Method and device for indicating sub-band configuration, and method and device for accessing sub-band

A method for accessing a sub-band, comprising:

• detecting a synchronization signal and a broadcast channel in a basic sub-band to obtain a master information block carried by the broadcast channel, and camping on a cell according to the synchronization signal;
• decoding the master information block carried by the broadcast channel to determine sub-band configuration of at least one non-basic sub-band, wherein the sub-band configuration comprises a frequency position;
• and
• accessing the at least one non-basic sub-band based on the sub-band configuration of the at least one non-basic sub-band, when data interaction through the at least one non-basic sub-band is required,
• wherein decoding the master information block carried by the broadcast channel to determine sub-band configuration of at least one non-basic sub-band comprises:
• decoding the master information block carried by the broadcast channel to obtain configuration of a common control channel, wherein the configuration of the common control channel comprises a time-frequency resource position of the common control channel;
• decoding the common control channel based on the configuration of the common control channel to determine a system information block carried by the common control channel;
• and decoding the system information block carried by the common control channel to determine the sub-band configuration of the at least one non-basic sub-band.

A device for accessing a sub-band, comprising:

• a detecting circuitry configured to detect a synchronization signal and a broadcast channel in a basic sub-band to obtain a master information block carried by the broadcast channel, and camp on a cell according to the synchronization signal;
• a decoding circuitry configured to decode the master information block carried by the broadcast channel to determine sub-band configuration of at least one non-basic sub-band, wherein the sub-band configuration comprises a frequency position;
• and
• an accessing circuitry configured to access the at least one non-basic sub-band based on the sub-band configuration of the at least one non-basic sub-band, when data interaction through the at least one non-basic sub-band is required,
• wherein the decoding circuitry comprises:
• a broadcast channel decoding sub-circuitry configured to decode the master information block carried by the broadcast channel to obtain configuration of a common control channel, wherein the configuration of the common control channel comprises a time-frequency resource position of the common control channel;
• a common control channel decoding sub-circuitry configured to decode the common control channel based on the configuration of the common control channel to determine a system information block carried by the common control channel;
• and
• a sub-band configuration determining sub-circuitry configured to decode the system information block carried by the common control channel to determine the sub-band configuration of the at least one non-basic sub-band.