| 摘要 |
Multiple diversity used in a fading or shadowed error prone, framed, random access channel enhances the probability of successful transmission and reduces delays. This is important, for example, in mobile telephone service, in which traffic channels are only assigned on a speech spurt basis. Selected control messages (such as reverse allocation requests and deallocation requests) are transmitted with multiple diversity. More particularly, an identical control message is transmitted at multiple instants in time (such as three), each transmission occurring on a different carrier frequency, and each transmission occurring at a randomly selected power level.
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