Improved distributed band-preference dynamic spectrum management for upstream VDSL2

Crosstalk is a key factor that can cause performance degradation in VDSL2. Balancing the transmit power spectra refers to as spectrum management to diminish the impact of crosstalk. The distributed band-preference spectrum management (DBPSM) adopts a bit-moving process to highlight the data rates of weak users. However, it still leaves room for improvement. This paper proposes a new tone and band selection method to improve the performance of DBPSM and proves that the new tone selection method makes the bit-moving process more efficient. Simulation results show that the new band selection method can increase the data rates of weak users.