Synchronization signal transmission techniques
Systems and methods for synchronizing communications between a User Equipment (UE) and Base Station (BS) using a synchronization signal structure. The synchronization signal structure can include a sequence of Synchronization Signals (SS) 5 including repetitions of a synchronization signal burst set. The synchronization signal burst set can include a plurality of synchronization signal bursts. The synchronization signal bursts can include a plurality of synchronization signal blocks, wherein the synchronization signal blocks can include a plurality of Synchronization Signals (SS).
1. An apparatus of a user equipment (UE) operable to synchronize with a New Radio (NR) cell, the apparatus comprising:
one or more processors configured to:
search a plurality of frequency ranges to detect a synchronization signal/physical broadcast channel (SS/PBCH) block, wherein to detect the SS comprises to cross-correlate synchronization signal blocks within a synchronization signal burst set;
decode, at the UE, the SS/PBCH block that includes a PBCH, a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) in consecutive symbols; and
perform, at the UE, a synchronization with the NR cell based in part on the SS/PBCH block, wherein the synchronization includes a time and frequency synchronization between the UE and the NR cell; and
a memory interface configured to send to a memory the SS/PBCH block.
2. The apparatus of claim 1 , further comprising a transceiver configured to receive the SS/PBCH block at the UE.
3. The apparatus of claim 1 , wherein the SS/PBCH block is in accordance with a 15 kilohertz (kHz) subcarrier spacing.
4. The apparatus of claim 1 , wherein the one or more processors are configured to decode the SS/PBCH block received at the UE in accordance with a defined periodicity.
5. The apparatus of claim 4 , wherein the defined periodicity is a half frame.
6. An apparatus of a user equipment (UE) of a millimeter wave new radio system operable to synchronize communication with a base station (BS), the apparatus comprising:
a memory interface configured to access synchronization parameters in a memory; and
one or more processors configured to:
search a plurality of frequency ranges to detect synchronization signals (SS), wherein to detect the SS comprises to cross-correlate synchronization signal blocks within a synchronization signal burst set;
decode, for a plurality of beams, a sequence of SS according to one or more accessed synchronization parameters, the sequence of SS including:
repetitions of the synchronization signal burst set, the synchronization signal burst set including:
a plurality of synchronization signal bursts, the synchronization signal bursts including:
a plurality of synchronization signal blocks, the synchronization signal blocks including:
a plurality of SS; and
synchronize with a given BS based on the decoded SS.
7. The apparatus of claim 6 , further comprising a transceiver configured to receive the sequence of SS.
8. The apparatus of claim 6 , wherein the synchronization parameters include the periodicity of the synchronization signal burst set.
9. The apparatus of claim 6 , wherein the synchronization parameters include the duration of the synchronization signal burst set.
10. The apparatus of claim 6 , wherein a synchronization signal block with a particular synchronization signal block index has a particular periodicity.
11. The apparatus of claim 6 , wherein synchronization signal blocks with different synchronization signal block index numbers represent SS transmitted in different time instances over a half radio frame period.
12. The apparatus of claim 6 , wherein synchronization signal blocks are consecutive within a synchronization signal burst.
13. At least one non-transitory machine readable storage medium having instructions embodied thereon for synchronizing communication between a user equipment (UE) and a base station (BS), the instructions when executed by one or more processors at the UE perform the following:
searching a plurality of frequency ranges to detect synchronization signals (SS) wherein detection of the SS includes cross-correlating synchronization signal blocks within a synchronization signal burst set;
decoding, for a plurality of beams, a sequence of SS according to one or more accessed synchronization parameters, the sequence of SS including:
repetitions of the synchronization signal burst set, the synchronization signal burst set including:
a plurality of synchronization signal bursts, the synchronization signal bursts including:
a plurality of synchronization signal blocks, the synchronization signal blocks including:
a plurality of SS; and
synchronizing with a given BS based on the decoded SS.
14. The at least one non-transitory machine readable storage medium of claim 13 , wherein the synchronization parameters include the periodicity of the synchronization signal burst set.
15. The at least one non-transitory machine readable storage medium of claim 13 , wherein the synchronization parameters include the duration of the synchronization signal burst set.
16. The at least one non-transitory machine readable storage medium of claim 13 , wherein a synchronization signal block with a particular synchronization signal block index has a particular periodicity.
17. The at least one non-transitory machine readable storage medium of claim 13 , wherein synchronization signal blocks with different synchronization signal block index numbers represent SS transmitted in different time instances over a half radio frame period.
18. The at least one non-transitory machine readable storage medium of claim 13 , wherein synchronization signal blocks are consecutive within a synchronization signal burst.