| 摘要 |
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 (piy,t) transmitted by those transmitters (MSi) that transmit on the selected channel is then determined (302). The power level (sxy,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 (+E,cir G+EE rax,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. The generated values are stored (305) in an amplification element matrix as observations of the percentile values of amplification factors of pair-wise combinations of base stations (BSa-BSx). The method steps are repeated for all radio channels in the radio communications system, or for a subset of these radio channels, wherewith the amplification element matrix is updated with estimated percentile values of amplification factors of all pair-wise combinations of base stations in the radio communications system. |
