An arrangement for the localisation and identification of objects in one or several service regions defined by wireless networks in a room, and access to a contextual service for an approved object in the room, including; - one or several identification elements that function at short-range radio frequencies and that are intended to be associated with the object that is to be identified and located in the room, - a minimum of three first transmitters/receivers that function at short-range radio frequencies and that, deployed in the room, limit a service region, - first calculation means for the localisation of identification elements and the creation of measurement results based on the measured distance or direction to the identification element on the receipt of a response to a request from the said first transmitter/receiver, - a second transmitter/receiver that functions at short-range radio frequencies and that is arranged in the room for radio communication with the said first transmitter/receiver, - second calculation means for the calculation of the position of the identification element based on measurement results that are obtained from each first transmitter/receiver, characterised in that - each identification element comprises a CPU with a memory part and protocol stack, - the limit service region comprises an external frame of reference and one or several internal frames of reference (40:1-40:n) in the said external frame of reference, whereby the geographical location of each first transmitter/receiver is known to each frame of reference, the second calculation means can approve or reject the identification element that has been identified, firstly, by determining whether the located identification element lies within the external frame of reference, and secondly, by determining whether the located identification element lies within any internal frame of reference (40:1), and in the event of approval, - the second calculation means can assign a pre-determined network address to the approved identification element, and a pre-determined contextual service can be transferred from a database that is associated with the second transmitter/receiver, to the approved identification element, wherein the said transferred data is stored in the memory part of the identification element. - one or several identification elements that function at short-range radio frequencies and that are intended to be associated with the object that is to be identified and located in the room, - a minimum of three first transmitters/receivers that function at short-range radio frequencies and that, deployed in the room, limit a service region, - first calculation means for the localisation of identification elements and the creation of measurement results based on the measured distance or direction to the identification element on the receipt of a response to a request from the said first transmitter/receiver, - a second transmitter/receiver that functions at short-range radio frequencies and that is arranged in the room for radio communication with the said first transmitter/receiver, - second calculation means for the calculation of the position of the identification element based on measurement results that are obtained from each first transmitter/receiver, - each identification element comprises a CPU with a memory part and protocol stack, - the limit service region comprises an external frame of reference and one or several internal frames of reference (40:1-40:n) in the said external frame of reference, whereby the geographical location of each first transmitter/receiver is known to each frame of reference, the second calculation means can approve or reject the identification element that has been identified, firstly, by determining whether the located identification element lies within the external frame of reference, and secondly, by determining whether the located identification element lies within any internal frame of reference (40:1), and in the event of approval, - the second calculation means can assign a pre-determined network address to the approved identification element, and a pre-determined contextual service can be transferred from a database that is associated with the second transmitter/receiver, to the approved identification element, wherein the said transferred data is stored in the memory part of the identification element.