Dynamic Resource Allocation Based Partial Crosstalk Cancellation in DSL Networks

The main design objective of crosstalk mitigation techniques for DSL systems has been physical layer data rate maximization. However, from the user satisfaction point of view, upper-layer performance metrics like network throughput, stability and delay performance may be more relevant. In this paper, we present a number of dynamic resource allocation based algorithms for partial crosstalk cancellation (PCC) that focus on these upper-layer metrics. A first algorithm focuses on preserving transmission queueing stability while maximizing the data rate. This is then extended towards budget adaptive algorithms, which improve the resource efficiency so as to obtain a trade-off between delay performance and resource consumption. Simulation results demonstrate the improved stability of the proposed algorithms and the obtained trade-off between delay performance and resource consumption.