Periodic sending of state information from the receivers to the transmitter to avoid complex error-recovery procedures. Uses a selective repeat retransmission scheme to achieve high throughput. Like XTP, SRM uses request and repair packets, with the addition that in the SRM design, the random delay before sending a request or repair packet is a function of that member's distance in seconds from the node that triggered the request or repair. Overhead in maintaining error recovery related state information. Multicast retransmissions more efficient for clustered repairs.
Processes join a dissemination group for data feed from a single source.
Group participants are organized into domains and represented by domain managers in a tree-based control hierarchy. Flow control is achieved using sliding-window techniques and timeouts. Overhead in dynamically reconfiguring domains may be considerable in fast-changing networks. Flood of control units all over the global network.