Ascending control signaling transmission method and base station of TDD-OFDMA system

The invention discloses a method for transmitting an up control signaling of a TDD-OFDMA system to solve the problems that the system complexity is high in the actual frequency hopping realization because the pre and post two parts of the hopping frequency do not have symmetry during the transmission of the up control signaling in an LTE system. The method comprises the following steps: a base station receives the up control signaling transmitted by a user equipment on a reservation band of an up business time slot, the up control signaling is mapped to a corresponding hopping frequency, when the up business time slot is composed of nine OFDM symbols, the pre part and the post part of the hopping frequency are respectively composed of four OFDM symbols; the base station treats according to the up control signaling. For the prior LTE system, when a CP is short, the treatment complex of the hopping frequency realization is reduced by using the symmetrical hopping frequency technical scheme.