Fast and Efficient Context-Aware Services

Abbreviations.

1. Introduction.

1.1. Context-Aware Services.

1.2. The Context Project.

1.3. Structure of the Book.

1.4. Acknowledgements.

2. Context Awareness and Modeling: Background.

2.1. Some Context Definitions.

2.2. Context-Aware Service.

2.3. Context-Awareness System Research.

2.3.1. Context-Aware Ubiquitous Computing Applications.

2.3.2. Context-Aware Frameworks.

2.3.3. Context-Aware Application Life Cycle.

2.3.4. Context in GRID Computing.

2.3.5. Context-Aware Sensors’ Computing.

2.3.6. Context-Aware Ontologies.

2.3.7. Context in Mobile Systems and Devices.

2.3.8. Context Aware Communications.

2.3.9. Context-Aware Flows.

References.

3. The Service Life Cycle Functional Architecture.

3.1. Introduction.

3.2. Service Life Cycle Model for Context-Aware Services.

3.3. Service Creation.

3.3.1. CAS Authoring.

3.3.2. Service Customization.

3.3.3. Code and Policies Generation Engine.

3.4. Service Management.

3.4.1. Code Distributor.

3.4.2. Code Execution Controller.

3.4.3. Invocation Service Listener.

3.4.4. Service Assurance.

3.5. Conclusions.

References.

4. Context-Aware Services and the Network Layer.

4.1. Network Layer Requirements for Context-Aware Services.

4.2. Current State of Service-Aware Networks and Open Network Interfaces.

4.3. Requirements for Network Context Information Collection and Dissemination.

4.3.1. Access to Local Network Level Information.

4.3.2. Gathering and Disseminating Global Network Information.

4.4. Requirements for Network Level Control.

4.5. Security Considerations.

4.5.1. Implementation Aspects.

4.6. Conclusions.

References.

5. Baseline Technology Review.

5.1. Introduction.

5.2. Open Signaling Approach.

5.3. IFTF ForCES Approach.

5.4. DARPA Active Networks Approach.

5.5. Programmable Networks Components.

5.5.1. Node OS: Node Operating Systems.

5.5.2. EE: Execution Environments.

5.5.3. Programmable Management Services.

References.

6. CAS Creation and Management – System Architecture and Design Considerations.

6.1. Introduction.

6.2. Service Layer Overview.

6.2.1. Policy Management Components.

6.2.2. Service Execution Components.

6.2.3. Interfaces Between Service Layer Components.

6.3. Service Layer Implementation Considerations.

6.3.1. Why Policies?

6.3.2. Objectives of the Policy-Based Service Management System.

6.4. Context Policy-Based Service Management System.

6.4.1. On System Components.

6.4.2. Domain-Specific Policies.

6.4.3. Service Assurance.

References.

7. The Service Execution Environment and Context Delivery.

7.1. A Bird’s-Eye View.

7.2. The Active Platform.

7.2.1. The Session Broker.

7.2.2. Execution Environment.

7.2.3. Management of Active Nodes.

7.2.4. DINA Active Packets.

7.2.5. Security.

7.2.6. The IP-Related Brokers.

7.2.7. VoIP Support: the SIP Broker.

7.2.8. Wireless Support: The WLAN Broker.

7.3. Context Delivery System.

7.3.1. Functional Overview.

7.3.2. Functional Decomposition.

7.3.3. Context Broker Interfaces.

7.4. Conclusions.

References 167

8. System Evaluation.

8.1. The Scenarios.

8.1.1. Work From Anywhere (WFA).

8.1.2. Crisis-Aware Telecommunications Services.

8.1.3. Moving Campus Services.

8.1.4. Testbed and Service Layer Set Up.

8.2. Performance Evaluation.

8.2.1. CPU Load.

8.2.2. Info-Broker Load.

8.3. Conclusions.

9. Conclusions.

9.1. Context-Aware Services.

9.2. Autonomic Communications Vision.

References.

Index.