Device for wireless communication with a mobile telephone

The invention relates to a device for wireless having communication with a hand-talkie Mobile phone and with a transmitting and Empfangseinrich tion.

Most hand-talkies for wireless communica cation is small and handy portable radio intercoms, so-called mobile phones, which is light in weight exhibit, anywhere can be operated where an appropriate line is present. The transmit power known mobile phones is 1 or 2 W. disadvantage of These walkie talkies is firstly their low Transmission power, by the capabilities of the Mobile phones is restricted, which in particular in use applies inside the vehicle, where the transmitting and receiving Quali activities and to be desired grid stability. Of further occur with use of such a hand-held radio house phone by the radiated by the antenna and received electromagnetic waves in Radiowellenbe rich, as a carrier for the modulated sound signals serve, interference on the body both for user Liche impairment (for example, Affect a pacemaker) as well as USAGE tion inside the vehicle for technical faults on the motor vehicle, eg. as the on-board electronics, the airbag etc., can draw responsible. The same applies when used in aircraft. The greater the Sendelei is Stung of walkie appliance, the greater the high-frequency radiation or electromagnetic Influencing in the head area of ​​the user, through their frequent exposure no adverse health effects ruled out.

If such a handheld walkie talkie to improve Reception, for example, the external aerial Fahrzeu ges are connected, so are inside the car loose hanging cables required.

Furthermore, portable radios, called Por tables, known and by better transmission Received power as mobile phones, the transmitting power is between 5 to 8 watts, distinguished. This is her Application Although significantly greater than that of Walkie talkies and the electromagnetic Wow flussung a user over that by Hand Radiotelephones is lower because their antennas do not are arranged on the handset, but their use is in Vehicle limited because it big and heavy portable represent versions of mobile phones. While you can se all be used, but are due their size and greater weight to hand walkie devices unwieldy.

Finally, especially for use in vehicles Car telephones with a transmitting power of 8 watts known whose high transmission power a wide range of uses allows. The antenna of such car telephones is outside of the vehicle so that no electromagnetic tables influencing the user is present. operating and willingness restrictions as for the portable Versions are also not available. disadvantageous here, however, is that the user only within the is vehicle accessible. A change of vehicle is not possible. Moreover, the installation of a car telephone cumbersome and costly.

The invention is therefore based on the object, a Wireless communication device of the initially to provide said type which both outside inside vehicles, buildings, etc. at a high secure unit is simple to use and in particular in Use in the vehicle as well as in other areas the elec tromagnetic burden of the user in the head area is reduced in spite of high transmission power.

According to the invention said object is achieved by a An apparatus for wireless communication dissolved, the by each of the hand-talkie as well as to the transmitting and receiving means arranged infrared transmitting and Receiving unit is identified. Due to the inventions to the invention embodiment is thus for a cordless / wireless infrared connection between hand-talkie and transmitting and receiving device provided. To this Way, for example at disturbing connection cable Use be avoided in the vehicle interior. Of Furthermore, passengers, especially in the back seat of the vehicle, also easily make calls without that this act said connecting cables disturbing could. In the head area of ​​the user broadcast electromagnetic waves in radio waves avoided due to refinement of the invention, if the infrared link between transmitting and Emp catching device and hand-talkie is active in übri gene is with regard to the total duration of the disturbing Radiation reduction achieved the same. Infrared radiation itself is not harmful to health, so that thereby being an ideal replacement for the otherwise radiated radio waves is given. It is also an trouble-free use possible in airplanes.

Preferably, the transmitting and receiving device is provided with separate from the hand-talkie antenna connected. The connection can be wirelessly to build a wireless communication or by means Verbindungska bel done. In the antenna, this may be the External antenna of a vehicle or the external antenna act of a building. Accordingly there is currently no electrostatic magnetic interference before the user. Apart from the Hand-talkie as well as the transmission and Empfangseinrich device provided for infrared transmission and reception unit can in addition to the external antenna, in particular a vehicle-outside antenna, also an infrared-Sen Deactivating and receiving unit can be arranged. Preferably the unit while at the top of the vehicle exterior antenna set. Accordingly, when entering or Ausfah ren outdoor antenna damaging the infrared Transmitting and receiving unit is avoided. Leaving the Vehicle so the connection to the hand-talkie via the infrared transmitting and receiving unit at the top of maintained vehicle exterior antenna. This is a interruption he voice traffic both when leaving of the vehicle and when boarding the vehicle possible. According occurs as intra neither during operation half of the vehicle to still within walking distance Vehicle for the user unwanted electromagnetic Radiation.

