Title :
Proactive Reed-Solomon bypass (PRSB): a technique for real-time multimedia processing in 3G cellular broadcast networks
Author :
Cho, Yongwoo ; Kang, Kyungtae ; Lee, Joonho ; Shin, Heonshik
Author_Institution :
Sch. of Electr. Eng. & Comput. Sci., Seoul Nat. Univ., South Korea
Abstract :
We analyze the execution time of MAC-layer Reed-Solomon error recovery in cdma2000 1xEV-DO broadcast and multicast services (BCMCS), with respect to cache size and air channel condition. We observe that a deteriorating channel condition often causes an intolerable delay for real-time tasks because of the error recovery process, even when sufficient cache memory is available to increase CPU throughput. To overcome this problem, we propose proactive Reed-Solomon bypass (PRSB), which determines whether the Reed-Solomon scheme should be used to correct errors in the real-time communication environment. The proposed scheme utilizes the cache effectively, thus preventing reset of the entire decoding process and allowing real-time multimedia applications to meet their deadline constraints. Simulation results show that the PRSB greatly improves the overall playback quality of a video.
Keywords :
3G mobile communication; Reed-Solomon codes; cellular radio; multicast communication; multimedia communication; real-time systems; 3G cellular broadcast networks; MAC-layer Reed-Solomon error recovery; cdma2000 1xEV-DO broadcast; multicast services; proactive Reed-Solomon bypass; real-time communication environment; real-time multimedia processing; Cellular networks; Decoding; Delay; Digital multimedia broadcasting; Error correction; Forward error correction; Intelligent networks; Multimedia communication; Reed-Solomon codes; Timing;
Conference_Titel :
Embedded and Real-Time Computing Systems and Applications, 2005. Proceedings. 11th IEEE International Conference on
Print_ISBN :
0-7695-2346-3
DOI :
10.1109/RTCSA.2005.71