# US 10,375,228 B2 · Systems and methods for detecting call handedness > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,375,228 B2 - Document ID: US10375228B2 - Status: Granted - Kind: B2 - Application number: 15/695,351 - Filed: 2017-09-05 - Published: 2019-03-07 - Granted: 2019-08-06 - Earliest claimed: 2017-09-05 - Assignees: Apple Inc. - Applicants: Apple Inc. - Inventors: Xiaoyuan Tu; Purvi J. Desai; Maulik V. Choksi; Anil Kandangath - Web page: https://patentgrep.com/patent/US10375228B2 ## CPC - H04M 1/72454: according to context-related or environment-related conditions - H04M 1/72448: with means for adapting the functionality of the device according to specific conditions - H04W 4/026: {using orientation information, e.g. compass} - H04W 88/02: Terminal devices - H04M 1/0281: {for providing single handed use or left/right hand conversion} - H04M 2250/10: including a GPS signal receiver - H04M 2250/12: including a sensor for measuring a physical value, e.g. temperature or motion - H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Methods and systems for improving signal reception and call quality by detecting a user's handedness of holding a mobile device during a call are described. Motion data of the mobile device can be collected by one or more motion sensor. A screen tilt angle can be determined and compared with a threshold tilt angle. A screen swivel angle can be determined and compared with a threshold swivel angle. A call handedness can be determined based on the screen swivel angle. One or more parameters of an antenna can be adjusted based on the call handedness. ## Claims ### Claim 1 A method for improving signal reception and call quality of a mobile device while a user is holding the mobile device during a call, the method comprising: collecting, by one or more motion sensors of the mobile device, motion data of the mobile device; determining, by a processor circuit of the mobile device, one or more constraints are met based on the motion data; determining, by the processor circuit , a screen swivel angle of the mobile device based on the motion data; determining, by the processor circuit, a handedness of the user while holding the mobile device based on the determined screen swivel angle; and adjusting, by the processor circuit, one or more parameters of an antenna of the mobile device based on the determined handedness of the user, wherein the one or more parameters comprise frequency, wherein the adjustment improves the signal reception and call quality of the mobile device. ### Claim 2 (depends on 1) The method of claim 1, wherein the one or more parameters of the antenna comprise at least one of gain, radiation pattern, or power. ### Claim 3 (depends on 1) The method of claim 1, comprising: filtering, by the processor circuit, the collected motion data using a low-pass filter, wherein determining the screen swivel angle of the mobile device is based on the filtered motion data. ### Claim 4 (depends on 3) The method of claim 3, wherein the low-pass filter comprises a cut-off frequency of between 1 Hz and 50 Hz. ### Claim 5 (depends on 1) The method of claim 1, wherein determining the one or more constraints are met comprises: calculating, by the processor circuit, a screen tilt angle of the mobile device based on the motion data; and determining, by the processor circuit, the screen tilt angle is less than a threshold tilt angle. ### Claim 6 (depends on 5) The method of claim 5, wherein the threshold tilt angle is 55 degrees. ### Claim 7 (depends on 1) The method of claim 1, wherein determining the one or more constraints are met comprises: determining, by the processor circuit, the screen swivel angle is greater than a threshold swivel angle. ### Claim 8 (depends on 7) The method of claim 7, wherein the threshold swivel angle is 25 degrees. ### Claim 9 (depends on 1) The method of claim 1, wherein determining one or more constraints are met comprises: determining, by the processor circuit, a mean acceleration of the mobile device based on the motion data; and determining, by the processor circuit, the mean acceleration is within a pre-defined acceleration range. ### Claim 10 (depends on 9) The method of claim 9, wherein the pre-defined acceleration range is 0.75 g to 1.25 g. ### Claim 11 (depends on 1) The method of claim 1, wherein the one or more motion sensors comprise at least one of an accelerometer or a gyroscope. ### Claim 12 A system for improving signal reception and call quality of a mobile device while a user is holding the mobile device during a call, the system comprising: an antenna; one or more motion sensors configured to collect motion data of the mobile device; and a processor circuit coupled to the antenna and the one or more motion sensors, and configured to execute instructions causing the processor circuit to: determine one or more constraints are met based on the motion data; determine a screen swivel angle of the mobile device based on the motion data; determine a handedness of the user while holding the mobile device based on the determined screen swivel angle; and adjust one or more parameters of the antenna based on the determined handedness of the user, wherein the one or more parameters comprise frequency, wherein the adjustment improves the signal reception and call quality of the mobile device. ### Claim 13 (depends on 12) The system of claim 12, wherein the one or more parameters of the antenna comprise at least one of gain, radiation pattern, or power. ### Claim 14 (depends on 12) The system of claim 12, wherein the instructions further cause the processor circuit to: filter the collected motion data using a low-pass filter; and determine the screen swivel angle of the mobile device based on the filtered motion data. ### Claim 15 (depends on 14) The system of claim 14, wherein the low-pass filter comprises a cut-off frequency of between 1 Hz and 50 Hz. ### Claim 16 (depends on 12) The system of claim 12, wherein the one or more constraints comprise: the determined screen swivel angle of the mobile device is greater than a threshold swivel angle. ### Claim 17 (depends on 16) The system of claim 16, wherein the threshold tilt angle is 55 degrees. ### Claim 18 (depends on 12) The system of claim 12, wherein the one or more motion sensors comprise at least one of an accelerometer or a gyroscope. ### Claim 19 A non-transitory computer-readable medium storing program instructions that are executable to: collect, by one or more motion sensors of a mobile device, motion data of the mobile device; determine, by a processor circuit of the mobile device, one or more constraints are met based on the motion data; determine, by the processor circuit, a screen swivel angle of the mobile device based on the motion data; determine, by the processor circuit, a handedness of the user while holding the mobile device based on the determined screen swivel angle; and adjust, by the processor circuit, one or more parameters of an antenna of the mobile device based on the determined handedness of the user, wherein the one or more parameters comprise frequency, wherein the adjustment improves the signal reception and call quality of the mobile device.