Performance Analysis on VoDSL with Splitting Two Sublayers in AAL2

Abstract

This letter mathematically proves that the performance of the new protocol in Ref. [l] is better than that of the existing protocol. It was proposed that a frame from an access device is delivered over the access link and then it is multiplexed and packed into ATM cell at an access node and then the cell is carried toward a voice gateway, by using a method to split two sublayers in AAL2. That means one sublayer is implemented at the subscriber access device and the other sublayer is implemented at the access node. Access devices using the protocol achieve higher utilization of CID and waste fewer ATM resource per the access device. Mathematical analysis is performed on the proposed and existing protocol, and both upstream cell rate and padding probability are calculated. The proposed protocol shows lower upstream traffic rate and padding cell probability than the existing protocol.