invention provide a method and an apparatus for analyzing crosstalk between lines, where the method includes: performing frequency spectrum notching on a specific frequency band of lines of which the number is a first number among multiple lines, collecting a first group of state performance parameters of each line of lines of which the number is a second number among the multiple lines; canceling frequency spectrum notching on the specific frequency band of the to-be-analyzed line, collecting a second group of state performance parameters of each line of the lines of which the number is the second number; and determining, according to the first and second groups of state performance parameters, crosstalk of each line of the lines of which the number is the second number into the to-be-analyzed line on the specific frequency band. ## Claims ### Claim 1 A method for analyzing crosstalk between lines, comprising: performing frequency spectrum notching on a specific frequency band of lines of which the number is a first number among multiple lines, collecting a first group of state performance parameters of each line of lines of which the number is a second number among the multiple lines, wherein the lines of which the number is the first number comprise a to-be-analyzed line; canceling frequency spectrum notching on the specific frequency band of the to-be-analyzed line, and collecting a second group of state performance parameters of each line of the lines of which the number is the second number; and determining, according to the first and second groups of state performance parameters, crosstalk of each line of the lines of which the number is the second number into the to-be-analyzed line on the specific frequency band. ### Claim 2 (depends on 1) The method according to claim 1, wherein the first and second groups of state performance parameters comprise transmission power, line attenuation and a signal-to-noise ratio of each line of the lines of which the number is the second number on the specific frequency band, and the determining, according to the first and second groups of state performance parameters, crosstalk of each line of the lines of which the number is the second number into the to-be-analyzed line on the specific frequency band comprises: determining, according to the transmission power, the line attenuation and the signal-to-noise ratio which are of each line of the lines of which the number is the second number on the specific frequency band and are comprised in the first and second groups of state performance parameters, the crosstalk of each line of the lines of which the number is the second number into the to-be-analyzed line on the specific frequency band. ### Claim 3 (depends on 1) The method according to claim 1, wherein the determining, according to the first and second groups of state performance parameters, crosstalk of each line of the lines of which the number is the second number into the to-be-analyzed line on the specific frequency band comprises: determining, according to the first and second groups of state performance parameters, crosstalk of the to-be-analyzed line into each line of the lines of which the number is the second number on the specific frequency band; and determining, based on the crosstalk of the to-be-analyzed line into each line of the lines of which the number is the second number on the specific frequency band and according to a crosstalk dual relationship, the crosstalk of each line of the lines of which the number is the second number into the to-be-analyzed line on the specific frequency band. ### Claim 4 (depends on 1) The method according to claim 1, further comprising: determining a crosstalk source of the to-be-analyzed line according to the determined crosstalk of each line of the lines of which the number is the second number into the to-be-analyzed line on the specific frequency band. ### Claim 5 (depends on 4) The method according to claim 4, wherein the determining a crosstalk source of the to-be-analyzed line according to the determined crosstalk of each line of the lines of which the number is the second number into the to-be-analyzed line on the specific frequency band comprises: determining a line which is in the lines of which the number is the second number and whose crosstalk into the to-be-analyzed line on the specific frequency band is larger than a threshold as the crosstalk source of the to-be-analyzed line. ### Claim 6 (depends on 1) The method according to claim 1, further comprising: determining, according to determined crosstalk of a specific line of the lines of which the number is the second number into the to-be-analyzed line on the specific frequency band, crosstalk of the specific line into the to-be-analyzed line on another frequency band. ### Claim 7 (depends on 6) The method according to claim 6, wherein the determining, according to determined crosstalk of a specific line of the lines of which the number is the second number into the to-be-analyzed line on the specific frequency band, crosstalk of the specific line into the to-be-analyzed line on another frequency band comprises: determining the crosstalk |HFEXT(f)| of the specific line into the to-be-analyzed line on the another frequency band according to the following formula: |HFEXT(f)|2=|Hchannel(f)|2×k×l×f2, wherein |Hchannel(f)| represents a channel transmission function, and is obtained according to collected line attenuation; l represents a coupling length; k represents a coupling constant; and f represents a frequency. ### Claim 8 A method for analyzing crosstalk between lines, comprising: performing frequency spectrum notching on a specific frequency band of lines of which the number is a first number among multiple lines, collecting a first group of state performance parameters of each line of lines of which the number is a second number among the multiple lines, wherein the lines of which the number is the first number comprise to-be-analyzed lines of which the number is a specific number; canceling frequency spectrum notching on a specific frequency band of