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时间:2010-07-21 22:59来源:蓝天飞行翻译 作者:admin
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(5.2.5.1 -4.2)) as follows:
5.2.5.2.5.1.3 MSPpacket type (MP). This field shall be
set to 1. Fields shown in the packet format and not specified in the
following paragraphs shall be set as specified in 5.2.5.2.1,
5.2.5.2.5.1.4 Supervisory packet (SP). This field shall be 5.2.5.2.2 and 5.2.5.2.5.
set to I .
5.2.5.2.6.1.2 Data packet Qpe (DP). This field shall be
5.2.5.2.5.1.5 Supervisory type (ST). This field shall be Set Oset
to 2.
5.2.5.2.5.1.6 Address, ground or address, mbile. The
AG and AM values in the originating Mode S CALL
REQUEST by ADLP or CALL REQUEST by GDLP packets
shall be returned in these fields. When present, DTE addresses
in the IS0 8208 CLEAR REQUEST packet shall be ignored.
5.2.5.2.5.1 -7 Clearing cause (CC) and diagnostic code
(DC) jields. These fields shall be transferred without modification
from the IS0 8208 packet to the Made S packet when
the DTE has initiated the clear procedure. If the XDLP has
initiated the clear procedure, the clearing cause field and
diagnostic field shall be as defined in the statc tables for the
DCE and XDCE (see also 5.2.6.3.3). The coding and
definition of these fields shall be as specified in IS0 8208.
5.2.5.2.6.1.3 MSP packet type (MP). This field shall be
set to 1.
5.2.5.2.6.1.4 Supentisorypacket (SP). This field shall be
set to 1.
5.2.5.2.6.1.5 Supervisory ~ ~(STe). T'his field shall be
set to 2.
5.2.5.2.6.2 Translation into IS0 8208 packets
5.2.5.2.6.2.1 Translation. Reception by the ADLP
reformatting process of a Mode S CLEAR KEQUEST by
GDLP packet (or an S-bit sequence of packets) from the local
Annex 10 - Aeronautical Te2ecommunications
ADCE shall result in the generation of a corresponding IS0
8208 CLEAR REQUEST packet to the local DCE. The translation
from the Mode S packet to the IS0 8208 packet shall be
the inverse of the processing defined in 5.2.5.2.6.1.
5.2.5.2.6.2.2 Called DTE, calling DTE and length$elds.
These fields shall be omitted in the IS0 8208 CLEAR
REQUEST packet.
5.2.5.2.7 DATA
5.2.5.2.7.1 Translation into Mode S packets
5.2.5.2.7.1.1 Translated packet f o m t . Reception by the
XDLP reformatting process of IS0 8208 DATA packet(s)
from the local DCE shall result in the generation of corresponding
Mode S DATA packet(s) as determined by M-bit
processing (5.2.5.1.4.1), as follows:
5.2.5.2.7.1.2 Data packet gpe (DP). This field shall be
set to 1.
5.2.5.2.7.1.3 Mfield (M). A value of 1 shall indicate that
the packet is part of an M-bit sequence with more packers in
the sequence to follow. A value of 0 shall indicate that the
sequence ends with this packet. The appropriate value shall be
placed in thc M-bit field of the Mode S packet.
Note.- See 5.2.5.1.4 and IS0 8208 for a complete
explanation.
5.2.5.2.7.1,4 Sequence number (SN). The sequence
number field shall be set as specified in 5.2.5.2.1.1.7.
5.2.5.2.7.1.5 Packet send sequerrce number (PS). The
packet send sequence number field shall be set as specified in
5.2.6.4.4.
5.2.5.2.7.1 -6 Packet receive sequence number (PR). The
packet receive sequence numbcr field shall be set as specified
in 5.2.6.4.4.
5.2.5.2.7.1.7 Channel number (CH). The channel
number field shall contain the Mode S channel number that
corresponds to the incoming IS0 8208 DATA packet channel
number.
5.2.5.2.7.1.8 User data length (LV). This field shall
indicate the number of full bytes used in the last SLM or ELM
segment as defined in 5.2.2.3.1.
5.2.5.2.7.1.9 Fill (FILL]). This field shall be set as
specified in 5.2.5.2.1.1.11.
5.2.5.2.7.1.10 User data (UD). The user data shall be
transferred from the IS0 8208 packet to the Mode S packet
utilizing the M-bit packet assembly processing as required.
5.2.5.2.7.2 Translation into IS0 8208packets. Reception
by the XDEP reformatting process of Mode S DATA packet(s)
from the local XDCE shall result in the generation of corresponding
IS0 $208 DATA packet(s) to the local DCE. The
translation from Mode S packet(s) to the IS0 8208 packet(s)
shall be the inverse of the processing defined in 5.2.5.2.7.1.
5.2.5.2.8 INTERRUPT
5.2.5.2.8.1 Translation into Mode S packets
5.2.5.2.8.1.1 Translatedpacketformat. Reception by the
XDLP reformatting process of an IS0 8208 INTERRUPT
packet from the local DCE shall result in the generation of
corresponding Mode S INTERRUPT packet(s) (as determined
by S-bit processing (5.2.5.1.4.2)) as follows:
Fields shown in the packet format and not specified in the
following paragraphs shall be set as specified in 5.2.5.2.1.
5.2.5.2.8.1.2 Data packet type (DP). This held shall be
 
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