Patent ID: 9264192
Filing Date: 2016-02-16
CPC Classification: H04L,H04W

Claim Text:
1. A method of performing coordinated multi-point (CoMP) transmission and reception in an overlaid cellular system in which a first base station and a second base station overlay each other, the method comprising: performing a handover using a coordinated multi-point (CoMP) transmission and reception scheme based on Channel State Indicator-Reference Signal (CSI-RS) information of user equipment by the first and second base stations, wherein performing the handover comprises: a coordinated multi-point add modification step for adding a third base station that is included in the first base station and that is a neighboring cell of the second base station while the coordinated multi-point transmission and reception is performed by the first and second base stations; a coordinated multi-point exclude modification step of excluding the second base station while the coordinated multi-point transmission and reception is performed by the first, second, and third base stations; and a termination step of terminating the coordinated multi-point transmission and reception by excluding the third base station from the coordinated multi-point transmission and reception attended by the first and third base stations.