Interplanetary Internet Tested In Space
Anonymous Coward writes "After Vint Cerf planned the Interplanetary Internet, there's a press release saying that the Interplanetary Internet is now being tested in space, using the Bundle Protocol developed by the Delay-Tolerant Networking Research Group. There's a conference paper with details on the testing too. These guys were previously the first to test IPv6 in space. Now they've found something with even fewer users than IPv6 to play with!"
This allows for retransmissions from inside the network rather than having to retransmit data from the source, as is the case with TCP.
No, this is not a best-effort protocol. Retransmission is required as in TCP, except in this case intermediary nodes along the route can take responsibility for retransmission of packets, whereas in TCP the source of the packet must carry out this role.