Haowei Bai and Mohammed Atiquzzaman

The University of Dayton, Dayton, Ohio

William Ivancic

Glenn Research Center, Cleveland, Ohio

Achieving QoS for Aeronautical

Telecommunication Networks

Over Differentiated Services

NASA/TM—2001-210754

March 2001
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NASA/TM—2001-210754

March 2001

National Aeronautics and

Space Administration

Glenn Research Center

Haowei Bai and Mohammed Atiquzzaman

The University of Dayton, Dayton, Ohio

William Ivancic

Glenn Research Center, Cleveland, Ohio

Achieving QoS for Aeronautical

Telecommunication Networks

Over Differentiated Services
Acknowledgments

The authors thank NASA Glenn Research Center for support of this project. Faruque Ahamed carried out

some initial work on this project.

Available from

NASA Center for Aerospace Information

7121 Standard Drive

Hanover, MD 21076

Price Code: A03

National Technical Information Service

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Price Code: A03

Available electronically at http://gltrs.grc.nasa.gov/GLTRS
Our

NASA/TM—2001-210754 1

National Aeronautics and Space Administration

Glenn Research Center
NASA/TM—2001-210754 2
NASA/TM—2001-210754 3
NASA/TM—2001-210754 4
NASA/TM—2001-210754 5
Data

Network Layer

Length Indicator

Version/Protocol ID

Lifetime

SP MS E/R

Type

Segment Length

Checksum

Destination Address

 Length Indicator

Destination Address

Source Address

 Length Indicator

Source Address

Segment Offset

Total Length

Options

Data Unit Identifier

IP Packet ATN Packet

Version Field

Internet Header

Type of service

Total Length

Identification

0 DF MF

Fragment Offset

Time to Live

 Protocol

Header checksum

Source Address

Destination address

Options Field

Data

Priority

0 0 0 0 Priority

1110 high

1101

1100

1011

1010

1001

1000

0111

0110

0101

0100

0011

0010

0001-low

0000-normal

NASA/TM—2001-210754 6
Diffserv

configuration &

management

interface

Management

SNMP,

COPS

etc.

Data in

Ingress

interface

Classify,

meter,

action,

queueing

Routing

core

Egress 

interface

Classify,

meter,

action,

queueing

Data out

QoS agent

(optional,

e.g. RSVP) QoS control

messages

NASA/TM—2001-210754 7
AF11

AF12

AF13

AF21

AF22

AF23

AF31

AF32

AF33

AF41

AF42

AF43

Class 1 Class 2 Class 3 Class 4

Low 

drop

prec

High

drop

prec

Medium

drop

prec

NASA/TM—2001-210754 8
ATN

Domain

MappingFunction

DS Router

ATN Packets DS Packets

NASA/TM—2001-210754 9
DS

Router

DS

Router

5Mb,1ms

2Mb, 0.1ms

2Mb, 0.1ms

2Mb, 0.1ms

2Mb,

0.1ms

2Mb, 0.1ms

2Mb, 0.1ms

2Mb, 0.1ms

2Mb,

0.1ms

2 ATN

Sources

with

Priority

Code:

0000 1110

3 ATN

Sources

with

Priority

Code:

0000 0111

5 ATN

Sources

with

Priority

Code:

0000 0000

ATN Sources ATN Sinks

0

1

2

4

5

9

0

1

2

4

5

9

NASA/TM—2001-210754 10
NASA/TM—2001-210754 11
NASA/TM—2001-210754 12
NASA/TM—2001-210754 13
QueueSizeVS.Time

0111(AF)q.tr

0000(BE)q.tr

1110(EF)q.tr

QueueSize

Time

0.0000

0.5000

1.0000

1.5000

2.0000

2.5000

3.0000

3.5000

4.0000

4.5000

5.0000

0.0000 20.0000 40.0000 60.0000 80.0000 100.0000

QueueSizeVS.Time

0111(AF)q.tr

0000(BE)q.tr

1110(EF)q.tr

QueueSize

Time

0.0000

10.0000

20.0000

30.0000

40.0000

50.0000

60.0000

70.0000

80.0000

90.0000

100.0000

110.0000

120.0000

130.0000

140.0000

150.0000

160.0000

170.0000

180.0000

190.0000

200.0000

0.0000 20.0000 40.0000 60.0000 80.0000 100.0000

NASA/TM—2001-210754 14
NASA/TM—2001-210754 15
QueueSizeVS.Time

0111(AF)q.tr

0000(BE)q.tr

1110(EF)q.tr

QueueSize

Time

0.0000

5.0000

10.0000

15.0000

20.0000

25.0000

30.0000

35.0000

40.0000

45.0000

0.0000 20.0000 40.0000 60.0000 80.0000 100.0000

QueueSizeVS.Time

0111(AF)q.tr

0000(BE)q.tr

1110(EF)q.tr

QueueSize

Time

0.0000

10.0000

20.0000

30.0000

40.0000

50.0000

60.0000

70.0000

80.0000

90.0000

100.0000

110.0000

120.0000

130.0000

140.0000

150.0000

160.0000

170.0000

180.0000

190.0000

200.0000

0.0000 20.0000 40.0000 60.0000 80.0000 100.0000

NASA/TM—2001-210754 16
NASA/TM—2001-210754 17
NASA/TM—2001-210754 18
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E–12684

WU–322–20–2A–00

24

A03

Achieving QoS for Aeronautical Telecommunication

Networks Over Differentiated Services

Haowei Bai, Mohammed Atiquzzaman, and William Ivancic

Protocol; Internet

Unclassified -Unlimited

Subject Category: 17 Distribution: Nonstandard

Haowei Bai and Mohammed Atiquzzaman, Department of Electrical and Computer Engineering, The University of

Dayton, Dayton, Ohio 45469–0226 (work funded by NASA Grant NAG3–2318); and William Ivancic, NASA Glenn

Research Center. Responsible person, William D. Ivancic, organization code 5610, 216–433–3494.

Aeronautical Telecommunication Network (ATN) has been developed by the International Civil Aviation Organization to

integrate Air-Ground and Ground-Ground data communication for aeronautical applications into a single network serving

Air Traffic Control and Aeronautical Operational Communications. To carry time critical information required for

aeronautical applications, ATN provides different Quality of Services (QoS) to applications. ATN has therefore, been

designed as a standalone network which implies building an expensive separate network for ATN. However, the cost of

operating ATN can be reduced if it can be run over a public network such as the Internet. Although the current Internet

does not provide QoS, the next generation Internet is expected to provide QoS to applications. The objective of this

paper is to investigate the possibility of providing QoS to ATN applications when it is run over the next generation

Internet. Differentiated Services (DiffServ), one of the protocols proposed for the next generation Internet, will allow

network service providers to offer different QoS to customers. Our results show that it is possible to provide QoS to ATN

applications when they run over a DiffServ backbone.