DE102009007241A1 - Coverage determining method for digital trunked system, involves transmitting data associated with mobile interruptions to evaluating unit of mobile network after receiving corresponding request from evaluating unit - Google Patents

Abstract

The method involves storing data by a part of a mobile subscriber (MT), where the data is used for determining position of the mobile subscriber using satellite navigation devices. The data is associated with mobile interruptions, and an error of a signal to mobile systems (BS1-BS3) and/or non-establishment of a connection to the mobile systems are detected as the mobile interruptions. The data associated with the mobile interruptions is transmitted to an evaluating unit of a mobile network after receiving a corresponding request from the evaluating unit.

Description

The The invention relates to a method for determining network coverage a mobile network.

at cellular Mobile networks is for a nationwide Supply a variety of mobile stations - the so-called base stations at the mobile radio standard GSM - necessary.

These On the one hand, a large number of systems causes high costs, on the other hand is a high network coverage but an essential quality feature a network.

For the operators It is therefore an important concern of mobile networks that Number of mobile stations (base stations) under these two conditions to optimize, d. H. with a minimum of equipment a maximum To achieve network coverage.

Exist for that complex Calculation methods, however, in geographically unfavorable Areas not always to the desired Lead success.

Of the The invention is therefore based on the object, the prior art further.

These Task is solved according to the invention with a Method of the type mentioned, in which at least one part the mobile subscriber stores data used to determine the Position of the respective mobile subscriber are used can, and where these data are linked to occurring radio interruptions and the data correlated with occurring radio interruptions be sent to an evaluation of the mobile network.

The inventive method allows It easily determines the geographic availability of a mobile network to investigate. Priority will be given to the frequently frequented jobs recorded, as naturally many of them Mobile subscribers drop off their interrupt messages.

One Another particular advantage is that the network coverage during the Network operation can be continuously measured and so dynamic state changes can be determined.

In order to is for the mobile operator without additional Effort recognizable, which measures to Improve network coverage, have the highest efficiency, or which network gaps, first and foremost must be closed in order to reduce the probability of default the best To achieve success.

advantageously, the determination of the position of the respective mobile subscriber takes place with the help of satellite Navigation facilities. Such navigation systems are already in many mobile devices available by default. They deliver reliable and precise Places.

When Alternatively, the determination of the position of the respective Mobile subscriber by evaluating the received signals from Mobile communications systems take place.

The Position of a mobile subscriber is for the mobile operator in certain limits of accuracy known.

in the Standby operation, she is at least through the assignment to a location Area given. This information is used when the mobile subscriber is moving updated regularly. In conversation a more accurate position determination is possible because this is the active Mobile communication system is known, which is located in a known location is located and usually multiple directional antennas with known transmission directions having. The distance to the active mobile radio system can after mobile networks over the GSM standard the value of the timing advance parameter be estimated with a step size of about 550 meters. By inclusion The signals of neighboring mobile radio systems can increase the accuracy of the Position determination further increased become.

Cheap is it, when correlating with occurring radio interruptions Data only after a request to the evaluation unit the mobile network are sent. This request may be in advantageous Only a selected one Record subset of mobile subscribers. This can, for example particular cells or areas are examined.

From Interest is not only complete Lack of a signal to a mobile phone system, but also the Case that a signal from a mobile station is received, but due to, for example, network congestion no connection establishment comes.

Particularly advantageous is the use of the invention in a digital trunked radio system, for example, according to the TETRA (terrestrial trunked radio) standard. Mobile networks according to this standard are preferably used as a platform for mobile services with special security requirements. Users are primarily authorities and organizations with security tasks such as Police, fire or rescue services.

at such operations has the reliability the mobile network top priority and the inventive method delivers a significant contribution.

The The invention will be explained in more detail with reference to a figure, which by way of example shows the use of the invention in a mobile network.

The Figure includes a mobile subscriber MT, a mobile network with 3 mobile radio systems BS1, BS2, BS3, each of which is a radio cell FZ1, FZ2, FZ3 covers.

Farther a central evaluation station QoSC is planned.

Of the Mobile subscriber MT moves through the network along a Line. At regular intervals will determines the position. This can be done, for example, by satellite navigation done, or by using the tracking capabilities of the mobile network happen. The advantage of positioning using satellite-based navigation is that the position is determined independently can, whether the mobile subscriber is currently in the reception area of Network is located. In the embodiment shown in the figure be along the line of movement of the mobile subscriber MT means satellite-based Navigation 4 positions 1, 2, 3, 4 determined and stored in the device.

The first and second measured position 1, 2 are in the reception area the first and the third mobile radio system BS1 or BS3, or in the overlapping Areas of the first and third radio cell FZ1, FZ3.

In In this area there are good reception conditions, also network congestion be in this overlap area occur less frequently.

At the Progression on this line of movement will be the areas of leave first and third radio cell FZ1, FZ3 and thus the Connection to the mobile network interrupted.

at Use of a position determination by means of satellite-based navigation Now also the third position 3 is determined and together with the information about the power failure stored at this point.

at Application of the positioning capabilities of the mobile network is naturally in this Area no position determination possible.

in the further movement of the mobile subscriber is the entrance in the, by the second mobile radio system BS2 covered second radio cell FZ2 and the resumption of the connection to the mobile network. At the fourth position 4 is a further position determination and the storage in the device.

at Requirements are now stored by the central evaluation station QoSC Position data requested by mobile subscribers.

These Query can be selective, it can only be, for example to those located in a particular group of radio cells Mobile subscriber MT judge.

Send these then the stored position data with the associated information about the Reception conditions at the corresponding locations 1, 2, 3, 4 to the central evaluation station QoSC.

These determines from this any network gaps and the frequencies the failures from mobile subscribers due to these network gaps.

The Knowledge about the reliability the network is especially significant when it comes to coordination the stakes from security forces, like Police, fire or rescue services is used. For this Purposes are usually digital Trunked radio system z. B. according to the TETRA (terrestrial trunked radio) standard used.

Of the Use of the invention is therefore of great advantage in these networks, because he, for example, to a quick assessment of the quality of reception in one certain area can be used.

Claims (7)

A method for determining the network coverage of a mobile network, characterized in that - at least a part of the mobile subscriber stores data that can be used to determine the position of the respective mobile subscriber, that - these data are associated with occurring Funkturterbrechungen and - that correlates with occurring radio interruptions Data is sent to an evaluation unit of the mobile network. Method according to claim 1, characterized in that that the determination of the position of the respective mobile subscriber with the help of satellite navigation devices. Method according to claim 1, characterized in that that the determination of the position of the respective mobile subscriber by evaluation of the field strength the received signals from mobile stations takes place. Method according to one of claims 1 to 3, characterized that correlates with occurring radio interruptions data after a corresponding request to the evaluation unit of the mobile network be sent. Method according to one of claims 1 to 4, characterized that as occurring radio interruptions the absence of a signal to a mobile radio system and / or the Nichtzustandekommen a Connection establishment are detected. Method according to one of claims 1 to 5, characterized that the mobile network is constructed as a digital trunked radio system. Method according to claim 4, characterized in that that the request for sending the correlated with occurring radio interruptions data a selected one Subset of mobile subscribers takes place.