Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

QoS

for

Rea

l Tim

e A

pplic

atio

ns o

ver

Nex

t Gen

erat

ion

Dat

a N

etw

orks

Pro

ject

Sta

tus

Rep

ort:

Par

t 1

June

2, 2

000

http

://w

ww

.en

gr.u

dayt

on.e

du/fa

culty

/mat

iquz

z/P

res/

QoS

.pd

f

Uni

vers

ity o

f D

ayto

nM

oh

amm

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uzz

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ai

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vers

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aj J

ain

Muk

ul G

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rani

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dava

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rind

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aul

Chu

n Le

i Liu

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urre

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NASA/TM—2001-210904 101

https://ntrs.nasa.gov/search.jsp?R=20050019504 2020-01-26T21:28:52+00:00Z

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

Out

line

of T

alk

nP

rese

nt s

tate

of t

he I

nter

ent.

nQ

oS a

ppro

ache

s to

futu

re d

ata

netw

orks

. n

Res

earc

h Is

sues

.n

Pro

gres

s to

dat

e:�

Task

1:

DS

ove

r A

TM�

Task

2:

IS o

ver

DS

�Ta

sk 3

: A

TN�

Task

4:

Sat

ellit

e ne

twor

ks�

Task

5:

MP

LS

nC

oncl

usio

ns.

NASA/TM—2001-210904 102

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rgCur

rent

Inte

rnet

nTC

P/IP

glu

es to

geth

er a

ll th

e co

mpu

ters

in th

e In

tern

et.

nTC

P/IP

was

des

igne

d fo

r te

rres

tria

l net

wor

ks.

nTC

P/IP

doe

s no

t�

offe

r Q

oS t

o re

al t

ime

appl

icat

ions

, or

�pe

rfor

m w

ell i

n lo

ng d

elay

ban

dwid

th n

etw

orks

.

NASA/TM—2001-210904 103

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

Eff

orts

to p

rovi

de Q

oS in

Inte

rnet

nIn

tegr

ated

Ser

vice

s (IS

)n

Diff

eren

tiate

d S

ervi

ces

(Diff

Ser

v)n

Exp

licit

Con

gest

ion

Not

ifica

tion

(EC

N)

nM

ultip

roto

col L

abel

Sw

itchi

ng (

MP

LS)

nA

sync

hron

ous

Tran

sfer

Mod

e (A

TM)

NASA/TM—2001-210904 104

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

Inte

grat

ed S

ervi

ces

nR

SV

P to

res

erve

res

ourc

es d

urin

g co

nnec

tion

setu

p.n

End

-to

-end

QoS

gua

rant

ees.

nA

rou

ter

has

to k

eep

info

rmat

ion

abou

t all

conn

ectio

ns

pass

ing

thro

ugh

the

rout

er.

nG

ives

ris

e to

sca

labi

lity

prob

lem

in th

e co

re r

oute

rs.

NASA/TM—2001-210904 105

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rgRS

VP

Sig

nalin

g

Rou

ter1

Rou

ter1

Rou

ter2

Rou

ter2

Send

erR

ecei

ver

PA

TH

mes

sage

RE

SV m

essa

ge

DA

TA

NASA/TM—2001-210904 106

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rgRS

VP

Sig

nalin

g

nR

eser

ves

a po

rtio

n of

link

ban

dwid

th in

eac

h ro

uter

nTh

e se

nder

sen

ds a

PA

TH m

essa

ge w

ith r

esou

rce

requ

irem

ents

for

a f

low

. n

Rec

eive

r re

spon

ds w

ith a

RE

SV

mes

sage

nE

ach

rout

er p

roce

sses

the

RE

SV

to r

eser

ve th

e re

quir

ed r

esou

rces

req

uest

ed b

y th

e se

nder

. n

Rou

ters

can

mod

ify th

e Q

oS p

aram

eter

s of

the

RE

SV

m

essa

ge if

eno

ugh

reso

urce

s ar

e n

ot a

vaila

ble

to m

eet

the

requ

irem

ents

.n

Eac

h ro

uter

in th

e en

tire

path

con

firm

s th

e en

d-t

o-e

nd

rese

rvat

ion

for

the

flow

.

