Patent ID: 8547894
Filing Date: 2013-10-01
Classification: H04B,H04J,H04L,H04W

Abstract:
1. A cell-specific pilot signal transmitting method used in a mobile communication system, which has a base station and a mobile station that performs radio communication with the base station in a cell of a radio communication area formed by the base station, and which mixes, allocates unicast data and broadcast/multicast data to subframes in a radio frame, and transmits the radio frame as downstream data from the base station to the mobile station, the method comprising: by the base station, multiplexing cell-specific pilot signals to a first subframe to which the unicast data is allocated, while multiplexing cell-specific pilot signals to a second subframe to which the broadcast/multicast data is allocated; and setting a difference between a start phase of a cell-specific pilot signal transmitted in the first subframe in which the base station has transmitted the unicast data and a start phase of a cell-specific pilot signal transmitted in a next subframe to be equal to a difference between a start phase of a cell-specific pilot signal transmitted in the second subframe in which the base station transmitted the broadcast/multicast data and a start phase of a cell-specific pilot signal transmitted in a next subframe, wherein the difference between the start phase of the cell-specific pilot signal transmitted in the first subframe in which the base station has transmitted the unicast data and the start phase of the cell-specific pilot signal transmitted in the second subframe in which the base station has transmitted the broadcast/multicast data is controlled to be a predetermined difference.