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Considering a video/audio server deployed on the gateway node of a wireless mesh network, a large amount of clients distributed on various mesh routers may wish to receive multimedia streams from the server simultaneously. A multicast tree would be a suitable mechanism to deliver subscribed streams to all the destinations. For multi-radio and multi-channel wireless networks, however, it is better...
Orthogonal Frequency Division Multiple Access (OFDMA) based cellular network can support diverse requirement of multimedia traffic. OFDMA method using adaptive modulation and coding technique can increase the system capacity many fold. In order to meet dynamic bandwidth requirement in downlink, an efficient resource allocation method called Two Stage Rate Adaptive (TSRA) algorithm is proposed here...
An advanced algorithm for carrier- frequency offset estimation is presented in this paper, which is based on DMB-T. The algorithm utilizes time domain difference by stages. Theoretical analysis and computer simulation prove that the algorithm has better performance than the traditional method and is able to ensure the convergence range and precision of carrier-frequency offset.
Robustness of overlay networks is an importantproperty as well as short delay for real-time media transmission. Unlike previous schemes, which achieve robustness by restoring spanning trees afternodes or links fail, we focus on reducing possible data loss when failure occurs. According to analysis of the relation between tree depth and data loss, we first present a spanning tree which minimizes dataloss...
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