Experiments with a Simple File Transfer Protocol for Radio Links using Enhanced Trivial File Transfer Protocol (ETFTP) (RFC1986)
Original Publication Date: 1996-Aug-01
Included in the Prior Art Database: 2000-Sep-13
Internet Society Requests For Comment (RFCs)
W. Polites: AUTHOR [+3]
Status of this Memo
Network Working Group W. Polites
Request for Comments: 1986 W. Wollman
Category: Experimental D. Woo
The MITRE Corporation
U.S. ARMY CECOM
Experiments with a Simple File Transfer Protocol for Radio Links
using Enhanced Trivial File Transfer Protocol (ETFTP)
Status of this Memo
This memo defines an Experimental Protocol for the Internet
community. This memo does not specify an Internet standard of any
kind. Discussion and suggestions for improvement are requested.
Distribution of this memo is unlimited.
1. INTRODUCTION SECTION
This document is a description of the Enhanced Trivial File Transfer
Protocol (ETFTP). This protocol is an experimental implementation of
the NETwork BLock Transfer Protocol (NETBLT), RFC 998 , as a file
transfer application program. It uses the User Datagram Protocol
(UDP), RFC 768 , as its transport layer. The two protocols are
layered to create the ETFTP client server application. The ETFTP
program is named after Trivial File Transfer Protocol (TFTP), RFC
1350 , because the source code from TFTP is used as the building
blocks for the ETFTP program. This implementation also builds on but
differs from the work done by the National Imagery Transmission
Format Standard .
This document is published for discussion and comment on improving
the throughput performance of data transfer utilities over Internet
Protocol (IP) compliant, half duplex, radio networks.
There are many file transfer programs available for computer
networks. Many of these programs are designed for operations through
high-speed, low bit error rate (BER) cabled networks. In tactical
radio networks, traditional file transfer protocols, such as File
Transfer Protocol (FTP) and TFTP, do not always perform well. This is
primarily because tactical half duplex radio networks typically
provide slow-speed, long delay, and high BER communication links.
ETFTP is designed to allow a user to control transmission parameters
to optimize file transfer rates through half-duplex radio links.
The tactical radio network used to test this application was
developed by the Survivable Adaptive Systems (SAS) Advanced
Technology Demonstration (ATD). Part of the SAS ATD program was to
address the problems associated with extending IP networks across
tactical radios. Several tactical radios, such as, SINgle Channel
Ground and Airborne Radio Systems (SINCGARS), Enhanced Position
Location Reporting Systems (EPLRS), Motorola LST-5C, and High
Frequency (HF) radios have been interfaced to the system. This
document will discuss results o...