WO2016170377A1

WO2016170377A1 - Method for transmitting and receiving messages in wireless communication network and such communication network

Info

Publication number: WO2016170377A1
Application number: PCT/HU2016/050015
Authority: WO
Inventors: Sándor Szabó; András BALOGH; Károly LENDVAI
Original assignee: Pi Holding Zrt
Current assignee: Pi Holding Zrt
Priority date: 2015-04-22
Filing date: 2016-04-21
Publication date: 2016-10-27
Anticipated expiration: 2017-10-22
Also published as: HUP1500182A2; HU231364B1

Abstract

The subject of the invention relates to a method for the wireless sending and receipt of messages in a communication network, the essence of which is - at least two transceivers (10) are provided set up in such a way to be suitable for emitting an electromagnetic positioning signal (12p) with first range (Rp) and an electromagnetic data transfer signal (12a) with second range (Ra), - an electromagnetic positioning signal (12ρ') with first range (Rp') is emitted with the help of a first transceiver device (10') among the at least two transducer devices (10) for the mobile communication device (20), - an electromagnetic data transfer signal (12a') with second range (Ra') is emitted with the help of the first transceiver device (10'), - the electromagnetic data transfer signal (12a') with range (Ra') emitted by the first transceiver device (10') is received with the help of a second transceiver device (10") from among the at least two transceiver devices (10). The subject of the invention also relates to a communication network that realises such a method.

Description

Method for the wireless sending and receipt of messages in a communication network, as well as such a communication network

The subject of the invention relates to a method for the wireless sending and receipt of messages in a communication network.

The subject of the invention also relates to a communication network that contains at least two transceiver devices suitable for the wireless sending and receipt of messages.

With the widespread use of electronic devices (such as laptops, mobile telephones, headphones, loudspeakers, etc.) it has become necessary to develop technology with which the various types of device are able to communicate with each other and exchange data between each other in a wireless manner. The Ericsson company's Bluetooth radio communication technology offers a solution to this problem, which was originally planned for creating short-distance radio connections between portable or fixed office devices. Over time the technology became a standard, which other manufacturers also accepted, in this way wireless communication between computers, printers, smartphones and other devices became possible with the help of the small and relatively cheap chips using the built-in Bluetooth standard. In the place of the earlier cable connection, the information gets to the given device via a special radio channel. The objective was to create a radio connection that replaces complex cabling with a universal transmission system that is accessible to all devices.

Devices based on Bluetooth technology (labels, signal generators) have become widespread, for example in the field of indoor geolocation or other location based services. In order to provide geolocation services or other location based services the Bluetooth device regularly transmits its own signal that is detected with an external mobile device. In the case of geolocation services, the mobile device determines its own position from the signals of one or more Bluetooth devices in the knowledge of the positions of the given Bluetooth devices. In the case of providing location based services an application running on the mobile device usually provides some kinds of services (such as advertising or information displaying, electronic coupon downloading, etc.), which may take place on the basis of the geolocation service already mentioned, or simply in a way associated with the detected Bluetooth signal (for example, on detecting the signal from a Bluetooth device placed in the shop window display of a given store, the mobile application displays the promotion offer of the given store). The signal emitted by Bluetooth devices (such as so-called Bluetooth beacons) for the purpose of providing geolocation services or other location based service is referred to as a positioning signal, although it is obvious that the use of actual geolocation or location based services may demand further devices (such as mobile telephone, server, etc.) and programmes and algorithms running on them. Such positioning signals contain data suitable for identifying the transmitting Bluetooth devices, on the basis of which geolocation or other location based services may be provided in a way that is known to a person skilled in the art.

Regular signal transmission is energy demanding, therefore Bluetooth devices designed for long-term operation either have a suitable energy supply (e.g. battery) or use a communication standard that consumes a small amount of energy. The most up-to-date Bluetooth 4.0 standard is available in two versions. The dual mode Bluetooth version 4.0 also supports the previous Bluetooth standards (classic, High-Speed, Low-energy) and is primarily used in those devices where Bluetooth is already currently there (e.g. mobile telephones, laptops). Contrary to this the so-called "single mode low energy" (BLE) version appears in especially low consumption electronic mobile devices (for example in step counters, key rings, thermometers, etc.).