NASA/TM—2001-210904 107

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

IS S

ervi

ce C

lass

es

nG

uara

ntee

d Lo

ad S

ervi

ce�

Lo

w e

nd

-to

-end

del

ay, J

itter

, Los

s.�

Hig

hest

pri

ority

ser

vice

.

nC

ontr

olle

d L

oad

Ser

vice

�N

etw

ork

shou

ld f

orw

ard

the

pack

ets

with

que

uing

del

ay

not

grea

ter

than

tha

t ca

used

by

the

traf

fic’s

ow

n bu

rstin

ess

(RFC

247

4).

�P

erfo

rman

ce s

imila

r to

tha

t of

an

unlo

aded

net

wor

k.�

Traf

fic s

peci

ficat

ions

from

the

Tspe

c.

nB

est E

ffor

t

NASA/TM—2001-210904 108

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

Diff

eren

tiate

d S

ervi

ces

nS

imila

r tr

affic

are

gro

uped

into

cla

sses

.n

Res

ourc

es r

eser

ved

for

clas

ses.

nQ

oS p

rovi

ded

to c

lass

es.

�Q

oS t

o in

divi

dual

con

nect

ions

is a

n op

en r

esea

rch

issu

e.

nQ

oS m

aint

aine

d by

:�

Cla

ssifi

catio

n�

Traf

fic p

olic

ing

úM

eter

ing,

dro

ppin

g, t

aggi

ng�

Traf

fic s

hapi

ng

nP

er H

op B

ehav

ior

(PH

B)

�S

peci

fies

QoS

rec

eive

d by

pac

kets

i.e.

how

pac

kets

are

tr

eate

d by

the

rou

ters

.

NASA/TM—2001-210904 109

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

Asy

nchr

onou

s Tr

ansf

er M

ode

nS

tron

g Q

oS g

uara

ntee

s; s

uita

ble

for

real

tim

e ap

plic

atio

ns.

nH

igh

cost

pro

hibi

ts u

se a

t the

edg

e ne

twor

k or

to th

e de

skto

p.n

Cur

rent

ly u

sed

at th

e co

re o

f the

Inte

rnet

.

NASA/TM—2001-210904 110

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

Nex

t Gen

erat

ion

Inte

rnet

nR

oute

rs a

t the

edg

e ne

twor

k w

ill n

ot n

eed

to c

arry

too

man

y co

nnec

tions

�IS

can

be

used

at

the

edge

net

wor

k.

nC

ore

netw

ork

need

s to

car

ry lo

t of

con

nect

ions

. �

Com

bina

tion

of D

S, A

TM a

nd M

PLS

at

the

core

.

nS

atel

lite/

Wir

eles

s lin

ks

�R

emot

e co

nnec

tivity

and

mob

ility

.

NASA/TM—2001-210904 111

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rgRes

earc

h Is

sues

nS

ervi

ce m

appi

ng b

etw

een

netw

orks

.n

Loss

and

del

ay g

uara

ntee

s.n

Inte

rope

rabi

lity

amon

g ed

ge a

nd c

ore

tech

nolo

gies

.n

Inte

rope

rabi

lity

with

Aer

onau

tical

Tel

ecom

mun

icat

ions

N

etw

ork

(ATN

).n

Ope

ratio

n in

sat

ellit

e en

viro

nmen

t hav

ing

high

del

ay

and

loss

.

NASA/TM—2001-210904 112

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

Task

1

Prio

ritiz

ed E

arly

P

acke

t Dis

card

NASA/TM—2001-210904 113

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

Asy

nchr

onou

s Tr

ansf

er M

ode

(ATM

)

nS

ervi

ce C

lass

es�

Con

stan

t B

its R

ate

(CB

R)

�A

vaila

ble

Bit

Rat

e (A

BR

)�

Uns

peci

fied

Bit

Rat

e (U

BR

)

nC

LP in

cel

l hea

der

�D

eter

min

es lo

ss p

rior

ity o

f pac

kets

NASA/TM—2001-210904 114

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

Diff

eren

tiate

d S

ervi

ces

Dat

a P

acke

t

Voi

ce P

acke

t

nS

ervi

ce C

lass

es�

Pre

miu

m S

ervi

ce:

emul

ates

leas

ed li

ne�

Ass

ured

Ser

vice

�B

est

Eff

ort

Ser

vice

nV

ario

us le

vels

of d

rop

prec

eden

ce.

�N

eed

to b

e m

appe

d to

ATM

whe

n ru

nnin

g D

S o

ver

ATM

.�

Cou

ld b

e po

ssib

le m

appe

d to

the

CLP

bit

of A

TM c

ell

head

er.

