Patent ID: 8520639
Filing Date: 2013-08-27
Classification: H04W

Abstract:
1. An apparatus for performing handover in an advanced mobile communication system which provides traffic service to a mobile terminal in a multiple cell environment, the apparatus comprising: a handover control unit for recognizing cell determination parameters based on terminal status information collected from the mobile terminal in the multiple cell environment and/or information on traffic provided to the mobile terminal; a handover determination unit for assigning predetermined weights to each of the cell determination parameters when handover is required; a cell selection control unit for determining importance of each of the cell determination parameters based on the assigned weights and generating cell selection information for selecting a candidate cell for handover, which is the most optimal for the cell determination parameters in the order of the importance, among cells adjacent to a serving cell to which the mobile terminal belongs; and a handover execution unit for executing the handover based on the cell selection information, wherein said cell selection control unit is configured to: check whether the candidate cell for handover, which is the most optimal for the cell determination parameters in the order of the importance, exists in an adjacent cell candidate group; check, when the most optimal candidate cell does not exist, whether a suboptimal cell which meets a quality of service exists in the adjacent cell candidate group in consideration of resource states of the adjacent cell candidate group; and adjust, when the suboptimal cell which meets the quality of service exists, the cell determination parameters and search for an adjacent cell candidate group to select the suboptimal cell.