[Sls-slp] Rationale for Prox-1 Half-Duplex State Table Change
Greg J Kazz
greg.j.kazz at jpl.nasa.gov
Tue Apr 20 17:00:06 UTC 2004
Last week I emailed to all of you draft Pink sheets on a proposed change to
the Half-duplex state table (Table 6-10, Session Establishment and Data
Services) in the current Proximity-1 Space Link Protocol - Data Link Layer
Blue Book. However, I forgot to provide you the rationale for this change.
Event 39 enables the token to be passed to the partnered transceiver,
enabling it to transmit. One can reach Event 39 by two paths. Either the
send_duration timer has expired, meaning it's time to give up the token,
i.e., the "right to transmit" or the transceiver has (either completely for
the pass or temporarily) run of data to transmit before the timer has
expired. In either case, the test for X=2 is unnecessary in order to
transition from State 50 to State 56.
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