| CPC H04B 7/0602 (2013.01) [H04B 7/0404 (2013.01); H04B 7/0481 (2023.05)] | 20 Claims | 

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               1. A method, comprising: 
            determining a first full-power transmission codebook subset corresponding to a frequency band supported by a terminal device before antenna port switching of the terminal device; and 
                determining, according to a specified rule and a plurality of full-power transmission codebook subsets corresponding to a plurality of source frequency bands, a second full-power transmission codebook subset corresponding to a target frequency band after antenna port switching of the terminal device, 
                wherein the plurality of source frequency bands are frequency bands in which a plurality of target antenna ports are located before antenna port switching, the plurality of target antenna ports are antenna ports in the target frequency band after antenna port switching, and the specified rule indicates a correspondence between the first full-power transmission codebook subsets corresponding to the plurality of source frequency bands before antenna port switching and the second full-power transmission codebook subset corresponding to the target frequency band after antenna port switching. 
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