Patent ID: 9077467
Filing Date: 2015-07-07
Classification: H04B,H04J,H04W

Abstract:
1. A method of selecting a user terminal so as to enhance calibration for reciprocity error between uplink and downlink, in a network equipment in time division duplex communication systems, comprising: obtaining channel quality related information between a plurality of first user terminals and a first base station, wherein said channel quality related information is used for indicating channel qualities between said plurality of first user terminals and said first base station; and selecting at least one first user terminal as a calibration user terminal or terminals for calibrating said reciprocity error between uplink and downlink according to said channel quality related information; wherein when said first base station works at single cell mode, said selecting further comprises: selecting at least one candidate user terminal from said plurality of first user terminals according to said channel quality related information, wherein the channel quality between said at least one candidate user terminal and said first base station is greater than a first predetermined threshold; judging whether the number of said at least one candidate user terminal is greater than a predetermined number N; taking N user terminal or terminals which is/are the top N user terminal or terminals as to the channel quality with said first base station in said at least one candidate user terminal as said calibration user terminal or terminals, when the number of said at least one candidate user terminal is greater than N; and taking said at least one candidate user terminal as said calibration user terminal or terminals, when the number of said at least one candidate user terminal is less than or equal to N.