Patent ID: 7236746
Filing Date: 2007-06-26
Classification: H04W

Abstract:
1. A method for measurement and identification of base stations transmitting on the same channel, thus interfering with each other, in a GSM cellular wireless network wherein a plurality of base stations each transmit a 51-multiframe signal including a plurality of FCCH bursts, a plurality of SCH bursts and a plurality of BCCH bursts, the method comprising: a) receiving signals within the intended coverage zone of the GSM cellular wireless network; b) correlating the received signals with an FCCH burst waveform signal to identify a set of FCCH correlation peaks therein; c) for each given FCCH correlation peak within said set of FCCH correlation peaks, generating data representing time-of-arrival and power level for the given FCCH correlation peak, and adding said data to a data file; d) determining whether any FCCH correlation peak of the set satisfies a certain detection threshold and, if not, then repeating at least some of steps a) to d); e) for at least one given FCCH correlation peak within said set of FCCH correlation peaks that satisfies the FCCH threshold, scheduling SCH burst decoding operations for a time window derived from the time-of-arrival of the given FCCH correlation peak; f) performing SCH burst detection and decoding operations on said signals during each time window scheduled in e) to thereby identify BSIC data and RFN data encoded in a given SCH burst detected within said signal, and adding time-of-arrival data, said BSIC data and a frame number data based on said RFN data for the given SCH burst to the data file; and g) for each given SCH burst successfully detected and decoded in f), identifying a plurality of time-of-arrival windows within the 51-multiframe based upon the time-of-arrival data and frame number data of the given SCH burst, and updating the data file to associate the BSIC data and frame number data for the given SCH burst with the power level data for each FCCH correlation peak whose time-of-arrival falls within said plurality of time-of-arrival windows of the 51-multiframe.