Patent ID: 11956715
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. A method, comprising:
receiving, by an access network device, a first registration request message from an apparatus, wherein the first registration request message comprises first slice selection assistance information, the first slice selection assistance information is obtained by encrypting second slice selection assistance information, and the second slice selection assistance information is selection assistance information of a slice the apparatus is allowed to access;
receiving, by the access network device, a first random number (RAND) from a mobility management network element, or receiving, by the access network device, a second RAND and a first key from the mobility management network element, and generating the first RAND based on the second RAND and the first key;
generating, by the access network device, the second slice selection assistance information based on the first slice selection assistance information, a first function, and the first RAND, or generating, by the access network device, the second slice selection assistance information based on the first slice selection assistance information, an inverse function of a first function, and the first RAND; and
sending, by the access network device, a second registration request message to the mobility management network element, wherein the second registration request message comprises the second slice selection assistance information.