Transcoding Load Distribution Policy for Wireless Mobile Clients

Dongmahn Seo, Heonguil Lee, and Inbum Jung “Transcoding Load Distribution Policy for Wireless Mobile Clients”, The proceeding of the 2008 International Conference on Computer Design (CDES'08), Aug. 2008.

Abstract.

  Recent advancement in wireless network technologies has enabled the streaming media service on the mobil devices such as PDAs and cellular phones. Since the wireless network has low bandwidth channels and mobile devices are actually composed of limited hardware specifications, transcoding technologies are needed to adapt a streaming media to given mobile devices. However, the ceasing and jittering phenomena deteriorate the quality of streaming media service. To avoid this problem, original MPEG media should be transcoded and transmitted to clients in the range of limited times. In particular, when large scale mobile clients demand streaming services, the load distribution policies among transcoding servers highly impact on the total number of QoS streams. In this paper, the resource weighted load distribution policy is proposed for the fair load balancing and the more scalable pperformance in cluster-based transcoding servers. Our proposed policy is based on both the weight of resources consumed for transcoding to classified client grades and the maximum number of QoS streams actually measured in transcoding servers. The proposed policy is implemented on cluster-based transcoding system. In experiments, this policy shows the fair load distribution and scalable performance according to the increase of transcoding servers.