1. Jungsik Yoon jsyoon@nm.gist.ac.kr Networked Media Lab Department of Information and Communication Gwangju Institute of Science and Technology (GIST) 2009. 8. 26

2.  MS. 4 th semester  Research area ◦ Segment Scheduling for P2P-based wireless VoD service  Project ◦ MOVi-TV (Sep./2008~Jun./2010)  Segment scheduling  Publications ◦ 1 domestic paper A priority-based segment scheduling in peer-to-peer-based wireless VoD, KSPC 2008

3.  Segment scheduling for MOVi 802.11 DS 802.11 Mobile Networks Downlink P2P link  Goal Support more many users with higher playback continuity  Need to choose  Sender/receiver  Segment  Time  Frequency

4.  MOVi-TV project ◦ Implement multiple contents supporting MOVi  Previous MOVi (ver 1.5) provides single content only  Modified MOVi can play more than 2 contents simultaneously  Because limited WLAN interfaces, it cannot support more VLC players than ones in single content version ◦ Project report for 1 st year  Writing interim project report  Prepared 1 st year presentation  Group-based segment scheduling ◦ Debug previous problem ◦ Proposed method for toy scenario  Make a group with static hop numbers and RSSI value  Sort those groups in order of RBT deviation and segment population  A group, has higher priority, is scheduled at first

5.  MOVi-TV Project ◦ Multiple contents  Demonstration for 1 st year project presentation  Need to be stabilized in multi-ch. Mode  Generalized multiple content distribution problem  paper work ◦ 1 st year report  Research ◦ Using FEC  Transmit unit is a block, a fragmentation of segment (does not use encoding/decoding)  In P2P connection, packet loss sometimes happen (more than 5%)  From NASTE+ library, FEC can be adapted in MOVi ◦ Group-based scheduling  Find out physical meaning of control parameters  Do paper work