US 12,219,610 B2
Preamble-based locating method and device
Yingjie Yu, Shanghai (CN); Su Huang, Shanghai (CN); and Yi Wang, Shanghai (CN)
Assigned to Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed on Mar. 30, 2022, as Appl. No. 17/709,142.
Application 17/709,142 is a continuation of application No. PCT/CN2019/109760, filed on Sep. 30, 2019.
Prior Publication US 2022/0225426 A1, Jul. 14, 2022
Int. Cl. H04W 74/08 (2024.01); H04W 24/10 (2009.01); H04W 56/00 (2009.01); H04W 64/00 (2009.01); H04W 74/0833 (2024.01)
CPC H04W 74/0833 (2013.01) [H04W 24/10 (2013.01); H04W 56/001 (2013.01); H04W 64/003 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A preamble-based locating method comprising:
receiving, by a location management function network element in a core network, first indication information from a first network device, wherein the first indication information indicates a first random access channel resource that is used when a terminal device communicates with the first network device and at least one second network device;
determining, by the location management function network element, a second random access channel resource from the received first random access channel resource;
sending, by the location management function network element, second indication information to the terminal device, wherein the second indication information indicates the second random access channel resource, and further indicates the terminal device to send a preamble to the first network device and the at least one second network device, so as to enable the terminal device to send the preamble to the first network device and the at least one second network device;
sending, by the location management function network element, a location information request to the first network device and each second network device;
receiving, by the location management function network element, measurement information from both the first network device and each second network device, wherein the measurement information indicates location information of the terminal device that is measured by network devices;
determining, by the location management function network element, a location of the terminal device based on the measurement information; and
wherein the second indication information comprises an identifier of each cell and fourth indication information corresponding to each cell, and the fourth indication information indicates the second random access channel resource corresponding to the cell.