The Improvement and Evaluation of the Implementation Ability for Deriving Timing Constraints Context in Service-Oriented Home Network

다국어 초록 (Multilingual Abstract)

Home Network System (HNS) is comprised of networked home appliances and sensors to provide value-added and more powerful services. In order to build high- level HNS service by integrating multiple appliances and sensors, our earlier study proposes a method to derive timing constraints context based on Sensor Service Framework (SSF, which deploys sensor devices as web services to achieve easy development of context-aware application). That method divides timing constraints into two types: the sequential timing constraint and the continuous timing constraint. A high-level context can be defined as conditions expression based on the above two types. Moreover, we present a timer service to implement timing constraints context within SSF, and demonstrate how a high-level context with timing constraint is registered and detected in a real home network system. However, to create high-level context with timing constraints, the developer needs to know the details about pre-existing context of HNS, and also needs the ability to analyze and implement complex logic to detect a high-level timing constraints context. This limitation impedes the efficient creation of high-level context in HNS. Therefore, we propose a method to collectively manage the information of a pre- existing context of HNS in this paper, by which the developer can create high-level timing constraints context more easily than before. As a case study, we implement Enter-Leave context and TV Left On context, and execute an evaluation to prove the effectiveness of this proposal.

목차 (Table of Contents)

• Abstract
• 1. Introduction
• 2. Preliminaries
• 2.1 Home Network System (HNS)
• 2.2 Sensor Service Framework (SSF)
• 2.3 Timing Constraints Context
• 3. Research Goal and Approach
• 3.1 Issues
• 3.2 Key Idea
• 3.3 ContextRegistry Service
• 3.4 TimingContextSensor Service
• 4. Case Study
• 4.1 Automatic Light Service (Using Sequential Timing Constrains Context)
• 4.2 TV LeftOn Notification Service (Using Continuous Timing Constrains Context)
• 5. Evaluation
• 5.1 Evaluation Method and Environment
• 5.2 Evaluation Result
• 6. Conclusions and Future Work
• 6.1 Conclusions
• 6.2 Future Work
• References