Bandwidth selection method and base station for citizens broadband radio service

A bandwidth selection method for a citizens broadband radio service, the bandwidth selection method being suitable for a base station and comprising:

• receiving a spectrum resource configuration from a spectrum access system, wherein the spectrum resource configuration indicates at least one available frequency band, and the at least one available frequency band comprises a priority access licensed frequency band or a general authorized access frequency band;
• determining a selected bandwidth in a spectrum of the citizens broadband radio service as a working bandwidth of the base station, wherein the selected bandwidth comprises a part or all of the available frequency band;
• selecting a candidate frequency band from the available frequency band in the selected bandwidth, wherein the candidate frequency band is configured to activate a bandwidth part, wherein the available frequency band in the selected bandwidth comprises a first candidate frequency band and a second candidate frequency band;
• selecting the first candidate frequency band, wherein the first candidate frequency band is configured to activate the bandwidth part to provide a service to a plurality of user equipment;
• and
• activating the bandwidth part in the second candidate frequency band and switching a first user equipment among the plurality of user equipment from the first candidate frequency band to the second candidate frequency band in response to a determination of a number of the plurality of user equipment served by the first candidate frequency band being greater than a threshold.