# US 8,543,113 B2 · Method and system for controlling cell reselections on a computing device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,543,113 B2 - Document ID: US8543113B2 - Status: Granted - Kind: B2 - Application number: 12/885,499 - Filed: 2010-09-18 - Published: 2012-03-22 - Granted: 2013-09-24 - Earliest claimed: 2010-09-18 - Assignees: Palm, Inc. - Applicants: Puneet Bhandari - Inventors: Puneet Bhandari - Web page: https://patentgrep.com/patent/US8543113B2 ## CPC - 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 A method and a system for controlling cell reselection on a computing device are disclosed. The method comprises detecting the mobile device operating under a potential over-shuttling reselection condition, and making a determination as to whether the mobile computing device operation is operating under the over-shuttling reselection condition based on pre-determined criteria. ## Claims ### Claim 1 A method for controlling cell reselection in a mobile device, the method being performed by one or more processors of the mobile device and comprising: detecting a mobile device operation as operating under a potential over-shuttling reselection condition in which the mobile device is triggered to switch from a serving cell to a target cell based, at least in part, on quality conditions of the serving cell in use by the mobile device; responding to detecting the mobile device operation as operating under the potential over-shuttling reselection condition by making a determination as to whether the mobile device operation is classified to be operating under an over-shuttling reselection condition based on pre-determined criteria that considers information about one or more cell reselections made by the mobile device in a given time period, wherein making the determination is further performed by (i) deriving a first value based on a number of cell reselections made by the mobile device that relate to the serving cell or the target cell and a total number of cell reselections made by the mobile device in the given time period, and (ii) comparing the first value to a pre-determined value; and preventing or delaying the mobile device from switching from the serving cell to the target cell in response to the determination that the mobile device operation is operating under the over-shuttling reselection condition. ### Claim 2 (depends on 1) The method of claim 1, wherein the information about one or more cell reselections made by the mobile device includes characteristics for each serving cell and each target cell for each of the one or more reselections made by the mobile device. ### Claim 3 (depends on 2) The method of claim 2, wherein the characteristics include at least one or more of: (i) frequency, (ii) scrambling code, (iii) location area code, and (iv) cell identity for each serving cell and each target cell. ### Claim 4 (depends on 1) The method of claim 1, wherein the pre-determined value is customizable. ### Claim 5 (depends on 1) The method of claim 1, wherein preventing the mobile device from switching from the serving cell to the target cell comprises increasing a reselection timer duration associated with the over-shuttling reselection condition so that the mobile device is prevented from switching from the serving cell to the target cell unless a rank of the target cell is higher than a rank of the serving cell for the reselection timer duration. ### Claim 6 (depends on 5) The method of claim 5, wherein the reselection timer duration is increased to a maximum value allowable. ### Claim 7 (depends on 1) The method of claim 1, wherein the pre-determined criteria includes a plurality of radio frequency conditions and cell reselection parameters. ### Claim 8 (depends on 7) The method of claim 7, wherein the plurality of radio frequency conditions comprises at least one or more of: (i) a cell selection criterion, (ii) a cell-ranking criterion, and (iii) a hysteresis value. ### Claim 9 A mobile device comprising: one or more processors configured to: detect a mobile device operation as operating under a potential over-shuttling reselection condition in which the mobile device is triggered to switch from a serving cell to a target cell based, at least in part, on quality and/or strength conditions of the serving cell in use by the mobile device; respond to detecting the mobile device operation as operating under the potential over-shuttling reselection condition by making a determination as to whether the mobile device operation is classified to be operating under an over-shuttling reselection condition based on a pre-determined criteria that considers information about one or more cell reselections made by the mobile device in a given time period, wherein making the determination is further performed by (i) deriving a first value based on a number of cell reselections made by the mobile device that relate to the serving cell or the target cell and a total number of cell reselections made by the mobile device in the given time period, and (ii) comparing the first value to a pre-determined value; and prevent or delay the mobile device from switching from the serving cell to the target cell in response to the determination that the mobile device operation is operating under the over-shuttling reselection condition. ### Claim 10 (depends on 9) The mobile device of claim 9, wherein the information about one or more cell reselections made by the mobile device includes characteristics for each serving cell and each target cell for each of the one or more reselections made by the mobile device. ### Claim 11 (depends on 10) The mobile device of claim 10, wherein the characteristics include at least one or more of: (i) frequency, (ii) scrambling code, (iii) location area code, and (iv) cell identity for each serving cell and each target cell. ### Claim 12 (depends on 9) The mobile device of claim 9, wherein the pre-determined value is customizable. ### Claim 13 (depends on 9) The mobile device of claim 9, wherein preventing the mobile device from switching from the serving cell to the target cell comprises increasing a reselection timer duration associated with over-shuttling reselection condition so that the mobile device is prevented from switching from the serving cell to the target cell unless a rank of the target cell is higher than a rank of the serving cell for the reselection timer duration. ### Claim 14 (depends on 13) The mobile device of claim 13, wherein the reselection timer duration is increased to a maximum value allowable. ### Claim 15 (depends on 9) The mobile device of claim 9, wherein the pre-determined criteria includes a plurality of radio frequency conditions. ### Claim 16 (depends on 15) The mobile device of claim 15, wherein the plurality of radio frequency conditions comprises at least one or more of: (i) a cell selection criterion, (ii) a cell-ranking criterion, and (iii) a hysteresis value. ### Claim 17 A cellular radio module for a computing device, the cellular radio module including: one or more processors configured to: detect a computing device operation as operating under a potential over-shuttling reselection condition in which the computing device is triggered to switch from a serving cell to a target cell based, at least in part, on quality and/or strength conditions of the serving cell in use by the computing device; respond to detecting the computing device operation as operating under the potential over-shuttling reselection condition by making a determination as to whether the computing device operation is classified to be operating under an over-shuttling reselection condition based on a pre-determined criteria that considers information about one or more cell reselections made by the computing device in a given time period, wherein making the determination is further performed by (i) deriving a first value based on a number of cell reselections made by the computing device that relate to the serving cell or the target cell and a total number of cell reselections made by the computing device in the given time period, and (ii) comparing the first value to a pre-determined value; and prevent or delay the computing device from switching from the serving cell to the target cell in response to the determination that the computing device operation is operating under the over-shuttling reselection condition. ### Claim 18 (depends on 17) The cellular radio module of claim 17, wherein the information about one or more cell reselections made by the computing device includes characteristics for each serving cell and each target cell for each of the one or more reselections made by the computing device. ### Claim 19 (depends on 18) The cellular radio module of claim 18, wherein the characteristics include at least one or more of: (i) frequency, (ii) scrambling code, (iii) location area code, and (iv) cell identity for each serving cell and each target cell. ### Claim 20 (depends on 17) The cellular radio module of claim 17, wherein the one or more processors prevent the computing device from switching from the serving cell to the target cell by increasing a reselection timer duration associated with the over-shuttling reselection condition so that the computing device is prevented from switching from the serving cell to the target cell unless a rank of the target cell is higher than a rank of the serving cell for the reselection timer duration.