Methods and apparatus to transmit and receive synchronization signal and system information in a wireless communication system
A base station transmits a plurality of primary synchronization channel (PSC) symbols to a mobile station in a slot of a subframe of a frame-based wireless communication system. The base station also transmits a plurality of secondary synchronization channel (SSC) symbols to the mobile station in the slot of the subframe. The mobile station determines a preferred receiver beam based on the plurality of received consecutive PSC symbols.
1. A method for use in a base station, the method comprising:
transmitting a plurality of primary synchronization channel (PSC) symbols to a mobile station in a slot of a subframe of a frame-based wireless communication system; and
transmitting a plurality of secondary synchronization channel (SSC) symbols to the mobile station in the slot of the subframe, wherein a gap separates the plurality of PSC symbols from the plurality of SSC symbols within the slot of the subframe, and the gap is at least one Orthogonal Frequency Division Multiplexing (OFDM) symbol long.
2. The method of claim 1 , further comprising:
transmitting a plurality of broadcast control channel (BCH) symbols to the mobile station in the slot of the subframe.
3. The method of claim 1 , wherein the plurality of PSC symbols comprise consecutive symbols in the slot.
4. The method of claim 3 , further comprising:
generating the plurality of consecutive PSC symbols by repeating a sequence of segments, each segment comprising a plurality of samples.
5. The method of claim 4 , wherein a number of segments in each PSC symbol is based in part on a length of a cyclic prefix of the each PSC symbol.
6. The method of claim 3 , wherein the plurality of consecutive PSC symbols are used by the mobile station to determine a preferred receiver beam.
7. The method of claim 1 , wherein a detection of the PSC symbols is attempted by the mobile station using each of a plurality of receiver beams and, when a received signal strength associated with the PSC symbols is greater than a predetermined threshold, the mobile station determines that the PSC is detected.
8. A base station, comprising:
a transmitter path configured to:
transmit a plurality of primary synchronization channel (PSC) symbols to a mobile station in a slot of a subframe of a frame-based wireless communication system; and
transmit a plurality of secondary synchronization channel (SSC) symbols to the mobile station in the slot of the subframe, wherein a gap separates the plurality of PSC symbols from the plurality of SSC symbols within the slot of the subframe, and the gap is at least one Orthogonal Frequency Division Multiplexing (OFDM) symbol long.
9. The base station of claim 8 , the transmitter path further configured to:
transmit a plurality of broadcast control channel (BCH) symbols to the mobile station in the slot of the subframe.
10. The base station of claim 8 , wherein the plurality of PSC symbols comprise consecutive symbols in the slot.
11. The base station of claim 10 , the transmitter path further configured to:
generate the plurality of consecutive PSC symbols by repeating a sequence of segments, each segment comprising a plurality of samples.
12. The base station of claim 11 , wherein a number of segments in each PSC symbol is based in part on a length of a cyclic prefix of the each PSC symbol.
13. The base station of claim 10 , wherein the plurality of consecutive PSC symbols are used by the mobile station to determine a preferred receiver beam.
14. The base station of claim 8 , wherein a detection of the PSC symbols is attempted by the mobile station using each of a plurality of receiver beams and, when a received signal strength associated with the PSC symbols is greater than a predetermined threshold, the mobile station determines that the PSC is detected.
15. A mobile station, comprising:
a receiver path configured to:
receive a plurality of primary synchronization channel (PSC) symbols from a base station in a slot of a subframe of a frame-based wireless communication system; and
receive a plurality of secondary synchronization channel (SSC) symbols from the base station in the slot of the subframe, wherein a gap separates the plurality of PSC symbols from the plurality of SSC symbols within the slot of the subframe, and the gap is at least one Orthogonal Frequency Division Multiplexing (OFDM) symbol long.
16. The mobile station of claim 15 , the receiver path further configured to:
receive a plurality of broadcast control channel (BCH) symbols from the base station in the slot of the subframe.
17. The mobile station of claim 15 , wherein the plurality of PSC symbols comprise consecutive symbols in the slot.
18. The mobile station of claim 17 , wherein the plurality of consecutive PSC symbols is generated by repeating a sequence of segments, each segment comprising a plurality of samples.
19. The mobile station of claim 18 , wherein a number of segments in each PSC symbol is based in part on a length of a cyclic prefix of the each PSC symbol.
20. The mobile station of claim 17 , the receiver path further configured to:
determine a preferred receiver beam based on the plurality of received consecutive PSC symbols.
21. The mobile station of claim 15 , the receiver path further configured to:
attempt to detect the PSC symbols using each of a plurality of receiver beams; and
determine that the PSC is detected when a received signal strength associated with the PSC symbols is greater than a predetermined threshold.