The latest Bluetooth 4.0 standard "single mode low energy" (BLE) version makes low-energy-consumption, short range radio communication possible, therefore it is suitable for use in Bluetooth devices used for providing geolocation services or other location based services.

It was recognised that in the case of systems providing Bluetooth based geolocation or other location based services, it is important to continuously monitor and manage the signal generators (for example, firmware updates, changing the signal emitted by the signal generators in the interest of stopping unauthorised service use, etc.). However, in the case of a system consisting of a large number of signal generators, this may represent a serious problem due to the wide distribution of the devices and their large number. Searching for the individual Bluetooth signal generators and managing them onsite is exceptionally time consuming, and the construction of a cable network created from data cables to provide remote management may be exceptionally costly and cannot even be implemented in a given case.

The aim of the invention is to provide a communication network and method that is free of the disadvantages of the solutions according to the state of the art. The aim of the invention is especially to provide a communication network that is suitable for providing geolocation or other location based services that can be constructed and maintained in a cost-efficient way.

The invention is based on the recognition that in a wireless network of transceiver devices both the transmission of a positioning signal used for geolocation services or other location based services and data communication signal transmission enabling remote management of the transceiver devices can be ensured with the time division multiplexing of two types of signal with different ranges (a smaller and a larger).

The task is solved in accordance with the above recognition using the method according to claim 1 .

Furthermore, the task is also solved with the communication network according to claim 8.

Certain embodiments of the invention are determined in the subclaims. The further details of the invention are presented in connection with embodiments, with the help of drawings. In the drawing

Figure 1 shows a schematic picture of the communication network according to the invention,

Figure 2 illustrates an overview flowchart of the method according to the invention,

Figure 3 shows an outline picture of an exemplary embodiment of the communication network according to the invention.

The main IT devices participating in the method according to the invention may be seen in figure 1 . The network according to the invention contains several transceiver devices 10 suitable for the wireless sending and receipt of messages, from which a first transceiver device 10' and a second transceiver device 10" are shown in figure 1 . All of the transceiver devices 10 are set up in a way suitable for emitting first range Rp, Rp', Rp" electromagnetic positioning signals 12p, 12p', 12p" and second range Ra, Ra', Ra" data transfer signals 12a, 12a', 12a", where the second range Ra, Ra', Ra" is larger than the first range a Rp, Rp', Rp" and the at least two transceiver devices 10, 10', 10" are arranged at a distance d from each other, which distance d is smaller than the second range Ra, Ra', Ra" and larger than the first range Rp, Rp', Rp".

The network according to the invention also preferably includes a management device 30 and a server 40.

The electromagnetic positioning signal 12p with first range Rp emitted by the transceiver devices 10 is received by the mobile communication device 20 which, however, is not necessarily a part of the network according to the invention. The characteristics of the electromagnetic positioning signal 12p with first range Rp and of the electromagnetic data transfer signal 12a with second range Ra, as well as the method of sending and receiving the electromagnetic positioning and data transfer signals 12p, 12a will be presented later.

In the context of the present invention, the range Rp of the electromagnetic positioning signal 12p means that distance within which the mobile communication device 20 of an average user is still just about able to detect the electromagnetic positioning signal 12p. In the case of a concrete embodiment, the range Rp is that distance where the signal strength of the emitted electromagnetic positioning signal 12p drops to -65dBm, which is the signal strength that a typical mobile communication device 20 (smartphone, tablet) is just able to detect. In the following, the range Ra of the electromagnetic data transfer 12a is viewed as that distance in which the transceiver devices 10' and 10" are just able to perform data transfer communication with each other. In the case of a concrete embodiment, the range Ra is that distance where the signal strength of the emitted electromagnetic data transfer signal 12a drops to -70dBm.

The transceiver device 10 may be any communication device able to receive and transmit radio waves that is compatible with the Bluetooth standards, and that is preferably set up in a way that makes time division multiplexing possible. Compatibility with the Bluetooth standards is understood as meaning that the transceiver devices 10 are established in a way suitable for emitting an electromagnetic signal according to the Bluetooth standard. The transceiver device 10 preferably includes memory 14 suitable for storing and retrieving the data (which will be described in detail at a later point) in the received data transfer signal 12a.

