Abstract: The present invention relates to a method and to apparatus for estimating path loss in a radio communications system. The path loss of single radio connections are modelled as amplification factors and can assume values between 0 and 1. The method is commenced by selecting at least one radio channel (chy). The power levels (p.sub.iy,t) transmitted by those transmitters (MSi) that transmit on the selected channel is then determined (302). The power level (s.sub.xy,t) received in a number of receivers (BSx) on the channel (chy) concerned is measured (303). The base station membership (BSa, BSx) of the transmitters and receivers is identified (304). Estimated percentile values (G.sup.r.sub.ax,t) of the amplification factors of all combinations of transmitter and receiver pairs are generated with the transmitted and received power levels as input data.

Abstract: A method of and apparatus for stable regulation of transmission power level in a radio system use the carrier-to-interference (C/I) ratio of the communication channel. A C/I target that is a monotonically decreasing function of the interference on the channel is used for regulating the transmission power level. Thus, as the interference increases the transmission power increases to compensate, but to a level yielding a lower C/I level. The path loss or gain of the channel may also be determined and used in the regulation.