US Patent No. 9,686,778

FEEDBACK INFORMATION TRANSMITTING METHOD AND DEVICE


Patent No. 9,686,778
Issue Date June 20, 2017
Title Feedback Information Transmitting Method And Device
Inventorship Xuejuan Gao, Beijing (CN)
Yanan Lin, Beijing (CN)
Zukang Shen, Beijing (CN)
Assignee CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY, Beijing (CN)

Claim of US Patent No. 9,686,778

1. A method for transmitting feedback information, the method comprising:
receiving, by a terminal, data over a first carrier, and receiving data over a second carrier, wherein the data over the first
carrier are scheduled by a first base station, and the data over the second carrier are scheduled by a second base station;

generating, by the terminal, first uplink control information for the first carrier and/or generating, by the terminal, second
uplink control information for the second carrier; and

transmitting, by the terminal, uplink control information generated by the terminal, comprising at least one of the first
uplink control information and the second uplink control information, through a Physical Uplink Control Channel, PUCCH, and/or
a Physical Uplink Shared Channel, PUSCH, over one uplink carrier;

wherein transmitting, by the terminal, the uplink control information through the PUCCH and/or the PUSCH over the one uplink
carrier comprises:

in a first approach, transmitting, by the terminal, the first uplink control information and the second uplink control information
concurrently through a same PUCCH or PUSCH over the one uplink carrier; or

in a second approach, transmitting, by the terminal, the first uplink control information through a first PUCCH using a first
PUCCH resource over the one uplink carrier and/or transmitting the second uplink control information through a second PUCCH
using a second PUCCH resource over the one uplink carrier; or

in a third approach, if there is a first PUSCH of the terminal, scheduled by the first base station over the one uplink carrier,
then transmitting, by the terminal, the first uplink control information through the first PUSCH over the one uplink carrier;
otherwise, transmitting, by the terminal, the first uplink control information through a first PUCCH using a first PUCCH resource
over the one uplink carrier; and/or if there is a second PUSCH of the terminal, scheduled by the second base station over
the one uplink carrier, then transmitting, by the terminal, the second uplink control information through the second PUSCH
over the one uplink carrier; otherwise, transmitting, by the terminal, the second uplink control information through a second
PUCCH using a second PUCCH resource over the one uplink carrier;

wherein the first PUCCH resource is different from the second PUCCH resource;
wherein for the first approach, if the uplink control information comprises Acknowledgement, ACK, /Negative Acknowledgement,
NACK, feedback information, then:

generating, by the terminal, the first uplink control information for the first carrier comprises: generating, by the terminal,
ACK/NACK for downlink sub-frames in which data are received over the first carrier, and generating NACK/Discontinuous Transmission,
DTX, for downlink sub-frames in which no data are received over the first carrier, as ACK/NACK feedback information corresponding
to the first carrier, wherein if there is no data received over the first carrier, then the terminal will take NACK/DTX as
ACK/NACK feedback information corresponding to the first carrier; and

generating, by the terminal, the second uplink control information for the second carrier comprises: generating, by the terminal,
ACK/NACK for downlink sub-frames in which data are received over the second carrier, and generating NACK/DTX for downlink
sub-frames in which no data are received over the second carrier, as ACK/NACK feedback information corresponding to the second
carrier, wherein if there is no data received over the second carrier, then the terminal will take NACK/DTX as ACK/NACK feedback
information corresponding to the second carrier;

wherein for the second approach and the third approach, if the uplink control information comprises ACK/NACK feedback information,
then:

generating, by the terminal, the first uplink control information for the first carrier comprises: generating, by the terminal,
ACK/NACK for downlink sub-frames in which data are received over the first carrier, and generating NACK/DTX, for downlink
sub-frames in which no data are received over the first carrier, as ACK/NACK feedback information corresponding to the first
carrier, wherein if there is no data received over the first carrier, then the terminal will not generate ACK/NACK feedback
information corresponding to the first carrier; and

generating, by the terminal, the second uplink control information for the second carrier comprises: generating, by the terminal,
ACK/NACK for downlink sub-frames in which data are received over the second carrier, and generating NACK/DTX for downlink
sub-frames in which no data are received over the second carrier, as ACK/NACK feedback information corresponding to the second
carrier, wherein if there is no data received over the second carrier, then the terminal will not generate ACK/NACK feedback
information corresponding to the second carrier.