doc.: ieee 802.11-06/0126r0 submission january 2006 yeong m. jang, kookmin university, koreaslide 1...
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January 2006
Yeong M. Jang, Kookmin University, KoreaSlide 1
doc.: IEEE 802.11-06/0126r0
Submission
Parameters for Network Selection Algorithm under Heterogeneous Network Environments
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Date: 2006-01-19
Name Company Address Phone email Young M. Woo Kookmin University Seoul, Korea +82 2 910 5068 [email protected]
Hyun M. Park Kookmin University Seoul, Korea +82 2 910 5068
Yeong M. Jang Kookmin University Seoul, Korea +82 2 910 4827 [email protected]
Won T. Kim ETRI Daejeon, Korea
Do H. Kim ETRI Daejeon, Korea
Sun J. Kim ETRI Daejeon, Korea
Authors:
January 2006
Yeong M. Jang, Kookmin University, KoreaSlide 2
doc.: IEEE 802.11-06/0126r0
Submission
Contents
• Interworking Architecture in Heterogeneous Networks
• Handoff Procedure in Networks
• Network Selection Algorithm
• Summary
January 2006
Yeong M. Jang, Kookmin University, KoreaSlide 3
doc.: IEEE 802.11-06/0126r0
Submission
Interworking Architecture in Heterogeneous Networks
CDMA
Internet
BS
AP
RAS
WiBro
WLAN_0 WLAN_1
Access router Access
router
Access router
AP
January 2006
Yeong M. Jang, Kookmin University, KoreaSlide 4
doc.: IEEE 802.11-06/0126r0
Submission
Interworking Architecture in Heterogeneous Networks
• Characteristics:
Characteristics3G Cellular
Network
(1X EV-DO)
WLAN
(802.11a/b/g)
WMAN
(802.16/e)
Data Rate2.4Mbps/
153.6Kbps~54Mbps 24Mbps/6Mbps
Range Several km 50~100m Several km
MobilityOver several tens
km/hBelow 30~40km/h About 60 km/h
January 2006
Yeong M. Jang, Kookmin University, KoreaSlide 5
doc.: IEEE 802.11-06/0126r0
Submission
Handoff Procedure in Networks
MIH_Info.Request
L3 Protocol(MIPv4/MIPv6)
MIHMAC
1MAC
2MAC MIH
Old AR/FAWith MIHF
MAC MIHNew AR/FAWith MIHF
Steady state connection between MT and Network XObtain Neighbor Reports and Network Information
Network Selection Algorithm
Information RequestMIH_Info.Indication
MIH_Info.ResponseInformation Response
MIH_Info.Confirm
Query List of Available Networks
Response List of Available Networks
Query More Info on 802.y Networks
Response Info on 802.y Networks
Link Detected
Link Going Down
IP Information Request
Access Procedure to Network Y
Mobile TerminalNetwork X
(old)Network Y
(new)Information
Server
January 2006
Yeong M. Jang, Kookmin University, KoreaSlide 6
doc.: IEEE 802.11-06/0126r0
Submission
Network Selection Algorithm
Steady state
Measure RSS
Calculating average RSS
RSS_other > RSS_current + HYS
RSS_current < RSS_thresold
CAC
Network Selection Algorithm
CDMA Network
RSSHYSCAC
Received Signal strength HyseresisCall Admission Control
Yes
No
Yes
Yes Yes
No
January 2006
Yeong M. Jang, Kookmin University, KoreaSlide 7
doc.: IEEE 802.11-06/0126r0
Submission
Network Selection Algorithm
• Use average RSS with window size– Window size depends on speed of mobile station
• Choose available network– Chose network which exceed current RSS by Hys RSS
• Execute network selection algorithm– Considering service class, QoS parameters, speed of mobile station, and etc.
January 2006
Yeong M. Jang, Kookmin University, KoreaSlide 8
doc.: IEEE 802.11-06/0126r0
Submission
• Hysteresis value depends on speed of mobile station – Enable to prevent entry to the sensitive network
– Prevent ping-pong situation
Speed(m/s)Slowest Slow Normal Fast Fastest
Lowest HYS
Low HYS
MiddleHYS
High HYS
Highest HYS
Network Selection Algorithm
January 2006
Yeong M. Jang, Kookmin University, KoreaSlide 9
doc.: IEEE 802.11-06/0126r0
Submission
• Window size depends on speed of mobile station – Prevent Mobile station to skip available network
– Prompt entry to the suitable network
Speed of mobile station [km/h]
0 ~ 30 30 ~ 80 80 ~
Traditional network selection algorithm
Constant Constant Constant
Proposed network selection algorithm
High Middle Low
Network Selection Algorithm
January 2006
Yeong M. Jang, Kookmin University, KoreaSlide 10
doc.: IEEE 802.11-06/0126r0
Submission
Class Throughput Delay BER Security Cost RSS
Conversational 5 6 1 4 3 2
Streaming 6 5 4 3 2 1
Interactive 2 3 5 4 6 1
Background 4 1 6 3 5 2
• Service class and QoS Parameters– RSS, Throughput, Delay, BER, Security, Cost, etc.
• Weighting according to service class
Network Selection Algorithm
January 2006
Yeong M. Jang, Kookmin University, KoreaSlide 11
doc.: IEEE 802.11-06/0126r0
Submission
• Traditional Network Selection Algorithm– RSS priority
– Static window size
– Static hysteresis value
• Proposed Network Selection Algorithm– Considering QoS parameters
– Weighting QoS parameters respectively according to service class
– Dynamic window size depending on speed of mobile station
– Dynamic hysteresis value
Network Selection Algorithm
January 2006
Yeong M. Jang, Kookmin University, KoreaSlide 12
doc.: IEEE 802.11-06/0126r0
Submission
• Selecting the most suitable network– QoS parameter weight of Service class QoS parameter value of available
networks
– Selected network is the network having the best value
×
Network Selection Algorithm
January 2006
Yeong M. Jang, Kookmin University, KoreaSlide 13
doc.: IEEE 802.11-06/0126r0
Submission
Summary
• There are many QoS parameters for network selection– RSS, Throughput, Delay, BER, Security, Cost, etc.
• Discriminative weighting according to service class– Enable to customize user preference
• Window size depend on speed of mobile station• Hysteresis value depends on speed of mobile station• Method to satisfy user’s QoS• Mobile station should support multi-Protocol