Communication Efficiency of Error Correction Mechanism Based on Retransmissions
نویسنده
چکیده
In this document we analyze efficiency of a communication system that applies the error correction mechanism using retransmissions. Namely, the transmitter sends a block consisting of Nin information and Noh overhead bits, such that Nb = Nin + Noh. No forward error correction coding is applied. The transmission is performed using digital modulation, where R bits are transmitted per each modulation symbol. For example, RBPSK = 1, RQPSK = 2, R16−QAM = 4 and R64−QAM = 6. Therefore the Nb bits are transmitted using a frame consisting of
منابع مشابه
Efficiency of PET and MPEG Encoding for Video Streams: Analytical QoS Evaluations
A promising solution in the transmission of video streams via communication networks is to use forward error control in order to mask some of the transmission errors and data losses at the receiving side. The redundancy required, however, to achieve error correction without retransmissions will consume some transmission capacity of a network, therefore possibly enforcing stronger compression of...
متن کاملPerformance Evaluation of Real-Time Transport with Link-layer Retransmissions in Wired/Wireless Networks
Real-time transport over wired/wireless networks is challenging, since wireless links exhibit distinct characteristics, such as limited bandwidth and high error rates, due to fading or interference. We focus on the efficiency of mechanisms that bind operationally wired and wireless links. In this context, local error control is attractive, due to the remarkable feasibility of wireless link prot...
متن کاملERROR CONTROLS FOR BROADCAST COMMUNICATION SYSTEMS: AN INTEGER PROGRAMMING APPROACH TO UEP CODING SCHEME AND A DETERMINISTIC APPROACH TO NETWORK CODING by
ERROR CONTROLS FOR BROADCAST COMMUNICATION SYSTEMS: AN INTEGER PROGRAMMING APPROACH TO UEP CODING SCHEME AND A DETERMINISTIC APPROACH TO NETWORK CODING Wook Jung, PhD George Mason University, 2015 Dissertation Director: Dr. Shih-Chun Chang Traditional network protocols employ error control techniques for reliable information dissemination over noisy communication channels. In this dissertation,...
متن کاملEfficient Forward Error Correction for Reliable Transmission in Packet Networks
This paper proposes an approach that utilizes a new forward error correction mechanism for reconstructing lost or corrupted packets sent over a Network. Instead of retransmissions of lost or corrupted packets, the new approach depends on sending extra packets with each group of packets in order to reconstruct lost or corrupted packets. This approach is based on applying a high-performance irreg...
متن کاملA comparative study of packet combining based error recovery schemes for wireless networks
To provide reliable communications in wireless environments, two fundamental error control mechanisms, automatic repeat request (ARQ) and forward error correction (FEC) are proposed. However, the ARQ mechanism may suffer frequent retransmissions and the FEC mechanism incurs bandwidth overhead. To reduce the number of retransmissions and support efficient correction, previous studies have propos...
متن کامل