NASA/TM—2001-210904 115

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

DS

ove

r A

TM

nP

ossi

ble

Ser

vice

Map

ping

s�

Pre

miu

m S

ervi

ce à

ATM

CB

R s

ervi

ce.

�A

ssur

ed S

ervi

ce à

ATM

UB

R s

ervi

ce w

ith C

LP=0

�B

est E

ffor

t à

ATM

UB

R s

ervi

ce w

ith C

LP=1

nD

S p

acke

ts a

re b

roke

n do

wn

into

cel

ls a

t the

DS

-ATM

ga

tew

ay�

Dro

p pr

eced

ence

map

ped

to C

LP b

it

nB

uffe

r M

anag

emen

t at

ATM

sw

itche

s�

Par

tial P

acke

t Dis

card

(PP

D)

�E

arly

Pac

ket

Dis

card

(E

PD

)

NASA/TM—2001-210904 116

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

Pri

oriti

zed

EP

D

nD

S s

ervi

ce c

lass

es c

an u

se th

e C

LP b

it of

ATM

cel

l he

ader

to p

rovi

de s

ervi

ce d

iffer

entia

tion.

nE

PD

doe

s no

t con

side

r th

e pr

iori

ty o

f cel

ls.

nP

rior

itize

d E

PD

can

be

used

to p

rovi

de s

ervi

ce

disc

rim

inat

ion.

nTw

o th

resh

olds

are

use

d to

dro

p ce

lls d

epen

ding

on

the

CLP

bit.

NASA/TM—2001-210904 117

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

Buf

fer

Man

agem

ent S

chem

es

nE

PD

nP

EP

D

0N

µλ

TH

TLT

0N

µλ

•QL

< T

Acc

ept a

ll pa

cket

s.

•T ≤

QL

< N

Dis

card

all

new

inco

min

g pa

cket

s.

•QL

≥N •D

isca

rd a

ll.

•QL

<LT

Acc

ept a

ll pa

cket

s.

•LT

≤Q

L <

HT

Dis

card

all

new

low

prio

rity

pack

ets.

•HT

≤Q

L <

N

Dis

card

all

new

pac

kets

QL

≥N •D

isca

rd a

ll pa

cket

s

NASA/TM—2001-210904 118

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

Ste

ady

Sta

te D

iagr

am

NASA/TM—2001-210904 119

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

Ste

ady

Sta

te E

quat

ions

∑ =

+

+

+−

+−

−+

−

−+

−

=+

<<

=+

<≤

+−

=+

<≤

+==

=+

<<

+=

+≤

<+

++

=+

≤≤

++

=+

==

N ii

i

ii

ii

i

ii

i

NN

NN

ii

i

ii

ii

ii

ii P

P

LTi

PP

q

HT

iLT

PP

hq

Pqh

Ni

HT

PP

qP

PP

Pp

P

Ni

HT

PP

pP

HT

iLT

Pqh

PP

qhp

PLT

iP

qP

PP

PP

q

PP 0

1,0,

1,11,

1,10,

1,

1,10,

1,

0,1,

0,10,

0,10,1

0,

1,10,1

0,10,

1,10,1

0,10,

1,11,0

0,10,0

1)

(

0)

(

)1(

)(

)(

)(

)(

)(

1)

(

µλ

µµ

λλ

µ

µλ

µλ

µλ

µλ

µλ

µλ

λµ

λλ

µλ

λµ

λµ

λµ

λµ

λ

NASA/TM—2001-210904 120

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

Goo

dput

∑∞ ==

=

∑∞ ==

==

=

1n

)1n,

nP(

1n

)1,1

n,nP

(

UW

UV

W

hG

NASA/TM—2001-210904 121

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rgQu

eue

Occ

up

ancy

Sim

ulat

ion:

N=1

20, L

T=6

0, H

T=80

, h=0

.5, q

=1/6

.

020

4060

801

00

120

0

0.0

1

0.0

2

0.0

3

0.0

4

0.0

5

0.0

6

0.0

7

Queue le

ngth

ProbabilityS

imu

latio

n,lo

ad

1.0

Mo

de

l,lo

ad

1.0

Sim

ula

tion

,loa

d 1

.4M

od

el,l

oa

d 1

.4S

imu

latio

n,lo

ad

1.8

Mo

de

l,lo

ad

1.8

Sim

ula

tion

,loa

d 2

.2M

od

el,l

oa

d 2

.2

NASA/TM—2001-210904 122

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

Go

od

pu

tver

sus

load

for

h=0

.5

0.8

11

.21

.41

.61

.82

2.2

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.91

Load

Goodput

G f

or s

imul

atio

nG

for

mod

elG

H f

or s

imul

atio

nG

H f

or m

odel

GL

for

sim

ulat

ion

GL

for

mod

el

Sim

ulat

ion:

N=1

20, L

T=60

, HT=

80, q

=1/6

.

