1. Introduction
2. Fundamentals
2.1. WSN Architecture and Constraints
2.2. Ubiquitous Computing Environment
2.3. Context Aware Computing
3. Context Information Distribution
3.1. Context and QoC Definition
3.2. Context Information Distribution in Ubiquitous Environment
3.3. Necessities for Context Information Distribution
4. Classification of Context Information Fusion
4.1. Mechanisms and Algorithms for Context Information Fusion
4.2. Context Information Fusion Architectural Models and Deployments
5. Context Information Fusion Frameworks
6. Research Efforts in Context Information Fusion
7. Conclusion