Method and device for selecting core network to be accessed

Abstract

The embodiment of the invention discloses a method and a device for selecting a core network to be accessed. The method for selecting the core network to be accessed comprises the following steps of: broadcasting a core network identifier of a shared radio access network (RAN) to user equipment (UE); receiving a core network selection indication message generated and transmitted according to the broadcast core network identifier of the shared RAN from the UE; and judging whether the core network selection indication message carries a home core network identifier or not, and if the core network selection indication message carries the home core network identifier, selecting the core network to be accessed for the UE according to an access control strategy configured in advance by a network side. By the scheme, the network side can learn that the UE is a roaming user according to the home core network identifier reported by the UE, and further select the core network to be accessed for the UE according to the access control strategy which is configured in advance, thereby realizing the flexible control of an operator over the core network to be accessed by the roaming user.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and device for selecting access to a core network. Background technique [0002] The mobile communication network system consists of RAN (Radio Access Network, wireless access network) and CN (Core Network, core network). In the traditional mobile network operation mode, each operator operates RAN and CN independently. In the new mobile network operation mode, multiple operators can operate CN independently and share RAN. [0003] Different mobile operators will sign an agreement to allow UEs (User Equipment, user equipment) that are subscribed to the other party's network to access in their own network. HPLMN (Home Public Land Mobile Network, belonging to the general land mobile network) access, the UE at this time is called a roaming user. When a roaming user accesses a shared RAN, since multiple CNs share the RAN, it is necessary to select a CN to serve the ...

AI Technical Summary

Problems solved by technology

For a GSM network or UMTS network, the shared RAN can only broadcast one CN identity. If the roaming user’s contract operator has not signed an agreement with the broadcasted CN operator, the roaming user will not be able to access the shared RAN.

For LTE networks, although the shared RAN can broadcast multiple CN identities, the final CN selection result still depends on the UE's own selection strategy, which cannot be controlled by the network side

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