| 摘要 |
A method of allocating time slots in a time division multiple access cellula r telephone system increases the traffic capacity of a base station's RF channel. A method is provided for operating in half rate mode while maintaining adequate signal quality over the RF channel communications link between a base station and a mobile station. Because the signal quality of t he communications link depends on, among other things, the interleaving depth between sequential received time slots, increasing interleaving depth betwee n sequential time slots within the same frame format will improve singal quality. Increasing the interleaving depth between sequential time slots may be accomplished by allocating more than one time slot within a given frame t o a particular mobile station. While the conventional method of frame division does not provide for this while operating the channel in half rate mode, the present invention addresses this need by permitting a channel to operate in half rate mode, but dividing each frame into more than the cnventional six slots. In half rate mode, each mobile station is allocated at least two of t he twelve slots. In rate mode, each mobile station is allocated at least four o f the twelve slots. For mobile stations esperiencing little or no signal deterioration from other sources, a channel can be operated in half rate mod e with little or no adverse effect to the signal quality. For mobile stations that are experiencing signal deterioration, the same channel can provide ful l rate mode support.
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