Traffic management for voice/data convergence in \ADSL\
Teletraffic Engineering in the Internet EraProceedings of the International Teletraffic Congress - ITC-I7, volume 4 of Teletraffic Science and Engineering, Elsevier, (2001)DOI: http://dx.doi.org/10.1016/S1388-3437(01)80135-9
Abstract
Asymmetric Digital Subseriber Line (ADSL) is one of the leading technologies to enable the convergence of voice and data in the last mile. Much effort has been put into the development of voice over \DSL\ (VoDSL) solutions that efficiently harness the bandwidth available in existing copper infrastructure in the local loop for the transmission of high-speed data as well as multiple voice calls. In this paper, we address the different VoDSL architectures that are being considered. We then present simulation results pertaining to acknowledgment filtering and regeneration, which have the potential to significantly improve data throughput over asymmetric links. Finally, we argue for queuing and scheduling mechanisms to separate data from acknowledgement traffic; our preliminary results show that service differentiation is key in obtaining good \TCP\ performance in the presence of bidirectional data traffic over ADSL. This may lead to a hierarchical scheduling scheme when voice traffic is added to the mix.