Method for locating a radio tag
AssigneeSES-IMAGOTAG GmbH
InventorAndreas Rößl
Life of this patent
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Abstract
The invention further relates to a radio tag with a communication stage and a logic stage that interacts therewith The invention relates to a method for locating a radio tag whose position is unknown, wherein in a group of radio tags, in particular designed as electronic price-indicating devices, a locating signal is either a) emitted by one or more radio tags whose position is known and received by the radio tag whose position is unknown or b) emitted by the radio tag whose position is unknown and received by one or more radio tags whose position is known, and, in both cases a) and b), the reception quality for the locating signal is determined and provided, for the radio tag receiving the locating signal, as a basis for narrowing down the position of the radio tag whose position is unknown.
Claims17
A method for locating a radio tag (T17) which position is unknown, wherein, in a group of radio tags (T1-T18) that are allocated by radio to only a single access point, a locating signal (On):
- a) is either transmitted by one or more radio tags (T1-T6, T10-T12, T16, T18) which position is known and received by the radio tag (T17) which position is unknown,
- b) or transmitted by the radio tag which position is unknown (T17) and received by one or more radio tags (T1-T6, T10-T12, T16, T18) which position is known,
- and, in both cases a) and b), the reception quality (Qn) of the locating signal (On) is determined and provided at the radio tag (T1-T6, T10-T12, T16, T18;
- T17) receiving the locating signal (On) in order to narrow down the position of the radio tag (T17) which position is unknown, wherein
- once radio tag (T17) which position is unknown has been located, one or more radio tags (T1-T6, T10-T12, T16, T18) which position is known and which are positioned adjacent to the located radio tag (T17) are prompted to indicate the location of the located radio tag (T17).
Dependencies are inferred from the claim text.