Packet loss detection by timeout impossible

[grandrew]

Packet loss by timeout is currently detected at client side. But at client side it is impossible due to detect a timeout directly as there is no reference information about packet time (which can be inferred by comparing to other channels' data) and no information about how many packets are lost.

Only the sender may precisely calculate amount of lost packets and request retransmission. Need to implement timeout detection at sender side with retransmit packet buffer.

Full solution of this problem will require fixing #51

[grandrew]

Workaround is to drop all packets from buffer: by implementing #34 and #72

[grandrew]

To fully fix this issue a full procedure is required, consisting of:

• eating the CWND at receiver
• notifying the sender of reduced cwnd if can not be eaten
• calculating if the retransmission is possible in time
• doing or not doing the retransmission, notifying the receiver side that it may drop asap

[grandrew]

actually, the timeout by latency detection IS possible - although not a loss detection. And we have the data of what packet was last received. The only thing we can not detect is the actual packets that are lost.

this method may be used to induce the flush.

[grandrew]

solution working

[grandrew]

now it is not a show stopper