Fuente: Wipo "Sensorization" Opportunistic wide area network (WAN) connectivity for sensor devices with low transmit power, triggered by sensor device broadcasts, is disclosed which increases the likelihood of the sensor devices' data messages reaching the base station. Multiple sensor devices within proximity to each other establish device to device links. When a sensor device successfully connects to the base station, the base station informs the sensor device selected as a gateway, which in turn broadcasts its identification to peer sensor devices by way of a multi-hop rebroadcasting scheme. This triggers a multi-hop forwarding scheme where sensor devices that receive the broadcast forward their data messages via the D2D links to other peers until their data messages reach the gateway sensor device. The gateway sensor device forwards data messages it receives to the base station, so that the base station receives data packets from multiple sensor devices.