A wireless terminal apparatus (501, 502, 503, 504) in a wireless communication system having a base station service area divided into a local area and a remote area for respectively providing a service in a time division duplexing, TDD, channel and a frequency division duplexing, FDD, channel, the local area and the remote area being cell areas extending around a base station apparatus by different predetermined distances, comprising: means for transmitting a factor including a distance between the base station apparatus and the wireless terminal apparatus and a traveling speed of the wireless terminal apparatus, when a call is established; and means for receiving a command, characterized in that wherein, if the wireless terminal apparatus (501, 502, 503, 504) is determined to be the local area based on the factor, the command indicates that the TDD channel is allocated to a forward link and a reverse link, wherein, if the wireless terminal apparatus (501, 502, 503, 504) is determined to be in the remote area based on the factor, the command indicates that the TDD channel is allocated to the forward link and the FDD channel is allocated to the reverse link, wherein, if the wireless terminal apparatus is determined to be in the local area and the traveling speed of the wireless terminal apparatus is higher than a threshold speed based on the factor, the command indicates that the TDD channel is allocated to the forward link and the FDD channel is allocated to the reverse link, and wherein frequency resources among frequency resources available to the base station apparatus are allocated to the FDD channel in the reverse link, and remaining resources except for the frequency resources among the frequency resources available to the base station apparatus are allocated to the TDD channel in each of the forward link and the reverse link. means for transmitting a factor including a distance between the base station apparatus and the wireless terminal apparatus and a traveling speed of the wireless terminal apparatus, when a call is established; and means for receiving a command, characterized in that wherein, if the wireless terminal apparatus (501, 502, 503, 504) is determined to be the local area based on the factor, the command indicates that the TDD channel is allocated to a forward link and a reverse link, wherein, if the wireless terminal apparatus (501, 502, 503, 504) is determined to be in the remote area based on the factor, the command indicates that the TDD channel is allocated to the forward link and the FDD channel is allocated to the reverse link, wherein, if the wireless terminal apparatus is determined to be in the local area and the traveling speed of the wireless terminal apparatus is higher than a threshold speed based on the factor, the command indicates that the TDD channel is allocated to the forward link and the FDD channel is allocated to the reverse link, and wherein frequency resources among frequency resources available to the base station apparatus are allocated to the FDD channel in the reverse link, and remaining resources except for the frequency resources among the frequency resources available to the base station apparatus are allocated to the TDD channel in each of the forward link and the reverse link.