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http://dx.doi.org/10.3745/KIPSTC.2006.13C.2.241

Adaptive Error Control Scheme for Supporting Multimedia Services on Mobile Computing Environment  

Jeon Yong-Hun (중앙대학교 컴퓨터공학부)
Kim Sung-Jo (중앙대학교 컴퓨터공학부)
Publication Information
The KIPS Transactions:PartC / v.13C, no.2, 2006 , pp. 241-248 More about this Journal
Abstract
Mobile computing has such characteristics as portability, wireless network, mobility, etc. These characteristics cause various problems to mobile terminals like frequent disconnection, high error rate, and varying network status. These problems motivate us to develop an adaptive error control mechanism for supporting multimedia service in mobile computing environment. In this paper, we propose the Adaptive Error Control(AEC) scheme using client's buffer size and current error rate. After categorizing the status into four groups according to client's buffer size and current error rate, this scheme applies an appropriate error control scheme to each status. In this scheme, thresholds of buffer size and error rate are determined by the data transmission time, play rate and average VOP size, and by the probability of error for a sequence of packets. The performance of proposed scheme is evaluated by flaying MPEG-4 files on an experimental client/server environment, respectively. The results show that error correcting rate is similar to other schemes while the time for correcting error reduce a little. In addition, the size of data for correcting error is decreased by 23% compared with FEC and Hybrid FEC, respectively. Theses results demonstrate that the proposed scheme is more suitable in mobile computing environment with small bandwidth and varying environment than existing schemes.
Keywords
Mobile Computing; Multimedia Service; Error Contro;
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