Dynamic power spectrum management method, spectrum optimization system and client device

摘要

The present invention provides a dynamic power spectrum management method, a spectrum optimization system, and a client device, which can improve spectrum management. The method includes: calculating, from a tax factor containing user crosstalk information, a water-filling parameter corresponding to the case that total power of each user is below or equal to a threshold of total power of the user; calculating, from the water-filling parameter, power allocated to each user in each sub-carrier until convergence is attained for all users. Correspondingly, the present invention further provides a spectrum optimization system and a client device. In effect, the present invention can improve the spectrum management.

主权项

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:
influence on the user caused by interference from other users on each sub-carrier; andinfluence on a relative rate weight coefficient for the user; 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:
obtaining the value of a weighted rate sum of all users as a value of an objective function;calculating a temporary tax factor, and calculating from the temporary tax factor a temporary value of the objective function; andcomparing the value of the objective function with the temporary value of the objective function, and determining the tax factor based on a comparison result.