Physical resource block PRB grid indication method and device
A method for wireless communication and an apparatus are provided, comprising: determining location information, wherein the location information indicating a quantity of M subcarrier spacings between a second location of 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; sending the location information via a broadcast message.
1. A physical resource block (PRB) grid indication method, performed by a network device, or, a chip for the network device, the method comprising:
sending a synchronization signal block to a terminal device;
wherein the synchronization signal block comprises a primary synchronization signal, a secondary synchronization signal, and a physical broadcast channel, and a PRB grid of the synchronization signal block comprises A PRBs, wherein a quantity of subcarriers carrying a synchronization sequence modulation signal in the primary synchronization signal is B, a quantity of subcarriers carrying a synchronization sequence modulation signal in the secondary synchronization signal is B, and a quantity of subcarriers carrying a physical broadcast channel modulation signal in the physical broadcast channel signal is C, wherein A, B, and C are positive integers, and B is not equal to C; and
in frequency domain, at least one of a first subcarrier carrying the synchronization sequence modulation signal in the primary synchronization signal or a first subcarrier carrying the synchronization sequence modulation signal in the secondary synchronization signal has the same frequency as or is aligned with a Dth subcarrier carrying the physical broadcast channel modulation signal in the physical broadcast channel, and wherein D is an integer greater than or equal to 1 and less than or equal to C−B+1, but is not equal to 73.
2. The method according to claim 1 , wherein the synchronization signal block occupies a plurality of orthogonal frequency division multiplexing (OFDM) symbols in time domain, a second OFDM symbol and a third OFDM symbol of the synchronization signal block are nonconsecutive, and a distance between the second OFDM symbol and the third OFDM symbol is one OFDM symbol.
3. The method according to claim 1 , wherein:
wherein the synchronization signal block occupies a plurality of orthogonal frequency division multiplexing (OFDM) symbols in time domain, a third OFDM symbol and a fourth OFDM symbol of the synchronization signal block are nonconsecutive, and a distance between the third OFDM symbol and the fourth OFDM symbol is one OFDM symbol.
4. The method according to claim 1 , further comprising:
sending scheduling information to the terminal device, wherein the scheduling information is used to schedule the terminal device on a specified PRB, a first predetermined location of the specified SSB and a second predetermined location of the specified PRB having an offset of M subcarrier spacings plus N PRBs, and the specified PRB is a beginning PRB in a control resource in a system common PRB grid, and wherein both M and N are greater than or equal to 0.
5. The method according to claim 4 , wherein the specified PRB is in a system common PRB grid with a subcarrier spacing in a system bandwidth.
6. The method according to claim 4 , wherein the specified PRB is determined based on predetermined information.
7. The method according to claim 6 , wherein
the predetermined information indicates a location of a PRB in the system common PRB grids with different subcarrier spacings in any one system bandwidth of at least one system bandwidth.
8. An apparatus, comprising at least one processor, wherein:
the at least one processor is configured to execute a program in a memory to cause the apparatus to perform the following processes:
receiving a synchronization signal block from a network device;
wherein the synchronization signal block comprises a primary synchronization signal, a secondary synchronization signal, and a physical broadcast channel, and a physical resource block (PRB) grid of the synchronization signal block comprises A PRBs, wherein a quantity of subcarriers carrying a synchronization sequence modulation signal in the primary synchronization signal is B, a quantity of subcarriers carrying a synchronization sequence modulation signal in the secondary synchronization signal is B, and a quantity of subcarriers carrying a physical broadcast channel modulation signal in the physical broadcast channel signal is C, wherein A, B, and C are positive integers, and B is not equal to C; and
in frequency domain, at least one of a first subcarrier carrying the synchronization sequence modulation signal in the primary synchronization signal or a first subcarrier carrying the synchronization sequence modulation signal in the secondary synchronization signal has the same frequency as or is aligned with a Dth subcarrier carrying the physical broadcast channel modulation signal in the physical broadcast channel, and wherein D is an integer greater than or equal to 1 and less than or equal to C−B+1, but is not equal to 73.
