| CPC H04L 5/0098 (2013.01) [H04W 72/0453 (2013.01); H04W 72/23 (2023.01)] | 20 Claims | 

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               1. A method performed by a base station, the method comprising: 
            transmitting a candidate carrier configuration that indicates at least one of a frequency position, a frequency offset, an operation mode, narrowband reference signal (NRS) information, cell specific reference signal (CRS) information, a power offset, or an evolved universal mobile telecommunications system terrestrial radio access (EUTRA) system bandwidth of at least one candidate carrier; and 
                transmitting an indication of whether a candidate carrier, based on the candidate carrier configuration, can be used for data transmission. 
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