Patent ID: 8867712

Claim:
A method for adjusting a power allocation of users in a digital subscriber line environment, which comprises the steps of: determining an intermediate power allocation for at least one user initializing with the digital subscriber line environment based on a new power allocation determined for the digital subscriber line environment containing the at least one user, the intermediate power allocation providing a predefined minimum signal-to-noise ratio margin for active users of the digital subscriber line environment; and determining the intermediate power allocation such that a distance metric between an actual power allocation and the new power allocation is reduced: wherein the distance metric comprises a distance function selected from the group consisting of: Δ ⁡ ( s ⁡ ( i ) , s new ) = ∑ n ⁢ ∑ k ⁢ ( s k n ⁡ ( i ) s k , new n - 1 ) 2 ; Δ ⁡ ( s ⁡ ( i ) , s new ) = ∑ n ⁢ ∑ k ⁢ α k n ⁡ ( s k n ⁡ ( i ) - s k , new n ) 2 ; and Δ ⁡ ( s ⁡ ( i ) , s new ) = ∑ n ⁢ ∑ k ⁢ α k n ⁡ ( s k n ⁡ ( i ) s k , new n - s k , new a s k n ⁡ ( i ) ) 2 ; wherein s k n denotes a power spectrum density of a transmit signal of a user n; k denotes a subchannel or tone; s new is the new power allocation; and s(i) is the intermediate power allocation at a step i.