| 摘要 |
A handoff method of a CDMA mobile communication system in which one or a plurality of tiers of wireless frequencies are assigned on an individual wireless zone basis, locational information of a mobile device is obtained, and when, according to the foregoing locational information, the mobile device is present in the vicinity of a frequency-tier boundary where different frequency tiers are assigned to a cell conducting a communication and an adjacent cell, an inter-frequency handoff is performed to a tier of a common frequency prepared commonly in both the foregoing cell conducting the communication and the foregoing adjacent cell.
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