Method and apparatus for synchronization signal design

A method of a base station for identifying synchronization signals (SSs) in a communication system, the method comprising:

• identifying a primary synchronization signal (PSS), wherein a sequence of the PSS corresponds to second information, a length of the sequence of the PSS is 127, and the sequence of the PSS is mapped to subcarriers in a first orthogonal frequency division multiplexing (OFDM) symbol within one SS block;
• identifying a secondary synchronization signal (SSS), wherein a sequence of the SSS is defined based on a second sequence and a third sequence, the sequence of the SSS corresponds to first information and the second information, a length of the sequence of the SSS is 127, and the sequence of the SSS is mapped to subcarriers in a second OFDM symbol within the one SS block;
• identifying a physical broadcast channel (PBCH) including a master information block in at least third OFDM symbol within the one SS block;
• and
• transmitting the one SS block,
• wherein the first OFDM symbol is time division multiplexed (TDMed) with the second OFDM symbol and the at least third OFDM symbol within the one SS block,
• wherein the first OFDM symbol is located prior to the second OFDM symbol ant the at least third OFDM symbol, and
• wherein a physical layer cell identifier (ID) is defined based on the first information and the second information.

A terminal for identifying synchronization signals (SSs) in a communication system, the terminal comprising:

• a transceiver configured to receive one SS block;
• and
• a controller coupled with the transceiver and configured to:
• identify a primary synchronization signal (PSS), wherein a sequence of the PSS corresponds to second information, a length of the sequence of the PSS is 127, and the sequence of the PSS is mapped to subcarriers in a first orthogonal frequency division multiplexing (OFDM) symbol within the one SS block,
• identify a secondary synchronization signal (SSS), wherein a sequence of the SSS is defined based on a second sequence and a third sequence, the sequence of the SSS corresponds to first information and the second information, a length of the sequence of the SSS is 127, and the sequence of the SSS is mapped to subcarriers in a second OFDM symbol within the one SS block, and
• identify a physical broadcast channel (PBCH) including a master information block in at least third OFDM symbol within the one SS block,
• wherein the first OFDM symbol is time division multiplexed (TDMed) with the second OFDM symbol and the at least third OFDM symbol within the one SS block,
• wherein the first OFDM symbol is located prior to the second OFDM symbol and the at least third OFDM symbol, and
• wherein a physical layer cell identifier (ID) is defined based on the first information and the second information.

A method of a user equipment for identifying synchronization signals (SSs) in a communication system, the method comprising:

• receiving one SS block;
• identifying a primary synchronization signal (PSS), wherein a sequence of the PSS corresponds to second information, a length of the sequence of the PSS is 127, and the sequence of the PSS is mapped to subcarriers in a first orthogonal frequency division multiplexing (OFDM) symbol within the one SS block;
• identifying a secondary synchronization signal (SSS), wherein a sequence of the SSS is defined based on a second sequence and a third sequence, the sequence of the SSS corresponds to first information and the second information, a length of the sequence of the SSS is 127, and the sequence of the SSS is mapped to subcarriers in a second OFDM symbol within the one SS block;
• and
• identifying a physical broadcast channel (PBCH) including a master information block in at least third OFDM symbol within the one SS block,
• wherein the first OFDM symbol is time division multiplexed (TDMed) with the second OFDM symbol and the at least third OFDM symbol within the one SS block,
• wherein the first OFDM symbol is located prior to the second OFDM symbol and the at least third OFDM symbol, and
• wherein a physical layer cell identifier (ID) is defined based on the first information and the second information.