Transcript Interworked WiMAX-3G Cellular Data Networks: An Architecture for

Interworked WiMAX-3G Cellular Data Networks:
Company
AnLOGO
Architecture for Mobility Management and
Performance Evaluation
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS,
VOL. 8, NO. 4, APRIL 2009
Kumudu S. Munasinghe, Student Member, IEEE, and Abbas
Jamalipour, Fellow, IEEE
指導教授： 童曉儒 教授
學生：許益晨
Outline
Introduction
IMS Based Session Management
WiMAX-3G Cellular Interworking
Performance Modeling
Numerical Results and Analysis
Conclusions and Future Work
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Introduction
Mobile WiMAX networks are still in its infancy with
many technical challenges lying ahead.

The lack of an infrastructure for the WiMAX Core Network (CN).
If mobile WiMAX is interworked with the already
well established 3G cellular networks, that it may
become an essential partner of the future 4G networks.
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Introduction
Mobile IP (MIP) has been exploited as the mobility
management mechanism in most of these designs.
The primary focus of this paper is to introduce novel
architecture and investigate various performance
measures such as
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vertical handoff delay
transient packet loss
jitter
signaling cost relating to vertical handoff management.
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IMS Based Session Management
The IP Multimedia Subsystem (IMS) is an
architectural framework for delivering Internet
Protocol (IP) multimedia services.
The user can connect to an IMS network in various
ways, most of which use the standard Internet
Protocol (IP).
When roaming , they can use IP and run Session
Initiation Protocol (SIP) user agents
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IMS Based Session Management
Radio Access Network
Core Network
PDN or PSTN
IP Multimedia Subsystem (IMS)
GERAN
SGSN
Application Servers (ASs)
GGSN
MS
Game
UTRAN
IMPS
Download
DRM
SIP
Server
HSS/HLR
Call Session Control Functions
(CSCFs)
UE
P-CSCF
AAA Server
S-CSCF
RTP
Proxy
BGCF
Packet Data Gateway
(PDG)
SIP UA
I-CSCF
CSP
802.11
WLAN
MS
NTP VoIP Platform
SIP
Analyzer
PSTN Gateway
CGW
802.16
WiMAX
PSTNs
SS
使用者設備(User Equipment)
無線網路存取網路(Radio Access Network
核心網路(Core Network)
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IMS Based Session Management
Proxy-CSCF (P-CSCF) is a SIP proxy that is the first point of
contact for the IMS terminal.
Serving-CSCF (S-CSCF) is the central node of the signalling
plane. It uses Diameter Cx and Dx interfaces to the HSS to
download and upload user profiles — it has no local storage of
the user. All necessary information is loaded from the HSS.
Interrogating-CSCF (I-CSCF) is another SIP function located
at the edge of an administrative domain. Its IP address is
published in the Domain Name System (DNS) of the domain , so
that remote servers can find it, and use it as a forwarding point
(e.g. registering) for SIP packets to this domain.
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IMS Based Session Management
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WiMAX-3G Cellular Interworking
A. Architectural Considerations
Design will be primarily based on MIPv4
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3GPP2’s IMS does not fully support inter-Packet Data
Switching Node(PDSN) mobility for IPv6.
Eliminates the complexity of managing two IP addresses
and enables IP mobility management transparently to the
layers above.
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WiMAX-3G Cellular Interworking
B. Interworking Architecture
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Performance Modeling
A.Handoff Delay Analysis
 A standard vertical handoff during mid-session mobility
comprises of:
D1 = link layer handoff delay
D2 = movement detection delay
D3 = address allocation delay
D4 = session re-configuration delay
D5 = packet re-transmission delay
D4 = Dw1 + Dw + Lw1 + Lw
Dwl : total delay at the wireless
Dw :total delay at the wired link
Lwl :latency of the wireless link
Lw :latency of the wired link.
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Performance Modeling
A.Handoff Delay Analysis
 M/M/1 queuing model has been applied to the wireless BS
Dwl = 1/(μwl − λwl)
Dwl = 1/(μCi − λwl) [channel i]
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Performance Modeling
A.Handoff Delay Analysis
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Performance Modeling
B. Packet Loss Analysis
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Performance Modeling
C. Signaling Cost Analysis
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P is the probability that each handoff will occur
S is the average size of a signaling message
Ha−b is the average number of hops between a and b
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Performance Modeling
C. Signaling Cost Analysis
P , the session arrival probability for an internetwork roaming MN between t and t
1
0
η is the network mobility rate
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2
Performance Modeling
C. Signaling Cost Analysis
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Performance Modeling
C. Signaling Cost Analysis
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Numerical Results and Analysis
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Numerical Results and Analysis
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Numerical Results and Analysis
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Numerical Results and Analysis
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Numerical Results and Analysis
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Conclusions and Future Work
A novel internetworking architecture for WiMAX
and 3G Cellular networks and a detailed
evaluation on its performance was presented.
Future works will concentrate on developing a
common AAA framework and facilitating multiple
network accessing.
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