The management device 30 in data transfer connection with the transceiver devices 10', 10" is located at a fixed distance D from the transceiver device 10" in the case of the embodiment indicated in figure 2. The management device 30, similarly to the transceiver devices 10', 10", may be any communication device able to receive and transmit radio waves that is compatible with the Bluetooth standards and that may be connected to the IT system of the service provider of the method according to the invention through the first communication channel 102 realised through the global communication network 100, which is depicted by a server 40 in the case of the embodiment indicated in figure 1 . The global electronic communication network 100 is preferably the Internet, for example. The management device 30 is set up so as to be suitable for emitting an electromagnetic data transfer signal 32a with third range R in such a way that the third range R is greater than the distance D. The function of the electromagnetic data transfer signal 32a will be explained at a later point.

The user mobile communication device 20 is understood to mean a handheld computer able to perform communication on the global communication network 100 (e.g. GPRS, 3G, LTE), which is a handheld computer (typically under 1 kg in weight) that may be programmed or is suitable for running programmes. Such user mobile communication devices 20 include, for example, smartphones, tablets, PDAs (personal digital assistant), smart watches, etc. A mobile application 22 is preferably installed onto the user mobile communication device 20, which in the context of the present specification is understood to mean a programme written for any user mobile communication device 20 (for example smartphone, tablet, etc.). The user mobile communication device 20 and the server 40 may communicate with each other via the communication channel 104 realised through the global network 100. The server 40 is understood to be a computer performing one or more server functions, which, in a given case, may be performed as a cloud-based service. The server 40 preferably contains a user database 42, in which user data 42a may also be optionally stored.

In the following the method and communication network according to the invention are presented with reference to the above examples of hardware and software elements.

An overview flowchart of the method according to the invention can be seen in figure 2. Although the individual steps have been given consecutive serial numbers for reasons of simplicity, the order of the individual steps may, on many occasions, be switched, performed in parallel, combined, broken down into several steps, and further steps may also be inserted between the steps presented here, as is obvious for a person skilled in the art.

The method according to the invention is preferably preceded by the installation of at least two transceiver devices 10 set up so as to be suitable for emitting electromagnetic signals with first range Rp and second range Ra, in other words the installation and commissioning of at least two transceiver devices 10.

For the purpose of regular remote management of the transceiver devices 10, wireless data transfer communication is realised between the transceiver devices 10 with the help of the data transfer signals 12a. For example, by using the Bluetooth standard networks may be constructed that may be point-to-point networks, i.e. networks created by two Bluetooth devices, or point-to-multipoint networks, which involve the participation of several devices.

As step 1 of the method according to the invention, an electromagnetic data transfer signal 12a' with second range Ra' is emitted with the help of the first transceiver device 10'. The emitted data transfer signal 12a' preferably complies with the Bluetooth standard (i.e. its frequency falls between 2.4 and 2.4835 GHz), but naturally the use of electromagnetic waves with a different frequency may also be imagined. The data transfer signal 12a' preferably contains one or more pieces of information characteristic of the first transceiver device 10', such as, for example, the identification signal of the transceiver device 10' (e.g. a number series, character series, etc.), and/or the status of the transceiver device 10'. The status of the transceiver device 10' may be represented by, for example, an error code or failure to emit the data transfer signal 12a'. Naturally, the data transfer signal 12a' may also include other information. In the case of a preferable embodiment, the transceiver device 10' may emit several data transfer signals 12a' one after the other, at given intervals, therefore it may regularly send, for example, a status report about its operation condition.

In step 2 the electromagnetic data transfer signal 12a' with second range Ra' emitted by the first transceiver device 10' is received by a second transceiver device 10" from among the at least two transceiver devices 10. In the communication network according to the invention, the distance d between the first and second transceiver devices 10', 10" is less than the second range Ra' of the emitted data transfer signal 12a', therefore the data transfer signal 12a' reaches the second transceiver device 10" with a signal strength greater than -70dBm.

In the case of the embodiment of the invention visible in figure 2, when the communication network contains two transceiver devices 10 and a management device 30, (or in the case when the communication network contains more than two transceiver devices 10) the electromagnetic signal 12a with second range Ra is transmitted between the transceiver devices 10 in a multihop manner, the exemplary steps of which may be the following:

- an electromagnetic data transfer signal 12a' with second range Ra' is emitted by the first transceiver device 10',

- the signal 12a' emitted by the first transceiver device 10' is received by the second transceiver device 10",

- the second transceiver device 10" extracts the data forwarded in the form of an electromagnetic data transfer signal 12a' from the received electromagnetic data transfer signal 12a',

- the extracted data is preferably stored by the transceiver device 10" in its memory 14",

- then the data stored in the memory 14" is transmitted again in the form of an electromagnetic data transfer signal 12a" with second range Ra",

- the electromagnetic data transfer signal 12a" emitted by the second transceiver device 10" is received by the management device 30.

