Patent ID: 8498232
Filing Date: 2013-07-30
Classification: H04B

Abstract:
1. A method of transmitting data in a wireless communication system, the method including: preparing a frame including a unicast subframe for unicast data with respect to a single user and an MBS (Multicast and Broadcast Service) subframe for MBS data with respect to multiple users, a length of an MBS cyclic prefix (CP) inserted into the MBS subframe being longer than a length of a unicast CP inserted into the unicast subframe, and a number of unicast orthogonal frequency division multiplexing (OFDM) symbols in the unicast subframe being more than a number of MBS OFDM symbols in the MBS subframe; and transmitting the unicast data and the MBS data via the frame, wherein the MBS subframe comprises an idle time during which data is not carried, and the idle time is disposed at the temporally latest position in the MBS subframe, wherein the position of the MBS subframe is indicated by an OFDM symbol index from which the MBS subframe starts, and the idle time is obtained by the Equation as follows: where T