Unreliable sequenced delivery

[nxrighthere]

Unreliable sequenced delivery

[nxrighthere]

What exactly are the proposed semantics?

A guarantee that no message with a higher sequence number will be delivered before a message with a lower sequence number, thus ensuring messages are delivered exactly in the order they are sent. Simply discard the lower sequence number message if a message with a higher sequence number has already been delivered.

What constraints are placed on allowed delivery sequences with this type of message and ordinary unreliable and reliable messages?

Kind of head-of-line blocking, but it can be solved by implementing the independently sequenced channels that are logically separated from each other (see SCTP or ENet). Channels not tied on any delivery type, delivery is specified per message basis, so channels reduce latency and ordering restrictions.

[zpostfacto]

What exactly are the proposed semantics? What constraints are placed on allowed delivery sequences with this type of message and ordinary unreliable and reliable messages?