a to-be-analyzed line whose frequency spectrum notching is not canceled among the to-be-analyzed lines of which the number is the specific number, and collecting a second group of state performance parameters of each line of the lines of which the number is the second number; determining, according to the first and second groups of state performance parameters, crosstalk of each line of the lines of which the number is the second number into the to-be-analyzed line on the specific frequency band; and determining whether a line whose frequency spectrum notching is not canceled exists in the to-be-analyzed lines of which the number is the specific number, wherein when a line whose frequency spectrum notching is not canceled exists, the method returns to canceling frequency spectrum notching on a specific frequency band of a to-be-analyzed line whose frequency spectrum notching is not canceled among the to-be-analyzed lines of which the number is the specific number, and collecting a second group of state performance parameters of each line of the lines of which the number is the second number; and when no line whose frequency spectrum notching is not canceled exists, the method ends. ### Claim 9 An apparatus for analyzing crosstalk between lines, comprising: a data collector, configured to collect state performance parameters of a line; a configurator, configured to perform frequency spectrum notching on a specific frequency band of a line or cancel frequency spectrum notching on the specific frequency band of the line; and an analysis controller, configured to control an operation by the configurator of frequency spectrum notching or canceling frequency spectrum notching, obtain the state performance parameters of the line from the data collector, and determine crosstalk of a line into another line according to the obtained state performance parameters. ### Claim 10 (depends on 9) The apparatus according to claim 9, wherein the analysis controller controls the configurator to perform frequency spectrum notching on a specific frequency band of lines of which the number is a first number of multiple lines, and obtains, from the data collector, a first group of state performance parameters of each line of lines of which the number is a second number of the multiple lines, wherein the lines of which the number is the first number comprise a to-be-analyzed line; controls the configurator to cancel frequency spectrum notching on the specific frequency band of the to-be-analyzed line, and obtains, from the data collector, a second group of state performance parameters of each line of the lines of which the number is the second number again; and determines, according to the first and second groups of state performance parameters, crosstalk of each line of the lines of which the number is the second number into the to-be-analyzed line on the specific frequency band. ### Claim 11 (depends on 10) The apparatus according to claim 10, wherein that the analysis controller determines, according to the first and second groups of state performance parameters, crosstalk of each line of the lines of which the number is the second number into the to-be-analyzed line on the specific frequency band is implemented through the following manner: determining, according to the first and second groups of state performance parameters, crosstalk of the to-be-analyzed line into each line of the lines of which the number is the second number on the specific frequency band; and determining, based on the crosstalk of the to-be-analyzed line into each line of the lines of which the number is the second number on the specific frequency band and according to a crosstalk dual relationship, the crosstalk of each line of the lines of which the number is the second number into the to-be-analyzed line on the specific frequency band. ### Claim 12 (depends on 10) The apparatus according to claim 10, wherein the first and second groups of state performance parameters comprise transmission power, line attenuation and a signal-to-noise ratio of each line of the lines of which the number is the second number on the specific frequency band, and the analysis controller determines, according to the transmission power, the line attenuation and the signal-to-noise ratio which are of each line of the lines of which the number is the second number on the specific frequency band and comprised in the first and second groups of state performance parameters, the crosstalk of each line of the lines of which the number is the second number into the to-be-analyzed line on the specific frequency band. ### Claim 13 (depends on 10) The apparatus according to claim 10, wherein the analysis controller determines a crosstalk source of the to-be-analyzed line according to the determined crosstalk of each line of the lines of which the number is the second number into the to-be-analyzed line on the specific frequency band. ### Claim 14 (depends on 13) The apparatus according to claim 13, wherein the analysis controller determines a line which is in the lines of which the number is the second number and whose crosstalk into the to-be-analyzed line on the specific frequency band is larger than a threshold as the crosstalk source. ### Claim 15 (depends on 10) The apparatus according to claim 10, wherein the analysis controller determines, according to determined crosstalk of a specific line of the lines of which the number is the second number into the to-be-analyzed line on the specific frequency band, crosstalk of the specific line into the to-be-analyzed line on another frequency band. ### Claim 16 (depends on 15) The apparatus according to claim 15, wherein the analysis controller determines the crosstalk |HFEXT(f)| of the specific line into the to-be-analyzed line on the another frequency band according to the following formula: |HFEXT(f)|2=|Hchannel(f)|2×k×l×f2, wherein |Hchannel(f)| represents a channel transmission function, and is obtained according to collected line attenuation; l represents a coupling length; k represents a coupling constant; and f represents a frequency.