A method, comprising: selecting a cell site from a plurality of cell sites of a wireless communications network, the cell site being a region in which wireless communications are provided to a plurality of mobile devices; receiving signal code power measurements from each mobile device from the plurality of mobile devices in the cell site; determining, for each mobile device from the plurality of mobile devices, a set of base station transmitters that transmit signals to that mobile device from the plurality of mobile devices in the cell site based on the signal code power measurements from that mobile device from the plurality of mobile devices; determining, for each mobile device from the plurality of mobile devices, a set of interfering base station transmitters corresponding to the set of base station transmitters for that mobile device minus base station transmitters from a set of base station transmitters assigned to provide source signals to that mobile device from the plurality of mobile devices in the cell site; characterized by summing, for each interfering base station transmitter from the set of interfering base station transmitters for each mobile device from the plurality of mobile devices, a set of signal code power values received in the signal code power measurements from at least one mobile device from the plurality of mobile devices and associated with that interfering base station transmitter from the set of interfering base station transmitters to produce a summed signal code power measurement for each interfering base station transmitter from the set of interfering base station transmitters. selecting a cell site from a plurality of cell sites of a wireless communications network, the cell site being a region in which wireless communications are provided to a plurality of mobile devices; receiving signal code power measurements from each mobile device from the plurality of mobile devices in the cell site; determining, for each mobile device from the plurality of mobile devices, a set of base station transmitters that transmit signals to that mobile device from the plurality of mobile devices in the cell site based on the signal code power measurements from that mobile device from the plurality of mobile devices; determining, for each mobile device from the plurality of mobile devices, a set of interfering base station transmitters corresponding to the set of base station transmitters for that mobile device minus base station transmitters from a set of base station transmitters assigned to provide source signals to that mobile device from the plurality of mobile devices in the cell site; characterized by summing, for each interfering base station transmitter from the set of interfering base station transmitters for each mobile device from the plurality of mobile devices, a set of signal code power values received in the signal code power measurements from at least one mobile device from the plurality of mobile devices and associated with that interfering base station transmitter from the set of interfering base station transmitters to produce a summed signal code power measurement for each interfering base station transmitter from the set of interfering base station transmitters.