Error check-based synchronization and broadcast channel
Systems, methods, and instrumentalities are disclosed for error check-based synchronization. Physical Broadcast Channel (PBCH) data may be determined. A scrambling (e.g., a first scrambling) of the PBCH data may be scrambled via a sequence (e.g., a first sequence). The first sequence may be based on a cell ID and/or timing information. Error check bits may be attached to the scrambled PBCH data and to the timing information. The error check bits may include one or more cyclic redundancy check (CRC) bits. The scrambled PBCH data, the timing information (e.g., the unscrambled timing information), and/or the attached error check bits may be polar encoded. The polar encoding may result in polar encoded bits. A scrambling (e.g., a second scrambling) of the polar encoded bits may be scrambled via a sequence (e.g., a second sequence). The first sequence and the second sequence may be different. The polar encoded bits may be transmitted.
1. A network device, comprising:
a processor configured to:
determine Physical Broadcast Channel (PBCH) data;
perform a first scrambling of the PBCH data via a first sequence, wherein the first sequence is a function of a cell ID and timing information;
attach error check bits to the scrambled PBCH data and to the timing information, wherein the error check bits comprise one or more cyclic redundancy check (CRC) bits and the timing information is unscrambled;
polar encode the scrambled PBCH data, the unscrambled timing information, and the attached error check bits, wherein the polar encoding results in polar encoded bits; and
perform a second scrambling of the polar encoded bits via a second sequence.
2. The network device of claim 1 , wherein the timing information comprises at least one of a system frame number, a subset of a system frame number, a half radio frame number, or a synchronization signal (SS) block index.
3. The network device of claim 1 , wherein the first sequence and the second sequence are different.
4. The network device of claim 1 , wherein the processor is further configured to transmit the scrambled polar encoded bits.
5. The network device of claim 4 , wherein the processor is further configured to transmit the scrambled polar encoded bits via a waveform.
6. The network device of claim 4 , wherein the PBCH data is new radio (NR)-PBCH data.
7. A method, comprising:
determining Physical Broadcast Channel (PBCH) data;
performing a first scrambling of the PBCH data via a first sequence, wherein the first sequence is a function of a cell ID and timing information;
attaching error check bits to the scrambled PBCH data and to the timing information, wherein the error check bits comprise one or more cyclic redundancy check (CRC) bits and the timing information is unscrambled;
polar encoding the scrambled PBCH data, the unscrambled timing information, and the attached error check bits, wherein the polar encoding results in polar encoded bits; and
performing a second scrambling of the polar encoded bits via a second sequence.
8. The method of claim 7 , wherein the timing information comprises at least one of a system frame number, a subset of a system frame number, a half radio frame number, or a synchronization signal (SS) block index.
9. The method of claim 7 , wherein the first sequence and the second sequence are different.
10. The method of claim 7 , further comprising transmitting the scrambled polar encoded bits.
11. The method of claim 10 , further comprising transmitting the scrambled polar encoded bits via a waveform.
12. The method of claim 10 , wherein the PBCH data is new radio (NR)-PBCH data.