Techniques and apparatuses for wakeup signal transmission
A method, an apparatus, a base station, a user equipment (UE), and a computer program product for wireless communication are provided. The base station may encode a wakeup signal so that a preamble of the wakeup signal indicates whether the wakeup signal is relevant to the UE. The UE may select a technique for detecting the wakeup signal based at least in part on a partial, full, or no synchronization. In some aspects, the wakeup signal may be encoded with a system frame number. In some aspects, wakeup signals for guardband/standalone UEs are provided. Numerous other aspects are provided.
1. A method of wireless communication performed by a base station, comprising:
generating a wakeup signal for a user equipment (UE) in a guardband mode or a standalone mode (GB/SA mode),
wherein the wakeup signal is based at least in part on a first base sequence associated with a first deployment mode, wherein the first base sequence includes more symbols than a second base sequence associated with a second deployment mode, wherein the first base sequence includes the second base sequence, wherein the first deployment mode is the GB/SA mode, and wherein the second deployment mode is an inband mode; and
transmitting the wakeup signal.
2. The method of claim 1 , where the first base sequence is a 14-symbol sequence, and the second base sequence is an 11-symbol sequence.
3. The method of claim 1 , wherein the first base sequence further includes one or more additional values from the second base sequence.
4. The method of claim 3 , wherein the one or more additional values are selected from an interior of the second base sequence.
5. The method of claim 4 , wherein the one or more additional values are mapped to a first 3 symbols of a first slot in a subframe and are selected from the interior of the second base sequence, and wherein the interior of the second base sequence includes a first 3 symbols of a second slot in the subframe.
6. The method of claim 1 , wherein the first base sequence is generated using a same Zadoff-Chu sequence and a same cover code as the second base sequence.
7. The method of claim 1 , wherein time-domain scrambling of the first base sequence is performed on a symbol level and is varied in time.
8. The method of claim 7 , wherein the time-domain scrambling is based at least in part on a pseudorandom noise (PN) sequence that is based at least in part on at least one of a cell identifier or a time index combined with the first base sequence per subframe.
9. A method of wireless communication performed by a user equipment (UE), comprising:
receiving a wakeup signal in a guardband mode or a standalone mode (GB/SA mode),
wherein the wakeup signal is based at least in part on a first base sequence associated with a first deployment mode, wherein the first base sequence includes more symbols than a second base sequence associated with a second deployment mode, wherein the first base sequence includes the second base sequence, wherein the first deployment mode is the GB/SA mode, and wherein the second deployment mode is an inband mode; and
performing a wakeup based at least in part on the wakeup signal.
10. The method of claim 3 , wherein the one or more additional values are selected from an end of the second base sequence.
11. The method of claim 9 , where the first base sequence is a 14-symbol sequence, and the second base sequence is an 11-symbol sequence.
12. The method of claim 9 , wherein the first base sequence further includes one or more additional values from the second base sequence.
13. The method of claim 12 , wherein the one or more additional values are selected from an interior of the second base sequence.
14. The method of claim 13 , wherein the one or more additional values are mapped to a first 3 symbols of a first slot in a subframe and are selected from the interior of the second base sequence, and wherein the interior of the second base sequence includes a first 3 symbols of a second slot in the subframe.
15. The method of claim 9 , wherein the first base sequence is generated using a same Zadoff-Chu sequence and a same cover code as the second base sequence.
16. The method of claim 9 , wherein time-domain scrambling of the first base sequence is performed on a symbol level and is varied in time.
17. The method of claim 16 , wherein the time-domain scrambling is based at least in part on a pseudorandom noise (PN) sequence that is based at least in part on at least one of a cell identifier or a time index combined with the first base sequence per subframe.
18. The method of claim 12 , wherein the one or more additional values are selected from an end of the second base sequence.
19. A user equipment (UE) for wireless communication, comprising:
a memory; and
one or more processors operatively coupled to the memory, the memory and the one or more processors configured to:
receive a wakeup signal in a guardband mode or a standalone mode (GB/SA mode),
wherein the wakeup signal is based at least in part on a first base sequence associated with a first deployment mode, wherein the first base sequence includes more symbols than a second base sequence associated with a second deployment mode, wherein the first base sequence includes the second base sequence,
wherein the first deployment mode is the GB/SA mode, and wherein the second deployment mode is an inband mode; and
perform a wakeup based at least in part on the wakeup signal.
20. The UE of claim 19 , where the first base sequence is a 14-symbol sequence, and the second base sequence is a 11-symbol sequence.
21. The UE of claim 19 , wherein the first base sequence further includes one or more additional values from the second base sequence.
22. The UE of claim 21 , wherein the one or more additional values are selected from an interior of the second base sequence.
23. The UE of claim 22 , wherein the one or more additional values are mapped to a first 3 symbols of a first slot in a subframe and are selected from the interior of the second base sequence, and wherein the interior of the second base sequence includes a first 3 symbols of a second slot in the subframe.
24. The UE of claim 19 , wherein the first base sequence is generated using a same Zadoff-Chu sequence and a same cover code as the second base sequence.
25. The UE of claim 19 , wherein time-domain scrambling of the first base sequence is performed on a symbol level and is varied in time.
26. The UE of claim 25 , wherein the time-domain scrambling is based at least in part on a pseudorandom noise (PN) sequence that is based at least in part on at least one of a cell identifier or a time index combined with the first base sequence per subframe.
27. The UE of claim 21 , wherein the one or more additional values are selected from an end of the second base sequence.
28. A base station for wireless communication, comprising:
a memory; and
one or more processors operatively coupled to the memory, the memory and the one or more processors configured to:
generate a wakeup signal for a user equipment (UE) in a guardband mode or a standalone mode (GB/SA mode),
wherein the wakeup signal is based at least in part on a first base sequence associated with a first deployment mode, wherein the first base sequence includes more symbols than a second base sequence associated with a second deployment mode, wherein the first base sequence includes the second base sequence,
wherein the first deployment mode is the GB/SA mode, and wherein the second deployment mode is an inband mode; and
transmit the wakeup signal.
29. The base station of claim 28 , where the first base sequence is a 14-symbol sequence, and the second base sequence is a 11-symbol sequence.
30. The base station of claim 28 , wherein the first base sequence further includes one or more additional values from the second base sequence.
31. The base station of claim 30 , wherein the one or more additional values are selected from an interior of the second base sequence.
32. The base station of claim 31 , wherein the one or more additional values are mapped to a first 3 symbols of a first slot in a subframe and are selected from the interior of the second base sequence, and wherein the interior of the second base sequence includes a first 3 symbols of a second slot in the subframe.
33. The base station of claim 28 , wherein the first base sequence is generated using a same Zadoff-Chu sequence and a same cover code as the second base sequence.
34. The base station of claim 28 , wherein time-domain scrambling of the first base sequence is performed on a symbol level and is varied in time.
35. The base station of claim 34 , wherein the time-domain scrambling is based at least in part on a pseudorandom noise (PN) sequence that is based at least in part on at least one of a cell identifier or a time index combined with the first base sequence per subframe.
36. The base station of claim 30 , wherein the one or more additional values are selected from an end of the second base sequence.