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Pd channel followed by a P/R channel control and T
channel control LZDUs 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
Rd channel, the GES management shall send a log-on
acknowledgen~ent LIDU to the AES on the newly
assigned Pd channel. The GES management shall, if
another log-on acknowledgement LDU 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 LTDU to
the AES on the new Pd channel. The GES
management shall repeat the above procedure until
no response has been received from the AES wilhin
tG33 seconds from the time the last log-on
acknowledgement was sent by the GES, after which
the GES management shall update the M S log-on
status table with the new channel frequencies
assigned to the AES.
3) If a data channel reassignment reject LlDU 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 AESJGES channcI configuration, channel power and
channel frequency.
4.10.4.4.2 CHANNEL CONFIGURATION MWAGEMENT
4.10.4.4.2.1 GES chanriel con$guration for management
cornrnunicati~n
For each GES, the following channels shall be provided for
system management communications:
a) at least one transmit P,,, channel, and
b) at least four receive R,,, channels.
4.10.4.4.2.2.2 During log-on, the GES management shall
assign a group of R channels and one, or more T channels to
an AES, in a manner which ensures that the performance
requirements in 4.7 and 4.8 are met.
4.10.4.4.2.2.3 For the C channel(s), the GES management
shall assign C channel(s) on a per-call basis.
4.10.4.4.2.2.4 After log-on, the GES management shall
adjust an AES channel configuration, if required, by initiating
channel reassignment as described in 4.10.4.3.6.
4.10.4.4.2.2.5 The GES or its system management shall
ensure that no frequencies are assigned to an AES that could
generate intermodulation products that produce harmful
interference to on-aircraft satellite navigation receiver
operations.
4.10.4.4.3 CHANNEL POWER MANAGEMENT
4.10.4.4.3.1 AES power setting
Note.-- Prior to log-on, the AES will use its default power
setting to transmit the log-on request LIDU to the GES
management.
4.10.4.4.3.1.1 For the R and T channels, during the log-on
process die GES management shalI assign an initial power
setting to the AES as the "initial EIRP" value in the log-on
confirm LIDU sent to the MS. The initial E m value shall be
determined so that the estimated bit error rate at the GES shall
not exceed 10".
4.1 0.4.4.3.1.1 bis. Recommendation.- For increased
power management ejiciency, the R and T channel EIRPs
should be determined fmm the data EIRP broadcast UDUs
(Figure A2-61)for both global and spot beam channels. For a
global beam channel, the most significant bit of the channel
frequency shall be set to "0" (zero). For a spot beam channel,
the most sign$cant bit of the channel frequency shall be set to
"1 " (one).
Note.- The AES will adjust its charmel unit power levels
according to the EIRP value received in either the log-on
confirm LJDU or the data EIRP broadcast LIDUS.
4.10.4.4.3.1.2 For the C channel, the initial E m 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.
-uiimo No. 75
Part I Annex 10 - Aeronautical Telecommunications
.10.4.4.3.2 C channel power adjustment of interference to the previously assigned P,,, channel and
R,, channel frequencies. In the event that changeover is
4.10.4.4.3.2.1 For the to-aircraft C channel, the GES required, the GES management shall update the system table
management shall adjust the GES EIW according to the BER accordingly.
value received from the AES management in the channel status
report LIDU. The adjustment EIRP shall be required to
maintain a BER of no more than 4.10.4.4.6 PRE-EMPTION MAIVAGEMENT
4.10.4.4.3.2.2 For the from-aircraft C channel, the GES 4.10.4.4.6.1 voice versus voice pre-gmption
management shall determine the AES E m adjustment
required to maintain a BER of no more than based on the After the circuit-mode services in the GES transmits a C
BER value measured at the GES. The adjustment shall be sent channel assignment L ~ toU the AES, the GES management
　
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