Patent ID: 9047756
Filing Date: 2015-06-02
Classification: G08C,H04Q

Abstract:
1. A method of receiving data by a collector node, comprising: listening, by the collector node, during a first listening period, for a hailing signal from a plurality of RF devices on a hailing channel, the hailing signal including identification of a specified data channel; in response to receiving the hailing signal from one of the plurality of RF devices, switching to the specified data channel and receiving data, by the collector node, on the specified data channel; collecting, by the collector node, during a collecting period, data from the plurality of RF devices; receiving, by the collector node, the data from at least one of the plurality of RF devices; listening, during a second listening period, for an alert notification; if an alert notification is received in response to listening for the alert notification, terminating receiving data from one of the plurality of RF devices; and receiving an alert data message from an RF device, wherein the first listening period and the collecting period occur at different times.