| 摘要 |
A method of obtaining information for locating an asset includes: listening, at an asset tag, for a first listen duration for landmark messages; receiving, at the asset tag during the first listen duration, at least one landmark message from each of one or more landmark tags; selecting a synched landmark tag from the one or more landmark tags; abstaining from listening, at the asset tag, for landmark messages until approximately a subsequent transmission time of a synched landmark message corresponding to the synched landmark tag; and waking up at approximately the subsequent transmission time of the synched landmark message to listen, at the asset tag, for landmark messages for a second listen duration such that the asset tag listens for the landmark messages during the subsequent transmission time; wherein the first listen duration is longer than the second listen duration. |