NASA/TM—2001-210904 123

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

Go

od

pu

tver

sus

load

for

h=0

.2, 0

.5, 0

.8

0.8

11.

21

.41.

61.

82

2.2

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.91

Load

Googput

G f

or 0

.2G

for

0.5

G f

or 0

.8G

H f

or 0

.2G

H f

or 0

.5G

H f

or 0

.8G

L fo

r 0.

2G

L fo

r 0.

5G

L fo

r 0.

8

Sim

ulat

ion:

N=1

20, L

T=60

, HT=

80, q

=1/6

.

NASA/TM—2001-210904 124

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

Go

od

pu

tfo

r h

igh

pri

ori

ty v

s. H

T

6070

8090

100

110

120

0.4

0.5

0.6

0.7

0.8

0.91

Hig

h T

hres

hold

,HT

Googput for high priority

GH

for

h=

0.2

GH

for

h=

0.4

GH

for

h=

0.6

GH

for

h=

0.7

GH

for

h=

0.8

GH

for

h=

1.0

Sim

ulat

ion:

LT=

60, q

=1/6

NASA/TM—2001-210904 125

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

Go

od

pu

tof h

igh

pri

ori

ty v

s. h

00

.10

.20.

30.

40.

50

.60

.70.

80.

91

0.4

0.5

0.6

0.7

0.8

0.91

Pro

babi

lity

of h

igh

prio

rity

mes

sage

s,h

Googput for high priority

GH

for

load

=1.

2 H

T=

80G

H f

or lo

ad=

1.6

HT

=80

GH

for

load

=2.

0 H

T=

80G

H fo

r lo

ad=

1.6

HT

=10

0G

H fo

r lo

ad=

1.6

HT

=12

0

Sim

ulat

ion:

LT=

60

NASA/TM—2001-210904 126

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

Go

od

pu

tfo

r h

igh

pri

ori

ty v

ersu

s L

T

102

030

40

5060

7080

0.6

0.6

5

0.7

0.7

5

0.8

0.8

5

0.9

0.9

51

Low

Thr

esho

ld,

LT

Googput for high priority

GH

for

h=

0.2

GH

for

h=

0.4

GH

for

h=

0.6

GH

for

h=

0.7

GH

for

h=

0.8

GH

for

h=

1.0

Sim

ulat

ion:

N=1

20, H

T=80

, loa

d=1.

6, q

=1/6

.

NASA/TM—2001-210904 127

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

OP

NE

T S

imul

atio

n C

onfig

urat

ion

PE

PD

app

lied

NASA/TM—2001-210904 128

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

DS

-ATM

Pro

toco

l Sta

ck

nA

AL

Laye

r m

arks

the

End

of

Pac

ket.

nA

TM_l

ayer

cha

nges

the

CLP

bit

depe

ndin

g on

the

pack

et o

f th

e D

S s

ervi

ce.

NASA/TM—2001-210904 129

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

ATM

Sw

itch

Nod

e

nS

uppo

rt s

ervi

ce

diff

eren

tiatio

n in

the

ATM

sw

itch

buff

er.

nC

hang

e th

e bu

ffer

m

anag

emen

t sch

eme

in th

e A

TM_s

witc

h pr

oces

s to

P

rior

itize

d E

PD

.

NASA/TM—2001-210904 130

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

ATM

_Sw

itch

Pro

cess

Impl

emen

ts th

e P

EP

D b

uffe

r m

anag

emen

t to

supp

ort s

ervi

ce d

iffer

entia

tion.

