초록 ▼

A method is disclosed whereby a cellular network's Broadcast Control Channel Allocation BA lists are modified so that the mobile terminals in the network can measure downlink interference on predetermined Broadcast Control Channel Frequencies BCCH frequencies. These measurements can be made in all c

A method is disclosed whereby a cellular network's Broadcast Control Channel Allocation BA lists are modified so that the mobile terminals in the network can measure downlink interference on predetermined Broadcast Control Channel Frequencies BCCH frequencies. These measurements can be made in all cells where the mobile terminals are located and then reported back to the base station. The base station maps the reported measurements to corresponding cells, and uses the mapping to produce a cell-to-cell interdependency matrix. For the preferred embodiment, the matrix describes the difference in path loss between cells. This path loss information can be used to derive downlink Carrier to Interference Ratio C/I Carrier to Adjacent Ratio or C/A ratios between cells (or combinations of those ratios) and thus an estimate of the downlink interference in the frequencies assigned to the same cells. Consequently, the downlink interference in the network can be taken into account when new frequencies are to be selected for each cell, which can be used to increase the overall quality of the network (in terms of the C/I).

대표청구항 ▼

[ What is claimed is:] [1.] A method for use in estimating downlink interference in a cellular communications system, comprising the steps of:transmitting a predetermined list of channel frequencies;a plurality of mobile stations measuring a signal strength and decoding an associated base station id

[ What is claimed is:] [1.] A method for use in estimating downlink interference in a cellular communications system, comprising the steps of:transmitting a predetermined list of channel frequencies;a plurality of mobile stations measuring a signal strength and decoding an associated base station identifier of a plurality of frequencies from said predetermined list of channel frequencies;said plurality of mobile stations reporting said signal strength and said associated base station identifier of said plurality of frequencies; andcalculating a path loss difference between an associated cell and a plurality of surrounding cells by determining a difference between a computed path loss for the associated cell and a computed path loss for the plurality of surrounding cells to estimate the downlink interference.