In the hand-talkie invention may be to an existing handheld walkie talkie or cell phone act. This is then in addition to the infrared Transmitting and receiving unit provided. Preferably this unit to the antenna of the hand opening device, especially at the tip of the antenna arranged. On This will also undress and pushing the antenna of the mobile phone prevents damage the unit occurs. Such a phone can be both trouble-free calling via the infrared transmitting and Receiving unit are used, as well as in herkömmli chen radio operation by emitting and receiving electromagnetic waves via the antenna. To continue upon removal from the vehicle for an uninterrupted to provide voice communications, the hand-talkie is preferential , between antenna operation and infrared connection operatively switchable, the switching preferably automatically as soon as the distance between Vehicle external antenna and transceiver for an infrared connection is too large or the reached Distance to build an infrared connection is. When leaving the vehicle is therefore a best Outgoing connection via the infrared transmitting and receiving unit at the top of the vehicle exterior antenna upright receive. Upon further distance from the vehicle may then automatic switching of the infrared connection normal antenna operation / wireless operation of the hand-held radio speaking unit is done. This is always a uninterrupted voice traffic both when leaving of the vehicle and when boarding the vehicle worried. Outside the vehicle is a normal Speech communication via the antenna of the walkie device possible. Inside the vehicle this happens beneficial by way via the infrared connection by means of infrared transmitting and receiving units on the phone and at reception and transmission equipment in the vehicle. According occurs when Operating inside the vehicle and in the immediate Distance from the vehicle no interfering electromagnetic Radiation.

Of course, the operation of the invention Device not be on vehicles and their environment restricts, rather corresponding transmitting and Emp can reception devices with infrared transmitting and Empfangsein units in other ways, for example, within ge Find closed rooms of buildings etc., use. Advantageously, this example also provided be that the transmitting and receiving device as a portable pe res transmitter and receiver unit is formed. The transmission and receiving device can essentially in the form a slide housing be formed, which in corresponding receiving devices in the vehicle interior can be inserted. When leaving the vehicle can then the entire reception and transmission apparatus can be taken to then otherwise used to be. According stands then a portable radio (portable) are available. The receiving and transmitting device may substantially in the form of a German from the non-prepublished Patent Application 196 02 503.6 disclosed transmitting and be designed receiver.

In a preferred embodiment, it is provided that the Transmitting and receiving device of a central part, stationary infrared transmitter and receiver system is. Here in may be CLOSED to an outdoor or in in- doors arranged investment act. Correspondingly a use in buses, taxis and other public areas chen transport possible and within geschlosse ner spaces in subway stations, etc. As the number and gekop the network authentication with the handheld walkie talkie pelt is, so is a telephone with its own phone num mer possible. In addition, even small areas, eg. B. Residential areas, with a central transmitting and Empfangsanla with infrared transmitting and receiving units in a ge Such 'Infrared connection network "must be integrated.

In the hand-talkie, it may also be a dual- Fashion phone act. Preferably, the hand speaking will automatically be switched between modes. Accordingly, in dual-mode phones with automatic shear switching, for example, between GSM and DECT mode, and vice versa, the radio transmission by a inventive IR link are replaced. A sol Ches hand talkie is then also as a string Loste lephone usable, here too the IR transmitter and Emp fang units indoors and outdoors may be present. In enclosed spaces, the Units, for example, on the ceiling of the room, before preferably at the outlet of electric leads to lighting tion bodies etc. attached, so that the sending and Receive can be done optimally.

Overall, such a device is provided having a Avoid or reduce electromagnetic Strahlun gen in radio waves when using hand way radios, particularly within vehicles, outside and around vehicles and intra allows semi-enclosed spaces.

Further advantages and features of the invention result from the claims and from the following descrip tion, in the embodiments with reference to the drawings are explained in detail. In which:

<b>Fig.</b> 1 shows an inventive device for wireless communication with a mobile phone in the form of a Walkie device when using as a car phone;

<b>Fig.</b> 2, the handheld walkie talkie from <b>Fig.</b> 1 for use outside of the vehicle;

<b>Fig.</b> 3 shows the arrangement of a transmitting and Emp catching device with infrared transmission and receiving unit for assembly in confined spaces; and

<b>Fig.</b> 4 is a simplified illustration for Illustrate the connection several buildings of a residential area with transceiver systems with integrated infrared transmitter and Receiving units.

The in <b>Fig.</b> 1 to 4 embodiments and illustrated Examples for an inventive device wireless communication do not limit the device is inventive.