NASA/TM—2001-210904 131

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

Task

2

Map

ping

of

IS o

ver

DS

NASA/TM—2001-210904 132

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

Traf

fic e

nter

ing

DS

dom

ain

Pack

et o

f siz

e P

ente

ring

DS

dom

ain

at b

ound

ary

node

Che

ck fo

r DS

fiel

d of

th

e pa

cket

AF/

EF

Che

ckin

g fo

r buf

fer

spac

e of

Q2

Che

ckin

g fo

r bu

ffer

sp

ace

of Q

1

EF

AF

I

nser

t int

o th

e E

F qu

eue

Dis

card

the

EF

inco

min

g pa

cket

Inse

rt in

to A

F qu

eue

If b

uffe

r oc

cupa

ncof

Dis

card

the

AF

inco

min

g pa

cket

Pu

sh e

noug

h E

F pa

cket

s T

o m

ake

spac

e fo

r A

F Pa

c

No

No

Yes

Yes

Yes

In/O

ut-o

f-pr

ofile

Yes

Sh

apin

g

No

NASA/TM—2001-210904 133

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

Diff

eren

tiate

d S

ervi

ces

nC

lass

ifica

tion:

Bas

ed o

n IP

hea

der

field

cla

ssifi

es in

to

BA

to r

ecei

ve p

artic

ular

per

hop

beh

avio

r (P

HB

)n

Met

erin

g: M

easu

ring

the

traf

fic a

gain

st to

ken

buck

et to

ch

eck

for

reso

urce

con

sum

ptio

nn

Sha

ping

: Tre

atm

ent o

f out

-of-

prof

ile tr

affic

by

plac

ing

it in

a b

uffe

r.n

Dro

pp

ing:

No

n-c

onfo

rman

t tra

ffic

can

be

drop

ped

for

cong

estio

n av

oida

nce

nA

dmis

sion

Con

trol

: Lim

iting

the

amou

nt o

f tra

ffic

ac

cord

ing

to th

e re

sour

ces

in th

e D

S d

omai

n.�

Impl

icit

Adm

issi

on C

ontr

ol:

Per

form

ed a

t ea

ch r

oute

r�

Exp

licit

Adm

issi

on C

ontr

ol :

Dyn

amic

res

ourc

e al

loca

tion

by a

cen

tral

ized

ban

dwid

th b

roke

r

NASA/TM—2001-210904 134

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

Var

ious

PH

B’s

nE

xped

ited

Forw

ardi

ng(E

F P

HB

)n

Ass

ured

For

war

ding

(AF

PH

B)

nB

est

Eff

ort

(Def

ault)

NASA/TM—2001-210904 135

Que

ue Im

plem

enta

tion

(RE

D)

Inco

min

g

Min

imum

Thr

esho

ld

Max

imum

T

hres

hold

RE

D R

egio

n

Pack

et D

rop

Prob

abili

ty

Que

ue S

ize

NASA/TM—2001-210904 136

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

QoS

Spe

cific

atio

ns

nB

andw

idth

: n

Late

ncy:

n

Jitt

er:

nLo

ss:

NASA/TM—2001-210904 137

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

Ser

vice

Map

ping

from

IS-D

S

nP

rovi

de d

iffer

ent l

evel

s of

ser

vice

diff

eren

tiatio

n.n

Pro

vide

QoS

to m

ultim

edia

and

mul

ticas

t app

licat

ions

.n

Sca

labi

lity

in te

rms

of r

esou

rce

allo

catio

n.n

Ther

e is

no

over

hea

d du

e to

per

flow

sta

te

mai

nten

ance

at

each

rou

ter.

nFo

rwar

ding

at

each

rou

ter

acco

rdin

g to

the

DS

CP

cod

e.n

PH

B’s

alo

ng th

e pa

th p

rovi

de a

sch

edul

ing

resu

lt ap

prox

imat

ing

the

QoS

req

uire

men

ts a

nd r

esul

ts in

ISIn

tegr

ated

Serv

ice

Dif

fere

ntia

ted

Serv

ice

Gua

rant

eed

Loa

dE

xped

ite F

orw

ardi

ng

Con

trol

led

Loa

dA

ssur

ed F

orw

ardi

ng

Bes

t eff

ort

Def

ault

best

eff

ort

NASA/TM—2001-210904 138

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rgDS

func

tiona

lity

nP

er H

op b

ehav

ior

(PH

B)

nB

ehav

ior

Agg

rega

te (

BA

)n

Diff

eren

tiate

d S

ervi

ces

Cod

e P

oint

(DS

CP

)

