Patent ID: 9258790
Filing Date: 2016-02-09
CPC Classification: H04B,H04L,H04W

Claim Text:
1. A dynamic power spectrum management method, applied in a Digital Subscriber Line system which comprises a plurality of sub-carriers, comprising: calculating, from a Lagrange Multiplier and a tax factor, a water-filling parameter of each user corresponding to the case that total power of the user is below or equal to a total power threshold for the user, wherein the tax factor bears user crosstalk information; and calculating, from the water-filling parameter, power allocated to each user in each sub-carrier, wherein the tax factor denotes: transmitting the calculation result; further comprising updating the tax factor of the user after calculating, from the water-filling parameter, the power allocated to each user in each sub-carrier, and wherein the power allocated to each user in each sub-carrier is dependent upon the power of other users in other sub-carriers; and wherein updating the tax factor of each user comprises: