发明名称 |
SYNCHRONIZATION CHANNEL FOR ADVANCED WIRELESS OFDM/OFDMA SYSTEMS |
摘要 |
A hierarchical downlink (DL) synchronization channel (SCH) is provided for wireless OFDM/OFDMA systems. The SCH includes a Primary SCH (P-SCH) for carrying PA-Preambles used for coarse timing and frequency synchronization, and a Secondary SCH (S-SCH) for carrying SA-Preambles used for cell ID detection. The total time length occupied by P-SCH and S-SCH is equal to one OFDM symbol time length of a data channel, and S-SCH is located in front of P-SCH in each DL frame. A perfect multi-period time-domain structure is created and maintained in P-SCH to increase preciseness of frame boundary estimation. With overlapping deployment of macrocells and femtocells, a predefined SCH configuration scheme is provided to separate frequency subbands used for macrocells and femtocells such that interferences in S-SCH can be mitigated. In addition, a self-organized SCH configuration scheme is provided to allow more flexibility for femtocells to avoid or introduce interference in S-SCH. |
申请公布号 |
EP2384596(A4) |
申请公布日期 |
2016.03.30 |
申请号 |
EP20090836093 |
申请日期 |
2009.12.31 |
申请人 |
MEDIATEK INC. |
发明人 |
LIAO, PEI-KAI;CHANG, YU-HAO;WU, KUO-MING |
分类号 |
H04W56/00;H04L5/00;H04L27/26;H04W72/04 |
主分类号 |
H04W56/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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