| 摘要 |
PROBLEM TO BE SOLVED: To improve the frequency utilizing efficiency of operating frequency bands by dividing each of two frequency bands into carrier frequencies whose number is the same as a prescribed number of radio cells, assigning two carrier frequencies to each radio cell and operating a time division multiple access/time division duplex system with the respective frequencies. SOLUTION: Frequency bands are divided into two frequency bands being upper and lower frequencies with an equal band width, and let number of repetition of cell arrangement be, e.g. 7, then the upper/lower frequency bands are divided respectively into 7 carrier frequencies f1-f7 and f1'-f7' and two optional carrier frequencies are assigned as operating frequencies of each cell among the carrier frequencies in total of 14. One system of a transmitter-receiver is enough by allocating slots of each carrier so that the slot assigned to the two carriers is not in duplicate at the same time and the configuration of the slave set is simplified.
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