Network registration method and device

Abstract

The invention discloses a network registration method, which is applied to a terminal device, the terminal device establishes a communication connection with a first access network device, the first access network device comprises a first security context established by the terminal device and a second access network device, and the method comprises the following steps: sending a registration request message to the first access network device, wherein the registration request message comprises an EPS serial number, the EPS serial number is used for indicating that a target parameter P0 is a first parameter value, and the P0 is a mapping key; receiving a security mode command message sent by the first access network device, the security mode command message being processed by the first access network device according to a second security context, the second security context being obtained by mapping the first security context by the first access network device according to P0; and if the integrity check of the security mode command message succeeds, sending a security mode completion message to the first access network device. The method can improve the registration success rate of the terminal equipment on the communication network.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular to a network registration method and device. Background technique [0002] If the 5G multi-mode terminal successfully registers on the 4G network, a security context will be established with the 4G network. During the movement of the 5G multimode terminal, it may be disconnected from the 4G network and stay on the 5G network. During the registration process of the 5G multimode terminal on the 5G network, if the 5G network chooses to use the security context established by the 5G multimode terminal in the 4G network, the 5G multimode terminal and the 5G network can map the security context of the 4G network It can be used in the security context of the 5G network. [0003] It should be noted that the mapping of the security context of the 4G network to the security context of the 5G network by the 5G multi-mode terminal and the 5G network is relatively indepe...

AI Technical Summary

Problems solved by technology

When mapping, it is necessary to ensure that the information used for mapping in the 5G multimode terminal and the 5G network is the same. If the two information is different, the mapping result of the 5G multimode terminal will be inconsistent with the mapping result of the 5G network.

Inconsistent mapping results will further lead to the failure of 5G multi-mode terminals to register in the 5G network

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