Abstract: The invention relates to a method of channel allocation in a fixed radio link network. For each radio link to be commissioned channels, interference level measurement on each available channel of the frequency band is carried out. Based on the interference measurements, best transmission and reception channel for the link are selected. Thereafter, the radio link can be commissioned and measurements in the next radio link to be commissioned can be started. Instead of using a fixed and pre-set channel for the fixed radio link, a channel is assigned autonomously and automatically when commissioning the link, depending on interference measurement results and/or distance measurement results. The possibility for automatic channel selection decreases the amount of commissioning work by removing the need for detailed frequency planning and fixed channel setting at the factory for each radio.

Abstract: A cellular radio system and a method for adjusting transmit power during call set-up. The system comprises at least one base station and a group of subscriber equipment communicating with one or more of the base stations. The signal-to-noise ratio between the subscriber equipment and a base station is estimated before an actual connection is set up. In order that the new connection not interfere with the existing connections, a desired power transmit value with which the desired signal-to-noise ratio is obtained is calculated for the transmit power of the transmitter. An initial value for the transmit power is calculated by means of the power-control parameters of the system and a given time constant and the transmission is started with the initial value. The transmit power in increased from the initial value to the desired power transmit value during a given time constant.

Abstract: The idea of the invention is to allocate channels within a predetermined group of cells with a dynamic channel allocation method and to equalize interference caused to the cell group by connections outside the cell group e.g. through frequency or time slot hopping. Cell groups may be superimposed and they may be formed e.g. by the cells of an office system or a broad-coverage mobile communications system, by the cells of a mobile communications network of two different operators, by the cells of a network according to two different systems or by the cells of a network operated by one operator. If the cell groups are formed of cells in one network, a suitable size may be chosen for the cell group so that the computing and signalling load required by centralized dynamic channel allocation in the cell group will remain easily controllable.

Abstract: A method and system for transmitting a pilot signal in a cellular radio system which includes a plurality of subscriber terminal equipments and at least one base station, each subscriber terminal equipment being connectable to the base station via a channel, the base station transmitting a pilot signal that is receivable by the subscriber terminal equipments, a load being formed at least by the subscriber terminal equipments that are presently connected to the base station, and each subscriber terminal equipment that is connected to the base station having an active group list that includes the base station. The load in the system is measured to produce a measured load result; and transmission of the pilot signal is halted at least periodically when the measured load result is greater than a set limit value.

Abstract: A radio system and a method for controlling transmitting power in the radio system, the radio system being composed of at least one base station communicating with one or more subscriber terminals located within a coverage area. The transmitting power of each subscriber terminal is controlled stepwise by power control commands and the step size of a change in transmitting power is adjusted separately for each connection. In order to achieve an accurate and fast power control, the step size is adjusted on the basis of several received successive power control commands by calculating, from the power control commands, the number of two successive commands in different directions in proportion to the number of commands examined, the calculated proportion is compared to a reference value and the step size is adjusted on the basis of that comparison.