© CTIE 2006A Mechanism for Enhancing VoIP Performance over Wireless Networks using Embedded Mobility-Specific Information in RSVP Objects 1 A Mechanism

© CTIE 2006 A Mechanism for Enhancing VoIP Performance over Wireless Networks using Embedded Mobility-Specific Information in RSVP Objects

1

A Mechanism for Enhancing VoIP Performance over Wireless Networks using Embedded Mobility-Specific

Information in RSVP Objects

Ahmad Belhoul Y. Ahmet Şekercioğlu Nallasamy Mani

Centre for Telecommunications and Information EngineeringMonash University, Melbourne, Australia

{ahmad.belhoul, ahmet.sekercioglu, nallasamy.mani} @eng.monash.edu.au


2

Outline

• RSVP, Interruption in QoS

• Mobile IP and HMIP

• RSVP Message and Object Format

• RSVP-ME

• Simulation Results

• Conclusion & Future Work


3

RSVP Reservation Setup

Mobile Receiver

Path

Sender

Path State


4


Mobile Receiver

Path State

Sender

Path State


5


Mobile Receiver

Path State

Sender

Path State

PathState


6


Mobile Receiver

Path State

Sender

PathState

PathState

Path State


7


Mobile Receiver

Path State

Sender

Path State

PathState

PathState


8

PathState


Mobile Receiver

Sender

Resv

Path State

Path State

PathState


9

PathState


Mobile Receiver

Sender

Path State

Path State


10

Path State


Mobile Receiver

Sender

Path State


11

Path State


Mobile Receiver

Sender


12


Mobile Receiver

Sender


13


Mobile Receiver

Sender


14


Mobile Receiver

Sender


15


Mobile Receiver

Sender


16

RSVP Interruption in QoS

Mobile Receiver

Sender

L2 Handoff Latency

Address Resolution L3 Handoff Latency


17

Mobile Receiver

Sender

Establishing theReservations

L2 Handoff Latency




18

Mobile Receiver

Sender

Establishing theReservations

L2 Handoff Latency




19

RSVP Relinquishing Reservations

Mobile Receiver

Sender

Teardown1) Teardown message


20

RSVP Relinquishing Reservations

Mobile Receiver

Sender

1) Teardown message

2) Timeout


21

TIQoS

Total Interruption in QoS

TIQoS = λHandoff + λRSVP

TIQoS = λL2 + λAdr + λL3 + λRSVP


22

Mobile IP Interoperability

Correspondent NodeHA

FA

Internet

Home N/W

Foreign N/W


23


Correspondent Node

Mobile Host

HA

FA

Internet

Home N/W

Foreign N/W

Home Adrs

CoA


24


Correspondent Node

Mobile Host

HA

FA

Internet

Home N/W

Foreign N/W

BU =>HA(CoA , HoA)

CoA


25


Correspondent Node

Mobile Host

HA

FA

Internet

Home N/W

Foreign N/W

Source: CNDestin: HoA


26


HA

Internet

Home N/W

Foreign N/W

FA

Correspondent Node

Source: HADestin: CoA

Mobile Host


27

Mobile IP Triangular Routing

HA

Internet

Home N/W

Foreign N/W

FA

Correspondent Node

Mobile Host

TriangularRouting


28

Mobile IP Route Optimisation

Correspondent Node

Mobile Host

HA

FA

Internet

Home N/W

Foreign N/W

BU => CN:(CoA , HoA)


29

HMIP Global Mobility


MAP

Home N/WInternet

PCoA

Mobile Host

Source: CNDestin: VCoA

VCoA

AP2 AP1

Foreign N/W


30

HMIP Global Mobility


MAP

Home N/WInternet

PCoA

Mobile Host

VCoA

Source: MAPDestin: PCoA

AP2 AP1

Foreign N/W


31

RSVP object

RSVP object

RSVP Message Format

8 24 3216

Ver Flags Msg type RSVP Checksum

Send_TTL (Reserved) RSVP Length

0

1

2

3

4

5

6

8

7

0


32

RSVP PATH Message

8 24 3216

0001 Flags 0000 0001 RSVP Checksum


T_Spec

0

1

2

3

4

5

6

8

7

0

Sender Template


33

RSVP-ME Object Format

8 24 3216

Length (bytes) Class-Num C-Type

Object Content

0

1

2

n

0


34

RSVP-ME Sender Template

8 24 3216

Length (bytes) 0000 1011 0000 0010

Sender IP address

Sender Port Number

Protocol ID

0

1

2

n

0


35

RSVP-ME BU object

8 24 3216

0000 0000 0010 0000 11bb bbbb 0000 0010

Home Address (16 bytes)

