| 摘要 |
Determining a normalised path loss model comprises: receiving, at a wireless device (110) of the wireless system (100), over a first network (126), from each of a plurality of radios (140, 122, 124) of the first network (126), a respective reference signal, the respective reference signals forming a first set of reference signals comprising a first reference signal received from a first radio (140) of the first network (126), and a plurality of further reference signals received from the remaining radios (122, 124) of the plurality of radios of the first network (126); receiving, at the wireless device (110), over a second network (136), from each of a plurality of radios (140, 132, 134) of the second network (136), a respective reference signal, the respective reference signals forming a second set of reference signals comprising a first reference signal received from a first radio (140) of the second network (136), and a plurality of further reference signals received from the remaining radios (132, 134) of the plurality of radios of the second network (136), wherein the first radio (140) of the first network (126) and the first radio (140) of the second network (136) are located at a common location; calculating a first set of normalised reference signals from the ratio for each further reference signal of the first set of reference signals with the first reference signal of the first set of reference signals; calculating a second set of normalised reference signals from the ratio for each further reference signal of the second set of reference signals with the first reference signal of the second set of reference signals; comparing predictions of signal loss based on first set of normalised reference signals and the second set of normalised reference signals; and determining an estimate of shadow fading or signal reflectors using the result of the comparison. The first and second networks (126, 136) may be radio access technologies (RATs) using different frequencies (e.g. 2.4GHz and 5GHz). |