9. The apparatus according to claim 8 , wherein:
the synchronization signal block occupies a plurality of orthogonal frequency division multiplexing (OFDM) symbols in time domain, a second OFDM symbol and a third OFDM symbol of the synchronization signal block are nonconsecutive, and a distance between the second OFDM symbol and the third OFDM symbol is one OFDM symbol.
10. The apparatus according to claim 8 , wherein:
the synchronization signal block occupies a plurality of orthogonal frequency division multiplexing (OFDM) symbols in time domain, a third OFDM symbol and a fourth OFDM symbol of the synchronization signal block are nonconsecutive, and a distance between the third OFDM symbol and the fourth OFDM symbol is one OFDM symbol.
11. The apparatus according to claim 8 , wherein the at least one processor is further configured to execute the program in the memory to cause the apparatus to perform the following processes:
receiving scheduling information from the network device, wherein the scheduling information is used to schedule a terminal device which the apparatus is or is for on a specified PRB, a first predetermined location of the specified SSB and a second predetermined location of the specified PRB having an offset of M subcarrier spacings plus N PRBs, and the specified PRB is a beginning PRB in a control resource in a system common PRB grid, and wherein both M and N are greater than or equal to 0.
12. The apparatus according to claim 11 , wherein the specified PRB is in the system common PRB grid with a subcarrier spacing in a system bandwidth.
13. The apparatus according to claim 11 , wherein the specified PRB is determined based on predetermined information.
14. The apparatus according to claim 13 , wherein
the predetermined information indicates a location of a PRB in the system common PRB grids with different subcarrier spacings in any one system bandwidth of at least one system bandwidth.
15. An apparatus, comprising at least one processor, wherein:
the at least one processor is configured to execute a program in a memory to cause the apparatus to perform the following processes:
sending a synchronization signal block to a terminal device;
wherein the synchronization signal block comprises a primary synchronization signal, a secondary synchronization signal, and a physical broadcast channel, and a physical resource block (PRB) grid of the synchronization signal block comprises A PRBs, wherein a quantity of subcarriers carrying a synchronization sequence modulation signal in the primary synchronization signal is B, a quantity of subcarriers carrying a synchronization sequence modulation signal in the secondary synchronization signal is B, and a quantity of subcarriers carrying a physical broadcast channel modulation signal in the physical broadcast channel signal is C, wherein A, B, and Care positive integers, and B is not equal to C; and
in frequency domain, at least one of a first subcarrier carrying the synchronization sequence modulation signal in the primary synchronization signal or a first subcarrier carrying the synchronization sequence modulation signal in the secondary synchronization signal has the same frequency as or is aligned with a Dth subcarrier carrying the physical broadcast channel modulation signal in the physical broadcast channel, and wherein D is an integer greater than or equal to 1 and less than or equal to C−B+1, but is not equal to 73.
16. The apparatus according to claim 15 , wherein the at least one processor is further configured to execute the program in the memory to cause the apparatus to perform the following processes:
sending scheduling information to the terminal device, wherein the scheduling information is used to schedule the terminal device on a specified PRB, a first predetermined location of the specified SSB and a second predetermined location of the specified PRB having an offset of M subcarrier spacings plus N PRBs, and the specified PRB is a beginning PRB in a control resource in a system common PRB grid, wherein both M and N are greater than or equal to 0.
17. The apparatus according to claim 16 , wherein the specified PRB is in the system common PRB grid with a subcarrier spacing in a system bandwidth.
18. The apparatus according to claim 16 , wherein the specified PRB is determined based on predetermined information.
19. The apparatus according to claim 18 , wherein
the predetermined information indicates a location of a PRB in the system common PRB grids with different subcarrier spacings in any one system bandwidth of at least one system bandwidth.