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value received from the AES management in the channel
status report LDU. The adjustment EIKP shall be required to
maintain a BER of no more than 10".
4.10.4.4.3.2.2 For the from-aircraft C channel, the GES
management shall determine the AES EIRP adjustment
required to maintain a BER of no more than lm3 based on the
BER value measured at the GES. The adjustment shall be sent
to the AES management in the channel status report EIDU.
4.10.4.4.4 CHANNEFLR EQUENCY MANAGEMENT
viously assigned to the AES by initiating channel reassignment
procedure as described in 4.10.4.3.6 and sending the newly
assigned frequencies in the P/R channel control LIDUs following
the log-on confirm LIDU.
4.10.4.4.4.2.2 For the T channel, the GES management
shall adjust the T channel frequencies by initiating channel
reassignment procedure and transmitting the T channel control
LJDU, following the log-on anfirm ELDU, to the AES.
4.10.4.4.5 CHANNEILNT ERFERENCE
MANAGEMENT
The GES management shall maintain one or more reserve
frequencies for each GES in each beam it supports to be used
as P,,, channel and as kmc,h annel frequencies, in the event
of interference to the previously assigned P,,, channel and R,,,
channel frequencies. In the event that changeover is required,
the GES management shall update the system table
accordingly.
4.1 0.4.4.6 PRE-EMPTION MANAGEMENT
4.10.4.4.6.1 Voice versus voice pre-emption
After the circuit-mode services in the GES transmits a
C channel assignment LIDU to the AES, the GES management
shall immediately make available a channel unit serving
the lowest precedence call for the new call, when no channel
units are available, and indicate the availability of the: chamel
unit to the circuit-mode services in the GES.
4.10.4.4.4.1 AESfrequency setting
4.10.4.4.6.2 Data versus voice pre-emption
Note.- Prior to log-on, the AES will use the R,, channel
frequency from the system table to send the log-on request
LIDU to the GES management.
4.10.4.4.4.1.1 For the P, R and T channels, the GES
management shall assign the initial P, R and T channel
frequencies to the AES (if the P,IR,frequency is different from
the PsmAmcfr equencies) by sending P/R channel control
LIDU and T channel control LIDU to the AES after the log-on
confirm LDU in response to the received log-on request
LIDU.
4.10.4.4.4.1.2 For a C channel, the GES management
shall assign the AES C channel transmitlreceive frequency by
passing the assigned frequencies to the AES in the C channel
assignment LIDU transmitted by the circuit-mode services in
the GES.
The GES shall have the capability to reassign spectrum and
power resources from circuit-mode services to packet-mode
services in order to meet packet data service requirements.
4.10.4.5 GES SYSTEM BROADCAST
4.10.4.5.1 The GES management shall transmit the
system table and time data to the AES in order to maintain the
currency of the data and time in the AES.
4.10.4.5.2.1 The GES management shall transmit the
system table data to the AES by means of one or more of the
following broadcast LIDUs:
4.10.4.4.4.2 AES channel frequency reassignment
a) broadcast index;
4.10.4.4.4.2.1 For the P and R channels, the GES
management shall adjust the P/R channel frequencies pre- b) GES P/R channel advice;
Annex 10 - Aeronautical Telecommunicatiolrs Volume ZZZ
c) satellite identification and beam identification channel
advice;
d) GES beam support advice.
4.10.4.5.2.2 The system table data shall be transmitted
in the following two forms:
a) partial sequence containing the most recent updates;
and
b) complete sequence containing the full initial search
and regional data update.
4.10.4.5.2.3 A partial sequence shall comprise one or
more broadcast LIDUs described in 4.10.4.5.2.1.
4.10.4.5.2.4 The complete sequence shall include all the
broadcast LIDUs in 4.10.4.5.2.1. There shall be a complete
sequence for each beam in the satellite service area supporting
a satelliteheam-identifying P,,, channel.
4.10.4.5.2.5 The partial and complete sequence shall
each include one broadcast index LDU.
Note 1.- The broadcast index LIDU provides an existence
flag for each LIDU in the complete sequence.
Note 2.- The GES P,,, and R,, channel series of the
complete sequence can contain up to 64 LIDUs because of the
size of the "initial sequence number" field in the broadcast
index LIDU. In case more LIDUs are included in the series,
the second series of the GES PSma, nd R,,, channel series is
used.
4.10.4.5.2.6 The GES shall transmit the partial sequence
　
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