ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,477,317, issued on Nov. 18, was assigned to Huawei Technologies'Co.'Ltd.' (Shenzhen, China).
"Roaming method, apparatus, and system" was invented by Fangyuan Zhu (Beijing), Yan Li (Beijing) and Jianning Liu (Shenzhen, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "Embodiments of this application provide a roaming method. The method includes: A terminal device accesses a second PLMN when the terminal device cannot access a first PLMN, where a dynamic roaming agreement between the second PLMN and the first PLMN is enabled; the terminal device receives indication information from the second PLMN, where the indication information is used to indicate t...