Naturally in the case of a network containing several transceiver devices several data transfer signal 12a" forwarding steps may be necessary in order to transmit data (for example, status report relating to operating condition) from one of the transceiver devices 10 to the management device 30 or vice versa, and to transmit data (such as a firmware update command) from the management device 30 to one of the transceiver devices 10.

During multihop data forwarding the route taken in the communication network of the data contained by the electromagnetic data transfer signal 12a is preferably determined using route selection algorithms. Such a route selection algorithm may be, for example, the "route selection based on shortest route" algorithm. In the case of this method, first an element "A" of the network calculates the distance from the element "A" to all the neighbouring elements, then gives a temporary label to all of its neighbours indicating the calculated distance. Following this the label of the neighbouring element with the smallest label (closest to "A") is made permanent, and the labels of the other elements are left in unchanged state. Following this the above is performed for all the elements neighbouring element "A", then for all their neighbouring elements until the labels of all the network elements have been given a permanent value. In this way it is possible to determine a traffic control table that contains the shortest distance of each element in the network from the other network elements and the route leading there.

Persons skilled in the art also know of deterministic route selection algorithms that have no need for a traffic control table or knowledge of the network topology. In the case of these algorithms, each network element operates independently, on the basis of the same algorithm.

An example of such a deterministic route selection algorithm is the "flooding traffic control" algorithm. During the procedure a network element sends the incoming data to all of the neighbouring network elements, except for the neighbour from where the data came, therefore one copy of the sent data is sure to reach its destination on the shortest route.

Naturally other route selection algorithms may be used apart from those listed (such as distance vector routing, connection status routing, hierarchical routing, etc.), as is obvious for a person skilled in the art.

In step 3 of the method according to the invention, the transceiver device 10" broadcasts the data stored in its memory 14" with the help of the electromagnetic data transfer signal 12a" with second range Ra", which is received with the help of the management device 30. The electromagnetic data transfer signal 12a" preferably complies with the Bluetooth standard, and its second range Ra" is greater than the distance D between the transceiver device 10" and the management device 30. The management device 30 extracts the information (such as an error code) representing the identifier and status of the sending transceiver device 10' from the received electromagnetic data transfer signal 12a".

In step 4 the management device 30 emits an electromagnetic data transfer signal 32a with third range R, which is received by the transceiver device 10". The electromagnetic data transfer signal 32a preferably complies with the Bluetooth standard, and its third range R is greater than the distance D between the second transceiver device 10" and the management device 30. In the case of the present embodiment, the electromagnetic data transfer signal 32a contains data destined for the first transceiver device 10' (such as a firmware update). In the case of a preferable embodiment, the electromagnetic data transfer signal 32a also contains the traffic control table presented above, with which the sent information gets to the given transceiver device 10 on the shortest route.

In step 5, the electromagnetic data transfer signal 32a with third range R emitted by the management device 30 is received with the help of the transceiver device 10", and the data carried by the electromagnetic data transfer signal 32a is extracted from the received electromagnetic data transfer signal 32a, which the second transceiver device 10" preferably stores in its memory 14".

In step 6 of the method according to the invention, the transceiver 10" broadcasts the data stored in its memory 14" with the help of the electromagnetic data transfer signal 12a" with second range Ra", which is then received by the first transceiver device 10'. The first transceiver device 10' extracts the data carried by the received electromagnetic data transfer signal 12a". In the case of a preferable embodiment, the firmware update is performed with the help of the extracted data (command).

In the case of another embodiment of the method according to the invention further steps 3a and 3b may be inserted between steps 3 and 4. In the case of this embodiment the management device 30 performs the function of network gateway, and connects to the server 40 through the first communication channel 102 implemented through the communication network 100.

