Patent ID: 9516694
Filing Date: 2016-12-06
CPC Classification: H04W

Claim Text:
1. A method for inter radio access technology (IRAT) cell reselection, comprising: identifying that a user equipment (UE) in an idle or a discontinuous reception (DRX) mode is camped on a cell of a first RAT, wherein the cell belongs to a public land mobile network (PLMN) identifier associated with an operator and the first RAT; determining that neighbor information broadcast by the cell the UE is camped on does not include information of any neighbor cell of a second RAT and that the PLMN identifier associated with the cell of the first RAT belongs to a known list of PLMN identifiers; determining that the UE is configured to enable searching for one or more frequencies of the second RAT in response to determining that the cell the UE is camped on is not broadcasting any neighbor cell of the second RAT and that the PLMN identifier associated with the cell of the first RAT belongs to the known list of PLMN identifiers; scanning the one or more frequencies of the second RAT associated with the PLMN identifier of the operator in response to determining that the PLMN identifier has functionality enabled to search for the one or more frequencies of the second RAT, wherein the scanning for the one or more frequencies of the second RAT associated with the PLMN identifier of the operator is performed in a background at the UE; and triggering a cell reselection to a cell of the second RAT, wherein the cell of the second RAT is associated with a frequency identified during the scanning.