دانلود مقاله Path Diversity with Forward Error Correction (PDF) System for Packet Switched Networks

Path Diversity with Forward Error Correction (PDF) System for Packet Switched Networks
Thinh Nguyen and Avideh Zakhor
Department of Electrical Engineering and Computer Sciences
University of California, Berkeley, CA 94720
{thinhq, avz}@eecs.berkeley.edu

Abstract—Packet loss and end-to-end delay limit delay sensitive
applications over the best effort packet switched networks such as
the Internet. In our previous work, we have shown that substantial
reduction in packet loss can be achieved by sending packets at
appropriate sending rates to a receiver from multiple senders,
using disjoint paths, and by protecting packets with forward error
correction. In this paper, we propose a Path Diversity with Forward
error correction (PDF) system for delay sensitive applications over
the Internet in which, disjoint paths from a sender to a receiver are
created using a collection of relay nodes. We propose a scalable,
heuristic scheme for selecting a redundant path between a sender
and a receiver, and show that substantial reduction in packet loss
can be achieved by dividing packets between the default path
and the redundant path. NS simulations are used to verify the
effectiveness of PDF system.

دانلود مقاله An Efficient Forward Error Correction Scheme for Wireless Sensor Network

Title: An Efficient Forward Error Correction Scheme for Wireless Sensor Network

Author(S) :M.P.Singha, Prabhat Kumarb

Journal/Conference Name: OpticalSwitchingandNetworking

 :Volume

Year: 2012

:Issue

Pages: 737 – 742

Abstract
The two basic methods to recover erroneous packets in any network are Automatic Repeat Request (ARQ), and
Forward Error Correction (FEC). The life time of any wireless sensor network depends directly on the efficient use of
its power resources. Power is primarily consumed during wireless transmission and reception. As energy conservation
is a major issue of concern in WSN, repeat transmission is not an option and FEC would be preferred over ARQ. One
such FEC scheme is (16, 8) quasi cyclic code, which can be used to correct up to 2 Bit Errors and to detect 3 Bit
Errors. However, when more than 2 errors occur, retransmission of data is required. In this work, an efficient FEC
scheme for WSN’s has been developed to avoid retransmission which not only saves energy but also extends its
functionality and enables it to handle “BURST ERRORS”. The Proposed Error Correction Scheme is effective for
correcting Burst Errors of even 8 bits.

در صورت بروز مشکل در دانلود مقاله یا سوال با آدرس ایمیل [e-mail] مکاتبه نمایید.

با تشکر