Start timer for Packet 11 at the sender side.

Cumulative Ack received for Packets up to and including 11 at the sender side.

Stop timer at the sender side.

Start timer for Packet 12 at the sender side.

Cumulative Ack received for Packets up to and including 12 at the sender side.

Stop timer at the sender side.

Start timer for Packet 13 at the sender side.

Cumulative Ack received for Packets up to and including 13 at the sender side.

Stop timer at the sender side.