3TP: 3-D Models Transport Protocol

摘要

This paper addresses the problem of streaming progressively compressed 3-D models over lossy networks. Out of all encoded packets that can be transmitted, we intelligently choose a subset of packets to be transmitted using TCP in order to meet a given distortion constraint, while transmitting the remaining packets using UDP to minimize the end-to-end delay. We call this new application-layer protocol 3TP (3-D models transport protocol). In this paper, we mathematically model both the delay and the distortion for a given channel characteristics. Then, we minimize the expected delay for a given distortion upper bound. The proposed protocol results in savings of 39% and 62% in delay time at packet-loss rates of 1% and 14%, respectively, compared to systems that do not optimize transmission according to the encoded bitstream content.