NetWare 2018
September 16 - 20, 2018 - Venice, Italy

  • SENSORCOMM 2018, The Twelfth International Conference on Sensor Technologies and Applications
  • SENSORDEVICES 2018, The Ninth International Conference on Sensor Device Technologies and Applications
  • SECURWARE 2018, The Twelfth International Conference on Emerging Security Information, Systems and Technologies
  • AFIN 2018, The Tenth International Conference on Advances in Future Internet
  • CENICS 2018, The Eleventh International Conference on Advances in Circuits, Electronics and Micro-electronics
  • ICQNM 2018, The Twelfth International Conference on Quantum, Nano/Bio, and Micro Technologies
  • FASSI 2018, The Fourth International Conference on Fundamentals and Advances in Software Systems Integration
  • GREEN 2018, The Third International Conference on Green Communications, Computing and Technologies

SoftNet 2018
October 14 - 18, 2018 - Nice, France

  • ICSEA 2018, The Thirteenth International Conference on Software Engineering Advances
  • ICSNC 2018, The Thirteenth International Conference on Systems and Networks Communications
  • CENTRIC 2018, The Eleventh International Conference on Advances in Human-oriented and Personalized Mechanisms, Technologies, and Services
  • VALID 2018, The Tenth International Conference on Advances in System Testing and Validation Lifecycle
  • SIMUL 2018, The Tenth International Conference on Advances in System Simulation
  • SOTICS 2018,The Eighth International Conference on Social Media Technologies, Communication, and Informatics
  • INNOV 2018, The Seventh International Conference on Communications, Computation, Networks and Technologies
  • HEALTHINFO 2018, The Third International Conference on Informatics and Assistive Technologies for Health-Care, Medical Support and Wellbeing

NexTech 2018
November 18 - 22, 2018 - Athens, Greece

  • UBICOMM 2018, The Twelfth International Conference on Mobile Ubiquitous Computing, Systems, Services and Technologies
  • ADVCOMP 2018, The Twelfth International Conference on Advanced Engineering Computing and Applications in Sciences
  • SEMAPRO 2018, The Twelfth International Conference on Advances in Semantic Processing
  • AMBIENT 2018, The Eighth International Conference on Ambient Computing, Applications, Services and Technologies
  • EMERGING 2018, The Tenth International Conference on Emerging Networks and Systems Intelligence
  • DATA ANALYTICS 2018, The Seventh International Conference on Data Analytics
  • GLOBAL HEALTH 2018, The Seventh International Conference on Global Health Challenges
  • CYBER 2018, The Third International Conference on Cyber-Technologies and Cyber-Systems

DigitalWorld 2019
February 24 - 28, 2019 - Athens, Greece

  • ICDS 2019, The Thirteenth International Conference on Digital Society and eGovernments
  • ACHI 2019, The Twelfth International Conference on Advances in Computer-Human Interactions
  • GEOProcessing 2019, The Eleventh International Conference on Advanced Geographic Information Systems, Applications, and Services
  • eTELEMED 2019, The Eleventh International Conference on eHealth, Telemedicine, and Social Medicine
  • eLmL 2019, The Eleventh International Conference on Mobile, Hybrid, and On-line Learning
  • eKNOW 2019, The Eleventh International Conference on Information, Process, and Knowledge Management
  • ALLSENSORS 2019, The Fourth International Conference on Advances in Sensors, Actuators, Metering and Sensing
  • SMART ACCESSIBILITY 2019, The Fourth International Conference on Universal Accessibility in the Internet of Things and Smart Environments

NexComm 2019
March 24 - 28, 2019 - Valencia, Spain

  • ICDT 2019, The Fourteenth International Conference on Digital Telecommunications
  • SPACOMM 2019, The Eleventh International Conference on Advances in Satellite and Space Communications
  • ICN 2019, The Eighteenth International Conference on Networks
  • ICONS 2019, The Fourteenth International Conference on Systems
  • MMEDIA 2019, The Eleventh International Conference on Advances in Multimedia
  • PESARO 2019, The Ninth International Conference on Performance, Safety and Robustness in Complex Systems and Applications
  • CTRQ 2019, The Twelfth International Conference on Communication Theory, Reliability, and Quality of Service
  • ALLDATA 2019, The Fifth International Conference on Big Data, Small Data, Linked Data and Open Data
  • SOFTENG 2019, The Fifth International Conference on Advances and Trends in Software Engineering

