1. Model-based Management of Embedded Service Systems - An Applied Approach
S. Illner, I. Lück, A. Pohl & H. Krumm
A. Bobek, H. Bohn & F. Golatowski

2. Model-based management MoBaSeC
Outline
Introduction
Model-based management
MoBaSeC
Designtime modeling
Runtime enforcement
Demonstrator
Components & Implementation
Concluding remarks
Management of Embedded Service Systems - Andre Pohl
20/09/2018

3. Embedded service systems, SOA
Introduction
Embedded service systems, SOA
Industrial sensors and actuators
Mobile devices
SIRENA project
UPnP, DPWS (WSD)
Context-awareness & adaptability
Challenge: Low power, CPU and memory constraints
 Approach: Two-phase management
Management of Embedded Service Systems - Andre Pohl
20/09/2018

4. Tool-assisted graphical modeling of context-aware polices
Two-Phase Management
Tool-assisted graphical
modeling of context-aware polices
Automated & adaptive
runtime management
Configuration
Management of Embedded Service Systems - Andre Pohl
20/09/2018

5. Model-based Management
Object instance diagram of hosts, services, etc.
Nodes represent real-world entities, edges express relationships
Building of policy-hierarchies:
Starting with abstract, high-level policy
Stepwise refinement, tool-assisted, partly automated (via graph transformation)
Output: low-level policy based on high-level policy
Management of Embedded Service Systems - Andre Pohl
20/09/2018

6. Model-based Management: Policy hierarchy
Corporate management Corporate Policy: All systems should always use the latest available software version.
Technical Management Functional Policy: New software versions are to be distributed in 5 hours. Process Policy: check all 10 min: if sw in Repos where sw.v>mo.v then { distribute(sw); install(sw) } Object, Attributes & Rules: if inqueue.lng>c1 then reduce_credit
Management of Embedded Service Systems - Andre Pohl
20/09/2018

7. Model-based Management (cont‘d)
Goals
System
Control
Model
Modeling
Abstraction
Refinement
Abstraction
Refinement
Modeling
Generation
Real System
Tool-Support
1. Modeling of system and goals
2. Abstraction: More abstract models
3. Derivation of control elements
Management of Embedded Service Systems - Andre Pohl
20/09/2018

8. Replacement rule Graph transformation ftp avr d1 d2 n1 n2 s:Service
v:AvailReq
ftp
avr
d:Daemon d2
wd2
pc2
s:Service
v:AvailReq d1
wd1
pc1 n2
d:Daemon
w:WatchD
p:CheckP n1
Management of Embedded Service Systems - Andre Pohl
20/09/2018

9. MoBaSeC Model-based Service Configuration
Graphical model representation
Interactive modeling
Interactive model abstraction & refinement
Automated completion, analysis & check
Generation of low-level management parameters
Management of Embedded Service Systems - Andre Pohl
20/09/2018

10. Runtime policy enforcement infrastructure
MoBaSeC (cont’d)
Runtime policy enforcement infrastructure
Lightweight Java services
Based on Service Abstraction Layer
UPnP module implemented
DPWS planned
Management of Embedded Service Systems - Andre Pohl
20/09/2018

11. Automotive Demonstrator
LAN
USB
CAN
WLAN
Bluetooth
GSM
DAB
GPS
Management of Embedded Service Systems - Andre Pohl
20/09/2018

12. Automotive Demonstrator (cont’d) Child Safety Seat Scenario
Goal: Turn off the airbag if a child safety seat is placed on the front seat
Child safety seat with Bluetooth tag
Bluetooth-Id scanner to detect seat
Airbag device service
Policy enforcement services
Designtime policy modeling & deployment
Management of Embedded Service Systems - Andre Pohl
20/09/2018

13. Demonstrator: Airbag Deactivation Model
Management of Embedded Service Systems - Andre Pohl
20/09/2018

14. Two-phase management approach for embedded service systems
Concluding Remarks
Two-phase management approach for embedded service systems
Designtime modeling & runtime enforcement
Successfully tested in the automotive demonstrator
More complex tests have to be conducted
Service abstraction platform
UPnP based communication
Implementation of a DPWS stack for embedded Java platforms finished
Abstraction layer integration pending
(Fault) Management Patterns  assist in creating fault tolerant service systems
Management of Embedded Service Systems - Andre Pohl
20/09/2018

15. Thank you for your attention!
Management of Embedded Service Systems - Andre Pohl
20/09/2018