METHOD AND DEVICE FOR GENERATING REFERENCE SIGNAL OF CELLULAR MOBILE COMMUNICATION SYSTEM

摘要

A cellular mobile communication system comprises: a terminal which obtains C-port information from a base station by attempting an initial access, selects distributed antennas for D-port information after having transmitted an SRS, and communicates with said base station through said selected distributed antennas and a central antenna; and the base station which transmits the C-port information disposed in the center of a cell during the attempt of the initial access of said terminal, indicates the terminal to transmit the SRS, receives said SRS through the central antenna and distributed antennas, which are distributed within the cell and transmit and receive data with the terminal in some areas of the cell service areas, selects at least one distributed antenna by analyzing said SRS, notifies the terminal of the D-port information of said selected distributed antennas, and communicates with said terminal through said selected distributed antennas and the central antenna. Compared with a CAS, a distributed antenna system (DAS) of the cellular mobile communication system is capable of providing an enhanced mobile communication service by uniformly distributing antennas to service areas of a cell. The invention provides many kinds of DM-RS sequences in a distributed antenna system (DAS), in which antennas operated by each base station are distributed to service areas of the corresponding base stations of a cellular mobile communication system in which the plurality of the base stations exist, thereby easily distinguishing DM-RSs of various terminals which operate in the same RB. Thus, the invention maximizes the use of RS resources in the DAS. Therefore, according to an embodiment of the present invention, the cellular mobile communication system enables the DM-RSs to be efficiently generated and transmitted through antennas arranged in the center and the vicinity of a cell, whereby data is transmitted and received to and from each terminal at a high data rate regardless of the position of the terminals located within the cell.