| 5 | | The Check Management Protocol Suite is an innovation that was carried out by UPB in WP4, and it contains contributions from the simple reprogramming, management, task-scheduling and self-healing components. Check offers a monitoring and actuation framework for heterogeneous WSAN islands crossing the borders of different organisations with different network setups, which will work toward the realization of the scalable internetworking, horizontalization and heterogeneity design goals of the SENSEI System. The monitoring of all the components of Environmental Sensor Networks (ESN), Community Sensor Networks (CSN), and Body Sensor Networks (BSN), such as load, link quality, processor and radio usage on the nodes, as well as enabling actuation in these networks, is not yet fully solved in a fully heterogeneous environment. The Check Suite addresses this point by implementing multi-hop task-scheduling algorithms, based on multi-hop routing schemes for homogeneous wireless sensor networks. In WSANs, packets are typically forwarded in first-come first-served order. However, this scheduling does not work well in real-time networks where packets have different end-to-end deadlines and distance constraints. The multi-hop task-scheduling scheme from the Check framework needs topology information from the network, which will be gathered using network discovery algorithms. Task-scheduling is a fundamental requirement for various subsystems of WSAN islands. It can be used, for example, in the smart places scenario to reschedule the appointments at the post office or the shopping mall, and in the worker in a plant to enable the parallel execution of tasks and to prevent workers from performing conflicting operations. Present research on scheduling is generally focused on hard time deadlines. Instead, the Scheduling component of the Check Suite proposes a solution where energy consumption, battery awareness, availability and affinity are considered as more important than execution time. The last component provided by the Check Management Protocol Suite is the availability of a high-level, service-oriented self-healing strategy. Here the WSAN is regarded here as a service provider. Check thus offers a high-level framework for assuring service availability in WSANs. Whenever a component of a WSAN island fails, it is of paramount importance that the functionality it provides is not lost, to ensure the availability and reliability of the services being offered. Check Self-Healing is the SENSEI component providing the recovery strategies employed when these events occur. Services can be allocated to nodes by the Check-Scheduling component of the Check Suite. The self-healing component identifies failing or poorly performing services and signals and orders the scheduler to reallocate them or reallocates them itself and configures the nodes directly. The self-healing algorithms can manage multiple WSAN islands through the Check – Monitoring and Reconfiguration management component, and can thus move services in heterogeneous WSAN islands if data dependencies allow it. It must also be noted that this coupling of the Self-Healing and Monitoring components, by being able to gather information from a wide variety of devices, using many operating systems and offering numerous services, will provide a hardware- and operating system-independent mechanism for service-level self-healing in the SENSEI system. |
| | 5 | The Check Management Protocol Suite is an innovation that was carried out by UPB in WP4, and it contains components for simple reprogramming, management, task-scheduling and self-healing. Check offers a monitoring and actuation framework for heterogeneous WSAN islands crossing the borders of different organizations with different network setups, which will work toward the realization of the scalable internetworking, horizontalization and heterogeneity design goals of the SENSEI System. The monitoring of all the components of Environmental Sensor Networks (ESN), Community Sensor Networks (CSN), and Body Sensor Networks (BSN), such as load, link quality, processor and radio usage on the nodes, as well as enabling actuation in these networks, is not yet fully solved in a fully heterogeneous environment. The Check Suite addresses this point by implementing multi-hop task-scheduling algorithms, based on multi-hop routing schemes for homogeneous wireless sensor networks. In WSANs, packets are typically forwarded in first-come first-served order. However, this scheduling does not work well in real-time networks where packets have different end-to-end deadlines and distance constraints. The multi-hop task-scheduling scheme from the Check framework needs topology information from the network, which will be gathered using network discovery algorithms. Task-scheduling is a fundamental requirement for various subsystems of WSAN islands. It can be used, for example, in the smart places scenario to reschedule the appointments at the post office or the shopping mall, and in the worker in a plant to enable the parallel execution of tasks and to prevent workers from performing conflicting operations. Present research on scheduling is generally focused on hard time deadlines. Instead, the Scheduling component of the Check Suite proposes a solution where energy consumption, battery awareness, availability and affinity are considered as more important than execution time. The last component provided by the Check Management Protocol Suite is the availability of a high-level, service-oriented self-healing strategy. Here the WSAN is regarded here as a service provider. Check thus offers a high-level framework for assuring service availability in WSANs. Whenever a component of a WSAN island fails, it is of paramount importance that the functionality it provides is not lost, to ensure the availability and reliability of the services being offered. Check Self-Healing is the SENSEI component providing the recovery strategies employed when these events occur. Services can be allocated to nodes by the Check-Scheduling component of the Check Suite. The self-healing component identifies failing or poorly performing services and signals and orders the scheduler to reallocate them or reallocates them itself and configures the nodes directly. The self-healing algorithms can manage multiple WSAN islands through the Check – Monitoring and Reconfiguration management component, and can thus move services in heterogeneous WSAN islands if data dependencies allow it. It must also be noted that this coupling of the Self-Healing and Monitoring components, by being able to gather information from a wide variety of devices, using many operating systems and offering numerous services, will provide a hardware- and operating system-independent mechanism for service-level self-healing in the SENSEI system. |
