9.2 Home Energy Management System (HEMS)

9.2.1 Description

This use case introduces several services based on HEMS technologies.

Home appliances from multiple vendors are connected to a LAN or PAN, and controlled by the gateway device.

The gateway device aggregates functionalities of home appliances by getting their status and sending this to the management server.

The gateway device is also upgradable to host newly released home appliance(s).

The gateway device provides an API for remote control which takes privacy and authorization issues into account.

9.2.2 Source

oneM2M-REQ-2012-0072R05 Use Case Home Energy Management System (HEMS)

9.2.3 Actors

- User: user (owner) of the home appliances
- Home Appliance: appliances which may be from multiple vendors and are monitored and/or controlled energy consumption
- Gateway Device: a device installed in the user's home and receives remote control commands from the management server
- Management Server: the server which is in charge of collecting the status of appliances and controlling the appliances via the gateway device
- HEMS Application Server: the server which provides HEMS service for the user through the remote management server

9.2.4 Pre-conditions

- WAN connectivity to the Gateway Device is installed
- Service contract is required, and authentication credentials for the Management Service are installed on the Gateway device.

9.2.5 Triggers

New Air Conditioner (for example) is installed

9.2.6 Normal Flow

1. User operates the Gateway Device to identify newly installed Air Conditioner (A/C) on the LAN.
2. The newly installed A/C is identified by the Gateway Device.
3. The Gateway Device requests the Management Server to provide support software for the A/C.
4. The support software is installed on the Gateway Device.
5. The Gateway Device registers the functionalities of the A/C to the Management Server.
6. The Management Server notifies the event of the installation of the A/C to the HEMS Application Server.
7. The HEMS Application Server is reconfigured with the newly installed A/C.
8. The HEMS Application Server receives the latest status of all of the Home Appliances including the newly installed A/C from the Management Server.
9. The HEMS Application Server sends management command(s) to the Management Server to minimize energy consumption.

9.2.7 Alternative Flow

None

9.2.8 Post-conditions

Energy consumption within the home is minimized by monitoring and controlling Home Appliances.

9.2.9 High Level Illustration

Figure 9.2.9-1 Home Energy Management System High Level Illustration

9.2.10 Potential Requirements

1. Gateway Device shall have the following requirements.
2. To detect the newly installed Home Appliance.
3. To be provided with appropriate pre provisioning configuration which is required to host the Home Appliances?
4. To support Home Appliances from multiple vendors as an abstracted object model.
5. To allow control to be overridden of the Home Appliances by User's direct operation.