Patent ID: 8725159
Filing Date: 2014-05-13
Classification: H04L,H04W

Abstract:
1. A mobile communication system, in which a mobile station is configured to perform CA (Carrier Aggregation) with a radio base station simultaneously using a first carrier of a first frequency band and a second carrier of a second frequency band higher than the first frequency band, wherein the radio base station is configured to manage a first cell using the first carrier and a second cell using the second carrier, a coverage area of the first cell and a coverage area of the second cell are configured to be geographically superimposed with each other, the coverage area of the first cell is configured to be larger than the coverage area of the second cell, and the first carrier is configured to provide a coverage and the second carrier is configured to not provide a coverage, wherein, in a non-overlapping coverage area, the mobile station is configured not to perform CA in the coverage area of the first cell where the coverage area of the second cell is not geographically superimposed with the coverage area of the first cell.