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Well managed IP multicasting e e e 2. Protect content from illicit access 1. Accurate tracking (accounting) of Join/Leave by user, by group Move With device 4. End user should be able to access CDN from anywhere Illegal user User may move and change devices. e Advanced multicast CDN Content key Shared Media 3. Support preview to each group (Content) router Edge node 5. Content key should be delivered to cover each user receiving period. Charging should be based on user reception, not on key holding period Content server 6. Shorten the time from order to service provision. Service provision on-demand is one of the goals of service providers. |