Care Of Address (16 bytes)

0

1

2

3

4

5

6

8

7

0


36

RSVP PATH + BU object

8 24 3216

0001 Flags 0000 0001 RSVP Checksum


T_Spec

0

1

2

3

4

0

Sender Template

Binding Update

n


37

RSVP-ME Operation

Correspondent Node

Mobile Host

HA

FA

Internet

Home N/W

Foreign N/W


38

RSVP-ME Operation

HA

Internet

Home N/W

Foreign N/W

FA

Correspondent Node

PathTear + BU object

Mobile Host


39

RSVP-ME Operation

HA

Internet

Home N/W

Foreign N/W

FA

Correspondent Node

Mobile Host


40

Mobile Receiver

Sender



41

Mobile Receiver

Sender



42

Simulation Model

10 Mbps80ms

10 Mbps10ms

10 Mbps10ms

10 Mbps10ms

10 Mbps10ms

1 Mbps2ms

1 Mbps2ms

N1

MAPN2 N3

AR1 AR2

HACNi CNCNn+1CNn+2

MNn+i

MNn+i

MNn+i

MNn+iMNn+i

MNn+i

MNn+iMN

MNn+i


43

E-Model

Ro: Signal-to-Noise Ratio (SNR)

Is: Simultaneous impairment factor

Id: Equipment delay impairment factor

Ie: Equipment packet loss impairment factor

A: Advantage Factor (A)

R = Ro – Is – Id – Ie + A


44

E-Model

Delay Loss

R = 94.2 – ( Id + Ie )


45

R-factor to MOS conversion

R-factor QoS Assessment MOS

90 < R < 100 Excellent 4.34 - 4.5

80 < R < 90 Very Good 4.03 - 4.34

70 < R < 80 Good 3.60 - 4.03

60 < R < 70 Fair 3.10 - 3.60

50 < R < 60 Poor 2.58 - 3.10

0 < R < 50 Bad 1.0 – 2.58


46

RSVP Performance


47

RSVP Performance

Model QoS Interruption (ms)

RSVP over Mobile IP 732

RSVP-ME over Mobile IP 528

RSVP over HMIP 192

RSVP-ME over HMIP 168

27.9%

12.5%


48

Conclusion

• Outlined the inefficiencies of Mobile IP

• Proposed RSVP Mobility Extension (RSVP-ME)

• Addressed the MIP encapsulation issue

• Improved Interruption in QoS

• Maintained compatibility with RFC 2205

• Minimal changes (to end nodes)


49

Future Work

• Experiment with other sources of time-sensitive traffic such as Video-over-IP

• Further reduce the Interruption in QoS by not confining to RFC2205


50

Thank You!


51

Simulation Parameters

Simulation ParametersAccess Routers Coverage area 40 mDistanced Between Access Routers 70 mMobile Node Transmission Range 100 mTarget MN movement DeterministicInterfering MN movement Random Waypoint Video Codec MPEG4Initialization Period 20 s

VoIP Traffic ParametersVoIP Packet Size 220 bytesVoIP Codec G.711Codec Bandwidth 88 kbps


52

RSVP Signaling

MN CN

BUMN sends a

BU

1

Path (CNMN)

Back CN replies with Back and

sends a PATH for the

(CNMN) direction

2

VoIP data packets

Resv(MNCN) CN replies with a RESV

for the (MNCN) direction

4

Resv (CNMN)

Path (MNCN)

MN replies with a RESV and

sends a PATH for the

(MNCN) direction

3


53

RSVP-ME Signaling

MN CN

Path + BU object (MNCN)MN sends a PATH with a BU object for

the (MNCN) direction

1

Resv (CNMN)MN replies

with a RESV for the

(CNMN) direction

3

Resv + Back object (MNCN)

Path (CNMN)

• CN is updated with new CoA

• It responds with a RESV with a Back object (MNCN)

• It issues a PATH for the (CNMN) direction

2

VoIP data packets

Documents

© CTIE 2006A Mechanism for Enhancing VoIP Performance over Wireless Networks using Embedded Mobility-Specific Information in RSVP Objects 1 A Mechanism