tree def422bd8653ce3f623457b91a0691f39f68c6c9
parent 510d7d36ed1a040679f371976fa2c326c4b478bf
author Daniel Willmann <dwillmann@sysmocom.de> 1408976423 +0200
committer Daniel Willmann <daniel@totalueberwachung.de> 1410369598 +0200

tbf: Handle DL ACK/NACK poll timeout correctly

If the PCU didn't receive the downlink ack/nack when it was polled there
is no reason to assume it will arrive at a later time. In that case
N3105 is already increased, but the next block sent should have a valid
RRBP set as well to poll again.
This can happen if either the BSN with the valid RRBP gets lost on the
downlink or the DL ACK/NACK gets lost on the uplink path.

Ticket: SYS#382
Sponsored-by: On-Waves ehf