Arrangements of base transceiver stations of an area-covering network

Abstract

An arrangement of an area covering, cellular radio communication network having cell regions which can be. contiguously replicated without interference. A central transceiver station is coupled to a base station controller and has a plurality of decentral transceiver stations surrounding and coupled to the central transceiver station. Groups of adjacent decentral transceiver stations are grouped in respective cell areas. All of the decentral transceiver stations in each cell area are allocated the same transmission frequencies, but the frequencies of each cell area are different from the other cell areas in the cell region.

Description

FIELD OF THE INVENTIONThe invention relates to a plurality of arrangements of base transceiver stations of an area-covering radio network and to a method of operating such an arrangement.The invention further comprises base transceiver stations adapted to the new arrangements and a method of subsequently compressing an existing continuous radio network.DESCRIPTION OF RELATED ARTIn order to operate radio telephones, in addition to the respective mobile stations, an area-covering network of fixed transmission stations is necessary in order to ensure interference-free radio operation at any location within the area of coverage.In order to permit a large number of mutually independent radio participants to use their telephones simultaneously, the region of coverage is divided into a plurality of individual cells, each allocated with its own base transceiver station. By giving adjacent zones different frequencies, it is possible to identify a particular radio telephone with a respective ...

AI Technical Summary

Benefits of technology

The problem of the invention arises from these disadvantages of known arrangements of base transceiver stations of an areacovering radio network, and consists in changing the basic structure of the network in such a manner that, without increasing the number of cost-intensive base transceiver stations coupled to a base station controller, the number of cells per area is increased and / or without increasing the total number of frequencies of the network, the number of channels per cell can be increased.

It has been found advantageous if the switch is opened by the reception field strength detector when the signal is below a further threshold value. If this second threshold value is below the first threshold value, a hysteresis is obtained which ensures stable operation even at the periphery of a cell.

Problems solved by technology

On the other hand, any conventional base transceiver station requires a high level of investment, which considerably increases the cost of the radio network.

It has been proposed in the prior art to provide at each base transceiver station, instead of one non-directional aerial, three directional aerials, each covering a transmission or reception angle of approximately 1200, so that the number of cells can be tripled, but such a modus operandi involves heavily increased aerial and installation costs.

On the other hand, however, the total number of frequencies should not be increased, since the transmission frequencies available are limited by a number of other data transmission systems.

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