组播的基本概念 Many-to-One Applications Any number of receivers sending data back to a( source)sender via unicast or multicast Resource Discovery: Service Location, for example, leverages ip multicast to enable something like a host anycasting service"Capability. Data Collection: the sensors might send updates in response to a request from the data collector. or send continuously at regular intervals, or send spontaneously when a pre-defined event occurs. Auctions: Theauctioneer"starts the bidding by describing whatever it is for sale (product or service), and receivers send their bids privately or publicly. 东南大学6东南大学 6 Many-to-One Applications One Applications • Any number of receivers sending data back to a (source) sender via unicast or multicast – Resource Discovery: Service Location, for example, leverages IP Multicast to enable something like a "host anycasting service" Capability. – Data Collection: the sensors might send updates in response to a request from the data collector, or send continuously at regular intervals, or send spontaneously when a pre-defined event occurs. – Auctions: The "auctioneer" starts the bidding by describing whatever it is for sale (product or service), and receivers send their bids privately or publicly. 组播的基本概念