METHODS AND APPARATUS FOR COMMUNICATING INFORMATION USING DIFFERENT TYPES OF SYMBOLS

摘要

PROBLEM TO BE SOLVED: To provide methods and apparatus suited for peer to peer communications systems operated in a half-duplex mode.SOLUTION: A first type of symbol 220 is used for control signaling including conveying transmission request signals and/or transmission request response signals. A second type of symbol 222 is used for conveying user data, e.g., traffic signals. The symbol period for a first type symbol is larger than the symbol period for a second type symbol. The tone spacing for a first type symbol is larger than the tone spacing for a second type symbol.