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2009 Summer Start-up PLAN Jungsik Yoon [email protected] Networked Media Lab Department of Information and Communication Gwangju Institute of Science and Technology (GIST) 2009. 6. 29 [startup seminar]

2009 Summer Start-up PLAN

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[startup seminar ]. 2009 Summer Start-up PLAN. Jungsik Yoon [email protected] Networked Media Lab Department of Information and Communication Gwangju Institute of Science and Technology (GIST) 2009. 6. 29. Status Review. MS. 3 rd semester Research area - PowerPoint PPT Presentation

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Page 1: 2009 Summer  Start-up  PLAN

2009 Summer Start-up PLANJungsik Yoon

[email protected]

Networked Media LabDepartment of Information and Communication

Gwangju Institute of Science and Technology (GIST)2009. 6. 29

[startup seminar]

Page 2: 2009 Summer  Start-up  PLAN

MS. 3rd semester Research area◦ Segment Scheduling for P2P-based wireless VoD service

Project◦ MOVi-TV (Sep./2008~Jun./2010)

Segment scheduling Openmoko (porting on handheld device)

Publications◦ 1 domestic paper

A priority-based segment scheduling in peer-to-peer-based wireless VoD, KSPC 2008

Graduation◦ 2010. 2 / 2010.8 (if postponed)◦ Adaptation of FEC to MOVi and Enhance Segment Scheduler

Status Review

Page 3: 2009 Summer  Start-up  PLAN

Segment scheduling for MOVi

Research Overview

802.11 DS

802.11Mobile Networks

Downlink

P2P link

GoalProvide more many users with good playback quality

Scheduling Sender/receiver Segment Time Frequency

Page 4: 2009 Summer  Start-up  PLAN

Adaptation of FEC (Forward Error Correction)◦ Transmit unit is a block, a fragmentation of segment

(does not use encoding/decoding)◦ In wireless network, packet loss rate is quiet high◦ In order to transmit reliably, adapt FEC algorithm for MOVi◦ Two candidates

Network Coding Digital Fountain Approach

◦ Select one idea from survey and simple simulation◦ Result should be implementation in Testbed

Group-based segment scheduling ◦ When P2P-connection > Downlink, average performance and scalabil-

ity of MOVi is increased◦ To increase P2P-connection, make a group of nodes then one node can

transmit using localized broadcast◦ This idea also need packet encoding/decoding

Work to do

Page 5: 2009 Summer  Start-up  PLAN

Expected Output◦ FEC adapted MOVi system (Implementation)◦ Group-based segment scheduler

(Simulation Implementation)◦ Paper work (if possible)

Plan

Schedule