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Run-Time Software Engineering An approach for Embedded and Ubiquitous

Computing Environments

Run-Time Software Engineering An approach for Embedded and Ubiquitous

Computing Environments

Sooyong Parksypark@sogang.ac.kr

Sogang UniversitySouth Korea

2selab.sogang.ac.kr

Embedded & Ubiquitous Computing EnvironmentEmbedded & Ubiquitous Computing Environment

Computers and information potentially everywhere with our traditional devices : Automobile, TV, Refrigerator, Robot etc Various computing elements are available Heterogeneous universe

Desktops, mainframes, PDAs, Smart appliances Wearable computers Sensors and actuators

Convergence of communications, information, computing, and services

Mobile users

3selab.sogang.ac.kr

Consequences for Software SystemsConsequences for Software Systems

Increasingly, SW systems will need to Be composed of parts built by many organizations

in non-deterministic way Run continuously – need to provide minimum

services Operate in environments where resources and

environments change frequently Be used by mobile users

For such systems, traditional SE approaches – testing, CBD, UML etc- are not enough Exhaustive verification and testing not possible Manual reconfiguration does not scale Off-line repair and enhancement is not an option

4selab.sogang.ac.kr

What has to change ?What has to change ?

SW systems must automatically and optimally adapt and manage to handle Changes in user needs Variable resources Faults User mobility

In short, SW systems must become “ self-adaptable” or “ self-managed”

5selab.sogang.ac.kr

New SE ApproachNew SE Approach

RequirementsAnalysis

Architecture &Design

Implementation

Development Phase

Intention Decision Maker Reconfigurator

Runtime(Operation Phase)

Users’ new need

Observed Information(by Monitor)

System instance

Natural LanguageRequirements

6selab.sogang.ac.kr

Run-Time Software EngieeringRun-Time Software Engieering Run-Time Requirements Analysis

Observe the running system and abstract observed behavior

Analyze new environments or situation based on original requirements

Run-Time Design Determine the cause of constraint violation and choose

a repair strategy in terms of SW architecture Run-Time re-implementation

Adapt new SW components or change the structure of SW without violating run-time environment

Run-Time Testing Continuously check design constraints via explicit run-

time models

7selab.sogang.ac.kr

ConclusionsConclusions

New computing technology require new SW technology

For embedded and ubiquitous computing environment, run-time software engineering technology is proposed

New SW technology is expected to play an important role in the future computing market

Two research initiatives : Run-Time SW technology framework for ubiquitous

environments Alchemist : software framework for self-adaptive

software for intelligent robots