Key setting method in radio network controller (RNC) and wireless network controller as well as terminal

Abstract

The embodiment of the invention provides a key setting method in a radio network controller (RNC) and a wireless network controller as well as a terminal. When a source RNC executes a serving radio network subsystem (SRNS) relocation flow which is not anticipated by a user equipment (UE), the method comprises the following steps that: a target RNC receives a key transmitted by the source RNC, and the key is obtained by deriving a key utilized by the source RNC; the target RNC encrypts a first downlink radio resource control (RRC) message according to the key transmitted by the source RNC and transmits the encrypted first downlink RRC message to the UE, and the encrypted first downlink RRC message includes information that the target RNC supports a universal key holder (UKH); the target RNC receives an uplink RRC message transmitted by the UE, and the uplink RRC message includes the information that the UE supports the UKH; and the target RNC acquires a new key to encrypt a second downlink RRC message and transmits the second downlink RRC message to the UE. The embodiment realizes the information interaction between the target RNC and the UE and the isolation of the key.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a key setting method in RNC handover, a radio network controller and a terminal. Background technique [0002] In UMTS (Universal Mobile Telecommunications System, universal mobile communication system), with the adoption of HSPA (High Speed ​​Packet Access, high-speed packet access) technology, the 3GPP standard proposes research on HSPA+, that is, the evolution of HSPA. Improve the system security after the evolution of the HSPA+ flat architecture, and also start the UTRAN (Universal Terrestrial Radio Access Network, Universal Terrestrial Radio Access Network, Universal Terrestrial Radio Access Network) key enhancement research project. The purpose of this research project is to introduce the key architecture of E-UTRAN into the HSPA+ network, and realize the same security level of HSPA+ and E-UTRAN. In the HSPA+ network, the enhanced RNC (RadioNetwork Controller, radio ...

AI Technical Summary

Problems solved by technology

[0003] In the SRNS Relocation process in which the UE does not participate in the prior art, after switching to the target RNC, the UE does not know which key to use to decrypt the first downlink RRC message, so that the information exchange between the target RNC and the UE cannot be realized

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