In step 3a, with the help of the management device 30, the data contained by the electromagnetic data transfer signal 12a" is extracted from the electromagnetic data transfer signal 12a" received from the second transceiver device 10", then the management device 30 sends the extracted data through the first communication channel 102 to the server 40. On the basis of the data received (such as the identifier and/or status of the transceiver device 10') in step 3b, the server 40 sends response data created for the transceiver device 10' through the first communication channel 102 to the management device 30. The response data sent by the server 40 may contain, for example, the data required for updating the firmware of the first transceiver device 10', the traffic control table in the communication network from the management device 30 to the transceiver device 10', as well as other data.

In step 7 of the method according to the invention, an electromagnetic positioning signal with first range Rp' is emitted for the mobile communication device 20 using the first transceiver device 10' among the at least two transceiver devices 10.

In the case of a preferable embodiment, an electromagnetic positioning signal 12p' with first range Rp' and an electromagnetic data transfer signal 12a' with second range Ra' are emitted with time division multiplexing, in other words the signals 12p' and 12a' are emitted by the first transceiver device 10' displaced in time with respect to each other.

The electromagnetic positioning signal 12p' with first range Rp' preferably contains the location data belonging to the first transceiver device 10'. The location data may be, for example, the GPS coordinates of the transceiver device 10', and/or data relating to the signal strength when emitted of the electromagnetic positioning signal 12p'. In step 8 the electromagnetic positioning signal 12p' with first range Rp' emitted by the first transceiver device 10' is received by the mobile communication device 20, and the position of the mobile communication device 20 as compared with the first transceiver 10' is determined by using a mobile application 22 pre-installed on the mobile communication device 20. Positioning may take place, for example, by the mobile application 22 extracting the identification data of the first transceiver device 10' from the electromagnetic positioning signal 12p' received by the mobile communication device 20, with which it identifies the source of the signal 12p', i.e. the first transceiver device 10'. The mobile application 22 (for example, using an inverse square signal propagation algorithm) determines the distance of the mobile communication device 20 from the first transceiver device 10' from the data relating to the signal strength of the electromagnetic positioning signal 12p' when emitted. The precision of the positioning may be increased by the mobile application using the signal 12p of several transceiver devices 10 at the same time in order to determine the position of the mobile communication device 20 as compared to the position of the transceiver devices 10.

In the case of a preferable embodiment, the electromagnetic positioning signal 12p' with first range Rp' contains some kind of identification data of the first transceiver device 10', on the basis of which, for example, by using the mobile application 22 running on the user mobile communication device 20, it can be determined (from a table, for example) which transceiver's 10 signal the mobile communication device 20 received, and where the given transceiver device 10 may be found. When providing a location based service it is not necessary to determine the location of the transceiver device 10, it is sufficient, for example, to provide the service belonging to the given identifier in the case of receiving the identifier of the given transceiver device 10 (for example, displaying advertisements or information on the user mobile communication device 10).

In a preferable embodiment, the user of the mobile communication device 20 provides user identification data using a mobile application 22. The user identification data may be a series of characters, which may include numbers and/or small and capital letters and/or other characters, as well as a biometric identifier, such as a fingerprint, but, naturally, other identification procedures may be imagined apart from those listed. In a given case the provision of the user identification data may require that several identification data members be inputted, such as user name as data member, and password as data member.

Preferably the user data 42a belonging to the given user are stored in advance in the user database 42 on the server 40, with which the user identification data can be compared, for the purpose of authentication, for example. The user data 42a may be, for example, data relating to age, sex, occupation, area of interest, etc., but naturally other data relating to the user may also be given. For example, a user profile may be created from the user data 42a belonging to the user, which profile, preferably at any time, may be amended or extended at a later point in time.

In step 9 the mobile communication device 20 sends the data relating to the location of the mobile communication device 20 through the second communication channel 104 realised through the global communication network 100 (in a given case the identification data of the transceiver device 10 extracted from the positioning signal 12p) and the user identification data to the server 40.

In step 10, the server 40 identifies the user on the basis of the user identification data received from the mobile communication device 20 and finds the user data 42a belonging to the user in the user database 42.

In step 1 1 it sends personalised, location-dependent data packages complying with the user data 42a and the location of the mobile communication device 20 through the second communication channel 10 to the identified user's mobile communication device 20. This content may include, for example, data relating to the location of the user, advertisements, coupons, etc.

