Method and user equipment for negotiating security during handover between different radio access technologies

摘要

Solution for security negotiation during handover of a user equipment (UE) between different radio access technologies are provided. In the solution, the UE receives NAS security information and AS security information which are selected by the target system and then performs security negotiation with the target system according to the received NAS security information and AS security information. As such, the UE may obtain the key parameter information of the NAS and AS selected by a LTE system and perform security negotiation with the LTE system when the UE hands over from a different system, such as a UTRAN, to the LTE system.

主权项

1. A communication method in a handover from a source system supporting a first radio access technology to a target system supporting a second radio access technology different from the first radio access technology, comprising:
receiving, by a user equipment, a transparent container from the source system, wherein the transparent container including algorithm information of a non access stratum (NAS) and algorithm information of an access stratum (AS) which are selected by the target system; and deriving, by the user equipment, NAS keys according to the algorithm information of the NAS; deriving, by the user equipment, radio resource control (RRC) and user plane (UP) keys according to the algorithm information of the AS; and handing over, by the user equipment, from the source system to the target system by using the NAS keys and the RRC and UP keys.