Telecommunications – Transmitter and receiver at separate stations
Patent
1994-08-22
1996-10-01
Urban, Edward F.
Telecommunications
Transmitter and receiver at separate stations
455 561, 455 63, 379 59, H04Q 736
Patent
active
055618391
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a method and an arrangement in mobile telecommunications systems which operate with channels/frequencies. These mobile telecommunications systems usually comprise, on the one hand, a number of base stations operating with channels/frequencies, which stations are connected to one or more mobile telephone exchanges, constituting a network system, and, on the other, of a number of mobile units. The mobile telecommunications system operates with a large number of channels/frequencies. As an example, the NMT system can be mentioned in which several hundred channels/frequencies are used. In areas with high traffic, however, this number of channels/frequencies is not sufficient. These areas are therefore provided with so-called microcell technology. Microcell technology involves a reduction in the size of the cells. That is to say, the output power is reduced, which leads to it being possible to reduce the distance to base stations with the same channel/frequency. The result is that the channels can be utilised in a more efficient way. The number of channels/frequencies which are allocated to an affected base station is related to the degree of utilisation of the base station. In addition, the method and arrangement are of the type which utilises elements for measuring and evaluating the signal strength which is transmitted from one or more mobile units.
PRIOR ART
It has already been known to carry out measurements of the traffic loading within the coverage area of a base station, here called a cell. The measurement values which have been obtained in association with these measurements provide a conception of a total traffic loading within the cell of the affected base station. The measurement values have not provided any conception of how the traffic is then distributed within the cell of the affected base station.
It is characteristic of these measurements that they have been carried out at an affected base station from the mobile telephone exchange side to the mobile unit side. These measurements have not provided a satisfactory basis for cell planning in mobile telecommunications systems.
SUMMARY OF THE INVENTION
Today's mobile telecommunications systems presuppose accurate cell planning in association with setting up new base stations or in association with changes in the traffic pattern. The nature of the basis for the cell planning is therefore of significant importance. It is desirable for the basis of the cell planning to provide a representation of traffic intensity linked to strategic geographic positions. The resolution of this representation must be considerably better than the size of the cells.
The invention relates to being able to solve this problem, among others.
In an embodiment of the invention, the signal strength is detected at one or more time points from one or more geographic positions, for which it is to be possible to produce a mean value and it is to be possible to establish a first representation in such a manner that the mean value of the traffic intensity is linked geographically within a variable time interval. The invention is also intended to solve this problem.
In an embodiment of the subject of the invention, a threshold function arranged in the measuring and evaluating elements is used in which it is to be possible to vary an adjustable threshold value in such a manner that the size of the threshold value determines the resolution in the part-representations. The invention is also intended to solve this problem.
In an embodiment of the subject of the invention, an antenna element is utilised by means of which it is to be possible to receive measurement values of the signal strength. This antenna element is to be located in a favorable manner from the point of view of measuring. The invention is also intended to solve this problem.
When new base stations are established or new systems are established within mobile communication, there is a great need for mapping geographically the traffic loading/intensity within th
REFERENCES:
patent: 5241686 (1993-08-01), Charbonnier
patent: 5265150 (1993-11-01), Helmkamp et al.
patent: 5293640 (1994-03-01), Gunmar et al.
patent: 5307510 (1994-04-01), Gunmar et al.
Arinell Fredrik
Osterberg Anette
Rosenlund Henrik
Telia AB
Urban Edward F.
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