In the <b>Fig.</b> Inventive device 1 shown <b>1</b> for wireless communication comprises in the illustrated Embodiment, a radiotelephone <b>2</b> in form of Walkie device (cell phone) on which to herkömmli che, a switched on and off display and a having control keyboard, on the mobile phone / Phone on and can be switched off and operated. There are still, as with such walkie is way radios usual, a microphone and a loudspeaker cher, the unit includes a transmitter and a receiver, in particular and suitable electronics provided.

When the transmitter and receiver, the handheld walkie talkie <b>2</b> while an antenna <b>3</b> conventional design on. It can be, for example telescopically to a act extendable rod antenna. At the top of the bar antenna <b>3</b> this is with an infrared transmitting and Emp receiving unit <b>4</b> provided.

A further infra-red transmitting and receiving unit <b>5</b> is on the front panel <b>7</b> one in the form of a slide housing trained transmitting and receiving device <b>6</b> provided. By means of these two infrared transmitting and Empfangseinhei th <b>4</b>. <b>5</b> are the handheld walkie talkie <b>2</b> and the transmitter and receiver <b>6</b> active for establishing a wireless Communication connected to one another. The as Einschubge housing formed transceiver has, in addition one antenna amplifier not shown on the by the handheld walkie talkie <b>2</b> delivered power on a higher transmission power up sets and a Elek having electronics for hands-free operation and a may contain radio receiver. On the front panel<b>7</b> the insertion housing <b>6</b> are at least one acousto-elec tric speakerphone <b>8th</b> in the form of a microphone for hands-free operation, display screens <b>9</b> and Bedie tion fields <b>10</b> provided. The transmitter and receiver unit<b>6</b> can in principle also a loudspeaker for handsfree talking chen exhibit; additionally or alternatively it may with be connected to the conventional car speakers. In principle, however, is provided for the guiding the Discussions by the hand way radio <b>2</b> takes place.

To use as a car phone in a vehicle, the Rack Cases <b>6</b> in a bay <b>11</b> in the vehicle inner inserted. In the bay<b>11</b> is there These are preferably the standard shaft of the car radio. This car radio slot <b>11</b> has in a known manner Power connectors <b>12</b>, An antenna terminal <b>13</b> and connections <b>14</b> for car speakers <b>15</b> on.

Further, a case member <b>16</b> with a shaft <b>17</b> for receiving the insertion housing <b>6</b> provided. hereby , a portable radio, a so-called portable, be adapted to the entire car phone transmitter and receiver <b>6</b> and mobile <b>2</b> and outside the To use the vehicle.

So when you leave the in <b>Fig.</b> 2 by way of example Darge featured vehicle <b>18</b> the connection to the mobile phone <b>2</b> on fairly maintained, preferably at the Transceiver <b>6</b> connected external antenna <b>19</b> of the vehicle <b>18</b> also an infrared transmitting and receiving unit <b>20</b> provided at the tip of the antenna.

This is a non-disruptive speech communication both when leaving the vehicle <b>18</b> as well as in Going into this possible. For further away from vehicle <b>18</b> then an automatic changeover of the infrared connection to the normal operation of the antenna Mobile phones <b>2</b> done. In this manner, both in the driving generating inner and in close proximity to the vehicle <b>18</b> ensures that no electromagnetic Radiation in radio waves in the head area of ​​Benut dec acting on these.

In <b>Fig.</b> 3 is a simplified representation a possible Arrangement of the infrared transmitting and receiving unit <b>22</b> within closed rooms to use the walkie house phone <b>2</b> based on an infrared connection shown. As<b>Fig.</b> 3 this is removed, the Infrared transceiver unit <b>22</b> possible to the Ceiling of the room arranged so safe for a Connection to worry. In the illustrated Ausführungsbei game she is going to a lighting fixture <b>21</b> is introduced.

In <b>Fig.</b> 4 is again shown simplified as Building with a central transmitting and receiving system can be connected by means of infrared transmission. Initially, a digital exchange <b>23</b> via a terrestrial cable network <b>24</b> supplies and then irradiated for example via a suitable Satellite antenna <b>25</b> from. The radiated waves are then of Transmission and reception apparatus having transmitting and Emp reception facilities <b>26</b>, Further and with infrared transmission Reception units are provided, collected. In between these and in the illustrated embodiment at the Exterior of buildings mounted transmission and reception devices with infrared transmitting and receiving units <b>27</b> becomes then set up an infrared connection. As<b>Fig.</b> 4 It is also clear that sending and done Reception of the electromagnetic radiation in the radio waves range only between the highest points of the Building with each other, while the connection to the deeper or lower buildings by Infra red transmissions done. Accordingly, then there for an avoidance or reduction of electromagnetic Radiation in radio waves in the use of Walkie-talkies and thus for protecting the User such phones made.