Figure 3 illustrates an outline picture of another exemplary embodiment of the communication network according to the invention. In the case of this embodiment the first transceiver device 10' emits several electromagnetic positioning signals 12p' with various ranges Rp1 ', Rp2', Rp3' to the mobile communication device 20 by time division multiplexing, the ranges Rp1 ', Rp2', Rp3' of which are preferably smaller than the distance d between the first transceiver device 10' and the second transceiver device 10". The electromagnetic signals 12p' with ranges Rp1 ', Rp2', Rp3' may be emitted directly one after the other in any chosen order, or preferably in increasing or decreasing order of the size of the ranges. The electromagnetic positioning signals 12p' with differing ranges Rp1 ', Rp2', Rp3' preferably contain various identification data, which make it possible to determine the position of the mobile communication device 20 as compared to the first transceiver device 10' even more precisely. For example, if the mobile communication device 20 also receives the electromagnetic positioning signal 12ρ' with the smallest range Rp1 ', then he mobile communication device 20 is located at a maximum distance of RpV from the first transceiver device 10'.

The first transceiver device 10' also emits the electromagnetic data transfer signal 12a' with second range Ra' presented in connection with the previous embodiments, which is received by the second transceiver device 10". The second range Ra' of the electromagnetic data transfer signal 12a' is greater than the distance d between the first transceiver device 10' and the second transceiver device 10". The electromagnetic data transfer signal 12a' may be emitted after the electromagnetic positioning signals 12p' with ranges Rp1 ', Rp2', Rp3', before them or between them using time division multiplexing.

It is obvious for a person skilled in the art that alternative solutions may be imagined as compared to those embodiments presented here, which however, fall within the sphere of protection determined in the claims.

Claims

1. Method for the wireless sending and receipt of messages in a communication network, characterised by that

- at least two transceivers (10) are provided set up in such a way to be suitable for emitting an electromagnetic positioning signal (12p) with first range (Rp) and an electromagnetic data transfer signal (12a) with second range (Ra),

- an electromagnetic positioning signal (12ρ') with first range (Rp') is emitted with the help of a first transceiver device (10') among the at least two transducer devices (10) for the mobile communication device (20),

- an electromagnetic data transfer signal (12a') with second range (Ra') is emitted with the help of the first transceiver device (10'),

- the electromagnetic data transfer signal (12a') with range (Ra') emitted by the first transceiver device (10') is received with the help of a second transceiver device (10") from among the at least two transceiver devices (10).

2. The method according to claim 1 , characterised by that the two transceiver devices (10) are provided arranged at a distance (d) from each other that is smaller than the second range (Ra) and larger than the first range (Rp).

3. The method according to claim 1 or 2, characterised by that the electromagnetic positioning signal (12ρ') with first range (Rp') contains the location data belonging to the first transceiver device (10').

4. The method according to claim 3, characterised by that the electromagnetic positioning signal (12ρ') with first range (Rp') emitted by the first transceiver device (10') is received by the mobile communication device (20), and on the basis of the positioning data, the position of the mobile communication device (20) is determined as compared to the first transceiver device (10').

5. The method according to claim any of claims 1 - 4, characterised by that the electromagnetic data transfer signal (12a) with second range (Ra) is forwarded among the transceiver devices (10) in a multihop way.

6. The method according to claim any of claims 1 - 5, characterised by that the electromagnetic positioning signal (12p) with first range (Rp) and the electromagnetic data transfer signal (12a) with second range (Ra) comply with the Bluetooth standard.

7. The method according to claim any of claims 1 - 6, characterised by that by using the first transceiver device (10') the electromagnetic positioning signal (12ρ') with first range (Rp') and the electromagnetic data transfer signal (12a') with second range (Ra') are emitted using time division multiplexing.

8. Communication network that contains at least two transceiver devices

(10) suitable for the wireless sending and receipt of messages, characterised by that the transceiver device (10) is set up to be suitable for emitting an electromagnetic positioning signal (12p) with first range (Rp) and an electromagnetic data transfer signal (12a) with second range (Ra), where the second range (Ra) is larger than the first range (Rp), and the at least two transceiver devices (10) are arranged at a distance (d) from each other smaller than the second range and larger than the first range.

9. Communication network according to claim 8, characterised by that the transceiver device (10) is set up in a way that enables time division multiplexing.

10. Communication network according to claim 8 or 9, characterised by that the transceiver device (10) is set up to be suitable for emitting electromagnetic signals according to the Bluetooth standard.