TITLE:
Implementation and Evaluation of Transport Layer Protocol Executing Error Correction (ECP)
AUTHORS:
Tomofumi Matsuzawa, Keisuke Shimazu
KEYWORDS:
Component, FEC, Transport Protocol, MTU
JOURNAL NAME:
Communications and Network,
Vol.6 No.3,
August
14,
2014
ABSTRACT: Technologies for
retransmission control and error correction are available for communications
over the Internet to improve reliability of data. For communications that
require the data reliability be ensured, TCP, which performs retransmission
control, is often employed. However, for environments and services where
response confirmation and retransmission are difficult, error correction
technologies are employed. Error correction is generally implemented on UDP,
but the existing framework implemented on UDP frequently does not consider the
maximum frame size of the data link layer and relegates data division to the IP
module. The IP module divides data according to the maximum size for the data
link, and the receiving IP module reconstructs the divided data. For a data
link layer typified by the current Ethernet with an error detection function,
the frame is often destroyed upon error detection. At the IP module, the
specification allows destruction of the entire dataset whenever divided data
necessary for reconstruction is incomplete. Consequently, an error in a single
bit results in a total loss of data handed to the IP module, and thus error
correction performance declines with the increase in data size handed to the IP
module. The present study considers the MTU of the data link layer and proposes
error correction protocol (ECP) over IP, which decreases the transfer data
volume flowing to the data link layer by dividing data into blocks of
appropriate size based on designated error correction code and its parameters
(thus improving error correction performance) and assesses the performance of
ECP. Experimental results demonstrate that performance is comparable or better
than existing error correction frameworks. Results also show that when a
specification not ensuring the reliability of the data link layer was employed,
error correction was superior to existing frameworks on UDP.