Point-to-Multipoint Communication in Power Line Networks: A Novel FDM Access Method
In Power Line Networks, a link adaptation is realized by combining Multi-Carrier modulations techniques and bit-loading algorithms, resulting in the creation of tone maps. A tone map defines, for each subcarrier on a particular transmission path, the appropriate constellation that has to be applied based on a link quality criterion. Now, a frequently encountered situation happens when one station is requested to forward simultaneously multiple services to several stations of the network. Considering the fact that current PLC networks only work in a Time Division Multiplexing mode, the transmission efficiency in a point-to-multipoint scenario is not optimal.