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request LIDU to the GES (4.9.3.3.3) afer the AES has selected
a satellite, a beam and a GES.
4.10.4.3.2.1 To reject the log-on request of an AES, the
GES management shall reply to the log-on request LDU by
sending a log-on reject LDU to the A3ES indicating he reason
for rejection.
log-on confirm LWU followed by channel control
LIDUs were sent or the missing LDUs indicated in the
log-on acknowledgement LIDU received from the AES
were retransmitted, the GES management shall send
another log-on confirm LIDU followed by the required
channel control LIDUS to the AES. The GES
management shall send the log-on confirm LDU
followed by channel control D U s to the AES every
tG26 seconds until a response is received or the number
of times the log-on confirm LIDU followed by channel
control LIDUs have been sent equals four. If no
response is received within tG26 seconds from the time
the fourth log-on confirm LIDU followed by the channel
control LDUs were sent, the GES management shall
delete the requesting f f i S from its &S log-on status
table and then transmit log-off information to other
GESs in the same satellite service area if the AES is
identified as logged on to this GES in the AES log-on
status table.
b) If a log-on acknowledgement LIDU indicating no error
is received from the AES, the GES management. shall
send a log-on acknowledgement LDU to the AES on
the newly assigned Pd channel. Thereafter, the GES
management shall, each time another log-on
acknowledgement LDU is received from the AES
within tG27 seconds (Appendix 4 to Chapter 4) from the
time the last log-on acknowledgement LIDU was sent to
the AES, send another log-on acknowledgement LIDU
to the AES. The GES management shall repeat the
above procedure until one of the following occurs:
4.10.4.3.2.1 bis The "Reason" code "AES not authorized" 1) no log-on acknowledgement LIDU is received from
(see Appendix 3 to Chapter 4, Irem 44) shall be sent (in the AES within tG27 seconds from the time the last
response to a log-on request LIDU) only to an AES which has log-on acknowledgement LIDU was sent to the AES;
not been authorized to use the satellite system. or
Note.- The 'Q number of the application" parameter in
the log-on request WDU will indicate whether the aircrafr is in
distress or not. The "Q number of application" parameter will
be set to 15 for un aircraft in distress.
4.10.4.3.2.2 To accept the log-on request of an AES, the
GES management shall reply to the log-on request LIDU by
sending a log-on confirm LIDU followed by a P/R channel
control LIDU and a T channel control LIDU to the AES, as
required to assign new Pd, Rd and T channels to the AES.
4.10.4.3.2.3 After transmitting the log-on confirm LIDU
followed by the channel control LIDUs (PIR and T channel
control LIDUs) as indicated in the log-on confirm LIDU to the
AES or after transmitting the missing UDUs identified in the
log-on acknowledgement LIDU received from the AES, the
GES management shall do the following:
a) If no response is received from the AES within tG26
seconds (Appendix 4 to Chapter 4) from the time the
2) an R channel SU that is not a log-on request LIDU
or a log-on acknowledgement LIDU is received from
the AES, after which, the GES management shall.
update its AES log-on status table as specified in
4.10.4.2.3, and send log-on information to the other
GESs in the same satellite service area.
c) If a log-on acknowledgement LIDU identifying the
missing LIDUs is received from the AES, the GES
management shall retransmit the missing LWUs to the
AES and shall proceed as in 4.10.4.3.2.3.
4.10.4.3.2.4 If another log-on request LIDU is received
from the AES before the GES management has finished
responding to the previously received log-on request LIDU,
the GES management shall discard the last received log-on
request LIDU.
2/11/00
No. 7s
Part I Annex 10 - Aeronautical Te~ecornmunications
Note.- An AES log-off may be iniriated by the AES by
sending a log-off requcst LIDU to the GES or by the GES by
sending a log-off requcst LJDU to the AES. The GES initiated
log-of is intended to provide the GES with the capability to
shut down undesired AES transmissions.
4.10.4.3.3.1 Upon receipt of a log-off request LIDU from
an AES, the GES management shall do the following:
a) if the AES is identified as logged on to this GES in the
AES log-on status table, delete the AES from its AES
log-on status table, transmit log-off information to other
GESs in the same satellite service area and then transmit
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