Communication of synchronization signals between base station and terminal
Present document is related with communication of synchronization signals between base station and terminal. The base station acquires a primary synchronization signal generated using a Constant Amplitude Zero Auto-Correlation (CAZAC) sequence having a root index M and having a length L, and a secondary synchronization signal informing a cell group ID. And, the base station transmits the primary synchronization signal at a last symbol of a specific time domain unit to one or more terminals, and the secondary synchronization signal at a second-to-last symbol of the specific time domain unit to the one or more terminals. Here, the root index M is one among a root index set comprising m 0 and m 1 meeting “m 0 +m 1 =(½*L)*n” or “m 0 −m 1 =±(½*L)*n”, where ‘n’ is an integer greater than 0.
1. A method for transmitting synchronization signals from a base station, the method comprising:
acquiring a primary synchronization signal generated using a Constant Amplitude Zero Auto-Correlation (CAZAC) sequence having a root index M and having a length L;
acquiring a secondary synchronization signal informing a cell group ID;
transmitting the primary synchronization signal at a last symbol of a specific time domain unit to one or more terminals; and
transmitting the secondary synchronization signal at a second-to-last symbol of the specific time domain unit to the one or more terminals,
wherein the root index M is one among a root index set comprising m 0 and m 1 meeting
m 0 +m 1 =(½ *L )* n
or
m 0 −m 1 =±(½ *L )* n , and
wherein n is an integer greater than 0.
2. The method of claim 1 , wherein the primary synchronization signal is for time and frequency synchronization.
3. The method of claim 1 , wherein the primary synchronization signal is distinguished from other primary synchronization signal based on a correlation operation.
4. A method for receiving synchronization signals at a terminal, the method comprising:
receiving a primary synchronization signal at a last symbol of a specific time domain unit from a base station; and
receiving a secondary synchronization signal informing a cell group ID at a second-to-last symbol of the specific time domain unit from the base station,
wherein the primary synchronization signal is generated using a Constant Amplitude Zero Auto-Correlation (CAZAC) sequence having a root index M and having a length L,
wherein the root index M is one among a root index set comprising m 0 and m 1 meeting
m 0 +m 1 =(½ *L )* n
or
m 0 −m 1 =±(½ *L )* n , and
wherein n is an integer greater than 0.
5. The method of claim 4 , wherein the primary synchronization signal is for time and frequency synchronization.
6. The method of claim 4 , wherein the primary synchronization signal is distinguished from other primary synchronization signal based on a correlation operation.
7. A base station for transmitting synchronization signals, the base station comprising:
a processor for acquiring a primary synchronization signal generated using a Constant Amplitude Zero Auto-Correlation (CAZAC) sequence having a root index M and having a length L, and a secondary synchronization signal informing a cell group ID,
a transmitter for transmitting the primary synchronization signal at a last symbol of a specific time domain unit, and the secondary synchronization signal at a second-to-last symbol of the specific time domain unit, to the one or more terminals,
wherein the root index M is one among a root index set comprising m 0 and m 1 meeting
m 0 +m 1 =(½ *L )* n
or
m 0 −m 1 =±(½ *L )* n , and
wherein n is an integer greater than 0.
8. The base station of claim 7 , wherein the primary synchronization signal is for time and frequency synchronization.
9. The base station of claim 7 , wherein the primary synchronization signal is distinguished from other primary synchronization signal based on a correlation operation.
10. A terminal for receiving synchronization signals, the terminal comprising:
a receiver for receiving a primary synchronization signal at a last symbol of a specific time domain unit, and a secondary synchronization signal informing a cell group ID at a second-to-last symbol of the specific time domain unit from the base station,
wherein the primary synchronization signal is generated using a Constant Amplitude Zero Auto-Correlation (CAZAC) sequence having a root index M and having a length L,
wherein the root index M is one among a root index set comprising m 0 and m 1 meeting
m 0 +m 1 =(½ *L )* n
or
m 0 −m 1 =±(½ *L )* n , and
wherein n is an integer greater than 0.
11. The terminal of claim 10 , wherein the primary synchronization signal is for time and frequency synchronization.
12. The terminal of claim 10 , wherein the primary synchronization signal is distinguished from other primary synchronization signal based on a correlation operation.