Patent ID: 8472363
Filing Date: 2013-06-25
Classification: H04L,H04W

Abstract:
1. A transmission device, comprising: a generating unit configured to generate a subframe including multiple OFDM symbols; and a transmitting unit configured to transmit the subframe generated by the generating unit, wherein a unicast channel guard interval length for a unicast channel and a multicast channel guard interval length for a multicast channel which is longer than the unicast channel guard interval length are defined in the generating unit; wherein the transmission device comprises the following three methods manners, and the generating unit is configured to select one of the following three methods manners, to add guard intervals to the OFDM symbols in the subframe: (1) adding guard intervals with the unicast channel guard interval length to all the OFDM symbols in the subframe, (2) adding guard intervals with the multicast channel guard interval length to all the OFDM symbols in the subframe, and (3) adding guard intervals with the unicast channel guard interval length to a subset of the OFDM symbols, adding guard intervals with the multicast channel guard interval length to another subset of the OFDM symbols, and time-division multiplexing the subsets of the OFDM symbols in the subframe; wherein when adding the guard intervals to the OFDM symbols in the subframe in the manner (3), the generating unit is configured to map a control channel including scheduling information for the unicast channel, only to the subset of the OFDM symbols to which the guard intervals with the unicast channel guard interval length are added.