Physical resource block PRB grid indication method and device

1. A method, applied in a communication system including a network device and a terminal device communicating with the network device, comprising:

obtaining, by the network device, location information, wherein the location information indicates an offset between a second location in a physical resource block (PRB) in a system common PRB grid and a first location in a synchronization signal block, the system common PRB grid having a first subcarrier spacing, the first location being a beginning subcarrier of the synchronization signal block and the first location overlapping with the PRB in the system common PRB grid, and the second location being a boundary location of the PRB in the system common PRB grid;

sending, by the network device, the location information via a physical broadcast channel; and

receiving, by the terminal device, the location information via the physical broadcast channel.

2. The method according to claim 1 , wherein a value of the offset is M indicating an offset of M subcarriers between the first location and the second location, M being an integer larger than or equal to 0.

3. The method according to claim 2 , wherein M is a value of a preset value set, the preset value set being {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 21, 22, 23}.

4. The method according to claim 2 , wherein M is a value of a preset value set, the preset value set being {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11}.

5. The method according to claim 2 , wherein M is a value of a preset value set, the preset value set being {0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22}, or, {0, 2, 4, 6, 8, 10}.

6. The method according to claim 1 , wherein the location information occupies 5 bits of the physical broadcast channel.

7. The method according to claim 1 , wherein the boundary location of the PRB is a left boundary location of the PRB, being a beginning subcarrier of the PRB.

8. The method according to claim 2 , wherein the first subcarrier spacing is 15 kHz or 30 kHz, and M is a value of a preset value set, the preset value set being {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23}.

9. The method according to claim 2 , wherein the first subcarrier spacing is 60 kHz or 120 kHz, and M is a value of a preset value set, the preset value set being {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11}.

10. The method according to claim 2 , wherein a subcarrier spacing of the M subcarriers is 15 kHz.

11. The method according to claim 1 , wherein the PRB comprises twelve subcarriers.

12. The method according to claim 1 , wherein the synchronization signal block comprises a primary synchronization signal, a secondary synchronization signal, and the physical broadcast channel.

13. An apparatus, comprising:

a non-transitory memory, wherein the non-transitory memory stores a program; and

a processor in communication with the non-transitory memory, wherein the processor is configured to execute the program to cause the apparatus to:

obtain a signal carrying location information, wherein the location information indicates an offset between a second location in a physical resource block (PRB) in a system common PRB grid and a first location in a synchronization signal block, the system common PRB grid having a first subcarrier spacing, the first location being a beginning subcarrier of the synchronization signal block and the first location overlapping with the PRB, and the second location being a boundary location of the PRB in the system common PRB grid, and wherein the synchronization signal block comprises a primary synchronization signal, a secondary synchronization signal, and a physical broadcast channel; and

send the signal.

14. The apparatus according to claim 13 , wherein a value of the offset is M indicating an offset of M subcarriers between the first location and the second location, M being an integer larger than or equal to 0.

15. The apparatus according to claim 14 , wherein M is a value of a preset value set, the preset value set being {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23}.

16. The apparatus according to claim 14 , wherein M is a value of a preset value set, the preset value set being {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11}.

17. The apparatus according to claim 14 , wherein M is a value of a preset value set, the preset value set being {0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22}, or, {0, 2, 4, 6, 8, 10}.

18. The apparatus according to claim 13 , wherein the signal is sent via the physical broadcast channel and the location information occupies 5 bits of the physical broadcast channel.

19. The apparatus according to claim 13 , wherein the boundary location of the PRB is a left boundary location of the PRB, being a beginning subcarrier of the PRB.

20. The apparatus according to claim 14 , wherein the first subcarrier spacing is 15 kHz or 30 kHz, and M is a value of a preset value set, the preset value set being {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23}.

21. The apparatus according to claim 14 , wherein the first subcarrier spacing is 60 kHz or 120 kHz, and M is a value of a preset value set, the preset value set being {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11}.

22. The apparatus according to claim 14 , wherein a subcarrier spacing of the M subcarriers is 15 kHz.

23. An apparatus, comprising:

a processor and a communicating circuit, wherein the processor is configured to execute a program to cause the apparatus to:

receive a physical broadcast channel through the communicating circuit; and

obtain location information carried on the physical broadcast channel, wherein the location information indicates an offset between a second location in a physical resource block (PRB) in a system common PRB grid and a first location in a synchronization signal block, the system common PRB grid having a first subcarrier spacing, the first location being a beginning subcarrier of the synchronization signal block and the first location overlapping with the PRB, and the second location being a boundary location of the PRB in the system common PRB grid; and

wherein the synchronization signal block comprises a primary synchronization signal, a secondary synchronization signal, and the physical broadcast channel.

24. The apparatus according to claim 23 , wherein a value of the offset is M indicating an offset of M subcarriers between the first location and the second location, M being an integer larger than or equal to 0.

25. The apparatus according to claim 24 , wherein M is a value of a preset value set, the preset value set being {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23}.

26. The apparatus according to claim 24 , wherein M is a value of a preset value set, the preset value set being {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11}.

27. The apparatus according to claim 24 , wherein M is a value of a preset value set, the preset value set being {0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22}, or, {0, 2, 4, 6, 8, 10}.

28. The apparatus according to claim 23 , wherein the location information occupies 5 bits of the physical broadcast channel.

29. The apparatus according to claim 23 , wherein the boundary location of the PRB is a left boundary location of the PRB, being a beginning subcarrier of the PRB.

30. The apparatus according to claim 24 , wherein the first subcarrier spacing is 15 kHz or 30 kHz, and M is a value of a preset value set, the preset value set being {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23}.

31. The apparatus according to claim 24 , wherein the first subcarrier spacing is 60 kHz or 120 kHz, and M is a value of a preset value set, the preset value set being {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11}.

32. The apparatus according to claim 24 , wherein a subcarrier spacing of the M subcarriers is 15 kHz.

33. The apparatus according to claim 23 , wherein the apparatus is a terminal device, or, a chipset for the terminal device.