12

34

56

78

DS

field

CU

TO

S B

yte

NASA/TM—2001-210904 139

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

Gua

rant

eed

load

-E

F P

HB

nG

uara

ntee

d tr

affic

per

form

ance

can

be

met

eff

ectiv

ely

usin

g th

e E

F P

HB

with

pro

per

polic

ing

and

shap

ing

func

tions

.n

Sha

ping

Del

ay

nQ

ueui

ng D

elay

nP

acke

ts in

the

Sch

edul

er

NASA/TM—2001-210904 140

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

Con

trol

led

Load

-A

F P

HB

nC

lass

ified

into

del

ay c

lass

es b

ased

on

the

B/R

rat

io o

f Ts

pec

for

each

del

ay c

lass

; A

ggre

gate

Tsp

ec is

con

stru

cted

for

all

the

adm

itted

tra

ffic

.n

For

each

del

ay c

lass

, pol

ice

the

traf

fic a

gain

st a

tok

en b

ucke

t de

rive

d ab

ove.

nS

ize

of th

e qu

eue

is s

et to

lim

it th

e qu

euin

g d

elay

of A

F re

quir

emen

t.n

RIO

dro

ppin

g pa

ram

eter

s ar

e se

t ac

cord

ing

to t

he d

rop

prec

eden

ce o

f th

e A

F cl

ass.

nA

F in

stan

ce s

ervi

ce r

ate

is s

et t

o ba

ndw

idth

suf

ficie

nt

enou

gh t

o m

eet

the

dela

y an

d lo

ss r

equi

rem

ents

of

the

CL

traf

fic.

nB

andw

idth

dis

trib

uted

bet

wee

n A

F an

d B

E t

o pr

even

t th

e B

F fr

om s

tarv

atio

n.n

Sch

edul

ing

done

with

WFQ

(Wei

ghte

d Fa

ir Q

ueui

ng) o

r W

RR

(W

eigh

ted

Rou

nd R

obin

)

NASA/TM—2001-210904 141

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

Traf

fic C

ondi

tioni

ng a

t DS

B

ound

ary

BA

C

lass

ifier

Met

erM

arke

r

Dro

pper

Sha

per

Met

erM

arke

r

Dro

pper

Mar

ker

S c h e d u l e r

BE

Que

ue-R

ED

AF

Que

ue-R

IO

EF

Que

ue-P

Q

Out

put

Lin

kS

hape

r

Sha

per

Met

er

Dro

pper

NASA/TM—2001-210904 142

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

Map

ping

Tab

le fo

r IS

-to-

DS

Flo

w Id

T S

pec

Par

amet

ers

1R

= 4

00P

= 5

00B

= 7

002

R =

450

P =

550

B =

750

3R

= 5

00P

= 6

00B

= 8

004

R =

550

P =

650

B =

850

5R

= 6

00P

= 7

00B

= 9

006

R =

650

P =

750

B =

950

7R

= 7

00P

= 8

00B

= 1

000

8R

= 7

50P

= 8

50B

= 1

050

9R

= 8

00P

= 9

00B

= 1

100

10

R =

850

P =

950

B =

115

0

PH

BD

SC

P

AF

11

OO

1O1O

AF

32

O11

1OO

AF

41

1OO

O1O

EFO

OO

1OO

NASA/TM—2001-210904 143

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

Map

ping

of I

S to

DS

nTs

pec

para

met

ers

indi

catin

g re

sour

ce r

eser

vatio

n ta

ken

from

RS

VP

sig

nalin

g.n

Tabl

e en

try

cont

ains

Tsp

ec p

aram

eter

s, fl

ow ID

s, P

HB

gr

oups

and

DS

CP

val

ues.

nM

easu

res

actu

al tr

affic

flow

rat

e ag

ains

t a to

ken

buck

et

acco

rdin

g to

the

initi

al s

tore

d ta

ble

entr

y.n

If th

e tr

affic

is in

-pro

file

with

the

requ

este

d re

serv

atio

n,

it cl

assi

fies

the

pack

et a

nd m

arks

it w

ith th

e av

aila

ble

DS

CP

, whi

ch c

an a

ppro

xim

atel

y as

sure

the

requ

este

d Q

oS.

nTh

e ou

t-of

pro

file

traf

fic is

sto

red

in a

buf

fer

and

shap

ed to

be

in c

onfo

rman

ce w

ith th

e re

ques

ted

traf

fic

prof

ile.

