US Patent No. 11,032,839

UPLINK SIGNAL TRANSMISSION METHOD, APPARATUS, SYSTEM, COMMUNICATIONS DEVICE, AND STORAGE MEDIUM


Patent No. 11,032,839
Issue Date June 08, 2021
Title Uplink Signal Transmission Method, Apparatus, System, Communications Device, And Storage Medium
Inventorship Ting Ke, Beijing (CN)
Xueying Hou, Beijing (CN)
Hui Ma, Beijing (CN)
Jianjun Liu, Beijing (CN)
Assignee China Mobile Communication Co., Ltd Research Institute, Beijing (CN) China...

Claim of US Patent No. 11,032,839

1. A method for transmitting an uplink (UL) signal, applied into a terminal side and comprising:determining, by User Equipment (UE), according to a Listen Before Talk (LBT) result, a starting transmission position for transmission of the UL signal from at least one predefined candidate transmission position; and
starting, by the UE, a transmission of the UL signal at the determined starting transmission position,
wherein the determining, by the UE, according to the LBT result, the starting transmission position for transmission of the UL signal from the at least one predefined candidate transmission position comprises:
for a UL subframe, sequentially sensing, by the UE, whether a channel is idle before each candidate transmission position in the UL subframe from a first candidate transmission position of the UL subframe, until sensing a candidate transmission position when the channel is idle before the candidate transmission position; and
determining the candidate transmission position when the channel is idle before the candidate transmission position as the starting transmission position for transmission of the UL signal; and
wherein, for each candidate transmission position, the determination regarding whether the channel is idle before the candidate transmission position is made according to the following method:
starting detection of at least one of a total power level or a predetermined characteristic signal level on the present channel at a predetermined advance prior to the candidate transmission position;
when the total power level is less than a first predetermined threshold and/or the predetermined characteristic signal level is less than a second predetermined threshold within a predefined duration, determining that the channel is idle before the candidate transmission position; or
when the total power level is not less than the first predetermined threshold and the predetermined characteristic signal level is not less than the second predetermined threshold within the predefined duration, determining that the channel is busy before the candidate transmission.