Patent ID: 8174995
Filing Date: 2012-05-08
Classification: H04L,H04W

Abstract:
1. A method implemented in an apparatus and operable in wireless communication, the method comprising: determining a first transmission pattern and a second transmission pattern, wherein the first transmission pattern indicates symbols and tones to use to send a reference signal when single frequency network (SFN) transmission is sent, wherein the second transmission pattern indicates symbols and tones to use to send the reference signal when SFN transmission is not sent, and wherein the first and second transmission patterns are not transmitted; selecting a transmission pattern for use in a sub-frame, from among a plurality of transmission patterns comprising the first transmission pattern and the second transmission pattern, depending on whether SFN transmission of data will be transmitted in the sub-frame; broadcasting, via a message separate from the reference signal, information indicative of the selected transmission pattern prior to the sub-frame to convey use of the selected transmission pattern in the sub-frame; and sending the reference signal in the sub-frame at the symbols and tones indicated by the selected transmission pattern.