| 摘要 |
Cellular radiotelephone systems and methods communicate with cellular radiotelephones via multiple base stations. Radiotelephone traffic channels are used by the base stations for radiotelephone communications with the telephones. A common control channel is transmitted by the base stations, to control radiotelephone communications with the radiotelephones over the radiotelephone traffic channels. The common control channel is transmitted b y a first one of the base stations over a first radio frequency and is transmitted by a second one of the base stations over a second radio frequen cy that is different from the first radio frequency. By providing a common control channel, excess control channel capacity can be reduced, thereby conserving control channel radio spectrum. Moreover, by transmitting the common control channel using multiple radio frequencies, the radio frequenci es can be selected to reduce and preferably eliminate interference.
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