Fixed Mobile Convergence GSM WiFi Animation

8/6/2019 Fixed Mobile Convergence GSM WiFi Animation

http://slidepdf.com/reader/full/fixed-mobile-convergence-gsm-wifi-animation 1/14

Fixed Mobile ConvergenceFixed Mobile Convergence

Mobility in WiMobility in Wi--FiFi



MOBILITYMOBILITY

One's ability to use technology often used

to refer to access to information or applications from occasionally-connected,

portable, networked computing devices.



BackgroundBackground

This presentation is about how ongoing telephony

calls can be

transparently moved between a local WiFi (802.11)

network and

cellular telephony systems such as GSM, 3G, etc.

Reasons for doing this are primarily economicalbut other reasons

may exists (e.g better audio quality).



Dual Technology SystemDual Technology System

WiFi, low cost (good audio quality).

GSM, expensive but good coverage.

Goal is to transparently move calls in order to minimizeexpenses

while still maintaining acceptable audio quality.



Basic algorithm:Basic algorithm:

WiFi: If predicted WiFi-quality is poor switch toGSM;

GSM: If predicted WiFi-quality is good switch to

WiFi;Same signal Quality of WiFi & GSM: Freedom Of

Selection.

Observe that we postulate that GSM quality is

always standardised andthat GSM service is universal but more expensive.

The problem is reduced to predicting perceivedaudio quality.



Quality according to the ITUQuality according to the ITU

MOS - Mean Opinion Score (subjective).

PESQ - Perceptual Evaluation of Speech Quality

(instrumental).E-model - Simple model, used e.g in frequency planning.

MOS score units

4.5 - Excellent

4.0 - Good

3.0 - Fair

2.0 - Poor

1.0 - Bad



WiFi losses are often burstyWiFi losses are often bursty

Loss burstiness makes a big difference!

10% uniform losses yields 1 MOS unitdegradation.

2.5% burst loss over 8s yields 1 MOS unitdegradation.

By recording loss distributions over a past

time interval we canapproximate the expected PESQ value in

much less than 1 second.



ASNAPASNAP� Automatic Switching of Network Access Points.

� The ASNAPTM technology enables Seamless

Session transparency, of all Sessions,� Voice/Video/Data across Antennae on dual

mode cellphones (WiFi and Macro-Cellular) aswell as across Devices: Residential, Enterpriseto Macro Networks (Cellular phones, WiFi

enabled PCs/TVs/Stereos, Satellite devices, andWireline

devices).



3G WWAN3G WWAN

MxN ± Mixed-Network Client Use

Case

HomeHome

AirportAirport

Z one 1 Z one 2 Z one 3

Z one 4 Z one 5 Z one 6

Z one 7 Z one 9WiMAXWiMAX Z one 8 WiMAXWiMAX

Radio State

3G WWAN

Wi-Fi

WiMAX

GPS

Radio State

3G WWAN

Wi-Fi

WiMAX

GPS

Radio State

3G WWAN

Wi-Fi

WiMAX

GPS

Radio State

3G WWAN

Wi-Fi

WiMAX

GPS

Radio StateRadio State

3G WWAN

Wi-Fi

WiMAX

GPS

Radio State

3G WWAN

Wi-Fi

WiMAX

GPS

Radio State

3G WWAN

Wi-Fi

WiMAX

GPS

IEEE 802.21 for Network DiscoveryIEEE 802.21 for Network DiscoveryIEEE 802.21, SIP, VCC, IMS, for Network Selection and ServiceIEEE 802.21, SIP, VCC, IMS, for Network Selection and Service

Continuity across multiple radios (3G WWANContinuity across multiple radios (3G WWAN WiWi--FiFi WiMAX)WiMAX)802.21, SIP, IMS for Service Continuity (Wi802.21, SIP, IMS for Service Continuity (Wi--FiFi WiMAX)WiMAX)VCC, SIP, IMS for Call Continuity (3G WWANVCC, SIP, IMS for Call Continuity (3G WWAN WiWi--Fi)Fi)

Plug into power jack

Wakeup Wi-Fi

Continue over Wi-Fi

Wi-Fi Link Going Down.

Operator initiated switch to WiMAX

Continue session on WiMAXShutdown Wi-Fi

Connect to

Wi-Fi

Battery level low

Shutdown WiMAX

Switch to3G

WWAN

Wakeup Wi-Fi

Continue

session on Wi-Fi

Operating on

3GWWAN

Continue session

on 3G WWAN



Video streaming ContinuityVideo streaming Continuity



WiFiWiFi Authentication Process Authentication Process



THE ENDIF YOU HAVE ANY QUESTION, YOU ARE

WELCOME

Fixed Mobile Convergence GSM WiFi Animation

Documents

Transcript of Fixed Mobile Convergence GSM WiFi Animation