Patent ID: 9307486
Filing Date: 2016-04-05
CPC Classification: H04W

Claim Text:
1. A user equipment comprising: a cell search unit configured to execute a cell search; a detector configured to detect that reconnection is required; a storage unit configured to store voice over IP (VoIP) support information that indicates, for each of a plurality of operators, whether voice packet communication is allowed for each of a first mobile communication system, as a first radio access technology (RAT), in which communication is executed in accordance with a first radio access scheme and a second mobile communication system, as a second RAT, in which communication is executed in accordance with a second radio access scheme; a cell search target determination unit configured to report, to the cell search unit, only one or more RATs that allow the voice packet communication of the first RATs and the second RATs that are operated by the operators as a target of the cell search by referring to the VoIP support information, in response to determining, by the detector, that the reconnection is required for the voice packet communication; and a communication unit configured to communicate in a cell that is detected by the cell search, wherein the VoIP support information is reported from a switching center of a network during location registration or an attach procedure, and the VoIP support information is stored in the storage unit.