Public land mobile network selection method, equipment and system

Abstract

The embodiment of the invention provides a public land mobile network selection method, equipment and a system and relates to the field of communication. Users are enabled to accurately select a public land mobile network in the process of circuit domain fallback so that a circuit domain service can be provided for the user and accurate billing can be provided for the user. The method comprises the following steps: an attachment request accepting message or a location update request accepting message is sent to user equipment after registration or location update of the user equipment in a circuit switching (CS) domain are completed; and a circuit domain fallback public land mobile network list is acquired according to the attachment request accepting message or the location update request accepting message so that an available 2G or 3G network corresponding to a public land mobile network can be selected according to the circuit domain fallback public land mobile network list to process a CS domain service for a user terminal, wherein the circuit domain fallback public land mobile network list is a circuit domain fallback public land mobile network allowing list or a circuit domain fallback public land mobile network banning list. The public land mobile network selection method provided by the embodiment of the invention is used for public land mobile network selection.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method, equipment and system for selecting a public land mobile network. Background technique [0002] 3GPP (3rd Generation Partnership Project, 3rd Generation Partnership Project) proposed CSFB (CS Fallback, circuit domain fallback) technology and SMS over SGs (Short Message Service over SGs short message transmission) technology. Among them, the SMS over SGs technology allows the UE residing in the E-UTRAN (Evolved UMTS Territorial Radio Access Network, evolved UMTS terrestrial radio access network) to use the existing CS (Circuit Switched, circuit switched) domain equipment to implement CS short The CSFB technology enables the UE (User Equipment) covered by the E-UTRAN to fall back to the CS domain of the 2G or 3G network through the E-UTRAN to complete service processing when it needs to process CS voice services. [0003] In order to greatly reduce the operator's heavy w...

AI Technical Summary

Problems solved by technology

However, in the prior art, the UE may not be able to select the PLMN corresponding to the LAI. At this time, the UE may select another 2G or 3G network corresponding to the available PLMN of the operator, and complete registration on this network to provide the UE with service to provide users with CS domain services, which will charge fees according to the agreement between another operator and the UE's home location, resulting in UE billing problems

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