Hierarchical frame structure for OFDMA systems with relay
A Chindapol, J Chui, V Marchenko - US Patent 8,204,018, 2012 - Google Patents
Orthogonal Frequency Division Multiple Access (OFDMA) is a communication system where
multiple users o may communicate with a network base station by each com municating over
distinct frequency ranges. The structure in which the various users communicate is dictated
by a frame that is defined at the base station. FIG. 1 is a diagram showing an exemplary
OFDMA frame. 25 The exemplary OFDMA frame 10 of FIG. 1 is a rectangular frame including
a downlink (DL) subframe 11 and an uplink (UL) subframe 12 separated by a switching gap …
multiple users o may communicate with a network base station by each com municating over
distinct frequency ranges. The structure in which the various users communicate is dictated
by a frame that is defined at the base station. FIG. 1 is a diagram showing an exemplary
OFDMA frame. 25 The exemplary OFDMA frame 10 of FIG. 1 is a rectangular frame including
a downlink (DL) subframe 11 and an uplink (UL) subframe 12 separated by a switching gap …
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