Method and apparatus for frequency band indication, and method and apparatus for frequency band determination

1 . A method for frequency band indication, performed by a base station, comprising:

sending frequency band indication information to a terminal, to indicate to the terminal an aggregated frequency band for communicating with the base station;

wherein the aggregated frequency band has a new frequency band label and comprises more than one sub-frequency band, at least two adjacent sub-frequency bands of the more than one sub-frequency band are discontinuous, the more than one sub-frequency band comprises scattered frequency bands re-farmed for 5G, and the scattered frequency bands are frequency bands unable to be used alone to meet bandwidth requirements of 5G communication services.

2 . The method according to claim 1 , wherein the more than one sub-frequency band comprises at least one of a time division duplexing sub-frequency band or a frequency division duplexing sub-frequency band.

3 . The method according to claim 1 , further comprising:

sending configuration information of at least one bandwidth part (BWP) to the terminal, to configure the at least one BWP to work in the aggregated frequency band and configure a bandwidth corresponding to each BWP.

4 . The method according to claim 3 , wherein each of the bandwidth corresponding to the BWP comprises at least one of:

a complete sub-frequency band, a partial bandwidth in a sub-frequency band, more than one complete sub-frequency band and a gap between the more than one complete sub-frequency band, or partial bandwidths in more than one sub-frequency band and a gap between the more than one sub-frequency band.

5 . The method according to claim 3 , further comprising:

sending at least one of a physical broadcast channel or a synchronization signal block on an initial BWP;

wherein the initial BWP corresponds to a complete sub-frequency band or a partial bandwidth in a sub-frequency band.

6 . The method according to claim 5 , wherein the initial BWP further corresponds to more than one complete sub-frequency band and a gap between the more than one complete sub-frequency band, or partial bandwidths in more than one sub-frequency band and a gap between the more than one sub-frequency band.

7 . The method according to claim 3 , further comprising:

sending activation instruction information to the terminal, to instruct to activate one of the at least one BWP, configured according to the configuration information, as an activated BWP;

wherein the activation instruction information comprises physical resource block (PRB) frequency domain resource sequence numbers corresponding to the activated BWP.

8 . The method according to claim 7 , wherein the terminal and the base station pre-store an association relationship between PRB frequency domain resource sequence numbers and frequency domain resources, wherein a PRB corresponding to a gap between the sub-frequency bands is pre-marked as corresponding to the gap in the association relationship.

9 . The method according to claim 1 , further comprising:

receiving capability information sent by the terminal; and

determining a frequency band supported by the terminal according to the capability information, wherein the frequency band supported by the terminal comprises the aggregated frequency band.

10 . A method for frequency band determination, performed by a terminal, comprising:

receiving frequency band indication information sent by a base station; and

determining to communicate with the base station in an aggregated frequency band according to the frequency band indication information, wherein the aggregated frequency band has a new frequency band label and comprises more than one sub-frequency band, at least two adjacent sub-frequency bands of the more than one sub-frequency band are discontinuous, the more than one sub-frequency band comprises scattered frequency bands re-farmed for 5G, and the scattered frequency bands are frequency bands unable to be used alone to meet bandwidth requirements of 5G communication services.

11 . The method according to claim 10 , wherein the more than one sub-frequency band comprises at least one of a time division duplexing sub-frequency band or a frequency division duplexing sub-frequency band.

12 . The method according to claim 10 , further comprising:

receiving configuration information of at least one bandwidth part (BWP) sent by the base station; and

determining according to the configuration information that the at least one BWP works in the aggregated frequency band and a bandwidth corresponding to each BWP.

13 . The method according to claim 12 , wherein the bandwidth corresponding to the BWP comprises at least one of:

a complete sub-frequency band, a partial bandwidth in a sub-frequency band, more than one complete sub-frequency band and a gap between the more than one complete sub-frequency band, or partial bandwidths in more than one sub-frequency band and a gap between the more than one sub-frequency band.

14 . The method according to claim 12 , further comprising:

receiving at least one of a physical broadcast channel or a synchronization signal block on an initial BWP;

wherein the initial BWP corresponds to a complete sub-frequency band or a partial bandwidth in a sub-frequency band.

15 . The method according to claim 14 , wherein the initial BWP further corresponds to more than one complete sub-frequency band and a gap between the more than one complete sub-frequency band, or partial bandwidths in more than one sub-frequency band and a gap between the more than one sub-frequency band.

16 . The method according to claim 12 , further comprising:

receiving activation instruction information sent by the base station; and

activating one of the at least one configured BWP as an activated BWP according to the activation instruction information, wherein the activation instruction information comprises physical resource block (PRB) frequency domain resource sequence numbers corresponding to the activated BWP.

17 . The method according to claim 16 , wherein the terminal and the base station pre-store an association relationship between PRB frequency domain resource sequence numbers and frequency domain resources, wherein a PRB corresponding to a gap between the sub-frequency bands is pre-marked as corresponding to the gap in the association relationship.

18 . The method according to claim 10 , further comprising:

sending capability information to the base station, wherein the capability information is configured to indicate a frequency band supported by the terminal, and the frequency band supported by the terminal comprises the aggregated frequency band.

19 . A base station, comprising:

a processor; and

a memory storing a computer program;

wherein the processor is configured to, in response to execution of the computer program:

send frequency band indication information to a terminal, to indicate to the terminal an aggregated frequency band for communicating with the base station;

wherein the aggregated frequency band has a new frequency band label and comprises more than one sub-frequency band, at least two adjacent sub-frequency bands of the more than one sub-frequency band are discontinuous, the more than one sub-frequency band comprises scattered frequency bands re-farmed for 5G, and the scattered frequency bands are frequency bands unable to be used alone to meet bandwidth requirements of 5G communication services.

20 . A terminal, comprising:

a processor; and

a memory storing a computer program;

wherein the processor is configured to, in response to execution of the computer program, perform the method for frequency band determination according to claim 10 .