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d) log-on GES ID.
4.10.4.2.3.3 For each AES logged-on to the GES, the
AES log-on status table at the GES shall contain the following
information in addition to the information specified in
4.10.4.2.3.2:
a) P channel frequency assigned to the AES;
b) R channel frequencies assigned to the AES:
c) T channel frequencies assigned to the AES;
d) channel rate capabilities of P, R, T and C channels;
e) AES activity indicator (active or inactive).
4.10.4.2.3.4 AES log-on status
table update
The GES shall update the AES log-on status table when an
AES logs on (initial or renewal) or logs off from this GES or
when the GES receives log-on or log-off information corresponding
to an AES from another GES.
4.10.4.3 GES LOG STATUS
MANAGEMENT
4.10.4.3.1 The GES log status management function
shall manage the AES log-onflog-off, verify the activity of
each of its log-on AESs, renew the log-on (when required),
and reassign data channels to the AESs (when required).
Note.- The AES initiates a log-on by sending a log-on
request LlDU to the GES (4.9.3.3.3) after the AES has
selected a satelliie, 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 LIDU by
sending a log-on reject LIDU to the AES indicating the reason
for rejection. The GES shall always accept the log-on request
of an AES indicating that the AES is in distress.
Note.- Several rejection reasons have been identijed for
art AES log-on request. Refer to Appendix 3 to Chapter 4, Item
44 "Reason" for the listing of the identijied rejection reasons
a d their corresponding codes. The "Reason" is afield of the
log-on reject LIDU.
Note.- The "Q number of the application" parameter in
the log-on request LIDU will indicate whether the aircraft is
in distress or not. The "Q number of application" parameter
will be set to I5 for an 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 P,, R,, 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 (P/R and T channel
control LXDUs) as indicated in the log-on confirm LIDU to the
AES or after transmitting the missing LIDUS 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
log-on confirm LIDU followed by channel control
LIDUs were sent ox the missing LIDUs 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 LDUs to the AES. The GES
management shall send the log-on confirm LIDU
followed by channel control LIDUs 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 LDUs 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 LIDUs were sent, the GES management
shall delete the requesting AES from its AES
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
i s received from the AES, the GES management shall
send a log-on acknowledgement LIDU to the AES on
the newly assigned P, channel. Thereafter, the GES
management shall, each time another log-on
acknowledgement LIDU 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
LLDU to the AES. The GES management shall
repeat the above procedure until one of the following
occurs:
1) no log-on acknowledgement LIDU is received
from the AES within tG27 seconds from the time
the last log-on acknowledgement LIDU was sent
to the AES; or
Part I Annex 10 - Aeronautical Telecommunications
2) an R channel SU that is not a log-on request LIDU
or a log-on acknowledgement LLDU is received
from the AES, after which, the GES management
　
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