Radio base station and program for radio base station
First Claim
1. A wireless base station for communicating with a plurality of mobile stations by using a same unique word and a same time slot, comprising:
- identifying means for identifying transmission timing of signals with the same unique word, each transmitted to a different one of mobile stations within a time slot in a TDMA/TDD frame;
judging means 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
communication means 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.
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Accused Products
Abstract
A wireless base station comprises a response vector calculation unit (561), an RSSI measuring unit (562), an MSE calculation unit (563), an FD calculation unit (564) and the like, and those units obtain an index showing communication quality of at least one of two mobile stations that are intended to be space-division multiplexed. According to the index, a control unit (80) judges the suitability of the two mobile stations for space-division multiplexing and performs space-division multiple access communication when judging suitable. The effect achieved with this construction is that the wireless base station maintains quality of communication between the wireless base station and mobile stations at a certain satisfactory level when performing space-division multiple access communication.
20 Citations
10 Claims
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1. A wireless base station for communicating with a plurality of mobile stations by using a same unique word and a same time slot, comprising:
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identifying means for identifying transmission timing of signals with the same unique word, each transmitted to a different one of mobile stations within a time slot in a TDMA/TDD frame; judging means 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 communication means 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. 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:
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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.
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10. 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:
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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.
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Specification