Patent ID: 8488480

Claim:
A method for operating a Mobile Station (MS) in a Multiple Input Multiple Output (MIMO) wireless communication system, the method comprising: determining a Precoding Matrix Index (PMI) type indicated by a serving Base Station (BS), wherein the PMI type indicates which PMI is required to report among a worst case PMI that maximizes interference to the MS and a best case PMI that minimizes interference to the MS; measuring channel quality for the serving BS and interference power from one or more neighbor BSs; determining a PMI and a priority metric for each neighbor BS; and feeding back the channel quality and at least one of the PMI, a PMI type indicator and the priority metric to the serving BS, wherein the PMI comprises one of the worst case PMI and the best case PMI, and wherein the priority metric comprises a differential Channel Quality Indicator (CQI) that represents CQI gain when the PMI is used.