Transmitting/receiving apparatus and transmitting/receiving method
First Claim
1. A base station apparatus comprising:
- an acquisition section that acquires from a communication terminal apparatus, frequency band information indicating a frequency band having a propagation path state that is equal to or better than a predetermined level among a plurality of frequency bands, into which a frequency band used for a transmission multicarrier signal is divided and which are known to both the base station apparatus and the communication terminal apparatus; and
a transmitting section that transmits a signal to the communication terminal apparatus via the frequency band indicated by the frequency band information, wherein;
the transmitting section sets a repetition number of the frequency band information in accordance with a number of accommodated communication terminal apparatuses and instructs each of a plurality of communication terminal apparatuses on the repetition number.
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Accused Products
Abstract
A transmission/reception apparatus capable of preventing degradation in system capacity, improving system throughput, and minimizing power consumption of an apparatus is disclosed. In this apparatus, a propagation path determining section (131) determines a propagation path state in all the regions in the used frequency band of a received multicarrier signal based on propagation path estimation information such as a channel estimation value and the like calculated in a propagation path estimating section (126), and specifies a frequency region having a good propagation path state from the used frequency band of OFDM. More specifically, the used frequency band is divided into a plurality of frequency bands (subbands), each comprised of smaller predetermined bandwidth, and by selecting a subband having a good propagation path state in the propagation path determining section (131), a frequency region having the good propagation path state is specified. A transmitting section (110) reports the subband information to a base station.
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Citations
8 Claims
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1. A base station apparatus comprising:
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an acquisition section that acquires from a communication terminal apparatus, frequency band information indicating a frequency band having a propagation path state that is equal to or better than a predetermined level among a plurality of frequency bands, into which a frequency band used for a transmission multicarrier signal is divided and which are known to both the base station apparatus and the communication terminal apparatus; and a transmitting section that transmits a signal to the communication terminal apparatus via the frequency band indicated by the frequency band information, wherein; the transmitting section sets a repetition number of the frequency band information in accordance with a number of accommodated communication terminal apparatuses and instructs each of a plurality of communication terminal apparatuses on the repetition number. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A transmission method in a base station apparatus, the method comprising:
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from a communication terminal apparatus, acquiring frequency band information indicating a frequency band having a propagation path state equal to or better than a predetermined level among a plurality of frequency bands, into which a frequency band used for a transmission multicarrier signal is divided and which are known to both the base station apparatus and the communication terminal apparatus; and transmitting a signal to the communication terminal apparatus via the frequency band indicated by the frequency band information, wherein; the transmitting comprises setting a repetition number of the frequency band information in accordance with the number of accommodated communication terminal apparatuses and instructing each of a plurality of communication terminal apparatuses on the repetition number.
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Specification