KTH MSc Thesis Progress Presentation

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KTH MSc ThesisProgress Presentation

• Design and simulation of relay protocol for
  multi-rate networks
• Bilge Cetin

Design and Simulation of relay protocol
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Outline

• Introduction
• Timeplan
• Background
• Simulation environment
• Documents

Design and Simulation of relay protocol
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Introduction

• Kickoff 4th October 2005
• At Computer and Network Architectures laboratory,
  SICS.
• Supervisors
• Laura Marie Feeney _at_ Sics
• Johan Montelius _at_ KTH
• Webpage http//www.sics.se/bilge/
• Previous research Analysis and protocol design
  for rate adaptation for simple relay networks.
• Credits Laura Marie Feeney, Daniel Hollos,
  Holger Karl, Martin Kubisch, and Seble Mengesha.

Design and Simulation of relay protocol
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Timeplan
Pre-study
Implementation
Enhancements
Design and Simulation of relay protocol
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Background
- The underlying motivation is not just to
enhance the bit rate of one or more nodes but the
overall performance of the cell.
Basic idea of relaying
Design and Simulation of relay protocol
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Background

• 802.11 MAC
• Gives equal chance to access the medium to each
  station

• 802.11 MAC
• Gives equal chance to access the medium to each
  station
• Every station is supposed to have the same
  throughput
• Relay
• Help others to improve your bitrate!

Design and Simulation of relay protocol
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Background
One AP, four 2Mbps stations
-Throughput 1.8 Mbps
One AP, four 11Mbps stations
-Throughput 7.2 Mbps
One AP, two 2Mbps and two 11Mbps Stations
-Throughput 2.9 Mbps
-Any guess!!!
-How about relaying??
Design and Simulation of relay protocol
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Background
One AP, two 5.5Mbps and two 11Mbps Stations
Throughput 5.4 Mbps
How about relay protocol overhead???
Design and Simulation of relay protocol
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Background
Backoff
Design and Simulation of relay protocol
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Gain
Design and Simulation of relay protocol
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Gain
Assumptions - No BER - ProbFGR1
- MPDU size11000bits (1375 Byte) -
BACKOFF1240µsec - Relay BACKOFF 300µsec
Design and Simulation of relay protocol
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Simulation Environment

• OMNET
• Initiated at Technical University of Budapest
• Credits András Varga
• Mobility Framework
• Credits Holger Karl, Marc Löbbers, Daniel
  Willkomm, Andreas Koepke
• 802.11b module
• Credits Marc Löbbers, David Raguin

Design and Simulation of relay protocol
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Documents

• Proposal
• Simulation Environment
• Simple relay protocol design

Design and Simulation of relay protocol