Method for reconstructing the map of an environment surrounding a wireless device and wireless device implementing such method

Abstract

A method is described for reconstructing the map of an environment (20) surrounding a wireless device (100), said environment (20) being equipped with one or more radio frequency tags (1) set in a number dependent on the level of detail to be obtained in said reconstruction, said method comprising the steps of: - receiving identification and localization data of said one or more radio frequency tags (1) over a wireless connection by said at least one wireless reception means (3) of the wireless device (100); - storing the identification and localization data of said one or more radio frequency tags (1) into a filing and / or storage means (5,6) by a processing means (2) of the wireless device (100); - providing on said output means (7) of the wireless device (100) at least one map of said environment (20) built on the basis of the identification and localization data of the radio frequency tags (1).

Description

technical field [0001] The present invention relates to a method for reconstructing a map of an environment around a wireless device such as to allow a user of the device to locate his / her own position within said environment. [0002] The invention also relates to a wireless device implementing such a method. Background technique [0003] Various systems are known in the art that are finalized to locate a device, and thus its user, within an environment (eg public building, shopping mall, museum, town hall, hospital). [0004] More specifically, such systems are primarily based on information derived from communications between radio frequency readers built into devices and a plurality of radio frequency identifications (ie RFID tags) arranged in a predetermined layout within the environment. [0005] Such a tag includes information about its own location, which is sent to a local server. [0006] Therefore, in order to be able to operate, these systems require that the d...

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Problems solved by technology

[0007] As an alternative, it is known, for example, from Japanese Patent Application No. JP2007-235496 to download environmental map data from a server into the device's memory, but this clearly implies problems with periodic updates and that the device must be located in a known environment , since it cannot be envisaged to be used in an unknown environment

[0008] Furthermore, currently available methods do not provide the user with a visual indication of the type of element (exit, hallway, room) located in the surrounding environment, which is often required to reach a given destination; Directions or paper maps available on site

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