Patent ID: 8861712

Claim:
A method for reducing line-to-line crosstalk during transmission of a digital subscriber line service, comprising: obtaining, by a service provider, a power spectral density of a line in a process of receiving a service by a service receiving side device before a service is provisioned, the obtaining being according to a service transmission rate and a topology scenario parameter that are provided by the service receiving side device; and provisioning, by the service provider, a service for the service receiving side device according to the power spectral density, wherein the obtaining comprises: presetting, by the service provider, multiple topology scenario parameters, and calculating a maximum line crosstalk value corresponding to each topology scenario parameter; and determining, by the service provider, a topology scenario parameter that is among the multiple preset topology scenario parameters and matches the service receiving side device so as to obtain a maximum line crosstalk value of corresponding lines, and obtaining the power spectral density, through a calculation according to the service transmission rate provided by the service receiving side device.