NASA/TM—2001-210904 144

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

Map

ping

of I

S to

DS

(con

td.)

nP

acke

ts a

re f

orw

arde

d in

the

DS

dom

ain

acco

rdin

g to

th

e D

SC

P v

alue

and

the

PH

B g

roup

.n

The

forw

ardi

ng tr

eatm

ent i

s ba

sica

lly c

once

rned

with

th

e qu

eue

man

agem

ent p

olic

y an

d th

e pr

iori

ty o

f ba

ndw

idth

allo

catio

n; th

ese

ensu

re th

e re

quir

ed

min

imum

que

uing

del

ay, l

ow ji

tter

and

max

imum

th

roug

hput

.n

Dep

endi

ng o

n th

e im

plem

enta

tions

of t

heP

HB

’sin

side

th

e ne

twor

k, q

ueue

man

agem

ent c

ould

be

RE

D, W

RE

D,

PQ

, WFQ

.

NASA/TM—2001-210904 145

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

IS-D

S S

imul

atio

n C

onfig

urat

ion

Rou

ter1

Rou

ter2

EF

Sou

rces

1 -

5

AF

Sou

rces

6 -

12

BE

Sou

rces

13

-2

0

EF

Sin

ks

AF

Sin

ks

BE

Sin

ks

NASA/TM—2001-210904 146

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

Task

3

Inte

rope

rabi

lity

with

A

eron

autic

al

Tel

ecom

mun

icat

ions

N

etw

orks

(A

TN

)

NASA/TM—2001-210904 147

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rgOve

rvie

w o

f ATN

nA

eron

autic

al T

elec

omm

unic

atio

ns N

etw

ork.

nS

uppo

rtin

g da

ta li

nk b

ased

ATC

app

licat

ion

& A

OC

.n

Inte

grat

ing

Air

/Gro

und

& G

roun

d/G

roun

d da

ta

com

mun

icat

ions

net

wor

k in

to a

glo

bal i

nter

net s

ervi

ng

ATC

& A

OC

.n

Intr

oduc

ing

a ne

w p

arad

igm

of A

TC b

ased

on

data

link

ra

ther

tha

n vo

ice

com

mun

icat

ions

.n

Ope

ratin

g in

a d

iffer

ent e

nvir

onm

ent w

ith d

iffer

ent d

ata

com

mun

icat

ion

serv

ice

prov

ider

.n

Sup

port

ing

the

inte

rcon

nect

ion

ofE

ss&

Iss

usin

g a

vari

ety

ofsu

bnet

wor

kty

pes.

NASA/TM—2001-210904 148

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rgPur

pose

of A

TN

nU

sing

the

exis

ting

infr

astr

uctu

re.

nH

igh

avai

labi

lity.

nM

obile

Com

mun

icat

ions

.n

Pri

oriti

zed

end

-to

-end

res

ourc

e m

anag

emen

t.n

Sca

labi

lity.

nP

olic

y ba

sed

rout

ing.

nFu

ture

pro

ofin

g

NASA/TM—2001-210904 149

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

QoS

of A

TN

nP

rior

ityn

Tran

sit D

elay

nE

rror

Pro

babi

lity

nC

ost

nS

ecur

ityn

Rel

iabi

lity

NASA/TM—2001-210904 150

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

Mod

el o

f Tra

nspo

rt L

ayer

NASA/TM—2001-210904 151

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

Str

uctu

re o

f TP

DU

NASA/TM—2001-210904 152

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

Var

iabl

e Fi

elds

of T

PD

U h

eade

r

NASA/TM—2001-210904 153

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,

Com

pari

son

of A

TN &

IP P

acke

ts

NASA/TM—2001-210904 154

Opt

ions

Fie

ld o

f ATN

Pac

ket

NASA/TM—2001-210904 155

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

Opt

ions

Fie

ld o

f ATN

(con

td.)

NASA/TM—2001-210904 156

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: ie

ee

TPD

U &

NP

DU

Pri

ority

Tra

nsla

tion

NASA/TM—2001-210904 157

Moh

amm

ed A

tiquz

zam

an, U

nive

rsity

of D

ayto

n,E

mai

l: at

iq@

iee

e.o

rg

Con

clus

ions

nTa

sks

are

prog

ress

ing

wel

l and

as

plan

ned.

nM

odel

ing

of P

rior

itize

d E

PD

has

bee

n co

mpl

eted

.n

OP

NE

T si

mul

atio

n of

Pri

oriti

zed

EP

D to

be

cont

inue

d.n

ns s

imul

atio

n of

IS o

ver

DS

to b

e co

ntin

ued.

nA

TN o

ver

DS

map

ping

to b

e st

arte

d.

NASA/TM—2001-210904 158