# US 2019/0246325 A1 · Method and device of reselecting cell by terminal > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0246325 A1 - Document ID: US20190246325A1 - Status: Published application - Kind: A1 - Application number: 16/384,493 - Filed: 2019-04-15 - Published: 2019-08-08 - Earliest claimed: 2015-03-10 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Jaewook Lee; Youngdae Lee; Sunghoon Jung; Sangwon Kim - Web page: https://patentgrep.com/patent/US20190246325A1 ## CPC - H04W 24/08: Testing, {supervising or monitoring} using real traffic - H04W 36/08: Reselecting an access point - H04W 36/302: {due to low signal strength} - H04W 48/16: Discovering, processing access restriction or access information - H04W 48/20: Selecting an access point - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Provided are a method of reselecting a cell by a terminal in a wireless communication system and a device supporting the same. A terminal may measure a cell on the basis of a priority, may calculate a ranking of the cell, using a cell measurement result, and may reselect a cell having the highest ranking. Otherwise, the terminal may measure a cell and evaluate a cell reselection criterion on the basis of a priority, may calculate a CE level with respect to a cell satisfying the cell reselection criterion evaluation, using a cell measurement result, and may reselect a cell having the lowest CE level. The terminal may be a terminal operating in a coverage extension mode and the coverage extension mode enables the cell measurement to be performed for a longer time than a normal mode. ## Claims ### Claim 1 A method of reselecting a cell, which belongs to an inter-frequency, by a user equipment (UE) in an enhanced coverage, the method comprising: based on a frequency priority, measuring the cell, which belongs to the inter-frequency, to obtain a cell measurement result, wherein a frequency priority of the inter-frequency to which the cell belongs is not equal to a frequency priority of a serving frequency to which a serving cell belongs; obtaining a ranking of the cell based on the cell measurement result and a ranking of the serving cell; and based on the obtained rankings, reselecting one cell having a best ranking among the cell and the serving cell. ### Claim 2 (depends on 1) The method of claim 1, wherein when the cell has a higher ranking than the serving cell during a timer duration and when a specific time duration elapses after the UE moves to the serving cell, the one cell having a best ranking is reselected among the cell and the serving cell. ### Claim 3 (depends on 1) The method of claim 1, wherein the frequency priority is not considered by the UE when the UE reselects the one cell. ### Claim 4 (depends on 1) The method of claim 1, wherein the one cell is a cell having a highest ranking among neighboring cells having a higher ranking than the serving cell. ### Claim 5 (depends on 1) The method of claim 1, wherein the obtaining a ranking of the cell comprises: determining whether the cell meets a first threshold that does not satisfy a cell selection condition or a second threshold that does satisfy the cell selection condition. ### Claim 6 (depends on 5) The method of claim 5, wherein the cell selection condition is satisfied when values Srxlev and Squal exceed 0, wherein the first threshold is Qrxlevmin and Qqualmin for obtaining the values Srxlev and Squal in normal coverage, wherein the second threshold is Qrxlevmin_CE and Qqualmin_CE for obtaining the values Srxlev and Squal in enhanced coverage, and wherein the first threshold is greater than the second threshold. ### Claim 7 (depends on 1) The method of claim 1, wherein the measuring the cell comprises: measuring the cell in the enhanced coverage for a longer time than in a normal mode. ### Claim 8 A user equipment (UE) that is in an enhanced coverage for reselecting a cell which belongs to an inter-frequency, the UE comprising: a memory; a transceiver, and a processor operatively coupled to the memory and the transceiver, wherein the processor is configured for: based on a frequency priority, measuring the cell, which belongs to the inter-frequency, to obtain a cell measurement result, wherein a frequency priority of the inter-frequency to which the cell belongs is not equal to a frequency priority of a serving frequency to which a serving cell belongs; obtaining a ranking of the cell based on the cell measurement result and a ranking of the serving cell; and based on the obtained rankings, reselecting one cell having a best ranking among the cell and the serving cell. ### Claim 9 (depends on 8) The UE of claim 8, wherein when the cell has a higher ranking than the serving cell during a timer duration and when a specific time duration elapses after the UE moves to the serving cell, the one cell having a best ranking is reselected among the cell and the serving cell. ### Claim 10 (depends on 8) The UE of claim 8, wherein the frequency priority is not considered by the UE when the UE reselects the one cell. ### Claim 11 (depends on 8) The UE of claim 8, wherein the one cell is a cell having a highest ranking among neighboring cells having a higher ranking than the serving cell. ### Claim 12 (depends on 8) The UE of claim 8, wherein the obtaining a ranking of the cell comprises: determining whether the cell meets a first threshold that does not satisfy a cell selection condition or a second threshold that does satisfy the cell selection condition. ### Claim 13 (depends on 12) The UE of claim 12, wherein the cell selection condition is satisfied when values Srxlev and Squal exceed 0, wherein the first threshold is Qrxlevmin and Qqualmin for obtaining the values Srxlev and Squal in normal coverage, wherein the second threshold is Qrxlevmin_CE and Qqualmin_CE for obtaining the values Srxlev and Squal in enhanced coverage, and wherein the first threshold is greater than the second threshold. ### Claim 14 (depends on 8) The UE of claim 8, wherein the measuring the cell comprises: measuring the cell in the enhanced coverage for a longer time than in a normal mode. ### Claim 15 (depends on 1) The method of claim 1, further comprising: communicating with a base station via the reselected cell. ### Claim 16 (depends on 8) The UE of claim 8, wherein the processor is configured for communicating with a base station via the reselected cell.