Radio base station and program for radio base station

A communication method for use by a wireless base station that communicates with a plurality of mobile stations by using a same unique word and a same time slot, comprising:

• an identifying step for identifying transmission timing of signals having the same unique word, each transmitted to a different one of mobile stations within a time slot in a TDMA/TDD frame;
• a judging step for judging whether a difference between transmission timing identified for a respective one of a first mobile station and a second mobile station that are assigned to a same time slot is greater than a predetermined timing difference threshold;
• and
• a communication step for establishing communication with the first and second mobile stations within the same time slot using a space-division multiplexing, when the difference between transmission timing is judged to be greater than the timing difference threshold.

A computer-readable recording medium, stored with, embodied with, or encoded with computer executable instructions operable to cause predetermined communication control to be performed when said instructions are executed by a computer that is included in a wireless base station that communicates with a plurality of mobile stations by using a same unique word and a same time slot, the communication control including:

• an identifying step for identifying transmission timing of signals having the same unique word each transmitted to a different one of mobile stations within a time slot in a TDMA/TDD frame;
• a judging step for judging whether a difference between transmission timing identified for a respective one of a first mobile station and a second mobile station that are assigned to a same time slot is greater than a predetermined timing difference threshold;
• and
• a communication step for establishing communication with the first and second mobile stations within the same time slot using space-division multiplexing, when the difference between transmission timing is judged to be greater than the timing difference threshold.