Transmission of physical broadcast channel for new radio
Methods, systems, and devices for wireless communications are described. In one example, a method includes selecting between a first frequency range and a second frequency range to transmit a physical channel, the second frequency range being higher than the first frequency range, and jointly encoding at least two fields of the physical channel based at least in part on the selected frequency range. In some cases, the method includes selecting between a first frequency range and a second frequency range to transmit a physical channel. In some cases, the second frequency range is higher than the first frequency range. The method may further include adjusting a quantity of bits associated with a field of the physical channel based at least in part on the selected frequency range.
1. A method for wireless communication, comprising:
selecting between a first frequency range and a second frequency range to transmit a physical channel, wherein the second frequency range comprises an above-6 GHz frequency range and the first frequency range comprises a sub-6 GHz frequency range; and
jointly encoding at least two fields of the physical channel based at least in part on the selected frequency range, wherein a field from the at least two fields of the physical channel comprises an indication of a remaining system information (RMSI) associated with a sync signal block (SSB).
2. The method of claim 1 , wherein jointly encoding the at least two fields comprises:
jointly encoding a default downlink (DL) numerology field with a physical resource block (PRB) grid offset field of the physical channel.
3. The method of claim 1 , further comprising:
jointly encoding the at least two fields of the physical channel using 5 bits.
4. The method of claim 3 , wherein the 5 bits indicate a numerology of the RMSI and an offset between an SSB resource block (RB) grid and a common physical resource block (PRB) grid.
5. The method of claim 4 , further comprising:
identifying a numerology of the SSB.
6. The method of claim 5 , wherein the 5 bits indicate a subset of possible offsets between the SSB RB grid and the common PRB grid based at least in part on the identified numerology of the SSB and the numerology of the RMSI.
7. The method of claim 4 , wherein the numerology of the RMSI indicates a subcarrier spacing (SCS) of the physical channel carrying the RMSI in the first frequency range or an SCS of the physical channel carrying the RMSI in the second frequency range.
8. The method of claim 1 , wherein one or more available bits in a physical resource block (PRB) grid offset field comprises a second indication of no RMSI being associated with the SSB.
9. The method of claim 1 , wherein a subcarrier spacing of the first frequency range is 15 kHz or 30 kHz and the subcarrier spacing of the second frequency range is 60 kHz or 120 kHz.
10. The method of claim 1 , wherein the physical channel comprises a physical broadcast channel (PBCH).
11. A method for wireless communication, comprising:
receiving a transmission of a physical channel on a first frequency range or a second frequency range, wherein the second frequency range comprises an above-6 GHz frequency range and the first frequency range comprises a sub-6 GHz frequency range; and
decoding at least two fields of the physical channel that were jointly encoded based at least in part on a frequency range used to transmit the physical channel, wherein a field from the at least two fields of the physical channel comprises an indication of a remaining system information (RMSI) associated with a sync signal block (SSB).
12. The method of claim 11 , wherein the at least two fields comprise a default downlink (DL) numerology field and a physical resource block (PRB) grid offset field.
13. The method of claim 11 , wherein the at least two fields are jointly encoded using 5 bits.
14. The method of claim 13 , further comprising:
identifying a numerology of an RMSI and an offset between an SSB resource block (RB) grid and a common physical resource block (PRB) grid based at least in part on the 5 bits.
15. The method of claim 11 , wherein one or more available bits in a physical resource block (PRB) grid offset field comprises a second indication of no RMSI being associated with the SSB.
16. The method of claim 11 , wherein a subcarrier spacing of the first frequency range is 15 kHz or 30 kHz and the subcarrier spacing of the second frequency range is 60 kHz or 120 kHz.
17. The method of claim 11 , wherein the physical channel comprises a physical broadcast channel (PBCH).
18. An apparatus for wireless communication, comprising:
a processor;
memory in electronic communication with the processor; and
instructions stored in the memory and executable by the processor to cause the apparatus to:
select between a first frequency range and a second frequency range to transmit a physical channel, wherein the second frequency range comprises an above-6 GHz frequency range and the first frequency range comprises a sub-6 GHz frequency range; and
jointly encode at least two fields of the physical channel based at least in part on the selected frequency range, wherein a field from the at least two fields of the physical channel comprises an indication of a remaining system information (RMSI) associated with a sync signal block (SSB).
19. The apparatus of claim 18 , wherein the instructions are further executable by the processor to cause the apparatus to:
jointly encode a default downlink (DL) numerology field with a physical resource block (PRB) grid offset field of the physical channel.
20. The apparatus of claim 18 , wherein the instructions are further executable by the processor to cause the apparatus to:
jointly encode the at least two fields of the physical channel using 5 bits.
21. The apparatus of claim 20 , wherein the 5 bits indicate a numerology of an RMSI and an offset between an SSB resource block (RB) grid and a common physical resource block (PRB) grid.
22. The apparatus of claim 21 , wherein the instructions are further executable by the processor to cause the apparatus to:
identify a numerology of the SSB.
23. An apparatus for wireless communication, comprising:
a processor;
memory in electronic communication with the processor; and
instructions stored in the memory and executable by the processor to cause the apparatus to:
receive a transmission of a physical channel on a first frequency range or a second frequency range, wherein the second frequency range comprises an above-6 GHz frequency range and the first frequency range comprises a sub-6 GHz frequency range; and
decode at least two fields of the physical channel that were jointly encoded based at least in part on a frequency range used to transmit the physical channel, wherein a field from the at least two fields of the physical channel comprises an indication of a remaining system information (RMSI) associated with a sync signal block (SSB).
24. The apparatus of claim 23 , wherein the at least two fields comprise a default downlink (DL) numerology field and a physical resource block (PRB) grid offset field.
25. The apparatus of claim 23 , wherein the at least two fields are jointly encoded using 5 bits.
26. The apparatus of claim 25 , wherein the instructions are further executable by the processor to cause the apparatus to:
identify a numerology of an RMSI and an offset between an SSB resource block (RB) grid and a common physical resource block (PRB) grid based at least in part on the 5 bits.
27. The apparatus of claim 23 , further comprising:
a receiver in electronic communication with the processor, wherein the instructions are further executable by the processor to cause the receiver to receive the transmission of the physical channel, wherein the first frequency range comprises 15 kHz or 30 kHz subcarrier spacing (SCS) and the second frequency range comprises 60 kHz or 120 kHz SCS.
28. The apparatus of claim 23 , wherein the physical channel comprises a physical broadcast channel (PBCH).
29. The apparatus of claim 18 , wherein a subcarrier spacing of the first frequency range is 15 kHz or 30 kHz and the subcarrier spacing of the second frequency range is 60 kHz or 120 kHz.
30. The apparatus of claim 23 , wherein a subcarrier spacing of the first frequency range is 15 kHz or 30 kHz and the subcarrier spacing of the second frequency range is 60 kHz or 120 kHz.