Method for determining carrier center frequency and apparatus

User equipment (UE) comprises:

• a processor configured to determine a frequency band starting frequency, an absolute radio frequency channel number, a frequency band offset, and a relative radio frequency channel number;
• determine a carrier center frequency according to the frequency band starting frequency, the absolute radio frequency channel number, the frequency band offset, and the relative radio frequency channel number that are determined;
• and
• a transmitter configured to cooperate with the processor to exchange a signal with a base station according to the determined carrier center frequency;
• wherein the carrier center frequency is a downlink carrier center frequency FNBDL, and the processor determines the carrier center frequency according to:
• FNBDL=FDL_low+0.1*(NDL−NOffs-DL)+0.0025*(2MDL+1);
• wherein FDL_low is a downlink frequency band starting frequency, NDL is a downlink absolute radio frequency channel number, and NOffs-DL is a downlink frequency band offset;
• and
• MDL is a downlink relative radio frequency channel number, a value range of which comprises any one in the following set:
• −10, −9, −8, −7, −6, −5, −4, −3, −2, −1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9.

User equipment (UE) comprises:

• a processor configured to determine a frequency band starting frequency, an absolute radio frequency channel number, a frequency band offset, and a relative radio frequency channel number;
• determine a carrier center frequency according to the frequency band starting frequency, the absolute radio frequency channel number, the frequency band offset, and the relative radio frequency channel number that are determined;
• and
• a transmitter configured to cooperate with the processor to exchange a signal with a base station according to the determined carrier center frequency;
• wherein the carrier center frequency is an uplink carrier center frequency FNBUL, and the processor determines the carrier center frequency according to:
• FNBUL=FUL_low+0.1*(NUL−NOffs-UL)+0.0025*(2MUL+1);
• wherein FUL_low is an uplink frequency band starting frequency, NUL is an uplink absolute radio frequency channel number, and NOffs-UL is an uplink frequency band offset;
• and
• MUL is an uplink relative radio frequency channel number, a value range of which comprises any one in the following set:
• −10, −9, −8, −7, −6, −5, −4, −3, −2, −1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9.