Technical Report Document Number
Event Triggered Task Execution Use Case
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- Triggers M2M System is going to configure Gateway Device for scheduling task execution for data collection from sensor devices. Normal Flow
- Post-conditions Collected data is stored on the Data Storage Server for further use High Level Illustration
- Semantic Home Control
- Source NEC (ETSI, TTC) Actors
- Triggers None Normal Flow
- Alternative flow None Post-conditions
Event Triggered Task Execution Use CaseDescriptionGateway Device may be required to configure for executing some tasks which are triggered by pre-defined events. SourceFujitsu (TTC) Actors
Pre-conditions
Triggers
Normal Flow
Alternative flowAlternative Flow 1
Alternative Flow 2
Alternative Flow 3
Post-conditionsCollected data is stored on the Data Storage Server for further use High Level Illustration
Figure 9 42 Event triggered Task Execution High Level Illustration Potential Requirements
Semantic Home ControlDescriptionThis use case demonstrates co-operation between two independent M2M applications. The co-operation is made possible because one application can find the other application through semantic information about the application’s resources. This semantic information is available in the M2M System. One application is a building management system (BMS) for a big apartment house. The BMS is operated by a building manager, e.g. the owner of the apartment house. BMS has knowledge about the blueprints of all the apartments in the house, e.g. it knows which heater is located in which room (heaters are assumed to be equipped with temperature sensors/actuators). The other application is a home energy management system (HEMS). It has been subscribed by the tenant of one of the apartments. HEMS controls the heaters of the apartment (among other purposes).
SourceNEC (ETSI, TTC) ActorsBuilding manager: is running a Building management system (BMS) for his apartment house. Tenant of an apartment: has subscribed to a home energy management system (HEMS) for his apartment. M2M service provider: is providing access to the M2M System for both applications, BMS and HEMS. Building management system (BMS): is a M2M network application. Home energy management system (HEMS): is a M2M network application. Pre-conditionsThe Building management system (BMS) is an M2M application that contains all the information needed to manage a large apartment house. In particular it contains the construction details of the tenant’s apartment, where the doors and windows are located, where the heaters are, their capacity, etc. The BMS is used for overall control of the building, but information relevant for individual apartments (e.g. control of the heaters, built-in sensors for windows and doors) can be made available to authorized tenants. In case of fire, the complete blueprint of the house can be made available to fire-fighters. In the M2M System the BMS makes its information available as M2M resources, similar to as if they were data transmitted by a device. E.g. the complete apartment, individual rooms, their heaters and windows could be represented as M2M resources. A new tenant is renting an apartment in the house. As he is moving in, he also subscribes to a general-purpose home energy management system (HEMS) that promised a very efficient heater control. E.g. the HEMS always uses the best available electricity tariff and the heating is turned off when windows are open. As part of the subscription, the HEMS is granted access to the respective resources used by the BMS in the M2M system. In particular, the building manager has permitted access of the tenant’s HEMS to those resources of the BMS that are needed for energy management of the tenant’s apartment (rooms, heaters, door-and window sensors, etc.). Other resources not needed for this task are not exposed to the HEMS. TriggersNone Normal FlowThe newly subscribed HEMS will immediately start discovering new devices in the apartment. Once the BMS has granted access, the HEMS will discover the resources of the BMS that are related to the apartment. Using the semantic description of the devices the HEMS can immediately find out about the available rooms, heaters, temperature sensors, etc. With this knowledge it can configure itself without any human intervention. Since the BMS has configured its devices to be represented in the M2M System as abstract devices, the HEMS can use this information to immediately control the devices using the offered abstract command set. Consequently, HEMS does not have to understand the specifics (e.g. specific protocol) of a particular heater control. Later, the building manager installs a new device into the tenant’s apartment which can help in efficient energy management. This new device is also managed by BMS. Using the selection rule of the HEMS service, the new device will get immediately available to the HEMS. The HEMS will discover the new device and will use it to control the apartment’s energy consumption. Alternative flowNone Post-conditionsNone High Level IllustrationNone Potential Requirements
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