A robust and efficient mechanism for constructing multicast acknowledgment trees

Kurt Rothermel & Christian Maihöfer
A great variety of todays networked applications require a reliable multicast service. A number of the proposed reliable multicast protocols use a positive acknowledgment scheme, which returns ACKs to the sender to confirm correct delivery. To avoid the well-known implosion problem in the case of large receiver groups, often a tree-based approach is used, i.e., receivers are organized in a tree and ACK messages are passed along the edges of this so-called ACK tree. For...
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