Importance

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Abstract

A method for operating a base station to solve a speech disable state based on the inter-speech sphere movement of a mobile station in enlarging a speech radius limited in timing in a CDMA mobile communication system. In a base station where a speech radius wider than that limited by a modem ASIC is partitioned by a predetermined radius unit into a plurality of speech spheres for the enlargement of the limited speech radius and channel elements are assigned to the partitioned speech spheres for transmission/reception of channels, a handoff operation is performed from an arbitrary channel element in the base station to a channel element assigned to a different speech sphere when a mobile station moves beyond an initial speech sphere during conversation with the arbitrary channel element. At this time, a reverse traffic channel is demodulated and remains at a standby state. Therefore, if the mobile station moves beyond the initial speech sphere above the predetermined radius unit, the demodulated reverse traffic channel is selected and utilized by the channel element assigned to the different speech sphere. This has the effect of preventing a speech disable state based on the inter-speech sphere movement of the mobile station.

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First Claim