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Multicast is widely applied for multimedia communications in Internet. The effective multicast routing is the key technology to the communications. The Qos of multi-constrained multicast routing problem deserves more attention. The objective function is to minimize the cost and meet multiple constraints to realize high Qos. The solutions' fitness is obtained by the concentration mechanism of immune...
To control wireless network congestion, an adaptive QoS and wireless bandwidth (adaptive-QWB) was designed in this paper. The adaptive-QWB algorithm seeks an active queue management for the optimal target queue according to the dynamic varying rate of current bandwidth. The experiment results show that the varying-time of adaptive wireless bandwidth and the QoS guaranteed in transmission delay with...
Integrating WLAN technologies and IP TV technologies, we present a IPTV QoS implementing architecture in WLAN environment. By rationally collaborating compression encoding, CDN, multicast, P2P, cache, reshape, etc, under the premise of not obviously degrading picture resolution, it assures end-to-end QoS transport for user IP TV service application. Simulation result verifies its merits in dynamic...
OLT can correctly predict the upper edge and down edge of the packet that reached by DBA GRANT by reshaping all packets arriving and buffed in queues in a cycle during ONU idle time. By adjusting the last GRANT to reach the nearest edge of the packet, all USRs are not only eliminated, but also the whole USR size is reduced, the average cycle length and the average GRANT are kept unchanged, the available...
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