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Load Distribution Method based on Transcoding Time Estimation on Distributed Transcoding Environments  

Kim, Jong-Woo (강원대학교 컴퓨터정보통신공학과)
Seo, Dong-Mahn (KIST 영상미디어센터)
Jung, In-Bum (강원대학교 컴퓨터정보통신공학과)
Publication Information
Journal of KIISE:Computer Systems and Theory / v.37, no.4, 2010 , pp. 195-204 More about this Journal
Abstract
Due to improved wireless communication technologies, it is possible to provide multimedia streaming service for mobile device clients like PDAs and cellphones. Wireless networks are serviced on low bandwidth channels and mobile devices work on limited hardware specifications. In these conditions, transcoding technologies are needed to adapt the media for streaming services to given mobile environments. To transcode from the source media to the target media for corresponding grades, transcoding servers perform transcoding jobs as exhausting their resources. Since various transcoding loads occur according to the target transconding grades, an effective transcoding load balancing policy is required among transcoding servers. In addition to transcoding process, servers should maintain QoS streams for mobile clients for total serviced times. It requires real-time requirements to support QoS for various mobile clients. In this paper, a new transcoding load distribution method is proposed. The proposed method can be driven for fair load balance between distributed transcoding servers. Based on estimated transcoding time, movie information and target transcoding bit-rate, it provides fair transcoding load distribution and also performs admission control to support QoS streams for mobile clients.
Keywords
transcoding; load balance; time estimation; admission control;
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