METHOD FOR PERFORMING HYBRID AUTOMATIC REPEAT REQUEST, AND BASE STATION AND MOBILE DEVICE USING THE SAME
First Claim
1. A method for performing hybrid automatic repeat request (HARQ), adapted to a base station in a wireless communication system, the method comprising:
- allocating a wireless resource by using the base station, and determining whether to perform a device-to-device (D2D) communication;
when the D2D communication is performed, transmitting a first resource allocation message to a first mobile device and a second mobile device by using the base station, so that the first mobile device, which works as a transmitter, transmits a data packet to the second mobile device, which works as a receiver, according to the first resource allocation message;
receiving a HARQ feedback packet from the second mobile device by using the base station to determine whether the data packet is successfully transmitted; and
when the HARQ feedback packet is a negative acknowledgement (NACK), retaining the wireless resource allocated in the first resource allocation message or transmitting a second resource allocation message to the first mobile device and the second mobile device by using the base station.
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Accused Products
Abstract
A method for performing hybrid automatic repeat request (HARQ), a base station (BS), and a mobile device are provided. In the method, a wireless resource is allocated by the BS, and whether to perform a device-to-device (D2D) communication is determined. When the D2D communication is performed, a first resource allocation message is transmitted by the BS to a first mobile device and a second mobile device, and the first mobile device, working as a transmitter, transmits a data packet to the second mobile device, working as a receiver, according to the first resource allocation message. A HARQ feedback packet is received by the BS from the second mobile device to determine whether the data packet is successfully transmitted. When the HARQ feedback packet is a negative acknowledgement (NACK), the BS retains the original wireless resource or transmits a second resource allocation message to the first and the second mobile devices.
36 Citations
41 Claims
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1. A method for performing hybrid automatic repeat request (HARQ), adapted to a base station in a wireless communication system, the method comprising:
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allocating a wireless resource by using the base station, and determining whether to perform a device-to-device (D2D) communication; when the D2D communication is performed, transmitting a first resource allocation message to a first mobile device and a second mobile device by using the base station, so that the first mobile device, which works as a transmitter, transmits a data packet to the second mobile device, which works as a receiver, according to the first resource allocation message; receiving a HARQ feedback packet from the second mobile device by using the base station to determine whether the data packet is successfully transmitted; and when the HARQ feedback packet is a negative acknowledgement (NACK), retaining the wireless resource allocated in the first resource allocation message or transmitting a second resource allocation message to the first mobile device and the second mobile device by using the base station. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A base station, comprising:
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a transceiver, configured to transmit and receive wireless signals; and a processor, coupled to the transceiver, and configured to execute following operations; allocating a wireless resource used by at least one mobile device; when a device-to-device (D2D) communication is performed, transmitting a first resource allocation message to a first mobile device and a second mobile device, so that the first mobile device, which works as a transmitter, transmits a data packet to the second mobile device, which works as a receiver, according to the first resource allocation message; receiving a hybrid automatic repeat request (HARQ) feedback packet from the second mobile device to determine whether the data packet is successfully transmitted; and when the HARQ feedback packet is a negative acknowledgement (NACK), retaining the wireless resource allocated in the first resource allocation message or transmitting a second resource allocation message to the first mobile device and the second mobile device. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method for performing hybrid automatic repeat request (HARQ), adapted to a first mobile device and a second mobile device that perform a device-to-device (D2D) communication in a wireless communication system, the method comprising:
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monitoring a first resource allocation message from a base station by using the first mobile device and the second mobile device to determine whether to perform the D2D communication; when the D2D communication is performed, transmitting a data packet by using the first mobile device, which is instructed to work as a transmitter, to the second mobile device, which is instructed to work as a receiver, according to a wireless resource allocated in the first resource allocation message; and transmitting a HARQ feedback packet to the base station by using the second mobile device to respond that whether the data packet is successfully received. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29)
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30. A mobile device, comprising:
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a transceiver, configured to transmit and receive wireless signals; and a processor, coupled to the transceiver, and configured to execute following operations; receiving a first resource allocation message from a base station to determine whether to perform a device-to-device (D2D) communication; when the first resource allocation message instructs to perform the D2D communication as a transmitter, transmitting a data packet to another mobile device according to a wireless resource allocated in the first resource allocation message; and when the first resource allocation message instructs to perform the D2D communication as a receiver, receiving the data packet from the other mobile device according to the wireless resource allocated in the first resource allocation message, and transmitting a hybrid automatic repeat request (HARQ) feedback packet to the base station to respond that whether the data packet is successfully received. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41)
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Specification