Signal Strength-Based Approach for 3G/WLAN Handover on Nokia
N900 Devices
Signal Strength-Based Approach for
3G/WLAN Handover on Nokia N900
Devices
Dmitry YuranovOpen Source & Linux Lab
http://osll.fruct.org
FRUCT 10 10 November 2011
Problem Statement
Goals
Goal1
GoalN
Tasks
Task1: Deliverable1
TaskN: DeliverableN
FRUCT 10 10 November 2011
Two-Column Slide
FRUCT 10 10 November 2011
Write
Something
Here
Cellular Radio
TrustedWiFi
Internet
Operator Core
Cellular Core Network Elements
PDN-GW
ePDG
S2b
SGi
S2a
IPSec (IKEv2)
3G/WLAN Switching
Dual-InterfaceUE
UntrustedWiFi
PMIPv6 Signalling
Flowchart
FRUCT 10 10 November 2011
Using
QSystemNetworkInfo
Measure Received
Signal Level
:
Connect to 3G
Connect to WLAN
3G is best?
no
yes
Output
:
Best Network
Get 3G Signal
Get WLAN Signal(s)
Using
iwlist scan
Implementation Architecture
FRUCT 10 10 November 2011
Switchers
3G > WLAN
Switcher
WLAN > 3G
Switcher
Monitor
Evaluator
Network Detection
Best Network Selection
Parameter Measurement
3G WLAN Handover
FRUCT 10 10 November 2011
MN
Our WLAN
Network
Mobile
Operator's
Network
GW
Internet
Tunnel works.
No WLAN
3G WLAN Handover
FRUCT 10 10 November 2011
MN
Our WLAN
Network
Mobile
Operator's
Network
GW
Internet
No tunnel.
WLAN
First Results
FRUCT 10 10 November 2011
Header & Object Slide
FRUCT 10 10 November 2011
Results & Further Work
Current Results
[What has been done]
Further Work
[Plans for the future]
FRUCT 10 10 November 2011
Suggested Improvements...
Politely retell what the reviewer said (see section VII of the
paper)
FRUCT 10 10 November 2011
Questions & Answers
Dmitry YuranovOpen Source & Linux Lab,
http://osll.fruct.org, [email protected]
FRUCT 10 10 November 2011
FRUCT 10 10 November 2011
FRUCT 10 10 November 2011
FRUCT 10 10 November 2011
FRUCT 10 10 November 2011
FRUCT 10 10 November 2011
FRUCT 10 10 November 2011
FRUCT 10 10 November 2011
FRUCT 10 10 November 2011
FRUCT 10 10 November 2011
FRUCT 10 10 November 2011
FRUCT 10 10 November 2011
