DE29811445U1 - Radiotelephone with positioning system - Google Patents

Description

Utility model application Fritz Youngst Hans-Böckler-Str. 15

42549 Velbert

Radio telephone with location determination system Technical area

The innovation concerns a radio telephone for radio networks, comprising a receiving and a transmitting part, an operating unit, a speaking and listening unit and a data display.

State of the art

Radio telephones, also known as "cell phones", are now a widespread means of communication that is often carried on the move. The way a radio telephone works is that the radio telephone contacts or is contacted by a radio network provider's receiving or transmitting antenna. For such radio telephones, the transmission area is divided into cells. Transmitting and receiving antennas are set up within the cells. If a so-called network subscriber is in a certain cell, the antenna set up in it is addressed or the subscriber is contacted via this when the device is switched on. In order to be able to be called at any time, the radio telephone signals which cell it is currently in or when a cell has been changed.

Through the communication between the antenna of a cell in which the radio telephone is located and the radio telephone, the location can therefore be determined to the accuracy of one cell

This information can be determined easily and displayed on a display, for example. The disadvantage of this type of location determination is that the larger a honeycomb is, the less accurate the location determination becomes.

Another way to determine the location of such cell phones is the so-called cross-direction, which is certainly also used by the police to determine the whereabouts of people under surveillance. This requires the antennas of two honeycombs. A straight line is drawn from each of the antennas to the cell phone. The location of the network subscriber or their cell phone is at the point where the two lines cross.

The disadvantage of these types of location determination is that the procedures are either too imprecise or too complicated.

Furthermore, location determinations cannot be made in relatively unpopulated or remote areas, which are often not yet covered by network providers.

Satellite navigation systems are known for ships, airplanes, cars, and even for military applications. These navigation systems use the signals from geostationary satellites, e.g. GPS (Global Positioning System). The basics of GPS are described in "McGraw-Hill Encyclopedia of Science & Technology" 7th edition (1992), volume 16, pages 57 to 61. With this navigation system, the current location can be determined at any time. 25

epiphany

The aim of the innovation is therefore to create a radio telephone with which the exact location can be determined in the simplest way, even outside the network honeycombs. 30

According to the innovation, the task is solved by providing a satellite-based navigation system in the radio telephone to determine the location.

The determined location coordinates can advantageously be displayed on a data display. This can also be done by graphically displaying the location coordinates on a stored map. The navigation system is preferably designed in such a way that the user enters at least one starting point and one destination. The radio telephone then has means for determining the best route from one location to the other. The navigation system guides the user along this route to their destination.

Another advantageous design of the radio telephone can be that the coordinates of the location are continuously sent. This means that, for example, the mountain rescue service, which must be equipped with an appropriate receiver, can always check where the respective mountaineer is on the mountain. The mountain rescue service can then intervene in good time if the mountaineer strays from the right path. In addition to the location coordinates, an emergency signal can be sent together or at intervals. The location coordinates and/or the emergency signal can also be sent on frequencies other than the frequency provided by the radio network. The location coordinates and emergency signal transmission should only start when certain events occur. Such an event could be, for example, pressing a specially designed emergency button. The transmission could also be triggered by an external radio transmitter. This would be an advantage in the case of an avalanche accident, for example, if the victim is unable to operate the emergency button, so that a helper could react accordingly using an external trigger. But the police could also always use the external trigger to locate a person under observation when fighting crime.

Further advantages of the innovation arise from the subject matter of the subclaims.

Short description of the figure

Fig.l shows a schematic diagram of an innovative radio telephone in use.

Figure 1 shows a schematic diagram of a new radio telephone 10 with a satellite navigation system. Geostationary satellites 12, 14, 16 form the

The radio telephone 10 requires a navigation system (GPS) to function. A GPS receiver 18 is arranged in the radio telephone 10, which processes signals 20, 22, 24 from the satellites 12, 14, 16. The signals 20, 22, 24 are received via an antenna 26 provided on the radio telephone 10 and forwarded to the GPS receiver. The radio telephone 10 also has a data display 28, via which all data, such as telephone numbers, coordinates and radio network identification, can be displayed. If necessary, stored map material in which the corresponding coordinates are entered can also be displayed on the data display 28. A user can communicate with other telephone subscribers via a radio network 34 using a loudspeaker 30 and microphone 32. The radio network is symbolized by antennas 42 installed on houses 36, 38 and church 40.

An operating panel 44 is provided for operating the radio telephone. Below the operating panel 44 there is an emergency button 46 which causes the radio telephone 10 to send out emergency signals with the corresponding location coordinates on different frequencies. The frequencies do not necessarily have to be the same as the radio network 34. The emergency signal with the location coordinates can, however, be triggered by an external device 48, for example via a special radio sequence.

Claims (9)

Protection claims 1. Radio telephone (10) for radio networks, containing a receiving and a transmitting part, an operating unit (34), a listening and speaking unit (30, 32) and a data display (28) , characterized in that a satellite-supported navigation system (18) is provided in the radio telephone for determining the location. 2. Radio telephone (10) according to claim 1, characterized in that the determined location coordinates can be displayed on the data display (28). 3. Radio telephone (10) according to claim 2, characterized in that the location coordinates are shown graphically in a map on the data display (28). 4. Radio telephone (10) according to one of claims 1 to 3, characterized in that means for determining a path and for guiding are provided. 5. Radio telephone (10) according to one of claims 1 to 4, characterized in that means are provided for continuously transmitting the coordinates of the location. 6. Radio telephone (10) according to one of claims 1 to 5, characterized in that the location coordinates are transmitted together or at intervals with an emergency signal. 7. Radio telephone (10) according to one of claims 1 to 6, characterized in that the location coordinates and/or the emergency signal can be transmitted on a frequency independent of a radio network. 8. Radio telephone (10) according to one of claims 1 to 7, characterized in that the emergency signal transmission starts at predetermined events, such as pressing an emergency button. 9. Radio telephone (10) according to one of claims 1 to 8, characterized in that the transmission of the location coordinates and/or the emergency signal can be triggered from outside.