Subject: [Monami6] Aeronautics community's interest in monami

From: ivancic <[email-masked]>
Date: Tue, 08 Nov 2005 20:06:30 -0500

The aeronautical community definitely wants monami capability.  

Note, the aeronautics communities number 1 concern is safety of flight. 
Thus QoS is EXTREMELY important for safety of flight command and control
information.  The current system require the aeronautics community to
operate in a fully closed system and basically own the infrastructure.  
Nearly all safety of flight information is currently sent over analog
VHF.  There is a movement to Digital VHF radio to save bandwidth.  A
draft paper providing an explanation of the current system and possible
new architecture is available at:
http://roland.grc.nasa.gov/~ivancic/papers_presentations/2006/PID1382-R2.pdf

Some items  I would like to try once code becomes available follow:

Assume 4 available links:
 -  Gate umbilical cord  100 Mbps Ethernet
 -  VHF radio VDL 2 or 3  (VDL = VHF Data Link)
 -  INMARSAT Swift 64 (64 kbps packet or circuit)
 -  Other high rate satellite link (e.g Connexion by Boeing 100 kbps off
aircraft)

Scenario  #1:
Command and control over vhf radio link
   else
       command and control over high-rate link (i.e Connexions by Boeing)
Entertainment over high-rate link (i.e Connexions by Boeing)

Scenario #2:
Command and control over vhf radio link
   else
     command and control over INMARSAT satellite
         else
                 command and control over high-rate link (i.e Connexions
by Boeing)
Entertainment over high-rate link (i.e Connexions by Boeing)

Scenario #3:
Case 1:  At Gate
   Everything over umbilical cord (100 Mbit Ethernet or higher)

Case 2: On tarmac
   Command and control over 802.11 a/b/g
        else
            Command and control over vhf radio link
    Entertainment over high-rate link (i.e Connexions by Boeing)

Case 3: In terminal area (take off and landing)
   Command and control over WiFi 802.16
        else
            Command and control over vhf radio link
    Entertainment over high-rate link (i.e Connexions by Boeing)

Case 4:  Enroute
Command and control over high-rate link (i.e Connexions by Boeing)
   else
       command and control over vhf radio link
            else
                  command and control over INMARSAT satellite
Entertainment over high-rate link (i.e Connexions by Boeing)

The idea here is that during take off and landing, QoS (delay) is most
critical.  Modified WiFi 802.16  may be workable solution to off load
VHF spectrum
and provide necessary QoS - note current 802.16 cannot handle Doppler of
high speed aircraft, thus a new modulation scheme would be necessary.. 
Once enroute, delay is not as critical and
satellite links may be sufficient. 

I suspect the CASE statements in scenario #3  may not be possible, but it
gives a flavor for the type of operations.

-- 
******************************
Will Ivancic

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