USER TERMINAL, RADIO BASE STATION APPARATUS, RADIO COMMUNICATION SYSTEM AND RADIO COMMUNICATION METHOD
First Claim
1. A radio communication system comprising:
- a radio base station apparatus comprising;
an allocation section that allocates downlink control information in a first control region from a top of a radio frame to a predetermined OFDM symbol and in a second control region that is frequency-divided with a data region in a region that is time-divided with the first control region, and also allocates decoding control information that indicates a user terminal to perform a decoding process for the second control region, in the first control region; and
a transmission section that transmits the downlink control information and the decoding control information; and
a user terminal comprising;
a receiving section that receives the downlink control information and the decoding control information from the radio base station apparatus; and
a decoding section that controls a decoding process for the second control region based on the decoding control information received.
1 Assignment
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Accused Products
Abstract
The present invention is designed to minimize the increase of user terminal power consumption even when downlink control channels are extended. A radio base station apparatus having: an allocation section that allocates downlink control information in a first control region from a top of a radio frame to a predetermined OFDM symbol and in a second control region that is frequency-divided with a data region in a region that is time-divided with the first control region, and also allocates decoding control information that indicates a user terminal to perform a decoding process for the second control region, in the first control region; and a transmission section that transmits the downlink control information and the decoding control information; and a user terminal having: a receiving section that receives the downlink control information and the decoding control information from the radio base station apparatus; and a decoding section that controls the decoding process for the second control region based on the decoding control information received, are provided.
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Citations
16 Claims
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1. A radio communication system comprising:
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a radio base station apparatus comprising; an allocation section that allocates downlink control information in a first control region from a top of a radio frame to a predetermined OFDM symbol and in a second control region that is frequency-divided with a data region in a region that is time-divided with the first control region, and also allocates decoding control information that indicates a user terminal to perform a decoding process for the second control region, in the first control region; and a transmission section that transmits the downlink control information and the decoding control information; and a user terminal comprising; a receiving section that receives the downlink control information and the decoding control information from the radio base station apparatus; and a decoding section that controls a decoding process for the second control region based on the decoding control information received. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A radio base station apparatus comprising:
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an allocation section that allocates downlink control information in a first control region from a top of a radio frame to a predetermined OFDM symbol and in a second control region that is frequency-divided with a data region in a region that is time-divided with the first control region, and also allocates decoding control information that indicates a user terminal to perform a decoding process for the second control region, in the first control region; and a transmission section that transmits the downlink control information and the decoding control information to a user terminal.
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9. A user terminal comprising:
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a receiving section that receives downlink control information that is allocated in a first control region from a top of a radio frame to a predetermined OFDM symbol and in a second control region that is frequency-divided with a data region in a region that is time-divided with the first control region, and also receives decoding control information that is allocated in the first control region and that indicates a user terminal to perform a decoding process for the second control region; and a decoding section that control the decoding process for the second control region based on the decoding control information.
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10. A radio communication method of transmitting downlink control information generated in a radio base station apparatus to a user terminal and controlling demodulation of the downlink control information received in the user terminal, the method comprising the steps in which:
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the radio base station apparatus; allocates downlink control information in a first control region from a top of a radio frame to a predetermined OFDM symbol and in a second control region that is frequency-divided with a data region in a region that is time-divided with the first control region, and also allocates decoding control information that indicates a user terminal to perform a decoding process for the second control region, in the first control region; and transmits the downlink control information and the decoding control information; and the user terminal; receives the downlink control information and the decoding control information from the radio base station apparatus; and controls the decoding process for the second control region based on the decoding control information received.
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11. A radio communication system comprising:
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a radio base station apparatus comprising; an allocation section that allocates, over continuous radio frames, downlink control information in a first control region from a top of each radio frame to a predetermined OFDM symbol, and also allocates, in a specific radio frame, downlink control information in a second control region that is frequency-divided with a data region in a region that is time-divided with the first control region; and a transmission section that transmits the downlink control information allocated in the first control region and the second control region; and a user terminal comprising; a receiving section that receives the downlink control information from the radio base station apparatus; and a decoding section that decodes the downlink control information of the first control region and the second control region received. - View Dependent Claims (12, 13)
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14. A radio base station apparatus comprising:
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an allocation section that allocates downlink control information in a first control region from a top of each radio frame to a predetermined OFDM symbol, over continuous radio frames, and also allocates, in a specific radio frame, downlink control information in a second control region that is frequency-divided with a data region in a region that is time-divided with the first control region; and a transmission section that transmits the downlink control information allocated in the first control region and the second control region to a user terminal.
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15. A user terminal comprising:
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a receiving section that receives downlink control information that is allocated, in a first control region from a top of each radio frame to a predetermined OFDM symbol, over continuous radio frames, and downlink control information that is allocated in a second control region that is frequency-divided with a data region in a region that is time-divided with the first control region, in a specific radio frame; and a decoding section that decodes downlink control information of the first control region and the second control region received.
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16. A radio communication method of transmitting downlink control information generated in a radio base station apparatus to a user terminal and controlling demodulation of the downlink control information received in the user terminal, the method comprising the steps in which:
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the radio base station apparatus; allocates downlink control information in a first control region from a top of each radio frame to a predetermined OFDM symbol, over continuous radio frames, and also allocates, in a specific radio frame, downlink control information in a second control region that is frequency-divided with a data region in a region that is time-divided with the first control region; and transmits the downlink control information allocated in the first control region and the second control region; and the user terminal; receives the downlink control information from the radio base station apparatus; and decodes the downlink control information of the first control region and the second control region received.
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Specification