US 12,445,989 B2
Timing synchronization method and apparatus
Fengwei Liu, Chengdu (CN); Shitong Yuan, Chengdu (CN); and Jing Qiu, Chengdu (CN)
Assigned to Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed on Feb. 15, 2022, as Appl. No. 17/672,516.
Application 17/672,516 is a continuation of application No. PCT/CN2020/084061, filed on Apr. 9, 2020.
Claims priority of application No. PCT/CN2019/101213 (WO), filed on Aug. 16, 2019; application No. PCT/CN2019/102605 (WO), filed on Aug. 26, 2019; and application No. PCT/CN2019/109634 (WO), filed on Sep. 30, 2019.
Prior Publication US 2022/0174636 A1, Jun. 2, 2022
Int. Cl. H04W 56/00 (2009.01)
CPC H04W 56/0045 (2013.01) 20 Claims
OG exemplary drawing
 
1. A method, comprising:
determining a sending moment of a distributed unit (DU) of a first node for sending data in a downlink transmit frame of the DU, the sending moment for the downlink transmit frame being earlier than a receiving moment of a downlink receive frame of a mobile terminal (MT) of the first node by an advanced time, the downlink receive frame configured for receiving data from a parent node of the first node, and the advanced time satisfying:
(NTA+NTA,offset)·Tc/2+T_delta,
wherein NTA is an index indicating a timing advance (TA) of the first node for uplink transmission, NTA,offset is a timing advance offset of a serving cell, Tc=1/(Δfmax·Nf), Δfmax=480·103, and Nf=4096, and T_delta is a timing adjustment amount received from the parent node by the first node to compensate for a difference between TA/2, which is determined from NTA received from the parent node by the first node, and a transmission time Tp between the first node and the parent node; and
sending data by the DU of the first node according to the sending moment,
wherein T_delta satisfies:
(−NTA,offset/2+NT_delta,min+NT_delta·GT_delta)Tc,
wherein nT_delta is configured by the parent node of the first node, and NT_delta,min and GT_delta are values that are configured by the parent node, or are determined by using a protocol text.