Spectrum efficiency is improved by assigning only a small number of subcarriers to a paging channel as compared with a traffic channel to which a large number of subcarriers are assigned. Also, by grouping users and assigning the paging channel of each group to a corresponding subcarrier, the received...http://www.google.se/patents/US20020159426?utm_source=gb-gplus-sharePatent US20020159426 - Base station apparatus and radio communication method
