Transcript WSB 2.03 Release Training

MobiHealth WP3 meeting 12/13 November
2002, Madrid
WSB / MobiHealth
Hugo Geuverink
Agenda
•Scenario nr. 1
•Scenario nr. 2
•Advantages of Wireless Service Broker
•Benefits of WSB / WAP 2.0
•TCP / UDP / W-TCP: advantages / dis-advantages
•Conclusion
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GGSN - WSB configured Connectivity
BT
SGSN
Front-End
Sensor
GPRS/UMTS
AppServer
Internet
GGSN
MBU
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Firewall
VPN
Firewall
Wireless
Service
Broker™
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GGSN - WSB configured Connectivity
Subscriber DB.
Authorization
Authentication
G
G
S
N
TCP/IP (IP nr client)
Radius info MSISDN + Username + Password
R
A
D
I
U
S
D
W
S
B
Fix IP nr
Fix IP nr
GGSN
WSB
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Advantages GSN - WSB configured Connectivity
•Use of VPN infrastructure
• Easier to achieve
• Cheaper to achieve
• Easier to maintain
•Radius Forwarding accounting
•Easier and more secure Authentication
•Separation of different operators subnets by Virtual GW’s
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Disadvantages GGSN - WSB configured Connectivity
•Operators have to accept (Operator dependent solution)
•Wan’t work in visited networks
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Agenda
•Scenario nr. 1
•Scenario nr. 2
•Advantages of Wireless Service Broker
•Benefits of WSB / WAP 2.0
•TCP / UDP / W-TCP: advantages / dis-advantages
•Conclusion
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NO GGSN - WSB configured Connectivity
BT
Internet
Front-End
Sensor
GPRS/UMTS
AppServer
Firewall
Wireless
Service
Broker™
at
Hospital
side
MBU
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Surrogate Host / WSB
Data
Repository
Surrogate
Host
Secure
HTTP
Wireless
Service
Broker
HTTP
Secure
Firewall
Surrogate
Jini Lookup
Service
MBU
MobiHealth domain
E-Health domain
End User
Application
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Radius info from Hospital
Subscriber DB.
Authorization
Authentication
W
S
B
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R
A
D
I
U
S
D
Radius info MSISDN + Username + Password from Hospital
H
O
S
P
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Advantages NO GGSN - WSB configured Connectivity
•End to End security
•Radius info will be get from Hospital and MBU
• No radius forwarding
•Global solution => Non operator independent
• Only roaming agreement needed
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Disadvantages NO GGSN - WSB configured Connectivity
•No Radius forwarding => only Proxy authentication
•Athentication more complex
•No added-value from operators
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Advantages WSB / Surrogate Host, Hospital side
• Central Authentication / Authorization (Patient, Doctor…)
• Maintain Subscriber DB
• Hospital by Virtual gateway and seperate DB
• Radius info from Hospital
- MSISDN
- Username
- Password
• Firewall function for Internet Traffic
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Disadvantages WSB / Surrogate Host, Hospital side
•No Radius info from Operator
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Advantages MBU / WSB
•W-TCP protocol
•Secure HTTP
• Application level security
• Only body encrypted
• Information in Header usable
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Disadvantages MBU / WSB
•WSB has to ask MBU for Username/Password for
authentication and authorization
•Username / Password maintenance
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Agenda
•Scenario nr. 1
•Scenario nr. 2
•Advantages of Wireless Service Broker
•Benefits of WSB / WAP 2.0
•TCP / UDP / W-TCP: advantages / dis-advantages
•Conclusion
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Advantages of the Wireless Service Broker (1)
•Optimized connection between BAN, WSB and Hospital
• Wireless TCP
• Cost saving for subscriber (patient)
•Central Authentication and Authorization
•Broker management facility
• Statistics
• Services
• Profiles
• Differentiation over Billing (Hospital / Insurance company / Patient)
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Advantages of the Wireless Service Broker (2)
•Push capability
•Surrogate Host => MBU
• Activate when MBU in sleep mode
• Deliver control information when device available
• Device always reachable
• Push over IP, when no connection, Session Initiation Request
• Support of all Bearers
•Surrogate Host => Doctor (notification message)
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Advantages of the Wireless Service Broker (3)
•Out of coverage (WAP standard)
• PPG stored data (control information) until MBU is alive
• PPG = Push Proxy Gateway
•Firewall function for Internet traffic
•Maintain Subscriber DB by Virtual Gateway
•Replication of solution possible on same platform via
Virtual Gateway’s
•Scalability
•WAP 2.0 Standard
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Agenda
•Scenario nr. 1
•Scenario nr. 2
•Advantages of Wireless Service Broker
•Benefits of WSB / WAP 2.0
•TCP / UDP / W-TCP: advantages / dis-advantages
•Conclusion
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Benefits of WSB / WAP 2.0
•Update of WAP to be 3G-ready
•W-TCP instead of UDP / TCP
•No protocol conversion in WAP 2.0 (better security)
•End to End security (secure HTTP) in both ways !
•Richer mark-up languages tailored for mobiles, with
improved support for:
• Color
• Image formats, including color images
• Style sheets
• Important when status request from Content server > Patient
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Agenda
•Scenario nr. 1
•Scenario nr. 2 (proposal)
•Advantages of Wireless Service Broker
•Benefits of WSB / WAP 2.0
•TCP / UDP / W-TCP advantages / dis-advantages
•Conclusion
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TCP advantages / disadvantages
•Advantages:
•Reliable, all data will be send
•Data packages in right order
•Disadvantages:
•Bad performance due to resending mechanisme
• Whole window will be send again
•Slow initial congestion
• Influence of network behaviour
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UDP advantages / disadvantages
• Advantages:
• Better performance
• Disadvantages:
• Not Reliable, not all data will be received
• One or more packages (even >50%) of data could be lost
• Create retry mechanisme
• Packages received in different order
• Create mechanisme to set packages in right order
• WAP 1.x standard
• Influence of network behaviour
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W-TCP advantages / disadvantages
• Advantages:
• Reliable
• Retry mechanisme, only lost packages will be send again
• Initial congestion better by configuration of parameter cwnd
• Better performance then TCP
• Wireless Serice Broker support W-TCP
• MBU (Linux) support W-TCP
• WAP 2.0 standard
• Disadvantages:
• Influence of network behaviour
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Agenda
•Scenario nr. 1
•Scenario nr. 2 (proposal)
•Advantages of Wireless Service Broker
•Benefits of WSB / WAP 2.0
•TCP / UDP / W-TCP advantages / dis-advantages
•Conclusion
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Conclusion
• Proposal CMG
• Scenario 2 (WSB at Hospital side, no GGSN – WSB configuration,
W-TCP and secure HTTP)
• Central Authorisation / Authentication
• Push Capability
• Maintain subscriber DB by Virtual Gateway
• Replication on same platform via Virtual Gateway
• Global solution
- No radius info from operator
- No configuration at GGSN
• Firewall function Internet traffic
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QUESTIONS ?
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