METHOD FOR HARQ AND LINK ADAPTATION OF DEVICE TO DEVICE LINK IN DIRECT COMMUNICATION BETWEEN USER EQUIPMENTS AND RELAYING BY USER EQUIPMENT
First Claim
1. A method of processing hybrid automatic repeat request (HARQ) and adaptive transmission of a device-to-device (D2D) link when D2D link communication is performed in a time-division duplex (TDD) cellular communication system or a frequency-division duplex (FDD) cellular communication system using one of an uplink band and a downlink band, wherein an operation method of user equipment (UE) comprises:
- (a) receiving an initial transmission mode (TM) and transmission power for the D2D link from a base station, and performing data transmission through the D2D link;
(b) determining, at the UE, a TM and transmission power of a succeeding subframe, or receiving a TM control value and a transmission power control value from counterpart UE of the D2D link and determining the TM and the transmission power of the succeeding subframe; and
(c) performing the data transmission to the counterpart UE using the determined TM and transmission power,wherein (b) and (c) are repeated.
1 Assignment
0 Petitions
Accused Products
Abstract
Provided is a method of processing hybrid automatic repeat request (HARQ) and adaptive transmission of a device-to-device (D2D) link. In the method, an operation method of user equipment (UE) includes (a) receiving an initial transmission mode (TM) and transmission power for the D2D link from a base station, and performing data transmission through the D2D link, (b) determining, at the UE, a TM and transmission power of a succeeding subframe, or receiving a TM control value and a transmission power control value from counterpart UE of the D2D link and determining the TM and the transmission power of the succeeding subframe, and (c) performing the data transmission to the counterpart UE using the determined TM and transmission power. Here, (b) and (c) are repeated.
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Citations
17 Claims
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1. A method of processing hybrid automatic repeat request (HARQ) and adaptive transmission of a device-to-device (D2D) link when D2D link communication is performed in a time-division duplex (TDD) cellular communication system or a frequency-division duplex (FDD) cellular communication system using one of an uplink band and a downlink band, wherein an operation method of user equipment (UE) comprises:
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(a) receiving an initial transmission mode (TM) and transmission power for the D2D link from a base station, and performing data transmission through the D2D link; (b) determining, at the UE, a TM and transmission power of a succeeding subframe, or receiving a TM control value and a transmission power control value from counterpart UE of the D2D link and determining the TM and the transmission power of the succeeding subframe; and (c) performing the data transmission to the counterpart UE using the determined TM and transmission power, wherein (b) and (c) are repeated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of processing hybrid automatic repeat request (HARQ) and adaptive transmission of a device-to-device (D2D) link when D2D link communication is performed using both an uplink band and a downlink band in a frequency-division duplex (FDD) cellular communication system, wherein an operation method of user equipment (UE) comprises:
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(a) receiving an initial transmission mode (TM) and transmission power for the D2D link from a base station, and performing data transmission through the D2D link; (b) determining, at the UE, a TM and transmission power of a succeeding subframe, or receiving a TM control value and a transmission power control value from counterpart UE of the D2D link and determining the TM and the transmission power of the succeeding subframe; (c) receiving, at the UE, channel state information (CSI) from the counterpart UE, and determining a modulation and coding scheme (MCS) level of the succeeding subframe on the basis of the received CSI; and (d) modulating and coding data according to the determined MCS level, and transmitting the modulated and coded data to the counterpart UE using the determined TM and transmission power, wherein (b), (c) and (d) are repeated. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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Specification