A secondary synchronization, S-SCH, signal for a communication system, comprising: two secondary synchronization code, SSC, sequences from a SSC sequence set, wherein a first short code and a second short code respectively are indices of the two SSC sequences, and the S-SCH signal is identified by a codeword formed by the first short code and the second short code [the first short code, the second first code], and the codeword formed by the first short code and the second short code corresponds to a cell identifier, ID, in plurality of cell IDs, characterized in that the ID or cell group ID, and the first short code and the second short code satisfy as follows: when 0≤ID≤29, the first short code is equal to the ID, and the second short code is equal to the first short code plus 1; when 30≤ID≤58, the first short code is equal to the ID minus 30, and the second short code is equal to the first short code plus 2; when 59≤ID≤86, the first short code is equal to the ID minus 59, and the second short code is equal to the first short code plus 3; when 87≤ID≤113, the first short code is equal to the ID minus 87, and the second short code is equal to the first short code plus 4; when 114≤ID≤139, the first short code is equal to the ID minus 114, and the second short code is equal to the first short code plus 5; when 140≤ID≤164, the first short code is equal to the ID minus 140, and the second short code is equal to the first short code plus 6; when 165≤ID≤169, the first short code is equal to the ID minus 165, and the second short code is equal to the first short code plus 7. two secondary synchronization code, SSC, sequences from a SSC sequence set, wherein a first short code and a second short code respectively are indices of the two SSC sequences, and the S-SCH signal is identified by a codeword formed by the first short code and the second short code [the first short code, the second first code], and the codeword formed by the first short code and the second short code corresponds to a cell identifier, ID, in plurality of cell IDs, characterized in that the ID or cell group ID, and the first short code and the second short code satisfy as follows: when 0≤ID≤29, the first short code is equal to the ID, and the second short code is equal to the first short code plus 1; when 30≤ID≤58, the first short code is equal to the ID minus 30, and the second short code is equal to the first short code plus 2; when 59≤ID≤86, the first short code is equal to the ID minus 59, and the second short code is equal to the first short code plus 3; when 87≤ID≤113, the first short code is equal to the ID minus 87, and the second short code is equal to the first short code plus 4; when 114≤ID≤139, the first short code is equal to the ID minus 114, and the second short code is equal to the first short code plus 5; when 140≤ID≤164, the first short code is equal to the ID minus 140, and the second short code is equal to the first short code plus 6; when 165≤ID≤169, the first short code is equal to the ID minus 165, and the second short code is equal to the first short code plus 7. when 0≤ID≤29, the first short code is equal to the ID, and the second short code is equal to the first short code plus 1; when 30≤ID≤58, the first short code is equal to the ID minus 30, and the second short code is equal to the first short code plus 2; when 59≤ID≤86, the first short code is equal to the ID minus 59, and the second short code is equal to the first short code plus 3; when 87≤ID≤113, the first short code is equal to the ID minus 87, and the second short code is equal to the first short code plus 4; when 114≤ID≤139, the first short code is equal to the ID minus 114, and the second short code is equal to the first short code plus 5; when 140≤ID≤164, the first short code is equal to the ID minus 140, and the second short code is equal to the first short code plus 6; when 165≤ID≤169, the first short code is equal to the ID minus 165, and the second short code is equal to the first short code plus 7.