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chmel reassignment LDU to the AES. The GES management
shall then do the following:
a) If no response is received from the AES within tG31
seconds (Appendix 4 to Chapter 4) from the time the
log controvdata channel reassignment LDU was sent
to the AES, the GES management shall send another
log controlldata channel reassignment LIDU to the
AES. If no response is received again within the tG31
seconds, the GES management shall abort the data
channel reassignment procedure.
b) If data channel reassignment reject LJDU is received
from the AES, the GES management shall abort the
data channel reassignment procedure.
c) If a log controuready for assignment LJDU is received
from the AES, the GES management shall transmit a
log-on confirm LIDU followed by a P/R channel
control LIDU and a T channel control LIDIJ, as
required, containing the reassigned channel information
to the AES. The GES management shall then do the
following:
1) If no response is received from the AES within
tG32 seconds (Appendix 4 to Chapter 4) from the
time the log-on confirm LLDU followed by the
channel control LIDUS were sent, the GES
management shall send another log-on confirm
LIDU on the previous P, channel followed by a
P/R channel control and T channel control LIDUs
as appropriate. If no response is received again
within tG32 seconds, the GES management shall
abort the data channel reassignment procedure.
2) If a log-on acknowledgement LIDU indicating no
error is received from the AES on the newly
assigned R,, chamel, the GES management shall
send a log-on acknowledgement LDU to the AES
on the newly assigned P,, channel. The GES
management shall, if another log-on acknowledgement
LIDU is received within tG33 seconds
(Appendix 4 to Chapter 4) from the time the last
log-on acknowledgement LIDU was sent, send
another log-on acknowledgement LIDU to the
AES on the new P, channel. The GES management
shall repeat the above procedure until no
response has been received from the AES within
tG33 seconds from the time the last log-on
acknowledgement was sent by the GES, after
which the GES management shall update the AES
log-on statas table with the new channel freqhencies
assigned to the AES.
3) If a data channel reassignment reject LIDU is
received from the AES, the GES management shall
abort the data channel reassignment procedure.
4.10.4.4 GES CHANNEL MANAGEMENT
4.10.4.4.1 The GES channel management shall control
the AESIGES channel configuration, channel power and
channel frequency.
4.10.4.4.2.1 GES channel configuration
for ntanugement communication
For each beam supported by a satellite, each GES supporting
the beam shall provide:
a) at least one transmit P,, channel, and
b) at least four receive R,,, channels
for management communications.
4.10.4.4.2.2 AES channel configuration
assignment and adjustment
4.10.4.4.2.2.1 During log-on, the GES management shall
assign a P, channel to an AES in a manner which ensures that
the performance requirements in 4.7 and 4.8 are met.
4.10.4.4.2.2.2 During log-on, the GES management shall
assign a group of R channels and one or more T channels to
an AES, in a manner which ensures that the performance
requirements in 4.7 and 4.8 are met.
4.10.4.4.2.2.3 For the C channel(s), the GES rnanagement
shall assign C channel(s) on a per-call basis.
4.10.4.4.2.2.4 After log-on, the GES management shall
adjust an AES channel configuration, if required, by initiating
channel reassignment as described in 4.10.4.3.6.
4.10.4.4.3.1 AES power setting
Note.- Prior to log-on, the AES will use its default power
setting to transmit the log-on request LlDU to the GES
management.
Part 1 Annex I0 - Aeronautical Telecommunications
4.10.4.4.3.1.1 For the R and T channels, during the logon
process the GES management shall assign an initial power
setting to the AES as the "initial EIRP" value in the log-on
confirm LIDU sent to the AES. The initial EIRP value shall
be determined so that the estimated bit error rate at the GES
shall not exceed lo-'.
Note.- The AES will adjust its channel unit power levels
according to the EIRP value received in the log-on confirm
LIDU.
4.10.4.4.3.1.2 For the C channel, the initial EIRP value
shall be assigned by the GES management on a per-call basis
and shall be sent to the AES via the circuit-mode services in
the C channel assignment LIDU.
4.10.4.4.3.2 C channel power adjustment
4.10.4.4.3.2.1 For the to-aircraft C channel, the GES
management shall adjust the GES EIRP according to the BER
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