PLMN selection method, mobile terminal, BSC and core network device

摘要

Embodiments of the present invention disclose a public land mobile network PLMN selection method, including: when a mobile terminal is about to hand over from a first cell to a neighboring second cell, selecting, by the mobile terminal, a preferred PLMN after handover to the second cell; and sending, by the mobile terminal, identifier ID information of the preferred PLMN to a base station controller to which the first cell belongs. The embodiments of the present invention further disclose a mobile terminal, a base station controller, and a core network device. By applying the present invention, the PLMN to which the mobile terminal intends to hand over can be determined properly.

主权项

1. A Public Land Mobile Network (PLMN) selection method, comprising:
receiving, by a core network device, a handover request from a base station controller, wherein the handover request is used to request handover of a mobile terminal from a first cell to a neighboring second cell, wherein the mobile terminal is in a cell to which the base station controller belongs; selecting, by the core network device, according to subscription attribute information of the mobile terminal, a preferred PLMN of the mobile terminal from sharing PLMNs of the second cell, comprising: when the home PLMN of the mobile terminal is one of the sharing PLMNs of the second cell, the home PLMN is directly used as the preferred PLMN of the mobile terminal; when the home PLMN of the mobile terminal is not one of the sharing PLMNs of the second cell, a PLMN that has subscribed a tariff preference policy with the home PLMN of the mobile terminal in the sharing PLMNs of the second cell is used as the preferred PLMN of the mobile terminal; and performing, by the core network device, a handover process according to the handover request, and sending identity (ID) information of the preferred PLMN of the mobile terminal to a base station controller to which the second cell belongs.