Device and method for time division duplex and frequency duplex carrier aggregation in wireless communication system
First Claim
Patent Images
1. A method for operating a terminal in a wireless communication system, the method comprising:
- receiving, from a base station, a first downlink signal through a first carrier using frequency division duplex (FDD) scheme and a second downlink signal through a second carrier using-time division duplex (TDD) scheme based on FDD-TDD carrier aggregation (CA); and
transmitting, to the base station, a first uplink signal corresponding to the first downlink signal and a second uplink signal corresponding to the second downlink signal,wherein the second uplink signal is transmitted through the first carrier using the FDD scheme, in a first case that the terminal is located out of an uplink coverage of the second carrier,wherein the second uplink signal is transmitted through the second carrier using the TDD scheme, in a second case that the terminal is located in the uplink coverage of the second carrier, andwherein, in the first case, resources used for downlink communication using the second carrier include a resource in a guard period of at least one special subframe, and the guard period is used for switching from a downlink operation to an uplink operation by another terminal which performs uplink communication through the second carrier.
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Abstract
An apparatus and a method for a carrier aggregation (CA) operation using a Frequency Division Duplex (FDD) carrier and a Time Division Duplex (TDD) carrier in a wireless communication system are provided. The method includes receiving downlink signals via downlink FDD TDD CA using a first carrier operated in an FDD mode and a second carrier operated in a TDD mode and transmitting, via the first carrier, uplink signals corresponding to the downlink signals received via the first and second carriers.
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Citations
17 Claims
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1. A method for operating a terminal in a wireless communication system, the method comprising:
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receiving, from a base station, a first downlink signal through a first carrier using frequency division duplex (FDD) scheme and a second downlink signal through a second carrier using-time division duplex (TDD) scheme based on FDD-TDD carrier aggregation (CA); and transmitting, to the base station, a first uplink signal corresponding to the first downlink signal and a second uplink signal corresponding to the second downlink signal, wherein the second uplink signal is transmitted through the first carrier using the FDD scheme, in a first case that the terminal is located out of an uplink coverage of the second carrier, wherein the second uplink signal is transmitted through the second carrier using the TDD scheme, in a second case that the terminal is located in the uplink coverage of the second carrier, and wherein, in the first case, resources used for downlink communication using the second carrier include a resource in a guard period of at least one special subframe, and the guard period is used for switching from a downlink operation to an uplink operation by another terminal which performs uplink communication through the second carrier. - View Dependent Claims (2, 3, 4, 5)
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6. A method for operating a base station in a wireless communication system, the method comprising:
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transmitting, to a terminal, a first downlink signal through a first carrier using frequency division duplex (FDD)-scheme and a second downlink signal through a second carrier using time division duplex (TDD) scheme based on FDD-TDD carrier aggregation (CA); and receiving, from the terminal, a first uplink signal corresponding to the first downlink signal and a second uplink signal corresponding to the second downlink signal, wherein the second uplink signal is received through the first carrier using the FDD scheme, in a first case that the terminal is located out of an uplink coverage of the second carrier, wherein the second uplink signal is received through the second carrier using the TDD scheme, in a second case that the terminal is located in the uplink coverage of the second carrier, and wherein, in the first case, resources used for downlink communication using the second carrier include a resource in a guard period of at least one special subframe, and the guard period is used for switching from a downlink operation to an uplink operation by another terminal which performs uplink communication through the second carrier. - View Dependent Claims (7, 8, 9)
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10. An apparatus for a terminal in a wireless communication system, the apparatus comprising:
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a transceiver; and at least one processor operatively coupled with the transceiver, wherein the at least one processor is configured to control to; receive, from a base station, a first downlink signal through a first carrier using frequency division duplex (FDD) scheme and a second downlink signal through a second carrier using-time division duplex (TDD) scheme based on FDD-TDD carrier aggregation (CA), and transmit, to the base station, a first uplink signal corresponding to the first downlink signal and a second uplink signal corresponding to the second downlink signal, wherein the second uplink signal is transmitted through the first carrier using the FDD scheme, in a first case that the terminal is located out of an uplink coverage of the second carrier, wherein the second uplink signal is transmitted through the second carrier using the TDD scheme, in a second case that the terminal is located in the uplink coverage of the second carrier, and wherein, in the first case, resources used for downlink communication using the second carrier include a resource in a guard period of at least one special subframe, and the guard period is used for switching from a downlink operation to an uplink operation by another terminal which performs uplink communication through the second carrier. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification