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Call redirection
Call redirection notification
Transit delay selection and indication
Calling address extension
Minimum throughput class negotiation 14.3
End-to-end transit delay negotiation 14.4
Expedited data negotiation 14.5
Annex 10 - Aeronautical Telecommunications
FIGURES FOR CHAPTER 6
Figure 6-1. PN-generator for bit scrambling sequence
-.
No. 72
*
T
(1
1 2 3 4 13 14 15
Data in Data out
LF
Legend:
1 clock period delay
initial value
' - -rembusntage
4
module 2 adder (exclusive OR): @
T
(0)
- T . .
(1)-
T *
(0)
T
(0)
T
(1
Annex 10 - Aeronautical Tebcommunications Volume IIZ
* See also 6.5.3.3.3.1.
Note.- IS0 3309 states that a transmitter may include more than one frame in a single physical layer
transmission, with a single flag separaring each frame.
Figure 6-2. Link layer frame format
DESCRIPTION
FLAG
- Destination
- Address
- Field
- Source
- Address
- Field
Link Control Field
INFORMATION
FRAME
- CHECK
SEQUENCE
FLAG
f i r s t - b i t
transmitted
B I T NUMBER !
OCTET NO
1
2
3
4
5
6
7
8
9
N-2
N- I
N
1
0
0 I
0
0
0
0
0
0
1
I I I 1 I U S ~ RDA TA I
I 9 M O ~ T SIGNIF~CANT O C T ~ T I 16 I
I L&T SIGNTITCOANAT T -I- B T
0 1 1 1 1 1 1 0
8 7 6
0 1 ' 1
22 23 24
5
1 ' 1 ' 1
25 26 27
4
1
A/G* I
15
T Desli-.ation " ' " I 2 1
8 -I- D ~ ~ X d r e s s ~ 14 T
1 -r T T T T 7
22 I 24 25 26 27
3
C/R
2
15 7 sake 1 1 I 21
8 T T D ~ f i d d r e s s ~ T
T' 14
1
T T T T T I 7
I I
P/ F
I I
Appendix to Chapter 6
REFERENCES
1. REFERENCES
References to Standards from the International Organization for Standardization (130) are as specified (including date published)
below. These IS0 Standards shall apply to the extent specified in the SAKPs.
2. NORMATIVE REFERENCES
These SARPs reference the following IS0 documents:
Date
published
Information technology - IS0 7-bit coded character set for
information interchange
HDLC Procedures - Frame Stmcrure, Version 3
HDLC Elements of Procedures, Version 3
OSI Basic Reference Model, Version 1
HDLC Procedures - Consolidation of Classes of
Procedures, Version I
Information Processing Systems - Data Communications -
X.25 Packet Level Protocol for Data Tenninnl Equipment
HDLC Procedures - General Purpose XID Frame
Information Field Content and Format, Version [I]
OSI Data Link Service Dejnition, Version 3
Local Area Networks - MAC Service De$nition, Version 1
3/90
2nd ed.
3. BACKGROUND REFERENCES
The following documents are listed as reference material.
Date
Originator Title published
CCIR Report 384-3, Annex 111
CCSDS Telemetiy Channel Coding, Recommendation for Space 5/92
Data System Standards, Consultative Committee for Space
Date Systems, CCSDS 101.0-B-3, Blue Book
ANNEX 10 - VOLUME I11
-6/11/97 No. 72
CHAPTER 7. SUBNETWORK INTERCONNECTION
[to be developed]
ANNEX I0 - VOLUME 111
ATTACHMENT B TO PART I. GUIDANCE MATERIAL FQR
THE VHF DIGITAL LINK (VDL)
1. GUIDANCE MATERIAL FOR THE
VHF DIGITAL LINK (VDL)
Note.- The Standards and Recommended Practices
(SARPs) referred to are c~nfainedin Annex 10, Volume !!I,
Part I ; Chapter 6.
2. SYSTEM DESCRIPTION
2.1 The VDL system provides an air-ground data
communications link within the aeronautical telecornmunications
network (ATN). The VDL will operate in parallel with
the other ATN air-ground subnetworks.
2.2 VDL ground stsrtions consist of a VHF radio and a
computer capable of handling the W L protocol throughout
the coverage area. The VDL stations offer connectivity via a
ground-based telecommunications network (e.g. X.25 based)
to ATN intermediate systems which will provide access to
ground-based ATN end systems.
2.3 In order to communicate with the VDL ground
stations, aircraft are required to be equipped with VDL
avionics which will include a VHF radio and a computer
capable of handling the VDL protocol. The air-ground
communication will utilize 25 kHz channels in the VHF
aeronautical mobile (route) service band.
3. VDL PWCIPLES
3.1 Communications transfer principles
3.1.1 Connectivity between applications running in ATN
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