Presentation ECSA
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This document presents research on evaluating the architectural openness of mobile software platforms. It introduces the topic, defines key terms, and outlines the research questions and scope. The methodology involves a literature review and qualitative interviews with developers. Results include an architectural openness model with factors, and an analysis of openness in five major platforms (Android, Symbian, Windows Mobile, Blackberry, iPhone). The model shows how platform strategies affect architecture and accessibility. Interviews validated conclusions but found developers care more about functionality than openness. Further interviews with manufacturers are recommended.
Presentation ECSA
- 1. Mohsen Anvaari Slinger Jansen Evaluating Architectural Openness in Mobile Software Platforms 2nd Workshop on Software Ecoystems Copenhagen August 23th, 2010
- 2. 2 Agenda Subject and Problem Area Some Definitions Research Questions Research Scope Related Research Methodology Results Conclusions Questions
- 3. 3 Subject and Problem Area Openness in Software Systems and Projects Mobile Software Platforms Openness Strategy, Platform Architecture, Platform Accessibility Evaluating Architectural Openness in Mobile Software Platforms
- 4. 4 Some Definitions Openness: Degree of accessibility to view, use, and modify a software code Openness strategy: Openness degree of a platform settled by the platform supplier Platform architecture: Structure of the software platform compromises its components and the relationship between them (Bass et. al, 2003) Platform accessibility: Methods and points that developers can use to extend or modify a platform
- 5. 5 Research Questions RQ: How does the software architecture expose the openness strategy of mobile software platforms? SQ1: Can a model be developed that describes the architectural openness of mobile platforms? SQ2: How would the licensing aspects of the platforms relate to such a model? SQ3: How open are the five main mobile platforms?
- 7. Related Researches Few attempts have been made to demonstrate the comparison of smartphone OSs (Lin and Ye, 2009) Lin and Ye, 2009: comparison of four main mobile platforms and their openness, based on non-technical aspects Cho and Joen, 2007: Openness and architecture of three platforms, a connection is not included Yamakami, 2009: Comparison of four main mobile platforms, based on non-technical aspects 7
- 8. 8 Methodology Literature review: Finding the relationship between openness strategies and the software architecture of mobile platforms Qualitative interviews with mobile application developers: Verify the platform accessibility in the five main platforms that allows application developers to extend the platforms
- 9. 9 Results Architectural Openness Model Architectural Openness Factors Openness in Five Main Mobile Platforms
- 10. 10 Results: Architectural Openness Model Applications Middleware Kernel Extended ApplicationsNative Applications App 1 App 2 App 3 App N... (Services, Libraries, Frameworks ) (Device Drivers, Memory Management, Power Management, Security ) App 1 App 2 App 3 App M... Platform Architecture Symbian Architecture Android Architecture + Platform Accessibility Integrate Extend Modify Integrate Extend Modify Integrate Extend Modify Integrate Extend Modify Architecture (Cho and Jeon, 2007) iPhone Architecture
- 11. Results: Architectural Openness Factors Layer Factor Possibility statuses If possibleLicensing statuses Extended applications Integrate extended applications Possible/ Possible for some components/ Not possible Permission is not needed/ In some situation permission is needed/ Permission is always needed Extend extended applications Modify extended applications Native applications Integrate native applications Extend native applications Modify extended applications Middleware Integrate middleware Extend middleware Modify middleware Kernel Integrate kernel Extend kernel Modify kernel
- 12. Comparison Factor Android Symbian Windows Mobile Blackberry iPhone P L P L P L P L P L Integrate extended applications Extend extended applications Modify extended applications Integrate native applications Extend native applications Modify native applications Integrate middleware Extend middleware Modify middleware Integrate kernel Extend kernel Modify kernel P - Possibility: Possible (G), Possible for Some Components (Y), Not Possible (Red) L - Licensing: Permission is Not Needed(G), Sometimes Permission is Needed(Yellow), Permission is Always Needed(R)
- 13. 13 Conclusions Proposed architectural openness model shows how the openness strategies of mobile platform suppliers affect the software architecture of the platforms Proposed architectural openness factors shows how open the mobile software platforms are Based on the model and the factors, the openness degree of five main mobile platforms is indentified Qualitative interviews validate the previous conclusion Interviews show application developers dont care about architectural openness of their favorite platforms Interview with Some Device Manufacturers, and Mobile Suppliers is recommended
- 14. 14 Questions