Base station, terminal, and wireless communication system
First Claim
1. A base station that performs wireless communication with a terminal by using a dedicated band dedicated to a wireless communication system including the base station and the terminal and a shared band shared with other systems, the base station comprising:
- a transmitter configured to transmit, to the terminal using the dedicated band, a control signal including first information and second information, the first information indicating an uplink resource in the shared band to be used for data transmission by the terminal, the second information indicating a period to wait for a permission signal indicating the data transmission can be performed using the uplink resource; and
a controller configured to determine whether the shared band is idle or busy, whereinthe transmitter transmits, to the terminal via physical downlink channel, the permission signal transmitted using the shared band with different timing from the control signal, the permission signal for permitting transmission in the shared band when the controller determines that the shared band is idle, andthe control signal includes an offset indicating a time from receiving the permission signal to a start of transmission of data from the terminal to the base station with reference to the permission signal transmitted from the transmitter.
1 Assignment
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Accused Products
Abstract
According to one embodiment, a base station includes a licensed band transmitting unit, a determining unit, and an unlicensed band transmitting unit. The licensed band transmitting unit transmits, to a terminal, a control signal for specifying a resource in a shared band to be used for data transmission by the terminal. The determining unit determines whether the resource in the shared band is idle or busy. The unlicensed band transmitting unit transmits a permission signal for permitting transmission in the shared band when the determining unit determines that the resource in the shared band is idle. The control signal or the permission signal includes an offset indicating a time from the permission signal to a start of transmission of data from the terminal to the base station with reference to the permission signal transmitted from the unlicensed band transmitting unit.
23 Citations
10 Claims
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1. A base station that performs wireless communication with a terminal by using a dedicated band dedicated to a wireless communication system including the base station and the terminal and a shared band shared with other systems, the base station comprising:
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a transmitter configured to transmit, to the terminal using the dedicated band, a control signal including first information and second information, the first information indicating an uplink resource in the shared band to be used for data transmission by the terminal, the second information indicating a period to wait for a permission signal indicating the data transmission can be performed using the uplink resource; and a controller configured to determine whether the shared band is idle or busy, wherein the transmitter transmits, to the terminal via physical downlink channel, the permission signal transmitted using the shared band with different timing from the control signal, the permission signal for permitting transmission in the shared band when the controller determines that the shared band is idle, and the control signal includes an offset indicating a time from receiving the permission signal to a start of transmission of data from the terminal to the base station with reference to the permission signal transmitted from the transmitter. - View Dependent Claims (2, 3, 4)
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5. A terminal that performs wireless communication with a base station by using a dedicated band dedicated to a wireless communication system including the base station and the terminal and a shared band shared with other systems, the terminal comprising:
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a receiver configured to receive using the dedicated band, a control signal including first information and second information, the first information indicating an uplink resource in the shared band to be used for data transmission by the terminal, the second information indicating a period to wait for a permission signal indicating the data transmission can be performed using the uplink resource, and to receive the permission signal for permitting transmission in the shared band transmitted via physical downlink channel from the base station with different timing from the control signal; and a transmitter configured to transmit to the base station using the uplink resource in the shared band specified by the control signal, wherein the control signal includes an offset indicating a time from receiving the permission signal to a start of transmission of data to the base station with reference to the permission signal transmitted from the base station, and the transmitter transmits data to the base station by using the uplink resource in the shared band specified by the control signal after a lapse of the time indicated by the offset since reception of the permission signal by the receiver. - View Dependent Claims (6, 7, 8, 9)
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10. A wireless communication system comprising:
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a base station; and a terminal, wherein the base station and the terminal perform wireless communication with each other by using a dedicated band dedicated to the wireless communication system and a shared band shared with other systems, the base station includes; a first transmitter configured to transmit, to the terminal using the dedicated band, a control signal including first information and second information, the first information indicating an uplink resource in the shared band to be used for data transmission by the terminal, the second information indicating a period to wait for a permission signal indicating the data transmission can be performed using the uplink resource; and a controller configured to determine whether the shared band is idle or busy, wherein the first transmitter transmits, to the terminal via physical downlinkchannel, the permission signal transmitted using the shared band with different timing from the control signal, the permission signal for permitting transmission in the shared band when the controller determines that the shared band is idle, and the control signal includes an offset indicating a time from receiving the permission signal to a start of transmission of data from the terminal to the base station with reference to the permission signal transmitted from the first transmitter, the terminal includes; a receiver configured to receive using the dedicated band, the control signal and receive using the shared band, the permission signal; a second transmitter configured to transmit data to the base station using the uplink resource in the shared band specified by the control signal after a lapse of the time indicated by the offset since reception of the permission signal by the receiver.
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Specification