ComputationWorld 2019
May 5 - 9, 2019 - Venice, Italy

  • SERVICE COMPUTATION 2019, The Eleventh International Conference on Advanced Service Computing
  • CLOUD COMPUTING 2019, The Tenth International Conference on Cloud Computing, GRIDs, and Virtualization
  • FUTURE COMPUTING 2019, The Eleventh International Conference on Future Computational Technologies and Applications
  • COGNITIVE 2019, The Eleventh International Conference on Advanced Cognitive Technologies and Applications
  • ADAPTIVE 2019, The Eleventh International Conference on Adaptive and Self-Adaptive Systems and Applications
  • CONTENT 2019, The Eleventh International Conference on Creative Content Technologies
  • PATTERNS 2019, The Eleventh International Conference on Pervasive Patterns and Applications
  • COMPUTATION TOOLS 2019, The Tenth International Conference on Computational Logics, Algebras, Programming, Tools, and Benchmarking
  • BUSTECH 2019, The Ninth International Conference on Business Intelligence and Technology

InfoSys 2019
June 2 - 6, 2019 - Athens, Greece

  • ICNS 2019, The Fiteenth International Conference on Networking and Services
  • ICAS 2019, The FIfteenth International Conference on Autonomic and Autonomous Systems
  • ENERGY 2019, The Ninth International Conference on Smart Grids, Green Communications and IT Energy-aware Technologies
  • WEB 2019, The Sseventh International Conference on Building and Exploring Web Based Environments
  • DBKDA 2019, The Eleventh International Conference on Advances in Databases, Knowledge, and Data Applications
  • SIGNAL 2019, The Fourth International Conference on Advances in Signal, Image and Video Processing
  • BIOTECHNO 2019, The Eleventh International Conference on Bioinformatics, Biocomputational Systems and Biotechnologies

(to be completed)

 


ThinkMind // ICN 2011, The Tenth International Conference on Networks // View article icn_2011_14_20_10109


By Use of Frequency Diversity and High Priority in Wireless Packet Retransmissions

Authors:
Xiaoyan Liu
Huiling Zhu

Keywords: Orthogonal frequency division multiple access (OFDMA), real-time transmission, resource allocation, retransmission techniques, maximal ratio combining (MRC)

Abstract:
In orthogonal frequency division multiple access (OFDMA) systems, the delay of packets has a great impact on quality of service (QoS), especially for real-time transmission. The basic concept of resource allocation in an OFDMA system is to allocate a subcarrier to the user with the best channel condition in that subcarrier. However, when a retransmission technique is used, the packet delay of successfully transmitting failed packets may be quite large in conventional retransmission schemes. In this paper, the packet combining technique in the downlink OFDMA system is introduced in conjunction with frequency diversity to enhance the reliability of retransmissions and thus reduce the large time delay caused by retransmissions. The novel retransmission technique aims to reduce the maximum number of retransmissions for failed packets, while maximizing the throughput. Bit error rate (BER) and transmit power are constraints in the throughput maximization formulation. A suboptimal algorithm is proposed, in which the retransmitted packets have higher priorities to be given resources than new packets. At the receiver, failed and retransmitted packets are combined before detection by using maximal ratio combining (MRC). It is shown that the proposed retransmission scheme can reduce the maximum packet delay significantly, while maintaining the maximum throughput of the conventional retransmission schemes.

Pages: 291 to 296

Copyright: Copyright (c) IARIA, 2011

Publication date: January 23, 2011

Published in: conference

ISSN: 2308-4413

ISBN: 978-1-61208-113-7

Location: St. Maarten, The Netherlands Antilles

Dates: from January 23, 2011 to January 28, 2011

SERVICES CONTACT
2010 - 2017 © ThinkMind. All rights reserved.
Read Terms of Service and Privacy Policy.