Previous Works Motivation 上游充通大 The essential difference between multicast and unicast SHANGHAI JIAO TONG UNIVERSITY The flow aggregation in multicast case (multiple flows with different destinations can be aggregated,and therefore only one flow is enough) Number of flows multi-unicast multicast > Due to the flow aggregation,the number of flows is reduced (11-5 in this example)by the multicast scheduling comparing with the multi-unicast case. 5Previous Works & Motivation The essential difference between multicast and unicast ➢ The flow aggregation in multicast case (multiple flows with different destinations can be aggregated, and therefore only one flow is enough) ➢ Due to the flow aggregation, the number of flows is reduced (11→5 in this example) by the multicast scheduling comparing with the multi-unicast case. 5 multi-unicast multicast Number of flows