ALEXANDRIA, Va., June 5 -- United States Patent no. 12,278,921, issued on April 15, was assigned to Huawei Technologies'Co.'Ltd.' (Shenzhen, China).
"Blockchain-based roaming transaction method and apparatus" was invented by Jianan Hong (Shenzhen, China), Yanping Zhang (Shenzhen, China) and Weihua Hu (Shanghai).
According to the abstract* released by the U.S. Patent & Trademark Office: "A blockchain-based roaming transaction method includes sending, by a first network device, a charging data record file to a second network device; publishing, by the first network device, a currency statement to a blockchain; and receiving, by the first network device feedback information of the charging data record file from the second network device."
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