公开(公告)号：US20190053284A1

公开(公告)日：2019-02-14

申请号：US16075572

申请日：2017-01-03

Applicant: China Academy of Telecommunications Technology

Inventor： Jiaqing WANG ,  Xueming PAN ,  Qianqian SI

IPC: H04W74/08 ,  H04W72/04 ,  H04W16/14

Abstract: Disclosed in the present application are a method and a device for transmitting PRACH signals in an unauthorized spectrum, used for enhancing channel access for a PRACH signal. The method comprises: before transmitting each candidate resource as configured in resources, a terminal performs LBT detection according to configuration information of a transmission resource for transmitting PRACH signals until a current channel is detected to be idle; and after detecting that the current channel is idle, the terminal transmits a PRACH signal on the corresponding candidate resource. In the present application, a plurality of candidate resources are configured in a transmission resource for transmitting PRACH signals, such that the terminal may transmit the PRACH signals on the corresponding candidate resource when it is detected that the current channel is idle before any candidate resource, thereby improving transmission probability for PRACH signals and enhancing channel access for PRACH signals.

公开(公告)号：US20180376504A1

公开(公告)日：2018-12-27

申请号：US16075143

申请日：2017-01-18

Applicant: China Academy of Telecommunications Technology

Inventor： Qianqian SI ,  Xuejuan GAO ,  Xueming PAN ,  Jiaqing WANG

IPC: H04W74/08 ,  H04W76/28 ,  H04W72/04

Abstract: A method and device for transmitting uplink control information is described. The method includes according to the size and position of a feedback window, determining uplink control information; according to a transmission moment of the uplink control information, performing listen-before-talk detection to determine an actual uplink transmission moment; and transmitting the determined uplink control information at an actual uplink transmission moment. In the embodiments of the present disclosure, under the situation where no channel is occupied at a set uplink control information transmission moment, one or more times of listen-before-talk detection are continued, and the determined uplink control information is transmitted on an actual uplink transmission moment, thereby avoiding the situation that uplink control information may not be correctly transmitted in time due to not occupying a channel, and further improving the system performance.

公开(公告)号：US20180255534A1

公开(公告)日：2018-09-06

申请号：US15759213

申请日：2016-08-04

Applicant: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY

Inventor： Jiaqing WANG ,  Xueming PAN ,  Weijie XU ,  Qianqian SI

IPC: H04W72/04

CPC classification number: H04W72/042 ,  H04L5/0053 ,  H04W16/14 ,  H04W72/044 ,  H04W72/1289 ,  H04W74/0808

Abstract: Disclosed are a physical downlink control channel transmission method and apparatus, which are used for achieving, in the case where an initial signal or signalling which indicates an initial position of a physical downlink shared channel is not transmitted, a method in which a physical downlink control channel is used for transmitting and indicating an initial position of a physical downlink shared channel. The method comprises: a terminal determining, according to each candidate time position in a set of candidate time positions and a set of candidate physical downlink control channel/enhanced physical downlink control channel resource positions corresponding to the candidate time position respectively, a physical downlink control channel/enhanced physical downlink control channel bearing downlink control information in an unauthorized frequency band wireless frame; and the terminal receiving the downlink control information by means of the determined physical downlink control channel/enhanced physical downlink control channel.