CELL SEARCH METHOD, FORWARD LINK FRAME TRANSMISSION METHOD, APPARATUS USING THE SAME AND FORWARD LINK FRAME STRUCTURE
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Abstract
In a cellular system in which OFDM is used, a forward link synchronization channel, a common pilot channel structure, an initial cell searching method of a mobile station, and an adjacent cell searching method for handover are required.
A method of transmitting a forward synchronization signal in a wireless communication system according to the present invention includes generating a frame comprised of a plurality of sync blocks; and transmitting the frame through a forward link, wherein the frame comprises primary synchronization channel sequences which provide timing information of the sync blocks and a plurality of secondary synchronization channel sequences which provide timing information of the frame, wherein a cell identifier is specified by a combination of the primary synchronization channel sequence and a hopping code word specified by the plurality of the secondary synchronization channel sequences. Therefore, the cell searching time can be efficiently reduced in an OFDM system.
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Citations
73 Claims
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1-46. -46. (canceled)
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47. A method of generating a forward link frame in a communication system in which a plurality of cells are grouped into a plurality of cell groups, and each cell group includes at least two cells, the method comprising:
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generating a secondary synchronization signal for identifying a cell group; generating a primary synchronization signal for identifying a cell in the cell group corresponding to the secondary synchronization signal; and generating the forward link frame using the secondary synchronization signal and the primary synchronization signal. - View Dependent Claims (48, 49, 50, 51)
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52. An apparatus for generating a forward link frame in a communication system in which a plurality of cells are grouped into a plurality of cell groups, and each cell group includes at least two cells, the apparatus comprising:
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means for generating a secondary synchronization signal for identifying a cell group; means for generating a primary synchronization signal for identifying a cell in the cell group corresponding to the secondary synchronization signal; and means for generating the forward link frame using the secondary synchronization signal and the primary synchronization signal. - View Dependent Claims (53, 54, 55, 56)
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57. A method of searching a cell in a mobile station of a communication system in which a plurality of cells are grouped into a plurality of cell groups, and each cell group includes at least two cells, the method comprising:
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detecting a secondary synchronization signal and a primary synchronization signal from a received signal, identifying a cell group to which the mobile station belongs among the plurality of cell groups based on the secondary synchronization signal; and identifying a cell to which the mobile station belongs among at least two cells within the identified cell group based on the primary synchronization signal. - View Dependent Claims (58, 59, 60, 61)
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62. An apparatus for searching a cell in a mobile station of a communication system in which a plurality of cells are grouped into a plurality of cell groups, and each cell group includes at least two cells, the apparatus comprising:
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means for detecting a secondary synchronization signal and a primary synchronization signal from a received signal; means for identifying a cell group to which the mobile station belongs among the plurality of cell groups based on the secondary synchronization signal; and means for identifying a cell to which the mobile station belongs among at least two cells within the identified cell group based on the primary synchronization signal. - View Dependent Claims (63, 64, 65, 66)
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67. A computer-readable medium having a program stored thereon for executing a method in a communication system in which a plurality of cells are grouped into a plurality of cell groups, and each cell group includes at least two cells, the method comprising:
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generating a secondary synchronization signal for identifying a cell group; generating a primary synchronization signal for identifying a cell in the cell group corresponding to the secondary synchronization signal; and generating a forward link frame using the secondary synchronization signal and the primary synchronization signal. - View Dependent Claims (68, 69, 70, 71)
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72. A method of generating a forward link frame in a communication system in which a plurality of cells are grouped into a plurality of cell groups, and each cell group includes at least two cells, the method comprising:
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generating a secondary synchronization signal and a primary synchronization signal; and generating the forward link frame using the secondary synchronization signal and the primary synchronization signal, wherein one cell group of the plurality of cell groups and one cell within the one cell group are identified by a combination of the secondary synchronization signal and the primary synchronization signal, and the secondary synchronization signal depends on the primary synchronization signal. - View Dependent Claims (73)
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Specification