Abstract:
A method for allocating a radio resource in a wireless communication system including a macrocell and at least one femtocell includes the steps of: identifying a white space which is an empty radio resource, and a macrocell band which is allocated as the radio resource of the macrocell; allocating the radio resource for searching a cell, that is near at least one femtocell, from the macrocell band in a normal resource allocating mode; and allocating the radio resource for each data communication, of at least one femtocell, from the white space in the normal resource allocating mode.
Abstract:
PURPOSE: An error correcting method in a communication system and a correcting apparatus for the same are provided to reduce the number of retransmission caused by a frame error, thereby improving a network transmission rate. CONSTITUTION: A modulator checks a frame of a receiving signal and detects the position of data having high probability of generating an error. An error code substituting unit finds the position of data having high probability of generating an error by referring to a demodulator and searches for a different value to substitute regarding the data in the found position. A frame error checking unit checks again whether an error occurs or not in the transferred frame and delivers the transferred frame to an upper layer block or the error code substituting unit according to the checking results. [Reference numerals] (601) Demodulator; (602) Frame error inspection unit; (603) Error code substituter; (604) Upper layer block
Abstract:
A cognitive radio apparatus according to an embodiment comprises an estimation module for generating a channel estimation signal transmitted to a random reception apparatus located in the random channel when the random channel is selected among multiple channels to execute communication in a cognitive radio network; a communication module for transmitting the channel estimation signal to the random reception apparatus and for receiving a channel response signal from the random reception apparatus; and a control module for controlling the communication module to transmit a communication signal set for the random channel or a variable communication signal for converting the communication signal to the random reception apparatus when a result on which the random channel is located in a deep fading section is determined based on the channel response signal.