Method and system for realizing a geofence scenario with an NGSI-system

A Next Generation Services Interface (NGSI) system according to at least the Open Mobile Alliance (OMA) NGSI 9/10 standard for realizing a geofence scenario, wherein the geofence scenario is defined by at least a geofence object set comprising mobile objects, a geofencing set comprising one or more geofences, and one or more geofence predicates for mathematically combining a geofence object set and a geofencing set, so as to provide a result including at least values true and false, the NGSI system including a processor configured to:

• provide an NGSI subscription protocol and an NGSI notification protocol and an NGSI interface for subscribing to the NGSI system, and
• provide a geofence event notification to a subscribing entity in response to a geofence trigger event, the geofence trigger event including one of an ENTER geofence event and a LEAVE geofence event,
• wherein the ENTER geofence event occurs when a value of one of the one or more geofence predicates changes from false to true, and
• wherein the LEAVE geofence event occurs when a value of one of the one or more geofence predicates changes from true to another value,
• wherein a geofence entity adapted to subscribe to a geofence event notification according to the NGSI subscription protocol via the NGSI interface, and wherein the NGSI interface is adapted:
• a) to specify the geofence scenario as NGSI operational scope for the NGSI subscription, and/or
• b) to include the geofence scenario as attribute of a NGSI entity for the NGSI subscription.

A system for realizing a geofence scenario, wherein the geofence scenario is defined at least by a geofence object set comprising mobile objects, a geofencing set comprising one or more geofences, and one or more geofence predicates for mathematically combining a geofence object set and a geofencing set, the result of the mathematically combining including at least the values true and false, the system comprising:

• a legacy Next Generation Services Interface (NGSI) NGSI system according to at least the Open Mobile Alliance (OMA) OMA NGSI 9/10 standard providing a NGSI subscription protocol;
• a legacy geofencing system;
• and
• a geofence dispatcher entity located in the transmission path between a geofence entity and the legacy NGSI system, the dispatcher entity including a processor adapted to provide two-way communication with the legacy NGSI system and the legacy geofencing system on the one hand and the geofence entity on the other hand, such that a geofence subscription for a geofence scenario is divided into a NGSI subscription and one or more geofence definitions, that the NGSI subscription is forwarded to the legacy NGSI system for subscription and the geofence definitions are forwarded to the legacy geofencing system for creating corresponding geofences,
• wherein an ENTER geofence event occurs when a value of one of the one or more geofence predicates changes from false to true,
• wherein a LEAVE geofence event occurs when a value of one of the one or more geofence predicates changes from true to another value,
• wherein the legacy NGSI system is adapted to provide geofence event notifications for the legacy geofencing system, and
• wherein the legacy geofencing system is adapted to provide the geofence event notifications via the geofence dispatcher entity back to a geofence entity in response to a geofence trigger event, the geofence trigger event including one of the ENTER geofence event and the LEAVE geofence event, the geofence entity translating the geofence notifications into NGSI geofence notifications understandable for the geofence entity.