Patent ID: 9456452
Filing Date: 2016-09-27
CPC Classification: H04B,H04W

Claim Text:
1. A scheduling method of a multi-user multi-input multi-output (MIMO) communication system, the scheduling method comprising: transmitting a channel state information request signal to a user equipment when data to be transmitted to the user equipment is received; calculating, by the user equipment receiving the channel state information request signal, an effective channel gain of the user equipment, determining whether channel state information (CSI) is capable of being transmitted, and transmitting the CSI of the user equipment according to a result of the determining; determining whether the CSI is received from the user equipment within a predetermined standby time; and when the CSI is received within the predetermined standby time, performing scheduling of the user equipment which has transmitted the CSI, determining whether a degree of freedom remains, and transmitting the channel state information request signal to another user equipment, from which CSI is not received, when the degree of freedom remains.