Data generation apparatus, data generation method, base station, mobile station, synchronication detection method, sector identification method, information detection method and mobile communication system

Abstract

[Problems] To reduce a cell search process including sector identification without increasing a load on a transmission/reception device. [Means for Solving Problems] A synchronization channel (SCH) contained in a down link of a multi-carrier mobile communication system is multiplied by a sector unique code and a cell unique code (step S 1 ). The multiplication result is allocated to a sub-carrier on the frequency axis (step S 2 ) and subjected to a spread process and an IFFT process (steps S 3 , S 4 ). Furthermore, GI is inserted and D/A conversion are performed (steps S 5 , S 6 ). A multi-carrier is transmitted from a directivity antenna of each sector (step S 7 ). A reception side identifies the SCH position by the self-correlation method or the mutual correlation method and performs the FFT. After this, the reception side simultaneously performs identification of a sector by detecting a sector unique code and acquisition of cell unique information by demodulating a cell unique code.

1 - 33 . (canceled) 
     
     
         34 . A data structure of a synchronization channel (SCH) in a mobile communication system adopting a multicarrier communication scheme in which a cell is divided into a plurality of sectors, a base station controlling over the cell transmits a downlink signal to a mobile station in the cell by multicarrier communication, the downlink signal contains a synchronization channel (SCH), and the synchronization channel (SCH) is capable of being used in a cell search including sector identification,
 wherein a sector common code common in the plurality of sectors in the same cell is multiplied by sector specific codes varying with the sectors in the same cell, thereby enabling a cell search including sector identification using the synchronization channel (SCH) to be executed.   
     
     
         35 . The data structure of a synchronization channel (SCH) according to  claim 34 , wherein each of the sector specific codes has m (m is a natural number of “2” or more) code elements as a group, and is configured by repeatedly assigning the code elements of the group to subcarriers on the frequency axis, and the sector specific codes corresponding to respective sectors are orthogonal to one another. 
     
     
         36 . The data structure of a synchronization channel (SCH) according to  claim 34 , wherein a cell specific code is further multiplied, in addition to the sector common code and the sector specific codes. 
     
     
         37 . The data structure of a synchronization channel (SCH) according to  claim 36 , wherein the cell specific code is a code indicating information specific to a cell that a mobile station acquires in the cell search. 
     
     
         38 . A base station controlling over a cell containing a plurality of sectors,
 wherein the base station has a transmitting section for transmitting a signal including data of different synchronization channels to the sectors.   
     
     
         39 . A base station controlling over a cell containing a plurality of sectors,
 wherein the base station has a transmitting section for transmitting a signal generated by using a sector specific code corresponding to a sector identification number to identify each of the sectors.