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prescribed. SU formars are given in Appendix 2 to Chapter 4.
The information exchanged between the AES management and
the physjcal layer shall include the following:
a) to the physical layer:
1) frequencies for the transmit and receive channel
units;
2) request for assignment of a receive channel unit
and associated Q number, application reference
number, frequency and channel rate;
3) command to randomly select an R channel
frequency.
4.9.3 AES management functions
4.9.3.1 AES management shall carry out the following
functions:
a) U Sta ble management;
b) AES log-status management;
C) AES channel management.
2) channel unit mode selection (R, T or C channel);
3) channel rates;
4) transmitter power settings;
5). channel unit number;
b) from the physical layer:
1) P channel lossldegradation indication;
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2) P channel synchronization indication;
3) estimated bit error rate on each channel unit
receiving a C channel.
4.9.2.1.4 CIRCUIT-MODE SERVICES
The information exchanged between the AES management and
the circuit-mode services shall include the following:
a') to circuit-mode services:
1) log-on status, (i.e. logged onflogged off);
2) log-on GES ID;
3) channel unit number in response to each request
for a channel unit assignment;
b) from circuit-mode services:
1) request for assignment of a transmit channel unit
and associated Q number, application reference
number, frequency, channel rate and initial E m ;
4.9.3.2 AES TABLE MANAGEMENT
4.9.3.2.1 AES management shall maintain the following
two tables:
a) system table;
b) log-on confirm table.
4.9.3.2.2 SYSTEMTA BLE
The content of this table for each beam in a satellite service
area shall be as provided by the GES (see 4.10.4.2.2).
4.9.3.2.3 AES SYSTEM TABLE UPDATE
For updating the contents of the system tables. the AES
management shall use the following procedures:
a) Prior to log-on. Once the AES management receives
a broadcast sequence on a satelliteheam-identifying
P,,, channel frequency, it shall determioe whether the
received sequence is a partial sequence or a. complete
sequence (see 4.10.4.5.2) and then do the following:
1) if it is a partial sequence, the AES management
shall compare the revision number specified in the
received partial sequence with the revision number
of the corresponding current data segment in the
system table. If the received revision number is
one higher than the current number, the AES shall
update its system table according to the received
sequence. If the received revision number differs
Annex 10 - Aeronautical Telecommunications Volume ZZZ
from the current number by more than one, the
AES management shall wait for the following
complete sequence and update its system table
accordingly.
2) if the received sequence is a complete sequence,
the AES shall update its system table accordingly.
b) After log-on. When the AES management receives a
partial sequence from the log-on GES, it shall update
its system table accordingly.
4.9.3.2.4 LOG-ON CONFIRM TABLE
This table shall include the following:
a) satellite ID;
b) beam ID;
c) log-on GES ID;
d) initial EIRP for R channels:
e) P, channel frequency and channel rate;
f) R, channel frequencies and channel rate;
g) T channel frequencies and channel rate;
h) number of C channels supportable by the AES simultaneously
(including a C channel that utilizes a transmitter
that is shared by the C, R and T channels for
Level 3 AES).
4.9.3.2.5 LOG-ONC ONFIRM TABLE UPDATE
The content of the log-on confirm table, except for item h),
shall be updated whenever the AES management logs on,
renews its log-on or completes a data channel reassignment
procedure with the GES (4.9.3.3.4.1 f)).
4.9.3.3 AES LOG-STATUS MANAGEMENT
4.9.3.3.1 Before an AES begins providing user communication
services, the AES management shall successfully
complete the log-on procedure, given in 4.9.3.3.4, with a
selected GES. Prior to initiating the log-on procedure, the AES
management shall select a suitable satellite, beam and GES
combination as specified in 4.9.3.3.2,
4.9.3.3.2 SATELUTE, BEAM AND GES SELECTIONS
The satellite, beam and GES selections shall be made such that
the AES is capable of receiving an adequate signal level on a
P,,, channel of the selected GES. The adequacy of the signal
level shall be based on receiving a P channel synchronization
indication (4.9.2.1.3 b)) from the physical layer. The inforrnation
used to make these selections shall be as specified in the
　
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