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This paper proposes intra-operator dynamic spectrum access, i.e., dynamic spectrum access by an operator's networks of its available spectrum bands, as a means to improve power efficiency. It is based around four areas of interest: dynamically moving users into particularly active bands from other bands to allow radio network equipment in those other bands to be switched off when possible, the dynamic sharing of spectrum in order to take advantage of better propagation bands and reduce necessary transmission power, the sharing of spectrum to allow channel bandwidths to be increased thus allowing transmission power to be significantly decreased, and the better hierarchical management of spectrum in cases where different types of cells coexist.
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