Patent ID: 8737512

Claim:
A method for selecting a transmission mode, comprising: step A: a base station determining whether the number of received effective precoders reported by a User Equipment (UE) is greater than or equal to a threshold a, if so, executing step B, otherwise, executing step D; step B: determining whether each received effective precoder is according to the same number of layers, if so, executing step C, otherwise, executing step D; step C: determining whether a variation speed of each effective precoder is fast, if so, applying a transmit diversity transmission mode to the UE, and ending the flow, otherwise, applying a Multi-Input and Multi-Output (MIMO) transmission mode to the UE, and ending the flow; and step D: applying a MIMO transmission mode to the UE; wherein the effective precoders are precoders reported by the UE and received by the base station in a most recent period L.