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Network-Centric Architecture for Context-Aware Information Delivery Services in 3G Mobile Networks. Eiji Kamioka 1 , Shigeki Yamada 1 and Takako Sanda 2 1 National Institute of Informatics 2 The Graduate University for Advanced Studies - PowerPoint PPT Presentation
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Network-Centric Architecture for Context-Aware Information Delivery Services in 3G Mobile
Networks
Eiji Kamioka1, Shigeki Yamada1 and Takako Sanda2
1National Institute of Informatics2The Graduate University for Advanced Studies
E-mail: 1{kamioka, shigeki}@nii.ac.jp, [email protected]
IntroductionUbiquitous Computing
UbiquityInvisibility --- Context Awareness
Context-Aware ComputingContext-aware information delivery services
• At Any time and anywhere• From LAN to WAN• From indoor to outdoor• From stationary to mobile environments
CAIDS: Context-Aware Information Delivery System
Context-Aware Service Scenarios
Tour guide in Paris
I want to visit the Eiffel Tower!How can I get there?
Personal communication service
----------- Context -----------Location: on an airplaneActivity status: sleepingAvailable device: headset
Functional Requirements of Context-Aware Services
Context-AwarenessCaptures and updates user’s contextThe captured context is stored in a context databaseDeals with frequent changes and reuse of the context.
Information BindingAnalyzes and interprets the contextBinds the context to the content
Information ProvisionConverts the media content into one adapted to the receiver’s communication environment, if necessary.Delivers the (converted) content to the receiver at the right time in the right way
Context
Content
binding
System ArchitectureFunction Modules
UIN (Universal Information delivery Navigator)DA (Directory Agent)UMD (User Management Database)MPS (Media Processing Server)
UIN
UMD
DA
MPS
MT
Content Server
context
authentication
Query of content discovery
Location of content server
content
Query of download
Conversionif necessary
MT: Mobile Terminal
WLAN
MT R
ISP network
AP
PS-CNRNCBSMT
IMS
I-CSCF
SGSNUTRAN
P-CSCF
HSS
GGSN
T-SGWS-CSCF
MGCF MGW
R
Internet PSTN/ISDN
UMTS Release 5
WLAN
UMTS Release 5 Architecture Integrated with WLAN
Access Network for CAIDS
Communication Receiver
Communication Sender
CAIDSUser
Content Server
EAPEC
CAIDS
Network
Network
Communication Context
User Context
MediaMedia
ContentsContents
AnalysisAdaptationConversion
AnalysisAdaptationConversion
Comparison between CAIDS and EAPEC
PS-CN
RNCBSMT
IMS
SGSN
UTRAN
WLAN
MT R
ISP network
AP
Content Server
InternetLAN
P-CSCF
R
I-CSCF S-CSCF
UMD
MPS
DA
CAIDS
(1)
(2)
(3)
(7)
[5,10]
(4,9)
[6](8)
(11)
[12]
[13]
[14][15]
[16]
UIN
CAIDS Architecture with Access Network
GGSN
RHSS
User information is managed by the UMD through GGSN
I-CSCF S-CSCFMT UMDUIN DAP-CSCF
REGISTER
REGISTER
REGISTER
OKOKOK
Content Server
HTTP GETHTTP OK (download)
(1) (2)
(3)(4)[5]
[6]
(7)
(8)(9)[10]
(11)[12]
[13]
[14][15][16]
Authentication+
Get S-CSCF
Refer toUMD
+Get location of content server
Response time
Information Flow in CAIDS
SIP SIP
SIP
SIPSIPSIP
SLP
SLP
Based on the 3GPP specification
Parameters Traffic Distribution
Values for Calculation and Simulation
Wireless-Released Delay either in MT, UTRAN and PS-CN or in MT, WLAN and ISP network
Normal Distribution
10 ms, as an average3 ms, as an standard deviation
IP Network Delay in the IMS Normal Distribution
10 and 20 ms, as averages3 and 4 ms, as standard deviations
Processing Time in Application Servers
Exponential Distribution
10 and 50 ms per IP packet
Utilization of Application Server Constant From 0.1 to 0.9 with the interval of 0.1
IP Packet Arrival Rate Poisson Distribution
Arrival rates are determined so as to satisfy the specific utilizations of application servers
Processing Time in MT Constant 10 ms
Performance ModelParameters Values for Calculating and Simulating the Response Times
0.0
0.5
1.0
1.5
2.0
2.5
0 0.2 0.4 0.6 0.8 1
Server utilization
Res
pons
e tim
e [s
]
Mean values (ND=10ms, PT=10ms)95th percentiles (ND=10ms, PT=10ms)Mean values (ND=20ms, PT=10ms)95th percentiles (ND=20ms, PT=10ms)
Response time under server processing time of 10ms and network delays of 10ms and 20ms
[ND]: Network Delay (ms)[PT]: processing time (ms) 0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
0 0.2 0.4 0.6 0.8 1
Server utilization
Res
pons
e tim
e [s
]Mean values (ND=10ms, PT=50ms)95th percentiles (ND=10ms, PT=50ms)Mean values (ND=20ms, PT=50ms)95th percentiles (ND=20ms, PT=50ms)
Response time under server processing time of 50ms and network delays of 10ms and 20ms
Performance Results and Analysis